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Commit | Line | Data |
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ac534736 | 1 | /* Tree inlining. |
ebb07520 RS |
2 | Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
3 | Free Software Foundation, Inc. | |
588d3ade AO |
4 | Contributed by Alexandre Oliva <aoliva@redhat.com> |
5 | ||
54a7b573 | 6 | This file is part of GCC. |
588d3ade | 7 | |
54a7b573 | 8 | GCC is free software; you can redistribute it and/or modify |
588d3ade AO |
9 | it under the terms of the GNU General Public License as published by |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
54a7b573 | 13 | GCC is distributed in the hope that it will be useful, |
588d3ade AO |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
54a7b573 | 19 | along with GCC; see the file COPYING. If not, write to |
366ccddb KC |
20 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
588d3ade AO |
22 | |
23 | #include "config.h" | |
24 | #include "system.h" | |
4977bab6 ZW |
25 | #include "coretypes.h" |
26 | #include "tm.h" | |
69dcadff | 27 | #include "toplev.h" |
588d3ade AO |
28 | #include "tree.h" |
29 | #include "tree-inline.h" | |
d4e4baa9 AO |
30 | #include "rtl.h" |
31 | #include "expr.h" | |
32 | #include "flags.h" | |
33 | #include "params.h" | |
34 | #include "input.h" | |
35 | #include "insn-config.h" | |
d4e4baa9 AO |
36 | #include "varray.h" |
37 | #include "hashtab.h" | |
d23c55c2 | 38 | #include "langhooks.h" |
e21aff8a SB |
39 | #include "basic-block.h" |
40 | #include "tree-iterator.h" | |
1c4a429a | 41 | #include "cgraph.h" |
ddd2d57e | 42 | #include "intl.h" |
6de9cd9a | 43 | #include "tree-mudflap.h" |
089efaa4 | 44 | #include "tree-flow.h" |
18c6ada9 | 45 | #include "function.h" |
e21aff8a SB |
46 | #include "ggc.h" |
47 | #include "tree-flow.h" | |
6de9cd9a | 48 | #include "diagnostic.h" |
e21aff8a | 49 | #include "except.h" |
1eb3331e | 50 | #include "debug.h" |
e21aff8a | 51 | #include "pointer-set.h" |
19734dd8 | 52 | #include "ipa-prop.h" |
6946b3f7 | 53 | #include "value-prof.h" |
110cfe1c | 54 | #include "tree-pass.h" |
d4e4baa9 | 55 | |
6de9cd9a DN |
56 | /* I'm not real happy about this, but we need to handle gimple and |
57 | non-gimple trees. */ | |
eadf906f | 58 | #include "tree-gimple.h" |
588d3ade | 59 | |
1b369fae | 60 | /* Inlining, Cloning, Versioning, Parallelization |
e21aff8a SB |
61 | |
62 | Inlining: a function body is duplicated, but the PARM_DECLs are | |
63 | remapped into VAR_DECLs, and non-void RETURN_EXPRs become | |
07beea0d | 64 | GIMPLE_MODIFY_STMTs that store to a dedicated returned-value variable. |
e21aff8a SB |
65 | The duplicated eh_region info of the copy will later be appended |
66 | to the info for the caller; the eh_region info in copied throwing | |
67 | statements and RESX_EXPRs is adjusted accordingly. | |
68 | ||
e21aff8a SB |
69 | Cloning: (only in C++) We have one body for a con/de/structor, and |
70 | multiple function decls, each with a unique parameter list. | |
71 | Duplicate the body, using the given splay tree; some parameters | |
72 | will become constants (like 0 or 1). | |
73 | ||
1b369fae RH |
74 | Versioning: a function body is duplicated and the result is a new |
75 | function rather than into blocks of an existing function as with | |
76 | inlining. Some parameters will become constants. | |
77 | ||
78 | Parallelization: a region of a function is duplicated resulting in | |
79 | a new function. Variables may be replaced with complex expressions | |
80 | to enable shared variable semantics. | |
81 | ||
e21aff8a SB |
82 | All of these will simultaneously lookup any callgraph edges. If |
83 | we're going to inline the duplicated function body, and the given | |
84 | function has some cloned callgraph nodes (one for each place this | |
85 | function will be inlined) those callgraph edges will be duplicated. | |
1b369fae | 86 | If we're cloning the body, those callgraph edges will be |
e21aff8a SB |
87 | updated to point into the new body. (Note that the original |
88 | callgraph node and edge list will not be altered.) | |
89 | ||
90 | See the CALL_EXPR handling case in copy_body_r (). */ | |
91 | ||
588d3ade | 92 | /* 0 if we should not perform inlining. |
d92b4486 KH |
93 | 1 if we should expand functions calls inline at the tree level. |
94 | 2 if we should consider *all* functions to be inline | |
588d3ade AO |
95 | candidates. */ |
96 | ||
97 | int flag_inline_trees = 0; | |
d4e4baa9 AO |
98 | |
99 | /* To Do: | |
100 | ||
101 | o In order to make inlining-on-trees work, we pessimized | |
102 | function-local static constants. In particular, they are now | |
103 | always output, even when not addressed. Fix this by treating | |
104 | function-local static constants just like global static | |
105 | constants; the back-end already knows not to output them if they | |
106 | are not needed. | |
107 | ||
108 | o Provide heuristics to clamp inlining of recursive template | |
109 | calls? */ | |
110 | ||
7f9bc51b ZD |
111 | |
112 | /* Weights that estimate_num_insns uses for heuristics in inlining. */ | |
113 | ||
114 | eni_weights eni_inlining_weights; | |
115 | ||
116 | /* Weights that estimate_num_insns uses to estimate the size of the | |
117 | produced code. */ | |
118 | ||
119 | eni_weights eni_size_weights; | |
120 | ||
121 | /* Weights that estimate_num_insns uses to estimate the time necessary | |
122 | to execute the produced code. */ | |
123 | ||
124 | eni_weights eni_time_weights; | |
125 | ||
d4e4baa9 AO |
126 | /* Prototypes. */ |
127 | ||
1b369fae RH |
128 | static tree declare_return_variable (copy_body_data *, tree, tree, tree *); |
129 | static tree copy_generic_body (copy_body_data *); | |
b3c3af2f | 130 | static bool inlinable_function_p (tree); |
1b369fae RH |
131 | static void remap_block (tree *, copy_body_data *); |
132 | static tree remap_decls (tree, copy_body_data *); | |
133 | static void copy_bind_expr (tree *, int *, copy_body_data *); | |
6de9cd9a | 134 | static tree mark_local_for_remap_r (tree *, int *, void *); |
19114537 | 135 | static void unsave_expr_1 (tree); |
6de9cd9a | 136 | static tree unsave_r (tree *, int *, void *); |
e21aff8a | 137 | static void declare_inline_vars (tree, tree); |
892c7e1e | 138 | static void remap_save_expr (tree *, void *, int *); |
acb8f212 | 139 | static void add_lexical_block (tree current_block, tree new_block); |
1b369fae | 140 | static tree copy_decl_to_var (tree, copy_body_data *); |
c08cd4c1 | 141 | static tree copy_result_decl_to_var (tree, copy_body_data *); |
1b369fae RH |
142 | static tree copy_decl_no_change (tree, copy_body_data *); |
143 | static tree copy_decl_maybe_to_var (tree, copy_body_data *); | |
e21aff8a | 144 | |
5e20bdd7 JZ |
145 | /* Insert a tree->tree mapping for ID. Despite the name suggests |
146 | that the trees should be variables, it is used for more than that. */ | |
147 | ||
1b369fae RH |
148 | void |
149 | insert_decl_map (copy_body_data *id, tree key, tree value) | |
5e20bdd7 | 150 | { |
6be42dd4 | 151 | *pointer_map_insert (id->decl_map, key) = value; |
5e20bdd7 JZ |
152 | |
153 | /* Always insert an identity map as well. If we see this same new | |
154 | node again, we won't want to duplicate it a second time. */ | |
155 | if (key != value) | |
6be42dd4 | 156 | *pointer_map_insert (id->decl_map, value) = value; |
5e20bdd7 JZ |
157 | } |
158 | ||
110cfe1c JH |
159 | /* Construct new SSA name for old NAME. ID is the inline context. */ |
160 | ||
161 | static tree | |
162 | remap_ssa_name (tree name, copy_body_data *id) | |
163 | { | |
164 | tree new; | |
6be42dd4 | 165 | tree *n; |
110cfe1c JH |
166 | |
167 | gcc_assert (TREE_CODE (name) == SSA_NAME); | |
168 | ||
6be42dd4 | 169 | n = (tree *) pointer_map_contains (id->decl_map, name); |
110cfe1c | 170 | if (n) |
6be42dd4 | 171 | return *n; |
110cfe1c JH |
172 | |
173 | /* Do not set DEF_STMT yet as statement is not copied yet. We do that | |
174 | in copy_bb. */ | |
175 | new = remap_decl (SSA_NAME_VAR (name), id); | |
176 | /* We might've substituted constant or another SSA_NAME for | |
177 | the variable. | |
178 | ||
179 | Replace the SSA name representing RESULT_DECL by variable during | |
180 | inlining: this saves us from need to introduce PHI node in a case | |
181 | return value is just partly initialized. */ | |
182 | if ((TREE_CODE (new) == VAR_DECL || TREE_CODE (new) == PARM_DECL) | |
183 | && (TREE_CODE (SSA_NAME_VAR (name)) != RESULT_DECL | |
184 | || !id->transform_return_to_modify)) | |
185 | { | |
186 | new = make_ssa_name (new, NULL); | |
187 | insert_decl_map (id, name, new); | |
188 | if (IS_EMPTY_STMT (SSA_NAME_DEF_STMT (name))) | |
189 | { | |
190 | SSA_NAME_DEF_STMT (new) = build_empty_stmt (); | |
191 | if (gimple_default_def (id->src_cfun, SSA_NAME_VAR (name)) == name) | |
192 | set_default_def (SSA_NAME_VAR (new), new); | |
193 | } | |
194 | SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new) | |
195 | = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name); | |
196 | TREE_TYPE (new) = TREE_TYPE (SSA_NAME_VAR (new)); | |
197 | } | |
198 | else | |
199 | insert_decl_map (id, name, new); | |
200 | return new; | |
201 | } | |
202 | ||
e21aff8a | 203 | /* Remap DECL during the copying of the BLOCK tree for the function. */ |
d4e4baa9 | 204 | |
1b369fae RH |
205 | tree |
206 | remap_decl (tree decl, copy_body_data *id) | |
d4e4baa9 | 207 | { |
6be42dd4 | 208 | tree *n; |
e21aff8a SB |
209 | tree fn; |
210 | ||
211 | /* We only remap local variables in the current function. */ | |
1b369fae | 212 | fn = id->src_fn; |
3c2a7a6a | 213 | |
e21aff8a SB |
214 | /* See if we have remapped this declaration. */ |
215 | ||
6be42dd4 | 216 | n = (tree *) pointer_map_contains (id->decl_map, decl); |
e21aff8a SB |
217 | |
218 | /* If we didn't already have an equivalent for this declaration, | |
219 | create one now. */ | |
d4e4baa9 AO |
220 | if (!n) |
221 | { | |
d4e4baa9 | 222 | /* Make a copy of the variable or label. */ |
1b369fae | 223 | tree t = id->copy_decl (decl, id); |
19734dd8 | 224 | |
596b98ce AO |
225 | /* Remember it, so that if we encounter this local entity again |
226 | we can reuse this copy. Do this early because remap_type may | |
227 | need this decl for TYPE_STUB_DECL. */ | |
228 | insert_decl_map (id, decl, t); | |
229 | ||
1b369fae RH |
230 | if (!DECL_P (t)) |
231 | return t; | |
232 | ||
3c2a7a6a RH |
233 | /* Remap types, if necessary. */ |
234 | TREE_TYPE (t) = remap_type (TREE_TYPE (t), id); | |
235 | if (TREE_CODE (t) == TYPE_DECL) | |
236 | DECL_ORIGINAL_TYPE (t) = remap_type (DECL_ORIGINAL_TYPE (t), id); | |
3c2a7a6a RH |
237 | |
238 | /* Remap sizes as necessary. */ | |
239 | walk_tree (&DECL_SIZE (t), copy_body_r, id, NULL); | |
240 | walk_tree (&DECL_SIZE_UNIT (t), copy_body_r, id, NULL); | |
d4e4baa9 | 241 | |
8c27b7d4 | 242 | /* If fields, do likewise for offset and qualifier. */ |
5377d5ba RK |
243 | if (TREE_CODE (t) == FIELD_DECL) |
244 | { | |
245 | walk_tree (&DECL_FIELD_OFFSET (t), copy_body_r, id, NULL); | |
246 | if (TREE_CODE (DECL_CONTEXT (t)) == QUAL_UNION_TYPE) | |
247 | walk_tree (&DECL_QUALIFIER (t), copy_body_r, id, NULL); | |
248 | } | |
249 | ||
110cfe1c JH |
250 | if (cfun && gimple_in_ssa_p (cfun) |
251 | && (TREE_CODE (t) == VAR_DECL | |
252 | || TREE_CODE (t) == RESULT_DECL || TREE_CODE (t) == PARM_DECL)) | |
253 | { | |
254 | tree def = gimple_default_def (id->src_cfun, decl); | |
255 | get_var_ann (t); | |
256 | if (TREE_CODE (decl) != PARM_DECL && def) | |
257 | { | |
258 | tree map = remap_ssa_name (def, id); | |
259 | /* Watch out RESULT_DECLs whose SSA names map directly | |
260 | to them. */ | |
261 | if (TREE_CODE (map) == SSA_NAME) | |
262 | set_default_def (t, map); | |
263 | } | |
264 | add_referenced_var (t); | |
265 | } | |
5e20bdd7 | 266 | return t; |
d4e4baa9 AO |
267 | } |
268 | ||
6be42dd4 | 269 | return unshare_expr (*n); |
d4e4baa9 AO |
270 | } |
271 | ||
3c2a7a6a | 272 | static tree |
1b369fae | 273 | remap_type_1 (tree type, copy_body_data *id) |
3c2a7a6a | 274 | { |
6be42dd4 | 275 | tree *node; |
3c2a7a6a RH |
276 | tree new, t; |
277 | ||
1b369fae RH |
278 | if (type == NULL) |
279 | return type; | |
280 | ||
281 | /* See if we have remapped this type. */ | |
6be42dd4 | 282 | node = (tree *) pointer_map_contains (id->decl_map, type); |
1b369fae | 283 | if (node) |
6be42dd4 | 284 | return *node; |
1b369fae RH |
285 | |
286 | /* The type only needs remapping if it's variably modified. */ | |
287 | if (! variably_modified_type_p (type, id->src_fn)) | |
288 | { | |
289 | insert_decl_map (id, type, type); | |
290 | return type; | |
291 | } | |
292 | ||
ed397c43 RK |
293 | /* We do need a copy. build and register it now. If this is a pointer or |
294 | reference type, remap the designated type and make a new pointer or | |
295 | reference type. */ | |
296 | if (TREE_CODE (type) == POINTER_TYPE) | |
297 | { | |
298 | new = build_pointer_type_for_mode (remap_type (TREE_TYPE (type), id), | |
299 | TYPE_MODE (type), | |
300 | TYPE_REF_CAN_ALIAS_ALL (type)); | |
301 | insert_decl_map (id, type, new); | |
302 | return new; | |
303 | } | |
304 | else if (TREE_CODE (type) == REFERENCE_TYPE) | |
305 | { | |
306 | new = build_reference_type_for_mode (remap_type (TREE_TYPE (type), id), | |
307 | TYPE_MODE (type), | |
308 | TYPE_REF_CAN_ALIAS_ALL (type)); | |
309 | insert_decl_map (id, type, new); | |
310 | return new; | |
311 | } | |
312 | else | |
313 | new = copy_node (type); | |
314 | ||
5e20bdd7 | 315 | insert_decl_map (id, type, new); |
3c2a7a6a RH |
316 | |
317 | /* This is a new type, not a copy of an old type. Need to reassociate | |
318 | variants. We can handle everything except the main variant lazily. */ | |
319 | t = TYPE_MAIN_VARIANT (type); | |
320 | if (type != t) | |
321 | { | |
322 | t = remap_type (t, id); | |
323 | TYPE_MAIN_VARIANT (new) = t; | |
324 | TYPE_NEXT_VARIANT (new) = TYPE_MAIN_VARIANT (t); | |
325 | TYPE_NEXT_VARIANT (t) = new; | |
326 | } | |
327 | else | |
328 | { | |
329 | TYPE_MAIN_VARIANT (new) = new; | |
330 | TYPE_NEXT_VARIANT (new) = NULL; | |
331 | } | |
332 | ||
596b98ce AO |
333 | if (TYPE_STUB_DECL (type)) |
334 | TYPE_STUB_DECL (new) = remap_decl (TYPE_STUB_DECL (type), id); | |
335 | ||
3c2a7a6a RH |
336 | /* Lazily create pointer and reference types. */ |
337 | TYPE_POINTER_TO (new) = NULL; | |
338 | TYPE_REFERENCE_TO (new) = NULL; | |
339 | ||
340 | switch (TREE_CODE (new)) | |
341 | { | |
342 | case INTEGER_TYPE: | |
343 | case REAL_TYPE: | |
344 | case ENUMERAL_TYPE: | |
345 | case BOOLEAN_TYPE: | |
3c2a7a6a RH |
346 | t = TYPE_MIN_VALUE (new); |
347 | if (t && TREE_CODE (t) != INTEGER_CST) | |
348 | walk_tree (&TYPE_MIN_VALUE (new), copy_body_r, id, NULL); | |
1c9766da | 349 | |
3c2a7a6a RH |
350 | t = TYPE_MAX_VALUE (new); |
351 | if (t && TREE_CODE (t) != INTEGER_CST) | |
352 | walk_tree (&TYPE_MAX_VALUE (new), copy_body_r, id, NULL); | |
353 | return new; | |
9f63daea | 354 | |
3c2a7a6a RH |
355 | case FUNCTION_TYPE: |
356 | TREE_TYPE (new) = remap_type (TREE_TYPE (new), id); | |
357 | walk_tree (&TYPE_ARG_TYPES (new), copy_body_r, id, NULL); | |
358 | return new; | |
359 | ||
360 | case ARRAY_TYPE: | |
361 | TREE_TYPE (new) = remap_type (TREE_TYPE (new), id); | |
362 | TYPE_DOMAIN (new) = remap_type (TYPE_DOMAIN (new), id); | |
363 | break; | |
364 | ||
365 | case RECORD_TYPE: | |
366 | case UNION_TYPE: | |
367 | case QUAL_UNION_TYPE: | |
52dd234b RH |
368 | { |
369 | tree f, nf = NULL; | |
370 | ||
371 | for (f = TYPE_FIELDS (new); f ; f = TREE_CHAIN (f)) | |
372 | { | |
373 | t = remap_decl (f, id); | |
374 | DECL_CONTEXT (t) = new; | |
375 | TREE_CHAIN (t) = nf; | |
376 | nf = t; | |
377 | } | |
378 | TYPE_FIELDS (new) = nreverse (nf); | |
379 | } | |
3c2a7a6a RH |
380 | break; |
381 | ||
3c2a7a6a RH |
382 | case OFFSET_TYPE: |
383 | default: | |
384 | /* Shouldn't have been thought variable sized. */ | |
1e128c5f | 385 | gcc_unreachable (); |
3c2a7a6a RH |
386 | } |
387 | ||
388 | walk_tree (&TYPE_SIZE (new), copy_body_r, id, NULL); | |
389 | walk_tree (&TYPE_SIZE_UNIT (new), copy_body_r, id, NULL); | |
390 | ||
391 | return new; | |
392 | } | |
393 | ||
1b369fae RH |
394 | tree |
395 | remap_type (tree type, copy_body_data *id) | |
52dd234b | 396 | { |
6be42dd4 | 397 | tree *node; |
52dd234b RH |
398 | |
399 | if (type == NULL) | |
400 | return type; | |
401 | ||
402 | /* See if we have remapped this type. */ | |
6be42dd4 | 403 | node = (tree *) pointer_map_contains (id->decl_map, type); |
52dd234b | 404 | if (node) |
6be42dd4 | 405 | return *node; |
52dd234b RH |
406 | |
407 | /* The type only needs remapping if it's variably modified. */ | |
1b369fae | 408 | if (! variably_modified_type_p (type, id->src_fn)) |
52dd234b RH |
409 | { |
410 | insert_decl_map (id, type, type); | |
411 | return type; | |
412 | } | |
413 | ||
414 | return remap_type_1 (type, id); | |
415 | } | |
416 | ||
6de9cd9a | 417 | static tree |
1b369fae | 418 | remap_decls (tree decls, copy_body_data *id) |
d4e4baa9 | 419 | { |
6de9cd9a DN |
420 | tree old_var; |
421 | tree new_decls = NULL_TREE; | |
d4e4baa9 | 422 | |
6de9cd9a DN |
423 | /* Remap its variables. */ |
424 | for (old_var = decls; old_var; old_var = TREE_CHAIN (old_var)) | |
d4e4baa9 | 425 | { |
6de9cd9a DN |
426 | tree new_var; |
427 | ||
30be951a JH |
428 | /* We can not chain the local static declarations into the unexpanded_var_list |
429 | as we can't duplicate them or break one decl rule. Go ahead and link | |
430 | them into unexpanded_var_list. */ | |
1b369fae | 431 | if (!lang_hooks.tree_inlining.auto_var_in_fn_p (old_var, id->src_fn) |
30be951a JH |
432 | && !DECL_EXTERNAL (old_var)) |
433 | { | |
434 | cfun->unexpanded_var_list = tree_cons (NULL_TREE, old_var, | |
435 | cfun->unexpanded_var_list); | |
436 | continue; | |
437 | } | |
438 | ||
6de9cd9a DN |
439 | /* Remap the variable. */ |
440 | new_var = remap_decl (old_var, id); | |
441 | ||
442 | /* If we didn't remap this variable, so we can't mess with its | |
443 | TREE_CHAIN. If we remapped this variable to the return slot, it's | |
444 | already declared somewhere else, so don't declare it here. */ | |
445 | if (!new_var || new_var == id->retvar) | |
446 | ; | |
d4e4baa9 AO |
447 | else |
448 | { | |
1e128c5f | 449 | gcc_assert (DECL_P (new_var)); |
6de9cd9a DN |
450 | TREE_CHAIN (new_var) = new_decls; |
451 | new_decls = new_var; | |
d4e4baa9 | 452 | } |
d4e4baa9 | 453 | } |
d4e4baa9 | 454 | |
6de9cd9a DN |
455 | return nreverse (new_decls); |
456 | } | |
457 | ||
458 | /* Copy the BLOCK to contain remapped versions of the variables | |
459 | therein. And hook the new block into the block-tree. */ | |
460 | ||
461 | static void | |
1b369fae | 462 | remap_block (tree *block, copy_body_data *id) |
6de9cd9a | 463 | { |
d436bff8 AH |
464 | tree old_block; |
465 | tree new_block; | |
d436bff8 AH |
466 | tree fn; |
467 | ||
468 | /* Make the new block. */ | |
469 | old_block = *block; | |
470 | new_block = make_node (BLOCK); | |
471 | TREE_USED (new_block) = TREE_USED (old_block); | |
472 | BLOCK_ABSTRACT_ORIGIN (new_block) = old_block; | |
3e2844cb | 473 | BLOCK_SOURCE_LOCATION (new_block) = BLOCK_SOURCE_LOCATION (old_block); |
d436bff8 AH |
474 | *block = new_block; |
475 | ||
476 | /* Remap its variables. */ | |
6de9cd9a | 477 | BLOCK_VARS (new_block) = remap_decls (BLOCK_VARS (old_block), id); |
d436bff8 | 478 | |
1b369fae RH |
479 | fn = id->dst_fn; |
480 | ||
481 | if (id->transform_lang_insert_block) | |
673fda6b | 482 | lang_hooks.decls.insert_block (new_block); |
1b369fae | 483 | |
d436bff8 | 484 | /* Remember the remapped block. */ |
6de9cd9a | 485 | insert_decl_map (id, old_block, new_block); |
d4e4baa9 AO |
486 | } |
487 | ||
acb8f212 JH |
488 | /* Copy the whole block tree and root it in id->block. */ |
489 | static tree | |
1b369fae | 490 | remap_blocks (tree block, copy_body_data *id) |
acb8f212 JH |
491 | { |
492 | tree t; | |
493 | tree new = block; | |
494 | ||
495 | if (!block) | |
496 | return NULL; | |
497 | ||
498 | remap_block (&new, id); | |
499 | gcc_assert (new != block); | |
500 | for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t)) | |
501 | add_lexical_block (new, remap_blocks (t, id)); | |
502 | return new; | |
503 | } | |
504 | ||
d4e4baa9 | 505 | static void |
6de9cd9a | 506 | copy_statement_list (tree *tp) |
d4e4baa9 | 507 | { |
6de9cd9a DN |
508 | tree_stmt_iterator oi, ni; |
509 | tree new; | |
510 | ||
511 | new = alloc_stmt_list (); | |
512 | ni = tsi_start (new); | |
513 | oi = tsi_start (*tp); | |
514 | *tp = new; | |
515 | ||
516 | for (; !tsi_end_p (oi); tsi_next (&oi)) | |
517 | tsi_link_after (&ni, tsi_stmt (oi), TSI_NEW_STMT); | |
518 | } | |
d4e4baa9 | 519 | |
6de9cd9a | 520 | static void |
1b369fae | 521 | copy_bind_expr (tree *tp, int *walk_subtrees, copy_body_data *id) |
6de9cd9a DN |
522 | { |
523 | tree block = BIND_EXPR_BLOCK (*tp); | |
d4e4baa9 AO |
524 | /* Copy (and replace) the statement. */ |
525 | copy_tree_r (tp, walk_subtrees, NULL); | |
6de9cd9a DN |
526 | if (block) |
527 | { | |
528 | remap_block (&block, id); | |
529 | BIND_EXPR_BLOCK (*tp) = block; | |
530 | } | |
d4e4baa9 | 531 | |
6de9cd9a DN |
532 | if (BIND_EXPR_VARS (*tp)) |
533 | /* This will remap a lot of the same decls again, but this should be | |
534 | harmless. */ | |
535 | BIND_EXPR_VARS (*tp) = remap_decls (BIND_EXPR_VARS (*tp), id); | |
d4e4baa9 AO |
536 | } |
537 | ||
e21aff8a | 538 | /* Called from copy_body_id via walk_tree. DATA is really an |
1b369fae | 539 | `copy_body_data *'. */ |
aa4a53af | 540 | |
1b369fae | 541 | tree |
46c5ad27 | 542 | copy_body_r (tree *tp, int *walk_subtrees, void *data) |
d4e4baa9 | 543 | { |
1b369fae RH |
544 | copy_body_data *id = (copy_body_data *) data; |
545 | tree fn = id->src_fn; | |
acb8f212 | 546 | tree new_block; |
d4e4baa9 | 547 | |
e21aff8a SB |
548 | /* Begin by recognizing trees that we'll completely rewrite for the |
549 | inlining context. Our output for these trees is completely | |
550 | different from out input (e.g. RETURN_EXPR is deleted, and morphs | |
551 | into an edge). Further down, we'll handle trees that get | |
552 | duplicated and/or tweaked. */ | |
d4e4baa9 | 553 | |
1b369fae | 554 | /* When requested, RETURN_EXPRs should be transformed to just the |
07beea0d | 555 | contained GIMPLE_MODIFY_STMT. The branch semantics of the return will |
1b369fae RH |
556 | be handled elsewhere by manipulating the CFG rather than a statement. */ |
557 | if (TREE_CODE (*tp) == RETURN_EXPR && id->transform_return_to_modify) | |
d4e4baa9 | 558 | { |
e21aff8a | 559 | tree assignment = TREE_OPERAND (*tp, 0); |
d4e4baa9 AO |
560 | |
561 | /* If we're returning something, just turn that into an | |
e21aff8a SB |
562 | assignment into the equivalent of the original RESULT_DECL. |
563 | If the "assignment" is just the result decl, the result | |
564 | decl has already been set (e.g. a recent "foo (&result_decl, | |
565 | ...)"); just toss the entire RETURN_EXPR. */ | |
07beea0d | 566 | if (assignment && TREE_CODE (assignment) == GIMPLE_MODIFY_STMT) |
e21aff8a SB |
567 | { |
568 | /* Replace the RETURN_EXPR with (a copy of) the | |
07beea0d | 569 | GIMPLE_MODIFY_STMT hanging underneath. */ |
e21aff8a SB |
570 | *tp = copy_node (assignment); |
571 | } | |
572 | else /* Else the RETURN_EXPR returns no value. */ | |
573 | { | |
574 | *tp = NULL; | |
cceb1885 | 575 | return (tree) (void *)1; |
e21aff8a | 576 | } |
d4e4baa9 | 577 | } |
110cfe1c JH |
578 | else if (TREE_CODE (*tp) == SSA_NAME) |
579 | { | |
580 | *tp = remap_ssa_name (*tp, id); | |
581 | *walk_subtrees = 0; | |
582 | return NULL; | |
583 | } | |
e21aff8a | 584 | |
d4e4baa9 AO |
585 | /* Local variables and labels need to be replaced by equivalent |
586 | variables. We don't want to copy static variables; there's only | |
587 | one of those, no matter how many times we inline the containing | |
5377d5ba | 588 | function. Similarly for globals from an outer function. */ |
ae2bcd98 | 589 | else if (lang_hooks.tree_inlining.auto_var_in_fn_p (*tp, fn)) |
d4e4baa9 AO |
590 | { |
591 | tree new_decl; | |
592 | ||
593 | /* Remap the declaration. */ | |
594 | new_decl = remap_decl (*tp, id); | |
1e128c5f | 595 | gcc_assert (new_decl); |
d4e4baa9 AO |
596 | /* Replace this variable with the copy. */ |
597 | STRIP_TYPE_NOPS (new_decl); | |
598 | *tp = new_decl; | |
e4cf29ae | 599 | *walk_subtrees = 0; |
d4e4baa9 | 600 | } |
6de9cd9a DN |
601 | else if (TREE_CODE (*tp) == STATEMENT_LIST) |
602 | copy_statement_list (tp); | |
d4e4baa9 | 603 | else if (TREE_CODE (*tp) == SAVE_EXPR) |
82c82743 | 604 | remap_save_expr (tp, id->decl_map, walk_subtrees); |
17acc01a JH |
605 | else if (TREE_CODE (*tp) == LABEL_DECL |
606 | && (! DECL_CONTEXT (*tp) | |
1b369fae | 607 | || decl_function_context (*tp) == id->src_fn)) |
e21aff8a | 608 | /* These may need to be remapped for EH handling. */ |
17acc01a | 609 | *tp = remap_decl (*tp, id); |
6de9cd9a DN |
610 | else if (TREE_CODE (*tp) == BIND_EXPR) |
611 | copy_bind_expr (tp, walk_subtrees, id); | |
3c2a7a6a RH |
612 | /* Types may need remapping as well. */ |
613 | else if (TYPE_P (*tp)) | |
614 | *tp = remap_type (*tp, id); | |
615 | ||
bb04998a RK |
616 | /* If this is a constant, we have to copy the node iff the type will be |
617 | remapped. copy_tree_r will not copy a constant. */ | |
3cf11075 | 618 | else if (CONSTANT_CLASS_P (*tp)) |
bb04998a RK |
619 | { |
620 | tree new_type = remap_type (TREE_TYPE (*tp), id); | |
621 | ||
622 | if (new_type == TREE_TYPE (*tp)) | |
623 | *walk_subtrees = 0; | |
624 | ||
625 | else if (TREE_CODE (*tp) == INTEGER_CST) | |
626 | *tp = build_int_cst_wide (new_type, TREE_INT_CST_LOW (*tp), | |
627 | TREE_INT_CST_HIGH (*tp)); | |
628 | else | |
629 | { | |
630 | *tp = copy_node (*tp); | |
631 | TREE_TYPE (*tp) = new_type; | |
632 | } | |
633 | } | |
634 | ||
d4e4baa9 AO |
635 | /* Otherwise, just copy the node. Note that copy_tree_r already |
636 | knows not to copy VAR_DECLs, etc., so this is safe. */ | |
637 | else | |
638 | { | |
e21aff8a SB |
639 | /* Here we handle trees that are not completely rewritten. |
640 | First we detect some inlining-induced bogosities for | |
641 | discarding. */ | |
07beea0d AH |
642 | if (TREE_CODE (*tp) == GIMPLE_MODIFY_STMT |
643 | && GIMPLE_STMT_OPERAND (*tp, 0) == GIMPLE_STMT_OPERAND (*tp, 1) | |
ae2bcd98 | 644 | && (lang_hooks.tree_inlining.auto_var_in_fn_p |
07beea0d | 645 | (GIMPLE_STMT_OPERAND (*tp, 0), fn))) |
d4e4baa9 AO |
646 | { |
647 | /* Some assignments VAR = VAR; don't generate any rtl code | |
648 | and thus don't count as variable modification. Avoid | |
649 | keeping bogosities like 0 = 0. */ | |
07beea0d | 650 | tree decl = GIMPLE_STMT_OPERAND (*tp, 0), value; |
6be42dd4 | 651 | tree *n; |
d4e4baa9 | 652 | |
6be42dd4 | 653 | n = (tree *) pointer_map_contains (id->decl_map, decl); |
d4e4baa9 AO |
654 | if (n) |
655 | { | |
6be42dd4 | 656 | value = *n; |
d4e4baa9 AO |
657 | STRIP_TYPE_NOPS (value); |
658 | if (TREE_CONSTANT (value) || TREE_READONLY_DECL_P (value)) | |
68594ce7 | 659 | { |
b03c0b93 | 660 | *tp = build_empty_stmt (); |
68594ce7 JM |
661 | return copy_body_r (tp, walk_subtrees, data); |
662 | } | |
d4e4baa9 AO |
663 | } |
664 | } | |
1b369fae | 665 | else if (TREE_CODE (*tp) == INDIRECT_REF) |
6de9cd9a DN |
666 | { |
667 | /* Get rid of *& from inline substitutions that can happen when a | |
668 | pointer argument is an ADDR_EXPR. */ | |
81cfbbc2 | 669 | tree decl = TREE_OPERAND (*tp, 0); |
6be42dd4 | 670 | tree *n; |
6de9cd9a | 671 | |
6be42dd4 | 672 | n = (tree *) pointer_map_contains (id->decl_map, decl); |
6de9cd9a DN |
673 | if (n) |
674 | { | |
5e13fdf7 | 675 | tree new; |
d84b37b0 | 676 | tree old; |
30d2e943 RG |
677 | /* If we happen to get an ADDR_EXPR in n->value, strip |
678 | it manually here as we'll eventually get ADDR_EXPRs | |
679 | which lie about their types pointed to. In this case | |
680 | build_fold_indirect_ref wouldn't strip the INDIRECT_REF, | |
095ecc24 RG |
681 | but we absolutely rely on that. As fold_indirect_ref |
682 | does other useful transformations, try that first, though. */ | |
6be42dd4 RG |
683 | tree type = TREE_TYPE (TREE_TYPE (*n)); |
684 | new = unshare_expr (*n); | |
d84b37b0 | 685 | old = *tp; |
5e13fdf7 | 686 | *tp = fold_indirect_ref_1 (type, new); |
095ecc24 RG |
687 | if (! *tp) |
688 | { | |
5e13fdf7 JH |
689 | if (TREE_CODE (new) == ADDR_EXPR) |
690 | *tp = TREE_OPERAND (new, 0); | |
095ecc24 | 691 | else |
d84b37b0 AP |
692 | { |
693 | *tp = build1 (INDIRECT_REF, type, new); | |
694 | TREE_THIS_VOLATILE (*tp) = TREE_THIS_VOLATILE (old); | |
695 | } | |
095ecc24 | 696 | } |
81cfbbc2 JH |
697 | *walk_subtrees = 0; |
698 | return NULL; | |
68594ce7 JM |
699 | } |
700 | } | |
701 | ||
e21aff8a SB |
702 | /* Here is the "usual case". Copy this tree node, and then |
703 | tweak some special cases. */ | |
1b369fae | 704 | copy_tree_r (tp, walk_subtrees, NULL); |
110cfe1c JH |
705 | |
706 | /* Global variables we didn't seen yet needs to go into referenced | |
707 | vars. */ | |
708 | if (gimple_in_ssa_p (cfun) && TREE_CODE (*tp) == VAR_DECL) | |
709 | add_referenced_var (*tp); | |
19734dd8 | 710 | |
acb8f212 JH |
711 | /* If EXPR has block defined, map it to newly constructed block. |
712 | When inlining we want EXPRs without block appear in the block | |
713 | of function call. */ | |
07beea0d | 714 | if (EXPR_P (*tp) || GIMPLE_STMT_P (*tp)) |
acb8f212 JH |
715 | { |
716 | new_block = id->block; | |
717 | if (TREE_BLOCK (*tp)) | |
718 | { | |
6be42dd4 RG |
719 | tree *n; |
720 | n = (tree *) pointer_map_contains (id->decl_map, | |
721 | TREE_BLOCK (*tp)); | |
acb8f212 | 722 | gcc_assert (n); |
6be42dd4 | 723 | new_block = *n; |
acb8f212 JH |
724 | } |
725 | TREE_BLOCK (*tp) = new_block; | |
726 | } | |
68594ce7 | 727 | |
e0704a46 | 728 | if (TREE_CODE (*tp) == RESX_EXPR && id->eh_region_offset) |
e21aff8a SB |
729 | TREE_OPERAND (*tp, 0) = |
730 | build_int_cst | |
731 | (NULL_TREE, | |
732 | id->eh_region_offset + TREE_INT_CST_LOW (TREE_OPERAND (*tp, 0))); | |
18c6ada9 | 733 | |
6f719560 | 734 | if (!GIMPLE_TUPLE_P (*tp) && TREE_CODE (*tp) != OMP_CLAUSE) |
07beea0d | 735 | TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id); |
3c2a7a6a | 736 | |
68594ce7 JM |
737 | /* The copied TARGET_EXPR has never been expanded, even if the |
738 | original node was expanded already. */ | |
739 | if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3)) | |
740 | { | |
741 | TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3); | |
742 | TREE_OPERAND (*tp, 3) = NULL_TREE; | |
743 | } | |
84cce55d RH |
744 | |
745 | /* Variable substitution need not be simple. In particular, the | |
746 | INDIRECT_REF substitution above. Make sure that TREE_CONSTANT | |
747 | and friends are up-to-date. */ | |
748 | else if (TREE_CODE (*tp) == ADDR_EXPR) | |
749 | { | |
750 | walk_tree (&TREE_OPERAND (*tp, 0), copy_body_r, id, NULL); | |
8e85fd14 RG |
751 | /* Handle the case where we substituted an INDIRECT_REF |
752 | into the operand of the ADDR_EXPR. */ | |
753 | if (TREE_CODE (TREE_OPERAND (*tp, 0)) == INDIRECT_REF) | |
754 | *tp = TREE_OPERAND (TREE_OPERAND (*tp, 0), 0); | |
755 | else | |
756 | recompute_tree_invariant_for_addr_expr (*tp); | |
84cce55d RH |
757 | *walk_subtrees = 0; |
758 | } | |
d4e4baa9 AO |
759 | } |
760 | ||
761 | /* Keep iterating. */ | |
762 | return NULL_TREE; | |
763 | } | |
764 | ||
e21aff8a SB |
765 | /* Copy basic block, scale profile accordingly. Edges will be taken care of |
766 | later */ | |
767 | ||
768 | static basic_block | |
1b369fae | 769 | copy_bb (copy_body_data *id, basic_block bb, int frequency_scale, int count_scale) |
e21aff8a SB |
770 | { |
771 | block_stmt_iterator bsi, copy_bsi; | |
772 | basic_block copy_basic_block; | |
773 | ||
774 | /* create_basic_block() will append every new block to | |
775 | basic_block_info automatically. */ | |
cceb1885 GDR |
776 | copy_basic_block = create_basic_block (NULL, (void *) 0, |
777 | (basic_block) bb->prev_bb->aux); | |
e21aff8a | 778 | copy_basic_block->count = bb->count * count_scale / REG_BR_PROB_BASE; |
45a80bb9 JH |
779 | |
780 | /* We are going to rebuild frequencies from scratch. These values have just | |
781 | small importance to drive canonicalize_loop_headers. */ | |
782 | copy_basic_block->frequency = ((gcov_type)bb->frequency | |
e21aff8a | 783 | * frequency_scale / REG_BR_PROB_BASE); |
45a80bb9 JH |
784 | if (copy_basic_block->frequency > BB_FREQ_MAX) |
785 | copy_basic_block->frequency = BB_FREQ_MAX; | |
e21aff8a SB |
786 | copy_bsi = bsi_start (copy_basic_block); |
787 | ||
788 | for (bsi = bsi_start (bb); | |
789 | !bsi_end_p (bsi); bsi_next (&bsi)) | |
790 | { | |
791 | tree stmt = bsi_stmt (bsi); | |
792 | tree orig_stmt = stmt; | |
793 | ||
794 | walk_tree (&stmt, copy_body_r, id, NULL); | |
795 | ||
796 | /* RETURN_EXPR might be removed, | |
797 | this is signalled by making stmt pointer NULL. */ | |
798 | if (stmt) | |
799 | { | |
e0704a46 | 800 | tree call, decl; |
2b65dae5 | 801 | |
6946b3f7 JH |
802 | gimple_duplicate_stmt_histograms (cfun, stmt, id->src_cfun, orig_stmt); |
803 | ||
2b65dae5 RG |
804 | /* With return slot optimization we can end up with |
805 | non-gimple (foo *)&this->m, fix that here. */ | |
07beea0d AH |
806 | if (TREE_CODE (stmt) == GIMPLE_MODIFY_STMT |
807 | && TREE_CODE (GIMPLE_STMT_OPERAND (stmt, 1)) == NOP_EXPR | |
808 | && !is_gimple_val (TREE_OPERAND (GIMPLE_STMT_OPERAND (stmt, 1), 0))) | |
2b65dae5 RG |
809 | gimplify_stmt (&stmt); |
810 | ||
e21aff8a | 811 | bsi_insert_after (©_bsi, stmt, BSI_NEW_STMT); |
110cfe1c JH |
812 | |
813 | /* Process new statement. gimplify_stmt possibly turned statement | |
814 | into multiple statements, we need to process all of them. */ | |
815 | while (!bsi_end_p (copy_bsi)) | |
e0704a46 | 816 | { |
110cfe1c JH |
817 | stmt = bsi_stmt (copy_bsi); |
818 | call = get_call_expr_in (stmt); | |
b8a00a4d JH |
819 | |
820 | /* Statements produced by inlining can be unfolded, especially | |
821 | when we constant propagated some operands. We can't fold | |
822 | them right now for two reasons: | |
823 | 1) folding require SSA_NAME_DEF_STMTs to be correct | |
824 | 2) we can't change function calls to builtins. | |
825 | So we just mark statement for later folding. We mark | |
826 | all new statements, instead just statements that has changed | |
827 | by some nontrivial substitution so even statements made | |
828 | foldable indirectly are updated. If this turns out to be | |
829 | expensive, copy_body can be told to watch for nontrivial | |
830 | changes. */ | |
831 | if (id->statements_to_fold) | |
832 | pointer_set_insert (id->statements_to_fold, stmt); | |
110cfe1c JH |
833 | /* We're duplicating a CALL_EXPR. Find any corresponding |
834 | callgraph edges and update or duplicate them. */ | |
835 | if (call && (decl = get_callee_fndecl (call))) | |
e0704a46 | 836 | { |
110cfe1c JH |
837 | struct cgraph_node *node; |
838 | struct cgraph_edge *edge; | |
839 | ||
840 | switch (id->transform_call_graph_edges) | |
ea99e0be | 841 | { |
110cfe1c JH |
842 | case CB_CGE_DUPLICATE: |
843 | edge = cgraph_edge (id->src_node, orig_stmt); | |
844 | if (edge) | |
845 | cgraph_clone_edge (edge, id->dst_node, stmt, | |
45a80bb9 | 846 | REG_BR_PROB_BASE, 1, edge->frequency, true); |
110cfe1c JH |
847 | break; |
848 | ||
849 | case CB_CGE_MOVE_CLONES: | |
850 | for (node = id->dst_node->next_clone; | |
851 | node; | |
852 | node = node->next_clone) | |
853 | { | |
854 | edge = cgraph_edge (node, orig_stmt); | |
855 | gcc_assert (edge); | |
856 | cgraph_set_call_stmt (edge, stmt); | |
857 | } | |
858 | /* FALLTHRU */ | |
859 | ||
860 | case CB_CGE_MOVE: | |
861 | edge = cgraph_edge (id->dst_node, orig_stmt); | |
862 | if (edge) | |
863 | cgraph_set_call_stmt (edge, stmt); | |
864 | break; | |
865 | ||
866 | default: | |
867 | gcc_unreachable (); | |
1b369fae | 868 | } |
110cfe1c JH |
869 | } |
870 | /* If you think we can abort here, you are wrong. | |
871 | There is no region 0 in tree land. */ | |
872 | gcc_assert (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) | |
873 | != 0); | |
1b369fae | 874 | |
2a025b54 JH |
875 | if (tree_could_throw_p (stmt) |
876 | /* When we are cloning for inlining, we are supposed to | |
877 | construct a clone that calls precisely the same functions | |
878 | as original. However IPA optimizers might've proved | |
879 | earlier some function calls as non-trapping that might | |
880 | render some basic blocks dead that might become | |
881 | unreachable. | |
882 | ||
883 | We can't update SSA with unreachable blocks in CFG and thus | |
884 | we prevent the scenario by preserving even the "dead" eh | |
885 | edges until the point they are later removed by | |
886 | fixup_cfg pass. */ | |
887 | || (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES | |
888 | && lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) > 0)) | |
110cfe1c JH |
889 | { |
890 | int region = lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt); | |
891 | /* Add an entry for the copied tree in the EH hashtable. | |
892 | When cloning or versioning, use the hashtable in | |
893 | cfun, and just copy the EH number. When inlining, use the | |
894 | hashtable in the caller, and adjust the region number. */ | |
895 | if (region > 0) | |
896 | add_stmt_to_eh_region (stmt, region + id->eh_region_offset); | |
897 | ||
898 | /* If this tree doesn't have a region associated with it, | |
899 | and there is a "current region," | |
900 | then associate this tree with the current region | |
901 | and add edges associated with this region. */ | |
902 | if ((lookup_stmt_eh_region_fn (id->src_cfun, | |
903 | orig_stmt) <= 0 | |
904 | && id->eh_region > 0) | |
905 | && tree_could_throw_p (stmt)) | |
906 | add_stmt_to_eh_region (stmt, id->eh_region); | |
e0704a46 | 907 | } |
110cfe1c JH |
908 | if (gimple_in_ssa_p (cfun)) |
909 | { | |
910 | ssa_op_iter i; | |
911 | tree def; | |
e21aff8a | 912 | |
110cfe1c JH |
913 | find_new_referenced_vars (bsi_stmt_ptr (copy_bsi)); |
914 | FOR_EACH_SSA_TREE_OPERAND (def, stmt, i, SSA_OP_DEF) | |
915 | if (TREE_CODE (def) == SSA_NAME) | |
916 | SSA_NAME_DEF_STMT (def) = stmt; | |
917 | } | |
918 | bsi_next (©_bsi); | |
e21aff8a | 919 | } |
110cfe1c | 920 | copy_bsi = bsi_last (copy_basic_block); |
e21aff8a SB |
921 | } |
922 | } | |
923 | return copy_basic_block; | |
924 | } | |
925 | ||
110cfe1c JH |
926 | /* Inserting Single Entry Multiple Exit region in SSA form into code in SSA |
927 | form is quite easy, since dominator relationship for old basic blocks does | |
928 | not change. | |
929 | ||
930 | There is however exception where inlining might change dominator relation | |
931 | across EH edges from basic block within inlined functions destinating | |
5305a4cb | 932 | to landing pads in function we inline into. |
110cfe1c JH |
933 | |
934 | The function mark PHI_RESULT of such PHI nodes for renaming; it is | |
935 | safe the EH edges are abnormal and SSA_NAME_OCCURS_IN_ABNORMAL_PHI | |
936 | must be set. This means, that there will be no overlapping live ranges | |
937 | for the underlying symbol. | |
938 | ||
939 | This might change in future if we allow redirecting of EH edges and | |
940 | we might want to change way build CFG pre-inlining to include | |
941 | all the possible edges then. */ | |
942 | static void | |
943 | update_ssa_across_eh_edges (basic_block bb) | |
944 | { | |
945 | edge e; | |
946 | edge_iterator ei; | |
947 | ||
948 | FOR_EACH_EDGE (e, ei, bb->succs) | |
949 | if (!e->dest->aux | |
950 | || ((basic_block)e->dest->aux)->index == ENTRY_BLOCK) | |
951 | { | |
952 | tree phi; | |
953 | ||
954 | gcc_assert (e->flags & EDGE_EH); | |
955 | for (phi = phi_nodes (e->dest); phi; phi = PHI_CHAIN (phi)) | |
956 | { | |
957 | gcc_assert (SSA_NAME_OCCURS_IN_ABNORMAL_PHI | |
958 | (PHI_RESULT (phi))); | |
959 | mark_sym_for_renaming | |
960 | (SSA_NAME_VAR (PHI_RESULT (phi))); | |
961 | } | |
962 | } | |
963 | } | |
964 | ||
128a79fb KH |
965 | /* Copy edges from BB into its copy constructed earlier, scale profile |
966 | accordingly. Edges will be taken care of later. Assume aux | |
967 | pointers to point to the copies of each BB. */ | |
e21aff8a SB |
968 | static void |
969 | copy_edges_for_bb (basic_block bb, int count_scale) | |
970 | { | |
cceb1885 | 971 | basic_block new_bb = (basic_block) bb->aux; |
e21aff8a SB |
972 | edge_iterator ei; |
973 | edge old_edge; | |
974 | block_stmt_iterator bsi; | |
975 | int flags; | |
976 | ||
977 | /* Use the indices from the original blocks to create edges for the | |
978 | new ones. */ | |
979 | FOR_EACH_EDGE (old_edge, ei, bb->succs) | |
e0704a46 JH |
980 | if (!(old_edge->flags & EDGE_EH)) |
981 | { | |
982 | edge new; | |
e21aff8a | 983 | |
e0704a46 | 984 | flags = old_edge->flags; |
e21aff8a | 985 | |
e0704a46 JH |
986 | /* Return edges do get a FALLTHRU flag when the get inlined. */ |
987 | if (old_edge->dest->index == EXIT_BLOCK && !old_edge->flags | |
988 | && old_edge->dest->aux != EXIT_BLOCK_PTR) | |
989 | flags |= EDGE_FALLTHRU; | |
cceb1885 | 990 | new = make_edge (new_bb, (basic_block) old_edge->dest->aux, flags); |
e0704a46 JH |
991 | new->count = old_edge->count * count_scale / REG_BR_PROB_BASE; |
992 | new->probability = old_edge->probability; | |
993 | } | |
e21aff8a SB |
994 | |
995 | if (bb->index == ENTRY_BLOCK || bb->index == EXIT_BLOCK) | |
996 | return; | |
997 | ||
e21aff8a SB |
998 | for (bsi = bsi_start (new_bb); !bsi_end_p (bsi);) |
999 | { | |
1000 | tree copy_stmt; | |
1001 | ||
1002 | copy_stmt = bsi_stmt (bsi); | |
1003 | update_stmt (copy_stmt); | |
110cfe1c JH |
1004 | if (gimple_in_ssa_p (cfun)) |
1005 | mark_symbols_for_renaming (copy_stmt); | |
e21aff8a SB |
1006 | /* Do this before the possible split_block. */ |
1007 | bsi_next (&bsi); | |
1008 | ||
1009 | /* If this tree could throw an exception, there are two | |
1010 | cases where we need to add abnormal edge(s): the | |
1011 | tree wasn't in a region and there is a "current | |
1012 | region" in the caller; or the original tree had | |
1013 | EH edges. In both cases split the block after the tree, | |
1014 | and add abnormal edge(s) as needed; we need both | |
1015 | those from the callee and the caller. | |
1016 | We check whether the copy can throw, because the const | |
1017 | propagation can change an INDIRECT_REF which throws | |
1018 | into a COMPONENT_REF which doesn't. If the copy | |
1019 | can throw, the original could also throw. */ | |
1020 | ||
e0704a46 | 1021 | if (tree_can_throw_internal (copy_stmt)) |
e21aff8a SB |
1022 | { |
1023 | if (!bsi_end_p (bsi)) | |
1024 | /* Note that bb's predecessor edges aren't necessarily | |
1025 | right at this point; split_block doesn't care. */ | |
1026 | { | |
1027 | edge e = split_block (new_bb, copy_stmt); | |
110cfe1c | 1028 | |
e21aff8a | 1029 | new_bb = e->dest; |
110cfe1c | 1030 | new_bb->aux = e->src->aux; |
e21aff8a SB |
1031 | bsi = bsi_start (new_bb); |
1032 | } | |
1033 | ||
1034 | make_eh_edges (copy_stmt); | |
110cfe1c JH |
1035 | |
1036 | if (gimple_in_ssa_p (cfun)) | |
1037 | update_ssa_across_eh_edges (bb_for_stmt (copy_stmt)); | |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | /* Copy the PHIs. All blocks and edges are copied, some blocks | |
1043 | was possibly split and new outgoing EH edges inserted. | |
1044 | BB points to the block of original function and AUX pointers links | |
1045 | the original and newly copied blocks. */ | |
1046 | ||
1047 | static void | |
1048 | copy_phis_for_bb (basic_block bb, copy_body_data *id) | |
1049 | { | |
1050 | basic_block new_bb = bb->aux; | |
1051 | edge_iterator ei; | |
1052 | tree phi; | |
1053 | ||
1054 | for (phi = phi_nodes (bb); phi; phi = PHI_CHAIN (phi)) | |
1055 | { | |
1056 | tree res = PHI_RESULT (phi); | |
1057 | tree new_res = res; | |
1058 | tree new_phi; | |
1059 | edge new_edge; | |
1060 | ||
1061 | if (is_gimple_reg (res)) | |
1062 | { | |
1063 | walk_tree (&new_res, copy_body_r, id, NULL); | |
1064 | SSA_NAME_DEF_STMT (new_res) | |
1065 | = new_phi = create_phi_node (new_res, new_bb); | |
1066 | FOR_EACH_EDGE (new_edge, ei, new_bb->preds) | |
1067 | { | |
1068 | edge old_edge = find_edge (new_edge->src->aux, bb); | |
1069 | tree arg = PHI_ARG_DEF_FROM_EDGE (phi, old_edge); | |
1070 | tree new_arg = arg; | |
1071 | ||
1072 | walk_tree (&new_arg, copy_body_r, id, NULL); | |
1073 | gcc_assert (new_arg); | |
1074 | add_phi_arg (new_phi, new_arg, new_edge); | |
1075 | } | |
e21aff8a SB |
1076 | } |
1077 | } | |
1078 | } | |
1079 | ||
1080 | /* Wrapper for remap_decl so it can be used as a callback. */ | |
1081 | static tree | |
1082 | remap_decl_1 (tree decl, void *data) | |
1083 | { | |
1b369fae | 1084 | return remap_decl (decl, (copy_body_data *) data); |
e21aff8a SB |
1085 | } |
1086 | ||
110cfe1c JH |
1087 | /* Build struct function and associated datastructures for the new clone |
1088 | NEW_FNDECL to be build. CALLEE_FNDECL is the original */ | |
1089 | ||
1090 | static void | |
1091 | initialize_cfun (tree new_fndecl, tree callee_fndecl, gcov_type count, | |
1092 | int frequency) | |
1093 | { | |
1094 | struct function *new_cfun | |
1095 | = (struct function *) ggc_alloc_cleared (sizeof (struct function)); | |
1096 | struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl); | |
1097 | int count_scale, frequency_scale; | |
1098 | ||
1099 | if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count) | |
1100 | count_scale = (REG_BR_PROB_BASE * count | |
1101 | / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count); | |
1102 | else | |
1103 | count_scale = 1; | |
1104 | ||
1105 | if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency) | |
1106 | frequency_scale = (REG_BR_PROB_BASE * frequency | |
1107 | / | |
1108 | ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency); | |
1109 | else | |
1110 | frequency_scale = count_scale; | |
1111 | ||
1112 | /* Register specific tree functions. */ | |
1113 | tree_register_cfg_hooks (); | |
1114 | *new_cfun = *DECL_STRUCT_FUNCTION (callee_fndecl); | |
3e87758a | 1115 | new_cfun->funcdef_no = get_next_funcdef_no (); |
110cfe1c JH |
1116 | VALUE_HISTOGRAMS (new_cfun) = NULL; |
1117 | new_cfun->unexpanded_var_list = NULL; | |
1118 | new_cfun->cfg = NULL; | |
1119 | new_cfun->decl = new_fndecl /*= copy_node (callee_fndecl)*/; | |
110cfe1c JH |
1120 | DECL_STRUCT_FUNCTION (new_fndecl) = new_cfun; |
1121 | push_cfun (new_cfun); | |
1122 | init_empty_tree_cfg (); | |
1123 | ||
1124 | ENTRY_BLOCK_PTR->count = | |
1125 | (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale / | |
1126 | REG_BR_PROB_BASE); | |
1127 | ENTRY_BLOCK_PTR->frequency = | |
1128 | (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency * | |
1129 | frequency_scale / REG_BR_PROB_BASE); | |
1130 | EXIT_BLOCK_PTR->count = | |
1131 | (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale / | |
1132 | REG_BR_PROB_BASE); | |
1133 | EXIT_BLOCK_PTR->frequency = | |
1134 | (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency * | |
1135 | frequency_scale / REG_BR_PROB_BASE); | |
1136 | if (src_cfun->eh) | |
1137 | init_eh_for_function (); | |
1138 | ||
1139 | if (src_cfun->gimple_df) | |
1140 | { | |
1141 | init_tree_ssa (); | |
1142 | cfun->gimple_df->in_ssa_p = true; | |
1143 | init_ssa_operands (); | |
1144 | } | |
1145 | pop_cfun (); | |
1146 | } | |
1147 | ||
e21aff8a SB |
1148 | /* Make a copy of the body of FN so that it can be inserted inline in |
1149 | another function. Walks FN via CFG, returns new fndecl. */ | |
1150 | ||
1151 | static tree | |
1b369fae | 1152 | copy_cfg_body (copy_body_data * id, gcov_type count, int frequency, |
e21aff8a SB |
1153 | basic_block entry_block_map, basic_block exit_block_map) |
1154 | { | |
1b369fae | 1155 | tree callee_fndecl = id->src_fn; |
e21aff8a | 1156 | /* Original cfun for the callee, doesn't change. */ |
1b369fae | 1157 | struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl); |
110cfe1c | 1158 | struct function *cfun_to_copy; |
e21aff8a SB |
1159 | basic_block bb; |
1160 | tree new_fndecl = NULL; | |
e21aff8a | 1161 | int count_scale, frequency_scale; |
110cfe1c | 1162 | int last; |
e21aff8a | 1163 | |
1b369fae | 1164 | if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count) |
e21aff8a | 1165 | count_scale = (REG_BR_PROB_BASE * count |
1b369fae | 1166 | / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count); |
e21aff8a SB |
1167 | else |
1168 | count_scale = 1; | |
1169 | ||
1b369fae | 1170 | if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency) |
e21aff8a SB |
1171 | frequency_scale = (REG_BR_PROB_BASE * frequency |
1172 | / | |
1b369fae | 1173 | ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency); |
e21aff8a SB |
1174 | else |
1175 | frequency_scale = count_scale; | |
1176 | ||
1177 | /* Register specific tree functions. */ | |
1178 | tree_register_cfg_hooks (); | |
1179 | ||
1180 | /* Must have a CFG here at this point. */ | |
1181 | gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION | |
1182 | (DECL_STRUCT_FUNCTION (callee_fndecl))); | |
1183 | ||
110cfe1c JH |
1184 | cfun_to_copy = id->src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl); |
1185 | ||
e21aff8a SB |
1186 | |
1187 | ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = entry_block_map; | |
1188 | EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = exit_block_map; | |
110cfe1c JH |
1189 | entry_block_map->aux = ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy); |
1190 | exit_block_map->aux = EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy); | |
e21aff8a | 1191 | |
e21aff8a SB |
1192 | /* Duplicate any exception-handling regions. */ |
1193 | if (cfun->eh) | |
1194 | { | |
1b369fae | 1195 | id->eh_region_offset |
fad41cd7 RH |
1196 | = duplicate_eh_regions (cfun_to_copy, remap_decl_1, id, |
1197 | 0, id->eh_region); | |
e21aff8a SB |
1198 | } |
1199 | /* Use aux pointers to map the original blocks to copy. */ | |
1200 | FOR_EACH_BB_FN (bb, cfun_to_copy) | |
110cfe1c JH |
1201 | { |
1202 | basic_block new = copy_bb (id, bb, frequency_scale, count_scale); | |
1203 | bb->aux = new; | |
1204 | new->aux = bb; | |
1205 | } | |
1206 | ||
7c57be85 | 1207 | last = last_basic_block; |
e21aff8a SB |
1208 | /* Now that we've duplicated the blocks, duplicate their edges. */ |
1209 | FOR_ALL_BB_FN (bb, cfun_to_copy) | |
1210 | copy_edges_for_bb (bb, count_scale); | |
110cfe1c JH |
1211 | if (gimple_in_ssa_p (cfun)) |
1212 | FOR_ALL_BB_FN (bb, cfun_to_copy) | |
1213 | copy_phis_for_bb (bb, id); | |
e21aff8a | 1214 | FOR_ALL_BB_FN (bb, cfun_to_copy) |
110cfe1c JH |
1215 | { |
1216 | ((basic_block)bb->aux)->aux = NULL; | |
1217 | bb->aux = NULL; | |
1218 | } | |
1219 | /* Zero out AUX fields of newly created block during EH edge | |
1220 | insertion. */ | |
7c57be85 | 1221 | for (; last < last_basic_block; last++) |
110cfe1c JH |
1222 | BASIC_BLOCK (last)->aux = NULL; |
1223 | entry_block_map->aux = NULL; | |
1224 | exit_block_map->aux = NULL; | |
e21aff8a SB |
1225 | |
1226 | return new_fndecl; | |
1227 | } | |
1228 | ||
d4e4baa9 AO |
1229 | /* Make a copy of the body of FN so that it can be inserted inline in |
1230 | another function. */ | |
1231 | ||
1232 | static tree | |
1b369fae | 1233 | copy_generic_body (copy_body_data *id) |
d4e4baa9 AO |
1234 | { |
1235 | tree body; | |
1b369fae | 1236 | tree fndecl = id->src_fn; |
d4e4baa9 | 1237 | |
e21aff8a | 1238 | body = DECL_SAVED_TREE (fndecl); |
d4e4baa9 AO |
1239 | walk_tree (&body, copy_body_r, id, NULL); |
1240 | ||
1241 | return body; | |
1242 | } | |
1243 | ||
e21aff8a | 1244 | static tree |
1b369fae | 1245 | copy_body (copy_body_data *id, gcov_type count, int frequency, |
e21aff8a SB |
1246 | basic_block entry_block_map, basic_block exit_block_map) |
1247 | { | |
1b369fae | 1248 | tree fndecl = id->src_fn; |
e21aff8a SB |
1249 | tree body; |
1250 | ||
1251 | /* If this body has a CFG, walk CFG and copy. */ | |
1252 | gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION (DECL_STRUCT_FUNCTION (fndecl))); | |
1253 | body = copy_cfg_body (id, count, frequency, entry_block_map, exit_block_map); | |
1254 | ||
1255 | return body; | |
1256 | } | |
1257 | ||
04482133 AO |
1258 | /* Return true if VALUE is an ADDR_EXPR of an automatic variable |
1259 | defined in function FN, or of a data member thereof. */ | |
1260 | ||
1261 | static bool | |
1262 | self_inlining_addr_expr (tree value, tree fn) | |
1263 | { | |
1264 | tree var; | |
1265 | ||
1266 | if (TREE_CODE (value) != ADDR_EXPR) | |
1267 | return false; | |
1268 | ||
1269 | var = get_base_address (TREE_OPERAND (value, 0)); | |
e21aff8a | 1270 | |
04482133 AO |
1271 | return var && lang_hooks.tree_inlining.auto_var_in_fn_p (var, fn); |
1272 | } | |
1273 | ||
6de9cd9a | 1274 | static void |
1b369fae | 1275 | setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn, |
e21aff8a | 1276 | basic_block bb, tree *vars) |
6de9cd9a DN |
1277 | { |
1278 | tree init_stmt; | |
1279 | tree var; | |
e21aff8a | 1280 | tree var_sub; |
110cfe1c JH |
1281 | tree rhs = value ? fold_convert (TREE_TYPE (p), value) : NULL; |
1282 | tree def = (gimple_in_ssa_p (cfun) | |
1283 | ? gimple_default_def (id->src_cfun, p) : NULL); | |
6de9cd9a | 1284 | |
110cfe1c JH |
1285 | /* If the parameter is never assigned to, has no SSA_NAMEs created, |
1286 | we may not need to create a new variable here at all. Instead, we may | |
1287 | be able to just use the argument value. */ | |
6de9cd9a DN |
1288 | if (TREE_READONLY (p) |
1289 | && !TREE_ADDRESSABLE (p) | |
110cfe1c JH |
1290 | && value && !TREE_SIDE_EFFECTS (value) |
1291 | && !def) | |
6de9cd9a | 1292 | { |
84936f6f RH |
1293 | /* We may produce non-gimple trees by adding NOPs or introduce |
1294 | invalid sharing when operand is not really constant. | |
1295 | It is not big deal to prohibit constant propagation here as | |
1296 | we will constant propagate in DOM1 pass anyway. */ | |
1297 | if (is_gimple_min_invariant (value) | |
04482133 AO |
1298 | && lang_hooks.types_compatible_p (TREE_TYPE (value), TREE_TYPE (p)) |
1299 | /* We have to be very careful about ADDR_EXPR. Make sure | |
1300 | the base variable isn't a local variable of the inlined | |
1301 | function, e.g., when doing recursive inlining, direct or | |
1302 | mutually-recursive or whatever, which is why we don't | |
1303 | just test whether fn == current_function_decl. */ | |
1304 | && ! self_inlining_addr_expr (value, fn)) | |
6de9cd9a | 1305 | { |
6de9cd9a DN |
1306 | insert_decl_map (id, p, value); |
1307 | return; | |
1308 | } | |
1309 | } | |
1310 | ||
5377d5ba RK |
1311 | /* Make an equivalent VAR_DECL. Note that we must NOT remap the type |
1312 | here since the type of this decl must be visible to the calling | |
8c27b7d4 | 1313 | function. */ |
1b369fae | 1314 | var = copy_decl_to_var (p, id); |
110cfe1c JH |
1315 | if (gimple_in_ssa_p (cfun) && TREE_CODE (var) == VAR_DECL) |
1316 | { | |
1317 | get_var_ann (var); | |
1318 | add_referenced_var (var); | |
1319 | } | |
e21aff8a SB |
1320 | |
1321 | /* See if the frontend wants to pass this by invisible reference. If | |
1322 | so, our new VAR_DECL will have REFERENCE_TYPE, and we need to | |
1323 | replace uses of the PARM_DECL with dereferences. */ | |
1324 | if (TREE_TYPE (var) != TREE_TYPE (p) | |
1325 | && POINTER_TYPE_P (TREE_TYPE (var)) | |
1326 | && TREE_TYPE (TREE_TYPE (var)) == TREE_TYPE (p)) | |
1327 | { | |
1328 | insert_decl_map (id, var, var); | |
1329 | var_sub = build_fold_indirect_ref (var); | |
1330 | } | |
1331 | else | |
1332 | var_sub = var; | |
6de9cd9a | 1333 | |
6de9cd9a DN |
1334 | /* Register the VAR_DECL as the equivalent for the PARM_DECL; |
1335 | that way, when the PARM_DECL is encountered, it will be | |
1336 | automatically replaced by the VAR_DECL. */ | |
e21aff8a | 1337 | insert_decl_map (id, p, var_sub); |
6de9cd9a DN |
1338 | |
1339 | /* Declare this new variable. */ | |
1340 | TREE_CHAIN (var) = *vars; | |
1341 | *vars = var; | |
1342 | ||
1343 | /* Make gimplifier happy about this variable. */ | |
84936f6f | 1344 | DECL_SEEN_IN_BIND_EXPR_P (var) = 1; |
6de9cd9a DN |
1345 | |
1346 | /* Even if P was TREE_READONLY, the new VAR should not be. | |
1347 | In the original code, we would have constructed a | |
1348 | temporary, and then the function body would have never | |
1349 | changed the value of P. However, now, we will be | |
1350 | constructing VAR directly. The constructor body may | |
1351 | change its value multiple times as it is being | |
1352 | constructed. Therefore, it must not be TREE_READONLY; | |
1353 | the back-end assumes that TREE_READONLY variable is | |
1354 | assigned to only once. */ | |
1355 | if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p))) | |
1356 | TREE_READONLY (var) = 0; | |
1357 | ||
110cfe1c JH |
1358 | /* If there is no setup required and we are in SSA, take the easy route |
1359 | replacing all SSA names representing the function parameter by the | |
1360 | SSA name passed to function. | |
1361 | ||
1362 | We need to construct map for the variable anyway as it might be used | |
1363 | in different SSA names when parameter is set in function. | |
1364 | ||
1365 | FIXME: This usually kills the last connection in between inlined | |
1366 | function parameter and the actual value in debug info. Can we do | |
1367 | better here? If we just inserted the statement, copy propagation | |
1368 | would kill it anyway as it always did in older versions of GCC. | |
1369 | ||
1370 | We might want to introduce a notion that single SSA_NAME might | |
1371 | represent multiple variables for purposes of debugging. */ | |
1372 | if (gimple_in_ssa_p (cfun) && rhs && def && is_gimple_reg (p) | |
1373 | && (TREE_CODE (rhs) == SSA_NAME | |
9b718f81 JH |
1374 | || is_gimple_min_invariant (rhs)) |
1375 | && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (def)) | |
110cfe1c JH |
1376 | { |
1377 | insert_decl_map (id, def, rhs); | |
1378 | return; | |
1379 | } | |
1380 | ||
6de9cd9a DN |
1381 | /* Initialize this VAR_DECL from the equivalent argument. Convert |
1382 | the argument to the proper type in case it was promoted. */ | |
1383 | if (value) | |
1384 | { | |
e21aff8a | 1385 | block_stmt_iterator bsi = bsi_last (bb); |
6de9cd9a DN |
1386 | |
1387 | if (rhs == error_mark_node) | |
110cfe1c JH |
1388 | { |
1389 | insert_decl_map (id, p, var_sub); | |
1390 | return; | |
1391 | } | |
afe08db5 | 1392 | |
73dab33b | 1393 | STRIP_USELESS_TYPE_CONVERSION (rhs); |
6de9cd9a | 1394 | |
07beea0d | 1395 | /* We want to use GIMPLE_MODIFY_STMT, not INIT_EXPR here so that we |
6de9cd9a | 1396 | keep our trees in gimple form. */ |
110cfe1c JH |
1397 | if (def && gimple_in_ssa_p (cfun) && is_gimple_reg (p)) |
1398 | { | |
1399 | def = remap_ssa_name (def, id); | |
ebb07520 | 1400 | init_stmt = build_gimple_modify_stmt (def, rhs); |
110cfe1c JH |
1401 | SSA_NAME_DEF_STMT (def) = init_stmt; |
1402 | SSA_NAME_IS_DEFAULT_DEF (def) = 0; | |
1403 | set_default_def (var, NULL); | |
1404 | } | |
1405 | else | |
ebb07520 | 1406 | init_stmt = build_gimple_modify_stmt (var, rhs); |
6de9cd9a DN |
1407 | |
1408 | /* If we did not create a gimple value and we did not create a gimple | |
1409 | cast of a gimple value, then we will need to gimplify INIT_STMTS | |
1410 | at the end. Note that is_gimple_cast only checks the outer | |
128a79fb | 1411 | tree code, not its operand. Thus the explicit check that its |
6de9cd9a | 1412 | operand is a gimple value. */ |
b779a874 | 1413 | if ((!is_gimple_val (rhs) |
6de9cd9a DN |
1414 | && (!is_gimple_cast (rhs) |
1415 | || !is_gimple_val (TREE_OPERAND (rhs, 0)))) | |
b779a874 | 1416 | || !is_gimple_reg (var)) |
110cfe1c JH |
1417 | { |
1418 | tree_stmt_iterator i; | |
1419 | ||
1420 | push_gimplify_context (); | |
1421 | gimplify_stmt (&init_stmt); | |
1422 | if (gimple_in_ssa_p (cfun) | |
1423 | && init_stmt && TREE_CODE (init_stmt) == STATEMENT_LIST) | |
1424 | { | |
1425 | /* The replacement can expose previously unreferenced | |
1426 | variables. */ | |
1427 | for (i = tsi_start (init_stmt); !tsi_end_p (i); tsi_next (&i)) | |
1428 | find_new_referenced_vars (tsi_stmt_ptr (i)); | |
1429 | } | |
1430 | pop_gimplify_context (NULL); | |
1431 | } | |
52f66176 RK |
1432 | |
1433 | /* If VAR represents a zero-sized variable, it's possible that the | |
1434 | assignment statment may result in no gimple statements. */ | |
047f4b2c AP |
1435 | if (init_stmt) |
1436 | bsi_insert_after (&bsi, init_stmt, BSI_NEW_STMT); | |
110cfe1c JH |
1437 | if (gimple_in_ssa_p (cfun)) |
1438 | for (;!bsi_end_p (bsi); bsi_next (&bsi)) | |
1439 | mark_symbols_for_renaming (bsi_stmt (bsi)); | |
6de9cd9a DN |
1440 | } |
1441 | } | |
1442 | ||
d4e4baa9 | 1443 | /* Generate code to initialize the parameters of the function at the |
5039610b | 1444 | top of the stack in ID from the CALL_EXPR EXP. */ |
d4e4baa9 | 1445 | |
e21aff8a | 1446 | static void |
5039610b | 1447 | initialize_inlined_parameters (copy_body_data *id, tree exp, |
e21aff8a | 1448 | tree fn, basic_block bb) |
d4e4baa9 | 1449 | { |
d4e4baa9 AO |
1450 | tree parms; |
1451 | tree a; | |
1452 | tree p; | |
d436bff8 | 1453 | tree vars = NULL_TREE; |
d5123bae | 1454 | int argnum = 0; |
5039610b SL |
1455 | call_expr_arg_iterator iter; |
1456 | tree static_chain = CALL_EXPR_STATIC_CHAIN (exp); | |
d4e4baa9 AO |
1457 | |
1458 | /* Figure out what the parameters are. */ | |
18c6ada9 | 1459 | parms = DECL_ARGUMENTS (fn); |
d4e4baa9 | 1460 | |
d4e4baa9 AO |
1461 | /* Loop through the parameter declarations, replacing each with an |
1462 | equivalent VAR_DECL, appropriately initialized. */ | |
5039610b SL |
1463 | for (p = parms, a = first_call_expr_arg (exp, &iter); p; |
1464 | a = next_call_expr_arg (&iter), p = TREE_CHAIN (p)) | |
d4e4baa9 | 1465 | { |
d4e4baa9 AO |
1466 | tree value; |
1467 | ||
d5123bae MS |
1468 | ++argnum; |
1469 | ||
d4e4baa9 | 1470 | /* Find the initializer. */ |
ae2bcd98 | 1471 | value = lang_hooks.tree_inlining.convert_parm_for_inlining |
5039610b | 1472 | (p, a, fn, argnum); |
4838c5ee | 1473 | |
e21aff8a | 1474 | setup_one_parameter (id, p, value, fn, bb, &vars); |
6de9cd9a | 1475 | } |
4838c5ee | 1476 | |
6de9cd9a DN |
1477 | /* Initialize the static chain. */ |
1478 | p = DECL_STRUCT_FUNCTION (fn)->static_chain_decl; | |
ea99e0be | 1479 | gcc_assert (fn != current_function_decl); |
6de9cd9a DN |
1480 | if (p) |
1481 | { | |
1482 | /* No static chain? Seems like a bug in tree-nested.c. */ | |
1e128c5f | 1483 | gcc_assert (static_chain); |
4838c5ee | 1484 | |
e21aff8a | 1485 | setup_one_parameter (id, p, static_chain, fn, bb, &vars); |
4838c5ee AO |
1486 | } |
1487 | ||
e21aff8a | 1488 | declare_inline_vars (id->block, vars); |
d4e4baa9 AO |
1489 | } |
1490 | ||
e21aff8a SB |
1491 | /* Declare a return variable to replace the RESULT_DECL for the |
1492 | function we are calling. An appropriate DECL_STMT is returned. | |
1493 | The USE_STMT is filled to contain a use of the declaration to | |
1494 | indicate the return value of the function. | |
1495 | ||
110cfe1c JH |
1496 | RETURN_SLOT, if non-null is place where to store the result. It |
1497 | is set only for CALL_EXPR_RETURN_SLOT_OPT. MODIFY_DEST, if non-null, | |
1498 | was the LHS of the GIMPLE_MODIFY_STMT to which this call is the RHS. | |
7740f00d RH |
1499 | |
1500 | The return value is a (possibly null) value that is the result of the | |
1501 | function as seen by the callee. *USE_P is a (possibly null) value that | |
1502 | holds the result as seen by the caller. */ | |
d4e4baa9 | 1503 | |
d436bff8 | 1504 | static tree |
110cfe1c JH |
1505 | declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest, |
1506 | tree *use_p) | |
d4e4baa9 | 1507 | { |
1b369fae RH |
1508 | tree callee = id->src_fn; |
1509 | tree caller = id->dst_fn; | |
7740f00d RH |
1510 | tree result = DECL_RESULT (callee); |
1511 | tree callee_type = TREE_TYPE (result); | |
1512 | tree caller_type = TREE_TYPE (TREE_TYPE (callee)); | |
1513 | tree var, use; | |
d4e4baa9 AO |
1514 | |
1515 | /* We don't need to do anything for functions that don't return | |
1516 | anything. */ | |
7740f00d | 1517 | if (!result || VOID_TYPE_P (callee_type)) |
d4e4baa9 | 1518 | { |
6de9cd9a | 1519 | *use_p = NULL_TREE; |
d4e4baa9 AO |
1520 | return NULL_TREE; |
1521 | } | |
1522 | ||
cc77ae10 | 1523 | /* If there was a return slot, then the return value is the |
7740f00d | 1524 | dereferenced address of that object. */ |
110cfe1c | 1525 | if (return_slot) |
7740f00d | 1526 | { |
110cfe1c | 1527 | /* The front end shouldn't have used both return_slot and |
7740f00d | 1528 | a modify expression. */ |
1e128c5f | 1529 | gcc_assert (!modify_dest); |
cc77ae10 | 1530 | if (DECL_BY_REFERENCE (result)) |
110cfe1c JH |
1531 | { |
1532 | tree return_slot_addr = build_fold_addr_expr (return_slot); | |
1533 | STRIP_USELESS_TYPE_CONVERSION (return_slot_addr); | |
1534 | ||
1535 | /* We are going to construct *&return_slot and we can't do that | |
1536 | for variables believed to be not addressable. | |
1537 | ||
1538 | FIXME: This check possibly can match, because values returned | |
1539 | via return slot optimization are not believed to have address | |
1540 | taken by alias analysis. */ | |
1541 | gcc_assert (TREE_CODE (return_slot) != SSA_NAME); | |
1542 | if (gimple_in_ssa_p (cfun)) | |
1543 | { | |
1544 | HOST_WIDE_INT bitsize; | |
1545 | HOST_WIDE_INT bitpos; | |
1546 | tree offset; | |
1547 | enum machine_mode mode; | |
1548 | int unsignedp; | |
1549 | int volatilep; | |
1550 | tree base; | |
1551 | base = get_inner_reference (return_slot, &bitsize, &bitpos, | |
1552 | &offset, | |
1553 | &mode, &unsignedp, &volatilep, | |
1554 | false); | |
1555 | if (TREE_CODE (base) == INDIRECT_REF) | |
1556 | base = TREE_OPERAND (base, 0); | |
1557 | if (TREE_CODE (base) == SSA_NAME) | |
1558 | base = SSA_NAME_VAR (base); | |
1559 | mark_sym_for_renaming (base); | |
1560 | } | |
1561 | var = return_slot_addr; | |
1562 | } | |
cc77ae10 | 1563 | else |
110cfe1c JH |
1564 | { |
1565 | var = return_slot; | |
1566 | gcc_assert (TREE_CODE (var) != SSA_NAME); | |
1567 | } | |
0890b981 AP |
1568 | if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE |
1569 | || TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE) | |
1570 | && !DECL_GIMPLE_REG_P (result) | |
22918034 | 1571 | && DECL_P (var)) |
0890b981 | 1572 | DECL_GIMPLE_REG_P (var) = 0; |
7740f00d RH |
1573 | use = NULL; |
1574 | goto done; | |
1575 | } | |
1576 | ||
1577 | /* All types requiring non-trivial constructors should have been handled. */ | |
1e128c5f | 1578 | gcc_assert (!TREE_ADDRESSABLE (callee_type)); |
7740f00d RH |
1579 | |
1580 | /* Attempt to avoid creating a new temporary variable. */ | |
110cfe1c JH |
1581 | if (modify_dest |
1582 | && TREE_CODE (modify_dest) != SSA_NAME) | |
7740f00d RH |
1583 | { |
1584 | bool use_it = false; | |
1585 | ||
1586 | /* We can't use MODIFY_DEST if there's type promotion involved. */ | |
1587 | if (!lang_hooks.types_compatible_p (caller_type, callee_type)) | |
1588 | use_it = false; | |
1589 | ||
1590 | /* ??? If we're assigning to a variable sized type, then we must | |
1591 | reuse the destination variable, because we've no good way to | |
1592 | create variable sized temporaries at this point. */ | |
1593 | else if (TREE_CODE (TYPE_SIZE_UNIT (caller_type)) != INTEGER_CST) | |
1594 | use_it = true; | |
1595 | ||
1596 | /* If the callee cannot possibly modify MODIFY_DEST, then we can | |
1597 | reuse it as the result of the call directly. Don't do this if | |
1598 | it would promote MODIFY_DEST to addressable. */ | |
e2f9fe42 RH |
1599 | else if (TREE_ADDRESSABLE (result)) |
1600 | use_it = false; | |
1601 | else | |
1602 | { | |
1603 | tree base_m = get_base_address (modify_dest); | |
1604 | ||
1605 | /* If the base isn't a decl, then it's a pointer, and we don't | |
1606 | know where that's going to go. */ | |
1607 | if (!DECL_P (base_m)) | |
1608 | use_it = false; | |
1609 | else if (is_global_var (base_m)) | |
1610 | use_it = false; | |
0890b981 AP |
1611 | else if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE |
1612 | || TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE) | |
1613 | && !DECL_GIMPLE_REG_P (result) | |
1614 | && DECL_GIMPLE_REG_P (base_m)) | |
1d327c16 | 1615 | use_it = false; |
e2f9fe42 RH |
1616 | else if (!TREE_ADDRESSABLE (base_m)) |
1617 | use_it = true; | |
1618 | } | |
7740f00d RH |
1619 | |
1620 | if (use_it) | |
1621 | { | |
1622 | var = modify_dest; | |
1623 | use = NULL; | |
1624 | goto done; | |
1625 | } | |
1626 | } | |
1627 | ||
1e128c5f | 1628 | gcc_assert (TREE_CODE (TYPE_SIZE_UNIT (callee_type)) == INTEGER_CST); |
7740f00d | 1629 | |
c08cd4c1 | 1630 | var = copy_result_decl_to_var (result, id); |
110cfe1c JH |
1631 | if (gimple_in_ssa_p (cfun)) |
1632 | { | |
1633 | get_var_ann (var); | |
1634 | add_referenced_var (var); | |
1635 | } | |
e21aff8a | 1636 | |
7740f00d RH |
1637 | DECL_SEEN_IN_BIND_EXPR_P (var) = 1; |
1638 | DECL_STRUCT_FUNCTION (caller)->unexpanded_var_list | |
1639 | = tree_cons (NULL_TREE, var, | |
1640 | DECL_STRUCT_FUNCTION (caller)->unexpanded_var_list); | |
1641 | ||
6de9cd9a | 1642 | /* Do not have the rest of GCC warn about this variable as it should |
471854f8 | 1643 | not be visible to the user. */ |
6de9cd9a | 1644 | TREE_NO_WARNING (var) = 1; |
d4e4baa9 | 1645 | |
c08cd4c1 JM |
1646 | declare_inline_vars (id->block, var); |
1647 | ||
7740f00d RH |
1648 | /* Build the use expr. If the return type of the function was |
1649 | promoted, convert it back to the expected type. */ | |
1650 | use = var; | |
1651 | if (!lang_hooks.types_compatible_p (TREE_TYPE (var), caller_type)) | |
1652 | use = fold_convert (caller_type, var); | |
73dab33b AP |
1653 | |
1654 | STRIP_USELESS_TYPE_CONVERSION (use); | |
7740f00d | 1655 | |
c08cd4c1 JM |
1656 | if (DECL_BY_REFERENCE (result)) |
1657 | var = build_fold_addr_expr (var); | |
1658 | ||
7740f00d | 1659 | done: |
d4e4baa9 AO |
1660 | /* Register the VAR_DECL as the equivalent for the RESULT_DECL; that |
1661 | way, when the RESULT_DECL is encountered, it will be | |
1662 | automatically replaced by the VAR_DECL. */ | |
5e20bdd7 | 1663 | insert_decl_map (id, result, var); |
d4e4baa9 | 1664 | |
6de9cd9a DN |
1665 | /* Remember this so we can ignore it in remap_decls. */ |
1666 | id->retvar = var; | |
1667 | ||
7740f00d RH |
1668 | *use_p = use; |
1669 | return var; | |
d4e4baa9 AO |
1670 | } |
1671 | ||
0e9e1e0a | 1672 | /* Returns nonzero if a function can be inlined as a tree. */ |
4838c5ee | 1673 | |
b3c3af2f SB |
1674 | bool |
1675 | tree_inlinable_function_p (tree fn) | |
4838c5ee | 1676 | { |
b3c3af2f | 1677 | return inlinable_function_p (fn); |
4838c5ee AO |
1678 | } |
1679 | ||
f08545a8 | 1680 | static const char *inline_forbidden_reason; |
c986baf6 | 1681 | |
c986baf6 | 1682 | static tree |
f08545a8 | 1683 | inline_forbidden_p_1 (tree *nodep, int *walk_subtrees ATTRIBUTE_UNUSED, |
edeb3871 | 1684 | void *fnp) |
c986baf6 | 1685 | { |
f08545a8 | 1686 | tree node = *nodep; |
edeb3871 | 1687 | tree fn = (tree) fnp; |
f08545a8 | 1688 | tree t; |
c986baf6 | 1689 | |
f08545a8 JH |
1690 | switch (TREE_CODE (node)) |
1691 | { | |
1692 | case CALL_EXPR: | |
3197c4fd AS |
1693 | /* Refuse to inline alloca call unless user explicitly forced so as |
1694 | this may change program's memory overhead drastically when the | |
1695 | function using alloca is called in loop. In GCC present in | |
1696 | SPEC2000 inlining into schedule_block cause it to require 2GB of | |
1697 | RAM instead of 256MB. */ | |
f08545a8 JH |
1698 | if (alloca_call_p (node) |
1699 | && !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))) | |
1700 | { | |
ddd2d57e | 1701 | inline_forbidden_reason |
dee15844 | 1702 | = G_("function %q+F can never be inlined because it uses " |
ddd2d57e | 1703 | "alloca (override using the always_inline attribute)"); |
f08545a8 JH |
1704 | return node; |
1705 | } | |
1706 | t = get_callee_fndecl (node); | |
1707 | if (! t) | |
1708 | break; | |
84f5e1b1 | 1709 | |
f08545a8 JH |
1710 | /* We cannot inline functions that call setjmp. */ |
1711 | if (setjmp_call_p (t)) | |
1712 | { | |
ddd2d57e | 1713 | inline_forbidden_reason |
dee15844 | 1714 | = G_("function %q+F can never be inlined because it uses setjmp"); |
f08545a8 JH |
1715 | return node; |
1716 | } | |
1717 | ||
6de9cd9a | 1718 | if (DECL_BUILT_IN_CLASS (t) == BUILT_IN_NORMAL) |
3197c4fd | 1719 | switch (DECL_FUNCTION_CODE (t)) |
f08545a8 | 1720 | { |
3197c4fd AS |
1721 | /* We cannot inline functions that take a variable number of |
1722 | arguments. */ | |
1723 | case BUILT_IN_VA_START: | |
1724 | case BUILT_IN_STDARG_START: | |
1725 | case BUILT_IN_NEXT_ARG: | |
1726 | case BUILT_IN_VA_END: | |
6de9cd9a | 1727 | inline_forbidden_reason |
dee15844 | 1728 | = G_("function %q+F can never be inlined because it " |
6de9cd9a DN |
1729 | "uses variable argument lists"); |
1730 | return node; | |
1731 | ||
3197c4fd | 1732 | case BUILT_IN_LONGJMP: |
6de9cd9a DN |
1733 | /* We can't inline functions that call __builtin_longjmp at |
1734 | all. The non-local goto machinery really requires the | |
1735 | destination be in a different function. If we allow the | |
1736 | function calling __builtin_longjmp to be inlined into the | |
1737 | function calling __builtin_setjmp, Things will Go Awry. */ | |
1738 | inline_forbidden_reason | |
dee15844 | 1739 | = G_("function %q+F can never be inlined because " |
6de9cd9a DN |
1740 | "it uses setjmp-longjmp exception handling"); |
1741 | return node; | |
1742 | ||
1743 | case BUILT_IN_NONLOCAL_GOTO: | |
1744 | /* Similarly. */ | |
1745 | inline_forbidden_reason | |
dee15844 | 1746 | = G_("function %q+F can never be inlined because " |
6de9cd9a DN |
1747 | "it uses non-local goto"); |
1748 | return node; | |
f08545a8 | 1749 | |
4b284111 JJ |
1750 | case BUILT_IN_RETURN: |
1751 | case BUILT_IN_APPLY_ARGS: | |
1752 | /* If a __builtin_apply_args caller would be inlined, | |
1753 | it would be saving arguments of the function it has | |
1754 | been inlined into. Similarly __builtin_return would | |
1755 | return from the function the inline has been inlined into. */ | |
1756 | inline_forbidden_reason | |
dee15844 | 1757 | = G_("function %q+F can never be inlined because " |
4b284111 JJ |
1758 | "it uses __builtin_return or __builtin_apply_args"); |
1759 | return node; | |
1760 | ||
3197c4fd AS |
1761 | default: |
1762 | break; | |
1763 | } | |
f08545a8 JH |
1764 | break; |
1765 | ||
f08545a8 JH |
1766 | case GOTO_EXPR: |
1767 | t = TREE_OPERAND (node, 0); | |
1768 | ||
1769 | /* We will not inline a function which uses computed goto. The | |
1770 | addresses of its local labels, which may be tucked into | |
1771 | global storage, are of course not constant across | |
1772 | instantiations, which causes unexpected behavior. */ | |
1773 | if (TREE_CODE (t) != LABEL_DECL) | |
1774 | { | |
ddd2d57e | 1775 | inline_forbidden_reason |
dee15844 | 1776 | = G_("function %q+F can never be inlined " |
ddd2d57e | 1777 | "because it contains a computed goto"); |
f08545a8 JH |
1778 | return node; |
1779 | } | |
6de9cd9a | 1780 | break; |
f08545a8 | 1781 | |
6de9cd9a DN |
1782 | case LABEL_EXPR: |
1783 | t = TREE_OPERAND (node, 0); | |
1784 | if (DECL_NONLOCAL (t)) | |
f08545a8 | 1785 | { |
6de9cd9a DN |
1786 | /* We cannot inline a function that receives a non-local goto |
1787 | because we cannot remap the destination label used in the | |
1788 | function that is performing the non-local goto. */ | |
ddd2d57e | 1789 | inline_forbidden_reason |
dee15844 | 1790 | = G_("function %q+F can never be inlined " |
6de9cd9a | 1791 | "because it receives a non-local goto"); |
ed397c43 | 1792 | return node; |
f08545a8 | 1793 | } |
f08545a8 JH |
1794 | break; |
1795 | ||
1796 | case RECORD_TYPE: | |
1797 | case UNION_TYPE: | |
1798 | /* We cannot inline a function of the form | |
1799 | ||
1800 | void F (int i) { struct S { int ar[i]; } s; } | |
1801 | ||
1802 | Attempting to do so produces a catch-22. | |
1803 | If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/ | |
1804 | UNION_TYPE nodes, then it goes into infinite recursion on a | |
1805 | structure containing a pointer to its own type. If it doesn't, | |
1806 | then the type node for S doesn't get adjusted properly when | |
0e61db61 | 1807 | F is inlined. |
27b892b4 RK |
1808 | |
1809 | ??? This is likely no longer true, but it's too late in the 4.0 | |
1810 | cycle to try to find out. This should be checked for 4.1. */ | |
f08545a8 | 1811 | for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t)) |
5377d5ba | 1812 | if (variably_modified_type_p (TREE_TYPE (t), NULL)) |
f08545a8 | 1813 | { |
ddd2d57e | 1814 | inline_forbidden_reason |
dee15844 | 1815 | = G_("function %q+F can never be inlined " |
ddd2d57e | 1816 | "because it uses variable sized variables"); |
f08545a8 JH |
1817 | return node; |
1818 | } | |
6de9cd9a | 1819 | |
f08545a8 JH |
1820 | default: |
1821 | break; | |
1822 | } | |
1823 | ||
1824 | return NULL_TREE; | |
84f5e1b1 RH |
1825 | } |
1826 | ||
f08545a8 | 1827 | /* Return subexpression representing possible alloca call, if any. */ |
84f5e1b1 | 1828 | static tree |
f08545a8 | 1829 | inline_forbidden_p (tree fndecl) |
84f5e1b1 | 1830 | { |
070588f0 | 1831 | location_t saved_loc = input_location; |
e21aff8a SB |
1832 | block_stmt_iterator bsi; |
1833 | basic_block bb; | |
1834 | tree ret = NULL_TREE; | |
1835 | ||
1836 | FOR_EACH_BB_FN (bb, DECL_STRUCT_FUNCTION (fndecl)) | |
1837 | for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi)) | |
1838 | { | |
1839 | ret = walk_tree_without_duplicates (bsi_stmt_ptr (bsi), | |
1840 | inline_forbidden_p_1, fndecl); | |
1841 | if (ret) | |
1842 | goto egress; | |
1843 | } | |
ed397c43 | 1844 | |
e21aff8a | 1845 | egress: |
070588f0 | 1846 | input_location = saved_loc; |
d1a74aa7 | 1847 | return ret; |
84f5e1b1 RH |
1848 | } |
1849 | ||
b3c3af2f SB |
1850 | /* Returns nonzero if FN is a function that does not have any |
1851 | fundamental inline blocking properties. */ | |
d4e4baa9 | 1852 | |
b3c3af2f SB |
1853 | static bool |
1854 | inlinable_function_p (tree fn) | |
d4e4baa9 | 1855 | { |
b3c3af2f | 1856 | bool inlinable = true; |
d4e4baa9 AO |
1857 | |
1858 | /* If we've already decided this function shouldn't be inlined, | |
1859 | there's no need to check again. */ | |
1860 | if (DECL_UNINLINABLE (fn)) | |
b3c3af2f | 1861 | return false; |
d4e4baa9 | 1862 | |
d58b7c2d MM |
1863 | /* See if there is any language-specific reason it cannot be |
1864 | inlined. (It is important that this hook be called early because | |
b3c3af2f SB |
1865 | in C++ it may result in template instantiation.) |
1866 | If the function is not inlinable for language-specific reasons, | |
1867 | it is left up to the langhook to explain why. */ | |
ae2bcd98 | 1868 | inlinable = !lang_hooks.tree_inlining.cannot_inline_tree_fn (&fn); |
46c5ad27 | 1869 | |
b3c3af2f SB |
1870 | /* If we don't have the function body available, we can't inline it. |
1871 | However, this should not be recorded since we also get here for | |
1872 | forward declared inline functions. Therefore, return at once. */ | |
1873 | if (!DECL_SAVED_TREE (fn)) | |
1874 | return false; | |
1875 | ||
1876 | /* If we're not inlining at all, then we cannot inline this function. */ | |
1877 | else if (!flag_inline_trees) | |
1878 | inlinable = false; | |
1879 | ||
1880 | /* Only try to inline functions if DECL_INLINE is set. This should be | |
1881 | true for all functions declared `inline', and for all other functions | |
1882 | as well with -finline-functions. | |
1883 | ||
1884 | Don't think of disregarding DECL_INLINE when flag_inline_trees == 2; | |
1885 | it's the front-end that must set DECL_INLINE in this case, because | |
1886 | dwarf2out loses if a function that does not have DECL_INLINE set is | |
1887 | inlined anyway. That is why we have both DECL_INLINE and | |
1888 | DECL_DECLARED_INLINE_P. */ | |
1889 | /* FIXME: When flag_inline_trees dies, the check for flag_unit_at_a_time | |
1890 | here should be redundant. */ | |
1891 | else if (!DECL_INLINE (fn) && !flag_unit_at_a_time) | |
1892 | inlinable = false; | |
a0c8285b | 1893 | |
f08545a8 | 1894 | else if (inline_forbidden_p (fn)) |
b3c3af2f SB |
1895 | { |
1896 | /* See if we should warn about uninlinable functions. Previously, | |
1897 | some of these warnings would be issued while trying to expand | |
1898 | the function inline, but that would cause multiple warnings | |
1899 | about functions that would for example call alloca. But since | |
1900 | this a property of the function, just one warning is enough. | |
1901 | As a bonus we can now give more details about the reason why a | |
1902 | function is not inlinable. | |
1903 | We only warn for functions declared `inline' by the user. */ | |
1904 | bool do_warning = (warn_inline | |
1905 | && DECL_INLINE (fn) | |
1906 | && DECL_DECLARED_INLINE_P (fn) | |
1907 | && !DECL_IN_SYSTEM_HEADER (fn)); | |
1908 | ||
aa4a53af | 1909 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))) |
dee15844 | 1910 | sorry (inline_forbidden_reason, fn); |
2d327012 | 1911 | else if (do_warning) |
d2fcbf6f | 1912 | warning (OPT_Winline, inline_forbidden_reason, fn); |
b3c3af2f SB |
1913 | |
1914 | inlinable = false; | |
1915 | } | |
d4e4baa9 AO |
1916 | |
1917 | /* Squirrel away the result so that we don't have to check again. */ | |
b3c3af2f | 1918 | DECL_UNINLINABLE (fn) = !inlinable; |
d4e4baa9 | 1919 | |
b3c3af2f SB |
1920 | return inlinable; |
1921 | } | |
1922 | ||
e5c4f28a RG |
1923 | /* Estimate the cost of a memory move. Use machine dependent |
1924 | word size and take possible memcpy call into account. */ | |
1925 | ||
1926 | int | |
1927 | estimate_move_cost (tree type) | |
1928 | { | |
1929 | HOST_WIDE_INT size; | |
1930 | ||
1931 | size = int_size_in_bytes (type); | |
1932 | ||
1933 | if (size < 0 || size > MOVE_MAX_PIECES * MOVE_RATIO) | |
1934 | /* Cost of a memcpy call, 3 arguments and the call. */ | |
1935 | return 4; | |
1936 | else | |
1937 | return ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES); | |
1938 | } | |
1939 | ||
7f9bc51b ZD |
1940 | /* Arguments for estimate_num_insns_1. */ |
1941 | ||
1942 | struct eni_data | |
1943 | { | |
1944 | /* Used to return the number of insns. */ | |
1945 | int count; | |
1946 | ||
1947 | /* Weights of various constructs. */ | |
1948 | eni_weights *weights; | |
1949 | }; | |
1950 | ||
6de9cd9a DN |
1951 | /* Used by estimate_num_insns. Estimate number of instructions seen |
1952 | by given statement. */ | |
aa4a53af | 1953 | |
6de9cd9a DN |
1954 | static tree |
1955 | estimate_num_insns_1 (tree *tp, int *walk_subtrees, void *data) | |
1956 | { | |
7f9bc51b | 1957 | struct eni_data *d = data; |
6de9cd9a | 1958 | tree x = *tp; |
7f9bc51b | 1959 | unsigned cost; |
6de9cd9a | 1960 | |
6615c446 | 1961 | if (IS_TYPE_OR_DECL_P (x)) |
6de9cd9a DN |
1962 | { |
1963 | *walk_subtrees = 0; | |
1964 | return NULL; | |
1965 | } | |
1966 | /* Assume that constants and references counts nothing. These should | |
1967 | be majorized by amount of operations among them we count later | |
1968 | and are common target of CSE and similar optimizations. */ | |
6615c446 | 1969 | else if (CONSTANT_CLASS_P (x) || REFERENCE_CLASS_P (x)) |
6de9cd9a | 1970 | return NULL; |
ed397c43 | 1971 | |
6de9cd9a | 1972 | switch (TREE_CODE (x)) |
9f63daea | 1973 | { |
6de9cd9a DN |
1974 | /* Containers have no cost. */ |
1975 | case TREE_LIST: | |
1976 | case TREE_VEC: | |
1977 | case BLOCK: | |
1978 | case COMPONENT_REF: | |
1979 | case BIT_FIELD_REF: | |
1980 | case INDIRECT_REF: | |
16630a2c DN |
1981 | case ALIGN_INDIRECT_REF: |
1982 | case MISALIGNED_INDIRECT_REF: | |
6de9cd9a DN |
1983 | case ARRAY_REF: |
1984 | case ARRAY_RANGE_REF: | |
0f59171d | 1985 | case OBJ_TYPE_REF: |
6de9cd9a DN |
1986 | case EXC_PTR_EXPR: /* ??? */ |
1987 | case FILTER_EXPR: /* ??? */ | |
1988 | case COMPOUND_EXPR: | |
1989 | case BIND_EXPR: | |
6de9cd9a DN |
1990 | case WITH_CLEANUP_EXPR: |
1991 | case NOP_EXPR: | |
1992 | case VIEW_CONVERT_EXPR: | |
1993 | case SAVE_EXPR: | |
6de9cd9a | 1994 | case ADDR_EXPR: |
6de9cd9a | 1995 | case COMPLEX_EXPR: |
61fcaeec | 1996 | case RANGE_EXPR: |
6de9cd9a DN |
1997 | case CASE_LABEL_EXPR: |
1998 | case SSA_NAME: | |
1999 | case CATCH_EXPR: | |
2000 | case EH_FILTER_EXPR: | |
2001 | case STATEMENT_LIST: | |
2002 | case ERROR_MARK: | |
2003 | case NON_LVALUE_EXPR: | |
6de9cd9a DN |
2004 | case FDESC_EXPR: |
2005 | case VA_ARG_EXPR: | |
2006 | case TRY_CATCH_EXPR: | |
2007 | case TRY_FINALLY_EXPR: | |
2008 | case LABEL_EXPR: | |
2009 | case GOTO_EXPR: | |
2010 | case RETURN_EXPR: | |
2011 | case EXIT_EXPR: | |
2012 | case LOOP_EXPR: | |
6de9cd9a | 2013 | case PHI_NODE: |
d25cee4d | 2014 | case WITH_SIZE_EXPR: |
aaf46ef9 | 2015 | case OMP_CLAUSE: |
777f7f9a RH |
2016 | case OMP_RETURN: |
2017 | case OMP_CONTINUE: | |
6de9cd9a | 2018 | break; |
aa4a53af | 2019 | |
6de9cd9a DN |
2020 | /* We don't account constants for now. Assume that the cost is amortized |
2021 | by operations that do use them. We may re-consider this decision once | |
128a79fb | 2022 | we are able to optimize the tree before estimating its size and break |
6de9cd9a DN |
2023 | out static initializers. */ |
2024 | case IDENTIFIER_NODE: | |
2025 | case INTEGER_CST: | |
2026 | case REAL_CST: | |
2027 | case COMPLEX_CST: | |
2028 | case VECTOR_CST: | |
2029 | case STRING_CST: | |
2030 | *walk_subtrees = 0; | |
2031 | return NULL; | |
3a5b9284 | 2032 | |
058dcc25 ILT |
2033 | /* CHANGE_DYNAMIC_TYPE_EXPR explicitly expands to nothing. */ |
2034 | case CHANGE_DYNAMIC_TYPE_EXPR: | |
2035 | *walk_subtrees = 0; | |
2036 | return NULL; | |
2037 | ||
e5c4f28a RG |
2038 | /* Try to estimate the cost of assignments. We have three cases to |
2039 | deal with: | |
2040 | 1) Simple assignments to registers; | |
2041 | 2) Stores to things that must live in memory. This includes | |
2042 | "normal" stores to scalars, but also assignments of large | |
2043 | structures, or constructors of big arrays; | |
2044 | 3) TARGET_EXPRs. | |
2045 | ||
2046 | Let us look at the first two cases, assuming we have "a = b + C": | |
07beea0d AH |
2047 | <GIMPLE_MODIFY_STMT <var_decl "a"> |
2048 | <plus_expr <var_decl "b"> <constant C>> | |
e5c4f28a RG |
2049 | If "a" is a GIMPLE register, the assignment to it is free on almost |
2050 | any target, because "a" usually ends up in a real register. Hence | |
2051 | the only cost of this expression comes from the PLUS_EXPR, and we | |
07beea0d | 2052 | can ignore the GIMPLE_MODIFY_STMT. |
e5c4f28a | 2053 | If "a" is not a GIMPLE register, the assignment to "a" will most |
07beea0d | 2054 | likely be a real store, so the cost of the GIMPLE_MODIFY_STMT is the cost |
e5c4f28a RG |
2055 | of moving something into "a", which we compute using the function |
2056 | estimate_move_cost. | |
2057 | ||
2058 | The third case deals with TARGET_EXPRs, for which the semantics are | |
2059 | that a temporary is assigned, unless the TARGET_EXPR itself is being | |
2060 | assigned to something else. In the latter case we do not need the | |
07beea0d AH |
2061 | temporary. E.g. in: |
2062 | <GIMPLE_MODIFY_STMT <var_decl "a"> <target_expr>>, the | |
2063 | GIMPLE_MODIFY_STMT is free. */ | |
6de9cd9a | 2064 | case INIT_EXPR: |
07beea0d | 2065 | case GIMPLE_MODIFY_STMT: |
e5c4f28a | 2066 | /* Is the right and side a TARGET_EXPR? */ |
07beea0d | 2067 | if (TREE_CODE (GENERIC_TREE_OPERAND (x, 1)) == TARGET_EXPR) |
e5c4f28a RG |
2068 | break; |
2069 | /* ... fall through ... */ | |
2070 | ||
3a5b9284 | 2071 | case TARGET_EXPR: |
07beea0d | 2072 | x = GENERIC_TREE_OPERAND (x, 0); |
e5c4f28a RG |
2073 | /* Is this an assignments to a register? */ |
2074 | if (is_gimple_reg (x)) | |
2075 | break; | |
2076 | /* Otherwise it's a store, so fall through to compute the move cost. */ | |
e21aff8a | 2077 | |
6de9cd9a | 2078 | case CONSTRUCTOR: |
7f9bc51b | 2079 | d->count += estimate_move_cost (TREE_TYPE (x)); |
6de9cd9a DN |
2080 | break; |
2081 | ||
e5c4f28a RG |
2082 | /* Assign cost of 1 to usual operations. |
2083 | ??? We may consider mapping RTL costs to this. */ | |
6de9cd9a | 2084 | case COND_EXPR: |
4151978d | 2085 | case VEC_COND_EXPR: |
6de9cd9a DN |
2086 | |
2087 | case PLUS_EXPR: | |
2088 | case MINUS_EXPR: | |
2089 | case MULT_EXPR: | |
2090 | ||
2091 | case FIX_TRUNC_EXPR: | |
6de9cd9a DN |
2092 | |
2093 | case NEGATE_EXPR: | |
2094 | case FLOAT_EXPR: | |
2095 | case MIN_EXPR: | |
2096 | case MAX_EXPR: | |
2097 | case ABS_EXPR: | |
2098 | ||
2099 | case LSHIFT_EXPR: | |
2100 | case RSHIFT_EXPR: | |
2101 | case LROTATE_EXPR: | |
2102 | case RROTATE_EXPR: | |
a6b46ba2 DN |
2103 | case VEC_LSHIFT_EXPR: |
2104 | case VEC_RSHIFT_EXPR: | |
6de9cd9a DN |
2105 | |
2106 | case BIT_IOR_EXPR: | |
2107 | case BIT_XOR_EXPR: | |
2108 | case BIT_AND_EXPR: | |
2109 | case BIT_NOT_EXPR: | |
2110 | ||
2111 | case TRUTH_ANDIF_EXPR: | |
2112 | case TRUTH_ORIF_EXPR: | |
2113 | case TRUTH_AND_EXPR: | |
2114 | case TRUTH_OR_EXPR: | |
2115 | case TRUTH_XOR_EXPR: | |
2116 | case TRUTH_NOT_EXPR: | |
2117 | ||
2118 | case LT_EXPR: | |
2119 | case LE_EXPR: | |
2120 | case GT_EXPR: | |
2121 | case GE_EXPR: | |
2122 | case EQ_EXPR: | |
2123 | case NE_EXPR: | |
2124 | case ORDERED_EXPR: | |
2125 | case UNORDERED_EXPR: | |
2126 | ||
2127 | case UNLT_EXPR: | |
2128 | case UNLE_EXPR: | |
2129 | case UNGT_EXPR: | |
2130 | case UNGE_EXPR: | |
2131 | case UNEQ_EXPR: | |
d1a7edaf | 2132 | case LTGT_EXPR: |
6de9cd9a DN |
2133 | |
2134 | case CONVERT_EXPR: | |
2135 | ||
2136 | case CONJ_EXPR: | |
2137 | ||
2138 | case PREDECREMENT_EXPR: | |
2139 | case PREINCREMENT_EXPR: | |
2140 | case POSTDECREMENT_EXPR: | |
2141 | case POSTINCREMENT_EXPR: | |
2142 | ||
6de9cd9a DN |
2143 | case ASM_EXPR: |
2144 | ||
16630a2c DN |
2145 | case REALIGN_LOAD_EXPR: |
2146 | ||
61d3cdbb DN |
2147 | case REDUC_MAX_EXPR: |
2148 | case REDUC_MIN_EXPR: | |
2149 | case REDUC_PLUS_EXPR: | |
20f06221 DN |
2150 | case WIDEN_SUM_EXPR: |
2151 | case DOT_PROD_EXPR: | |
89d67cca DN |
2152 | case VEC_WIDEN_MULT_HI_EXPR: |
2153 | case VEC_WIDEN_MULT_LO_EXPR: | |
2154 | case VEC_UNPACK_HI_EXPR: | |
2155 | case VEC_UNPACK_LO_EXPR: | |
d9987fb4 UB |
2156 | case VEC_UNPACK_FLOAT_HI_EXPR: |
2157 | case VEC_UNPACK_FLOAT_LO_EXPR: | |
8115817b | 2158 | case VEC_PACK_TRUNC_EXPR: |
89d67cca | 2159 | case VEC_PACK_SAT_EXPR: |
d9987fb4 | 2160 | case VEC_PACK_FIX_TRUNC_EXPR: |
20f06221 DN |
2161 | |
2162 | case WIDEN_MULT_EXPR: | |
61d3cdbb | 2163 | |
98b44b0e IR |
2164 | case VEC_EXTRACT_EVEN_EXPR: |
2165 | case VEC_EXTRACT_ODD_EXPR: | |
2166 | case VEC_INTERLEAVE_HIGH_EXPR: | |
2167 | case VEC_INTERLEAVE_LOW_EXPR: | |
2168 | ||
6de9cd9a | 2169 | case RESX_EXPR: |
7f9bc51b ZD |
2170 | d->count += 1; |
2171 | break; | |
2172 | ||
2173 | case SWITCH_EXPR: | |
2174 | /* TODO: Cost of a switch should be derived from the number of | |
2175 | branches. */ | |
2176 | d->count += d->weights->switch_cost; | |
6de9cd9a DN |
2177 | break; |
2178 | ||
1ea7e6ad | 2179 | /* Few special cases of expensive operations. This is useful |
6de9cd9a DN |
2180 | to avoid inlining on functions having too many of these. */ |
2181 | case TRUNC_DIV_EXPR: | |
2182 | case CEIL_DIV_EXPR: | |
2183 | case FLOOR_DIV_EXPR: | |
2184 | case ROUND_DIV_EXPR: | |
2185 | case EXACT_DIV_EXPR: | |
2186 | case TRUNC_MOD_EXPR: | |
2187 | case CEIL_MOD_EXPR: | |
2188 | case FLOOR_MOD_EXPR: | |
2189 | case ROUND_MOD_EXPR: | |
2190 | case RDIV_EXPR: | |
7f9bc51b | 2191 | d->count += d->weights->div_mod_cost; |
6de9cd9a DN |
2192 | break; |
2193 | case CALL_EXPR: | |
2194 | { | |
2195 | tree decl = get_callee_fndecl (x); | |
2196 | ||
7f9bc51b | 2197 | cost = d->weights->call_cost; |
8c96cd51 | 2198 | if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL) |
6de9cd9a DN |
2199 | switch (DECL_FUNCTION_CODE (decl)) |
2200 | { | |
2201 | case BUILT_IN_CONSTANT_P: | |
2202 | *walk_subtrees = 0; | |
2203 | return NULL_TREE; | |
2204 | case BUILT_IN_EXPECT: | |
2205 | return NULL_TREE; | |
7f9bc51b ZD |
2206 | /* Prefetch instruction is not expensive. */ |
2207 | case BUILT_IN_PREFETCH: | |
2208 | cost = 1; | |
2209 | break; | |
6de9cd9a DN |
2210 | default: |
2211 | break; | |
2212 | } | |
e5c4f28a | 2213 | |
c7f599d0 JH |
2214 | /* Our cost must be kept in sync with cgraph_estimate_size_after_inlining |
2215 | that does use function declaration to figure out the arguments. */ | |
2216 | if (!decl) | |
2217 | { | |
5039610b SL |
2218 | tree a; |
2219 | call_expr_arg_iterator iter; | |
2220 | FOR_EACH_CALL_EXPR_ARG (a, iter, x) | |
2221 | d->count += estimate_move_cost (TREE_TYPE (a)); | |
c7f599d0 JH |
2222 | } |
2223 | else | |
2224 | { | |
5039610b | 2225 | tree arg; |
c7f599d0 | 2226 | for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg)) |
7f9bc51b | 2227 | d->count += estimate_move_cost (TREE_TYPE (arg)); |
c7f599d0 | 2228 | } |
e5c4f28a | 2229 | |
7f9bc51b | 2230 | d->count += cost; |
6de9cd9a DN |
2231 | break; |
2232 | } | |
88f4034b DN |
2233 | |
2234 | case OMP_PARALLEL: | |
2235 | case OMP_FOR: | |
2236 | case OMP_SECTIONS: | |
2237 | case OMP_SINGLE: | |
2238 | case OMP_SECTION: | |
2239 | case OMP_MASTER: | |
2240 | case OMP_ORDERED: | |
2241 | case OMP_CRITICAL: | |
2242 | case OMP_ATOMIC: | |
2243 | /* OpenMP directives are generally very expensive. */ | |
7f9bc51b | 2244 | d->count += d->weights->omp_cost; |
88f4034b DN |
2245 | break; |
2246 | ||
6de9cd9a | 2247 | default: |
1e128c5f | 2248 | gcc_unreachable (); |
6de9cd9a DN |
2249 | } |
2250 | return NULL; | |
2251 | } | |
2252 | ||
7f9bc51b | 2253 | /* Estimate number of instructions that will be created by expanding EXPR. |
9f5ed61a | 2254 | WEIGHTS contains weights attributed to various constructs. */ |
aa4a53af | 2255 | |
6de9cd9a | 2256 | int |
7f9bc51b | 2257 | estimate_num_insns (tree expr, eni_weights *weights) |
6de9cd9a | 2258 | { |
e21aff8a SB |
2259 | struct pointer_set_t *visited_nodes; |
2260 | basic_block bb; | |
2261 | block_stmt_iterator bsi; | |
2262 | struct function *my_function; | |
7f9bc51b ZD |
2263 | struct eni_data data; |
2264 | ||
2265 | data.count = 0; | |
2266 | data.weights = weights; | |
e21aff8a SB |
2267 | |
2268 | /* If we're given an entire function, walk the CFG. */ | |
2269 | if (TREE_CODE (expr) == FUNCTION_DECL) | |
2270 | { | |
2271 | my_function = DECL_STRUCT_FUNCTION (expr); | |
2272 | gcc_assert (my_function && my_function->cfg); | |
2273 | visited_nodes = pointer_set_create (); | |
2274 | FOR_EACH_BB_FN (bb, my_function) | |
2275 | { | |
2276 | for (bsi = bsi_start (bb); | |
2277 | !bsi_end_p (bsi); | |
2278 | bsi_next (&bsi)) | |
2279 | { | |
2280 | walk_tree (bsi_stmt_ptr (bsi), estimate_num_insns_1, | |
7f9bc51b | 2281 | &data, visited_nodes); |
e21aff8a SB |
2282 | } |
2283 | } | |
2284 | pointer_set_destroy (visited_nodes); | |
2285 | } | |
2286 | else | |
7f9bc51b | 2287 | walk_tree_without_duplicates (&expr, estimate_num_insns_1, &data); |
e21aff8a | 2288 | |
7f9bc51b ZD |
2289 | return data.count; |
2290 | } | |
2291 | ||
2292 | /* Initializes weights used by estimate_num_insns. */ | |
2293 | ||
2294 | void | |
2295 | init_inline_once (void) | |
2296 | { | |
2297 | eni_inlining_weights.call_cost = PARAM_VALUE (PARAM_INLINE_CALL_COST); | |
2298 | eni_inlining_weights.div_mod_cost = 10; | |
2299 | eni_inlining_weights.switch_cost = 1; | |
2300 | eni_inlining_weights.omp_cost = 40; | |
2301 | ||
2302 | eni_size_weights.call_cost = 1; | |
2303 | eni_size_weights.div_mod_cost = 1; | |
2304 | eni_size_weights.switch_cost = 10; | |
2305 | eni_size_weights.omp_cost = 40; | |
2306 | ||
2307 | /* Estimating time for call is difficult, since we have no idea what the | |
2308 | called function does. In the current uses of eni_time_weights, | |
2309 | underestimating the cost does less harm than overestimating it, so | |
ea2c620c | 2310 | we choose a rather small value here. */ |
7f9bc51b ZD |
2311 | eni_time_weights.call_cost = 10; |
2312 | eni_time_weights.div_mod_cost = 10; | |
2313 | eni_time_weights.switch_cost = 4; | |
2314 | eni_time_weights.omp_cost = 40; | |
6de9cd9a DN |
2315 | } |
2316 | ||
426357ea KH |
2317 | typedef struct function *function_p; |
2318 | ||
2319 | DEF_VEC_P(function_p); | |
2320 | DEF_VEC_ALLOC_P(function_p,heap); | |
2321 | ||
e21aff8a | 2322 | /* Initialized with NOGC, making this poisonous to the garbage collector. */ |
426357ea | 2323 | static VEC(function_p,heap) *cfun_stack; |
e21aff8a SB |
2324 | |
2325 | void | |
2326 | push_cfun (struct function *new_cfun) | |
2327 | { | |
426357ea | 2328 | VEC_safe_push (function_p, heap, cfun_stack, cfun); |
e21aff8a SB |
2329 | cfun = new_cfun; |
2330 | } | |
2331 | ||
2332 | void | |
2333 | pop_cfun (void) | |
2334 | { | |
426357ea | 2335 | cfun = VEC_pop (function_p, cfun_stack); |
e21aff8a SB |
2336 | } |
2337 | ||
2338 | /* Install new lexical TREE_BLOCK underneath 'current_block'. */ | |
2339 | static void | |
2340 | add_lexical_block (tree current_block, tree new_block) | |
2341 | { | |
2342 | tree *blk_p; | |
2343 | ||
2344 | /* Walk to the last sub-block. */ | |
2345 | for (blk_p = &BLOCK_SUBBLOCKS (current_block); | |
2346 | *blk_p; | |
2347 | blk_p = &TREE_CHAIN (*blk_p)) | |
2348 | ; | |
2349 | *blk_p = new_block; | |
2350 | BLOCK_SUPERCONTEXT (new_block) = current_block; | |
e21aff8a SB |
2351 | } |
2352 | ||
d4e4baa9 AO |
2353 | /* If *TP is a CALL_EXPR, replace it with its inline expansion. */ |
2354 | ||
e21aff8a SB |
2355 | static bool |
2356 | expand_call_inline (basic_block bb, tree stmt, tree *tp, void *data) | |
d4e4baa9 | 2357 | { |
1b369fae | 2358 | copy_body_data *id; |
d4e4baa9 | 2359 | tree t; |
6de9cd9a | 2360 | tree use_retvar; |
d436bff8 | 2361 | tree fn; |
6be42dd4 | 2362 | struct pointer_map_t *st; |
110cfe1c | 2363 | tree return_slot; |
7740f00d | 2364 | tree modify_dest; |
6de9cd9a | 2365 | location_t saved_location; |
e21aff8a | 2366 | struct cgraph_edge *cg_edge; |
dc0bfe6a | 2367 | const char *reason; |
e21aff8a SB |
2368 | basic_block return_block; |
2369 | edge e; | |
2370 | block_stmt_iterator bsi, stmt_bsi; | |
2371 | bool successfully_inlined = FALSE; | |
4f6c2131 | 2372 | bool purge_dead_abnormal_edges; |
e21aff8a SB |
2373 | tree t_step; |
2374 | tree var; | |
d4e4baa9 AO |
2375 | |
2376 | /* See what we've got. */ | |
1b369fae | 2377 | id = (copy_body_data *) data; |
d4e4baa9 AO |
2378 | t = *tp; |
2379 | ||
6de9cd9a DN |
2380 | /* Set input_location here so we get the right instantiation context |
2381 | if we call instantiate_decl from inlinable_function_p. */ | |
2382 | saved_location = input_location; | |
2383 | if (EXPR_HAS_LOCATION (t)) | |
2384 | input_location = EXPR_LOCATION (t); | |
2385 | ||
d4e4baa9 AO |
2386 | /* From here on, we're only interested in CALL_EXPRs. */ |
2387 | if (TREE_CODE (t) != CALL_EXPR) | |
6de9cd9a | 2388 | goto egress; |
d4e4baa9 AO |
2389 | |
2390 | /* First, see if we can figure out what function is being called. | |
2391 | If we cannot, then there is no hope of inlining the function. */ | |
2392 | fn = get_callee_fndecl (t); | |
2393 | if (!fn) | |
6de9cd9a | 2394 | goto egress; |
d4e4baa9 | 2395 | |
b58b1157 | 2396 | /* Turn forward declarations into real ones. */ |
d4d1ebc1 | 2397 | fn = cgraph_node (fn)->decl; |
b58b1157 | 2398 | |
a1a0fd4e AO |
2399 | /* If fn is a declaration of a function in a nested scope that was |
2400 | globally declared inline, we don't set its DECL_INITIAL. | |
2401 | However, we can't blindly follow DECL_ABSTRACT_ORIGIN because the | |
2402 | C++ front-end uses it for cdtors to refer to their internal | |
2403 | declarations, that are not real functions. Fortunately those | |
2404 | don't have trees to be saved, so we can tell by checking their | |
2405 | DECL_SAVED_TREE. */ | |
2406 | if (! DECL_INITIAL (fn) | |
2407 | && DECL_ABSTRACT_ORIGIN (fn) | |
2408 | && DECL_SAVED_TREE (DECL_ABSTRACT_ORIGIN (fn))) | |
2409 | fn = DECL_ABSTRACT_ORIGIN (fn); | |
2410 | ||
18c6ada9 JH |
2411 | /* Objective C and fortran still calls tree_rest_of_compilation directly. |
2412 | Kill this check once this is fixed. */ | |
1b369fae | 2413 | if (!id->dst_node->analyzed) |
6de9cd9a | 2414 | goto egress; |
18c6ada9 | 2415 | |
1b369fae | 2416 | cg_edge = cgraph_edge (id->dst_node, stmt); |
18c6ada9 JH |
2417 | |
2418 | /* Constant propagation on argument done during previous inlining | |
2419 | may create new direct call. Produce an edge for it. */ | |
e21aff8a | 2420 | if (!cg_edge) |
18c6ada9 JH |
2421 | { |
2422 | struct cgraph_node *dest = cgraph_node (fn); | |
2423 | ||
6de9cd9a DN |
2424 | /* We have missing edge in the callgraph. This can happen in one case |
2425 | where previous inlining turned indirect call into direct call by | |
2426 | constant propagating arguments. In all other cases we hit a bug | |
2427 | (incorrect node sharing is most common reason for missing edges. */ | |
70f3cc30 | 2428 | gcc_assert (dest->needed || !flag_unit_at_a_time); |
1b369fae | 2429 | cgraph_create_edge (id->dst_node, dest, stmt, |
45a80bb9 JH |
2430 | bb->count, CGRAPH_FREQ_BASE, |
2431 | bb->loop_depth)->inline_failed | |
18c6ada9 | 2432 | = N_("originally indirect function call not considered for inlining"); |
45a80bb9 JH |
2433 | if (dump_file) |
2434 | { | |
2435 | fprintf (dump_file, "Created new direct edge to %s", | |
2436 | cgraph_node_name (dest)); | |
2437 | } | |
6de9cd9a | 2438 | goto egress; |
18c6ada9 JH |
2439 | } |
2440 | ||
d4e4baa9 AO |
2441 | /* Don't try to inline functions that are not well-suited to |
2442 | inlining. */ | |
e21aff8a | 2443 | if (!cgraph_inline_p (cg_edge, &reason)) |
a833faa5 | 2444 | { |
7fac66d4 JH |
2445 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) |
2446 | /* Avoid warnings during early inline pass. */ | |
2447 | && (!flag_unit_at_a_time || cgraph_global_info_ready)) | |
2d327012 | 2448 | { |
dee15844 | 2449 | sorry ("inlining failed in call to %q+F: %s", fn, reason); |
2d327012 JH |
2450 | sorry ("called from here"); |
2451 | } | |
2452 | else if (warn_inline && DECL_DECLARED_INLINE_P (fn) | |
2453 | && !DECL_IN_SYSTEM_HEADER (fn) | |
09ebcffa | 2454 | && strlen (reason) |
d63db217 JH |
2455 | && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn)) |
2456 | /* Avoid warnings during early inline pass. */ | |
2457 | && (!flag_unit_at_a_time || cgraph_global_info_ready)) | |
a833faa5 | 2458 | { |
dee15844 JM |
2459 | warning (OPT_Winline, "inlining failed in call to %q+F: %s", |
2460 | fn, reason); | |
3176a0c2 | 2461 | warning (OPT_Winline, "called from here"); |
a833faa5 | 2462 | } |
6de9cd9a | 2463 | goto egress; |
a833faa5 | 2464 | } |
ea99e0be | 2465 | fn = cg_edge->callee->decl; |
d4e4baa9 | 2466 | |
18c6ada9 | 2467 | #ifdef ENABLE_CHECKING |
1b369fae | 2468 | if (cg_edge->callee->decl != id->dst_node->decl) |
e21aff8a | 2469 | verify_cgraph_node (cg_edge->callee); |
18c6ada9 JH |
2470 | #endif |
2471 | ||
e21aff8a | 2472 | /* We will be inlining this callee. */ |
e21aff8a SB |
2473 | id->eh_region = lookup_stmt_eh_region (stmt); |
2474 | ||
2475 | /* Split the block holding the CALL_EXPR. */ | |
e21aff8a SB |
2476 | e = split_block (bb, stmt); |
2477 | bb = e->src; | |
2478 | return_block = e->dest; | |
2479 | remove_edge (e); | |
2480 | ||
4f6c2131 EB |
2481 | /* split_block splits after the statement; work around this by |
2482 | moving the call into the second block manually. Not pretty, | |
2483 | but seems easier than doing the CFG manipulation by hand | |
2484 | when the CALL_EXPR is in the last statement of BB. */ | |
e21aff8a | 2485 | stmt_bsi = bsi_last (bb); |
4f6c2131 EB |
2486 | bsi_remove (&stmt_bsi, false); |
2487 | ||
2488 | /* If the CALL_EXPR was in the last statement of BB, it may have | |
2489 | been the source of abnormal edges. In this case, schedule | |
2490 | the removal of dead abnormal edges. */ | |
e21aff8a | 2491 | bsi = bsi_start (return_block); |
4f6c2131 | 2492 | if (bsi_end_p (bsi)) |
e21aff8a | 2493 | { |
e21aff8a | 2494 | bsi_insert_after (&bsi, stmt, BSI_NEW_STMT); |
4f6c2131 | 2495 | purge_dead_abnormal_edges = true; |
e21aff8a | 2496 | } |
4f6c2131 EB |
2497 | else |
2498 | { | |
2499 | bsi_insert_before (&bsi, stmt, BSI_NEW_STMT); | |
2500 | purge_dead_abnormal_edges = false; | |
2501 | } | |
2502 | ||
e21aff8a | 2503 | stmt_bsi = bsi_start (return_block); |
742a37d5 | 2504 | |
d436bff8 AH |
2505 | /* Build a block containing code to initialize the arguments, the |
2506 | actual inline expansion of the body, and a label for the return | |
2507 | statements within the function to jump to. The type of the | |
2508 | statement expression is the return type of the function call. */ | |
e21aff8a SB |
2509 | id->block = make_node (BLOCK); |
2510 | BLOCK_ABSTRACT_ORIGIN (id->block) = fn; | |
3e2844cb | 2511 | BLOCK_SOURCE_LOCATION (id->block) = input_location; |
e21aff8a SB |
2512 | add_lexical_block (TREE_BLOCK (stmt), id->block); |
2513 | ||
d4e4baa9 AO |
2514 | /* Local declarations will be replaced by their equivalents in this |
2515 | map. */ | |
2516 | st = id->decl_map; | |
6be42dd4 | 2517 | id->decl_map = pointer_map_create (); |
d4e4baa9 | 2518 | |
e21aff8a | 2519 | /* Record the function we are about to inline. */ |
1b369fae RH |
2520 | id->src_fn = fn; |
2521 | id->src_node = cg_edge->callee; | |
110cfe1c | 2522 | id->src_cfun = DECL_STRUCT_FUNCTION (fn); |
1b369fae | 2523 | |
5039610b | 2524 | initialize_inlined_parameters (id, t, fn, bb); |
d4e4baa9 | 2525 | |
ea99e0be | 2526 | if (DECL_INITIAL (fn)) |
acb8f212 JH |
2527 | add_lexical_block (id->block, remap_blocks (DECL_INITIAL (fn), id)); |
2528 | ||
d4e4baa9 AO |
2529 | /* Return statements in the function body will be replaced by jumps |
2530 | to the RET_LABEL. */ | |
d4e4baa9 | 2531 | |
1e128c5f GB |
2532 | gcc_assert (DECL_INITIAL (fn)); |
2533 | gcc_assert (TREE_CODE (DECL_INITIAL (fn)) == BLOCK); | |
23700f65 | 2534 | |
7740f00d | 2535 | /* Find the lhs to which the result of this call is assigned. */ |
110cfe1c | 2536 | return_slot = NULL; |
07beea0d | 2537 | if (TREE_CODE (stmt) == GIMPLE_MODIFY_STMT) |
81bafd36 | 2538 | { |
07beea0d | 2539 | modify_dest = GIMPLE_STMT_OPERAND (stmt, 0); |
81bafd36 ILT |
2540 | |
2541 | /* The function which we are inlining might not return a value, | |
2542 | in which case we should issue a warning that the function | |
2543 | does not return a value. In that case the optimizers will | |
2544 | see that the variable to which the value is assigned was not | |
2545 | initialized. We do not want to issue a warning about that | |
2546 | uninitialized variable. */ | |
2547 | if (DECL_P (modify_dest)) | |
2548 | TREE_NO_WARNING (modify_dest) = 1; | |
fa47911c JM |
2549 | if (CALL_EXPR_RETURN_SLOT_OPT (t)) |
2550 | { | |
110cfe1c | 2551 | return_slot = modify_dest; |
fa47911c JM |
2552 | modify_dest = NULL; |
2553 | } | |
81bafd36 | 2554 | } |
7740f00d RH |
2555 | else |
2556 | modify_dest = NULL; | |
2557 | ||
d4e4baa9 | 2558 | /* Declare the return variable for the function. */ |
110cfe1c | 2559 | declare_return_variable (id, return_slot, |
c08cd4c1 | 2560 | modify_dest, &use_retvar); |
d4e4baa9 | 2561 | |
e21aff8a SB |
2562 | /* This is it. Duplicate the callee body. Assume callee is |
2563 | pre-gimplified. Note that we must not alter the caller | |
2564 | function in any way before this point, as this CALL_EXPR may be | |
2565 | a self-referential call; if we're calling ourselves, we need to | |
2566 | duplicate our body before altering anything. */ | |
2567 | copy_body (id, bb->count, bb->frequency, bb, return_block); | |
50aadcbc | 2568 | |
acb8f212 | 2569 | /* Add local vars in this inlined callee to caller. */ |
1b369fae | 2570 | t_step = id->src_cfun->unexpanded_var_list; |
acb8f212 JH |
2571 | for (; t_step; t_step = TREE_CHAIN (t_step)) |
2572 | { | |
2573 | var = TREE_VALUE (t_step); | |
2574 | if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var)) | |
2575 | cfun->unexpanded_var_list = tree_cons (NULL_TREE, var, | |
2576 | cfun->unexpanded_var_list); | |
2577 | else | |
2578 | cfun->unexpanded_var_list = tree_cons (NULL_TREE, remap_decl (var, id), | |
2579 | cfun->unexpanded_var_list); | |
2580 | } | |
2581 | ||
d4e4baa9 | 2582 | /* Clean up. */ |
6be42dd4 | 2583 | pointer_map_destroy (id->decl_map); |
d4e4baa9 AO |
2584 | id->decl_map = st; |
2585 | ||
84936f6f | 2586 | /* If the inlined function returns a result that we care about, |
e21aff8a SB |
2587 | clobber the CALL_EXPR with a reference to the return variable. */ |
2588 | if (use_retvar && (TREE_CODE (bsi_stmt (stmt_bsi)) != CALL_EXPR)) | |
2589 | { | |
2590 | *tp = use_retvar; | |
110cfe1c JH |
2591 | if (gimple_in_ssa_p (cfun)) |
2592 | { | |
2593 | update_stmt (stmt); | |
2594 | mark_symbols_for_renaming (stmt); | |
2595 | } | |
e21aff8a SB |
2596 | maybe_clean_or_replace_eh_stmt (stmt, stmt); |
2597 | } | |
6de9cd9a | 2598 | else |
e21aff8a SB |
2599 | /* We're modifying a TSI owned by gimple_expand_calls_inline(); |
2600 | tsi_delink() will leave the iterator in a sane state. */ | |
110cfe1c JH |
2601 | { |
2602 | /* Handle case of inlining function that miss return statement so | |
2603 | return value becomes undefined. */ | |
2604 | if (TREE_CODE (stmt) == GIMPLE_MODIFY_STMT | |
2605 | && TREE_CODE (GIMPLE_STMT_OPERAND (stmt, 0)) == SSA_NAME) | |
2606 | { | |
2607 | tree name = TREE_OPERAND (stmt, 0); | |
2608 | tree var = SSA_NAME_VAR (TREE_OPERAND (stmt, 0)); | |
2609 | tree def = gimple_default_def (cfun, var); | |
2610 | ||
2611 | /* If the variable is used undefined, make this name undefined via | |
2612 | move. */ | |
2613 | if (def) | |
2614 | { | |
2615 | TREE_OPERAND (stmt, 1) = def; | |
2616 | update_stmt (stmt); | |
2617 | } | |
2618 | /* Otherwise make this variable undefined. */ | |
2619 | else | |
2620 | { | |
2621 | bsi_remove (&stmt_bsi, true); | |
2622 | set_default_def (var, name); | |
2623 | SSA_NAME_DEF_STMT (name) = build_empty_stmt (); | |
2624 | } | |
2625 | } | |
2626 | else | |
2627 | bsi_remove (&stmt_bsi, true); | |
2628 | } | |
d4e4baa9 | 2629 | |
4f6c2131 EB |
2630 | if (purge_dead_abnormal_edges) |
2631 | tree_purge_dead_abnormal_call_edges (return_block); | |
84936f6f | 2632 | |
e21aff8a SB |
2633 | /* If the value of the new expression is ignored, that's OK. We |
2634 | don't warn about this for CALL_EXPRs, so we shouldn't warn about | |
2635 | the equivalent inlined version either. */ | |
2636 | TREE_USED (*tp) = 1; | |
84936f6f | 2637 | |
1eb3331e DB |
2638 | /* Output the inlining info for this abstract function, since it has been |
2639 | inlined. If we don't do this now, we can lose the information about the | |
2640 | variables in the function when the blocks get blown away as soon as we | |
2641 | remove the cgraph node. */ | |
e21aff8a | 2642 | (*debug_hooks->outlining_inline_function) (cg_edge->callee->decl); |
84936f6f | 2643 | |
e72fcfe8 | 2644 | /* Update callgraph if needed. */ |
e21aff8a | 2645 | cgraph_remove_node (cg_edge->callee); |
e72fcfe8 | 2646 | |
e21aff8a | 2647 | id->block = NULL_TREE; |
e21aff8a | 2648 | successfully_inlined = TRUE; |
742a37d5 | 2649 | |
6de9cd9a DN |
2650 | egress: |
2651 | input_location = saved_location; | |
e21aff8a | 2652 | return successfully_inlined; |
d4e4baa9 | 2653 | } |
6de9cd9a | 2654 | |
e21aff8a SB |
2655 | /* Expand call statements reachable from STMT_P. |
2656 | We can only have CALL_EXPRs as the "toplevel" tree code or nested | |
07beea0d | 2657 | in a GIMPLE_MODIFY_STMT. See tree-gimple.c:get_call_expr_in(). We can |
e21aff8a SB |
2658 | unfortunately not use that function here because we need a pointer |
2659 | to the CALL_EXPR, not the tree itself. */ | |
2660 | ||
2661 | static bool | |
1b369fae | 2662 | gimple_expand_calls_inline (basic_block bb, copy_body_data *id) |
6de9cd9a | 2663 | { |
e21aff8a | 2664 | block_stmt_iterator bsi; |
6de9cd9a | 2665 | |
e21aff8a SB |
2666 | /* Register specific tree functions. */ |
2667 | tree_register_cfg_hooks (); | |
2668 | for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi)) | |
6de9cd9a | 2669 | { |
e21aff8a SB |
2670 | tree *expr_p = bsi_stmt_ptr (bsi); |
2671 | tree stmt = *expr_p; | |
2672 | ||
07beea0d AH |
2673 | if (TREE_CODE (*expr_p) == GIMPLE_MODIFY_STMT) |
2674 | expr_p = &GIMPLE_STMT_OPERAND (*expr_p, 1); | |
e21aff8a SB |
2675 | if (TREE_CODE (*expr_p) == WITH_SIZE_EXPR) |
2676 | expr_p = &TREE_OPERAND (*expr_p, 0); | |
2677 | if (TREE_CODE (*expr_p) == CALL_EXPR) | |
2678 | if (expand_call_inline (bb, stmt, expr_p, id)) | |
2679 | return true; | |
6de9cd9a | 2680 | } |
e21aff8a | 2681 | return false; |
6de9cd9a DN |
2682 | } |
2683 | ||
b8a00a4d JH |
2684 | /* Walk all basic blocks created after FIRST and try to fold every statement |
2685 | in the STATEMENTS pointer set. */ | |
2686 | static void | |
2687 | fold_marked_statements (int first, struct pointer_set_t *statements) | |
2688 | { | |
2689 | for (;first < n_basic_blocks;first++) | |
2690 | if (BASIC_BLOCK (first)) | |
2691 | { | |
2692 | block_stmt_iterator bsi; | |
2693 | for (bsi = bsi_start (BASIC_BLOCK (first)); | |
2694 | !bsi_end_p (bsi); bsi_next (&bsi)) | |
2695 | if (pointer_set_contains (statements, bsi_stmt (bsi))) | |
9477eb38 JH |
2696 | { |
2697 | tree old_stmt = bsi_stmt (bsi); | |
2698 | if (fold_stmt (bsi_stmt_ptr (bsi))) | |
2699 | { | |
2700 | update_stmt (bsi_stmt (bsi)); | |
2701 | if (maybe_clean_or_replace_eh_stmt (old_stmt, bsi_stmt (bsi))) | |
2702 | tree_purge_dead_eh_edges (BASIC_BLOCK (first)); | |
2703 | } | |
2704 | } | |
b8a00a4d JH |
2705 | } |
2706 | } | |
2707 | ||
1084e689 JH |
2708 | /* Return true if BB has at least one abnormal outgoing edge. */ |
2709 | ||
2710 | static inline bool | |
2711 | has_abnormal_outgoing_edge_p (basic_block bb) | |
2712 | { | |
2713 | edge e; | |
2714 | edge_iterator ei; | |
2715 | ||
2716 | FOR_EACH_EDGE (e, ei, bb->succs) | |
2717 | if (e->flags & EDGE_ABNORMAL) | |
2718 | return true; | |
2719 | ||
2720 | return false; | |
2721 | } | |
2722 | ||
2723 | /* When a block from the inlined function contains a call with side-effects | |
2724 | in the middle gets inlined in a function with non-locals labels, the call | |
2725 | becomes a potential non-local goto so we need to add appropriate edge. */ | |
2726 | ||
2727 | static void | |
2728 | make_nonlocal_label_edges (void) | |
2729 | { | |
2730 | block_stmt_iterator bsi; | |
2731 | basic_block bb; | |
2732 | ||
2733 | FOR_EACH_BB (bb) | |
2734 | { | |
2735 | for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi)) | |
2736 | { | |
2737 | tree stmt = bsi_stmt (bsi); | |
2738 | if (tree_can_make_abnormal_goto (stmt)) | |
2739 | { | |
2740 | if (stmt == bsi_stmt (bsi_last (bb))) | |
2741 | { | |
2742 | if (!has_abnormal_outgoing_edge_p (bb)) | |
2743 | make_abnormal_goto_edges (bb, true); | |
2744 | } | |
2745 | else | |
2746 | { | |
2747 | edge e = split_block (bb, stmt); | |
2748 | bb = e->src; | |
2749 | make_abnormal_goto_edges (bb, true); | |
2750 | } | |
2751 | break; | |
2752 | } | |
2753 | ||
2754 | /* Update PHIs on nonlocal goto receivers we (possibly) | |
2755 | just created new edges into. */ | |
2756 | if (TREE_CODE (stmt) == LABEL_EXPR | |
2757 | && gimple_in_ssa_p (cfun)) | |
2758 | { | |
2759 | tree target = LABEL_EXPR_LABEL (stmt); | |
2760 | if (DECL_NONLOCAL (target)) | |
2761 | { | |
2762 | tree phi; | |
2763 | ||
2764 | for (phi = phi_nodes (bb); phi; phi = PHI_CHAIN (phi)) | |
2765 | { | |
2766 | gcc_assert (SSA_NAME_OCCURS_IN_ABNORMAL_PHI | |
2767 | (PHI_RESULT (phi))); | |
2768 | mark_sym_for_renaming | |
2769 | (SSA_NAME_VAR (PHI_RESULT (phi))); | |
2770 | } | |
2771 | } | |
2772 | } | |
2773 | } | |
2774 | } | |
2775 | } | |
2776 | ||
d4e4baa9 AO |
2777 | /* Expand calls to inline functions in the body of FN. */ |
2778 | ||
873aa8f5 | 2779 | unsigned int |
46c5ad27 | 2780 | optimize_inline_calls (tree fn) |
d4e4baa9 | 2781 | { |
1b369fae | 2782 | copy_body_data id; |
d4e4baa9 | 2783 | tree prev_fn; |
e21aff8a | 2784 | basic_block bb; |
b8a00a4d | 2785 | int last = n_basic_blocks; |
c5b6f18e MM |
2786 | /* There is no point in performing inlining if errors have already |
2787 | occurred -- and we might crash if we try to inline invalid | |
2788 | code. */ | |
2789 | if (errorcount || sorrycount) | |
873aa8f5 | 2790 | return 0; |
c5b6f18e | 2791 | |
d4e4baa9 AO |
2792 | /* Clear out ID. */ |
2793 | memset (&id, 0, sizeof (id)); | |
2794 | ||
1b369fae RH |
2795 | id.src_node = id.dst_node = cgraph_node (fn); |
2796 | id.dst_fn = fn; | |
d4e4baa9 AO |
2797 | /* Or any functions that aren't finished yet. */ |
2798 | prev_fn = NULL_TREE; | |
2799 | if (current_function_decl) | |
2800 | { | |
1b369fae | 2801 | id.dst_fn = current_function_decl; |
d4e4baa9 AO |
2802 | prev_fn = current_function_decl; |
2803 | } | |
1b369fae RH |
2804 | |
2805 | id.copy_decl = copy_decl_maybe_to_var; | |
2806 | id.transform_call_graph_edges = CB_CGE_DUPLICATE; | |
2807 | id.transform_new_cfg = false; | |
2808 | id.transform_return_to_modify = true; | |
2809 | id.transform_lang_insert_block = false; | |
b8a00a4d | 2810 | id.statements_to_fold = pointer_set_create (); |
1b369fae | 2811 | |
e21aff8a | 2812 | push_gimplify_context (); |
d4e4baa9 | 2813 | |
672987e8 ZD |
2814 | /* We make no attempts to keep dominance info up-to-date. */ |
2815 | free_dominance_info (CDI_DOMINATORS); | |
2816 | free_dominance_info (CDI_POST_DOMINATORS); | |
2817 | ||
e21aff8a SB |
2818 | /* Reach the trees by walking over the CFG, and note the |
2819 | enclosing basic-blocks in the call edges. */ | |
2820 | /* We walk the blocks going forward, because inlined function bodies | |
2821 | will split id->current_basic_block, and the new blocks will | |
2822 | follow it; we'll trudge through them, processing their CALL_EXPRs | |
2823 | along the way. */ | |
2824 | FOR_EACH_BB (bb) | |
2825 | gimple_expand_calls_inline (bb, &id); | |
d4e4baa9 | 2826 | |
e21aff8a SB |
2827 | pop_gimplify_context (NULL); |
2828 | /* Renumber the (code) basic_blocks consecutively. */ | |
2829 | compact_blocks (); | |
2830 | /* Renumber the lexical scoping (non-code) blocks consecutively. */ | |
2831 | number_blocks (fn); | |
6de9cd9a | 2832 | |
18c6ada9 JH |
2833 | #ifdef ENABLE_CHECKING |
2834 | { | |
2835 | struct cgraph_edge *e; | |
2836 | ||
1b369fae | 2837 | verify_cgraph_node (id.dst_node); |
18c6ada9 JH |
2838 | |
2839 | /* Double check that we inlined everything we are supposed to inline. */ | |
1b369fae | 2840 | for (e = id.dst_node->callees; e; e = e->next_callee) |
1e128c5f | 2841 | gcc_assert (e->inline_failed); |
18c6ada9 JH |
2842 | } |
2843 | #endif | |
b8a00a4d | 2844 | |
873aa8f5 JH |
2845 | /* We are not going to maintain the cgraph edges up to date. |
2846 | Kill it so it won't confuse us. */ | |
2847 | cgraph_node_remove_callees (id.dst_node); | |
2848 | ||
b8a00a4d JH |
2849 | fold_marked_statements (last, id.statements_to_fold); |
2850 | pointer_set_destroy (id.statements_to_fold); | |
873aa8f5 | 2851 | fold_cond_expr_cond (); |
1084e689 JH |
2852 | if (current_function_has_nonlocal_label) |
2853 | make_nonlocal_label_edges (); | |
110cfe1c JH |
2854 | /* It would be nice to check SSA/CFG/statement consistency here, but it is |
2855 | not possible yet - the IPA passes might make various functions to not | |
2856 | throw and they don't care to proactively update local EH info. This is | |
2857 | done later in fixup_cfg pass that also execute the verification. */ | |
873aa8f5 | 2858 | return (TODO_update_ssa | TODO_cleanup_cfg |
45a80bb9 JH |
2859 | | (gimple_in_ssa_p (cfun) ? TODO_remove_unused_locals : 0) |
2860 | | (profile_status != PROFILE_ABSENT ? TODO_rebuild_frequencies : 0)); | |
d4e4baa9 AO |
2861 | } |
2862 | ||
aa4a53af RK |
2863 | /* FN is a function that has a complete body, and CLONE is a function whose |
2864 | body is to be set to a copy of FN, mapping argument declarations according | |
2865 | to the ARG_MAP splay_tree. */ | |
d4e4baa9 AO |
2866 | |
2867 | void | |
46c5ad27 | 2868 | clone_body (tree clone, tree fn, void *arg_map) |
d4e4baa9 | 2869 | { |
1b369fae | 2870 | copy_body_data id; |
d4e4baa9 | 2871 | |
aa4a53af | 2872 | /* Clone the body, as if we were making an inline call. But, remap the |
e21aff8a | 2873 | parameters in the callee to the parameters of caller. */ |
d4e4baa9 | 2874 | memset (&id, 0, sizeof (id)); |
1b369fae RH |
2875 | id.src_fn = fn; |
2876 | id.dst_fn = clone; | |
2877 | id.src_cfun = DECL_STRUCT_FUNCTION (fn); | |
6be42dd4 | 2878 | id.decl_map = (struct pointer_map_t *)arg_map; |
d4e4baa9 | 2879 | |
1b369fae RH |
2880 | id.copy_decl = copy_decl_no_change; |
2881 | id.transform_call_graph_edges = CB_CGE_DUPLICATE; | |
2882 | id.transform_new_cfg = true; | |
2883 | id.transform_return_to_modify = false; | |
2884 | id.transform_lang_insert_block = true; | |
d4e4baa9 | 2885 | |
e21aff8a SB |
2886 | /* We're not inside any EH region. */ |
2887 | id.eh_region = -1; | |
2888 | ||
d4e4baa9 | 2889 | /* Actually copy the body. */ |
e21aff8a | 2890 | append_to_statement_list_force (copy_generic_body (&id), &DECL_SAVED_TREE (clone)); |
d4e4baa9 AO |
2891 | } |
2892 | ||
d4e4baa9 AO |
2893 | /* Passed to walk_tree. Copies the node pointed to, if appropriate. */ |
2894 | ||
2895 | tree | |
46c5ad27 | 2896 | copy_tree_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED) |
d4e4baa9 AO |
2897 | { |
2898 | enum tree_code code = TREE_CODE (*tp); | |
07beea0d | 2899 | enum tree_code_class cl = TREE_CODE_CLASS (code); |
d4e4baa9 AO |
2900 | |
2901 | /* We make copies of most nodes. */ | |
07beea0d AH |
2902 | if (IS_EXPR_CODE_CLASS (cl) |
2903 | || IS_GIMPLE_STMT_CODE_CLASS (cl) | |
d4e4baa9 AO |
2904 | || code == TREE_LIST |
2905 | || code == TREE_VEC | |
8843c120 DN |
2906 | || code == TYPE_DECL |
2907 | || code == OMP_CLAUSE) | |
d4e4baa9 AO |
2908 | { |
2909 | /* Because the chain gets clobbered when we make a copy, we save it | |
2910 | here. */ | |
07beea0d AH |
2911 | tree chain = NULL_TREE, new; |
2912 | ||
2913 | if (!GIMPLE_TUPLE_P (*tp)) | |
2914 | chain = TREE_CHAIN (*tp); | |
d4e4baa9 AO |
2915 | |
2916 | /* Copy the node. */ | |
6de9cd9a DN |
2917 | new = copy_node (*tp); |
2918 | ||
2919 | /* Propagate mudflap marked-ness. */ | |
2920 | if (flag_mudflap && mf_marked_p (*tp)) | |
2921 | mf_mark (new); | |
2922 | ||
2923 | *tp = new; | |
d4e4baa9 AO |
2924 | |
2925 | /* Now, restore the chain, if appropriate. That will cause | |
2926 | walk_tree to walk into the chain as well. */ | |
50674e96 DN |
2927 | if (code == PARM_DECL |
2928 | || code == TREE_LIST | |
aaf46ef9 | 2929 | || code == OMP_CLAUSE) |
d4e4baa9 AO |
2930 | TREE_CHAIN (*tp) = chain; |
2931 | ||
2932 | /* For now, we don't update BLOCKs when we make copies. So, we | |
6de9cd9a DN |
2933 | have to nullify all BIND_EXPRs. */ |
2934 | if (TREE_CODE (*tp) == BIND_EXPR) | |
2935 | BIND_EXPR_BLOCK (*tp) = NULL_TREE; | |
d4e4baa9 | 2936 | } |
4038c495 GB |
2937 | else if (code == CONSTRUCTOR) |
2938 | { | |
2939 | /* CONSTRUCTOR nodes need special handling because | |
2940 | we need to duplicate the vector of elements. */ | |
2941 | tree new; | |
2942 | ||
2943 | new = copy_node (*tp); | |
2944 | ||
2945 | /* Propagate mudflap marked-ness. */ | |
2946 | if (flag_mudflap && mf_marked_p (*tp)) | |
2947 | mf_mark (new); | |
9f63daea | 2948 | |
4038c495 GB |
2949 | CONSTRUCTOR_ELTS (new) = VEC_copy (constructor_elt, gc, |
2950 | CONSTRUCTOR_ELTS (*tp)); | |
2951 | *tp = new; | |
2952 | } | |
6615c446 | 2953 | else if (TREE_CODE_CLASS (code) == tcc_type) |
d4e4baa9 | 2954 | *walk_subtrees = 0; |
6615c446 | 2955 | else if (TREE_CODE_CLASS (code) == tcc_declaration) |
6de9cd9a | 2956 | *walk_subtrees = 0; |
a396f8ae GK |
2957 | else if (TREE_CODE_CLASS (code) == tcc_constant) |
2958 | *walk_subtrees = 0; | |
1e128c5f GB |
2959 | else |
2960 | gcc_assert (code != STATEMENT_LIST); | |
d4e4baa9 AO |
2961 | return NULL_TREE; |
2962 | } | |
2963 | ||
2964 | /* The SAVE_EXPR pointed to by TP is being copied. If ST contains | |
aa4a53af | 2965 | information indicating to what new SAVE_EXPR this one should be mapped, |
e21aff8a SB |
2966 | use that one. Otherwise, create a new node and enter it in ST. FN is |
2967 | the function into which the copy will be placed. */ | |
d4e4baa9 | 2968 | |
892c7e1e | 2969 | static void |
82c82743 | 2970 | remap_save_expr (tree *tp, void *st_, int *walk_subtrees) |
d4e4baa9 | 2971 | { |
6be42dd4 RG |
2972 | struct pointer_map_t *st = (struct pointer_map_t *) st_; |
2973 | tree *n; | |
5e20bdd7 | 2974 | tree t; |
d4e4baa9 AO |
2975 | |
2976 | /* See if we already encountered this SAVE_EXPR. */ | |
6be42dd4 | 2977 | n = (tree *) pointer_map_contains (st, *tp); |
d92b4486 | 2978 | |
d4e4baa9 AO |
2979 | /* If we didn't already remap this SAVE_EXPR, do so now. */ |
2980 | if (!n) | |
2981 | { | |
5e20bdd7 | 2982 | t = copy_node (*tp); |
d4e4baa9 | 2983 | |
d4e4baa9 | 2984 | /* Remember this SAVE_EXPR. */ |
6be42dd4 | 2985 | *pointer_map_insert (st, *tp) = t; |
350ebd54 | 2986 | /* Make sure we don't remap an already-remapped SAVE_EXPR. */ |
6be42dd4 | 2987 | *pointer_map_insert (st, t) = t; |
d4e4baa9 AO |
2988 | } |
2989 | else | |
5e20bdd7 JZ |
2990 | { |
2991 | /* We've already walked into this SAVE_EXPR; don't do it again. */ | |
2992 | *walk_subtrees = 0; | |
6be42dd4 | 2993 | t = *n; |
5e20bdd7 | 2994 | } |
d4e4baa9 AO |
2995 | |
2996 | /* Replace this SAVE_EXPR with the copy. */ | |
5e20bdd7 | 2997 | *tp = t; |
d4e4baa9 | 2998 | } |
d436bff8 | 2999 | |
aa4a53af RK |
3000 | /* Called via walk_tree. If *TP points to a DECL_STMT for a local label, |
3001 | copies the declaration and enters it in the splay_tree in DATA (which is | |
1b369fae | 3002 | really an `copy_body_data *'). */ |
6de9cd9a DN |
3003 | |
3004 | static tree | |
3005 | mark_local_for_remap_r (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED, | |
3006 | void *data) | |
3007 | { | |
1b369fae | 3008 | copy_body_data *id = (copy_body_data *) data; |
6de9cd9a DN |
3009 | |
3010 | /* Don't walk into types. */ | |
350fae66 RK |
3011 | if (TYPE_P (*tp)) |
3012 | *walk_subtrees = 0; | |
6de9cd9a | 3013 | |
350fae66 | 3014 | else if (TREE_CODE (*tp) == LABEL_EXPR) |
6de9cd9a | 3015 | { |
350fae66 | 3016 | tree decl = TREE_OPERAND (*tp, 0); |
6de9cd9a | 3017 | |
350fae66 | 3018 | /* Copy the decl and remember the copy. */ |
1b369fae | 3019 | insert_decl_map (id, decl, id->copy_decl (decl, id)); |
6de9cd9a DN |
3020 | } |
3021 | ||
3022 | return NULL_TREE; | |
3023 | } | |
3024 | ||
19114537 EC |
3025 | /* Perform any modifications to EXPR required when it is unsaved. Does |
3026 | not recurse into EXPR's subtrees. */ | |
3027 | ||
3028 | static void | |
3029 | unsave_expr_1 (tree expr) | |
3030 | { | |
3031 | switch (TREE_CODE (expr)) | |
3032 | { | |
3033 | case TARGET_EXPR: | |
3034 | /* Don't mess with a TARGET_EXPR that hasn't been expanded. | |
3035 | It's OK for this to happen if it was part of a subtree that | |
3036 | isn't immediately expanded, such as operand 2 of another | |
3037 | TARGET_EXPR. */ | |
3038 | if (TREE_OPERAND (expr, 1)) | |
3039 | break; | |
3040 | ||
3041 | TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3); | |
3042 | TREE_OPERAND (expr, 3) = NULL_TREE; | |
3043 | break; | |
3044 | ||
3045 | default: | |
3046 | break; | |
3047 | } | |
3048 | } | |
3049 | ||
6de9cd9a DN |
3050 | /* Called via walk_tree when an expression is unsaved. Using the |
3051 | splay_tree pointed to by ST (which is really a `splay_tree'), | |
3052 | remaps all local declarations to appropriate replacements. */ | |
d436bff8 AH |
3053 | |
3054 | static tree | |
6de9cd9a | 3055 | unsave_r (tree *tp, int *walk_subtrees, void *data) |
d436bff8 | 3056 | { |
1b369fae | 3057 | copy_body_data *id = (copy_body_data *) data; |
6be42dd4 RG |
3058 | struct pointer_map_t *st = id->decl_map; |
3059 | tree *n; | |
6de9cd9a DN |
3060 | |
3061 | /* Only a local declaration (variable or label). */ | |
3062 | if ((TREE_CODE (*tp) == VAR_DECL && !TREE_STATIC (*tp)) | |
3063 | || TREE_CODE (*tp) == LABEL_DECL) | |
3064 | { | |
3065 | /* Lookup the declaration. */ | |
6be42dd4 | 3066 | n = (tree *) pointer_map_contains (st, *tp); |
9f63daea | 3067 | |
6de9cd9a DN |
3068 | /* If it's there, remap it. */ |
3069 | if (n) | |
6be42dd4 | 3070 | *tp = *n; |
6de9cd9a | 3071 | } |
aa4a53af | 3072 | |
6de9cd9a DN |
3073 | else if (TREE_CODE (*tp) == STATEMENT_LIST) |
3074 | copy_statement_list (tp); | |
3075 | else if (TREE_CODE (*tp) == BIND_EXPR) | |
3076 | copy_bind_expr (tp, walk_subtrees, id); | |
3077 | else if (TREE_CODE (*tp) == SAVE_EXPR) | |
82c82743 | 3078 | remap_save_expr (tp, st, walk_subtrees); |
d436bff8 | 3079 | else |
6de9cd9a DN |
3080 | { |
3081 | copy_tree_r (tp, walk_subtrees, NULL); | |
3082 | ||
3083 | /* Do whatever unsaving is required. */ | |
3084 | unsave_expr_1 (*tp); | |
3085 | } | |
3086 | ||
3087 | /* Keep iterating. */ | |
3088 | return NULL_TREE; | |
d436bff8 AH |
3089 | } |
3090 | ||
19114537 EC |
3091 | /* Copies everything in EXPR and replaces variables, labels |
3092 | and SAVE_EXPRs local to EXPR. */ | |
6de9cd9a DN |
3093 | |
3094 | tree | |
19114537 | 3095 | unsave_expr_now (tree expr) |
6de9cd9a | 3096 | { |
1b369fae | 3097 | copy_body_data id; |
6de9cd9a DN |
3098 | |
3099 | /* There's nothing to do for NULL_TREE. */ | |
3100 | if (expr == 0) | |
3101 | return expr; | |
3102 | ||
3103 | /* Set up ID. */ | |
3104 | memset (&id, 0, sizeof (id)); | |
1b369fae RH |
3105 | id.src_fn = current_function_decl; |
3106 | id.dst_fn = current_function_decl; | |
6be42dd4 | 3107 | id.decl_map = pointer_map_create (); |
6de9cd9a | 3108 | |
1b369fae RH |
3109 | id.copy_decl = copy_decl_no_change; |
3110 | id.transform_call_graph_edges = CB_CGE_DUPLICATE; | |
3111 | id.transform_new_cfg = false; | |
3112 | id.transform_return_to_modify = false; | |
3113 | id.transform_lang_insert_block = false; | |
3114 | ||
6de9cd9a DN |
3115 | /* Walk the tree once to find local labels. */ |
3116 | walk_tree_without_duplicates (&expr, mark_local_for_remap_r, &id); | |
3117 | ||
3118 | /* Walk the tree again, copying, remapping, and unsaving. */ | |
3119 | walk_tree (&expr, unsave_r, &id, NULL); | |
3120 | ||
3121 | /* Clean up. */ | |
6be42dd4 | 3122 | pointer_map_destroy (id.decl_map); |
6de9cd9a DN |
3123 | |
3124 | return expr; | |
3125 | } | |
3126 | ||
3127 | /* Allow someone to determine if SEARCH is a child of TOP from gdb. */ | |
aa4a53af | 3128 | |
6de9cd9a DN |
3129 | static tree |
3130 | debug_find_tree_1 (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED, void *data) | |
3131 | { | |
3132 | if (*tp == data) | |
3133 | return (tree) data; | |
3134 | else | |
3135 | return NULL; | |
3136 | } | |
3137 | ||
6de9cd9a DN |
3138 | bool |
3139 | debug_find_tree (tree top, tree search) | |
3140 | { | |
3141 | return walk_tree_without_duplicates (&top, debug_find_tree_1, search) != 0; | |
3142 | } | |
3143 | ||
e21aff8a | 3144 | |
6de9cd9a DN |
3145 | /* Declare the variables created by the inliner. Add all the variables in |
3146 | VARS to BIND_EXPR. */ | |
3147 | ||
3148 | static void | |
e21aff8a | 3149 | declare_inline_vars (tree block, tree vars) |
6de9cd9a | 3150 | { |
84936f6f RH |
3151 | tree t; |
3152 | for (t = vars; t; t = TREE_CHAIN (t)) | |
9659ce8b JH |
3153 | { |
3154 | DECL_SEEN_IN_BIND_EXPR_P (t) = 1; | |
3155 | gcc_assert (!TREE_STATIC (t) && !TREE_ASM_WRITTEN (t)); | |
3156 | cfun->unexpanded_var_list = | |
3157 | tree_cons (NULL_TREE, t, | |
3158 | cfun->unexpanded_var_list); | |
3159 | } | |
6de9cd9a | 3160 | |
e21aff8a SB |
3161 | if (block) |
3162 | BLOCK_VARS (block) = chainon (BLOCK_VARS (block), vars); | |
3163 | } | |
3164 | ||
19734dd8 RL |
3165 | |
3166 | /* Copy NODE (which must be a DECL). The DECL originally was in the FROM_FN, | |
1b369fae RH |
3167 | but now it will be in the TO_FN. PARM_TO_VAR means enable PARM_DECL to |
3168 | VAR_DECL translation. */ | |
19734dd8 | 3169 | |
1b369fae RH |
3170 | static tree |
3171 | copy_decl_for_dup_finish (copy_body_data *id, tree decl, tree copy) | |
19734dd8 | 3172 | { |
19734dd8 RL |
3173 | /* Don't generate debug information for the copy if we wouldn't have |
3174 | generated it for the copy either. */ | |
3175 | DECL_ARTIFICIAL (copy) = DECL_ARTIFICIAL (decl); | |
3176 | DECL_IGNORED_P (copy) = DECL_IGNORED_P (decl); | |
3177 | ||
3178 | /* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what | |
3179 | declaration inspired this copy. */ | |
3180 | DECL_ABSTRACT_ORIGIN (copy) = DECL_ORIGIN (decl); | |
3181 | ||
3182 | /* The new variable/label has no RTL, yet. */ | |
68a976f2 RL |
3183 | if (CODE_CONTAINS_STRUCT (TREE_CODE (copy), TS_DECL_WRTL) |
3184 | && !TREE_STATIC (copy) && !DECL_EXTERNAL (copy)) | |
19734dd8 RL |
3185 | SET_DECL_RTL (copy, NULL_RTX); |
3186 | ||
3187 | /* These args would always appear unused, if not for this. */ | |
3188 | TREE_USED (copy) = 1; | |
3189 | ||
3190 | /* Set the context for the new declaration. */ | |
3191 | if (!DECL_CONTEXT (decl)) | |
3192 | /* Globals stay global. */ | |
3193 | ; | |
1b369fae | 3194 | else if (DECL_CONTEXT (decl) != id->src_fn) |
19734dd8 RL |
3195 | /* Things that weren't in the scope of the function we're inlining |
3196 | from aren't in the scope we're inlining to, either. */ | |
3197 | ; | |
3198 | else if (TREE_STATIC (decl)) | |
3199 | /* Function-scoped static variables should stay in the original | |
3200 | function. */ | |
3201 | ; | |
3202 | else | |
3203 | /* Ordinary automatic local variables are now in the scope of the | |
3204 | new function. */ | |
1b369fae | 3205 | DECL_CONTEXT (copy) = id->dst_fn; |
19734dd8 RL |
3206 | |
3207 | return copy; | |
3208 | } | |
3209 | ||
1b369fae RH |
3210 | static tree |
3211 | copy_decl_to_var (tree decl, copy_body_data *id) | |
3212 | { | |
3213 | tree copy, type; | |
3214 | ||
3215 | gcc_assert (TREE_CODE (decl) == PARM_DECL | |
3216 | || TREE_CODE (decl) == RESULT_DECL); | |
3217 | ||
3218 | type = TREE_TYPE (decl); | |
3219 | ||
3220 | copy = build_decl (VAR_DECL, DECL_NAME (decl), type); | |
3221 | TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl); | |
3222 | TREE_READONLY (copy) = TREE_READONLY (decl); | |
3223 | TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl); | |
0890b981 | 3224 | DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl); |
058dcc25 | 3225 | DECL_NO_TBAA_P (copy) = DECL_NO_TBAA_P (decl); |
1b369fae RH |
3226 | |
3227 | return copy_decl_for_dup_finish (id, decl, copy); | |
3228 | } | |
3229 | ||
c08cd4c1 JM |
3230 | /* Like copy_decl_to_var, but create a return slot object instead of a |
3231 | pointer variable for return by invisible reference. */ | |
3232 | ||
3233 | static tree | |
3234 | copy_result_decl_to_var (tree decl, copy_body_data *id) | |
3235 | { | |
3236 | tree copy, type; | |
3237 | ||
3238 | gcc_assert (TREE_CODE (decl) == PARM_DECL | |
3239 | || TREE_CODE (decl) == RESULT_DECL); | |
3240 | ||
3241 | type = TREE_TYPE (decl); | |
3242 | if (DECL_BY_REFERENCE (decl)) | |
3243 | type = TREE_TYPE (type); | |
3244 | ||
3245 | copy = build_decl (VAR_DECL, DECL_NAME (decl), type); | |
3246 | TREE_READONLY (copy) = TREE_READONLY (decl); | |
3247 | TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl); | |
3248 | if (!DECL_BY_REFERENCE (decl)) | |
3249 | { | |
3250 | TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl); | |
0890b981 | 3251 | DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl); |
058dcc25 | 3252 | DECL_NO_TBAA_P (copy) = DECL_NO_TBAA_P (decl); |
c08cd4c1 JM |
3253 | } |
3254 | ||
3255 | return copy_decl_for_dup_finish (id, decl, copy); | |
3256 | } | |
3257 | ||
3258 | ||
1b369fae RH |
3259 | static tree |
3260 | copy_decl_no_change (tree decl, copy_body_data *id) | |
3261 | { | |
3262 | tree copy; | |
3263 | ||
3264 | copy = copy_node (decl); | |
3265 | ||
3266 | /* The COPY is not abstract; it will be generated in DST_FN. */ | |
3267 | DECL_ABSTRACT (copy) = 0; | |
3268 | lang_hooks.dup_lang_specific_decl (copy); | |
3269 | ||
3270 | /* TREE_ADDRESSABLE isn't used to indicate that a label's address has | |
3271 | been taken; it's for internal bookkeeping in expand_goto_internal. */ | |
3272 | if (TREE_CODE (copy) == LABEL_DECL) | |
3273 | { | |
3274 | TREE_ADDRESSABLE (copy) = 0; | |
3275 | LABEL_DECL_UID (copy) = -1; | |
3276 | } | |
3277 | ||
3278 | return copy_decl_for_dup_finish (id, decl, copy); | |
3279 | } | |
3280 | ||
3281 | static tree | |
3282 | copy_decl_maybe_to_var (tree decl, copy_body_data *id) | |
3283 | { | |
3284 | if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == RESULT_DECL) | |
3285 | return copy_decl_to_var (decl, id); | |
3286 | else | |
3287 | return copy_decl_no_change (decl, id); | |
3288 | } | |
3289 | ||
19734dd8 RL |
3290 | /* Return a copy of the function's argument tree. */ |
3291 | static tree | |
1b369fae | 3292 | copy_arguments_for_versioning (tree orig_parm, copy_body_data * id) |
19734dd8 RL |
3293 | { |
3294 | tree *arg_copy, *parg; | |
3295 | ||
3296 | arg_copy = &orig_parm; | |
3297 | for (parg = arg_copy; *parg; parg = &TREE_CHAIN (*parg)) | |
3298 | { | |
3299 | tree new = remap_decl (*parg, id); | |
3300 | lang_hooks.dup_lang_specific_decl (new); | |
3301 | TREE_CHAIN (new) = TREE_CHAIN (*parg); | |
3302 | *parg = new; | |
3303 | } | |
3304 | return orig_parm; | |
3305 | } | |
3306 | ||
3307 | /* Return a copy of the function's static chain. */ | |
3308 | static tree | |
1b369fae | 3309 | copy_static_chain (tree static_chain, copy_body_data * id) |
19734dd8 RL |
3310 | { |
3311 | tree *chain_copy, *pvar; | |
3312 | ||
3313 | chain_copy = &static_chain; | |
3314 | for (pvar = chain_copy; *pvar; pvar = &TREE_CHAIN (*pvar)) | |
3315 | { | |
3316 | tree new = remap_decl (*pvar, id); | |
3317 | lang_hooks.dup_lang_specific_decl (new); | |
3318 | TREE_CHAIN (new) = TREE_CHAIN (*pvar); | |
3319 | *pvar = new; | |
3320 | } | |
3321 | return static_chain; | |
3322 | } | |
3323 | ||
3324 | /* Return true if the function is allowed to be versioned. | |
3325 | This is a guard for the versioning functionality. */ | |
3326 | bool | |
3327 | tree_versionable_function_p (tree fndecl) | |
3328 | { | |
3329 | if (fndecl == NULL_TREE) | |
3330 | return false; | |
3331 | /* ??? There are cases where a function is | |
3332 | uninlinable but can be versioned. */ | |
3333 | if (!tree_inlinable_function_p (fndecl)) | |
3334 | return false; | |
3335 | ||
3336 | return true; | |
3337 | } | |
3338 | ||
3339 | /* Create a copy of a function's tree. | |
3340 | OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes | |
3341 | of the original function and the new copied function | |
3342 | respectively. In case we want to replace a DECL | |
3343 | tree with another tree while duplicating the function's | |
3344 | body, TREE_MAP represents the mapping between these | |
ea99e0be JH |
3345 | trees. If UPDATE_CLONES is set, the call_stmt fields |
3346 | of edges of clones of the function will be updated. */ | |
19734dd8 | 3347 | void |
ea99e0be JH |
3348 | tree_function_versioning (tree old_decl, tree new_decl, varray_type tree_map, |
3349 | bool update_clones) | |
19734dd8 RL |
3350 | { |
3351 | struct cgraph_node *old_version_node; | |
3352 | struct cgraph_node *new_version_node; | |
1b369fae | 3353 | copy_body_data id; |
110cfe1c | 3354 | tree p; |
19734dd8 RL |
3355 | unsigned i; |
3356 | struct ipa_replace_map *replace_info; | |
3357 | basic_block old_entry_block; | |
3358 | tree t_step; | |
873aa8f5 | 3359 | tree old_current_function_decl = current_function_decl; |
19734dd8 RL |
3360 | |
3361 | gcc_assert (TREE_CODE (old_decl) == FUNCTION_DECL | |
3362 | && TREE_CODE (new_decl) == FUNCTION_DECL); | |
3363 | DECL_POSSIBLY_INLINED (old_decl) = 1; | |
3364 | ||
3365 | old_version_node = cgraph_node (old_decl); | |
3366 | new_version_node = cgraph_node (new_decl); | |
3367 | ||
19734dd8 RL |
3368 | DECL_ARTIFICIAL (new_decl) = 1; |
3369 | DECL_ABSTRACT_ORIGIN (new_decl) = DECL_ORIGIN (old_decl); | |
3370 | ||
3d283195 JH |
3371 | /* Prepare the data structures for the tree copy. */ |
3372 | memset (&id, 0, sizeof (id)); | |
3373 | ||
19734dd8 | 3374 | /* Generate a new name for the new version. */ |
ea99e0be | 3375 | if (!update_clones) |
19734dd8 | 3376 | { |
95c8e172 RL |
3377 | DECL_NAME (new_decl) = create_tmp_var_name (NULL); |
3378 | SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl)); | |
3379 | SET_DECL_RTL (new_decl, NULL_RTX); | |
3d283195 | 3380 | id.statements_to_fold = pointer_set_create (); |
19734dd8 | 3381 | } |
19734dd8 | 3382 | |
6be42dd4 | 3383 | id.decl_map = pointer_map_create (); |
1b369fae RH |
3384 | id.src_fn = old_decl; |
3385 | id.dst_fn = new_decl; | |
3386 | id.src_node = old_version_node; | |
3387 | id.dst_node = new_version_node; | |
3388 | id.src_cfun = DECL_STRUCT_FUNCTION (old_decl); | |
19734dd8 | 3389 | |
1b369fae RH |
3390 | id.copy_decl = copy_decl_no_change; |
3391 | id.transform_call_graph_edges | |
3392 | = update_clones ? CB_CGE_MOVE_CLONES : CB_CGE_MOVE; | |
3393 | id.transform_new_cfg = true; | |
3394 | id.transform_return_to_modify = false; | |
3395 | id.transform_lang_insert_block = false; | |
3396 | ||
19734dd8 | 3397 | current_function_decl = new_decl; |
110cfe1c JH |
3398 | old_entry_block = ENTRY_BLOCK_PTR_FOR_FUNCTION |
3399 | (DECL_STRUCT_FUNCTION (old_decl)); | |
3400 | initialize_cfun (new_decl, old_decl, | |
3401 | old_entry_block->count, | |
3402 | old_entry_block->frequency); | |
3403 | push_cfun (DECL_STRUCT_FUNCTION (new_decl)); | |
19734dd8 RL |
3404 | |
3405 | /* Copy the function's static chain. */ | |
3406 | p = DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl; | |
3407 | if (p) | |
3408 | DECL_STRUCT_FUNCTION (new_decl)->static_chain_decl = | |
3409 | copy_static_chain (DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl, | |
3410 | &id); | |
3411 | /* Copy the function's arguments. */ | |
3412 | if (DECL_ARGUMENTS (old_decl) != NULL_TREE) | |
3413 | DECL_ARGUMENTS (new_decl) = | |
3414 | copy_arguments_for_versioning (DECL_ARGUMENTS (old_decl), &id); | |
3415 | ||
3416 | /* If there's a tree_map, prepare for substitution. */ | |
3417 | if (tree_map) | |
3418 | for (i = 0; i < VARRAY_ACTIVE_SIZE (tree_map); i++) | |
3419 | { | |
3420 | replace_info = VARRAY_GENERIC_PTR (tree_map, i); | |
1b369fae | 3421 | if (replace_info->replace_p) |
19734dd8 RL |
3422 | insert_decl_map (&id, replace_info->old_tree, |
3423 | replace_info->new_tree); | |
19734dd8 RL |
3424 | } |
3425 | ||
1b369fae | 3426 | DECL_INITIAL (new_decl) = remap_blocks (DECL_INITIAL (id.src_fn), &id); |
19734dd8 RL |
3427 | |
3428 | /* Renumber the lexical scoping (non-code) blocks consecutively. */ | |
1b369fae | 3429 | number_blocks (id.dst_fn); |
19734dd8 RL |
3430 | |
3431 | if (DECL_STRUCT_FUNCTION (old_decl)->unexpanded_var_list != NULL_TREE) | |
3432 | /* Add local vars. */ | |
3433 | for (t_step = DECL_STRUCT_FUNCTION (old_decl)->unexpanded_var_list; | |
3434 | t_step; t_step = TREE_CHAIN (t_step)) | |
3435 | { | |
3436 | tree var = TREE_VALUE (t_step); | |
3437 | if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var)) | |
3438 | cfun->unexpanded_var_list = tree_cons (NULL_TREE, var, | |
3439 | cfun->unexpanded_var_list); | |
3440 | else | |
3441 | cfun->unexpanded_var_list = | |
3442 | tree_cons (NULL_TREE, remap_decl (var, &id), | |
3443 | cfun->unexpanded_var_list); | |
3444 | } | |
3445 | ||
3446 | /* Copy the Function's body. */ | |
110cfe1c | 3447 | copy_body (&id, old_entry_block->count, old_entry_block->frequency, ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR); |
19734dd8 | 3448 | |
19734dd8 RL |
3449 | if (DECL_RESULT (old_decl) != NULL_TREE) |
3450 | { | |
3451 | tree *res_decl = &DECL_RESULT (old_decl); | |
3452 | DECL_RESULT (new_decl) = remap_decl (*res_decl, &id); | |
3453 | lang_hooks.dup_lang_specific_decl (DECL_RESULT (new_decl)); | |
3454 | } | |
3455 | ||
19734dd8 RL |
3456 | /* Renumber the lexical scoping (non-code) blocks consecutively. */ |
3457 | number_blocks (new_decl); | |
3458 | ||
3459 | /* Clean up. */ | |
6be42dd4 | 3460 | pointer_map_destroy (id.decl_map); |
3d283195 JH |
3461 | if (!update_clones) |
3462 | { | |
3463 | fold_marked_statements (0, id.statements_to_fold); | |
3464 | pointer_set_destroy (id.statements_to_fold); | |
3465 | fold_cond_expr_cond (); | |
3466 | } | |
110cfe1c JH |
3467 | if (gimple_in_ssa_p (cfun)) |
3468 | { | |
3e87758a RL |
3469 | free_dominance_info (CDI_DOMINATORS); |
3470 | free_dominance_info (CDI_POST_DOMINATORS); | |
3d283195 JH |
3471 | if (!update_clones) |
3472 | delete_unreachable_blocks (); | |
110cfe1c | 3473 | update_ssa (TODO_update_ssa); |
3d283195 JH |
3474 | if (!update_clones) |
3475 | { | |
3476 | fold_cond_expr_cond (); | |
3477 | if (need_ssa_update_p ()) | |
3478 | update_ssa (TODO_update_ssa); | |
3479 | } | |
110cfe1c JH |
3480 | } |
3481 | free_dominance_info (CDI_DOMINATORS); | |
3482 | free_dominance_info (CDI_POST_DOMINATORS); | |
3483 | pop_cfun (); | |
873aa8f5 JH |
3484 | current_function_decl = old_current_function_decl; |
3485 | gcc_assert (!current_function_decl | |
3486 | || DECL_STRUCT_FUNCTION (current_function_decl) == cfun); | |
19734dd8 RL |
3487 | return; |
3488 | } | |
3489 | ||
52dd234b RH |
3490 | /* Duplicate a type, fields and all. */ |
3491 | ||
3492 | tree | |
3493 | build_duplicate_type (tree type) | |
3494 | { | |
1b369fae | 3495 | struct copy_body_data id; |
52dd234b RH |
3496 | |
3497 | memset (&id, 0, sizeof (id)); | |
1b369fae RH |
3498 | id.src_fn = current_function_decl; |
3499 | id.dst_fn = current_function_decl; | |
3500 | id.src_cfun = cfun; | |
6be42dd4 | 3501 | id.decl_map = pointer_map_create (); |
52dd234b RH |
3502 | |
3503 | type = remap_type_1 (type, &id); | |
3504 | ||
6be42dd4 | 3505 | pointer_map_destroy (id.decl_map); |
52dd234b RH |
3506 | |
3507 | return type; | |
3508 | } |