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cd6bca02 | 1 | /* Callgraph based interprocedural optimizations. |
aed6e608 | 2 | Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, |
3 | 2011 Free Software Foundation, Inc. | |
ae01b312 | 4 | Contributed by Jan Hubicka |
5 | ||
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
8c4c00c1 | 10 | Software Foundation; either version 3, or (at your option) any later |
ae01b312 | 11 | version. |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
ae01b312 | 21 | |
b0cdf642 | 22 | /* This module implements main driver of compilation process as well as |
cd6bca02 | 23 | few basic interprocedural optimizers. |
b0cdf642 | 24 | |
25 | The main scope of this file is to act as an interface in between | |
26 | tree based frontends and the backend (and middle end) | |
27 | ||
28 | The front-end is supposed to use following functionality: | |
29 | ||
30 | - cgraph_finalize_function | |
31 | ||
32 | This function is called once front-end has parsed whole body of function | |
33 | and it is certain that the function body nor the declaration will change. | |
34 | ||
b326746d | 35 | (There is one exception needed for implementing GCC extern inline |
36 | function.) | |
b0cdf642 | 37 | |
1d416bd7 | 38 | - varpool_finalize_variable |
b0cdf642 | 39 | |
7bd28bba | 40 | This function has same behavior as the above but is used for static |
b0cdf642 | 41 | variables. |
42 | ||
43 | - cgraph_finalize_compilation_unit | |
44 | ||
b326746d | 45 | This function is called once (source level) compilation unit is finalized |
46 | and it will no longer change. | |
b0cdf642 | 47 | |
851d9296 | 48 | In the call-graph construction and local function analysis takes |
49 | place here. Bodies of unreachable functions are released to | |
50 | conserve memory usage. | |
b0cdf642 | 51 | |
b326746d | 52 | The function can be called multiple times when multiple source level |
53 | compilation units are combined (such as in C frontend) | |
b0cdf642 | 54 | |
55 | - cgraph_optimize | |
56 | ||
57 | In this unit-at-a-time compilation the intra procedural analysis takes | |
58 | place here. In particular the static functions whose address is never | |
59 | taken are marked as local. Backend can then use this information to | |
60 | modify calling conventions, do better inlining or similar optimizations. | |
61 | ||
b0cdf642 | 62 | - cgraph_mark_needed_node |
1d416bd7 | 63 | - varpool_mark_needed_node |
b0cdf642 | 64 | |
b326746d | 65 | When function or variable is referenced by some hidden way the call-graph |
66 | data structure must be updated accordingly by this function. | |
67 | There should be little need to call this function and all the references | |
68 | should be made explicit to cgraph code. At present these functions are | |
ccd2f3d1 | 69 | used by C++ frontend to explicitly mark the keyed methods. |
b0cdf642 | 70 | |
71 | - analyze_expr callback | |
72 | ||
73 | This function is responsible for lowering tree nodes not understood by | |
74 | generic code into understandable ones or alternatively marking | |
75 | callgraph and varpool nodes referenced by the as needed. | |
76 | ||
77 | ??? On the tree-ssa genericizing should take place here and we will avoid | |
78 | need for these hooks (replacing them by genericizing hook) | |
79 | ||
6329636b | 80 | Analyzing of all functions is deferred |
b0cdf642 | 81 | to cgraph_finalize_compilation_unit and expansion into cgraph_optimize. |
82 | ||
83 | In cgraph_finalize_compilation_unit the reachable functions are | |
84 | analyzed. During analysis the call-graph edges from reachable | |
85 | functions are constructed and their destinations are marked as | |
86 | reachable. References to functions and variables are discovered too | |
87 | and variables found to be needed output to the assembly file. Via | |
88 | mark_referenced call in assemble_variable functions referenced by | |
89 | static variables are noticed too. | |
90 | ||
ca67a72b | 91 | The intra-procedural information is produced and its existence |
b0cdf642 | 92 | indicated by global_info_ready. Once this flag is set it is impossible |
93 | to change function from !reachable to reachable and thus | |
94 | assemble_variable no longer call mark_referenced. | |
95 | ||
96 | Finally the call-graph is topologically sorted and all reachable functions | |
97 | that has not been completely inlined or are not external are output. | |
98 | ||
99 | ??? It is possible that reference to function or variable is optimized | |
100 | out. We can not deal with this nicely because topological order is not | |
101 | suitable for it. For tree-ssa we may consider another pass doing | |
102 | optimization and re-discovering reachable functions. | |
103 | ||
104 | ??? Reorganize code so variables are output very last and only if they | |
105 | really has been referenced by produced code, so we catch more cases | |
6329636b | 106 | where reference has been optimized out. */ |
121f3051 | 107 | |
acc70efa | 108 | |
ae01b312 | 109 | #include "config.h" |
110 | #include "system.h" | |
111 | #include "coretypes.h" | |
112 | #include "tm.h" | |
113 | #include "tree.h" | |
b5530559 | 114 | #include "rtl.h" |
acc70efa | 115 | #include "tree-flow.h" |
ae01b312 | 116 | #include "tree-inline.h" |
117 | #include "langhooks.h" | |
c6224531 | 118 | #include "pointer-set.h" |
ae01b312 | 119 | #include "toplev.h" |
120 | #include "flags.h" | |
121 | #include "ggc.h" | |
122 | #include "debug.h" | |
123 | #include "target.h" | |
124 | #include "cgraph.h" | |
80a85d8a | 125 | #include "diagnostic.h" |
ce084dfc | 126 | #include "tree-pretty-print.h" |
127 | #include "gimple-pretty-print.h" | |
f79b6507 | 128 | #include "timevar.h" |
d7c6d889 | 129 | #include "params.h" |
130 | #include "fibheap.h" | |
611e5405 | 131 | #include "intl.h" |
b69eb0ff | 132 | #include "function.h" |
b5d36404 | 133 | #include "ipa-prop.h" |
75a70cf9 | 134 | #include "gimple.h" |
135 | #include "tree-iterator.h" | |
f1e2a033 | 136 | #include "tree-pass.h" |
bfec3452 | 137 | #include "tree-dump.h" |
c1dcd13c | 138 | #include "output.h" |
9ed5b1f5 | 139 | #include "coverage.h" |
c9036234 | 140 | #include "plugin.h" |
a41f2a28 | 141 | #include "ipa-inline.h" |
7771d558 | 142 | #include "ipa-utils.h" |
a0605d65 | 143 | #include "lto-streamer.h" |
d7c6d889 | 144 | |
a6868229 | 145 | static void cgraph_expand_all_functions (void); |
d9d9733a | 146 | static void cgraph_mark_functions_to_output (void); |
147 | static void cgraph_expand_function (struct cgraph_node *); | |
f788fff2 | 148 | static void cgraph_output_pending_asms (void); |
25bb88de | 149 | |
ecb08119 | 150 | FILE *cgraph_dump_file; |
121f3051 | 151 | |
28454517 | 152 | /* Used for vtable lookup in thunk adjusting. */ |
153 | static GTY (()) tree vtable_entry_type; | |
154 | ||
2c0b522d | 155 | /* Determine if function DECL is needed. That is, visible to something |
156 | either outside this translation unit, something magic in the system | |
6329636b | 157 | configury. */ |
2c0b522d | 158 | |
7bfefa9d | 159 | bool |
160 | cgraph_decide_is_function_needed (struct cgraph_node *node, tree decl) | |
2c0b522d | 161 | { |
3f82b628 | 162 | /* If the user told us it is used, then it must be so. */ |
05806473 | 163 | if (node->local.externally_visible) |
164 | return true; | |
165 | ||
3f82b628 | 166 | /* ??? If the assembler name is set by hand, it is possible to assemble |
167 | the name later after finalizing the function and the fact is noticed | |
168 | in assemble_name then. This is arguably a bug. */ | |
169 | if (DECL_ASSEMBLER_NAME_SET_P (decl) | |
c70f46b0 | 170 | && (!node->thunk.thunk_p && !node->same_body_alias) |
3f82b628 | 171 | && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))) |
172 | return true; | |
173 | ||
55680bef | 174 | /* With -fkeep-inline-functions we are keeping all inline functions except |
175 | for extern inline ones. */ | |
176 | if (flag_keep_inline_functions | |
177 | && DECL_DECLARED_INLINE_P (decl) | |
316ef6d8 | 178 | && !DECL_EXTERNAL (decl) |
cbd7f5a0 | 179 | && !DECL_DISREGARD_INLINE_LIMITS (decl)) |
55680bef | 180 | return true; |
181 | ||
2c0b522d | 182 | /* If we decided it was needed before, but at the time we didn't have |
183 | the body of the function available, then it's still needed. We have | |
184 | to go back and re-check its dependencies now. */ | |
185 | if (node->needed) | |
186 | return true; | |
187 | ||
188 | /* Externally visible functions must be output. The exception is | |
a0c938f0 | 189 | COMDAT functions that must be output only when they are needed. |
8baa9d15 | 190 | |
191 | When not optimizing, also output the static functions. (see | |
95da6220 | 192 | PR24561), but don't do so for always_inline functions, functions |
0f9238c0 | 193 | declared inline and nested functions. These were optimized out |
d3d410e1 | 194 | in the original implementation and it is unclear whether we want |
554f2707 | 195 | to change the behavior here. */ |
bba7ddf8 | 196 | if (((TREE_PUBLIC (decl) |
0f9238c0 | 197 | || (!optimize |
cbd7f5a0 | 198 | && !DECL_DISREGARD_INLINE_LIMITS (decl) |
d3d410e1 | 199 | && !DECL_DECLARED_INLINE_P (decl) |
0f9238c0 | 200 | && !(DECL_CONTEXT (decl) |
201 | && TREE_CODE (DECL_CONTEXT (decl)) == FUNCTION_DECL))) | |
59dd4830 | 202 | && !flag_whole_program |
cbcf2791 | 203 | && !flag_lto) |
62eec3b4 | 204 | && !DECL_COMDAT (decl) && !DECL_EXTERNAL (decl)) |
2c0b522d | 205 | return true; |
206 | ||
2c0b522d | 207 | return false; |
208 | } | |
209 | ||
bdc40eb8 | 210 | /* Process CGRAPH_NEW_FUNCTIONS and perform actions necessary to add these |
523c1122 | 211 | functions into callgraph in a way so they look like ordinary reachable |
212 | functions inserted into callgraph already at construction time. */ | |
213 | ||
214 | bool | |
215 | cgraph_process_new_functions (void) | |
216 | { | |
217 | bool output = false; | |
218 | tree fndecl; | |
219 | struct cgraph_node *node; | |
220 | ||
0cddb138 | 221 | varpool_analyze_pending_decls (); |
523c1122 | 222 | /* Note that this queue may grow as its being processed, as the new |
223 | functions may generate new ones. */ | |
224 | while (cgraph_new_nodes) | |
225 | { | |
226 | node = cgraph_new_nodes; | |
227 | fndecl = node->decl; | |
228 | cgraph_new_nodes = cgraph_new_nodes->next_needed; | |
229 | switch (cgraph_state) | |
230 | { | |
231 | case CGRAPH_STATE_CONSTRUCTION: | |
232 | /* At construction time we just need to finalize function and move | |
233 | it into reachable functions list. */ | |
234 | ||
235 | node->next_needed = NULL; | |
236 | cgraph_finalize_function (fndecl, false); | |
237 | cgraph_mark_reachable_node (node); | |
238 | output = true; | |
4f7a1122 | 239 | cgraph_call_function_insertion_hooks (node); |
523c1122 | 240 | break; |
241 | ||
242 | case CGRAPH_STATE_IPA: | |
f517b36e | 243 | case CGRAPH_STATE_IPA_SSA: |
523c1122 | 244 | /* When IPA optimization already started, do all essential |
245 | transformations that has been already performed on the whole | |
246 | cgraph but not on this function. */ | |
247 | ||
75a70cf9 | 248 | gimple_register_cfg_hooks (); |
523c1122 | 249 | if (!node->analyzed) |
250 | cgraph_analyze_function (node); | |
251 | push_cfun (DECL_STRUCT_FUNCTION (fndecl)); | |
252 | current_function_decl = fndecl; | |
f517b36e | 253 | if ((cgraph_state == CGRAPH_STATE_IPA_SSA |
254 | && !gimple_in_ssa_p (DECL_STRUCT_FUNCTION (fndecl))) | |
255 | /* When not optimizing, be sure we run early local passes anyway | |
256 | to expand OMP. */ | |
257 | || !optimize) | |
20099e35 | 258 | execute_pass_list (pass_early_local_passes.pass.sub); |
649597af | 259 | else |
a41f2a28 | 260 | compute_inline_parameters (node, true); |
523c1122 | 261 | free_dominance_info (CDI_POST_DOMINATORS); |
262 | free_dominance_info (CDI_DOMINATORS); | |
263 | pop_cfun (); | |
264 | current_function_decl = NULL; | |
4f7a1122 | 265 | cgraph_call_function_insertion_hooks (node); |
523c1122 | 266 | break; |
267 | ||
268 | case CGRAPH_STATE_EXPANSION: | |
269 | /* Functions created during expansion shall be compiled | |
270 | directly. */ | |
09fc9532 | 271 | node->process = 0; |
4f7a1122 | 272 | cgraph_call_function_insertion_hooks (node); |
523c1122 | 273 | cgraph_expand_function (node); |
274 | break; | |
275 | ||
276 | default: | |
277 | gcc_unreachable (); | |
278 | break; | |
279 | } | |
0cddb138 | 280 | varpool_analyze_pending_decls (); |
523c1122 | 281 | } |
282 | return output; | |
283 | } | |
284 | ||
9b8fb23a | 285 | /* As an GCC extension we allow redefinition of the function. The |
286 | semantics when both copies of bodies differ is not well defined. | |
287 | We replace the old body with new body so in unit at a time mode | |
288 | we always use new body, while in normal mode we may end up with | |
289 | old body inlined into some functions and new body expanded and | |
290 | inlined in others. | |
291 | ||
292 | ??? It may make more sense to use one body for inlining and other | |
293 | body for expanding the function but this is difficult to do. */ | |
294 | ||
295 | static void | |
296 | cgraph_reset_node (struct cgraph_node *node) | |
297 | { | |
09fc9532 | 298 | /* If node->process is set, then we have already begun whole-unit analysis. |
6329636b | 299 | This is *not* testing for whether we've already emitted the function. |
300 | That case can be sort-of legitimately seen with real function redefinition | |
301 | errors. I would argue that the front end should never present us with | |
302 | such a case, but don't enforce that for now. */ | |
09fc9532 | 303 | gcc_assert (!node->process); |
9b8fb23a | 304 | |
305 | /* Reset our data structures so we can analyze the function again. */ | |
306 | memset (&node->local, 0, sizeof (node->local)); | |
307 | memset (&node->global, 0, sizeof (node->global)); | |
308 | memset (&node->rtl, 0, sizeof (node->rtl)); | |
309 | node->analyzed = false; | |
9b8fb23a | 310 | node->local.finalized = false; |
311 | ||
9b8fb23a | 312 | cgraph_node_remove_callees (node); |
9b8fb23a | 313 | } |
c08871a9 | 314 | |
1e8e9920 | 315 | static void |
316 | cgraph_lower_function (struct cgraph_node *node) | |
317 | { | |
318 | if (node->lowered) | |
319 | return; | |
bfec3452 | 320 | |
321 | if (node->nested) | |
322 | lower_nested_functions (node->decl); | |
323 | gcc_assert (!node->nested); | |
324 | ||
1e8e9920 | 325 | tree_lowering_passes (node->decl); |
326 | node->lowered = true; | |
327 | } | |
328 | ||
28df663b | 329 | /* DECL has been parsed. Take it, queue it, compile it at the whim of the |
330 | logic in effect. If NESTED is true, then our caller cannot stand to have | |
331 | the garbage collector run at the moment. We would need to either create | |
332 | a new GC context, or just not compile right now. */ | |
ae01b312 | 333 | |
334 | void | |
28df663b | 335 | cgraph_finalize_function (tree decl, bool nested) |
ae01b312 | 336 | { |
5a90471f | 337 | struct cgraph_node *node = cgraph_get_create_node (decl); |
ae01b312 | 338 | |
c08871a9 | 339 | if (node->local.finalized) |
443089c1 | 340 | { |
341 | cgraph_reset_node (node); | |
342 | node->local.redefined_extern_inline = true; | |
343 | } | |
28df663b | 344 | |
c08871a9 | 345 | notice_global_symbol (decl); |
79bb87b4 | 346 | node->local.finalized = true; |
e27482aa | 347 | node->lowered = DECL_STRUCT_FUNCTION (decl)->cfg != NULL; |
ae01b312 | 348 | |
7bfefa9d | 349 | if (cgraph_decide_is_function_needed (node, decl)) |
2c0b522d | 350 | cgraph_mark_needed_node (node); |
351 | ||
ecda6e51 | 352 | /* Since we reclaim unreachable nodes at the end of every language |
3f82b628 | 353 | level unit, we need to be conservative about possible entry points |
354 | there. */ | |
1e3aebec | 355 | if ((TREE_PUBLIC (decl) && !DECL_COMDAT (decl) && !DECL_EXTERNAL (decl)) |
356 | || DECL_STATIC_CONSTRUCTOR (decl) | |
d050bafd | 357 | || DECL_STATIC_DESTRUCTOR (decl) |
358 | /* COMDAT virtual functions may be referenced by vtable from | |
0a10fd82 | 359 | other compilation unit. Still we want to devirtualize calls |
d050bafd | 360 | to those so we need to analyze them. |
361 | FIXME: We should introduce may edges for this purpose and update | |
362 | their handling in unreachable function removal and inliner too. */ | |
91bf9d9a | 363 | || (DECL_VIRTUAL_P (decl) |
364 | && optimize && (DECL_COMDAT (decl) || DECL_EXTERNAL (decl)))) | |
3f82b628 | 365 | cgraph_mark_reachable_node (node); |
366 | ||
2c0b522d | 367 | /* If we've not yet emitted decl, tell the debug info about it. */ |
28df663b | 368 | if (!TREE_ASM_WRITTEN (decl)) |
2c0b522d | 369 | (*debug_hooks->deferred_inline_function) (decl); |
4e8871a0 | 370 | |
b69eb0ff | 371 | /* Possibly warn about unused parameters. */ |
372 | if (warn_unused_parameter) | |
373 | do_warn_unused_parameter (decl); | |
6329636b | 374 | |
375 | if (!nested) | |
376 | ggc_collect (); | |
ae01b312 | 377 | } |
378 | ||
0da03d11 | 379 | /* C99 extern inline keywords allow changing of declaration after function |
380 | has been finalized. We need to re-decide if we want to mark the function as | |
381 | needed then. */ | |
382 | ||
383 | void | |
384 | cgraph_mark_if_needed (tree decl) | |
385 | { | |
fd6a3c41 | 386 | struct cgraph_node *node = cgraph_get_node (decl); |
7bfefa9d | 387 | if (node->local.finalized && cgraph_decide_is_function_needed (node, decl)) |
0da03d11 | 388 | cgraph_mark_needed_node (node); |
389 | } | |
390 | ||
ccf4ab6b | 391 | /* Return TRUE if NODE2 is equivalent to NODE or its clone. */ |
392 | static bool | |
393 | clone_of_p (struct cgraph_node *node, struct cgraph_node *node2) | |
394 | { | |
c70f46b0 | 395 | node = cgraph_function_or_thunk_node (node, NULL); |
396 | node2 = cgraph_function_or_thunk_node (node2, NULL); | |
ccf4ab6b | 397 | while (node != node2 && node2) |
398 | node2 = node2->clone_of; | |
399 | return node2 != NULL; | |
400 | } | |
401 | ||
1a036a3b | 402 | /* Verify edge E count and frequency. */ |
403 | ||
404 | static bool | |
405 | verify_edge_count_and_frequency (struct cgraph_edge *e) | |
406 | { | |
407 | bool error_found = false; | |
408 | if (e->count < 0) | |
409 | { | |
410 | error ("caller edge count is negative"); | |
411 | error_found = true; | |
412 | } | |
413 | if (e->frequency < 0) | |
414 | { | |
415 | error ("caller edge frequency is negative"); | |
416 | error_found = true; | |
417 | } | |
418 | if (e->frequency > CGRAPH_FREQ_MAX) | |
419 | { | |
420 | error ("caller edge frequency is too large"); | |
421 | error_found = true; | |
422 | } | |
423 | if (gimple_has_body_p (e->caller->decl) | |
424 | && !e->caller->global.inlined_to | |
8bae3ea4 | 425 | /* FIXME: Inline-analysis sets frequency to 0 when edge is optimized out. |
426 | Remove this once edges are actualy removed from the function at that time. */ | |
427 | && (e->frequency | |
428 | || (inline_edge_summary_vec | |
429 | && !inline_edge_summary (e)->predicate)) | |
1a036a3b | 430 | && (e->frequency |
431 | != compute_call_stmt_bb_frequency (e->caller->decl, | |
432 | gimple_bb (e->call_stmt)))) | |
433 | { | |
0a10fd82 | 434 | error ("caller edge frequency %i does not match BB frequency %i", |
1a036a3b | 435 | e->frequency, |
436 | compute_call_stmt_bb_frequency (e->caller->decl, | |
437 | gimple_bb (e->call_stmt))); | |
438 | error_found = true; | |
439 | } | |
440 | return error_found; | |
441 | } | |
442 | ||
7b29dd2f | 443 | /* Switch to THIS_CFUN if needed and print STMT to stderr. */ |
444 | static void | |
445 | cgraph_debug_gimple_stmt (struct function *this_cfun, gimple stmt) | |
446 | { | |
447 | /* debug_gimple_stmt needs correct cfun */ | |
448 | if (cfun != this_cfun) | |
449 | set_cfun (this_cfun); | |
450 | debug_gimple_stmt (stmt); | |
451 | } | |
452 | ||
2f9d66d3 | 453 | /* Verify that call graph edge E corresponds to DECL from the associated |
454 | statement. Return true if the verification should fail. */ | |
455 | ||
456 | static bool | |
457 | verify_edge_corresponds_to_fndecl (struct cgraph_edge *e, tree decl) | |
458 | { | |
459 | if (!e->callee->global.inlined_to | |
460 | && decl | |
461 | && cgraph_get_node (decl) | |
462 | && (e->callee->former_clone_of | |
463 | != cgraph_function_or_thunk_node (cgraph_get_node (decl), NULL)->decl) | |
464 | /* IPA-CP sometimes redirect edge to clone and then back to the former | |
465 | function. This ping-pong has to go, eventaully. */ | |
466 | && (cgraph_function_or_thunk_node (cgraph_get_node (decl), NULL) | |
467 | != cgraph_function_or_thunk_node (e->callee, NULL)) | |
468 | && !clone_of_p (cgraph_get_node (decl), | |
469 | e->callee)) | |
470 | return true; | |
471 | else | |
472 | return false; | |
473 | } | |
474 | ||
b0cdf642 | 475 | /* Verify cgraph nodes of given cgraph node. */ |
4b987fac | 476 | DEBUG_FUNCTION void |
b0cdf642 | 477 | verify_cgraph_node (struct cgraph_node *node) |
478 | { | |
479 | struct cgraph_edge *e; | |
e27482aa | 480 | struct function *this_cfun = DECL_STRUCT_FUNCTION (node->decl); |
481 | basic_block this_block; | |
75a70cf9 | 482 | gimple_stmt_iterator gsi; |
9bfec7c2 | 483 | bool error_found = false; |
b0cdf642 | 484 | |
852f689e | 485 | if (seen_error ()) |
bd09cd3e | 486 | return; |
487 | ||
b0cdf642 | 488 | timevar_push (TV_CGRAPH_VERIFY); |
b0cdf642 | 489 | for (e = node->callees; e; e = e->next_callee) |
490 | if (e->aux) | |
491 | { | |
0a81f5a0 | 492 | error ("aux field set for edge %s->%s", |
abd3e6b5 | 493 | identifier_to_locale (cgraph_node_name (e->caller)), |
494 | identifier_to_locale (cgraph_node_name (e->callee))); | |
b0cdf642 | 495 | error_found = true; |
496 | } | |
a2cb9b3b | 497 | if (node->count < 0) |
498 | { | |
bf776685 | 499 | error ("execution count is negative"); |
a2cb9b3b | 500 | error_found = true; |
501 | } | |
59dd4830 | 502 | if (node->global.inlined_to && node->local.externally_visible) |
503 | { | |
bf776685 | 504 | error ("externally visible inline clone"); |
59dd4830 | 505 | error_found = true; |
506 | } | |
507 | if (node->global.inlined_to && node->address_taken) | |
508 | { | |
bf776685 | 509 | error ("inline clone with address taken"); |
59dd4830 | 510 | error_found = true; |
511 | } | |
512 | if (node->global.inlined_to && node->needed) | |
513 | { | |
bf776685 | 514 | error ("inline clone is needed"); |
59dd4830 | 515 | error_found = true; |
516 | } | |
799c8711 | 517 | for (e = node->indirect_calls; e; e = e->next_callee) |
518 | { | |
519 | if (e->aux) | |
520 | { | |
521 | error ("aux field set for indirect edge from %s", | |
522 | identifier_to_locale (cgraph_node_name (e->caller))); | |
523 | error_found = true; | |
524 | } | |
525 | if (!e->indirect_unknown_callee | |
526 | || !e->indirect_info) | |
527 | { | |
528 | error ("An indirect edge from %s is not marked as indirect or has " | |
529 | "associated indirect_info, the corresponding statement is: ", | |
530 | identifier_to_locale (cgraph_node_name (e->caller))); | |
7b29dd2f | 531 | cgraph_debug_gimple_stmt (this_cfun, e->call_stmt); |
799c8711 | 532 | error_found = true; |
533 | } | |
534 | } | |
b0cdf642 | 535 | for (e = node->callers; e; e = e->next_caller) |
536 | { | |
1a036a3b | 537 | if (verify_edge_count_and_frequency (e)) |
538 | error_found = true; | |
b0cdf642 | 539 | if (!e->inline_failed) |
540 | { | |
541 | if (node->global.inlined_to | |
542 | != (e->caller->global.inlined_to | |
543 | ? e->caller->global.inlined_to : e->caller)) | |
544 | { | |
0a81f5a0 | 545 | error ("inlined_to pointer is wrong"); |
b0cdf642 | 546 | error_found = true; |
547 | } | |
548 | if (node->callers->next_caller) | |
549 | { | |
0a81f5a0 | 550 | error ("multiple inline callers"); |
b0cdf642 | 551 | error_found = true; |
552 | } | |
553 | } | |
554 | else | |
555 | if (node->global.inlined_to) | |
556 | { | |
0a81f5a0 | 557 | error ("inlined_to pointer set for noninline callers"); |
b0cdf642 | 558 | error_found = true; |
559 | } | |
560 | } | |
1a036a3b | 561 | for (e = node->indirect_calls; e; e = e->next_callee) |
562 | if (verify_edge_count_and_frequency (e)) | |
563 | error_found = true; | |
b0cdf642 | 564 | if (!node->callers && node->global.inlined_to) |
565 | { | |
5cd75817 | 566 | error ("inlined_to pointer is set but no predecessors found"); |
b0cdf642 | 567 | error_found = true; |
568 | } | |
569 | if (node->global.inlined_to == node) | |
570 | { | |
0a81f5a0 | 571 | error ("inlined_to pointer refers to itself"); |
b0cdf642 | 572 | error_found = true; |
573 | } | |
574 | ||
7019fd3f | 575 | if (!cgraph_get_node (node->decl)) |
b0cdf642 | 576 | { |
0f6439b9 | 577 | error ("node not found in cgraph_hash"); |
b0cdf642 | 578 | error_found = true; |
579 | } | |
a0c938f0 | 580 | |
ccf4ab6b | 581 | if (node->clone_of) |
582 | { | |
583 | struct cgraph_node *n; | |
584 | for (n = node->clone_of->clones; n; n = n->next_sibling_clone) | |
585 | if (n == node) | |
586 | break; | |
587 | if (!n) | |
588 | { | |
589 | error ("node has wrong clone_of"); | |
590 | error_found = true; | |
591 | } | |
592 | } | |
593 | if (node->clones) | |
594 | { | |
595 | struct cgraph_node *n; | |
596 | for (n = node->clones; n; n = n->next_sibling_clone) | |
597 | if (n->clone_of != node) | |
598 | break; | |
599 | if (n) | |
600 | { | |
601 | error ("node has wrong clone list"); | |
602 | error_found = true; | |
603 | } | |
604 | } | |
605 | if ((node->prev_sibling_clone || node->next_sibling_clone) && !node->clone_of) | |
606 | { | |
607 | error ("node is in clone list but it is not clone"); | |
608 | error_found = true; | |
609 | } | |
610 | if (!node->prev_sibling_clone && node->clone_of && node->clone_of->clones != node) | |
611 | { | |
612 | error ("node has wrong prev_clone pointer"); | |
613 | error_found = true; | |
614 | } | |
615 | if (node->prev_sibling_clone && node->prev_sibling_clone->next_sibling_clone != node) | |
616 | { | |
617 | error ("double linked list of clones corrupted"); | |
618 | error_found = true; | |
619 | } | |
c524ac5d | 620 | if (node->same_comdat_group) |
621 | { | |
622 | struct cgraph_node *n = node->same_comdat_group; | |
623 | ||
624 | if (!DECL_ONE_ONLY (node->decl)) | |
625 | { | |
626 | error ("non-DECL_ONE_ONLY node in a same_comdat_group list"); | |
627 | error_found = true; | |
628 | } | |
629 | if (n == node) | |
630 | { | |
631 | error ("node is alone in a comdat group"); | |
632 | error_found = true; | |
633 | } | |
634 | do | |
635 | { | |
636 | if (!n->same_comdat_group) | |
637 | { | |
638 | error ("same_comdat_group is not a circular list"); | |
639 | error_found = true; | |
640 | break; | |
641 | } | |
642 | n = n->same_comdat_group; | |
643 | } | |
644 | while (n != node); | |
645 | } | |
ccf4ab6b | 646 | |
c70f46b0 | 647 | if (node->analyzed && node->alias) |
648 | { | |
649 | bool ref_found = false; | |
650 | int i; | |
651 | struct ipa_ref *ref; | |
652 | ||
653 | if (node->callees) | |
654 | { | |
655 | error ("Alias has call edges"); | |
656 | error_found = true; | |
657 | } | |
658 | for (i = 0; ipa_ref_list_reference_iterate (&node->ref_list, i, ref); i++) | |
659 | if (ref->use != IPA_REF_ALIAS) | |
660 | { | |
661 | error ("Alias has non-alias refernece"); | |
662 | error_found = true; | |
663 | } | |
664 | else if (ref_found) | |
665 | { | |
666 | error ("Alias has more than one alias reference"); | |
667 | error_found = true; | |
668 | } | |
669 | else | |
670 | ref_found = true; | |
671 | if (!ref_found) | |
672 | { | |
673 | error ("Analyzed alias has no reference"); | |
674 | error_found = true; | |
675 | } | |
676 | } | |
91bf9d9a | 677 | if (node->analyzed && node->thunk.thunk_p) |
678 | { | |
679 | if (!node->callees) | |
680 | { | |
681 | error ("No edge out of thunk node"); | |
682 | error_found = true; | |
683 | } | |
684 | else if (node->callees->next_callee) | |
685 | { | |
686 | error ("More than one edge out of thunk node"); | |
687 | error_found = true; | |
688 | } | |
689 | if (gimple_has_body_p (node->decl)) | |
690 | { | |
691 | error ("Thunk is not supposed to have body"); | |
692 | error_found = true; | |
693 | } | |
694 | } | |
695 | else if (node->analyzed && gimple_has_body_p (node->decl) | |
696 | && !TREE_ASM_WRITTEN (node->decl) | |
697 | && (!DECL_EXTERNAL (node->decl) || node->global.inlined_to) | |
698 | && !flag_wpa) | |
b0cdf642 | 699 | { |
e27482aa | 700 | if (this_cfun->cfg) |
701 | { | |
702 | /* The nodes we're interested in are never shared, so walk | |
703 | the tree ignoring duplicates. */ | |
e7c352d1 | 704 | struct pointer_set_t *visited_nodes = pointer_set_create (); |
e27482aa | 705 | /* Reach the trees by walking over the CFG, and note the |
706 | enclosing basic-blocks in the call edges. */ | |
707 | FOR_EACH_BB_FN (this_block, this_cfun) | |
75a70cf9 | 708 | for (gsi = gsi_start_bb (this_block); |
709 | !gsi_end_p (gsi); | |
710 | gsi_next (&gsi)) | |
9bfec7c2 | 711 | { |
75a70cf9 | 712 | gimple stmt = gsi_stmt (gsi); |
799c8711 | 713 | if (is_gimple_call (stmt)) |
9bfec7c2 | 714 | { |
715 | struct cgraph_edge *e = cgraph_edge (node, stmt); | |
799c8711 | 716 | tree decl = gimple_call_fndecl (stmt); |
9bfec7c2 | 717 | if (e) |
718 | { | |
719 | if (e->aux) | |
720 | { | |
0a81f5a0 | 721 | error ("shared call_stmt:"); |
7b29dd2f | 722 | cgraph_debug_gimple_stmt (this_cfun, stmt); |
9bfec7c2 | 723 | error_found = true; |
724 | } | |
799c8711 | 725 | if (!e->indirect_unknown_callee) |
28454517 | 726 | { |
2f9d66d3 | 727 | if (verify_edge_corresponds_to_fndecl (e, decl)) |
799c8711 | 728 | { |
729 | error ("edge points to wrong declaration:"); | |
730 | debug_tree (e->callee->decl); | |
731 | fprintf (stderr," Instead of:"); | |
732 | debug_tree (decl); | |
733 | error_found = true; | |
734 | } | |
28454517 | 735 | } |
799c8711 | 736 | else if (decl) |
9bfec7c2 | 737 | { |
799c8711 | 738 | error ("an indirect edge with unknown callee " |
739 | "corresponding to a call_stmt with " | |
740 | "a known declaration:"); | |
ee3f5fc0 | 741 | error_found = true; |
7b29dd2f | 742 | cgraph_debug_gimple_stmt (this_cfun, e->call_stmt); |
9bfec7c2 | 743 | } |
744 | e->aux = (void *)1; | |
745 | } | |
799c8711 | 746 | else if (decl) |
9bfec7c2 | 747 | { |
0a81f5a0 | 748 | error ("missing callgraph edge for call stmt:"); |
7b29dd2f | 749 | cgraph_debug_gimple_stmt (this_cfun, stmt); |
9bfec7c2 | 750 | error_found = true; |
751 | } | |
752 | } | |
753 | } | |
e27482aa | 754 | pointer_set_destroy (visited_nodes); |
e27482aa | 755 | } |
756 | else | |
757 | /* No CFG available?! */ | |
758 | gcc_unreachable (); | |
759 | ||
b0cdf642 | 760 | for (e = node->callees; e; e = e->next_callee) |
761 | { | |
799c8711 | 762 | if (!e->aux) |
b0cdf642 | 763 | { |
0a81f5a0 | 764 | error ("edge %s->%s has no corresponding call_stmt", |
abd3e6b5 | 765 | identifier_to_locale (cgraph_node_name (e->caller)), |
766 | identifier_to_locale (cgraph_node_name (e->callee))); | |
7b29dd2f | 767 | cgraph_debug_gimple_stmt (this_cfun, e->call_stmt); |
b0cdf642 | 768 | error_found = true; |
769 | } | |
770 | e->aux = 0; | |
771 | } | |
799c8711 | 772 | for (e = node->indirect_calls; e; e = e->next_callee) |
773 | { | |
774 | if (!e->aux) | |
775 | { | |
776 | error ("an indirect edge from %s has no corresponding call_stmt", | |
777 | identifier_to_locale (cgraph_node_name (e->caller))); | |
7b29dd2f | 778 | cgraph_debug_gimple_stmt (this_cfun, e->call_stmt); |
799c8711 | 779 | error_found = true; |
780 | } | |
781 | e->aux = 0; | |
782 | } | |
b0cdf642 | 783 | } |
784 | if (error_found) | |
785 | { | |
786 | dump_cgraph_node (stderr, node); | |
0a81f5a0 | 787 | internal_error ("verify_cgraph_node failed"); |
b0cdf642 | 788 | } |
789 | timevar_pop (TV_CGRAPH_VERIFY); | |
790 | } | |
791 | ||
792 | /* Verify whole cgraph structure. */ | |
4b987fac | 793 | DEBUG_FUNCTION void |
b0cdf642 | 794 | verify_cgraph (void) |
795 | { | |
796 | struct cgraph_node *node; | |
797 | ||
852f689e | 798 | if (seen_error ()) |
8ec2a798 | 799 | return; |
800 | ||
b0cdf642 | 801 | for (node = cgraph_nodes; node; node = node->next) |
802 | verify_cgraph_node (node); | |
803 | } | |
804 | ||
56af936e | 805 | /* Output all asm statements we have stored up to be output. */ |
806 | ||
807 | static void | |
808 | cgraph_output_pending_asms (void) | |
809 | { | |
810 | struct cgraph_asm_node *can; | |
811 | ||
852f689e | 812 | if (seen_error ()) |
56af936e | 813 | return; |
814 | ||
815 | for (can = cgraph_asm_nodes; can; can = can->next) | |
816 | assemble_asm (can->asm_str); | |
817 | cgraph_asm_nodes = NULL; | |
818 | } | |
819 | ||
0785e435 | 820 | /* Analyze the function scheduled to be output. */ |
222bc9b9 | 821 | void |
0785e435 | 822 | cgraph_analyze_function (struct cgraph_node *node) |
823 | { | |
bfec3452 | 824 | tree save = current_function_decl; |
0785e435 | 825 | tree decl = node->decl; |
826 | ||
c70f46b0 | 827 | if (node->alias && node->thunk.alias) |
828 | { | |
829 | struct cgraph_node *tgt = cgraph_get_node (node->thunk.alias); | |
830 | if (!VEC_length (ipa_ref_t, node->ref_list.references)) | |
831 | ipa_record_reference (node, NULL, tgt, NULL, IPA_REF_ALIAS, NULL); | |
832 | if (node->same_body_alias) | |
833 | { | |
834 | DECL_VIRTUAL_P (node->decl) = DECL_VIRTUAL_P (node->thunk.alias); | |
835 | DECL_DECLARED_INLINE_P (node->decl) | |
836 | = DECL_DECLARED_INLINE_P (node->thunk.alias); | |
837 | DECL_DISREGARD_INLINE_LIMITS (node->decl) | |
838 | = DECL_DISREGARD_INLINE_LIMITS (node->thunk.alias); | |
839 | } | |
840 | ||
841 | /* Fixup visibility nonsences C++ frontend produce on same body aliases. */ | |
842 | if (TREE_PUBLIC (node->decl) && node->same_body_alias) | |
843 | { | |
844 | DECL_EXTERNAL (node->decl) = DECL_EXTERNAL (node->thunk.alias); | |
89bf5ca9 | 845 | if (DECL_ONE_ONLY (node->thunk.alias)) |
c70f46b0 | 846 | { |
89bf5ca9 | 847 | DECL_COMDAT (node->decl) = DECL_COMDAT (node->thunk.alias); |
c70f46b0 | 848 | DECL_COMDAT_GROUP (node->decl) = DECL_COMDAT_GROUP (node->thunk.alias); |
849 | if (DECL_ONE_ONLY (node->thunk.alias) && !node->same_comdat_group) | |
850 | { | |
851 | struct cgraph_node *tgt = cgraph_get_node (node->thunk.alias); | |
852 | node->same_comdat_group = tgt; | |
853 | if (!tgt->same_comdat_group) | |
854 | tgt->same_comdat_group = node; | |
855 | else | |
856 | { | |
857 | struct cgraph_node *n; | |
858 | for (n = tgt->same_comdat_group; | |
859 | n->same_comdat_group != tgt; | |
860 | n = n->same_comdat_group) | |
861 | ; | |
862 | n->same_comdat_group = node; | |
863 | } | |
864 | } | |
865 | } | |
866 | } | |
867 | cgraph_mark_reachable_node (cgraph_alias_aliased_node (node)); | |
868 | if (node->address_taken) | |
869 | cgraph_mark_address_taken_node (cgraph_alias_aliased_node (node)); | |
870 | if (cgraph_decide_is_function_needed (node, node->decl)) | |
871 | cgraph_mark_needed_node (node); | |
872 | } | |
873 | else if (node->thunk.thunk_p) | |
91bf9d9a | 874 | { |
875 | cgraph_create_edge (node, cgraph_get_node (node->thunk.alias), | |
876 | NULL, 0, CGRAPH_FREQ_BASE); | |
877 | } | |
878 | else | |
879 | { | |
880 | current_function_decl = decl; | |
881 | push_cfun (DECL_STRUCT_FUNCTION (decl)); | |
bfec3452 | 882 | |
91bf9d9a | 883 | assign_assembler_name_if_neeeded (node->decl); |
6816d0c4 | 884 | |
91bf9d9a | 885 | /* Make sure to gimplify bodies only once. During analyzing a |
886 | function we lower it, which will require gimplified nested | |
887 | functions, so we can end up here with an already gimplified | |
888 | body. */ | |
889 | if (!gimple_body (decl)) | |
890 | gimplify_function_tree (decl); | |
891 | dump_function (TDI_generic, decl); | |
bfec3452 | 892 | |
91bf9d9a | 893 | cgraph_lower_function (node); |
894 | pop_cfun (); | |
895 | } | |
6e8d6e86 | 896 | node->analyzed = true; |
0785e435 | 897 | |
bfec3452 | 898 | current_function_decl = save; |
0785e435 | 899 | } |
900 | ||
c70f46b0 | 901 | /* C++ frontend produce same body aliases all over the place, even before PCH |
902 | gets streamed out. It relies on us linking the aliases with their function | |
903 | in order to do the fixups, but ipa-ref is not PCH safe. Consequentely we | |
904 | first produce aliases without links, but once C++ FE is sure he won't sream | |
905 | PCH we build the links via this function. */ | |
906 | ||
907 | void | |
908 | cgraph_process_same_body_aliases (void) | |
909 | { | |
910 | struct cgraph_node *node; | |
911 | for (node = cgraph_nodes; node; node = node->next) | |
912 | if (node->same_body_alias | |
913 | && !VEC_length (ipa_ref_t, node->ref_list.references)) | |
914 | { | |
915 | struct cgraph_node *tgt = cgraph_get_node (node->thunk.alias); | |
916 | ipa_record_reference (node, NULL, tgt, NULL, IPA_REF_ALIAS, NULL); | |
917 | } | |
918 | same_body_aliases_done = true; | |
919 | } | |
920 | ||
d05db70d | 921 | /* Process attributes common for vars and functions. */ |
922 | ||
923 | static void | |
924 | process_common_attributes (tree decl) | |
925 | { | |
926 | tree weakref = lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)); | |
927 | ||
928 | if (weakref && !lookup_attribute ("alias", DECL_ATTRIBUTES (decl))) | |
929 | { | |
930 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wattributes, | |
931 | "%<weakref%> attribute should be accompanied with" | |
932 | " an %<alias%> attribute"); | |
933 | DECL_WEAK (decl) = 0; | |
40b32d93 | 934 | DECL_ATTRIBUTES (decl) = remove_attribute ("weakref", |
935 | DECL_ATTRIBUTES (decl)); | |
d05db70d | 936 | } |
937 | } | |
938 | ||
05806473 | 939 | /* Look for externally_visible and used attributes and mark cgraph nodes |
940 | accordingly. | |
941 | ||
942 | We cannot mark the nodes at the point the attributes are processed (in | |
943 | handle_*_attribute) because the copy of the declarations available at that | |
944 | point may not be canonical. For example, in: | |
945 | ||
946 | void f(); | |
947 | void f() __attribute__((used)); | |
948 | ||
949 | the declaration we see in handle_used_attribute will be the second | |
950 | declaration -- but the front end will subsequently merge that declaration | |
951 | with the original declaration and discard the second declaration. | |
952 | ||
953 | Furthermore, we can't mark these nodes in cgraph_finalize_function because: | |
954 | ||
955 | void f() {} | |
956 | void f() __attribute__((externally_visible)); | |
957 | ||
958 | is valid. | |
959 | ||
960 | So, we walk the nodes at the end of the translation unit, applying the | |
961 | attributes at that point. */ | |
962 | ||
963 | static void | |
964 | process_function_and_variable_attributes (struct cgraph_node *first, | |
1d416bd7 | 965 | struct varpool_node *first_var) |
05806473 | 966 | { |
967 | struct cgraph_node *node; | |
1d416bd7 | 968 | struct varpool_node *vnode; |
05806473 | 969 | |
970 | for (node = cgraph_nodes; node != first; node = node->next) | |
971 | { | |
972 | tree decl = node->decl; | |
83a23b05 | 973 | if (DECL_PRESERVE_P (decl)) |
0b49f8f8 | 974 | cgraph_mark_needed_node (node); |
62433d51 | 975 | if (TARGET_DLLIMPORT_DECL_ATTRIBUTES |
976 | && lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)) | |
977 | && TREE_PUBLIC (node->decl)) | |
978 | { | |
979 | if (node->local.finalized) | |
980 | cgraph_mark_needed_node (node); | |
981 | } | |
982 | else if (lookup_attribute ("externally_visible", DECL_ATTRIBUTES (decl))) | |
05806473 | 983 | { |
ba12ea31 | 984 | if (! TREE_PUBLIC (node->decl)) |
712d2297 | 985 | warning_at (DECL_SOURCE_LOCATION (node->decl), OPT_Wattributes, |
986 | "%<externally_visible%>" | |
987 | " attribute have effect only on public objects"); | |
59dd4830 | 988 | else if (node->local.finalized) |
989 | cgraph_mark_needed_node (node); | |
05806473 | 990 | } |
40b32d93 | 991 | if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
c70f46b0 | 992 | && (node->local.finalized && !node->alias)) |
40b32d93 | 993 | { |
994 | warning_at (DECL_SOURCE_LOCATION (node->decl), OPT_Wattributes, | |
995 | "%<weakref%> attribute ignored" | |
996 | " because function is defined"); | |
997 | DECL_WEAK (decl) = 0; | |
998 | DECL_ATTRIBUTES (decl) = remove_attribute ("weakref", | |
999 | DECL_ATTRIBUTES (decl)); | |
1000 | } | |
a522e9eb | 1001 | |
1002 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (decl)) | |
1003 | && !DECL_DECLARED_INLINE_P (decl) | |
1004 | /* redefining extern inline function makes it DECL_UNINLINABLE. */ | |
1005 | && !DECL_UNINLINABLE (decl)) | |
1006 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wattributes, | |
1007 | "always_inline function might not be inlinable"); | |
1008 | ||
d05db70d | 1009 | process_common_attributes (decl); |
05806473 | 1010 | } |
1d416bd7 | 1011 | for (vnode = varpool_nodes; vnode != first_var; vnode = vnode->next) |
05806473 | 1012 | { |
1013 | tree decl = vnode->decl; | |
83a23b05 | 1014 | if (DECL_PRESERVE_P (decl)) |
05806473 | 1015 | { |
22671757 | 1016 | vnode->force_output = true; |
05806473 | 1017 | if (vnode->finalized) |
1d416bd7 | 1018 | varpool_mark_needed_node (vnode); |
05806473 | 1019 | } |
62433d51 | 1020 | if (TARGET_DLLIMPORT_DECL_ATTRIBUTES |
1021 | && lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)) | |
0d9d5d69 | 1022 | && TREE_PUBLIC (vnode->decl)) |
62433d51 | 1023 | { |
1024 | if (vnode->finalized) | |
1025 | varpool_mark_needed_node (vnode); | |
1026 | } | |
1027 | else if (lookup_attribute ("externally_visible", DECL_ATTRIBUTES (decl))) | |
05806473 | 1028 | { |
ba12ea31 | 1029 | if (! TREE_PUBLIC (vnode->decl)) |
712d2297 | 1030 | warning_at (DECL_SOURCE_LOCATION (vnode->decl), OPT_Wattributes, |
1031 | "%<externally_visible%>" | |
1032 | " attribute have effect only on public objects"); | |
59dd4830 | 1033 | else if (vnode->finalized) |
1034 | varpool_mark_needed_node (vnode); | |
05806473 | 1035 | } |
40b32d93 | 1036 | if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
1037 | && vnode->finalized | |
1038 | && DECL_INITIAL (decl)) | |
1039 | { | |
1040 | warning_at (DECL_SOURCE_LOCATION (vnode->decl), OPT_Wattributes, | |
1041 | "%<weakref%> attribute ignored" | |
1042 | " because variable is initialized"); | |
1043 | DECL_WEAK (decl) = 0; | |
1044 | DECL_ATTRIBUTES (decl) = remove_attribute ("weakref", | |
1045 | DECL_ATTRIBUTES (decl)); | |
1046 | } | |
d05db70d | 1047 | process_common_attributes (decl); |
05806473 | 1048 | } |
1049 | } | |
1050 | ||
aeeb194b | 1051 | /* Process CGRAPH_NODES_NEEDED queue, analyze each function (and transitively |
1052 | each reachable functions) and build cgraph. | |
1053 | The function can be called multiple times after inserting new nodes | |
0d424440 | 1054 | into beginning of queue. Just the new part of queue is re-scanned then. */ |
ae01b312 | 1055 | |
aeeb194b | 1056 | static void |
1057 | cgraph_analyze_functions (void) | |
ae01b312 | 1058 | { |
c1dcd13c | 1059 | /* Keep track of already processed nodes when called multiple times for |
06b27565 | 1060 | intermodule optimization. */ |
c1dcd13c | 1061 | static struct cgraph_node *first_analyzed; |
c17d0de1 | 1062 | struct cgraph_node *first_processed = first_analyzed; |
1d416bd7 | 1063 | static struct varpool_node *first_analyzed_var; |
aeeb194b | 1064 | struct cgraph_node *node, *next; |
ae01b312 | 1065 | |
f1c35659 | 1066 | bitmap_obstack_initialize (NULL); |
c17d0de1 | 1067 | process_function_and_variable_attributes (first_processed, |
1068 | first_analyzed_var); | |
1069 | first_processed = cgraph_nodes; | |
1d416bd7 | 1070 | first_analyzed_var = varpool_nodes; |
1071 | varpool_analyze_pending_decls (); | |
f79b6507 | 1072 | if (cgraph_dump_file) |
ae01b312 | 1073 | { |
e4200070 | 1074 | fprintf (cgraph_dump_file, "Initial entry points:"); |
c1dcd13c | 1075 | for (node = cgraph_nodes; node != first_analyzed; node = node->next) |
1a1a827a | 1076 | if (node->needed) |
f79b6507 | 1077 | fprintf (cgraph_dump_file, " %s", cgraph_node_name (node)); |
1078 | fprintf (cgraph_dump_file, "\n"); | |
ae01b312 | 1079 | } |
aeeb194b | 1080 | cgraph_process_new_functions (); |
ae01b312 | 1081 | |
e6d2b2d8 | 1082 | /* Propagate reachability flag and lower representation of all reachable |
1083 | functions. In the future, lowering will introduce new functions and | |
1084 | new entry points on the way (by template instantiation and virtual | |
1085 | method table generation for instance). */ | |
3d7bfc56 | 1086 | while (cgraph_nodes_queue) |
ae01b312 | 1087 | { |
0785e435 | 1088 | struct cgraph_edge *edge; |
3d7bfc56 | 1089 | tree decl = cgraph_nodes_queue->decl; |
1090 | ||
1091 | node = cgraph_nodes_queue; | |
d87976fb | 1092 | cgraph_nodes_queue = cgraph_nodes_queue->next_needed; |
b0cdf642 | 1093 | node->next_needed = NULL; |
ae01b312 | 1094 | |
638531ad | 1095 | /* ??? It is possible to create extern inline function and later using |
bbd5cba2 | 1096 | weak alias attribute to kill its body. See |
638531ad | 1097 | gcc.c-torture/compile/20011119-1.c */ |
91bf9d9a | 1098 | if (!DECL_STRUCT_FUNCTION (decl) |
c70f46b0 | 1099 | && (!node->alias || !node->thunk.alias) |
91bf9d9a | 1100 | && !node->thunk.thunk_p) |
9b8fb23a | 1101 | { |
1102 | cgraph_reset_node (node); | |
443089c1 | 1103 | node->local.redefined_extern_inline = true; |
9b8fb23a | 1104 | continue; |
1105 | } | |
638531ad | 1106 | |
7bfefa9d | 1107 | if (!node->analyzed) |
1108 | cgraph_analyze_function (node); | |
2c0b522d | 1109 | |
ae01b312 | 1110 | for (edge = node->callees; edge; edge = edge->next_callee) |
0785e435 | 1111 | if (!edge->callee->reachable) |
2c0b522d | 1112 | cgraph_mark_reachable_node (edge->callee); |
91bf9d9a | 1113 | for (edge = node->callers; edge; edge = edge->next_caller) |
1114 | if (!edge->caller->reachable && edge->caller->thunk.thunk_p) | |
1115 | cgraph_mark_reachable_node (edge->caller); | |
2c0b522d | 1116 | |
61c2c7b1 | 1117 | if (node->same_comdat_group) |
1118 | { | |
1119 | for (next = node->same_comdat_group; | |
1120 | next != node; | |
1121 | next = next->same_comdat_group) | |
1122 | cgraph_mark_reachable_node (next); | |
1123 | } | |
1124 | ||
d544ceff | 1125 | /* If decl is a clone of an abstract function, mark that abstract |
1126 | function so that we don't release its body. The DECL_INITIAL() of that | |
fd6a3c41 | 1127 | abstract function declaration will be later needed to output debug |
1128 | info. */ | |
d544ceff | 1129 | if (DECL_ABSTRACT_ORIGIN (decl)) |
1130 | { | |
fd6a3c41 | 1131 | struct cgraph_node *origin_node; |
1132 | origin_node = cgraph_get_node (DECL_ABSTRACT_ORIGIN (decl)); | |
d544ceff | 1133 | origin_node->abstract_and_needed = true; |
1134 | } | |
1135 | ||
c17d0de1 | 1136 | /* We finalize local static variables during constructing callgraph |
1137 | edges. Process their attributes too. */ | |
1138 | process_function_and_variable_attributes (first_processed, | |
1139 | first_analyzed_var); | |
1140 | first_processed = cgraph_nodes; | |
1d416bd7 | 1141 | first_analyzed_var = varpool_nodes; |
1142 | varpool_analyze_pending_decls (); | |
aeeb194b | 1143 | cgraph_process_new_functions (); |
ae01b312 | 1144 | } |
2c0b522d | 1145 | |
aa5e06c7 | 1146 | /* Collect entry points to the unit. */ |
f79b6507 | 1147 | if (cgraph_dump_file) |
3d7bfc56 | 1148 | { |
e4200070 | 1149 | fprintf (cgraph_dump_file, "Unit entry points:"); |
c1dcd13c | 1150 | for (node = cgraph_nodes; node != first_analyzed; node = node->next) |
1a1a827a | 1151 | if (node->needed) |
f79b6507 | 1152 | fprintf (cgraph_dump_file, " %s", cgraph_node_name (node)); |
e4200070 | 1153 | fprintf (cgraph_dump_file, "\n\nInitial "); |
0785e435 | 1154 | dump_cgraph (cgraph_dump_file); |
7410370b | 1155 | dump_varpool (cgraph_dump_file); |
3d7bfc56 | 1156 | } |
e6d2b2d8 | 1157 | |
f79b6507 | 1158 | if (cgraph_dump_file) |
1159 | fprintf (cgraph_dump_file, "\nReclaiming functions:"); | |
ae01b312 | 1160 | |
f4ec5ce1 | 1161 | for (node = cgraph_nodes; node != first_analyzed; node = next) |
ae01b312 | 1162 | { |
1163 | tree decl = node->decl; | |
f4ec5ce1 | 1164 | next = node->next; |
ae01b312 | 1165 | |
91bf9d9a | 1166 | if (node->local.finalized && !gimple_has_body_p (decl) |
c70f46b0 | 1167 | && (!node->alias || !node->thunk.alias) |
91bf9d9a | 1168 | && !node->thunk.thunk_p) |
a0c938f0 | 1169 | cgraph_reset_node (node); |
9b8fb23a | 1170 | |
91bf9d9a | 1171 | if (!node->reachable |
c70f46b0 | 1172 | && (gimple_has_body_p (decl) || node->thunk.thunk_p |
1173 | || (node->alias && node->thunk.alias))) | |
ae01b312 | 1174 | { |
f79b6507 | 1175 | if (cgraph_dump_file) |
1176 | fprintf (cgraph_dump_file, " %s", cgraph_node_name (node)); | |
b0cdf642 | 1177 | cgraph_remove_node (node); |
9b8fb23a | 1178 | continue; |
ae01b312 | 1179 | } |
bc5cab3b | 1180 | else |
1181 | node->next_needed = NULL; | |
91bf9d9a | 1182 | gcc_assert (!node->local.finalized || node->thunk.thunk_p |
c70f46b0 | 1183 | || node->alias |
91bf9d9a | 1184 | || gimple_has_body_p (decl)); |
9b8fb23a | 1185 | gcc_assert (node->analyzed == node->local.finalized); |
ae01b312 | 1186 | } |
f79b6507 | 1187 | if (cgraph_dump_file) |
e4200070 | 1188 | { |
1189 | fprintf (cgraph_dump_file, "\n\nReclaimed "); | |
1190 | dump_cgraph (cgraph_dump_file); | |
7410370b | 1191 | dump_varpool (cgraph_dump_file); |
e4200070 | 1192 | } |
f1c35659 | 1193 | bitmap_obstack_release (NULL); |
c1dcd13c | 1194 | first_analyzed = cgraph_nodes; |
ae01b312 | 1195 | ggc_collect (); |
aeeb194b | 1196 | } |
1197 | ||
3a849bc1 | 1198 | /* Translate the ugly representation of aliases as alias pairs into nice |
1199 | representation in callgraph. We don't handle all cases yet, | |
1200 | unforutnately. */ | |
1201 | ||
1202 | static void | |
1203 | handle_alias_pairs (void) | |
1204 | { | |
1205 | alias_pair *p; | |
1206 | unsigned i; | |
1207 | struct cgraph_node *target_node; | |
1208 | struct cgraph_node *src_node; | |
e0eaac80 | 1209 | struct varpool_node *target_vnode; |
3a849bc1 | 1210 | |
1211 | for (i = 0; VEC_iterate (alias_pair, alias_pairs, i, p);) | |
1212 | { | |
1213 | if (TREE_CODE (p->decl) == FUNCTION_DECL | |
1214 | && !lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)) | |
1215 | && (target_node = cgraph_node_for_asm (p->target)) != NULL) | |
1216 | { | |
1217 | src_node = cgraph_get_node (p->decl); | |
1218 | if (src_node && src_node->local.finalized) | |
1219 | cgraph_reset_node (src_node); | |
1220 | /* Normally EXTERNAL flag is used to mark external inlines, | |
1221 | however for aliases it seems to be allowed to use it w/o | |
1222 | any meaning. See gcc.dg/attr-alias-3.c | |
1223 | However for weakref we insist on EXTERNAL flag being set. | |
1224 | See gcc.dg/attr-alias-5.c */ | |
1225 | if (DECL_EXTERNAL (p->decl)) | |
1226 | DECL_EXTERNAL (p->decl) = 0; | |
1227 | cgraph_create_function_alias (p->decl, target_node->decl); | |
1228 | VEC_unordered_remove (alias_pair, alias_pairs, i); | |
1229 | } | |
e0eaac80 | 1230 | else if (TREE_CODE (p->decl) == VAR_DECL |
1231 | && !lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)) | |
1232 | && (target_vnode = varpool_node_for_asm (p->target)) != NULL) | |
1233 | { | |
1234 | /* Normally EXTERNAL flag is used to mark external inlines, | |
1235 | however for aliases it seems to be allowed to use it w/o | |
1236 | any meaning. See gcc.dg/attr-alias-3.c | |
1237 | However for weakref we insist on EXTERNAL flag being set. | |
1238 | See gcc.dg/attr-alias-5.c */ | |
1239 | if (DECL_EXTERNAL (p->decl)) | |
1240 | DECL_EXTERNAL (p->decl) = 0; | |
1241 | varpool_create_variable_alias (p->decl, target_vnode->decl); | |
1242 | VEC_unordered_remove (alias_pair, alias_pairs, i); | |
1243 | } | |
3a849bc1 | 1244 | else |
1245 | { | |
1246 | if (dump_file) | |
1247 | fprintf (dump_file, "Unhandled alias %s->%s\n", | |
1248 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (p->decl)), | |
1249 | IDENTIFIER_POINTER (p->target)); | |
1250 | ||
1251 | i++; | |
1252 | } | |
1253 | } | |
1254 | } | |
1255 | ||
8f69fd82 | 1256 | |
aeeb194b | 1257 | /* Analyze the whole compilation unit once it is parsed completely. */ |
1258 | ||
1259 | void | |
1260 | cgraph_finalize_compilation_unit (void) | |
1261 | { | |
9929334e | 1262 | timevar_push (TV_CGRAPH); |
1263 | ||
a0605d65 | 1264 | /* If LTO is enabled, initialize the streamer hooks needed by GIMPLE. */ |
1265 | if (flag_lto) | |
1266 | lto_streamer_hooks_init (); | |
1267 | ||
bb903e9c | 1268 | /* If we're here there's no current function anymore. Some frontends |
1269 | are lazy in clearing these. */ | |
1270 | current_function_decl = NULL; | |
1271 | set_cfun (NULL); | |
1272 | ||
bfec3452 | 1273 | /* Do not skip analyzing the functions if there were errors, we |
1274 | miss diagnostics for following functions otherwise. */ | |
aeeb194b | 1275 | |
8f69fd82 | 1276 | /* Emit size functions we didn't inline. */ |
4189e677 | 1277 | finalize_size_functions (); |
8f69fd82 | 1278 | |
9929334e | 1279 | /* Mark alias targets necessary and emit diagnostics. */ |
1280 | finish_aliases_1 (); | |
3a849bc1 | 1281 | handle_alias_pairs (); |
9929334e | 1282 | |
aeeb194b | 1283 | if (!quiet_flag) |
1284 | { | |
1285 | fprintf (stderr, "\nAnalyzing compilation unit\n"); | |
1286 | fflush (stderr); | |
1287 | } | |
1288 | ||
ec4791a8 | 1289 | if (flag_dump_passes) |
1290 | dump_passes (); | |
1291 | ||
9929334e | 1292 | /* Gimplify and lower all functions, compute reachability and |
1293 | remove unreachable nodes. */ | |
1294 | cgraph_analyze_functions (); | |
1295 | ||
8f69fd82 | 1296 | /* Mark alias targets necessary and emit diagnostics. */ |
1297 | finish_aliases_1 (); | |
3a849bc1 | 1298 | handle_alias_pairs (); |
8f69fd82 | 1299 | |
9929334e | 1300 | /* Gimplify and lower thunks. */ |
aeeb194b | 1301 | cgraph_analyze_functions (); |
bfec3452 | 1302 | |
9929334e | 1303 | /* Finally drive the pass manager. */ |
bfec3452 | 1304 | cgraph_optimize (); |
9929334e | 1305 | |
1306 | timevar_pop (TV_CGRAPH); | |
ae01b312 | 1307 | } |
9ed5b1f5 | 1308 | |
1309 | ||
ae01b312 | 1310 | /* Figure out what functions we want to assemble. */ |
1311 | ||
1312 | static void | |
d9d9733a | 1313 | cgraph_mark_functions_to_output (void) |
ae01b312 | 1314 | { |
1315 | struct cgraph_node *node; | |
61c2c7b1 | 1316 | #ifdef ENABLE_CHECKING |
1317 | bool check_same_comdat_groups = false; | |
1318 | ||
1319 | for (node = cgraph_nodes; node; node = node->next) | |
1320 | gcc_assert (!node->process); | |
1321 | #endif | |
ae01b312 | 1322 | |
ae01b312 | 1323 | for (node = cgraph_nodes; node; node = node->next) |
1324 | { | |
1325 | tree decl = node->decl; | |
d7c6d889 | 1326 | struct cgraph_edge *e; |
a0c938f0 | 1327 | |
61c2c7b1 | 1328 | gcc_assert (!node->process || node->same_comdat_group); |
1329 | if (node->process) | |
1330 | continue; | |
d7c6d889 | 1331 | |
1332 | for (e = node->callers; e; e = e->next_caller) | |
611e5405 | 1333 | if (e->inline_failed) |
d7c6d889 | 1334 | break; |
ae01b312 | 1335 | |
e6d2b2d8 | 1336 | /* We need to output all local functions that are used and not |
1337 | always inlined, as well as those that are reachable from | |
1338 | outside the current compilation unit. */ | |
1a1a827a | 1339 | if (node->analyzed |
91bf9d9a | 1340 | && !node->thunk.thunk_p |
c70f46b0 | 1341 | && !node->alias |
b0cdf642 | 1342 | && !node->global.inlined_to |
1e3aebec | 1343 | && (!cgraph_only_called_directly_p (node) |
c70f46b0 | 1344 | || ((e || ipa_ref_has_aliases_p (&node->ref_list)) |
1345 | && node->reachable)) | |
4ee9c684 | 1346 | && !TREE_ASM_WRITTEN (decl) |
ae01b312 | 1347 | && !DECL_EXTERNAL (decl)) |
61c2c7b1 | 1348 | { |
1349 | node->process = 1; | |
1350 | if (node->same_comdat_group) | |
1351 | { | |
1352 | struct cgraph_node *next; | |
1353 | for (next = node->same_comdat_group; | |
1354 | next != node; | |
1355 | next = next->same_comdat_group) | |
c70f46b0 | 1356 | if (!next->thunk.thunk_p && !next->alias) |
91bf9d9a | 1357 | next->process = 1; |
61c2c7b1 | 1358 | } |
1359 | } | |
1360 | else if (node->same_comdat_group) | |
1361 | { | |
1362 | #ifdef ENABLE_CHECKING | |
1363 | check_same_comdat_groups = true; | |
1364 | #endif | |
1365 | } | |
cc636d56 | 1366 | else |
9cee7c3f | 1367 | { |
1368 | /* We should've reclaimed all functions that are not needed. */ | |
1369 | #ifdef ENABLE_CHECKING | |
75a70cf9 | 1370 | if (!node->global.inlined_to |
1a1a827a | 1371 | && gimple_has_body_p (decl) |
08843223 | 1372 | /* FIXME: in ltrans unit when offline copy is outside partition but inline copies |
1373 | are inside partition, we can end up not removing the body since we no longer | |
1374 | have analyzed node pointing to it. */ | |
1375 | && !node->in_other_partition | |
c70f46b0 | 1376 | && !node->alias |
9cee7c3f | 1377 | && !DECL_EXTERNAL (decl)) |
1378 | { | |
1379 | dump_cgraph_node (stderr, node); | |
1380 | internal_error ("failed to reclaim unneeded function"); | |
1381 | } | |
1382 | #endif | |
75a70cf9 | 1383 | gcc_assert (node->global.inlined_to |
1a1a827a | 1384 | || !gimple_has_body_p (decl) |
08843223 | 1385 | || node->in_other_partition |
9cee7c3f | 1386 | || DECL_EXTERNAL (decl)); |
1387 | ||
1388 | } | |
a0c938f0 | 1389 | |
961e3b13 | 1390 | } |
61c2c7b1 | 1391 | #ifdef ENABLE_CHECKING |
1392 | if (check_same_comdat_groups) | |
1393 | for (node = cgraph_nodes; node; node = node->next) | |
1394 | if (node->same_comdat_group && !node->process) | |
1395 | { | |
1396 | tree decl = node->decl; | |
1397 | if (!node->global.inlined_to | |
1398 | && gimple_has_body_p (decl) | |
08843223 | 1399 | /* FIXME: in ltrans unit when offline copy is outside partition but inline copies |
1400 | are inside partition, we can end up not removing the body since we no longer | |
1401 | have analyzed node pointing to it. */ | |
1402 | && !node->in_other_partition | |
61c2c7b1 | 1403 | && !DECL_EXTERNAL (decl)) |
1404 | { | |
1405 | dump_cgraph_node (stderr, node); | |
c70f46b0 | 1406 | internal_error ("failed to reclaim unneeded functionin same comdat group"); |
61c2c7b1 | 1407 | } |
1408 | } | |
1409 | #endif | |
961e3b13 | 1410 | } |
1411 | ||
28454517 | 1412 | /* DECL is FUNCTION_DECL. Initialize datastructures so DECL is a function |
1413 | in lowered gimple form. | |
1414 | ||
1415 | Set current_function_decl and cfun to newly constructed empty function body. | |
1416 | return basic block in the function body. */ | |
1417 | ||
1418 | static basic_block | |
1419 | init_lowered_empty_function (tree decl) | |
1420 | { | |
1421 | basic_block bb; | |
1422 | ||
1423 | current_function_decl = decl; | |
1424 | allocate_struct_function (decl, false); | |
1425 | gimple_register_cfg_hooks (); | |
1426 | init_empty_tree_cfg (); | |
1427 | init_tree_ssa (cfun); | |
1428 | init_ssa_operands (); | |
1429 | cfun->gimple_df->in_ssa_p = true; | |
1430 | DECL_INITIAL (decl) = make_node (BLOCK); | |
1431 | ||
1432 | DECL_SAVED_TREE (decl) = error_mark_node; | |
1433 | cfun->curr_properties |= | |
1434 | (PROP_gimple_lcf | PROP_gimple_leh | PROP_cfg | PROP_referenced_vars | | |
657e3a56 | 1435 | PROP_ssa | PROP_gimple_any); |
28454517 | 1436 | |
1437 | /* Create BB for body of the function and connect it properly. */ | |
1438 | bb = create_basic_block (NULL, (void *) 0, ENTRY_BLOCK_PTR); | |
1439 | make_edge (ENTRY_BLOCK_PTR, bb, 0); | |
1440 | make_edge (bb, EXIT_BLOCK_PTR, 0); | |
1441 | ||
1442 | return bb; | |
1443 | } | |
1444 | ||
1445 | /* Adjust PTR by the constant FIXED_OFFSET, and by the vtable | |
1446 | offset indicated by VIRTUAL_OFFSET, if that is | |
1447 | non-null. THIS_ADJUSTING is nonzero for a this adjusting thunk and | |
1448 | zero for a result adjusting thunk. */ | |
1449 | ||
1450 | static tree | |
1451 | thunk_adjust (gimple_stmt_iterator * bsi, | |
1452 | tree ptr, bool this_adjusting, | |
1453 | HOST_WIDE_INT fixed_offset, tree virtual_offset) | |
1454 | { | |
1455 | gimple stmt; | |
1456 | tree ret; | |
1457 | ||
55d6cb23 | 1458 | if (this_adjusting |
1459 | && fixed_offset != 0) | |
28454517 | 1460 | { |
1461 | stmt = gimple_build_assign (ptr, | |
1462 | fold_build2_loc (input_location, | |
1463 | POINTER_PLUS_EXPR, | |
1464 | TREE_TYPE (ptr), ptr, | |
1465 | size_int (fixed_offset))); | |
1466 | gsi_insert_after (bsi, stmt, GSI_NEW_STMT); | |
1467 | } | |
1468 | ||
1469 | /* If there's a virtual offset, look up that value in the vtable and | |
1470 | adjust the pointer again. */ | |
1471 | if (virtual_offset) | |
1472 | { | |
1473 | tree vtabletmp; | |
1474 | tree vtabletmp2; | |
1475 | tree vtabletmp3; | |
1476 | tree offsettmp; | |
1477 | ||
1478 | if (!vtable_entry_type) | |
1479 | { | |
1480 | tree vfunc_type = make_node (FUNCTION_TYPE); | |
1481 | TREE_TYPE (vfunc_type) = integer_type_node; | |
1482 | TYPE_ARG_TYPES (vfunc_type) = NULL_TREE; | |
1483 | layout_type (vfunc_type); | |
1484 | ||
1485 | vtable_entry_type = build_pointer_type (vfunc_type); | |
1486 | } | |
1487 | ||
1488 | vtabletmp = | |
1489 | create_tmp_var (build_pointer_type | |
1490 | (build_pointer_type (vtable_entry_type)), "vptr"); | |
1491 | ||
1492 | /* The vptr is always at offset zero in the object. */ | |
1493 | stmt = gimple_build_assign (vtabletmp, | |
1494 | build1 (NOP_EXPR, TREE_TYPE (vtabletmp), | |
1495 | ptr)); | |
1496 | gsi_insert_after (bsi, stmt, GSI_NEW_STMT); | |
1497 | mark_symbols_for_renaming (stmt); | |
1498 | find_referenced_vars_in (stmt); | |
1499 | ||
1500 | /* Form the vtable address. */ | |
1501 | vtabletmp2 = create_tmp_var (TREE_TYPE (TREE_TYPE (vtabletmp)), | |
1502 | "vtableaddr"); | |
1503 | stmt = gimple_build_assign (vtabletmp2, | |
182cf5a9 | 1504 | build_simple_mem_ref (vtabletmp)); |
28454517 | 1505 | gsi_insert_after (bsi, stmt, GSI_NEW_STMT); |
1506 | mark_symbols_for_renaming (stmt); | |
1507 | find_referenced_vars_in (stmt); | |
1508 | ||
1509 | /* Find the entry with the vcall offset. */ | |
1510 | stmt = gimple_build_assign (vtabletmp2, | |
1511 | fold_build2_loc (input_location, | |
1512 | POINTER_PLUS_EXPR, | |
1513 | TREE_TYPE (vtabletmp2), | |
1514 | vtabletmp2, | |
1515 | fold_convert (sizetype, | |
1516 | virtual_offset))); | |
1517 | gsi_insert_after (bsi, stmt, GSI_NEW_STMT); | |
1518 | ||
1519 | /* Get the offset itself. */ | |
1520 | vtabletmp3 = create_tmp_var (TREE_TYPE (TREE_TYPE (vtabletmp2)), | |
1521 | "vcalloffset"); | |
1522 | stmt = gimple_build_assign (vtabletmp3, | |
182cf5a9 | 1523 | build_simple_mem_ref (vtabletmp2)); |
28454517 | 1524 | gsi_insert_after (bsi, stmt, GSI_NEW_STMT); |
1525 | mark_symbols_for_renaming (stmt); | |
1526 | find_referenced_vars_in (stmt); | |
1527 | ||
1528 | /* Cast to sizetype. */ | |
1529 | offsettmp = create_tmp_var (sizetype, "offset"); | |
1530 | stmt = gimple_build_assign (offsettmp, fold_convert (sizetype, vtabletmp3)); | |
1531 | gsi_insert_after (bsi, stmt, GSI_NEW_STMT); | |
1532 | mark_symbols_for_renaming (stmt); | |
1533 | find_referenced_vars_in (stmt); | |
1534 | ||
1535 | /* Adjust the `this' pointer. */ | |
1536 | ptr = fold_build2_loc (input_location, | |
1537 | POINTER_PLUS_EXPR, TREE_TYPE (ptr), ptr, | |
1538 | offsettmp); | |
1539 | } | |
1540 | ||
55d6cb23 | 1541 | if (!this_adjusting |
1542 | && fixed_offset != 0) | |
28454517 | 1543 | /* Adjust the pointer by the constant. */ |
1544 | { | |
1545 | tree ptrtmp; | |
1546 | ||
1547 | if (TREE_CODE (ptr) == VAR_DECL) | |
1548 | ptrtmp = ptr; | |
1549 | else | |
1550 | { | |
1551 | ptrtmp = create_tmp_var (TREE_TYPE (ptr), "ptr"); | |
1552 | stmt = gimple_build_assign (ptrtmp, ptr); | |
1553 | gsi_insert_after (bsi, stmt, GSI_NEW_STMT); | |
1554 | mark_symbols_for_renaming (stmt); | |
1555 | find_referenced_vars_in (stmt); | |
1556 | } | |
1557 | ptr = fold_build2_loc (input_location, | |
1558 | POINTER_PLUS_EXPR, TREE_TYPE (ptrtmp), ptrtmp, | |
1559 | size_int (fixed_offset)); | |
1560 | } | |
1561 | ||
1562 | /* Emit the statement and gimplify the adjustment expression. */ | |
1563 | ret = create_tmp_var (TREE_TYPE (ptr), "adjusted_this"); | |
1564 | stmt = gimple_build_assign (ret, ptr); | |
1565 | mark_symbols_for_renaming (stmt); | |
1566 | find_referenced_vars_in (stmt); | |
1567 | gsi_insert_after (bsi, stmt, GSI_NEW_STMT); | |
1568 | ||
1569 | return ret; | |
1570 | } | |
1571 | ||
1572 | /* Produce assembler for thunk NODE. */ | |
1573 | ||
1574 | static void | |
1575 | assemble_thunk (struct cgraph_node *node) | |
1576 | { | |
1577 | bool this_adjusting = node->thunk.this_adjusting; | |
1578 | HOST_WIDE_INT fixed_offset = node->thunk.fixed_offset; | |
1579 | HOST_WIDE_INT virtual_value = node->thunk.virtual_value; | |
1580 | tree virtual_offset = NULL; | |
1581 | tree alias = node->thunk.alias; | |
1582 | tree thunk_fndecl = node->decl; | |
1583 | tree a = DECL_ARGUMENTS (thunk_fndecl); | |
1584 | ||
1585 | current_function_decl = thunk_fndecl; | |
1586 | ||
aed6e608 | 1587 | /* Ensure thunks are emitted in their correct sections. */ |
1588 | resolve_unique_section (thunk_fndecl, 0, flag_function_sections); | |
1589 | ||
28454517 | 1590 | if (this_adjusting |
1591 | && targetm.asm_out.can_output_mi_thunk (thunk_fndecl, fixed_offset, | |
1592 | virtual_value, alias)) | |
1593 | { | |
1594 | const char *fnname; | |
1595 | tree fn_block; | |
28b2c6a7 | 1596 | tree restype = TREE_TYPE (TREE_TYPE (thunk_fndecl)); |
28454517 | 1597 | |
1598 | DECL_RESULT (thunk_fndecl) | |
1599 | = build_decl (DECL_SOURCE_LOCATION (thunk_fndecl), | |
28b2c6a7 | 1600 | RESULT_DECL, 0, restype); |
22ea3b47 | 1601 | fnname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (thunk_fndecl)); |
28454517 | 1602 | |
1603 | /* The back end expects DECL_INITIAL to contain a BLOCK, so we | |
1604 | create one. */ | |
1605 | fn_block = make_node (BLOCK); | |
1606 | BLOCK_VARS (fn_block) = a; | |
1607 | DECL_INITIAL (thunk_fndecl) = fn_block; | |
1608 | init_function_start (thunk_fndecl); | |
1609 | cfun->is_thunk = 1; | |
1610 | assemble_start_function (thunk_fndecl, fnname); | |
1611 | ||
1612 | targetm.asm_out.output_mi_thunk (asm_out_file, thunk_fndecl, | |
1613 | fixed_offset, virtual_value, alias); | |
1614 | ||
1615 | assemble_end_function (thunk_fndecl, fnname); | |
1616 | init_insn_lengths (); | |
1617 | free_after_compilation (cfun); | |
1618 | set_cfun (NULL); | |
1619 | TREE_ASM_WRITTEN (thunk_fndecl) = 1; | |
91bf9d9a | 1620 | node->thunk.thunk_p = false; |
1621 | node->analyzed = false; | |
28454517 | 1622 | } |
1623 | else | |
1624 | { | |
1625 | tree restype; | |
1626 | basic_block bb, then_bb, else_bb, return_bb; | |
1627 | gimple_stmt_iterator bsi; | |
1628 | int nargs = 0; | |
1629 | tree arg; | |
1630 | int i; | |
1631 | tree resdecl; | |
1632 | tree restmp = NULL; | |
1633 | VEC(tree, heap) *vargs; | |
1634 | ||
1635 | gimple call; | |
1636 | gimple ret; | |
1637 | ||
1638 | DECL_IGNORED_P (thunk_fndecl) = 1; | |
1639 | bitmap_obstack_initialize (NULL); | |
1640 | ||
1641 | if (node->thunk.virtual_offset_p) | |
1642 | virtual_offset = size_int (virtual_value); | |
1643 | ||
1644 | /* Build the return declaration for the function. */ | |
1645 | restype = TREE_TYPE (TREE_TYPE (thunk_fndecl)); | |
1646 | if (DECL_RESULT (thunk_fndecl) == NULL_TREE) | |
1647 | { | |
1648 | resdecl = build_decl (input_location, RESULT_DECL, 0, restype); | |
1649 | DECL_ARTIFICIAL (resdecl) = 1; | |
1650 | DECL_IGNORED_P (resdecl) = 1; | |
1651 | DECL_RESULT (thunk_fndecl) = resdecl; | |
1652 | } | |
1653 | else | |
1654 | resdecl = DECL_RESULT (thunk_fndecl); | |
1655 | ||
1656 | bb = then_bb = else_bb = return_bb = init_lowered_empty_function (thunk_fndecl); | |
1657 | ||
1658 | bsi = gsi_start_bb (bb); | |
1659 | ||
1660 | /* Build call to the function being thunked. */ | |
1661 | if (!VOID_TYPE_P (restype)) | |
1662 | { | |
1663 | if (!is_gimple_reg_type (restype)) | |
1664 | { | |
1665 | restmp = resdecl; | |
2ab2ce89 | 1666 | add_local_decl (cfun, restmp); |
28454517 | 1667 | BLOCK_VARS (DECL_INITIAL (current_function_decl)) = restmp; |
1668 | } | |
1669 | else | |
1670 | restmp = create_tmp_var_raw (restype, "retval"); | |
1671 | } | |
1672 | ||
1767a056 | 1673 | for (arg = a; arg; arg = DECL_CHAIN (arg)) |
28454517 | 1674 | nargs++; |
1675 | vargs = VEC_alloc (tree, heap, nargs); | |
1676 | if (this_adjusting) | |
1677 | VEC_quick_push (tree, vargs, | |
1678 | thunk_adjust (&bsi, | |
1679 | a, 1, fixed_offset, | |
1680 | virtual_offset)); | |
1681 | else | |
1682 | VEC_quick_push (tree, vargs, a); | |
1767a056 | 1683 | for (i = 1, arg = DECL_CHAIN (a); i < nargs; i++, arg = DECL_CHAIN (arg)) |
28454517 | 1684 | VEC_quick_push (tree, vargs, arg); |
1685 | call = gimple_build_call_vec (build_fold_addr_expr_loc (0, alias), vargs); | |
1686 | VEC_free (tree, heap, vargs); | |
1687 | gimple_call_set_cannot_inline (call, true); | |
1688 | gimple_call_set_from_thunk (call, true); | |
1689 | if (restmp) | |
1690 | gimple_call_set_lhs (call, restmp); | |
1691 | gsi_insert_after (&bsi, call, GSI_NEW_STMT); | |
1692 | mark_symbols_for_renaming (call); | |
1693 | find_referenced_vars_in (call); | |
1694 | update_stmt (call); | |
1695 | ||
1696 | if (restmp && !this_adjusting) | |
1697 | { | |
57ab8ec3 | 1698 | tree true_label = NULL_TREE; |
28454517 | 1699 | |
1700 | if (TREE_CODE (TREE_TYPE (restmp)) == POINTER_TYPE) | |
1701 | { | |
1702 | gimple stmt; | |
1703 | /* If the return type is a pointer, we need to | |
1704 | protect against NULL. We know there will be an | |
1705 | adjustment, because that's why we're emitting a | |
1706 | thunk. */ | |
1707 | then_bb = create_basic_block (NULL, (void *) 0, bb); | |
1708 | return_bb = create_basic_block (NULL, (void *) 0, then_bb); | |
1709 | else_bb = create_basic_block (NULL, (void *) 0, else_bb); | |
1710 | remove_edge (single_succ_edge (bb)); | |
1711 | true_label = gimple_block_label (then_bb); | |
28454517 | 1712 | stmt = gimple_build_cond (NE_EXPR, restmp, |
385f3f36 | 1713 | build_zero_cst (TREE_TYPE (restmp)), |
28454517 | 1714 | NULL_TREE, NULL_TREE); |
1715 | gsi_insert_after (&bsi, stmt, GSI_NEW_STMT); | |
1716 | make_edge (bb, then_bb, EDGE_TRUE_VALUE); | |
1717 | make_edge (bb, else_bb, EDGE_FALSE_VALUE); | |
1718 | make_edge (return_bb, EXIT_BLOCK_PTR, 0); | |
1719 | make_edge (then_bb, return_bb, EDGE_FALLTHRU); | |
1720 | make_edge (else_bb, return_bb, EDGE_FALLTHRU); | |
1721 | bsi = gsi_last_bb (then_bb); | |
1722 | } | |
1723 | ||
1724 | restmp = thunk_adjust (&bsi, restmp, /*this_adjusting=*/0, | |
1725 | fixed_offset, virtual_offset); | |
1726 | if (true_label) | |
1727 | { | |
1728 | gimple stmt; | |
1729 | bsi = gsi_last_bb (else_bb); | |
385f3f36 | 1730 | stmt = gimple_build_assign (restmp, |
1731 | build_zero_cst (TREE_TYPE (restmp))); | |
28454517 | 1732 | gsi_insert_after (&bsi, stmt, GSI_NEW_STMT); |
1733 | bsi = gsi_last_bb (return_bb); | |
1734 | } | |
1735 | } | |
1736 | else | |
1737 | gimple_call_set_tail (call, true); | |
1738 | ||
1739 | /* Build return value. */ | |
1740 | ret = gimple_build_return (restmp); | |
1741 | gsi_insert_after (&bsi, ret, GSI_NEW_STMT); | |
1742 | ||
1743 | delete_unreachable_blocks (); | |
1744 | update_ssa (TODO_update_ssa); | |
1745 | ||
28454517 | 1746 | /* Since we want to emit the thunk, we explicitly mark its name as |
1747 | referenced. */ | |
91bf9d9a | 1748 | node->thunk.thunk_p = false; |
1749 | cgraph_node_remove_callees (node); | |
28454517 | 1750 | cgraph_add_new_function (thunk_fndecl, true); |
1751 | bitmap_obstack_release (NULL); | |
1752 | } | |
1753 | current_function_decl = NULL; | |
1754 | } | |
1755 | ||
91bf9d9a | 1756 | |
c70f46b0 | 1757 | |
1758 | /* Assemble thunks and aliases asociated to NODE. */ | |
91bf9d9a | 1759 | |
1760 | static void | |
c70f46b0 | 1761 | assemble_thunks_and_aliases (struct cgraph_node *node) |
91bf9d9a | 1762 | { |
1763 | struct cgraph_edge *e; | |
c70f46b0 | 1764 | int i; |
1765 | struct ipa_ref *ref; | |
1766 | ||
91bf9d9a | 1767 | for (e = node->callers; e;) |
1768 | if (e->caller->thunk.thunk_p) | |
1769 | { | |
1770 | struct cgraph_node *thunk = e->caller; | |
1771 | ||
1772 | e = e->next_caller; | |
c70f46b0 | 1773 | assemble_thunks_and_aliases (thunk); |
91bf9d9a | 1774 | assemble_thunk (thunk); |
1775 | } | |
1776 | else | |
1777 | e = e->next_caller; | |
c70f46b0 | 1778 | for (i = 0; ipa_ref_list_refering_iterate (&node->ref_list, i, ref); i++) |
1779 | if (ref->use == IPA_REF_ALIAS) | |
1780 | { | |
1781 | struct cgraph_node *alias = ipa_ref_refering_node (ref); | |
1782 | assemble_alias (alias->decl, | |
1783 | DECL_ASSEMBLER_NAME (alias->thunk.alias)); | |
1784 | assemble_thunks_and_aliases (alias); | |
1785 | } | |
91bf9d9a | 1786 | } |
1787 | ||
ae01b312 | 1788 | /* Expand function specified by NODE. */ |
e6d2b2d8 | 1789 | |
ae01b312 | 1790 | static void |
d9d9733a | 1791 | cgraph_expand_function (struct cgraph_node *node) |
ae01b312 | 1792 | { |
1793 | tree decl = node->decl; | |
1794 | ||
b0cdf642 | 1795 | /* We ought to not compile any inline clones. */ |
cc636d56 | 1796 | gcc_assert (!node->global.inlined_to); |
b0cdf642 | 1797 | |
6329636b | 1798 | announce_function (decl); |
09fc9532 | 1799 | node->process = 0; |
c70f46b0 | 1800 | assemble_thunks_and_aliases (node); |
f7777314 | 1801 | gcc_assert (node->lowered); |
1802 | ||
1803 | /* Generate RTL for the body of DECL. */ | |
1804 | tree_rest_of_compilation (decl); | |
1805 | ||
1806 | /* Make sure that BE didn't give up on compiling. */ | |
1807 | gcc_assert (TREE_ASM_WRITTEN (decl)); | |
1808 | current_function_decl = NULL; | |
cc91b414 | 1809 | gcc_assert (!cgraph_preserve_function_body_p (node)); |
1a1a827a | 1810 | cgraph_release_function_body (node); |
1811 | /* Eliminate all call edges. This is important so the GIMPLE_CALL no longer | |
1812 | points to the dead function body. */ | |
1813 | cgraph_node_remove_callees (node); | |
e1be32b8 | 1814 | |
1815 | cgraph_function_flags_ready = true; | |
ae01b312 | 1816 | } |
1817 | ||
b0cdf642 | 1818 | /* Return true when CALLER_DECL should be inlined into CALLEE_DECL. */ |
d7c6d889 | 1819 | |
1820 | bool | |
326a9581 | 1821 | cgraph_inline_p (struct cgraph_edge *e, cgraph_inline_failed_t *reason) |
d7c6d889 | 1822 | { |
b0cdf642 | 1823 | *reason = e->inline_failed; |
1824 | return !e->inline_failed; | |
d7c6d889 | 1825 | } |
b0cdf642 | 1826 | |
acc70efa | 1827 | |
acc70efa | 1828 | |
d9d9733a | 1829 | /* Expand all functions that must be output. |
1830 | ||
d7c6d889 | 1831 | Attempt to topologically sort the nodes so function is output when |
1832 | all called functions are already assembled to allow data to be | |
91c82c20 | 1833 | propagated across the callgraph. Use a stack to get smaller distance |
3927afe0 | 1834 | between a function and its callees (later we may choose to use a more |
d7c6d889 | 1835 | sophisticated algorithm for function reordering; we will likely want |
1836 | to use subsections to make the output functions appear in top-down | |
1837 | order). */ | |
1838 | ||
1839 | static void | |
a6868229 | 1840 | cgraph_expand_all_functions (void) |
d7c6d889 | 1841 | { |
1842 | struct cgraph_node *node; | |
4c36ffe6 | 1843 | struct cgraph_node **order = XCNEWVEC (struct cgraph_node *, cgraph_n_nodes); |
c04e3894 | 1844 | int order_pos, new_order_pos = 0; |
d7c6d889 | 1845 | int i; |
1846 | ||
7771d558 | 1847 | order_pos = ipa_reverse_postorder (order); |
cc636d56 | 1848 | gcc_assert (order_pos == cgraph_n_nodes); |
d7c6d889 | 1849 | |
7bd28bba | 1850 | /* Garbage collector may remove inline clones we eliminate during |
b0cdf642 | 1851 | optimization. So we must be sure to not reference them. */ |
1852 | for (i = 0; i < order_pos; i++) | |
09fc9532 | 1853 | if (order[i]->process) |
b0cdf642 | 1854 | order[new_order_pos++] = order[i]; |
1855 | ||
1856 | for (i = new_order_pos - 1; i >= 0; i--) | |
d7c6d889 | 1857 | { |
1858 | node = order[i]; | |
09fc9532 | 1859 | if (node->process) |
d7c6d889 | 1860 | { |
cc636d56 | 1861 | gcc_assert (node->reachable); |
09fc9532 | 1862 | node->process = 0; |
d7c6d889 | 1863 | cgraph_expand_function (node); |
1864 | } | |
1865 | } | |
523c1122 | 1866 | cgraph_process_new_functions (); |
773c5ba7 | 1867 | |
d7c6d889 | 1868 | free (order); |
773c5ba7 | 1869 | |
d7c6d889 | 1870 | } |
1871 | ||
56af936e | 1872 | /* This is used to sort the node types by the cgraph order number. */ |
1873 | ||
0b09525f | 1874 | enum cgraph_order_sort_kind |
1875 | { | |
1876 | ORDER_UNDEFINED = 0, | |
1877 | ORDER_FUNCTION, | |
1878 | ORDER_VAR, | |
1879 | ORDER_ASM | |
1880 | }; | |
1881 | ||
56af936e | 1882 | struct cgraph_order_sort |
1883 | { | |
0b09525f | 1884 | enum cgraph_order_sort_kind kind; |
56af936e | 1885 | union |
1886 | { | |
1887 | struct cgraph_node *f; | |
1d416bd7 | 1888 | struct varpool_node *v; |
56af936e | 1889 | struct cgraph_asm_node *a; |
1890 | } u; | |
1891 | }; | |
1892 | ||
1893 | /* Output all functions, variables, and asm statements in the order | |
1894 | according to their order fields, which is the order in which they | |
1895 | appeared in the file. This implements -fno-toplevel-reorder. In | |
1896 | this mode we may output functions and variables which don't really | |
1897 | need to be output. */ | |
1898 | ||
1899 | static void | |
1900 | cgraph_output_in_order (void) | |
1901 | { | |
1902 | int max; | |
56af936e | 1903 | struct cgraph_order_sort *nodes; |
1904 | int i; | |
1905 | struct cgraph_node *pf; | |
1d416bd7 | 1906 | struct varpool_node *pv; |
56af936e | 1907 | struct cgraph_asm_node *pa; |
1908 | ||
1909 | max = cgraph_order; | |
3e1cde87 | 1910 | nodes = XCNEWVEC (struct cgraph_order_sort, max); |
56af936e | 1911 | |
1d416bd7 | 1912 | varpool_analyze_pending_decls (); |
56af936e | 1913 | |
1914 | for (pf = cgraph_nodes; pf; pf = pf->next) | |
1915 | { | |
c70f46b0 | 1916 | if (pf->process && !pf->thunk.thunk_p && !pf->alias) |
56af936e | 1917 | { |
1918 | i = pf->order; | |
1919 | gcc_assert (nodes[i].kind == ORDER_UNDEFINED); | |
1920 | nodes[i].kind = ORDER_FUNCTION; | |
1921 | nodes[i].u.f = pf; | |
1922 | } | |
1923 | } | |
1924 | ||
1d416bd7 | 1925 | for (pv = varpool_nodes_queue; pv; pv = pv->next_needed) |
56af936e | 1926 | { |
1927 | i = pv->order; | |
1928 | gcc_assert (nodes[i].kind == ORDER_UNDEFINED); | |
1929 | nodes[i].kind = ORDER_VAR; | |
1930 | nodes[i].u.v = pv; | |
1931 | } | |
1932 | ||
1933 | for (pa = cgraph_asm_nodes; pa; pa = pa->next) | |
1934 | { | |
1935 | i = pa->order; | |
1936 | gcc_assert (nodes[i].kind == ORDER_UNDEFINED); | |
1937 | nodes[i].kind = ORDER_ASM; | |
1938 | nodes[i].u.a = pa; | |
1939 | } | |
56af936e | 1940 | |
304e5318 | 1941 | /* In toplevel reorder mode we output all statics; mark them as needed. */ |
1942 | for (i = 0; i < max; ++i) | |
1943 | { | |
1944 | if (nodes[i].kind == ORDER_VAR) | |
1945 | { | |
1946 | varpool_mark_needed_node (nodes[i].u.v); | |
1947 | } | |
1948 | } | |
1949 | varpool_empty_needed_queue (); | |
1950 | ||
91da0f1c | 1951 | for (i = 0; i < max; ++i) |
1952 | if (nodes[i].kind == ORDER_VAR) | |
1953 | varpool_finalize_named_section_flags (nodes[i].u.v); | |
1954 | ||
56af936e | 1955 | for (i = 0; i < max; ++i) |
1956 | { | |
1957 | switch (nodes[i].kind) | |
1958 | { | |
1959 | case ORDER_FUNCTION: | |
09fc9532 | 1960 | nodes[i].u.f->process = 0; |
56af936e | 1961 | cgraph_expand_function (nodes[i].u.f); |
1962 | break; | |
1963 | ||
1964 | case ORDER_VAR: | |
1d416bd7 | 1965 | varpool_assemble_decl (nodes[i].u.v); |
56af936e | 1966 | break; |
1967 | ||
1968 | case ORDER_ASM: | |
1969 | assemble_asm (nodes[i].u.a->asm_str); | |
1970 | break; | |
1971 | ||
1972 | case ORDER_UNDEFINED: | |
1973 | break; | |
1974 | ||
1975 | default: | |
1976 | gcc_unreachable (); | |
1977 | } | |
1978 | } | |
4b4ea2db | 1979 | |
1980 | cgraph_asm_nodes = NULL; | |
3e1cde87 | 1981 | free (nodes); |
56af936e | 1982 | } |
1983 | ||
b0cdf642 | 1984 | /* Return true when function body of DECL still needs to be kept around |
1985 | for later re-use. */ | |
1986 | bool | |
cc91b414 | 1987 | cgraph_preserve_function_body_p (struct cgraph_node *node) |
b0cdf642 | 1988 | { |
8d8c4c8d | 1989 | gcc_assert (cgraph_global_info_ready); |
c70f46b0 | 1990 | gcc_assert (!node->alias && !node->thunk.thunk_p); |
cc91b414 | 1991 | |
b0cdf642 | 1992 | /* Look if there is any clone around. */ |
ccf4ab6b | 1993 | if (node->clones) |
1994 | return true; | |
b0cdf642 | 1995 | return false; |
1996 | } | |
1997 | ||
77fce4cd | 1998 | static void |
1999 | ipa_passes (void) | |
2000 | { | |
87d4aa85 | 2001 | set_cfun (NULL); |
4b14adf9 | 2002 | current_function_decl = NULL; |
75a70cf9 | 2003 | gimple_register_cfg_hooks (); |
77fce4cd | 2004 | bitmap_obstack_initialize (NULL); |
59dd4830 | 2005 | |
c9036234 | 2006 | invoke_plugin_callbacks (PLUGIN_ALL_IPA_PASSES_START, NULL); |
2007 | ||
59dd4830 | 2008 | if (!in_lto_p) |
7b2e8956 | 2009 | { |
2010 | execute_ipa_pass_list (all_small_ipa_passes); | |
2011 | if (seen_error ()) | |
2012 | return; | |
2013 | } | |
9ed5b1f5 | 2014 | |
7bfefa9d | 2015 | /* If pass_all_early_optimizations was not scheduled, the state of |
2016 | the cgraph will not be properly updated. Update it now. */ | |
2017 | if (cgraph_state < CGRAPH_STATE_IPA_SSA) | |
2018 | cgraph_state = CGRAPH_STATE_IPA_SSA; | |
9ed5b1f5 | 2019 | |
7bfefa9d | 2020 | if (!in_lto_p) |
2021 | { | |
2022 | /* Generate coverage variables and constructors. */ | |
2023 | coverage_finish (); | |
2024 | ||
2025 | /* Process new functions added. */ | |
2026 | set_cfun (NULL); | |
2027 | current_function_decl = NULL; | |
2028 | cgraph_process_new_functions (); | |
7bfefa9d | 2029 | |
c9036234 | 2030 | execute_ipa_summary_passes |
2031 | ((struct ipa_opt_pass_d *) all_regular_ipa_passes); | |
8867b500 | 2032 | } |
23433d72 | 2033 | |
2034 | /* Some targets need to handle LTO assembler output specially. */ | |
2035 | if (flag_generate_lto) | |
2036 | targetm.asm_out.lto_start (); | |
2037 | ||
7bfefa9d | 2038 | execute_ipa_summary_passes ((struct ipa_opt_pass_d *) all_lto_gen_passes); |
2039 | ||
2040 | if (!in_lto_p) | |
2041 | ipa_write_summaries (); | |
2042 | ||
23433d72 | 2043 | if (flag_generate_lto) |
2044 | targetm.asm_out.lto_end (); | |
2045 | ||
8867b500 | 2046 | if (!flag_ltrans) |
2047 | execute_ipa_pass_list (all_regular_ipa_passes); | |
c9036234 | 2048 | invoke_plugin_callbacks (PLUGIN_ALL_IPA_PASSES_END, NULL); |
9ed5b1f5 | 2049 | |
77fce4cd | 2050 | bitmap_obstack_release (NULL); |
2051 | } | |
2052 | ||
34e5cced | 2053 | |
ae01b312 | 2054 | /* Perform simple optimizations based on callgraph. */ |
2055 | ||
7bfefa9d | 2056 | void |
d9d9733a | 2057 | cgraph_optimize (void) |
ae01b312 | 2058 | { |
852f689e | 2059 | if (seen_error ()) |
cb2b5570 | 2060 | return; |
2061 | ||
b0cdf642 | 2062 | #ifdef ENABLE_CHECKING |
2063 | verify_cgraph (); | |
2064 | #endif | |
a861fe52 | 2065 | |
c1dcd13c | 2066 | /* Frontend may output common variables after the unit has been finalized. |
2067 | It is safe to deal with them here as they are always zero initialized. */ | |
1d416bd7 | 2068 | varpool_analyze_pending_decls (); |
e9f08e82 | 2069 | |
f79b6507 | 2070 | timevar_push (TV_CGRAPHOPT); |
51949610 | 2071 | if (pre_ipa_mem_report) |
2072 | { | |
2073 | fprintf (stderr, "Memory consumption before IPA\n"); | |
2074 | dump_memory_report (false); | |
2075 | } | |
d7c6d889 | 2076 | if (!quiet_flag) |
cd6bca02 | 2077 | fprintf (stderr, "Performing interprocedural optimizations\n"); |
523c1122 | 2078 | cgraph_state = CGRAPH_STATE_IPA; |
c04e3894 | 2079 | |
be4d0974 | 2080 | /* Don't run the IPA passes if there was any error or sorry messages. */ |
852f689e | 2081 | if (!seen_error ()) |
be4d0974 | 2082 | ipa_passes (); |
2083 | ||
34e5cced | 2084 | /* Do nothing else if any IPA pass found errors. */ |
852f689e | 2085 | if (seen_error ()) |
021c1c18 | 2086 | { |
2087 | timevar_pop (TV_CGRAPHOPT); | |
2088 | return; | |
2089 | } | |
34e5cced | 2090 | |
e1be32b8 | 2091 | /* This pass remove bodies of extern inline functions we never inlined. |
2092 | Do this later so other IPA passes see what is really going on. */ | |
2093 | cgraph_remove_unreachable_nodes (false, dump_file); | |
80a85d8a | 2094 | cgraph_global_info_ready = true; |
f79b6507 | 2095 | if (cgraph_dump_file) |
2096 | { | |
e4200070 | 2097 | fprintf (cgraph_dump_file, "Optimized "); |
f79b6507 | 2098 | dump_cgraph (cgraph_dump_file); |
c1dcd13c | 2099 | dump_varpool (cgraph_dump_file); |
f79b6507 | 2100 | } |
51949610 | 2101 | if (post_ipa_mem_report) |
2102 | { | |
defa2fa6 | 2103 | fprintf (stderr, "Memory consumption after IPA\n"); |
51949610 | 2104 | dump_memory_report (false); |
2105 | } | |
f79b6507 | 2106 | timevar_pop (TV_CGRAPHOPT); |
ae01b312 | 2107 | |
d7c6d889 | 2108 | /* Output everything. */ |
47306a5d | 2109 | (*debug_hooks->assembly_start) (); |
e4200070 | 2110 | if (!quiet_flag) |
2111 | fprintf (stderr, "Assembling functions:\n"); | |
b0cdf642 | 2112 | #ifdef ENABLE_CHECKING |
2113 | verify_cgraph (); | |
2114 | #endif | |
56af936e | 2115 | |
ccf4ab6b | 2116 | cgraph_materialize_all_clones (); |
657e3a56 | 2117 | bitmap_obstack_initialize (NULL); |
2118 | execute_ipa_pass_list (all_late_ipa_passes); | |
2119 | cgraph_remove_unreachable_nodes (true, dump_file); | |
2120 | #ifdef ENABLE_CHECKING | |
2121 | verify_cgraph (); | |
2122 | #endif | |
2123 | bitmap_obstack_release (NULL); | |
acc70efa | 2124 | cgraph_mark_functions_to_output (); |
c1dcd13c | 2125 | |
523c1122 | 2126 | cgraph_state = CGRAPH_STATE_EXPANSION; |
56af936e | 2127 | if (!flag_toplevel_reorder) |
2128 | cgraph_output_in_order (); | |
2129 | else | |
2130 | { | |
2131 | cgraph_output_pending_asms (); | |
2132 | ||
2133 | cgraph_expand_all_functions (); | |
1d416bd7 | 2134 | varpool_remove_unreferenced_decls (); |
56af936e | 2135 | |
1d416bd7 | 2136 | varpool_assemble_pending_decls (); |
56af936e | 2137 | } |
523c1122 | 2138 | cgraph_process_new_functions (); |
2139 | cgraph_state = CGRAPH_STATE_FINISHED; | |
c1dcd13c | 2140 | |
f79b6507 | 2141 | if (cgraph_dump_file) |
2142 | { | |
e4200070 | 2143 | fprintf (cgraph_dump_file, "\nFinal "); |
f79b6507 | 2144 | dump_cgraph (cgraph_dump_file); |
7410370b | 2145 | dump_varpool (cgraph_dump_file); |
f79b6507 | 2146 | } |
b0cdf642 | 2147 | #ifdef ENABLE_CHECKING |
2148 | verify_cgraph (); | |
4ee9c684 | 2149 | /* Double check that all inline clones are gone and that all |
2150 | function bodies have been released from memory. */ | |
852f689e | 2151 | if (!seen_error ()) |
4ee9c684 | 2152 | { |
2153 | struct cgraph_node *node; | |
2154 | bool error_found = false; | |
2155 | ||
2156 | for (node = cgraph_nodes; node; node = node->next) | |
2157 | if (node->analyzed | |
2158 | && (node->global.inlined_to | |
1a1a827a | 2159 | || gimple_has_body_p (node->decl))) |
4ee9c684 | 2160 | { |
2161 | error_found = true; | |
2162 | dump_cgraph_node (stderr, node); | |
a0c938f0 | 2163 | } |
4ee9c684 | 2164 | if (error_found) |
c04e3894 | 2165 | internal_error ("nodes with unreleased memory found"); |
4ee9c684 | 2166 | } |
b0cdf642 | 2167 | #endif |
ae01b312 | 2168 | } |
34e5cced | 2169 | |
121f3051 | 2170 | void |
2171 | init_cgraph (void) | |
2172 | { | |
01ec0a6c | 2173 | if (!cgraph_dump_file) |
2174 | cgraph_dump_file = dump_begin (TDI_cgraph, NULL); | |
121f3051 | 2175 | } |
b5d36404 | 2176 | |
a0c938f0 | 2177 | /* The edges representing the callers of the NEW_VERSION node were |
b5d36404 | 2178 | fixed by cgraph_function_versioning (), now the call_expr in their |
2179 | respective tree code should be updated to call the NEW_VERSION. */ | |
2180 | ||
2181 | static void | |
2182 | update_call_expr (struct cgraph_node *new_version) | |
2183 | { | |
2184 | struct cgraph_edge *e; | |
2185 | ||
2186 | gcc_assert (new_version); | |
75a70cf9 | 2187 | |
2188 | /* Update the call expr on the edges to call the new version. */ | |
b5d36404 | 2189 | for (e = new_version->callers; e; e = e->next_caller) |
e03a95e7 | 2190 | { |
2191 | struct function *inner_function = DECL_STRUCT_FUNCTION (e->caller->decl); | |
2192 | gimple_call_set_fndecl (e->call_stmt, new_version->decl); | |
e38def9c | 2193 | maybe_clean_eh_stmt_fn (inner_function, e->call_stmt); |
e03a95e7 | 2194 | } |
b5d36404 | 2195 | } |
2196 | ||
2197 | ||
2198 | /* Create a new cgraph node which is the new version of | |
2199 | OLD_VERSION node. REDIRECT_CALLERS holds the callers | |
2200 | edges which should be redirected to point to | |
2201 | NEW_VERSION. ALL the callees edges of OLD_VERSION | |
2202 | are cloned to the new version node. Return the new | |
b06ab5fa | 2203 | version node. |
2204 | ||
2205 | If non-NULL BLOCK_TO_COPY determine what basic blocks | |
2206 | was copied to prevent duplications of calls that are dead | |
2207 | in the clone. */ | |
b5d36404 | 2208 | |
2209 | static struct cgraph_node * | |
2210 | cgraph_copy_node_for_versioning (struct cgraph_node *old_version, | |
4460a647 | 2211 | tree new_decl, |
b06ab5fa | 2212 | VEC(cgraph_edge_p,heap) *redirect_callers, |
2213 | bitmap bbs_to_copy) | |
2214 | { | |
b5d36404 | 2215 | struct cgraph_node *new_version; |
32936803 | 2216 | struct cgraph_edge *e; |
b5d36404 | 2217 | unsigned i; |
2218 | ||
2219 | gcc_assert (old_version); | |
a0c938f0 | 2220 | |
5a90471f | 2221 | new_version = cgraph_create_node (new_decl); |
b5d36404 | 2222 | |
2223 | new_version->analyzed = true; | |
2224 | new_version->local = old_version->local; | |
a70a5e2c | 2225 | new_version->local.externally_visible = false; |
2226 | new_version->local.local = true; | |
b5d36404 | 2227 | new_version->global = old_version->global; |
a93f1c3b | 2228 | new_version->rtl = old_version->rtl; |
b5d36404 | 2229 | new_version->reachable = true; |
2230 | new_version->count = old_version->count; | |
2231 | ||
a70a5e2c | 2232 | for (e = old_version->callees; e; e=e->next_callee) |
b06ab5fa | 2233 | if (!bbs_to_copy |
2234 | || bitmap_bit_p (bbs_to_copy, gimple_bb (e->call_stmt)->index)) | |
2235 | cgraph_clone_edge (e, new_version, e->call_stmt, | |
2236 | e->lto_stmt_uid, REG_BR_PROB_BASE, | |
2237 | CGRAPH_FREQ_BASE, | |
0835ad03 | 2238 | true); |
a70a5e2c | 2239 | for (e = old_version->indirect_calls; e; e=e->next_callee) |
b06ab5fa | 2240 | if (!bbs_to_copy |
2241 | || bitmap_bit_p (bbs_to_copy, gimple_bb (e->call_stmt)->index)) | |
2242 | cgraph_clone_edge (e, new_version, e->call_stmt, | |
2243 | e->lto_stmt_uid, REG_BR_PROB_BASE, | |
2244 | CGRAPH_FREQ_BASE, | |
0835ad03 | 2245 | true); |
48148244 | 2246 | FOR_EACH_VEC_ELT (cgraph_edge_p, redirect_callers, i, e) |
4460a647 | 2247 | { |
2248 | /* Redirect calls to the old version node to point to its new | |
2249 | version. */ | |
2250 | cgraph_redirect_edge_callee (e, new_version); | |
2251 | } | |
b5d36404 | 2252 | |
2253 | return new_version; | |
2254 | } | |
2255 | ||
2256 | /* Perform function versioning. | |
a0c938f0 | 2257 | Function versioning includes copying of the tree and |
b5d36404 | 2258 | a callgraph update (creating a new cgraph node and updating |
2259 | its callees and callers). | |
2260 | ||
2261 | REDIRECT_CALLERS varray includes the edges to be redirected | |
2262 | to the new version. | |
2263 | ||
2264 | TREE_MAP is a mapping of tree nodes we want to replace with | |
2265 | new ones (according to results of prior analysis). | |
2266 | OLD_VERSION_NODE is the node that is versioned. | |
48e1416a | 2267 | It returns the new version's cgraph node. |
b06ab5fa | 2268 | If non-NULL ARGS_TO_SKIP determine function parameters to remove |
2269 | from new version. | |
2270 | If non-NULL BLOCK_TO_COPY determine what basic blocks to copy. | |
2271 | If non_NULL NEW_ENTRY determine new entry BB of the clone. */ | |
b5d36404 | 2272 | |
2273 | struct cgraph_node * | |
2274 | cgraph_function_versioning (struct cgraph_node *old_version_node, | |
4460a647 | 2275 | VEC(cgraph_edge_p,heap) *redirect_callers, |
ccf4ab6b | 2276 | VEC (ipa_replace_map_p,gc)* tree_map, |
a70a5e2c | 2277 | bitmap args_to_skip, |
b06ab5fa | 2278 | bitmap bbs_to_copy, |
2279 | basic_block new_entry_block, | |
a70a5e2c | 2280 | const char *clone_name) |
b5d36404 | 2281 | { |
2282 | tree old_decl = old_version_node->decl; | |
2283 | struct cgraph_node *new_version_node = NULL; | |
2284 | tree new_decl; | |
2285 | ||
2286 | if (!tree_versionable_function_p (old_decl)) | |
2287 | return NULL; | |
2288 | ||
3c97c75d | 2289 | gcc_assert (old_version_node->local.can_change_signature || !args_to_skip); |
2290 | ||
b5d36404 | 2291 | /* Make a new FUNCTION_DECL tree node for the |
2292 | new version. */ | |
5afe38fe | 2293 | if (!args_to_skip) |
2294 | new_decl = copy_node (old_decl); | |
2295 | else | |
2296 | new_decl = build_function_decl_skip_args (old_decl, args_to_skip); | |
b5d36404 | 2297 | |
df0b8dfb | 2298 | /* Generate a new name for the new version. */ |
2299 | DECL_NAME (new_decl) = clone_function_name (old_decl, clone_name); | |
2300 | SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl)); | |
2301 | SET_DECL_RTL (new_decl, NULL); | |
2302 | ||
b5d36404 | 2303 | /* Create the new version's call-graph node. |
2304 | and update the edges of the new node. */ | |
2305 | new_version_node = | |
2306 | cgraph_copy_node_for_versioning (old_version_node, new_decl, | |
b06ab5fa | 2307 | redirect_callers, bbs_to_copy); |
b5d36404 | 2308 | |
2309 | /* Copy the OLD_VERSION_NODE function tree to the new version. */ | |
b06ab5fa | 2310 | tree_function_versioning (old_decl, new_decl, tree_map, false, args_to_skip, |
2311 | bbs_to_copy, new_entry_block); | |
b5d36404 | 2312 | |
a0c938f0 | 2313 | /* Update the new version's properties. |
e03a95e7 | 2314 | Make The new version visible only within this translation unit. Make sure |
2315 | that is not weak also. | |
a0c938f0 | 2316 | ??? We cannot use COMDAT linkage because there is no |
b5d36404 | 2317 | ABI support for this. */ |
6137cc9f | 2318 | cgraph_make_decl_local (new_version_node->decl); |
f014e39d | 2319 | DECL_VIRTUAL_P (new_version_node->decl) = 0; |
b5d36404 | 2320 | new_version_node->local.externally_visible = 0; |
2321 | new_version_node->local.local = 1; | |
2322 | new_version_node->lowered = true; | |
f014e39d | 2323 | |
e03a95e7 | 2324 | /* Update the call_expr on the edges to call the new version node. */ |
2325 | update_call_expr (new_version_node); | |
48e1416a | 2326 | |
50828ed8 | 2327 | cgraph_call_function_insertion_hooks (new_version_node); |
b5d36404 | 2328 | return new_version_node; |
2329 | } | |
469679ab | 2330 | |
ccf4ab6b | 2331 | /* Given virtual clone, turn it into actual clone. */ |
2332 | static void | |
2333 | cgraph_materialize_clone (struct cgraph_node *node) | |
2334 | { | |
2335 | bitmap_obstack_initialize (NULL); | |
e748b31d | 2336 | node->former_clone_of = node->clone_of->decl; |
2337 | if (node->clone_of->former_clone_of) | |
2338 | node->former_clone_of = node->clone_of->former_clone_of; | |
ccf4ab6b | 2339 | /* Copy the OLD_VERSION_NODE function tree to the new version. */ |
2340 | tree_function_versioning (node->clone_of->decl, node->decl, | |
2341 | node->clone.tree_map, true, | |
b06ab5fa | 2342 | node->clone.args_to_skip, NULL, NULL); |
e20422ea | 2343 | if (cgraph_dump_file) |
2344 | { | |
2345 | dump_function_to_file (node->clone_of->decl, cgraph_dump_file, dump_flags); | |
2346 | dump_function_to_file (node->decl, cgraph_dump_file, dump_flags); | |
2347 | } | |
ccf4ab6b | 2348 | |
2349 | /* Function is no longer clone. */ | |
2350 | if (node->next_sibling_clone) | |
2351 | node->next_sibling_clone->prev_sibling_clone = node->prev_sibling_clone; | |
2352 | if (node->prev_sibling_clone) | |
2353 | node->prev_sibling_clone->next_sibling_clone = node->next_sibling_clone; | |
2354 | else | |
2355 | node->clone_of->clones = node->next_sibling_clone; | |
2356 | node->next_sibling_clone = NULL; | |
2357 | node->prev_sibling_clone = NULL; | |
6d1cc52c | 2358 | if (!node->clone_of->analyzed && !node->clone_of->clones) |
7d6a1ec8 | 2359 | { |
2360 | cgraph_release_function_body (node->clone_of); | |
2361 | cgraph_node_remove_callees (node->clone_of); | |
2362 | ipa_remove_all_references (&node->clone_of->ref_list); | |
2363 | } | |
ccf4ab6b | 2364 | node->clone_of = NULL; |
2365 | bitmap_obstack_release (NULL); | |
2366 | } | |
2367 | ||
c596d830 | 2368 | /* If necessary, change the function declaration in the call statement |
2369 | associated with E so that it corresponds to the edge callee. */ | |
2370 | ||
2371 | gimple | |
2372 | cgraph_redirect_edge_call_stmt_to_callee (struct cgraph_edge *e) | |
2373 | { | |
2374 | tree decl = gimple_call_fndecl (e->call_stmt); | |
2375 | gimple new_stmt; | |
3fd0ca33 | 2376 | gimple_stmt_iterator gsi; |
2377 | bool gsi_computed = false; | |
1f449108 | 2378 | #ifdef ENABLE_CHECKING |
2379 | struct cgraph_node *node; | |
2380 | #endif | |
c596d830 | 2381 | |
1caef38b | 2382 | if (e->indirect_unknown_callee |
2383 | || decl == e->callee->decl | |
c596d830 | 2384 | /* Don't update call from same body alias to the real function. */ |
1caef38b | 2385 | || (decl && cgraph_get_node (decl) == cgraph_get_node (e->callee->decl))) |
c596d830 | 2386 | return e->call_stmt; |
2387 | ||
1f449108 | 2388 | #ifdef ENABLE_CHECKING |
1caef38b | 2389 | if (decl) |
2390 | { | |
2391 | node = cgraph_get_node (decl); | |
2392 | gcc_assert (!node || !node->clone.combined_args_to_skip); | |
2393 | } | |
1f449108 | 2394 | #endif |
e748b31d | 2395 | |
c596d830 | 2396 | if (cgraph_dump_file) |
2397 | { | |
2398 | fprintf (cgraph_dump_file, "updating call of %s/%i -> %s/%i: ", | |
2399 | cgraph_node_name (e->caller), e->caller->uid, | |
2400 | cgraph_node_name (e->callee), e->callee->uid); | |
2401 | print_gimple_stmt (cgraph_dump_file, e->call_stmt, 0, dump_flags); | |
e748b31d | 2402 | if (e->callee->clone.combined_args_to_skip) |
91aba934 | 2403 | { |
2404 | fprintf (cgraph_dump_file, " combined args to skip: "); | |
2405 | dump_bitmap (cgraph_dump_file, | |
2406 | e->callee->clone.combined_args_to_skip); | |
e748b31d | 2407 | } |
c596d830 | 2408 | } |
2409 | ||
9bab6a70 | 2410 | if (e->indirect_info && |
2411 | e->indirect_info->thunk_delta != 0 | |
3fd0ca33 | 2412 | && (!e->callee->clone.combined_args_to_skip |
2413 | || !bitmap_bit_p (e->callee->clone.combined_args_to_skip, 0))) | |
2414 | { | |
2415 | if (cgraph_dump_file) | |
9bab6a70 | 2416 | fprintf (cgraph_dump_file, " Thunk delta is " |
2417 | HOST_WIDE_INT_PRINT_DEC "\n", e->indirect_info->thunk_delta); | |
3fd0ca33 | 2418 | gsi = gsi_for_stmt (e->call_stmt); |
2419 | gsi_computed = true; | |
9bab6a70 | 2420 | gimple_adjust_this_by_delta (&gsi, |
2421 | build_int_cst (sizetype, | |
2422 | e->indirect_info->thunk_delta)); | |
2423 | e->indirect_info->thunk_delta = 0; | |
3fd0ca33 | 2424 | } |
2425 | ||
c596d830 | 2426 | if (e->callee->clone.combined_args_to_skip) |
91aba934 | 2427 | { |
092cd838 | 2428 | int lp_nr; |
91aba934 | 2429 | |
2430 | new_stmt | |
2431 | = gimple_call_copy_skip_args (e->call_stmt, | |
2432 | e->callee->clone.combined_args_to_skip); | |
75c7f5a5 | 2433 | gimple_call_set_fndecl (new_stmt, e->callee->decl); |
91aba934 | 2434 | |
2435 | if (gimple_vdef (new_stmt) | |
2436 | && TREE_CODE (gimple_vdef (new_stmt)) == SSA_NAME) | |
2437 | SSA_NAME_DEF_STMT (gimple_vdef (new_stmt)) = new_stmt; | |
2438 | ||
3fd0ca33 | 2439 | if (!gsi_computed) |
2440 | gsi = gsi_for_stmt (e->call_stmt); | |
9126b675 | 2441 | gsi_replace (&gsi, new_stmt, false); |
092cd838 | 2442 | /* We need to defer cleaning EH info on the new statement to |
2443 | fixup-cfg. We may not have dominator information at this point | |
2444 | and thus would end up with unreachable blocks and have no way | |
2445 | to communicate that we need to run CFG cleanup then. */ | |
2446 | lp_nr = lookup_stmt_eh_lp (e->call_stmt); | |
2447 | if (lp_nr != 0) | |
2448 | { | |
2449 | remove_stmt_from_eh_lp (e->call_stmt); | |
2450 | add_stmt_to_eh_lp (new_stmt, lp_nr); | |
2451 | } | |
91aba934 | 2452 | } |
c596d830 | 2453 | else |
75c7f5a5 | 2454 | { |
2455 | new_stmt = e->call_stmt; | |
2456 | gimple_call_set_fndecl (new_stmt, e->callee->decl); | |
2457 | update_stmt (new_stmt); | |
2458 | } | |
c596d830 | 2459 | |
c596d830 | 2460 | cgraph_set_call_stmt_including_clones (e->caller, e->call_stmt, new_stmt); |
2461 | ||
2462 | if (cgraph_dump_file) | |
2463 | { | |
2464 | fprintf (cgraph_dump_file, " updated to:"); | |
2465 | print_gimple_stmt (cgraph_dump_file, e->call_stmt, 0, dump_flags); | |
2466 | } | |
2467 | return new_stmt; | |
2468 | } | |
2469 | ||
ccf4ab6b | 2470 | /* Once all functions from compilation unit are in memory, produce all clones |
c596d830 | 2471 | and update all calls. We might also do this on demand if we don't want to |
2472 | bring all functions to memory prior compilation, but current WHOPR | |
2473 | implementation does that and it is is bit easier to keep everything right in | |
2474 | this order. */ | |
ccf4ab6b | 2475 | void |
2476 | cgraph_materialize_all_clones (void) | |
2477 | { | |
2478 | struct cgraph_node *node; | |
2479 | bool stabilized = false; | |
2480 | ||
2481 | if (cgraph_dump_file) | |
2482 | fprintf (cgraph_dump_file, "Materializing clones\n"); | |
2483 | #ifdef ENABLE_CHECKING | |
2484 | verify_cgraph (); | |
2485 | #endif | |
2486 | ||
2487 | /* We can also do topological order, but number of iterations should be | |
2488 | bounded by number of IPA passes since single IPA pass is probably not | |
2489 | going to create clones of clones it created itself. */ | |
2490 | while (!stabilized) | |
2491 | { | |
2492 | stabilized = true; | |
2493 | for (node = cgraph_nodes; node; node = node->next) | |
2494 | { | |
2495 | if (node->clone_of && node->decl != node->clone_of->decl | |
2496 | && !gimple_has_body_p (node->decl)) | |
2497 | { | |
2498 | if (gimple_has_body_p (node->clone_of->decl)) | |
2499 | { | |
2500 | if (cgraph_dump_file) | |
e20422ea | 2501 | { |
0a10fd82 | 2502 | fprintf (cgraph_dump_file, "cloning %s to %s\n", |
e20422ea | 2503 | cgraph_node_name (node->clone_of), |
2504 | cgraph_node_name (node)); | |
2505 | if (node->clone.tree_map) | |
2506 | { | |
2507 | unsigned int i; | |
2508 | fprintf (cgraph_dump_file, " replace map: "); | |
2509 | for (i = 0; i < VEC_length (ipa_replace_map_p, | |
2510 | node->clone.tree_map); | |
2511 | i++) | |
2512 | { | |
2513 | struct ipa_replace_map *replace_info; | |
2514 | replace_info = VEC_index (ipa_replace_map_p, | |
2515 | node->clone.tree_map, | |
2516 | i); | |
2517 | print_generic_expr (cgraph_dump_file, replace_info->old_tree, 0); | |
2518 | fprintf (cgraph_dump_file, " -> "); | |
2519 | print_generic_expr (cgraph_dump_file, replace_info->new_tree, 0); | |
2520 | fprintf (cgraph_dump_file, "%s%s;", | |
2521 | replace_info->replace_p ? "(replace)":"", | |
2522 | replace_info->ref_p ? "(ref)":""); | |
2523 | } | |
2524 | fprintf (cgraph_dump_file, "\n"); | |
2525 | } | |
2526 | if (node->clone.args_to_skip) | |
2527 | { | |
2528 | fprintf (cgraph_dump_file, " args_to_skip: "); | |
2529 | dump_bitmap (cgraph_dump_file, node->clone.args_to_skip); | |
2530 | } | |
2531 | if (node->clone.args_to_skip) | |
2532 | { | |
2533 | fprintf (cgraph_dump_file, " combined_args_to_skip:"); | |
2534 | dump_bitmap (cgraph_dump_file, node->clone.combined_args_to_skip); | |
2535 | } | |
2536 | } | |
ccf4ab6b | 2537 | cgraph_materialize_clone (node); |
a510bd8d | 2538 | stabilized = false; |
ccf4ab6b | 2539 | } |
ccf4ab6b | 2540 | } |
2541 | } | |
2542 | } | |
ee3f5fc0 | 2543 | for (node = cgraph_nodes; node; node = node->next) |
2544 | if (!node->analyzed && node->callees) | |
2545 | cgraph_node_remove_callees (node); | |
c596d830 | 2546 | if (cgraph_dump_file) |
2547 | fprintf (cgraph_dump_file, "Materialization Call site updates done.\n"); | |
947781ac | 2548 | #ifdef ENABLE_CHECKING |
2549 | verify_cgraph (); | |
2550 | #endif | |
ccf4ab6b | 2551 | cgraph_remove_unreachable_nodes (false, cgraph_dump_file); |
2552 | } | |
2553 | ||
a861fe52 | 2554 | #include "gt-cgraphunit.h" |