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/* Tree inlining hooks and declarations.
Copyright 2001, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
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
<http://www.gnu.org/licenses/>. */
#ifndef GCC_TREE_INLINE_H
#define GCC_TREE_INLINE_H
#include "varray.h"
#include "pointer-set.h"
/* Data required for function body duplication. */
typedef struct copy_body_data
{
/* FUNCTION_DECL for function being inlined, or in general the
source function providing the original trees. */
tree src_fn;
/* FUNCTION_DECL for function being inlined into, or in general
the destination function receiving the new trees. */
tree dst_fn;
/* Callgraph node of the source function. */
struct cgraph_node *src_node;
/* Callgraph node of the destination function. */
struct cgraph_node *dst_node;
/* struct function for function being inlined. Usually this is the same
as DECL_STRUCT_FUNCTION (src_fn), but can be different if saved_cfg
and saved_eh are in use. */
struct function *src_cfun;
/* The VAR_DECL for the return value. */
tree retvar;
/* The map from local declarations in the inlined function to
equivalents in the function into which it is being inlined. */
struct pointer_map_t *decl_map;
/* Create a new decl to replace DECL in the destination function. */
tree (*copy_decl) (tree, struct copy_body_data *);
/* Current BLOCK. */
tree block;
/* Exception region the inlined call lie in. */
int eh_region;
/* Take region number in the function being copied, add this value and
get eh region number of the duplicate in the function we inline into. */
int eh_region_offset;
/* We use the same mechanism do all sorts of different things. Rather
than enumerating the different cases, we categorize the behavior
in the various situations. */
/* Indicate the desired behavior wrt call graph edges. We can either
duplicate the edge (inlining, cloning), move the edge (versioning,
parallelization), or move the edges of the clones (saving). */
enum copy_body_cge_which {
CB_CGE_DUPLICATE,
CB_CGE_MOVE,
CB_CGE_MOVE_CLONES
} transform_call_graph_edges;
/* True if a new CFG should be created. False for inlining, true for
everything else. */
bool transform_new_cfg;
/* True if RETURN_EXPRs should be transformed to just the contained
MODIFY_EXPR. The branch semantics of the return will be handled
by manipulating the CFG rather than a statement. */
bool transform_return_to_modify;
/* True if lang_hooks.decls.insert_block should be invoked when
duplicating BLOCK nodes. */
bool transform_lang_insert_block;
/* Statements that might be possibly folded. */
struct pointer_set_t *statements_to_fold;
} copy_body_data;
/* Weights of constructions for estimate_num_insns. */
typedef struct eni_weights_d
{
/* Cost per call. */
unsigned call_cost;
/* Cost of "expensive" div and mod operations. */
unsigned div_mod_cost;
/* Cost of switch statement. */
unsigned switch_cost;
/* Cost for omp construct. */
unsigned omp_cost;
} eni_weights;
/* Weights that estimate_num_insns uses for heuristics in inlining. */
extern eni_weights eni_inlining_weights;
/* Weights that estimate_num_insns uses to estimate the size of the
produced code. */
extern eni_weights eni_size_weights;
/* Weights that estimate_num_insns uses to estimate the time necessary
to execute the produced code. */
extern eni_weights eni_time_weights;
/* Function prototypes. */
extern tree copy_body_r (tree *, int *, void *);
extern void insert_decl_map (copy_body_data *, tree, tree);
unsigned int optimize_inline_calls (tree);
bool tree_inlinable_function_p (tree);
tree copy_tree_r (tree *, int *, void *);
void clone_body (tree, tree, void *);
void save_body (tree, tree *, tree *);
int estimate_move_cost (tree type);
void push_cfun (struct function *new_cfun);
void pop_cfun (void);
int estimate_num_insns (tree expr, eni_weights *);
bool tree_versionable_function_p (tree);
void tree_function_versioning (tree, tree, varray_type, bool);
extern tree remap_decl (tree decl, copy_body_data *id);
extern tree remap_type (tree type, copy_body_data *id);
extern HOST_WIDE_INT estimated_stack_frame_size (void);
/* 0 if we should not perform inlining.
1 if we should expand functions calls inline at the tree level.
2 if we should consider *all* functions to be inline
candidates. */
extern int flag_inline_trees;
#endif /* GCC_TREE_INLINE_H */
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