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fee8b6da | 1 | /* Callgraph transformations to handle inlining |
5624e564 | 2 | Copyright (C) 2003-2015 Free Software Foundation, Inc. |
fee8b6da JH |
3 | Contributed by Jan Hubicka |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 3, or (at your option) any later | |
10 | version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | /* The inline decisions are stored in callgraph in "inline plan" and | |
22 | applied later. | |
23 | ||
24 | To mark given call inline, use inline_call function. | |
25 | The function marks the edge inlinable and, if necessary, produces | |
26 | virtual clone in the callgraph representing the new copy of callee's | |
27 | function body. | |
28 | ||
29 | The inline plan is applied on given function body by inline_transform. */ | |
30 | ||
31 | #include "config.h" | |
32 | #include "system.h" | |
33 | #include "coretypes.h" | |
34 | #include "tm.h" | |
40e23961 MC |
35 | #include "hash-set.h" |
36 | #include "machmode.h" | |
37 | #include "vec.h" | |
38 | #include "double-int.h" | |
39 | #include "input.h" | |
40 | #include "alias.h" | |
41 | #include "symtab.h" | |
42 | #include "wide-int.h" | |
43 | #include "inchash.h" | |
fee8b6da JH |
44 | #include "tree.h" |
45 | #include "langhooks.h" | |
fee8b6da JH |
46 | #include "intl.h" |
47 | #include "coverage.h" | |
48 | #include "ggc.h" | |
442b4905 | 49 | #include "tree-cfg.h" |
c582198b AM |
50 | #include "hash-map.h" |
51 | #include "is-a.h" | |
52 | #include "plugin-api.h" | |
c582198b AM |
53 | #include "hard-reg-set.h" |
54 | #include "input.h" | |
55 | #include "function.h" | |
56 | #include "ipa-ref.h" | |
57 | #include "cgraph.h" | |
58 | #include "alloc-pool.h" | |
dd912cb8 | 59 | #include "symbol-summary.h" |
fee8b6da JH |
60 | #include "ipa-prop.h" |
61 | #include "ipa-inline.h" | |
62 | #include "tree-inline.h" | |
516e0768 | 63 | #include "tree-pass.h" |
fee8b6da JH |
64 | |
65 | int ncalls_inlined; | |
66 | int nfunctions_inlined; | |
09ce3660 | 67 | bool speculation_removed; |
fee8b6da | 68 | |
898b8927 | 69 | /* Scale frequency of NODE edges by FREQ_SCALE. */ |
fee8b6da JH |
70 | |
71 | static void | |
72 | update_noncloned_frequencies (struct cgraph_node *node, | |
898b8927 | 73 | int freq_scale) |
fee8b6da JH |
74 | { |
75 | struct cgraph_edge *e; | |
76 | ||
77 | /* We do not want to ignore high loop nest after freq drops to 0. */ | |
78 | if (!freq_scale) | |
79 | freq_scale = 1; | |
80 | for (e = node->callees; e; e = e->next_callee) | |
81 | { | |
fee8b6da JH |
82 | e->frequency = e->frequency * (gcov_type) freq_scale / CGRAPH_FREQ_BASE; |
83 | if (e->frequency > CGRAPH_FREQ_MAX) | |
84 | e->frequency = CGRAPH_FREQ_MAX; | |
85 | if (!e->inline_failed) | |
898b8927 JH |
86 | update_noncloned_frequencies (e->callee, freq_scale); |
87 | } | |
88 | for (e = node->indirect_calls; e; e = e->next_callee) | |
89 | { | |
90 | e->frequency = e->frequency * (gcov_type) freq_scale / CGRAPH_FREQ_BASE; | |
91 | if (e->frequency > CGRAPH_FREQ_MAX) | |
92 | e->frequency = CGRAPH_FREQ_MAX; | |
fee8b6da JH |
93 | } |
94 | } | |
95 | ||
a5b1779f JH |
96 | /* We removed or are going to remove the last call to NODE. |
97 | Return true if we can and want proactively remove the NODE now. | |
98 | This is important to do, since we want inliner to know when offline | |
99 | copy of function was removed. */ | |
100 | ||
101 | static bool | |
d142079a | 102 | can_remove_node_now_p_1 (struct cgraph_node *node, struct cgraph_edge *e) |
a5b1779f | 103 | { |
d142079a JH |
104 | ipa_ref *ref; |
105 | ||
106 | FOR_EACH_ALIAS (node, ref) | |
107 | { | |
108 | cgraph_node *alias = dyn_cast <cgraph_node *> (ref->referring); | |
109 | if ((alias->callers && alias->callers != e) | |
110 | || !can_remove_node_now_p_1 (alias, e)) | |
111 | return false; | |
112 | } | |
a5b1779f JH |
113 | /* FIXME: When address is taken of DECL_EXTERNAL function we still |
114 | can remove its offline copy, but we would need to keep unanalyzed node in | |
a6a543bf JH |
115 | the callgraph so references can point to it. |
116 | ||
117 | Also for comdat group we can ignore references inside a group as we | |
118 | want to prove the group as a whole to be dead. */ | |
67348ccc | 119 | return (!node->address_taken |
a6a543bf | 120 | && node->can_remove_if_no_direct_calls_and_refs_p () |
a5b1779f JH |
121 | /* Inlining might enable more devirtualizing, so we want to remove |
122 | those only after all devirtualizable virtual calls are processed. | |
123 | Lacking may edges in callgraph we just preserve them post | |
124 | inlining. */ | |
d142079a JH |
125 | && (!DECL_VIRTUAL_P (node->decl) |
126 | || !opt_for_fn (node->decl, flag_devirtualize)) | |
a5b1779f JH |
127 | /* During early inlining some unanalyzed cgraph nodes might be in the |
128 | callgraph and they might reffer the function in question. */ | |
31acf1bb | 129 | && !cgraph_new_nodes.exists ()); |
a5b1779f JH |
130 | } |
131 | ||
6c69a029 JH |
132 | /* We are going to eliminate last direct call to NODE (or alias of it) via edge E. |
133 | Verify that the NODE can be removed from unit and if it is contained in comdat | |
134 | group that the whole comdat group is removable. */ | |
135 | ||
136 | static bool | |
137 | can_remove_node_now_p (struct cgraph_node *node, struct cgraph_edge *e) | |
138 | { | |
139 | struct cgraph_node *next; | |
d142079a | 140 | if (!can_remove_node_now_p_1 (node, e)) |
6c69a029 JH |
141 | return false; |
142 | ||
143 | /* When we see same comdat group, we need to be sure that all | |
144 | items can be removed. */ | |
8ccc8042 | 145 | if (!node->same_comdat_group || !node->externally_visible) |
6c69a029 | 146 | return true; |
d52f5295 ML |
147 | for (next = dyn_cast<cgraph_node *> (node->same_comdat_group); |
148 | next != node; next = dyn_cast<cgraph_node *> (next->same_comdat_group)) | |
d142079a JH |
149 | { |
150 | if (next->alias) | |
151 | continue; | |
152 | if ((next->callers && next->callers != e) | |
153 | || !can_remove_node_now_p_1 (next, e)) | |
154 | return false; | |
155 | } | |
6c69a029 JH |
156 | return true; |
157 | } | |
158 | ||
d83fa499 EB |
159 | /* Return true if NODE is a master clone with non-inline clones. */ |
160 | ||
161 | static bool | |
162 | master_clone_with_noninline_clones_p (struct cgraph_node *node) | |
163 | { | |
164 | if (node->clone_of) | |
165 | return false; | |
166 | ||
167 | for (struct cgraph_node *n = node->clones; n; n = n->next_sibling_clone) | |
168 | if (n->decl != node->decl) | |
169 | return true; | |
170 | ||
171 | return false; | |
172 | } | |
fee8b6da JH |
173 | |
174 | /* E is expected to be an edge being inlined. Clone destination node of | |
175 | the edge and redirect it to the new clone. | |
176 | DUPLICATE is used for bookkeeping on whether we are actually creating new | |
177 | clones or re-using node originally representing out-of-line function call. | |
bd936951 JH |
178 | By default the offline copy is removed, when it appears dead after inlining. |
179 | UPDATE_ORIGINAL prevents this transformation. | |
180 | If OVERALL_SIZE is non-NULL, the size is updated to reflect the | |
181 | transformation. | |
182 | FREQ_SCALE specify the scaling of frequencies of call sites. */ | |
fee8b6da JH |
183 | |
184 | void | |
185 | clone_inlined_nodes (struct cgraph_edge *e, bool duplicate, | |
bd936951 | 186 | bool update_original, int *overall_size, int freq_scale) |
fee8b6da | 187 | { |
44a60244 | 188 | struct cgraph_node *inlining_into; |
09ce3660 | 189 | struct cgraph_edge *next; |
44a60244 MJ |
190 | |
191 | if (e->caller->global.inlined_to) | |
192 | inlining_into = e->caller->global.inlined_to; | |
193 | else | |
194 | inlining_into = e->caller; | |
195 | ||
fee8b6da JH |
196 | if (duplicate) |
197 | { | |
198 | /* We may eliminate the need for out-of-line copy to be output. | |
199 | In that case just go ahead and re-use it. This is not just an | |
200 | memory optimization. Making offline copy of fuction disappear | |
201 | from the program will improve future decisions on inlining. */ | |
202 | if (!e->callee->callers->next_caller | |
203 | /* Recursive inlining never wants the master clone to | |
204 | be overwritten. */ | |
205 | && update_original | |
d83fa499 EB |
206 | && can_remove_node_now_p (e->callee, e) |
207 | /* We cannot overwrite a master clone with non-inline clones | |
208 | until after these clones are materialized. */ | |
209 | && !master_clone_with_noninline_clones_p (e->callee)) | |
fee8b6da | 210 | { |
6c69a029 JH |
211 | /* TODO: When callee is in a comdat group, we could remove all of it, |
212 | including all inline clones inlined into it. That would however | |
213 | need small function inlining to register edge removal hook to | |
214 | maintain the priority queue. | |
215 | ||
216 | For now we keep the ohter functions in the group in program until | |
217 | cgraph_remove_unreachable_functions gets rid of them. */ | |
fee8b6da | 218 | gcc_assert (!e->callee->global.inlined_to); |
b91b562c | 219 | e->callee->remove_from_same_comdat_group (); |
bb1e543c JH |
220 | if (e->callee->definition |
221 | && inline_account_function_p (e->callee)) | |
fee8b6da | 222 | { |
bb1e543c | 223 | gcc_assert (!e->callee->alias); |
fee8b6da | 224 | if (overall_size) |
9a1e784a | 225 | *overall_size -= inline_summaries->get (e->callee)->size; |
fee8b6da JH |
226 | nfunctions_inlined++; |
227 | } | |
228 | duplicate = false; | |
67348ccc | 229 | e->callee->externally_visible = false; |
898b8927 | 230 | update_noncloned_frequencies (e->callee, e->frequency); |
fee8b6da JH |
231 | } |
232 | else | |
233 | { | |
234 | struct cgraph_node *n; | |
bd936951 JH |
235 | |
236 | if (freq_scale == -1) | |
237 | freq_scale = e->frequency; | |
d52f5295 ML |
238 | n = e->callee->create_clone (e->callee->decl, |
239 | MIN (e->count, e->callee->count), | |
240 | freq_scale, | |
241 | update_original, vNULL, true, | |
242 | inlining_into, | |
243 | NULL); | |
4ad08ee8 | 244 | n->used_as_abstract_origin = e->callee->used_as_abstract_origin; |
3dafb85c | 245 | e->redirect_callee (n); |
fee8b6da JH |
246 | } |
247 | } | |
65d630d4 | 248 | else |
b91b562c | 249 | e->callee->remove_from_same_comdat_group (); |
fee8b6da | 250 | |
44a60244 | 251 | e->callee->global.inlined_to = inlining_into; |
fee8b6da JH |
252 | |
253 | /* Recursively clone all bodies. */ | |
09ce3660 JH |
254 | for (e = e->callee->callees; e; e = next) |
255 | { | |
256 | next = e->next_callee; | |
257 | if (!e->inline_failed) | |
bd936951 | 258 | clone_inlined_nodes (e, duplicate, update_original, overall_size, freq_scale); |
09ce3660 JH |
259 | if (e->speculative && !speculation_useful_p (e, true)) |
260 | { | |
3dafb85c | 261 | e->resolve_speculation (NULL); |
09ce3660 JH |
262 | speculation_removed = true; |
263 | } | |
264 | } | |
fee8b6da JH |
265 | } |
266 | ||
4fd94d1e MJ |
267 | /* Mark all call graph edges coming out of NODE and all nodes that have been |
268 | inlined to it as in_polymorphic_cdtor. */ | |
269 | ||
270 | static void | |
271 | mark_all_inlined_calls_cdtor (cgraph_node *node) | |
272 | { | |
273 | for (cgraph_edge *cs = node->callees; cs; cs = cs->next_callee) | |
274 | { | |
275 | cs->in_polymorphic_cdtor = true; | |
276 | if (!cs->inline_failed) | |
277 | mark_all_inlined_calls_cdtor (cs->callee); | |
278 | } | |
279 | for (cgraph_edge *cs = node->indirect_calls; cs; cs = cs->next_callee) | |
280 | cs->in_polymorphic_cdtor = true; | |
281 | } | |
282 | ||
fee8b6da JH |
283 | |
284 | /* Mark edge E as inlined and update callgraph accordingly. UPDATE_ORIGINAL | |
285 | specify whether profile of original function should be updated. If any new | |
286 | indirect edges are discovered in the process, add them to NEW_EDGES, unless | |
c170d40f JH |
287 | it is NULL. If UPDATE_OVERALL_SUMMARY is false, do not bother to recompute overall |
288 | size of caller after inlining. Caller is required to eventually do it via | |
289 | inline_update_overall_summary. | |
1bbb87c4 | 290 | If callee_removed is non-NULL, set it to true if we removed callee node. |
c170d40f JH |
291 | |
292 | Return true iff any new callgraph edges were discovered as a | |
fee8b6da JH |
293 | result of inlining. */ |
294 | ||
295 | bool | |
296 | inline_call (struct cgraph_edge *e, bool update_original, | |
d52f5295 | 297 | vec<cgraph_edge *> *new_edges, |
1bbb87c4 JH |
298 | int *overall_size, bool update_overall_summary, |
299 | bool *callee_removed) | |
fee8b6da JH |
300 | { |
301 | int old_size = 0, new_size = 0; | |
302 | struct cgraph_node *to = NULL; | |
303 | struct cgraph_edge *curr = e; | |
d52f5295 | 304 | struct cgraph_node *callee = e->callee->ultimate_alias_target (); |
0f378cb5 JH |
305 | bool new_edges_found = false; |
306 | ||
f107227b JH |
307 | /* This is used only for assert bellow. */ |
308 | #if 0 | |
0f378cb5 JH |
309 | int estimated_growth = estimate_edge_growth (e); |
310 | bool predicated = inline_edge_summary (e)->predicate != NULL; | |
311 | #endif | |
fee8b6da | 312 | |
09ce3660 | 313 | speculation_removed = false; |
fee8b6da JH |
314 | /* Don't inline inlined edges. */ |
315 | gcc_assert (e->inline_failed); | |
316 | /* Don't even think of inlining inline clone. */ | |
a5b1779f | 317 | gcc_assert (!callee->global.inlined_to); |
fee8b6da JH |
318 | |
319 | e->inline_failed = CIF_OK; | |
67348ccc | 320 | DECL_POSSIBLY_INLINED (callee->decl) = true; |
fee8b6da | 321 | |
632b4f8e JH |
322 | to = e->caller; |
323 | if (to->global.inlined_to) | |
324 | to = to->global.inlined_to; | |
632b4f8e | 325 | |
5058c037 JH |
326 | if (DECL_FUNCTION_PERSONALITY (callee->decl)) |
327 | DECL_FUNCTION_PERSONALITY (to->decl) | |
328 | = DECL_FUNCTION_PERSONALITY (callee->decl); | |
329 | ||
a5b1779f JH |
330 | /* If aliases are involved, redirect edge to the actual destination and |
331 | possibly remove the aliases. */ | |
332 | if (e->callee != callee) | |
39e2db00 JH |
333 | { |
334 | struct cgraph_node *alias = e->callee, *next_alias; | |
3dafb85c | 335 | e->redirect_callee (callee); |
39e2db00 JH |
336 | while (alias && alias != callee) |
337 | { | |
338 | if (!alias->callers | |
8ccc8042 JH |
339 | && can_remove_node_now_p (alias, |
340 | !e->next_caller && !e->prev_caller ? e : NULL)) | |
39e2db00 | 341 | { |
d52f5295 ML |
342 | next_alias = alias->get_alias_target (); |
343 | alias->remove (); | |
1bbb87c4 JH |
344 | if (callee_removed) |
345 | *callee_removed = true; | |
39e2db00 JH |
346 | alias = next_alias; |
347 | } | |
348 | else | |
349 | break; | |
350 | } | |
351 | } | |
a5b1779f | 352 | |
bd936951 | 353 | clone_inlined_nodes (e, true, update_original, overall_size, e->frequency); |
fee8b6da | 354 | |
fee8b6da | 355 | gcc_assert (curr->callee->global.inlined_to == to); |
898b8927 | 356 | |
9a1e784a | 357 | old_size = inline_summaries->get (to)->size; |
898b8927 | 358 | inline_merge_summary (e); |
4fd94d1e MJ |
359 | if (e->in_polymorphic_cdtor) |
360 | mark_all_inlined_calls_cdtor (e->callee); | |
bb1e543c | 361 | if (opt_for_fn (e->caller->decl, optimize)) |
0f378cb5 | 362 | new_edges_found = ipa_propagate_indirect_call_infos (curr, new_edges); |
c170d40f JH |
363 | if (update_overall_summary) |
364 | inline_update_overall_summary (to); | |
9a1e784a | 365 | new_size = inline_summaries->get (to)->size; |
d250540a | 366 | |
1f26ac87 JM |
367 | if (callee->calls_comdat_local) |
368 | to->calls_comdat_local = true; | |
d52f5295 | 369 | else if (to->calls_comdat_local && callee->comdat_local_p ()) |
1f26ac87 JM |
370 | { |
371 | struct cgraph_edge *se = to->callees; | |
372 | for (; se; se = se->next_callee) | |
d52f5295 | 373 | if (se->inline_failed && se->callee->comdat_local_p ()) |
1f26ac87 JM |
374 | break; |
375 | if (se == NULL) | |
376 | to->calls_comdat_local = false; | |
377 | } | |
378 | ||
f107227b JH |
379 | /* FIXME: This assert suffers from roundoff errors, disable it for GCC 5 |
380 | and revisit it after conversion to sreals in GCC 6. | |
381 | See PR 65654. */ | |
382 | #if 0 | |
0f378cb5 JH |
383 | /* Verify that estimated growth match real growth. Allow off-by-one |
384 | error due to INLINE_SIZE_SCALE roudoff errors. */ | |
48b1474e | 385 | gcc_assert (!update_overall_summary || !overall_size || new_edges_found |
0f378cb5 | 386 | || abs (estimated_growth - (new_size - old_size)) <= 1 |
09ce3660 | 387 | || speculation_removed |
0f378cb5 JH |
388 | /* FIXME: a hack. Edges with false predicate are accounted |
389 | wrong, we should remove them from callgraph. */ | |
390 | || predicated); | |
391 | #endif | |
d250540a | 392 | |
8256d5ca JH |
393 | /* Account the change of overall unit size; external functions will be |
394 | removed and are thus not accounted. */ | |
bb1e543c | 395 | if (overall_size && inline_account_function_p (to)) |
fee8b6da JH |
396 | *overall_size += new_size - old_size; |
397 | ncalls_inlined++; | |
398 | ||
25837a2f JH |
399 | /* This must happen after inline_merge_summary that rely on jump |
400 | functions of callee to not be updated. */ | |
0f378cb5 | 401 | return new_edges_found; |
fee8b6da JH |
402 | } |
403 | ||
404 | ||
405 | /* Copy function body of NODE and redirect all inline clones to it. | |
406 | This is done before inline plan is applied to NODE when there are | |
407 | still some inline clones if it. | |
408 | ||
073a8998 | 409 | This is necessary because inline decisions are not really transitive |
fee8b6da JH |
410 | and the other inline clones may have different bodies. */ |
411 | ||
412 | static struct cgraph_node * | |
413 | save_inline_function_body (struct cgraph_node *node) | |
414 | { | |
415 | struct cgraph_node *first_clone, *n; | |
416 | ||
417 | if (dump_file) | |
418 | fprintf (dump_file, "\nSaving body of %s for later reuse\n", | |
fec39fa6 | 419 | node->name ()); |
fee8b6da | 420 | |
d52f5295 | 421 | gcc_assert (node == cgraph_node::get (node->decl)); |
fee8b6da JH |
422 | |
423 | /* first_clone will be turned into real function. */ | |
424 | first_clone = node->clones; | |
67348ccc | 425 | first_clone->decl = copy_node (node->decl); |
aede2c10 | 426 | first_clone->decl->decl_with_vis.symtab_node = first_clone; |
d52f5295 | 427 | gcc_assert (first_clone == cgraph_node::get (first_clone->decl)); |
fee8b6da JH |
428 | |
429 | /* Now reshape the clone tree, so all other clones descends from | |
430 | first_clone. */ | |
431 | if (first_clone->next_sibling_clone) | |
432 | { | |
433 | for (n = first_clone->next_sibling_clone; n->next_sibling_clone; n = n->next_sibling_clone) | |
434 | n->clone_of = first_clone; | |
435 | n->clone_of = first_clone; | |
436 | n->next_sibling_clone = first_clone->clones; | |
437 | if (first_clone->clones) | |
438 | first_clone->clones->prev_sibling_clone = n; | |
439 | first_clone->clones = first_clone->next_sibling_clone; | |
440 | first_clone->next_sibling_clone->prev_sibling_clone = NULL; | |
441 | first_clone->next_sibling_clone = NULL; | |
442 | gcc_assert (!first_clone->prev_sibling_clone); | |
443 | } | |
444 | first_clone->clone_of = NULL; | |
445 | ||
446 | /* Now node in question has no clones. */ | |
447 | node->clones = NULL; | |
448 | ||
1a3118e9 JH |
449 | /* Inline clones share decl with the function they are cloned |
450 | from. Walk the whole clone tree and redirect them all to the | |
451 | new decl. */ | |
fee8b6da JH |
452 | if (first_clone->clones) |
453 | for (n = first_clone->clones; n != first_clone;) | |
454 | { | |
67348ccc DM |
455 | gcc_assert (n->decl == node->decl); |
456 | n->decl = first_clone->decl; | |
fee8b6da JH |
457 | if (n->clones) |
458 | n = n->clones; | |
459 | else if (n->next_sibling_clone) | |
460 | n = n->next_sibling_clone; | |
461 | else | |
462 | { | |
463 | while (n != first_clone && !n->next_sibling_clone) | |
464 | n = n->clone_of; | |
465 | if (n != first_clone) | |
466 | n = n->next_sibling_clone; | |
467 | } | |
468 | } | |
469 | ||
470 | /* Copy the OLD_VERSION_NODE function tree to the new version. */ | |
67348ccc | 471 | tree_function_versioning (node->decl, first_clone->decl, |
9771b263 DN |
472 | NULL, true, NULL, false, |
473 | NULL, NULL); | |
fee8b6da | 474 | |
1a3118e9 JH |
475 | /* The function will be short lived and removed after we inline all the clones, |
476 | but make it internal so we won't confuse ourself. */ | |
67348ccc | 477 | DECL_EXTERNAL (first_clone->decl) = 0; |
67348ccc DM |
478 | TREE_PUBLIC (first_clone->decl) = 0; |
479 | DECL_COMDAT (first_clone->decl) = 0; | |
9771b263 | 480 | first_clone->ipa_transforms_to_apply.release (); |
fee8b6da | 481 | |
b4e93f45 JH |
482 | /* When doing recursive inlining, the clone may become unnecessary. |
483 | This is possible i.e. in the case when the recursive function is proved to be | |
484 | non-throwing and the recursion happens only in the EH landing pad. | |
485 | We can not remove the clone until we are done with saving the body. | |
486 | Remove it now. */ | |
487 | if (!first_clone->callers) | |
488 | { | |
d52f5295 | 489 | first_clone->remove_symbol_and_inline_clones (); |
b4e93f45 JH |
490 | first_clone = NULL; |
491 | } | |
fee8b6da | 492 | #ifdef ENABLE_CHECKING |
b4e93f45 | 493 | else |
d52f5295 | 494 | first_clone->verify (); |
fee8b6da JH |
495 | #endif |
496 | return first_clone; | |
497 | } | |
498 | ||
9c8305f8 JH |
499 | /* Return true when function body of DECL still needs to be kept around |
500 | for later re-use. */ | |
65d630d4 | 501 | static bool |
9c8305f8 JH |
502 | preserve_function_body_p (struct cgraph_node *node) |
503 | { | |
3dafb85c | 504 | gcc_assert (symtab->global_info_ready); |
67348ccc | 505 | gcc_assert (!node->alias && !node->thunk.thunk_p); |
9c8305f8 JH |
506 | |
507 | /* Look if there is any clone around. */ | |
508 | if (node->clones) | |
509 | return true; | |
510 | return false; | |
511 | } | |
fee8b6da JH |
512 | |
513 | /* Apply inline plan to function. */ | |
514 | ||
515 | unsigned int | |
516 | inline_transform (struct cgraph_node *node) | |
517 | { | |
518 | unsigned int todo = 0; | |
e8aec975 | 519 | struct cgraph_edge *e, *next; |
2bf86c84 | 520 | bool has_inline = false; |
c9fc06dc | 521 | |
fee8b6da JH |
522 | /* FIXME: Currently the pass manager is adding inline transform more than |
523 | once to some clones. This needs revisiting after WPA cleanups. */ | |
524 | if (cfun->after_inlining) | |
525 | return 0; | |
526 | ||
527 | /* We might need the body of this function so that we can expand | |
528 | it inline somewhere else. */ | |
9c8305f8 | 529 | if (preserve_function_body_p (node)) |
fee8b6da JH |
530 | save_inline_function_body (node); |
531 | ||
e8aec975 JH |
532 | for (e = node->callees; e; e = next) |
533 | { | |
2bf86c84 JH |
534 | if (!e->inline_failed) |
535 | has_inline = true; | |
e8aec975 | 536 | next = e->next_callee; |
3dafb85c | 537 | e->redirect_call_stmt_to_callee (); |
e8aec975 | 538 | } |
d122681a | 539 | node->remove_all_references (); |
c9fc06dc CB |
540 | |
541 | timevar_push (TV_INTEGRATION); | |
bb1e543c | 542 | if (node->callees && (opt_for_fn (node->decl, optimize) || has_inline)) |
55f01229 | 543 | todo = optimize_inline_calls (current_function_decl); |
c9fc06dc CB |
544 | timevar_pop (TV_INTEGRATION); |
545 | ||
f8698b37 RG |
546 | cfun->always_inline_functions_inlined = true; |
547 | cfun->after_inlining = true; | |
548 | todo |= execute_fixup_cfg (); | |
549 | ||
55f01229 RG |
550 | if (!(todo & TODO_update_ssa_any)) |
551 | /* Redirecting edges might lead to a need for vops to be recomputed. */ | |
552 | todo |= TODO_update_ssa_only_virtuals; | |
553 | ||
f8698b37 | 554 | return todo; |
fee8b6da | 555 | } |