aboutsummaryrefslogtreecommitdiff
path: root/gcc/tree-inline.h
blob: d3e5229e209325a5f7edc583c8666c4c658c1e47 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
/* Tree inlining hooks and declarations.
   Copyright (C) 2001-2016 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


struct cgraph_edge;

/* 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
};

typedef int_hash <unsigned short, 0> dependence_hash;

/* Data required for function body duplication.  */

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 VAR_DECL for the return bounds.  */
  tree retbnd;

  /* Assign statements that need bounds copy.  */
  vec<gimple *> assign_stmts;

  /* The map from local declarations in the inlined function to
     equivalents in the function into which it is being inlined.  */
  hash_map<tree, tree> *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;

  /* GIMPLE_CALL if va arg parameter packs should be expanded or NULL
     is not.  */
  gimple *call_stmt;

  /* Exception landing pad the inlined call lies in.  */
  int eh_lp_nr;

  /* Maps region and landing pad structures from the function being copied
     to duplicates created within the function we inline into.  */
  hash_map<void *, void *> *eh_map;

  /* 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.  */

  /* What to do with call graph edges.  */
  enum copy_body_cge_which 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 the parameters of the source function are transformed.
     Only true for inlining.  */
  bool transform_parameter;

  /* True if this statement will need to be regimplified.  */
  bool regimplify;

  /* True if trees should not be unshared.  */
  bool do_not_unshare;

  /* > 0 if we are remapping a type currently.  */
  int remapping_type_depth;

  /* A function to be called when duplicating BLOCK nodes.  */
  void (*transform_lang_insert_block) (tree);

  /* Statements that might be possibly folded.  */
  hash_set<gimple *> *statements_to_fold;

  /* Entry basic block to currently copied body.  */
  basic_block entry_bb;

  /* For partial function versioning, bitmap of bbs to be copied,
     otherwise NULL.  */
  bitmap blocks_to_copy;

  /* Debug statements that need processing.  */
  vec<gdebug *> debug_stmts;

  /* A map from local declarations in the inlined function to
     equivalents in the function into which it is being inlined, where
     the originals have been mapped to a value rather than to a
     variable.  */
  hash_map<tree, tree> *debug_map;
 
  /* Cilk keywords currently need to replace some variables that
     ordinary nested functions do not.  */ 
  bool remap_var_for_cilk;

  /* A map from the inlined functions dependence info cliques to
     equivalents in the function into which it is being inlined.  */
  hash_map<dependence_hash, unsigned short> *dependence_map;
};

/* Weights of constructions for estimate_num_insns.  */

struct eni_weights
{
  /* Cost per call.  */
  unsigned call_cost;

  /* Cost per indirect call.  */
  unsigned indirect_call_cost;

  /* Cost per call to a target specific builtin */
  unsigned target_builtin_call_cost;

  /* Cost of "expensive" div and mod operations.  */
  unsigned div_mod_cost;

  /* Cost for omp construct.  */
  unsigned omp_cost;

  /* Cost for tm transaction.  */
  unsigned tm_cost;

  /* Cost of return.  */
  unsigned return_cost;

  /* True when time of statement should be estimated.  Thus, the
     cost of a switch statement is logarithmic rather than linear in number
     of cases.  */
  bool time_based;
};

/* 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.  */
void init_inline_once (void);
extern tree copy_tree_body_r (tree *, int *, void *);
extern void insert_decl_map (copy_body_data *, tree, tree);
unsigned int optimize_inline_calls (tree);
tree maybe_inline_call_in_expr (tree);
bool tree_inlinable_function_p (tree);
tree copy_tree_r (tree *, int *, void *);
tree copy_decl_no_change (tree decl, copy_body_data *id);
int estimate_move_cost (tree type, bool);
int estimate_num_insns (gimple *, eni_weights *);
int estimate_num_insns_fn (tree, eni_weights *);
int estimate_num_insns_seq (gimple_seq, eni_weights *);
bool tree_versionable_function_p (tree);
extern tree remap_decl (tree decl, copy_body_data *id);
extern tree remap_type (tree type, copy_body_data *id);
extern gimple_seq copy_gimple_seq_and_replace_locals (gimple_seq seq);
extern bool debug_find_tree (tree, tree);
extern tree copy_fn (tree, tree&, tree&);
extern const char *copy_forbidden (struct function *fun, tree fndecl);

/* This is in tree-inline.c since the routine uses
   data structures from the inliner.  */
extern tree build_duplicate_type (tree);

#endif /* GCC_TREE_INLINE_H */