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Commit | Line | Data |
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ac534736 | 1 | /* Tree inlining. |
20f06221 | 2 | Copyright 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
588d3ade AO |
3 | Contributed by Alexandre Oliva <aoliva@redhat.com> |
4 | ||
54a7b573 | 5 | This file is part of GCC. |
588d3ade | 6 | |
54a7b573 | 7 | GCC is free software; you can redistribute it and/or modify |
588d3ade AO |
8 | it under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
54a7b573 | 12 | GCC is distributed in the hope that it will be useful, |
588d3ade AO |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
54a7b573 | 18 | along with GCC; see the file COPYING. If not, write to |
366ccddb KC |
19 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
588d3ade AO |
21 | |
22 | #include "config.h" | |
23 | #include "system.h" | |
4977bab6 ZW |
24 | #include "coretypes.h" |
25 | #include "tm.h" | |
69dcadff | 26 | #include "toplev.h" |
588d3ade AO |
27 | #include "tree.h" |
28 | #include "tree-inline.h" | |
d4e4baa9 AO |
29 | #include "rtl.h" |
30 | #include "expr.h" | |
31 | #include "flags.h" | |
32 | #include "params.h" | |
33 | #include "input.h" | |
34 | #include "insn-config.h" | |
d4e4baa9 AO |
35 | #include "varray.h" |
36 | #include "hashtab.h" | |
d23c55c2 | 37 | #include "langhooks.h" |
e21aff8a SB |
38 | #include "basic-block.h" |
39 | #include "tree-iterator.h" | |
1c4a429a | 40 | #include "cgraph.h" |
ddd2d57e | 41 | #include "intl.h" |
6de9cd9a | 42 | #include "tree-mudflap.h" |
089efaa4 | 43 | #include "tree-flow.h" |
18c6ada9 | 44 | #include "function.h" |
e21aff8a SB |
45 | #include "ggc.h" |
46 | #include "tree-flow.h" | |
6de9cd9a | 47 | #include "diagnostic.h" |
e21aff8a | 48 | #include "except.h" |
1eb3331e | 49 | #include "debug.h" |
e21aff8a | 50 | #include "pointer-set.h" |
19734dd8 | 51 | #include "ipa-prop.h" |
d4e4baa9 | 52 | |
6de9cd9a DN |
53 | /* I'm not real happy about this, but we need to handle gimple and |
54 | non-gimple trees. */ | |
eadf906f | 55 | #include "tree-gimple.h" |
588d3ade | 56 | |
1b369fae | 57 | /* Inlining, Cloning, Versioning, Parallelization |
e21aff8a SB |
58 | |
59 | Inlining: a function body is duplicated, but the PARM_DECLs are | |
60 | remapped into VAR_DECLs, and non-void RETURN_EXPRs become | |
61 | MODIFY_EXPRs that store to a dedicated returned-value variable. | |
62 | The duplicated eh_region info of the copy will later be appended | |
63 | to the info for the caller; the eh_region info in copied throwing | |
64 | statements and RESX_EXPRs is adjusted accordingly. | |
65 | ||
e21aff8a SB |
66 | Cloning: (only in C++) We have one body for a con/de/structor, and |
67 | multiple function decls, each with a unique parameter list. | |
68 | Duplicate the body, using the given splay tree; some parameters | |
69 | will become constants (like 0 or 1). | |
70 | ||
1b369fae RH |
71 | Versioning: a function body is duplicated and the result is a new |
72 | function rather than into blocks of an existing function as with | |
73 | inlining. Some parameters will become constants. | |
74 | ||
75 | Parallelization: a region of a function is duplicated resulting in | |
76 | a new function. Variables may be replaced with complex expressions | |
77 | to enable shared variable semantics. | |
78 | ||
e21aff8a SB |
79 | All of these will simultaneously lookup any callgraph edges. If |
80 | we're going to inline the duplicated function body, and the given | |
81 | function has some cloned callgraph nodes (one for each place this | |
82 | function will be inlined) those callgraph edges will be duplicated. | |
1b369fae | 83 | If we're cloning the body, those callgraph edges will be |
e21aff8a SB |
84 | updated to point into the new body. (Note that the original |
85 | callgraph node and edge list will not be altered.) | |
86 | ||
87 | See the CALL_EXPR handling case in copy_body_r (). */ | |
88 | ||
588d3ade | 89 | /* 0 if we should not perform inlining. |
d92b4486 KH |
90 | 1 if we should expand functions calls inline at the tree level. |
91 | 2 if we should consider *all* functions to be inline | |
588d3ade AO |
92 | candidates. */ |
93 | ||
94 | int flag_inline_trees = 0; | |
d4e4baa9 AO |
95 | |
96 | /* To Do: | |
97 | ||
98 | o In order to make inlining-on-trees work, we pessimized | |
99 | function-local static constants. In particular, they are now | |
100 | always output, even when not addressed. Fix this by treating | |
101 | function-local static constants just like global static | |
102 | constants; the back-end already knows not to output them if they | |
103 | are not needed. | |
104 | ||
105 | o Provide heuristics to clamp inlining of recursive template | |
106 | calls? */ | |
107 | ||
d4e4baa9 AO |
108 | /* Prototypes. */ |
109 | ||
1b369fae RH |
110 | static tree declare_return_variable (copy_body_data *, tree, tree, tree *); |
111 | static tree copy_generic_body (copy_body_data *); | |
b3c3af2f | 112 | static bool inlinable_function_p (tree); |
1b369fae RH |
113 | static void remap_block (tree *, copy_body_data *); |
114 | static tree remap_decls (tree, copy_body_data *); | |
115 | static void copy_bind_expr (tree *, int *, copy_body_data *); | |
6de9cd9a | 116 | static tree mark_local_for_remap_r (tree *, int *, void *); |
19114537 | 117 | static void unsave_expr_1 (tree); |
6de9cd9a | 118 | static tree unsave_r (tree *, int *, void *); |
e21aff8a | 119 | static void declare_inline_vars (tree, tree); |
892c7e1e | 120 | static void remap_save_expr (tree *, void *, int *); |
acb8f212 | 121 | static void add_lexical_block (tree current_block, tree new_block); |
1b369fae RH |
122 | static tree copy_decl_to_var (tree, copy_body_data *); |
123 | static tree copy_decl_no_change (tree, copy_body_data *); | |
124 | static tree copy_decl_maybe_to_var (tree, copy_body_data *); | |
e21aff8a | 125 | |
5e20bdd7 JZ |
126 | /* Insert a tree->tree mapping for ID. Despite the name suggests |
127 | that the trees should be variables, it is used for more than that. */ | |
128 | ||
1b369fae RH |
129 | void |
130 | insert_decl_map (copy_body_data *id, tree key, tree value) | |
5e20bdd7 JZ |
131 | { |
132 | splay_tree_insert (id->decl_map, (splay_tree_key) key, | |
133 | (splay_tree_value) value); | |
134 | ||
135 | /* Always insert an identity map as well. If we see this same new | |
136 | node again, we won't want to duplicate it a second time. */ | |
137 | if (key != value) | |
138 | splay_tree_insert (id->decl_map, (splay_tree_key) value, | |
139 | (splay_tree_value) value); | |
140 | } | |
141 | ||
e21aff8a | 142 | /* Remap DECL during the copying of the BLOCK tree for the function. */ |
d4e4baa9 | 143 | |
1b369fae RH |
144 | tree |
145 | remap_decl (tree decl, copy_body_data *id) | |
d4e4baa9 | 146 | { |
e21aff8a SB |
147 | splay_tree_node n; |
148 | tree fn; | |
149 | ||
150 | /* We only remap local variables in the current function. */ | |
1b369fae | 151 | fn = id->src_fn; |
3c2a7a6a | 152 | |
e21aff8a SB |
153 | /* See if we have remapped this declaration. */ |
154 | ||
155 | n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl); | |
156 | ||
157 | /* If we didn't already have an equivalent for this declaration, | |
158 | create one now. */ | |
d4e4baa9 AO |
159 | if (!n) |
160 | { | |
d4e4baa9 | 161 | /* Make a copy of the variable or label. */ |
1b369fae | 162 | tree t = id->copy_decl (decl, id); |
19734dd8 | 163 | |
596b98ce AO |
164 | /* Remember it, so that if we encounter this local entity again |
165 | we can reuse this copy. Do this early because remap_type may | |
166 | need this decl for TYPE_STUB_DECL. */ | |
167 | insert_decl_map (id, decl, t); | |
168 | ||
1b369fae RH |
169 | if (!DECL_P (t)) |
170 | return t; | |
171 | ||
3c2a7a6a RH |
172 | /* Remap types, if necessary. */ |
173 | TREE_TYPE (t) = remap_type (TREE_TYPE (t), id); | |
174 | if (TREE_CODE (t) == TYPE_DECL) | |
175 | DECL_ORIGINAL_TYPE (t) = remap_type (DECL_ORIGINAL_TYPE (t), id); | |
3c2a7a6a RH |
176 | |
177 | /* Remap sizes as necessary. */ | |
178 | walk_tree (&DECL_SIZE (t), copy_body_r, id, NULL); | |
179 | walk_tree (&DECL_SIZE_UNIT (t), copy_body_r, id, NULL); | |
d4e4baa9 | 180 | |
8c27b7d4 | 181 | /* If fields, do likewise for offset and qualifier. */ |
5377d5ba RK |
182 | if (TREE_CODE (t) == FIELD_DECL) |
183 | { | |
184 | walk_tree (&DECL_FIELD_OFFSET (t), copy_body_r, id, NULL); | |
185 | if (TREE_CODE (DECL_CONTEXT (t)) == QUAL_UNION_TYPE) | |
186 | walk_tree (&DECL_QUALIFIER (t), copy_body_r, id, NULL); | |
187 | } | |
188 | ||
5e20bdd7 | 189 | return t; |
d4e4baa9 AO |
190 | } |
191 | ||
6de9cd9a | 192 | return unshare_expr ((tree) n->value); |
d4e4baa9 AO |
193 | } |
194 | ||
3c2a7a6a | 195 | static tree |
1b369fae | 196 | remap_type_1 (tree type, copy_body_data *id) |
3c2a7a6a | 197 | { |
1b369fae | 198 | splay_tree_node node; |
3c2a7a6a RH |
199 | tree new, t; |
200 | ||
1b369fae RH |
201 | if (type == NULL) |
202 | return type; | |
203 | ||
204 | /* See if we have remapped this type. */ | |
205 | node = splay_tree_lookup (id->decl_map, (splay_tree_key) type); | |
206 | if (node) | |
207 | return (tree) node->value; | |
208 | ||
209 | /* The type only needs remapping if it's variably modified. */ | |
210 | if (! variably_modified_type_p (type, id->src_fn)) | |
211 | { | |
212 | insert_decl_map (id, type, type); | |
213 | return type; | |
214 | } | |
215 | ||
ed397c43 RK |
216 | /* We do need a copy. build and register it now. If this is a pointer or |
217 | reference type, remap the designated type and make a new pointer or | |
218 | reference type. */ | |
219 | if (TREE_CODE (type) == POINTER_TYPE) | |
220 | { | |
221 | new = build_pointer_type_for_mode (remap_type (TREE_TYPE (type), id), | |
222 | TYPE_MODE (type), | |
223 | TYPE_REF_CAN_ALIAS_ALL (type)); | |
224 | insert_decl_map (id, type, new); | |
225 | return new; | |
226 | } | |
227 | else if (TREE_CODE (type) == REFERENCE_TYPE) | |
228 | { | |
229 | new = build_reference_type_for_mode (remap_type (TREE_TYPE (type), id), | |
230 | TYPE_MODE (type), | |
231 | TYPE_REF_CAN_ALIAS_ALL (type)); | |
232 | insert_decl_map (id, type, new); | |
233 | return new; | |
234 | } | |
235 | else | |
236 | new = copy_node (type); | |
237 | ||
5e20bdd7 | 238 | insert_decl_map (id, type, new); |
3c2a7a6a RH |
239 | |
240 | /* This is a new type, not a copy of an old type. Need to reassociate | |
241 | variants. We can handle everything except the main variant lazily. */ | |
242 | t = TYPE_MAIN_VARIANT (type); | |
243 | if (type != t) | |
244 | { | |
245 | t = remap_type (t, id); | |
246 | TYPE_MAIN_VARIANT (new) = t; | |
247 | TYPE_NEXT_VARIANT (new) = TYPE_MAIN_VARIANT (t); | |
248 | TYPE_NEXT_VARIANT (t) = new; | |
249 | } | |
250 | else | |
251 | { | |
252 | TYPE_MAIN_VARIANT (new) = new; | |
253 | TYPE_NEXT_VARIANT (new) = NULL; | |
254 | } | |
255 | ||
596b98ce AO |
256 | if (TYPE_STUB_DECL (type)) |
257 | TYPE_STUB_DECL (new) = remap_decl (TYPE_STUB_DECL (type), id); | |
258 | ||
3c2a7a6a RH |
259 | /* Lazily create pointer and reference types. */ |
260 | TYPE_POINTER_TO (new) = NULL; | |
261 | TYPE_REFERENCE_TO (new) = NULL; | |
262 | ||
263 | switch (TREE_CODE (new)) | |
264 | { | |
265 | case INTEGER_TYPE: | |
266 | case REAL_TYPE: | |
267 | case ENUMERAL_TYPE: | |
268 | case BOOLEAN_TYPE: | |
3c2a7a6a RH |
269 | t = TYPE_MIN_VALUE (new); |
270 | if (t && TREE_CODE (t) != INTEGER_CST) | |
271 | walk_tree (&TYPE_MIN_VALUE (new), copy_body_r, id, NULL); | |
1c9766da | 272 | |
3c2a7a6a RH |
273 | t = TYPE_MAX_VALUE (new); |
274 | if (t && TREE_CODE (t) != INTEGER_CST) | |
275 | walk_tree (&TYPE_MAX_VALUE (new), copy_body_r, id, NULL); | |
276 | return new; | |
9f63daea | 277 | |
3c2a7a6a RH |
278 | case FUNCTION_TYPE: |
279 | TREE_TYPE (new) = remap_type (TREE_TYPE (new), id); | |
280 | walk_tree (&TYPE_ARG_TYPES (new), copy_body_r, id, NULL); | |
281 | return new; | |
282 | ||
283 | case ARRAY_TYPE: | |
284 | TREE_TYPE (new) = remap_type (TREE_TYPE (new), id); | |
285 | TYPE_DOMAIN (new) = remap_type (TYPE_DOMAIN (new), id); | |
286 | break; | |
287 | ||
288 | case RECORD_TYPE: | |
289 | case UNION_TYPE: | |
290 | case QUAL_UNION_TYPE: | |
52dd234b RH |
291 | { |
292 | tree f, nf = NULL; | |
293 | ||
294 | for (f = TYPE_FIELDS (new); f ; f = TREE_CHAIN (f)) | |
295 | { | |
296 | t = remap_decl (f, id); | |
297 | DECL_CONTEXT (t) = new; | |
298 | TREE_CHAIN (t) = nf; | |
299 | nf = t; | |
300 | } | |
301 | TYPE_FIELDS (new) = nreverse (nf); | |
302 | } | |
3c2a7a6a RH |
303 | break; |
304 | ||
3c2a7a6a RH |
305 | case OFFSET_TYPE: |
306 | default: | |
307 | /* Shouldn't have been thought variable sized. */ | |
1e128c5f | 308 | gcc_unreachable (); |
3c2a7a6a RH |
309 | } |
310 | ||
311 | walk_tree (&TYPE_SIZE (new), copy_body_r, id, NULL); | |
312 | walk_tree (&TYPE_SIZE_UNIT (new), copy_body_r, id, NULL); | |
313 | ||
314 | return new; | |
315 | } | |
316 | ||
1b369fae RH |
317 | tree |
318 | remap_type (tree type, copy_body_data *id) | |
52dd234b RH |
319 | { |
320 | splay_tree_node node; | |
321 | ||
322 | if (type == NULL) | |
323 | return type; | |
324 | ||
325 | /* See if we have remapped this type. */ | |
326 | node = splay_tree_lookup (id->decl_map, (splay_tree_key) type); | |
327 | if (node) | |
328 | return (tree) node->value; | |
329 | ||
330 | /* The type only needs remapping if it's variably modified. */ | |
1b369fae | 331 | if (! variably_modified_type_p (type, id->src_fn)) |
52dd234b RH |
332 | { |
333 | insert_decl_map (id, type, type); | |
334 | return type; | |
335 | } | |
336 | ||
337 | return remap_type_1 (type, id); | |
338 | } | |
339 | ||
6de9cd9a | 340 | static tree |
1b369fae | 341 | remap_decls (tree decls, copy_body_data *id) |
d4e4baa9 | 342 | { |
6de9cd9a DN |
343 | tree old_var; |
344 | tree new_decls = NULL_TREE; | |
d4e4baa9 | 345 | |
6de9cd9a DN |
346 | /* Remap its variables. */ |
347 | for (old_var = decls; old_var; old_var = TREE_CHAIN (old_var)) | |
d4e4baa9 | 348 | { |
6de9cd9a DN |
349 | tree new_var; |
350 | ||
30be951a JH |
351 | /* We can not chain the local static declarations into the unexpanded_var_list |
352 | as we can't duplicate them or break one decl rule. Go ahead and link | |
353 | them into unexpanded_var_list. */ | |
1b369fae | 354 | if (!lang_hooks.tree_inlining.auto_var_in_fn_p (old_var, id->src_fn) |
30be951a JH |
355 | && !DECL_EXTERNAL (old_var)) |
356 | { | |
357 | cfun->unexpanded_var_list = tree_cons (NULL_TREE, old_var, | |
358 | cfun->unexpanded_var_list); | |
359 | continue; | |
360 | } | |
361 | ||
6de9cd9a DN |
362 | /* Remap the variable. */ |
363 | new_var = remap_decl (old_var, id); | |
364 | ||
365 | /* If we didn't remap this variable, so we can't mess with its | |
366 | TREE_CHAIN. If we remapped this variable to the return slot, it's | |
367 | already declared somewhere else, so don't declare it here. */ | |
368 | if (!new_var || new_var == id->retvar) | |
369 | ; | |
d4e4baa9 AO |
370 | else |
371 | { | |
1e128c5f | 372 | gcc_assert (DECL_P (new_var)); |
6de9cd9a DN |
373 | TREE_CHAIN (new_var) = new_decls; |
374 | new_decls = new_var; | |
d4e4baa9 | 375 | } |
d4e4baa9 | 376 | } |
d4e4baa9 | 377 | |
6de9cd9a DN |
378 | return nreverse (new_decls); |
379 | } | |
380 | ||
381 | /* Copy the BLOCK to contain remapped versions of the variables | |
382 | therein. And hook the new block into the block-tree. */ | |
383 | ||
384 | static void | |
1b369fae | 385 | remap_block (tree *block, copy_body_data *id) |
6de9cd9a | 386 | { |
d436bff8 AH |
387 | tree old_block; |
388 | tree new_block; | |
d436bff8 AH |
389 | tree fn; |
390 | ||
391 | /* Make the new block. */ | |
392 | old_block = *block; | |
393 | new_block = make_node (BLOCK); | |
394 | TREE_USED (new_block) = TREE_USED (old_block); | |
395 | BLOCK_ABSTRACT_ORIGIN (new_block) = old_block; | |
3e2844cb | 396 | BLOCK_SOURCE_LOCATION (new_block) = BLOCK_SOURCE_LOCATION (old_block); |
d436bff8 AH |
397 | *block = new_block; |
398 | ||
399 | /* Remap its variables. */ | |
6de9cd9a | 400 | BLOCK_VARS (new_block) = remap_decls (BLOCK_VARS (old_block), id); |
d436bff8 | 401 | |
1b369fae RH |
402 | fn = id->dst_fn; |
403 | ||
404 | if (id->transform_lang_insert_block) | |
673fda6b | 405 | lang_hooks.decls.insert_block (new_block); |
1b369fae | 406 | |
d436bff8 | 407 | /* Remember the remapped block. */ |
6de9cd9a | 408 | insert_decl_map (id, old_block, new_block); |
d4e4baa9 AO |
409 | } |
410 | ||
acb8f212 JH |
411 | /* Copy the whole block tree and root it in id->block. */ |
412 | static tree | |
1b369fae | 413 | remap_blocks (tree block, copy_body_data *id) |
acb8f212 JH |
414 | { |
415 | tree t; | |
416 | tree new = block; | |
417 | ||
418 | if (!block) | |
419 | return NULL; | |
420 | ||
421 | remap_block (&new, id); | |
422 | gcc_assert (new != block); | |
423 | for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t)) | |
424 | add_lexical_block (new, remap_blocks (t, id)); | |
425 | return new; | |
426 | } | |
427 | ||
d4e4baa9 | 428 | static void |
6de9cd9a | 429 | copy_statement_list (tree *tp) |
d4e4baa9 | 430 | { |
6de9cd9a DN |
431 | tree_stmt_iterator oi, ni; |
432 | tree new; | |
433 | ||
434 | new = alloc_stmt_list (); | |
435 | ni = tsi_start (new); | |
436 | oi = tsi_start (*tp); | |
437 | *tp = new; | |
438 | ||
439 | for (; !tsi_end_p (oi); tsi_next (&oi)) | |
440 | tsi_link_after (&ni, tsi_stmt (oi), TSI_NEW_STMT); | |
441 | } | |
d4e4baa9 | 442 | |
6de9cd9a | 443 | static void |
1b369fae | 444 | copy_bind_expr (tree *tp, int *walk_subtrees, copy_body_data *id) |
6de9cd9a DN |
445 | { |
446 | tree block = BIND_EXPR_BLOCK (*tp); | |
d4e4baa9 AO |
447 | /* Copy (and replace) the statement. */ |
448 | copy_tree_r (tp, walk_subtrees, NULL); | |
6de9cd9a DN |
449 | if (block) |
450 | { | |
451 | remap_block (&block, id); | |
452 | BIND_EXPR_BLOCK (*tp) = block; | |
453 | } | |
d4e4baa9 | 454 | |
6de9cd9a DN |
455 | if (BIND_EXPR_VARS (*tp)) |
456 | /* This will remap a lot of the same decls again, but this should be | |
457 | harmless. */ | |
458 | BIND_EXPR_VARS (*tp) = remap_decls (BIND_EXPR_VARS (*tp), id); | |
d4e4baa9 AO |
459 | } |
460 | ||
e21aff8a | 461 | /* Called from copy_body_id via walk_tree. DATA is really an |
1b369fae | 462 | `copy_body_data *'. */ |
aa4a53af | 463 | |
1b369fae | 464 | tree |
46c5ad27 | 465 | copy_body_r (tree *tp, int *walk_subtrees, void *data) |
d4e4baa9 | 466 | { |
1b369fae RH |
467 | copy_body_data *id = (copy_body_data *) data; |
468 | tree fn = id->src_fn; | |
acb8f212 | 469 | tree new_block; |
d4e4baa9 | 470 | |
e21aff8a SB |
471 | /* Begin by recognizing trees that we'll completely rewrite for the |
472 | inlining context. Our output for these trees is completely | |
473 | different from out input (e.g. RETURN_EXPR is deleted, and morphs | |
474 | into an edge). Further down, we'll handle trees that get | |
475 | duplicated and/or tweaked. */ | |
d4e4baa9 | 476 | |
1b369fae RH |
477 | /* When requested, RETURN_EXPRs should be transformed to just the |
478 | contained MODIFY_EXPR. The branch semantics of the return will | |
479 | be handled elsewhere by manipulating the CFG rather than a statement. */ | |
480 | if (TREE_CODE (*tp) == RETURN_EXPR && id->transform_return_to_modify) | |
d4e4baa9 | 481 | { |
e21aff8a | 482 | tree assignment = TREE_OPERAND (*tp, 0); |
d4e4baa9 AO |
483 | |
484 | /* If we're returning something, just turn that into an | |
e21aff8a SB |
485 | assignment into the equivalent of the original RESULT_DECL. |
486 | If the "assignment" is just the result decl, the result | |
487 | decl has already been set (e.g. a recent "foo (&result_decl, | |
488 | ...)"); just toss the entire RETURN_EXPR. */ | |
489 | if (assignment && TREE_CODE (assignment) == MODIFY_EXPR) | |
490 | { | |
491 | /* Replace the RETURN_EXPR with (a copy of) the | |
128a79fb | 492 | MODIFY_EXPR hanging underneath. */ |
e21aff8a SB |
493 | *tp = copy_node (assignment); |
494 | } | |
495 | else /* Else the RETURN_EXPR returns no value. */ | |
496 | { | |
497 | *tp = NULL; | |
cceb1885 | 498 | return (tree) (void *)1; |
e21aff8a | 499 | } |
d4e4baa9 | 500 | } |
e21aff8a | 501 | |
d4e4baa9 AO |
502 | /* Local variables and labels need to be replaced by equivalent |
503 | variables. We don't want to copy static variables; there's only | |
504 | one of those, no matter how many times we inline the containing | |
5377d5ba | 505 | function. Similarly for globals from an outer function. */ |
ae2bcd98 | 506 | else if (lang_hooks.tree_inlining.auto_var_in_fn_p (*tp, fn)) |
d4e4baa9 AO |
507 | { |
508 | tree new_decl; | |
509 | ||
510 | /* Remap the declaration. */ | |
511 | new_decl = remap_decl (*tp, id); | |
1e128c5f | 512 | gcc_assert (new_decl); |
d4e4baa9 AO |
513 | /* Replace this variable with the copy. */ |
514 | STRIP_TYPE_NOPS (new_decl); | |
515 | *tp = new_decl; | |
e4cf29ae | 516 | *walk_subtrees = 0; |
d4e4baa9 | 517 | } |
6de9cd9a DN |
518 | else if (TREE_CODE (*tp) == STATEMENT_LIST) |
519 | copy_statement_list (tp); | |
d4e4baa9 | 520 | else if (TREE_CODE (*tp) == SAVE_EXPR) |
82c82743 | 521 | remap_save_expr (tp, id->decl_map, walk_subtrees); |
17acc01a JH |
522 | else if (TREE_CODE (*tp) == LABEL_DECL |
523 | && (! DECL_CONTEXT (*tp) | |
1b369fae | 524 | || decl_function_context (*tp) == id->src_fn)) |
e21aff8a | 525 | /* These may need to be remapped for EH handling. */ |
17acc01a | 526 | *tp = remap_decl (*tp, id); |
6de9cd9a DN |
527 | else if (TREE_CODE (*tp) == BIND_EXPR) |
528 | copy_bind_expr (tp, walk_subtrees, id); | |
3c2a7a6a RH |
529 | /* Types may need remapping as well. */ |
530 | else if (TYPE_P (*tp)) | |
531 | *tp = remap_type (*tp, id); | |
532 | ||
bb04998a RK |
533 | /* If this is a constant, we have to copy the node iff the type will be |
534 | remapped. copy_tree_r will not copy a constant. */ | |
3cf11075 | 535 | else if (CONSTANT_CLASS_P (*tp)) |
bb04998a RK |
536 | { |
537 | tree new_type = remap_type (TREE_TYPE (*tp), id); | |
538 | ||
539 | if (new_type == TREE_TYPE (*tp)) | |
540 | *walk_subtrees = 0; | |
541 | ||
542 | else if (TREE_CODE (*tp) == INTEGER_CST) | |
543 | *tp = build_int_cst_wide (new_type, TREE_INT_CST_LOW (*tp), | |
544 | TREE_INT_CST_HIGH (*tp)); | |
545 | else | |
546 | { | |
547 | *tp = copy_node (*tp); | |
548 | TREE_TYPE (*tp) = new_type; | |
549 | } | |
550 | } | |
551 | ||
d4e4baa9 AO |
552 | /* Otherwise, just copy the node. Note that copy_tree_r already |
553 | knows not to copy VAR_DECLs, etc., so this is safe. */ | |
554 | else | |
555 | { | |
e21aff8a SB |
556 | /* Here we handle trees that are not completely rewritten. |
557 | First we detect some inlining-induced bogosities for | |
558 | discarding. */ | |
68594ce7 JM |
559 | if (TREE_CODE (*tp) == MODIFY_EXPR |
560 | && TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1) | |
ae2bcd98 | 561 | && (lang_hooks.tree_inlining.auto_var_in_fn_p |
68594ce7 | 562 | (TREE_OPERAND (*tp, 0), fn))) |
d4e4baa9 AO |
563 | { |
564 | /* Some assignments VAR = VAR; don't generate any rtl code | |
565 | and thus don't count as variable modification. Avoid | |
566 | keeping bogosities like 0 = 0. */ | |
567 | tree decl = TREE_OPERAND (*tp, 0), value; | |
568 | splay_tree_node n; | |
569 | ||
570 | n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl); | |
571 | if (n) | |
572 | { | |
573 | value = (tree) n->value; | |
574 | STRIP_TYPE_NOPS (value); | |
575 | if (TREE_CONSTANT (value) || TREE_READONLY_DECL_P (value)) | |
68594ce7 | 576 | { |
b03c0b93 | 577 | *tp = build_empty_stmt (); |
68594ce7 JM |
578 | return copy_body_r (tp, walk_subtrees, data); |
579 | } | |
d4e4baa9 AO |
580 | } |
581 | } | |
1b369fae | 582 | else if (TREE_CODE (*tp) == INDIRECT_REF) |
6de9cd9a DN |
583 | { |
584 | /* Get rid of *& from inline substitutions that can happen when a | |
585 | pointer argument is an ADDR_EXPR. */ | |
81cfbbc2 | 586 | tree decl = TREE_OPERAND (*tp, 0); |
6de9cd9a DN |
587 | splay_tree_node n; |
588 | ||
589 | n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl); | |
590 | if (n) | |
591 | { | |
5e13fdf7 | 592 | tree new; |
30d2e943 RG |
593 | /* If we happen to get an ADDR_EXPR in n->value, strip |
594 | it manually here as we'll eventually get ADDR_EXPRs | |
595 | which lie about their types pointed to. In this case | |
596 | build_fold_indirect_ref wouldn't strip the INDIRECT_REF, | |
095ecc24 RG |
597 | but we absolutely rely on that. As fold_indirect_ref |
598 | does other useful transformations, try that first, though. */ | |
599 | tree type = TREE_TYPE (TREE_TYPE ((tree)n->value)); | |
5e13fdf7 JH |
600 | new = unshare_expr ((tree)n->value); |
601 | *tp = fold_indirect_ref_1 (type, new); | |
095ecc24 RG |
602 | if (! *tp) |
603 | { | |
5e13fdf7 JH |
604 | if (TREE_CODE (new) == ADDR_EXPR) |
605 | *tp = TREE_OPERAND (new, 0); | |
095ecc24 | 606 | else |
5e13fdf7 | 607 | *tp = build1 (INDIRECT_REF, type, new); |
095ecc24 | 608 | } |
81cfbbc2 JH |
609 | *walk_subtrees = 0; |
610 | return NULL; | |
68594ce7 JM |
611 | } |
612 | } | |
613 | ||
e21aff8a SB |
614 | /* Here is the "usual case". Copy this tree node, and then |
615 | tweak some special cases. */ | |
1b369fae | 616 | copy_tree_r (tp, walk_subtrees, NULL); |
19734dd8 | 617 | |
acb8f212 JH |
618 | /* If EXPR has block defined, map it to newly constructed block. |
619 | When inlining we want EXPRs without block appear in the block | |
620 | of function call. */ | |
621 | if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (*tp)))) | |
622 | { | |
623 | new_block = id->block; | |
624 | if (TREE_BLOCK (*tp)) | |
625 | { | |
626 | splay_tree_node n; | |
627 | n = splay_tree_lookup (id->decl_map, | |
628 | (splay_tree_key) TREE_BLOCK (*tp)); | |
629 | gcc_assert (n); | |
630 | new_block = (tree) n->value; | |
631 | } | |
632 | TREE_BLOCK (*tp) = new_block; | |
633 | } | |
68594ce7 | 634 | |
e0704a46 | 635 | if (TREE_CODE (*tp) == RESX_EXPR && id->eh_region_offset) |
e21aff8a SB |
636 | TREE_OPERAND (*tp, 0) = |
637 | build_int_cst | |
638 | (NULL_TREE, | |
639 | id->eh_region_offset + TREE_INT_CST_LOW (TREE_OPERAND (*tp, 0))); | |
18c6ada9 | 640 | |
3c2a7a6a RH |
641 | TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id); |
642 | ||
68594ce7 JM |
643 | /* The copied TARGET_EXPR has never been expanded, even if the |
644 | original node was expanded already. */ | |
645 | if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3)) | |
646 | { | |
647 | TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3); | |
648 | TREE_OPERAND (*tp, 3) = NULL_TREE; | |
649 | } | |
84cce55d RH |
650 | |
651 | /* Variable substitution need not be simple. In particular, the | |
652 | INDIRECT_REF substitution above. Make sure that TREE_CONSTANT | |
653 | and friends are up-to-date. */ | |
654 | else if (TREE_CODE (*tp) == ADDR_EXPR) | |
655 | { | |
656 | walk_tree (&TREE_OPERAND (*tp, 0), copy_body_r, id, NULL); | |
127203ac | 657 | recompute_tree_invariant_for_addr_expr (*tp); |
84cce55d RH |
658 | *walk_subtrees = 0; |
659 | } | |
d4e4baa9 AO |
660 | } |
661 | ||
662 | /* Keep iterating. */ | |
663 | return NULL_TREE; | |
664 | } | |
665 | ||
e21aff8a SB |
666 | /* Copy basic block, scale profile accordingly. Edges will be taken care of |
667 | later */ | |
668 | ||
669 | static basic_block | |
1b369fae | 670 | copy_bb (copy_body_data *id, basic_block bb, int frequency_scale, int count_scale) |
e21aff8a SB |
671 | { |
672 | block_stmt_iterator bsi, copy_bsi; | |
673 | basic_block copy_basic_block; | |
674 | ||
675 | /* create_basic_block() will append every new block to | |
676 | basic_block_info automatically. */ | |
cceb1885 GDR |
677 | copy_basic_block = create_basic_block (NULL, (void *) 0, |
678 | (basic_block) bb->prev_bb->aux); | |
e21aff8a SB |
679 | copy_basic_block->count = bb->count * count_scale / REG_BR_PROB_BASE; |
680 | copy_basic_block->frequency = (bb->frequency | |
681 | * frequency_scale / REG_BR_PROB_BASE); | |
682 | copy_bsi = bsi_start (copy_basic_block); | |
683 | ||
684 | for (bsi = bsi_start (bb); | |
685 | !bsi_end_p (bsi); bsi_next (&bsi)) | |
686 | { | |
687 | tree stmt = bsi_stmt (bsi); | |
688 | tree orig_stmt = stmt; | |
689 | ||
690 | walk_tree (&stmt, copy_body_r, id, NULL); | |
691 | ||
692 | /* RETURN_EXPR might be removed, | |
693 | this is signalled by making stmt pointer NULL. */ | |
694 | if (stmt) | |
695 | { | |
e0704a46 | 696 | tree call, decl; |
e21aff8a | 697 | bsi_insert_after (©_bsi, stmt, BSI_NEW_STMT); |
e0704a46 JH |
698 | call = get_call_expr_in (stmt); |
699 | /* We're duplicating a CALL_EXPR. Find any corresponding | |
700 | callgraph edges and update or duplicate them. */ | |
701 | if (call && (decl = get_callee_fndecl (call))) | |
702 | { | |
1b369fae RH |
703 | struct cgraph_node *node; |
704 | struct cgraph_edge *edge; | |
705 | ||
706 | switch (id->transform_call_graph_edges) | |
e0704a46 | 707 | { |
1b369fae RH |
708 | case CB_CGE_DUPLICATE: |
709 | edge = cgraph_edge (id->src_node, orig_stmt); | |
ea99e0be | 710 | if (edge) |
1b369fae | 711 | cgraph_clone_edge (edge, id->dst_node, stmt, |
ea99e0be | 712 | REG_BR_PROB_BASE, 1, true); |
1b369fae RH |
713 | break; |
714 | ||
715 | case CB_CGE_MOVE_CLONES: | |
716 | for (node = id->dst_node->next_clone; | |
717 | node; | |
718 | node = node->next_clone) | |
ea99e0be | 719 | { |
1b369fae RH |
720 | edge = cgraph_edge (node, orig_stmt); |
721 | gcc_assert (edge); | |
ea99e0be | 722 | edge->call_stmt = stmt; |
1b369fae RH |
723 | } |
724 | /* FALLTHRU */ | |
725 | ||
726 | case CB_CGE_MOVE: | |
727 | edge = cgraph_edge (id->dst_node, orig_stmt); | |
728 | if (edge) | |
729 | edge->call_stmt = stmt; | |
730 | break; | |
731 | ||
732 | default: | |
733 | gcc_unreachable (); | |
e0704a46 JH |
734 | } |
735 | } | |
e21aff8a SB |
736 | /* If you think we can abort here, you are wrong. |
737 | There is no region 0 in tree land. */ | |
1b369fae | 738 | gcc_assert (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) |
e21aff8a SB |
739 | != 0); |
740 | ||
741 | if (tree_could_throw_p (stmt)) | |
742 | { | |
1b369fae | 743 | int region = lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt); |
e21aff8a | 744 | /* Add an entry for the copied tree in the EH hashtable. |
1b369fae | 745 | When cloning or versioning, use the hashtable in |
e21aff8a SB |
746 | cfun, and just copy the EH number. When inlining, use the |
747 | hashtable in the caller, and adjust the region number. */ | |
748 | if (region > 0) | |
749 | add_stmt_to_eh_region (stmt, region + id->eh_region_offset); | |
750 | ||
751 | /* If this tree doesn't have a region associated with it, | |
752 | and there is a "current region," | |
753 | then associate this tree with the current region | |
754 | and add edges associated with this region. */ | |
1b369fae | 755 | if ((lookup_stmt_eh_region_fn (id->src_cfun, |
e21aff8a SB |
756 | orig_stmt) <= 0 |
757 | && id->eh_region > 0) | |
758 | && tree_could_throw_p (stmt)) | |
759 | add_stmt_to_eh_region (stmt, id->eh_region); | |
760 | } | |
761 | } | |
762 | } | |
763 | return copy_basic_block; | |
764 | } | |
765 | ||
128a79fb KH |
766 | /* Copy edges from BB into its copy constructed earlier, scale profile |
767 | accordingly. Edges will be taken care of later. Assume aux | |
768 | pointers to point to the copies of each BB. */ | |
e21aff8a SB |
769 | static void |
770 | copy_edges_for_bb (basic_block bb, int count_scale) | |
771 | { | |
cceb1885 | 772 | basic_block new_bb = (basic_block) bb->aux; |
e21aff8a SB |
773 | edge_iterator ei; |
774 | edge old_edge; | |
775 | block_stmt_iterator bsi; | |
776 | int flags; | |
777 | ||
778 | /* Use the indices from the original blocks to create edges for the | |
779 | new ones. */ | |
780 | FOR_EACH_EDGE (old_edge, ei, bb->succs) | |
e0704a46 JH |
781 | if (!(old_edge->flags & EDGE_EH)) |
782 | { | |
783 | edge new; | |
e21aff8a | 784 | |
e0704a46 | 785 | flags = old_edge->flags; |
e21aff8a | 786 | |
e0704a46 JH |
787 | /* Return edges do get a FALLTHRU flag when the get inlined. */ |
788 | if (old_edge->dest->index == EXIT_BLOCK && !old_edge->flags | |
789 | && old_edge->dest->aux != EXIT_BLOCK_PTR) | |
790 | flags |= EDGE_FALLTHRU; | |
cceb1885 | 791 | new = make_edge (new_bb, (basic_block) old_edge->dest->aux, flags); |
e0704a46 JH |
792 | new->count = old_edge->count * count_scale / REG_BR_PROB_BASE; |
793 | new->probability = old_edge->probability; | |
794 | } | |
e21aff8a SB |
795 | |
796 | if (bb->index == ENTRY_BLOCK || bb->index == EXIT_BLOCK) | |
797 | return; | |
798 | ||
e21aff8a SB |
799 | for (bsi = bsi_start (new_bb); !bsi_end_p (bsi);) |
800 | { | |
801 | tree copy_stmt; | |
802 | ||
803 | copy_stmt = bsi_stmt (bsi); | |
804 | update_stmt (copy_stmt); | |
805 | /* Do this before the possible split_block. */ | |
806 | bsi_next (&bsi); | |
807 | ||
808 | /* If this tree could throw an exception, there are two | |
809 | cases where we need to add abnormal edge(s): the | |
810 | tree wasn't in a region and there is a "current | |
811 | region" in the caller; or the original tree had | |
812 | EH edges. In both cases split the block after the tree, | |
813 | and add abnormal edge(s) as needed; we need both | |
814 | those from the callee and the caller. | |
815 | We check whether the copy can throw, because the const | |
816 | propagation can change an INDIRECT_REF which throws | |
817 | into a COMPONENT_REF which doesn't. If the copy | |
818 | can throw, the original could also throw. */ | |
819 | ||
e0704a46 | 820 | if (tree_can_throw_internal (copy_stmt)) |
e21aff8a SB |
821 | { |
822 | if (!bsi_end_p (bsi)) | |
823 | /* Note that bb's predecessor edges aren't necessarily | |
824 | right at this point; split_block doesn't care. */ | |
825 | { | |
826 | edge e = split_block (new_bb, copy_stmt); | |
827 | new_bb = e->dest; | |
828 | bsi = bsi_start (new_bb); | |
829 | } | |
830 | ||
831 | make_eh_edges (copy_stmt); | |
832 | } | |
833 | } | |
834 | } | |
835 | ||
836 | /* Wrapper for remap_decl so it can be used as a callback. */ | |
837 | static tree | |
838 | remap_decl_1 (tree decl, void *data) | |
839 | { | |
1b369fae | 840 | return remap_decl (decl, (copy_body_data *) data); |
e21aff8a SB |
841 | } |
842 | ||
843 | /* Make a copy of the body of FN so that it can be inserted inline in | |
844 | another function. Walks FN via CFG, returns new fndecl. */ | |
845 | ||
846 | static tree | |
1b369fae | 847 | copy_cfg_body (copy_body_data * id, gcov_type count, int frequency, |
e21aff8a SB |
848 | basic_block entry_block_map, basic_block exit_block_map) |
849 | { | |
1b369fae | 850 | tree callee_fndecl = id->src_fn; |
e21aff8a | 851 | /* Original cfun for the callee, doesn't change. */ |
1b369fae | 852 | struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl); |
e21aff8a SB |
853 | /* Copy, built by this function. */ |
854 | struct function *new_cfun; | |
855 | /* Place to copy from; when a copy of the function was saved off earlier, | |
856 | use that instead of the main copy. */ | |
857 | struct function *cfun_to_copy = | |
858 | (struct function *) ggc_alloc_cleared (sizeof (struct function)); | |
859 | basic_block bb; | |
860 | tree new_fndecl = NULL; | |
e21aff8a SB |
861 | int count_scale, frequency_scale; |
862 | ||
1b369fae | 863 | if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count) |
e21aff8a | 864 | count_scale = (REG_BR_PROB_BASE * count |
1b369fae | 865 | / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count); |
e21aff8a SB |
866 | else |
867 | count_scale = 1; | |
868 | ||
1b369fae | 869 | if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency) |
e21aff8a SB |
870 | frequency_scale = (REG_BR_PROB_BASE * frequency |
871 | / | |
1b369fae | 872 | ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency); |
e21aff8a SB |
873 | else |
874 | frequency_scale = count_scale; | |
875 | ||
876 | /* Register specific tree functions. */ | |
877 | tree_register_cfg_hooks (); | |
878 | ||
879 | /* Must have a CFG here at this point. */ | |
880 | gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION | |
881 | (DECL_STRUCT_FUNCTION (callee_fndecl))); | |
882 | ||
883 | *cfun_to_copy = *DECL_STRUCT_FUNCTION (callee_fndecl); | |
884 | ||
1b369fae | 885 | id->src_cfun = cfun_to_copy; |
e21aff8a | 886 | |
1b369fae RH |
887 | /* If requested, create new basic_block_info and label_to_block_maps. |
888 | Otherwise, insert our new blocks and labels into the existing cfg. */ | |
889 | if (id->transform_new_cfg) | |
e21aff8a SB |
890 | { |
891 | new_cfun = | |
892 | (struct function *) ggc_alloc_cleared (sizeof (struct function)); | |
893 | *new_cfun = *DECL_STRUCT_FUNCTION (callee_fndecl); | |
894 | new_cfun->cfg = NULL; | |
895 | new_cfun->decl = new_fndecl = copy_node (callee_fndecl); | |
896 | new_cfun->ib_boundaries_block = (varray_type) 0; | |
897 | DECL_STRUCT_FUNCTION (new_fndecl) = new_cfun; | |
898 | push_cfun (new_cfun); | |
899 | init_empty_tree_cfg (); | |
900 | ||
901 | ENTRY_BLOCK_PTR->count = | |
1b369fae | 902 | (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale / |
e21aff8a SB |
903 | REG_BR_PROB_BASE); |
904 | ENTRY_BLOCK_PTR->frequency = | |
1b369fae | 905 | (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency * |
e21aff8a SB |
906 | frequency_scale / REG_BR_PROB_BASE); |
907 | EXIT_BLOCK_PTR->count = | |
1b369fae | 908 | (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale / |
e21aff8a SB |
909 | REG_BR_PROB_BASE); |
910 | EXIT_BLOCK_PTR->frequency = | |
1b369fae | 911 | (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency * |
e21aff8a SB |
912 | frequency_scale / REG_BR_PROB_BASE); |
913 | ||
914 | entry_block_map = ENTRY_BLOCK_PTR; | |
915 | exit_block_map = EXIT_BLOCK_PTR; | |
916 | } | |
917 | ||
918 | ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = entry_block_map; | |
919 | EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = exit_block_map; | |
920 | ||
e21aff8a SB |
921 | /* Duplicate any exception-handling regions. */ |
922 | if (cfun->eh) | |
923 | { | |
1b369fae | 924 | if (id->transform_new_cfg) |
e21aff8a | 925 | init_eh_for_function (); |
1b369fae | 926 | id->eh_region_offset |
fad41cd7 RH |
927 | = duplicate_eh_regions (cfun_to_copy, remap_decl_1, id, |
928 | 0, id->eh_region); | |
e21aff8a SB |
929 | } |
930 | /* Use aux pointers to map the original blocks to copy. */ | |
931 | FOR_EACH_BB_FN (bb, cfun_to_copy) | |
932 | bb->aux = copy_bb (id, bb, frequency_scale, count_scale); | |
933 | /* Now that we've duplicated the blocks, duplicate their edges. */ | |
934 | FOR_ALL_BB_FN (bb, cfun_to_copy) | |
935 | copy_edges_for_bb (bb, count_scale); | |
936 | FOR_ALL_BB_FN (bb, cfun_to_copy) | |
937 | bb->aux = NULL; | |
938 | ||
1b369fae | 939 | if (id->transform_new_cfg) |
e21aff8a SB |
940 | pop_cfun (); |
941 | ||
942 | return new_fndecl; | |
943 | } | |
944 | ||
d4e4baa9 AO |
945 | /* Make a copy of the body of FN so that it can be inserted inline in |
946 | another function. */ | |
947 | ||
948 | static tree | |
1b369fae | 949 | copy_generic_body (copy_body_data *id) |
d4e4baa9 AO |
950 | { |
951 | tree body; | |
1b369fae | 952 | tree fndecl = id->src_fn; |
d4e4baa9 | 953 | |
e21aff8a | 954 | body = DECL_SAVED_TREE (fndecl); |
d4e4baa9 AO |
955 | walk_tree (&body, copy_body_r, id, NULL); |
956 | ||
957 | return body; | |
958 | } | |
959 | ||
e21aff8a | 960 | static tree |
1b369fae | 961 | copy_body (copy_body_data *id, gcov_type count, int frequency, |
e21aff8a SB |
962 | basic_block entry_block_map, basic_block exit_block_map) |
963 | { | |
1b369fae | 964 | tree fndecl = id->src_fn; |
e21aff8a SB |
965 | tree body; |
966 | ||
967 | /* If this body has a CFG, walk CFG and copy. */ | |
968 | gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION (DECL_STRUCT_FUNCTION (fndecl))); | |
969 | body = copy_cfg_body (id, count, frequency, entry_block_map, exit_block_map); | |
970 | ||
971 | return body; | |
972 | } | |
973 | ||
04482133 AO |
974 | /* Return true if VALUE is an ADDR_EXPR of an automatic variable |
975 | defined in function FN, or of a data member thereof. */ | |
976 | ||
977 | static bool | |
978 | self_inlining_addr_expr (tree value, tree fn) | |
979 | { | |
980 | tree var; | |
981 | ||
982 | if (TREE_CODE (value) != ADDR_EXPR) | |
983 | return false; | |
984 | ||
985 | var = get_base_address (TREE_OPERAND (value, 0)); | |
e21aff8a | 986 | |
04482133 AO |
987 | return var && lang_hooks.tree_inlining.auto_var_in_fn_p (var, fn); |
988 | } | |
989 | ||
6de9cd9a | 990 | static void |
1b369fae | 991 | setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn, |
e21aff8a | 992 | basic_block bb, tree *vars) |
6de9cd9a DN |
993 | { |
994 | tree init_stmt; | |
995 | tree var; | |
e21aff8a | 996 | tree var_sub; |
6de9cd9a DN |
997 | |
998 | /* If the parameter is never assigned to, we may not need to | |
999 | create a new variable here at all. Instead, we may be able | |
1000 | to just use the argument value. */ | |
1001 | if (TREE_READONLY (p) | |
1002 | && !TREE_ADDRESSABLE (p) | |
1003 | && value && !TREE_SIDE_EFFECTS (value)) | |
1004 | { | |
84936f6f RH |
1005 | /* We may produce non-gimple trees by adding NOPs or introduce |
1006 | invalid sharing when operand is not really constant. | |
1007 | It is not big deal to prohibit constant propagation here as | |
1008 | we will constant propagate in DOM1 pass anyway. */ | |
1009 | if (is_gimple_min_invariant (value) | |
04482133 AO |
1010 | && lang_hooks.types_compatible_p (TREE_TYPE (value), TREE_TYPE (p)) |
1011 | /* We have to be very careful about ADDR_EXPR. Make sure | |
1012 | the base variable isn't a local variable of the inlined | |
1013 | function, e.g., when doing recursive inlining, direct or | |
1014 | mutually-recursive or whatever, which is why we don't | |
1015 | just test whether fn == current_function_decl. */ | |
1016 | && ! self_inlining_addr_expr (value, fn)) | |
6de9cd9a | 1017 | { |
6de9cd9a DN |
1018 | insert_decl_map (id, p, value); |
1019 | return; | |
1020 | } | |
1021 | } | |
1022 | ||
5377d5ba RK |
1023 | /* Make an equivalent VAR_DECL. Note that we must NOT remap the type |
1024 | here since the type of this decl must be visible to the calling | |
8c27b7d4 | 1025 | function. */ |
1b369fae | 1026 | var = copy_decl_to_var (p, id); |
e21aff8a SB |
1027 | |
1028 | /* See if the frontend wants to pass this by invisible reference. If | |
1029 | so, our new VAR_DECL will have REFERENCE_TYPE, and we need to | |
1030 | replace uses of the PARM_DECL with dereferences. */ | |
1031 | if (TREE_TYPE (var) != TREE_TYPE (p) | |
1032 | && POINTER_TYPE_P (TREE_TYPE (var)) | |
1033 | && TREE_TYPE (TREE_TYPE (var)) == TREE_TYPE (p)) | |
1034 | { | |
1035 | insert_decl_map (id, var, var); | |
1036 | var_sub = build_fold_indirect_ref (var); | |
1037 | } | |
1038 | else | |
1039 | var_sub = var; | |
6de9cd9a | 1040 | |
6de9cd9a DN |
1041 | /* Register the VAR_DECL as the equivalent for the PARM_DECL; |
1042 | that way, when the PARM_DECL is encountered, it will be | |
1043 | automatically replaced by the VAR_DECL. */ | |
e21aff8a | 1044 | insert_decl_map (id, p, var_sub); |
6de9cd9a DN |
1045 | |
1046 | /* Declare this new variable. */ | |
1047 | TREE_CHAIN (var) = *vars; | |
1048 | *vars = var; | |
1049 | ||
1050 | /* Make gimplifier happy about this variable. */ | |
84936f6f | 1051 | DECL_SEEN_IN_BIND_EXPR_P (var) = 1; |
6de9cd9a DN |
1052 | |
1053 | /* Even if P was TREE_READONLY, the new VAR should not be. | |
1054 | In the original code, we would have constructed a | |
1055 | temporary, and then the function body would have never | |
1056 | changed the value of P. However, now, we will be | |
1057 | constructing VAR directly. The constructor body may | |
1058 | change its value multiple times as it is being | |
1059 | constructed. Therefore, it must not be TREE_READONLY; | |
1060 | the back-end assumes that TREE_READONLY variable is | |
1061 | assigned to only once. */ | |
1062 | if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p))) | |
1063 | TREE_READONLY (var) = 0; | |
1064 | ||
1065 | /* Initialize this VAR_DECL from the equivalent argument. Convert | |
1066 | the argument to the proper type in case it was promoted. */ | |
1067 | if (value) | |
1068 | { | |
e072ae27 | 1069 | tree rhs = fold_convert (TREE_TYPE (var), value); |
e21aff8a | 1070 | block_stmt_iterator bsi = bsi_last (bb); |
6de9cd9a DN |
1071 | |
1072 | if (rhs == error_mark_node) | |
1073 | return; | |
1074 | ||
1075 | /* We want to use MODIFY_EXPR, not INIT_EXPR here so that we | |
1076 | keep our trees in gimple form. */ | |
b4257cfc | 1077 | init_stmt = build2 (MODIFY_EXPR, TREE_TYPE (var), var, rhs); |
6de9cd9a DN |
1078 | |
1079 | /* If we did not create a gimple value and we did not create a gimple | |
1080 | cast of a gimple value, then we will need to gimplify INIT_STMTS | |
1081 | at the end. Note that is_gimple_cast only checks the outer | |
128a79fb | 1082 | tree code, not its operand. Thus the explicit check that its |
6de9cd9a DN |
1083 | operand is a gimple value. */ |
1084 | if (!is_gimple_val (rhs) | |
1085 | && (!is_gimple_cast (rhs) | |
1086 | || !is_gimple_val (TREE_OPERAND (rhs, 0)))) | |
e21aff8a | 1087 | gimplify_stmt (&init_stmt); |
52f66176 RK |
1088 | |
1089 | /* If VAR represents a zero-sized variable, it's possible that the | |
1090 | assignment statment may result in no gimple statements. */ | |
047f4b2c AP |
1091 | if (init_stmt) |
1092 | bsi_insert_after (&bsi, init_stmt, BSI_NEW_STMT); | |
6de9cd9a DN |
1093 | } |
1094 | } | |
1095 | ||
d4e4baa9 AO |
1096 | /* Generate code to initialize the parameters of the function at the |
1097 | top of the stack in ID from the ARGS (presented as a TREE_LIST). */ | |
1098 | ||
e21aff8a | 1099 | static void |
1b369fae | 1100 | initialize_inlined_parameters (copy_body_data *id, tree args, tree static_chain, |
e21aff8a | 1101 | tree fn, basic_block bb) |
d4e4baa9 | 1102 | { |
d4e4baa9 AO |
1103 | tree parms; |
1104 | tree a; | |
1105 | tree p; | |
d436bff8 | 1106 | tree vars = NULL_TREE; |
d5123bae | 1107 | int argnum = 0; |
d4e4baa9 AO |
1108 | |
1109 | /* Figure out what the parameters are. */ | |
18c6ada9 | 1110 | parms = DECL_ARGUMENTS (fn); |
d4e4baa9 | 1111 | |
d4e4baa9 AO |
1112 | /* Loop through the parameter declarations, replacing each with an |
1113 | equivalent VAR_DECL, appropriately initialized. */ | |
4838c5ee AO |
1114 | for (p = parms, a = args; p; |
1115 | a = a ? TREE_CHAIN (a) : a, p = TREE_CHAIN (p)) | |
d4e4baa9 | 1116 | { |
d4e4baa9 AO |
1117 | tree value; |
1118 | ||
d5123bae MS |
1119 | ++argnum; |
1120 | ||
d4e4baa9 | 1121 | /* Find the initializer. */ |
ae2bcd98 | 1122 | value = lang_hooks.tree_inlining.convert_parm_for_inlining |
d5123bae | 1123 | (p, a ? TREE_VALUE (a) : NULL_TREE, fn, argnum); |
4838c5ee | 1124 | |
e21aff8a | 1125 | setup_one_parameter (id, p, value, fn, bb, &vars); |
6de9cd9a | 1126 | } |
4838c5ee | 1127 | |
6de9cd9a DN |
1128 | /* Initialize the static chain. */ |
1129 | p = DECL_STRUCT_FUNCTION (fn)->static_chain_decl; | |
ea99e0be | 1130 | gcc_assert (fn != current_function_decl); |
6de9cd9a DN |
1131 | if (p) |
1132 | { | |
1133 | /* No static chain? Seems like a bug in tree-nested.c. */ | |
1e128c5f | 1134 | gcc_assert (static_chain); |
4838c5ee | 1135 | |
e21aff8a | 1136 | setup_one_parameter (id, p, static_chain, fn, bb, &vars); |
4838c5ee AO |
1137 | } |
1138 | ||
e21aff8a | 1139 | declare_inline_vars (id->block, vars); |
d4e4baa9 AO |
1140 | } |
1141 | ||
e21aff8a SB |
1142 | /* Declare a return variable to replace the RESULT_DECL for the |
1143 | function we are calling. An appropriate DECL_STMT is returned. | |
1144 | The USE_STMT is filled to contain a use of the declaration to | |
1145 | indicate the return value of the function. | |
1146 | ||
1147 | RETURN_SLOT_ADDR, if non-null, was a fake parameter that | |
7740f00d RH |
1148 | took the address of the result. MODIFY_DEST, if non-null, was the LHS of |
1149 | the MODIFY_EXPR to which this call is the RHS. | |
1150 | ||
1151 | The return value is a (possibly null) value that is the result of the | |
1152 | function as seen by the callee. *USE_P is a (possibly null) value that | |
1153 | holds the result as seen by the caller. */ | |
d4e4baa9 | 1154 | |
d436bff8 | 1155 | static tree |
1b369fae | 1156 | declare_return_variable (copy_body_data *id, tree return_slot_addr, |
7740f00d | 1157 | tree modify_dest, tree *use_p) |
d4e4baa9 | 1158 | { |
1b369fae RH |
1159 | tree callee = id->src_fn; |
1160 | tree caller = id->dst_fn; | |
7740f00d RH |
1161 | tree result = DECL_RESULT (callee); |
1162 | tree callee_type = TREE_TYPE (result); | |
1163 | tree caller_type = TREE_TYPE (TREE_TYPE (callee)); | |
1164 | tree var, use; | |
d4e4baa9 AO |
1165 | |
1166 | /* We don't need to do anything for functions that don't return | |
1167 | anything. */ | |
7740f00d | 1168 | if (!result || VOID_TYPE_P (callee_type)) |
d4e4baa9 | 1169 | { |
6de9cd9a | 1170 | *use_p = NULL_TREE; |
d4e4baa9 AO |
1171 | return NULL_TREE; |
1172 | } | |
1173 | ||
cc77ae10 | 1174 | /* If there was a return slot, then the return value is the |
7740f00d RH |
1175 | dereferenced address of that object. */ |
1176 | if (return_slot_addr) | |
1177 | { | |
1178 | /* The front end shouldn't have used both return_slot_addr and | |
1179 | a modify expression. */ | |
1e128c5f | 1180 | gcc_assert (!modify_dest); |
cc77ae10 JM |
1181 | if (DECL_BY_REFERENCE (result)) |
1182 | var = return_slot_addr; | |
1183 | else | |
1184 | var = build_fold_indirect_ref (return_slot_addr); | |
22918034 AP |
1185 | if (TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE |
1186 | && !DECL_COMPLEX_GIMPLE_REG_P (result) | |
1187 | && DECL_P (var)) | |
1188 | DECL_COMPLEX_GIMPLE_REG_P (var) = 0; | |
7740f00d RH |
1189 | use = NULL; |
1190 | goto done; | |
1191 | } | |
1192 | ||
1193 | /* All types requiring non-trivial constructors should have been handled. */ | |
1e128c5f | 1194 | gcc_assert (!TREE_ADDRESSABLE (callee_type)); |
7740f00d RH |
1195 | |
1196 | /* Attempt to avoid creating a new temporary variable. */ | |
1197 | if (modify_dest) | |
1198 | { | |
1199 | bool use_it = false; | |
1200 | ||
1201 | /* We can't use MODIFY_DEST if there's type promotion involved. */ | |
1202 | if (!lang_hooks.types_compatible_p (caller_type, callee_type)) | |
1203 | use_it = false; | |
1204 | ||
1205 | /* ??? If we're assigning to a variable sized type, then we must | |
1206 | reuse the destination variable, because we've no good way to | |
1207 | create variable sized temporaries at this point. */ | |
1208 | else if (TREE_CODE (TYPE_SIZE_UNIT (caller_type)) != INTEGER_CST) | |
1209 | use_it = true; | |
1210 | ||
1211 | /* If the callee cannot possibly modify MODIFY_DEST, then we can | |
1212 | reuse it as the result of the call directly. Don't do this if | |
1213 | it would promote MODIFY_DEST to addressable. */ | |
e2f9fe42 RH |
1214 | else if (TREE_ADDRESSABLE (result)) |
1215 | use_it = false; | |
1216 | else | |
1217 | { | |
1218 | tree base_m = get_base_address (modify_dest); | |
1219 | ||
1220 | /* If the base isn't a decl, then it's a pointer, and we don't | |
1221 | know where that's going to go. */ | |
1222 | if (!DECL_P (base_m)) | |
1223 | use_it = false; | |
1224 | else if (is_global_var (base_m)) | |
1225 | use_it = false; | |
1d327c16 JM |
1226 | else if (TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE |
1227 | && !DECL_COMPLEX_GIMPLE_REG_P (result) | |
1228 | && DECL_COMPLEX_GIMPLE_REG_P (base_m)) | |
1229 | use_it = false; | |
e2f9fe42 RH |
1230 | else if (!TREE_ADDRESSABLE (base_m)) |
1231 | use_it = true; | |
1232 | } | |
7740f00d RH |
1233 | |
1234 | if (use_it) | |
1235 | { | |
1236 | var = modify_dest; | |
1237 | use = NULL; | |
1238 | goto done; | |
1239 | } | |
1240 | } | |
1241 | ||
1e128c5f | 1242 | gcc_assert (TREE_CODE (TYPE_SIZE_UNIT (callee_type)) == INTEGER_CST); |
7740f00d | 1243 | |
1b369fae | 1244 | var = copy_decl_to_var (result, id); |
e21aff8a | 1245 | |
7740f00d RH |
1246 | DECL_SEEN_IN_BIND_EXPR_P (var) = 1; |
1247 | DECL_STRUCT_FUNCTION (caller)->unexpanded_var_list | |
1248 | = tree_cons (NULL_TREE, var, | |
1249 | DECL_STRUCT_FUNCTION (caller)->unexpanded_var_list); | |
1250 | ||
6de9cd9a | 1251 | /* Do not have the rest of GCC warn about this variable as it should |
471854f8 | 1252 | not be visible to the user. */ |
6de9cd9a | 1253 | TREE_NO_WARNING (var) = 1; |
d4e4baa9 | 1254 | |
7740f00d RH |
1255 | /* Build the use expr. If the return type of the function was |
1256 | promoted, convert it back to the expected type. */ | |
1257 | use = var; | |
1258 | if (!lang_hooks.types_compatible_p (TREE_TYPE (var), caller_type)) | |
1259 | use = fold_convert (caller_type, var); | |
1260 | ||
1261 | done: | |
d4e4baa9 AO |
1262 | /* Register the VAR_DECL as the equivalent for the RESULT_DECL; that |
1263 | way, when the RESULT_DECL is encountered, it will be | |
1264 | automatically replaced by the VAR_DECL. */ | |
5e20bdd7 | 1265 | insert_decl_map (id, result, var); |
d4e4baa9 | 1266 | |
6de9cd9a DN |
1267 | /* Remember this so we can ignore it in remap_decls. */ |
1268 | id->retvar = var; | |
1269 | ||
7740f00d RH |
1270 | *use_p = use; |
1271 | return var; | |
d4e4baa9 AO |
1272 | } |
1273 | ||
0e9e1e0a | 1274 | /* Returns nonzero if a function can be inlined as a tree. */ |
4838c5ee | 1275 | |
b3c3af2f SB |
1276 | bool |
1277 | tree_inlinable_function_p (tree fn) | |
4838c5ee | 1278 | { |
b3c3af2f | 1279 | return inlinable_function_p (fn); |
4838c5ee AO |
1280 | } |
1281 | ||
f08545a8 | 1282 | static const char *inline_forbidden_reason; |
c986baf6 | 1283 | |
c986baf6 | 1284 | static tree |
f08545a8 | 1285 | inline_forbidden_p_1 (tree *nodep, int *walk_subtrees ATTRIBUTE_UNUSED, |
edeb3871 | 1286 | void *fnp) |
c986baf6 | 1287 | { |
f08545a8 | 1288 | tree node = *nodep; |
edeb3871 | 1289 | tree fn = (tree) fnp; |
f08545a8 | 1290 | tree t; |
c986baf6 | 1291 | |
f08545a8 JH |
1292 | switch (TREE_CODE (node)) |
1293 | { | |
1294 | case CALL_EXPR: | |
3197c4fd AS |
1295 | /* Refuse to inline alloca call unless user explicitly forced so as |
1296 | this may change program's memory overhead drastically when the | |
1297 | function using alloca is called in loop. In GCC present in | |
1298 | SPEC2000 inlining into schedule_block cause it to require 2GB of | |
1299 | RAM instead of 256MB. */ | |
f08545a8 JH |
1300 | if (alloca_call_p (node) |
1301 | && !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))) | |
1302 | { | |
ddd2d57e | 1303 | inline_forbidden_reason |
dee15844 | 1304 | = G_("function %q+F can never be inlined because it uses " |
ddd2d57e | 1305 | "alloca (override using the always_inline attribute)"); |
f08545a8 JH |
1306 | return node; |
1307 | } | |
1308 | t = get_callee_fndecl (node); | |
1309 | if (! t) | |
1310 | break; | |
84f5e1b1 | 1311 | |
f08545a8 JH |
1312 | /* We cannot inline functions that call setjmp. */ |
1313 | if (setjmp_call_p (t)) | |
1314 | { | |
ddd2d57e | 1315 | inline_forbidden_reason |
dee15844 | 1316 | = G_("function %q+F can never be inlined because it uses setjmp"); |
f08545a8 JH |
1317 | return node; |
1318 | } | |
1319 | ||
6de9cd9a | 1320 | if (DECL_BUILT_IN_CLASS (t) == BUILT_IN_NORMAL) |
3197c4fd | 1321 | switch (DECL_FUNCTION_CODE (t)) |
f08545a8 | 1322 | { |
3197c4fd AS |
1323 | /* We cannot inline functions that take a variable number of |
1324 | arguments. */ | |
1325 | case BUILT_IN_VA_START: | |
1326 | case BUILT_IN_STDARG_START: | |
1327 | case BUILT_IN_NEXT_ARG: | |
1328 | case BUILT_IN_VA_END: | |
6de9cd9a | 1329 | inline_forbidden_reason |
dee15844 | 1330 | = G_("function %q+F can never be inlined because it " |
6de9cd9a DN |
1331 | "uses variable argument lists"); |
1332 | return node; | |
1333 | ||
3197c4fd | 1334 | case BUILT_IN_LONGJMP: |
6de9cd9a DN |
1335 | /* We can't inline functions that call __builtin_longjmp at |
1336 | all. The non-local goto machinery really requires the | |
1337 | destination be in a different function. If we allow the | |
1338 | function calling __builtin_longjmp to be inlined into the | |
1339 | function calling __builtin_setjmp, Things will Go Awry. */ | |
1340 | inline_forbidden_reason | |
dee15844 | 1341 | = G_("function %q+F can never be inlined because " |
6de9cd9a DN |
1342 | "it uses setjmp-longjmp exception handling"); |
1343 | return node; | |
1344 | ||
1345 | case BUILT_IN_NONLOCAL_GOTO: | |
1346 | /* Similarly. */ | |
1347 | inline_forbidden_reason | |
dee15844 | 1348 | = G_("function %q+F can never be inlined because " |
6de9cd9a DN |
1349 | "it uses non-local goto"); |
1350 | return node; | |
f08545a8 | 1351 | |
4b284111 JJ |
1352 | case BUILT_IN_RETURN: |
1353 | case BUILT_IN_APPLY_ARGS: | |
1354 | /* If a __builtin_apply_args caller would be inlined, | |
1355 | it would be saving arguments of the function it has | |
1356 | been inlined into. Similarly __builtin_return would | |
1357 | return from the function the inline has been inlined into. */ | |
1358 | inline_forbidden_reason | |
dee15844 | 1359 | = G_("function %q+F can never be inlined because " |
4b284111 JJ |
1360 | "it uses __builtin_return or __builtin_apply_args"); |
1361 | return node; | |
1362 | ||
3197c4fd AS |
1363 | default: |
1364 | break; | |
1365 | } | |
f08545a8 JH |
1366 | break; |
1367 | ||
f08545a8 JH |
1368 | case GOTO_EXPR: |
1369 | t = TREE_OPERAND (node, 0); | |
1370 | ||
1371 | /* We will not inline a function which uses computed goto. The | |
1372 | addresses of its local labels, which may be tucked into | |
1373 | global storage, are of course not constant across | |
1374 | instantiations, which causes unexpected behavior. */ | |
1375 | if (TREE_CODE (t) != LABEL_DECL) | |
1376 | { | |
ddd2d57e | 1377 | inline_forbidden_reason |
dee15844 | 1378 | = G_("function %q+F can never be inlined " |
ddd2d57e | 1379 | "because it contains a computed goto"); |
f08545a8 JH |
1380 | return node; |
1381 | } | |
6de9cd9a | 1382 | break; |
f08545a8 | 1383 | |
6de9cd9a DN |
1384 | case LABEL_EXPR: |
1385 | t = TREE_OPERAND (node, 0); | |
1386 | if (DECL_NONLOCAL (t)) | |
f08545a8 | 1387 | { |
6de9cd9a DN |
1388 | /* We cannot inline a function that receives a non-local goto |
1389 | because we cannot remap the destination label used in the | |
1390 | function that is performing the non-local goto. */ | |
ddd2d57e | 1391 | inline_forbidden_reason |
dee15844 | 1392 | = G_("function %q+F can never be inlined " |
6de9cd9a | 1393 | "because it receives a non-local goto"); |
ed397c43 | 1394 | return node; |
f08545a8 | 1395 | } |
f08545a8 JH |
1396 | break; |
1397 | ||
1398 | case RECORD_TYPE: | |
1399 | case UNION_TYPE: | |
1400 | /* We cannot inline a function of the form | |
1401 | ||
1402 | void F (int i) { struct S { int ar[i]; } s; } | |
1403 | ||
1404 | Attempting to do so produces a catch-22. | |
1405 | If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/ | |
1406 | UNION_TYPE nodes, then it goes into infinite recursion on a | |
1407 | structure containing a pointer to its own type. If it doesn't, | |
1408 | then the type node for S doesn't get adjusted properly when | |
0e61db61 | 1409 | F is inlined. |
27b892b4 RK |
1410 | |
1411 | ??? This is likely no longer true, but it's too late in the 4.0 | |
1412 | cycle to try to find out. This should be checked for 4.1. */ | |
f08545a8 | 1413 | for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t)) |
5377d5ba | 1414 | if (variably_modified_type_p (TREE_TYPE (t), NULL)) |
f08545a8 | 1415 | { |
ddd2d57e | 1416 | inline_forbidden_reason |
dee15844 | 1417 | = G_("function %q+F can never be inlined " |
ddd2d57e | 1418 | "because it uses variable sized variables"); |
f08545a8 JH |
1419 | return node; |
1420 | } | |
6de9cd9a | 1421 | |
f08545a8 JH |
1422 | default: |
1423 | break; | |
1424 | } | |
1425 | ||
1426 | return NULL_TREE; | |
84f5e1b1 RH |
1427 | } |
1428 | ||
f08545a8 | 1429 | /* Return subexpression representing possible alloca call, if any. */ |
84f5e1b1 | 1430 | static tree |
f08545a8 | 1431 | inline_forbidden_p (tree fndecl) |
84f5e1b1 | 1432 | { |
070588f0 | 1433 | location_t saved_loc = input_location; |
e21aff8a SB |
1434 | block_stmt_iterator bsi; |
1435 | basic_block bb; | |
1436 | tree ret = NULL_TREE; | |
1437 | ||
1438 | FOR_EACH_BB_FN (bb, DECL_STRUCT_FUNCTION (fndecl)) | |
1439 | for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi)) | |
1440 | { | |
1441 | ret = walk_tree_without_duplicates (bsi_stmt_ptr (bsi), | |
1442 | inline_forbidden_p_1, fndecl); | |
1443 | if (ret) | |
1444 | goto egress; | |
1445 | } | |
ed397c43 | 1446 | |
e21aff8a | 1447 | egress: |
070588f0 | 1448 | input_location = saved_loc; |
d1a74aa7 | 1449 | return ret; |
84f5e1b1 RH |
1450 | } |
1451 | ||
b3c3af2f SB |
1452 | /* Returns nonzero if FN is a function that does not have any |
1453 | fundamental inline blocking properties. */ | |
d4e4baa9 | 1454 | |
b3c3af2f SB |
1455 | static bool |
1456 | inlinable_function_p (tree fn) | |
d4e4baa9 | 1457 | { |
b3c3af2f | 1458 | bool inlinable = true; |
d4e4baa9 AO |
1459 | |
1460 | /* If we've already decided this function shouldn't be inlined, | |
1461 | there's no need to check again. */ | |
1462 | if (DECL_UNINLINABLE (fn)) | |
b3c3af2f | 1463 | return false; |
d4e4baa9 | 1464 | |
d58b7c2d MM |
1465 | /* See if there is any language-specific reason it cannot be |
1466 | inlined. (It is important that this hook be called early because | |
b3c3af2f SB |
1467 | in C++ it may result in template instantiation.) |
1468 | If the function is not inlinable for language-specific reasons, | |
1469 | it is left up to the langhook to explain why. */ | |
ae2bcd98 | 1470 | inlinable = !lang_hooks.tree_inlining.cannot_inline_tree_fn (&fn); |
46c5ad27 | 1471 | |
b3c3af2f SB |
1472 | /* If we don't have the function body available, we can't inline it. |
1473 | However, this should not be recorded since we also get here for | |
1474 | forward declared inline functions. Therefore, return at once. */ | |
1475 | if (!DECL_SAVED_TREE (fn)) | |
1476 | return false; | |
1477 | ||
1478 | /* If we're not inlining at all, then we cannot inline this function. */ | |
1479 | else if (!flag_inline_trees) | |
1480 | inlinable = false; | |
1481 | ||
1482 | /* Only try to inline functions if DECL_INLINE is set. This should be | |
1483 | true for all functions declared `inline', and for all other functions | |
1484 | as well with -finline-functions. | |
1485 | ||
1486 | Don't think of disregarding DECL_INLINE when flag_inline_trees == 2; | |
1487 | it's the front-end that must set DECL_INLINE in this case, because | |
1488 | dwarf2out loses if a function that does not have DECL_INLINE set is | |
1489 | inlined anyway. That is why we have both DECL_INLINE and | |
1490 | DECL_DECLARED_INLINE_P. */ | |
1491 | /* FIXME: When flag_inline_trees dies, the check for flag_unit_at_a_time | |
1492 | here should be redundant. */ | |
1493 | else if (!DECL_INLINE (fn) && !flag_unit_at_a_time) | |
1494 | inlinable = false; | |
a0c8285b | 1495 | |
f08545a8 | 1496 | else if (inline_forbidden_p (fn)) |
b3c3af2f SB |
1497 | { |
1498 | /* See if we should warn about uninlinable functions. Previously, | |
1499 | some of these warnings would be issued while trying to expand | |
1500 | the function inline, but that would cause multiple warnings | |
1501 | about functions that would for example call alloca. But since | |
1502 | this a property of the function, just one warning is enough. | |
1503 | As a bonus we can now give more details about the reason why a | |
1504 | function is not inlinable. | |
1505 | We only warn for functions declared `inline' by the user. */ | |
1506 | bool do_warning = (warn_inline | |
1507 | && DECL_INLINE (fn) | |
1508 | && DECL_DECLARED_INLINE_P (fn) | |
1509 | && !DECL_IN_SYSTEM_HEADER (fn)); | |
1510 | ||
aa4a53af | 1511 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))) |
dee15844 | 1512 | sorry (inline_forbidden_reason, fn); |
2d327012 | 1513 | else if (do_warning) |
d2fcbf6f | 1514 | warning (OPT_Winline, inline_forbidden_reason, fn); |
b3c3af2f SB |
1515 | |
1516 | inlinable = false; | |
1517 | } | |
d4e4baa9 AO |
1518 | |
1519 | /* Squirrel away the result so that we don't have to check again. */ | |
b3c3af2f | 1520 | DECL_UNINLINABLE (fn) = !inlinable; |
d4e4baa9 | 1521 | |
b3c3af2f SB |
1522 | return inlinable; |
1523 | } | |
1524 | ||
e5c4f28a RG |
1525 | /* Estimate the cost of a memory move. Use machine dependent |
1526 | word size and take possible memcpy call into account. */ | |
1527 | ||
1528 | int | |
1529 | estimate_move_cost (tree type) | |
1530 | { | |
1531 | HOST_WIDE_INT size; | |
1532 | ||
1533 | size = int_size_in_bytes (type); | |
1534 | ||
1535 | if (size < 0 || size > MOVE_MAX_PIECES * MOVE_RATIO) | |
1536 | /* Cost of a memcpy call, 3 arguments and the call. */ | |
1537 | return 4; | |
1538 | else | |
1539 | return ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES); | |
1540 | } | |
1541 | ||
6de9cd9a DN |
1542 | /* Used by estimate_num_insns. Estimate number of instructions seen |
1543 | by given statement. */ | |
aa4a53af | 1544 | |
6de9cd9a DN |
1545 | static tree |
1546 | estimate_num_insns_1 (tree *tp, int *walk_subtrees, void *data) | |
1547 | { | |
cceb1885 | 1548 | int *count = (int *) data; |
6de9cd9a DN |
1549 | tree x = *tp; |
1550 | ||
6615c446 | 1551 | if (IS_TYPE_OR_DECL_P (x)) |
6de9cd9a DN |
1552 | { |
1553 | *walk_subtrees = 0; | |
1554 | return NULL; | |
1555 | } | |
1556 | /* Assume that constants and references counts nothing. These should | |
1557 | be majorized by amount of operations among them we count later | |
1558 | and are common target of CSE and similar optimizations. */ | |
6615c446 | 1559 | else if (CONSTANT_CLASS_P (x) || REFERENCE_CLASS_P (x)) |
6de9cd9a | 1560 | return NULL; |
ed397c43 | 1561 | |
6de9cd9a | 1562 | switch (TREE_CODE (x)) |
9f63daea | 1563 | { |
6de9cd9a DN |
1564 | /* Containers have no cost. */ |
1565 | case TREE_LIST: | |
1566 | case TREE_VEC: | |
1567 | case BLOCK: | |
1568 | case COMPONENT_REF: | |
1569 | case BIT_FIELD_REF: | |
1570 | case INDIRECT_REF: | |
16630a2c DN |
1571 | case ALIGN_INDIRECT_REF: |
1572 | case MISALIGNED_INDIRECT_REF: | |
6de9cd9a DN |
1573 | case ARRAY_REF: |
1574 | case ARRAY_RANGE_REF: | |
0f59171d | 1575 | case OBJ_TYPE_REF: |
6de9cd9a DN |
1576 | case EXC_PTR_EXPR: /* ??? */ |
1577 | case FILTER_EXPR: /* ??? */ | |
1578 | case COMPOUND_EXPR: | |
1579 | case BIND_EXPR: | |
6de9cd9a DN |
1580 | case WITH_CLEANUP_EXPR: |
1581 | case NOP_EXPR: | |
1582 | case VIEW_CONVERT_EXPR: | |
1583 | case SAVE_EXPR: | |
6de9cd9a | 1584 | case ADDR_EXPR: |
6de9cd9a | 1585 | case COMPLEX_EXPR: |
61fcaeec | 1586 | case RANGE_EXPR: |
6de9cd9a DN |
1587 | case CASE_LABEL_EXPR: |
1588 | case SSA_NAME: | |
1589 | case CATCH_EXPR: | |
1590 | case EH_FILTER_EXPR: | |
1591 | case STATEMENT_LIST: | |
1592 | case ERROR_MARK: | |
1593 | case NON_LVALUE_EXPR: | |
6de9cd9a DN |
1594 | case FDESC_EXPR: |
1595 | case VA_ARG_EXPR: | |
1596 | case TRY_CATCH_EXPR: | |
1597 | case TRY_FINALLY_EXPR: | |
1598 | case LABEL_EXPR: | |
1599 | case GOTO_EXPR: | |
1600 | case RETURN_EXPR: | |
1601 | case EXIT_EXPR: | |
1602 | case LOOP_EXPR: | |
6de9cd9a | 1603 | case PHI_NODE: |
d25cee4d | 1604 | case WITH_SIZE_EXPR: |
aaf46ef9 | 1605 | case OMP_CLAUSE: |
50674e96 | 1606 | case OMP_RETURN_EXPR: |
6de9cd9a | 1607 | break; |
aa4a53af | 1608 | |
6de9cd9a DN |
1609 | /* We don't account constants for now. Assume that the cost is amortized |
1610 | by operations that do use them. We may re-consider this decision once | |
128a79fb | 1611 | we are able to optimize the tree before estimating its size and break |
6de9cd9a DN |
1612 | out static initializers. */ |
1613 | case IDENTIFIER_NODE: | |
1614 | case INTEGER_CST: | |
1615 | case REAL_CST: | |
1616 | case COMPLEX_CST: | |
1617 | case VECTOR_CST: | |
1618 | case STRING_CST: | |
1619 | *walk_subtrees = 0; | |
1620 | return NULL; | |
3a5b9284 | 1621 | |
e5c4f28a RG |
1622 | /* Try to estimate the cost of assignments. We have three cases to |
1623 | deal with: | |
1624 | 1) Simple assignments to registers; | |
1625 | 2) Stores to things that must live in memory. This includes | |
1626 | "normal" stores to scalars, but also assignments of large | |
1627 | structures, or constructors of big arrays; | |
1628 | 3) TARGET_EXPRs. | |
1629 | ||
1630 | Let us look at the first two cases, assuming we have "a = b + C": | |
1631 | <modify_expr <var_decl "a"> <plus_expr <var_decl "b"> <constant C>> | |
1632 | If "a" is a GIMPLE register, the assignment to it is free on almost | |
1633 | any target, because "a" usually ends up in a real register. Hence | |
1634 | the only cost of this expression comes from the PLUS_EXPR, and we | |
1635 | can ignore the MODIFY_EXPR. | |
1636 | If "a" is not a GIMPLE register, the assignment to "a" will most | |
1637 | likely be a real store, so the cost of the MODIFY_EXPR is the cost | |
1638 | of moving something into "a", which we compute using the function | |
1639 | estimate_move_cost. | |
1640 | ||
1641 | The third case deals with TARGET_EXPRs, for which the semantics are | |
1642 | that a temporary is assigned, unless the TARGET_EXPR itself is being | |
1643 | assigned to something else. In the latter case we do not need the | |
1644 | temporary. E.g. in <modify_expr <var_decl "a"> <target_expr>>, the | |
1645 | MODIFY_EXPR is free. */ | |
6de9cd9a | 1646 | case INIT_EXPR: |
6de9cd9a | 1647 | case MODIFY_EXPR: |
e5c4f28a RG |
1648 | /* Is the right and side a TARGET_EXPR? */ |
1649 | if (TREE_CODE (TREE_OPERAND (x, 1)) == TARGET_EXPR) | |
1650 | break; | |
1651 | /* ... fall through ... */ | |
1652 | ||
3a5b9284 | 1653 | case TARGET_EXPR: |
e5c4f28a RG |
1654 | x = TREE_OPERAND (x, 0); |
1655 | /* Is this an assignments to a register? */ | |
1656 | if (is_gimple_reg (x)) | |
1657 | break; | |
1658 | /* Otherwise it's a store, so fall through to compute the move cost. */ | |
e21aff8a | 1659 | |
6de9cd9a | 1660 | case CONSTRUCTOR: |
e5c4f28a | 1661 | *count += estimate_move_cost (TREE_TYPE (x)); |
6de9cd9a DN |
1662 | break; |
1663 | ||
e5c4f28a RG |
1664 | /* Assign cost of 1 to usual operations. |
1665 | ??? We may consider mapping RTL costs to this. */ | |
6de9cd9a | 1666 | case COND_EXPR: |
4151978d | 1667 | case VEC_COND_EXPR: |
6de9cd9a DN |
1668 | |
1669 | case PLUS_EXPR: | |
1670 | case MINUS_EXPR: | |
1671 | case MULT_EXPR: | |
1672 | ||
1673 | case FIX_TRUNC_EXPR: | |
1674 | case FIX_CEIL_EXPR: | |
1675 | case FIX_FLOOR_EXPR: | |
1676 | case FIX_ROUND_EXPR: | |
1677 | ||
1678 | case NEGATE_EXPR: | |
1679 | case FLOAT_EXPR: | |
1680 | case MIN_EXPR: | |
1681 | case MAX_EXPR: | |
1682 | case ABS_EXPR: | |
1683 | ||
1684 | case LSHIFT_EXPR: | |
1685 | case RSHIFT_EXPR: | |
1686 | case LROTATE_EXPR: | |
1687 | case RROTATE_EXPR: | |
a6b46ba2 DN |
1688 | case VEC_LSHIFT_EXPR: |
1689 | case VEC_RSHIFT_EXPR: | |
6de9cd9a DN |
1690 | |
1691 | case BIT_IOR_EXPR: | |
1692 | case BIT_XOR_EXPR: | |
1693 | case BIT_AND_EXPR: | |
1694 | case BIT_NOT_EXPR: | |
1695 | ||
1696 | case TRUTH_ANDIF_EXPR: | |
1697 | case TRUTH_ORIF_EXPR: | |
1698 | case TRUTH_AND_EXPR: | |
1699 | case TRUTH_OR_EXPR: | |
1700 | case TRUTH_XOR_EXPR: | |
1701 | case TRUTH_NOT_EXPR: | |
1702 | ||
1703 | case LT_EXPR: | |
1704 | case LE_EXPR: | |
1705 | case GT_EXPR: | |
1706 | case GE_EXPR: | |
1707 | case EQ_EXPR: | |
1708 | case NE_EXPR: | |
1709 | case ORDERED_EXPR: | |
1710 | case UNORDERED_EXPR: | |
1711 | ||
1712 | case UNLT_EXPR: | |
1713 | case UNLE_EXPR: | |
1714 | case UNGT_EXPR: | |
1715 | case UNGE_EXPR: | |
1716 | case UNEQ_EXPR: | |
d1a7edaf | 1717 | case LTGT_EXPR: |
6de9cd9a DN |
1718 | |
1719 | case CONVERT_EXPR: | |
1720 | ||
1721 | case CONJ_EXPR: | |
1722 | ||
1723 | case PREDECREMENT_EXPR: | |
1724 | case PREINCREMENT_EXPR: | |
1725 | case POSTDECREMENT_EXPR: | |
1726 | case POSTINCREMENT_EXPR: | |
1727 | ||
1728 | case SWITCH_EXPR: | |
1729 | ||
1730 | case ASM_EXPR: | |
1731 | ||
16630a2c DN |
1732 | case REALIGN_LOAD_EXPR: |
1733 | ||
61d3cdbb DN |
1734 | case REDUC_MAX_EXPR: |
1735 | case REDUC_MIN_EXPR: | |
1736 | case REDUC_PLUS_EXPR: | |
20f06221 DN |
1737 | case WIDEN_SUM_EXPR: |
1738 | case DOT_PROD_EXPR: | |
1739 | ||
1740 | case WIDEN_MULT_EXPR: | |
61d3cdbb | 1741 | |
6de9cd9a | 1742 | case RESX_EXPR: |
e36f6190 | 1743 | *count += 1; |
6de9cd9a DN |
1744 | break; |
1745 | ||
1ea7e6ad | 1746 | /* Few special cases of expensive operations. This is useful |
6de9cd9a DN |
1747 | to avoid inlining on functions having too many of these. */ |
1748 | case TRUNC_DIV_EXPR: | |
1749 | case CEIL_DIV_EXPR: | |
1750 | case FLOOR_DIV_EXPR: | |
1751 | case ROUND_DIV_EXPR: | |
1752 | case EXACT_DIV_EXPR: | |
1753 | case TRUNC_MOD_EXPR: | |
1754 | case CEIL_MOD_EXPR: | |
1755 | case FLOOR_MOD_EXPR: | |
1756 | case ROUND_MOD_EXPR: | |
1757 | case RDIV_EXPR: | |
1758 | *count += 10; | |
1759 | break; | |
1760 | case CALL_EXPR: | |
1761 | { | |
1762 | tree decl = get_callee_fndecl (x); | |
e5c4f28a | 1763 | tree arg; |
6de9cd9a | 1764 | |
8c96cd51 | 1765 | if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL) |
6de9cd9a DN |
1766 | switch (DECL_FUNCTION_CODE (decl)) |
1767 | { | |
1768 | case BUILT_IN_CONSTANT_P: | |
1769 | *walk_subtrees = 0; | |
1770 | return NULL_TREE; | |
1771 | case BUILT_IN_EXPECT: | |
1772 | return NULL_TREE; | |
1773 | default: | |
1774 | break; | |
1775 | } | |
e5c4f28a | 1776 | |
c7f599d0 JH |
1777 | /* Our cost must be kept in sync with cgraph_estimate_size_after_inlining |
1778 | that does use function declaration to figure out the arguments. */ | |
1779 | if (!decl) | |
1780 | { | |
1781 | for (arg = TREE_OPERAND (x, 1); arg; arg = TREE_CHAIN (arg)) | |
1782 | *count += estimate_move_cost (TREE_TYPE (TREE_VALUE (arg))); | |
1783 | } | |
1784 | else | |
1785 | { | |
1786 | for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg)) | |
1787 | *count += estimate_move_cost (TREE_TYPE (arg)); | |
1788 | } | |
e5c4f28a RG |
1789 | |
1790 | *count += PARAM_VALUE (PARAM_INLINE_CALL_COST); | |
6de9cd9a DN |
1791 | break; |
1792 | } | |
88f4034b DN |
1793 | |
1794 | case OMP_PARALLEL: | |
1795 | case OMP_FOR: | |
1796 | case OMP_SECTIONS: | |
1797 | case OMP_SINGLE: | |
1798 | case OMP_SECTION: | |
1799 | case OMP_MASTER: | |
1800 | case OMP_ORDERED: | |
1801 | case OMP_CRITICAL: | |
1802 | case OMP_ATOMIC: | |
1803 | /* OpenMP directives are generally very expensive. */ | |
1804 | *count += 40; | |
1805 | break; | |
1806 | ||
6de9cd9a | 1807 | default: |
1e128c5f | 1808 | gcc_unreachable (); |
6de9cd9a DN |
1809 | } |
1810 | return NULL; | |
1811 | } | |
1812 | ||
1813 | /* Estimate number of instructions that will be created by expanding EXPR. */ | |
aa4a53af | 1814 | |
6de9cd9a DN |
1815 | int |
1816 | estimate_num_insns (tree expr) | |
1817 | { | |
1818 | int num = 0; | |
e21aff8a SB |
1819 | struct pointer_set_t *visited_nodes; |
1820 | basic_block bb; | |
1821 | block_stmt_iterator bsi; | |
1822 | struct function *my_function; | |
1823 | ||
1824 | /* If we're given an entire function, walk the CFG. */ | |
1825 | if (TREE_CODE (expr) == FUNCTION_DECL) | |
1826 | { | |
1827 | my_function = DECL_STRUCT_FUNCTION (expr); | |
1828 | gcc_assert (my_function && my_function->cfg); | |
1829 | visited_nodes = pointer_set_create (); | |
1830 | FOR_EACH_BB_FN (bb, my_function) | |
1831 | { | |
1832 | for (bsi = bsi_start (bb); | |
1833 | !bsi_end_p (bsi); | |
1834 | bsi_next (&bsi)) | |
1835 | { | |
1836 | walk_tree (bsi_stmt_ptr (bsi), estimate_num_insns_1, | |
1837 | &num, visited_nodes); | |
1838 | } | |
1839 | } | |
1840 | pointer_set_destroy (visited_nodes); | |
1841 | } | |
1842 | else | |
1843 | walk_tree_without_duplicates (&expr, estimate_num_insns_1, &num); | |
1844 | ||
6de9cd9a DN |
1845 | return num; |
1846 | } | |
1847 | ||
426357ea KH |
1848 | typedef struct function *function_p; |
1849 | ||
1850 | DEF_VEC_P(function_p); | |
1851 | DEF_VEC_ALLOC_P(function_p,heap); | |
1852 | ||
e21aff8a | 1853 | /* Initialized with NOGC, making this poisonous to the garbage collector. */ |
426357ea | 1854 | static VEC(function_p,heap) *cfun_stack; |
e21aff8a SB |
1855 | |
1856 | void | |
1857 | push_cfun (struct function *new_cfun) | |
1858 | { | |
426357ea | 1859 | VEC_safe_push (function_p, heap, cfun_stack, cfun); |
e21aff8a SB |
1860 | cfun = new_cfun; |
1861 | } | |
1862 | ||
1863 | void | |
1864 | pop_cfun (void) | |
1865 | { | |
426357ea | 1866 | cfun = VEC_pop (function_p, cfun_stack); |
e21aff8a SB |
1867 | } |
1868 | ||
1869 | /* Install new lexical TREE_BLOCK underneath 'current_block'. */ | |
1870 | static void | |
1871 | add_lexical_block (tree current_block, tree new_block) | |
1872 | { | |
1873 | tree *blk_p; | |
1874 | ||
1875 | /* Walk to the last sub-block. */ | |
1876 | for (blk_p = &BLOCK_SUBBLOCKS (current_block); | |
1877 | *blk_p; | |
1878 | blk_p = &TREE_CHAIN (*blk_p)) | |
1879 | ; | |
1880 | *blk_p = new_block; | |
1881 | BLOCK_SUPERCONTEXT (new_block) = current_block; | |
e21aff8a SB |
1882 | } |
1883 | ||
d4e4baa9 AO |
1884 | /* If *TP is a CALL_EXPR, replace it with its inline expansion. */ |
1885 | ||
e21aff8a SB |
1886 | static bool |
1887 | expand_call_inline (basic_block bb, tree stmt, tree *tp, void *data) | |
d4e4baa9 | 1888 | { |
1b369fae | 1889 | copy_body_data *id; |
d4e4baa9 | 1890 | tree t; |
6de9cd9a | 1891 | tree use_retvar; |
d436bff8 | 1892 | tree fn; |
d4e4baa9 | 1893 | splay_tree st; |
4977bab6 ZW |
1894 | tree args; |
1895 | tree return_slot_addr; | |
7740f00d | 1896 | tree modify_dest; |
6de9cd9a | 1897 | location_t saved_location; |
e21aff8a | 1898 | struct cgraph_edge *cg_edge; |
dc0bfe6a | 1899 | const char *reason; |
e21aff8a SB |
1900 | basic_block return_block; |
1901 | edge e; | |
1902 | block_stmt_iterator bsi, stmt_bsi; | |
1903 | bool successfully_inlined = FALSE; | |
1904 | tree t_step; | |
1905 | tree var; | |
e21aff8a | 1906 | tree decl; |
d4e4baa9 AO |
1907 | |
1908 | /* See what we've got. */ | |
1b369fae | 1909 | id = (copy_body_data *) data; |
d4e4baa9 AO |
1910 | t = *tp; |
1911 | ||
6de9cd9a DN |
1912 | /* Set input_location here so we get the right instantiation context |
1913 | if we call instantiate_decl from inlinable_function_p. */ | |
1914 | saved_location = input_location; | |
1915 | if (EXPR_HAS_LOCATION (t)) | |
1916 | input_location = EXPR_LOCATION (t); | |
1917 | ||
d4e4baa9 AO |
1918 | /* From here on, we're only interested in CALL_EXPRs. */ |
1919 | if (TREE_CODE (t) != CALL_EXPR) | |
6de9cd9a | 1920 | goto egress; |
d4e4baa9 AO |
1921 | |
1922 | /* First, see if we can figure out what function is being called. | |
1923 | If we cannot, then there is no hope of inlining the function. */ | |
1924 | fn = get_callee_fndecl (t); | |
1925 | if (!fn) | |
6de9cd9a | 1926 | goto egress; |
d4e4baa9 | 1927 | |
b58b1157 | 1928 | /* Turn forward declarations into real ones. */ |
d4d1ebc1 | 1929 | fn = cgraph_node (fn)->decl; |
b58b1157 | 1930 | |
a1a0fd4e AO |
1931 | /* If fn is a declaration of a function in a nested scope that was |
1932 | globally declared inline, we don't set its DECL_INITIAL. | |
1933 | However, we can't blindly follow DECL_ABSTRACT_ORIGIN because the | |
1934 | C++ front-end uses it for cdtors to refer to their internal | |
1935 | declarations, that are not real functions. Fortunately those | |
1936 | don't have trees to be saved, so we can tell by checking their | |
1937 | DECL_SAVED_TREE. */ | |
1938 | if (! DECL_INITIAL (fn) | |
1939 | && DECL_ABSTRACT_ORIGIN (fn) | |
1940 | && DECL_SAVED_TREE (DECL_ABSTRACT_ORIGIN (fn))) | |
1941 | fn = DECL_ABSTRACT_ORIGIN (fn); | |
1942 | ||
18c6ada9 JH |
1943 | /* Objective C and fortran still calls tree_rest_of_compilation directly. |
1944 | Kill this check once this is fixed. */ | |
1b369fae | 1945 | if (!id->dst_node->analyzed) |
6de9cd9a | 1946 | goto egress; |
18c6ada9 | 1947 | |
1b369fae | 1948 | cg_edge = cgraph_edge (id->dst_node, stmt); |
18c6ada9 JH |
1949 | |
1950 | /* Constant propagation on argument done during previous inlining | |
1951 | may create new direct call. Produce an edge for it. */ | |
e21aff8a | 1952 | if (!cg_edge) |
18c6ada9 JH |
1953 | { |
1954 | struct cgraph_node *dest = cgraph_node (fn); | |
1955 | ||
6de9cd9a DN |
1956 | /* We have missing edge in the callgraph. This can happen in one case |
1957 | where previous inlining turned indirect call into direct call by | |
1958 | constant propagating arguments. In all other cases we hit a bug | |
1959 | (incorrect node sharing is most common reason for missing edges. */ | |
70f3cc30 | 1960 | gcc_assert (dest->needed || !flag_unit_at_a_time); |
1b369fae | 1961 | cgraph_create_edge (id->dst_node, dest, stmt, |
e42922b1 | 1962 | bb->count, bb->loop_depth)->inline_failed |
18c6ada9 | 1963 | = N_("originally indirect function call not considered for inlining"); |
6de9cd9a | 1964 | goto egress; |
18c6ada9 JH |
1965 | } |
1966 | ||
d4e4baa9 AO |
1967 | /* Don't try to inline functions that are not well-suited to |
1968 | inlining. */ | |
e21aff8a | 1969 | if (!cgraph_inline_p (cg_edge, &reason)) |
a833faa5 | 1970 | { |
7fac66d4 JH |
1971 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) |
1972 | /* Avoid warnings during early inline pass. */ | |
1973 | && (!flag_unit_at_a_time || cgraph_global_info_ready)) | |
2d327012 | 1974 | { |
dee15844 | 1975 | sorry ("inlining failed in call to %q+F: %s", fn, reason); |
2d327012 JH |
1976 | sorry ("called from here"); |
1977 | } | |
1978 | else if (warn_inline && DECL_DECLARED_INLINE_P (fn) | |
1979 | && !DECL_IN_SYSTEM_HEADER (fn) | |
09ebcffa | 1980 | && strlen (reason) |
d63db217 JH |
1981 | && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn)) |
1982 | /* Avoid warnings during early inline pass. */ | |
1983 | && (!flag_unit_at_a_time || cgraph_global_info_ready)) | |
a833faa5 | 1984 | { |
dee15844 JM |
1985 | warning (OPT_Winline, "inlining failed in call to %q+F: %s", |
1986 | fn, reason); | |
3176a0c2 | 1987 | warning (OPT_Winline, "called from here"); |
a833faa5 | 1988 | } |
6de9cd9a | 1989 | goto egress; |
a833faa5 | 1990 | } |
ea99e0be | 1991 | fn = cg_edge->callee->decl; |
d4e4baa9 | 1992 | |
18c6ada9 | 1993 | #ifdef ENABLE_CHECKING |
1b369fae | 1994 | if (cg_edge->callee->decl != id->dst_node->decl) |
e21aff8a | 1995 | verify_cgraph_node (cg_edge->callee); |
18c6ada9 JH |
1996 | #endif |
1997 | ||
e21aff8a SB |
1998 | /* We will be inlining this callee. */ |
1999 | ||
2000 | id->eh_region = lookup_stmt_eh_region (stmt); | |
2001 | ||
2002 | /* Split the block holding the CALL_EXPR. */ | |
2003 | ||
2004 | e = split_block (bb, stmt); | |
2005 | bb = e->src; | |
2006 | return_block = e->dest; | |
2007 | remove_edge (e); | |
2008 | ||
2009 | /* split_block splits before the statement, work around this by moving | |
2010 | the call into the first half_bb. Not pretty, but seems easier than | |
2011 | doing the CFG manipulation by hand when the CALL_EXPR is in the last | |
2012 | statement in BB. */ | |
2013 | stmt_bsi = bsi_last (bb); | |
2014 | bsi = bsi_start (return_block); | |
2015 | if (!bsi_end_p (bsi)) | |
2016 | bsi_move_before (&stmt_bsi, &bsi); | |
2017 | else | |
2018 | { | |
2019 | tree stmt = bsi_stmt (stmt_bsi); | |
736432ee | 2020 | bsi_remove (&stmt_bsi, false); |
e21aff8a SB |
2021 | bsi_insert_after (&bsi, stmt, BSI_NEW_STMT); |
2022 | } | |
2023 | stmt_bsi = bsi_start (return_block); | |
742a37d5 | 2024 | |
d436bff8 AH |
2025 | /* Build a block containing code to initialize the arguments, the |
2026 | actual inline expansion of the body, and a label for the return | |
2027 | statements within the function to jump to. The type of the | |
2028 | statement expression is the return type of the function call. */ | |
e21aff8a SB |
2029 | id->block = make_node (BLOCK); |
2030 | BLOCK_ABSTRACT_ORIGIN (id->block) = fn; | |
3e2844cb | 2031 | BLOCK_SOURCE_LOCATION (id->block) = input_location; |
e21aff8a SB |
2032 | add_lexical_block (TREE_BLOCK (stmt), id->block); |
2033 | ||
d4e4baa9 AO |
2034 | /* Local declarations will be replaced by their equivalents in this |
2035 | map. */ | |
2036 | st = id->decl_map; | |
2037 | id->decl_map = splay_tree_new (splay_tree_compare_pointers, | |
2038 | NULL, NULL); | |
2039 | ||
2040 | /* Initialize the parameters. */ | |
4977bab6 | 2041 | args = TREE_OPERAND (t, 1); |
4977bab6 | 2042 | |
e21aff8a | 2043 | /* Record the function we are about to inline. */ |
1b369fae RH |
2044 | id->src_fn = fn; |
2045 | id->src_node = cg_edge->callee; | |
2046 | ||
2047 | initialize_inlined_parameters (id, args, TREE_OPERAND (t, 2), fn, bb); | |
d4e4baa9 | 2048 | |
ea99e0be | 2049 | if (DECL_INITIAL (fn)) |
acb8f212 JH |
2050 | add_lexical_block (id->block, remap_blocks (DECL_INITIAL (fn), id)); |
2051 | ||
d4e4baa9 AO |
2052 | /* Return statements in the function body will be replaced by jumps |
2053 | to the RET_LABEL. */ | |
d4e4baa9 | 2054 | |
1e128c5f GB |
2055 | gcc_assert (DECL_INITIAL (fn)); |
2056 | gcc_assert (TREE_CODE (DECL_INITIAL (fn)) == BLOCK); | |
23700f65 | 2057 | |
7740f00d | 2058 | /* Find the lhs to which the result of this call is assigned. */ |
fa47911c JM |
2059 | return_slot_addr = NULL; |
2060 | if (TREE_CODE (stmt) == MODIFY_EXPR) | |
81bafd36 | 2061 | { |
fa47911c | 2062 | modify_dest = TREE_OPERAND (stmt, 0); |
81bafd36 ILT |
2063 | |
2064 | /* The function which we are inlining might not return a value, | |
2065 | in which case we should issue a warning that the function | |
2066 | does not return a value. In that case the optimizers will | |
2067 | see that the variable to which the value is assigned was not | |
2068 | initialized. We do not want to issue a warning about that | |
2069 | uninitialized variable. */ | |
2070 | if (DECL_P (modify_dest)) | |
2071 | TREE_NO_WARNING (modify_dest) = 1; | |
fa47911c JM |
2072 | if (CALL_EXPR_RETURN_SLOT_OPT (t)) |
2073 | { | |
2074 | return_slot_addr = build_fold_addr_expr (modify_dest); | |
2075 | modify_dest = NULL; | |
2076 | } | |
81bafd36 | 2077 | } |
7740f00d RH |
2078 | else |
2079 | modify_dest = NULL; | |
2080 | ||
d4e4baa9 | 2081 | /* Declare the return variable for the function. */ |
e21aff8a SB |
2082 | decl = declare_return_variable (id, return_slot_addr, |
2083 | modify_dest, &use_retvar); | |
2084 | /* Do this only if declare_return_variable created a new one. */ | |
2085 | if (decl && !return_slot_addr && decl != modify_dest) | |
2086 | declare_inline_vars (id->block, decl); | |
d4e4baa9 | 2087 | |
e21aff8a SB |
2088 | /* This is it. Duplicate the callee body. Assume callee is |
2089 | pre-gimplified. Note that we must not alter the caller | |
2090 | function in any way before this point, as this CALL_EXPR may be | |
2091 | a self-referential call; if we're calling ourselves, we need to | |
2092 | duplicate our body before altering anything. */ | |
2093 | copy_body (id, bb->count, bb->frequency, bb, return_block); | |
50aadcbc | 2094 | |
acb8f212 | 2095 | /* Add local vars in this inlined callee to caller. */ |
1b369fae | 2096 | t_step = id->src_cfun->unexpanded_var_list; |
acb8f212 JH |
2097 | for (; t_step; t_step = TREE_CHAIN (t_step)) |
2098 | { | |
2099 | var = TREE_VALUE (t_step); | |
2100 | if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var)) | |
2101 | cfun->unexpanded_var_list = tree_cons (NULL_TREE, var, | |
2102 | cfun->unexpanded_var_list); | |
2103 | else | |
2104 | cfun->unexpanded_var_list = tree_cons (NULL_TREE, remap_decl (var, id), | |
2105 | cfun->unexpanded_var_list); | |
2106 | } | |
2107 | ||
d4e4baa9 AO |
2108 | /* Clean up. */ |
2109 | splay_tree_delete (id->decl_map); | |
2110 | id->decl_map = st; | |
2111 | ||
84936f6f | 2112 | /* If the inlined function returns a result that we care about, |
e21aff8a SB |
2113 | clobber the CALL_EXPR with a reference to the return variable. */ |
2114 | if (use_retvar && (TREE_CODE (bsi_stmt (stmt_bsi)) != CALL_EXPR)) | |
2115 | { | |
2116 | *tp = use_retvar; | |
2117 | maybe_clean_or_replace_eh_stmt (stmt, stmt); | |
2118 | } | |
6de9cd9a | 2119 | else |
e21aff8a SB |
2120 | /* We're modifying a TSI owned by gimple_expand_calls_inline(); |
2121 | tsi_delink() will leave the iterator in a sane state. */ | |
736432ee | 2122 | bsi_remove (&stmt_bsi, true); |
d4e4baa9 | 2123 | |
e21aff8a SB |
2124 | bsi_next (&bsi); |
2125 | if (bsi_end_p (bsi)) | |
2126 | tree_purge_dead_eh_edges (return_block); | |
84936f6f | 2127 | |
e21aff8a SB |
2128 | /* If the value of the new expression is ignored, that's OK. We |
2129 | don't warn about this for CALL_EXPRs, so we shouldn't warn about | |
2130 | the equivalent inlined version either. */ | |
2131 | TREE_USED (*tp) = 1; | |
84936f6f | 2132 | |
1eb3331e DB |
2133 | /* Output the inlining info for this abstract function, since it has been |
2134 | inlined. If we don't do this now, we can lose the information about the | |
2135 | variables in the function when the blocks get blown away as soon as we | |
2136 | remove the cgraph node. */ | |
e21aff8a | 2137 | (*debug_hooks->outlining_inline_function) (cg_edge->callee->decl); |
84936f6f | 2138 | |
e72fcfe8 | 2139 | /* Update callgraph if needed. */ |
e21aff8a | 2140 | cgraph_remove_node (cg_edge->callee); |
e72fcfe8 | 2141 | |
e21aff8a SB |
2142 | /* Declare the 'auto' variables added with this inlined body. */ |
2143 | record_vars (BLOCK_VARS (id->block)); | |
2144 | id->block = NULL_TREE; | |
e21aff8a | 2145 | successfully_inlined = TRUE; |
742a37d5 | 2146 | |
6de9cd9a DN |
2147 | egress: |
2148 | input_location = saved_location; | |
e21aff8a | 2149 | return successfully_inlined; |
d4e4baa9 | 2150 | } |
6de9cd9a | 2151 | |
e21aff8a SB |
2152 | /* Expand call statements reachable from STMT_P. |
2153 | We can only have CALL_EXPRs as the "toplevel" tree code or nested | |
2154 | in a MODIFY_EXPR. See tree-gimple.c:get_call_expr_in(). We can | |
2155 | unfortunately not use that function here because we need a pointer | |
2156 | to the CALL_EXPR, not the tree itself. */ | |
2157 | ||
2158 | static bool | |
1b369fae | 2159 | gimple_expand_calls_inline (basic_block bb, copy_body_data *id) |
6de9cd9a | 2160 | { |
e21aff8a | 2161 | block_stmt_iterator bsi; |
6de9cd9a | 2162 | |
e21aff8a SB |
2163 | /* Register specific tree functions. */ |
2164 | tree_register_cfg_hooks (); | |
2165 | for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi)) | |
6de9cd9a | 2166 | { |
e21aff8a SB |
2167 | tree *expr_p = bsi_stmt_ptr (bsi); |
2168 | tree stmt = *expr_p; | |
2169 | ||
2170 | if (TREE_CODE (*expr_p) == MODIFY_EXPR) | |
2171 | expr_p = &TREE_OPERAND (*expr_p, 1); | |
2172 | if (TREE_CODE (*expr_p) == WITH_SIZE_EXPR) | |
2173 | expr_p = &TREE_OPERAND (*expr_p, 0); | |
2174 | if (TREE_CODE (*expr_p) == CALL_EXPR) | |
2175 | if (expand_call_inline (bb, stmt, expr_p, id)) | |
2176 | return true; | |
6de9cd9a | 2177 | } |
e21aff8a | 2178 | return false; |
6de9cd9a DN |
2179 | } |
2180 | ||
d4e4baa9 AO |
2181 | /* Expand calls to inline functions in the body of FN. */ |
2182 | ||
2183 | void | |
46c5ad27 | 2184 | optimize_inline_calls (tree fn) |
d4e4baa9 | 2185 | { |
1b369fae | 2186 | copy_body_data id; |
d4e4baa9 | 2187 | tree prev_fn; |
e21aff8a | 2188 | basic_block bb; |
c5b6f18e MM |
2189 | /* There is no point in performing inlining if errors have already |
2190 | occurred -- and we might crash if we try to inline invalid | |
2191 | code. */ | |
2192 | if (errorcount || sorrycount) | |
2193 | return; | |
2194 | ||
d4e4baa9 AO |
2195 | /* Clear out ID. */ |
2196 | memset (&id, 0, sizeof (id)); | |
2197 | ||
1b369fae RH |
2198 | id.src_node = id.dst_node = cgraph_node (fn); |
2199 | id.dst_fn = fn; | |
d4e4baa9 AO |
2200 | /* Or any functions that aren't finished yet. */ |
2201 | prev_fn = NULL_TREE; | |
2202 | if (current_function_decl) | |
2203 | { | |
1b369fae | 2204 | id.dst_fn = current_function_decl; |
d4e4baa9 AO |
2205 | prev_fn = current_function_decl; |
2206 | } | |
1b369fae RH |
2207 | |
2208 | id.copy_decl = copy_decl_maybe_to_var; | |
2209 | id.transform_call_graph_edges = CB_CGE_DUPLICATE; | |
2210 | id.transform_new_cfg = false; | |
2211 | id.transform_return_to_modify = true; | |
2212 | id.transform_lang_insert_block = false; | |
2213 | ||
e21aff8a | 2214 | push_gimplify_context (); |
d4e4baa9 | 2215 | |
e21aff8a SB |
2216 | /* Reach the trees by walking over the CFG, and note the |
2217 | enclosing basic-blocks in the call edges. */ | |
2218 | /* We walk the blocks going forward, because inlined function bodies | |
2219 | will split id->current_basic_block, and the new blocks will | |
2220 | follow it; we'll trudge through them, processing their CALL_EXPRs | |
2221 | along the way. */ | |
2222 | FOR_EACH_BB (bb) | |
2223 | gimple_expand_calls_inline (bb, &id); | |
d4e4baa9 | 2224 | |
e21aff8a SB |
2225 | pop_gimplify_context (NULL); |
2226 | /* Renumber the (code) basic_blocks consecutively. */ | |
2227 | compact_blocks (); | |
2228 | /* Renumber the lexical scoping (non-code) blocks consecutively. */ | |
2229 | number_blocks (fn); | |
6de9cd9a | 2230 | |
18c6ada9 JH |
2231 | #ifdef ENABLE_CHECKING |
2232 | { | |
2233 | struct cgraph_edge *e; | |
2234 | ||
1b369fae | 2235 | verify_cgraph_node (id.dst_node); |
18c6ada9 JH |
2236 | |
2237 | /* Double check that we inlined everything we are supposed to inline. */ | |
1b369fae | 2238 | for (e = id.dst_node->callees; e; e = e->next_callee) |
1e128c5f | 2239 | gcc_assert (e->inline_failed); |
18c6ada9 JH |
2240 | } |
2241 | #endif | |
e21aff8a SB |
2242 | /* We need to rescale frequencies again to peak at REG_BR_PROB_BASE |
2243 | as inlining loops might increase the maximum. */ | |
2244 | if (ENTRY_BLOCK_PTR->count) | |
2245 | counts_to_freqs (); | |
2246 | fold_cond_expr_cond (); | |
d4e4baa9 AO |
2247 | } |
2248 | ||
aa4a53af RK |
2249 | /* FN is a function that has a complete body, and CLONE is a function whose |
2250 | body is to be set to a copy of FN, mapping argument declarations according | |
2251 | to the ARG_MAP splay_tree. */ | |
d4e4baa9 AO |
2252 | |
2253 | void | |
46c5ad27 | 2254 | clone_body (tree clone, tree fn, void *arg_map) |
d4e4baa9 | 2255 | { |
1b369fae | 2256 | copy_body_data id; |
d4e4baa9 | 2257 | |
aa4a53af | 2258 | /* Clone the body, as if we were making an inline call. But, remap the |
e21aff8a | 2259 | parameters in the callee to the parameters of caller. */ |
d4e4baa9 | 2260 | memset (&id, 0, sizeof (id)); |
1b369fae RH |
2261 | id.src_fn = fn; |
2262 | id.dst_fn = clone; | |
2263 | id.src_cfun = DECL_STRUCT_FUNCTION (fn); | |
d4e4baa9 AO |
2264 | id.decl_map = (splay_tree)arg_map; |
2265 | ||
1b369fae RH |
2266 | id.copy_decl = copy_decl_no_change; |
2267 | id.transform_call_graph_edges = CB_CGE_DUPLICATE; | |
2268 | id.transform_new_cfg = true; | |
2269 | id.transform_return_to_modify = false; | |
2270 | id.transform_lang_insert_block = true; | |
d4e4baa9 | 2271 | |
e21aff8a SB |
2272 | /* We're not inside any EH region. */ |
2273 | id.eh_region = -1; | |
2274 | ||
d4e4baa9 | 2275 | /* Actually copy the body. */ |
e21aff8a | 2276 | append_to_statement_list_force (copy_generic_body (&id), &DECL_SAVED_TREE (clone)); |
d4e4baa9 AO |
2277 | } |
2278 | ||
d4e4baa9 AO |
2279 | /* Passed to walk_tree. Copies the node pointed to, if appropriate. */ |
2280 | ||
2281 | tree | |
46c5ad27 | 2282 | copy_tree_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED) |
d4e4baa9 AO |
2283 | { |
2284 | enum tree_code code = TREE_CODE (*tp); | |
2285 | ||
2286 | /* We make copies of most nodes. */ | |
2287 | if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code)) | |
d4e4baa9 AO |
2288 | || code == TREE_LIST |
2289 | || code == TREE_VEC | |
8843c120 DN |
2290 | || code == TYPE_DECL |
2291 | || code == OMP_CLAUSE) | |
d4e4baa9 AO |
2292 | { |
2293 | /* Because the chain gets clobbered when we make a copy, we save it | |
2294 | here. */ | |
2295 | tree chain = TREE_CHAIN (*tp); | |
6de9cd9a | 2296 | tree new; |
d4e4baa9 AO |
2297 | |
2298 | /* Copy the node. */ | |
6de9cd9a DN |
2299 | new = copy_node (*tp); |
2300 | ||
2301 | /* Propagate mudflap marked-ness. */ | |
2302 | if (flag_mudflap && mf_marked_p (*tp)) | |
2303 | mf_mark (new); | |
2304 | ||
2305 | *tp = new; | |
d4e4baa9 AO |
2306 | |
2307 | /* Now, restore the chain, if appropriate. That will cause | |
2308 | walk_tree to walk into the chain as well. */ | |
50674e96 DN |
2309 | if (code == PARM_DECL |
2310 | || code == TREE_LIST | |
aaf46ef9 | 2311 | || code == OMP_CLAUSE) |
d4e4baa9 AO |
2312 | TREE_CHAIN (*tp) = chain; |
2313 | ||
2314 | /* For now, we don't update BLOCKs when we make copies. So, we | |
6de9cd9a DN |
2315 | have to nullify all BIND_EXPRs. */ |
2316 | if (TREE_CODE (*tp) == BIND_EXPR) | |
2317 | BIND_EXPR_BLOCK (*tp) = NULL_TREE; | |
d4e4baa9 | 2318 | } |
4038c495 GB |
2319 | else if (code == CONSTRUCTOR) |
2320 | { | |
2321 | /* CONSTRUCTOR nodes need special handling because | |
2322 | we need to duplicate the vector of elements. */ | |
2323 | tree new; | |
2324 | ||
2325 | new = copy_node (*tp); | |
2326 | ||
2327 | /* Propagate mudflap marked-ness. */ | |
2328 | if (flag_mudflap && mf_marked_p (*tp)) | |
2329 | mf_mark (new); | |
9f63daea | 2330 | |
4038c495 GB |
2331 | CONSTRUCTOR_ELTS (new) = VEC_copy (constructor_elt, gc, |
2332 | CONSTRUCTOR_ELTS (*tp)); | |
2333 | *tp = new; | |
2334 | } | |
6615c446 | 2335 | else if (TREE_CODE_CLASS (code) == tcc_type) |
d4e4baa9 | 2336 | *walk_subtrees = 0; |
6615c446 | 2337 | else if (TREE_CODE_CLASS (code) == tcc_declaration) |
6de9cd9a | 2338 | *walk_subtrees = 0; |
a396f8ae GK |
2339 | else if (TREE_CODE_CLASS (code) == tcc_constant) |
2340 | *walk_subtrees = 0; | |
1e128c5f GB |
2341 | else |
2342 | gcc_assert (code != STATEMENT_LIST); | |
d4e4baa9 AO |
2343 | return NULL_TREE; |
2344 | } | |
2345 | ||
2346 | /* The SAVE_EXPR pointed to by TP is being copied. If ST contains | |
aa4a53af | 2347 | information indicating to what new SAVE_EXPR this one should be mapped, |
e21aff8a SB |
2348 | use that one. Otherwise, create a new node and enter it in ST. FN is |
2349 | the function into which the copy will be placed. */ | |
d4e4baa9 | 2350 | |
892c7e1e | 2351 | static void |
82c82743 | 2352 | remap_save_expr (tree *tp, void *st_, int *walk_subtrees) |
d4e4baa9 AO |
2353 | { |
2354 | splay_tree st = (splay_tree) st_; | |
2355 | splay_tree_node n; | |
5e20bdd7 | 2356 | tree t; |
d4e4baa9 AO |
2357 | |
2358 | /* See if we already encountered this SAVE_EXPR. */ | |
2359 | n = splay_tree_lookup (st, (splay_tree_key) *tp); | |
d92b4486 | 2360 | |
d4e4baa9 AO |
2361 | /* If we didn't already remap this SAVE_EXPR, do so now. */ |
2362 | if (!n) | |
2363 | { | |
5e20bdd7 | 2364 | t = copy_node (*tp); |
d4e4baa9 | 2365 | |
d4e4baa9 | 2366 | /* Remember this SAVE_EXPR. */ |
5e20bdd7 | 2367 | splay_tree_insert (st, (splay_tree_key) *tp, (splay_tree_value) t); |
350ebd54 | 2368 | /* Make sure we don't remap an already-remapped SAVE_EXPR. */ |
1593ad2e | 2369 | splay_tree_insert (st, (splay_tree_key) t, (splay_tree_value) t); |
d4e4baa9 AO |
2370 | } |
2371 | else | |
5e20bdd7 JZ |
2372 | { |
2373 | /* We've already walked into this SAVE_EXPR; don't do it again. */ | |
2374 | *walk_subtrees = 0; | |
2375 | t = (tree) n->value; | |
2376 | } | |
d4e4baa9 AO |
2377 | |
2378 | /* Replace this SAVE_EXPR with the copy. */ | |
5e20bdd7 | 2379 | *tp = t; |
d4e4baa9 | 2380 | } |
d436bff8 | 2381 | |
aa4a53af RK |
2382 | /* Called via walk_tree. If *TP points to a DECL_STMT for a local label, |
2383 | copies the declaration and enters it in the splay_tree in DATA (which is | |
1b369fae | 2384 | really an `copy_body_data *'). */ |
6de9cd9a DN |
2385 | |
2386 | static tree | |
2387 | mark_local_for_remap_r (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED, | |
2388 | void *data) | |
2389 | { | |
1b369fae | 2390 | copy_body_data *id = (copy_body_data *) data; |
6de9cd9a DN |
2391 | |
2392 | /* Don't walk into types. */ | |
350fae66 RK |
2393 | if (TYPE_P (*tp)) |
2394 | *walk_subtrees = 0; | |
6de9cd9a | 2395 | |
350fae66 | 2396 | else if (TREE_CODE (*tp) == LABEL_EXPR) |
6de9cd9a | 2397 | { |
350fae66 | 2398 | tree decl = TREE_OPERAND (*tp, 0); |
6de9cd9a | 2399 | |
350fae66 | 2400 | /* Copy the decl and remember the copy. */ |
1b369fae | 2401 | insert_decl_map (id, decl, id->copy_decl (decl, id)); |
6de9cd9a DN |
2402 | } |
2403 | ||
2404 | return NULL_TREE; | |
2405 | } | |
2406 | ||
19114537 EC |
2407 | /* Perform any modifications to EXPR required when it is unsaved. Does |
2408 | not recurse into EXPR's subtrees. */ | |
2409 | ||
2410 | static void | |
2411 | unsave_expr_1 (tree expr) | |
2412 | { | |
2413 | switch (TREE_CODE (expr)) | |
2414 | { | |
2415 | case TARGET_EXPR: | |
2416 | /* Don't mess with a TARGET_EXPR that hasn't been expanded. | |
2417 | It's OK for this to happen if it was part of a subtree that | |
2418 | isn't immediately expanded, such as operand 2 of another | |
2419 | TARGET_EXPR. */ | |
2420 | if (TREE_OPERAND (expr, 1)) | |
2421 | break; | |
2422 | ||
2423 | TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3); | |
2424 | TREE_OPERAND (expr, 3) = NULL_TREE; | |
2425 | break; | |
2426 | ||
2427 | default: | |
2428 | break; | |
2429 | } | |
2430 | } | |
2431 | ||
6de9cd9a DN |
2432 | /* Called via walk_tree when an expression is unsaved. Using the |
2433 | splay_tree pointed to by ST (which is really a `splay_tree'), | |
2434 | remaps all local declarations to appropriate replacements. */ | |
d436bff8 AH |
2435 | |
2436 | static tree | |
6de9cd9a | 2437 | unsave_r (tree *tp, int *walk_subtrees, void *data) |
d436bff8 | 2438 | { |
1b369fae | 2439 | copy_body_data *id = (copy_body_data *) data; |
6de9cd9a DN |
2440 | splay_tree st = id->decl_map; |
2441 | splay_tree_node n; | |
2442 | ||
2443 | /* Only a local declaration (variable or label). */ | |
2444 | if ((TREE_CODE (*tp) == VAR_DECL && !TREE_STATIC (*tp)) | |
2445 | || TREE_CODE (*tp) == LABEL_DECL) | |
2446 | { | |
2447 | /* Lookup the declaration. */ | |
2448 | n = splay_tree_lookup (st, (splay_tree_key) *tp); | |
9f63daea | 2449 | |
6de9cd9a DN |
2450 | /* If it's there, remap it. */ |
2451 | if (n) | |
2452 | *tp = (tree) n->value; | |
2453 | } | |
aa4a53af | 2454 | |
6de9cd9a DN |
2455 | else if (TREE_CODE (*tp) == STATEMENT_LIST) |
2456 | copy_statement_list (tp); | |
2457 | else if (TREE_CODE (*tp) == BIND_EXPR) | |
2458 | copy_bind_expr (tp, walk_subtrees, id); | |
2459 | else if (TREE_CODE (*tp) == SAVE_EXPR) | |
82c82743 | 2460 | remap_save_expr (tp, st, walk_subtrees); |
d436bff8 | 2461 | else |
6de9cd9a DN |
2462 | { |
2463 | copy_tree_r (tp, walk_subtrees, NULL); | |
2464 | ||
2465 | /* Do whatever unsaving is required. */ | |
2466 | unsave_expr_1 (*tp); | |
2467 | } | |
2468 | ||
2469 | /* Keep iterating. */ | |
2470 | return NULL_TREE; | |
d436bff8 AH |
2471 | } |
2472 | ||
19114537 EC |
2473 | /* Copies everything in EXPR and replaces variables, labels |
2474 | and SAVE_EXPRs local to EXPR. */ | |
6de9cd9a DN |
2475 | |
2476 | tree | |
19114537 | 2477 | unsave_expr_now (tree expr) |
6de9cd9a | 2478 | { |
1b369fae | 2479 | copy_body_data id; |
6de9cd9a DN |
2480 | |
2481 | /* There's nothing to do for NULL_TREE. */ | |
2482 | if (expr == 0) | |
2483 | return expr; | |
2484 | ||
2485 | /* Set up ID. */ | |
2486 | memset (&id, 0, sizeof (id)); | |
1b369fae RH |
2487 | id.src_fn = current_function_decl; |
2488 | id.dst_fn = current_function_decl; | |
6de9cd9a DN |
2489 | id.decl_map = splay_tree_new (splay_tree_compare_pointers, NULL, NULL); |
2490 | ||
1b369fae RH |
2491 | id.copy_decl = copy_decl_no_change; |
2492 | id.transform_call_graph_edges = CB_CGE_DUPLICATE; | |
2493 | id.transform_new_cfg = false; | |
2494 | id.transform_return_to_modify = false; | |
2495 | id.transform_lang_insert_block = false; | |
2496 | ||
6de9cd9a DN |
2497 | /* Walk the tree once to find local labels. */ |
2498 | walk_tree_without_duplicates (&expr, mark_local_for_remap_r, &id); | |
2499 | ||
2500 | /* Walk the tree again, copying, remapping, and unsaving. */ | |
2501 | walk_tree (&expr, unsave_r, &id, NULL); | |
2502 | ||
2503 | /* Clean up. */ | |
2504 | splay_tree_delete (id.decl_map); | |
2505 | ||
2506 | return expr; | |
2507 | } | |
2508 | ||
2509 | /* Allow someone to determine if SEARCH is a child of TOP from gdb. */ | |
aa4a53af | 2510 | |
6de9cd9a DN |
2511 | static tree |
2512 | debug_find_tree_1 (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED, void *data) | |
2513 | { | |
2514 | if (*tp == data) | |
2515 | return (tree) data; | |
2516 | else | |
2517 | return NULL; | |
2518 | } | |
2519 | ||
6de9cd9a DN |
2520 | bool |
2521 | debug_find_tree (tree top, tree search) | |
2522 | { | |
2523 | return walk_tree_without_duplicates (&top, debug_find_tree_1, search) != 0; | |
2524 | } | |
2525 | ||
e21aff8a | 2526 | |
6de9cd9a DN |
2527 | /* Declare the variables created by the inliner. Add all the variables in |
2528 | VARS to BIND_EXPR. */ | |
2529 | ||
2530 | static void | |
e21aff8a | 2531 | declare_inline_vars (tree block, tree vars) |
6de9cd9a | 2532 | { |
84936f6f RH |
2533 | tree t; |
2534 | for (t = vars; t; t = TREE_CHAIN (t)) | |
2535 | DECL_SEEN_IN_BIND_EXPR_P (t) = 1; | |
6de9cd9a | 2536 | |
e21aff8a SB |
2537 | if (block) |
2538 | BLOCK_VARS (block) = chainon (BLOCK_VARS (block), vars); | |
2539 | } | |
2540 | ||
19734dd8 RL |
2541 | |
2542 | /* Copy NODE (which must be a DECL). The DECL originally was in the FROM_FN, | |
1b369fae RH |
2543 | but now it will be in the TO_FN. PARM_TO_VAR means enable PARM_DECL to |
2544 | VAR_DECL translation. */ | |
19734dd8 | 2545 | |
1b369fae RH |
2546 | static tree |
2547 | copy_decl_for_dup_finish (copy_body_data *id, tree decl, tree copy) | |
19734dd8 | 2548 | { |
19734dd8 RL |
2549 | /* Don't generate debug information for the copy if we wouldn't have |
2550 | generated it for the copy either. */ | |
2551 | DECL_ARTIFICIAL (copy) = DECL_ARTIFICIAL (decl); | |
2552 | DECL_IGNORED_P (copy) = DECL_IGNORED_P (decl); | |
2553 | ||
2554 | /* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what | |
2555 | declaration inspired this copy. */ | |
2556 | DECL_ABSTRACT_ORIGIN (copy) = DECL_ORIGIN (decl); | |
2557 | ||
2558 | /* The new variable/label has no RTL, yet. */ | |
68a976f2 RL |
2559 | if (CODE_CONTAINS_STRUCT (TREE_CODE (copy), TS_DECL_WRTL) |
2560 | && !TREE_STATIC (copy) && !DECL_EXTERNAL (copy)) | |
19734dd8 RL |
2561 | SET_DECL_RTL (copy, NULL_RTX); |
2562 | ||
2563 | /* These args would always appear unused, if not for this. */ | |
2564 | TREE_USED (copy) = 1; | |
2565 | ||
2566 | /* Set the context for the new declaration. */ | |
2567 | if (!DECL_CONTEXT (decl)) | |
2568 | /* Globals stay global. */ | |
2569 | ; | |
1b369fae | 2570 | else if (DECL_CONTEXT (decl) != id->src_fn) |
19734dd8 RL |
2571 | /* Things that weren't in the scope of the function we're inlining |
2572 | from aren't in the scope we're inlining to, either. */ | |
2573 | ; | |
2574 | else if (TREE_STATIC (decl)) | |
2575 | /* Function-scoped static variables should stay in the original | |
2576 | function. */ | |
2577 | ; | |
2578 | else | |
2579 | /* Ordinary automatic local variables are now in the scope of the | |
2580 | new function. */ | |
1b369fae | 2581 | DECL_CONTEXT (copy) = id->dst_fn; |
19734dd8 RL |
2582 | |
2583 | return copy; | |
2584 | } | |
2585 | ||
1b369fae RH |
2586 | static tree |
2587 | copy_decl_to_var (tree decl, copy_body_data *id) | |
2588 | { | |
2589 | tree copy, type; | |
2590 | ||
2591 | gcc_assert (TREE_CODE (decl) == PARM_DECL | |
2592 | || TREE_CODE (decl) == RESULT_DECL); | |
2593 | ||
2594 | type = TREE_TYPE (decl); | |
2595 | ||
2596 | copy = build_decl (VAR_DECL, DECL_NAME (decl), type); | |
2597 | TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl); | |
2598 | TREE_READONLY (copy) = TREE_READONLY (decl); | |
2599 | TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl); | |
2600 | DECL_COMPLEX_GIMPLE_REG_P (copy) = DECL_COMPLEX_GIMPLE_REG_P (decl); | |
2601 | ||
2602 | return copy_decl_for_dup_finish (id, decl, copy); | |
2603 | } | |
2604 | ||
2605 | static tree | |
2606 | copy_decl_no_change (tree decl, copy_body_data *id) | |
2607 | { | |
2608 | tree copy; | |
2609 | ||
2610 | copy = copy_node (decl); | |
2611 | ||
2612 | /* The COPY is not abstract; it will be generated in DST_FN. */ | |
2613 | DECL_ABSTRACT (copy) = 0; | |
2614 | lang_hooks.dup_lang_specific_decl (copy); | |
2615 | ||
2616 | /* TREE_ADDRESSABLE isn't used to indicate that a label's address has | |
2617 | been taken; it's for internal bookkeeping in expand_goto_internal. */ | |
2618 | if (TREE_CODE (copy) == LABEL_DECL) | |
2619 | { | |
2620 | TREE_ADDRESSABLE (copy) = 0; | |
2621 | LABEL_DECL_UID (copy) = -1; | |
2622 | } | |
2623 | ||
2624 | return copy_decl_for_dup_finish (id, decl, copy); | |
2625 | } | |
2626 | ||
2627 | static tree | |
2628 | copy_decl_maybe_to_var (tree decl, copy_body_data *id) | |
2629 | { | |
2630 | if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == RESULT_DECL) | |
2631 | return copy_decl_to_var (decl, id); | |
2632 | else | |
2633 | return copy_decl_no_change (decl, id); | |
2634 | } | |
2635 | ||
19734dd8 RL |
2636 | /* Return a copy of the function's argument tree. */ |
2637 | static tree | |
1b369fae | 2638 | copy_arguments_for_versioning (tree orig_parm, copy_body_data * id) |
19734dd8 RL |
2639 | { |
2640 | tree *arg_copy, *parg; | |
2641 | ||
2642 | arg_copy = &orig_parm; | |
2643 | for (parg = arg_copy; *parg; parg = &TREE_CHAIN (*parg)) | |
2644 | { | |
2645 | tree new = remap_decl (*parg, id); | |
2646 | lang_hooks.dup_lang_specific_decl (new); | |
2647 | TREE_CHAIN (new) = TREE_CHAIN (*parg); | |
2648 | *parg = new; | |
2649 | } | |
2650 | return orig_parm; | |
2651 | } | |
2652 | ||
2653 | /* Return a copy of the function's static chain. */ | |
2654 | static tree | |
1b369fae | 2655 | copy_static_chain (tree static_chain, copy_body_data * id) |
19734dd8 RL |
2656 | { |
2657 | tree *chain_copy, *pvar; | |
2658 | ||
2659 | chain_copy = &static_chain; | |
2660 | for (pvar = chain_copy; *pvar; pvar = &TREE_CHAIN (*pvar)) | |
2661 | { | |
2662 | tree new = remap_decl (*pvar, id); | |
2663 | lang_hooks.dup_lang_specific_decl (new); | |
2664 | TREE_CHAIN (new) = TREE_CHAIN (*pvar); | |
2665 | *pvar = new; | |
2666 | } | |
2667 | return static_chain; | |
2668 | } | |
2669 | ||
2670 | /* Return true if the function is allowed to be versioned. | |
2671 | This is a guard for the versioning functionality. */ | |
2672 | bool | |
2673 | tree_versionable_function_p (tree fndecl) | |
2674 | { | |
2675 | if (fndecl == NULL_TREE) | |
2676 | return false; | |
2677 | /* ??? There are cases where a function is | |
2678 | uninlinable but can be versioned. */ | |
2679 | if (!tree_inlinable_function_p (fndecl)) | |
2680 | return false; | |
2681 | ||
2682 | return true; | |
2683 | } | |
2684 | ||
2685 | /* Create a copy of a function's tree. | |
2686 | OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes | |
2687 | of the original function and the new copied function | |
2688 | respectively. In case we want to replace a DECL | |
2689 | tree with another tree while duplicating the function's | |
2690 | body, TREE_MAP represents the mapping between these | |
ea99e0be JH |
2691 | trees. If UPDATE_CLONES is set, the call_stmt fields |
2692 | of edges of clones of the function will be updated. */ | |
19734dd8 | 2693 | void |
ea99e0be JH |
2694 | tree_function_versioning (tree old_decl, tree new_decl, varray_type tree_map, |
2695 | bool update_clones) | |
19734dd8 RL |
2696 | { |
2697 | struct cgraph_node *old_version_node; | |
2698 | struct cgraph_node *new_version_node; | |
1b369fae | 2699 | copy_body_data id; |
19734dd8 RL |
2700 | tree p, new_fndecl; |
2701 | unsigned i; | |
2702 | struct ipa_replace_map *replace_info; | |
2703 | basic_block old_entry_block; | |
2704 | tree t_step; | |
2705 | ||
2706 | gcc_assert (TREE_CODE (old_decl) == FUNCTION_DECL | |
2707 | && TREE_CODE (new_decl) == FUNCTION_DECL); | |
2708 | DECL_POSSIBLY_INLINED (old_decl) = 1; | |
2709 | ||
2710 | old_version_node = cgraph_node (old_decl); | |
2711 | new_version_node = cgraph_node (new_decl); | |
2712 | ||
2713 | allocate_struct_function (new_decl); | |
2714 | /* Cfun points to the new allocated function struct at this point. */ | |
2715 | cfun->function_end_locus = DECL_SOURCE_LOCATION (new_decl); | |
2716 | ||
2717 | DECL_ARTIFICIAL (new_decl) = 1; | |
2718 | DECL_ABSTRACT_ORIGIN (new_decl) = DECL_ORIGIN (old_decl); | |
2719 | ||
2720 | /* Generate a new name for the new version. */ | |
ea99e0be | 2721 | if (!update_clones) |
1b369fae | 2722 | DECL_NAME (new_decl) = create_tmp_var_name (NULL); |
19734dd8 RL |
2723 | /* Create a new SYMBOL_REF rtx for the new name. */ |
2724 | if (DECL_RTL (old_decl) != NULL) | |
2725 | { | |
2726 | SET_DECL_RTL (new_decl, copy_rtx (DECL_RTL (old_decl))); | |
2727 | XEXP (DECL_RTL (new_decl), 0) = | |
2728 | gen_rtx_SYMBOL_REF (GET_MODE (XEXP (DECL_RTL (old_decl), 0)), | |
2729 | IDENTIFIER_POINTER (DECL_NAME (new_decl))); | |
2730 | } | |
2731 | ||
2732 | /* Prepare the data structures for the tree copy. */ | |
2733 | memset (&id, 0, sizeof (id)); | |
2734 | ||
19734dd8 | 2735 | id.decl_map = splay_tree_new (splay_tree_compare_pointers, NULL, NULL); |
1b369fae RH |
2736 | id.src_fn = old_decl; |
2737 | id.dst_fn = new_decl; | |
2738 | id.src_node = old_version_node; | |
2739 | id.dst_node = new_version_node; | |
2740 | id.src_cfun = DECL_STRUCT_FUNCTION (old_decl); | |
19734dd8 | 2741 | |
1b369fae RH |
2742 | id.copy_decl = copy_decl_no_change; |
2743 | id.transform_call_graph_edges | |
2744 | = update_clones ? CB_CGE_MOVE_CLONES : CB_CGE_MOVE; | |
2745 | id.transform_new_cfg = true; | |
2746 | id.transform_return_to_modify = false; | |
2747 | id.transform_lang_insert_block = false; | |
2748 | ||
19734dd8 RL |
2749 | current_function_decl = new_decl; |
2750 | ||
2751 | /* Copy the function's static chain. */ | |
2752 | p = DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl; | |
2753 | if (p) | |
2754 | DECL_STRUCT_FUNCTION (new_decl)->static_chain_decl = | |
2755 | copy_static_chain (DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl, | |
2756 | &id); | |
2757 | /* Copy the function's arguments. */ | |
2758 | if (DECL_ARGUMENTS (old_decl) != NULL_TREE) | |
2759 | DECL_ARGUMENTS (new_decl) = | |
2760 | copy_arguments_for_versioning (DECL_ARGUMENTS (old_decl), &id); | |
2761 | ||
2762 | /* If there's a tree_map, prepare for substitution. */ | |
2763 | if (tree_map) | |
2764 | for (i = 0; i < VARRAY_ACTIVE_SIZE (tree_map); i++) | |
2765 | { | |
2766 | replace_info = VARRAY_GENERIC_PTR (tree_map, i); | |
1b369fae | 2767 | if (replace_info->replace_p) |
19734dd8 RL |
2768 | insert_decl_map (&id, replace_info->old_tree, |
2769 | replace_info->new_tree); | |
19734dd8 RL |
2770 | } |
2771 | ||
1b369fae | 2772 | DECL_INITIAL (new_decl) = remap_blocks (DECL_INITIAL (id.src_fn), &id); |
19734dd8 RL |
2773 | |
2774 | /* Renumber the lexical scoping (non-code) blocks consecutively. */ | |
1b369fae | 2775 | number_blocks (id.dst_fn); |
19734dd8 RL |
2776 | |
2777 | if (DECL_STRUCT_FUNCTION (old_decl)->unexpanded_var_list != NULL_TREE) | |
2778 | /* Add local vars. */ | |
2779 | for (t_step = DECL_STRUCT_FUNCTION (old_decl)->unexpanded_var_list; | |
2780 | t_step; t_step = TREE_CHAIN (t_step)) | |
2781 | { | |
2782 | tree var = TREE_VALUE (t_step); | |
2783 | if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var)) | |
2784 | cfun->unexpanded_var_list = tree_cons (NULL_TREE, var, | |
2785 | cfun->unexpanded_var_list); | |
2786 | else | |
2787 | cfun->unexpanded_var_list = | |
2788 | tree_cons (NULL_TREE, remap_decl (var, &id), | |
2789 | cfun->unexpanded_var_list); | |
2790 | } | |
2791 | ||
2792 | /* Copy the Function's body. */ | |
2793 | old_entry_block = ENTRY_BLOCK_PTR_FOR_FUNCTION | |
2794 | (DECL_STRUCT_FUNCTION (old_decl)); | |
2795 | new_fndecl = copy_body (&id, | |
2796 | old_entry_block->count, | |
2797 | old_entry_block->frequency, NULL, NULL); | |
2798 | ||
2799 | DECL_SAVED_TREE (new_decl) = DECL_SAVED_TREE (new_fndecl); | |
2800 | ||
2801 | DECL_STRUCT_FUNCTION (new_decl)->cfg = | |
2802 | DECL_STRUCT_FUNCTION (new_fndecl)->cfg; | |
2803 | DECL_STRUCT_FUNCTION (new_decl)->eh = DECL_STRUCT_FUNCTION (new_fndecl)->eh; | |
2804 | DECL_STRUCT_FUNCTION (new_decl)->ib_boundaries_block = | |
2805 | DECL_STRUCT_FUNCTION (new_fndecl)->ib_boundaries_block; | |
2806 | DECL_STRUCT_FUNCTION (new_decl)->last_label_uid = | |
2807 | DECL_STRUCT_FUNCTION (new_fndecl)->last_label_uid; | |
2808 | ||
2809 | if (DECL_RESULT (old_decl) != NULL_TREE) | |
2810 | { | |
2811 | tree *res_decl = &DECL_RESULT (old_decl); | |
2812 | DECL_RESULT (new_decl) = remap_decl (*res_decl, &id); | |
2813 | lang_hooks.dup_lang_specific_decl (DECL_RESULT (new_decl)); | |
2814 | } | |
2815 | ||
2816 | current_function_decl = NULL; | |
2817 | /* Renumber the lexical scoping (non-code) blocks consecutively. */ | |
2818 | number_blocks (new_decl); | |
2819 | ||
2820 | /* Clean up. */ | |
2821 | splay_tree_delete (id.decl_map); | |
2822 | fold_cond_expr_cond (); | |
2823 | return; | |
2824 | } | |
2825 | ||
52dd234b RH |
2826 | /* Duplicate a type, fields and all. */ |
2827 | ||
2828 | tree | |
2829 | build_duplicate_type (tree type) | |
2830 | { | |
1b369fae | 2831 | struct copy_body_data id; |
52dd234b RH |
2832 | |
2833 | memset (&id, 0, sizeof (id)); | |
1b369fae RH |
2834 | id.src_fn = current_function_decl; |
2835 | id.dst_fn = current_function_decl; | |
2836 | id.src_cfun = cfun; | |
52dd234b RH |
2837 | id.decl_map = splay_tree_new (splay_tree_compare_pointers, NULL, NULL); |
2838 | ||
2839 | type = remap_type_1 (type, &id); | |
2840 | ||
2841 | splay_tree_delete (id.decl_map); | |
2842 | ||
2843 | return type; | |
2844 | } |