/* Language-independent node constructors for parse phase of GNU compiler. Copyright (C) 1987-2021 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see . */ /* This file contains the low level primitives for operating on tree nodes, including allocation, list operations, interning of identifiers, construction of data type nodes and statement nodes, and construction of type conversion nodes. It also contains tables index by tree code that describe how to take apart nodes of that code. It is intended to be language-independent but can occasionally calls language-dependent routines. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "backend.h" #include "target.h" #include "tree.h" #include "gimple.h" #include "tree-pass.h" #include "ssa.h" #include "cgraph.h" #include "diagnostic.h" #include "flags.h" #include "alias.h" #include "fold-const.h" #include "stor-layout.h" #include "calls.h" #include "attribs.h" #include "toplev.h" /* get_random_seed */ #include "output.h" #include "common/common-target.h" #include "langhooks.h" #include "tree-inline.h" #include "tree-iterator.h" #include "internal-fn.h" #include "gimple-iterator.h" #include "gimplify.h" #include "tree-dfa.h" #include "langhooks-def.h" #include "tree-diagnostic.h" #include "except.h" #include "builtins.h" #include "print-tree.h" #include "ipa-utils.h" #include "selftest.h" #include "stringpool.h" #include "attribs.h" #include "rtl.h" #include "regs.h" #include "tree-vector-builder.h" #include "gimple-fold.h" #include "escaped_string.h" /* Tree code classes. */ #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE, #define END_OF_BASE_TREE_CODES tcc_exceptional, const enum tree_code_class tree_code_type[] = { #include "all-tree.def" }; #undef DEFTREECODE #undef END_OF_BASE_TREE_CODES /* Table indexed by tree code giving number of expression operands beyond the fixed part of the node structure. Not used for types or decls. */ #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH, #define END_OF_BASE_TREE_CODES 0, const unsigned char tree_code_length[] = { #include "all-tree.def" }; #undef DEFTREECODE #undef END_OF_BASE_TREE_CODES /* Names of tree components. Used for printing out the tree and error messages. */ #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME, #define END_OF_BASE_TREE_CODES "@dummy", static const char *const tree_code_name[] = { #include "all-tree.def" }; #undef DEFTREECODE #undef END_OF_BASE_TREE_CODES /* Each tree code class has an associated string representation. These must correspond to the tree_code_class entries. */ const char *const tree_code_class_strings[] = { "exceptional", "constant", "type", "declaration", "reference", "comparison", "unary", "binary", "statement", "vl_exp", "expression" }; /* obstack.[ch] explicitly declined to prototype this. */ extern int _obstack_allocated_p (struct obstack *h, void *obj); /* Statistics-gathering stuff. */ static uint64_t tree_code_counts[MAX_TREE_CODES]; uint64_t tree_node_counts[(int) all_kinds]; uint64_t tree_node_sizes[(int) all_kinds]; /* Keep in sync with tree.h:enum tree_node_kind. */ static const char * const tree_node_kind_names[] = { "decls", "types", "blocks", "stmts", "refs", "exprs", "constants", "identifiers", "vecs", "binfos", "ssa names", "constructors", "random kinds", "lang_decl kinds", "lang_type kinds", "omp clauses", }; /* Unique id for next decl created. */ static GTY(()) int next_decl_uid; /* Unique id for next type created. */ static GTY(()) unsigned next_type_uid = 1; /* Unique id for next debug decl created. Use negative numbers, to catch erroneous uses. */ static GTY(()) int next_debug_decl_uid; /* Since we cannot rehash a type after it is in the table, we have to keep the hash code. */ struct GTY((for_user)) type_hash { unsigned long hash; tree type; }; /* Initial size of the hash table (rounded to next prime). */ #define TYPE_HASH_INITIAL_SIZE 1000 struct type_cache_hasher : ggc_cache_ptr_hash { static hashval_t hash (type_hash *t) { return t->hash; } static bool equal (type_hash *a, type_hash *b); static int keep_cache_entry (type_hash *&t) { return ggc_marked_p (t->type); } }; /* Now here is the hash table. When recording a type, it is added to the slot whose index is the hash code. Note that the hash table is used for several kinds of types (function types, array types and array index range types, for now). While all these live in the same table, they are completely independent, and the hash code is computed differently for each of these. */ static GTY ((cache)) hash_table *type_hash_table; /* Hash table and temporary node for larger integer const values. */ static GTY (()) tree int_cst_node; struct int_cst_hasher : ggc_cache_ptr_hash { static hashval_t hash (tree t); static bool equal (tree x, tree y); }; static GTY ((cache)) hash_table *int_cst_hash_table; /* Class and variable for making sure that there is a single POLY_INT_CST for a given value. */ struct poly_int_cst_hasher : ggc_cache_ptr_hash { typedef std::pair compare_type; static hashval_t hash (tree t); static bool equal (tree x, const compare_type &y); }; static GTY ((cache)) hash_table *poly_int_cst_hash_table; /* Hash table for optimization flags and target option flags. Use the same hash table for both sets of options. Nodes for building the current optimization and target option nodes. The assumption is most of the time the options created will already be in the hash table, so we avoid allocating and freeing up a node repeatably. */ static GTY (()) tree cl_optimization_node; static GTY (()) tree cl_target_option_node; struct cl_option_hasher : ggc_cache_ptr_hash { static hashval_t hash (tree t); static bool equal (tree x, tree y); }; static GTY ((cache)) hash_table *cl_option_hash_table; /* General tree->tree mapping structure for use in hash tables. */ static GTY ((cache)) hash_table *debug_expr_for_decl; static GTY ((cache)) hash_table *value_expr_for_decl; struct tree_vec_map_cache_hasher : ggc_cache_ptr_hash { static hashval_t hash (tree_vec_map *m) { return DECL_UID (m->base.from); } static bool equal (tree_vec_map *a, tree_vec_map *b) { return a->base.from == b->base.from; } static int keep_cache_entry (tree_vec_map *&m) { return ggc_marked_p (m->base.from); } }; static GTY ((cache)) hash_table *debug_args_for_decl; static void set_type_quals (tree, int); static void print_type_hash_statistics (void); static void print_debug_expr_statistics (void); static void print_value_expr_statistics (void); static tree build_array_type_1 (tree, tree, bool, bool, bool); tree global_trees[TI_MAX]; tree integer_types[itk_none]; bool int_n_enabled_p[NUM_INT_N_ENTS]; struct int_n_trees_t int_n_trees [NUM_INT_N_ENTS]; bool tree_contains_struct[MAX_TREE_CODES][64]; /* Number of operands for each OpenMP clause. */ unsigned const char omp_clause_num_ops[] = { 0, /* OMP_CLAUSE_ERROR */ 1, /* OMP_CLAUSE_PRIVATE */ 1, /* OMP_CLAUSE_SHARED */ 1, /* OMP_CLAUSE_FIRSTPRIVATE */ 2, /* OMP_CLAUSE_LASTPRIVATE */ 5, /* OMP_CLAUSE_REDUCTION */ 5, /* OMP_CLAUSE_TASK_REDUCTION */ 5, /* OMP_CLAUSE_IN_REDUCTION */ 1, /* OMP_CLAUSE_COPYIN */ 1, /* OMP_CLAUSE_COPYPRIVATE */ 3, /* OMP_CLAUSE_LINEAR */ 2, /* OMP_CLAUSE_ALIGNED */ 2, /* OMP_CLAUSE_ALLOCATE */ 1, /* OMP_CLAUSE_DEPEND */ 1, /* OMP_CLAUSE_NONTEMPORAL */ 1, /* OMP_CLAUSE_UNIFORM */ 1, /* OMP_CLAUSE_TO_DECLARE */ 1, /* OMP_CLAUSE_LINK */ 2, /* OMP_CLAUSE_FROM */ 2, /* OMP_CLAUSE_TO */ 2, /* OMP_CLAUSE_MAP */ 1, /* OMP_CLAUSE_USE_DEVICE_PTR */ 1, /* OMP_CLAUSE_USE_DEVICE_ADDR */ 1, /* OMP_CLAUSE_IS_DEVICE_PTR */ 1, /* OMP_CLAUSE_INCLUSIVE */ 1, /* OMP_CLAUSE_EXCLUSIVE */ 2, /* OMP_CLAUSE__CACHE_ */ 2, /* OMP_CLAUSE_GANG */ 1, /* OMP_CLAUSE_ASYNC */ 1, /* OMP_CLAUSE_WAIT */ 0, /* OMP_CLAUSE_AUTO */ 0, /* OMP_CLAUSE_SEQ */ 1, /* OMP_CLAUSE__LOOPTEMP_ */ 1, /* OMP_CLAUSE__REDUCTEMP_ */ 1, /* OMP_CLAUSE__CONDTEMP_ */ 1, /* OMP_CLAUSE__SCANTEMP_ */ 1, /* OMP_CLAUSE_IF */ 1, /* OMP_CLAUSE_NUM_THREADS */ 1, /* OMP_CLAUSE_SCHEDULE */ 0, /* OMP_CLAUSE_NOWAIT */ 1, /* OMP_CLAUSE_ORDERED */ 0, /* OMP_CLAUSE_DEFAULT */ 3, /* OMP_CLAUSE_COLLAPSE */ 0, /* OMP_CLAUSE_UNTIED */ 1, /* OMP_CLAUSE_FINAL */ 0, /* OMP_CLAUSE_MERGEABLE */ 1, /* OMP_CLAUSE_DEVICE */ 1, /* OMP_CLAUSE_DIST_SCHEDULE */ 0, /* OMP_CLAUSE_INBRANCH */ 0, /* OMP_CLAUSE_NOTINBRANCH */ 1, /* OMP_CLAUSE_NUM_TEAMS */ 1, /* OMP_CLAUSE_THREAD_LIMIT */ 0, /* OMP_CLAUSE_PROC_BIND */ 1, /* OMP_CLAUSE_SAFELEN */ 1, /* OMP_CLAUSE_SIMDLEN */ 0, /* OMP_CLAUSE_DEVICE_TYPE */ 0, /* OMP_CLAUSE_FOR */ 0, /* OMP_CLAUSE_PARALLEL */ 0, /* OMP_CLAUSE_SECTIONS */ 0, /* OMP_CLAUSE_TASKGROUP */ 1, /* OMP_CLAUSE_PRIORITY */ 1, /* OMP_CLAUSE_GRAINSIZE */ 1, /* OMP_CLAUSE_NUM_TASKS */ 0, /* OMP_CLAUSE_NOGROUP */ 0, /* OMP_CLAUSE_THREADS */ 0, /* OMP_CLAUSE_SIMD */ 1, /* OMP_CLAUSE_HINT */ 0, /* OMP_CLAUSE_DEFAULTMAP */ 0, /* OMP_CLAUSE_ORDER */ 0, /* OMP_CLAUSE_BIND */ 1, /* OMP_CLAUSE__SIMDUID_ */ 0, /* OMP_CLAUSE__SIMT_ */ 0, /* OMP_CLAUSE_INDEPENDENT */ 1, /* OMP_CLAUSE_WORKER */ 1, /* OMP_CLAUSE_VECTOR */ 1, /* OMP_CLAUSE_NUM_GANGS */ 1, /* OMP_CLAUSE_NUM_WORKERS */ 1, /* OMP_CLAUSE_VECTOR_LENGTH */ 3, /* OMP_CLAUSE_TILE */ 0, /* OMP_CLAUSE_IF_PRESENT */ 0, /* OMP_CLAUSE_FINALIZE */ }; const char * const omp_clause_code_name[] = { "error_clause", "private", "shared", "firstprivate", "lastprivate", "reduction", "task_reduction", "in_reduction", "copyin", "copyprivate", "linear", "aligned", "allocate", "depend", "nontemporal", "uniform", "to", "link", "from", "to", "map", "use_device_ptr", "use_device_addr", "is_device_ptr", "inclusive", "exclusive", "_cache_", "gang", "async", "wait", "auto", "seq", "_looptemp_", "_reductemp_", "_condtemp_", "_scantemp_", "if", "num_threads", "schedule", "nowait", "ordered", "default", "collapse", "untied", "final", "mergeable", "device", "dist_schedule", "inbranch", "notinbranch", "num_teams", "thread_limit", "proc_bind", "safelen", "simdlen", "device_type", "for", "parallel", "sections", "taskgroup", "priority", "grainsize", "num_tasks", "nogroup", "threads", "simd", "hint", "defaultmap", "order", "bind", "_simduid_", "_simt_", "independent", "worker", "vector", "num_gangs", "num_workers", "vector_length", "tile", "if_present", "finalize", }; /* Return the tree node structure used by tree code CODE. */ static inline enum tree_node_structure_enum tree_node_structure_for_code (enum tree_code code) { switch (TREE_CODE_CLASS (code)) { case tcc_declaration: switch (code) { case CONST_DECL: return TS_CONST_DECL; case DEBUG_EXPR_DECL: return TS_DECL_WRTL; case FIELD_DECL: return TS_FIELD_DECL; case FUNCTION_DECL: return TS_FUNCTION_DECL; case LABEL_DECL: return TS_LABEL_DECL; case PARM_DECL: return TS_PARM_DECL; case RESULT_DECL: return TS_RESULT_DECL; case TRANSLATION_UNIT_DECL: return TS_TRANSLATION_UNIT_DECL; case TYPE_DECL: return TS_TYPE_DECL; case VAR_DECL: return TS_VAR_DECL; default: return TS_DECL_NON_COMMON; } case tcc_type: return TS_TYPE_NON_COMMON; case tcc_binary: case tcc_comparison: case tcc_expression: case tcc_reference: case tcc_statement: case tcc_unary: case tcc_vl_exp: return TS_EXP; default: /* tcc_constant and tcc_exceptional */ break; } switch (code) { /* tcc_constant cases. */ case COMPLEX_CST: return TS_COMPLEX; case FIXED_CST: return TS_FIXED_CST; case INTEGER_CST: return TS_INT_CST; case POLY_INT_CST: return TS_POLY_INT_CST; case REAL_CST: return TS_REAL_CST; case STRING_CST: return TS_STRING; case VECTOR_CST: return TS_VECTOR; case VOID_CST: return TS_TYPED; /* tcc_exceptional cases. */ case BLOCK: return TS_BLOCK; case CONSTRUCTOR: return TS_CONSTRUCTOR; case ERROR_MARK: return TS_COMMON; case IDENTIFIER_NODE: return TS_IDENTIFIER; case OMP_CLAUSE: return TS_OMP_CLAUSE; case OPTIMIZATION_NODE: return TS_OPTIMIZATION; case PLACEHOLDER_EXPR: return TS_COMMON; case SSA_NAME: return TS_SSA_NAME; case STATEMENT_LIST: return TS_STATEMENT_LIST; case TARGET_OPTION_NODE: return TS_TARGET_OPTION; case TREE_BINFO: return TS_BINFO; case TREE_LIST: return TS_LIST; case TREE_VEC: return TS_VEC; default: gcc_unreachable (); } } /* Initialize tree_contains_struct to describe the hierarchy of tree nodes. */ static void initialize_tree_contains_struct (void) { unsigned i; for (i = ERROR_MARK; i < LAST_AND_UNUSED_TREE_CODE; i++) { enum tree_code code; enum tree_node_structure_enum ts_code; code = (enum tree_code) i; ts_code = tree_node_structure_for_code (code); /* Mark the TS structure itself. */ tree_contains_struct[code][ts_code] = 1; /* Mark all the structures that TS is derived from. */ switch (ts_code) { case TS_TYPED: case TS_BLOCK: case TS_OPTIMIZATION: case TS_TARGET_OPTION: MARK_TS_BASE (code); break; case TS_COMMON: case TS_INT_CST: case TS_POLY_INT_CST: case TS_REAL_CST: case TS_FIXED_CST: case TS_VECTOR: case TS_STRING: case TS_COMPLEX: case TS_SSA_NAME: case TS_CONSTRUCTOR: case TS_EXP: case TS_STATEMENT_LIST: MARK_TS_TYPED (code); break; case TS_IDENTIFIER: case TS_DECL_MINIMAL: case TS_TYPE_COMMON: case TS_LIST: case TS_VEC: case TS_BINFO: case TS_OMP_CLAUSE: MARK_TS_COMMON (code); break; case TS_TYPE_WITH_LANG_SPECIFIC: MARK_TS_TYPE_COMMON (code); break; case TS_TYPE_NON_COMMON: MARK_TS_TYPE_WITH_LANG_SPECIFIC (code); break; case TS_DECL_COMMON: MARK_TS_DECL_MINIMAL (code); break; case TS_DECL_WRTL: case TS_CONST_DECL: MARK_TS_DECL_COMMON (code); break; case TS_DECL_NON_COMMON: MARK_TS_DECL_WITH_VIS (code); break; case TS_DECL_WITH_VIS: case TS_PARM_DECL: case TS_LABEL_DECL: case TS_RESULT_DECL: MARK_TS_DECL_WRTL (code); break; case TS_FIELD_DECL: MARK_TS_DECL_COMMON (code); break; case TS_VAR_DECL: MARK_TS_DECL_WITH_VIS (code); break; case TS_TYPE_DECL: case TS_FUNCTION_DECL: MARK_TS_DECL_NON_COMMON (code); break; case TS_TRANSLATION_UNIT_DECL: MARK_TS_DECL_COMMON (code); break; default: gcc_unreachable (); } } /* Basic consistency checks for attributes used in fold. */ gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_NON_COMMON]); gcc_assert (tree_contains_struct[TYPE_DECL][TS_DECL_NON_COMMON]); gcc_assert (tree_contains_struct[CONST_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[VAR_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[PARM_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[RESULT_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[TYPE_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[LABEL_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[FIELD_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[VAR_DECL][TS_DECL_WRTL]); gcc_assert (tree_contains_struct[PARM_DECL][TS_DECL_WRTL]); gcc_assert (tree_contains_struct[RESULT_DECL][TS_DECL_WRTL]); gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_WRTL]); gcc_assert (tree_contains_struct[LABEL_DECL][TS_DECL_WRTL]); gcc_assert (tree_contains_struct[CONST_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[VAR_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[PARM_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[RESULT_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[TYPE_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[TRANSLATION_UNIT_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[LABEL_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[FIELD_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[VAR_DECL][TS_DECL_WITH_VIS]); gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_DECL_WITH_VIS]); gcc_assert (tree_contains_struct[TYPE_DECL][TS_DECL_WITH_VIS]); gcc_assert (tree_contains_struct[VAR_DECL][TS_VAR_DECL]); gcc_assert (tree_contains_struct[FIELD_DECL][TS_FIELD_DECL]); gcc_assert (tree_contains_struct[PARM_DECL][TS_PARM_DECL]); gcc_assert (tree_contains_struct[LABEL_DECL][TS_LABEL_DECL]); gcc_assert (tree_contains_struct[RESULT_DECL][TS_RESULT_DECL]); gcc_assert (tree_contains_struct[CONST_DECL][TS_CONST_DECL]); gcc_assert (tree_contains_struct[TYPE_DECL][TS_TYPE_DECL]); gcc_assert (tree_contains_struct[FUNCTION_DECL][TS_FUNCTION_DECL]); gcc_assert (tree_contains_struct[IMPORTED_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[IMPORTED_DECL][TS_DECL_COMMON]); gcc_assert (tree_contains_struct[NAMELIST_DECL][TS_DECL_MINIMAL]); gcc_assert (tree_contains_struct[NAMELIST_DECL][TS_DECL_COMMON]); } /* Init tree.c. */ void init_ttree (void) { /* Initialize the hash table of types. */ type_hash_table = hash_table::create_ggc (TYPE_HASH_INITIAL_SIZE); debug_expr_for_decl = hash_table::create_ggc (512); value_expr_for_decl = hash_table::create_ggc (512); int_cst_hash_table = hash_table::create_ggc (1024); poly_int_cst_hash_table = hash_table::create_ggc (64); int_cst_node = make_int_cst (1, 1); cl_option_hash_table = hash_table::create_ggc (64); cl_optimization_node = make_node (OPTIMIZATION_NODE); cl_target_option_node = make_node (TARGET_OPTION_NODE); /* Initialize the tree_contains_struct array. */ initialize_tree_contains_struct (); lang_hooks.init_ts (); } /* The name of the object as the assembler will see it (but before any translations made by ASM_OUTPUT_LABELREF). Often this is the same as DECL_NAME. It is an IDENTIFIER_NODE. */ tree decl_assembler_name (tree decl) { if (!DECL_ASSEMBLER_NAME_SET_P (decl)) lang_hooks.set_decl_assembler_name (decl); return DECL_ASSEMBLER_NAME_RAW (decl); } /* The DECL_ASSEMBLER_NAME_RAW of DECL is being explicitly set to NAME (either of which may be NULL). Inform the FE, if this changes the name. */ void overwrite_decl_assembler_name (tree decl, tree name) { if (DECL_ASSEMBLER_NAME_RAW (decl) != name) lang_hooks.overwrite_decl_assembler_name (decl, name); } /* When the target supports COMDAT groups, this indicates which group the DECL is associated with. This can be either an IDENTIFIER_NODE or a decl, in which case its DECL_ASSEMBLER_NAME identifies the group. */ tree decl_comdat_group (const_tree node) { struct symtab_node *snode = symtab_node::get (node); if (!snode) return NULL; return snode->get_comdat_group (); } /* Likewise, but make sure it's been reduced to an IDENTIFIER_NODE. */ tree decl_comdat_group_id (const_tree node) { struct symtab_node *snode = symtab_node::get (node); if (!snode) return NULL; return snode->get_comdat_group_id (); } /* When the target supports named section, return its name as IDENTIFIER_NODE or NULL if it is in no section. */ const char * decl_section_name (const_tree node) { struct symtab_node *snode = symtab_node::get (node); if (!snode) return NULL; return snode->get_section (); } /* Set section name of NODE to VALUE (that is expected to be identifier node) */ void set_decl_section_name (tree node, const char *value) { struct symtab_node *snode; if (value == NULL) { snode = symtab_node::get (node); if (!snode) return; } else if (VAR_P (node)) snode = varpool_node::get_create (node); else snode = cgraph_node::get_create (node); snode->set_section (value); } /* Set section name of NODE to match the section name of OTHER. set_decl_section_name (decl, other) is equivalent to set_decl_section_name (decl, DECL_SECTION_NAME (other)), but possibly more efficient. */ void set_decl_section_name (tree decl, const_tree other) { struct symtab_node *other_node = symtab_node::get (other); if (other_node) { struct symtab_node *decl_node; if (VAR_P (decl)) decl_node = varpool_node::get_create (decl); else decl_node = cgraph_node::get_create (decl); decl_node->set_section (*other_node); } else { struct symtab_node *decl_node = symtab_node::get (decl); if (!decl_node) return; decl_node->set_section (NULL); } } /* Return TLS model of a variable NODE. */ enum tls_model decl_tls_model (const_tree node) { struct varpool_node *snode = varpool_node::get (node); if (!snode) return TLS_MODEL_NONE; return snode->tls_model; } /* Set TLS model of variable NODE to MODEL. */ void set_decl_tls_model (tree node, enum tls_model model) { struct varpool_node *vnode; if (model == TLS_MODEL_NONE) { vnode = varpool_node::get (node); if (!vnode) return; } else vnode = varpool_node::get_create (node); vnode->tls_model = model; } /* Compute the number of bytes occupied by a tree with code CODE. This function cannot be used for nodes that have variable sizes, including TREE_VEC, INTEGER_CST, STRING_CST, and CALL_EXPR. */ size_t tree_code_size (enum tree_code code) { switch (TREE_CODE_CLASS (code)) { case tcc_declaration: /* A decl node */ switch (code) { case FIELD_DECL: return sizeof (tree_field_decl); case PARM_DECL: return sizeof (tree_parm_decl); case VAR_DECL: return sizeof (tree_var_decl); case LABEL_DECL: return sizeof (tree_label_decl); case RESULT_DECL: return sizeof (tree_result_decl); case CONST_DECL: return sizeof (tree_const_decl); case TYPE_DECL: return sizeof (tree_type_decl); case FUNCTION_DECL: return sizeof (tree_function_decl); case DEBUG_EXPR_DECL: return sizeof (tree_decl_with_rtl); case TRANSLATION_UNIT_DECL: return sizeof (tree_translation_unit_decl); case NAMESPACE_DECL: case IMPORTED_DECL: case NAMELIST_DECL: return sizeof (tree_decl_non_common); default: gcc_checking_assert (code >= NUM_TREE_CODES); return lang_hooks.tree_size (code); } case tcc_type: /* a type node */ switch (code) { case OFFSET_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE: case INTEGER_TYPE: case REAL_TYPE: case OPAQUE_TYPE: case POINTER_TYPE: case REFERENCE_TYPE: case NULLPTR_TYPE: case FIXED_POINT_TYPE: case COMPLEX_TYPE: case VECTOR_TYPE: case ARRAY_TYPE: case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: case VOID_TYPE: case FUNCTION_TYPE: case METHOD_TYPE: case LANG_TYPE: return sizeof (tree_type_non_common); default: gcc_checking_assert (code >= NUM_TREE_CODES); return lang_hooks.tree_size (code); } case tcc_reference: /* a reference */ case tcc_expression: /* an expression */ case tcc_statement: /* an expression with side effects */ case tcc_comparison: /* a comparison expression */ case tcc_unary: /* a unary arithmetic expression */ case tcc_binary: /* a binary arithmetic expression */ return (sizeof (struct tree_exp) + (TREE_CODE_LENGTH (code) - 1) * sizeof (tree)); case tcc_constant: /* a constant */ switch (code) { case VOID_CST: return sizeof (tree_typed); case INTEGER_CST: gcc_unreachable (); case POLY_INT_CST: return sizeof (tree_poly_int_cst); case REAL_CST: return sizeof (tree_real_cst); case FIXED_CST: return sizeof (tree_fixed_cst); case COMPLEX_CST: return sizeof (tree_complex); case VECTOR_CST: gcc_unreachable (); case STRING_CST: gcc_unreachable (); default: gcc_checking_assert (code >= NUM_TREE_CODES); return lang_hooks.tree_size (code); } case tcc_exceptional: /* something random, like an identifier. */ switch (code) { case IDENTIFIER_NODE: return lang_hooks.identifier_size; case TREE_LIST: return sizeof (tree_list); case ERROR_MARK: case PLACEHOLDER_EXPR: return sizeof (tree_common); case TREE_VEC: gcc_unreachable (); case OMP_CLAUSE: gcc_unreachable (); case SSA_NAME: return sizeof (tree_ssa_name); case STATEMENT_LIST: return sizeof (tree_statement_list); case BLOCK: return sizeof (struct tree_block); case CONSTRUCTOR: return sizeof (tree_constructor); case OPTIMIZATION_NODE: return sizeof (tree_optimization_option); case TARGET_OPTION_NODE: return sizeof (tree_target_option); default: gcc_checking_assert (code >= NUM_TREE_CODES); return lang_hooks.tree_size (code); } default: gcc_unreachable (); } } /* Compute the number of bytes occupied by NODE. This routine only looks at TREE_CODE, except for those nodes that have variable sizes. */ size_t tree_size (const_tree node) { const enum tree_code code = TREE_CODE (node); switch (code) { case INTEGER_CST: return (sizeof (struct tree_int_cst) + (TREE_INT_CST_EXT_NUNITS (node) - 1) * sizeof (HOST_WIDE_INT)); case TREE_BINFO: return (offsetof (struct tree_binfo, base_binfos) + vec ::embedded_size (BINFO_N_BASE_BINFOS (node))); case TREE_VEC: return (sizeof (struct tree_vec) + (TREE_VEC_LENGTH (node) - 1) * sizeof (tree)); case VECTOR_CST: return (sizeof (struct tree_vector) + (vector_cst_encoded_nelts (node) - 1) * sizeof (tree)); case STRING_CST: return TREE_STRING_LENGTH (node) + offsetof (struct tree_string, str) + 1; case OMP_CLAUSE: return (sizeof (struct tree_omp_clause) + (omp_clause_num_ops[OMP_CLAUSE_CODE (node)] - 1) * sizeof (tree)); default: if (TREE_CODE_CLASS (code) == tcc_vl_exp) return (sizeof (struct tree_exp) + (VL_EXP_OPERAND_LENGTH (node) - 1) * sizeof (tree)); else return tree_code_size (code); } } /* Return tree node kind based on tree CODE. */ static tree_node_kind get_stats_node_kind (enum tree_code code) { enum tree_code_class type = TREE_CODE_CLASS (code); switch (type) { case tcc_declaration: /* A decl node */ return d_kind; case tcc_type: /* a type node */ return t_kind; case tcc_statement: /* an expression with side effects */ return s_kind; case tcc_reference: /* a reference */ return r_kind; case tcc_expression: /* an expression */ case tcc_comparison: /* a comparison expression */ case tcc_unary: /* a unary arithmetic expression */ case tcc_binary: /* a binary arithmetic expression */ return e_kind; case tcc_constant: /* a constant */ return c_kind; case tcc_exceptional: /* something random, like an identifier. */ switch (code) { case IDENTIFIER_NODE: return id_kind; case TREE_VEC: return vec_kind; case TREE_BINFO: return binfo_kind; case SSA_NAME: return ssa_name_kind; case BLOCK: return b_kind; case CONSTRUCTOR: return constr_kind; case OMP_CLAUSE: return omp_clause_kind; default: return x_kind; } break; case tcc_vl_exp: return e_kind; default: gcc_unreachable (); } } /* Record interesting allocation statistics for a tree node with CODE and LENGTH. */ static void record_node_allocation_statistics (enum tree_code code, size_t length) { if (!GATHER_STATISTICS) return; tree_node_kind kind = get_stats_node_kind (code); tree_code_counts[(int) code]++; tree_node_counts[(int) kind]++; tree_node_sizes[(int) kind] += length; } /* Allocate and return a new UID from the DECL_UID namespace. */ int allocate_decl_uid (void) { return next_decl_uid++; } /* Return a newly allocated node of code CODE. For decl and type nodes, some other fields are initialized. The rest of the node is initialized to zero. This function cannot be used for TREE_VEC, INTEGER_CST or OMP_CLAUSE nodes, which is enforced by asserts in tree_code_size. Achoo! I got a code in the node. */ tree make_node (enum tree_code code MEM_STAT_DECL) { tree t; enum tree_code_class type = TREE_CODE_CLASS (code); size_t length = tree_code_size (code); record_node_allocation_statistics (code, length); t = ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT); TREE_SET_CODE (t, code); switch (type) { case tcc_statement: if (code != DEBUG_BEGIN_STMT) TREE_SIDE_EFFECTS (t) = 1; break; case tcc_declaration: if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON)) { if (code == FUNCTION_DECL) { SET_DECL_ALIGN (t, FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY)); SET_DECL_MODE (t, FUNCTION_MODE); } else SET_DECL_ALIGN (t, 1); } DECL_SOURCE_LOCATION (t) = input_location; if (TREE_CODE (t) == DEBUG_EXPR_DECL) DECL_UID (t) = --next_debug_decl_uid; else { DECL_UID (t) = allocate_decl_uid (); SET_DECL_PT_UID (t, -1); } if (TREE_CODE (t) == LABEL_DECL) LABEL_DECL_UID (t) = -1; break; case tcc_type: TYPE_UID (t) = next_type_uid++; SET_TYPE_ALIGN (t, BITS_PER_UNIT); TYPE_USER_ALIGN (t) = 0; TYPE_MAIN_VARIANT (t) = t; TYPE_CANONICAL (t) = t; /* Default to no attributes for type, but let target change that. */ TYPE_ATTRIBUTES (t) = NULL_TREE; targetm.set_default_type_attributes (t); /* We have not yet computed the alias set for this type. */ TYPE_ALIAS_SET (t) = -1; break; case tcc_constant: TREE_CONSTANT (t) = 1; break; case tcc_expression: switch (code) { case INIT_EXPR: case MODIFY_EXPR: case VA_ARG_EXPR: case PREDECREMENT_EXPR: case PREINCREMENT_EXPR: case POSTDECREMENT_EXPR: case POSTINCREMENT_EXPR: /* All of these have side-effects, no matter what their operands are. */ TREE_SIDE_EFFECTS (t) = 1; break; default: break; } break; case tcc_exceptional: switch (code) { case TARGET_OPTION_NODE: TREE_TARGET_OPTION(t) = ggc_cleared_alloc (); break; case OPTIMIZATION_NODE: TREE_OPTIMIZATION (t) = ggc_cleared_alloc (); break; default: break; } break; default: /* Other classes need no special treatment. */ break; } return t; } /* Free tree node. */ void free_node (tree node) { enum tree_code code = TREE_CODE (node); if (GATHER_STATISTICS) { enum tree_node_kind kind = get_stats_node_kind (code); gcc_checking_assert (tree_code_counts[(int) TREE_CODE (node)] != 0); gcc_checking_assert (tree_node_counts[(int) kind] != 0); gcc_checking_assert (tree_node_sizes[(int) kind] >= tree_size (node)); tree_code_counts[(int) TREE_CODE (node)]--; tree_node_counts[(int) kind]--; tree_node_sizes[(int) kind] -= tree_size (node); } if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR)) vec_free (CONSTRUCTOR_ELTS (node)); else if (code == BLOCK) vec_free (BLOCK_NONLOCALIZED_VARS (node)); else if (code == TREE_BINFO) vec_free (BINFO_BASE_ACCESSES (node)); else if (code == OPTIMIZATION_NODE) cl_optimization_option_free (TREE_OPTIMIZATION (node)); else if (code == TARGET_OPTION_NODE) cl_target_option_free (TREE_TARGET_OPTION (node)); ggc_free (node); } /* Return a new node with the same contents as NODE except that its TREE_CHAIN, if it has one, is zero and it has a fresh uid. */ tree copy_node (tree node MEM_STAT_DECL) { tree t; enum tree_code code = TREE_CODE (node); size_t length; gcc_assert (code != STATEMENT_LIST); length = tree_size (node); record_node_allocation_statistics (code, length); t = ggc_alloc_tree_node_stat (length PASS_MEM_STAT); memcpy (t, node, length); if (CODE_CONTAINS_STRUCT (code, TS_COMMON)) TREE_CHAIN (t) = 0; TREE_ASM_WRITTEN (t) = 0; TREE_VISITED (t) = 0; if (TREE_CODE_CLASS (code) == tcc_declaration) { if (code == DEBUG_EXPR_DECL) DECL_UID (t) = --next_debug_decl_uid; else { DECL_UID (t) = allocate_decl_uid (); if (DECL_PT_UID_SET_P (node)) SET_DECL_PT_UID (t, DECL_PT_UID (node)); } if ((TREE_CODE (node) == PARM_DECL || VAR_P (node)) && DECL_HAS_VALUE_EXPR_P (node)) { SET_DECL_VALUE_EXPR (t, DECL_VALUE_EXPR (node)); DECL_HAS_VALUE_EXPR_P (t) = 1; } /* DECL_DEBUG_EXPR is copied explicitly by callers. */ if (VAR_P (node)) { DECL_HAS_DEBUG_EXPR_P (t) = 0; t->decl_with_vis.symtab_node = NULL; } if (VAR_P (node) && DECL_HAS_INIT_PRIORITY_P (node)) { SET_DECL_INIT_PRIORITY (t, DECL_INIT_PRIORITY (node)); DECL_HAS_INIT_PRIORITY_P (t) = 1; } if (TREE_CODE (node) == FUNCTION_DECL) { DECL_STRUCT_FUNCTION (t) = NULL; t->decl_with_vis.symtab_node = NULL; } } else if (TREE_CODE_CLASS (code) == tcc_type) { TYPE_UID (t) = next_type_uid++; /* The following is so that the debug code for the copy is different from the original type. The two statements usually duplicate each other (because they clear fields of the same union), but the optimizer should catch that. */ TYPE_SYMTAB_ADDRESS (t) = 0; TYPE_SYMTAB_DIE (t) = 0; /* Do not copy the values cache. */ if (TYPE_CACHED_VALUES_P (t)) { TYPE_CACHED_VALUES_P (t) = 0; TYPE_CACHED_VALUES (t) = NULL_TREE; } } else if (code == TARGET_OPTION_NODE) { TREE_TARGET_OPTION (t) = ggc_alloc(); memcpy (TREE_TARGET_OPTION (t), TREE_TARGET_OPTION (node), sizeof (struct cl_target_option)); } else if (code == OPTIMIZATION_NODE) { TREE_OPTIMIZATION (t) = ggc_alloc(); memcpy (TREE_OPTIMIZATION (t), TREE_OPTIMIZATION (node), sizeof (struct cl_optimization)); } return t; } /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field. For example, this can copy a list made of TREE_LIST nodes. */ tree copy_list (tree list) { tree head; tree prev, next; if (list == 0) return 0; head = prev = copy_node (list); next = TREE_CHAIN (list); while (next) { TREE_CHAIN (prev) = copy_node (next); prev = TREE_CHAIN (prev); next = TREE_CHAIN (next); } return head; } /* Return the value that TREE_INT_CST_EXT_NUNITS should have for an INTEGER_CST with value CST and type TYPE. */ static unsigned int get_int_cst_ext_nunits (tree type, const wide_int &cst) { gcc_checking_assert (cst.get_precision () == TYPE_PRECISION (type)); /* We need extra HWIs if CST is an unsigned integer with its upper bit set. */ if (TYPE_UNSIGNED (type) && wi::neg_p (cst)) return cst.get_precision () / HOST_BITS_PER_WIDE_INT + 1; return cst.get_len (); } /* Return a new INTEGER_CST with value CST and type TYPE. */ static tree build_new_int_cst (tree type, const wide_int &cst) { unsigned int len = cst.get_len (); unsigned int ext_len = get_int_cst_ext_nunits (type, cst); tree nt = make_int_cst (len, ext_len); if (len < ext_len) { --ext_len; TREE_INT_CST_ELT (nt, ext_len) = zext_hwi (-1, cst.get_precision () % HOST_BITS_PER_WIDE_INT); for (unsigned int i = len; i < ext_len; ++i) TREE_INT_CST_ELT (nt, i) = -1; } else if (TYPE_UNSIGNED (type) && cst.get_precision () < len * HOST_BITS_PER_WIDE_INT) { len--; TREE_INT_CST_ELT (nt, len) = zext_hwi (cst.elt (len), cst.get_precision () % HOST_BITS_PER_WIDE_INT); } for (unsigned int i = 0; i < len; i++) TREE_INT_CST_ELT (nt, i) = cst.elt (i); TREE_TYPE (nt) = type; return nt; } /* Return a new POLY_INT_CST with coefficients COEFFS and type TYPE. */ static tree build_new_poly_int_cst (tree type, tree (&coeffs)[NUM_POLY_INT_COEFFS] CXX_MEM_STAT_INFO) { size_t length = sizeof (struct tree_poly_int_cst); record_node_allocation_statistics (POLY_INT_CST, length); tree t = ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT); TREE_SET_CODE (t, POLY_INT_CST); TREE_CONSTANT (t) = 1; TREE_TYPE (t) = type; for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) POLY_INT_CST_COEFF (t, i) = coeffs[i]; return t; } /* Create a constant tree that contains CST sign-extended to TYPE. */ tree build_int_cst (tree type, poly_int64 cst) { /* Support legacy code. */ if (!type) type = integer_type_node; return wide_int_to_tree (type, wi::shwi (cst, TYPE_PRECISION (type))); } /* Create a constant tree that contains CST zero-extended to TYPE. */ tree build_int_cstu (tree type, poly_uint64 cst) { return wide_int_to_tree (type, wi::uhwi (cst, TYPE_PRECISION (type))); } /* Create a constant tree that contains CST sign-extended to TYPE. */ tree build_int_cst_type (tree type, poly_int64 cst) { gcc_assert (type); return wide_int_to_tree (type, wi::shwi (cst, TYPE_PRECISION (type))); } /* Constructs tree in type TYPE from with value given by CST. Signedness of CST is assumed to be the same as the signedness of TYPE. */ tree double_int_to_tree (tree type, double_int cst) { return wide_int_to_tree (type, widest_int::from (cst, TYPE_SIGN (type))); } /* We force the wide_int CST to the range of the type TYPE by sign or zero extending it. OVERFLOWABLE indicates if we are interested in overflow of the value, when >0 we are only interested in signed overflow, for <0 we are interested in any overflow. OVERFLOWED indicates whether overflow has already occurred. CONST_OVERFLOWED indicates whether constant overflow has already occurred. We force T's value to be within range of T's type (by setting to 0 or 1 all the bits outside the type's range). We set TREE_OVERFLOWED if, OVERFLOWED is nonzero, or OVERFLOWABLE is >0 and signed overflow occurs or OVERFLOWABLE is <0 and any overflow occurs We return a new tree node for the extended wide_int. The node is shared if no overflow flags are set. */ tree force_fit_type (tree type, const poly_wide_int_ref &cst, int overflowable, bool overflowed) { signop sign = TYPE_SIGN (type); /* If we need to set overflow flags, return a new unshared node. */ if (overflowed || !wi::fits_to_tree_p (cst, type)) { if (overflowed || overflowable < 0 || (overflowable > 0 && sign == SIGNED)) { poly_wide_int tmp = poly_wide_int::from (cst, TYPE_PRECISION (type), sign); tree t; if (tmp.is_constant ()) t = build_new_int_cst (type, tmp.coeffs[0]); else { tree coeffs[NUM_POLY_INT_COEFFS]; for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) { coeffs[i] = build_new_int_cst (type, tmp.coeffs[i]); TREE_OVERFLOW (coeffs[i]) = 1; } t = build_new_poly_int_cst (type, coeffs); } TREE_OVERFLOW (t) = 1; return t; } } /* Else build a shared node. */ return wide_int_to_tree (type, cst); } /* These are the hash table functions for the hash table of INTEGER_CST nodes of a sizetype. */ /* Return the hash code X, an INTEGER_CST. */ hashval_t int_cst_hasher::hash (tree x) { const_tree const t = x; hashval_t code = TYPE_UID (TREE_TYPE (t)); int i; for (i = 0; i < TREE_INT_CST_NUNITS (t); i++) code = iterative_hash_host_wide_int (TREE_INT_CST_ELT(t, i), code); return code; } /* Return nonzero if the value represented by *X (an INTEGER_CST tree node) is the same as that given by *Y, which is the same. */ bool int_cst_hasher::equal (tree x, tree y) { const_tree const xt = x; const_tree const yt = y; if (TREE_TYPE (xt) != TREE_TYPE (yt) || TREE_INT_CST_NUNITS (xt) != TREE_INT_CST_NUNITS (yt) || TREE_INT_CST_EXT_NUNITS (xt) != TREE_INT_CST_EXT_NUNITS (yt)) return false; for (int i = 0; i < TREE_INT_CST_NUNITS (xt); i++) if (TREE_INT_CST_ELT (xt, i) != TREE_INT_CST_ELT (yt, i)) return false; return true; } /* Cache wide_int CST into the TYPE_CACHED_VALUES cache for TYPE. SLOT is the slot entry to store it in, and MAX_SLOTS is the maximum number of slots that can be cached for the type. */ static inline tree cache_wide_int_in_type_cache (tree type, const wide_int &cst, int slot, int max_slots) { gcc_checking_assert (slot >= 0); /* Initialize cache. */ if (!TYPE_CACHED_VALUES_P (type)) { TYPE_CACHED_VALUES_P (type) = 1; TYPE_CACHED_VALUES (type) = make_tree_vec (max_slots); } tree t = TREE_VEC_ELT (TYPE_CACHED_VALUES (type), slot); if (!t) { /* Create a new shared int. */ t = build_new_int_cst (type, cst); TREE_VEC_ELT (TYPE_CACHED_VALUES (type), slot) = t; } return t; } /* Create an INT_CST node of TYPE and value CST. The returned node is always shared. For small integers we use a per-type vector cache, for larger ones we use a single hash table. The value is extended from its precision according to the sign of the type to be a multiple of HOST_BITS_PER_WIDE_INT. This defines the upper bits and ensures that hashing and value equality based upon the underlying HOST_WIDE_INTs works without masking. */ static tree wide_int_to_tree_1 (tree type, const wide_int_ref &pcst) { tree t; int ix = -1; int limit = 0; gcc_assert (type); unsigned int prec = TYPE_PRECISION (type); signop sgn = TYPE_SIGN (type); /* Verify that everything is canonical. */ int l = pcst.get_len (); if (l > 1) { if (pcst.elt (l - 1) == 0) gcc_checking_assert (pcst.elt (l - 2) < 0); if (pcst.elt (l - 1) == HOST_WIDE_INT_M1) gcc_checking_assert (pcst.elt (l - 2) >= 0); } wide_int cst = wide_int::from (pcst, prec, sgn); unsigned int ext_len = get_int_cst_ext_nunits (type, cst); enum tree_code code = TREE_CODE (type); if (code == POINTER_TYPE || code == REFERENCE_TYPE) { /* Cache NULL pointer and zero bounds. */ if (cst == 0) ix = 0; /* Cache upper bounds of pointers. */ else if (cst == wi::max_value (prec, sgn)) ix = 1; /* Cache 1 which is used for a non-zero range. */ else if (cst == 1) ix = 2; if (ix >= 0) { t = cache_wide_int_in_type_cache (type, cst, ix, 3); /* Make sure no one is clobbering the shared constant. */ gcc_checking_assert (TREE_TYPE (t) == type && cst == wi::to_wide (t)); return t; } } if (ext_len == 1) { /* We just need to store a single HOST_WIDE_INT. */ HOST_WIDE_INT hwi; if (TYPE_UNSIGNED (type)) hwi = cst.to_uhwi (); else hwi = cst.to_shwi (); switch (code) { case NULLPTR_TYPE: gcc_assert (hwi == 0); /* Fallthru. */ case POINTER_TYPE: case REFERENCE_TYPE: /* Ignore pointers, as they were already handled above. */ break; case BOOLEAN_TYPE: /* Cache false or true. */ limit = 2; if (IN_RANGE (hwi, 0, 1)) ix = hwi; break; case INTEGER_TYPE: case OFFSET_TYPE: if (TYPE_SIGN (type) == UNSIGNED) { /* Cache [0, N). */ limit = param_integer_share_limit; if (IN_RANGE (hwi, 0, param_integer_share_limit - 1)) ix = hwi; } else { /* Cache [-1, N). */ limit = param_integer_share_limit + 1; if (IN_RANGE (hwi, -1, param_integer_share_limit - 1)) ix = hwi + 1; } break; case ENUMERAL_TYPE: break; default: gcc_unreachable (); } if (ix >= 0) { t = cache_wide_int_in_type_cache (type, cst, ix, limit); /* Make sure no one is clobbering the shared constant. */ gcc_checking_assert (TREE_TYPE (t) == type && TREE_INT_CST_NUNITS (t) == 1 && TREE_INT_CST_OFFSET_NUNITS (t) == 1 && TREE_INT_CST_EXT_NUNITS (t) == 1 && TREE_INT_CST_ELT (t, 0) == hwi); return t; } else { /* Use the cache of larger shared ints, using int_cst_node as a temporary. */ TREE_INT_CST_ELT (int_cst_node, 0) = hwi; TREE_TYPE (int_cst_node) = type; tree *slot = int_cst_hash_table->find_slot (int_cst_node, INSERT); t = *slot; if (!t) { /* Insert this one into the hash table. */ t = int_cst_node; *slot = t; /* Make a new node for next time round. */ int_cst_node = make_int_cst (1, 1); } } } else { /* The value either hashes properly or we drop it on the floor for the gc to take care of. There will not be enough of them to worry about. */ tree nt = build_new_int_cst (type, cst); tree *slot = int_cst_hash_table->find_slot (nt, INSERT); t = *slot; if (!t) { /* Insert this one into the hash table. */ t = nt; *slot = t; } else ggc_free (nt); } return t; } hashval_t poly_int_cst_hasher::hash (tree t) { inchash::hash hstate; hstate.add_int (TYPE_UID (TREE_TYPE (t))); for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) hstate.add_wide_int (wi::to_wide (POLY_INT_CST_COEFF (t, i))); return hstate.end (); } bool poly_int_cst_hasher::equal (tree x, const compare_type &y) { if (TREE_TYPE (x) != y.first) return false; for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) if (wi::to_wide (POLY_INT_CST_COEFF (x, i)) != y.second->coeffs[i]) return false; return true; } /* Build a POLY_INT_CST node with type TYPE and with the elements in VALUES. The elements must also have type TYPE. */ tree build_poly_int_cst (tree type, const poly_wide_int_ref &values) { unsigned int prec = TYPE_PRECISION (type); gcc_assert (prec <= values.coeffs[0].get_precision ()); poly_wide_int c = poly_wide_int::from (values, prec, SIGNED); inchash::hash h; h.add_int (TYPE_UID (type)); for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) h.add_wide_int (c.coeffs[i]); poly_int_cst_hasher::compare_type comp (type, &c); tree *slot = poly_int_cst_hash_table->find_slot_with_hash (comp, h.end (), INSERT); if (*slot == NULL_TREE) { tree coeffs[NUM_POLY_INT_COEFFS]; for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) coeffs[i] = wide_int_to_tree_1 (type, c.coeffs[i]); *slot = build_new_poly_int_cst (type, coeffs); } return *slot; } /* Create a constant tree with value VALUE in type TYPE. */ tree wide_int_to_tree (tree type, const poly_wide_int_ref &value) { if (value.is_constant ()) return wide_int_to_tree_1 (type, value.coeffs[0]); return build_poly_int_cst (type, value); } /* Insert INTEGER_CST T into a cache of integer constants. And return the cached constant (which may or may not be T). If MIGHT_DUPLICATE is false, and T falls into the type's 'smaller values' range, there cannot be an existing entry. Otherwise, if MIGHT_DUPLICATE is true, or the value is large, should an existing entry exist, it is returned (rather than inserting T). */ tree cache_integer_cst (tree t, bool might_duplicate ATTRIBUTE_UNUSED) { tree type = TREE_TYPE (t); int ix = -1; int limit = 0; int prec = TYPE_PRECISION (type); gcc_assert (!TREE_OVERFLOW (t)); /* The caching indices here must match those in wide_int_to_type_1. */ switch (TREE_CODE (type)) { case NULLPTR_TYPE: gcc_checking_assert (integer_zerop (t)); /* Fallthru. */ case POINTER_TYPE: case REFERENCE_TYPE: { if (integer_zerop (t)) ix = 0; else if (integer_onep (t)) ix = 2; if (ix >= 0) limit = 3; } break; case BOOLEAN_TYPE: /* Cache false or true. */ limit = 2; if (wi::ltu_p (wi::to_wide (t), 2)) ix = TREE_INT_CST_ELT (t, 0); break; case INTEGER_TYPE: case OFFSET_TYPE: if (TYPE_UNSIGNED (type)) { /* Cache 0..N */ limit = param_integer_share_limit; /* This is a little hokie, but if the prec is smaller than what is necessary to hold param_integer_share_limit, then the obvious test will not get the correct answer. */ if (prec < HOST_BITS_PER_WIDE_INT) { if (tree_to_uhwi (t) < (unsigned HOST_WIDE_INT) param_integer_share_limit) ix = tree_to_uhwi (t); } else if (wi::ltu_p (wi::to_wide (t), param_integer_share_limit)) ix = tree_to_uhwi (t); } else { /* Cache -1..N */ limit = param_integer_share_limit + 1; if (integer_minus_onep (t)) ix = 0; else if (!wi::neg_p (wi::to_wide (t))) { if (prec < HOST_BITS_PER_WIDE_INT) { if (tree_to_shwi (t) < param_integer_share_limit) ix = tree_to_shwi (t) + 1; } else if (wi::ltu_p (wi::to_wide (t), param_integer_share_limit)) ix = tree_to_shwi (t) + 1; } } break; case ENUMERAL_TYPE: /* The slot used by TYPE_CACHED_VALUES is used for the enum members. */ break; default: gcc_unreachable (); } if (ix >= 0) { /* Look for it in the type's vector of small shared ints. */ if (!TYPE_CACHED_VALUES_P (type)) { TYPE_CACHED_VALUES_P (type) = 1; TYPE_CACHED_VALUES (type) = make_tree_vec (limit); } if (tree r = TREE_VEC_ELT (TYPE_CACHED_VALUES (type), ix)) { gcc_checking_assert (might_duplicate); t = r; } else TREE_VEC_ELT (TYPE_CACHED_VALUES (type), ix) = t; } else { /* Use the cache of larger shared ints. */ tree *slot = int_cst_hash_table->find_slot (t, INSERT); if (tree r = *slot) { /* If there is already an entry for the number verify it's the same value. */ gcc_checking_assert (wi::to_wide (tree (r)) == wi::to_wide (t)); /* And return the cached value. */ t = r; } else /* Otherwise insert this one into the hash table. */ *slot = t; } return t; } /* Builds an integer constant in TYPE such that lowest BITS bits are ones and the rest are zeros. */ tree build_low_bits_mask (tree type, unsigned bits) { gcc_assert (bits <= TYPE_PRECISION (type)); return wide_int_to_tree (type, wi::mask (bits, false, TYPE_PRECISION (type))); } /* Checks that X is integer constant that can be expressed in (unsigned) HOST_WIDE_INT without loss of precision. */ bool cst_and_fits_in_hwi (const_tree x) { return (TREE_CODE (x) == INTEGER_CST && (tree_fits_shwi_p (x) || tree_fits_uhwi_p (x))); } /* Build a newly constructed VECTOR_CST with the given values of (VECTOR_CST_)LOG2_NPATTERNS and (VECTOR_CST_)NELTS_PER_PATTERN. */ tree make_vector (unsigned log2_npatterns, unsigned int nelts_per_pattern MEM_STAT_DECL) { gcc_assert (IN_RANGE (nelts_per_pattern, 1, 3)); tree t; unsigned npatterns = 1 << log2_npatterns; unsigned encoded_nelts = npatterns * nelts_per_pattern; unsigned length = (sizeof (struct tree_vector) + (encoded_nelts - 1) * sizeof (tree)); record_node_allocation_statistics (VECTOR_CST, length); t = ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT); TREE_SET_CODE (t, VECTOR_CST); TREE_CONSTANT (t) = 1; VECTOR_CST_LOG2_NPATTERNS (t) = log2_npatterns; VECTOR_CST_NELTS_PER_PATTERN (t) = nelts_per_pattern; return t; } /* Return a new VECTOR_CST node whose type is TYPE and whose values are extracted from V, a vector of CONSTRUCTOR_ELT. */ tree build_vector_from_ctor (tree type, vec *v) { if (vec_safe_length (v) == 0) return build_zero_cst (type); unsigned HOST_WIDE_INT idx, nelts; tree value; /* We can't construct a VECTOR_CST for a variable number of elements. */ nelts = TYPE_VECTOR_SUBPARTS (type).to_constant (); tree_vector_builder vec (type, nelts, 1); FOR_EACH_CONSTRUCTOR_VALUE (v, idx, value) { if (TREE_CODE (value) == VECTOR_CST) { /* If NELTS is constant then this must be too. */ unsigned int sub_nelts = VECTOR_CST_NELTS (value).to_constant (); for (unsigned i = 0; i < sub_nelts; ++i) vec.quick_push (VECTOR_CST_ELT (value, i)); } else vec.quick_push (value); } while (vec.length () < nelts) vec.quick_push (build_zero_cst (TREE_TYPE (type))); return vec.build (); } /* Build a vector of type VECTYPE where all the elements are SCs. */ tree build_vector_from_val (tree vectype, tree sc) { unsigned HOST_WIDE_INT i, nunits; if (sc == error_mark_node) return sc; /* Verify that the vector type is suitable for SC. Note that there is some inconsistency in the type-system with respect to restrict qualifications of pointers. Vector types always have a main-variant element type and the qualification is applied to the vector-type. So TREE_TYPE (vector-type) does not return a properly qualified vector element-type. */ gcc_checking_assert (types_compatible_p (TYPE_MAIN_VARIANT (TREE_TYPE (sc)), TREE_TYPE (vectype))); if (CONSTANT_CLASS_P (sc)) { tree_vector_builder v (vectype, 1, 1); v.quick_push (sc); return v.build (); } else if (!TYPE_VECTOR_SUBPARTS (vectype).is_constant (&nunits)) return fold_build1 (VEC_DUPLICATE_EXPR, vectype, sc); else { vec *v; vec_alloc (v, nunits); for (i = 0; i < nunits; ++i) CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, sc); return build_constructor (vectype, v); } } /* If TYPE is not a vector type, just return SC, otherwise return build_vector_from_val (TYPE, SC). */ tree build_uniform_cst (tree type, tree sc) { if (!VECTOR_TYPE_P (type)) return sc; return build_vector_from_val (type, sc); } /* Build a vector series of type TYPE in which element I has the value BASE + I * STEP. The result is a constant if BASE and STEP are constant and a VEC_SERIES_EXPR otherwise. */ tree build_vec_series (tree type, tree base, tree step) { if (integer_zerop (step)) return build_vector_from_val (type, base); if (TREE_CODE (base) == INTEGER_CST && TREE_CODE (step) == INTEGER_CST) { tree_vector_builder builder (type, 1, 3); tree elt1 = wide_int_to_tree (TREE_TYPE (base), wi::to_wide (base) + wi::to_wide (step)); tree elt2 = wide_int_to_tree (TREE_TYPE (base), wi::to_wide (elt1) + wi::to_wide (step)); builder.quick_push (base); builder.quick_push (elt1); builder.quick_push (elt2); return builder.build (); } return build2 (VEC_SERIES_EXPR, type, base, step); } /* Return a vector with the same number of units and number of bits as VEC_TYPE, but in which the elements are a linear series of unsigned integers { BASE, BASE + STEP, BASE + STEP * 2, ... }. */ tree build_index_vector (tree vec_type, poly_uint64 base, poly_uint64 step) { tree index_vec_type = vec_type; tree index_elt_type = TREE_TYPE (vec_type); poly_uint64 nunits = TYPE_VECTOR_SUBPARTS (vec_type); if (!INTEGRAL_TYPE_P (index_elt_type) || !TYPE_UNSIGNED (index_elt_type)) { index_elt_type = build_nonstandard_integer_type (GET_MODE_BITSIZE (SCALAR_TYPE_MODE (index_elt_type)), true); index_vec_type = build_vector_type (index_elt_type, nunits); } tree_vector_builder v (index_vec_type, 1, 3); for (unsigned int i = 0; i < 3; ++i) v.quick_push (build_int_cstu (index_elt_type, base + i * step)); return v.build (); } /* Return a VECTOR_CST of type VEC_TYPE in which the first NUM_A elements are A and the rest are B. */ tree build_vector_a_then_b (tree vec_type, unsigned int num_a, tree a, tree b) { gcc_assert (known_le (num_a, TYPE_VECTOR_SUBPARTS (vec_type))); unsigned int count = constant_lower_bound (TYPE_VECTOR_SUBPARTS (vec_type)); /* Optimize the constant case. */ if ((count & 1) == 0 && TYPE_VECTOR_SUBPARTS (vec_type).is_constant ()) count /= 2; tree_vector_builder builder (vec_type, count, 2); for (unsigned int i = 0; i < count * 2; ++i) builder.quick_push (i < num_a ? a : b); return builder.build (); } /* Something has messed with the elements of CONSTRUCTOR C after it was built; calculate TREE_CONSTANT and TREE_SIDE_EFFECTS. */ void recompute_constructor_flags (tree c) { unsigned int i; tree val; bool constant_p = true; bool side_effects_p = false; vec *vals = CONSTRUCTOR_ELTS (c); FOR_EACH_CONSTRUCTOR_VALUE (vals, i, val) { /* Mostly ctors will have elts that don't have side-effects, so the usual case is to scan all the elements. Hence a single loop for both const and side effects, rather than one loop each (with early outs). */ if (!TREE_CONSTANT (val)) constant_p = false; if (TREE_SIDE_EFFECTS (val)) side_effects_p = true; } TREE_SIDE_EFFECTS (c) = side_effects_p; TREE_CONSTANT (c) = constant_p; } /* Make sure that TREE_CONSTANT and TREE_SIDE_EFFECTS are correct for CONSTRUCTOR C. */ void verify_constructor_flags (tree c) { unsigned int i; tree val; bool constant_p = TREE_CONSTANT (c); bool side_effects_p = TREE_SIDE_EFFECTS (c); vec *vals = CONSTRUCTOR_ELTS (c); FOR_EACH_CONSTRUCTOR_VALUE (vals, i, val) { if (constant_p && !TREE_CONSTANT (val)) internal_error ("non-constant element in constant CONSTRUCTOR"); if (!side_effects_p && TREE_SIDE_EFFECTS (val)) internal_error ("side-effects element in no-side-effects CONSTRUCTOR"); } } /* Return a new CONSTRUCTOR node whose type is TYPE and whose values are in the vec pointed to by VALS. */ tree build_constructor (tree type, vec *vals MEM_STAT_DECL) { tree c = make_node (CONSTRUCTOR PASS_MEM_STAT); TREE_TYPE (c) = type; CONSTRUCTOR_ELTS (c) = vals; recompute_constructor_flags (c); return c; } /* Build a CONSTRUCTOR node made of a single initializer, with the specified INDEX and VALUE. */ tree build_constructor_single (tree type, tree index, tree value) { vec *v; constructor_elt elt = {index, value}; vec_alloc (v, 1); v->quick_push (elt); return build_constructor (type, v); } /* Return a new CONSTRUCTOR node whose type is TYPE and whose values are in a list pointed to by VALS. */ tree build_constructor_from_list (tree type, tree vals) { tree t; vec *v = NULL; if (vals) { vec_alloc (v, list_length (vals)); for (t = vals; t; t = TREE_CHAIN (t)) CONSTRUCTOR_APPEND_ELT (v, TREE_PURPOSE (t), TREE_VALUE (t)); } return build_constructor (type, v); } /* Return a new CONSTRUCTOR node whose type is TYPE and whose values are in a vector pointed to by VALS. Note that the TREE_PURPOSE fields in the constructor remain null. */ tree build_constructor_from_vec (tree type, const vec *vals) { vec *v = NULL; for (tree t : vals) CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, t); return build_constructor (type, v); } /* Return a new CONSTRUCTOR node whose type is TYPE. NELTS is the number of elements, provided as index/value pairs. */ tree build_constructor_va (tree type, int nelts, ...) { vec *v = NULL; va_list p; va_start (p, nelts); vec_alloc (v, nelts); while (nelts--) { tree index = va_arg (p, tree); tree value = va_arg (p, tree); CONSTRUCTOR_APPEND_ELT (v, index, value); } va_end (p); return build_constructor (type, v); } /* Return a node of type TYPE for which TREE_CLOBBER_P is true. */ tree build_clobber (tree type) { tree clobber = build_constructor (type, NULL); TREE_THIS_VOLATILE (clobber) = true; return clobber; } /* Return a new FIXED_CST node whose type is TYPE and value is F. */ tree build_fixed (tree type, FIXED_VALUE_TYPE f) { tree v; FIXED_VALUE_TYPE *fp; v = make_node (FIXED_CST); fp = ggc_alloc (); memcpy (fp, &f, sizeof (FIXED_VALUE_TYPE)); TREE_TYPE (v) = type; TREE_FIXED_CST_PTR (v) = fp; return v; } /* Return a new REAL_CST node whose type is TYPE and value is D. */ tree build_real (tree type, REAL_VALUE_TYPE d) { tree v; REAL_VALUE_TYPE *dp; int overflow = 0; /* ??? Used to check for overflow here via CHECK_FLOAT_TYPE. Consider doing it via real_convert now. */ v = make_node (REAL_CST); dp = ggc_alloc (); memcpy (dp, &d, sizeof (REAL_VALUE_TYPE)); TREE_TYPE (v) = type; TREE_REAL_CST_PTR (v) = dp; TREE_OVERFLOW (v) = overflow; return v; } /* Like build_real, but first truncate D to the type. */ tree build_real_truncate (tree type, REAL_VALUE_TYPE d) { return build_real (type, real_value_truncate (TYPE_MODE (type), d)); } /* Return a new REAL_CST node whose type is TYPE and whose value is the integer value of the INTEGER_CST node I. */ REAL_VALUE_TYPE real_value_from_int_cst (const_tree type, const_tree i) { REAL_VALUE_TYPE d; /* Clear all bits of the real value type so that we can later do bitwise comparisons to see if two values are the same. */ memset (&d, 0, sizeof d); real_from_integer (&d, type ? TYPE_MODE (type) : VOIDmode, wi::to_wide (i), TYPE_SIGN (TREE_TYPE (i))); return d; } /* Given a tree representing an integer constant I, return a tree representing the same value as a floating-point constant of type TYPE. */ tree build_real_from_int_cst (tree type, const_tree i) { tree v; int overflow = TREE_OVERFLOW (i); v = build_real (type, real_value_from_int_cst (type, i)); TREE_OVERFLOW (v) |= overflow; return v; } /* Return a new REAL_CST node whose type is TYPE and whose value is the integer value I which has sign SGN. */ tree build_real_from_wide (tree type, const wide_int_ref &i, signop sgn) { REAL_VALUE_TYPE d; /* Clear all bits of the real value type so that we can later do bitwise comparisons to see if two values are the same. */ memset (&d, 0, sizeof d); real_from_integer (&d, TYPE_MODE (type), i, sgn); return build_real (type, d); } /* Return a newly constructed STRING_CST node whose value is the LEN characters at STR when STR is nonnull, or all zeros otherwise. Note that for a C string literal, LEN should include the trailing NUL. The TREE_TYPE is not initialized. */ tree build_string (unsigned len, const char *str /*= NULL */) { /* Do not waste bytes provided by padding of struct tree_string. */ unsigned size = len + offsetof (struct tree_string, str) + 1; record_node_allocation_statistics (STRING_CST, size); tree s = (tree) ggc_internal_alloc (size); memset (s, 0, sizeof (struct tree_typed)); TREE_SET_CODE (s, STRING_CST); TREE_CONSTANT (s) = 1; TREE_STRING_LENGTH (s) = len; if (str) memcpy (s->string.str, str, len); else memset (s->string.str, 0, len); s->string.str[len] = '\0'; return s; } /* Return a newly constructed COMPLEX_CST node whose value is specified by the real and imaginary parts REAL and IMAG. Both REAL and IMAG should be constant nodes. TYPE, if specified, will be the type of the COMPLEX_CST; otherwise a new type will be made. */ tree build_complex (tree type, tree real, tree imag) { gcc_assert (CONSTANT_CLASS_P (real)); gcc_assert (CONSTANT_CLASS_P (imag)); tree t = make_node (COMPLEX_CST); TREE_REALPART (t) = real; TREE_IMAGPART (t) = imag; TREE_TYPE (t) = type ? type : build_complex_type (TREE_TYPE (real)); TREE_OVERFLOW (t) = TREE_OVERFLOW (real) | TREE_OVERFLOW (imag); return t; } /* Build a complex (inf +- 0i), such as for the result of cproj. TYPE is the complex tree type of the result. If NEG is true, the imaginary zero is negative. */ tree build_complex_inf (tree type, bool neg) { REAL_VALUE_TYPE rinf, rzero = dconst0; real_inf (&rinf); rzero.sign = neg; return build_complex (type, build_real (TREE_TYPE (type), rinf), build_real (TREE_TYPE (type), rzero)); } /* Return the constant 1 in type TYPE. If TYPE has several elements, each element is set to 1. In particular, this is 1 + i for complex types. */ tree build_each_one_cst (tree type) { if (TREE_CODE (type) == COMPLEX_TYPE) { tree scalar = build_one_cst (TREE_TYPE (type)); return build_complex (type, scalar, scalar); } else return build_one_cst (type); } /* Return a constant of arithmetic type TYPE which is the multiplicative identity of the set TYPE. */ tree build_one_cst (tree type) { switch (TREE_CODE (type)) { case INTEGER_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE: case POINTER_TYPE: case REFERENCE_TYPE: case OFFSET_TYPE: return build_int_cst (type, 1); case REAL_TYPE: return build_real (type, dconst1); case FIXED_POINT_TYPE: /* We can only generate 1 for accum types. */ gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type))); return build_fixed (type, FCONST1 (TYPE_MODE (type))); case VECTOR_TYPE: { tree scalar = build_one_cst (TREE_TYPE (type)); return build_vector_from_val (type, scalar); } case COMPLEX_TYPE: return build_complex (type, build_one_cst (TREE_TYPE (type)), build_zero_cst (TREE_TYPE (type))); default: gcc_unreachable (); } } /* Return an integer of type TYPE containing all 1's in as much precision as it contains, or a complex or vector whose subparts are such integers. */ tree build_all_ones_cst (tree type) { if (TREE_CODE (type) == COMPLEX_TYPE) { tree scalar = build_all_ones_cst (TREE_TYPE (type)); return build_complex (type, scalar, scalar); } else return build_minus_one_cst (type); } /* Return a constant of arithmetic type TYPE which is the opposite of the multiplicative identity of the set TYPE. */ tree build_minus_one_cst (tree type) { switch (TREE_CODE (type)) { case INTEGER_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE: case POINTER_TYPE: case REFERENCE_TYPE: case OFFSET_TYPE: return build_int_cst (type, -1); case REAL_TYPE: return build_real (type, dconstm1); case FIXED_POINT_TYPE: /* We can only generate 1 for accum types. */ gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type))); return build_fixed (type, fixed_from_double_int (double_int_minus_one, SCALAR_TYPE_MODE (type))); case VECTOR_TYPE: { tree scalar = build_minus_one_cst (TREE_TYPE (type)); return build_vector_from_val (type, scalar); } case COMPLEX_TYPE: return build_complex (type, build_minus_one_cst (TREE_TYPE (type)), build_zero_cst (TREE_TYPE (type))); default: gcc_unreachable (); } } /* Build 0 constant of type TYPE. This is used by constructor folding and thus the constant should be represented in memory by zero(es). */ tree build_zero_cst (tree type) { switch (TREE_CODE (type)) { case INTEGER_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE: case POINTER_TYPE: case REFERENCE_TYPE: case OFFSET_TYPE: case NULLPTR_TYPE: return build_int_cst (type, 0); case REAL_TYPE: return build_real (type, dconst0); case FIXED_POINT_TYPE: return build_fixed (type, FCONST0 (TYPE_MODE (type))); case VECTOR_TYPE: { tree scalar = build_zero_cst (TREE_TYPE (type)); return build_vector_from_val (type, scalar); } case COMPLEX_TYPE: { tree zero = build_zero_cst (TREE_TYPE (type)); return build_complex (type, zero, zero); } default: if (!AGGREGATE_TYPE_P (type)) return fold_convert (type, integer_zero_node); return build_constructor (type, NULL); } } /* Build a BINFO with LEN language slots. */ tree make_tree_binfo (unsigned base_binfos MEM_STAT_DECL) { tree t; size_t length = (offsetof (struct tree_binfo, base_binfos) + vec::embedded_size (base_binfos)); record_node_allocation_statistics (TREE_BINFO, length); t = ggc_alloc_tree_node_stat (length PASS_MEM_STAT); memset (t, 0, offsetof (struct tree_binfo, base_binfos)); TREE_SET_CODE (t, TREE_BINFO); BINFO_BASE_BINFOS (t)->embedded_init (base_binfos); return t; } /* Create a CASE_LABEL_EXPR tree node and return it. */ tree build_case_label (tree low_value, tree high_value, tree label_decl) { tree t = make_node (CASE_LABEL_EXPR); TREE_TYPE (t) = void_type_node; SET_EXPR_LOCATION (t, DECL_SOURCE_LOCATION (label_decl)); CASE_LOW (t) = low_value; CASE_HIGH (t) = high_value; CASE_LABEL (t) = label_decl; CASE_CHAIN (t) = NULL_TREE; return t; } /* Build a newly constructed INTEGER_CST node. LEN and EXT_LEN are the values of TREE_INT_CST_NUNITS and TREE_INT_CST_EXT_NUNITS respectively. The latter determines the length of the HOST_WIDE_INT vector. */ tree make_int_cst (int len, int ext_len MEM_STAT_DECL) { tree t; int length = ((ext_len - 1) * sizeof (HOST_WIDE_INT) + sizeof (struct tree_int_cst)); gcc_assert (len); record_node_allocation_statistics (INTEGER_CST, length); t = ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT); TREE_SET_CODE (t, INTEGER_CST); TREE_INT_CST_NUNITS (t) = len; TREE_INT_CST_EXT_NUNITS (t) = ext_len; /* to_offset can only be applied to trees that are offset_int-sized or smaller. EXT_LEN is correct if it fits, otherwise the constant must be exactly the precision of offset_int and so LEN is correct. */ if (ext_len <= OFFSET_INT_ELTS) TREE_INT_CST_OFFSET_NUNITS (t) = ext_len; else TREE_INT_CST_OFFSET_NUNITS (t) = len; TREE_CONSTANT (t) = 1; return t; } /* Build a newly constructed TREE_VEC node of length LEN. */ tree make_tree_vec (int len MEM_STAT_DECL) { tree t; size_t length = (len - 1) * sizeof (tree) + sizeof (struct tree_vec); record_node_allocation_statistics (TREE_VEC, length); t = ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT); TREE_SET_CODE (t, TREE_VEC); TREE_VEC_LENGTH (t) = len; return t; } /* Grow a TREE_VEC node to new length LEN. */ tree grow_tree_vec (tree v, int len MEM_STAT_DECL) { gcc_assert (TREE_CODE (v) == TREE_VEC); int oldlen = TREE_VEC_LENGTH (v); gcc_assert (len > oldlen); size_t oldlength = (oldlen - 1) * sizeof (tree) + sizeof (struct tree_vec); size_t length = (len - 1) * sizeof (tree) + sizeof (struct tree_vec); record_node_allocation_statistics (TREE_VEC, length - oldlength); v = (tree) ggc_realloc (v, length PASS_MEM_STAT); TREE_VEC_LENGTH (v) = len; return v; } /* Return 1 if EXPR is the constant zero, whether it is integral, float or fixed, and scalar, complex or vector. */ bool zerop (const_tree expr) { return (integer_zerop (expr) || real_zerop (expr) || fixed_zerop (expr)); } /* Return 1 if EXPR is the integer constant zero or a complex constant of zero, or a location wrapper for such a constant. */ bool integer_zerop (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); switch (TREE_CODE (expr)) { case INTEGER_CST: return wi::to_wide (expr) == 0; case COMPLEX_CST: return (integer_zerop (TREE_REALPART (expr)) && integer_zerop (TREE_IMAGPART (expr))); case VECTOR_CST: return (VECTOR_CST_NPATTERNS (expr) == 1 && VECTOR_CST_DUPLICATE_P (expr) && integer_zerop (VECTOR_CST_ENCODED_ELT (expr, 0))); default: return false; } } /* Return 1 if EXPR is the integer constant one or the corresponding complex constant, or a location wrapper for such a constant. */ bool integer_onep (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); switch (TREE_CODE (expr)) { case INTEGER_CST: return wi::eq_p (wi::to_widest (expr), 1); case COMPLEX_CST: return (integer_onep (TREE_REALPART (expr)) && integer_zerop (TREE_IMAGPART (expr))); case VECTOR_CST: return (VECTOR_CST_NPATTERNS (expr) == 1 && VECTOR_CST_DUPLICATE_P (expr) && integer_onep (VECTOR_CST_ENCODED_ELT (expr, 0))); default: return false; } } /* Return 1 if EXPR is the integer constant one. For complex and vector, return 1 if every piece is the integer constant one. Also return 1 for location wrappers for such a constant. */ bool integer_each_onep (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); if (TREE_CODE (expr) == COMPLEX_CST) return (integer_onep (TREE_REALPART (expr)) && integer_onep (TREE_IMAGPART (expr))); else return integer_onep (expr); } /* Return 1 if EXPR is an integer containing all 1's in as much precision as it contains, or a complex or vector whose subparts are such integers, or a location wrapper for such a constant. */ bool integer_all_onesp (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); if (TREE_CODE (expr) == COMPLEX_CST && integer_all_onesp (TREE_REALPART (expr)) && integer_all_onesp (TREE_IMAGPART (expr))) return true; else if (TREE_CODE (expr) == VECTOR_CST) return (VECTOR_CST_NPATTERNS (expr) == 1 && VECTOR_CST_DUPLICATE_P (expr) && integer_all_onesp (VECTOR_CST_ENCODED_ELT (expr, 0))); else if (TREE_CODE (expr) != INTEGER_CST) return false; return (wi::max_value (TYPE_PRECISION (TREE_TYPE (expr)), UNSIGNED) == wi::to_wide (expr)); } /* Return 1 if EXPR is the integer constant minus one, or a location wrapper for such a constant. */ bool integer_minus_onep (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); if (TREE_CODE (expr) == COMPLEX_CST) return (integer_all_onesp (TREE_REALPART (expr)) && integer_zerop (TREE_IMAGPART (expr))); else return integer_all_onesp (expr); } /* Return 1 if EXPR is an integer constant that is a power of 2 (i.e., has only one bit on), or a location wrapper for such a constant. */ bool integer_pow2p (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); if (TREE_CODE (expr) == COMPLEX_CST && integer_pow2p (TREE_REALPART (expr)) && integer_zerop (TREE_IMAGPART (expr))) return true; if (TREE_CODE (expr) != INTEGER_CST) return false; return wi::popcount (wi::to_wide (expr)) == 1; } /* Return 1 if EXPR is an integer constant other than zero or a complex constant other than zero, or a location wrapper for such a constant. */ bool integer_nonzerop (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); return ((TREE_CODE (expr) == INTEGER_CST && wi::to_wide (expr) != 0) || (TREE_CODE (expr) == COMPLEX_CST && (integer_nonzerop (TREE_REALPART (expr)) || integer_nonzerop (TREE_IMAGPART (expr))))); } /* Return 1 if EXPR is the integer constant one. For vector, return 1 if every piece is the integer constant minus one (representing the value TRUE). Also return 1 for location wrappers for such a constant. */ bool integer_truep (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); if (TREE_CODE (expr) == VECTOR_CST) return integer_all_onesp (expr); return integer_onep (expr); } /* Return 1 if EXPR is the fixed-point constant zero, or a location wrapper for such a constant. */ bool fixed_zerop (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); return (TREE_CODE (expr) == FIXED_CST && TREE_FIXED_CST (expr).data.is_zero ()); } /* Return the power of two represented by a tree node known to be a power of two. */ int tree_log2 (const_tree expr) { if (TREE_CODE (expr) == COMPLEX_CST) return tree_log2 (TREE_REALPART (expr)); return wi::exact_log2 (wi::to_wide (expr)); } /* Similar, but return the largest integer Y such that 2 ** Y is less than or equal to EXPR. */ int tree_floor_log2 (const_tree expr) { if (TREE_CODE (expr) == COMPLEX_CST) return tree_log2 (TREE_REALPART (expr)); return wi::floor_log2 (wi::to_wide (expr)); } /* Return number of known trailing zero bits in EXPR, or, if the value of EXPR is known to be zero, the precision of it's type. */ unsigned int tree_ctz (const_tree expr) { if (!INTEGRAL_TYPE_P (TREE_TYPE (expr)) && !POINTER_TYPE_P (TREE_TYPE (expr))) return 0; unsigned int ret1, ret2, prec = TYPE_PRECISION (TREE_TYPE (expr)); switch (TREE_CODE (expr)) { case INTEGER_CST: ret1 = wi::ctz (wi::to_wide (expr)); return MIN (ret1, prec); case SSA_NAME: ret1 = wi::ctz (get_nonzero_bits (expr)); return MIN (ret1, prec); case PLUS_EXPR: case MINUS_EXPR: case BIT_IOR_EXPR: case BIT_XOR_EXPR: case MIN_EXPR: case MAX_EXPR: ret1 = tree_ctz (TREE_OPERAND (expr, 0)); if (ret1 == 0) return ret1; ret2 = tree_ctz (TREE_OPERAND (expr, 1)); return MIN (ret1, ret2); case POINTER_PLUS_EXPR: ret1 = tree_ctz (TREE_OPERAND (expr, 0)); ret2 = tree_ctz (TREE_OPERAND (expr, 1)); /* Second operand is sizetype, which could be in theory wider than pointer's precision. Make sure we never return more than prec. */ ret2 = MIN (ret2, prec); return MIN (ret1, ret2); case BIT_AND_EXPR: ret1 = tree_ctz (TREE_OPERAND (expr, 0)); ret2 = tree_ctz (TREE_OPERAND (expr, 1)); return MAX (ret1, ret2); case MULT_EXPR: ret1 = tree_ctz (TREE_OPERAND (expr, 0)); ret2 = tree_ctz (TREE_OPERAND (expr, 1)); return MIN (ret1 + ret2, prec); case LSHIFT_EXPR: ret1 = tree_ctz (TREE_OPERAND (expr, 0)); if (tree_fits_uhwi_p (TREE_OPERAND (expr, 1)) && (tree_to_uhwi (TREE_OPERAND (expr, 1)) < prec)) { ret2 = tree_to_uhwi (TREE_OPERAND (expr, 1)); return MIN (ret1 + ret2, prec); } return ret1; case RSHIFT_EXPR: if (tree_fits_uhwi_p (TREE_OPERAND (expr, 1)) && (tree_to_uhwi (TREE_OPERAND (expr, 1)) < prec)) { ret1 = tree_ctz (TREE_OPERAND (expr, 0)); ret2 = tree_to_uhwi (TREE_OPERAND (expr, 1)); if (ret1 > ret2) return ret1 - ret2; } return 0; case TRUNC_DIV_EXPR: case CEIL_DIV_EXPR: case FLOOR_DIV_EXPR: case ROUND_DIV_EXPR: case EXACT_DIV_EXPR: if (TREE_CODE (TREE_OPERAND (expr, 1)) == INTEGER_CST && tree_int_cst_sgn (TREE_OPERAND (expr, 1)) == 1) { int l = tree_log2 (TREE_OPERAND (expr, 1)); if (l >= 0) { ret1 = tree_ctz (TREE_OPERAND (expr, 0)); ret2 = l; if (ret1 > ret2) return ret1 - ret2; } } return 0; CASE_CONVERT: ret1 = tree_ctz (TREE_OPERAND (expr, 0)); if (ret1 && ret1 == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr, 0)))) ret1 = prec; return MIN (ret1, prec); case SAVE_EXPR: return tree_ctz (TREE_OPERAND (expr, 0)); case COND_EXPR: ret1 = tree_ctz (TREE_OPERAND (expr, 1)); if (ret1 == 0) return 0; ret2 = tree_ctz (TREE_OPERAND (expr, 2)); return MIN (ret1, ret2); case COMPOUND_EXPR: return tree_ctz (TREE_OPERAND (expr, 1)); case ADDR_EXPR: ret1 = get_pointer_alignment (CONST_CAST_TREE (expr)); if (ret1 > BITS_PER_UNIT) { ret1 = ctz_hwi (ret1 / BITS_PER_UNIT); return MIN (ret1, prec); } return 0; default: return 0; } } /* Return 1 if EXPR is the real constant zero. Trailing zeroes matter for decimal float constants, so don't return 1 for them. Also return 1 for location wrappers around such a constant. */ bool real_zerop (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); switch (TREE_CODE (expr)) { case REAL_CST: return real_equal (&TREE_REAL_CST (expr), &dconst0) && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr)))); case COMPLEX_CST: return real_zerop (TREE_REALPART (expr)) && real_zerop (TREE_IMAGPART (expr)); case VECTOR_CST: { /* Don't simply check for a duplicate because the predicate accepts both +0.0 and -0.0. */ unsigned count = vector_cst_encoded_nelts (expr); for (unsigned int i = 0; i < count; ++i) if (!real_zerop (VECTOR_CST_ENCODED_ELT (expr, i))) return false; return true; } default: return false; } } /* Return 1 if EXPR is the real constant one in real or complex form. Trailing zeroes matter for decimal float constants, so don't return 1 for them. Also return 1 for location wrappers around such a constant. */ bool real_onep (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); switch (TREE_CODE (expr)) { case REAL_CST: return real_equal (&TREE_REAL_CST (expr), &dconst1) && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr)))); case COMPLEX_CST: return real_onep (TREE_REALPART (expr)) && real_zerop (TREE_IMAGPART (expr)); case VECTOR_CST: return (VECTOR_CST_NPATTERNS (expr) == 1 && VECTOR_CST_DUPLICATE_P (expr) && real_onep (VECTOR_CST_ENCODED_ELT (expr, 0))); default: return false; } } /* Return 1 if EXPR is the real constant minus one. Trailing zeroes matter for decimal float constants, so don't return 1 for them. Also return 1 for location wrappers around such a constant. */ bool real_minus_onep (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); switch (TREE_CODE (expr)) { case REAL_CST: return real_equal (&TREE_REAL_CST (expr), &dconstm1) && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr)))); case COMPLEX_CST: return real_minus_onep (TREE_REALPART (expr)) && real_zerop (TREE_IMAGPART (expr)); case VECTOR_CST: return (VECTOR_CST_NPATTERNS (expr) == 1 && VECTOR_CST_DUPLICATE_P (expr) && real_minus_onep (VECTOR_CST_ENCODED_ELT (expr, 0))); default: return false; } } /* Nonzero if EXP is a constant or a cast of a constant. */ bool really_constant_p (const_tree exp) { /* This is not quite the same as STRIP_NOPS. It does more. */ while (CONVERT_EXPR_P (exp) || TREE_CODE (exp) == NON_LVALUE_EXPR) exp = TREE_OPERAND (exp, 0); return TREE_CONSTANT (exp); } /* Return true if T holds a polynomial pointer difference, storing it in *VALUE if so. A true return means that T's precision is no greater than 64 bits, which is the largest address space we support, so *VALUE never loses precision. However, the signedness of the result does not necessarily match the signedness of T: sometimes an unsigned type like sizetype is used to encode a value that is actually negative. */ bool ptrdiff_tree_p (const_tree t, poly_int64_pod *value) { if (!t) return false; if (TREE_CODE (t) == INTEGER_CST) { if (!cst_and_fits_in_hwi (t)) return false; *value = int_cst_value (t); return true; } if (POLY_INT_CST_P (t)) { for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) if (!cst_and_fits_in_hwi (POLY_INT_CST_COEFF (t, i))) return false; for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) value->coeffs[i] = int_cst_value (POLY_INT_CST_COEFF (t, i)); return true; } return false; } poly_int64 tree_to_poly_int64 (const_tree t) { gcc_assert (tree_fits_poly_int64_p (t)); if (POLY_INT_CST_P (t)) return poly_int_cst_value (t).force_shwi (); return TREE_INT_CST_LOW (t); } poly_uint64 tree_to_poly_uint64 (const_tree t) { gcc_assert (tree_fits_poly_uint64_p (t)); if (POLY_INT_CST_P (t)) return poly_int_cst_value (t).force_uhwi (); return TREE_INT_CST_LOW (t); } /* Return first list element whose TREE_VALUE is ELEM. Return 0 if ELEM is not in LIST. */ tree value_member (tree elem, tree list) { while (list) { if (elem == TREE_VALUE (list)) return list; list = TREE_CHAIN (list); } return NULL_TREE; } /* Return first list element whose TREE_PURPOSE is ELEM. Return 0 if ELEM is not in LIST. */ tree purpose_member (const_tree elem, tree list) { while (list) { if (elem == TREE_PURPOSE (list)) return list; list = TREE_CHAIN (list); } return NULL_TREE; } /* Return true if ELEM is in V. */ bool vec_member (const_tree elem, vec *v) { unsigned ix; tree t; FOR_EACH_VEC_SAFE_ELT (v, ix, t) if (elem == t) return true; return false; } /* Returns element number IDX (zero-origin) of chain CHAIN, or NULL_TREE. */ tree chain_index (int idx, tree chain) { for (; chain && idx > 0; --idx) chain = TREE_CHAIN (chain); return chain; } /* Return nonzero if ELEM is part of the chain CHAIN. */ bool chain_member (const_tree elem, const_tree chain) { while (chain) { if (elem == chain) return true; chain = DECL_CHAIN (chain); } return false; } /* Return the length of a chain of nodes chained through TREE_CHAIN. We expect a null pointer to mark the end of the chain. This is the Lisp primitive `length'. */ int list_length (const_tree t) { const_tree p = t; #ifdef ENABLE_TREE_CHECKING const_tree q = t; #endif int len = 0; while (p) { p = TREE_CHAIN (p); #ifdef ENABLE_TREE_CHECKING if (len % 2) q = TREE_CHAIN (q); gcc_assert (p != q); #endif len++; } return len; } /* Returns the first FIELD_DECL in the TYPE_FIELDS of the RECORD_TYPE or UNION_TYPE TYPE, or NULL_TREE if none. */ tree first_field (const_tree type) { tree t = TYPE_FIELDS (type); while (t && TREE_CODE (t) != FIELD_DECL) t = TREE_CHAIN (t); return t; } /* Returns the last FIELD_DECL in the TYPE_FIELDS of the RECORD_TYPE or UNION_TYPE TYPE, or NULL_TREE if none. */ tree last_field (const_tree type) { tree last = NULL_TREE; for (tree fld = TYPE_FIELDS (type); fld; fld = TREE_CHAIN (fld)) { if (TREE_CODE (fld) != FIELD_DECL) continue; last = fld; } return last; } /* Concatenate two chains of nodes (chained through TREE_CHAIN) by modifying the last node in chain 1 to point to chain 2. This is the Lisp primitive `nconc'. */ tree chainon (tree op1, tree op2) { tree t1; if (!op1) return op2; if (!op2) return op1; for (t1 = op1; TREE_CHAIN (t1); t1 = TREE_CHAIN (t1)) continue; TREE_CHAIN (t1) = op2; #ifdef ENABLE_TREE_CHECKING { tree t2; for (t2 = op2; t2; t2 = TREE_CHAIN (t2)) gcc_assert (t2 != t1); } #endif return op1; } /* Return the last node in a chain of nodes (chained through TREE_CHAIN). */ tree tree_last (tree chain) { tree next; if (chain) while ((next = TREE_CHAIN (chain))) chain = next; return chain; } /* Reverse the order of elements in the chain T, and return the new head of the chain (old last element). */ tree nreverse (tree t) { tree prev = 0, decl, next; for (decl = t; decl; decl = next) { /* We shouldn't be using this function to reverse BLOCK chains; we have blocks_nreverse for that. */ gcc_checking_assert (TREE_CODE (decl) != BLOCK); next = TREE_CHAIN (decl); TREE_CHAIN (decl) = prev; prev = decl; } return prev; } /* Return a newly created TREE_LIST node whose purpose and value fields are PARM and VALUE. */ tree build_tree_list (tree parm, tree value MEM_STAT_DECL) { tree t = make_node (TREE_LIST PASS_MEM_STAT); TREE_PURPOSE (t) = parm; TREE_VALUE (t) = value; return t; } /* Build a chain of TREE_LIST nodes from a vector. */ tree build_tree_list_vec (const vec *vec MEM_STAT_DECL) { tree ret = NULL_TREE; tree *pp = &ret; unsigned int i; tree t; FOR_EACH_VEC_SAFE_ELT (vec, i, t) { *pp = build_tree_list (NULL, t PASS_MEM_STAT); pp = &TREE_CHAIN (*pp); } return ret; } /* Return a newly created TREE_LIST node whose purpose and value fields are PURPOSE and VALUE and whose TREE_CHAIN is CHAIN. */ tree tree_cons (tree purpose, tree value, tree chain MEM_STAT_DECL) { tree node; node = ggc_alloc_tree_node_stat (sizeof (struct tree_list) PASS_MEM_STAT); memset (node, 0, sizeof (struct tree_common)); record_node_allocation_statistics (TREE_LIST, sizeof (struct tree_list)); TREE_SET_CODE (node, TREE_LIST); TREE_CHAIN (node) = chain; TREE_PURPOSE (node) = purpose; TREE_VALUE (node) = value; return node; } /* Return the values of the elements of a CONSTRUCTOR as a vector of trees. */ vec * ctor_to_vec (tree ctor) { vec *vec; vec_alloc (vec, CONSTRUCTOR_NELTS (ctor)); unsigned int ix; tree val; FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor), ix, val) vec->quick_push (val); return vec; } /* Return the size nominally occupied by an object of type TYPE when it resides in memory. The value is measured in units of bytes, and its data type is that normally used for type sizes (which is the first type created by make_signed_type or make_unsigned_type). */ tree size_in_bytes_loc (location_t loc, const_tree type) { tree t; if (type == error_mark_node) return integer_zero_node; type = TYPE_MAIN_VARIANT (type); t = TYPE_SIZE_UNIT (type); if (t == 0) { lang_hooks.types.incomplete_type_error (loc, NULL_TREE, type); return size_zero_node; } return t; } /* Return the size of TYPE (in bytes) as a wide integer or return -1 if the size can vary or is larger than an integer. */ HOST_WIDE_INT int_size_in_bytes (const_tree type) { tree t; if (type == error_mark_node) return 0; type = TYPE_MAIN_VARIANT (type); t = TYPE_SIZE_UNIT (type); if (t && tree_fits_uhwi_p (t)) return TREE_INT_CST_LOW (t); else return -1; } /* Return the maximum size of TYPE (in bytes) as a wide integer or return -1 if the size can vary or is larger than an integer. */ HOST_WIDE_INT max_int_size_in_bytes (const_tree type) { HOST_WIDE_INT size = -1; tree size_tree; /* If this is an array type, check for a possible MAX_SIZE attached. */ if (TREE_CODE (type) == ARRAY_TYPE) { size_tree = TYPE_ARRAY_MAX_SIZE (type); if (size_tree && tree_fits_uhwi_p (size_tree)) size = tree_to_uhwi (size_tree); } /* If we still haven't been able to get a size, see if the language can compute a maximum size. */ if (size == -1) { size_tree = lang_hooks.types.max_size (type); if (size_tree && tree_fits_uhwi_p (size_tree)) size = tree_to_uhwi (size_tree); } return size; } /* Return the bit position of FIELD, in bits from the start of the record. This is a tree of type bitsizetype. */ tree bit_position (const_tree field) { return bit_from_pos (DECL_FIELD_OFFSET (field), DECL_FIELD_BIT_OFFSET (field)); } /* Return the byte position of FIELD, in bytes from the start of the record. This is a tree of type sizetype. */ tree byte_position (const_tree field) { return byte_from_pos (DECL_FIELD_OFFSET (field), DECL_FIELD_BIT_OFFSET (field)); } /* Likewise, but return as an integer. It must be representable in that way (since it could be a signed value, we don't have the option of returning -1 like int_size_in_byte can. */ HOST_WIDE_INT int_byte_position (const_tree field) { return tree_to_shwi (byte_position (field)); } /* Return, as a tree node, the number of elements for TYPE (which is an ARRAY_TYPE) minus one. This counts only elements of the top array. */ tree array_type_nelts (const_tree type) { tree index_type, min, max; /* If they did it with unspecified bounds, then we should have already given an error about it before we got here. */ if (! TYPE_DOMAIN (type)) return error_mark_node; index_type = TYPE_DOMAIN (type); min = TYPE_MIN_VALUE (index_type); max = TYPE_MAX_VALUE (index_type); /* TYPE_MAX_VALUE may not be set if the array has unknown length. */ if (!max) { /* zero sized arrays are represented from C FE as complete types with NULL TYPE_MAX_VALUE and zero TYPE_SIZE, while C++ FE represents them as min 0, max -1. */ if (COMPLETE_TYPE_P (type) && integer_zerop (TYPE_SIZE (type)) && integer_zerop (min)) return build_int_cst (TREE_TYPE (min), -1); return error_mark_node; } return (integer_zerop (min) ? max : fold_build2 (MINUS_EXPR, TREE_TYPE (max), max, min)); } /* If arg is static -- a reference to an object in static storage -- then return the object. This is not the same as the C meaning of `static'. If arg isn't static, return NULL. */ tree staticp (tree arg) { switch (TREE_CODE (arg)) { case FUNCTION_DECL: /* Nested functions are static, even though taking their address will involve a trampoline as we unnest the nested function and create the trampoline on the tree level. */ return arg; case VAR_DECL: return ((TREE_STATIC (arg) || DECL_EXTERNAL (arg)) && ! DECL_THREAD_LOCAL_P (arg) && ! DECL_DLLIMPORT_P (arg) ? arg : NULL); case CONST_DECL: return ((TREE_STATIC (arg) || DECL_EXTERNAL (arg)) ? arg : NULL); case CONSTRUCTOR: return TREE_STATIC (arg) ? arg : NULL; case LABEL_DECL: case STRING_CST: return arg; case COMPONENT_REF: /* If the thing being referenced is not a field, then it is something language specific. */ gcc_assert (TREE_CODE (TREE_OPERAND (arg, 1)) == FIELD_DECL); /* If we are referencing a bitfield, we can't evaluate an ADDR_EXPR at compile time and so it isn't a constant. */ if (DECL_BIT_FIELD (TREE_OPERAND (arg, 1))) return NULL; return staticp (TREE_OPERAND (arg, 0)); case BIT_FIELD_REF: return NULL; case INDIRECT_REF: return TREE_CONSTANT (TREE_OPERAND (arg, 0)) ? arg : NULL; case ARRAY_REF: case ARRAY_RANGE_REF: if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg))) == INTEGER_CST && TREE_CODE (TREE_OPERAND (arg, 1)) == INTEGER_CST) return staticp (TREE_OPERAND (arg, 0)); else return NULL; case COMPOUND_LITERAL_EXPR: return TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (arg)) ? arg : NULL; default: return NULL; } } /* Return whether OP is a DECL whose address is function-invariant. */ bool decl_address_invariant_p (const_tree op) { /* The conditions below are slightly less strict than the one in staticp. */ switch (TREE_CODE (op)) { case PARM_DECL: case RESULT_DECL: case LABEL_DECL: case FUNCTION_DECL: return true; case VAR_DECL: if ((TREE_STATIC (op) || DECL_EXTERNAL (op)) || DECL_THREAD_LOCAL_P (op) || DECL_CONTEXT (op) == current_function_decl || decl_function_context (op) == current_function_decl) return true; break; case CONST_DECL: if ((TREE_STATIC (op) || DECL_EXTERNAL (op)) || decl_function_context (op) == current_function_decl) return true; break; default: break; } return false; } /* Return whether OP is a DECL whose address is interprocedural-invariant. */ bool decl_address_ip_invariant_p (const_tree op) { /* The conditions below are slightly less strict than the one in staticp. */ switch (TREE_CODE (op)) { case LABEL_DECL: case FUNCTION_DECL: case STRING_CST: return true; case VAR_DECL: if (((TREE_STATIC (op) || DECL_EXTERNAL (op)) && !DECL_DLLIMPORT_P (op)) || DECL_THREAD_LOCAL_P (op)) return true; break; case CONST_DECL: if ((TREE_STATIC (op) || DECL_EXTERNAL (op))) return true; break; default: break; } return false; } /* Return true if T is function-invariant (internal function, does not handle arithmetic; that's handled in skip_simple_arithmetic and tree_invariant_p). */ static bool tree_invariant_p_1 (tree t) { tree op; if (TREE_CONSTANT (t) || (TREE_READONLY (t) && !TREE_SIDE_EFFECTS (t))) return true; switch (TREE_CODE (t)) { case SAVE_EXPR: return true; case ADDR_EXPR: op = TREE_OPERAND (t, 0); while (handled_component_p (op)) { switch (TREE_CODE (op)) { case ARRAY_REF: case ARRAY_RANGE_REF: if (!tree_invariant_p (TREE_OPERAND (op, 1)) || TREE_OPERAND (op, 2) != NULL_TREE || TREE_OPERAND (op, 3) != NULL_TREE) return false; break; case COMPONENT_REF: if (TREE_OPERAND (op, 2) != NULL_TREE) return false; break; default:; } op = TREE_OPERAND (op, 0); } return CONSTANT_CLASS_P (op) || decl_address_invariant_p (op); default: break; } return false; } /* Return true if T is function-invariant. */ bool tree_invariant_p (tree t) { tree inner = skip_simple_arithmetic (t); return tree_invariant_p_1 (inner); } /* Wrap a SAVE_EXPR around EXPR, if appropriate. Do this to any expression which may be used in more than one place, but must be evaluated only once. Normally, expand_expr would reevaluate the expression each time. Calling save_expr produces something that is evaluated and recorded the first time expand_expr is called on it. Subsequent calls to expand_expr just reuse the recorded value. The call to expand_expr that generates code that actually computes the value is the first call *at compile time*. Subsequent calls *at compile time* generate code to use the saved value. This produces correct result provided that *at run time* control always flows through the insns made by the first expand_expr before reaching the other places where the save_expr was evaluated. You, the caller of save_expr, must make sure this is so. Constants, and certain read-only nodes, are returned with no SAVE_EXPR because that is safe. Expressions containing placeholders are not touched; see tree.def for an explanation of what these are used for. */ tree save_expr (tree expr) { tree inner; /* If the tree evaluates to a constant, then we don't want to hide that fact (i.e. this allows further folding, and direct checks for constants). However, a read-only object that has side effects cannot be bypassed. Since it is no problem to reevaluate literals, we just return the literal node. */ inner = skip_simple_arithmetic (expr); if (TREE_CODE (inner) == ERROR_MARK) return inner; if (tree_invariant_p_1 (inner)) return expr; /* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time, since it means that the size or offset of some field of an object depends on the value within another field. Note that it must not be the case that EXPR contains both a PLACEHOLDER_EXPR and some variable since it would then need to be both evaluated once and evaluated more than once. Front-ends must assure this case cannot happen by surrounding any such subexpressions in their own SAVE_EXPR and forcing evaluation at the proper time. */ if (contains_placeholder_p (inner)) return expr; expr = build1_loc (EXPR_LOCATION (expr), SAVE_EXPR, TREE_TYPE (expr), expr); /* This expression might be placed ahead of a jump to ensure that the value was computed on both sides of the jump. So make sure it isn't eliminated as dead. */ TREE_SIDE_EFFECTS (expr) = 1; return expr; } /* Look inside EXPR into any simple arithmetic operations. Return the outermost non-arithmetic or non-invariant node. */ tree skip_simple_arithmetic (tree expr) { /* We don't care about whether this can be used as an lvalue in this context. */ while (TREE_CODE (expr) == NON_LVALUE_EXPR) expr = TREE_OPERAND (expr, 0); /* If we have simple operations applied to a SAVE_EXPR or to a SAVE_EXPR and a constant, it will be more efficient to not make another SAVE_EXPR since it will allow better simplification and GCSE will be able to merge the computations if they actually occur. */ while (true) { if (UNARY_CLASS_P (expr)) expr = TREE_OPERAND (expr, 0); else if (BINARY_CLASS_P (expr)) { if (tree_invariant_p (TREE_OPERAND (expr, 1))) expr = TREE_OPERAND (expr, 0); else if (tree_invariant_p (TREE_OPERAND (expr, 0))) expr = TREE_OPERAND (expr, 1); else break; } else break; } return expr; } /* Look inside EXPR into simple arithmetic operations involving constants. Return the outermost non-arithmetic or non-constant node. */ tree skip_simple_constant_arithmetic (tree expr) { while (TREE_CODE (expr) == NON_LVALUE_EXPR) expr = TREE_OPERAND (expr, 0); while (true) { if (UNARY_CLASS_P (expr)) expr = TREE_OPERAND (expr, 0); else if (BINARY_CLASS_P (expr)) { if (TREE_CONSTANT (TREE_OPERAND (expr, 1))) expr = TREE_OPERAND (expr, 0); else if (TREE_CONSTANT (TREE_OPERAND (expr, 0))) expr = TREE_OPERAND (expr, 1); else break; } else break; } return expr; } /* Return which tree structure is used by T. */ enum tree_node_structure_enum tree_node_structure (const_tree t) { const enum tree_code code = TREE_CODE (t); return tree_node_structure_for_code (code); } /* Set various status flags when building a CALL_EXPR object T. */ static void process_call_operands (tree t) { bool side_effects = TREE_SIDE_EFFECTS (t); bool read_only = false; int i = call_expr_flags (t); /* Calls have side-effects, except those to const or pure functions. */ if ((i & ECF_LOOPING_CONST_OR_PURE) || !(i & (ECF_CONST | ECF_PURE))) side_effects = true; /* Propagate TREE_READONLY of arguments for const functions. */ if (i & ECF_CONST) read_only = true; if (!side_effects || read_only) for (i = 1; i < TREE_OPERAND_LENGTH (t); i++) { tree op = TREE_OPERAND (t, i); if (op && TREE_SIDE_EFFECTS (op)) side_effects = true; if (op && !TREE_READONLY (op) && !CONSTANT_CLASS_P (op)) read_only = false; } TREE_SIDE_EFFECTS (t) = side_effects; TREE_READONLY (t) = read_only; } /* Return true if EXP contains a PLACEHOLDER_EXPR, i.e. if it represents a size or offset that depends on a field within a record. */ bool contains_placeholder_p (const_tree exp) { enum tree_code code; if (!exp) return 0; code = TREE_CODE (exp); if (code == PLACEHOLDER_EXPR) return 1; switch (TREE_CODE_CLASS (code)) { case tcc_reference: /* Don't look at any PLACEHOLDER_EXPRs that might be in index or bit position computations since they will be converted into a WITH_RECORD_EXPR involving the reference, which will assume here will be valid. */ return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 0)); case tcc_exceptional: if (code == TREE_LIST) return (CONTAINS_PLACEHOLDER_P (TREE_VALUE (exp)) || CONTAINS_PLACEHOLDER_P (TREE_CHAIN (exp))); break; case tcc_unary: case tcc_binary: case tcc_comparison: case tcc_expression: switch (code) { case COMPOUND_EXPR: /* Ignoring the first operand isn't quite right, but works best. */ return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 1)); case COND_EXPR: return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 0)) || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 1)) || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 2))); case SAVE_EXPR: /* The save_expr function never wraps anything containing a PLACEHOLDER_EXPR. */ return 0; default: break; } switch (TREE_CODE_LENGTH (code)) { case 1: return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 0)); case 2: return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 0)) || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp, 1))); default: return 0; } case tcc_vl_exp: switch (code) { case CALL_EXPR: { const_tree arg; const_call_expr_arg_iterator iter; FOR_EACH_CONST_CALL_EXPR_ARG (arg, iter, exp) if (CONTAINS_PLACEHOLDER_P (arg)) return 1; return 0; } default: return 0; } default: return 0; } return 0; } /* Return true if any part of the structure of TYPE involves a PLACEHOLDER_EXPR directly. This includes size, bounds, qualifiers (for QUAL_UNION_TYPE) and field positions. */ static bool type_contains_placeholder_1 (const_tree type) { /* If the size contains a placeholder or the parent type (component type in the case of arrays) type involves a placeholder, this type does. */ if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type)) || CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (type)) || (!POINTER_TYPE_P (type) && TREE_TYPE (type) && type_contains_placeholder_p (TREE_TYPE (type)))) return true; /* Now do type-specific checks. Note that the last part of the check above greatly limits what we have to do below. */ switch (TREE_CODE (type)) { case VOID_TYPE: case OPAQUE_TYPE: case COMPLEX_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE: case POINTER_TYPE: case OFFSET_TYPE: case REFERENCE_TYPE: case METHOD_TYPE: case FUNCTION_TYPE: case VECTOR_TYPE: case NULLPTR_TYPE: return false; case INTEGER_TYPE: case REAL_TYPE: case FIXED_POINT_TYPE: /* Here we just check the bounds. */ return (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (type)) || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (type))); case ARRAY_TYPE: /* We have already checked the component type above, so just check the domain type. Flexible array members have a null domain. */ return TYPE_DOMAIN (type) ? type_contains_placeholder_p (TYPE_DOMAIN (type)) : false; case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: { tree field; for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) if (TREE_CODE (field) == FIELD_DECL && (CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (field)) || (TREE_CODE (type) == QUAL_UNION_TYPE && CONTAINS_PLACEHOLDER_P (DECL_QUALIFIER (field))) || type_contains_placeholder_p (TREE_TYPE (field)))) return true; return false; } default: gcc_unreachable (); } } /* Wrapper around above function used to cache its result. */ bool type_contains_placeholder_p (tree type) { bool result; /* If the contains_placeholder_bits field has been initialized, then we know the answer. */ if (TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type) > 0) return TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type) - 1; /* Indicate that we've seen this type node, and the answer is false. This is what we want to return if we run into recursion via fields. */ TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type) = 1; /* Compute the real value. */ result = type_contains_placeholder_1 (type); /* Store the real value. */ TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type) = result + 1; return result; } /* Push tree EXP onto vector QUEUE if it is not already present. */ static void push_without_duplicates (tree exp, vec *queue) { unsigned int i; tree iter; FOR_EACH_VEC_ELT (*queue, i, iter) if (simple_cst_equal (iter, exp) == 1) break; if (!iter) queue->safe_push (exp); } /* Given a tree EXP, find all occurrences of references to fields in a PLACEHOLDER_EXPR and place them in vector REFS without duplicates. Also record VAR_DECLs and CONST_DECLs. Note that we assume here that EXP contains only arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their argument list. */ void find_placeholder_in_expr (tree exp, vec *refs) { enum tree_code code = TREE_CODE (exp); tree inner; int i; /* We handle TREE_LIST and COMPONENT_REF separately. */ if (code == TREE_LIST) { FIND_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp), refs); FIND_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp), refs); } else if (code == COMPONENT_REF) { for (inner = TREE_OPERAND (exp, 0); REFERENCE_CLASS_P (inner); inner = TREE_OPERAND (inner, 0)) ; if (TREE_CODE (inner) == PLACEHOLDER_EXPR) push_without_duplicates (exp, refs); else FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), refs); } else switch (TREE_CODE_CLASS (code)) { case tcc_constant: break; case tcc_declaration: /* Variables allocated to static storage can stay. */ if (!TREE_STATIC (exp)) push_without_duplicates (exp, refs); break; case tcc_expression: /* This is the pattern built in ada/make_aligning_type. */ if (code == ADDR_EXPR && TREE_CODE (TREE_OPERAND (exp, 0)) == PLACEHOLDER_EXPR) { push_without_duplicates (exp, refs); break; } /* Fall through. */ case tcc_exceptional: case tcc_unary: case tcc_binary: case tcc_comparison: case tcc_reference: for (i = 0; i < TREE_CODE_LENGTH (code); i++) FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, i), refs); break; case tcc_vl_exp: for (i = 1; i < TREE_OPERAND_LENGTH (exp); i++) FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, i), refs); break; default: gcc_unreachable (); } } /* Given a tree EXP, a FIELD_DECL F, and a replacement value R, return a tree with all occurrences of references to F in a PLACEHOLDER_EXPR replaced by R. Also handle VAR_DECLs and CONST_DECLs. Note that we assume here that EXP contains only arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their argument list. */ tree substitute_in_expr (tree exp, tree f, tree r) { enum tree_code code = TREE_CODE (exp); tree op0, op1, op2, op3; tree new_tree; /* We handle TREE_LIST and COMPONENT_REF separately. */ if (code == TREE_LIST) { op0 = SUBSTITUTE_IN_EXPR (TREE_CHAIN (exp), f, r); op1 = SUBSTITUTE_IN_EXPR (TREE_VALUE (exp), f, r); if (op0 == TREE_CHAIN (exp) && op1 == TREE_VALUE (exp)) return exp; return tree_cons (TREE_PURPOSE (exp), op1, op0); } else if (code == COMPONENT_REF) { tree inner; /* If this expression is getting a value from a PLACEHOLDER_EXPR and it is the right field, replace it with R. */ for (inner = TREE_OPERAND (exp, 0); REFERENCE_CLASS_P (inner); inner = TREE_OPERAND (inner, 0)) ; /* The field. */ op1 = TREE_OPERAND (exp, 1); if (TREE_CODE (inner) == PLACEHOLDER_EXPR && op1 == f) return r; /* If this expression hasn't been completed let, leave it alone. */ if (TREE_CODE (inner) == PLACEHOLDER_EXPR && !TREE_TYPE (inner)) return exp; op0 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 0), f, r); if (op0 == TREE_OPERAND (exp, 0)) return exp; new_tree = fold_build3 (COMPONENT_REF, TREE_TYPE (exp), op0, op1, NULL_TREE); } else switch (TREE_CODE_CLASS (code)) { case tcc_constant: return exp; case tcc_declaration: if (exp == f) return r; else return exp; case tcc_expression: if (exp == f) return r; /* Fall through. */ case tcc_exceptional: case tcc_unary: case tcc_binary: case tcc_comparison: case tcc_reference: switch (TREE_CODE_LENGTH (code)) { case 0: return exp; case 1: op0 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 0), f, r); if (op0 == TREE_OPERAND (exp, 0)) return exp; new_tree = fold_build1 (code, TREE_TYPE (exp), op0); break; case 2: op0 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 0), f, r); op1 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 1), f, r); if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1)) return exp; new_tree = fold_build2 (code, TREE_TYPE (exp), op0, op1); break; case 3: op0 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 0), f, r); op1 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 1), f, r); op2 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 2), f, r); if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1) && op2 == TREE_OPERAND (exp, 2)) return exp; new_tree = fold_build3 (code, TREE_TYPE (exp), op0, op1, op2); break; case 4: op0 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 0), f, r); op1 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 1), f, r); op2 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 2), f, r); op3 = SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp, 3), f, r); if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1) && op2 == TREE_OPERAND (exp, 2) && op3 == TREE_OPERAND (exp, 3)) return exp; new_tree = fold (build4 (code, TREE_TYPE (exp), op0, op1, op2, op3)); break; default: gcc_unreachable (); } break; case tcc_vl_exp: { int i; new_tree = NULL_TREE; /* If we are trying to replace F with a constant or with another instance of one of the arguments of the call, inline back functions which do nothing else than computing a value from the arguments they are passed. This makes it possible to fold partially or entirely the replacement expression. */ if (code == CALL_EXPR) { bool maybe_inline = false; if (CONSTANT_CLASS_P (r)) maybe_inline = true; else for (i = 3; i < TREE_OPERAND_LENGTH (exp); i++) if (operand_equal_p (TREE_OPERAND (exp, i), r, 0)) { maybe_inline = true; break; } if (maybe_inline) { tree t = maybe_inline_call_in_expr (exp); if (t) return SUBSTITUTE_IN_EXPR (t, f, r); } } for (i = 1; i < TREE_OPERAND_LENGTH (exp); i++) { tree op = TREE_OPERAND (exp, i); tree new_op = SUBSTITUTE_IN_EXPR (op, f, r); if (new_op != op) { if (!new_tree) new_tree = copy_node (exp); TREE_OPERAND (new_tree, i) = new_op; } } if (new_tree) { new_tree = fold (new_tree); if (TREE_CODE (new_tree) == CALL_EXPR) process_call_operands (new_tree); } else return exp; } break; default: gcc_unreachable (); } TREE_READONLY (new_tree) |= TREE_READONLY (exp); if (code == INDIRECT_REF || code == ARRAY_REF || code == ARRAY_RANGE_REF) TREE_THIS_NOTRAP (new_tree) |= TREE_THIS_NOTRAP (exp); return new_tree; } /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement for it within OBJ, a tree that is an object or a chain of references. */ tree substitute_placeholder_in_expr (tree exp, tree obj) { enum tree_code code = TREE_CODE (exp); tree op0, op1, op2, op3; tree new_tree; /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type in the chain of OBJ. */ if (code == PLACEHOLDER_EXPR) { tree need_type = TYPE_MAIN_VARIANT (TREE_TYPE (exp)); tree elt; for (elt = obj; elt != 0; elt = ((TREE_CODE (elt) == COMPOUND_EXPR || TREE_CODE (elt) == COND_EXPR) ? TREE_OPERAND (elt, 1) : (REFERENCE_CLASS_P (elt) || UNARY_CLASS_P (elt) || BINARY_CLASS_P (elt) || VL_EXP_CLASS_P (elt) || EXPRESSION_CLASS_P (elt)) ? TREE_OPERAND (elt, 0) : 0)) if (TYPE_MAIN_VARIANT (TREE_TYPE (elt)) == need_type) return elt; for (elt = obj; elt != 0; elt = ((TREE_CODE (elt) == COMPOUND_EXPR || TREE_CODE (elt) == COND_EXPR) ? TREE_OPERAND (elt, 1) : (REFERENCE_CLASS_P (elt) || UNARY_CLASS_P (elt) || BINARY_CLASS_P (elt) || VL_EXP_CLASS_P (elt) || EXPRESSION_CLASS_P (elt)) ? TREE_OPERAND (elt, 0) : 0)) if (POINTER_TYPE_P (TREE_TYPE (elt)) && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt))) == need_type)) return fold_build1 (INDIRECT_REF, need_type, elt); /* If we didn't find it, return the original PLACEHOLDER_EXPR. If it survives until RTL generation, there will be an error. */ return exp; } /* TREE_LIST is special because we need to look at TREE_VALUE and TREE_CHAIN, not TREE_OPERANDS. */ else if (code == TREE_LIST) { op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp), obj); op1 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp), obj); if (op0 == TREE_CHAIN (exp) && op1 == TREE_VALUE (exp)) return exp; return tree_cons (TREE_PURPOSE (exp), op1, op0); } else switch (TREE_CODE_CLASS (code)) { case tcc_constant: case tcc_declaration: return exp; case tcc_exceptional: case tcc_unary: case tcc_binary: case tcc_comparison: case tcc_expression: case tcc_reference: case tcc_statement: switch (TREE_CODE_LENGTH (code)) { case 0: return exp; case 1: op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), obj); if (op0 == TREE_OPERAND (exp, 0)) return exp; new_tree = fold_build1 (code, TREE_TYPE (exp), op0); break; case 2: op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), obj); op1 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 1), obj); if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1)) return exp; new_tree = fold_build2 (code, TREE_TYPE (exp), op0, op1); break; case 3: op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), obj); op1 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 1), obj); op2 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 2), obj); if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1) && op2 == TREE_OPERAND (exp, 2)) return exp; new_tree = fold_build3 (code, TREE_TYPE (exp), op0, op1, op2); break; case 4: op0 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 0), obj); op1 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 1), obj); op2 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 2), obj); op3 = SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp, 3), obj); if (op0 == TREE_OPERAND (exp, 0) && op1 == TREE_OPERAND (exp, 1) && op2 == TREE_OPERAND (exp, 2) && op3 == TREE_OPERAND (exp, 3)) return exp; new_tree = fold (build4 (code, TREE_TYPE (exp), op0, op1, op2, op3)); break; default: gcc_unreachable (); } break; case tcc_vl_exp: { int i; new_tree = NULL_TREE; for (i = 1; i < TREE_OPERAND_LENGTH (exp); i++) { tree op = TREE_OPERAND (exp, i); tree new_op = SUBSTITUTE_PLACEHOLDER_IN_EXPR (op, obj); if (new_op != op) { if (!new_tree) new_tree = copy_node (exp); TREE_OPERAND (new_tree, i) = new_op; } } if (new_tree) { new_tree = fold (new_tree); if (TREE_CODE (new_tree) == CALL_EXPR) process_call_operands (new_tree); } else return exp; } break; default: gcc_unreachable (); } TREE_READONLY (new_tree) |= TREE_READONLY (exp); if (code == INDIRECT_REF || code == ARRAY_REF || code == ARRAY_RANGE_REF) TREE_THIS_NOTRAP (new_tree) |= TREE_THIS_NOTRAP (exp); return new_tree; } /* Subroutine of stabilize_reference; this is called for subtrees of references. Any expression with side-effects must be put in a SAVE_EXPR to ensure that it is only evaluated once. We don't put SAVE_EXPR nodes around everything, because assigning very simple expressions to temporaries causes us to miss good opportunities for optimizations. Among other things, the opportunity to fold in the addition of a constant into an addressing mode often gets lost, e.g. "y[i+1] += x;". In general, we take the approach that we should not make an assignment unless we are forced into it - i.e., that any non-side effect operator should be allowed, and that cse should take care of coalescing multiple utterances of the same expression should that prove fruitful. */ static tree stabilize_reference_1 (tree e) { tree result; enum tree_code code = TREE_CODE (e); /* We cannot ignore const expressions because it might be a reference to a const array but whose index contains side-effects. But we can ignore things that are actual constant or that already have been handled by this function. */ if (tree_invariant_p (e)) return e; switch (TREE_CODE_CLASS (code)) { case tcc_exceptional: /* Always wrap STATEMENT_LIST into SAVE_EXPR, even if it doesn't have side-effects. */ if (code == STATEMENT_LIST) return save_expr (e); /* FALLTHRU */ case tcc_type: case tcc_declaration: case tcc_comparison: case tcc_statement: case tcc_expression: case tcc_reference: case tcc_vl_exp: /* If the expression has side-effects, then encase it in a SAVE_EXPR so that it will only be evaluated once. */ /* The reference (r) and comparison (<) classes could be handled as below, but it is generally faster to only evaluate them once. */ if (TREE_SIDE_EFFECTS (e)) return save_expr (e); return e; case tcc_constant: /* Constants need no processing. In fact, we should never reach here. */ return e; case tcc_binary: /* Division is slow and tends to be compiled with jumps, especially the division by powers of 2 that is often found inside of an array reference. So do it just once. */ if (code == TRUNC_DIV_EXPR || code == TRUNC_MOD_EXPR || code == FLOOR_DIV_EXPR || code == FLOOR_MOD_EXPR || code == CEIL_DIV_EXPR || code == CEIL_MOD_EXPR || code == ROUND_DIV_EXPR || code == ROUND_MOD_EXPR) return save_expr (e); /* Recursively stabilize each operand. */ result = build_nt (code, stabilize_reference_1 (TREE_OPERAND (e, 0)), stabilize_reference_1 (TREE_OPERAND (e, 1))); break; case tcc_unary: /* Recursively stabilize each operand. */ result = build_nt (code, stabilize_reference_1 (TREE_OPERAND (e, 0))); break; default: gcc_unreachable (); } TREE_TYPE (result) = TREE_TYPE (e); TREE_READONLY (result) = TREE_READONLY (e); TREE_SIDE_EFFECTS (result) = TREE_SIDE_EFFECTS (e); TREE_THIS_VOLATILE (result) = TREE_THIS_VOLATILE (e); return result; } /* Stabilize a reference so that we can use it any number of times without causing its operands to be evaluated more than once. Returns the stabilized reference. This works by means of save_expr, so see the caveats in the comments about save_expr. Also allows conversion expressions whose operands are references. Any other kind of expression is returned unchanged. */ tree stabilize_reference (tree ref) { tree result; enum tree_code code = TREE_CODE (ref); switch (code) { case VAR_DECL: case PARM_DECL: case RESULT_DECL: /* No action is needed in this case. */ return ref; CASE_CONVERT: case FLOAT_EXPR: case FIX_TRUNC_EXPR: result = build_nt (code, stabilize_reference (TREE_OPERAND (ref, 0))); break; case INDIRECT_REF: result = build_nt (INDIRECT_REF, stabilize_reference_1 (TREE_OPERAND (ref, 0))); break; case COMPONENT_REF: result = build_nt (COMPONENT_REF, stabilize_reference (TREE_OPERAND (ref, 0)), TREE_OPERAND (ref, 1), NULL_TREE); break; case BIT_FIELD_REF: result = build_nt (BIT_FIELD_REF, stabilize_reference (TREE_OPERAND (ref, 0)), TREE_OPERAND (ref, 1), TREE_OPERAND (ref, 2)); REF_REVERSE_STORAGE_ORDER (result) = REF_REVERSE_STORAGE_ORDER (ref); break; case ARRAY_REF: result = build_nt (ARRAY_REF, stabilize_reference (TREE_OPERAND (ref, 0)), stabilize_reference_1 (TREE_OPERAND (ref, 1)), TREE_OPERAND (ref, 2), TREE_OPERAND (ref, 3)); break; case ARRAY_RANGE_REF: result = build_nt (ARRAY_RANGE_REF, stabilize_reference (TREE_OPERAND (ref, 0)), stabilize_reference_1 (TREE_OPERAND (ref, 1)), TREE_OPERAND (ref, 2), TREE_OPERAND (ref, 3)); break; case COMPOUND_EXPR: /* We cannot wrap the first expression in a SAVE_EXPR, as then it wouldn't be ignored. This matters when dealing with volatiles. */ return stabilize_reference_1 (ref); /* If arg isn't a kind of lvalue we recognize, make no change. Caller should recognize the error for an invalid lvalue. */ default: return ref; case ERROR_MARK: return error_mark_node; } TREE_TYPE (result) = TREE_TYPE (ref); TREE_READONLY (result) = TREE_READONLY (ref); TREE_SIDE_EFFECTS (result) = TREE_SIDE_EFFECTS (ref); TREE_THIS_VOLATILE (result) = TREE_THIS_VOLATILE (ref); return result; } /* Low-level constructors for expressions. */ /* A helper function for build1 and constant folders. Set TREE_CONSTANT, and TREE_SIDE_EFFECTS for an ADDR_EXPR. */ void recompute_tree_invariant_for_addr_expr (tree t) { tree node; bool tc = true, se = false; gcc_assert (TREE_CODE (t) == ADDR_EXPR); /* We started out assuming this address is both invariant and constant, but does not have side effects. Now go down any handled components and see if any of them involve offsets that are either non-constant or non-invariant. Also check for side-effects. ??? Note that this code makes no attempt to deal with the case where taking the address of something causes a copy due to misalignment. */ #define UPDATE_FLAGS(NODE) \ do { tree _node = (NODE); \ if (_node && !TREE_CONSTANT (_node)) tc = false; \ if (_node && TREE_SIDE_EFFECTS (_node)) se = true; } while (0) for (node = TREE_OPERAND (t, 0); handled_component_p (node); node = TREE_OPERAND (node, 0)) { /* If the first operand doesn't have an ARRAY_TYPE, this is a bogus array reference (probably made temporarily by the G++ front end), so ignore all the operands. */ if ((TREE_CODE (node) == ARRAY_REF || TREE_CODE (node) == ARRAY_RANGE_REF) && TREE_CODE (TREE_TYPE (TREE_OPERAND (node, 0))) == ARRAY_TYPE) { UPDATE_FLAGS (TREE_OPERAND (node, 1)); if (TREE_OPERAND (node, 2)) UPDATE_FLAGS (TREE_OPERAND (node, 2)); if (TREE_OPERAND (node, 3)) UPDATE_FLAGS (TREE_OPERAND (node, 3)); } /* Likewise, just because this is a COMPONENT_REF doesn't mean we have a FIELD_DECL, apparently. The G++ front end can put something else there, at least temporarily. */ else if (TREE_CODE (node) == COMPONENT_REF && TREE_CODE (TREE_OPERAND (node, 1)) == FIELD_DECL) { if (TREE_OPERAND (node, 2)) UPDATE_FLAGS (TREE_OPERAND (node, 2)); } } node = lang_hooks.expr_to_decl (node, &tc, &se); /* Now see what's inside. If it's an INDIRECT_REF, copy our properties from the address, since &(*a)->b is a form of addition. If it's a constant, the address is constant too. If it's a decl, its address is constant if the decl is static. Everything else is not constant and, furthermore, taking the address of a volatile variable is not volatile. */ if (TREE_CODE (node) == INDIRECT_REF || TREE_CODE (node) == MEM_REF) UPDATE_FLAGS (TREE_OPERAND (node, 0)); else if (CONSTANT_CLASS_P (node)) ; else if (DECL_P (node)) tc &= (staticp (node) != NULL_TREE); else { tc = false; se |= TREE_SIDE_EFFECTS (node); } TREE_CONSTANT (t) = tc; TREE_SIDE_EFFECTS (t) = se; #undef UPDATE_FLAGS } /* Build an expression of code CODE, data type TYPE, and operands as specified. Expressions and reference nodes can be created this way. Constants, decls, types and misc nodes cannot be. We define 5 non-variadic functions, from 0 to 4 arguments. This is enough for all extant tree codes. */ tree build0 (enum tree_code code, tree tt MEM_STAT_DECL) { tree t; gcc_assert (TREE_CODE_LENGTH (code) == 0); t = make_node (code PASS_MEM_STAT); TREE_TYPE (t) = tt; return t; } tree build1 (enum tree_code code, tree type, tree node MEM_STAT_DECL) { int length = sizeof (struct tree_exp); tree t; record_node_allocation_statistics (code, length); gcc_assert (TREE_CODE_LENGTH (code) == 1); t = ggc_alloc_tree_node_stat (length PASS_MEM_STAT); memset (t, 0, sizeof (struct tree_common)); TREE_SET_CODE (t, code); TREE_TYPE (t) = type; SET_EXPR_LOCATION (t, UNKNOWN_LOCATION); TREE_OPERAND (t, 0) = node; if (node && !TYPE_P (node)) { TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (node); TREE_READONLY (t) = TREE_READONLY (node); } if (TREE_CODE_CLASS (code) == tcc_statement) { if (code != DEBUG_BEGIN_STMT) TREE_SIDE_EFFECTS (t) = 1; } else switch (code) { case VA_ARG_EXPR: /* All of these have side-effects, no matter what their operands are. */ TREE_SIDE_EFFECTS (t) = 1; TREE_READONLY (t) = 0; break; case INDIRECT_REF: /* Whether a dereference is readonly has nothing to do with whether its operand is readonly. */ TREE_READONLY (t) = 0; break; case ADDR_EXPR: if (node) recompute_tree_invariant_for_addr_expr (t); break; default: if ((TREE_CODE_CLASS (code) == tcc_unary || code == VIEW_CONVERT_EXPR) && node && !TYPE_P (node) && TREE_CONSTANT (node)) TREE_CONSTANT (t) = 1; if (TREE_CODE_CLASS (code) == tcc_reference && node && TREE_THIS_VOLATILE (node)) TREE_THIS_VOLATILE (t) = 1; break; } return t; } #define PROCESS_ARG(N) \ do { \ TREE_OPERAND (t, N) = arg##N; \ if (arg##N &&!TYPE_P (arg##N)) \ { \ if (TREE_SIDE_EFFECTS (arg##N)) \ side_effects = 1; \ if (!TREE_READONLY (arg##N) \ && !CONSTANT_CLASS_P (arg##N)) \ (void) (read_only = 0); \ if (!TREE_CONSTANT (arg##N)) \ (void) (constant = 0); \ } \ } while (0) tree build2 (enum tree_code code, tree tt, tree arg0, tree arg1 MEM_STAT_DECL) { bool constant, read_only, side_effects, div_by_zero; tree t; gcc_assert (TREE_CODE_LENGTH (code) == 2); if ((code == MINUS_EXPR || code == PLUS_EXPR || code == MULT_EXPR) && arg0 && arg1 && tt && POINTER_TYPE_P (tt) /* When sizetype precision doesn't match that of pointers we need to be able to build explicit extensions or truncations of the offset argument. */ && TYPE_PRECISION (sizetype) == TYPE_PRECISION (tt)) gcc_assert (TREE_CODE (arg0) == INTEGER_CST && TREE_CODE (arg1) == INTEGER_CST); if (code == POINTER_PLUS_EXPR && arg0 && arg1 && tt) gcc_assert (POINTER_TYPE_P (tt) && POINTER_TYPE_P (TREE_TYPE (arg0)) && ptrofftype_p (TREE_TYPE (arg1))); t = make_node (code PASS_MEM_STAT); TREE_TYPE (t) = tt; /* Below, we automatically set TREE_SIDE_EFFECTS and TREE_READONLY for the result based on those same flags for the arguments. But if the arguments aren't really even `tree' expressions, we shouldn't be trying to do this. */ /* Expressions without side effects may be constant if their arguments are as well. */ constant = (TREE_CODE_CLASS (code) == tcc_comparison || TREE_CODE_CLASS (code) == tcc_binary); read_only = 1; side_effects = TREE_SIDE_EFFECTS (t); switch (code) { case TRUNC_DIV_EXPR: case CEIL_DIV_EXPR: case FLOOR_DIV_EXPR: case ROUND_DIV_EXPR: case EXACT_DIV_EXPR: case CEIL_MOD_EXPR: case FLOOR_MOD_EXPR: case ROUND_MOD_EXPR: case TRUNC_MOD_EXPR: div_by_zero = integer_zerop (arg1); break; default: div_by_zero = false; } PROCESS_ARG (0); PROCESS_ARG (1); TREE_SIDE_EFFECTS (t) = side_effects; if (code == MEM_REF) { if (arg0 && TREE_CODE (arg0) == ADDR_EXPR) { tree o = TREE_OPERAND (arg0, 0); TREE_READONLY (t) = TREE_READONLY (o); TREE_THIS_VOLATILE (t) = TREE_THIS_VOLATILE (o); } } else { TREE_READONLY (t) = read_only; /* Don't mark X / 0 as constant. */ TREE_CONSTANT (t) = constant && !div_by_zero; TREE_THIS_VOLATILE (t) = (TREE_CODE_CLASS (code) == tcc_reference && arg0 && TREE_THIS_VOLATILE (arg0)); } return t; } tree build3 (enum tree_code code, tree tt, tree arg0, tree arg1, tree arg2 MEM_STAT_DECL) { bool constant, read_only, side_effects; tree t; gcc_assert (TREE_CODE_LENGTH (code) == 3); gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp); t = make_node (code PASS_MEM_STAT); TREE_TYPE (t) = tt; read_only = 1; /* As a special exception, if COND_EXPR has NULL branches, we assume that it is a gimple statement and always consider it to have side effects. */ if (code == COND_EXPR && tt == void_type_node && arg1 == NULL_TREE && arg2 == NULL_TREE) side_effects = true; else side_effects = TREE_SIDE_EFFECTS (t); PROCESS_ARG (0); PROCESS_ARG (1); PROCESS_ARG (2); if (code == COND_EXPR) TREE_READONLY (t) = read_only; TREE_SIDE_EFFECTS (t) = side_effects; TREE_THIS_VOLATILE (t) = (TREE_CODE_CLASS (code) == tcc_reference && arg0 && TREE_THIS_VOLATILE (arg0)); return t; } tree build4 (enum tree_code code, tree tt, tree arg0, tree arg1, tree arg2, tree arg3 MEM_STAT_DECL) { bool constant, read_only, side_effects; tree t; gcc_assert (TREE_CODE_LENGTH (code) == 4); t = make_node (code PASS_MEM_STAT); TREE_TYPE (t) = tt; side_effects = TREE_SIDE_EFFECTS (t); PROCESS_ARG (0); PROCESS_ARG (1); PROCESS_ARG (2); PROCESS_ARG (3); TREE_SIDE_EFFECTS (t) = side_effects; TREE_THIS_VOLATILE (t) = (TREE_CODE_CLASS (code) == tcc_reference && arg0 && TREE_THIS_VOLATILE (arg0)); return t; } tree build5 (enum tree_code code, tree tt, tree arg0, tree arg1, tree arg2, tree arg3, tree arg4 MEM_STAT_DECL) { bool constant, read_only, side_effects; tree t; gcc_assert (TREE_CODE_LENGTH (code) == 5); t = make_node (code PASS_MEM_STAT); TREE_TYPE (t) = tt; side_effects = TREE_SIDE_EFFECTS (t); PROCESS_ARG (0); PROCESS_ARG (1); PROCESS_ARG (2); PROCESS_ARG (3); PROCESS_ARG (4); TREE_SIDE_EFFECTS (t) = side_effects; if (code == TARGET_MEM_REF) { if (arg0 && TREE_CODE (arg0) == ADDR_EXPR) { tree o = TREE_OPERAND (arg0, 0); TREE_READONLY (t) = TREE_READONLY (o); TREE_THIS_VOLATILE (t) = TREE_THIS_VOLATILE (o); } } else TREE_THIS_VOLATILE (t) = (TREE_CODE_CLASS (code) == tcc_reference && arg0 && TREE_THIS_VOLATILE (arg0)); return t; } /* Build a simple MEM_REF tree with the sematics of a plain INDIRECT_REF on the pointer PTR. */ tree build_simple_mem_ref_loc (location_t loc, tree ptr) { poly_int64 offset = 0; tree ptype = TREE_TYPE (ptr); tree tem; /* For convenience allow addresses that collapse to a simple base and offset. */ if (TREE_CODE (ptr) == ADDR_EXPR && (handled_component_p (TREE_OPERAND (ptr, 0)) || TREE_CODE (TREE_OPERAND (ptr, 0)) == MEM_REF)) { ptr = get_addr_base_and_unit_offset (TREE_OPERAND (ptr, 0), &offset); gcc_assert (ptr); if (TREE_CODE (ptr) == MEM_REF) { offset += mem_ref_offset (ptr).force_shwi (); ptr = TREE_OPERAND (ptr, 0); } else ptr = build_fold_addr_expr (ptr); gcc_assert (is_gimple_reg (ptr) || is_gimple_min_invariant (ptr)); } tem = build2 (MEM_REF, TREE_TYPE (ptype), ptr, build_int_cst (ptype, offset)); SET_EXPR_LOCATION (tem, loc); return tem; } /* Return the constant offset of a MEM_REF or TARGET_MEM_REF tree T. */ poly_offset_int mem_ref_offset (const_tree t) { return poly_offset_int::from (wi::to_poly_wide (TREE_OPERAND (t, 1)), SIGNED); } /* Return an invariant ADDR_EXPR of type TYPE taking the address of BASE offsetted by OFFSET units. */ tree build_invariant_address (tree type, tree base, poly_int64 offset) { tree ref = fold_build2 (MEM_REF, TREE_TYPE (type), build_fold_addr_expr (base), build_int_cst (ptr_type_node, offset)); tree addr = build1 (ADDR_EXPR, type, ref); recompute_tree_invariant_for_addr_expr (addr); return addr; } /* Similar except don't specify the TREE_TYPE and leave the TREE_SIDE_EFFECTS as 0. It is permissible for arguments to be null, or even garbage if their values do not matter. */ tree build_nt (enum tree_code code, ...) { tree t; int length; int i; va_list p; gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp); va_start (p, code); t = make_node (code); length = TREE_CODE_LENGTH (code); for (i = 0; i < length; i++) TREE_OPERAND (t, i) = va_arg (p, tree); va_end (p); return t; } /* Similar to build_nt, but for creating a CALL_EXPR object with a tree vec. */ tree build_nt_call_vec (tree fn, vec *args) { tree ret, t; unsigned int ix; ret = build_vl_exp (CALL_EXPR, vec_safe_length (args) + 3); CALL_EXPR_FN (ret) = fn; CALL_EXPR_STATIC_CHAIN (ret) = NULL_TREE; FOR_EACH_VEC_SAFE_ELT (args, ix, t) CALL_EXPR_ARG (ret, ix) = t; return ret; } /* Create a DECL_... node of code CODE, name NAME (if non-null) and data type TYPE. We do NOT enter this node in any sort of symbol table. LOC is the location of the decl. layout_decl is used to set up the decl's storage layout. Other slots are initialized to 0 or null pointers. */ tree build_decl (location_t loc, enum tree_code code, tree name, tree type MEM_STAT_DECL) { tree t; t = make_node (code PASS_MEM_STAT); DECL_SOURCE_LOCATION (t) = loc; /* if (type == error_mark_node) type = integer_type_node; */ /* That is not done, deliberately, so that having error_mark_node as the type can suppress useless errors in the use of this variable. */ DECL_NAME (t) = name; TREE_TYPE (t) = type; if (code == VAR_DECL || code == PARM_DECL || code == RESULT_DECL) layout_decl (t, 0); return t; } /* Builds and returns function declaration with NAME and TYPE. */ tree build_fn_decl (const char *name, tree type) { tree id = get_identifier (name); tree decl = build_decl (input_location, FUNCTION_DECL, id, type); DECL_EXTERNAL (decl) = 1; TREE_PUBLIC (decl) = 1; DECL_ARTIFICIAL (decl) = 1; TREE_NOTHROW (decl) = 1; return decl; } vec *all_translation_units; /* Builds a new translation-unit decl with name NAME, queues it in the global list of translation-unit decls and returns it. */ tree build_translation_unit_decl (tree name) { tree tu = build_decl (UNKNOWN_LOCATION, TRANSLATION_UNIT_DECL, name, NULL_TREE); TRANSLATION_UNIT_LANGUAGE (tu) = lang_hooks.name; vec_safe_push (all_translation_units, tu); return tu; } /* BLOCK nodes are used to represent the structure of binding contours and declarations, once those contours have been exited and their contents compiled. This information is used for outputting debugging info. */ tree build_block (tree vars, tree subblocks, tree supercontext, tree chain) { tree block = make_node (BLOCK); BLOCK_VARS (block) = vars; BLOCK_SUBBLOCKS (block) = subblocks; BLOCK_SUPERCONTEXT (block) = supercontext; BLOCK_CHAIN (block) = chain; return block; } /* Like SET_EXPR_LOCATION, but make sure the tree can have a location. LOC is the location to use in tree T. */ void protected_set_expr_location (tree t, location_t loc) { if (CAN_HAVE_LOCATION_P (t)) SET_EXPR_LOCATION (t, loc); else if (t && TREE_CODE (t) == STATEMENT_LIST) { t = expr_single (t); if (t && CAN_HAVE_LOCATION_P (t)) SET_EXPR_LOCATION (t, loc); } } /* Like PROTECTED_SET_EXPR_LOCATION, but only do that if T has UNKNOWN_LOCATION. */ void protected_set_expr_location_if_unset (tree t, location_t loc) { t = expr_single (t); if (t && !EXPR_HAS_LOCATION (t)) protected_set_expr_location (t, loc); } /* Data used when collecting DECLs and TYPEs for language data removal. */ class free_lang_data_d { public: free_lang_data_d () : decls (100), types (100) {} /* Worklist to avoid excessive recursion. */ auto_vec worklist; /* Set of traversed objects. Used to avoid duplicate visits. */ hash_set pset; /* Array of symbols to process with free_lang_data_in_decl. */ auto_vec decls; /* Array of types to process with free_lang_data_in_type. */ auto_vec types; }; /* Add type or decl T to one of the list of tree nodes that need their language data removed. The lists are held inside FLD. */ static void add_tree_to_fld_list (tree t, class free_lang_data_d *fld) { if (DECL_P (t)) fld->decls.safe_push (t); else if (TYPE_P (t)) fld->types.safe_push (t); else gcc_unreachable (); } /* Push tree node T into FLD->WORKLIST. */ static inline void fld_worklist_push (tree t, class free_lang_data_d *fld) { if (t && !is_lang_specific (t) && !fld->pset.contains (t)) fld->worklist.safe_push ((t)); } /* Return simplified TYPE_NAME of TYPE. */ static tree fld_simplified_type_name (tree type) { if (!TYPE_NAME (type) || TREE_CODE (TYPE_NAME (type)) != TYPE_DECL) return TYPE_NAME (type); /* Drop TYPE_DECLs in TYPE_NAME in favor of the identifier in the TYPE_DECL if the type doesn't have linkage. this must match fld_ */ if (type != TYPE_MAIN_VARIANT (type) || (!DECL_ASSEMBLER_NAME_SET_P (TYPE_NAME (type)) && (TREE_CODE (type) != RECORD_TYPE || !TYPE_BINFO (type) || !BINFO_VTABLE (TYPE_BINFO (type))))) return DECL_NAME (TYPE_NAME (type)); return TYPE_NAME (type); } /* Do same comparsion as check_qualified_type skipping lang part of type and be more permissive about type names: we only care that names are same (for diagnostics) and that ODR names are the same. If INNER_TYPE is non-NULL, be sure that TREE_TYPE match it. */ static bool fld_type_variant_equal_p (tree t, tree v, tree inner_type) { if (TYPE_QUALS (t) != TYPE_QUALS (v) /* We want to match incomplete variants with complete types. In this case we need to ignore alignment. */ || ((!RECORD_OR_UNION_TYPE_P (t) || COMPLETE_TYPE_P (v)) && (TYPE_ALIGN (t) != TYPE_ALIGN (v) || TYPE_USER_ALIGN (t) != TYPE_USER_ALIGN (v))) || fld_simplified_type_name (t) != fld_simplified_type_name (v) || !attribute_list_equal (TYPE_ATTRIBUTES (t), TYPE_ATTRIBUTES (v)) || (inner_type && TREE_TYPE (v) != inner_type)) return false; return true; } /* Find variant of FIRST that match T and create new one if necessary. Set TREE_TYPE to INNER_TYPE if non-NULL. */ static tree fld_type_variant (tree first, tree t, class free_lang_data_d *fld, tree inner_type = NULL) { if (first == TYPE_MAIN_VARIANT (t)) return t; for (tree v = first; v; v = TYPE_NEXT_VARIANT (v)) if (fld_type_variant_equal_p (t, v, inner_type)) return v; tree v = build_variant_type_copy (first); TYPE_READONLY (v) = TYPE_READONLY (t); TYPE_VOLATILE (v) = TYPE_VOLATILE (t); TYPE_ATOMIC (v) = TYPE_ATOMIC (t); TYPE_RESTRICT (v) = TYPE_RESTRICT (t); TYPE_ADDR_SPACE (v) = TYPE_ADDR_SPACE (t); TYPE_NAME (v) = TYPE_NAME (t); TYPE_ATTRIBUTES (v) = TYPE_ATTRIBUTES (t); TYPE_CANONICAL (v) = TYPE_CANONICAL (t); /* Variants of incomplete types should have alignment set to BITS_PER_UNIT. Do not copy the actual alignment. */ if (!RECORD_OR_UNION_TYPE_P (v) || COMPLETE_TYPE_P (v)) { SET_TYPE_ALIGN (v, TYPE_ALIGN (t)); TYPE_USER_ALIGN (v) = TYPE_USER_ALIGN (t); } if (inner_type) TREE_TYPE (v) = inner_type; gcc_checking_assert (fld_type_variant_equal_p (t,v, inner_type)); if (!fld->pset.add (v)) add_tree_to_fld_list (v, fld); return v; } /* Map complete types to incomplete types. */ static hash_map *fld_incomplete_types; /* Map types to simplified types. */ static hash_map *fld_simplified_types; /* Produce variant of T whose TREE_TYPE is T2. If it is main variant, use MAP to prevent duplicates. */ static tree fld_process_array_type (tree t, tree t2, hash_map *map, class free_lang_data_d *fld) { if (TREE_TYPE (t) == t2) return t; if (TYPE_MAIN_VARIANT (t) != t) { return fld_type_variant (fld_process_array_type (TYPE_MAIN_VARIANT (t), TYPE_MAIN_VARIANT (t2), map, fld), t, fld, t2); } bool existed; tree &array = map->get_or_insert (t, &existed); if (!existed) { array = build_array_type_1 (t2, TYPE_DOMAIN (t), TYPE_TYPELESS_STORAGE (t), false, false); TYPE_CANONICAL (array) = TYPE_CANONICAL (t); if (!fld->pset.add (array)) add_tree_to_fld_list (array, fld); } return array; } /* Return CTX after removal of contexts that are not relevant */ static tree fld_decl_context (tree ctx) { /* Variably modified types are needed for tree_is_indexable to decide whether the type needs to go to local or global section. This code is semi-broken but for now it is easiest to keep contexts as expected. */ if (ctx && TYPE_P (ctx) && !variably_modified_type_p (ctx, NULL_TREE)) { while (ctx && TYPE_P (ctx)) ctx = TYPE_CONTEXT (ctx); } return ctx; } /* For T being aggregate type try to turn it into a incomplete variant. Return T if no simplification is possible. */ static tree fld_incomplete_type_of (tree t, class free_lang_data_d *fld) { if (!t) return NULL; if (POINTER_TYPE_P (t)) { tree t2 = fld_incomplete_type_of (TREE_TYPE (t), fld); if (t2 != TREE_TYPE (t)) { tree first; if (TREE_CODE (t) == POINTER_TYPE) first = build_pointer_type_for_mode (t2, TYPE_MODE (t), TYPE_REF_CAN_ALIAS_ALL (t)); else first = build_reference_type_for_mode (t2, TYPE_MODE (t), TYPE_REF_CAN_ALIAS_ALL (t)); gcc_assert (TYPE_CANONICAL (t2) != t2 && TYPE_CANONICAL (t2) == TYPE_CANONICAL (TREE_TYPE (t))); if (!fld->pset.add (first)) add_tree_to_fld_list (first, fld); return fld_type_variant (first, t, fld); } return t; } if (TREE_CODE (t) == ARRAY_TYPE) return fld_process_array_type (t, fld_incomplete_type_of (TREE_TYPE (t), fld), fld_incomplete_types, fld); if ((!RECORD_OR_UNION_TYPE_P (t) && TREE_CODE (t) != ENUMERAL_TYPE) || !COMPLETE_TYPE_P (t)) return t; if (TYPE_MAIN_VARIANT (t) == t) { bool existed; tree © = fld_incomplete_types->get_or_insert (t, &existed); if (!existed) { copy = build_distinct_type_copy (t); /* It is possible that type was not seen by free_lang_data yet. */ if (!fld->pset.add (copy)) add_tree_to_fld_list (copy, fld); TYPE_SIZE (copy) = NULL; TYPE_USER_ALIGN (copy) = 0; TYPE_SIZE_UNIT (copy) = NULL; TYPE_CANONICAL (copy) = TYPE_CANONICAL (t); TREE_ADDRESSABLE (copy) = 0; if (AGGREGATE_TYPE_P (t)) { SET_TYPE_MODE (copy, VOIDmode); SET_TYPE_ALIGN (copy, BITS_PER_UNIT); TYPE_TYPELESS_STORAGE (copy) = 0; TYPE_FIELDS (copy) = NULL; TYPE_BINFO (copy) = NULL; TYPE_FINAL_P (copy) = 0; TYPE_EMPTY_P (copy) = 0; } else { TYPE_VALUES (copy) = NULL; ENUM_IS_OPAQUE (copy) = 0; ENUM_IS_SCOPED (copy) = 0; } /* Build copy of TYPE_DECL in TYPE_NAME if necessary. This is needed for ODR violation warnings to come out right (we want duplicate TYPE_DECLs whenever the type is duplicated because of ODR violation. Because lang data in the TYPE_DECL may not have been freed yet, rebuild it from scratch and copy relevant fields. */ TYPE_NAME (copy) = fld_simplified_type_name (copy); tree name = TYPE_NAME (copy); if (name && TREE_CODE (name) == TYPE_DECL) { gcc_checking_assert (TREE_TYPE (name) == t); tree name2 = build_decl (DECL_SOURCE_LOCATION (name), TYPE_DECL, DECL_NAME (name), copy); if (DECL_ASSEMBLER_NAME_SET_P (name)) SET_DECL_ASSEMBLER_NAME (name2, DECL_ASSEMBLER_NAME (name)); SET_DECL_ALIGN (name2, 0); DECL_CONTEXT (name2) = fld_decl_context (DECL_CONTEXT (name)); TYPE_NAME (copy) = name2; } } return copy; } return (fld_type_variant (fld_incomplete_type_of (TYPE_MAIN_VARIANT (t), fld), t, fld)); } /* Simplify type T for scenarios where we do not need complete pointer types. */ static tree fld_simplified_type (tree t, class free_lang_data_d *fld) { if (!t) return t; if (POINTER_TYPE_P (t)) return fld_incomplete_type_of (t, fld); /* FIXME: This triggers verification error, see PR88140. */ if (TREE_CODE (t) == ARRAY_TYPE && 0) return fld_process_array_type (t, fld_simplified_type (TREE_TYPE (t), fld), fld_simplified_types, fld); return t; } /* Reset the expression *EXPR_P, a size or position. ??? We could reset all non-constant sizes or positions. But it's cheap enough to not do so and refrain from adding workarounds to dwarf2out.c. We need to reset self-referential sizes or positions because they cannot be gimplified and thus can contain a CALL_EXPR after the gimplification is finished, which will run afoul of LTO streaming. And they need to be reset to something essentially dummy but not constant, so as to preserve the properties of the object they are attached to. */ static inline void free_lang_data_in_one_sizepos (tree *expr_p) { tree expr = *expr_p; if (CONTAINS_PLACEHOLDER_P (expr)) *expr_p = build0 (PLACEHOLDER_EXPR, TREE_TYPE (expr)); } /* Reset all the fields in a binfo node BINFO. We only keep BINFO_VTABLE, which is used by gimple_fold_obj_type_ref. */ static void free_lang_data_in_binfo (tree binfo) { unsigned i; tree t; gcc_assert (TREE_CODE (binfo) == TREE_BINFO); BINFO_VIRTUALS (binfo) = NULL_TREE; BINFO_BASE_ACCESSES (binfo) = NULL; BINFO_INHERITANCE_CHAIN (binfo) = NULL_TREE; BINFO_SUBVTT_INDEX (binfo) = NULL_TREE; BINFO_VPTR_FIELD (binfo) = NULL_TREE; TREE_PUBLIC (binfo) = 0; FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (binfo), i, t) free_lang_data_in_binfo (t); } /* Reset all language specific information still present in TYPE. */ static void free_lang_data_in_type (tree type, class free_lang_data_d *fld) { gcc_assert (TYPE_P (type)); /* Give the FE a chance to remove its own data first. */ lang_hooks.free_lang_data (type); TREE_LANG_FLAG_0 (type) = 0; TREE_LANG_FLAG_1 (type) = 0; TREE_LANG_FLAG_2 (type) = 0; TREE_LANG_FLAG_3 (type) = 0; TREE_LANG_FLAG_4 (type) = 0; TREE_LANG_FLAG_5 (type) = 0; TREE_LANG_FLAG_6 (type) = 0; TYPE_NEEDS_CONSTRUCTING (type) = 0; /* Purge non-marked variants from the variants chain, so that they don't reappear in the IL after free_lang_data. */ while (TYPE_NEXT_VARIANT (type) && !fld->pset.contains (TYPE_NEXT_VARIANT (type))) { tree t = TYPE_NEXT_VARIANT (type); TYPE_NEXT_VARIANT (type) = TYPE_NEXT_VARIANT (t); /* Turn the removed types into distinct types. */ TYPE_MAIN_VARIANT (t) = t; TYPE_NEXT_VARIANT (t) = NULL_TREE; } if (TREE_CODE (type) == FUNCTION_TYPE) { TREE_TYPE (type) = fld_simplified_type (TREE_TYPE (type), fld); /* Remove the const and volatile qualifiers from arguments. The C++ front end removes them, but the C front end does not, leading to false ODR violation errors when merging two instances of the same function signature compiled by different front ends. */ for (tree p = TYPE_ARG_TYPES (type); p; p = TREE_CHAIN (p)) { TREE_VALUE (p) = fld_simplified_type (TREE_VALUE (p), fld); tree arg_type = TREE_VALUE (p); if (TYPE_READONLY (arg_type) || TYPE_VOLATILE (arg_type)) { int quals = TYPE_QUALS (arg_type) & ~TYPE_QUAL_CONST & ~TYPE_QUAL_VOLATILE; TREE_VALUE (p) = build_qualified_type (arg_type, quals); if (!fld->pset.add (TREE_VALUE (p))) free_lang_data_in_type (TREE_VALUE (p), fld); } /* C++ FE uses TREE_PURPOSE to store initial values. */ TREE_PURPOSE (p) = NULL; } } else if (TREE_CODE (type) == METHOD_TYPE) { TREE_TYPE (type) = fld_simplified_type (TREE_TYPE (type), fld); for (tree p = TYPE_ARG_TYPES (type); p; p = TREE_CHAIN (p)) { /* C++ FE uses TREE_PURPOSE to store initial values. */ TREE_VALUE (p) = fld_simplified_type (TREE_VALUE (p), fld); TREE_PURPOSE (p) = NULL; } } else if (RECORD_OR_UNION_TYPE_P (type)) { /* Remove members that are not FIELD_DECLs from the field list of an aggregate. These occur in C++. */ for (tree *prev = &TYPE_FIELDS (type), member; (member = *prev);) if (TREE_CODE (member) == FIELD_DECL) prev = &DECL_CHAIN (member); else *prev = DECL_CHAIN (member); TYPE_VFIELD (type) = NULL_TREE; if (TYPE_BINFO (type)) { free_lang_data_in_binfo (TYPE_BINFO (type)); /* We need to preserve link to bases and virtual table for all polymorphic types to make devirtualization machinery working. */ if (!BINFO_VTABLE (TYPE_BINFO (type))) TYPE_BINFO (type) = NULL; } } else if (INTEGRAL_TYPE_P (type) || SCALAR_FLOAT_TYPE_P (type) || FIXED_POINT_TYPE_P (type)) { if (TREE_CODE (type) == ENUMERAL_TYPE) { ENUM_IS_OPAQUE (type) = 0; ENUM_IS_SCOPED (type) = 0; /* Type values are used only for C++ ODR checking. Drop them for all type variants and non-ODR types. For ODR types the data is freed in free_odr_warning_data. */ if (!TYPE_VALUES (type)) ; else if (TYPE_MAIN_VARIANT (type) != type || !type_with_linkage_p (type) || type_in_anonymous_namespace_p (type)) TYPE_VALUES (type) = NULL; else register_odr_enum (type); } free_lang_data_in_one_sizepos (&TYPE_MIN_VALUE (type)); free_lang_data_in_one_sizepos (&TYPE_MAX_VALUE (type)); } TYPE_LANG_SLOT_1 (type) = NULL_TREE; free_lang_data_in_one_sizepos (&TYPE_SIZE (type)); free_lang_data_in_one_sizepos (&TYPE_SIZE_UNIT (type)); if (TYPE_CONTEXT (type) && TREE_CODE (TYPE_CONTEXT (type)) == BLOCK) { tree ctx = TYPE_CONTEXT (type); do { ctx = BLOCK_SUPERCONTEXT (ctx); } while (ctx && TREE_CODE (ctx) == BLOCK); TYPE_CONTEXT (type) = ctx; } TYPE_STUB_DECL (type) = NULL; TYPE_NAME (type) = fld_simplified_type_name (type); } /* Return true if DECL may need an assembler name to be set. */ static inline bool need_assembler_name_p (tree decl) { /* We use DECL_ASSEMBLER_NAME to hold mangled type names for One Definition Rule merging. This makes type_odr_p to return true on those types during LTO and by comparing the mangled name, we can say what types are intended to be equivalent across compilation unit. We do not store names of type_in_anonymous_namespace_p. Record, union and enumeration type have linkage that allows use to check type_in_anonymous_namespace_p. We do not mangle compound types that always can be compared structurally. Similarly for builtin types, we compare properties of their main variant. A special case are integer types where mangling do make differences between char/signed char/unsigned char etc. Storing name for these makes e.g. -fno-signed-char/-fsigned-char mismatches to be handled well. See cp/mangle.c:write_builtin_type for details. */ if (TREE_CODE (decl) == TYPE_DECL) { if (DECL_NAME (decl) && decl == TYPE_NAME (TREE_TYPE (decl)) && TYPE_MAIN_VARIANT (TREE_TYPE (decl)) == TREE_TYPE (decl) && !TYPE_ARTIFICIAL (TREE_TYPE (decl)) && ((TREE_CODE (TREE_TYPE (decl)) != RECORD_TYPE && TREE_CODE (TREE_TYPE (decl)) != UNION_TYPE) || TYPE_CXX_ODR_P (TREE_TYPE (decl))) && (type_with_linkage_p (TREE_TYPE (decl)) || TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE) && !variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) return !DECL_ASSEMBLER_NAME_SET_P (decl); return false; } /* Only FUNCTION_DECLs and VAR_DECLs are considered. */ if (!VAR_OR_FUNCTION_DECL_P (decl)) return false; /* If DECL already has its assembler name set, it does not need a new one. */ if (!HAS_DECL_ASSEMBLER_NAME_P (decl) || DECL_ASSEMBLER_NAME_SET_P (decl)) return false; /* Abstract decls do not need an assembler name. */ if (DECL_ABSTRACT_P (decl)) return false; /* For VAR_DECLs, only static, public and external symbols need an assembler name. */ if (VAR_P (decl) && !TREE_STATIC (decl) && !TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) return false; if (TREE_CODE (decl) == FUNCTION_DECL) { /* Do not set assembler name on builtins. Allow RTL expansion to decide whether to expand inline or via a regular call. */ if (fndecl_built_in_p (decl) && DECL_BUILT_IN_CLASS (decl) != BUILT_IN_FRONTEND) return false; /* Functions represented in the callgraph need an assembler name. */ if (cgraph_node::get (decl) != NULL) return true; /* Unused and not public functions don't need an assembler name. */ if (!TREE_USED (decl) && !TREE_PUBLIC (decl)) return false; } return true; } /* Reset all language specific information still present in symbol DECL. */ static void free_lang_data_in_decl (tree decl, class free_lang_data_d *fld) { gcc_assert (DECL_P (decl)); /* Give the FE a chance to remove its own data first. */ lang_hooks.free_lang_data (decl); TREE_LANG_FLAG_0 (decl) = 0; TREE_LANG_FLAG_1 (decl) = 0; TREE_LANG_FLAG_2 (decl) = 0; TREE_LANG_FLAG_3 (decl) = 0; TREE_LANG_FLAG_4 (decl) = 0; TREE_LANG_FLAG_5 (decl) = 0; TREE_LANG_FLAG_6 (decl) = 0; free_lang_data_in_one_sizepos (&DECL_SIZE (decl)); free_lang_data_in_one_sizepos (&DECL_SIZE_UNIT (decl)); if (TREE_CODE (decl) == FIELD_DECL) { DECL_FCONTEXT (decl) = NULL; free_lang_data_in_one_sizepos (&DECL_FIELD_OFFSET (decl)); if (TREE_CODE (DECL_CONTEXT (decl)) == QUAL_UNION_TYPE) DECL_QUALIFIER (decl) = NULL_TREE; } if (TREE_CODE (decl) == FUNCTION_DECL) { struct cgraph_node *node; /* Frontends do not set TREE_ADDRESSABLE on public variables even though the address may be taken in other unit, so this flag has no practical use for middle-end. It would make more sense if frontends set TREE_ADDRESSABLE to 0 only for public objects that indeed cannot be adressed, but it is not the case. Set the flag to true so we do not get merge failures for i.e. virtual tables between units that take address of it and units that don't. */ if (TREE_PUBLIC (decl)) TREE_ADDRESSABLE (decl) = true; TREE_TYPE (decl) = fld_simplified_type (TREE_TYPE (decl), fld); if (!(node = cgraph_node::get (decl)) || (!node->definition && !node->clones)) { if (node) node->release_body (); else { release_function_body (decl); DECL_ARGUMENTS (decl) = NULL; DECL_RESULT (decl) = NULL; DECL_INITIAL (decl) = error_mark_node; } } if (gimple_has_body_p (decl) || (node && node->thunk)) { tree t; /* If DECL has a gimple body, then the context for its arguments must be DECL. Otherwise, it doesn't really matter, as we will not be emitting any code for DECL. In general, there may be other instances of DECL created by the front end and since PARM_DECLs are generally shared, their DECL_CONTEXT changes as the replicas of DECL are created. The only time where DECL_CONTEXT is important is for the FUNCTION_DECLs that have a gimple body (since the PARM_DECL will be used in the function's body). */ for (t = DECL_ARGUMENTS (decl); t; t = TREE_CHAIN (t)) DECL_CONTEXT (t) = decl; if (!DECL_FUNCTION_SPECIFIC_TARGET (decl)) DECL_FUNCTION_SPECIFIC_TARGET (decl) = target_option_default_node; if (!DECL_FUNCTION_SPECIFIC_OPTIMIZATION (decl)) DECL_FUNCTION_SPECIFIC_OPTIMIZATION (decl) = optimization_default_node; } /* DECL_SAVED_TREE holds the GENERIC representation for DECL. At this point, it is not needed anymore. */ DECL_SAVED_TREE (decl) = NULL_TREE; /* Clear the abstract origin if it refers to a method. Otherwise dwarf2out.c will ICE as we splice functions out of TYPE_FIELDS and thus the origin will not be output correctly. */ if (DECL_ABSTRACT_ORIGIN (decl) && DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl)) && RECORD_OR_UNION_TYPE_P (DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl)))) DECL_ABSTRACT_ORIGIN (decl) = NULL_TREE; DECL_VINDEX (decl) = NULL_TREE; } else if (VAR_P (decl)) { /* See comment above why we set the flag for functions. */ if (TREE_PUBLIC (decl)) TREE_ADDRESSABLE (decl) = true; if ((DECL_EXTERNAL (decl) && (!TREE_STATIC (decl) || !TREE_READONLY (decl))) || (decl_function_context (decl) && !TREE_STATIC (decl))) DECL_INITIAL (decl) = NULL_TREE; } else if (TREE_CODE (decl) == TYPE_DECL) { DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT; DECL_VISIBILITY_SPECIFIED (decl) = 0; TREE_PUBLIC (decl) = 0; TREE_PRIVATE (decl) = 0; DECL_ARTIFICIAL (decl) = 0; TYPE_DECL_SUPPRESS_DEBUG (decl) = 0; DECL_INITIAL (decl) = NULL_TREE; DECL_ORIGINAL_TYPE (decl) = NULL_TREE; DECL_MODE (decl) = VOIDmode; SET_DECL_ALIGN (decl, 0); /* TREE_TYPE is cleared at WPA time in free_odr_warning_data. */ } else if (TREE_CODE (decl) == FIELD_DECL) { TREE_TYPE (decl) = fld_simplified_type (TREE_TYPE (decl), fld); DECL_INITIAL (decl) = NULL_TREE; } else if (TREE_CODE (decl) == TRANSLATION_UNIT_DECL && DECL_INITIAL (decl) && TREE_CODE (DECL_INITIAL (decl)) == BLOCK) { /* Strip builtins from the translation-unit BLOCK. We still have targets without builtin_decl_explicit support and also builtins are shared nodes and thus we can't use TREE_CHAIN in multiple lists. */ tree *nextp = &BLOCK_VARS (DECL_INITIAL (decl)); while (*nextp) { tree var = *nextp; if (TREE_CODE (var) == FUNCTION_DECL && fndecl_built_in_p (var)) *nextp = TREE_CHAIN (var); else nextp = &TREE_CHAIN (var); } } /* We need to keep field decls associated with their trees. Otherwise tree merging may merge some fileds and keep others disjoint wich in turn will not do well with TREE_CHAIN pointers linking them. Also do not drop containing types for virtual methods and tables because these are needed by devirtualization. C++ destructors are special because C++ frontends sometimes produces virtual destructor as an alias of non-virtual destructor. In devirutalization code we always walk through aliases and we need context to be preserved too. See PR89335 */ if (TREE_CODE (decl) != FIELD_DECL && ((TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL) || (!DECL_VIRTUAL_P (decl) && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_CXX_DESTRUCTOR_P (decl))))) DECL_CONTEXT (decl) = fld_decl_context (DECL_CONTEXT (decl)); } /* Operand callback helper for free_lang_data_in_node. *TP is the subtree operand being considered. */ static tree find_decls_types_r (tree *tp, int *ws, void *data) { tree t = *tp; class free_lang_data_d *fld = (class free_lang_data_d *) data; if (TREE_CODE (t) == TREE_LIST) return NULL_TREE; /* Language specific nodes will be removed, so there is no need to gather anything under them. */ if (is_lang_specific (t)) { *ws = 0; return NULL_TREE; } if (DECL_P (t)) { /* Note that walk_tree does not traverse every possible field in decls, so we have to do our own traversals here. */ add_tree_to_fld_list (t, fld); fld_worklist_push (DECL_NAME (t), fld); fld_worklist_push (DECL_CONTEXT (t), fld); fld_worklist_push (DECL_SIZE (t), fld); fld_worklist_push (DECL_SIZE_UNIT (t), fld); /* We are going to remove everything under DECL_INITIAL for TYPE_DECLs. No point walking them. */ if (TREE_CODE (t) != TYPE_DECL) fld_worklist_push (DECL_INITIAL (t), fld); fld_worklist_push (DECL_ATTRIBUTES (t), fld); fld_worklist_push (DECL_ABSTRACT_ORIGIN (t), fld); if (TREE_CODE (t) == FUNCTION_DECL) { fld_worklist_push (DECL_ARGUMENTS (t), fld); fld_worklist_push (DECL_RESULT (t), fld); } else if (TREE_CODE (t) == FIELD_DECL) { fld_worklist_push (DECL_FIELD_OFFSET (t), fld); fld_worklist_push (DECL_BIT_FIELD_TYPE (t), fld); fld_worklist_push (DECL_FIELD_BIT_OFFSET (t), fld); fld_worklist_push (DECL_FCONTEXT (t), fld); } if ((VAR_P (t) || TREE_CODE (t) == PARM_DECL) && DECL_HAS_VALUE_EXPR_P (t)) fld_worklist_push (DECL_VALUE_EXPR (t), fld); if (TREE_CODE (t) != FIELD_DECL && TREE_CODE (t) != TYPE_DECL) fld_worklist_push (TREE_CHAIN (t), fld); *ws = 0; } else if (TYPE_P (t)) { /* Note that walk_tree does not traverse every possible field in types, so we have to do our own traversals here. */ add_tree_to_fld_list (t, fld); if (!RECORD_OR_UNION_TYPE_P (t)) fld_worklist_push (TYPE_CACHED_VALUES (t), fld); fld_worklist_push (TYPE_SIZE (t), fld); fld_worklist_push (TYPE_SIZE_UNIT (t), fld); fld_worklist_push (TYPE_ATTRIBUTES (t), fld); fld_worklist_push (TYPE_POINTER_TO (t), fld); fld_worklist_push (TYPE_REFERENCE_TO (t), fld); fld_worklist_push (TYPE_NAME (t), fld); /* While we do not stream TYPE_POINTER_TO and TYPE_REFERENCE_TO lists, we may look types up in these lists and use them while optimizing the function body. Thus we need to free lang data in them. */ if (TREE_CODE (t) == POINTER_TYPE) fld_worklist_push (TYPE_NEXT_PTR_TO (t), fld); if (TREE_CODE (t) == REFERENCE_TYPE) fld_worklist_push (TYPE_NEXT_REF_TO (t), fld); if (!POINTER_TYPE_P (t)) fld_worklist_push (TYPE_MIN_VALUE_RAW (t), fld); /* TYPE_MAX_VALUE_RAW is TYPE_BINFO for record types. */ if (!RECORD_OR_UNION_TYPE_P (t)) fld_worklist_push (TYPE_MAX_VALUE_RAW (t), fld); fld_worklist_push (TYPE_MAIN_VARIANT (t), fld); /* Do not walk TYPE_NEXT_VARIANT. We do not stream it and thus do not and want not to reach unused variants this way. */ if (TYPE_CONTEXT (t)) { tree ctx = TYPE_CONTEXT (t); /* We adjust BLOCK TYPE_CONTEXTs to the innermost non-BLOCK one. So push that instead. */ while (ctx && TREE_CODE (ctx) == BLOCK) ctx = BLOCK_SUPERCONTEXT (ctx); fld_worklist_push (ctx, fld); } fld_worklist_push (TYPE_CANONICAL (t), fld); if (RECORD_OR_UNION_TYPE_P (t) && TYPE_BINFO (t)) { unsigned i; tree tem; FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (TYPE_BINFO (t)), i, tem) fld_worklist_push (TREE_TYPE (tem), fld); fld_worklist_push (BINFO_TYPE (TYPE_BINFO (t)), fld); fld_worklist_push (BINFO_VTABLE (TYPE_BINFO (t)), fld); } if (RECORD_OR_UNION_TYPE_P (t)) { tree tem; /* Push all TYPE_FIELDS - there can be interleaving interesting and non-interesting things. */ tem = TYPE_FIELDS (t); while (tem) { if (TREE_CODE (tem) == FIELD_DECL) fld_worklist_push (tem, fld); tem = TREE_CHAIN (tem); } } if (FUNC_OR_METHOD_TYPE_P (t)) fld_worklist_push (TYPE_METHOD_BASETYPE (t), fld); fld_worklist_push (TYPE_STUB_DECL (t), fld); *ws = 0; } else if (TREE_CODE (t) == BLOCK) { for (tree *tem = &BLOCK_VARS (t); *tem; ) { if (TREE_CODE (*tem) != LABEL_DECL && (TREE_CODE (*tem) != VAR_DECL || !auto_var_in_fn_p (*tem, DECL_CONTEXT (*tem)))) { gcc_assert (TREE_CODE (*tem) != RESULT_DECL && TREE_CODE (*tem) != PARM_DECL); *tem = TREE_CHAIN (*tem); } else { fld_worklist_push (*tem, fld); tem = &TREE_CHAIN (*tem); } } for (tree tem = BLOCK_SUBBLOCKS (t); tem; tem = BLOCK_CHAIN (tem)) fld_worklist_push (tem, fld); fld_worklist_push (BLOCK_ABSTRACT_ORIGIN (t), fld); } if (TREE_CODE (t) != IDENTIFIER_NODE && CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPED)) fld_worklist_push (TREE_TYPE (t), fld); return NULL_TREE; } /* Find decls and types in T. */ static void find_decls_types (tree t, class free_lang_data_d *fld) { while (1) { if (!fld->pset.contains (t)) walk_tree (&t, find_decls_types_r, fld, &fld->pset); if (fld->worklist.is_empty ()) break; t = fld->worklist.pop (); } } /* Translate all the types in LIST with the corresponding runtime types. */ static tree get_eh_types_for_runtime (tree list) { tree head, prev; if (list == NULL_TREE) return NULL_TREE; head = build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list))); prev = head; list = TREE_CHAIN (list); while (list) { tree n = build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list))); TREE_CHAIN (prev) = n; prev = TREE_CHAIN (prev); list = TREE_CHAIN (list); } return head; } /* Find decls and types referenced in EH region R and store them in FLD->DECLS and FLD->TYPES. */ static void find_decls_types_in_eh_region (eh_region r, class free_lang_data_d *fld) { switch (r->type) { case ERT_CLEANUP: break; case ERT_TRY: { eh_catch c; /* The types referenced in each catch must first be changed to the EH types used at runtime. This removes references to FE types in the region. */ for (c = r->u.eh_try.first_catch; c ; c = c->next_catch) { c->type_list = get_eh_types_for_runtime (c->type_list); walk_tree (&c->type_list, find_decls_types_r, fld, &fld->pset); } } break; case ERT_ALLOWED_EXCEPTIONS: r->u.allowed.type_list = get_eh_types_for_runtime (r->u.allowed.type_list); walk_tree (&r->u.allowed.type_list, find_decls_types_r, fld, &fld->pset); break; case ERT_MUST_NOT_THROW: walk_tree (&r->u.must_not_throw.failure_decl, find_decls_types_r, fld, &fld->pset); break; } } /* Find decls and types referenced in cgraph node N and store them in FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will look for *every* kind of DECL and TYPE node reachable from N, including those embedded inside types and decls (i.e,, TYPE_DECLs, NAMESPACE_DECLs, etc). */ static void find_decls_types_in_node (struct cgraph_node *n, class free_lang_data_d *fld) { basic_block bb; struct function *fn; unsigned ix; tree t; find_decls_types (n->decl, fld); if (!gimple_has_body_p (n->decl)) return; gcc_assert (current_function_decl == NULL_TREE && cfun == NULL); fn = DECL_STRUCT_FUNCTION (n->decl); /* Traverse locals. */ FOR_EACH_LOCAL_DECL (fn, ix, t) find_decls_types (t, fld); /* Traverse EH regions in FN. */ { eh_region r; FOR_ALL_EH_REGION_FN (r, fn) find_decls_types_in_eh_region (r, fld); } /* Traverse every statement in FN. */ FOR_EACH_BB_FN (bb, fn) { gphi_iterator psi; gimple_stmt_iterator si; unsigned i; for (psi = gsi_start_phis (bb); !gsi_end_p (psi); gsi_next (&psi)) { gphi *phi = psi.phi (); for (i = 0; i < gimple_phi_num_args (phi); i++) { tree *arg_p = gimple_phi_arg_def_ptr (phi, i); find_decls_types (*arg_p, fld); } } for (si = gsi_start_bb (bb); !gsi_end_p (si); gsi_next (&si)) { gimple *stmt = gsi_stmt (si); if (is_gimple_call (stmt)) find_decls_types (gimple_call_fntype (stmt), fld); for (i = 0; i < gimple_num_ops (stmt); i++) { tree arg = gimple_op (stmt, i); find_decls_types (arg, fld); /* find_decls_types doesn't walk TREE_PURPOSE of TREE_LISTs, which we need for asm stmts. */ if (arg && TREE_CODE (arg) == TREE_LIST && TREE_PURPOSE (arg) && gimple_code (stmt) == GIMPLE_ASM) find_decls_types (TREE_PURPOSE (arg), fld); } } } } /* Find decls and types referenced in varpool node N and store them in FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will look for *every* kind of DECL and TYPE node reachable from N, including those embedded inside types and decls (i.e,, TYPE_DECLs, NAMESPACE_DECLs, etc). */ static void find_decls_types_in_var (varpool_node *v, class free_lang_data_d *fld) { find_decls_types (v->decl, fld); } /* If T needs an assembler name, have one created for it. */ void assign_assembler_name_if_needed (tree t) { if (need_assembler_name_p (t)) { /* When setting DECL_ASSEMBLER_NAME, the C++ mangler may emit diagnostics that use input_location to show locus information. The problem here is that, at this point, input_location is generally anchored to the end of the file (since the parser is long gone), so we don't have a good position to pin it to. To alleviate this problem, this uses the location of T's declaration. Examples of this are testsuite/g++.dg/template/cond2.C and testsuite/g++.dg/template/pr35240.C. */ location_t saved_location = input_location; input_location = DECL_SOURCE_LOCATION (t); decl_assembler_name (t); input_location = saved_location; } } /* Free language specific information for every operand and expression in every node of the call graph. This process operates in three stages: 1- Every callgraph node and varpool node is traversed looking for decls and types embedded in them. This is a more exhaustive search than that done by find_referenced_vars, because it will also collect individual fields, decls embedded in types, etc. 2- All the decls found are sent to free_lang_data_in_decl. 3- All the types found are sent to free_lang_data_in_type. The ordering between decls and types is important because free_lang_data_in_decl sets assembler names, which includes mangling. So types cannot be freed up until assembler names have been set up. */ static void free_lang_data_in_cgraph (class free_lang_data_d *fld) { struct cgraph_node *n; varpool_node *v; tree t; unsigned i; alias_pair *p; /* Find decls and types in the body of every function in the callgraph. */ FOR_EACH_FUNCTION (n) find_decls_types_in_node (n, fld); FOR_EACH_VEC_SAFE_ELT (alias_pairs, i, p) find_decls_types (p->decl, fld); /* Find decls and types in every varpool symbol. */ FOR_EACH_VARIABLE (v) find_decls_types_in_var (v, fld); /* Set the assembler name on every decl found. We need to do this now because free_lang_data_in_decl will invalidate data needed for mangling. This breaks mangling on interdependent decls. */ FOR_EACH_VEC_ELT (fld->decls, i, t) assign_assembler_name_if_needed (t); /* Traverse every decl found freeing its language data. */ FOR_EACH_VEC_ELT (fld->decls, i, t) free_lang_data_in_decl (t, fld); /* Traverse every type found freeing its language data. */ FOR_EACH_VEC_ELT (fld->types, i, t) free_lang_data_in_type (t, fld); } /* Free resources that are used by FE but are not needed once they are done. */ static unsigned free_lang_data (void) { unsigned i; class free_lang_data_d fld; /* If we are the LTO frontend we have freed lang-specific data already. */ if (in_lto_p || (!flag_generate_lto && !flag_generate_offload)) { /* Rebuild type inheritance graph even when not doing LTO to get consistent profile data. */ rebuild_type_inheritance_graph (); return 0; } fld_incomplete_types = new hash_map; fld_simplified_types = new hash_map; /* Provide a dummy TRANSLATION_UNIT_DECL if the FE failed to provide one. */ if (vec_safe_is_empty (all_translation_units)) build_translation_unit_decl (NULL_TREE); /* Allocate and assign alias sets to the standard integer types while the slots are still in the way the frontends generated them. */ for (i = 0; i < itk_none; ++i) if (integer_types[i]) TYPE_ALIAS_SET (integer_types[i]) = get_alias_set (integer_types[i]); /* Traverse the IL resetting language specific information for operands, expressions, etc. */ free_lang_data_in_cgraph (&fld); /* Create gimple variants for common types. */ for (unsigned i = 0; i < sizeof (builtin_structptr_types) / sizeof (builtin_structptr_type); ++i) builtin_structptr_types[i].node = builtin_structptr_types[i].base; /* Reset some langhooks. Do not reset types_compatible_p, it may still be used indirectly via the get_alias_set langhook. */ lang_hooks.dwarf_name = lhd_dwarf_name; lang_hooks.decl_printable_name = gimple_decl_printable_name; lang_hooks.gimplify_expr = lhd_gimplify_expr; lang_hooks.overwrite_decl_assembler_name = lhd_overwrite_decl_assembler_name; lang_hooks.print_xnode = lhd_print_tree_nothing; lang_hooks.print_decl = lhd_print_tree_nothing; lang_hooks.print_type = lhd_print_tree_nothing; lang_hooks.print_identifier = lhd_print_tree_nothing; lang_hooks.tree_inlining.var_mod_type_p = hook_bool_tree_tree_false; if (flag_checking) { int i; tree t; FOR_EACH_VEC_ELT (fld.types, i, t) verify_type (t); } /* We do not want the default decl_assembler_name implementation, rather if we have fixed everything we want a wrapper around it asserting that all non-local symbols already got their assembler name and only produce assembler names for local symbols. Or rather make sure we never call decl_assembler_name on local symbols and devise a separate, middle-end private scheme for it. */ /* Reset diagnostic machinery. */ tree_diagnostics_defaults (global_dc); rebuild_type_inheritance_graph (); delete fld_incomplete_types; delete fld_simplified_types; return 0; } namespace { const pass_data pass_data_ipa_free_lang_data = { SIMPLE_IPA_PASS, /* type */ "*free_lang_data", /* name */ OPTGROUP_NONE, /* optinfo_flags */ TV_IPA_FREE_LANG_DATA, /* tv_id */ 0, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ 0, /* todo_flags_finish */ }; class pass_ipa_free_lang_data : public simple_ipa_opt_pass { public: pass_ipa_free_lang_data (gcc::context *ctxt) : simple_ipa_opt_pass (pass_data_ipa_free_lang_data, ctxt) {} /* opt_pass methods: */ virtual unsigned int execute (function *) { return free_lang_data (); } }; // class pass_ipa_free_lang_data } // anon namespace simple_ipa_opt_pass * make_pass_ipa_free_lang_data (gcc::context *ctxt) { return new pass_ipa_free_lang_data (ctxt); } /* Set the type qualifiers for TYPE to TYPE_QUALS, which is a bitmask of the various TYPE_QUAL values. */ static void set_type_quals (tree type, int type_quals) { TYPE_READONLY (type) = (type_quals & TYPE_QUAL_CONST) != 0; TYPE_VOLATILE (type) = (type_quals & TYPE_QUAL_VOLATILE) != 0; TYPE_RESTRICT (type) = (type_quals & TYPE_QUAL_RESTRICT) != 0; TYPE_ATOMIC (type) = (type_quals & TYPE_QUAL_ATOMIC) != 0; TYPE_ADDR_SPACE (type) = DECODE_QUAL_ADDR_SPACE (type_quals); } /* Returns true iff CAND and BASE have equivalent language-specific qualifiers. */ bool check_lang_type (const_tree cand, const_tree base) { if (lang_hooks.types.type_hash_eq == NULL) return true; /* type_hash_eq currently only applies to these types. */ if (TREE_CODE (cand) != FUNCTION_TYPE && TREE_CODE (cand) != METHOD_TYPE) return true; return lang_hooks.types.type_hash_eq (cand, base); } /* This function checks to see if TYPE matches the size one of the built-in atomic types, and returns that core atomic type. */ static tree find_atomic_core_type (const_tree type) { tree base_atomic_type; /* Only handle complete types. */ if (!tree_fits_uhwi_p (TYPE_SIZE (type))) return NULL_TREE; switch (tree_to_uhwi (TYPE_SIZE (type))) { case 8: base_atomic_type = atomicQI_type_node; break; case 16: base_atomic_type = atomicHI_type_node; break; case 32: base_atomic_type = atomicSI_type_node; break; case 64: base_atomic_type = atomicDI_type_node; break; case 128: base_atomic_type = atomicTI_type_node; break; default: base_atomic_type = NULL_TREE; } return base_atomic_type; } /* Returns true iff unqualified CAND and BASE are equivalent. */ bool check_base_type (const_tree cand, const_tree base) { if (TYPE_NAME (cand) != TYPE_NAME (base) /* Apparently this is needed for Objective-C. */ || TYPE_CONTEXT (cand) != TYPE_CONTEXT (base) || !attribute_list_equal (TYPE_ATTRIBUTES (cand), TYPE_ATTRIBUTES (base))) return false; /* Check alignment. */ if (TYPE_ALIGN (cand) == TYPE_ALIGN (base)) return true; /* Atomic types increase minimal alignment. We must to do so as well or we get duplicated canonical types. See PR88686. */ if ((TYPE_QUALS (cand) & TYPE_QUAL_ATOMIC)) { /* See if this object can map to a basic atomic type. */ tree atomic_type = find_atomic_core_type (cand); if (atomic_type && TYPE_ALIGN (atomic_type) == TYPE_ALIGN (cand)) return true; } return false; } /* Returns true iff CAND is equivalent to BASE with TYPE_QUALS. */ bool check_qualified_type (const_tree cand, const_tree base, int type_quals) { return (TYPE_QUALS (cand) == type_quals && check_base_type (cand, base) && check_lang_type (cand, base)); } /* Returns true iff CAND is equivalent to BASE with ALIGN. */ static bool check_aligned_type (const_tree cand, const_tree base, unsigned int align) { return (TYPE_QUALS (cand) == TYPE_QUALS (base) && TYPE_NAME (cand) == TYPE_NAME (base) /* Apparently this is needed for Objective-C. */ && TYPE_CONTEXT (cand) == TYPE_CONTEXT (base) /* Check alignment. */ && TYPE_ALIGN (cand) == align && attribute_list_equal (TYPE_ATTRIBUTES (cand), TYPE_ATTRIBUTES (base)) && check_lang_type (cand, base)); } /* Return a version of the TYPE, qualified as indicated by the TYPE_QUALS, if one exists. If no qualified version exists yet, return NULL_TREE. */ tree get_qualified_type (tree type, int type_quals) { if (TYPE_QUALS (type) == type_quals) return type; tree mv = TYPE_MAIN_VARIANT (type); if (check_qualified_type (mv, type, type_quals)) return mv; /* Search the chain of variants to see if there is already one there just like the one we need to have. If so, use that existing one. We must preserve the TYPE_NAME, since there is code that depends on this. */ for (tree *tp = &TYPE_NEXT_VARIANT (mv); *tp; tp = &TYPE_NEXT_VARIANT (*tp)) if (check_qualified_type (*tp, type, type_quals)) { /* Put the found variant at the head of the variant list so frequently searched variants get found faster. The C++ FE benefits greatly from this. */ tree t = *tp; *tp = TYPE_NEXT_VARIANT (t); TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (mv); TYPE_NEXT_VARIANT (mv) = t; return t; } return NULL_TREE; } /* Like get_qualified_type, but creates the type if it does not exist. This function never returns NULL_TREE. */ tree build_qualified_type (tree type, int type_quals MEM_STAT_DECL) { tree t; /* See if we already have the appropriate qualified variant. */ t = get_qualified_type (type, type_quals); /* If not, build it. */ if (!t) { t = build_variant_type_copy (type PASS_MEM_STAT); set_type_quals (t, type_quals); if (((type_quals & TYPE_QUAL_ATOMIC) == TYPE_QUAL_ATOMIC)) { /* See if this object can map to a basic atomic type. */ tree atomic_type = find_atomic_core_type (type); if (atomic_type) { /* Ensure the alignment of this type is compatible with the required alignment of the atomic type. */ if (TYPE_ALIGN (atomic_type) > TYPE_ALIGN (t)) SET_TYPE_ALIGN (t, TYPE_ALIGN (atomic_type)); } } if (TYPE_STRUCTURAL_EQUALITY_P (type)) /* Propagate structural equality. */ SET_TYPE_STRUCTURAL_EQUALITY (t); else if (TYPE_CANONICAL (type) != type) /* Build the underlying canonical type, since it is different from TYPE. */ { tree c = build_qualified_type (TYPE_CANONICAL (type), type_quals); TYPE_CANONICAL (t) = TYPE_CANONICAL (c); } else /* T is its own canonical type. */ TYPE_CANONICAL (t) = t; } return t; } /* Create a variant of type T with alignment ALIGN. */ tree build_aligned_type (tree type, unsigned int align) { tree t; if (TYPE_PACKED (type) || TYPE_ALIGN (type) == align) return type; for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) if (check_aligned_type (t, type, align)) return t; t = build_variant_type_copy (type); SET_TYPE_ALIGN (t, align); TYPE_USER_ALIGN (t) = 1; return t; } /* Create a new distinct copy of TYPE. The new type is made its own MAIN_VARIANT. If TYPE requires structural equality checks, the resulting type requires structural equality checks; otherwise, its TYPE_CANONICAL points to itself. */ tree build_distinct_type_copy (tree type MEM_STAT_DECL) { tree t = copy_node (type PASS_MEM_STAT); TYPE_POINTER_TO (t) = 0; TYPE_REFERENCE_TO (t) = 0; /* Set the canonical type either to a new equivalence class, or propagate the need for structural equality checks. */ if (TYPE_STRUCTURAL_EQUALITY_P (type)) SET_TYPE_STRUCTURAL_EQUALITY (t); else TYPE_CANONICAL (t) = t; /* Make it its own variant. */ TYPE_MAIN_VARIANT (t) = t; TYPE_NEXT_VARIANT (t) = 0; /* Note that it is now possible for TYPE_MIN_VALUE to be a value whose TREE_TYPE is not t. This can also happen in the Ada frontend when using subtypes. */ return t; } /* Create a new variant of TYPE, equivalent but distinct. This is so the caller can modify it. TYPE_CANONICAL for the return type will be equivalent to TYPE_CANONICAL of TYPE, indicating that the types are considered equal by the language itself (or that both types require structural equality checks). */ tree build_variant_type_copy (tree type MEM_STAT_DECL) { tree t, m = TYPE_MAIN_VARIANT (type); t = build_distinct_type_copy (type PASS_MEM_STAT); /* Since we're building a variant, assume that it is a non-semantic variant. This also propagates TYPE_STRUCTURAL_EQUALITY_P. */ TYPE_CANONICAL (t) = TYPE_CANONICAL (type); /* Type variants have no alias set defined. */ TYPE_ALIAS_SET (t) = -1; /* Add the new type to the chain of variants of TYPE. */ TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (m); TYPE_NEXT_VARIANT (m) = t; TYPE_MAIN_VARIANT (t) = m; return t; } /* Return true if the from tree in both tree maps are equal. */ int tree_map_base_eq (const void *va, const void *vb) { const struct tree_map_base *const a = (const struct tree_map_base *) va, *const b = (const struct tree_map_base *) vb; return (a->from == b->from); } /* Hash a from tree in a tree_base_map. */ unsigned int tree_map_base_hash (const void *item) { return htab_hash_pointer (((const struct tree_map_base *)item)->from); } /* Return true if this tree map structure is marked for garbage collection purposes. We simply return true if the from tree is marked, so that this structure goes away when the from tree goes away. */ int tree_map_base_marked_p (const void *p) { return ggc_marked_p (((const struct tree_map_base *) p)->from); } /* Hash a from tree in a tree_map. */ unsigned int tree_map_hash (const void *item) { return (((const struct tree_map *) item)->hash); } /* Hash a from tree in a tree_decl_map. */ unsigned int tree_decl_map_hash (const void *item) { return DECL_UID (((const struct tree_decl_map *) item)->base.from); } /* Return the initialization priority for DECL. */ priority_type decl_init_priority_lookup (tree decl) { symtab_node *snode = symtab_node::get (decl); if (!snode) return DEFAULT_INIT_PRIORITY; return snode->get_init_priority (); } /* Return the finalization priority for DECL. */ priority_type decl_fini_priority_lookup (tree decl) { cgraph_node *node = cgraph_node::get (decl); if (!node) return DEFAULT_INIT_PRIORITY; return node->get_fini_priority (); } /* Set the initialization priority for DECL to PRIORITY. */ void decl_init_priority_insert (tree decl, priority_type priority) { struct symtab_node *snode; if (priority == DEFAULT_INIT_PRIORITY) { snode = symtab_node::get (decl); if (!snode) return; } else if (VAR_P (decl)) snode = varpool_node::get_create (decl); else snode = cgraph_node::get_create (decl); snode->set_init_priority (priority); } /* Set the finalization priority for DECL to PRIORITY. */ void decl_fini_priority_insert (tree decl, priority_type priority) { struct cgraph_node *node; if (priority == DEFAULT_INIT_PRIORITY) { node = cgraph_node::get (decl); if (!node) return; } else node = cgraph_node::get_create (decl); node->set_fini_priority (priority); } /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */ static void print_debug_expr_statistics (void) { fprintf (stderr, "DECL_DEBUG_EXPR hash: size %ld, %ld elements, %f collisions\n", (long) debug_expr_for_decl->size (), (long) debug_expr_for_decl->elements (), debug_expr_for_decl->collisions ()); } /* Print out the statistics for the DECL_VALUE_EXPR hash table. */ static void print_value_expr_statistics (void) { fprintf (stderr, "DECL_VALUE_EXPR hash: size %ld, %ld elements, %f collisions\n", (long) value_expr_for_decl->size (), (long) value_expr_for_decl->elements (), value_expr_for_decl->collisions ()); } /* Lookup a debug expression for FROM, and return it if we find one. */ tree decl_debug_expr_lookup (tree from) { struct tree_decl_map *h, in; in.base.from = from; h = debug_expr_for_decl->find_with_hash (&in, DECL_UID (from)); if (h) return h->to; return NULL_TREE; } /* Insert a mapping FROM->TO in the debug expression hashtable. */ void decl_debug_expr_insert (tree from, tree to) { struct tree_decl_map *h; h = ggc_alloc (); h->base.from = from; h->to = to; *debug_expr_for_decl->find_slot_with_hash (h, DECL_UID (from), INSERT) = h; } /* Lookup a value expression for FROM, and return it if we find one. */ tree decl_value_expr_lookup (tree from) { struct tree_decl_map *h, in; in.base.from = from; h = value_expr_for_decl->find_with_hash (&in, DECL_UID (from)); if (h) return h->to; return NULL_TREE; } /* Insert a mapping FROM->TO in the value expression hashtable. */ void decl_value_expr_insert (tree from, tree to) { struct tree_decl_map *h; h = ggc_alloc (); h->base.from = from; h->to = to; *value_expr_for_decl->find_slot_with_hash (h, DECL_UID (from), INSERT) = h; } /* Lookup a vector of debug arguments for FROM, and return it if we find one. */ vec ** decl_debug_args_lookup (tree from) { struct tree_vec_map *h, in; if (!DECL_HAS_DEBUG_ARGS_P (from)) return NULL; gcc_checking_assert (debug_args_for_decl != NULL); in.base.from = from; h = debug_args_for_decl->find_with_hash (&in, DECL_UID (from)); if (h) return &h->to; return NULL; } /* Insert a mapping FROM->empty vector of debug arguments in the value expression hashtable. */ vec ** decl_debug_args_insert (tree from) { struct tree_vec_map *h; tree_vec_map **loc; if (DECL_HAS_DEBUG_ARGS_P (from)) return decl_debug_args_lookup (from); if (debug_args_for_decl == NULL) debug_args_for_decl = hash_table::create_ggc (64); h = ggc_alloc (); h->base.from = from; h->to = NULL; loc = debug_args_for_decl->find_slot_with_hash (h, DECL_UID (from), INSERT); *loc = h; DECL_HAS_DEBUG_ARGS_P (from) = 1; return &h->to; } /* Hashing of types so that we don't make duplicates. The entry point is `type_hash_canon'. */ /* Generate the default hash code for TYPE. This is designed for speed, rather than maximum entropy. */ hashval_t type_hash_canon_hash (tree type) { inchash::hash hstate; hstate.add_int (TREE_CODE (type)); if (TREE_TYPE (type)) hstate.add_object (TYPE_HASH (TREE_TYPE (type))); for (tree t = TYPE_ATTRIBUTES (type); t; t = TREE_CHAIN (t)) /* Just the identifier is adequate to distinguish. */ hstate.add_object (IDENTIFIER_HASH_VALUE (get_attribute_name (t))); switch (TREE_CODE (type)) { case METHOD_TYPE: hstate.add_object (TYPE_HASH (TYPE_METHOD_BASETYPE (type))); /* FALLTHROUGH. */ case FUNCTION_TYPE: for (tree t = TYPE_ARG_TYPES (type); t; t = TREE_CHAIN (t)) if (TREE_VALUE (t) != error_mark_node) hstate.add_object (TYPE_HASH (TREE_VALUE (t))); break; case OFFSET_TYPE: hstate.add_object (TYPE_HASH (TYPE_OFFSET_BASETYPE (type))); break; case ARRAY_TYPE: { if (TYPE_DOMAIN (type)) hstate.add_object (TYPE_HASH (TYPE_DOMAIN (type))); if (!AGGREGATE_TYPE_P (TREE_TYPE (type))) { unsigned typeless = TYPE_TYPELESS_STORAGE (type); hstate.add_object (typeless); } } break; case INTEGER_TYPE: { tree t = TYPE_MAX_VALUE (type); if (!t) t = TYPE_MIN_VALUE (type); for (int i = 0; i < TREE_INT_CST_NUNITS (t); i++) hstate.add_object (TREE_INT_CST_ELT (t, i)); break; } case REAL_TYPE: case FIXED_POINT_TYPE: { unsigned prec = TYPE_PRECISION (type); hstate.add_object (prec); break; } case VECTOR_TYPE: hstate.add_poly_int (TYPE_VECTOR_SUBPARTS (type)); break; default: break; } return hstate.end (); } /* These are the Hashtable callback functions. */ /* Returns true iff the types are equivalent. */ bool type_cache_hasher::equal (type_hash *a, type_hash *b) { /* First test the things that are the same for all types. */ if (a->hash != b->hash || TREE_CODE (a->type) != TREE_CODE (b->type) || TREE_TYPE (a->type) != TREE_TYPE (b->type) || !attribute_list_equal (TYPE_ATTRIBUTES (a->type), TYPE_ATTRIBUTES (b->type)) || (TREE_CODE (a->type) != COMPLEX_TYPE && TYPE_NAME (a->type) != TYPE_NAME (b->type))) return 0; /* Be careful about comparing arrays before and after the element type has been completed; don't compare TYPE_ALIGN unless both types are complete. */ if (COMPLETE_TYPE_P (a->type) && COMPLETE_TYPE_P (b->type) && (TYPE_ALIGN (a->type) != TYPE_ALIGN (b->type) || TYPE_MODE (a->type) != TYPE_MODE (b->type))) return 0; switch (TREE_CODE (a->type)) { case VOID_TYPE: case OPAQUE_TYPE: case COMPLEX_TYPE: case POINTER_TYPE: case REFERENCE_TYPE: case NULLPTR_TYPE: return 1; case VECTOR_TYPE: return known_eq (TYPE_VECTOR_SUBPARTS (a->type), TYPE_VECTOR_SUBPARTS (b->type)); case ENUMERAL_TYPE: if (TYPE_VALUES (a->type) != TYPE_VALUES (b->type) && !(TYPE_VALUES (a->type) && TREE_CODE (TYPE_VALUES (a->type)) == TREE_LIST && TYPE_VALUES (b->type) && TREE_CODE (TYPE_VALUES (b->type)) == TREE_LIST && type_list_equal (TYPE_VALUES (a->type), TYPE_VALUES (b->type)))) return 0; /* fall through */ case INTEGER_TYPE: case REAL_TYPE: case BOOLEAN_TYPE: if (TYPE_PRECISION (a->type) != TYPE_PRECISION (b->type)) return false; return ((TYPE_MAX_VALUE (a->type) == TYPE_MAX_VALUE (b->type) || tree_int_cst_equal (TYPE_MAX_VALUE (a->type), TYPE_MAX_VALUE (b->type))) && (TYPE_MIN_VALUE (a->type) == TYPE_MIN_VALUE (b->type) || tree_int_cst_equal (TYPE_MIN_VALUE (a->type), TYPE_MIN_VALUE (b->type)))); case FIXED_POINT_TYPE: return TYPE_SATURATING (a->type) == TYPE_SATURATING (b->type); case OFFSET_TYPE: return TYPE_OFFSET_BASETYPE (a->type) == TYPE_OFFSET_BASETYPE (b->type); case METHOD_TYPE: if (TYPE_METHOD_BASETYPE (a->type) == TYPE_METHOD_BASETYPE (b->type) && (TYPE_ARG_TYPES (a->type) == TYPE_ARG_TYPES (b->type) || (TYPE_ARG_TYPES (a->type) && TREE_CODE (TYPE_ARG_TYPES (a->type)) == TREE_LIST && TYPE_ARG_TYPES (b->type) && TREE_CODE (TYPE_ARG_TYPES (b->type)) == TREE_LIST && type_list_equal (TYPE_ARG_TYPES (a->type), TYPE_ARG_TYPES (b->type))))) break; return 0; case ARRAY_TYPE: /* Don't compare TYPE_TYPELESS_STORAGE flag on aggregates, where the flag should be inherited from the element type and can change after ARRAY_TYPEs are created; on non-aggregates compare it and hash it, scalars will never have that flag set and we need to differentiate between arrays created by different front-ends or middle-end created arrays. */ return (TYPE_DOMAIN (a->type) == TYPE_DOMAIN (b->type) && (AGGREGATE_TYPE_P (TREE_TYPE (a->type)) || (TYPE_TYPELESS_STORAGE (a->type) == TYPE_TYPELESS_STORAGE (b->type)))); case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: return (TYPE_FIELDS (a->type) == TYPE_FIELDS (b->type) || (TYPE_FIELDS (a->type) && TREE_CODE (TYPE_FIELDS (a->type)) == TREE_LIST && TYPE_FIELDS (b->type) && TREE_CODE (TYPE_FIELDS (b->type)) == TREE_LIST && type_list_equal (TYPE_FIELDS (a->type), TYPE_FIELDS (b->type)))); case FUNCTION_TYPE: if (TYPE_ARG_TYPES (a->type) == TYPE_ARG_TYPES (b->type) || (TYPE_ARG_TYPES (a->type) && TREE_CODE (TYPE_ARG_TYPES (a->type)) == TREE_LIST && TYPE_ARG_TYPES (b->type) && TREE_CODE (TYPE_ARG_TYPES (b->type)) == TREE_LIST && type_list_equal (TYPE_ARG_TYPES (a->type), TYPE_ARG_TYPES (b->type)))) break; return 0; default: return 0; } if (lang_hooks.types.type_hash_eq != NULL) return lang_hooks.types.type_hash_eq (a->type, b->type); return 1; } /* Given TYPE, and HASHCODE its hash code, return the canonical object for an identical type if one already exists. Otherwise, return TYPE, and record it as the canonical object. To use this function, first create a type of the sort you want. Then compute its hash code from the fields of the type that make it different from other similar types. Then call this function and use the value. */ tree type_hash_canon (unsigned int hashcode, tree type) { type_hash in; type_hash **loc; /* The hash table only contains main variants, so ensure that's what we're being passed. */ gcc_assert (TYPE_MAIN_VARIANT (type) == type); /* The TYPE_ALIGN field of a type is set by layout_type(), so we must call that routine before comparing TYPE_ALIGNs. */ layout_type (type); in.hash = hashcode; in.type = type; loc = type_hash_table->find_slot_with_hash (&in, hashcode, INSERT); if (*loc) { tree t1 = ((type_hash *) *loc)->type; gcc_assert (TYPE_MAIN_VARIANT (t1) == t1 && t1 != type); if (TYPE_UID (type) + 1 == next_type_uid) --next_type_uid; /* Free also min/max values and the cache for integer types. This can't be done in free_node, as LTO frees those on its own. */ if (TREE_CODE (type) == INTEGER_TYPE) { if (TYPE_MIN_VALUE (type) && TREE_TYPE (TYPE_MIN_VALUE (type)) == type) { /* Zero is always in TYPE_CACHED_VALUES. */ if (! TYPE_UNSIGNED (type)) int_cst_hash_table->remove_elt (TYPE_MIN_VALUE (type)); ggc_free (TYPE_MIN_VALUE (type)); } if (TYPE_MAX_VALUE (type) && TREE_TYPE (TYPE_MAX_VALUE (type)) == type) { int_cst_hash_table->remove_elt (TYPE_MAX_VALUE (type)); ggc_free (TYPE_MAX_VALUE (type)); } if (TYPE_CACHED_VALUES_P (type)) ggc_free (TYPE_CACHED_VALUES (type)); } free_node (type); return t1; } else { struct type_hash *h; h = ggc_alloc (); h->hash = hashcode; h->type = type; *loc = h; return type; } } static void print_type_hash_statistics (void) { fprintf (stderr, "Type hash: size %ld, %ld elements, %f collisions\n", (long) type_hash_table->size (), (long) type_hash_table->elements (), type_hash_table->collisions ()); } /* Given two lists of types (chains of TREE_LIST nodes with types in the TREE_VALUE slots) return 1 if the lists contain the same types in the same order. Also, the TREE_PURPOSEs must match. */ bool type_list_equal (const_tree l1, const_tree l2) { const_tree t1, t2; for (t1 = l1, t2 = l2; t1 && t2; t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2)) if (TREE_VALUE (t1) != TREE_VALUE (t2) || (TREE_PURPOSE (t1) != TREE_PURPOSE (t2) && ! (1 == simple_cst_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2)) && (TREE_TYPE (TREE_PURPOSE (t1)) == TREE_TYPE (TREE_PURPOSE (t2)))))) return false; return t1 == t2; } /* Returns the number of arguments to the FUNCTION_TYPE or METHOD_TYPE given by TYPE. If the argument list accepts variable arguments, then this function counts only the ordinary arguments. */ int type_num_arguments (const_tree fntype) { int i = 0; for (tree t = TYPE_ARG_TYPES (fntype); t; t = TREE_CHAIN (t)) /* If the function does not take a variable number of arguments, the last element in the list will have type `void'. */ if (VOID_TYPE_P (TREE_VALUE (t))) break; else ++i; return i; } /* Return the type of the function TYPE's argument ARGNO if known. For vararg function's where ARGNO refers to one of the variadic arguments return null. Otherwise, return a void_type_node for out-of-bounds ARGNO. */ tree type_argument_type (const_tree fntype, unsigned argno) { /* Treat zero the same as an out-of-bounds argument number. */ if (!argno) return void_type_node; function_args_iterator iter; tree argtype; unsigned i = 1; FOREACH_FUNCTION_ARGS (fntype, argtype, iter) { /* A vararg function's argument list ends in a null. Otherwise, an ordinary function's argument list ends with void. Return null if ARGNO refers to a vararg argument, void_type_node if it's out of bounds, and the formal argument type otherwise. */ if (!argtype) break; if (i == argno || VOID_TYPE_P (argtype)) return argtype; ++i; } return NULL_TREE; } /* Nonzero if integer constants T1 and T2 represent the same constant value. */ int tree_int_cst_equal (const_tree t1, const_tree t2) { if (t1 == t2) return 1; if (t1 == 0 || t2 == 0) return 0; STRIP_ANY_LOCATION_WRAPPER (t1); STRIP_ANY_LOCATION_WRAPPER (t2); if (TREE_CODE (t1) == INTEGER_CST && TREE_CODE (t2) == INTEGER_CST && wi::to_widest (t1) == wi::to_widest (t2)) return 1; return 0; } /* Return true if T is an INTEGER_CST whose numerical value (extended according to TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. */ bool tree_fits_shwi_p (const_tree t) { return (t != NULL_TREE && TREE_CODE (t) == INTEGER_CST && wi::fits_shwi_p (wi::to_widest (t))); } /* Return true if T is an INTEGER_CST or POLY_INT_CST whose numerical value (extended according to TYPE_UNSIGNED) fits in a poly_int64. */ bool tree_fits_poly_int64_p (const_tree t) { if (t == NULL_TREE) return false; if (POLY_INT_CST_P (t)) { for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; i++) if (!wi::fits_shwi_p (wi::to_wide (POLY_INT_CST_COEFF (t, i)))) return false; return true; } return (TREE_CODE (t) == INTEGER_CST && wi::fits_shwi_p (wi::to_widest (t))); } /* Return true if T is an INTEGER_CST whose numerical value (extended according to TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. */ bool tree_fits_uhwi_p (const_tree t) { return (t != NULL_TREE && TREE_CODE (t) == INTEGER_CST && wi::fits_uhwi_p (wi::to_widest (t))); } /* Return true if T is an INTEGER_CST or POLY_INT_CST whose numerical value (extended according to TYPE_UNSIGNED) fits in a poly_uint64. */ bool tree_fits_poly_uint64_p (const_tree t) { if (t == NULL_TREE) return false; if (POLY_INT_CST_P (t)) { for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; i++) if (!wi::fits_uhwi_p (wi::to_widest (POLY_INT_CST_COEFF (t, i)))) return false; return true; } return (TREE_CODE (t) == INTEGER_CST && wi::fits_uhwi_p (wi::to_widest (t))); } /* T is an INTEGER_CST whose numerical value (extended according to TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. Return that HOST_WIDE_INT. */ HOST_WIDE_INT tree_to_shwi (const_tree t) { gcc_assert (tree_fits_shwi_p (t)); return TREE_INT_CST_LOW (t); } /* T is an INTEGER_CST whose numerical value (extended according to TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. Return that HOST_WIDE_INT. */ unsigned HOST_WIDE_INT tree_to_uhwi (const_tree t) { gcc_assert (tree_fits_uhwi_p (t)); return TREE_INT_CST_LOW (t); } /* Return the most significant (sign) bit of T. */ int tree_int_cst_sign_bit (const_tree t) { unsigned bitno = TYPE_PRECISION (TREE_TYPE (t)) - 1; return wi::extract_uhwi (wi::to_wide (t), bitno, 1); } /* Return an indication of the sign of the integer constant T. The return value is -1 if T < 0, 0 if T == 0, and 1 if T > 0. Note that -1 will never be returned if T's type is unsigned. */ int tree_int_cst_sgn (const_tree t) { if (wi::to_wide (t) == 0) return 0; else if (TYPE_UNSIGNED (TREE_TYPE (t))) return 1; else if (wi::neg_p (wi::to_wide (t))) return -1; else return 1; } /* Return the minimum number of bits needed to represent VALUE in a signed or unsigned type, UNSIGNEDP says which. */ unsigned int tree_int_cst_min_precision (tree value, signop sgn) { /* If the value is negative, compute its negative minus 1. The latter adjustment is because the absolute value of the largest negative value is one larger than the largest positive value. This is equivalent to a bit-wise negation, so use that operation instead. */ if (tree_int_cst_sgn (value) < 0) value = fold_build1 (BIT_NOT_EXPR, TREE_TYPE (value), value); /* Return the number of bits needed, taking into account the fact that we need one more bit for a signed than unsigned type. If value is 0 or -1, the minimum precision is 1 no matter whether unsignedp is true or false. */ if (integer_zerop (value)) return 1; else return tree_floor_log2 (value) + 1 + (sgn == SIGNED ? 1 : 0) ; } /* Return truthvalue of whether T1 is the same tree structure as T2. Return 1 if they are the same. Return 0 if they are understandably different. Return -1 if either contains tree structure not understood by this function. */ int simple_cst_equal (const_tree t1, const_tree t2) { enum tree_code code1, code2; int cmp; int i; if (t1 == t2) return 1; if (t1 == 0 || t2 == 0) return 0; /* For location wrappers to be the same, they must be at the same source location (and wrap the same thing). */ if (location_wrapper_p (t1) && location_wrapper_p (t2)) { if (EXPR_LOCATION (t1) != EXPR_LOCATION (t2)) return 0; return simple_cst_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); } code1 = TREE_CODE (t1); code2 = TREE_CODE (t2); if (CONVERT_EXPR_CODE_P (code1) || code1 == NON_LVALUE_EXPR) { if (CONVERT_EXPR_CODE_P (code2) || code2 == NON_LVALUE_EXPR) return simple_cst_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); else return simple_cst_equal (TREE_OPERAND (t1, 0), t2); } else if (CONVERT_EXPR_CODE_P (code2) || code2 == NON_LVALUE_EXPR) return simple_cst_equal (t1, TREE_OPERAND (t2, 0)); if (code1 != code2) return 0; switch (code1) { case INTEGER_CST: return wi::to_widest (t1) == wi::to_widest (t2); case REAL_CST: return real_identical (&TREE_REAL_CST (t1), &TREE_REAL_CST (t2)); case FIXED_CST: return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1), TREE_FIXED_CST (t2)); case STRING_CST: return (TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2) && ! memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2), TREE_STRING_LENGTH (t1))); case CONSTRUCTOR: { unsigned HOST_WIDE_INT idx; vec *v1 = CONSTRUCTOR_ELTS (t1); vec *v2 = CONSTRUCTOR_ELTS (t2); if (vec_safe_length (v1) != vec_safe_length (v2)) return false; for (idx = 0; idx < vec_safe_length (v1); ++idx) /* ??? Should we handle also fields here? */ if (!simple_cst_equal ((*v1)[idx].value, (*v2)[idx].value)) return false; return true; } case SAVE_EXPR: return simple_cst_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); case CALL_EXPR: cmp = simple_cst_equal (CALL_EXPR_FN (t1), CALL_EXPR_FN (t2)); if (cmp <= 0) return cmp; if (call_expr_nargs (t1) != call_expr_nargs (t2)) return 0; { const_tree arg1, arg2; const_call_expr_arg_iterator iter1, iter2; for (arg1 = first_const_call_expr_arg (t1, &iter1), arg2 = first_const_call_expr_arg (t2, &iter2); arg1 && arg2; arg1 = next_const_call_expr_arg (&iter1), arg2 = next_const_call_expr_arg (&iter2)) { cmp = simple_cst_equal (arg1, arg2); if (cmp <= 0) return cmp; } return arg1 == arg2; } case TARGET_EXPR: /* Special case: if either target is an unallocated VAR_DECL, it means that it's going to be unified with whatever the TARGET_EXPR is really supposed to initialize, so treat it as being equivalent to anything. */ if ((TREE_CODE (TREE_OPERAND (t1, 0)) == VAR_DECL && DECL_NAME (TREE_OPERAND (t1, 0)) == NULL_TREE && !DECL_RTL_SET_P (TREE_OPERAND (t1, 0))) || (TREE_CODE (TREE_OPERAND (t2, 0)) == VAR_DECL && DECL_NAME (TREE_OPERAND (t2, 0)) == NULL_TREE && !DECL_RTL_SET_P (TREE_OPERAND (t2, 0)))) cmp = 1; else cmp = simple_cst_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); if (cmp <= 0) return cmp; return simple_cst_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)); case WITH_CLEANUP_EXPR: cmp = simple_cst_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); if (cmp <= 0) return cmp; return simple_cst_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t1, 1)); case COMPONENT_REF: if (TREE_OPERAND (t1, 1) == TREE_OPERAND (t2, 1)) return simple_cst_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); return 0; case VAR_DECL: case PARM_DECL: case CONST_DECL: case FUNCTION_DECL: return 0; default: if (POLY_INT_CST_P (t1)) /* A false return means maybe_ne rather than known_ne. */ return known_eq (poly_widest_int::from (poly_int_cst_value (t1), TYPE_SIGN (TREE_TYPE (t1))), poly_widest_int::from (poly_int_cst_value (t2), TYPE_SIGN (TREE_TYPE (t2)))); break; } /* This general rule works for most tree codes. All exceptions should be handled above. If this is a language-specific tree code, we can't trust what might be in the operand, so say we don't know the situation. */ if ((int) code1 >= (int) LAST_AND_UNUSED_TREE_CODE) return -1; switch (TREE_CODE_CLASS (code1)) { case tcc_unary: case tcc_binary: case tcc_comparison: case tcc_expression: case tcc_reference: case tcc_statement: cmp = 1; for (i = 0; i < TREE_CODE_LENGTH (code1); i++) { cmp = simple_cst_equal (TREE_OPERAND (t1, i), TREE_OPERAND (t2, i)); if (cmp <= 0) return cmp; } return cmp; default: return -1; } } /* Compare the value of T, an INTEGER_CST, with U, an unsigned integer value. Return -1, 0, or 1 if the value of T is less than, equal to, or greater than U, respectively. */ int compare_tree_int (const_tree t, unsigned HOST_WIDE_INT u) { if (tree_int_cst_sgn (t) < 0) return -1; else if (!tree_fits_uhwi_p (t)) return 1; else if (TREE_INT_CST_LOW (t) == u) return 0; else if (TREE_INT_CST_LOW (t) < u) return -1; else return 1; } /* Return true if SIZE represents a constant size that is in bounds of what the middle-end and the backend accepts (covering not more than half of the address-space). When PERR is non-null, set *PERR on failure to the description of why SIZE is not valid. */ bool valid_constant_size_p (const_tree size, cst_size_error *perr /* = NULL */) { if (POLY_INT_CST_P (size)) { if (TREE_OVERFLOW (size)) return false; for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i) if (!valid_constant_size_p (POLY_INT_CST_COEFF (size, i))) return false; return true; } cst_size_error error; if (!perr) perr = &error; if (TREE_CODE (size) != INTEGER_CST) { *perr = cst_size_not_constant; return false; } if (TREE_OVERFLOW_P (size)) { *perr = cst_size_overflow; return false; } if (tree_int_cst_sgn (size) < 0) { *perr = cst_size_negative; return false; } if (!tree_fits_uhwi_p (size) || (wi::to_widest (TYPE_MAX_VALUE (sizetype)) < wi::to_widest (size) * 2)) { *perr = cst_size_too_big; return false; } return true; } /* Return the precision of the type, or for a complex or vector type the precision of the type of its elements. */ unsigned int element_precision (const_tree type) { if (!TYPE_P (type)) type = TREE_TYPE (type); enum tree_code code = TREE_CODE (type); if (code == COMPLEX_TYPE || code == VECTOR_TYPE) type = TREE_TYPE (type); return TYPE_PRECISION (type); } /* Return true if CODE represents an associative tree code. Otherwise return false. */ bool associative_tree_code (enum tree_code code) { switch (code) { case BIT_IOR_EXPR: case BIT_AND_EXPR: case BIT_XOR_EXPR: case PLUS_EXPR: case MULT_EXPR: case MIN_EXPR: case MAX_EXPR: return true; default: break; } return false; } /* Return true if CODE represents a commutative tree code. Otherwise return false. */ bool commutative_tree_code (enum tree_code code) { switch (code) { case PLUS_EXPR: case MULT_EXPR: case MULT_HIGHPART_EXPR: case MIN_EXPR: case MAX_EXPR: case BIT_IOR_EXPR: case BIT_XOR_EXPR: case BIT_AND_EXPR: case NE_EXPR: case EQ_EXPR: case UNORDERED_EXPR: case ORDERED_EXPR: case UNEQ_EXPR: case LTGT_EXPR: case TRUTH_AND_EXPR: case TRUTH_XOR_EXPR: case TRUTH_OR_EXPR: case WIDEN_MULT_EXPR: case VEC_WIDEN_MULT_HI_EXPR: case VEC_WIDEN_MULT_LO_EXPR: case VEC_WIDEN_MULT_EVEN_EXPR: case VEC_WIDEN_MULT_ODD_EXPR: return true; default: break; } return false; } /* Return true if CODE represents a ternary tree code for which the first two operands are commutative. Otherwise return false. */ bool commutative_ternary_tree_code (enum tree_code code) { switch (code) { case WIDEN_MULT_PLUS_EXPR: case WIDEN_MULT_MINUS_EXPR: case DOT_PROD_EXPR: return true; default: break; } return false; } /* Returns true if CODE can overflow. */ bool operation_can_overflow (enum tree_code code) { switch (code) { case PLUS_EXPR: case MINUS_EXPR: case MULT_EXPR: case LSHIFT_EXPR: /* Can overflow in various ways. */ return true; case TRUNC_DIV_EXPR: case EXACT_DIV_EXPR: case FLOOR_DIV_EXPR: case CEIL_DIV_EXPR: /* For INT_MIN / -1. */ return true; case NEGATE_EXPR: case ABS_EXPR: /* For -INT_MIN. */ return true; default: /* These operators cannot overflow. */ return false; } } /* Returns true if CODE operating on operands of type TYPE doesn't overflow, or ftrapv doesn't generate trapping insns for CODE. */ bool operation_no_trapping_overflow (tree type, enum tree_code code) { gcc_checking_assert (ANY_INTEGRAL_TYPE_P (type)); /* We don't generate instructions that trap on overflow for complex or vector types. */ if (!INTEGRAL_TYPE_P (type)) return true; if (!TYPE_OVERFLOW_TRAPS (type)) return true; switch (code) { case PLUS_EXPR: case MINUS_EXPR: case MULT_EXPR: case NEGATE_EXPR: case ABS_EXPR: /* These operators can overflow, and -ftrapv generates trapping code for these. */ return false; case TRUNC_DIV_EXPR: case EXACT_DIV_EXPR: case FLOOR_DIV_EXPR: case CEIL_DIV_EXPR: case LSHIFT_EXPR: /* These operators can overflow, but -ftrapv does not generate trapping code for these. */ return true; default: /* These operators cannot overflow. */ return true; } } /* Constructors for pointer, array and function types. (RECORD_TYPE, UNION_TYPE and ENUMERAL_TYPE nodes are constructed by language-dependent code, not here.) */ /* Construct, lay out and return the type of pointers to TO_TYPE with mode MODE. If CAN_ALIAS_ALL is TRUE, indicate this type can reference all of memory. If such a type has already been constructed, reuse it. */ tree build_pointer_type_for_mode (tree to_type, machine_mode mode, bool can_alias_all) { tree t; bool could_alias = can_alias_all; if (to_type == error_mark_node) return error_mark_node; /* If the pointed-to type has the may_alias attribute set, force a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */ if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type))) can_alias_all = true; /* In some cases, languages will have things that aren't a POINTER_TYPE (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_POINTER_TO. In that case, return that type without regard to the rest of our operands. ??? This is a kludge, but consistent with the way this function has always operated and there doesn't seem to be a good way to avoid this at the moment. */ if (TYPE_POINTER_TO (to_type) != 0 && TREE_CODE (TYPE_POINTER_TO (to_type)) != POINTER_TYPE) return TYPE_POINTER_TO (to_type); /* First, if we already have a type for pointers to TO_TYPE and it's the proper mode, use it. */ for (t = TYPE_POINTER_TO (to_type); t; t = TYPE_NEXT_PTR_TO (t)) if (TYPE_MODE (t) == mode && TYPE_REF_CAN_ALIAS_ALL (t) == can_alias_all) return t; t = make_node (POINTER_TYPE); TREE_TYPE (t) = to_type; SET_TYPE_MODE (t, mode); TYPE_REF_CAN_ALIAS_ALL (t) = can_alias_all; TYPE_NEXT_PTR_TO (t) = TYPE_POINTER_TO (to_type); TYPE_POINTER_TO (to_type) = t; /* During LTO we do not set TYPE_CANONICAL of pointers and references. */ if (TYPE_STRUCTURAL_EQUALITY_P (to_type) || in_lto_p) SET_TYPE_STRUCTURAL_EQUALITY (t); else if (TYPE_CANONICAL (to_type) != to_type || could_alias) TYPE_CANONICAL (t) = build_pointer_type_for_mode (TYPE_CANONICAL (to_type), mode, false); /* Lay out the type. This function has many callers that are concerned with expression-construction, and this simplifies them all. */ layout_type (t); return t; } /* By default build pointers in ptr_mode. */ tree build_pointer_type (tree to_type) { addr_space_t as = to_type == error_mark_node? ADDR_SPACE_GENERIC : TYPE_ADDR_SPACE (to_type); machine_mode pointer_mode = targetm.addr_space.pointer_mode (as); return build_pointer_type_for_mode (to_type, pointer_mode, false); } /* Same as build_pointer_type_for_mode, but for REFERENCE_TYPE. */ tree build_reference_type_for_mode (tree to_type, machine_mode mode, bool can_alias_all) { tree t; bool could_alias = can_alias_all; if (to_type == error_mark_node) return error_mark_node; /* If the pointed-to type has the may_alias attribute set, force a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */ if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type))) can_alias_all = true; /* In some cases, languages will have things that aren't a REFERENCE_TYPE (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_REFERENCE_TO. In that case, return that type without regard to the rest of our operands. ??? This is a kludge, but consistent with the way this function has always operated and there doesn't seem to be a good way to avoid this at the moment. */ if (TYPE_REFERENCE_TO (to_type) != 0 && TREE_CODE (TYPE_REFERENCE_TO (to_type)) != REFERENCE_TYPE) return TYPE_REFERENCE_TO (to_type); /* First, if we already have a type for pointers to TO_TYPE and it's the proper mode, use it. */ for (t = TYPE_REFERENCE_TO (to_type); t; t = TYPE_NEXT_REF_TO (t)) if (TYPE_MODE (t) == mode && TYPE_REF_CAN_ALIAS_ALL (t) == can_alias_all) return t; t = make_node (REFERENCE_TYPE); TREE_TYPE (t) = to_type; SET_TYPE_MODE (t, mode); TYPE_REF_CAN_ALIAS_ALL (t) = can_alias_all; TYPE_NEXT_REF_TO (t) = TYPE_REFERENCE_TO (to_type); TYPE_REFERENCE_TO (to_type) = t; /* During LTO we do not set TYPE_CANONICAL of pointers and references. */ if (TYPE_STRUCTURAL_EQUALITY_P (to_type) || in_lto_p) SET_TYPE_STRUCTURAL_EQUALITY (t); else if (TYPE_CANONICAL (to_type) != to_type || could_alias) TYPE_CANONICAL (t) = build_reference_type_for_mode (TYPE_CANONICAL (to_type), mode, false); layout_type (t); return t; } /* Build the node for the type of references-to-TO_TYPE by default in ptr_mode. */ tree build_reference_type (tree to_type) { addr_space_t as = to_type == error_mark_node? ADDR_SPACE_GENERIC : TYPE_ADDR_SPACE (to_type); machine_mode pointer_mode = targetm.addr_space.pointer_mode (as); return build_reference_type_for_mode (to_type, pointer_mode, false); } #define MAX_INT_CACHED_PREC \ (HOST_BITS_PER_WIDE_INT > 64 ? HOST_BITS_PER_WIDE_INT : 64) static GTY(()) tree nonstandard_integer_type_cache[2 * MAX_INT_CACHED_PREC + 2]; /* Builds a signed or unsigned integer type of precision PRECISION. Used for C bitfields whose precision does not match that of built-in target types. */ tree build_nonstandard_integer_type (unsigned HOST_WIDE_INT precision, int unsignedp) { tree itype, ret; if (unsignedp) unsignedp = MAX_INT_CACHED_PREC + 1; if (precision <= MAX_INT_CACHED_PREC) { itype = nonstandard_integer_type_cache[precision + unsignedp]; if (itype) return itype; } itype = make_node (INTEGER_TYPE); TYPE_PRECISION (itype) = precision; if (unsignedp) fixup_unsigned_type (itype); else fixup_signed_type (itype); inchash::hash hstate; inchash::add_expr (TYPE_MAX_VALUE (itype), hstate); ret = type_hash_canon (hstate.end (), itype); if (precision <= MAX_INT_CACHED_PREC) nonstandard_integer_type_cache[precision + unsignedp] = ret; return ret; } #define MAX_BOOL_CACHED_PREC \ (HOST_BITS_PER_WIDE_INT > 64 ? HOST_BITS_PER_WIDE_INT : 64) static GTY(()) tree nonstandard_boolean_type_cache[MAX_BOOL_CACHED_PREC + 1]; /* Builds a boolean type of precision PRECISION. Used for boolean vectors to choose proper vector element size. */ tree build_nonstandard_boolean_type (unsigned HOST_WIDE_INT precision) { tree type; if (precision <= MAX_BOOL_CACHED_PREC) { type = nonstandard_boolean_type_cache[precision]; if (type) return type; } type = make_node (BOOLEAN_TYPE); TYPE_PRECISION (type) = precision; fixup_signed_type (type); if (precision <= MAX_INT_CACHED_PREC) nonstandard_boolean_type_cache[precision] = type; return type; } /* Create a range of some discrete type TYPE (an INTEGER_TYPE, ENUMERAL_TYPE or BOOLEAN_TYPE) with low bound LOWVAL and high bound HIGHVAL. If SHARED is true, reuse such a type that has already been constructed. */ static tree build_range_type_1 (tree type, tree lowval, tree highval, bool shared) { tree itype = make_node (INTEGER_TYPE); TREE_TYPE (itype) = type; TYPE_MIN_VALUE (itype) = fold_convert (type, lowval); TYPE_MAX_VALUE (itype) = highval ? fold_convert (type, highval) : NULL; TYPE_PRECISION (itype) = TYPE_PRECISION (type); SET_TYPE_MODE (itype, TYPE_MODE (type)); TYPE_SIZE (itype) = TYPE_SIZE (type); TYPE_SIZE_UNIT (itype) = TYPE_SIZE_UNIT (type); SET_TYPE_ALIGN (itype, TYPE_ALIGN (type)); TYPE_USER_ALIGN (itype) = TYPE_USER_ALIGN (type); SET_TYPE_WARN_IF_NOT_ALIGN (itype, TYPE_WARN_IF_NOT_ALIGN (type)); if (!shared) return itype; if ((TYPE_MIN_VALUE (itype) && TREE_CODE (TYPE_MIN_VALUE (itype)) != INTEGER_CST) || (TYPE_MAX_VALUE (itype) && TREE_CODE (TYPE_MAX_VALUE (itype)) != INTEGER_CST)) { /* Since we cannot reliably merge this type, we need to compare it using structural equality checks. */ SET_TYPE_STRUCTURAL_EQUALITY (itype); return itype; } hashval_t hash = type_hash_canon_hash (itype); itype = type_hash_canon (hash, itype); return itype; } /* Wrapper around build_range_type_1 with SHARED set to true. */ tree build_range_type (tree type, tree lowval, tree highval) { return build_range_type_1 (type, lowval, highval, true); } /* Wrapper around build_range_type_1 with SHARED set to false. */ tree build_nonshared_range_type (tree type, tree lowval, tree highval) { return build_range_type_1 (type, lowval, highval, false); } /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE. MAXVAL should be the maximum value in the domain (one less than the length of the array). The maximum value that MAXVAL can have is INT_MAX for a HOST_WIDE_INT. We don't enforce this limit, that is up to caller (e.g. language front end). The limit exists because the result is a signed type and we don't handle sizes that use more than one HOST_WIDE_INT. */ tree build_index_type (tree maxval) { return build_range_type (sizetype, size_zero_node, maxval); } /* Return true if the debug information for TYPE, a subtype, should be emitted as a subrange type. If so, set LOWVAL to the low bound and HIGHVAL to the high bound, respectively. Sometimes doing so unnecessarily obfuscates the debug info and doesn't reflect the source code. */ bool subrange_type_for_debug_p (const_tree type, tree *lowval, tree *highval) { tree base_type = TREE_TYPE (type), low, high; /* Subrange types have a base type which is an integral type. */ if (!INTEGRAL_TYPE_P (base_type)) return false; /* Get the real bounds of the subtype. */ if (lang_hooks.types.get_subrange_bounds) lang_hooks.types.get_subrange_bounds (type, &low, &high); else { low = TYPE_MIN_VALUE (type); high = TYPE_MAX_VALUE (type); } /* If the type and its base type have the same representation and the same name, then the type is not a subrange but a copy of the base type. */ if ((TREE_CODE (base_type) == INTEGER_TYPE || TREE_CODE (base_type) == BOOLEAN_TYPE) && int_size_in_bytes (type) == int_size_in_bytes (base_type) && tree_int_cst_equal (low, TYPE_MIN_VALUE (base_type)) && tree_int_cst_equal (high, TYPE_MAX_VALUE (base_type)) && TYPE_IDENTIFIER (type) == TYPE_IDENTIFIER (base_type)) return false; if (lowval) *lowval = low; if (highval) *highval = high; return true; } /* Construct, lay out and return the type of arrays of elements with ELT_TYPE and number of elements specified by the range of values of INDEX_TYPE. If TYPELESS_STORAGE is true, TYPE_TYPELESS_STORAGE flag is set on the type. If SHARED is true, reuse such a type that has already been constructed. If SET_CANONICAL is true, compute TYPE_CANONICAL from the element type. */ static tree build_array_type_1 (tree elt_type, tree index_type, bool typeless_storage, bool shared, bool set_canonical) { tree t; if (TREE_CODE (elt_type) == FUNCTION_TYPE) { error ("arrays of functions are not meaningful"); elt_type = integer_type_node; } t = make_node (ARRAY_TYPE); TREE_TYPE (t) = elt_type; TYPE_DOMAIN (t) = index_type; TYPE_ADDR_SPACE (t) = TYPE_ADDR_SPACE (elt_type); TYPE_TYPELESS_STORAGE (t) = typeless_storage; layout_type (t); if (shared) { hashval_t hash = type_hash_canon_hash (t); t = type_hash_canon (hash, t); } if (TYPE_CANONICAL (t) == t && set_canonical) { if (TYPE_STRUCTURAL_EQUALITY_P (elt_type) || (index_type && TYPE_STRUCTURAL_EQUALITY_P (index_type)) || in_lto_p) SET_TYPE_STRUCTURAL_EQUALITY (t); else if (TYPE_CANONICAL (elt_type) != elt_type || (index_type && TYPE_CANONICAL (index_type) != index_type)) TYPE_CANONICAL (t) = build_array_type_1 (TYPE_CANONICAL (elt_type), index_type ? TYPE_CANONICAL (index_type) : NULL_TREE, typeless_storage, shared, set_canonical); } return t; } /* Wrapper around build_array_type_1 with SHARED set to true. */ tree build_array_type (tree elt_type, tree index_type, bool typeless_storage) { return build_array_type_1 (elt_type, index_type, typeless_storage, true, true); } /* Wrapper around build_array_type_1 with SHARED set to false. */ tree build_nonshared_array_type (tree elt_type, tree index_type) { return build_array_type_1 (elt_type, index_type, false, false, true); } /* Return a representation of ELT_TYPE[NELTS], using indices of type sizetype. */ tree build_array_type_nelts (tree elt_type, poly_uint64 nelts) { return build_array_type (elt_type, build_index_type (size_int (nelts - 1))); } /* Recursively examines the array elements of TYPE, until a non-array element type is found. */ tree strip_array_types (tree type) { while (TREE_CODE (type) == ARRAY_TYPE) type = TREE_TYPE (type); return type; } /* Computes the canonical argument types from the argument type list ARGTYPES. Upon return, *ANY_STRUCTURAL_P will be true iff either it was true on entry to this function, or if any of the ARGTYPES are structural. Upon return, *ANY_NONCANONICAL_P will be true iff either it was true on entry to this function, or if any of the ARGTYPES are non-canonical. Returns a canonical argument list, which may be ARGTYPES when the canonical argument list is unneeded (i.e., *ANY_STRUCTURAL_P is true) or would not differ from ARGTYPES. */ static tree maybe_canonicalize_argtypes (tree argtypes, bool *any_structural_p, bool *any_noncanonical_p) { tree arg; bool any_noncanonical_argtypes_p = false; for (arg = argtypes; arg && !(*any_structural_p); arg = TREE_CHAIN (arg)) { if (!TREE_VALUE (arg) || TREE_VALUE (arg) == error_mark_node) /* Fail gracefully by stating that the type is structural. */ *any_structural_p = true; else if (TYPE_STRUCTURAL_EQUALITY_P (TREE_VALUE (arg))) *any_structural_p = true; else if (TYPE_CANONICAL (TREE_VALUE (arg)) != TREE_VALUE (arg) || TREE_PURPOSE (arg)) /* If the argument has a default argument, we consider it non-canonical even though the type itself is canonical. That way, different variants of function and method types with default arguments will all point to the variant with no defaults as their canonical type. */ any_noncanonical_argtypes_p = true; } if (*any_structural_p) return argtypes; if (any_noncanonical_argtypes_p) { /* Build the canonical list of argument types. */ tree canon_argtypes = NULL_TREE; bool is_void = false; for (arg = argtypes; arg; arg = TREE_CHAIN (arg)) { if (arg == void_list_node) is_void = true; else canon_argtypes = tree_cons (NULL_TREE, TYPE_CANONICAL (TREE_VALUE (arg)), canon_argtypes); } canon_argtypes = nreverse (canon_argtypes); if (is_void) canon_argtypes = chainon (canon_argtypes, void_list_node); /* There is a non-canonical type. */ *any_noncanonical_p = true; return canon_argtypes; } /* The canonical argument types are the same as ARGTYPES. */ return argtypes; } /* Construct, lay out and return the type of functions returning type VALUE_TYPE given arguments of types ARG_TYPES. ARG_TYPES is a chain of TREE_LIST nodes whose TREE_VALUEs are data type nodes for the arguments of the function. If such a type has already been constructed, reuse it. */ tree build_function_type (tree value_type, tree arg_types) { tree t; inchash::hash hstate; bool any_structural_p, any_noncanonical_p; tree canon_argtypes; gcc_assert (arg_types != error_mark_node); if (TREE_CODE (value_type) == FUNCTION_TYPE) { error ("function return type cannot be function"); value_type = integer_type_node; } /* Make a node of the sort we want. */ t = make_node (FUNCTION_TYPE); TREE_TYPE (t) = value_type; TYPE_ARG_TYPES (t) = arg_types; /* If we already have such a type, use the old one. */ hashval_t hash = type_hash_canon_hash (t); t = type_hash_canon (hash, t); /* Set up the canonical type. */ any_structural_p = TYPE_STRUCTURAL_EQUALITY_P (value_type); any_noncanonical_p = TYPE_CANONICAL (value_type) != value_type; canon_argtypes = maybe_canonicalize_argtypes (arg_types, &any_structural_p, &any_noncanonical_p); if (any_structural_p) SET_TYPE_STRUCTURAL_EQUALITY (t); else if (any_noncanonical_p) TYPE_CANONICAL (t) = build_function_type (TYPE_CANONICAL (value_type), canon_argtypes); if (!COMPLETE_TYPE_P (t)) layout_type (t); return t; } /* Build a function type. The RETURN_TYPE is the type returned by the function. If VAARGS is set, no void_type_node is appended to the list. ARGP must be always be terminated be a NULL_TREE. */ static tree build_function_type_list_1 (bool vaargs, tree return_type, va_list argp) { tree t, args, last; t = va_arg (argp, tree); for (args = NULL_TREE; t != NULL_TREE; t = va_arg (argp, tree)) args = tree_cons (NULL_TREE, t, args); if (vaargs) { last = args; if (args != NULL_TREE) args = nreverse (args); gcc_assert (last != void_list_node); } else if (args == NULL_TREE) args = void_list_node; else { last = args; args = nreverse (args); TREE_CHAIN (last) = void_list_node; } args = build_function_type (return_type, args); return args; } /* Build a function type. The RETURN_TYPE is the type returned by the function. If additional arguments are provided, they are additional argument types. The list of argument types must always be terminated by NULL_TREE. */ tree build_function_type_list (tree return_type, ...) { tree args; va_list p; va_start (p, return_type); args = build_function_type_list_1 (false, return_type, p); va_end (p); return args; } /* Build a variable argument function type. The RETURN_TYPE is the type returned by the function. If additional arguments are provided, they are additional argument types. The list of argument types must always be terminated by NULL_TREE. */ tree build_varargs_function_type_list (tree return_type, ...) { tree args; va_list p; va_start (p, return_type); args = build_function_type_list_1 (true, return_type, p); va_end (p); return args; } /* Build a function type. RETURN_TYPE is the type returned by the function; VAARGS indicates whether the function takes varargs. The function takes N named arguments, the types of which are provided in ARG_TYPES. */ static tree build_function_type_array_1 (bool vaargs, tree return_type, int n, tree *arg_types) { int i; tree t = vaargs ? NULL_TREE : void_list_node; for (i = n - 1; i >= 0; i--) t = tree_cons (NULL_TREE, arg_types[i], t); return build_function_type (return_type, t); } /* Build a function type. RETURN_TYPE is the type returned by the function. The function takes N named arguments, the types of which are provided in ARG_TYPES. */ tree build_function_type_array (tree return_type, int n, tree *arg_types) { return build_function_type_array_1 (false, return_type, n, arg_types); } /* Build a variable argument function type. RETURN_TYPE is the type returned by the function. The function takes N named arguments, the types of which are provided in ARG_TYPES. */ tree build_varargs_function_type_array (tree return_type, int n, tree *arg_types) { return build_function_type_array_1 (true, return_type, n, arg_types); } /* Build a METHOD_TYPE for a member of BASETYPE. The RETTYPE (a TYPE) and ARGTYPES (a TREE_LIST) are the return type and arguments types for the method. An implicit additional parameter (of type pointer-to-BASETYPE) is added to the ARGTYPES. */ tree build_method_type_directly (tree basetype, tree rettype, tree argtypes) { tree t; tree ptype; bool any_structural_p, any_noncanonical_p; tree canon_argtypes; /* Make a node of the sort we want. */ t = make_node (METHOD_TYPE); TYPE_METHOD_BASETYPE (t) = TYPE_MAIN_VARIANT (basetype); TREE_TYPE (t) = rettype; ptype = build_pointer_type (basetype); /* The actual arglist for this function includes a "hidden" argument which is "this". Put it into the list of argument types. */ argtypes = tree_cons (NULL_TREE, ptype, argtypes); TYPE_ARG_TYPES (t) = argtypes; /* If we already have such a type, use the old one. */ hashval_t hash = type_hash_canon_hash (t); t = type_hash_canon (hash, t); /* Set up the canonical type. */ any_structural_p = (TYPE_STRUCTURAL_EQUALITY_P (basetype) || TYPE_STRUCTURAL_EQUALITY_P (rettype)); any_noncanonical_p = (TYPE_CANONICAL (basetype) != basetype || TYPE_CANONICAL (rettype) != rettype); canon_argtypes = maybe_canonicalize_argtypes (TREE_CHAIN (argtypes), &any_structural_p, &any_noncanonical_p); if (any_structural_p) SET_TYPE_STRUCTURAL_EQUALITY (t); else if (any_noncanonical_p) TYPE_CANONICAL (t) = build_method_type_directly (TYPE_CANONICAL (basetype), TYPE_CANONICAL (rettype), canon_argtypes); if (!COMPLETE_TYPE_P (t)) layout_type (t); return t; } /* Construct, lay out and return the type of methods belonging to class BASETYPE and whose arguments and values are described by TYPE. If that type exists already, reuse it. TYPE must be a FUNCTION_TYPE node. */ tree build_method_type (tree basetype, tree type) { gcc_assert (TREE_CODE (type) == FUNCTION_TYPE); return build_method_type_directly (basetype, TREE_TYPE (type), TYPE_ARG_TYPES (type)); } /* Construct, lay out and return the type of offsets to a value of type TYPE, within an object of type BASETYPE. If a suitable offset type exists already, reuse it. */ tree build_offset_type (tree basetype, tree type) { tree t; /* Make a node of the sort we want. */ t = make_node (OFFSET_TYPE); TYPE_OFFSET_BASETYPE (t) = TYPE_MAIN_VARIANT (basetype); TREE_TYPE (t) = type; /* If we already have such a type, use the old one. */ hashval_t hash = type_hash_canon_hash (t); t = type_hash_canon (hash, t); if (!COMPLETE_TYPE_P (t)) layout_type (t); if (TYPE_CANONICAL (t) == t) { if (TYPE_STRUCTURAL_EQUALITY_P (basetype) || TYPE_STRUCTURAL_EQUALITY_P (type)) SET_TYPE_STRUCTURAL_EQUALITY (t); else if (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype)) != basetype || TYPE_CANONICAL (type) != type) TYPE_CANONICAL (t) = build_offset_type (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype)), TYPE_CANONICAL (type)); } return t; } /* Create a complex type whose components are COMPONENT_TYPE. If NAMED is true, the type is given a TYPE_NAME. We do not always do so because this creates a DECL node and thus make the DECL_UIDs dependent on the type canonicalization hashtable, which is GC-ed, so the DECL_UIDs would not be stable wrt garbage collection. */ tree build_complex_type (tree component_type, bool named) { gcc_assert (INTEGRAL_TYPE_P (component_type) || SCALAR_FLOAT_TYPE_P (component_type) || FIXED_POINT_TYPE_P (component_type)); /* Make a node of the sort we want. */ tree probe = make_node (COMPLEX_TYPE); TREE_TYPE (probe) = TYPE_MAIN_VARIANT (component_type); /* If we already have such a type, use the old one. */ hashval_t hash = type_hash_canon_hash (probe); tree t = type_hash_canon (hash, probe); if (t == probe) { /* We created a new type. The hash insertion will have laid out the type. We need to check the canonicalization and maybe set the name. */ gcc_checking_assert (COMPLETE_TYPE_P (t) && !TYPE_NAME (t) && TYPE_CANONICAL (t) == t); if (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (t))) SET_TYPE_STRUCTURAL_EQUALITY (t); else if (TYPE_CANONICAL (TREE_TYPE (t)) != TREE_TYPE (t)) TYPE_CANONICAL (t) = build_complex_type (TYPE_CANONICAL (TREE_TYPE (t)), named); /* We need to create a name, since complex is a fundamental type. */ if (named) { const char *name = NULL; if (TREE_TYPE (t) == char_type_node) name = "complex char"; else if (TREE_TYPE (t) == signed_char_type_node) name = "complex signed char"; else if (TREE_TYPE (t) == unsigned_char_type_node) name = "complex unsigned char"; else if (TREE_TYPE (t) == short_integer_type_node) name = "complex short int"; else if (TREE_TYPE (t) == short_unsigned_type_node) name = "complex short unsigned int"; else if (TREE_TYPE (t) == integer_type_node) name = "complex int"; else if (TREE_TYPE (t) == unsigned_type_node) name = "complex unsigned int"; else if (TREE_TYPE (t) == long_integer_type_node) name = "complex long int"; else if (TREE_TYPE (t) == long_unsigned_type_node) name = "complex long unsigned int"; else if (TREE_TYPE (t) == long_long_integer_type_node) name = "complex long long int"; else if (TREE_TYPE (t) == long_long_unsigned_type_node) name = "complex long long unsigned int"; if (name != NULL) TYPE_NAME (t) = build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier (name), t); } } return build_qualified_type (t, TYPE_QUALS (component_type)); } /* If TYPE is a real or complex floating-point type and the target does not directly support arithmetic on TYPE then return the wider type to be used for arithmetic on TYPE. Otherwise, return NULL_TREE. */ tree excess_precision_type (tree type) { /* The target can give two different responses to the question of which excess precision mode it would like depending on whether we are in -fexcess-precision=standard or -fexcess-precision=fast. */ enum excess_precision_type requested_type = (flag_excess_precision == EXCESS_PRECISION_FAST ? EXCESS_PRECISION_TYPE_FAST : EXCESS_PRECISION_TYPE_STANDARD); enum flt_eval_method target_flt_eval_method = targetm.c.excess_precision (requested_type); /* The target should not ask for unpredictable float evaluation (though it might advertise that implicitly the evaluation is unpredictable, but we don't care about that here, it will have been reported elsewhere). If it does ask for unpredictable evaluation, we have nothing to do here. */ gcc_assert (target_flt_eval_method != FLT_EVAL_METHOD_UNPREDICTABLE); /* Nothing to do. The target has asked for all types we know about to be computed with their native precision and range. */ if (target_flt_eval_method == FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16) return NULL_TREE; /* The target will promote this type in a target-dependent way, so excess precision ought to leave it alone. */ if (targetm.promoted_type (type) != NULL_TREE) return NULL_TREE; machine_mode float16_type_mode = (float16_type_node ? TYPE_MODE (float16_type_node) : VOIDmode); machine_mode float_type_mode = TYPE_MODE (float_type_node); machine_mode double_type_mode = TYPE_MODE (double_type_node); switch (TREE_CODE (type)) { case REAL_TYPE: { machine_mode type_mode = TYPE_MODE (type); switch (target_flt_eval_method) { case FLT_EVAL_METHOD_PROMOTE_TO_FLOAT: if (type_mode == float16_type_mode) return float_type_node; break; case FLT_EVAL_METHOD_PROMOTE_TO_DOUBLE: if (type_mode == float16_type_mode || type_mode == float_type_mode) return double_type_node; break; case FLT_EVAL_METHOD_PROMOTE_TO_LONG_DOUBLE: if (type_mode == float16_type_mode || type_mode == float_type_mode || type_mode == double_type_mode) return long_double_type_node; break; default: gcc_unreachable (); } break; } case COMPLEX_TYPE: { if (TREE_CODE (TREE_TYPE (type)) != REAL_TYPE) return NULL_TREE; machine_mode type_mode = TYPE_MODE (TREE_TYPE (type)); switch (target_flt_eval_method) { case FLT_EVAL_METHOD_PROMOTE_TO_FLOAT: if (type_mode == float16_type_mode) return complex_float_type_node; break; case FLT_EVAL_METHOD_PROMOTE_TO_DOUBLE: if (type_mode == float16_type_mode || type_mode == float_type_mode) return complex_double_type_node; break; case FLT_EVAL_METHOD_PROMOTE_TO_LONG_DOUBLE: if (type_mode == float16_type_mode || type_mode == float_type_mode || type_mode == double_type_mode) return complex_long_double_type_node; break; default: gcc_unreachable (); } break; } default: break; } return NULL_TREE; } /* Return OP, stripped of any conversions to wider types as much as is safe. Converting the value back to OP's type makes a value equivalent to OP. If FOR_TYPE is nonzero, we return a value which, if converted to type FOR_TYPE, would be equivalent to converting OP to type FOR_TYPE. OP must have integer, real or enumeral type. Pointers are not allowed! There are some cases where the obvious value we could return would regenerate to OP if converted to OP's type, but would not extend like OP to wider types. If FOR_TYPE indicates such extension is contemplated, we eschew such values. For example, if OP is (unsigned short)(signed char)-1, we avoid returning (signed char)-1 if FOR_TYPE is int, even though extending that to an unsigned short would regenerate OP, since the result of extending (signed char)-1 to (int) is different from (int) OP. */ tree get_unwidened (tree op, tree for_type) { /* Set UNS initially if converting OP to FOR_TYPE is a zero-extension. */ tree type = TREE_TYPE (op); unsigned final_prec = TYPE_PRECISION (for_type != 0 ? for_type : type); int uns = (for_type != 0 && for_type != type && final_prec > TYPE_PRECISION (type) && TYPE_UNSIGNED (type)); tree win = op; while (CONVERT_EXPR_P (op)) { int bitschange; /* TYPE_PRECISION on vector types has different meaning (TYPE_VECTOR_SUBPARTS) and casts from vectors are view conversions, so avoid them here. */ if (TREE_CODE (TREE_TYPE (TREE_OPERAND (op, 0))) == VECTOR_TYPE) break; bitschange = TYPE_PRECISION (TREE_TYPE (op)) - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op, 0))); /* Truncations are many-one so cannot be removed. Unless we are later going to truncate down even farther. */ if (bitschange < 0 && final_prec > TYPE_PRECISION (TREE_TYPE (op))) break; /* See what's inside this conversion. If we decide to strip it, we will set WIN. */ op = TREE_OPERAND (op, 0); /* If we have not stripped any zero-extensions (uns is 0), we can strip any kind of extension. If we have previously stripped a zero-extension, only zero-extensions can safely be stripped. Any extension can be stripped if the bits it would produce are all going to be discarded later by truncating to FOR_TYPE. */ if (bitschange > 0) { if (! uns || final_prec <= TYPE_PRECISION (TREE_TYPE (op))) win = op; /* TYPE_UNSIGNED says whether this is a zero-extension. Let's avoid computing it if it does not affect WIN and if UNS will not be needed again. */ if ((uns || CONVERT_EXPR_P (op)) && TYPE_UNSIGNED (TREE_TYPE (op))) { uns = 1; win = op; } } } /* If we finally reach a constant see if it fits in sth smaller and in that case convert it. */ if (TREE_CODE (win) == INTEGER_CST) { tree wtype = TREE_TYPE (win); unsigned prec = wi::min_precision (wi::to_wide (win), TYPE_SIGN (wtype)); if (for_type) prec = MAX (prec, final_prec); if (prec < TYPE_PRECISION (wtype)) { tree t = lang_hooks.types.type_for_size (prec, TYPE_UNSIGNED (wtype)); if (t && TYPE_PRECISION (t) < TYPE_PRECISION (wtype)) win = fold_convert (t, win); } } return win; } /* Return OP or a simpler expression for a narrower value which can be sign-extended or zero-extended to give back OP. Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended or 0 if the value should be sign-extended. */ tree get_narrower (tree op, int *unsignedp_ptr) { int uns = 0; int first = 1; tree win = op; bool integral_p = INTEGRAL_TYPE_P (TREE_TYPE (op)); if (TREE_CODE (op) == COMPOUND_EXPR) { do op = TREE_OPERAND (op, 1); while (TREE_CODE (op) == COMPOUND_EXPR); tree ret = get_narrower (op, unsignedp_ptr); if (ret == op) return win; auto_vec v; unsigned int i; for (op = win; TREE_CODE (op) == COMPOUND_EXPR; op = TREE_OPERAND (op, 1)) v.safe_push (op); FOR_EACH_VEC_ELT_REVERSE (v, i, op) ret = build2_loc (EXPR_LOCATION (op), COMPOUND_EXPR, TREE_TYPE (ret), TREE_OPERAND (op, 0), ret); return ret; } while (TREE_CODE (op) == NOP_EXPR) { int bitschange = (TYPE_PRECISION (TREE_TYPE (op)) - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op, 0)))); /* Truncations are many-one so cannot be removed. */ if (bitschange < 0) break; /* See what's inside this conversion. If we decide to strip it, we will set WIN. */ if (bitschange > 0) { op = TREE_OPERAND (op, 0); /* An extension: the outermost one can be stripped, but remember whether it is zero or sign extension. */ if (first) uns = TYPE_UNSIGNED (TREE_TYPE (op)); /* Otherwise, if a sign extension has been stripped, only sign extensions can now be stripped; if a zero extension has been stripped, only zero-extensions. */ else if (uns != TYPE_UNSIGNED (TREE_TYPE (op))) break; first = 0; } else /* bitschange == 0 */ { /* A change in nominal type can always be stripped, but we must preserve the unsignedness. */ if (first) uns = TYPE_UNSIGNED (TREE_TYPE (op)); first = 0; op = TREE_OPERAND (op, 0); /* Keep trying to narrow, but don't assign op to win if it would turn an integral type into something else. */ if (INTEGRAL_TYPE_P (TREE_TYPE (op)) != integral_p) continue; } win = op; } if (TREE_CODE (op) == COMPONENT_REF /* Since type_for_size always gives an integer type. */ && TREE_CODE (TREE_TYPE (op)) != REAL_TYPE && TREE_CODE (TREE_TYPE (op)) != FIXED_POINT_TYPE /* Ensure field is laid out already. */ && DECL_SIZE (TREE_OPERAND (op, 1)) != 0 && tree_fits_uhwi_p (DECL_SIZE (TREE_OPERAND (op, 1)))) { unsigned HOST_WIDE_INT innerprec = tree_to_uhwi (DECL_SIZE (TREE_OPERAND (op, 1))); int unsignedp = (DECL_UNSIGNED (TREE_OPERAND (op, 1)) || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op, 1)))); tree type = lang_hooks.types.type_for_size (innerprec, unsignedp); /* We can get this structure field in a narrower type that fits it, but the resulting extension to its nominal type (a fullword type) must satisfy the same conditions as for other extensions. Do this only for fields that are aligned (not bit-fields), because when bit-field insns will be used there is no advantage in doing this. */ if (innerprec < TYPE_PRECISION (TREE_TYPE (op)) && ! DECL_BIT_FIELD (TREE_OPERAND (op, 1)) && (first || uns == DECL_UNSIGNED (TREE_OPERAND (op, 1))) && type != 0) { if (first) uns = DECL_UNSIGNED (TREE_OPERAND (op, 1)); win = fold_convert (type, op); } } *unsignedp_ptr = uns; return win; } /* Return true if integer constant C has a value that is permissible for TYPE, an integral type. */ bool int_fits_type_p (const_tree c, const_tree type) { tree type_low_bound, type_high_bound; bool ok_for_low_bound, ok_for_high_bound; signop sgn_c = TYPE_SIGN (TREE_TYPE (c)); /* Non-standard boolean types can have arbitrary precision but various transformations assume that they can only take values 0 and +/-1. */ if (TREE_CODE (type) == BOOLEAN_TYPE) return wi::fits_to_boolean_p (wi::to_wide (c), type); retry: type_low_bound = TYPE_MIN_VALUE (type); type_high_bound = TYPE_MAX_VALUE (type); /* If at least one bound of the type is a constant integer, we can check ourselves and maybe make a decision. If no such decision is possible, but this type is a subtype, try checking against that. Otherwise, use fits_to_tree_p, which checks against the precision. Compute the status for each possibly constant bound, and return if we see one does not match. Use ok_for_xxx_bound for this purpose, assigning -1 for "unknown if constant fits", 0 for "constant known *not* to fit" and 1 for "constant known to fit". */ /* Check if c >= type_low_bound. */ if (type_low_bound && TREE_CODE (type_low_bound) == INTEGER_CST) { if (tree_int_cst_lt (c, type_low_bound)) return false; ok_for_low_bound = true; } else ok_for_low_bound = false; /* Check if c <= type_high_bound. */ if (type_high_bound && TREE_CODE (type_high_bound) == INTEGER_CST) { if (tree_int_cst_lt (type_high_bound, c)) return false; ok_for_high_bound = true; } else ok_for_high_bound = false; /* If the constant fits both bounds, the result is known. */ if (ok_for_low_bound && ok_for_high_bound) return true; /* Perform some generic filtering which may allow making a decision even if the bounds are not constant. First, negative integers never fit in unsigned types, */ if (TYPE_UNSIGNED (type) && sgn_c == SIGNED && wi::neg_p (wi::to_wide (c))) return false; /* Second, narrower types always fit in wider ones. */ if (TYPE_PRECISION (type) > TYPE_PRECISION (TREE_TYPE (c))) return true; /* Third, unsigned integers with top bit set never fit signed types. */ if (!TYPE_UNSIGNED (type) && sgn_c == UNSIGNED) { int prec = GET_MODE_PRECISION (SCALAR_INT_TYPE_MODE (TREE_TYPE (c))) - 1; if (prec < TYPE_PRECISION (TREE_TYPE (c))) { /* When a tree_cst is converted to a wide-int, the precision is taken from the type. However, if the precision of the mode underneath the type is smaller than that, it is possible that the value will not fit. The test below fails if any bit is set between the sign bit of the underlying mode and the top bit of the type. */ if (wi::zext (wi::to_wide (c), prec - 1) != wi::to_wide (c)) return false; } else if (wi::neg_p (wi::to_wide (c))) return false; } /* If we haven't been able to decide at this point, there nothing more we can check ourselves here. Look at the base type if we have one and it has the same precision. */ if (TREE_CODE (type) == INTEGER_TYPE && TREE_TYPE (type) != 0 && TYPE_PRECISION (type) == TYPE_PRECISION (TREE_TYPE (type))) { type = TREE_TYPE (type); goto retry; } /* Or to fits_to_tree_p, if nothing else. */ return wi::fits_to_tree_p (wi::to_wide (c), type); } /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant bounds or is a POINTER_TYPE, the maximum and/or minimum values that can be represented (assuming two's-complement arithmetic) within the bit precision of the type are returned instead. */ void get_type_static_bounds (const_tree type, mpz_t min, mpz_t max) { if (!POINTER_TYPE_P (type) && TYPE_MIN_VALUE (type) && TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST) wi::to_mpz (wi::to_wide (TYPE_MIN_VALUE (type)), min, TYPE_SIGN (type)); else { if (TYPE_UNSIGNED (type)) mpz_set_ui (min, 0); else { wide_int mn = wi::min_value (TYPE_PRECISION (type), SIGNED); wi::to_mpz (mn, min, SIGNED); } } if (!POINTER_TYPE_P (type) && TYPE_MAX_VALUE (type) && TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST) wi::to_mpz (wi::to_wide (TYPE_MAX_VALUE (type)), max, TYPE_SIGN (type)); else { wide_int mn = wi::max_value (TYPE_PRECISION (type), TYPE_SIGN (type)); wi::to_mpz (mn, max, TYPE_SIGN (type)); } } /* Return true if VAR is an automatic variable. */ bool auto_var_p (const_tree var) { return ((((VAR_P (var) && ! DECL_EXTERNAL (var)) || TREE_CODE (var) == PARM_DECL) && ! TREE_STATIC (var)) || TREE_CODE (var) == RESULT_DECL); } /* Return true if VAR is an automatic variable defined in function FN. */ bool auto_var_in_fn_p (const_tree var, const_tree fn) { return (DECL_P (var) && DECL_CONTEXT (var) == fn && (auto_var_p (var) || TREE_CODE (var) == LABEL_DECL)); } /* Subprogram of following function. Called by walk_tree. Return *TP if it is an automatic variable or parameter of the function passed in as DATA. */ static tree find_var_from_fn (tree *tp, int *walk_subtrees, void *data) { tree fn = (tree) data; if (TYPE_P (*tp)) *walk_subtrees = 0; else if (DECL_P (*tp) && auto_var_in_fn_p (*tp, fn)) return *tp; return NULL_TREE; } /* Returns true if T is, contains, or refers to a type with variable size. For METHOD_TYPEs and FUNCTION_TYPEs we exclude the arguments, but not the return type. If FN is nonzero, only return true if a modifier of the type or position of FN is a variable or parameter inside FN. This concept is more general than that of C99 'variably modified types': in C99, a struct type is never variably modified because a VLA may not appear as a structure member. However, in GNU C code like: struct S { int i[f()]; }; is valid, and other languages may define similar constructs. */ bool variably_modified_type_p (tree type, tree fn) { tree t; /* Test if T is either variable (if FN is zero) or an expression containing a variable in FN. If TYPE isn't gimplified, return true also if gimplify_one_sizepos would gimplify the expression into a local variable. */ #define RETURN_TRUE_IF_VAR(T) \ do { tree _t = (T); \ if (_t != NULL_TREE \ && _t != error_mark_node \ && !CONSTANT_CLASS_P (_t) \ && TREE_CODE (_t) != PLACEHOLDER_EXPR \ && (!fn \ || (!TYPE_SIZES_GIMPLIFIED (type) \ && (TREE_CODE (_t) != VAR_DECL \ && !CONTAINS_PLACEHOLDER_P (_t))) \ || walk_tree (&_t, find_var_from_fn, fn, NULL))) \ return true; } while (0) if (type == error_mark_node) return false; /* If TYPE itself has variable size, it is variably modified. */ RETURN_TRUE_IF_VAR (TYPE_SIZE (type)); RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type)); switch (TREE_CODE (type)) { case POINTER_TYPE: case REFERENCE_TYPE: case VECTOR_TYPE: /* Ada can have pointer types refering to themselves indirectly. */ if (TREE_VISITED (type)) return false; TREE_VISITED (type) = true; if (variably_modified_type_p (TREE_TYPE (type), fn)) { TREE_VISITED (type) = false; return true; } TREE_VISITED (type) = false; break; case FUNCTION_TYPE: case METHOD_TYPE: /* If TYPE is a function type, it is variably modified if the return type is variably modified. */ if (variably_modified_type_p (TREE_TYPE (type), fn)) return true; break; case INTEGER_TYPE: case REAL_TYPE: case FIXED_POINT_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE: /* Scalar types are variably modified if their end points aren't constant. */ RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type)); RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type)); break; case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: /* We can't see if any of the fields are variably-modified by the definition we normally use, since that would produce infinite recursion via pointers. */ /* This is variably modified if some field's type is. */ for (t = TYPE_FIELDS (type); t; t = DECL_CHAIN (t)) if (TREE_CODE (t) == FIELD_DECL) { RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t)); RETURN_TRUE_IF_VAR (DECL_SIZE (t)); RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t)); /* If the type is a qualified union, then the DECL_QUALIFIER of fields can also be an expression containing a variable. */ if (TREE_CODE (type) == QUAL_UNION_TYPE) RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t)); /* If the field is a qualified union, then it's only a container for what's inside so we look into it. That's necessary in LTO mode because the sizes of the field tested above have been set to PLACEHOLDER_EXPRs by free_lang_data. */ if (TREE_CODE (TREE_TYPE (t)) == QUAL_UNION_TYPE && variably_modified_type_p (TREE_TYPE (t), fn)) return true; } break; case ARRAY_TYPE: /* Do not call ourselves to avoid infinite recursion. This is variably modified if the element type is. */ RETURN_TRUE_IF_VAR (TYPE_SIZE (TREE_TYPE (type))); RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (TREE_TYPE (type))); break; default: break; } /* The current language may have other cases to check, but in general, all other types are not variably modified. */ return lang_hooks.tree_inlining.var_mod_type_p (type, fn); #undef RETURN_TRUE_IF_VAR } /* Given a DECL or TYPE, return the scope in which it was declared, or NULL_TREE if there is no containing scope. */ tree get_containing_scope (const_tree t) { return (TYPE_P (t) ? TYPE_CONTEXT (t) : DECL_CONTEXT (t)); } /* Returns the ultimate TRANSLATION_UNIT_DECL context of DECL or NULL. */ const_tree get_ultimate_context (const_tree decl) { while (decl && TREE_CODE (decl) != TRANSLATION_UNIT_DECL) { if (TREE_CODE (decl) == BLOCK) decl = BLOCK_SUPERCONTEXT (decl); else decl = get_containing_scope (decl); } return decl; } /* Return the innermost context enclosing DECL that is a FUNCTION_DECL, or zero if none. */ tree decl_function_context (const_tree decl) { tree context; if (TREE_CODE (decl) == ERROR_MARK) return 0; /* C++ virtual functions use DECL_CONTEXT for the class of the vtable where we look up the function at runtime. Such functions always take a first argument of type 'pointer to real context'. C++ should really be fixed to use DECL_CONTEXT for the real context, and use something else for the "virtual context". */ else if (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl)) context = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))))); else context = DECL_CONTEXT (decl); while (context && TREE_CODE (context) != FUNCTION_DECL) { if (TREE_CODE (context) == BLOCK) context = BLOCK_SUPERCONTEXT (context); else context = get_containing_scope (context); } return context; } /* Return the innermost context enclosing DECL that is a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, or zero if none. TYPE_DECLs and FUNCTION_DECLs are transparent to this function. */ tree decl_type_context (const_tree decl) { tree context = DECL_CONTEXT (decl); while (context) switch (TREE_CODE (context)) { case NAMESPACE_DECL: case TRANSLATION_UNIT_DECL: return NULL_TREE; case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: return context; case TYPE_DECL: case FUNCTION_DECL: context = DECL_CONTEXT (context); break; case BLOCK: context = BLOCK_SUPERCONTEXT (context); break; default: gcc_unreachable (); } return NULL_TREE; } /* CALL is a CALL_EXPR. Return the declaration for the function called, or NULL_TREE if the called function cannot be determined. */ tree get_callee_fndecl (const_tree call) { tree addr; if (call == error_mark_node) return error_mark_node; /* It's invalid to call this function with anything but a CALL_EXPR. */ gcc_assert (TREE_CODE (call) == CALL_EXPR); /* The first operand to the CALL is the address of the function called. */ addr = CALL_EXPR_FN (call); /* If there is no function, return early. */ if (addr == NULL_TREE) return NULL_TREE; STRIP_NOPS (addr); /* If this is a readonly function pointer, extract its initial value. */ if (DECL_P (addr) && TREE_CODE (addr) != FUNCTION_DECL && TREE_READONLY (addr) && ! TREE_THIS_VOLATILE (addr) && DECL_INITIAL (addr)) addr = DECL_INITIAL (addr); /* If the address is just `&f' for some function `f', then we know that `f' is being called. */ if (TREE_CODE (addr) == ADDR_EXPR && TREE_CODE (TREE_OPERAND (addr, 0)) == FUNCTION_DECL) return TREE_OPERAND (addr, 0); /* We couldn't figure out what was being called. */ return NULL_TREE; } /* If CALL_EXPR CALL calls a normal built-in function or an internal function, return the associated function code, otherwise return CFN_LAST. */ combined_fn get_call_combined_fn (const_tree call) { /* It's invalid to call this function with anything but a CALL_EXPR. */ gcc_assert (TREE_CODE (call) == CALL_EXPR); if (!CALL_EXPR_FN (call)) return as_combined_fn (CALL_EXPR_IFN (call)); tree fndecl = get_callee_fndecl (call); if (fndecl && fndecl_built_in_p (fndecl, BUILT_IN_NORMAL)) return as_combined_fn (DECL_FUNCTION_CODE (fndecl)); return CFN_LAST; } /* Comparator of indices based on tree_node_counts. */ static int tree_nodes_cmp (const void *p1, const void *p2) { const unsigned *n1 = (const unsigned *)p1; const unsigned *n2 = (const unsigned *)p2; return tree_node_counts[*n1] - tree_node_counts[*n2]; } /* Comparator of indices based on tree_code_counts. */ static int tree_codes_cmp (const void *p1, const void *p2) { const unsigned *n1 = (const unsigned *)p1; const unsigned *n2 = (const unsigned *)p2; return tree_code_counts[*n1] - tree_code_counts[*n2]; } #define TREE_MEM_USAGE_SPACES 40 /* Print debugging information about tree nodes generated during the compile, and any language-specific information. */ void dump_tree_statistics (void) { if (GATHER_STATISTICS) { uint64_t total_nodes, total_bytes; fprintf (stderr, "\nKind Nodes Bytes\n"); mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES); total_nodes = total_bytes = 0; { auto_vec indices (all_kinds); for (unsigned i = 0; i < all_kinds; i++) indices.quick_push (i); indices.qsort (tree_nodes_cmp); for (unsigned i = 0; i < (int) all_kinds; i++) { unsigned j = indices[i]; fprintf (stderr, "%-20s %6" PRIu64 "%c %9" PRIu64 "%c\n", tree_node_kind_names[j], SIZE_AMOUNT (tree_node_counts[j]), SIZE_AMOUNT (tree_node_sizes[j])); total_nodes += tree_node_counts[j]; total_bytes += tree_node_sizes[j]; } mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES); fprintf (stderr, "%-20s %6" PRIu64 "%c %9" PRIu64 "%c\n", "Total", SIZE_AMOUNT (total_nodes), SIZE_AMOUNT (total_bytes)); mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES); } { fprintf (stderr, "Code Nodes\n"); mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES); auto_vec indices (MAX_TREE_CODES); for (unsigned i = 0; i < MAX_TREE_CODES; i++) indices.quick_push (i); indices.qsort (tree_codes_cmp); for (unsigned i = 0; i < MAX_TREE_CODES; i++) { unsigned j = indices[i]; fprintf (stderr, "%-32s %6" PRIu64 "%c\n", get_tree_code_name ((enum tree_code) j), SIZE_AMOUNT (tree_code_counts[j])); } mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES); fprintf (stderr, "\n"); ssanames_print_statistics (); fprintf (stderr, "\n"); phinodes_print_statistics (); fprintf (stderr, "\n"); } } else fprintf (stderr, "(No per-node statistics)\n"); print_type_hash_statistics (); print_debug_expr_statistics (); print_value_expr_statistics (); lang_hooks.print_statistics (); } #define FILE_FUNCTION_FORMAT "_GLOBAL__%s_%s" /* Generate a crc32 of the low BYTES bytes of VALUE. */ unsigned crc32_unsigned_n (unsigned chksum, unsigned value, unsigned bytes) { /* This relies on the raw feedback's top 4 bits being zero. */ #define FEEDBACK(X) ((X) * 0x04c11db7) #define SYNDROME(X) (FEEDBACK ((X) & 1) ^ FEEDBACK ((X) & 2) \ ^ FEEDBACK ((X) & 4) ^ FEEDBACK ((X) & 8)) static const unsigned syndromes[16] = { SYNDROME(0x0), SYNDROME(0x1), SYNDROME(0x2), SYNDROME(0x3), SYNDROME(0x4), SYNDROME(0x5), SYNDROME(0x6), SYNDROME(0x7), SYNDROME(0x8), SYNDROME(0x9), SYNDROME(0xa), SYNDROME(0xb), SYNDROME(0xc), SYNDROME(0xd), SYNDROME(0xe), SYNDROME(0xf), }; #undef FEEDBACK #undef SYNDROME value <<= (32 - bytes * 8); for (unsigned ix = bytes * 2; ix--; value <<= 4) { unsigned feedback = syndromes[((value ^ chksum) >> 28) & 0xf]; chksum = (chksum << 4) ^ feedback; } return chksum; } /* Generate a crc32 of a string. */ unsigned crc32_string (unsigned chksum, const char *string) { do chksum = crc32_byte (chksum, *string); while (*string++); return chksum; } /* P is a string that will be used in a symbol. Mask out any characters that are not valid in that context. */ void clean_symbol_name (char *p) { for (; *p; p++) if (! (ISALNUM (*p) #ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */ || *p == '$' #endif #ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */ || *p == '.' #endif )) *p = '_'; } static GTY(()) unsigned anon_cnt = 0; /* Saved for PCH. */ /* Create a unique anonymous identifier. The identifier is still a valid assembly label. */ tree make_anon_name () { const char *fmt = #if !defined (NO_DOT_IN_LABEL) "." #elif !defined (NO_DOLLAR_IN_LABEL) "$" #else "_" #endif "_anon_%d"; char buf[24]; int len = snprintf (buf, sizeof (buf), fmt, anon_cnt++); gcc_checking_assert (len < int (sizeof (buf))); tree id = get_identifier_with_length (buf, len); IDENTIFIER_ANON_P (id) = true; return id; } /* Generate a name for a special-purpose function. The generated name may need to be unique across the whole link. Changes to this function may also require corresponding changes to xstrdup_mask_random. TYPE is some string to identify the purpose of this function to the linker or collect2; it must start with an uppercase letter, one of: I - for constructors D - for destructors N - for C++ anonymous namespaces F - for DWARF unwind frame information. */ tree get_file_function_name (const char *type) { char *buf; const char *p; char *q; /* If we already have a name we know to be unique, just use that. */ if (first_global_object_name) p = q = ASTRDUP (first_global_object_name); /* If the target is handling the constructors/destructors, they will be local to this file and the name is only necessary for debugging purposes. We also assign sub_I and sub_D sufixes to constructors called from the global static constructors. These are always local. */ else if (((type[0] == 'I' || type[0] == 'D') && targetm.have_ctors_dtors) || (strncmp (type, "sub_", 4) == 0 && (type[4] == 'I' || type[4] == 'D'))) { const char *file = main_input_filename; if (! file) file = LOCATION_FILE (input_location); /* Just use the file's basename, because the full pathname might be quite long. */ p = q = ASTRDUP (lbasename (file)); } else { /* Otherwise, the name must be unique across the entire link. We don't have anything that we know to be unique to this translation unit, so use what we do have and throw in some randomness. */ unsigned len; const char *name = weak_global_object_name; const char *file = main_input_filename; if (! name) name = ""; if (! file) file = LOCATION_FILE (input_location); len = strlen (file); q = (char *) alloca (9 + 19 + len + 1); memcpy (q, file, len + 1); snprintf (q + len, 9 + 19 + 1, "_%08X_" HOST_WIDE_INT_PRINT_HEX, crc32_string (0, name), get_random_seed (false)); p = q; } clean_symbol_name (q); buf = (char *) alloca (sizeof (FILE_FUNCTION_FORMAT) + strlen (p) + strlen (type)); /* Set up the name of the file-level functions we may need. Use a global object (which is already required to be unique over the program) rather than the file name (which imposes extra constraints). */ sprintf (buf, FILE_FUNCTION_FORMAT, type, p); return get_identifier (buf); } #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007) /* Complain that the tree code of NODE does not match the expected 0 terminated list of trailing codes. The trailing code list can be empty, for a more vague error message. FILE, LINE, and FUNCTION are of the caller. */ void tree_check_failed (const_tree node, const char *file, int line, const char *function, ...) { va_list args; const char *buffer; unsigned length = 0; enum tree_code code; va_start (args, function); while ((code = (enum tree_code) va_arg (args, int))) length += 4 + strlen (get_tree_code_name (code)); va_end (args); if (length) { char *tmp; va_start (args, function); length += strlen ("expected "); buffer = tmp = (char *) alloca (length); length = 0; while ((code = (enum tree_code) va_arg (args, int))) { const char *prefix = length ? " or " : "expected "; strcpy (tmp + length, prefix); length += strlen (prefix); strcpy (tmp + length, get_tree_code_name (code)); length += strlen (get_tree_code_name (code)); } va_end (args); } else buffer = "unexpected node"; internal_error ("tree check: %s, have %s in %s, at %s:%d", buffer, get_tree_code_name (TREE_CODE (node)), function, trim_filename (file), line); } /* Complain that the tree code of NODE does match the expected 0 terminated list of trailing codes. FILE, LINE, and FUNCTION are of the caller. */ void tree_not_check_failed (const_tree node, const char *file, int line, const char *function, ...) { va_list args; char *buffer; unsigned length = 0; enum tree_code code; va_start (args, function); while ((code = (enum tree_code) va_arg (args, int))) length += 4 + strlen (get_tree_code_name (code)); va_end (args); va_start (args, function); buffer = (char *) alloca (length); length = 0; while ((code = (enum tree_code) va_arg (args, int))) { if (length) { strcpy (buffer + length, " or "); length += 4; } strcpy (buffer + length, get_tree_code_name (code)); length += strlen (get_tree_code_name (code)); } va_end (args); internal_error ("tree check: expected none of %s, have %s in %s, at %s:%d", buffer, get_tree_code_name (TREE_CODE (node)), function, trim_filename (file), line); } /* Similar to tree_check_failed, except that we check for a class of tree code, given in CL. */ void tree_class_check_failed (const_tree node, const enum tree_code_class cl, const char *file, int line, const char *function) { internal_error ("tree check: expected class %qs, have %qs (%s) in %s, at %s:%d", TREE_CODE_CLASS_STRING (cl), TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node))), get_tree_code_name (TREE_CODE (node)), function, trim_filename (file), line); } /* Similar to tree_check_failed, except that instead of specifying a dozen codes, use the knowledge that they're all sequential. */ void tree_range_check_failed (const_tree node, const char *file, int line, const char *function, enum tree_code c1, enum tree_code c2) { char *buffer; unsigned length = 0; unsigned int c; for (c = c1; c <= c2; ++c) length += 4 + strlen (get_tree_code_name ((enum tree_code) c)); length += strlen ("expected "); buffer = (char *) alloca (length); length = 0; for (c = c1; c <= c2; ++c) { const char *prefix = length ? " or " : "expected "; strcpy (buffer + length, prefix); length += strlen (prefix); strcpy (buffer + length, get_tree_code_name ((enum tree_code) c)); length += strlen (get_tree_code_name ((enum tree_code) c)); } internal_error ("tree check: %s, have %s in %s, at %s:%d", buffer, get_tree_code_name (TREE_CODE (node)), function, trim_filename (file), line); } /* Similar to tree_check_failed, except that we check that a tree does not have the specified code, given in CL. */ void tree_not_class_check_failed (const_tree node, const enum tree_code_class cl, const char *file, int line, const char *function) { internal_error ("tree check: did not expect class %qs, have %qs (%s) in %s, at %s:%d", TREE_CODE_CLASS_STRING (cl), TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node))), get_tree_code_name (TREE_CODE (node)), function, trim_filename (file), line); } /* Similar to tree_check_failed but applied to OMP_CLAUSE codes. */ void omp_clause_check_failed (const_tree node, const char *file, int line, const char *function, enum omp_clause_code code) { internal_error ("tree check: expected %, have %qs " "in %s, at %s:%d", omp_clause_code_name[code], get_tree_code_name (TREE_CODE (node)), function, trim_filename (file), line); } /* Similar to tree_range_check_failed but applied to OMP_CLAUSE codes. */ void omp_clause_range_check_failed (const_tree node, const char *file, int line, const char *function, enum omp_clause_code c1, enum omp_clause_code c2) { char *buffer; unsigned length = 0; unsigned int c; for (c = c1; c <= c2; ++c) length += 4 + strlen (omp_clause_code_name[c]); length += strlen ("expected "); buffer = (char *) alloca (length); length = 0; for (c = c1; c <= c2; ++c) { const char *prefix = length ? " or " : "expected "; strcpy (buffer + length, prefix); length += strlen (prefix); strcpy (buffer + length, omp_clause_code_name[c]); length += strlen (omp_clause_code_name[c]); } internal_error ("tree check: %s, have %s in %s, at %s:%d", buffer, omp_clause_code_name[TREE_CODE (node)], function, trim_filename (file), line); } #undef DEFTREESTRUCT #define DEFTREESTRUCT(VAL, NAME) NAME, static const char *ts_enum_names[] = { #include "treestruct.def" }; #undef DEFTREESTRUCT #define TS_ENUM_NAME(EN) (ts_enum_names[(EN)]) /* Similar to tree_class_check_failed, except that we check for whether CODE contains the tree structure identified by EN. */ void tree_contains_struct_check_failed (const_tree node, const enum tree_node_structure_enum en, const char *file, int line, const char *function) { internal_error ("tree check: expected tree that contains %qs structure, have %qs in %s, at %s:%d", TS_ENUM_NAME (en), get_tree_code_name (TREE_CODE (node)), function, trim_filename (file), line); } /* Similar to above, except that the check is for the bounds of a TREE_VEC's (dynamically sized) vector. */ void tree_int_cst_elt_check_failed (int idx, int len, const char *file, int line, const char *function) { internal_error ("tree check: accessed elt %d of % with %d elts in %s, " "at %s:%d", idx + 1, len, function, trim_filename (file), line); } /* Similar to above, except that the check is for the bounds of a TREE_VEC's (dynamically sized) vector. */ void tree_vec_elt_check_failed (int idx, int len, const char *file, int line, const char *function) { internal_error ("tree check: accessed elt %d of % with %d elts in %s, at %s:%d", idx + 1, len, function, trim_filename (file), line); } /* Similar to above, except that the check is for the bounds of the operand vector of an expression node EXP. */ void tree_operand_check_failed (int idx, const_tree exp, const char *file, int line, const char *function) { enum tree_code code = TREE_CODE (exp); internal_error ("tree check: accessed operand %d of %s with %d operands in %s, at %s:%d", idx + 1, get_tree_code_name (code), TREE_OPERAND_LENGTH (exp), function, trim_filename (file), line); } /* Similar to above, except that the check is for the number of operands of an OMP_CLAUSE node. */ void omp_clause_operand_check_failed (int idx, const_tree t, const char *file, int line, const char *function) { internal_error ("tree check: accessed operand %d of % with %d operands " "in %s, at %s:%d", idx + 1, omp_clause_code_name[OMP_CLAUSE_CODE (t)], omp_clause_num_ops [OMP_CLAUSE_CODE (t)], function, trim_filename (file), line); } #endif /* ENABLE_TREE_CHECKING */ /* Create a new vector type node holding NUNITS units of type INNERTYPE, and mapped to the machine mode MODE. Initialize its fields and build the information necessary for debugging output. */ static tree make_vector_type (tree innertype, poly_int64 nunits, machine_mode mode) { tree t; tree mv_innertype = TYPE_MAIN_VARIANT (innertype); t = make_node (VECTOR_TYPE); TREE_TYPE (t) = mv_innertype; SET_TYPE_VECTOR_SUBPARTS (t, nunits); SET_TYPE_MODE (t, mode); if (TYPE_STRUCTURAL_EQUALITY_P (mv_innertype) || in_lto_p) SET_TYPE_STRUCTURAL_EQUALITY (t); else if ((TYPE_CANONICAL (mv_innertype) != innertype || mode != VOIDmode) && !VECTOR_BOOLEAN_TYPE_P (t)) TYPE_CANONICAL (t) = make_vector_type (TYPE_CANONICAL (mv_innertype), nunits, VOIDmode); layout_type (t); hashval_t hash = type_hash_canon_hash (t); t = type_hash_canon (hash, t); /* We have built a main variant, based on the main variant of the inner type. Use it to build the variant we return. */ if ((TYPE_ATTRIBUTES (innertype) || TYPE_QUALS (innertype)) && TREE_TYPE (t) != innertype) return build_type_attribute_qual_variant (t, TYPE_ATTRIBUTES (innertype), TYPE_QUALS (innertype)); return t; } static tree make_or_reuse_type (unsigned size, int unsignedp) { int i; if (size == INT_TYPE_SIZE) return unsignedp ? unsigned_type_node : integer_type_node; if (size == CHAR_TYPE_SIZE) return unsignedp ? unsigned_char_type_node : signed_char_type_node; if (size == SHORT_TYPE_SIZE) return unsignedp ? short_unsigned_type_node : short_integer_type_node; if (size == LONG_TYPE_SIZE) return unsignedp ? long_unsigned_type_node : long_integer_type_node; if (size == LONG_LONG_TYPE_SIZE) return (unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node); for (i = 0; i < NUM_INT_N_ENTS; i ++) if (size == int_n_data[i].bitsize && int_n_enabled_p[i]) return (unsignedp ? int_n_trees[i].unsigned_type : int_n_trees[i].signed_type); if (unsignedp) return make_unsigned_type (size); else return make_signed_type (size); } /* Create or reuse a fract type by SIZE, UNSIGNEDP, and SATP. */ static tree make_or_reuse_fract_type (unsigned size, int unsignedp, int satp) { if (satp) { if (size == SHORT_FRACT_TYPE_SIZE) return unsignedp ? sat_unsigned_short_fract_type_node : sat_short_fract_type_node; if (size == FRACT_TYPE_SIZE) return unsignedp ? sat_unsigned_fract_type_node : sat_fract_type_node; if (size == LONG_FRACT_TYPE_SIZE) return unsignedp ? sat_unsigned_long_fract_type_node : sat_long_fract_type_node; if (size == LONG_LONG_FRACT_TYPE_SIZE) return unsignedp ? sat_unsigned_long_long_fract_type_node : sat_long_long_fract_type_node; } else { if (size == SHORT_FRACT_TYPE_SIZE) return unsignedp ? unsigned_short_fract_type_node : short_fract_type_node; if (size == FRACT_TYPE_SIZE) return unsignedp ? unsigned_fract_type_node : fract_type_node; if (size == LONG_FRACT_TYPE_SIZE) return unsignedp ? unsigned_long_fract_type_node : long_fract_type_node; if (size == LONG_LONG_FRACT_TYPE_SIZE) return unsignedp ? unsigned_long_long_fract_type_node : long_long_fract_type_node; } return make_fract_type (size, unsignedp, satp); } /* Create or reuse an accum type by SIZE, UNSIGNEDP, and SATP. */ static tree make_or_reuse_accum_type (unsigned size, int unsignedp, int satp) { if (satp) { if (size == SHORT_ACCUM_TYPE_SIZE) return unsignedp ? sat_unsigned_short_accum_type_node : sat_short_accum_type_node; if (size == ACCUM_TYPE_SIZE) return unsignedp ? sat_unsigned_accum_type_node : sat_accum_type_node; if (size == LONG_ACCUM_TYPE_SIZE) return unsignedp ? sat_unsigned_long_accum_type_node : sat_long_accum_type_node; if (size == LONG_LONG_ACCUM_TYPE_SIZE) return unsignedp ? sat_unsigned_long_long_accum_type_node : sat_long_long_accum_type_node; } else { if (size == SHORT_ACCUM_TYPE_SIZE) return unsignedp ? unsigned_short_accum_type_node : short_accum_type_node; if (size == ACCUM_TYPE_SIZE) return unsignedp ? unsigned_accum_type_node : accum_type_node; if (size == LONG_ACCUM_TYPE_SIZE) return unsignedp ? unsigned_long_accum_type_node : long_accum_type_node; if (size == LONG_LONG_ACCUM_TYPE_SIZE) return unsignedp ? unsigned_long_long_accum_type_node : long_long_accum_type_node; } return make_accum_type (size, unsignedp, satp); } /* Create an atomic variant node for TYPE. This routine is called during initialization of data types to create the 5 basic atomic types. The generic build_variant_type function requires these to already be set up in order to function properly, so cannot be called from there. If ALIGN is non-zero, then ensure alignment is overridden to this value. */ static tree build_atomic_base (tree type, unsigned int align) { tree t; /* Make sure its not already registered. */ if ((t = get_qualified_type (type, TYPE_QUAL_ATOMIC))) return t; t = build_variant_type_copy (type); set_type_quals (t, TYPE_QUAL_ATOMIC); if (align) SET_TYPE_ALIGN (t, align); return t; } /* Information about the _FloatN and _FloatNx types. This must be in the same order as the corresponding TI_* enum values. */ const floatn_type_info floatn_nx_types[NUM_FLOATN_NX_TYPES] = { { 16, false }, { 32, false }, { 64, false }, { 128, false }, { 32, true }, { 64, true }, { 128, true }, }; /* Create nodes for all integer types (and error_mark_node) using the sizes of C datatypes. SIGNED_CHAR specifies whether char is signed. */ void build_common_tree_nodes (bool signed_char) { int i; error_mark_node = make_node (ERROR_MARK); TREE_TYPE (error_mark_node) = error_mark_node; initialize_sizetypes (); /* Define both `signed char' and `unsigned char'. */ signed_char_type_node = make_signed_type (CHAR_TYPE_SIZE); TYPE_STRING_FLAG (signed_char_type_node) = 1; unsigned_char_type_node = make_unsigned_type (CHAR_TYPE_SIZE); TYPE_STRING_FLAG (unsigned_char_type_node) = 1; /* Define `char', which is like either `signed char' or `unsigned char' but not the same as either. */ char_type_node = (signed_char ? make_signed_type (CHAR_TYPE_SIZE) : make_unsigned_type (CHAR_TYPE_SIZE)); TYPE_STRING_FLAG (char_type_node) = 1; short_integer_type_node = make_signed_type (SHORT_TYPE_SIZE); short_unsigned_type_node = make_unsigned_type (SHORT_TYPE_SIZE); integer_type_node = make_signed_type (INT_TYPE_SIZE); unsigned_type_node = make_unsigned_type (INT_TYPE_SIZE); long_integer_type_node = make_signed_type (LONG_TYPE_SIZE); long_unsigned_type_node = make_unsigned_type (LONG_TYPE_SIZE); long_long_integer_type_node = make_signed_type (LONG_LONG_TYPE_SIZE); long_long_unsigned_type_node = make_unsigned_type (LONG_LONG_TYPE_SIZE); for (i = 0; i < NUM_INT_N_ENTS; i ++) { int_n_trees[i].signed_type = make_signed_type (int_n_data[i].bitsize); int_n_trees[i].unsigned_type = make_unsigned_type (int_n_data[i].bitsize); if (int_n_enabled_p[i]) { integer_types[itk_intN_0 + i * 2] = int_n_trees[i].signed_type; integer_types[itk_unsigned_intN_0 + i * 2] = int_n_trees[i].unsigned_type; } } /* Define a boolean type. This type only represents boolean values but may be larger than char depending on the value of BOOL_TYPE_SIZE. */ boolean_type_node = make_unsigned_type (BOOL_TYPE_SIZE); TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE); TYPE_PRECISION (boolean_type_node) = 1; TYPE_MAX_VALUE (boolean_type_node) = build_int_cst (boolean_type_node, 1); /* Define what type to use for size_t. */ if (strcmp (SIZE_TYPE, "unsigned int") == 0) size_type_node = unsigned_type_node; else if (strcmp (SIZE_TYPE, "long unsigned int") == 0) size_type_node = long_unsigned_type_node; else if (strcmp (SIZE_TYPE, "long long unsigned int") == 0) size_type_node = long_long_unsigned_type_node; else if (strcmp (SIZE_TYPE, "short unsigned int") == 0) size_type_node = short_unsigned_type_node; else { int i; size_type_node = NULL_TREE; for (i = 0; i < NUM_INT_N_ENTS; i++) if (int_n_enabled_p[i]) { char name[50], altname[50]; sprintf (name, "__int%d unsigned", int_n_data[i].bitsize); sprintf (altname, "__int%d__ unsigned", int_n_data[i].bitsize); if (strcmp (name, SIZE_TYPE) == 0 || strcmp (altname, SIZE_TYPE) == 0) { size_type_node = int_n_trees[i].unsigned_type; } } if (size_type_node == NULL_TREE) gcc_unreachable (); } /* Define what type to use for ptrdiff_t. */ if (strcmp (PTRDIFF_TYPE, "int") == 0) ptrdiff_type_node = integer_type_node; else if (strcmp (PTRDIFF_TYPE, "long int") == 0) ptrdiff_type_node = long_integer_type_node; else if (strcmp (PTRDIFF_TYPE, "long long int") == 0) ptrdiff_type_node = long_long_integer_type_node; else if (strcmp (PTRDIFF_TYPE, "short int") == 0) ptrdiff_type_node = short_integer_type_node; else { ptrdiff_type_node = NULL_TREE; for (int i = 0; i < NUM_INT_N_ENTS; i++) if (int_n_enabled_p[i]) { char name[50], altname[50]; sprintf (name, "__int%d", int_n_data[i].bitsize); sprintf (altname, "__int%d__", int_n_data[i].bitsize); if (strcmp (name, PTRDIFF_TYPE) == 0 || strcmp (altname, PTRDIFF_TYPE) == 0) ptrdiff_type_node = int_n_trees[i].signed_type; } if (ptrdiff_type_node == NULL_TREE) gcc_unreachable (); } /* Fill in the rest of the sized types. Reuse existing type nodes when possible. */ intQI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (QImode), 0); intHI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (HImode), 0); intSI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (SImode), 0); intDI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (DImode), 0); intTI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (TImode), 0); unsigned_intQI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (QImode), 1); unsigned_intHI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (HImode), 1); unsigned_intSI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (SImode), 1); unsigned_intDI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (DImode), 1); unsigned_intTI_type_node = make_or_reuse_type (GET_MODE_BITSIZE (TImode), 1); /* Don't call build_qualified type for atomics. That routine does special processing for atomics, and until they are initialized it's better not to make that call. Check to see if there is a target override for atomic types. */ atomicQI_type_node = build_atomic_base (unsigned_intQI_type_node, targetm.atomic_align_for_mode (QImode)); atomicHI_type_node = build_atomic_base (unsigned_intHI_type_node, targetm.atomic_align_for_mode (HImode)); atomicSI_type_node = build_atomic_base (unsigned_intSI_type_node, targetm.atomic_align_for_mode (SImode)); atomicDI_type_node = build_atomic_base (unsigned_intDI_type_node, targetm.atomic_align_for_mode (DImode)); atomicTI_type_node = build_atomic_base (unsigned_intTI_type_node, targetm.atomic_align_for_mode (TImode)); access_public_node = get_identifier ("public"); access_protected_node = get_identifier ("protected"); access_private_node = get_identifier ("private"); /* Define these next since types below may used them. */ integer_zero_node = build_int_cst (integer_type_node, 0); integer_one_node = build_int_cst (integer_type_node, 1); integer_three_node = build_int_cst (integer_type_node, 3); integer_minus_one_node = build_int_cst (integer_type_node, -1); size_zero_node = size_int (0); size_one_node = size_int (1); bitsize_zero_node = bitsize_int (0); bitsize_one_node = bitsize_int (1); bitsize_unit_node = bitsize_int (BITS_PER_UNIT); boolean_false_node = TYPE_MIN_VALUE (boolean_type_node); boolean_true_node = TYPE_MAX_VALUE (boolean_type_node); void_type_node = make_node (VOID_TYPE); layout_type (void_type_node); /* We are not going to have real types in C with less than byte alignment, so we might as well not have any types that claim to have it. */ SET_TYPE_ALIGN (void_type_node, BITS_PER_UNIT); TYPE_USER_ALIGN (void_type_node) = 0; void_node = make_node (VOID_CST); TREE_TYPE (void_node) = void_type_node; null_pointer_node = build_int_cst (build_pointer_type (void_type_node), 0); layout_type (TREE_TYPE (null_pointer_node)); ptr_type_node = build_pointer_type (void_type_node); const_ptr_type_node = build_pointer_type (build_type_variant (void_type_node, 1, 0)); for (unsigned i = 0; i < sizeof (builtin_structptr_types) / sizeof (builtin_structptr_type); ++i) builtin_structptr_types[i].node = builtin_structptr_types[i].base; pointer_sized_int_node = build_nonstandard_integer_type (POINTER_SIZE, 1); float_type_node = make_node (REAL_TYPE); TYPE_PRECISION (float_type_node) = FLOAT_TYPE_SIZE; layout_type (float_type_node); double_type_node = make_node (REAL_TYPE); TYPE_PRECISION (double_type_node) = DOUBLE_TYPE_SIZE; layout_type (double_type_node); long_double_type_node = make_node (REAL_TYPE); TYPE_PRECISION (long_double_type_node) = LONG_DOUBLE_TYPE_SIZE; layout_type (long_double_type_node); for (i = 0; i < NUM_FLOATN_NX_TYPES; i++) { int n = floatn_nx_types[i].n; bool extended = floatn_nx_types[i].extended; scalar_float_mode mode; if (!targetm.floatn_mode (n, extended).exists (&mode)) continue; int precision = GET_MODE_PRECISION (mode); /* Work around the rs6000 KFmode having precision 113 not 128. */ const struct real_format *fmt = REAL_MODE_FORMAT (mode); gcc_assert (fmt->b == 2 && fmt->emin + fmt->emax == 3); int min_precision = fmt->p + ceil_log2 (fmt->emax - fmt->emin); if (!extended) gcc_assert (min_precision == n); if (precision < min_precision) precision = min_precision; FLOATN_NX_TYPE_NODE (i) = make_node (REAL_TYPE); TYPE_PRECISION (FLOATN_NX_TYPE_NODE (i)) = precision; layout_type (FLOATN_NX_TYPE_NODE (i)); SET_TYPE_MODE (FLOATN_NX_TYPE_NODE (i), mode); } float_ptr_type_node = build_pointer_type (float_type_node); double_ptr_type_node = build_pointer_type (double_type_node); long_double_ptr_type_node = build_pointer_type (long_double_type_node); integer_ptr_type_node = build_pointer_type (integer_type_node); /* Fixed size integer types. */ uint16_type_node = make_or_reuse_type (16, 1); uint32_type_node = make_or_reuse_type (32, 1); uint64_type_node = make_or_reuse_type (64, 1); if (targetm.scalar_mode_supported_p (TImode)) uint128_type_node = make_or_reuse_type (128, 1); /* Decimal float types. */ if (targetm.decimal_float_supported_p ()) { dfloat32_type_node = make_node (REAL_TYPE); TYPE_PRECISION (dfloat32_type_node) = DECIMAL32_TYPE_SIZE; SET_TYPE_MODE (dfloat32_type_node, SDmode); layout_type (dfloat32_type_node); dfloat64_type_node = make_node (REAL_TYPE); TYPE_PRECISION (dfloat64_type_node) = DECIMAL64_TYPE_SIZE; SET_TYPE_MODE (dfloat64_type_node, DDmode); layout_type (dfloat64_type_node); dfloat128_type_node = make_node (REAL_TYPE); TYPE_PRECISION (dfloat128_type_node) = DECIMAL128_TYPE_SIZE; SET_TYPE_MODE (dfloat128_type_node, TDmode); layout_type (dfloat128_type_node); } complex_integer_type_node = build_complex_type (integer_type_node, true); complex_float_type_node = build_complex_type (float_type_node, true); complex_double_type_node = build_complex_type (double_type_node, true); complex_long_double_type_node = build_complex_type (long_double_type_node, true); for (i = 0; i < NUM_FLOATN_NX_TYPES; i++) { if (FLOATN_NX_TYPE_NODE (i) != NULL_TREE) COMPLEX_FLOATN_NX_TYPE_NODE (i) = build_complex_type (FLOATN_NX_TYPE_NODE (i)); } /* Make fixed-point nodes based on sat/non-sat and signed/unsigned. */ #define MAKE_FIXED_TYPE_NODE(KIND,SIZE) \ sat_ ## KIND ## _type_node = \ make_sat_signed_ ## KIND ## _type (SIZE); \ sat_unsigned_ ## KIND ## _type_node = \ make_sat_unsigned_ ## KIND ## _type (SIZE); \ KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \ unsigned_ ## KIND ## _type_node = \ make_unsigned_ ## KIND ## _type (SIZE); #define MAKE_FIXED_TYPE_NODE_WIDTH(KIND,WIDTH,SIZE) \ sat_ ## WIDTH ## KIND ## _type_node = \ make_sat_signed_ ## KIND ## _type (SIZE); \ sat_unsigned_ ## WIDTH ## KIND ## _type_node = \ make_sat_unsigned_ ## KIND ## _type (SIZE); \ WIDTH ## KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \ unsigned_ ## WIDTH ## KIND ## _type_node = \ make_unsigned_ ## KIND ## _type (SIZE); /* Make fixed-point type nodes based on four different widths. */ #define MAKE_FIXED_TYPE_NODE_FAMILY(N1,N2) \ MAKE_FIXED_TYPE_NODE_WIDTH (N1, short_, SHORT_ ## N2 ## _TYPE_SIZE) \ MAKE_FIXED_TYPE_NODE (N1, N2 ## _TYPE_SIZE) \ MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_, LONG_ ## N2 ## _TYPE_SIZE) \ MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_long_, LONG_LONG_ ## N2 ## _TYPE_SIZE) /* Make fixed-point mode nodes based on sat/non-sat and signed/unsigned. */ #define MAKE_FIXED_MODE_NODE(KIND,NAME,MODE) \ NAME ## _type_node = \ make_or_reuse_signed_ ## KIND ## _type (GET_MODE_BITSIZE (MODE ## mode)); \ u ## NAME ## _type_node = \ make_or_reuse_unsigned_ ## KIND ## _type \ (GET_MODE_BITSIZE (U ## MODE ## mode)); \ sat_ ## NAME ## _type_node = \ make_or_reuse_sat_signed_ ## KIND ## _type \ (GET_MODE_BITSIZE (MODE ## mode)); \ sat_u ## NAME ## _type_node = \ make_or_reuse_sat_unsigned_ ## KIND ## _type \ (GET_MODE_BITSIZE (U ## MODE ## mode)); /* Fixed-point type and mode nodes. */ MAKE_FIXED_TYPE_NODE_FAMILY (fract, FRACT) MAKE_FIXED_TYPE_NODE_FAMILY (accum, ACCUM) MAKE_FIXED_MODE_NODE (fract, qq, QQ) MAKE_FIXED_MODE_NODE (fract, hq, HQ) MAKE_FIXED_MODE_NODE (fract, sq, SQ) MAKE_FIXED_MODE_NODE (fract, dq, DQ) MAKE_FIXED_MODE_NODE (fract, tq, TQ) MAKE_FIXED_MODE_NODE (accum, ha, HA) MAKE_FIXED_MODE_NODE (accum, sa, SA) MAKE_FIXED_MODE_NODE (accum, da, DA) MAKE_FIXED_MODE_NODE (accum, ta, TA) { tree t = targetm.build_builtin_va_list (); /* Many back-ends define record types without setting TYPE_NAME. If we copied the record type here, we'd keep the original record type without a name. This breaks name mangling. So, don't copy record types and let c_common_nodes_and_builtins() declare the type to be __builtin_va_list. */ if (TREE_CODE (t) != RECORD_TYPE) t = build_variant_type_copy (t); va_list_type_node = t; } /* SCEV analyzer global shared trees. */ chrec_dont_know = make_node (SCEV_NOT_KNOWN); TREE_TYPE (chrec_dont_know) = void_type_node; chrec_known = make_node (SCEV_KNOWN); TREE_TYPE (chrec_known) = void_type_node; } /* Modify DECL for given flags. TM_PURE attribute is set only on types, so the function will modify DECL's type when ECF_TM_PURE is used. */ void set_call_expr_flags (tree decl, int flags) { if (flags & ECF_NOTHROW) TREE_NOTHROW (decl) = 1; if (flags & ECF_CONST) TREE_READONLY (decl) = 1; if (flags & ECF_PURE) DECL_PURE_P (decl) = 1; if (flags & ECF_LOOPING_CONST_OR_PURE) DECL_LOOPING_CONST_OR_PURE_P (decl) = 1; if (flags & ECF_NOVOPS) DECL_IS_NOVOPS (decl) = 1; if (flags & ECF_NORETURN) TREE_THIS_VOLATILE (decl) = 1; if (flags & ECF_MALLOC) DECL_IS_MALLOC (decl) = 1; if (flags & ECF_RETURNS_TWICE) DECL_IS_RETURNS_TWICE (decl) = 1; if (flags & ECF_LEAF) DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("leaf"), NULL, DECL_ATTRIBUTES (decl)); if (flags & ECF_COLD) DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("cold"), NULL, DECL_ATTRIBUTES (decl)); if (flags & ECF_RET1) DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("fn spec"), build_tree_list (NULL_TREE, build_string (2, "1 ")), DECL_ATTRIBUTES (decl)); if ((flags & ECF_TM_PURE) && flag_tm) apply_tm_attr (decl, get_identifier ("transaction_pure")); /* Looping const or pure is implied by noreturn. There is currently no way to declare looping const or looping pure alone. */ gcc_assert (!(flags & ECF_LOOPING_CONST_OR_PURE) || ((flags & ECF_NORETURN) && (flags & (ECF_CONST | ECF_PURE)))); } /* A subroutine of build_common_builtin_nodes. Define a builtin function. */ static void local_define_builtin (const char *name, tree type, enum built_in_function code, const char *library_name, int ecf_flags) { tree decl; decl = add_builtin_function (name, type, code, BUILT_IN_NORMAL, library_name, NULL_TREE); set_call_expr_flags (decl, ecf_flags); set_builtin_decl (code, decl, true); } /* Call this function after instantiating all builtins that the language front end cares about. This will build the rest of the builtins and internal functions that are relied upon by the tree optimizers and the middle-end. */ void build_common_builtin_nodes (void) { tree tmp, ftype; int ecf_flags; if (!builtin_decl_explicit_p (BUILT_IN_UNREACHABLE) || !builtin_decl_explicit_p (BUILT_IN_ABORT)) { ftype = build_function_type (void_type_node, void_list_node); if (!builtin_decl_explicit_p (BUILT_IN_UNREACHABLE)) local_define_builtin ("__builtin_unreachable", ftype, BUILT_IN_UNREACHABLE, "__builtin_unreachable", ECF_NOTHROW | ECF_LEAF | ECF_NORETURN | ECF_CONST | ECF_COLD); if (!builtin_decl_explicit_p (BUILT_IN_ABORT)) local_define_builtin ("__builtin_abort", ftype, BUILT_IN_ABORT, "abort", ECF_LEAF | ECF_NORETURN | ECF_CONST | ECF_COLD); } if (!builtin_decl_explicit_p (BUILT_IN_MEMCPY) || !builtin_decl_explicit_p (BUILT_IN_MEMMOVE)) { ftype = build_function_type_list (ptr_type_node, ptr_type_node, const_ptr_type_node, size_type_node, NULL_TREE); if (!builtin_decl_explicit_p (BUILT_IN_MEMCPY)) local_define_builtin ("__builtin_memcpy", ftype, BUILT_IN_MEMCPY, "memcpy", ECF_NOTHROW | ECF_LEAF); if (!builtin_decl_explicit_p (BUILT_IN_MEMMOVE)) local_define_builtin ("__builtin_memmove", ftype, BUILT_IN_MEMMOVE, "memmove", ECF_NOTHROW | ECF_LEAF); } if (!builtin_decl_explicit_p (BUILT_IN_MEMCMP)) { ftype = build_function_type_list (integer_type_node, const_ptr_type_node, const_ptr_type_node, size_type_node, NULL_TREE); local_define_builtin ("__builtin_memcmp", ftype, BUILT_IN_MEMCMP, "memcmp", ECF_PURE | ECF_NOTHROW | ECF_LEAF); } if (!builtin_decl_explicit_p (BUILT_IN_MEMSET)) { ftype = build_function_type_list (ptr_type_node, ptr_type_node, integer_type_node, size_type_node, NULL_TREE); local_define_builtin ("__builtin_memset", ftype, BUILT_IN_MEMSET, "memset", ECF_NOTHROW | ECF_LEAF); } /* If we're checking the stack, `alloca' can throw. */ const int alloca_flags = ECF_MALLOC | ECF_LEAF | (flag_stack_check ? 0 : ECF_NOTHROW); if (!builtin_decl_explicit_p (BUILT_IN_ALLOCA)) { ftype = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE); local_define_builtin ("__builtin_alloca", ftype, BUILT_IN_ALLOCA, "alloca", alloca_flags); } ftype = build_function_type_list (ptr_type_node, size_type_node, size_type_node, NULL_TREE); local_define_builtin ("__builtin_alloca_with_align", ftype, BUILT_IN_ALLOCA_WITH_ALIGN, "__builtin_alloca_with_align", alloca_flags); ftype = build_function_type_list (ptr_type_node, size_type_node, size_type_node, size_type_node, NULL_TREE); local_define_builtin ("__builtin_alloca_with_align_and_max", ftype, BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX, "__builtin_alloca_with_align_and_max", alloca_flags); ftype = build_function_type_list (void_type_node, ptr_type_node, ptr_type_node, ptr_type_node, NULL_TREE); local_define_builtin ("__builtin_init_trampoline", ftype, BUILT_IN_INIT_TRAMPOLINE, "__builtin_init_trampoline", ECF_NOTHROW | ECF_LEAF); local_define_builtin ("__builtin_init_heap_trampoline", ftype, BUILT_IN_INIT_HEAP_TRAMPOLINE, "__builtin_init_heap_trampoline", ECF_NOTHROW | ECF_LEAF); local_define_builtin ("__builtin_init_descriptor", ftype, BUILT_IN_INIT_DESCRIPTOR, "__builtin_init_descriptor", ECF_NOTHROW | ECF_LEAF); ftype = build_function_type_list (ptr_type_node, ptr_type_node, NULL_TREE); local_define_builtin ("__builtin_adjust_trampoline", ftype, BUILT_IN_ADJUST_TRAMPOLINE, "__builtin_adjust_trampoline", ECF_CONST | ECF_NOTHROW); local_define_builtin ("__builtin_adjust_descriptor", ftype, BUILT_IN_ADJUST_DESCRIPTOR, "__builtin_adjust_descriptor", ECF_CONST | ECF_NOTHROW); ftype = build_function_type_list (void_type_node, ptr_type_node, ptr_type_node, NULL_TREE); if (!builtin_decl_explicit_p (BUILT_IN_CLEAR_CACHE)) local_define_builtin ("__builtin___clear_cache", ftype, BUILT_IN_CLEAR_CACHE, "__clear_cache", ECF_NOTHROW); local_define_builtin ("__builtin_nonlocal_goto", ftype, BUILT_IN_NONLOCAL_GOTO, "__builtin_nonlocal_goto", ECF_NORETURN | ECF_NOTHROW); ftype = build_function_type_list (void_type_node, ptr_type_node, ptr_type_node, NULL_TREE); local_define_builtin ("__builtin_setjmp_setup", ftype, BUILT_IN_SETJMP_SETUP, "__builtin_setjmp_setup", ECF_NOTHROW); ftype = build_function_type_list (void_type_node, ptr_type_node, NULL_TREE); local_define_builtin ("__builtin_setjmp_receiver", ftype, BUILT_IN_SETJMP_RECEIVER, "__builtin_setjmp_receiver", ECF_NOTHROW | ECF_LEAF); ftype = build_function_type_list (ptr_type_node, NULL_TREE); local_define_builtin ("__builtin_stack_save", ftype, BUILT_IN_STACK_SAVE, "__builtin_stack_save", ECF_NOTHROW | ECF_LEAF); ftype = build_function_type_list (void_type_node, ptr_type_node, NULL_TREE); local_define_builtin ("__builtin_stack_restore", ftype, BUILT_IN_STACK_RESTORE, "__builtin_stack_restore", ECF_NOTHROW | ECF_LEAF); ftype = build_function_type_list (integer_type_node, const_ptr_type_node, const_ptr_type_node, size_type_node, NULL_TREE); local_define_builtin ("__builtin_memcmp_eq", ftype, BUILT_IN_MEMCMP_EQ, "__builtin_memcmp_eq", ECF_PURE | ECF_NOTHROW | ECF_LEAF); local_define_builtin ("__builtin_strncmp_eq", ftype, BUILT_IN_STRNCMP_EQ, "__builtin_strncmp_eq", ECF_PURE | ECF_NOTHROW | ECF_LEAF); local_define_builtin ("__builtin_strcmp_eq", ftype, BUILT_IN_STRCMP_EQ, "__builtin_strcmp_eq", ECF_PURE | ECF_NOTHROW | ECF_LEAF); /* If there's a possibility that we might use the ARM EABI, build the alternate __cxa_end_cleanup node used to resume from C++. */ if (targetm.arm_eabi_unwinder) { ftype = build_function_type_list (void_type_node, NULL_TREE); local_define_builtin ("__builtin_cxa_end_cleanup", ftype, BUILT_IN_CXA_END_CLEANUP, "__cxa_end_cleanup", ECF_NORETURN | ECF_LEAF); } ftype = build_function_type_list (void_type_node, ptr_type_node, NULL_TREE); local_define_builtin ("__builtin_unwind_resume", ftype, BUILT_IN_UNWIND_RESUME, ((targetm_common.except_unwind_info (&global_options) == UI_SJLJ) ? "_Unwind_SjLj_Resume" : "_Unwind_Resume"), ECF_NORETURN); if (builtin_decl_explicit (BUILT_IN_RETURN_ADDRESS) == NULL_TREE) { ftype = build_function_type_list (ptr_type_node, integer_type_node, NULL_TREE); local_define_builtin ("__builtin_return_address", ftype, BUILT_IN_RETURN_ADDRESS, "__builtin_return_address", ECF_NOTHROW); } if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_ENTER) || !builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_EXIT)) { ftype = build_function_type_list (void_type_node, ptr_type_node, ptr_type_node, NULL_TREE); if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_ENTER)) local_define_builtin ("__cyg_profile_func_enter", ftype, BUILT_IN_PROFILE_FUNC_ENTER, "__cyg_profile_func_enter", 0); if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_EXIT)) local_define_builtin ("__cyg_profile_func_exit", ftype, BUILT_IN_PROFILE_FUNC_EXIT, "__cyg_profile_func_exit", 0); } /* The exception object and filter values from the runtime. The argument must be zero before exception lowering, i.e. from the front end. After exception lowering, it will be the region number for the exception landing pad. These functions are PURE instead of CONST to prevent them from being hoisted past the exception edge that will initialize its value in the landing pad. */ ftype = build_function_type_list (ptr_type_node, integer_type_node, NULL_TREE); ecf_flags = ECF_PURE | ECF_NOTHROW | ECF_LEAF; /* Only use TM_PURE if we have TM language support. */ if (builtin_decl_explicit_p (BUILT_IN_TM_LOAD_1)) ecf_flags |= ECF_TM_PURE; local_define_builtin ("__builtin_eh_pointer", ftype, BUILT_IN_EH_POINTER, "__builtin_eh_pointer", ecf_flags); tmp = lang_hooks.types.type_for_mode (targetm.eh_return_filter_mode (), 0); ftype = build_function_type_list (tmp, integer_type_node, NULL_TREE); local_define_builtin ("__builtin_eh_filter", ftype, BUILT_IN_EH_FILTER, "__builtin_eh_filter", ECF_PURE | ECF_NOTHROW | ECF_LEAF); ftype = build_function_type_list (void_type_node, integer_type_node, integer_type_node, NULL_TREE); local_define_builtin ("__builtin_eh_copy_values", ftype, BUILT_IN_EH_COPY_VALUES, "__builtin_eh_copy_values", ECF_NOTHROW); /* Complex multiplication and division. These are handled as builtins rather than optabs because emit_library_call_value doesn't support complex. Further, we can do slightly better with folding these beasties if the real and complex parts of the arguments are separate. */ { int mode; for (mode = MIN_MODE_COMPLEX_FLOAT; mode <= MAX_MODE_COMPLEX_FLOAT; ++mode) { char mode_name_buf[4], *q; const char *p; enum built_in_function mcode, dcode; tree type, inner_type; const char *prefix = "__"; if (targetm.libfunc_gnu_prefix) prefix = "__gnu_"; type = lang_hooks.types.type_for_mode ((machine_mode) mode, 0); if (type == NULL) continue; inner_type = TREE_TYPE (type); ftype = build_function_type_list (type, inner_type, inner_type, inner_type, inner_type, NULL_TREE); mcode = ((enum built_in_function) (BUILT_IN_COMPLEX_MUL_MIN + mode - MIN_MODE_COMPLEX_FLOAT)); dcode = ((enum built_in_function) (BUILT_IN_COMPLEX_DIV_MIN + mode - MIN_MODE_COMPLEX_FLOAT)); for (p = GET_MODE_NAME (mode), q = mode_name_buf; *p; p++, q++) *q = TOLOWER (*p); *q = '\0'; /* For -ftrapping-math these should throw from a former -fnon-call-exception stmt. */ built_in_names[mcode] = concat (prefix, "mul", mode_name_buf, "3", NULL); local_define_builtin (built_in_names[mcode], ftype, mcode, built_in_names[mcode], ECF_CONST | ECF_LEAF); built_in_names[dcode] = concat (prefix, "div", mode_name_buf, "3", NULL); local_define_builtin (built_in_names[dcode], ftype, dcode, built_in_names[dcode], ECF_CONST | ECF_LEAF); } } init_internal_fns (); } /* HACK. GROSS. This is absolutely disgusting. I wish there was a better way. If we requested a pointer to a vector, build up the pointers that we stripped off while looking for the inner type. Similarly for return values from functions. The argument TYPE is the top of the chain, and BOTTOM is the new type which we will point to. */ tree reconstruct_complex_type (tree type, tree bottom) { tree inner, outer; if (TREE_CODE (type) == POINTER_TYPE) { inner = reconstruct_complex_type (TREE_TYPE (type), bottom); outer = build_pointer_type_for_mode (inner, TYPE_MODE (type), TYPE_REF_CAN_ALIAS_ALL (type)); } else if (TREE_CODE (type) == REFERENCE_TYPE) { inner = reconstruct_complex_type (TREE_TYPE (type), bottom); outer = build_reference_type_for_mode (inner, TYPE_MODE (type), TYPE_REF_CAN_ALIAS_ALL (type)); } else if (TREE_CODE (type) == ARRAY_TYPE) { inner = reconstruct_complex_type (TREE_TYPE (type), bottom); outer = build_array_type (inner, TYPE_DOMAIN (type)); } else if (TREE_CODE (type) == FUNCTION_TYPE) { inner = reconstruct_complex_type (TREE_TYPE (type), bottom); outer = build_function_type (inner, TYPE_ARG_TYPES (type)); } else if (TREE_CODE (type) == METHOD_TYPE) { inner = reconstruct_complex_type (TREE_TYPE (type), bottom); /* The build_method_type_directly() routine prepends 'this' to argument list, so we must compensate by getting rid of it. */ outer = build_method_type_directly (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type))), inner, TREE_CHAIN (TYPE_ARG_TYPES (type))); } else if (TREE_CODE (type) == OFFSET_TYPE) { inner = reconstruct_complex_type (TREE_TYPE (type), bottom); outer = build_offset_type (TYPE_OFFSET_BASETYPE (type), inner); } else return bottom; return build_type_attribute_qual_variant (outer, TYPE_ATTRIBUTES (type), TYPE_QUALS (type)); } /* Returns a vector tree node given a mode (integer, vector, or BLKmode) and the inner type. */ tree build_vector_type_for_mode (tree innertype, machine_mode mode) { poly_int64 nunits; unsigned int bitsize; switch (GET_MODE_CLASS (mode)) { case MODE_VECTOR_BOOL: case MODE_VECTOR_INT: case MODE_VECTOR_FLOAT: case MODE_VECTOR_FRACT: case MODE_VECTOR_UFRACT: case MODE_VECTOR_ACCUM: case MODE_VECTOR_UACCUM: nunits = GET_MODE_NUNITS (mode); break; case MODE_INT: /* Check that there are no leftover bits. */ bitsize = GET_MODE_BITSIZE (as_a (mode)); gcc_assert (bitsize % TREE_INT_CST_LOW (TYPE_SIZE (innertype)) == 0); nunits = bitsize / TREE_INT_CST_LOW (TYPE_SIZE (innertype)); break; default: gcc_unreachable (); } return make_vector_type (innertype, nunits, mode); } /* Similarly, but takes the inner type and number of units, which must be a power of two. */ tree build_vector_type (tree innertype, poly_int64 nunits) { return make_vector_type (innertype, nunits, VOIDmode); } /* Build a truth vector with NUNITS units, giving it mode MASK_MODE. */ tree build_truth_vector_type_for_mode (poly_uint64 nunits, machine_mode mask_mode) { gcc_assert (mask_mode != BLKmode); unsigned HOST_WIDE_INT esize; if (VECTOR_MODE_P (mask_mode)) { poly_uint64 vsize = GET_MODE_BITSIZE (mask_mode); esize = vector_element_size (vsize, nunits); } else esize = 1; tree bool_type = build_nonstandard_boolean_type (esize); return make_vector_type (bool_type, nunits, mask_mode); } /* Build a vector type that holds one boolean result for each element of vector type VECTYPE. The public interface for this operation is truth_type_for. */ static tree build_truth_vector_type_for (tree vectype) { machine_mode vector_mode = TYPE_MODE (vectype); poly_uint64 nunits = TYPE_VECTOR_SUBPARTS (vectype); machine_mode mask_mode; if (VECTOR_MODE_P (vector_mode) && targetm.vectorize.get_mask_mode (vector_mode).exists (&mask_mode)) return build_truth_vector_type_for_mode (nunits, mask_mode); poly_uint64 vsize = tree_to_poly_uint64 (TYPE_SIZE (vectype)); unsigned HOST_WIDE_INT esize = vector_element_size (vsize, nunits); tree bool_type = build_nonstandard_boolean_type (esize); return make_vector_type (bool_type, nunits, VOIDmode); } /* Like build_vector_type, but builds a variant type with TYPE_VECTOR_OPAQUE set. */ tree build_opaque_vector_type (tree innertype, poly_int64 nunits) { tree t = make_vector_type (innertype, nunits, VOIDmode); tree cand; /* We always build the non-opaque variant before the opaque one, so if it already exists, it is TYPE_NEXT_VARIANT of this one. */ cand = TYPE_NEXT_VARIANT (t); if (cand && TYPE_VECTOR_OPAQUE (cand) && check_qualified_type (cand, t, TYPE_QUALS (t))) return cand; /* Othewise build a variant type and make sure to queue it after the non-opaque type. */ cand = build_distinct_type_copy (t); TYPE_VECTOR_OPAQUE (cand) = true; TYPE_CANONICAL (cand) = TYPE_CANONICAL (t); TYPE_NEXT_VARIANT (cand) = TYPE_NEXT_VARIANT (t); TYPE_NEXT_VARIANT (t) = cand; TYPE_MAIN_VARIANT (cand) = TYPE_MAIN_VARIANT (t); return cand; } /* Return the value of element I of VECTOR_CST T as a wide_int. */ wide_int vector_cst_int_elt (const_tree t, unsigned int i) { /* First handle elements that are directly encoded. */ unsigned int encoded_nelts = vector_cst_encoded_nelts (t); if (i < encoded_nelts) return wi::to_wide (VECTOR_CST_ENCODED_ELT (t, i)); /* Identify the pattern that contains element I and work out the index of the last encoded element for that pattern. */ unsigned int npatterns = VECTOR_CST_NPATTERNS (t); unsigned int pattern = i % npatterns; unsigned int count = i / npatterns; unsigned int final_i = encoded_nelts - npatterns + pattern; /* If there are no steps, the final encoded value is the right one. */ if (!VECTOR_CST_STEPPED_P (t)) return wi::to_wide (VECTOR_CST_ENCODED_ELT (t, final_i)); /* Otherwise work out the value from the last two encoded elements. */ tree v1 = VECTOR_CST_ENCODED_ELT (t, final_i - npatterns); tree v2 = VECTOR_CST_ENCODED_ELT (t, final_i); wide_int diff = wi::to_wide (v2) - wi::to_wide (v1); return wi::to_wide (v2) + (count - 2) * diff; } /* Return the value of element I of VECTOR_CST T. */ tree vector_cst_elt (const_tree t, unsigned int i) { /* First handle elements that are directly encoded. */ unsigned int encoded_nelts = vector_cst_encoded_nelts (t); if (i < encoded_nelts) return VECTOR_CST_ENCODED_ELT (t, i); /* If there are no steps, the final encoded value is the right one. */ if (!VECTOR_CST_STEPPED_P (t)) { /* Identify the pattern that contains element I and work out the index of the last encoded element for that pattern. */ unsigned int npatterns = VECTOR_CST_NPATTERNS (t); unsigned int pattern = i % npatterns; unsigned int final_i = encoded_nelts - npatterns + pattern; return VECTOR_CST_ENCODED_ELT (t, final_i); } /* Otherwise work out the value from the last two encoded elements. */ return wide_int_to_tree (TREE_TYPE (TREE_TYPE (t)), vector_cst_int_elt (t, i)); } /* Given an initializer INIT, return TRUE if INIT is zero or some aggregate of zeros. Otherwise return FALSE. If NONZERO is not null, set *NONZERO if and only if INIT is known not to be all zeros. The combination of return value of false and *NONZERO false implies that INIT may but need not be all zeros. Other combinations indicate definitive answers. */ bool initializer_zerop (const_tree init, bool *nonzero /* = NULL */) { bool dummy; if (!nonzero) nonzero = &dummy; /* Conservatively clear NONZERO and set it only if INIT is definitely not all zero. */ *nonzero = false; STRIP_NOPS (init); unsigned HOST_WIDE_INT off = 0; switch (TREE_CODE (init)) { case INTEGER_CST: if (integer_zerop (init)) return true; *nonzero = true; return false; case REAL_CST: /* ??? Note that this is not correct for C4X float formats. There, a bit pattern of all zeros is 1.0; 0.0 is encoded with the most negative exponent. */ if (real_zerop (init) && !REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (init))) return true; *nonzero = true; return false; case FIXED_CST: if (fixed_zerop (init)) return true; *nonzero = true; return false; case COMPLEX_CST: if (integer_zerop (init) || (real_zerop (init) && !REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_REALPART (init))) && !REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_IMAGPART (init))))) return true; *nonzero = true; return false; case VECTOR_CST: if (VECTOR_CST_NPATTERNS (init) == 1 && VECTOR_CST_DUPLICATE_P (init) && initializer_zerop (VECTOR_CST_ENCODED_ELT (init, 0))) return true; *nonzero = true; return false; case CONSTRUCTOR: { if (TREE_CLOBBER_P (init)) return false; unsigned HOST_WIDE_INT idx; tree elt; FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init), idx, elt) if (!initializer_zerop (elt, nonzero)) return false; return true; } case MEM_REF: { tree arg = TREE_OPERAND (init, 0); if (TREE_CODE (arg) != ADDR_EXPR) return false; tree offset = TREE_OPERAND (init, 1); if (TREE_CODE (offset) != INTEGER_CST || !tree_fits_uhwi_p (offset)) return false; off = tree_to_uhwi (offset); if (INT_MAX < off) return false; arg = TREE_OPERAND (arg, 0); if (TREE_CODE (arg) != STRING_CST) return false; init = arg; } /* Fall through. */ case STRING_CST: { gcc_assert (off <= INT_MAX); int i = off; int n = TREE_STRING_LENGTH (init); if (n <= i) return false; /* We need to loop through all elements to handle cases like "\0" and "\0foobar". */ for (i = 0; i < n; ++i) if (TREE_STRING_POINTER (init)[i] != '\0') { *nonzero = true; return false; } return true; } default: return false; } } /* Return true if EXPR is an initializer expression in which every element is a constant that is numerically equal to 0 or 1. The elements do not need to be equal to each other. */ bool initializer_each_zero_or_onep (const_tree expr) { STRIP_ANY_LOCATION_WRAPPER (expr); switch (TREE_CODE (expr)) { case INTEGER_CST: return integer_zerop (expr) || integer_onep (expr); case REAL_CST: return real_zerop (expr) || real_onep (expr); case VECTOR_CST: { unsigned HOST_WIDE_INT nelts = vector_cst_encoded_nelts (expr); if (VECTOR_CST_STEPPED_P (expr) && !TYPE_VECTOR_SUBPARTS (TREE_TYPE (expr)).is_constant (&nelts)) return false; for (unsigned int i = 0; i < nelts; ++i) { tree elt = vector_cst_elt (expr, i); if (!initializer_each_zero_or_onep (elt)) return false; } return true; } default: return false; } } /* Check if vector VEC consists of all the equal elements and that the number of elements corresponds to the type of VEC. The function returns first element of the vector or NULL_TREE if the vector is not uniform. */ tree uniform_vector_p (const_tree vec) { tree first, t; unsigned HOST_WIDE_INT i, nelts; if (vec == NULL_TREE) return NULL_TREE; gcc_assert (VECTOR_TYPE_P (TREE_TYPE (vec))); if (TREE_CODE (vec) == VEC_DUPLICATE_EXPR) return TREE_OPERAND (vec, 0); else if (TREE_CODE (vec) == VECTOR_CST) { if (VECTOR_CST_NPATTERNS (vec) == 1 && VECTOR_CST_DUPLICATE_P (vec)) return VECTOR_CST_ENCODED_ELT (vec, 0); return NULL_TREE; } else if (TREE_CODE (vec) == CONSTRUCTOR && TYPE_VECTOR_SUBPARTS (TREE_TYPE (vec)).is_constant (&nelts)) { first = error_mark_node; FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (vec), i, t) { if (i == 0) { first = t; continue; } if (!operand_equal_p (first, t, 0)) return NULL_TREE; } if (i != nelts) return NULL_TREE; return first; } return NULL_TREE; } /* If the argument is INTEGER_CST, return it. If the argument is vector with all elements the same INTEGER_CST, return that INTEGER_CST. Otherwise return NULL_TREE. Look through location wrappers. */ tree uniform_integer_cst_p (tree t) { STRIP_ANY_LOCATION_WRAPPER (t); if (TREE_CODE (t) == INTEGER_CST) return t; if (VECTOR_TYPE_P (TREE_TYPE (t))) { t = uniform_vector_p (t); if (t && TREE_CODE (t) == INTEGER_CST) return t; } return NULL_TREE; } /* If VECTOR_CST T has a single nonzero element, return the index of that element, otherwise return -1. */ int single_nonzero_element (const_tree t) { unsigned HOST_WIDE_INT nelts; unsigned int repeat_nelts; if (VECTOR_CST_NELTS (t).is_constant (&nelts)) repeat_nelts = nelts; else if (VECTOR_CST_NELTS_PER_PATTERN (t) == 2) { nelts = vector_cst_encoded_nelts (t); repeat_nelts = VECTOR_CST_NPATTERNS (t); } else return -1; int res = -1; for (unsigned int i = 0; i < nelts; ++i) { tree elt = vector_cst_elt (t, i); if (!integer_zerop (elt) && !real_zerop (elt)) { if (res >= 0 || i >= repeat_nelts) return -1; res = i; } } return res; } /* Build an empty statement at location LOC. */ tree build_empty_stmt (location_t loc) { tree t = build1 (NOP_EXPR, void_type_node, size_zero_node); SET_EXPR_LOCATION (t, loc); return t; } /* Build an OpenMP clause with code CODE. LOC is the location of the clause. */ tree build_omp_clause (location_t loc, enum omp_clause_code code) { tree t; int size, length; length = omp_clause_num_ops[code]; size = (sizeof (struct tree_omp_clause) + (length - 1) * sizeof (tree)); record_node_allocation_statistics (OMP_CLAUSE, size); t = (tree) ggc_internal_alloc (size); memset (t, 0, size); TREE_SET_CODE (t, OMP_CLAUSE); OMP_CLAUSE_SET_CODE (t, code); OMP_CLAUSE_LOCATION (t) = loc; return t; } /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1. Except for the CODE and operand count field, other storage for the object is initialized to zeros. */ tree build_vl_exp (enum tree_code code, int len MEM_STAT_DECL) { tree t; int length = (len - 1) * sizeof (tree) + sizeof (struct tree_exp); gcc_assert (TREE_CODE_CLASS (code) == tcc_vl_exp); gcc_assert (len >= 1); record_node_allocation_statistics (code, length); t = ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT); TREE_SET_CODE (t, code); /* Can't use TREE_OPERAND to store the length because if checking is enabled, it will try to check the length before we store it. :-P */ t->exp.operands[0] = build_int_cst (sizetype, len); return t; } /* Helper function for build_call_* functions; build a CALL_EXPR with indicated RETURN_TYPE, FN, and NARGS, but do not initialize any of the argument slots. */ static tree build_call_1 (tree return_type, tree fn, int nargs) { tree t; t = build_vl_exp (CALL_EXPR, nargs + 3); TREE_TYPE (t) = return_type; CALL_EXPR_FN (t) = fn; CALL_EXPR_STATIC_CHAIN (t) = NULL; return t; } /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and FN and a null static chain slot. NARGS is the number of call arguments which are specified as "..." arguments. */ tree build_call_nary (tree return_type, tree fn, int nargs, ...) { tree ret; va_list args; va_start (args, nargs); ret = build_call_valist (return_type, fn, nargs, args); va_end (args); return ret; } /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and FN and a null static chain slot. NARGS is the number of call arguments which are specified as a va_list ARGS. */ tree build_call_valist (tree return_type, tree fn, int nargs, va_list args) { tree t; int i; t = build_call_1 (return_type, fn, nargs); for (i = 0; i < nargs; i++) CALL_EXPR_ARG (t, i) = va_arg (args, tree); process_call_operands (t); return t; } /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and FN and a null static chain slot. NARGS is the number of call arguments which are specified as a tree array ARGS. */ tree build_call_array_loc (location_t loc, tree return_type, tree fn, int nargs, const tree *args) { tree t; int i; t = build_call_1 (return_type, fn, nargs); for (i = 0; i < nargs; i++) CALL_EXPR_ARG (t, i) = args[i]; process_call_operands (t); SET_EXPR_LOCATION (t, loc); return t; } /* Like build_call_array, but takes a vec. */ tree build_call_vec (tree return_type, tree fn, vec *args) { tree ret, t; unsigned int ix; ret = build_call_1 (return_type, fn, vec_safe_length (args)); FOR_EACH_VEC_SAFE_ELT (args, ix, t) CALL_EXPR_ARG (ret, ix) = t; process_call_operands (ret); return ret; } /* Conveniently construct a function call expression. FNDECL names the function to be called and N arguments are passed in the array ARGARRAY. */ tree build_call_expr_loc_array (location_t loc, tree fndecl, int n, tree *argarray) { tree fntype = TREE_TYPE (fndecl); tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl); return fold_build_call_array_loc (loc, TREE_TYPE (fntype), fn, n, argarray); } /* Conveniently construct a function call expression. FNDECL names the function to be called and the arguments are passed in the vector VEC. */ tree build_call_expr_loc_vec (location_t loc, tree fndecl, vec *vec) { return build_call_expr_loc_array (loc, fndecl, vec_safe_length (vec), vec_safe_address (vec)); } /* Conveniently construct a function call expression. FNDECL names the function to be called, N is the number of arguments, and the "..." parameters are the argument expressions. */ tree build_call_expr_loc (location_t loc, tree fndecl, int n, ...) { va_list ap; tree *argarray = XALLOCAVEC (tree, n); int i; va_start (ap, n); for (i = 0; i < n; i++) argarray[i] = va_arg (ap, tree); va_end (ap); return build_call_expr_loc_array (loc, fndecl, n, argarray); } /* Like build_call_expr_loc (UNKNOWN_LOCATION, ...). Duplicated because varargs macros aren't supported by all bootstrap compilers. */ tree build_call_expr (tree fndecl, int n, ...) { va_list ap; tree *argarray = XALLOCAVEC (tree, n); int i; va_start (ap, n); for (i = 0; i < n; i++) argarray[i] = va_arg (ap, tree); va_end (ap); return build_call_expr_loc_array (UNKNOWN_LOCATION, fndecl, n, argarray); } /* Build an internal call to IFN, with arguments ARGS[0:N-1] and with return type TYPE. This is just like CALL_EXPR, except its CALL_EXPR_FN is NULL. It will get gimplified later into an ordinary internal function. */ tree build_call_expr_internal_loc_array (location_t loc, internal_fn ifn, tree type, int n, const tree *args) { tree t = build_call_1 (type, NULL_TREE, n); for (int i = 0; i < n; ++i) CALL_EXPR_ARG (t, i) = args[i]; SET_EXPR_LOCATION (t, loc); CALL_EXPR_IFN (t) = ifn; process_call_operands (t); return t; } /* Build internal call expression. This is just like CALL_EXPR, except its CALL_EXPR_FN is NULL. It will get gimplified later into ordinary internal function. */ tree build_call_expr_internal_loc (location_t loc, enum internal_fn ifn, tree type, int n, ...) { va_list ap; tree *argarray = XALLOCAVEC (tree, n); int i; va_start (ap, n); for (i = 0; i < n; i++) argarray[i] = va_arg (ap, tree); va_end (ap); return build_call_expr_internal_loc_array (loc, ifn, type, n, argarray); } /* Return a function call to FN, if the target is guaranteed to support it, or null otherwise. N is the number of arguments, passed in the "...", and TYPE is the type of the return value. */ tree maybe_build_call_expr_loc (location_t loc, combined_fn fn, tree type, int n, ...) { va_list ap; tree *argarray = XALLOCAVEC (tree, n); int i; va_start (ap, n); for (i = 0; i < n; i++) argarray[i] = va_arg (ap, tree); va_end (ap); if (internal_fn_p (fn)) { internal_fn ifn = as_internal_fn (fn); if (direct_internal_fn_p (ifn)) { tree_pair types = direct_internal_fn_types (ifn, type, argarray); if (!direct_internal_fn_supported_p (ifn, types, OPTIMIZE_FOR_BOTH)) return NULL_TREE; } return build_call_expr_internal_loc_array (loc, ifn, type, n, argarray); } else { tree fndecl = builtin_decl_implicit (as_builtin_fn (fn)); if (!fndecl) return NULL_TREE; return build_call_expr_loc_array (loc, fndecl, n, argarray); } } /* Return a function call to the appropriate builtin alloca variant. SIZE is the size to be allocated. ALIGN, if non-zero, is the requested alignment of the allocated area. MAX_SIZE, if non-negative, is an upper bound for SIZE in case it is not a fixed value. */ tree build_alloca_call_expr (tree size, unsigned int align, HOST_WIDE_INT max_size) { if (max_size >= 0) { tree t = builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX); return build_call_expr (t, 3, size, size_int (align), size_int (max_size)); } else if (align > 0) { tree t = builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN); return build_call_expr (t, 2, size, size_int (align)); } else { tree t = builtin_decl_explicit (BUILT_IN_ALLOCA); return build_call_expr (t, 1, size); } } /* Create a new constant string literal of type ELTYPE[SIZE] (or LEN if SIZE == -1) and return a tree node representing char* pointer to it as an ADDR_EXPR (ARRAY_REF (ELTYPE, ...)). When STR is nonnull the STRING_CST value is the LEN bytes at STR (the representation of the string, which may be wide). Otherwise it's all zeros. */ tree build_string_literal (unsigned len, const char *str /* = NULL */, tree eltype /* = char_type_node */, unsigned HOST_WIDE_INT size /* = -1 */) { tree t = build_string (len, str); /* Set the maximum valid index based on the string length or SIZE. */ unsigned HOST_WIDE_INT maxidx = (size == HOST_WIDE_INT_M1U ? len : size) - 1; tree index = build_index_type (size_int (maxidx)); eltype = build_type_variant (eltype, 1, 0); tree type = build_array_type (eltype, index); TREE_TYPE (t) = type; TREE_CONSTANT (t) = 1; TREE_READONLY (t) = 1; TREE_STATIC (t) = 1; type = build_pointer_type (eltype); t = build1 (ADDR_EXPR, type, build4 (ARRAY_REF, eltype, t, integer_zero_node, NULL_TREE, NULL_TREE)); return t; } /* Return true if T (assumed to be a DECL) must be assigned a memory location. */ bool needs_to_live_in_memory (const_tree t) { return (TREE_ADDRESSABLE (t) || is_global_var (t) || (TREE_CODE (t) == RESULT_DECL && !DECL_BY_REFERENCE (t) && aggregate_value_p (t, current_function_decl))); } /* Return value of a constant X and sign-extend it. */ HOST_WIDE_INT int_cst_value (const_tree x) { unsigned bits = TYPE_PRECISION (TREE_TYPE (x)); unsigned HOST_WIDE_INT val = TREE_INT_CST_LOW (x); /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */ gcc_assert (cst_and_fits_in_hwi (x)); if (bits < HOST_BITS_PER_WIDE_INT) { bool negative = ((val >> (bits - 1)) & 1) != 0; if (negative) val |= HOST_WIDE_INT_M1U << (bits - 1) << 1; else val &= ~(HOST_WIDE_INT_M1U << (bits - 1) << 1); } return val; } /* If TYPE is an integral or pointer type, return an integer type with the same precision which is unsigned iff UNSIGNEDP is true, or itself if TYPE is already an integer type of signedness UNSIGNEDP. If TYPE is a floating-point type, return an integer type with the same bitsize and with the signedness given by UNSIGNEDP; this is useful when doing bit-level operations on a floating-point value. */ tree signed_or_unsigned_type_for (int unsignedp, tree type) { if (ANY_INTEGRAL_TYPE_P (type) && TYPE_UNSIGNED (type) == unsignedp) return type; if (TREE_CODE (type) == VECTOR_TYPE) { tree inner = TREE_TYPE (type); tree inner2 = signed_or_unsigned_type_for (unsignedp, inner); if (!inner2) return NULL_TREE; if (inner == inner2) return type; return build_vector_type (inner2, TYPE_VECTOR_SUBPARTS (type)); } if (TREE_CODE (type) == COMPLEX_TYPE) { tree inner = TREE_TYPE (type); tree inner2 = signed_or_unsigned_type_for (unsignedp, inner); if (!inner2) return NULL_TREE; if (inner == inner2) return type; return build_complex_type (inner2); } unsigned int bits; if (INTEGRAL_TYPE_P (type) || POINTER_TYPE_P (type) || TREE_CODE (type) == OFFSET_TYPE) bits = TYPE_PRECISION (type); else if (TREE_CODE (type) == REAL_TYPE) bits = GET_MODE_BITSIZE (SCALAR_TYPE_MODE (type)); else return NULL_TREE; return build_nonstandard_integer_type (bits, unsignedp); } /* If TYPE is an integral or pointer type, return an integer type with the same precision which is unsigned, or itself if TYPE is already an unsigned integer type. If TYPE is a floating-point type, return an unsigned integer type with the same bitsize as TYPE. */ tree unsigned_type_for (tree type) { return signed_or_unsigned_type_for (1, type); } /* If TYPE is an integral or pointer type, return an integer type with the same precision which is signed, or itself if TYPE is already a signed integer type. If TYPE is a floating-point type, return a signed integer type with the same bitsize as TYPE. */ tree signed_type_for (tree type) { return signed_or_unsigned_type_for (0, type); } /* If TYPE is a vector type, return a signed integer vector type with the same width and number of subparts. Otherwise return boolean_type_node. */ tree truth_type_for (tree type) { if (TREE_CODE (type) == VECTOR_TYPE) { if (VECTOR_BOOLEAN_TYPE_P (type)) return type; return build_truth_vector_type_for (type); } else return boolean_type_node; } /* Returns the largest value obtainable by casting something in INNER type to OUTER type. */ tree upper_bound_in_type (tree outer, tree inner) { unsigned int det = 0; unsigned oprec = TYPE_PRECISION (outer); unsigned iprec = TYPE_PRECISION (inner); unsigned prec; /* Compute a unique number for every combination. */ det |= (oprec > iprec) ? 4 : 0; det |= TYPE_UNSIGNED (outer) ? 2 : 0; det |= TYPE_UNSIGNED (inner) ? 1 : 0; /* Determine the exponent to use. */ switch (det) { case 0: case 1: /* oprec <= iprec, outer: signed, inner: don't care. */ prec = oprec - 1; break; case 2: case 3: /* oprec <= iprec, outer: unsigned, inner: don't care. */ prec = oprec; break; case 4: /* oprec > iprec, outer: signed, inner: signed. */ prec = iprec - 1; break; case 5: /* oprec > iprec, outer: signed, inner: unsigned. */ prec = iprec; break; case 6: /* oprec > iprec, outer: unsigned, inner: signed. */ prec = oprec; break; case 7: /* oprec > iprec, outer: unsigned, inner: unsigned. */ prec = iprec; break; default: gcc_unreachable (); } return wide_int_to_tree (outer, wi::mask (prec, false, TYPE_PRECISION (outer))); } /* Returns the smallest value obtainable by casting something in INNER type to OUTER type. */ tree lower_bound_in_type (tree outer, tree inner) { unsigned oprec = TYPE_PRECISION (outer); unsigned iprec = TYPE_PRECISION (inner); /* If OUTER type is unsigned, we can definitely cast 0 to OUTER type and obtain 0. */ if (TYPE_UNSIGNED (outer) /* If we are widening something of an unsigned type, OUTER type contains all values of INNER type. In particular, both INNER and OUTER types have zero in common. */ || (oprec > iprec && TYPE_UNSIGNED (inner))) return build_int_cst (outer, 0); else { /* If we are widening a signed type to another signed type, we want to obtain -2^^(iprec-1). If we are keeping the precision or narrowing to a signed type, we want to obtain -2^(oprec-1). */ unsigned prec = oprec > iprec ? iprec : oprec; return wide_int_to_tree (outer, wi::mask (prec - 1, true, TYPE_PRECISION (outer))); } } /* Return nonzero if two operands that are suitable for PHI nodes are necessarily equal. Specifically, both ARG0 and ARG1 must be either SSA_NAME or invariant. Note that this is strictly an optimization. That is, callers of this function can directly call operand_equal_p and get the same result, only slower. */ int operand_equal_for_phi_arg_p (const_tree arg0, const_tree arg1) { if (arg0 == arg1) return 1; if (TREE_CODE (arg0) == SSA_NAME || TREE_CODE (arg1) == SSA_NAME) return 0; return operand_equal_p (arg0, arg1, 0); } /* Returns number of zeros at the end of binary representation of X. */ tree num_ending_zeros (const_tree x) { return build_int_cst (TREE_TYPE (x), wi::ctz (wi::to_wide (x))); } #define WALK_SUBTREE(NODE) \ do \ { \ result = walk_tree_1 (&(NODE), func, data, pset, lh); \ if (result) \ return result; \ } \ while (0) /* This is a subroutine of walk_tree that walks field of TYPE that are to be walked whenever a type is seen in the tree. Rest of operands and return value are as for walk_tree. */ static tree walk_type_fields (tree type, walk_tree_fn func, void *data, hash_set *pset, walk_tree_lh lh) { tree result = NULL_TREE; switch (TREE_CODE (type)) { case POINTER_TYPE: case REFERENCE_TYPE: case VECTOR_TYPE: /* We have to worry about mutually recursive pointers. These can't be written in C. They can in Ada. It's pathological, but there's an ACATS test (c38102a) that checks it. Deal with this by checking if we're pointing to another pointer, that one points to another pointer, that one does too, and we have no htab. If so, get a hash table. We check three levels deep to avoid the cost of the hash table if we don't need one. */ if (POINTER_TYPE_P (TREE_TYPE (type)) && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type))) && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type)))) && !pset) { result = walk_tree_without_duplicates (&TREE_TYPE (type), func, data); if (result) return result; break; } /* fall through */ case COMPLEX_TYPE: WALK_SUBTREE (TREE_TYPE (type)); break; case METHOD_TYPE: WALK_SUBTREE (TYPE_METHOD_BASETYPE (type)); /* Fall through. */ case FUNCTION_TYPE: WALK_SUBTREE (TREE_TYPE (type)); { tree arg; /* We never want to walk into default arguments. */ for (arg = TYPE_ARG_TYPES (type); arg; arg = TREE_CHAIN (arg)) WALK_SUBTREE (TREE_VALUE (arg)); } break; case ARRAY_TYPE: /* Don't follow this nodes's type if a pointer for fear that we'll have infinite recursion. If we have a PSET, then we need not fear. */ if (pset || (!POINTER_TYPE_P (TREE_TYPE (type)) && TREE_CODE (TREE_TYPE (type)) != OFFSET_TYPE)) WALK_SUBTREE (TREE_TYPE (type)); WALK_SUBTREE (TYPE_DOMAIN (type)); break; case OFFSET_TYPE: WALK_SUBTREE (TREE_TYPE (type)); WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type)); break; default: break; } return NULL_TREE; } /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is called with the DATA and the address of each sub-tree. If FUNC returns a non-NULL value, the traversal is stopped, and the value returned by FUNC is returned. If PSET is non-NULL it is used to record the nodes visited, and to avoid visiting a node more than once. */ tree walk_tree_1 (tree *tp, walk_tree_fn func, void *data, hash_set *pset, walk_tree_lh lh) { enum tree_code code; int walk_subtrees; tree result; #define WALK_SUBTREE_TAIL(NODE) \ do \ { \ tp = & (NODE); \ goto tail_recurse; \ } \ while (0) tail_recurse: /* Skip empty subtrees. */ if (!*tp) return NULL_TREE; /* Don't walk the same tree twice, if the user has requested that we avoid doing so. */ if (pset && pset->add (*tp)) return NULL_TREE; /* Call the function. */ walk_subtrees = 1; result = (*func) (tp, &walk_subtrees, data); /* If we found something, return it. */ if (result) return result; code = TREE_CODE (*tp); /* Even if we didn't, FUNC may have decided that there was nothing interesting below this point in the tree. */ if (!walk_subtrees) { /* But we still need to check our siblings. */ if (code == TREE_LIST) WALK_SUBTREE_TAIL (TREE_CHAIN (*tp)); else if (code == OMP_CLAUSE) WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp)); else return NULL_TREE; } if (lh) { result = (*lh) (tp, &walk_subtrees, func, data, pset); if (result || !walk_subtrees) return result; } switch (code) { case ERROR_MARK: case IDENTIFIER_NODE: case INTEGER_CST: case REAL_CST: case FIXED_CST: case VECTOR_CST: case STRING_CST: case BLOCK: case PLACEHOLDER_EXPR: case SSA_NAME: case FIELD_DECL: case RESULT_DECL: /* None of these have subtrees other than those already walked above. */ break; case TREE_LIST: WALK_SUBTREE (TREE_VALUE (*tp)); WALK_SUBTREE_TAIL (TREE_CHAIN (*tp)); break; case TREE_VEC: { int len = TREE_VEC_LENGTH (*tp); if (len == 0) break; /* Walk all elements but the first. */ while (--len) WALK_SUBTREE (TREE_VEC_ELT (*tp, len)); /* Now walk the first one as a tail call. */ WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp, 0)); } case COMPLEX_CST: WALK_SUBTREE (TREE_REALPART (*tp)); WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp)); case CONSTRUCTOR: { unsigned HOST_WIDE_INT idx; constructor_elt *ce; for (idx = 0; vec_safe_iterate (CONSTRUCTOR_ELTS (*tp), idx, &ce); idx++) WALK_SUBTREE (ce->value); } break; case SAVE_EXPR: WALK_SUBTREE_TAIL (TREE_OPERAND (*tp, 0)); case BIND_EXPR: { tree decl; for (decl = BIND_EXPR_VARS (*tp); decl; decl = DECL_CHAIN (decl)) { /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk into declarations that are just mentioned, rather than declared; they don't really belong to this part of the tree. And, we can see cycles: the initializer for a declaration can refer to the declaration itself. */ WALK_SUBTREE (DECL_INITIAL (decl)); WALK_SUBTREE (DECL_SIZE (decl)); WALK_SUBTREE (DECL_SIZE_UNIT (decl)); } WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp)); } case STATEMENT_LIST: { tree_stmt_iterator i; for (i = tsi_start (*tp); !tsi_end_p (i); tsi_next (&i)) WALK_SUBTREE (*tsi_stmt_ptr (i)); } break; case OMP_CLAUSE: switch (OMP_CLAUSE_CODE (*tp)) { case OMP_CLAUSE_GANG: WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp, 1)); /* FALLTHRU */ case OMP_CLAUSE_ASYNC: case OMP_CLAUSE_WAIT: case OMP_CLAUSE_WORKER: case OMP_CLAUSE_VECTOR: case OMP_CLAUSE_NUM_GANGS: case OMP_CLAUSE_NUM_WORKERS: case OMP_CLAUSE_VECTOR_LENGTH: case OMP_CLAUSE_PRIVATE: case OMP_CLAUSE_SHARED: case OMP_CLAUSE_FIRSTPRIVATE: case OMP_CLAUSE_COPYIN: case OMP_CLAUSE_COPYPRIVATE: case OMP_CLAUSE_FINAL: case OMP_CLAUSE_IF: case OMP_CLAUSE_NUM_THREADS: case OMP_CLAUSE_SCHEDULE: case OMP_CLAUSE_UNIFORM: case OMP_CLAUSE_DEPEND: case OMP_CLAUSE_NONTEMPORAL: case OMP_CLAUSE_NUM_TEAMS: case OMP_CLAUSE_THREAD_LIMIT: case OMP_CLAUSE_DEVICE: case OMP_CLAUSE_DIST_SCHEDULE: case OMP_CLAUSE_SAFELEN: case OMP_CLAUSE_SIMDLEN: case OMP_CLAUSE_ORDERED: case OMP_CLAUSE_PRIORITY: case OMP_CLAUSE_GRAINSIZE: case OMP_CLAUSE_NUM_TASKS: case OMP_CLAUSE_HINT: case OMP_CLAUSE_TO_DECLARE: case OMP_CLAUSE_LINK: case OMP_CLAUSE_USE_DEVICE_PTR: case OMP_CLAUSE_USE_DEVICE_ADDR: case OMP_CLAUSE_IS_DEVICE_PTR: case OMP_CLAUSE_INCLUSIVE: case OMP_CLAUSE_EXCLUSIVE: case OMP_CLAUSE__LOOPTEMP_: case OMP_CLAUSE__REDUCTEMP_: case OMP_CLAUSE__CONDTEMP_: case OMP_CLAUSE__SCANTEMP_: case OMP_CLAUSE__SIMDUID_: WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp, 0)); /* FALLTHRU */ case OMP_CLAUSE_INDEPENDENT: case OMP_CLAUSE_NOWAIT: case OMP_CLAUSE_DEFAULT: case OMP_CLAUSE_UNTIED: case OMP_CLAUSE_MERGEABLE: case OMP_CLAUSE_PROC_BIND: case OMP_CLAUSE_DEVICE_TYPE: case OMP_CLAUSE_INBRANCH: case OMP_CLAUSE_NOTINBRANCH: case OMP_CLAUSE_FOR: case OMP_CLAUSE_PARALLEL: case OMP_CLAUSE_SECTIONS: case OMP_CLAUSE_TASKGROUP: case OMP_CLAUSE_NOGROUP: case OMP_CLAUSE_THREADS: case OMP_CLAUSE_SIMD: case OMP_CLAUSE_DEFAULTMAP: case OMP_CLAUSE_ORDER: case OMP_CLAUSE_BIND: case OMP_CLAUSE_AUTO: case OMP_CLAUSE_SEQ: case OMP_CLAUSE_TILE: case OMP_CLAUSE__SIMT_: case OMP_CLAUSE_IF_PRESENT: case OMP_CLAUSE_FINALIZE: WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp)); case OMP_CLAUSE_LASTPRIVATE: WALK_SUBTREE (OMP_CLAUSE_DECL (*tp)); WALK_SUBTREE (OMP_CLAUSE_LASTPRIVATE_STMT (*tp)); WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp)); case OMP_CLAUSE_COLLAPSE: { int i; for (i = 0; i < 3; i++) WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp, i)); WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp)); } case OMP_CLAUSE_LINEAR: WALK_SUBTREE (OMP_CLAUSE_DECL (*tp)); WALK_SUBTREE (OMP_CLAUSE_LINEAR_STEP (*tp)); WALK_SUBTREE (OMP_CLAUSE_LINEAR_STMT (*tp)); WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp)); case OMP_CLAUSE_ALIGNED: case OMP_CLAUSE_ALLOCATE: case OMP_CLAUSE_FROM: case OMP_CLAUSE_TO: case OMP_CLAUSE_MAP: case OMP_CLAUSE__CACHE_: WALK_SUBTREE (OMP_CLAUSE_DECL (*tp)); WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp, 1)); WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp)); case OMP_CLAUSE_REDUCTION: case OMP_CLAUSE_TASK_REDUCTION: case OMP_CLAUSE_IN_REDUCTION: { int i; for (i = 0; i < 5; i++) WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp, i)); WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp)); } default: gcc_unreachable (); } break; case TARGET_EXPR: { int i, len; /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same. But, we only want to walk once. */ len = (TREE_OPERAND (*tp, 3) == TREE_OPERAND (*tp, 1)) ? 2 : 3; for (i = 0; i < len; ++i) WALK_SUBTREE (TREE_OPERAND (*tp, i)); WALK_SUBTREE_TAIL (TREE_OPERAND (*tp, len)); } case DECL_EXPR: /* If this is a TYPE_DECL, walk into the fields of the type that it's defining. We only want to walk into these fields of a type in this case and not in the general case of a mere reference to the type. The criterion is as follows: if the field can be an expression, it must be walked only here. This should be in keeping with the fields that are directly gimplified in gimplify_type_sizes in order for the mark/copy-if-shared/unmark machinery of the gimplifier to work with variable-sized types. Note that DECLs get walked as part of processing the BIND_EXPR. */ if (TREE_CODE (DECL_EXPR_DECL (*tp)) == TYPE_DECL) { /* Call the function for the decl so e.g. copy_tree_body_r can replace it with the remapped one. */ result = (*func) (&DECL_EXPR_DECL (*tp), &walk_subtrees, data); if (result || !walk_subtrees) return result; tree *type_p = &TREE_TYPE (DECL_EXPR_DECL (*tp)); if (TREE_CODE (*type_p) == ERROR_MARK) return NULL_TREE; /* Call the function for the type. See if it returns anything or doesn't want us to continue. If we are to continue, walk both the normal fields and those for the declaration case. */ result = (*func) (type_p, &walk_subtrees, data); if (result || !walk_subtrees) return result; /* But do not walk a pointed-to type since it may itself need to be walked in the declaration case if it isn't anonymous. */ if (!POINTER_TYPE_P (*type_p)) { result = walk_type_fields (*type_p, func, data, pset, lh); if (result) return result; } /* If this is a record type, also walk the fields. */ if (RECORD_OR_UNION_TYPE_P (*type_p)) { tree field; for (field = TYPE_FIELDS (*type_p); field; field = DECL_CHAIN (field)) { /* We'd like to look at the type of the field, but we can easily get infinite recursion. So assume it's pointed to elsewhere in the tree. Also, ignore things that aren't fields. */ if (TREE_CODE (field) != FIELD_DECL) continue; WALK_SUBTREE (DECL_FIELD_OFFSET (field)); WALK_SUBTREE (DECL_SIZE (field)); WALK_SUBTREE (DECL_SIZE_UNIT (field)); if (TREE_CODE (*type_p) == QUAL_UNION_TYPE) WALK_SUBTREE (DECL_QUALIFIER (field)); } } /* Same for scalar types. */ else if (TREE_CODE (*type_p) == BOOLEAN_TYPE || TREE_CODE (*type_p) == ENUMERAL_TYPE || TREE_CODE (*type_p) == INTEGER_TYPE || TREE_CODE (*type_p) == FIXED_POINT_TYPE || TREE_CODE (*type_p) == REAL_TYPE) { WALK_SUBTREE (TYPE_MIN_VALUE (*type_p)); WALK_SUBTREE (TYPE_MAX_VALUE (*type_p)); } WALK_SUBTREE (TYPE_SIZE (*type_p)); WALK_SUBTREE_TAIL (TYPE_SIZE_UNIT (*type_p)); } /* FALLTHRU */ default: if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))) { int i, len; /* Walk over all the sub-trees of this operand. */ len = TREE_OPERAND_LENGTH (*tp); /* Go through the subtrees. We need to do this in forward order so that the scope of a FOR_EXPR is handled properly. */ if (len) { for (i = 0; i < len - 1; ++i) WALK_SUBTREE (TREE_OPERAND (*tp, i)); WALK_SUBTREE_TAIL (TREE_OPERAND (*tp, len - 1)); } } /* If this is a type, walk the needed fields in the type. */ else if (TYPE_P (*tp)) return walk_type_fields (*tp, func, data, pset, lh); break; } /* We didn't find what we were looking for. */ return NULL_TREE; #undef WALK_SUBTREE_TAIL } #undef WALK_SUBTREE /* Like walk_tree, but does not walk duplicate nodes more than once. */ tree walk_tree_without_duplicates_1 (tree *tp, walk_tree_fn func, void *data, walk_tree_lh lh) { tree result; hash_set pset; result = walk_tree_1 (tp, func, data, &pset, lh); return result; } tree tree_block (tree t) { const enum tree_code_class c = TREE_CODE_CLASS (TREE_CODE (t)); if (IS_EXPR_CODE_CLASS (c)) return LOCATION_BLOCK (t->exp.locus); gcc_unreachable (); return NULL; } void tree_set_block (tree t, tree b) { const enum tree_code_class c = TREE_CODE_CLASS (TREE_CODE (t)); if (IS_EXPR_CODE_CLASS (c)) { t->exp.locus = set_block (t->exp.locus, b); } else gcc_unreachable (); } /* Create a nameless artificial label and put it in the current function context. The label has a location of LOC. Returns the newly created label. */ tree create_artificial_label (location_t loc) { tree lab = build_decl (loc, LABEL_DECL, NULL_TREE, void_type_node); DECL_ARTIFICIAL (lab) = 1; DECL_IGNORED_P (lab) = 1; DECL_CONTEXT (lab) = current_function_decl; return lab; } /* Given a tree, try to return a useful variable name that we can use to prefix a temporary that is being assigned the value of the tree. I.E. given = &A, return A. */ const char * get_name (tree t) { tree stripped_decl; stripped_decl = t; STRIP_NOPS (stripped_decl); if (DECL_P (stripped_decl) && DECL_NAME (stripped_decl)) return IDENTIFIER_POINTER (DECL_NAME (stripped_decl)); else if (TREE_CODE (stripped_decl) == SSA_NAME) { tree name = SSA_NAME_IDENTIFIER (stripped_decl); if (!name) return NULL; return IDENTIFIER_POINTER (name); } else { switch (TREE_CODE (stripped_decl)) { case ADDR_EXPR: return get_name (TREE_OPERAND (stripped_decl, 0)); default: return NULL; } } } /* Return true if TYPE has a variable argument list. */ bool stdarg_p (const_tree fntype) { function_args_iterator args_iter; tree n = NULL_TREE, t; if (!fntype) return false; FOREACH_FUNCTION_ARGS (fntype, t, args_iter) { n = t; } return n != NULL_TREE && n != void_type_node; } /* Return true if TYPE has a prototype. */ bool prototype_p (const_tree fntype) { tree t; gcc_assert (fntype != NULL_TREE); t = TYPE_ARG_TYPES (fntype); return (t != NULL_TREE); } /* If BLOCK is inlined from an __attribute__((__artificial__)) routine, return pointer to location from where it has been called. */ location_t * block_nonartificial_location (tree block) { location_t *ret = NULL; while (block && TREE_CODE (block) == BLOCK && BLOCK_ABSTRACT_ORIGIN (block)) { tree ao = BLOCK_ABSTRACT_ORIGIN (block); if (TREE_CODE (ao) == FUNCTION_DECL) { /* If AO is an artificial inline, point RET to the call site locus at which it has been inlined and continue the loop, in case AO's caller is also an artificial inline. */ if (DECL_DECLARED_INLINE_P (ao) && lookup_attribute ("artificial", DECL_ATTRIBUTES (ao))) ret = &BLOCK_SOURCE_LOCATION (block); else break; } else if (TREE_CODE (ao) != BLOCK) break; block = BLOCK_SUPERCONTEXT (block); } return ret; } /* If EXP is inlined from an __attribute__((__artificial__)) function, return the location of the original call expression. */ location_t tree_nonartificial_location (tree exp) { location_t *loc = block_nonartificial_location (TREE_BLOCK (exp)); if (loc) return *loc; else return EXPR_LOCATION (exp); } /* Return the location into which EXP has been inlined. Analogous to tree_nonartificial_location() above but not limited to artificial functions declared inline. If SYSTEM_HEADER is true, return the macro expansion point of the location if it's in a system header */ location_t tree_inlined_location (tree exp, bool system_header /* = true */) { location_t loc = UNKNOWN_LOCATION; tree block = TREE_BLOCK (exp); while (block && TREE_CODE (block) == BLOCK && BLOCK_ABSTRACT_ORIGIN (block)) { tree ao = BLOCK_ABSTRACT_ORIGIN (block); if (TREE_CODE (ao) == FUNCTION_DECL) loc = BLOCK_SOURCE_LOCATION (block); else if (TREE_CODE (ao) != BLOCK) break; block = BLOCK_SUPERCONTEXT (block); } if (loc == UNKNOWN_LOCATION) loc = EXPR_LOCATION (exp); if (system_header) return expansion_point_location_if_in_system_header (loc); return loc; } /* These are the hash table functions for the hash table of OPTIMIZATION_NODE nodes. */ /* Return the hash code X, an OPTIMIZATION_NODE or TARGET_OPTION code. */ hashval_t cl_option_hasher::hash (tree x) { const_tree const t = x; const char *p; size_t i; size_t len = 0; hashval_t hash = 0; if (TREE_CODE (t) == OPTIMIZATION_NODE) { p = (const char *)TREE_OPTIMIZATION (t); len = sizeof (struct cl_optimization); } else if (TREE_CODE (t) == TARGET_OPTION_NODE) return cl_target_option_hash (TREE_TARGET_OPTION (t)); else gcc_unreachable (); /* assume most opt flags are just 0/1, some are 2-3, and a few might be something else. */ for (i = 0; i < len; i++) if (p[i]) hash = (hash << 4) ^ ((i << 2) | p[i]); return hash; } /* Return nonzero if the value represented by *X (an OPTIMIZATION or TARGET_OPTION tree node) is the same as that given by *Y, which is the same. */ bool cl_option_hasher::equal (tree x, tree y) { const_tree const xt = x; const_tree const yt = y; if (TREE_CODE (xt) != TREE_CODE (yt)) return 0; if (TREE_CODE (xt) == OPTIMIZATION_NODE) return cl_optimization_option_eq (TREE_OPTIMIZATION (xt), TREE_OPTIMIZATION (yt)); else if (TREE_CODE (xt) == TARGET_OPTION_NODE) return cl_target_option_eq (TREE_TARGET_OPTION (xt), TREE_TARGET_OPTION (yt)); else gcc_unreachable (); } /* Build an OPTIMIZATION_NODE based on the options in OPTS and OPTS_SET. */ tree build_optimization_node (struct gcc_options *opts, struct gcc_options *opts_set) { tree t; /* Use the cache of optimization nodes. */ cl_optimization_save (TREE_OPTIMIZATION (cl_optimization_node), opts, opts_set); tree *slot = cl_option_hash_table->find_slot (cl_optimization_node, INSERT); t = *slot; if (!t) { /* Insert this one into the hash table. */ t = cl_optimization_node; *slot = t; /* Make a new node for next time round. */ cl_optimization_node = make_node (OPTIMIZATION_NODE); } return t; } /* Build a TARGET_OPTION_NODE based on the options in OPTS and OPTS_SET. */ tree build_target_option_node (struct gcc_options *opts, struct gcc_options *opts_set) { tree t; /* Use the cache of optimization nodes. */ cl_target_option_save (TREE_TARGET_OPTION (cl_target_option_node), opts, opts_set); tree *slot = cl_option_hash_table->find_slot (cl_target_option_node, INSERT); t = *slot; if (!t) { /* Insert this one into the hash table. */ t = cl_target_option_node; *slot = t; /* Make a new node for next time round. */ cl_target_option_node = make_node (TARGET_OPTION_NODE); } return t; } /* Clear TREE_TARGET_GLOBALS of all TARGET_OPTION_NODE trees, so that they aren't saved during PCH writing. */ void prepare_target_option_nodes_for_pch (void) { hash_table::iterator iter = cl_option_hash_table->begin (); for (; iter != cl_option_hash_table->end (); ++iter) if (TREE_CODE (*iter) == TARGET_OPTION_NODE) TREE_TARGET_GLOBALS (*iter) = NULL; } /* Determine the "ultimate origin" of a block. */ tree block_ultimate_origin (const_tree block) { tree origin = BLOCK_ABSTRACT_ORIGIN (block); if (origin == NULL_TREE) return NULL_TREE; else { gcc_checking_assert ((DECL_P (origin) && DECL_ORIGIN (origin) == origin) || BLOCK_ORIGIN (origin) == origin); return origin; } } /* Return true iff conversion from INNER_TYPE to OUTER_TYPE generates no instruction. */ bool tree_nop_conversion_p (const_tree outer_type, const_tree inner_type) { /* Do not strip casts into or out of differing address spaces. */ if (POINTER_TYPE_P (outer_type) && TYPE_ADDR_SPACE (TREE_TYPE (outer_type)) != ADDR_SPACE_GENERIC) { if (!POINTER_TYPE_P (inner_type) || (TYPE_ADDR_SPACE (TREE_TYPE (outer_type)) != TYPE_ADDR_SPACE (TREE_TYPE (inner_type)))) return false; } else if (POINTER_TYPE_P (inner_type) && TYPE_ADDR_SPACE (TREE_TYPE (inner_type)) != ADDR_SPACE_GENERIC) { /* We already know that outer_type is not a pointer with a non-generic address space. */ return false; } /* Use precision rather then machine mode when we can, which gives the correct answer even for submode (bit-field) types. */ if ((INTEGRAL_TYPE_P (outer_type) || POINTER_TYPE_P (outer_type) || TREE_CODE (outer_type) == OFFSET_TYPE) && (INTEGRAL_TYPE_P (inner_type) || POINTER_TYPE_P (inner_type) || TREE_CODE (inner_type) == OFFSET_TYPE)) return TYPE_PRECISION (outer_type) == TYPE_PRECISION (inner_type); /* Otherwise fall back on comparing machine modes (e.g. for aggregate types, floats). */ return TYPE_MODE (outer_type) == TYPE_MODE (inner_type); } /* Return true iff conversion in EXP generates no instruction. Mark it inline so that we fully inline into the stripping functions even though we have two uses of this function. */ static inline bool tree_nop_conversion (const_tree exp) { tree outer_type, inner_type; if (location_wrapper_p (exp)) return true; if (!CONVERT_EXPR_P (exp) && TREE_CODE (exp) != NON_LVALUE_EXPR) return false; outer_type = TREE_TYPE (exp); inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); if (!inner_type || inner_type == error_mark_node) return false; return tree_nop_conversion_p (outer_type, inner_type); } /* Return true iff conversion in EXP generates no instruction. Don't consider conversions changing the signedness. */ static bool tree_sign_nop_conversion (const_tree exp) { tree outer_type, inner_type; if (!tree_nop_conversion (exp)) return false; outer_type = TREE_TYPE (exp); inner_type = TREE_TYPE (TREE_OPERAND (exp, 0)); return (TYPE_UNSIGNED (outer_type) == TYPE_UNSIGNED (inner_type) && POINTER_TYPE_P (outer_type) == POINTER_TYPE_P (inner_type)); } /* Strip conversions from EXP according to tree_nop_conversion and return the resulting expression. */ tree tree_strip_nop_conversions (tree exp) { while (tree_nop_conversion (exp)) exp = TREE_OPERAND (exp, 0); return exp; } /* Strip conversions from EXP according to tree_sign_nop_conversion and return the resulting expression. */ tree tree_strip_sign_nop_conversions (tree exp) { while (tree_sign_nop_conversion (exp)) exp = TREE_OPERAND (exp, 0); return exp; } /* Avoid any floating point extensions from EXP. */ tree strip_float_extensions (tree exp) { tree sub, expt, subt; /* For floating point constant look up the narrowest type that can hold it properly and handle it like (type)(narrowest_type)constant. This way we can optimize for instance a=a*2.0 where "a" is float but 2.0 is double constant. */ if (TREE_CODE (exp) == REAL_CST && !DECIMAL_FLOAT_TYPE_P (TREE_TYPE (exp))) { REAL_VALUE_TYPE orig; tree type = NULL; orig = TREE_REAL_CST (exp); if (TYPE_PRECISION (TREE_TYPE (exp)) > TYPE_PRECISION (float_type_node) && exact_real_truncate (TYPE_MODE (float_type_node), &orig)) type = float_type_node; else if (TYPE_PRECISION (TREE_TYPE (exp)) > TYPE_PRECISION (double_type_node) && exact_real_truncate (TYPE_MODE (double_type_node), &orig)) type = double_type_node; if (type) return build_real_truncate (type, orig); } if (!CONVERT_EXPR_P (exp)) return exp; sub = TREE_OPERAND (exp, 0); subt = TREE_TYPE (sub); expt = TREE_TYPE (exp); if (!FLOAT_TYPE_P (subt)) return exp; if (DECIMAL_FLOAT_TYPE_P (expt) != DECIMAL_FLOAT_TYPE_P (subt)) return exp; if (TYPE_PRECISION (subt) > TYPE_PRECISION (expt)) return exp; return strip_float_extensions (sub); } /* Strip out all handled components that produce invariant offsets. */ const_tree strip_invariant_refs (const_tree op) { while (handled_component_p (op)) { switch (TREE_CODE (op)) { case ARRAY_REF: case ARRAY_RANGE_REF: if (!is_gimple_constant (TREE_OPERAND (op, 1)) || TREE_OPERAND (op, 2) != NULL_TREE || TREE_OPERAND (op, 3) != NULL_TREE) return NULL; break; case COMPONENT_REF: if (TREE_OPERAND (op, 2) != NULL_TREE) return NULL; break; default:; } op = TREE_OPERAND (op, 0); } return op; } static GTY(()) tree gcc_eh_personality_decl; /* Return the GCC personality function decl. */ tree lhd_gcc_personality (void) { if (!gcc_eh_personality_decl) gcc_eh_personality_decl = build_personality_function ("gcc"); return gcc_eh_personality_decl; } /* TARGET is a call target of GIMPLE call statement (obtained by gimple_call_fn). Return true if it is OBJ_TYPE_REF representing an virtual call of C++ method. (As opposed to OBJ_TYPE_REF representing objc calls through a cast where middle-end devirtualization machinery can't apply.) FOR_DUMP_P is true when being called from the dump routines. */ bool virtual_method_call_p (const_tree target, bool for_dump_p) { if (TREE_CODE (target) != OBJ_TYPE_REF) return false; tree t = TREE_TYPE (target); gcc_checking_assert (TREE_CODE (t) == POINTER_TYPE); t = TREE_TYPE (t); if (TREE_CODE (t) == FUNCTION_TYPE) return false; gcc_checking_assert (TREE_CODE (t) == METHOD_TYPE); /* If we do not have BINFO associated, it means that type was built without devirtualization enabled. Do not consider this a virtual call. */ if (!TYPE_BINFO (obj_type_ref_class (target, for_dump_p))) return false; return true; } /* Lookup sub-BINFO of BINFO of TYPE at offset POS. */ static tree lookup_binfo_at_offset (tree binfo, tree type, HOST_WIDE_INT pos) { unsigned int i; tree base_binfo, b; for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++) if (pos == tree_to_shwi (BINFO_OFFSET (base_binfo)) && types_same_for_odr (TREE_TYPE (base_binfo), type)) return base_binfo; else if ((b = lookup_binfo_at_offset (base_binfo, type, pos)) != NULL) return b; return NULL; } /* Try to find a base info of BINFO that would have its field decl at offset OFFSET within the BINFO type and which is of EXPECTED_TYPE. If it can be found, return, otherwise return NULL_TREE. */ tree get_binfo_at_offset (tree binfo, poly_int64 offset, tree expected_type) { tree type = BINFO_TYPE (binfo); while (true) { HOST_WIDE_INT pos, size; tree fld; int i; if (types_same_for_odr (type, expected_type)) return binfo; if (maybe_lt (offset, 0)) return NULL_TREE; for (fld = TYPE_FIELDS (type); fld; fld = DECL_CHAIN (fld)) { if (TREE_CODE (fld) != FIELD_DECL || !DECL_ARTIFICIAL (fld)) continue; pos = int_bit_position (fld); size = tree_to_uhwi (DECL_SIZE (fld)); if (known_in_range_p (offset, pos, size)) break; } if (!fld || TREE_CODE (TREE_TYPE (fld)) != RECORD_TYPE) return NULL_TREE; /* Offset 0 indicates the primary base, whose vtable contents are represented in the binfo for the derived class. */ else if (maybe_ne (offset, 0)) { tree found_binfo = NULL, base_binfo; /* Offsets in BINFO are in bytes relative to the whole structure while POS is in bits relative to the containing field. */ int binfo_offset = (tree_to_shwi (BINFO_OFFSET (binfo)) + pos / BITS_PER_UNIT); for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++) if (tree_to_shwi (BINFO_OFFSET (base_binfo)) == binfo_offset && types_same_for_odr (TREE_TYPE (base_binfo), TREE_TYPE (fld))) { found_binfo = base_binfo; break; } if (found_binfo) binfo = found_binfo; else binfo = lookup_binfo_at_offset (binfo, TREE_TYPE (fld), binfo_offset); } type = TREE_TYPE (fld); offset -= pos; } } /* Returns true if X is a typedef decl. */ bool is_typedef_decl (const_tree x) { return (x && TREE_CODE (x) == TYPE_DECL && DECL_ORIGINAL_TYPE (x) != NULL_TREE); } /* Returns true iff TYPE is a type variant created for a typedef. */ bool typedef_variant_p (const_tree type) { return is_typedef_decl (TYPE_NAME (type)); } /* PR 84195: Replace control characters in "unescaped" with their escaped equivalents. Allow newlines if -fmessage-length has been set to a non-zero value. This is done here, rather than where the attribute is recorded as the message length can change between these two locations. */ void escaped_string::escape (const char *unescaped) { char *escaped; size_t i, new_i, len; if (m_owned) free (m_str); m_str = const_cast (unescaped); m_owned = false; if (unescaped == NULL || *unescaped == 0) return; len = strlen (unescaped); escaped = NULL; new_i = 0; for (i = 0; i < len; i++) { char c = unescaped[i]; if (!ISCNTRL (c)) { if (escaped) escaped[new_i++] = c; continue; } if (c != '\n' || !pp_is_wrapping_line (global_dc->printer)) { if (escaped == NULL) { /* We only allocate space for a new string if we actually encounter a control character that needs replacing. */ escaped = (char *) xmalloc (len * 2 + 1); strncpy (escaped, unescaped, i); new_i = i; } escaped[new_i++] = '\\'; switch (c) { case '\a': escaped[new_i++] = 'a'; break; case '\b': escaped[new_i++] = 'b'; break; case '\f': escaped[new_i++] = 'f'; break; case '\n': escaped[new_i++] = 'n'; break; case '\r': escaped[new_i++] = 'r'; break; case '\t': escaped[new_i++] = 't'; break; case '\v': escaped[new_i++] = 'v'; break; default: escaped[new_i++] = '?'; break; } } else if (escaped) escaped[new_i++] = c; } if (escaped) { escaped[new_i] = 0; m_str = escaped; m_owned = true; } } /* Warn about a use of an identifier which was marked deprecated. Returns whether a warning was given. */ bool warn_deprecated_use (tree node, tree attr) { escaped_string msg; if (node == 0 || !warn_deprecated_decl) return false; if (!attr) { if (DECL_P (node)) attr = DECL_ATTRIBUTES (node); else if (TYPE_P (node)) { tree decl = TYPE_STUB_DECL (node); if (decl) attr = lookup_attribute ("deprecated", TYPE_ATTRIBUTES (TREE_TYPE (decl))); } } if (attr) attr = lookup_attribute ("deprecated", attr); if (attr) msg.escape (TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr)))); bool w = false; if (DECL_P (node)) { auto_diagnostic_group d; if (msg) w = warning (OPT_Wdeprecated_declarations, "%qD is deprecated: %s", node, (const char *) msg); else w = warning (OPT_Wdeprecated_declarations, "%qD is deprecated", node); if (w) inform (DECL_SOURCE_LOCATION (node), "declared here"); } else if (TYPE_P (node)) { tree what = NULL_TREE; tree decl = TYPE_STUB_DECL (node); if (TYPE_NAME (node)) { if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE) what = TYPE_NAME (node); else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL && DECL_NAME (TYPE_NAME (node))) what = DECL_NAME (TYPE_NAME (node)); } auto_diagnostic_group d; if (what) { if (msg) w = warning (OPT_Wdeprecated_declarations, "%qE is deprecated: %s", what, (const char *) msg); else w = warning (OPT_Wdeprecated_declarations, "%qE is deprecated", what); } else { if (msg) w = warning (OPT_Wdeprecated_declarations, "type is deprecated: %s", (const char *) msg); else w = warning (OPT_Wdeprecated_declarations, "type is deprecated"); } if (w && decl) inform (DECL_SOURCE_LOCATION (decl), "declared here"); } return w; } /* Return true if REF has a COMPONENT_REF with a bit-field field declaration somewhere in it. */ bool contains_bitfld_component_ref_p (const_tree ref) { while (handled_component_p (ref)) { if (TREE_CODE (ref) == COMPONENT_REF && DECL_BIT_FIELD (TREE_OPERAND (ref, 1))) return true; ref = TREE_OPERAND (ref, 0); } return false; } /* Try to determine whether a TRY_CATCH expression can fall through. This is a subroutine of block_may_fallthru. */ static bool try_catch_may_fallthru (const_tree stmt) { tree_stmt_iterator i; /* If the TRY block can fall through, the whole TRY_CATCH can fall through. */ if (block_may_fallthru (TREE_OPERAND (stmt, 0))) return true; i = tsi_start (TREE_OPERAND (stmt, 1)); switch (TREE_CODE (tsi_stmt (i))) { case CATCH_EXPR: /* We expect to see a sequence of CATCH_EXPR trees, each with a catch expression and a body. The whole TRY_CATCH may fall through iff any of the catch bodies falls through. */ for (; !tsi_end_p (i); tsi_next (&i)) { if (block_may_fallthru (CATCH_BODY (tsi_stmt (i)))) return true; } return false; case EH_FILTER_EXPR: /* The exception filter expression only matters if there is an exception. If the exception does not match EH_FILTER_TYPES, we will execute EH_FILTER_FAILURE, and we will fall through if that falls through. If the exception does match EH_FILTER_TYPES, the stack unwinder will continue up the stack, so we will not fall through. We don't know whether we will throw an exception which matches EH_FILTER_TYPES or not, so we just ignore EH_FILTER_TYPES and assume that we might throw an exception which doesn't match. */ return block_may_fallthru (EH_FILTER_FAILURE (tsi_stmt (i))); default: /* This case represents statements to be executed when an exception occurs. Those statements are implicitly followed by a RESX statement to resume execution after the exception. So in this case the TRY_CATCH never falls through. */ return false; } } /* Try to determine if we can fall out of the bottom of BLOCK. This guess need not be 100% accurate; simply be conservative and return true if we don't know. This is used only to avoid stupidly generating extra code. If we're wrong, we'll just delete the extra code later. */ bool block_may_fallthru (const_tree block) { /* This CONST_CAST is okay because expr_last returns its argument unmodified and we assign it to a const_tree. */ const_tree stmt = expr_last (CONST_CAST_TREE (block)); switch (stmt ? TREE_CODE (stmt) : ERROR_MARK) { case GOTO_EXPR: case RETURN_EXPR: /* Easy cases. If the last statement of the block implies control transfer, then we can't fall through. */ return false; case SWITCH_EXPR: /* If there is a default: label or case labels cover all possible SWITCH_COND values, then the SWITCH_EXPR will transfer control to some case label in all cases and all we care is whether the SWITCH_BODY falls through. */ if (SWITCH_ALL_CASES_P (stmt)) return block_may_fallthru (SWITCH_BODY (stmt)); return true; case COND_EXPR: if (block_may_fallthru (COND_EXPR_THEN (stmt))) return true; return block_may_fallthru (COND_EXPR_ELSE (stmt)); case BIND_EXPR: return block_may_fallthru (BIND_EXPR_BODY (stmt)); case TRY_CATCH_EXPR: return try_catch_may_fallthru (stmt); case TRY_FINALLY_EXPR: /* The finally clause is always executed after the try clause, so if it does not fall through, then the try-finally will not fall through. Otherwise, if the try clause does not fall through, then when the finally clause falls through it will resume execution wherever the try clause was going. So the whole try-finally will only fall through if both the try clause and the finally clause fall through. */ return (block_may_fallthru (TREE_OPERAND (stmt, 0)) && block_may_fallthru (TREE_OPERAND (stmt, 1))); case EH_ELSE_EXPR: return block_may_fallthru (TREE_OPERAND (stmt, 0)); case MODIFY_EXPR: if (TREE_CODE (TREE_OPERAND (stmt, 1)) == CALL_EXPR) stmt = TREE_OPERAND (stmt, 1); else return true; /* FALLTHRU */ case CALL_EXPR: /* Functions that do not return do not fall through. */ return (call_expr_flags (stmt) & ECF_NORETURN) == 0; case CLEANUP_POINT_EXPR: return block_may_fallthru (TREE_OPERAND (stmt, 0)); case TARGET_EXPR: return block_may_fallthru (TREE_OPERAND (stmt, 1)); case ERROR_MARK: return true; default: return lang_hooks.block_may_fallthru (stmt); } } /* True if we are using EH to handle cleanups. */ static bool using_eh_for_cleanups_flag = false; /* This routine is called from front ends to indicate eh should be used for cleanups. */ void using_eh_for_cleanups (void) { using_eh_for_cleanups_flag = true; } /* Query whether EH is used for cleanups. */ bool using_eh_for_cleanups_p (void) { return using_eh_for_cleanups_flag; } /* Wrapper for tree_code_name to ensure that tree code is valid */ const char * get_tree_code_name (enum tree_code code) { const char *invalid = ""; /* The tree_code enum promotes to signed, but we could be getting invalid values, so force an unsigned comparison. */ if (unsigned (code) >= MAX_TREE_CODES) { if (code == 0xa5a5) return "ggc_freed"; return invalid; } return tree_code_name[code]; } /* Drops the TREE_OVERFLOW flag from T. */ tree drop_tree_overflow (tree t) { gcc_checking_assert (TREE_OVERFLOW (t)); /* For tree codes with a sharing machinery re-build the result. */ if (poly_int_tree_p (t)) return wide_int_to_tree (TREE_TYPE (t), wi::to_poly_wide (t)); /* For VECTOR_CST, remove the overflow bits from the encoded elements and canonicalize the result. */ if (TREE_CODE (t) == VECTOR_CST) { tree_vector_builder builder; builder.new_unary_operation (TREE_TYPE (t), t, true); unsigned int count = builder.encoded_nelts (); for (unsigned int i = 0; i < count; ++i) { tree elt = VECTOR_CST_ELT (t, i); if (TREE_OVERFLOW (elt)) elt = drop_tree_overflow (elt); builder.quick_push (elt); } return builder.build (); } /* Otherwise, as all tcc_constants are possibly shared, copy the node and drop the flag. */ t = copy_node (t); TREE_OVERFLOW (t) = 0; /* For constants that contain nested constants, drop the flag from those as well. */ if (TREE_CODE (t) == COMPLEX_CST) { if (TREE_OVERFLOW (TREE_REALPART (t))) TREE_REALPART (t) = drop_tree_overflow (TREE_REALPART (t)); if (TREE_OVERFLOW (TREE_IMAGPART (t))) TREE_IMAGPART (t) = drop_tree_overflow (TREE_IMAGPART (t)); } return t; } /* Given a memory reference expression T, return its base address. The base address of a memory reference expression is the main object being referenced. For instance, the base address for 'array[i].fld[j]' is 'array'. You can think of this as stripping away the offset part from a memory address. This function calls handled_component_p to strip away all the inner parts of the memory reference until it reaches the base object. */ tree get_base_address (tree t) { while (handled_component_p (t)) t = TREE_OPERAND (t, 0); if ((TREE_CODE (t) == MEM_REF || TREE_CODE (t) == TARGET_MEM_REF) && TREE_CODE (TREE_OPERAND (t, 0)) == ADDR_EXPR) t = TREE_OPERAND (TREE_OPERAND (t, 0), 0); /* ??? Either the alias oracle or all callers need to properly deal with WITH_SIZE_EXPRs before we can look through those. */ if (TREE_CODE (t) == WITH_SIZE_EXPR) return NULL_TREE; return t; } /* Return a tree of sizetype representing the size, in bytes, of the element of EXP, an ARRAY_REF or an ARRAY_RANGE_REF. */ tree array_ref_element_size (tree exp) { tree aligned_size = TREE_OPERAND (exp, 3); tree elmt_type = TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0))); location_t loc = EXPR_LOCATION (exp); /* If a size was specified in the ARRAY_REF, it's the size measured in alignment units of the element type. So multiply by that value. */ if (aligned_size) { /* ??? tree_ssa_useless_type_conversion will eliminate casts to sizetype from another type of the same width and signedness. */ if (TREE_TYPE (aligned_size) != sizetype) aligned_size = fold_convert_loc (loc, sizetype, aligned_size); return size_binop_loc (loc, MULT_EXPR, aligned_size, size_int (TYPE_ALIGN_UNIT (elmt_type))); } /* Otherwise, take the size from that of the element type. Substitute any PLACEHOLDER_EXPR that we have. */ else return SUBSTITUTE_PLACEHOLDER_IN_EXPR (TYPE_SIZE_UNIT (elmt_type), exp); } /* Return a tree representing the lower bound of the array mentioned in EXP, an ARRAY_REF or an ARRAY_RANGE_REF. */ tree array_ref_low_bound (tree exp) { tree domain_type = TYPE_DOMAIN (TREE_TYPE (TREE_OPERAND (exp, 0))); /* If a lower bound is specified in EXP, use it. */ if (TREE_OPERAND (exp, 2)) return TREE_OPERAND (exp, 2); /* Otherwise, if there is a domain type and it has a lower bound, use it, substituting for a PLACEHOLDER_EXPR as needed. */ if (domain_type && TYPE_MIN_VALUE (domain_type)) return SUBSTITUTE_PLACEHOLDER_IN_EXPR (TYPE_MIN_VALUE (domain_type), exp); /* Otherwise, return a zero of the appropriate type. */ tree idxtype = TREE_TYPE (TREE_OPERAND (exp, 1)); return (idxtype == error_mark_node ? integer_zero_node : build_int_cst (idxtype, 0)); } /* Return a tree representing the upper bound of the array mentioned in EXP, an ARRAY_REF or an ARRAY_RANGE_REF. */ tree array_ref_up_bound (tree exp) { tree domain_type = TYPE_DOMAIN (TREE_TYPE (TREE_OPERAND (exp, 0))); /* If there is a domain type and it has an upper bound, use it, substituting for a PLACEHOLDER_EXPR as needed. */ if (domain_type && TYPE_MAX_VALUE (domain_type)) return SUBSTITUTE_PLACEHOLDER_IN_EXPR (TYPE_MAX_VALUE (domain_type), exp); /* Otherwise fail. */ return NULL_TREE; } /* Returns true if REF is an array reference, component reference, or memory reference to an array at the end of a structure. If this is the case, the array may be allocated larger than its upper bound implies. */ bool array_at_struct_end_p (tree ref) { tree atype; if (TREE_CODE (ref) == ARRAY_REF || TREE_CODE (ref) == ARRAY_RANGE_REF) { atype = TREE_TYPE (TREE_OPERAND (ref, 0)); ref = TREE_OPERAND (ref, 0); } else if (TREE_CODE (ref) == COMPONENT_REF && TREE_CODE (TREE_TYPE (TREE_OPERAND (ref, 1))) == ARRAY_TYPE) atype = TREE_TYPE (TREE_OPERAND (ref, 1)); else if (TREE_CODE (ref) == MEM_REF) { tree arg = TREE_OPERAND (ref, 0); if (TREE_CODE (arg) == ADDR_EXPR) arg = TREE_OPERAND (arg, 0); tree argtype = TREE_TYPE (arg); if (TREE_CODE (argtype) == RECORD_TYPE) { if (tree fld = last_field (argtype)) { atype = TREE_TYPE (fld); if (TREE_CODE (atype) != ARRAY_TYPE) return false; if (VAR_P (arg) && DECL_SIZE (fld)) return false; } else return false; } else return false; } else return false; if (TREE_CODE (ref) == STRING_CST) return false; tree ref_to_array = ref; while (handled_component_p (ref)) { /* If the reference chain contains a component reference to a non-union type and there follows another field the reference is not at the end of a structure. */ if (TREE_CODE (ref) == COMPONENT_REF) { if (TREE_CODE (TREE_TYPE (TREE_OPERAND (ref, 0))) == RECORD_TYPE) { tree nextf = DECL_CHAIN (TREE_OPERAND (ref, 1)); while (nextf && TREE_CODE (nextf) != FIELD_DECL) nextf = DECL_CHAIN (nextf); if (nextf) return false; } } /* If we have a multi-dimensional array we do not consider a non-innermost dimension as flex array if the whole multi-dimensional array is at struct end. Same for an array of aggregates with a trailing array member. */ else if (TREE_CODE (ref) == ARRAY_REF) return false; else if (TREE_CODE (ref) == ARRAY_RANGE_REF) ; /* If we view an underlying object as sth else then what we gathered up to now is what we have to rely on. */ else if (TREE_CODE (ref) == VIEW_CONVERT_EXPR) break; else gcc_unreachable (); ref = TREE_OPERAND (ref, 0); } /* The array now is at struct end. Treat flexible arrays as always subject to extend, even into just padding constrained by an underlying decl. */ if (! TYPE_SIZE (atype) || ! TYPE_DOMAIN (atype) || ! TYPE_MAX_VALUE (TYPE_DOMAIN (atype))) return true; if (TREE_CODE (ref) == MEM_REF && TREE_CODE (TREE_OPERAND (ref, 0)) == ADDR_EXPR) ref = TREE_OPERAND (TREE_OPERAND (ref, 0), 0); /* If the reference is based on a declared entity, the size of the array is constrained by its given domain. (Do not trust commons PR/69368). */ if (DECL_P (ref) && !(flag_unconstrained_commons && VAR_P (ref) && DECL_COMMON (ref)) && DECL_SIZE_UNIT (ref) && TREE_CODE (DECL_SIZE_UNIT (ref)) == INTEGER_CST) { /* Check whether the array domain covers all of the available padding. */ poly_int64 offset; if (TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (atype))) != INTEGER_CST || TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (atype))) != INTEGER_CST || TREE_CODE (TYPE_MIN_VALUE (TYPE_DOMAIN (atype))) != INTEGER_CST) return true; if (! get_addr_base_and_unit_offset (ref_to_array, &offset)) return true; /* If at least one extra element fits it is a flexarray. */ if (known_le ((wi::to_offset (TYPE_MAX_VALUE (TYPE_DOMAIN (atype))) - wi::to_offset (TYPE_MIN_VALUE (TYPE_DOMAIN (atype))) + 2) * wi::to_offset (TYPE_SIZE_UNIT (TREE_TYPE (atype))), wi::to_offset (DECL_SIZE_UNIT (ref)) - offset)) return true; return false; } return true; } /* Return a tree representing the offset, in bytes, of the field referenced by EXP. This does not include any offset in DECL_FIELD_BIT_OFFSET. */ tree component_ref_field_offset (tree exp) { tree aligned_offset = TREE_OPERAND (exp, 2); tree field = TREE_OPERAND (exp, 1); location_t loc = EXPR_LOCATION (exp); /* If an offset was specified in the COMPONENT_REF, it's the offset measured in units of DECL_OFFSET_ALIGN / BITS_PER_UNIT. So multiply by that value. */ if (aligned_offset) { /* ??? tree_ssa_useless_type_conversion will eliminate casts to sizetype from another type of the same width and signedness. */ if (TREE_TYPE (aligned_offset) != sizetype) aligned_offset = fold_convert_loc (loc, sizetype, aligned_offset); return size_binop_loc (loc, MULT_EXPR, aligned_offset, size_int (DECL_OFFSET_ALIGN (field) / BITS_PER_UNIT)); } /* Otherwise, take the offset from that of the field. Substitute any PLACEHOLDER_EXPR that we have. */ else return SUBSTITUTE_PLACEHOLDER_IN_EXPR (DECL_FIELD_OFFSET (field), exp); } /* Given the initializer INIT, return the initializer for the field DECL if it exists, otherwise null. Used to obtain the initializer for a flexible array member and determine its size. */ static tree get_initializer_for (tree init, tree decl) { STRIP_NOPS (init); tree fld, fld_init; unsigned HOST_WIDE_INT i; FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (init), i, fld, fld_init) { if (decl == fld) return fld_init; if (TREE_CODE (fld) == CONSTRUCTOR) { fld_init = get_initializer_for (fld_init, decl); if (fld_init) return fld_init; } } return NULL_TREE; } /* Determines the size of the member referenced by the COMPONENT_REF REF, using its initializer expression if necessary in order to determine the size of an initialized flexible array member. If non-null, set *ARK when REF refers to an interior zero-length array or a trailing one-element array. Returns the size as sizetype (which might be zero for an object with an uninitialized flexible array member) or null if the size cannot be determined. */ tree component_ref_size (tree ref, special_array_member *sam /* = NULL */) { gcc_assert (TREE_CODE (ref) == COMPONENT_REF); special_array_member sambuf; if (!sam) sam = &sambuf; *sam = special_array_member::none; /* The object/argument referenced by the COMPONENT_REF and its type. */ tree arg = TREE_OPERAND (ref, 0); tree argtype = TREE_TYPE (arg); /* The referenced member. */ tree member = TREE_OPERAND (ref, 1); tree memsize = DECL_SIZE_UNIT (member); if (memsize) { tree memtype = TREE_TYPE (member); if (TREE_CODE (memtype) != ARRAY_TYPE) /* DECL_SIZE may be less than TYPE_SIZE in C++ when referring to the type of a class with a virtual base which doesn't reflect the size of the virtual's members (see pr97595). If that's the case fail for now and implement something more robust in the future. */ return (tree_int_cst_equal (memsize, TYPE_SIZE_UNIT (memtype)) ? memsize : NULL_TREE); bool trailing = array_at_struct_end_p (ref); bool zero_length = integer_zerop (memsize); if (!trailing && !zero_length) /* MEMBER is either an interior array or is an array with more than one element. */ return memsize; if (zero_length) { if (trailing) *sam = special_array_member::trail_0; else { *sam = special_array_member::int_0; memsize = NULL_TREE; } } if (!zero_length) if (tree dom = TYPE_DOMAIN (memtype)) if (tree min = TYPE_MIN_VALUE (dom)) if (tree max = TYPE_MAX_VALUE (dom)) if (TREE_CODE (min) == INTEGER_CST && TREE_CODE (max) == INTEGER_CST) { offset_int minidx = wi::to_offset (min); offset_int maxidx = wi::to_offset (max); offset_int neltsm1 = maxidx - minidx; if (neltsm1 > 0) /* MEMBER is an array with more than one element. */ return memsize; if (neltsm1 == 0) *sam = special_array_member::trail_1; } /* For a refernce to a zero- or one-element array member of a union use the size of the union instead of the size of the member. */ if (TREE_CODE (argtype) == UNION_TYPE) memsize = TYPE_SIZE_UNIT (argtype); } /* MEMBER is either a bona fide flexible array member, or a zero-length array member, or an array of length one treated as such. */ /* If the reference is to a declared object and the member a true flexible array, try to determine its size from its initializer. */ poly_int64 baseoff = 0; tree base = get_addr_base_and_unit_offset (ref, &baseoff); if (!base || !VAR_P (base)) { if (*sam != special_array_member::int_0) return NULL_TREE; if (TREE_CODE (arg) != COMPONENT_REF) return NULL_TREE; base = arg; while (TREE_CODE (base) == COMPONENT_REF) base = TREE_OPERAND (base, 0); baseoff = tree_to_poly_int64 (byte_position (TREE_OPERAND (ref, 1))); } /* BASE is the declared object of which MEMBER is either a member or that is cast to ARGTYPE (e.g., a char buffer used to store an ARGTYPE object). */ tree basetype = TREE_TYPE (base); /* Determine the base type of the referenced object. If it's the same as ARGTYPE and MEMBER has a known size, return it. */ tree bt = basetype; if (*sam != special_array_member::int_0) while (TREE_CODE (bt) == ARRAY_TYPE) bt = TREE_TYPE (bt); bool typematch = useless_type_conversion_p (argtype, bt); if (memsize && typematch) return memsize; memsize = NULL_TREE; if (typematch) /* MEMBER is a true flexible array member. Compute its size from the initializer of the BASE object if it has one. */ if (tree init = DECL_P (base) ? DECL_INITIAL (base) : NULL_TREE) if (init != error_mark_node) { init = get_initializer_for (init, member); if (init) { memsize = TYPE_SIZE_UNIT (TREE_TYPE (init)); if (tree refsize = TYPE_SIZE_UNIT (argtype)) { /* Use the larger of the initializer size and the tail padding in the enclosing struct. */ poly_int64 rsz = tree_to_poly_int64 (refsize); rsz -= baseoff; if (known_lt (tree_to_poly_int64 (memsize), rsz)) memsize = wide_int_to_tree (TREE_TYPE (memsize), rsz); } baseoff = 0; } } if (!memsize) { if (typematch) { if (DECL_P (base) && DECL_EXTERNAL (base) && bt == basetype && *sam != special_array_member::int_0) /* The size of a flexible array member of an extern struct with no initializer cannot be determined (it's defined in another translation unit and can have an initializer with an arbitrary number of elements). */ return NULL_TREE; /* Use the size of the base struct or, for interior zero-length arrays, the size of the enclosing type. */ memsize = TYPE_SIZE_UNIT (bt); } else if (DECL_P (base)) /* Use the size of the BASE object (possibly an array of some other type such as char used to store the struct). */ memsize = DECL_SIZE_UNIT (base); else return NULL_TREE; } /* If the flexible array member has a known size use the greater of it and the tail padding in the enclosing struct. Otherwise, when the size of the flexible array member is unknown and the referenced object is not a struct, use the size of its type when known. This detects sizes of array buffers when cast to struct types with flexible array members. */ if (memsize) { poly_int64 memsz64 = memsize ? tree_to_poly_int64 (memsize) : 0; if (known_lt (baseoff, memsz64)) { memsz64 -= baseoff; return wide_int_to_tree (TREE_TYPE (memsize), memsz64); } return size_zero_node; } /* Return "don't know" for an external non-array object since its flexible array member can be initialized to have any number of elements. Otherwise, return zero because the flexible array member has no elements. */ return (DECL_P (base) && DECL_EXTERNAL (base) && (!typematch || TREE_CODE (basetype) != ARRAY_TYPE) ? NULL_TREE : size_zero_node); } /* Return the machine mode of T. For vectors, returns the mode of the inner type. The main use case is to feed the result to HONOR_NANS, avoiding the BLKmode that a direct TYPE_MODE (T) might return. */ machine_mode element_mode (const_tree t) { if (!TYPE_P (t)) t = TREE_TYPE (t); if (VECTOR_TYPE_P (t) || TREE_CODE (t) == COMPLEX_TYPE) t = TREE_TYPE (t); return TYPE_MODE (t); } /* Vector types need to re-check the target flags each time we report the machine mode. We need to do this because attribute target can change the result of vector_mode_supported_p and have_regs_of_mode on a per-function basis. Thus the TYPE_MODE of a VECTOR_TYPE can change on a per-function basis. */ /* ??? Possibly a better solution is to run through all the types referenced by a function and re-compute the TYPE_MODE once, rather than make the TYPE_MODE macro call a function. */ machine_mode vector_type_mode (const_tree t) { machine_mode mode; gcc_assert (TREE_CODE (t) == VECTOR_TYPE); mode = t->type_common.mode; if (VECTOR_MODE_P (mode) && (!targetm.vector_mode_supported_p (mode) || !have_regs_of_mode[mode])) { scalar_int_mode innermode; /* For integers, try mapping it to a same-sized scalar mode. */ if (is_int_mode (TREE_TYPE (t)->type_common.mode, &innermode)) { poly_int64 size = (TYPE_VECTOR_SUBPARTS (t) * GET_MODE_BITSIZE (innermode)); scalar_int_mode mode; if (int_mode_for_size (size, 0).exists (&mode) && have_regs_of_mode[mode]) return mode; } return BLKmode; } return mode; } /* Return the size in bits of each element of vector type TYPE. */ unsigned int vector_element_bits (const_tree type) { gcc_checking_assert (VECTOR_TYPE_P (type)); if (VECTOR_BOOLEAN_TYPE_P (type)) { if (VECTOR_MODE_P (TYPE_MODE (type))) return vector_element_size (tree_to_poly_uint64 (TYPE_SIZE (type)), TYPE_VECTOR_SUBPARTS (type)); else return 1; } return tree_to_uhwi (TYPE_SIZE (TREE_TYPE (type))); } /* Calculate the size in bits of each element of vector type TYPE and return the result as a tree of type bitsizetype. */ tree vector_element_bits_tree (const_tree type) { gcc_checking_assert (VECTOR_TYPE_P (type)); if (VECTOR_BOOLEAN_TYPE_P (type)) return bitsize_int (vector_element_bits (type)); return TYPE_SIZE (TREE_TYPE (type)); } /* Verify that basic properties of T match TV and thus T can be a variant of TV. TV should be the more specified variant (i.e. the main variant). */ static bool verify_type_variant (const_tree t, tree tv) { /* Type variant can differ by: - TYPE_QUALS: TYPE_READONLY, TYPE_VOLATILE, TYPE_ATOMIC, TYPE_RESTRICT, ENCODE_QUAL_ADDR_SPACE. - main variant may be TYPE_COMPLETE_P and variant types !TYPE_COMPLETE_P in this case some values may not be set in the variant types (see TYPE_COMPLETE_P checks). - it is possible to have TYPE_ARTIFICIAL variant of non-artifical type - by TYPE_NAME and attributes (i.e. when variant originate by typedef) - TYPE_CANONICAL (TYPE_ALIAS_SET is the same among variants) - by the alignment: TYPE_ALIGN and TYPE_USER_ALIGN - during LTO by TYPE_CONTEXT if type is TYPE_FILE_SCOPE_P this is necessary to make it possible to merge types form different TUs - arrays, pointers and references may have TREE_TYPE that is a variant of TREE_TYPE of their main variants. - aggregates may have new TYPE_FIELDS list that list variants of the main variant TYPE_FIELDS. - vector types may differ by TYPE_VECTOR_OPAQUE */ /* Convenience macro for matching individual fields. */ #define verify_variant_match(flag) \ do { \ if (flag (tv) != flag (t)) \ { \ error ("type variant differs by %s", #flag); \ debug_tree (tv); \ return false; \ } \ } while (false) /* tree_base checks. */ verify_variant_match (TREE_CODE); /* FIXME: Ada builds non-artificial variants of artificial types. */ if (TYPE_ARTIFICIAL (tv) && 0) verify_variant_match (TYPE_ARTIFICIAL); if (POINTER_TYPE_P (tv)) verify_variant_match (TYPE_REF_CAN_ALIAS_ALL); /* FIXME: TYPE_SIZES_GIMPLIFIED may differs for Ada build. */ verify_variant_match (TYPE_UNSIGNED); verify_variant_match (TYPE_PACKED); if (TREE_CODE (t) == REFERENCE_TYPE) verify_variant_match (TYPE_REF_IS_RVALUE); if (AGGREGATE_TYPE_P (t)) verify_variant_match (TYPE_REVERSE_STORAGE_ORDER); else verify_variant_match (TYPE_SATURATING); /* FIXME: This check trigger during libstdc++ build. */ if (RECORD_OR_UNION_TYPE_P (t) && COMPLETE_TYPE_P (t) && 0) verify_variant_match (TYPE_FINAL_P); /* tree_type_common checks. */ if (COMPLETE_TYPE_P (t)) { verify_variant_match (TYPE_MODE); if (TREE_CODE (TYPE_SIZE (t)) != PLACEHOLDER_EXPR && TREE_CODE (TYPE_SIZE (tv)) != PLACEHOLDER_EXPR) verify_variant_match (TYPE_SIZE); if (TREE_CODE (TYPE_SIZE_UNIT (t)) != PLACEHOLDER_EXPR && TREE_CODE (TYPE_SIZE_UNIT (tv)) != PLACEHOLDER_EXPR && TYPE_SIZE_UNIT (t) != TYPE_SIZE_UNIT (tv)) { gcc_assert (!operand_equal_p (TYPE_SIZE_UNIT (t), TYPE_SIZE_UNIT (tv), 0)); error ("type variant has different %"); debug_tree (tv); error ("type variant%'s %"); debug_tree (TYPE_SIZE_UNIT (tv)); error ("type%'s %"); debug_tree (TYPE_SIZE_UNIT (t)); return false; } verify_variant_match (TYPE_NEEDS_CONSTRUCTING); } verify_variant_match (TYPE_PRECISION); if (RECORD_OR_UNION_TYPE_P (t)) verify_variant_match (TYPE_TRANSPARENT_AGGR); else if (TREE_CODE (t) == ARRAY_TYPE) verify_variant_match (TYPE_NONALIASED_COMPONENT); /* During LTO we merge variant lists from diferent translation units that may differ BY TYPE_CONTEXT that in turn may point to TRANSLATION_UNIT_DECL. Ada also builds variants of types with different TYPE_CONTEXT. */ if ((!in_lto_p || !TYPE_FILE_SCOPE_P (t)) && 0) verify_variant_match (TYPE_CONTEXT); if (TREE_CODE (t) == ARRAY_TYPE || TREE_CODE (t) == INTEGER_TYPE) verify_variant_match (TYPE_STRING_FLAG); if (TREE_CODE (t) == RECORD_TYPE || TREE_CODE (t) == UNION_TYPE) verify_variant_match (TYPE_CXX_ODR_P); if (TYPE_ALIAS_SET_KNOWN_P (t)) { error ("type variant with %"); debug_tree (tv); return false; } /* tree_type_non_common checks. */ /* FIXME: C FE uses TYPE_VFIELD to record C_TYPE_INCOMPLETE_VARS and dangle the pointer from time to time. */ if (RECORD_OR_UNION_TYPE_P (t) && TYPE_VFIELD (t) != TYPE_VFIELD (tv) && (in_lto_p || !TYPE_VFIELD (tv) || TREE_CODE (TYPE_VFIELD (tv)) != TREE_LIST)) { error ("type variant has different %"); debug_tree (tv); return false; } if ((TREE_CODE (t) == ENUMERAL_TYPE && COMPLETE_TYPE_P (t)) || TREE_CODE (t) == INTEGER_TYPE || TREE_CODE (t) == BOOLEAN_TYPE || TREE_CODE (t) == REAL_TYPE || TREE_CODE (t) == FIXED_POINT_TYPE) { verify_variant_match (TYPE_MAX_VALUE); verify_variant_match (TYPE_MIN_VALUE); } if (TREE_CODE (t) == METHOD_TYPE) verify_variant_match (TYPE_METHOD_BASETYPE); if (TREE_CODE (t) == OFFSET_TYPE) verify_variant_match (TYPE_OFFSET_BASETYPE); if (TREE_CODE (t) == ARRAY_TYPE) verify_variant_match (TYPE_ARRAY_MAX_SIZE); /* FIXME: Be lax and allow TYPE_BINFO to be missing in variant types or even type's main variant. This is needed to make bootstrap pass and the bug seems new in GCC 5. C++ FE should be updated to make this consistent and we should check that TYPE_BINFO is always NULL for !COMPLETE_TYPE_P and otherwise there is a match with main variant. Also disable the check for Java for now because of parser hack that builds first an dummy BINFO and then sometimes replace it by real BINFO in some of the copies. */ if (RECORD_OR_UNION_TYPE_P (t) && TYPE_BINFO (t) && TYPE_BINFO (tv) && TYPE_BINFO (t) != TYPE_BINFO (tv) /* FIXME: Java sometimes keep dump TYPE_BINFOs on variant types. Since there is no cheap way to tell C++/Java type w/o LTO, do checking at LTO time only. */ && (in_lto_p && odr_type_p (t))) { error ("type variant has different %"); debug_tree (tv); error ("type variant%'s %"); debug_tree (TYPE_BINFO (tv)); error ("type%'s %"); debug_tree (TYPE_BINFO (t)); return false; } /* Check various uses of TYPE_VALUES_RAW. */ if (TREE_CODE (t) == ENUMERAL_TYPE && TYPE_VALUES (t)) verify_variant_match (TYPE_VALUES); else if (TREE_CODE (t) == ARRAY_TYPE) verify_variant_match (TYPE_DOMAIN); /* Permit incomplete variants of complete type. While FEs may complete all variants, this does not happen for C++ templates in all cases. */ else if (RECORD_OR_UNION_TYPE_P (t) && COMPLETE_TYPE_P (t) && TYPE_FIELDS (t) != TYPE_FIELDS (tv)) { tree f1, f2; /* Fortran builds qualified variants as new records with items of qualified type. Verify that they looks same. */ for (f1 = TYPE_FIELDS (t), f2 = TYPE_FIELDS (tv); f1 && f2; f1 = TREE_CHAIN (f1), f2 = TREE_CHAIN (f2)) if (TREE_CODE (f1) != FIELD_DECL || TREE_CODE (f2) != FIELD_DECL || (TYPE_MAIN_VARIANT (TREE_TYPE (f1)) != TYPE_MAIN_VARIANT (TREE_TYPE (f2)) /* FIXME: gfc_nonrestricted_type builds all types as variants with exception of pointer types. It deeply copies the type which means that we may end up with a variant type referring non-variant pointer. We may change it to produce types as variants, too, like objc_get_protocol_qualified_type does. */ && !POINTER_TYPE_P (TREE_TYPE (f1))) || DECL_FIELD_OFFSET (f1) != DECL_FIELD_OFFSET (f2) || DECL_FIELD_BIT_OFFSET (f1) != DECL_FIELD_BIT_OFFSET (f2)) break; if (f1 || f2) { error ("type variant has different %"); debug_tree (tv); error ("first mismatch is field"); debug_tree (f1); error ("and field"); debug_tree (f2); return false; } } else if ((TREE_CODE (t) == FUNCTION_TYPE || TREE_CODE (t) == METHOD_TYPE)) verify_variant_match (TYPE_ARG_TYPES); /* For C++ the qualified variant of array type is really an array type of qualified TREE_TYPE. objc builds variants of pointer where pointer to type is a variant, too in objc_get_protocol_qualified_type. */ if (TREE_TYPE (t) != TREE_TYPE (tv) && ((TREE_CODE (t) != ARRAY_TYPE && !POINTER_TYPE_P (t)) || TYPE_MAIN_VARIANT (TREE_TYPE (t)) != TYPE_MAIN_VARIANT (TREE_TYPE (tv)))) { error ("type variant has different %"); debug_tree (tv); error ("type variant%'s %"); debug_tree (TREE_TYPE (tv)); error ("type%'s %"); debug_tree (TREE_TYPE (t)); return false; } if (type_with_alias_set_p (t) && !gimple_canonical_types_compatible_p (t, tv, false)) { error ("type is not compatible with its variant"); debug_tree (tv); error ("type variant%'s %"); debug_tree (TREE_TYPE (tv)); error ("type%'s %"); debug_tree (TREE_TYPE (t)); return false; } return true; #undef verify_variant_match } /* The TYPE_CANONICAL merging machinery. It should closely resemble the middle-end types_compatible_p function. It needs to avoid claiming types are different for types that should be treated the same with respect to TBAA. Canonical types are also used for IL consistency checks via the useless_type_conversion_p predicate which does not handle all type kinds itself but falls back to pointer-comparison of TYPE_CANONICAL for aggregates for example. */ /* Return true if TYPE_UNSIGNED of TYPE should be ignored for canonical type calculation because we need to allow inter-operability between signed and unsigned variants. */ bool type_with_interoperable_signedness (const_tree type) { /* Fortran standard require C_SIGNED_CHAR to be interoperable with both signed char and unsigned char. Similarly fortran FE builds C_SIZE_T as signed type, while C defines it unsigned. */ return tree_code_for_canonical_type_merging (TREE_CODE (type)) == INTEGER_TYPE && (TYPE_PRECISION (type) == TYPE_PRECISION (signed_char_type_node) || TYPE_PRECISION (type) == TYPE_PRECISION (size_type_node)); } /* Return true iff T1 and T2 are structurally identical for what TBAA is concerned. This function is used both by lto.c canonical type merging and by the verifier. If TRUST_TYPE_CANONICAL we do not look into structure of types that have TYPE_CANONICAL defined and assume them equivalent. This is useful only for LTO because only in these cases TYPE_CANONICAL equivalence correspond to one defined by gimple_canonical_types_compatible_p. */ bool gimple_canonical_types_compatible_p (const_tree t1, const_tree t2, bool trust_type_canonical) { /* Type variants should be same as the main variant. When not doing sanity checking to verify this fact, go to main variants and save some work. */ if (trust_type_canonical) { t1 = TYPE_MAIN_VARIANT (t1); t2 = TYPE_MAIN_VARIANT (t2); } /* Check first for the obvious case of pointer identity. */ if (t1 == t2) return true; /* Check that we have two types to compare. */ if (t1 == NULL_TREE || t2 == NULL_TREE) return false; /* We consider complete types always compatible with incomplete type. This does not make sense for canonical type calculation and thus we need to ensure that we are never called on it. FIXME: For more correctness the function probably should have three modes 1) mode assuming that types are complete mathcing their structure 2) mode allowing incomplete types but producing equivalence classes and thus ignoring all info from complete types 3) mode allowing incomplete types to match complete but checking compatibility between complete types. 1 and 2 can be used for canonical type calculation. 3 is the real definition of type compatibility that can be used i.e. for warnings during declaration merging. */ gcc_assert (!trust_type_canonical || (type_with_alias_set_p (t1) && type_with_alias_set_p (t2))); /* If the types have been previously registered and found equal they still are. */ if (TYPE_CANONICAL (t1) && TYPE_CANONICAL (t2) && trust_type_canonical) { /* Do not use TYPE_CANONICAL of pointer types. For LTO streamed types they are always NULL, but they are set to non-NULL for types constructed by build_pointer_type and variants. In this case the TYPE_CANONICAL is more fine grained than the equivalnce we test (where all pointers are considered equal. Be sure to not return false negatives. */ gcc_checking_assert (canonical_type_used_p (t1) && canonical_type_used_p (t2)); return TYPE_CANONICAL (t1) == TYPE_CANONICAL (t2); } /* For types where we do ODR based TBAA the canonical type is always set correctly, so we know that types are different if their canonical types does not match. */ if (trust_type_canonical && (odr_type_p (t1) && odr_based_tbaa_p (t1)) != (odr_type_p (t2) && odr_based_tbaa_p (t2))) return false; /* Can't be the same type if the types don't have the same code. */ enum tree_code code = tree_code_for_canonical_type_merging (TREE_CODE (t1)); if (code != tree_code_for_canonical_type_merging (TREE_CODE (t2))) return false; /* Qualifiers do not matter for canonical type comparison purposes. */ /* Void types and nullptr types are always the same. */ if (TREE_CODE (t1) == VOID_TYPE || TREE_CODE (t1) == NULLPTR_TYPE) return true; /* Can't be the same type if they have different mode. */ if (TYPE_MODE (t1) != TYPE_MODE (t2)) return false; /* Non-aggregate types can be handled cheaply. */ if (INTEGRAL_TYPE_P (t1) || SCALAR_FLOAT_TYPE_P (t1) || FIXED_POINT_TYPE_P (t1) || TREE_CODE (t1) == VECTOR_TYPE || TREE_CODE (t1) == COMPLEX_TYPE || TREE_CODE (t1) == OFFSET_TYPE || POINTER_TYPE_P (t1)) { /* Can't be the same type if they have different recision. */ if (TYPE_PRECISION (t1) != TYPE_PRECISION (t2)) return false; /* In some cases the signed and unsigned types are required to be inter-operable. */ if (TYPE_UNSIGNED (t1) != TYPE_UNSIGNED (t2) && !type_with_interoperable_signedness (t1)) return false; /* Fortran's C_SIGNED_CHAR is !TYPE_STRING_FLAG but needs to be interoperable with "signed char". Unless all frontends are revisited to agree on these types, we must ignore the flag completely. */ /* Fortran standard define C_PTR type that is compatible with every C pointer. For this reason we need to glob all pointers into one. Still pointers in different address spaces are not compatible. */ if (POINTER_TYPE_P (t1)) { if (TYPE_ADDR_SPACE (TREE_TYPE (t1)) != TYPE_ADDR_SPACE (TREE_TYPE (t2))) return false; } /* Tail-recurse to components. */ if (TREE_CODE (t1) == VECTOR_TYPE || TREE_CODE (t1) == COMPLEX_TYPE) return gimple_canonical_types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2), trust_type_canonical); return true; } /* Do type-specific comparisons. */ switch (TREE_CODE (t1)) { case ARRAY_TYPE: /* Array types are the same if the element types are the same and the number of elements are the same. */ if (!gimple_canonical_types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2), trust_type_canonical) || TYPE_STRING_FLAG (t1) != TYPE_STRING_FLAG (t2) || TYPE_REVERSE_STORAGE_ORDER (t1) != TYPE_REVERSE_STORAGE_ORDER (t2) || TYPE_NONALIASED_COMPONENT (t1) != TYPE_NONALIASED_COMPONENT (t2)) return false; else { tree i1 = TYPE_DOMAIN (t1); tree i2 = TYPE_DOMAIN (t2); /* For an incomplete external array, the type domain can be NULL_TREE. Check this condition also. */ if (i1 == NULL_TREE && i2 == NULL_TREE) return true; else if (i1 == NULL_TREE || i2 == NULL_TREE) return false; else { tree min1 = TYPE_MIN_VALUE (i1); tree min2 = TYPE_MIN_VALUE (i2); tree max1 = TYPE_MAX_VALUE (i1); tree max2 = TYPE_MAX_VALUE (i2); /* The minimum/maximum values have to be the same. */ if ((min1 == min2 || (min1 && min2 && ((TREE_CODE (min1) == PLACEHOLDER_EXPR && TREE_CODE (min2) == PLACEHOLDER_EXPR) || operand_equal_p (min1, min2, 0)))) && (max1 == max2 || (max1 && max2 && ((TREE_CODE (max1) == PLACEHOLDER_EXPR && TREE_CODE (max2) == PLACEHOLDER_EXPR) || operand_equal_p (max1, max2, 0))))) return true; else return false; } } case METHOD_TYPE: case FUNCTION_TYPE: /* Function types are the same if the return type and arguments types are the same. */ if (!gimple_canonical_types_compatible_p (TREE_TYPE (t1), TREE_TYPE (t2), trust_type_canonical)) return false; if (TYPE_ARG_TYPES (t1) == TYPE_ARG_TYPES (t2)) return true; else { tree parms1, parms2; for (parms1 = TYPE_ARG_TYPES (t1), parms2 = TYPE_ARG_TYPES (t2); parms1 && parms2; parms1 = TREE_CHAIN (parms1), parms2 = TREE_CHAIN (parms2)) { if (!gimple_canonical_types_compatible_p (TREE_VALUE (parms1), TREE_VALUE (parms2), trust_type_canonical)) return false; } if (parms1 || parms2) return false; return true; } case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: { tree f1, f2; /* Don't try to compare variants of an incomplete type, before TYPE_FIELDS has been copied around. */ if (!COMPLETE_TYPE_P (t1) && !COMPLETE_TYPE_P (t2)) return true; if (TYPE_REVERSE_STORAGE_ORDER (t1) != TYPE_REVERSE_STORAGE_ORDER (t2)) return false; /* For aggregate types, all the fields must be the same. */ for (f1 = TYPE_FIELDS (t1), f2 = TYPE_FIELDS (t2); f1 || f2; f1 = TREE_CHAIN (f1), f2 = TREE_CHAIN (f2)) { /* Skip non-fields and zero-sized fields. */ while (f1 && (TREE_CODE (f1) != FIELD_DECL || (DECL_SIZE (f1) && integer_zerop (DECL_SIZE (f1))))) f1 = TREE_CHAIN (f1); while (f2 && (TREE_CODE (f2) != FIELD_DECL || (DECL_SIZE (f2) && integer_zerop (DECL_SIZE (f2))))) f2 = TREE_CHAIN (f2); if (!f1 || !f2) break; /* The fields must have the same name, offset and type. */ if (DECL_NONADDRESSABLE_P (f1) != DECL_NONADDRESSABLE_P (f2) || !gimple_compare_field_offset (f1, f2) || !gimple_canonical_types_compatible_p (TREE_TYPE (f1), TREE_TYPE (f2), trust_type_canonical)) return false; } /* If one aggregate has more fields than the other, they are not the same. */ if (f1 || f2) return false; return true; } default: /* Consider all types with language specific trees in them mutually compatible. This is executed only from verify_type and false positives can be tolerated. */ gcc_assert (!in_lto_p); return true; } } /* Verify type T. */ void verify_type (const_tree t) { bool error_found = false; tree mv = TYPE_MAIN_VARIANT (t); if (!mv) { error ("main variant is not defined"); error_found = true; } else if (mv != TYPE_MAIN_VARIANT (mv)) { error ("% has different %"); debug_tree (mv); error_found = true; } else if (t != mv && !verify_type_variant (t, mv)) error_found = true; tree ct = TYPE_CANONICAL (t); if (!ct) ; else if (TYPE_CANONICAL (t) != ct) { error ("% has different %"); debug_tree (ct); error_found = true; } /* Method and function types cannot be used to address memory and thus TYPE_CANONICAL really matters only for determining useless conversions. FIXME: C++ FE produce declarations of builtin functions that are not compatible with main variants. */ else if (TREE_CODE (t) == FUNCTION_TYPE) ; else if (t != ct /* FIXME: gimple_canonical_types_compatible_p cannot compare types with variably sized arrays because their sizes possibly gimplified to different variables. */ && !variably_modified_type_p (ct, NULL) && !gimple_canonical_types_compatible_p (t, ct, false) && COMPLETE_TYPE_P (t)) { error ("% is not compatible"); debug_tree (ct); error_found = true; } if (COMPLETE_TYPE_P (t) && TYPE_CANONICAL (t) && TYPE_MODE (t) != TYPE_MODE (TYPE_CANONICAL (t))) { error ("% of % is not compatible"); debug_tree (ct); error_found = true; } if (TYPE_MAIN_VARIANT (t) == t && ct && TYPE_MAIN_VARIANT (ct) != ct) { error ("% of main variant is not main variant"); debug_tree (ct); debug_tree (TYPE_MAIN_VARIANT (ct)); error_found = true; } /* Check various uses of TYPE_MIN_VALUE_RAW. */ if (RECORD_OR_UNION_TYPE_P (t)) { /* FIXME: C FE uses TYPE_VFIELD to record C_TYPE_INCOMPLETE_VARS and danagle the pointer from time to time. */ if (TYPE_VFIELD (t) && TREE_CODE (TYPE_VFIELD (t)) != FIELD_DECL && TREE_CODE (TYPE_VFIELD (t)) != TREE_LIST) { error ("% is not % nor %"); debug_tree (TYPE_VFIELD (t)); error_found = true; } } else if (TREE_CODE (t) == POINTER_TYPE) { if (TYPE_NEXT_PTR_TO (t) && TREE_CODE (TYPE_NEXT_PTR_TO (t)) != POINTER_TYPE) { error ("% is not %"); debug_tree (TYPE_NEXT_PTR_TO (t)); error_found = true; } } else if (TREE_CODE (t) == REFERENCE_TYPE) { if (TYPE_NEXT_REF_TO (t) && TREE_CODE (TYPE_NEXT_REF_TO (t)) != REFERENCE_TYPE) { error ("% is not %"); debug_tree (TYPE_NEXT_REF_TO (t)); error_found = true; } } else if (INTEGRAL_TYPE_P (t) || TREE_CODE (t) == REAL_TYPE || TREE_CODE (t) == FIXED_POINT_TYPE) { /* FIXME: The following check should pass: useless_type_conversion_p (const_cast (t), TREE_TYPE (TYPE_MIN_VALUE (t)) but does not for C sizetypes in LTO. */ } /* Check various uses of TYPE_MAXVAL_RAW. */ if (RECORD_OR_UNION_TYPE_P (t)) { if (!TYPE_BINFO (t)) ; else if (TREE_CODE (TYPE_BINFO (t)) != TREE_BINFO) { error ("% is not %"); debug_tree (TYPE_BINFO (t)); error_found = true; } else if (TREE_TYPE (TYPE_BINFO (t)) != TYPE_MAIN_VARIANT (t)) { error ("% type is not %"); debug_tree (TREE_TYPE (TYPE_BINFO (t))); error_found = true; } } else if (TREE_CODE (t) == FUNCTION_TYPE || TREE_CODE (t) == METHOD_TYPE) { if (TYPE_METHOD_BASETYPE (t) && TREE_CODE (TYPE_METHOD_BASETYPE (t)) != RECORD_TYPE && TREE_CODE (TYPE_METHOD_BASETYPE (t)) != UNION_TYPE) { error ("% is not record nor union"); debug_tree (TYPE_METHOD_BASETYPE (t)); error_found = true; } } else if (TREE_CODE (t) == OFFSET_TYPE) { if (TYPE_OFFSET_BASETYPE (t) && TREE_CODE (TYPE_OFFSET_BASETYPE (t)) != RECORD_TYPE && TREE_CODE (TYPE_OFFSET_BASETYPE (t)) != UNION_TYPE) { error ("% is not record nor union"); debug_tree (TYPE_OFFSET_BASETYPE (t)); error_found = true; } } else if (INTEGRAL_TYPE_P (t) || TREE_CODE (t) == REAL_TYPE || TREE_CODE (t) == FIXED_POINT_TYPE) { /* FIXME: The following check should pass: useless_type_conversion_p (const_cast (t), TREE_TYPE (TYPE_MAX_VALUE (t)) but does not for C sizetypes in LTO. */ } else if (TREE_CODE (t) == ARRAY_TYPE) { if (TYPE_ARRAY_MAX_SIZE (t) && TREE_CODE (TYPE_ARRAY_MAX_SIZE (t)) != INTEGER_CST) { error ("% not %"); debug_tree (TYPE_ARRAY_MAX_SIZE (t)); error_found = true; } } else if (TYPE_MAX_VALUE_RAW (t)) { error ("% non-NULL"); debug_tree (TYPE_MAX_VALUE_RAW (t)); error_found = true; } if (TYPE_LANG_SLOT_1 (t) && in_lto_p) { error ("% field is non-NULL"); debug_tree (TYPE_LANG_SLOT_1 (t)); error_found = true; } /* Check various uses of TYPE_VALUES_RAW. */ if (TREE_CODE (t) == ENUMERAL_TYPE) for (tree l = TYPE_VALUES (t); l; l = TREE_CHAIN (l)) { tree value = TREE_VALUE (l); tree name = TREE_PURPOSE (l); /* C FE porduce INTEGER_CST of INTEGER_TYPE, while C++ FE uses CONST_DECL of ENUMERAL TYPE. */ if (TREE_CODE (value) != INTEGER_CST && TREE_CODE (value) != CONST_DECL) { error ("enum value is not % or %"); debug_tree (value); debug_tree (name); error_found = true; } if (TREE_CODE (TREE_TYPE (value)) != INTEGER_TYPE && !useless_type_conversion_p (const_cast (t), TREE_TYPE (value))) { error ("enum value type is not % nor convertible " "to the enum"); debug_tree (value); debug_tree (name); error_found = true; } if (TREE_CODE (name) != IDENTIFIER_NODE) { error ("enum value name is not %"); debug_tree (value); debug_tree (name); error_found = true; } } else if (TREE_CODE (t) == ARRAY_TYPE) { if (TYPE_DOMAIN (t) && TREE_CODE (TYPE_DOMAIN (t)) != INTEGER_TYPE) { error ("array % is not integer type"); debug_tree (TYPE_DOMAIN (t)); error_found = true; } } else if (RECORD_OR_UNION_TYPE_P (t)) { if (TYPE_FIELDS (t) && !COMPLETE_TYPE_P (t) && in_lto_p) { error ("% defined in incomplete type"); error_found = true; } for (tree fld = TYPE_FIELDS (t); fld; fld = TREE_CHAIN (fld)) { /* TODO: verify properties of decls. */ if (TREE_CODE (fld) == FIELD_DECL) ; else if (TREE_CODE (fld) == TYPE_DECL) ; else if (TREE_CODE (fld) == CONST_DECL) ; else if (VAR_P (fld)) ; else if (TREE_CODE (fld) == TEMPLATE_DECL) ; else if (TREE_CODE (fld) == USING_DECL) ; else if (TREE_CODE (fld) == FUNCTION_DECL) ; else { error ("wrong tree in % list"); debug_tree (fld); error_found = true; } } } else if (TREE_CODE (t) == INTEGER_TYPE || TREE_CODE (t) == BOOLEAN_TYPE || TREE_CODE (t) == OFFSET_TYPE || TREE_CODE (t) == REFERENCE_TYPE || TREE_CODE (t) == NULLPTR_TYPE || TREE_CODE (t) == POINTER_TYPE) { if (TYPE_CACHED_VALUES_P (t) != (TYPE_CACHED_VALUES (t) != NULL)) { error ("% is %i while % " "is %p", TYPE_CACHED_VALUES_P (t), (void *)TYPE_CACHED_VALUES (t)); error_found = true; } else if (TYPE_CACHED_VALUES_P (t) && TREE_CODE (TYPE_CACHED_VALUES (t)) != TREE_VEC) { error ("% is not %"); debug_tree (TYPE_CACHED_VALUES (t)); error_found = true; } /* Verify just enough of cache to ensure that no one copied it to new type. All copying should go by copy_node that should clear it. */ else if (TYPE_CACHED_VALUES_P (t)) { int i; for (i = 0; i < TREE_VEC_LENGTH (TYPE_CACHED_VALUES (t)); i++) if (TREE_VEC_ELT (TYPE_CACHED_VALUES (t), i) && TREE_TYPE (TREE_VEC_ELT (TYPE_CACHED_VALUES (t), i)) != t) { error ("wrong % entry"); debug_tree (TREE_VEC_ELT (TYPE_CACHED_VALUES (t), i)); error_found = true; break; } } } else if (TREE_CODE (t) == FUNCTION_TYPE || TREE_CODE (t) == METHOD_TYPE) for (tree l = TYPE_ARG_TYPES (t); l; l = TREE_CHAIN (l)) { /* C++ FE uses TREE_PURPOSE to store initial values. */ if (TREE_PURPOSE (l) && in_lto_p) { error ("% is non-NULL in % list"); debug_tree (l); error_found = true; } if (!TYPE_P (TREE_VALUE (l))) { error ("wrong entry in % list"); debug_tree (l); error_found = true; } } else if (!is_lang_specific (t) && TYPE_VALUES_RAW (t)) { error ("% field is non-NULL"); debug_tree (TYPE_VALUES_RAW (t)); error_found = true; } if (TREE_CODE (t) != INTEGER_TYPE && TREE_CODE (t) != BOOLEAN_TYPE && TREE_CODE (t) != OFFSET_TYPE && TREE_CODE (t) != REFERENCE_TYPE && TREE_CODE (t) != NULLPTR_TYPE && TREE_CODE (t) != POINTER_TYPE && TYPE_CACHED_VALUES_P (t)) { error ("% is set while it should not be"); error_found = true; } /* ipa-devirt makes an assumption that TYPE_METHOD_BASETYPE is always TYPE_MAIN_VARIANT and it would be odd to add methods only to variatns of a type. */ if (TREE_CODE (t) == METHOD_TYPE && TYPE_MAIN_VARIANT (TYPE_METHOD_BASETYPE (t)) != TYPE_METHOD_BASETYPE (t)) { error ("% is not main variant"); error_found = true; } if (error_found) { debug_tree (const_cast (t)); internal_error ("%qs failed", __func__); } } /* Return 1 if ARG interpreted as signed in its precision is known to be always positive or 2 if ARG is known to be always negative, or 3 if ARG may be positive or negative. */ int get_range_pos_neg (tree arg) { if (arg == error_mark_node) return 3; int prec = TYPE_PRECISION (TREE_TYPE (arg)); int cnt = 0; if (TREE_CODE (arg) == INTEGER_CST) { wide_int w = wi::sext (wi::to_wide (arg), prec); if (wi::neg_p (w)) return 2; else return 1; } while (CONVERT_EXPR_P (arg) && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (arg, 0))) && TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (arg, 0))) <= prec) { arg = TREE_OPERAND (arg, 0); /* Narrower value zero extended into wider type will always result in positive values. */ if (TYPE_UNSIGNED (TREE_TYPE (arg)) && TYPE_PRECISION (TREE_TYPE (arg)) < prec) return 1; prec = TYPE_PRECISION (TREE_TYPE (arg)); if (++cnt > 30) return 3; } if (TREE_CODE (arg) != SSA_NAME) return 3; wide_int arg_min, arg_max; while (get_range_info (arg, &arg_min, &arg_max) != VR_RANGE) { gimple *g = SSA_NAME_DEF_STMT (arg); if (is_gimple_assign (g) && CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (g))) { tree t = gimple_assign_rhs1 (g); if (INTEGRAL_TYPE_P (TREE_TYPE (t)) && TYPE_PRECISION (TREE_TYPE (t)) <= prec) { if (TYPE_UNSIGNED (TREE_TYPE (t)) && TYPE_PRECISION (TREE_TYPE (t)) < prec) return 1; prec = TYPE_PRECISION (TREE_TYPE (t)); arg = t; if (++cnt > 30) return 3; continue; } } return 3; } if (TYPE_UNSIGNED (TREE_TYPE (arg))) { /* For unsigned values, the "positive" range comes below the "negative" range. */ if (!wi::neg_p (wi::sext (arg_max, prec), SIGNED)) return 1; if (wi::neg_p (wi::sext (arg_min, prec), SIGNED)) return 2; } else { if (!wi::neg_p (wi::sext (arg_min, prec), SIGNED)) return 1; if (wi::neg_p (wi::sext (arg_max, prec), SIGNED)) return 2; } return 3; } /* Return true if ARG is marked with the nonnull attribute in the current function signature. */ bool nonnull_arg_p (const_tree arg) { tree t, attrs, fntype; unsigned HOST_WIDE_INT arg_num; gcc_assert (TREE_CODE (arg) == PARM_DECL && (POINTER_TYPE_P (TREE_TYPE (arg)) || TREE_CODE (TREE_TYPE (arg)) == OFFSET_TYPE)); /* The static chain decl is always non null. */ if (arg == cfun->static_chain_decl) return true; /* THIS argument of method is always non-NULL. */ if (TREE_CODE (TREE_TYPE (cfun->decl)) == METHOD_TYPE && arg == DECL_ARGUMENTS (cfun->decl) && flag_delete_null_pointer_checks) return true; /* Values passed by reference are always non-NULL. */ if (TREE_CODE (TREE_TYPE (arg)) == REFERENCE_TYPE && flag_delete_null_pointer_checks) return true; fntype = TREE_TYPE (cfun->decl); for (attrs = TYPE_ATTRIBUTES (fntype); attrs; attrs = TREE_CHAIN (attrs)) { attrs = lookup_attribute ("nonnull", attrs); /* If "nonnull" wasn't specified, we know nothing about the argument. */ if (attrs == NULL_TREE) return false; /* If "nonnull" applies to all the arguments, then ARG is non-null. */ if (TREE_VALUE (attrs) == NULL_TREE) return true; /* Get the position number for ARG in the function signature. */ for (arg_num = 1, t = DECL_ARGUMENTS (cfun->decl); t; t = DECL_CHAIN (t), arg_num++) { if (t == arg) break; } gcc_assert (t == arg); /* Now see if ARG_NUM is mentioned in the nonnull list. */ for (t = TREE_VALUE (attrs); t; t = TREE_CHAIN (t)) { if (compare_tree_int (TREE_VALUE (t), arg_num) == 0) return true; } } return false; } /* Combine LOC and BLOCK to a combined adhoc loc, retaining any range information. */ location_t set_block (location_t loc, tree block) { location_t pure_loc = get_pure_location (loc); source_range src_range = get_range_from_loc (line_table, loc); return COMBINE_LOCATION_DATA (line_table, pure_loc, src_range, block); } location_t set_source_range (tree expr, location_t start, location_t finish) { source_range src_range; src_range.m_start = start; src_range.m_finish = finish; return set_source_range (expr, src_range); } location_t set_source_range (tree expr, source_range src_range) { if (!EXPR_P (expr)) return UNKNOWN_LOCATION; location_t pure_loc = get_pure_location (EXPR_LOCATION (expr)); location_t adhoc = COMBINE_LOCATION_DATA (line_table, pure_loc, src_range, NULL); SET_EXPR_LOCATION (expr, adhoc); return adhoc; } /* Return EXPR, potentially wrapped with a node expression LOC, if !CAN_HAVE_LOCATION_P (expr). NON_LVALUE_EXPR is used for wrapping constants, apart from STRING_CST. VIEW_CONVERT_EXPR is used for wrapping non-constants and STRING_CST. Wrapper nodes can be identified using location_wrapper_p. */ tree maybe_wrap_with_location (tree expr, location_t loc) { if (expr == NULL) return NULL; if (loc == UNKNOWN_LOCATION) return expr; if (CAN_HAVE_LOCATION_P (expr)) return expr; /* We should only be adding wrappers for constants and for decls, or for some exceptional tree nodes (e.g. BASELINK in the C++ FE). */ gcc_assert (CONSTANT_CLASS_P (expr) || DECL_P (expr) || EXCEPTIONAL_CLASS_P (expr)); /* For now, don't add wrappers to exceptional tree nodes, to minimize any impact of the wrapper nodes. */ if (EXCEPTIONAL_CLASS_P (expr)) return expr; /* Compiler-generated temporary variables don't need a wrapper. */ if (DECL_P (expr) && DECL_ARTIFICIAL (expr) && DECL_IGNORED_P (expr)) return expr; /* If any auto_suppress_location_wrappers are active, don't create wrappers. */ if (suppress_location_wrappers > 0) return expr; tree_code code = (((CONSTANT_CLASS_P (expr) && TREE_CODE (expr) != STRING_CST) || (TREE_CODE (expr) == CONST_DECL && !TREE_STATIC (expr))) ? NON_LVALUE_EXPR : VIEW_CONVERT_EXPR); tree wrapper = build1_loc (loc, code, TREE_TYPE (expr), expr); /* Mark this node as being a wrapper. */ EXPR_LOCATION_WRAPPER_P (wrapper) = 1; return wrapper; } int suppress_location_wrappers; /* Return the name of combined function FN, for debugging purposes. */ const char * combined_fn_name (combined_fn fn) { if (builtin_fn_p (fn)) { tree fndecl = builtin_decl_explicit (as_builtin_fn (fn)); return IDENTIFIER_POINTER (DECL_NAME (fndecl)); } else return internal_fn_name (as_internal_fn (fn)); } /* Return a bitmap with a bit set corresponding to each argument in a function call type FNTYPE declared with attribute nonnull, or null if none of the function's argument are nonnull. The caller must free the bitmap. */ bitmap get_nonnull_args (const_tree fntype) { if (fntype == NULL_TREE) return NULL; bitmap argmap = NULL; if (TREE_CODE (fntype) == METHOD_TYPE) { /* The this pointer in C++ non-static member functions is implicitly nonnull whether or not it's declared as such. */ argmap = BITMAP_ALLOC (NULL); bitmap_set_bit (argmap, 0); } tree attrs = TYPE_ATTRIBUTES (fntype); if (!attrs) return argmap; /* A function declaration can specify multiple attribute nonnull, each with zero or more arguments. The loop below creates a bitmap representing a union of all the arguments. An empty (but non-null) bitmap means that all arguments have been declaraed nonnull. */ for ( ; attrs; attrs = TREE_CHAIN (attrs)) { attrs = lookup_attribute ("nonnull", attrs); if (!attrs) break; if (!argmap) argmap = BITMAP_ALLOC (NULL); if (!TREE_VALUE (attrs)) { /* Clear the bitmap in case a previous attribute nonnull set it and this one overrides it for all arguments. */ bitmap_clear (argmap); return argmap; } /* Iterate over the indices of the format arguments declared nonnull and set a bit for each. */ for (tree idx = TREE_VALUE (attrs); idx; idx = TREE_CHAIN (idx)) { unsigned int val = TREE_INT_CST_LOW (TREE_VALUE (idx)) - 1; bitmap_set_bit (argmap, val); } } return argmap; } /* Returns true if TYPE is a type where it and all of its subobjects (recursively) are of structure, union, or array type. */ bool is_empty_type (const_tree type) { if (RECORD_OR_UNION_TYPE_P (type)) { for (tree field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) if (TREE_CODE (field) == FIELD_DECL && !DECL_PADDING_P (field) && !is_empty_type (TREE_TYPE (field))) return false; return true; } else if (TREE_CODE (type) == ARRAY_TYPE) return (integer_minus_onep (array_type_nelts (type)) || TYPE_DOMAIN (type) == NULL_TREE || is_empty_type (TREE_TYPE (type))); return false; } /* Implement TARGET_EMPTY_RECORD_P. Return true if TYPE is an empty type that shouldn't be passed via stack. */ bool default_is_empty_record (const_tree type) { if (!abi_version_at_least (12)) return false; if (type == error_mark_node) return false; if (TREE_ADDRESSABLE (type)) return false; return is_empty_type (TYPE_MAIN_VARIANT (type)); } /* Determine whether TYPE is a structure with a flexible array member, or a union containing such a structure (possibly recursively). */ bool flexible_array_type_p (const_tree type) { tree x, last; switch (TREE_CODE (type)) { case RECORD_TYPE: last = NULL_TREE; for (x = TYPE_FIELDS (type); x != NULL_TREE; x = DECL_CHAIN (x)) if (TREE_CODE (x) == FIELD_DECL) last = x; if (last == NULL_TREE) return false; if (TREE_CODE (TREE_TYPE (last)) == ARRAY_TYPE && TYPE_SIZE (TREE_TYPE (last)) == NULL_TREE && TYPE_DOMAIN (TREE_TYPE (last)) != NULL_TREE && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (last))) == NULL_TREE) return true; return false; case UNION_TYPE: for (x = TYPE_FIELDS (type); x != NULL_TREE; x = DECL_CHAIN (x)) { if (TREE_CODE (x) == FIELD_DECL && flexible_array_type_p (TREE_TYPE (x))) return true; } return false; default: return false; } } /* Like int_size_in_bytes, but handle empty records specially. */ HOST_WIDE_INT arg_int_size_in_bytes (const_tree type) { return TYPE_EMPTY_P (type) ? 0 : int_size_in_bytes (type); } /* Like size_in_bytes, but handle empty records specially. */ tree arg_size_in_bytes (const_tree type) { return TYPE_EMPTY_P (type) ? size_zero_node : size_in_bytes (type); } /* Return true if an expression with CODE has to have the same result type as its first operand. */ bool expr_type_first_operand_type_p (tree_code code) { switch (code) { case NEGATE_EXPR: case ABS_EXPR: case BIT_NOT_EXPR: case PAREN_EXPR: case CONJ_EXPR: case PLUS_EXPR: case MINUS_EXPR: case MULT_EXPR: case TRUNC_DIV_EXPR: case CEIL_DIV_EXPR: case FLOOR_DIV_EXPR: case ROUND_DIV_EXPR: case TRUNC_MOD_EXPR: case CEIL_MOD_EXPR: case FLOOR_MOD_EXPR: case ROUND_MOD_EXPR: case RDIV_EXPR: case EXACT_DIV_EXPR: case MIN_EXPR: case MAX_EXPR: case BIT_IOR_EXPR: case BIT_XOR_EXPR: case BIT_AND_EXPR: case LSHIFT_EXPR: case RSHIFT_EXPR: case LROTATE_EXPR: case RROTATE_EXPR: return true; default: return false; } } /* Return a typenode for the "standard" C type with a given name. */ tree get_typenode_from_name (const char *name) { if (name == NULL || *name == '\0') return NULL_TREE; if (strcmp (name, "char") == 0) return char_type_node; if (strcmp (name, "unsigned char") == 0) return unsigned_char_type_node; if (strcmp (name, "signed char") == 0) return signed_char_type_node; if (strcmp (name, "short int") == 0) return short_integer_type_node; if (strcmp (name, "short unsigned int") == 0) return short_unsigned_type_node; if (strcmp (name, "int") == 0) return integer_type_node; if (strcmp (name, "unsigned int") == 0) return unsigned_type_node; if (strcmp (name, "long int") == 0) return long_integer_type_node; if (strcmp (name, "long unsigned int") == 0) return long_unsigned_type_node; if (strcmp (name, "long long int") == 0) return long_long_integer_type_node; if (strcmp (name, "long long unsigned int") == 0) return long_long_unsigned_type_node; gcc_unreachable (); } /* List of pointer types used to declare builtins before we have seen their real declaration. Keep the size up to date in tree.h ! */ const builtin_structptr_type builtin_structptr_types[6] = { { fileptr_type_node, ptr_type_node, "FILE" }, { const_tm_ptr_type_node, const_ptr_type_node, "tm" }, { fenv_t_ptr_type_node, ptr_type_node, "fenv_t" }, { const_fenv_t_ptr_type_node, const_ptr_type_node, "fenv_t" }, { fexcept_t_ptr_type_node, ptr_type_node, "fexcept_t" }, { const_fexcept_t_ptr_type_node, const_ptr_type_node, "fexcept_t" } }; /* Return the maximum object size. */ tree max_object_size (void) { /* To do: Make this a configurable parameter. */ return TYPE_MAX_VALUE (ptrdiff_type_node); } /* A wrapper around TARGET_VERIFY_TYPE_CONTEXT that makes the silent_p parameter default to false and that weeds out error_mark_node. */ bool verify_type_context (location_t loc, type_context_kind context, const_tree type, bool silent_p) { if (type == error_mark_node) return true; gcc_assert (TYPE_P (type)); return (!targetm.verify_type_context || targetm.verify_type_context (loc, context, type, silent_p)); } /* Return that NEW_ASM and DELETE_ASM name a valid pair of new and delete operators. */ bool valid_new_delete_pair_p (tree new_asm, tree delete_asm) { const char *new_name = IDENTIFIER_POINTER (new_asm); const char *delete_name = IDENTIFIER_POINTER (delete_asm); unsigned int new_len = IDENTIFIER_LENGTH (new_asm); unsigned int delete_len = IDENTIFIER_LENGTH (delete_asm); if (new_len < 5 || delete_len < 6) return false; if (new_name[0] == '_') ++new_name, --new_len; if (new_name[0] == '_') ++new_name, --new_len; if (delete_name[0] == '_') ++delete_name, --delete_len; if (delete_name[0] == '_') ++delete_name, --delete_len; if (new_len < 4 || delete_len < 5) return false; /* *_len is now just the length after initial underscores. */ if (new_name[0] != 'Z' || new_name[1] != 'n') return false; if (delete_name[0] != 'Z' || delete_name[1] != 'd') return false; /* _Znw must match _Zdl, _Zna must match _Zda. */ if ((new_name[2] != 'w' || delete_name[2] != 'l') && (new_name[2] != 'a' || delete_name[2] != 'a')) return false; /* 'j', 'm' and 'y' correspond to size_t. */ if (new_name[3] != 'j' && new_name[3] != 'm' && new_name[3] != 'y') return false; if (delete_name[3] != 'P' || delete_name[4] != 'v') return false; if (new_len == 4 || (new_len == 18 && !memcmp (new_name + 4, "RKSt9nothrow_t", 14))) { /* _ZnXY or _ZnXYRKSt9nothrow_t matches _ZdXPv, _ZdXPvY and _ZdXPvRKSt9nothrow_t. */ if (delete_len == 5) return true; if (delete_len == 6 && delete_name[5] == new_name[3]) return true; if (delete_len == 19 && !memcmp (delete_name + 5, "RKSt9nothrow_t", 14)) return true; } else if ((new_len == 19 && !memcmp (new_name + 4, "St11align_val_t", 15)) || (new_len == 33 && !memcmp (new_name + 4, "St11align_val_tRKSt9nothrow_t", 29))) { /* _ZnXYSt11align_val_t or _ZnXYSt11align_val_tRKSt9nothrow_t matches _ZdXPvSt11align_val_t or _ZdXPvYSt11align_val_t or or _ZdXPvSt11align_val_tRKSt9nothrow_t. */ if (delete_len == 20 && !memcmp (delete_name + 5, "St11align_val_t", 15)) return true; if (delete_len == 21 && delete_name[5] == new_name[3] && !memcmp (delete_name + 6, "St11align_val_t", 15)) return true; if (delete_len == 34 && !memcmp (delete_name + 5, "St11align_val_tRKSt9nothrow_t", 29)) return true; } return false; } #if CHECKING_P namespace selftest { /* Selftests for tree. */ /* Verify that integer constants are sane. */ static void test_integer_constants () { ASSERT_TRUE (integer_type_node != NULL); ASSERT_TRUE (build_int_cst (integer_type_node, 0) != NULL); tree type = integer_type_node; tree zero = build_zero_cst (type); ASSERT_EQ (INTEGER_CST, TREE_CODE (zero)); ASSERT_EQ (type, TREE_TYPE (zero)); tree one = build_int_cst (type, 1); ASSERT_EQ (INTEGER_CST, TREE_CODE (one)); ASSERT_EQ (type, TREE_TYPE (zero)); } /* Verify identifiers. */ static void test_identifiers () { tree identifier = get_identifier ("foo"); ASSERT_EQ (3, IDENTIFIER_LENGTH (identifier)); ASSERT_STREQ ("foo", IDENTIFIER_POINTER (identifier)); } /* Verify LABEL_DECL. */ static void test_labels () { tree identifier = get_identifier ("err"); tree label_decl = build_decl (UNKNOWN_LOCATION, LABEL_DECL, identifier, void_type_node); ASSERT_EQ (-1, LABEL_DECL_UID (label_decl)); ASSERT_FALSE (FORCED_LABEL (label_decl)); } /* Return a new VECTOR_CST node whose type is TYPE and whose values are given by VALS. */ static tree build_vector (tree type, vec vals MEM_STAT_DECL) { gcc_assert (known_eq (vals.length (), TYPE_VECTOR_SUBPARTS (type))); tree_vector_builder builder (type, vals.length (), 1); builder.splice (vals); return builder.build (); } /* Check that VECTOR_CST ACTUAL contains the elements in EXPECTED. */ static void check_vector_cst (vec expected, tree actual) { ASSERT_KNOWN_EQ (expected.length (), TYPE_VECTOR_SUBPARTS (TREE_TYPE (actual))); for (unsigned int i = 0; i < expected.length (); ++i) ASSERT_EQ (wi::to_wide (expected[i]), wi::to_wide (vector_cst_elt (actual, i))); } /* Check that VECTOR_CST ACTUAL contains NPATTERNS duplicated elements, and that its elements match EXPECTED. */ static void check_vector_cst_duplicate (vec expected, tree actual, unsigned int npatterns) { ASSERT_EQ (npatterns, VECTOR_CST_NPATTERNS (actual)); ASSERT_EQ (1, VECTOR_CST_NELTS_PER_PATTERN (actual)); ASSERT_EQ (npatterns, vector_cst_encoded_nelts (actual)); ASSERT_TRUE (VECTOR_CST_DUPLICATE_P (actual)); ASSERT_FALSE (VECTOR_CST_STEPPED_P (actual)); check_vector_cst (expected, actual); } /* Check that VECTOR_CST ACTUAL contains NPATTERNS foreground elements and NPATTERNS background elements, and that its elements match EXPECTED. */ static void check_vector_cst_fill (vec expected, tree actual, unsigned int npatterns) { ASSERT_EQ (npatterns, VECTOR_CST_NPATTERNS (actual)); ASSERT_EQ (2, VECTOR_CST_NELTS_PER_PATTERN (actual)); ASSERT_EQ (2 * npatterns, vector_cst_encoded_nelts (actual)); ASSERT_FALSE (VECTOR_CST_DUPLICATE_P (actual)); ASSERT_FALSE (VECTOR_CST_STEPPED_P (actual)); check_vector_cst (expected, actual); } /* Check that VECTOR_CST ACTUAL contains NPATTERNS stepped patterns, and that its elements match EXPECTED. */ static void check_vector_cst_stepped (vec expected, tree actual, unsigned int npatterns) { ASSERT_EQ (npatterns, VECTOR_CST_NPATTERNS (actual)); ASSERT_EQ (3, VECTOR_CST_NELTS_PER_PATTERN (actual)); ASSERT_EQ (3 * npatterns, vector_cst_encoded_nelts (actual)); ASSERT_FALSE (VECTOR_CST_DUPLICATE_P (actual)); ASSERT_TRUE (VECTOR_CST_STEPPED_P (actual)); check_vector_cst (expected, actual); } /* Test the creation of VECTOR_CSTs. */ static void test_vector_cst_patterns (ALONE_CXX_MEM_STAT_INFO) { auto_vec elements (8); elements.quick_grow (8); tree element_type = build_nonstandard_integer_type (16, true); tree vector_type = build_vector_type (element_type, 8); /* Test a simple linear series with a base of 0 and a step of 1: { 0, 1, 2, 3, 4, 5, 6, 7 }. */ for (unsigned int i = 0; i < 8; ++i) elements[i] = build_int_cst (element_type, i); tree vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_stepped (elements, vector, 1); /* Try the same with the first element replaced by 100: { 100, 1, 2, 3, 4, 5, 6, 7 }. */ elements[0] = build_int_cst (element_type, 100); vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_stepped (elements, vector, 1); /* Try a series that wraps around. { 100, 65531, 65532, 65533, 65534, 65535, 0, 1 }. */ for (unsigned int i = 1; i < 8; ++i) elements[i] = build_int_cst (element_type, (65530 + i) & 0xffff); vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_stepped (elements, vector, 1); /* Try a downward series: { 100, 79, 78, 77, 76, 75, 75, 73 }. */ for (unsigned int i = 1; i < 8; ++i) elements[i] = build_int_cst (element_type, 80 - i); vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_stepped (elements, vector, 1); /* Try two interleaved series with different bases and steps: { 100, 53, 66, 206, 62, 212, 58, 218 }. */ elements[1] = build_int_cst (element_type, 53); for (unsigned int i = 2; i < 8; i += 2) { elements[i] = build_int_cst (element_type, 70 - i * 2); elements[i + 1] = build_int_cst (element_type, 200 + i * 3); } vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_stepped (elements, vector, 2); /* Try a duplicated value: { 100, 100, 100, 100, 100, 100, 100, 100 }. */ for (unsigned int i = 1; i < 8; ++i) elements[i] = elements[0]; vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_duplicate (elements, vector, 1); /* Try an interleaved duplicated value: { 100, 55, 100, 55, 100, 55, 100, 55 }. */ elements[1] = build_int_cst (element_type, 55); for (unsigned int i = 2; i < 8; ++i) elements[i] = elements[i - 2]; vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_duplicate (elements, vector, 2); /* Try a duplicated value with 2 exceptions { 41, 97, 100, 55, 100, 55, 100, 55 }. */ elements[0] = build_int_cst (element_type, 41); elements[1] = build_int_cst (element_type, 97); vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_fill (elements, vector, 2); /* Try with and without a step { 41, 97, 100, 21, 100, 35, 100, 49 }. */ for (unsigned int i = 3; i < 8; i += 2) elements[i] = build_int_cst (element_type, i * 7); vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_stepped (elements, vector, 2); /* Try a fully-general constant: { 41, 97, 100, 21, 100, 9990, 100, 49 }. */ elements[5] = build_int_cst (element_type, 9990); vector = build_vector (vector_type, elements PASS_MEM_STAT); check_vector_cst_fill (elements, vector, 4); } /* Verify that STRIP_NOPS (NODE) is EXPECTED. Helper function for test_location_wrappers, to deal with STRIP_NOPS modifying its argument in-place. */ static void check_strip_nops (tree node, tree expected) { STRIP_NOPS (node); ASSERT_EQ (expected, node); } /* Verify location wrappers. */ static void test_location_wrappers () { location_t loc = BUILTINS_LOCATION; ASSERT_EQ (NULL_TREE, maybe_wrap_with_location (NULL_TREE, loc)); /* Wrapping a constant. */ tree int_cst = build_int_cst (integer_type_node, 42); ASSERT_FALSE (CAN_HAVE_LOCATION_P (int_cst)); ASSERT_FALSE (location_wrapper_p (int_cst)); tree wrapped_int_cst = maybe_wrap_with_location (int_cst, loc); ASSERT_TRUE (location_wrapper_p (wrapped_int_cst)); ASSERT_EQ (loc, EXPR_LOCATION (wrapped_int_cst)); ASSERT_EQ (int_cst, tree_strip_any_location_wrapper (wrapped_int_cst)); /* We shouldn't add wrapper nodes for UNKNOWN_LOCATION. */ ASSERT_EQ (int_cst, maybe_wrap_with_location (int_cst, UNKNOWN_LOCATION)); /* We shouldn't add wrapper nodes for nodes that CAN_HAVE_LOCATION_P. */ tree cast = build1 (NOP_EXPR, char_type_node, int_cst); ASSERT_TRUE (CAN_HAVE_LOCATION_P (cast)); ASSERT_EQ (cast, maybe_wrap_with_location (cast, loc)); /* Wrapping a STRING_CST. */ tree string_cst = build_string (4, "foo"); ASSERT_FALSE (CAN_HAVE_LOCATION_P (string_cst)); ASSERT_FALSE (location_wrapper_p (string_cst)); tree wrapped_string_cst = maybe_wrap_with_location (string_cst, loc); ASSERT_TRUE (location_wrapper_p (wrapped_string_cst)); ASSERT_EQ (VIEW_CONVERT_EXPR, TREE_CODE (wrapped_string_cst)); ASSERT_EQ (loc, EXPR_LOCATION (wrapped_string_cst)); ASSERT_EQ (string_cst, tree_strip_any_location_wrapper (wrapped_string_cst)); /* Wrapping a variable. */ tree int_var = build_decl (UNKNOWN_LOCATION, VAR_DECL, get_identifier ("some_int_var"), integer_type_node); ASSERT_FALSE (CAN_HAVE_LOCATION_P (int_var)); ASSERT_FALSE (location_wrapper_p (int_var)); tree wrapped_int_var = maybe_wrap_with_location (int_var, loc); ASSERT_TRUE (location_wrapper_p (wrapped_int_var)); ASSERT_EQ (loc, EXPR_LOCATION (wrapped_int_var)); ASSERT_EQ (int_var, tree_strip_any_location_wrapper (wrapped_int_var)); /* Verify that "reinterpret_cast(some_int_var)" is not a location wrapper. */ tree r_cast = build1 (NON_LVALUE_EXPR, integer_type_node, int_var); ASSERT_FALSE (location_wrapper_p (r_cast)); ASSERT_EQ (r_cast, tree_strip_any_location_wrapper (r_cast)); /* Verify that STRIP_NOPS removes wrappers. */ check_strip_nops (wrapped_int_cst, int_cst); check_strip_nops (wrapped_string_cst, string_cst); check_strip_nops (wrapped_int_var, int_var); } /* Test various tree predicates. Verify that location wrappers don't affect the results. */ static void test_predicates () { /* Build various constants and wrappers around them. */ location_t loc = BUILTINS_LOCATION; tree i_0 = build_int_cst (integer_type_node, 0); tree wr_i_0 = maybe_wrap_with_location (i_0, loc); tree i_1 = build_int_cst (integer_type_node, 1); tree wr_i_1 = maybe_wrap_with_location (i_1, loc); tree i_m1 = build_int_cst (integer_type_node, -1); tree wr_i_m1 = maybe_wrap_with_location (i_m1, loc); tree f_0 = build_real_from_int_cst (float_type_node, i_0); tree wr_f_0 = maybe_wrap_with_location (f_0, loc); tree f_1 = build_real_from_int_cst (float_type_node, i_1); tree wr_f_1 = maybe_wrap_with_location (f_1, loc); tree f_m1 = build_real_from_int_cst (float_type_node, i_m1); tree wr_f_m1 = maybe_wrap_with_location (f_m1, loc); tree c_i_0 = build_complex (NULL_TREE, i_0, i_0); tree c_i_1 = build_complex (NULL_TREE, i_1, i_0); tree c_i_m1 = build_complex (NULL_TREE, i_m1, i_0); tree c_f_0 = build_complex (NULL_TREE, f_0, f_0); tree c_f_1 = build_complex (NULL_TREE, f_1, f_0); tree c_f_m1 = build_complex (NULL_TREE, f_m1, f_0); /* TODO: vector constants. */ /* Test integer_onep. */ ASSERT_FALSE (integer_onep (i_0)); ASSERT_FALSE (integer_onep (wr_i_0)); ASSERT_TRUE (integer_onep (i_1)); ASSERT_TRUE (integer_onep (wr_i_1)); ASSERT_FALSE (integer_onep (i_m1)); ASSERT_FALSE (integer_onep (wr_i_m1)); ASSERT_FALSE (integer_onep (f_0)); ASSERT_FALSE (integer_onep (wr_f_0)); ASSERT_FALSE (integer_onep (f_1)); ASSERT_FALSE (integer_onep (wr_f_1)); ASSERT_FALSE (integer_onep (f_m1)); ASSERT_FALSE (integer_onep (wr_f_m1)); ASSERT_FALSE (integer_onep (c_i_0)); ASSERT_TRUE (integer_onep (c_i_1)); ASSERT_FALSE (integer_onep (c_i_m1)); ASSERT_FALSE (integer_onep (c_f_0)); ASSERT_FALSE (integer_onep (c_f_1)); ASSERT_FALSE (integer_onep (c_f_m1)); /* Test integer_zerop. */ ASSERT_TRUE (integer_zerop (i_0)); ASSERT_TRUE (integer_zerop (wr_i_0)); ASSERT_FALSE (integer_zerop (i_1)); ASSERT_FALSE (integer_zerop (wr_i_1)); ASSERT_FALSE (integer_zerop (i_m1)); ASSERT_FALSE (integer_zerop (wr_i_m1)); ASSERT_FALSE (integer_zerop (f_0)); ASSERT_FALSE (integer_zerop (wr_f_0)); ASSERT_FALSE (integer_zerop (f_1)); ASSERT_FALSE (integer_zerop (wr_f_1)); ASSERT_FALSE (integer_zerop (f_m1)); ASSERT_FALSE (integer_zerop (wr_f_m1)); ASSERT_TRUE (integer_zerop (c_i_0)); ASSERT_FALSE (integer_zerop (c_i_1)); ASSERT_FALSE (integer_zerop (c_i_m1)); ASSERT_FALSE (integer_zerop (c_f_0)); ASSERT_FALSE (integer_zerop (c_f_1)); ASSERT_FALSE (integer_zerop (c_f_m1)); /* Test integer_all_onesp. */ ASSERT_FALSE (integer_all_onesp (i_0)); ASSERT_FALSE (integer_all_onesp (wr_i_0)); ASSERT_FALSE (integer_all_onesp (i_1)); ASSERT_FALSE (integer_all_onesp (wr_i_1)); ASSERT_TRUE (integer_all_onesp (i_m1)); ASSERT_TRUE (integer_all_onesp (wr_i_m1)); ASSERT_FALSE (integer_all_onesp (f_0)); ASSERT_FALSE (integer_all_onesp (wr_f_0)); ASSERT_FALSE (integer_all_onesp (f_1)); ASSERT_FALSE (integer_all_onesp (wr_f_1)); ASSERT_FALSE (integer_all_onesp (f_m1)); ASSERT_FALSE (integer_all_onesp (wr_f_m1)); ASSERT_FALSE (integer_all_onesp (c_i_0)); ASSERT_FALSE (integer_all_onesp (c_i_1)); ASSERT_FALSE (integer_all_onesp (c_i_m1)); ASSERT_FALSE (integer_all_onesp (c_f_0)); ASSERT_FALSE (integer_all_onesp (c_f_1)); ASSERT_FALSE (integer_all_onesp (c_f_m1)); /* Test integer_minus_onep. */ ASSERT_FALSE (integer_minus_onep (i_0)); ASSERT_FALSE (integer_minus_onep (wr_i_0)); ASSERT_FALSE (integer_minus_onep (i_1)); ASSERT_FALSE (integer_minus_onep (wr_i_1)); ASSERT_TRUE (integer_minus_onep (i_m1)); ASSERT_TRUE (integer_minus_onep (wr_i_m1)); ASSERT_FALSE (integer_minus_onep (f_0)); ASSERT_FALSE (integer_minus_onep (wr_f_0)); ASSERT_FALSE (integer_minus_onep (f_1)); ASSERT_FALSE (integer_minus_onep (wr_f_1)); ASSERT_FALSE (integer_minus_onep (f_m1)); ASSERT_FALSE (integer_minus_onep (wr_f_m1)); ASSERT_FALSE (integer_minus_onep (c_i_0)); ASSERT_FALSE (integer_minus_onep (c_i_1)); ASSERT_TRUE (integer_minus_onep (c_i_m1)); ASSERT_FALSE (integer_minus_onep (c_f_0)); ASSERT_FALSE (integer_minus_onep (c_f_1)); ASSERT_FALSE (integer_minus_onep (c_f_m1)); /* Test integer_each_onep. */ ASSERT_FALSE (integer_each_onep (i_0)); ASSERT_FALSE (integer_each_onep (wr_i_0)); ASSERT_TRUE (integer_each_onep (i_1)); ASSERT_TRUE (integer_each_onep (wr_i_1)); ASSERT_FALSE (integer_each_onep (i_m1)); ASSERT_FALSE (integer_each_onep (wr_i_m1)); ASSERT_FALSE (integer_each_onep (f_0)); ASSERT_FALSE (integer_each_onep (wr_f_0)); ASSERT_FALSE (integer_each_onep (f_1)); ASSERT_FALSE (integer_each_onep (wr_f_1)); ASSERT_FALSE (integer_each_onep (f_m1)); ASSERT_FALSE (integer_each_onep (wr_f_m1)); ASSERT_FALSE (integer_each_onep (c_i_0)); ASSERT_FALSE (integer_each_onep (c_i_1)); ASSERT_FALSE (integer_each_onep (c_i_m1)); ASSERT_FALSE (integer_each_onep (c_f_0)); ASSERT_FALSE (integer_each_onep (c_f_1)); ASSERT_FALSE (integer_each_onep (c_f_m1)); /* Test integer_truep. */ ASSERT_FALSE (integer_truep (i_0)); ASSERT_FALSE (integer_truep (wr_i_0)); ASSERT_TRUE (integer_truep (i_1)); ASSERT_TRUE (integer_truep (wr_i_1)); ASSERT_FALSE (integer_truep (i_m1)); ASSERT_FALSE (integer_truep (wr_i_m1)); ASSERT_FALSE (integer_truep (f_0)); ASSERT_FALSE (integer_truep (wr_f_0)); ASSERT_FALSE (integer_truep (f_1)); ASSERT_FALSE (integer_truep (wr_f_1)); ASSERT_FALSE (integer_truep (f_m1)); ASSERT_FALSE (integer_truep (wr_f_m1)); ASSERT_FALSE (integer_truep (c_i_0)); ASSERT_TRUE (integer_truep (c_i_1)); ASSERT_FALSE (integer_truep (c_i_m1)); ASSERT_FALSE (integer_truep (c_f_0)); ASSERT_FALSE (integer_truep (c_f_1)); ASSERT_FALSE (integer_truep (c_f_m1)); /* Test integer_nonzerop. */ ASSERT_FALSE (integer_nonzerop (i_0)); ASSERT_FALSE (integer_nonzerop (wr_i_0)); ASSERT_TRUE (integer_nonzerop (i_1)); ASSERT_TRUE (integer_nonzerop (wr_i_1)); ASSERT_TRUE (integer_nonzerop (i_m1)); ASSERT_TRUE (integer_nonzerop (wr_i_m1)); ASSERT_FALSE (integer_nonzerop (f_0)); ASSERT_FALSE (integer_nonzerop (wr_f_0)); ASSERT_FALSE (integer_nonzerop (f_1)); ASSERT_FALSE (integer_nonzerop (wr_f_1)); ASSERT_FALSE (integer_nonzerop (f_m1)); ASSERT_FALSE (integer_nonzerop (wr_f_m1)); ASSERT_FALSE (integer_nonzerop (c_i_0)); ASSERT_TRUE (integer_nonzerop (c_i_1)); ASSERT_TRUE (integer_nonzerop (c_i_m1)); ASSERT_FALSE (integer_nonzerop (c_f_0)); ASSERT_FALSE (integer_nonzerop (c_f_1)); ASSERT_FALSE (integer_nonzerop (c_f_m1)); /* Test real_zerop. */ ASSERT_FALSE (real_zerop (i_0)); ASSERT_FALSE (real_zerop (wr_i_0)); ASSERT_FALSE (real_zerop (i_1)); ASSERT_FALSE (real_zerop (wr_i_1)); ASSERT_FALSE (real_zerop (i_m1)); ASSERT_FALSE (real_zerop (wr_i_m1)); ASSERT_TRUE (real_zerop (f_0)); ASSERT_TRUE (real_zerop (wr_f_0)); ASSERT_FALSE (real_zerop (f_1)); ASSERT_FALSE (real_zerop (wr_f_1)); ASSERT_FALSE (real_zerop (f_m1)); ASSERT_FALSE (real_zerop (wr_f_m1)); ASSERT_FALSE (real_zerop (c_i_0)); ASSERT_FALSE (real_zerop (c_i_1)); ASSERT_FALSE (real_zerop (c_i_m1)); ASSERT_TRUE (real_zerop (c_f_0)); ASSERT_FALSE (real_zerop (c_f_1)); ASSERT_FALSE (real_zerop (c_f_m1)); /* Test real_onep. */ ASSERT_FALSE (real_onep (i_0)); ASSERT_FALSE (real_onep (wr_i_0)); ASSERT_FALSE (real_onep (i_1)); ASSERT_FALSE (real_onep (wr_i_1)); ASSERT_FALSE (real_onep (i_m1)); ASSERT_FALSE (real_onep (wr_i_m1)); ASSERT_FALSE (real_onep (f_0)); ASSERT_FALSE (real_onep (wr_f_0)); ASSERT_TRUE (real_onep (f_1)); ASSERT_TRUE (real_onep (wr_f_1)); ASSERT_FALSE (real_onep (f_m1)); ASSERT_FALSE (real_onep (wr_f_m1)); ASSERT_FALSE (real_onep (c_i_0)); ASSERT_FALSE (real_onep (c_i_1)); ASSERT_FALSE (real_onep (c_i_m1)); ASSERT_FALSE (real_onep (c_f_0)); ASSERT_TRUE (real_onep (c_f_1)); ASSERT_FALSE (real_onep (c_f_m1)); /* Test real_minus_onep. */ ASSERT_FALSE (real_minus_onep (i_0)); ASSERT_FALSE (real_minus_onep (wr_i_0)); ASSERT_FALSE (real_minus_onep (i_1)); ASSERT_FALSE (real_minus_onep (wr_i_1)); ASSERT_FALSE (real_minus_onep (i_m1)); ASSERT_FALSE (real_minus_onep (wr_i_m1)); ASSERT_FALSE (real_minus_onep (f_0)); ASSERT_FALSE (real_minus_onep (wr_f_0)); ASSERT_FALSE (real_minus_onep (f_1)); ASSERT_FALSE (real_minus_onep (wr_f_1)); ASSERT_TRUE (real_minus_onep (f_m1)); ASSERT_TRUE (real_minus_onep (wr_f_m1)); ASSERT_FALSE (real_minus_onep (c_i_0)); ASSERT_FALSE (real_minus_onep (c_i_1)); ASSERT_FALSE (real_minus_onep (c_i_m1)); ASSERT_FALSE (real_minus_onep (c_f_0)); ASSERT_FALSE (real_minus_onep (c_f_1)); ASSERT_TRUE (real_minus_onep (c_f_m1)); /* Test zerop. */ ASSERT_TRUE (zerop (i_0)); ASSERT_TRUE (zerop (wr_i_0)); ASSERT_FALSE (zerop (i_1)); ASSERT_FALSE (zerop (wr_i_1)); ASSERT_FALSE (zerop (i_m1)); ASSERT_FALSE (zerop (wr_i_m1)); ASSERT_TRUE (zerop (f_0)); ASSERT_TRUE (zerop (wr_f_0)); ASSERT_FALSE (zerop (f_1)); ASSERT_FALSE (zerop (wr_f_1)); ASSERT_FALSE (zerop (f_m1)); ASSERT_FALSE (zerop (wr_f_m1)); ASSERT_TRUE (zerop (c_i_0)); ASSERT_FALSE (zerop (c_i_1)); ASSERT_FALSE (zerop (c_i_m1)); ASSERT_TRUE (zerop (c_f_0)); ASSERT_FALSE (zerop (c_f_1)); ASSERT_FALSE (zerop (c_f_m1)); /* Test tree_expr_nonnegative_p. */ ASSERT_TRUE (tree_expr_nonnegative_p (i_0)); ASSERT_TRUE (tree_expr_nonnegative_p (wr_i_0)); ASSERT_TRUE (tree_expr_nonnegative_p (i_1)); ASSERT_TRUE (tree_expr_nonnegative_p (wr_i_1)); ASSERT_FALSE (tree_expr_nonnegative_p (i_m1)); ASSERT_FALSE (tree_expr_nonnegative_p (wr_i_m1)); ASSERT_TRUE (tree_expr_nonnegative_p (f_0)); ASSERT_TRUE (tree_expr_nonnegative_p (wr_f_0)); ASSERT_TRUE (tree_expr_nonnegative_p (f_1)); ASSERT_TRUE (tree_expr_nonnegative_p (wr_f_1)); ASSERT_FALSE (tree_expr_nonnegative_p (f_m1)); ASSERT_FALSE (tree_expr_nonnegative_p (wr_f_m1)); ASSERT_FALSE (tree_expr_nonnegative_p (c_i_0)); ASSERT_FALSE (tree_expr_nonnegative_p (c_i_1)); ASSERT_FALSE (tree_expr_nonnegative_p (c_i_m1)); ASSERT_FALSE (tree_expr_nonnegative_p (c_f_0)); ASSERT_FALSE (tree_expr_nonnegative_p (c_f_1)); ASSERT_FALSE (tree_expr_nonnegative_p (c_f_m1)); /* Test tree_expr_nonzero_p. */ ASSERT_FALSE (tree_expr_nonzero_p (i_0)); ASSERT_FALSE (tree_expr_nonzero_p (wr_i_0)); ASSERT_TRUE (tree_expr_nonzero_p (i_1)); ASSERT_TRUE (tree_expr_nonzero_p (wr_i_1)); ASSERT_TRUE (tree_expr_nonzero_p (i_m1)); ASSERT_TRUE (tree_expr_nonzero_p (wr_i_m1)); /* Test integer_valued_real_p. */ ASSERT_FALSE (integer_valued_real_p (i_0)); ASSERT_TRUE (integer_valued_real_p (f_0)); ASSERT_TRUE (integer_valued_real_p (wr_f_0)); ASSERT_TRUE (integer_valued_real_p (f_1)); ASSERT_TRUE (integer_valued_real_p (wr_f_1)); /* Test integer_pow2p. */ ASSERT_FALSE (integer_pow2p (i_0)); ASSERT_TRUE (integer_pow2p (i_1)); ASSERT_TRUE (integer_pow2p (wr_i_1)); /* Test uniform_integer_cst_p. */ ASSERT_TRUE (uniform_integer_cst_p (i_0)); ASSERT_TRUE (uniform_integer_cst_p (wr_i_0)); ASSERT_TRUE (uniform_integer_cst_p (i_1)); ASSERT_TRUE (uniform_integer_cst_p (wr_i_1)); ASSERT_TRUE (uniform_integer_cst_p (i_m1)); ASSERT_TRUE (uniform_integer_cst_p (wr_i_m1)); ASSERT_FALSE (uniform_integer_cst_p (f_0)); ASSERT_FALSE (uniform_integer_cst_p (wr_f_0)); ASSERT_FALSE (uniform_integer_cst_p (f_1)); ASSERT_FALSE (uniform_integer_cst_p (wr_f_1)); ASSERT_FALSE (uniform_integer_cst_p (f_m1)); ASSERT_FALSE (uniform_integer_cst_p (wr_f_m1)); ASSERT_FALSE (uniform_integer_cst_p (c_i_0)); ASSERT_FALSE (uniform_integer_cst_p (c_i_1)); ASSERT_FALSE (uniform_integer_cst_p (c_i_m1)); ASSERT_FALSE (uniform_integer_cst_p (c_f_0)); ASSERT_FALSE (uniform_integer_cst_p (c_f_1)); ASSERT_FALSE (uniform_integer_cst_p (c_f_m1)); } /* Check that string escaping works correctly. */ static void test_escaped_strings (void) { int saved_cutoff; escaped_string msg; msg.escape (NULL); /* ASSERT_STREQ does not accept NULL as a valid test result, so we have to use ASSERT_EQ instead. */ ASSERT_EQ (NULL, (const char *) msg); msg.escape (""); ASSERT_STREQ ("", (const char *) msg); msg.escape ("foobar"); ASSERT_STREQ ("foobar", (const char *) msg); /* Ensure that we have -fmessage-length set to 0. */ saved_cutoff = pp_line_cutoff (global_dc->printer); pp_line_cutoff (global_dc->printer) = 0; msg.escape ("foo\nbar"); ASSERT_STREQ ("foo\\nbar", (const char *) msg); msg.escape ("\a\b\f\n\r\t\v"); ASSERT_STREQ ("\\a\\b\\f\\n\\r\\t\\v", (const char *) msg); /* Now repeat the tests with -fmessage-length set to 5. */ pp_line_cutoff (global_dc->printer) = 5; /* Note that the newline is not translated into an escape. */ msg.escape ("foo\nbar"); ASSERT_STREQ ("foo\nbar", (const char *) msg); msg.escape ("\a\b\f\n\r\t\v"); ASSERT_STREQ ("\\a\\b\\f\n\\r\\t\\v", (const char *) msg); /* Restore the original message length setting. */ pp_line_cutoff (global_dc->printer) = saved_cutoff; } /* Run all of the selftests within this file. */ void tree_c_tests () { test_integer_constants (); test_identifiers (); test_labels (); test_vector_cst_patterns (); test_location_wrappers (); test_predicates (); test_escaped_strings (); } } // namespace selftest #endif /* CHECKING_P */ #include "gt-tree.h"