diff options
Diffstat (limited to 'gcc/cgraphunit.c')
| -rw-r--r-- | gcc/cgraphunit.c | 143 |
1 files changed, 72 insertions, 71 deletions
diff --git a/gcc/cgraphunit.c b/gcc/cgraphunit.c index 0b1009d..fa3aec7 100644 --- a/gcc/cgraphunit.c +++ b/gcc/cgraphunit.c @@ -720,80 +720,81 @@ process_symver_attribute (symtab_node *n) { tree value = lookup_attribute ("symver", DECL_ATTRIBUTES (n->decl)); - if (!value) - return; - if (lookup_attribute ("symver", TREE_CHAIN (value))) + for (; value != NULL; value = TREE_CHAIN (value)) { - error_at (DECL_SOURCE_LOCATION (n->decl), - "multiple versions for one symbol"); - return; - } - tree symver = get_identifier_with_length - (TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (value))), - TREE_STRING_LENGTH (TREE_VALUE (TREE_VALUE (value)))); - symtab_node *def = symtab_node::get_for_asmname (symver); + /* Starting from bintuils 2.35 gas supports: + # Assign foo to bar@V1 and baz@V2. + .symver foo, bar@V1 + .symver foo, baz@V2 + */ + + tree symver = get_identifier_with_length + (TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (value))), + TREE_STRING_LENGTH (TREE_VALUE (TREE_VALUE (value)))); + symtab_node *def = symtab_node::get_for_asmname (symver); + + if (def) + { + error_at (DECL_SOURCE_LOCATION (n->decl), + "duplicate definition of a symbol version"); + inform (DECL_SOURCE_LOCATION (def->decl), + "same version was previously defined here"); + return; + } + if (!n->definition) + { + error_at (DECL_SOURCE_LOCATION (n->decl), + "symbol needs to be defined to have a version"); + return; + } + if (DECL_COMMON (n->decl)) + { + error_at (DECL_SOURCE_LOCATION (n->decl), + "common symbol cannot be versioned"); + return; + } + if (DECL_COMDAT (n->decl)) + { + error_at (DECL_SOURCE_LOCATION (n->decl), + "comdat symbol cannot be versioned"); + return; + } + if (n->weakref) + { + error_at (DECL_SOURCE_LOCATION (n->decl), + "%<weakref%> cannot be versioned"); + return; + } + if (!TREE_PUBLIC (n->decl)) + { + error_at (DECL_SOURCE_LOCATION (n->decl), + "versioned symbol must be public"); + return; + } + if (DECL_VISIBILITY (n->decl) != VISIBILITY_DEFAULT) + { + error_at (DECL_SOURCE_LOCATION (n->decl), + "versioned symbol must have default visibility"); + return; + } - if (def) - { - error_at (DECL_SOURCE_LOCATION (n->decl), - "duplicate definition of a symbol version"); - inform (DECL_SOURCE_LOCATION (def->decl), - "same version was previously defined here"); - return; - } - if (!n->definition) - { - error_at (DECL_SOURCE_LOCATION (n->decl), - "symbol needs to be defined to have a version"); - return; - } - if (DECL_COMMON (n->decl)) - { - error_at (DECL_SOURCE_LOCATION (n->decl), - "common symbol cannot be versioned"); - return; - } - if (DECL_COMDAT (n->decl)) - { - error_at (DECL_SOURCE_LOCATION (n->decl), - "comdat symbol cannot be versioned"); - return; - } - if (n->weakref) - { - error_at (DECL_SOURCE_LOCATION (n->decl), - "%<weakref%> cannot be versioned"); - return; + /* Create new symbol table entry representing the version. */ + tree new_decl = copy_node (n->decl); + + DECL_INITIAL (new_decl) = NULL_TREE; + if (TREE_CODE (new_decl) == FUNCTION_DECL) + DECL_STRUCT_FUNCTION (new_decl) = NULL; + SET_DECL_ASSEMBLER_NAME (new_decl, symver); + TREE_PUBLIC (new_decl) = 1; + DECL_ATTRIBUTES (new_decl) = NULL; + + symtab_node *symver_node = symtab_node::get_create (new_decl); + symver_node->alias = true; + symver_node->definition = true; + symver_node->symver = true; + symver_node->create_reference (n, IPA_REF_ALIAS, NULL); + symver_node->analyzed = true; } - if (!TREE_PUBLIC (n->decl)) - { - error_at (DECL_SOURCE_LOCATION (n->decl), - "versioned symbol must be public"); - return; - } - if (DECL_VISIBILITY (n->decl) != VISIBILITY_DEFAULT) - { - error_at (DECL_SOURCE_LOCATION (n->decl), - "versioned symbol must have default visibility"); - return; - } - - /* Create new symbol table entry representing the version. */ - tree new_decl = copy_node (n->decl); - - DECL_INITIAL (new_decl) = NULL_TREE; - if (TREE_CODE (new_decl) == FUNCTION_DECL) - DECL_STRUCT_FUNCTION (new_decl) = NULL; - SET_DECL_ASSEMBLER_NAME (new_decl, symver); - TREE_PUBLIC (new_decl) = 1; - DECL_ATTRIBUTES (new_decl) = NULL; - - symtab_node *symver_node = symtab_node::get_create (new_decl); - symver_node->alias = true; - symver_node->definition = true; - symver_node->symver = true; - symver_node->create_reference (n, IPA_REF_ALIAS, NULL); - symver_node->analyzed = true; } /* Process attributes common for vars and functions. */ |