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 "pointer-set.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
  36   /* FUNCTION_DECL for function being inlined into, or in general
  37      the destination function receiving the new trees.  */
  38   tree dst_fn;
  39
  40   /* Callgraph node of the source function.  */
  41   struct cgraph_node *src_node;
  42
  43   /* Callgraph node of the destination function.  */
  44   struct cgraph_node *dst_node;
  45
  46   /* struct function for function being inlined.  Usually this is the same
  47      as DECL_STRUCT_FUNCTION (src_fn), but can be different if saved_cfg
  48      and saved_eh are in use.  */
  49   struct function *src_cfun;
  50
  51   /* The VAR_DECL for the return value.  */
  52   tree retvar;
  53
  54   /* The map from local declarations in the inlined function to
  55      equivalents in the function into which it is being inlined.  */
  56   struct pointer_map_t *decl_map;
  57
  58   /* Create a new decl to replace DECL in the destination function.  */
  59   tree (*copy_decl) (tree, struct copy_body_data *);
  60
  61   /* Current BLOCK.  */
  62   tree block;
  63
  64   /* GIMPLE_CALL if va arg parameter packs should be expanded or NULL
  65      is not.  */
  66   gimple gimple_call;
  67
  68   /* Exception region the inlined call lie in.  */
  69   int eh_region;
  70
  71   /* Take region number in the function being copied, add this value and
  72      get eh region number of the duplicate in the function we inline into.  */
  73   int eh_region_offset;
  74
  75   /* We use the same mechanism do all sorts of different things.  Rather
  76      than enumerating the different cases, we categorize the behavior
  77      in the various situations.  */
  78
  79   /* Indicate the desired behavior wrt call graph edges.  We can either
  80      duplicate the edge (inlining, cloning), move the edge (versioning,
  81      parallelization), or move the edges of the clones (saving).  */
  82   enum copy_body_cge_which {
  83     CB_CGE_DUPLICATE,
  84     CB_CGE_MOVE,
  85     CB_CGE_MOVE_CLONES
  86   } transform_call_graph_edges;
  87
  88   /* True if a new CFG should be created.  False for inlining, true for
  89      everything else.  */
  90   bool transform_new_cfg;
  91
  92   /* True if RETURN_EXPRs should be transformed to just the contained
  93      MODIFY_EXPR.  The branch semantics of the return will be handled
  94      by manipulating the CFG rather than a statement.  */
  95   bool transform_return_to_modify;
  96
  97   /* True if this statement will need to be regimplified.  */
  98   bool regimplify;
  99
 100   /* > 0 if we are remapping a type currently.  */
 101   int remapping_type_depth;
 102
 103   /* A function to be called when duplicating BLOCK nodes.  */
 104   void (*transform_lang_insert_block) (tree);
 105
 106   /* Statements that might be possibly folded.  */
 107   struct pointer_set_t *statements_to_fold;
 108
 109   /* Entry basic block to currently copied body.  */
 110   struct basic_block_def *entry_bb;
 111 } copy_body_data;
 112
 113 /* Weights of constructions for estimate_num_insns.  */
 114
 115 typedef struct eni_weights_d
 116 {
 117   /* Cost per call.  */
 118   unsigned call_cost;
 119
 120   /* Cost per call to a target specific builtin */
 121   unsigned target_builtin_call_cost;
 122
 123   /* Cost of "expensive" div and mod operations.  */
 124   unsigned div_mod_cost;
 125
 126   /* Cost for omp construct.  */
 127   unsigned omp_cost;
 128 } eni_weights;
 129
 130 /* Weights that estimate_num_insns uses for heuristics in inlining.  */
 131
 132 extern eni_weights eni_inlining_weights;
 133
 134 /* Weights that estimate_num_insns uses to estimate the size of the
 135    produced code.  */
 136
 137 extern eni_weights eni_size_weights;
 138
 139 /* Weights that estimate_num_insns uses to estimate the time necessary
 140    to execute the produced code.  */
 141
 142 extern eni_weights eni_time_weights;
 143
 144 /* Function prototypes.  */
 145
 146 extern tree copy_tree_body_r (tree *, int *, void *);
 147 extern void insert_decl_map (copy_body_data *, tree, tree);
 148
 149 unsigned int optimize_inline_calls (tree);
 150 bool tree_inlinable_function_p (tree);
 151 tree copy_tree_r (tree *, int *, void *);
 152 tree copy_decl_no_change (tree decl, copy_body_data *id);
 153 void save_body (tree, tree *, tree *);
 154 int estimate_move_cost (tree type);
 155 int estimate_num_insns (gimple, eni_weights *);
 156 int estimate_num_insns_fn (tree, eni_weights *);
 157 int count_insns_seq (gimple_seq, eni_weights *);
 158 bool tree_versionable_function_p (tree);
 159 void tree_function_versioning (tree, tree, varray_type, bool);
 160 bool tree_can_inline_p (tree, tree);
 161
 162 extern gimple_seq remap_gimple_seq (gimple_seq, copy_body_data *);
 163 extern tree remap_decl (tree decl, copy_body_data *id);
 164 extern tree remap_type (tree type, copy_body_data *id);
 165 extern gimple_seq copy_gimple_seq_and_replace_locals (gimple_seq seq);
 166
 167 extern HOST_WIDE_INT estimated_stack_frame_size (void);
 168
 169 #endif /* GCC_TREE_INLINE_H */