gcc/tree-inline.h

   1 /* Tree inlining hooks and declarations.
   2    Copyright 2001, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
   3    Contributed by Alexandre Oliva  <aoliva@redhat.com>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_TREE_INLINE_H
  22 #define GCC_TREE_INLINE_H
  23
  24 #include "varray.h"
  25 #include "splay-tree.h"
  26
  27
  28 /* Data required for function body duplication.  */
  29
  30 typedef struct copy_body_data
  31 {
  32   /* FUNCTION_DECL for function being inlined, or in general the
  33      source function providing the original trees.  */
  34   tree src_fn;
  35   /* FUNCTION_DECL for function being inlined into, or in general
  36      the destination function receiving the new trees.  */
  37   tree dst_fn;
  38   /* Callgraph node of the source function.  */
  39   struct cgraph_node *src_node;
  40   /* Callgraph node of the destination function.  */
  41   struct cgraph_node *dst_node;
  42   /* struct function for function being inlined.  Usually this is the same
  43      as DECL_STRUCT_FUNCTION (src_fn), but can be different if saved_cfg
  44      and saved_eh are in use.  */
  45   struct function *src_cfun;
  46
  47   /* The VAR_DECL for the return value.  */
  48   tree retvar;
  49   /* The map from local declarations in the inlined function to
  50      equivalents in the function into which it is being inlined.  */
  51   splay_tree decl_map;
  52
  53   /* Create a new decl to replace DECL in the destination function.  */
  54   tree (*copy_decl) (tree, struct copy_body_data *);
  55
  56   /* Current BLOCK.  */
  57   tree block;
  58
  59   /* Exception region the inlined call lie in.  */
  60   int eh_region;
  61   /* Take region number in the function being copied, add this value and
  62      get eh region number of the duplicate in the function we inline into.  */
  63   int eh_region_offset;
  64
  65   /* We use the same mechanism do all sorts of different things.  Rather
  66      than enumerating the different cases, we categorize the behavior
  67      in the various situations.  */
  68
  69   /* Indicate the desired behavior wrt call graph edges.  We can either
  70      duplicate the edge (inlining, cloning), move the edge (versioning,
  71      parallelization), or move the edges of the clones (saving).  */
  72   enum copy_body_cge_which {
  73     CB_CGE_DUPLICATE,
  74     CB_CGE_MOVE,
  75     CB_CGE_MOVE_CLONES
  76   } transform_call_graph_edges;
  77
  78   /* True if a new CFG should be created.  False for inlining, true for
  79      everything else.  */
  80   bool transform_new_cfg;
  81
  82   /* True if RETURN_EXPRs should be transformed to just the contained
  83      MODIFY_EXPR.  The branch semantics of the return will be handled
  84      by manipulating the CFG rather than a statement.  */
  85   bool transform_return_to_modify;
  86
  87   /* True if lang_hooks.decls.insert_block should be invoked when
  88      duplicating BLOCK nodes.  */
  89   bool transform_lang_insert_block;
  90 } copy_body_data;
  91
  92 /* Function prototypes.  */
  93
  94 extern tree copy_body_r (tree *, int *, void *);
  95 extern void insert_decl_map (copy_body_data *, tree, tree);
  96
  97 void optimize_inline_calls (tree);
  98 bool tree_inlinable_function_p (tree);
  99 tree copy_tree_r (tree *, int *, void *);
 100 void clone_body (tree, tree, void *);
 101 void save_body (tree, tree *, tree *);
 102 int estimate_move_cost (tree type);
 103 void push_cfun (struct function *new_cfun);
 104 void pop_cfun (void);
 105 int estimate_num_insns (tree expr);
 106 bool tree_versionable_function_p (tree);
 107 void tree_function_versioning (tree, tree, varray_type, bool);
 108
 109 extern tree remap_decl (tree decl, copy_body_data *id);
 110 extern tree remap_type (tree type, copy_body_data *id);
 111
 112 /* 0 if we should not perform inlining.
 113    1 if we should expand functions calls inline at the tree level.
 114    2 if we should consider *all* functions to be inline
 115    candidates.  */
 116
 117 extern int flag_inline_trees;
 118
 119 #endif /* GCC_TREE_INLINE_H */