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564fe867 | 1 | /* Callgraph clones |
5624e564 | 2 | Copyright (C) 2003-2015 Free Software Foundation, Inc. |
564fe867 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 | /* This module provide facilities for clonning functions. I.e. creating | |
22 | new functions based on existing functions with simple modifications, | |
23 | such as replacement of parameters. | |
24 | ||
25 | To allow whole program optimization without actual presence of function | |
26 | bodies, an additional infrastructure is provided for so-called virtual | |
27 | clones | |
28 | ||
29 | A virtual clone in the callgraph is a function that has no | |
30 | associated body, just a description of how to create its body based | |
31 | on a different function (which itself may be a virtual clone). | |
32 | ||
33 | The description of function modifications includes adjustments to | |
34 | the function's signature (which allows, for example, removing or | |
35 | adding function arguments), substitutions to perform on the | |
36 | function body, and, for inlined functions, a pointer to the | |
37 | function that it will be inlined into. | |
38 | ||
39 | It is also possible to redirect any edge of the callgraph from a | |
40 | function to its virtual clone. This implies updating of the call | |
41 | site to adjust for the new function signature. | |
42 | ||
43 | Most of the transformations performed by inter-procedural | |
44 | optimizations can be represented via virtual clones. For | |
45 | instance, a constant propagation pass can produce a virtual clone | |
46 | of the function which replaces one of its arguments by a | |
47 | constant. The inliner can represent its decisions by producing a | |
48 | clone of a function whose body will be later integrated into | |
49 | a given function. | |
50 | ||
51 | Using virtual clones, the program can be easily updated | |
52 | during the Execute stage, solving most of pass interactions | |
53 | problems that would otherwise occur during Transform. | |
54 | ||
55 | Virtual clones are later materialized in the LTRANS stage and | |
56 | turned into real functions. Passes executed after the virtual | |
57 | clone were introduced also perform their Transform stage | |
58 | on new functions, so for a pass there is no significant | |
59 | difference between operating on a real function or a virtual | |
60 | clone introduced before its Execute stage. | |
61 | ||
62 | Optimization passes then work on virtual clones introduced before | |
63 | their Execute stage as if they were real functions. The | |
64 | only difference is that clones are not visible during the | |
65 | Generate Summary stage. */ | |
66 | ||
67 | #include "config.h" | |
68 | #include "system.h" | |
69 | #include "coretypes.h" | |
c7131fb2 AM |
70 | #include "backend.h" |
71 | #include "tree.h" | |
72 | #include "gimple.h" | |
d8a2d370 | 73 | #include "rtl.h" |
40e23961 | 74 | #include "alias.h" |
40e23961 MC |
75 | #include "fold-const.h" |
76 | #include "stringpool.h" | |
d8a2d370 | 77 | #include "emit-rtl.h" |
2fb9a547 AM |
78 | #include "internal-fn.h" |
79 | #include "tree-eh.h" | |
442b4905 | 80 | #include "tree-cfg.h" |
564fe867 JH |
81 | #include "tree-inline.h" |
82 | #include "langhooks.h" | |
564fe867 JH |
83 | #include "toplev.h" |
84 | #include "flags.h" | |
564fe867 JH |
85 | #include "debug.h" |
86 | #include "target.h" | |
564fe867 | 87 | #include "diagnostic.h" |
564fe867 | 88 | #include "params.h" |
564fe867 | 89 | #include "intl.h" |
c582198b AM |
90 | #include "cgraph.h" |
91 | #include "alloc-pool.h" | |
dd912cb8 | 92 | #include "symbol-summary.h" |
564fe867 | 93 | #include "ipa-prop.h" |
564fe867 | 94 | #include "tree-iterator.h" |
564fe867 JH |
95 | #include "tree-dump.h" |
96 | #include "gimple-pretty-print.h" | |
564fe867 | 97 | #include "coverage.h" |
564fe867 JH |
98 | #include "ipa-inline.h" |
99 | #include "ipa-utils.h" | |
100 | #include "lto-streamer.h" | |
101 | #include "except.h" | |
102 | ||
3dafb85c ML |
103 | /* Create clone of edge in the node N represented by CALL_EXPR |
104 | the callgraph. */ | |
105 | ||
106 | cgraph_edge * | |
538dd0b7 | 107 | cgraph_edge::clone (cgraph_node *n, gcall *call_stmt, unsigned stmt_uid, |
3dafb85c | 108 | gcov_type count_scale, int freq_scale, bool update_original) |
564fe867 | 109 | { |
3dafb85c ML |
110 | cgraph_edge *new_edge; |
111 | gcov_type gcov_count = apply_probability (count, count_scale); | |
564fe867 JH |
112 | gcov_type freq; |
113 | ||
114 | /* We do not want to ignore loop nest after frequency drops to 0. */ | |
115 | if (!freq_scale) | |
116 | freq_scale = 1; | |
3dafb85c | 117 | freq = frequency * (gcov_type) freq_scale / CGRAPH_FREQ_BASE; |
564fe867 JH |
118 | if (freq > CGRAPH_FREQ_MAX) |
119 | freq = CGRAPH_FREQ_MAX; | |
120 | ||
3dafb85c | 121 | if (indirect_unknown_callee) |
564fe867 JH |
122 | { |
123 | tree decl; | |
124 | ||
e57872ee JH |
125 | if (call_stmt && (decl = gimple_call_fndecl (call_stmt)) |
126 | /* When the call is speculative, we need to resolve it | |
127 | via cgraph_resolve_speculation and not here. */ | |
3dafb85c | 128 | && !speculative) |
564fe867 | 129 | { |
3dafb85c | 130 | cgraph_node *callee = cgraph_node::get (decl); |
564fe867 | 131 | gcc_checking_assert (callee); |
3dafb85c | 132 | new_edge = n->create_edge (callee, call_stmt, gcov_count, freq); |
564fe867 JH |
133 | } |
134 | else | |
135 | { | |
d52f5295 | 136 | new_edge = n->create_indirect_edge (call_stmt, |
3dafb85c | 137 | indirect_info->ecf_flags, |
d34af022 | 138 | count, freq, false); |
3dafb85c | 139 | *new_edge->indirect_info = *indirect_info; |
564fe867 JH |
140 | } |
141 | } | |
142 | else | |
143 | { | |
3dafb85c ML |
144 | new_edge = n->create_edge (callee, call_stmt, gcov_count, freq); |
145 | if (indirect_info) | |
564fe867 JH |
146 | { |
147 | new_edge->indirect_info | |
766090c2 | 148 | = ggc_cleared_alloc<cgraph_indirect_call_info> (); |
3dafb85c | 149 | *new_edge->indirect_info = *indirect_info; |
564fe867 JH |
150 | } |
151 | } | |
152 | ||
3dafb85c ML |
153 | new_edge->inline_failed = inline_failed; |
154 | new_edge->indirect_inlining_edge = indirect_inlining_edge; | |
564fe867 JH |
155 | new_edge->lto_stmt_uid = stmt_uid; |
156 | /* Clone flags that depend on call_stmt availability manually. */ | |
3dafb85c ML |
157 | new_edge->can_throw_external = can_throw_external; |
158 | new_edge->call_stmt_cannot_inline_p = call_stmt_cannot_inline_p; | |
159 | new_edge->speculative = speculative; | |
f9bb202b | 160 | new_edge->in_polymorphic_cdtor = in_polymorphic_cdtor; |
564fe867 JH |
161 | if (update_original) |
162 | { | |
3dafb85c ML |
163 | count -= new_edge->count; |
164 | if (count < 0) | |
165 | count = 0; | |
564fe867 | 166 | } |
3dafb85c | 167 | symtab->call_edge_duplication_hooks (this, new_edge); |
564fe867 JH |
168 | return new_edge; |
169 | } | |
170 | ||
610c8ef0 MJ |
171 | /* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP and the |
172 | return value if SKIP_RETURN is true. */ | |
173 | ||
174 | static tree | |
175 | build_function_type_skip_args (tree orig_type, bitmap args_to_skip, | |
176 | bool skip_return) | |
177 | { | |
178 | tree new_type = NULL; | |
5ae5a238 | 179 | tree args, new_args = NULL; |
610c8ef0 MJ |
180 | tree new_reversed; |
181 | int i = 0; | |
182 | ||
183 | for (args = TYPE_ARG_TYPES (orig_type); args && args != void_list_node; | |
184 | args = TREE_CHAIN (args), i++) | |
185 | if (!args_to_skip || !bitmap_bit_p (args_to_skip, i)) | |
186 | new_args = tree_cons (NULL_TREE, TREE_VALUE (args), new_args); | |
187 | ||
188 | new_reversed = nreverse (new_args); | |
189 | if (args) | |
190 | { | |
191 | if (new_reversed) | |
192 | TREE_CHAIN (new_args) = void_list_node; | |
193 | else | |
194 | new_reversed = void_list_node; | |
195 | } | |
196 | ||
197 | /* Use copy_node to preserve as much as possible from original type | |
198 | (debug info, attribute lists etc.) | |
199 | Exception is METHOD_TYPEs must have THIS argument. | |
200 | When we are asked to remove it, we need to build new FUNCTION_TYPE | |
201 | instead. */ | |
202 | if (TREE_CODE (orig_type) != METHOD_TYPE | |
203 | || !args_to_skip | |
204 | || !bitmap_bit_p (args_to_skip, 0)) | |
205 | { | |
206 | new_type = build_distinct_type_copy (orig_type); | |
207 | TYPE_ARG_TYPES (new_type) = new_reversed; | |
208 | } | |
209 | else | |
210 | { | |
211 | new_type | |
212 | = build_distinct_type_copy (build_function_type (TREE_TYPE (orig_type), | |
213 | new_reversed)); | |
214 | TYPE_CONTEXT (new_type) = TYPE_CONTEXT (orig_type); | |
215 | } | |
216 | ||
217 | if (skip_return) | |
218 | TREE_TYPE (new_type) = void_type_node; | |
219 | ||
610c8ef0 MJ |
220 | return new_type; |
221 | } | |
222 | ||
223 | /* Build variant of function decl ORIG_DECL skipping ARGS_TO_SKIP and the | |
224 | return value if SKIP_RETURN is true. | |
225 | ||
226 | Arguments from DECL_ARGUMENTS list can't be removed now, since they are | |
227 | linked by TREE_CHAIN directly. The caller is responsible for eliminating | |
228 | them when they are being duplicated (i.e. copy_arguments_for_versioning). */ | |
229 | ||
230 | static tree | |
231 | build_function_decl_skip_args (tree orig_decl, bitmap args_to_skip, | |
232 | bool skip_return) | |
233 | { | |
234 | tree new_decl = copy_node (orig_decl); | |
235 | tree new_type; | |
236 | ||
237 | new_type = TREE_TYPE (orig_decl); | |
238 | if (prototype_p (new_type) | |
239 | || (skip_return && !VOID_TYPE_P (TREE_TYPE (new_type)))) | |
240 | new_type | |
241 | = build_function_type_skip_args (new_type, args_to_skip, skip_return); | |
242 | TREE_TYPE (new_decl) = new_type; | |
243 | ||
244 | /* For declarations setting DECL_VINDEX (i.e. methods) | |
245 | we expect first argument to be THIS pointer. */ | |
246 | if (args_to_skip && bitmap_bit_p (args_to_skip, 0)) | |
247 | DECL_VINDEX (new_decl) = NULL_TREE; | |
248 | ||
249 | /* When signature changes, we need to clear builtin info. */ | |
250 | if (DECL_BUILT_IN (new_decl) | |
251 | && args_to_skip | |
252 | && !bitmap_empty_p (args_to_skip)) | |
253 | { | |
254 | DECL_BUILT_IN_CLASS (new_decl) = NOT_BUILT_IN; | |
255 | DECL_FUNCTION_CODE (new_decl) = (enum built_in_function) 0; | |
256 | } | |
257 | /* The FE might have information and assumptions about the other | |
258 | arguments. */ | |
259 | DECL_LANG_SPECIFIC (new_decl) = NULL; | |
260 | return new_decl; | |
261 | } | |
262 | ||
263 | /* Set flags of NEW_NODE and its decl. NEW_NODE is a newly created private | |
264 | clone or its thunk. */ | |
265 | ||
266 | static void | |
267 | set_new_clone_decl_and_node_flags (cgraph_node *new_node) | |
268 | { | |
269 | DECL_EXTERNAL (new_node->decl) = 0; | |
610c8ef0 MJ |
270 | TREE_PUBLIC (new_node->decl) = 0; |
271 | DECL_COMDAT (new_node->decl) = 0; | |
272 | DECL_WEAK (new_node->decl) = 0; | |
273 | DECL_VIRTUAL_P (new_node->decl) = 0; | |
274 | DECL_STATIC_CONSTRUCTOR (new_node->decl) = 0; | |
275 | DECL_STATIC_DESTRUCTOR (new_node->decl) = 0; | |
276 | ||
277 | new_node->externally_visible = 0; | |
278 | new_node->local.local = 1; | |
279 | new_node->lowered = true; | |
280 | } | |
281 | ||
282 | /* Duplicate thunk THUNK if necessary but make it to refer to NODE. | |
283 | ARGS_TO_SKIP, if non-NULL, determines which parameters should be omitted. | |
284 | Function can return NODE if no thunk is necessary, which can happen when | |
285 | thunk is this_adjusting but we are removing this parameter. */ | |
286 | ||
287 | static cgraph_node * | |
d284e1b8 | 288 | duplicate_thunk_for_node (cgraph_node *thunk, cgraph_node *node) |
610c8ef0 MJ |
289 | { |
290 | cgraph_node *new_thunk, *thunk_of; | |
d52f5295 | 291 | thunk_of = thunk->callees->callee->ultimate_alias_target (); |
610c8ef0 MJ |
292 | |
293 | if (thunk_of->thunk.thunk_p) | |
d284e1b8 | 294 | node = duplicate_thunk_for_node (thunk_of, node); |
610c8ef0 | 295 | |
48fb6d40 | 296 | if (!DECL_ARGUMENTS (thunk->decl)) |
70486010 | 297 | thunk->get_untransformed_body (); |
48fb6d40 | 298 | |
3dafb85c | 299 | cgraph_edge *cs; |
610c8ef0 MJ |
300 | for (cs = node->callers; cs; cs = cs->next_caller) |
301 | if (cs->caller->thunk.thunk_p | |
302 | && cs->caller->thunk.this_adjusting == thunk->thunk.this_adjusting | |
303 | && cs->caller->thunk.fixed_offset == thunk->thunk.fixed_offset | |
304 | && cs->caller->thunk.virtual_offset_p == thunk->thunk.virtual_offset_p | |
305 | && cs->caller->thunk.virtual_value == thunk->thunk.virtual_value) | |
306 | return cs->caller; | |
307 | ||
308 | tree new_decl; | |
d284e1b8 | 309 | if (!node->clone.args_to_skip) |
610c8ef0 MJ |
310 | new_decl = copy_node (thunk->decl); |
311 | else | |
312 | { | |
313 | /* We do not need to duplicate this_adjusting thunks if we have removed | |
314 | this. */ | |
315 | if (thunk->thunk.this_adjusting | |
d284e1b8 | 316 | && bitmap_bit_p (node->clone.args_to_skip, 0)) |
610c8ef0 MJ |
317 | return node; |
318 | ||
d284e1b8 MJ |
319 | new_decl = build_function_decl_skip_args (thunk->decl, |
320 | node->clone.args_to_skip, | |
610c8ef0 MJ |
321 | false); |
322 | } | |
bec63208 MJ |
323 | |
324 | tree *link = &DECL_ARGUMENTS (new_decl); | |
325 | int i = 0; | |
326 | for (tree pd = DECL_ARGUMENTS (thunk->decl); pd; pd = DECL_CHAIN (pd), i++) | |
327 | { | |
328 | if (!node->clone.args_to_skip | |
329 | || !bitmap_bit_p (node->clone.args_to_skip, i)) | |
330 | { | |
331 | tree nd = copy_node (pd); | |
332 | DECL_CONTEXT (nd) = new_decl; | |
333 | *link = nd; | |
334 | link = &DECL_CHAIN (nd); | |
335 | } | |
336 | } | |
337 | *link = NULL_TREE; | |
338 | ||
610c8ef0 MJ |
339 | gcc_checking_assert (!DECL_STRUCT_FUNCTION (new_decl)); |
340 | gcc_checking_assert (!DECL_INITIAL (new_decl)); | |
341 | gcc_checking_assert (!DECL_RESULT (new_decl)); | |
342 | gcc_checking_assert (!DECL_RTL_SET_P (new_decl)); | |
343 | ||
344 | DECL_NAME (new_decl) = clone_function_name (thunk->decl, "artificial_thunk"); | |
345 | SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl)); | |
610c8ef0 | 346 | |
d52f5295 | 347 | new_thunk = cgraph_node::create (new_decl); |
610c8ef0 MJ |
348 | set_new_clone_decl_and_node_flags (new_thunk); |
349 | new_thunk->definition = true; | |
350 | new_thunk->thunk = thunk->thunk; | |
351 | new_thunk->unique_name = in_lto_p; | |
352 | new_thunk->former_clone_of = thunk->decl; | |
d284e1b8 MJ |
353 | new_thunk->clone.args_to_skip = node->clone.args_to_skip; |
354 | new_thunk->clone.combined_args_to_skip = node->clone.combined_args_to_skip; | |
610c8ef0 | 355 | |
3dafb85c | 356 | cgraph_edge *e = new_thunk->create_edge (node, NULL, 0, |
d52f5295 | 357 | CGRAPH_FREQ_BASE); |
610c8ef0 | 358 | e->call_stmt_cannot_inline_p = true; |
3dafb85c | 359 | symtab->call_edge_duplication_hooks (thunk->callees, e); |
3dafb85c | 360 | symtab->call_cgraph_duplication_hooks (thunk, new_thunk); |
610c8ef0 MJ |
361 | return new_thunk; |
362 | } | |
363 | ||
364 | /* If E does not lead to a thunk, simply redirect it to N. Otherwise create | |
365 | one or more equivalent thunks for N and redirect E to the first in the | |
6a4bad95 MJ |
366 | chain. Note that it is then necessary to call |
367 | n->expand_all_artificial_thunks once all callers are redirected. */ | |
610c8ef0 MJ |
368 | |
369 | void | |
6a4bad95 | 370 | cgraph_edge::redirect_callee_duplicating_thunks (cgraph_node *n) |
610c8ef0 | 371 | { |
6a4bad95 | 372 | cgraph_node *orig_to = callee->ultimate_alias_target (); |
610c8ef0 | 373 | if (orig_to->thunk.thunk_p) |
d284e1b8 | 374 | n = duplicate_thunk_for_node (orig_to, n); |
610c8ef0 | 375 | |
6a4bad95 MJ |
376 | redirect_callee (n); |
377 | } | |
378 | ||
379 | /* Call expand_thunk on all callers that are thunks and if analyze those nodes | |
380 | that were expanded. */ | |
381 | ||
382 | void | |
383 | cgraph_node::expand_all_artificial_thunks () | |
384 | { | |
385 | cgraph_edge *e; | |
386 | for (e = callers; e;) | |
387 | if (e->caller->thunk.thunk_p) | |
388 | { | |
389 | cgraph_node *thunk = e->caller; | |
390 | ||
391 | e = e->next_caller; | |
392 | if (thunk->expand_thunk (false, false)) | |
393 | { | |
394 | thunk->thunk.thunk_p = false; | |
395 | thunk->analyze (); | |
396 | } | |
397 | thunk->expand_all_artificial_thunks (); | |
398 | } | |
399 | else | |
400 | e = e->next_caller; | |
610c8ef0 | 401 | } |
564fe867 JH |
402 | |
403 | /* Create node representing clone of N executed COUNT times. Decrease | |
404 | the execution counts from original node too. | |
405 | The new clone will have decl set to DECL that may or may not be the same | |
406 | as decl of N. | |
407 | ||
408 | When UPDATE_ORIGINAL is true, the counts are subtracted from the original | |
409 | function's profile to reflect the fact that part of execution is handled | |
410 | by node. | |
411 | When CALL_DUPLICATOIN_HOOK is true, the ipa passes are acknowledged about | |
44a60244 MJ |
412 | the new clone. Otherwise the caller is responsible for doing so later. |
413 | ||
414 | If the new node is being inlined into another one, NEW_INLINED_TO should be | |
415 | the outline function the new one is (even indirectly) inlined to. All hooks | |
416 | will see this in node's global.inlined_to, when invoked. Can be NULL if the | |
417 | node is not inlined. */ | |
564fe867 | 418 | |
d52f5295 | 419 | cgraph_node * |
ed6ef490 | 420 | cgraph_node::create_clone (tree new_decl, gcov_type gcov_count, int freq, |
d52f5295 ML |
421 | bool update_original, |
422 | vec<cgraph_edge *> redirect_callers, | |
423 | bool call_duplication_hook, | |
3dafb85c | 424 | cgraph_node *new_inlined_to, |
d52f5295 | 425 | bitmap args_to_skip) |
564fe867 | 426 | { |
3dafb85c ML |
427 | cgraph_node *new_node = symtab->create_empty (); |
428 | cgraph_edge *e; | |
564fe867 JH |
429 | gcov_type count_scale; |
430 | unsigned i; | |
431 | ||
ed6ef490 | 432 | new_node->decl = new_decl; |
d52f5295 ML |
433 | new_node->register_symbol (); |
434 | new_node->origin = origin; | |
435 | new_node->lto_file_data = lto_file_data; | |
564fe867 JH |
436 | if (new_node->origin) |
437 | { | |
438 | new_node->next_nested = new_node->origin->nested; | |
439 | new_node->origin->nested = new_node; | |
440 | } | |
d52f5295 ML |
441 | new_node->analyzed = analyzed; |
442 | new_node->definition = definition; | |
443 | new_node->local = local; | |
67348ccc | 444 | new_node->externally_visible = false; |
7861b648 | 445 | new_node->no_reorder = no_reorder; |
564fe867 | 446 | new_node->local.local = true; |
d52f5295 | 447 | new_node->global = global; |
44a60244 | 448 | new_node->global.inlined_to = new_inlined_to; |
d52f5295 | 449 | new_node->rtl = rtl; |
564fe867 | 450 | new_node->count = count; |
d52f5295 ML |
451 | new_node->frequency = frequency; |
452 | new_node->tp_first_run = tp_first_run; | |
9d6171dc | 453 | new_node->tm_clone = tm_clone; |
0a7246ee JH |
454 | new_node->icf_merged = icf_merged; |
455 | new_node->merged = merged; | |
d284e1b8 MJ |
456 | |
457 | new_node->clone.tree_map = NULL; | |
458 | new_node->clone.args_to_skip = args_to_skip; | |
ed6ef490 | 459 | new_node->split_part = split_part; |
d284e1b8 | 460 | if (!args_to_skip) |
d52f5295 ML |
461 | new_node->clone.combined_args_to_skip = clone.combined_args_to_skip; |
462 | else if (clone.combined_args_to_skip) | |
d284e1b8 MJ |
463 | { |
464 | new_node->clone.combined_args_to_skip = BITMAP_GGC_ALLOC (); | |
465 | bitmap_ior (new_node->clone.combined_args_to_skip, | |
d52f5295 | 466 | clone.combined_args_to_skip, args_to_skip); |
d284e1b8 MJ |
467 | } |
468 | else | |
469 | new_node->clone.combined_args_to_skip = args_to_skip; | |
470 | ||
d52f5295 | 471 | if (count) |
564fe867 | 472 | { |
d52f5295 | 473 | if (new_node->count > count) |
564fe867 JH |
474 | count_scale = REG_BR_PROB_BASE; |
475 | else | |
d52f5295 | 476 | count_scale = GCOV_COMPUTE_SCALE (new_node->count, count); |
564fe867 JH |
477 | } |
478 | else | |
479 | count_scale = 0; | |
480 | if (update_original) | |
481 | { | |
d52f5295 ML |
482 | count -= gcov_count; |
483 | if (count < 0) | |
484 | count = 0; | |
564fe867 JH |
485 | } |
486 | ||
9771b263 | 487 | FOR_EACH_VEC_ELT (redirect_callers, i, e) |
564fe867 JH |
488 | { |
489 | /* Redirect calls to the old version node to point to its new | |
9de6f6c3 JH |
490 | version. The only exception is when the edge was proved to |
491 | be unreachable during the clonning procedure. */ | |
492 | if (!e->callee | |
493 | || DECL_BUILT_IN_CLASS (e->callee->decl) != BUILT_IN_NORMAL | |
494 | || DECL_FUNCTION_CODE (e->callee->decl) != BUILT_IN_UNREACHABLE) | |
6a4bad95 | 495 | e->redirect_callee_duplicating_thunks (new_node); |
564fe867 | 496 | } |
6a4bad95 | 497 | new_node->expand_all_artificial_thunks (); |
564fe867 | 498 | |
d52f5295 | 499 | for (e = callees;e; e=e->next_callee) |
3dafb85c ML |
500 | e->clone (new_node, e->call_stmt, e->lto_stmt_uid, count_scale, |
501 | freq, update_original); | |
564fe867 | 502 | |
d52f5295 | 503 | for (e = indirect_calls; e; e = e->next_callee) |
3dafb85c ML |
504 | e->clone (new_node, e->call_stmt, e->lto_stmt_uid, |
505 | count_scale, freq, update_original); | |
d52f5295 | 506 | new_node->clone_references (this); |
564fe867 | 507 | |
d52f5295 ML |
508 | new_node->next_sibling_clone = clones; |
509 | if (clones) | |
510 | clones->prev_sibling_clone = new_node; | |
511 | clones = new_node; | |
512 | new_node->clone_of = this; | |
564fe867 JH |
513 | |
514 | if (call_duplication_hook) | |
3dafb85c | 515 | symtab->call_cgraph_duplication_hooks (this, new_node); |
564fe867 JH |
516 | return new_node; |
517 | } | |
518 | ||
564fe867 JH |
519 | static GTY(()) unsigned int clone_fn_id_num; |
520 | ||
9816367c BS |
521 | /* Return a new assembler name for a clone with SUFFIX of a decl named |
522 | NAME. */ | |
523 | ||
564fe867 | 524 | tree |
9816367c | 525 | clone_function_name_1 (const char *name, const char *suffix) |
564fe867 | 526 | { |
9816367c | 527 | size_t len = strlen (name); |
564fe867 JH |
528 | char *tmp_name, *prefix; |
529 | ||
530 | prefix = XALLOCAVEC (char, len + strlen (suffix) + 2); | |
9816367c | 531 | memcpy (prefix, name, len); |
564fe867 JH |
532 | strcpy (prefix + len + 1, suffix); |
533 | #ifndef NO_DOT_IN_LABEL | |
534 | prefix[len] = '.'; | |
535 | #elif !defined NO_DOLLAR_IN_LABEL | |
536 | prefix[len] = '$'; | |
537 | #else | |
538 | prefix[len] = '_'; | |
539 | #endif | |
540 | ASM_FORMAT_PRIVATE_NAME (tmp_name, prefix, clone_fn_id_num++); | |
541 | return get_identifier (tmp_name); | |
542 | } | |
543 | ||
9816367c BS |
544 | /* Return a new assembler name for a clone of DECL with SUFFIX. */ |
545 | ||
546 | tree | |
547 | clone_function_name (tree decl, const char *suffix) | |
548 | { | |
549 | tree name = DECL_ASSEMBLER_NAME (decl); | |
550 | return clone_function_name_1 (IDENTIFIER_POINTER (name), suffix); | |
551 | } | |
552 | ||
553 | ||
564fe867 JH |
554 | /* Create callgraph node clone with new declaration. The actual body will |
555 | be copied later at compilation stage. | |
556 | ||
557 | TODO: after merging in ipa-sra use function call notes instead of args_to_skip | |
558 | bitmap interface. | |
559 | */ | |
3dafb85c | 560 | cgraph_node * |
d52f5295 ML |
561 | cgraph_node::create_virtual_clone (vec<cgraph_edge *> redirect_callers, |
562 | vec<ipa_replace_map *, va_gc> *tree_map, | |
563 | bitmap args_to_skip, const char * suffix) | |
564fe867 | 564 | { |
d52f5295 | 565 | tree old_decl = decl; |
3dafb85c | 566 | cgraph_node *new_node = NULL; |
564fe867 | 567 | tree new_decl; |
440a5082 | 568 | size_t len, i; |
3dafb85c | 569 | ipa_replace_map *map; |
440a5082 | 570 | char *name; |
564fe867 | 571 | |
a2e2a668 | 572 | if (!in_lto_p) |
ed89033d | 573 | gcc_checking_assert (tree_versionable_function_p (old_decl)); |
564fe867 | 574 | |
d52f5295 | 575 | gcc_assert (local.can_change_signature || !args_to_skip); |
564fe867 JH |
576 | |
577 | /* Make a new FUNCTION_DECL tree node */ | |
578 | if (!args_to_skip) | |
579 | new_decl = copy_node (old_decl); | |
580 | else | |
581 | new_decl = build_function_decl_skip_args (old_decl, args_to_skip, false); | |
49bde175 JH |
582 | |
583 | /* These pointers represent function body and will be populated only when clone | |
584 | is materialized. */ | |
585 | gcc_assert (new_decl != old_decl); | |
564fe867 | 586 | DECL_STRUCT_FUNCTION (new_decl) = NULL; |
49bde175 JH |
587 | DECL_ARGUMENTS (new_decl) = NULL; |
588 | DECL_INITIAL (new_decl) = NULL; | |
589 | DECL_RESULT (new_decl) = NULL; | |
590 | /* We can not do DECL_RESULT (new_decl) = NULL; here because of LTO partitioning | |
591 | sometimes storing only clone decl instead of original. */ | |
564fe867 JH |
592 | |
593 | /* Generate a new name for the new version. */ | |
440a5082 EB |
594 | len = IDENTIFIER_LENGTH (DECL_NAME (old_decl)); |
595 | name = XALLOCAVEC (char, len + strlen (suffix) + 2); | |
596 | memcpy (name, IDENTIFIER_POINTER (DECL_NAME (old_decl)), len); | |
597 | strcpy (name + len + 1, suffix); | |
598 | name[len] = '.'; | |
599 | DECL_NAME (new_decl) = get_identifier (name); | |
600 | SET_DECL_ASSEMBLER_NAME (new_decl, clone_function_name (old_decl, suffix)); | |
564fe867 JH |
601 | SET_DECL_RTL (new_decl, NULL); |
602 | ||
d52f5295 ML |
603 | new_node = create_clone (new_decl, count, CGRAPH_FREQ_BASE, false, |
604 | redirect_callers, false, NULL, args_to_skip); | |
605 | ||
564fe867 JH |
606 | /* Update the properties. |
607 | Make clone visible only within this translation unit. Make sure | |
608 | that is not weak also. | |
609 | ??? We cannot use COMDAT linkage because there is no | |
610 | ABI support for this. */ | |
610c8ef0 | 611 | set_new_clone_decl_and_node_flags (new_node); |
564fe867 | 612 | new_node->clone.tree_map = tree_map; |
4ab26ee0 | 613 | if (!implicit_section) |
ed89033d | 614 | new_node->set_section (get_section ()); |
702d8703 JH |
615 | |
616 | /* Clones of global symbols or symbols with unique names are unique. */ | |
617 | if ((TREE_PUBLIC (old_decl) | |
618 | && !DECL_EXTERNAL (old_decl) | |
619 | && !DECL_WEAK (old_decl) | |
620 | && !DECL_COMDAT (old_decl)) | |
621 | || in_lto_p) | |
67348ccc | 622 | new_node->unique_name = true; |
9771b263 | 623 | FOR_EACH_VEC_SAFE_ELT (tree_map, i, map) |
3dafb85c | 624 | new_node->maybe_create_reference (map->new_tree, IPA_REF_ADDR, NULL); |
d284e1b8 | 625 | |
d52f5295 | 626 | if (ipa_transforms_to_apply.exists ()) |
ca860d03 | 627 | new_node->ipa_transforms_to_apply |
d52f5295 | 628 | = ipa_transforms_to_apply.copy (); |
564fe867 | 629 | |
3dafb85c | 630 | symtab->call_cgraph_duplication_hooks (this, new_node); |
564fe867 JH |
631 | |
632 | return new_node; | |
633 | } | |
634 | ||
d52f5295 ML |
635 | /* callgraph node being removed from symbol table; see if its entry can be |
636 | replaced by other inline clone. */ | |
637 | cgraph_node * | |
638 | cgraph_node::find_replacement (void) | |
564fe867 | 639 | { |
3dafb85c | 640 | cgraph_node *next_inline_clone, *replacement; |
564fe867 | 641 | |
d52f5295 | 642 | for (next_inline_clone = clones; |
564fe867 | 643 | next_inline_clone |
d52f5295 | 644 | && next_inline_clone->decl != decl; |
564fe867 JH |
645 | next_inline_clone = next_inline_clone->next_sibling_clone) |
646 | ; | |
647 | ||
648 | /* If there is inline clone of the node being removed, we need | |
649 | to put it into the position of removed node and reorganize all | |
650 | other clones to be based on it. */ | |
651 | if (next_inline_clone) | |
652 | { | |
3dafb85c ML |
653 | cgraph_node *n; |
654 | cgraph_node *new_clones; | |
564fe867 JH |
655 | |
656 | replacement = next_inline_clone; | |
657 | ||
658 | /* Unlink inline clone from the list of clones of removed node. */ | |
659 | if (next_inline_clone->next_sibling_clone) | |
660 | next_inline_clone->next_sibling_clone->prev_sibling_clone | |
661 | = next_inline_clone->prev_sibling_clone; | |
662 | if (next_inline_clone->prev_sibling_clone) | |
663 | { | |
d52f5295 | 664 | gcc_assert (clones != next_inline_clone); |
564fe867 JH |
665 | next_inline_clone->prev_sibling_clone->next_sibling_clone |
666 | = next_inline_clone->next_sibling_clone; | |
667 | } | |
668 | else | |
669 | { | |
d52f5295 ML |
670 | gcc_assert (clones == next_inline_clone); |
671 | clones = next_inline_clone->next_sibling_clone; | |
564fe867 JH |
672 | } |
673 | ||
d52f5295 ML |
674 | new_clones = clones; |
675 | clones = NULL; | |
564fe867 JH |
676 | |
677 | /* Copy clone info. */ | |
d52f5295 | 678 | next_inline_clone->clone = clone; |
564fe867 JH |
679 | |
680 | /* Now place it into clone tree at same level at NODE. */ | |
d52f5295 | 681 | next_inline_clone->clone_of = clone_of; |
564fe867 JH |
682 | next_inline_clone->prev_sibling_clone = NULL; |
683 | next_inline_clone->next_sibling_clone = NULL; | |
d52f5295 | 684 | if (clone_of) |
564fe867 | 685 | { |
d52f5295 ML |
686 | if (clone_of->clones) |
687 | clone_of->clones->prev_sibling_clone = next_inline_clone; | |
688 | next_inline_clone->next_sibling_clone = clone_of->clones; | |
689 | clone_of->clones = next_inline_clone; | |
564fe867 JH |
690 | } |
691 | ||
692 | /* Merge the clone list. */ | |
693 | if (new_clones) | |
694 | { | |
695 | if (!next_inline_clone->clones) | |
696 | next_inline_clone->clones = new_clones; | |
697 | else | |
698 | { | |
699 | n = next_inline_clone->clones; | |
700 | while (n->next_sibling_clone) | |
d52f5295 | 701 | n = n->next_sibling_clone; |
564fe867 JH |
702 | n->next_sibling_clone = new_clones; |
703 | new_clones->prev_sibling_clone = n; | |
704 | } | |
705 | } | |
706 | ||
707 | /* Update clone_of pointers. */ | |
708 | n = new_clones; | |
709 | while (n) | |
710 | { | |
711 | n->clone_of = next_inline_clone; | |
712 | n = n->next_sibling_clone; | |
713 | } | |
714 | return replacement; | |
715 | } | |
716 | else | |
717 | return NULL; | |
718 | } | |
719 | ||
720 | /* Like cgraph_set_call_stmt but walk the clone tree and update all | |
042ae7d2 JH |
721 | clones sharing the same function body. |
722 | When WHOLE_SPECULATIVE_EDGES is true, all three components of | |
723 | speculative edge gets updated. Otherwise we update only direct | |
724 | call. */ | |
564fe867 JH |
725 | |
726 | void | |
538dd0b7 DM |
727 | cgraph_node::set_call_stmt_including_clones (gimple old_stmt, |
728 | gcall *new_stmt, | |
d52f5295 | 729 | bool update_speculative) |
564fe867 | 730 | { |
3dafb85c ML |
731 | cgraph_node *node; |
732 | cgraph_edge *edge = get_edge (old_stmt); | |
564fe867 JH |
733 | |
734 | if (edge) | |
3dafb85c | 735 | edge->set_call_stmt (new_stmt, update_speculative); |
564fe867 | 736 | |
d52f5295 | 737 | node = clones; |
564fe867 | 738 | if (node) |
d52f5295 | 739 | while (node != this) |
564fe867 | 740 | { |
3dafb85c | 741 | cgraph_edge *edge = node->get_edge (old_stmt); |
564fe867 | 742 | if (edge) |
042ae7d2 | 743 | { |
3dafb85c | 744 | edge->set_call_stmt (new_stmt, update_speculative); |
042ae7d2 JH |
745 | /* If UPDATE_SPECULATIVE is false, it means that we are turning |
746 | speculative call into a real code sequence. Update the | |
747 | callgraph edges. */ | |
748 | if (edge->speculative && !update_speculative) | |
749 | { | |
3dafb85c ML |
750 | cgraph_edge *direct, *indirect; |
751 | ipa_ref *ref; | |
042ae7d2 JH |
752 | |
753 | gcc_assert (!edge->indirect_unknown_callee); | |
3dafb85c | 754 | edge->speculative_call_info (direct, indirect, ref); |
042ae7d2 JH |
755 | direct->speculative = false; |
756 | indirect->speculative = false; | |
757 | ref->speculative = false; | |
758 | } | |
759 | } | |
564fe867 JH |
760 | if (node->clones) |
761 | node = node->clones; | |
762 | else if (node->next_sibling_clone) | |
763 | node = node->next_sibling_clone; | |
764 | else | |
765 | { | |
d52f5295 | 766 | while (node != this && !node->next_sibling_clone) |
564fe867 | 767 | node = node->clone_of; |
d52f5295 | 768 | if (node != this) |
564fe867 JH |
769 | node = node->next_sibling_clone; |
770 | } | |
771 | } | |
772 | } | |
773 | ||
774 | /* Like cgraph_create_edge walk the clone tree and update all clones sharing | |
775 | same function body. If clones already have edge for OLD_STMT; only | |
776 | update the edge same way as cgraph_set_call_stmt_including_clones does. | |
777 | ||
778 | TODO: COUNT and LOOP_DEPTH should be properly distributed based on relative | |
779 | frequencies of the clones. */ | |
780 | ||
781 | void | |
3dafb85c | 782 | cgraph_node::create_edge_including_clones (cgraph_node *callee, |
538dd0b7 | 783 | gimple old_stmt, gcall *stmt, |
d52f5295 ML |
784 | gcov_type count, |
785 | int freq, | |
786 | cgraph_inline_failed_t reason) | |
564fe867 | 787 | { |
3dafb85c ML |
788 | cgraph_node *node; |
789 | cgraph_edge *edge; | |
564fe867 | 790 | |
d52f5295 | 791 | if (!get_edge (stmt)) |
564fe867 | 792 | { |
d52f5295 | 793 | edge = create_edge (callee, stmt, count, freq); |
564fe867 JH |
794 | edge->inline_failed = reason; |
795 | } | |
796 | ||
d52f5295 | 797 | node = clones; |
564fe867 | 798 | if (node) |
d52f5295 | 799 | while (node != this) |
564fe867 | 800 | { |
3dafb85c | 801 | cgraph_edge *edge = node->get_edge (old_stmt); |
564fe867 JH |
802 | |
803 | /* It is possible that clones already contain the edge while | |
804 | master didn't. Either we promoted indirect call into direct | |
805 | call in the clone or we are processing clones of unreachable | |
806 | master where edges has been removed. */ | |
807 | if (edge) | |
3dafb85c | 808 | edge->set_call_stmt (stmt); |
d52f5295 | 809 | else if (! node->get_edge (stmt)) |
564fe867 | 810 | { |
d52f5295 | 811 | edge = node->create_edge (callee, stmt, count, freq); |
564fe867 JH |
812 | edge->inline_failed = reason; |
813 | } | |
814 | ||
815 | if (node->clones) | |
816 | node = node->clones; | |
817 | else if (node->next_sibling_clone) | |
818 | node = node->next_sibling_clone; | |
819 | else | |
820 | { | |
d52f5295 | 821 | while (node != this && !node->next_sibling_clone) |
564fe867 | 822 | node = node->clone_of; |
d52f5295 | 823 | if (node != this) |
564fe867 JH |
824 | node = node->next_sibling_clone; |
825 | } | |
826 | } | |
827 | } | |
828 | ||
829 | /* Remove the node from cgraph and all inline clones inlined into it. | |
830 | Skip however removal of FORBIDDEN_NODE and return true if it needs to be | |
831 | removed. This allows to call the function from outer loop walking clone | |
832 | tree. */ | |
833 | ||
834 | bool | |
d52f5295 | 835 | cgraph_node::remove_symbol_and_inline_clones (cgraph_node *forbidden_node) |
564fe867 | 836 | { |
3dafb85c | 837 | cgraph_edge *e, *next; |
564fe867 JH |
838 | bool found = false; |
839 | ||
d52f5295 | 840 | if (this == forbidden_node) |
39f9719e | 841 | { |
3dafb85c | 842 | callers->remove (); |
39f9719e JH |
843 | return true; |
844 | } | |
d52f5295 | 845 | for (e = callees; e; e = next) |
564fe867 JH |
846 | { |
847 | next = e->next_callee; | |
848 | if (!e->inline_failed) | |
d52f5295 | 849 | found |= e->callee->remove_symbol_and_inline_clones (forbidden_node); |
564fe867 | 850 | } |
d52f5295 | 851 | remove (); |
564fe867 JH |
852 | return found; |
853 | } | |
854 | ||
855 | /* The edges representing the callers of the NEW_VERSION node were | |
856 | fixed by cgraph_function_versioning (), now the call_expr in their | |
857 | respective tree code should be updated to call the NEW_VERSION. */ | |
858 | ||
859 | static void | |
3dafb85c | 860 | update_call_expr (cgraph_node *new_version) |
564fe867 | 861 | { |
3dafb85c | 862 | cgraph_edge *e; |
564fe867 JH |
863 | |
864 | gcc_assert (new_version); | |
865 | ||
866 | /* Update the call expr on the edges to call the new version. */ | |
867 | for (e = new_version->callers; e; e = e->next_caller) | |
868 | { | |
3dafb85c | 869 | function *inner_function = DECL_STRUCT_FUNCTION (e->caller->decl); |
67348ccc | 870 | gimple_call_set_fndecl (e->call_stmt, new_version->decl); |
564fe867 JH |
871 | maybe_clean_eh_stmt_fn (inner_function, e->call_stmt); |
872 | } | |
873 | } | |
874 | ||
875 | ||
876 | /* Create a new cgraph node which is the new version of | |
d52f5295 | 877 | callgraph node. REDIRECT_CALLERS holds the callers |
564fe867 | 878 | edges which should be redirected to point to |
d52f5295 | 879 | NEW_VERSION. ALL the callees edges of the node |
564fe867 JH |
880 | are cloned to the new version node. Return the new |
881 | version node. | |
882 | ||
883 | If non-NULL BLOCK_TO_COPY determine what basic blocks | |
884 | was copied to prevent duplications of calls that are dead | |
885 | in the clone. */ | |
886 | ||
d52f5295 ML |
887 | cgraph_node * |
888 | cgraph_node::create_version_clone (tree new_decl, | |
889 | vec<cgraph_edge *> redirect_callers, | |
890 | bitmap bbs_to_copy) | |
564fe867 | 891 | { |
3dafb85c ML |
892 | cgraph_node *new_version; |
893 | cgraph_edge *e; | |
564fe867 JH |
894 | unsigned i; |
895 | ||
d52f5295 | 896 | new_version = cgraph_node::create (new_decl); |
564fe867 | 897 | |
d52f5295 ML |
898 | new_version->analyzed = analyzed; |
899 | new_version->definition = definition; | |
900 | new_version->local = local; | |
67348ccc | 901 | new_version->externally_visible = false; |
7861b648 | 902 | new_version->no_reorder = no_reorder; |
67348ccc | 903 | new_version->local.local = new_version->definition; |
d52f5295 ML |
904 | new_version->global = global; |
905 | new_version->rtl = rtl; | |
906 | new_version->count = count; | |
564fe867 | 907 | |
d52f5295 | 908 | for (e = callees; e; e=e->next_callee) |
564fe867 JH |
909 | if (!bbs_to_copy |
910 | || bitmap_bit_p (bbs_to_copy, gimple_bb (e->call_stmt)->index)) | |
3dafb85c ML |
911 | e->clone (new_version, e->call_stmt, |
912 | e->lto_stmt_uid, REG_BR_PROB_BASE, | |
913 | CGRAPH_FREQ_BASE, | |
914 | true); | |
d52f5295 | 915 | for (e = indirect_calls; e; e=e->next_callee) |
564fe867 JH |
916 | if (!bbs_to_copy |
917 | || bitmap_bit_p (bbs_to_copy, gimple_bb (e->call_stmt)->index)) | |
3dafb85c ML |
918 | e->clone (new_version, e->call_stmt, |
919 | e->lto_stmt_uid, REG_BR_PROB_BASE, | |
920 | CGRAPH_FREQ_BASE, | |
921 | true); | |
9771b263 | 922 | FOR_EACH_VEC_ELT (redirect_callers, i, e) |
564fe867 JH |
923 | { |
924 | /* Redirect calls to the old version node to point to its new | |
925 | version. */ | |
3dafb85c | 926 | e->redirect_callee (new_version); |
564fe867 JH |
927 | } |
928 | ||
3dafb85c | 929 | symtab->call_cgraph_duplication_hooks (this, new_version); |
564fe867 JH |
930 | |
931 | return new_version; | |
932 | } | |
933 | ||
934 | /* Perform function versioning. | |
935 | Function versioning includes copying of the tree and | |
936 | a callgraph update (creating a new cgraph node and updating | |
937 | its callees and callers). | |
938 | ||
939 | REDIRECT_CALLERS varray includes the edges to be redirected | |
940 | to the new version. | |
941 | ||
942 | TREE_MAP is a mapping of tree nodes we want to replace with | |
943 | new ones (according to results of prior analysis). | |
564fe867 JH |
944 | |
945 | If non-NULL ARGS_TO_SKIP determine function parameters to remove | |
946 | from new version. | |
947 | If SKIP_RETURN is true, the new version will return void. | |
948 | If non-NULL BLOCK_TO_COPY determine what basic blocks to copy. | |
949 | If non_NULL NEW_ENTRY determine new entry BB of the clone. | |
950 | ||
951 | Return the new version's cgraph node. */ | |
952 | ||
d52f5295 ML |
953 | cgraph_node * |
954 | cgraph_node::create_version_clone_with_body | |
955 | (vec<cgraph_edge *> redirect_callers, | |
956 | vec<ipa_replace_map *, va_gc> *tree_map, bitmap args_to_skip, | |
957 | bool skip_return, bitmap bbs_to_copy, basic_block new_entry_block, | |
958 | const char *clone_name) | |
564fe867 | 959 | { |
d52f5295 | 960 | tree old_decl = decl; |
3dafb85c | 961 | cgraph_node *new_version_node = NULL; |
564fe867 JH |
962 | tree new_decl; |
963 | ||
964 | if (!tree_versionable_function_p (old_decl)) | |
965 | return NULL; | |
966 | ||
d52f5295 | 967 | gcc_assert (local.can_change_signature || !args_to_skip); |
564fe867 JH |
968 | |
969 | /* Make a new FUNCTION_DECL tree node for the new version. */ | |
970 | if (!args_to_skip && !skip_return) | |
971 | new_decl = copy_node (old_decl); | |
972 | else | |
973 | new_decl | |
974 | = build_function_decl_skip_args (old_decl, args_to_skip, skip_return); | |
975 | ||
976 | /* Generate a new name for the new version. */ | |
977 | DECL_NAME (new_decl) = clone_function_name (old_decl, clone_name); | |
978 | SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl)); | |
979 | SET_DECL_RTL (new_decl, NULL); | |
980 | ||
981 | /* When the old decl was a con-/destructor make sure the clone isn't. */ | |
c3284718 RS |
982 | DECL_STATIC_CONSTRUCTOR (new_decl) = 0; |
983 | DECL_STATIC_DESTRUCTOR (new_decl) = 0; | |
564fe867 JH |
984 | |
985 | /* Create the new version's call-graph node. | |
986 | and update the edges of the new node. */ | |
d52f5295 ML |
987 | new_version_node = create_version_clone (new_decl, redirect_callers, |
988 | bbs_to_copy); | |
564fe867 | 989 | |
d52f5295 | 990 | if (ipa_transforms_to_apply.exists ()) |
c6d43074 | 991 | new_version_node->ipa_transforms_to_apply |
d52f5295 | 992 | = ipa_transforms_to_apply.copy (); |
564fe867 JH |
993 | /* Copy the OLD_VERSION_NODE function tree to the new version. */ |
994 | tree_function_versioning (old_decl, new_decl, tree_map, false, args_to_skip, | |
995 | skip_return, bbs_to_copy, new_entry_block); | |
996 | ||
997 | /* Update the new version's properties. | |
998 | Make The new version visible only within this translation unit. Make sure | |
999 | that is not weak also. | |
1000 | ??? We cannot use COMDAT linkage because there is no | |
1001 | ABI support for this. */ | |
d52f5295 | 1002 | new_version_node->make_decl_local (); |
67348ccc DM |
1003 | DECL_VIRTUAL_P (new_version_node->decl) = 0; |
1004 | new_version_node->externally_visible = 0; | |
564fe867 JH |
1005 | new_version_node->local.local = 1; |
1006 | new_version_node->lowered = true; | |
4ab26ee0 JJ |
1007 | if (!implicit_section) |
1008 | new_version_node->set_section (get_section ()); | |
702d8703 JH |
1009 | /* Clones of global symbols or symbols with unique names are unique. */ |
1010 | if ((TREE_PUBLIC (old_decl) | |
1011 | && !DECL_EXTERNAL (old_decl) | |
1012 | && !DECL_WEAK (old_decl) | |
1013 | && !DECL_COMDAT (old_decl)) | |
1014 | || in_lto_p) | |
67348ccc | 1015 | new_version_node->unique_name = true; |
564fe867 JH |
1016 | |
1017 | /* Update the call_expr on the edges to call the new version node. */ | |
1018 | update_call_expr (new_version_node); | |
1019 | ||
3dafb85c | 1020 | symtab->call_cgraph_insertion_hooks (this); |
564fe867 JH |
1021 | return new_version_node; |
1022 | } | |
1023 | ||
1024 | /* Given virtual clone, turn it into actual clone. */ | |
1025 | ||
1026 | static void | |
3dafb85c | 1027 | cgraph_materialize_clone (cgraph_node *node) |
564fe867 JH |
1028 | { |
1029 | bitmap_obstack_initialize (NULL); | |
67348ccc | 1030 | node->former_clone_of = node->clone_of->decl; |
564fe867 JH |
1031 | if (node->clone_of->former_clone_of) |
1032 | node->former_clone_of = node->clone_of->former_clone_of; | |
1033 | /* Copy the OLD_VERSION_NODE function tree to the new version. */ | |
67348ccc | 1034 | tree_function_versioning (node->clone_of->decl, node->decl, |
564fe867 JH |
1035 | node->clone.tree_map, true, |
1036 | node->clone.args_to_skip, false, | |
1037 | NULL, NULL); | |
3dafb85c | 1038 | if (symtab->dump_file) |
564fe867 | 1039 | { |
3dafb85c ML |
1040 | dump_function_to_file (node->clone_of->decl, symtab->dump_file, |
1041 | dump_flags); | |
1042 | dump_function_to_file (node->decl, symtab->dump_file, dump_flags); | |
564fe867 JH |
1043 | } |
1044 | ||
1045 | /* Function is no longer clone. */ | |
1046 | if (node->next_sibling_clone) | |
1047 | node->next_sibling_clone->prev_sibling_clone = node->prev_sibling_clone; | |
1048 | if (node->prev_sibling_clone) | |
1049 | node->prev_sibling_clone->next_sibling_clone = node->next_sibling_clone; | |
1050 | else | |
1051 | node->clone_of->clones = node->next_sibling_clone; | |
1052 | node->next_sibling_clone = NULL; | |
1053 | node->prev_sibling_clone = NULL; | |
67348ccc | 1054 | if (!node->clone_of->analyzed && !node->clone_of->clones) |
564fe867 | 1055 | { |
d52f5295 ML |
1056 | node->clone_of->release_body (); |
1057 | node->clone_of->remove_callees (); | |
d122681a | 1058 | node->clone_of->remove_all_references (); |
564fe867 JH |
1059 | } |
1060 | node->clone_of = NULL; | |
1061 | bitmap_obstack_release (NULL); | |
1062 | } | |
1063 | ||
1064 | /* Once all functions from compilation unit are in memory, produce all clones | |
1065 | and update all calls. We might also do this on demand if we don't want to | |
1066 | bring all functions to memory prior compilation, but current WHOPR | |
1067 | implementation does that and it is is bit easier to keep everything right in | |
1068 | this order. */ | |
1069 | ||
1070 | void | |
3dafb85c | 1071 | symbol_table::materialize_all_clones (void) |
564fe867 | 1072 | { |
3dafb85c | 1073 | cgraph_node *node; |
564fe867 | 1074 | bool stabilized = false; |
042ae7d2 | 1075 | |
564fe867 | 1076 | |
3dafb85c ML |
1077 | if (symtab->dump_file) |
1078 | fprintf (symtab->dump_file, "Materializing clones\n"); | |
564fe867 | 1079 | #ifdef ENABLE_CHECKING |
d52f5295 | 1080 | cgraph_node::verify_cgraph_nodes (); |
564fe867 JH |
1081 | #endif |
1082 | ||
1083 | /* We can also do topological order, but number of iterations should be | |
1084 | bounded by number of IPA passes since single IPA pass is probably not | |
1085 | going to create clones of clones it created itself. */ | |
1086 | while (!stabilized) | |
1087 | { | |
1088 | stabilized = true; | |
1089 | FOR_EACH_FUNCTION (node) | |
1090 | { | |
67348ccc DM |
1091 | if (node->clone_of && node->decl != node->clone_of->decl |
1092 | && !gimple_has_body_p (node->decl)) | |
564fe867 | 1093 | { |
a2e2a668 | 1094 | if (!node->clone_of->clone_of) |
70486010 | 1095 | node->clone_of->get_untransformed_body (); |
67348ccc | 1096 | if (gimple_has_body_p (node->clone_of->decl)) |
564fe867 | 1097 | { |
3dafb85c | 1098 | if (symtab->dump_file) |
564fe867 | 1099 | { |
3dafb85c | 1100 | fprintf (symtab->dump_file, "cloning %s to %s\n", |
2a72a953 DM |
1101 | xstrdup_for_dump (node->clone_of->name ()), |
1102 | xstrdup_for_dump (node->name ())); | |
564fe867 JH |
1103 | if (node->clone.tree_map) |
1104 | { | |
1105 | unsigned int i; | |
3dafb85c | 1106 | fprintf (symtab->dump_file, " replace map: "); |
9771b263 DN |
1107 | for (i = 0; |
1108 | i < vec_safe_length (node->clone.tree_map); | |
1109 | i++) | |
564fe867 | 1110 | { |
3dafb85c | 1111 | ipa_replace_map *replace_info; |
9771b263 | 1112 | replace_info = (*node->clone.tree_map)[i]; |
3dafb85c ML |
1113 | print_generic_expr (symtab->dump_file, replace_info->old_tree, 0); |
1114 | fprintf (symtab->dump_file, " -> "); | |
1115 | print_generic_expr (symtab->dump_file, replace_info->new_tree, 0); | |
1116 | fprintf (symtab->dump_file, "%s%s;", | |
564fe867 JH |
1117 | replace_info->replace_p ? "(replace)":"", |
1118 | replace_info->ref_p ? "(ref)":""); | |
1119 | } | |
3dafb85c | 1120 | fprintf (symtab->dump_file, "\n"); |
564fe867 JH |
1121 | } |
1122 | if (node->clone.args_to_skip) | |
1123 | { | |
3dafb85c ML |
1124 | fprintf (symtab->dump_file, " args_to_skip: "); |
1125 | dump_bitmap (symtab->dump_file, | |
1126 | node->clone.args_to_skip); | |
564fe867 JH |
1127 | } |
1128 | if (node->clone.args_to_skip) | |
1129 | { | |
3dafb85c ML |
1130 | fprintf (symtab->dump_file, " combined_args_to_skip:"); |
1131 | dump_bitmap (symtab->dump_file, node->clone.combined_args_to_skip); | |
564fe867 JH |
1132 | } |
1133 | } | |
1134 | cgraph_materialize_clone (node); | |
1135 | stabilized = false; | |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | } | |
1140 | FOR_EACH_FUNCTION (node) | |
67348ccc | 1141 | if (!node->analyzed && node->callees) |
71cafea9 | 1142 | { |
d52f5295 | 1143 | node->remove_callees (); |
d122681a | 1144 | node->remove_all_references (); |
71cafea9 JH |
1145 | } |
1146 | else | |
d122681a | 1147 | node->clear_stmts_in_references (); |
3dafb85c ML |
1148 | if (symtab->dump_file) |
1149 | fprintf (symtab->dump_file, "Materialization Call site updates done.\n"); | |
564fe867 | 1150 | #ifdef ENABLE_CHECKING |
d52f5295 | 1151 | cgraph_node::verify_cgraph_nodes (); |
564fe867 | 1152 | #endif |
17e0fc92 | 1153 | symtab->remove_unreachable_nodes (symtab->dump_file); |
564fe867 JH |
1154 | } |
1155 | ||
1156 | #include "gt-cgraphclones.h" |