]>
Commit | Line | Data |
---|---|---|
3b22db66 | 1 | /* Interprocedural analyses. |
d353bf18 | 2 | Copyright (C) 2005-2015 Free Software Foundation, Inc. |
3b22db66 | 3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8c4c00c1 | 8 | Software Foundation; either version 3, or (at your option) any later |
3b22db66 | 9 | version. |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
8c4c00c1 | 17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
3b22db66 | 19 | |
20 | #ifndef IPA_PROP_H | |
21 | #define IPA_PROP_H | |
22 | ||
3b22db66 | 23 | /* The following definitions and interfaces are used by |
ba3a7ba0 | 24 | interprocedural analyses or parameters. */ |
25 | ||
096295f6 | 26 | #define IPA_UNDESCRIBED_USE -1 |
27 | ||
ba3a7ba0 | 28 | /* ipa-prop.c stuff (ipa-cp, indirect inlining): */ |
3b22db66 | 29 | |
1917e945 | 30 | /* A jump function for a callsite represents the values passed as actual |
821d0e0f | 31 | arguments of the callsite. They were originally proposed in a paper called |
32 | "Interprocedural Constant Propagation", by David Callahan, Keith D Cooper, | |
33 | Ken Kennedy, Linda Torczon in Comp86, pg 152-161. There are three main | |
34 | types of values : | |
5215027d | 35 | |
36 | Pass-through - the caller's formal parameter is passed as an actual | |
37 | argument, possibly one simple operation performed on it. | |
38 | Constant - a constant (is_gimple_ip_invariant)is passed as an actual | |
39 | argument. | |
40 | Unknown - neither of the above. | |
41 | ||
6378ffb3 | 42 | IPA_JF_ANCESTOR is a special pass-through jump function, which means that |
43 | the result is an address of a part of the object pointed to by the formal | |
44 | parameter to which the function refers. It is mainly intended to represent | |
47ae02b7 | 45 | getting addresses of ancestor fields in C++ |
6378ffb3 | 46 | (e.g. &this_1(D)->D.1766.D.1756). Note that if the original pointer is |
47 | NULL, ancestor jump function must behave like a simple pass-through. | |
48 | ||
49 | Other pass-through functions can either simply pass on an unchanged formal | |
50 | parameter or can apply one simple binary operation to it (such jump | |
51 | functions are called polynomial). | |
52 | ||
6378ffb3 | 53 | Jump functions are computed in ipa-prop.c by function |
54 | update_call_notes_after_inlining. Some information can be lost and jump | |
55 | functions degraded accordingly when inlining, see | |
56 | update_call_notes_after_inlining in the same file. */ | |
5215027d | 57 | |
3b22db66 | 58 | enum jump_func_type |
59 | { | |
ba3a7ba0 | 60 | IPA_JF_UNKNOWN = 0, /* newly allocated and zeroed jump functions default */ |
6378ffb3 | 61 | IPA_JF_CONST, /* represented by field costant */ |
6378ffb3 | 62 | IPA_JF_PASS_THROUGH, /* represented by field pass_through */ |
63 | IPA_JF_ANCESTOR /* represented by field ancestor */ | |
3b22db66 | 64 | }; |
65 | ||
096295f6 | 66 | struct ipa_cst_ref_desc; |
67 | ||
68 | /* Structure holding data required to describe a constant jump function. */ | |
69 | struct GTY(()) ipa_constant_data | |
70 | { | |
71 | /* THe value of the constant. */ | |
72 | tree value; | |
73 | /* Pointer to the structure that describes the reference. */ | |
74 | struct ipa_cst_ref_desc GTY((skip)) *rdesc; | |
75 | }; | |
76 | ||
5215027d | 77 | /* Structure holding data required to describe a pass-through jump function. */ |
78 | ||
8867b500 | 79 | struct GTY(()) ipa_pass_through_data |
5215027d | 80 | { |
81 | /* If an operation is to be performed on the original parameter, this is the | |
82 | second (constant) operand. */ | |
83 | tree operand; | |
84 | /* Number of the caller's formal parameter being passed. */ | |
85 | int formal_id; | |
86 | /* Operation that is performed on the argument before it is passed on. | |
87 | NOP_EXPR means no operation. Otherwise oper must be a simple binary | |
88 | arithmetic operation where the caller's parameter is the first operand and | |
89 | operand field from this structure is the second one. */ | |
90 | enum tree_code operation; | |
0d491188 | 91 | /* When the passed value is a pointer, it is set to true only when we are |
92 | certain that no write to the object it points to has occurred since the | |
93 | caller functions started execution, except for changes noted in the | |
94 | aggregate part of the jump function (see description of | |
95 | ipa_agg_jump_function). The flag is used only when the operation is | |
96 | NOP_EXPR. */ | |
ad4a8b28 | 97 | unsigned agg_preserved : 1; |
5215027d | 98 | }; |
99 | ||
6378ffb3 | 100 | /* Structure holding data required to describe an ancestor pass-through |
101 | jump function. */ | |
5215027d | 102 | |
8867b500 | 103 | struct GTY(()) ipa_ancestor_jf_data |
5215027d | 104 | { |
105 | /* Offset of the field representing the ancestor. */ | |
106 | HOST_WIDE_INT offset; | |
5215027d | 107 | /* Number of the caller's formal parameter being passed. */ |
108 | int formal_id; | |
0d491188 | 109 | /* Flag with the same meaning like agg_preserve in ipa_pass_through_data. */ |
ad4a8b28 | 110 | unsigned agg_preserved : 1; |
5215027d | 111 | }; |
112 | ||
0d491188 | 113 | /* An element in an aggegate part of a jump function describing a known value |
114 | at a given offset. When it is part of a pass-through jump function with | |
115 | agg_preserved set or an ancestor jump function with agg_preserved set, all | |
116 | unlisted positions are assumed to be preserved but the value can be a type | |
117 | node, which means that the particular piece (starting at offset and having | |
118 | the size of the type) is clobbered with an unknown value. When | |
119 | agg_preserved is false or the type of the containing jump function is | |
120 | different, all unlisted parts are assumed to be unknown and all values must | |
a04e8d62 | 121 | fulfill is_gimple_ip_invariant. */ |
0d491188 | 122 | |
b3e7c666 | 123 | struct GTY(()) ipa_agg_jf_item |
0d491188 | 124 | { |
125 | /* The offset at which the known value is located within the aggregate. */ | |
126 | HOST_WIDE_INT offset; | |
127 | ||
128 | /* The known constant or type if this is a clobber. */ | |
129 | tree value; | |
b3e7c666 | 130 | }; |
0d491188 | 131 | |
0d491188 | 132 | |
133 | /* Aggregate jump function - i.e. description of contents of aggregates passed | |
134 | either by reference or value. */ | |
135 | ||
136 | struct GTY(()) ipa_agg_jump_function | |
f8daee9b | 137 | { |
0d491188 | 138 | /* Description of the individual items. */ |
b3e7c666 | 139 | vec<ipa_agg_jf_item, va_gc> *items; |
0d491188 | 140 | /* True if the data was passed by reference (as opposed to by value). */ |
141 | bool by_ref; | |
f8daee9b | 142 | }; |
143 | ||
0d491188 | 144 | typedef struct ipa_agg_jump_function *ipa_agg_jump_function_p; |
0d491188 | 145 | |
ae7b7bc8 | 146 | /* Info about pointer alignments. */ |
147 | struct GTY(()) ipa_alignment | |
148 | { | |
149 | /* The data fields below are valid only if known is true. */ | |
150 | bool known; | |
151 | /* See ptr_info_def and get_pointer_alignment_1 for description of these | |
152 | two. */ | |
153 | unsigned align; | |
154 | unsigned misalign; | |
155 | }; | |
156 | ||
1917e945 | 157 | /* A jump function for a callsite represents the values passed as actual |
158 | arguments of the callsite. See enum jump_func_type for the various | |
3b22db66 | 159 | types of jump functions supported. */ |
b3e7c666 | 160 | struct GTY (()) ipa_jump_func |
3b22db66 | 161 | { |
0d491188 | 162 | /* Aggregate contants description. See struct ipa_agg_jump_function and its |
163 | description. */ | |
164 | struct ipa_agg_jump_function agg; | |
165 | ||
ae7b7bc8 | 166 | /* Information about alignment of pointers. */ |
167 | struct ipa_alignment alignment; | |
168 | ||
3b22db66 | 169 | enum jump_func_type type; |
8867b500 | 170 | /* Represents a value of a jump function. pass_through is used only in jump |
171 | function context. constant represents the actual constant in constant jump | |
172 | functions and member_cst holds constant c++ member functions. */ | |
173 | union jump_func_value | |
174 | { | |
096295f6 | 175 | struct ipa_constant_data GTY ((tag ("IPA_JF_CONST"))) constant; |
8867b500 | 176 | struct ipa_pass_through_data GTY ((tag ("IPA_JF_PASS_THROUGH"))) pass_through; |
177 | struct ipa_ancestor_jf_data GTY ((tag ("IPA_JF_ANCESTOR"))) ancestor; | |
8867b500 | 178 | } GTY ((desc ("%1.type"))) value; |
b3e7c666 | 179 | }; |
b22832dc | 180 | |
3b22db66 | 181 | |
4fa83f96 | 182 | /* Return the constant stored in a constant jump functin JFUNC. */ |
183 | ||
184 | static inline tree | |
185 | ipa_get_jf_constant (struct ipa_jump_func *jfunc) | |
186 | { | |
187 | gcc_checking_assert (jfunc->type == IPA_JF_CONST); | |
096295f6 | 188 | return jfunc->value.constant.value; |
189 | } | |
190 | ||
191 | static inline struct ipa_cst_ref_desc * | |
192 | ipa_get_jf_constant_rdesc (struct ipa_jump_func *jfunc) | |
193 | { | |
194 | gcc_checking_assert (jfunc->type == IPA_JF_CONST); | |
195 | return jfunc->value.constant.rdesc; | |
4fa83f96 | 196 | } |
197 | ||
198 | /* Return the operand of a pass through jmp function JFUNC. */ | |
199 | ||
200 | static inline tree | |
201 | ipa_get_jf_pass_through_operand (struct ipa_jump_func *jfunc) | |
202 | { | |
203 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
204 | return jfunc->value.pass_through.operand; | |
205 | } | |
206 | ||
207 | /* Return the number of the caller's formal parameter that a pass through jump | |
208 | function JFUNC refers to. */ | |
209 | ||
210 | static inline int | |
211 | ipa_get_jf_pass_through_formal_id (struct ipa_jump_func *jfunc) | |
212 | { | |
213 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
214 | return jfunc->value.pass_through.formal_id; | |
215 | } | |
216 | ||
217 | /* Return operation of a pass through jump function JFUNC. */ | |
218 | ||
219 | static inline enum tree_code | |
220 | ipa_get_jf_pass_through_operation (struct ipa_jump_func *jfunc) | |
221 | { | |
222 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
223 | return jfunc->value.pass_through.operation; | |
224 | } | |
225 | ||
ad4a8b28 | 226 | /* Return the agg_preserved flag of a pass through jump function JFUNC. */ |
0d491188 | 227 | |
228 | static inline bool | |
229 | ipa_get_jf_pass_through_agg_preserved (struct ipa_jump_func *jfunc) | |
230 | { | |
231 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
232 | return jfunc->value.pass_through.agg_preserved; | |
233 | } | |
234 | ||
245ab191 | 235 | /* Return true if pass through jump function JFUNC preserves type |
236 | information. */ | |
ad4a8b28 | 237 | |
238 | static inline bool | |
239 | ipa_get_jf_pass_through_type_preserved (struct ipa_jump_func *jfunc) | |
240 | { | |
241 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
245ab191 | 242 | return jfunc->value.pass_through.agg_preserved; |
ad4a8b28 | 243 | } |
244 | ||
4fa83f96 | 245 | /* Return the offset of an ancestor jump function JFUNC. */ |
246 | ||
247 | static inline HOST_WIDE_INT | |
248 | ipa_get_jf_ancestor_offset (struct ipa_jump_func *jfunc) | |
249 | { | |
250 | gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
251 | return jfunc->value.ancestor.offset; | |
252 | } | |
253 | ||
4fa83f96 | 254 | /* Return the number of the caller's formal parameter that an ancestor jump |
255 | function JFUNC refers to. */ | |
256 | ||
257 | static inline int | |
258 | ipa_get_jf_ancestor_formal_id (struct ipa_jump_func *jfunc) | |
259 | { | |
260 | gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
261 | return jfunc->value.ancestor.formal_id; | |
262 | } | |
263 | ||
ad4a8b28 | 264 | /* Return the agg_preserved flag of an ancestor jump function JFUNC. */ |
4fa83f96 | 265 | |
0d491188 | 266 | static inline bool |
267 | ipa_get_jf_ancestor_agg_preserved (struct ipa_jump_func *jfunc) | |
4fa83f96 | 268 | { |
0d491188 | 269 | gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); |
270 | return jfunc->value.ancestor.agg_preserved; | |
4fa83f96 | 271 | } |
272 | ||
245ab191 | 273 | /* Return true if ancestor jump function JFUNC presrves type information. */ |
ad4a8b28 | 274 | |
275 | static inline bool | |
276 | ipa_get_jf_ancestor_type_preserved (struct ipa_jump_func *jfunc) | |
277 | { | |
278 | gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
245ab191 | 279 | return jfunc->value.ancestor.agg_preserved; |
ad4a8b28 | 280 | } |
281 | ||
821d0e0f | 282 | /* Summary describing a single formal parameter. */ |
6378ffb3 | 283 | |
3f2ff969 | 284 | struct ipa_param_descriptor |
285 | { | |
3f2ff969 | 286 | /* PARAM_DECL of this parameter. */ |
287 | tree decl; | |
096295f6 | 288 | /* If all uses of the parameter are described by ipa-prop structures, this |
289 | says how many there are. If any use could not be described by means of | |
290 | ipa-prop structures, this is IPA_UNDESCRIBED_USE. */ | |
291 | int controlled_uses; | |
09ab6335 | 292 | unsigned int move_cost : 31; |
bc1b408a | 293 | /* The parameter is used. */ |
294 | unsigned used : 1; | |
3f2ff969 | 295 | }; |
296 | ||
3889f2e2 | 297 | /* ipa_node_params stores information related to formal parameters of functions |
298 | and some other information for interprocedural passes that operate on | |
299 | parameters (such as ipa-cp). */ | |
821d0e0f | 300 | |
3889f2e2 | 301 | struct ipa_node_params |
3b22db66 | 302 | { |
2cc80ac3 | 303 | ~ipa_node_params (); |
304 | ||
821d0e0f | 305 | /* Information about individual formal parameters that are gathered when |
306 | summaries are generated. */ | |
b3e7c666 | 307 | vec<ipa_param_descriptor> descriptors; |
821d0e0f | 308 | /* Pointer to an array of structures describing individual formal |
309 | parameters. */ | |
803a7988 | 310 | struct ipcp_param_lattices *lattices; |
821d0e0f | 311 | /* Only for versioned nodes this field would not be NULL, |
312 | it points to the node that IPA cp cloned from. */ | |
313 | struct cgraph_node *ipcp_orig_node; | |
245ab191 | 314 | /* If this node is an ipa-cp clone, these are the known constants that |
315 | describe what it has been specialized for. */ | |
316 | vec<tree> known_csts; | |
317 | /* If this node is an ipa-cp clone, these are the known polymorphic contexts | |
318 | that describe what it has been specialized for. */ | |
319 | vec<ipa_polymorphic_call_context> known_contexts; | |
24430d08 | 320 | /* Whether the param uses analysis and jump function computation has already |
321 | been performed. */ | |
322 | unsigned analysis_done : 1; | |
821d0e0f | 323 | /* Whether the function is enqueued in ipa-cp propagation stack. */ |
609c710b | 324 | unsigned node_enqueued : 1; |
821d0e0f | 325 | /* Whether we should create a specialized version based on values that are |
326 | known to be constant in all contexts. */ | |
87228246 | 327 | unsigned do_clone_for_all_contexts : 1; |
328 | /* Set if this is an IPA-CP clone for all contexts. */ | |
329 | unsigned is_all_contexts_clone : 1; | |
821d0e0f | 330 | /* Node has been completely replaced by clones and will be removed after |
331 | ipa-cp is finished. */ | |
332 | unsigned node_dead : 1; | |
39fcd838 | 333 | /* Node is involved in a recursion, potentionally indirect. */ |
334 | unsigned node_within_scc : 1; | |
335 | /* Node is calling a private function called only once. */ | |
336 | unsigned node_calling_single_call : 1; | |
3b22db66 | 337 | }; |
338 | ||
1a673ff0 | 339 | /* Intermediate information that we get from alias analysis about a particular |
340 | parameter in a particular basic_block. When a parameter or the memory it | |
9ea91b78 | 341 | references is marked modified, we use that information in all dominated |
342 | blocks without consulting alias analysis oracle. */ | |
1a673ff0 | 343 | |
9ea91b78 | 344 | struct ipa_param_aa_status |
1a673ff0 | 345 | { |
346 | /* Set when this structure contains meaningful information. If not, the | |
347 | structure describing a dominating BB should be used instead. */ | |
348 | bool valid; | |
349 | ||
350 | /* Whether we have seen something which might have modified the data in | |
351 | question. PARM is for the parameter itself, REF is for data it points to | |
352 | but using the alias type of individual accesses and PT is the same thing | |
353 | but for computing aggregate pass-through functions using a very inclusive | |
354 | ao_ref. */ | |
355 | bool parm_modified, ref_modified, pt_modified; | |
356 | }; | |
357 | ||
358 | /* Information related to a given BB that used only when looking at function | |
359 | body. */ | |
360 | ||
361 | struct ipa_bb_info | |
362 | { | |
363 | /* Call graph edges going out of this BB. */ | |
364 | vec<cgraph_edge *> cg_edges; | |
365 | /* Alias analysis statuses of each formal parameter at this bb. */ | |
9ea91b78 | 366 | vec<ipa_param_aa_status> param_aa_statuses; |
1a673ff0 | 367 | }; |
368 | ||
369 | /* Structure with global information that is only used when looking at function | |
370 | body. */ | |
371 | ||
9ea91b78 | 372 | struct ipa_func_body_info |
1a673ff0 | 373 | { |
374 | /* The node that is being analyzed. */ | |
375 | cgraph_node *node; | |
376 | ||
377 | /* Its info. */ | |
378 | struct ipa_node_params *info; | |
379 | ||
380 | /* Information about individual BBs. */ | |
381 | vec<ipa_bb_info> bb_infos; | |
382 | ||
383 | /* Number of parameters. */ | |
384 | int param_count; | |
385 | ||
386 | /* Number of statements already walked by when analyzing this function. */ | |
387 | unsigned int aa_walked; | |
388 | }; | |
389 | ||
3889f2e2 | 390 | /* ipa_node_params access functions. Please use these to access fields that |
391 | are or will be shared among various passes. */ | |
392 | ||
3889f2e2 | 393 | /* Return the number of formal parameters. */ |
1917e945 | 394 | |
3889f2e2 | 395 | static inline int |
396 | ipa_get_param_count (struct ipa_node_params *info) | |
397 | { | |
f1f41a6c | 398 | return info->descriptors.length (); |
3889f2e2 | 399 | } |
400 | ||
3f2ff969 | 401 | /* Return the declaration of Ith formal parameter of the function corresponding |
402 | to INFO. Note there is no setter function as this array is built just once | |
403 | using ipa_initialize_node_params. */ | |
1917e945 | 404 | |
3889f2e2 | 405 | static inline tree |
3f2ff969 | 406 | ipa_get_param (struct ipa_node_params *info, int i) |
3889f2e2 | 407 | { |
09ab6335 | 408 | gcc_checking_assert (!flag_wpa); |
f1f41a6c | 409 | return info->descriptors[i].decl; |
bc1b408a | 410 | } |
411 | ||
09ab6335 | 412 | /* Return the move cost of Ith formal parameter of the function corresponding |
413 | to INFO. */ | |
414 | ||
415 | static inline int | |
416 | ipa_get_param_move_cost (struct ipa_node_params *info, int i) | |
417 | { | |
418 | return info->descriptors[i].move_cost; | |
419 | } | |
420 | ||
821d0e0f | 421 | /* Set the used flag corresponding to the Ith formal parameter of the function |
422 | associated with INFO to VAL. */ | |
1caef38b | 423 | |
821d0e0f | 424 | static inline void |
425 | ipa_set_param_used (struct ipa_node_params *info, int i, bool val) | |
1caef38b | 426 | { |
f1f41a6c | 427 | info->descriptors[i].used = val; |
1caef38b | 428 | } |
429 | ||
096295f6 | 430 | /* Return how many uses described by ipa-prop a parameter has or |
431 | IPA_UNDESCRIBED_USE if there is a use that is not described by these | |
432 | structures. */ | |
433 | static inline int | |
434 | ipa_get_controlled_uses (struct ipa_node_params *info, int i) | |
435 | { | |
072ec6eb | 436 | /* FIXME: introducing speuclation causes out of bounds access here. */ |
437 | if (info->descriptors.length () > (unsigned)i) | |
438 | return info->descriptors[i].controlled_uses; | |
439 | return IPA_UNDESCRIBED_USE; | |
096295f6 | 440 | } |
441 | ||
442 | /* Set the controlled counter of a given parameter. */ | |
443 | ||
444 | static inline void | |
445 | ipa_set_controlled_uses (struct ipa_node_params *info, int i, int val) | |
446 | { | |
447 | info->descriptors[i].controlled_uses = val; | |
448 | } | |
449 | ||
821d0e0f | 450 | /* Return the used flag corresponding to the Ith formal parameter of the |
451 | function associated with INFO. */ | |
1caef38b | 452 | |
453 | static inline bool | |
821d0e0f | 454 | ipa_is_param_used (struct ipa_node_params *info, int i) |
1caef38b | 455 | { |
f1f41a6c | 456 | return info->descriptors[i].used; |
1caef38b | 457 | } |
458 | ||
803a7988 | 459 | /* Information about replacements done in aggregates for a given node (each |
460 | node has its linked list). */ | |
461 | struct GTY(()) ipa_agg_replacement_value | |
462 | { | |
463 | /* Next item in the linked list. */ | |
464 | struct ipa_agg_replacement_value *next; | |
465 | /* Offset within the aggregate. */ | |
466 | HOST_WIDE_INT offset; | |
467 | /* The constant value. */ | |
468 | tree value; | |
469 | /* The paramter index. */ | |
470 | int index; | |
c42e4f2e | 471 | /* Whether the value was passed by reference. */ |
472 | bool by_ref; | |
803a7988 | 473 | }; |
474 | ||
ae7b7bc8 | 475 | /* Structure holding information for the transformation phase of IPA-CP. */ |
476 | ||
477 | struct GTY(()) ipcp_transformation_summary | |
478 | { | |
479 | /* Linked list of known aggregate values. */ | |
480 | ipa_agg_replacement_value *agg_values; | |
481 | /* Alignment information for pointers. */ | |
482 | vec<ipa_alignment, va_gc> *alignments; | |
483 | }; | |
803a7988 | 484 | |
485 | void ipa_set_node_agg_value_chain (struct cgraph_node *node, | |
486 | struct ipa_agg_replacement_value *aggvals); | |
ae7b7bc8 | 487 | void ipcp_grow_transformations_if_necessary (void); |
803a7988 | 488 | |
10d560f3 | 489 | /* ipa_edge_args stores information related to a callsite and particularly its |
490 | arguments. It can be accessed by the IPA_EDGE_REF macro. */ | |
b3e7c666 | 491 | struct GTY(()) ipa_edge_args |
3b22db66 | 492 | { |
b22832dc | 493 | /* Vector of the callsite's jump function of each parameter. */ |
b3e7c666 | 494 | vec<ipa_jump_func, va_gc> *jump_functions; |
072ec6eb | 495 | vec<ipa_polymorphic_call_context, va_gc> *polymorphic_call_contexts; |
b3e7c666 | 496 | }; |
3b22db66 | 497 | |
3889f2e2 | 498 | /* ipa_edge_args access functions. Please use these to access fields that |
499 | are or will be shared among various passes. */ | |
500 | ||
3889f2e2 | 501 | /* Return the number of actual arguments. */ |
1917e945 | 502 | |
3889f2e2 | 503 | static inline int |
504 | ipa_get_cs_argument_count (struct ipa_edge_args *args) | |
505 | { | |
f1f41a6c | 506 | return vec_safe_length (args->jump_functions); |
3889f2e2 | 507 | } |
508 | ||
509 | /* Returns a pointer to the jump function for the ith argument. Please note | |
510 | there is no setter function as jump functions are all set up in | |
511 | ipa_compute_jump_functions. */ | |
1917e945 | 512 | |
3889f2e2 | 513 | static inline struct ipa_jump_func * |
514 | ipa_get_ith_jump_func (struct ipa_edge_args *args, int i) | |
515 | { | |
f1f41a6c | 516 | return &(*args->jump_functions)[i]; |
3889f2e2 | 517 | } |
518 | ||
072ec6eb | 519 | /* Returns a pointer to the polymorphic call context for the ith argument. |
520 | NULL if contexts are not computed. */ | |
521 | static inline struct ipa_polymorphic_call_context * | |
522 | ipa_get_ith_polymorhic_call_context (struct ipa_edge_args *args, int i) | |
523 | { | |
524 | if (!args->polymorphic_call_contexts) | |
525 | return NULL; | |
526 | return &(*args->polymorphic_call_contexts)[i]; | |
527 | } | |
528 | ||
b4bae7a0 | 529 | /* Function summary for ipa_node_params. */ |
2cc80ac3 | 530 | class ipa_node_params_t: public function_summary <ipa_node_params *> |
531 | { | |
532 | public: | |
533 | ipa_node_params_t (symbol_table *table): | |
534 | function_summary<ipa_node_params *> (table) { } | |
545eff8f | 535 | |
2cc80ac3 | 536 | /* Hook that is called by summary when a node is duplicated. */ |
537 | virtual void duplicate (cgraph_node *node, | |
538 | cgraph_node *node2, | |
539 | ipa_node_params *data, | |
540 | ipa_node_params *data2); | |
541 | }; | |
542 | ||
543 | /* Function summary where the parameter infos are actually stored. */ | |
544 | extern ipa_node_params_t *ipa_node_params_sum; | |
ae7b7bc8 | 545 | /* Vector of IPA-CP transformation data for each clone. */ |
546 | extern GTY(()) vec<ipcp_transformation_summary, va_gc> *ipcp_transformations; | |
545eff8f | 547 | /* Vector where the parameter infos are actually stored. */ |
b3e7c666 | 548 | extern GTY(()) vec<ipa_edge_args, va_gc> *ipa_edge_args_vector; |
545eff8f | 549 | |
550 | /* Return the associated parameter/argument info corresponding to the given | |
551 | node/edge. */ | |
2cc80ac3 | 552 | #define IPA_NODE_REF(NODE) (ipa_node_params_sum->get (NODE)) |
f1f41a6c | 553 | #define IPA_EDGE_REF(EDGE) (&(*ipa_edge_args_vector)[(EDGE)->uid]) |
545eff8f | 554 | /* This macro checks validity of index returned by |
555 | ipa_get_param_decl_index function. */ | |
556 | #define IS_VALID_JUMP_FUNC_INDEX(I) ((I) != -1) | |
557 | ||
558 | /* Creating and freeing ipa_node_params and ipa_edge_args. */ | |
559 | void ipa_create_all_node_params (void); | |
560 | void ipa_create_all_edge_args (void); | |
561 | void ipa_free_edge_args_substructures (struct ipa_edge_args *); | |
545eff8f | 562 | void ipa_free_all_node_params (void); |
563 | void ipa_free_all_edge_args (void); | |
799c8711 | 564 | void ipa_free_all_structures_after_ipa_cp (void); |
565 | void ipa_free_all_structures_after_iinln (void); | |
2cc80ac3 | 566 | |
545eff8f | 567 | void ipa_register_cgraph_hooks (void); |
09809ecc | 568 | int count_formal_params (tree fndecl); |
545eff8f | 569 | |
570 | /* This function ensures the array of node param infos is big enough to | |
1917e945 | 571 | accommodate a structure for all nodes and reallocates it if not. */ |
572 | ||
545eff8f | 573 | static inline void |
574 | ipa_check_create_node_params (void) | |
575 | { | |
2cc80ac3 | 576 | if (!ipa_node_params_sum) |
577 | ipa_node_params_sum = new ipa_node_params_t (symtab); | |
545eff8f | 578 | } |
579 | ||
1917e945 | 580 | /* This function ensures the array of edge arguments infos is big enough to |
581 | accommodate a structure for all edges and reallocates it if not. */ | |
582 | ||
545eff8f | 583 | static inline void |
584 | ipa_check_create_edge_args (void) | |
585 | { | |
35ee1c66 | 586 | if (vec_safe_length (ipa_edge_args_vector) |
587 | <= (unsigned) symtab->edges_max_uid) | |
588 | vec_safe_grow_cleared (ipa_edge_args_vector, symtab->edges_max_uid + 1); | |
545eff8f | 589 | } |
590 | ||
1917e945 | 591 | /* Returns true if the array of edge infos is large enough to accommodate an |
86c96e3a | 592 | info for EDGE. The main purpose of this function is that debug dumping |
593 | function can check info availability without causing reallocations. */ | |
1917e945 | 594 | |
86c96e3a | 595 | static inline bool |
596 | ipa_edge_args_info_available_for_edge_p (struct cgraph_edge *edge) | |
597 | { | |
f1f41a6c | 598 | return ((unsigned) edge->uid < vec_safe_length (ipa_edge_args_vector)); |
86c96e3a | 599 | } |
600 | ||
ae7b7bc8 | 601 | static inline ipcp_transformation_summary * |
602 | ipcp_get_transformation_summary (cgraph_node *node) | |
603 | { | |
604 | if ((unsigned) node->uid >= vec_safe_length (ipcp_transformations)) | |
605 | return NULL; | |
606 | return &(*ipcp_transformations)[node->uid]; | |
607 | } | |
608 | ||
803a7988 | 609 | /* Return the aggregate replacements for NODE, if there are any. */ |
610 | ||
611 | static inline struct ipa_agg_replacement_value * | |
ae7b7bc8 | 612 | ipa_get_agg_replacements_for_node (cgraph_node *node) |
803a7988 | 613 | { |
ae7b7bc8 | 614 | ipcp_transformation_summary *ts = ipcp_get_transformation_summary (node); |
615 | return ts ? ts->agg_values : NULL; | |
803a7988 | 616 | } |
617 | ||
3f2ff969 | 618 | /* Function formal parameters related computations. */ |
619 | void ipa_initialize_node_params (struct cgraph_node *node); | |
3f2ff969 | 620 | bool ipa_propagate_indirect_call_infos (struct cgraph_edge *cs, |
415d1b9a | 621 | vec<cgraph_edge *> *new_edges); |
3b22db66 | 622 | |
1caef38b | 623 | /* Indirect edge and binfo processing. */ |
20da2013 | 624 | tree ipa_get_indirect_edge_target (struct cgraph_edge *ie, |
f1f41a6c | 625 | vec<tree> , |
245ab191 | 626 | vec<ipa_polymorphic_call_context>, |
f21a87d8 | 627 | vec<ipa_agg_jump_function_p>, |
628 | bool *); | |
072ec6eb | 629 | struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree, |
630 | bool speculative = false); | |
3bc62a51 | 631 | tree ipa_impossible_devirt_target (struct cgraph_edge *, tree); |
1caef38b | 632 | |
821d0e0f | 633 | /* Functions related to both. */ |
634 | void ipa_analyze_node (struct cgraph_node *); | |
1caef38b | 635 | |
0d491188 | 636 | /* Aggregate jump function related functions. */ |
637 | tree ipa_find_agg_cst_for_param (struct ipa_agg_jump_function *, HOST_WIDE_INT, | |
638 | bool); | |
9ea91b78 | 639 | bool ipa_load_from_parm_agg (struct ipa_func_body_info *, |
1a673ff0 | 640 | vec<ipa_param_descriptor>, gimple, tree, int *, |
641 | HOST_WIDE_INT *, HOST_WIDE_INT *, bool *); | |
0d491188 | 642 | |
3b22db66 | 643 | /* Debugging interface. */ |
11b73810 | 644 | void ipa_print_node_params (FILE *, struct cgraph_node *node); |
645 | void ipa_print_all_params (FILE *); | |
f8daee9b | 646 | void ipa_print_node_jump_functions (FILE *f, struct cgraph_node *node); |
647 | void ipa_print_all_jump_functions (FILE * f); | |
821d0e0f | 648 | void ipcp_verify_propagated_values (void); |
649 | ||
8361d32f | 650 | template <typename value> |
651 | class ipcp_value; | |
652 | ||
e16712b1 | 653 | extern object_allocator<ipcp_value<tree> > ipcp_cst_values_pool; |
654 | extern object_allocator<ipcp_value<ipa_polymorphic_call_context> > | |
8361d32f | 655 | ipcp_poly_ctx_values_pool; |
656 | ||
657 | template <typename valtype> | |
658 | class ipcp_value_source; | |
659 | ||
e16712b1 | 660 | extern object_allocator<ipcp_value_source<tree> > ipcp_sources_pool; |
8361d32f | 661 | |
662 | class ipcp_agg_lattice; | |
663 | ||
e16712b1 | 664 | extern object_allocator<ipcp_agg_lattice> ipcp_agg_lattice_pool; |
3b22db66 | 665 | |
6bcfabf2 | 666 | /* Operation to be performed for the parameter in ipa_parm_adjustment |
667 | below. */ | |
668 | enum ipa_parm_op { | |
669 | IPA_PARM_OP_NONE, | |
670 | ||
671 | /* This describes a brand new parameter. | |
672 | ||
673 | The field `type' should be set to the new type, `arg_prefix' | |
674 | should be set to the string prefix for the new DECL_NAME, and | |
675 | `new_decl' will ultimately hold the newly created argument. */ | |
676 | IPA_PARM_OP_NEW, | |
677 | ||
678 | /* This new parameter is an unmodified parameter at index base_index. */ | |
679 | IPA_PARM_OP_COPY, | |
680 | ||
681 | /* This adjustment describes a parameter that is about to be removed | |
682 | completely. Most users will probably need to book keep those so that they | |
683 | don't leave behinfd any non default def ssa names belonging to them. */ | |
684 | IPA_PARM_OP_REMOVE | |
685 | }; | |
686 | ||
547f1802 | 687 | /* Structure to describe transformations of formal parameters and actual |
688 | arguments. Each instance describes one new parameter and they are meant to | |
689 | be stored in a vector. Additionally, most users will probably want to store | |
690 | adjustments about parameters that are being removed altogether so that SSA | |
691 | names belonging to them can be replaced by SSA names of an artificial | |
692 | variable. */ | |
693 | struct ipa_parm_adjustment | |
694 | { | |
695 | /* The original PARM_DECL itself, helpful for processing of the body of the | |
696 | function itself. Intended for traversing function bodies. | |
697 | ipa_modify_formal_parameters, ipa_modify_call_arguments and | |
698 | ipa_combine_adjustments ignore this and use base_index. | |
699 | ipa_modify_formal_parameters actually sets this. */ | |
700 | tree base; | |
701 | ||
702 | /* Type of the new parameter. However, if by_ref is true, the real type will | |
703 | be a pointer to this type. */ | |
704 | tree type; | |
705 | ||
14c9496e | 706 | /* Alias refrerence type to be used in MEM_REFs when adjusting caller |
707 | arguments. */ | |
708 | tree alias_ptr_type; | |
709 | ||
6bcfabf2 | 710 | /* The new declaration when creating/replacing a parameter. Created |
711 | by ipa_modify_formal_parameters, useful for functions modifying | |
712 | the body accordingly. For brand new arguments, this is the newly | |
713 | created argument. */ | |
714 | tree new_decl; | |
547f1802 | 715 | |
716 | /* New declaration of a substitute variable that we may use to replace all | |
717 | non-default-def ssa names when a parm decl is going away. */ | |
718 | tree new_ssa_base; | |
719 | ||
720 | /* If non-NULL and the original parameter is to be removed (copy_param below | |
721 | is NULL), this is going to be its nonlocalized vars value. */ | |
722 | tree nonlocal_value; | |
723 | ||
6bcfabf2 | 724 | /* This holds the prefix to be used for the new DECL_NAME. */ |
725 | const char *arg_prefix; | |
726 | ||
547f1802 | 727 | /* Offset into the original parameter (for the cases when the new parameter |
728 | is a component of an original one). */ | |
729 | HOST_WIDE_INT offset; | |
730 | ||
6bcfabf2 | 731 | /* Zero based index of the original parameter this one is based on. */ |
547f1802 | 732 | int base_index; |
733 | ||
6bcfabf2 | 734 | /* Whether this parameter is a new parameter, a copy of an old one, |
735 | or one about to be removed. */ | |
736 | enum ipa_parm_op op; | |
547f1802 | 737 | |
738 | /* The parameter is to be passed by reference. */ | |
739 | unsigned by_ref : 1; | |
740 | }; | |
741 | ||
b3e7c666 | 742 | typedef vec<ipa_parm_adjustment> ipa_parm_adjustment_vec; |
547f1802 | 743 | |
f1f41a6c | 744 | vec<tree> ipa_get_vector_of_formal_parms (tree fndecl); |
6bcfabf2 | 745 | vec<tree> ipa_get_vector_of_formal_parm_types (tree fntype); |
746 | void ipa_modify_formal_parameters (tree fndecl, ipa_parm_adjustment_vec); | |
1a91d914 | 747 | void ipa_modify_call_arguments (struct cgraph_edge *, gcall *, |
547f1802 | 748 | ipa_parm_adjustment_vec); |
749 | ipa_parm_adjustment_vec ipa_combine_adjustments (ipa_parm_adjustment_vec, | |
750 | ipa_parm_adjustment_vec); | |
751 | void ipa_dump_param_adjustments (FILE *, ipa_parm_adjustment_vec, tree); | |
803a7988 | 752 | void ipa_dump_agg_replacement_values (FILE *f, |
753 | struct ipa_agg_replacement_value *av); | |
eab36a5a | 754 | void ipa_prop_write_jump_functions (void); |
8867b500 | 755 | void ipa_prop_read_jump_functions (void); |
ae7b7bc8 | 756 | void ipcp_write_transformation_summaries (void); |
757 | void ipcp_read_transformation_summaries (void); | |
8867b500 | 758 | void ipa_update_after_lto_read (void); |
a41f2a28 | 759 | int ipa_get_param_decl_index (struct ipa_node_params *, tree); |
20da2013 | 760 | tree ipa_value_from_jfunc (struct ipa_node_params *info, |
761 | struct ipa_jump_func *jfunc); | |
803a7988 | 762 | unsigned int ipcp_transform_function (struct cgraph_node *node); |
245ab191 | 763 | ipa_polymorphic_call_context ipa_context_from_jfunc (ipa_node_params *, |
764 | cgraph_edge *, | |
765 | int, | |
766 | ipa_jump_func *); | |
09ab6335 | 767 | void ipa_dump_param (FILE *, struct ipa_node_params *info, int i); |
6bcfabf2 | 768 | bool ipa_modify_expr (tree *, bool, ipa_parm_adjustment_vec); |
769 | ipa_parm_adjustment *ipa_get_adjustment_candidate (tree **, bool *, | |
770 | ipa_parm_adjustment_vec, | |
771 | bool); | |
93f713da | 772 | |
8867b500 | 773 | |
547f1802 | 774 | /* From tree-sra.c: */ |
a60aac35 | 775 | tree build_ref_for_offset (location_t, tree, HOST_WIDE_INT, tree, |
776 | gimple_stmt_iterator *, bool); | |
547f1802 | 777 | |
415309e2 | 778 | /* In ipa-cp.c */ |
779 | void ipa_cp_c_finalize (void); | |
780 | ||
3b22db66 | 781 | #endif /* IPA_PROP_H */ |