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3b22db66 | 1 | /* Interprocedural analyses. |
fbd26352 | 2 | Copyright (C) 2005-2019 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 | |
a54071b2 | 146 | /* Information about zero/non-zero bits. */ |
147 | struct GTY(()) ipa_bits | |
148 | { | |
149 | /* The propagated value. */ | |
150 | widest_int value; | |
151 | /* Mask corresponding to the value. | |
152 | Similar to ccp_lattice_t, if xth bit of mask is 0, | |
153 | implies xth bit of value is constant. */ | |
154 | widest_int mask; | |
a54071b2 | 155 | }; |
156 | ||
25a8e007 | 157 | /* Info about value ranges. */ |
97cb825b | 158 | |
25a8e007 | 159 | struct GTY(()) ipa_vr |
160 | { | |
161 | /* The data fields below are valid only if known is true. */ | |
162 | bool known; | |
be44111e | 163 | enum value_range_kind type; |
25a8e007 | 164 | wide_int min; |
165 | wide_int max; | |
166 | }; | |
167 | ||
1917e945 | 168 | /* A jump function for a callsite represents the values passed as actual |
169 | arguments of the callsite. See enum jump_func_type for the various | |
3b22db66 | 170 | types of jump functions supported. */ |
b3e7c666 | 171 | struct GTY (()) ipa_jump_func |
3b22db66 | 172 | { |
0d491188 | 173 | /* Aggregate contants description. See struct ipa_agg_jump_function and its |
174 | description. */ | |
175 | struct ipa_agg_jump_function agg; | |
176 | ||
97cb825b | 177 | /* Information about zero/non-zero bits. The pointed to structure is shared |
178 | betweed different jump functions. Use ipa_set_jfunc_bits to set this | |
179 | field. */ | |
180 | struct ipa_bits *bits; | |
a54071b2 | 181 | |
72b16d90 | 182 | /* Information about value range, containing valid data only when vr_known is |
97cb825b | 183 | true. The pointed to structure is shared betweed different jump |
184 | functions. Use ipa_set_jfunc_vr to set this field. */ | |
a1054504 | 185 | struct value_range_base *m_vr; |
25a8e007 | 186 | |
3b22db66 | 187 | enum jump_func_type type; |
8867b500 | 188 | /* Represents a value of a jump function. pass_through is used only in jump |
189 | function context. constant represents the actual constant in constant jump | |
190 | functions and member_cst holds constant c++ member functions. */ | |
191 | union jump_func_value | |
192 | { | |
096295f6 | 193 | struct ipa_constant_data GTY ((tag ("IPA_JF_CONST"))) constant; |
8867b500 | 194 | struct ipa_pass_through_data GTY ((tag ("IPA_JF_PASS_THROUGH"))) pass_through; |
195 | struct ipa_ancestor_jf_data GTY ((tag ("IPA_JF_ANCESTOR"))) ancestor; | |
8867b500 | 196 | } GTY ((desc ("%1.type"))) value; |
b3e7c666 | 197 | }; |
b22832dc | 198 | |
3b22db66 | 199 | |
4fa83f96 | 200 | /* Return the constant stored in a constant jump functin JFUNC. */ |
201 | ||
202 | static inline tree | |
203 | ipa_get_jf_constant (struct ipa_jump_func *jfunc) | |
204 | { | |
205 | gcc_checking_assert (jfunc->type == IPA_JF_CONST); | |
096295f6 | 206 | return jfunc->value.constant.value; |
207 | } | |
208 | ||
209 | static inline struct ipa_cst_ref_desc * | |
210 | ipa_get_jf_constant_rdesc (struct ipa_jump_func *jfunc) | |
211 | { | |
212 | gcc_checking_assert (jfunc->type == IPA_JF_CONST); | |
213 | return jfunc->value.constant.rdesc; | |
4fa83f96 | 214 | } |
215 | ||
216 | /* Return the operand of a pass through jmp function JFUNC. */ | |
217 | ||
218 | static inline tree | |
219 | ipa_get_jf_pass_through_operand (struct ipa_jump_func *jfunc) | |
220 | { | |
221 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
222 | return jfunc->value.pass_through.operand; | |
223 | } | |
224 | ||
225 | /* Return the number of the caller's formal parameter that a pass through jump | |
226 | function JFUNC refers to. */ | |
227 | ||
228 | static inline int | |
229 | ipa_get_jf_pass_through_formal_id (struct ipa_jump_func *jfunc) | |
230 | { | |
231 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
232 | return jfunc->value.pass_through.formal_id; | |
233 | } | |
234 | ||
235 | /* Return operation of a pass through jump function JFUNC. */ | |
236 | ||
237 | static inline enum tree_code | |
238 | ipa_get_jf_pass_through_operation (struct ipa_jump_func *jfunc) | |
239 | { | |
240 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
241 | return jfunc->value.pass_through.operation; | |
242 | } | |
243 | ||
ad4a8b28 | 244 | /* Return the agg_preserved flag of a pass through jump function JFUNC. */ |
0d491188 | 245 | |
246 | static inline bool | |
247 | ipa_get_jf_pass_through_agg_preserved (struct ipa_jump_func *jfunc) | |
248 | { | |
249 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
250 | return jfunc->value.pass_through.agg_preserved; | |
251 | } | |
252 | ||
245ab191 | 253 | /* Return true if pass through jump function JFUNC preserves type |
254 | information. */ | |
ad4a8b28 | 255 | |
256 | static inline bool | |
257 | ipa_get_jf_pass_through_type_preserved (struct ipa_jump_func *jfunc) | |
258 | { | |
259 | gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
245ab191 | 260 | return jfunc->value.pass_through.agg_preserved; |
ad4a8b28 | 261 | } |
262 | ||
4fa83f96 | 263 | /* Return the offset of an ancestor jump function JFUNC. */ |
264 | ||
265 | static inline HOST_WIDE_INT | |
266 | ipa_get_jf_ancestor_offset (struct ipa_jump_func *jfunc) | |
267 | { | |
268 | gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
269 | return jfunc->value.ancestor.offset; | |
270 | } | |
271 | ||
4fa83f96 | 272 | /* Return the number of the caller's formal parameter that an ancestor jump |
273 | function JFUNC refers to. */ | |
274 | ||
275 | static inline int | |
276 | ipa_get_jf_ancestor_formal_id (struct ipa_jump_func *jfunc) | |
277 | { | |
278 | gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
279 | return jfunc->value.ancestor.formal_id; | |
280 | } | |
281 | ||
ad4a8b28 | 282 | /* Return the agg_preserved flag of an ancestor jump function JFUNC. */ |
4fa83f96 | 283 | |
0d491188 | 284 | static inline bool |
285 | ipa_get_jf_ancestor_agg_preserved (struct ipa_jump_func *jfunc) | |
4fa83f96 | 286 | { |
0d491188 | 287 | gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); |
288 | return jfunc->value.ancestor.agg_preserved; | |
4fa83f96 | 289 | } |
290 | ||
245ab191 | 291 | /* Return true if ancestor jump function JFUNC presrves type information. */ |
ad4a8b28 | 292 | |
293 | static inline bool | |
294 | ipa_get_jf_ancestor_type_preserved (struct ipa_jump_func *jfunc) | |
295 | { | |
296 | gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
245ab191 | 297 | return jfunc->value.ancestor.agg_preserved; |
ad4a8b28 | 298 | } |
299 | ||
821d0e0f | 300 | /* Summary describing a single formal parameter. */ |
6378ffb3 | 301 | |
7af25a10 | 302 | struct GTY(()) ipa_param_descriptor |
3f2ff969 | 303 | { |
a54071b2 | 304 | /* In analysis and modification phase, this is the PARAM_DECL of this |
305 | parameter, in IPA LTO phase, this is the type of the the described | |
306 | parameter or NULL if not known. Do not read this field directly but | |
307 | through ipa_get_param and ipa_get_type as appropriate. */ | |
308 | tree decl_or_type; | |
096295f6 | 309 | /* If all uses of the parameter are described by ipa-prop structures, this |
310 | says how many there are. If any use could not be described by means of | |
311 | ipa-prop structures, this is IPA_UNDESCRIBED_USE. */ | |
312 | int controlled_uses; | |
09ab6335 | 313 | unsigned int move_cost : 31; |
bc1b408a | 314 | /* The parameter is used. */ |
315 | unsigned used : 1; | |
3f2ff969 | 316 | }; |
317 | ||
3889f2e2 | 318 | /* ipa_node_params stores information related to formal parameters of functions |
319 | and some other information for interprocedural passes that operate on | |
320 | parameters (such as ipa-cp). */ | |
821d0e0f | 321 | |
7af25a10 | 322 | struct GTY((for_user)) ipa_node_params |
3b22db66 | 323 | { |
3ca1e19c | 324 | /* Default constructor. */ |
325 | ipa_node_params (); | |
326 | ||
327 | /* Default destructor. */ | |
328 | ~ipa_node_params (); | |
329 | ||
821d0e0f | 330 | /* Information about individual formal parameters that are gathered when |
331 | summaries are generated. */ | |
7af25a10 | 332 | vec<ipa_param_descriptor, va_gc> *descriptors; |
821d0e0f | 333 | /* Pointer to an array of structures describing individual formal |
334 | parameters. */ | |
7af25a10 | 335 | struct ipcp_param_lattices * GTY((skip)) lattices; |
821d0e0f | 336 | /* Only for versioned nodes this field would not be NULL, |
337 | it points to the node that IPA cp cloned from. */ | |
7af25a10 | 338 | struct cgraph_node * GTY((skip)) ipcp_orig_node; |
245ab191 | 339 | /* If this node is an ipa-cp clone, these are the known constants that |
340 | describe what it has been specialized for. */ | |
7af25a10 | 341 | vec<tree> GTY((skip)) known_csts; |
245ab191 | 342 | /* If this node is an ipa-cp clone, these are the known polymorphic contexts |
343 | that describe what it has been specialized for. */ | |
7af25a10 | 344 | vec<ipa_polymorphic_call_context> GTY((skip)) known_contexts; |
24430d08 | 345 | /* Whether the param uses analysis and jump function computation has already |
346 | been performed. */ | |
347 | unsigned analysis_done : 1; | |
821d0e0f | 348 | /* Whether the function is enqueued in ipa-cp propagation stack. */ |
609c710b | 349 | unsigned node_enqueued : 1; |
821d0e0f | 350 | /* Whether we should create a specialized version based on values that are |
351 | known to be constant in all contexts. */ | |
87228246 | 352 | unsigned do_clone_for_all_contexts : 1; |
353 | /* Set if this is an IPA-CP clone for all contexts. */ | |
354 | unsigned is_all_contexts_clone : 1; | |
821d0e0f | 355 | /* Node has been completely replaced by clones and will be removed after |
356 | ipa-cp is finished. */ | |
357 | unsigned node_dead : 1; | |
39fcd838 | 358 | /* Node is involved in a recursion, potentionally indirect. */ |
359 | unsigned node_within_scc : 1; | |
360 | /* Node is calling a private function called only once. */ | |
361 | unsigned node_calling_single_call : 1; | |
b8681788 | 362 | /* False when there is something makes versioning impossible. */ |
363 | unsigned versionable : 1; | |
3b22db66 | 364 | }; |
365 | ||
3ca1e19c | 366 | inline |
367 | ipa_node_params::ipa_node_params () | |
368 | : descriptors (NULL), lattices (NULL), ipcp_orig_node (NULL), | |
369 | known_csts (vNULL), known_contexts (vNULL), analysis_done (0), | |
370 | node_enqueued (0), do_clone_for_all_contexts (0), is_all_contexts_clone (0), | |
371 | node_dead (0), node_within_scc (0), node_calling_single_call (0), | |
372 | versionable (0) | |
373 | { | |
374 | } | |
375 | ||
376 | inline | |
377 | ipa_node_params::~ipa_node_params () | |
378 | { | |
379 | free (lattices); | |
380 | known_csts.release (); | |
381 | known_contexts.release (); | |
382 | } | |
383 | ||
1a673ff0 | 384 | /* Intermediate information that we get from alias analysis about a particular |
385 | parameter in a particular basic_block. When a parameter or the memory it | |
9ea91b78 | 386 | references is marked modified, we use that information in all dominated |
387 | blocks without consulting alias analysis oracle. */ | |
1a673ff0 | 388 | |
9ea91b78 | 389 | struct ipa_param_aa_status |
1a673ff0 | 390 | { |
391 | /* Set when this structure contains meaningful information. If not, the | |
392 | structure describing a dominating BB should be used instead. */ | |
393 | bool valid; | |
394 | ||
395 | /* Whether we have seen something which might have modified the data in | |
396 | question. PARM is for the parameter itself, REF is for data it points to | |
397 | but using the alias type of individual accesses and PT is the same thing | |
398 | but for computing aggregate pass-through functions using a very inclusive | |
399 | ao_ref. */ | |
400 | bool parm_modified, ref_modified, pt_modified; | |
401 | }; | |
402 | ||
403 | /* Information related to a given BB that used only when looking at function | |
404 | body. */ | |
405 | ||
406 | struct ipa_bb_info | |
407 | { | |
408 | /* Call graph edges going out of this BB. */ | |
409 | vec<cgraph_edge *> cg_edges; | |
410 | /* Alias analysis statuses of each formal parameter at this bb. */ | |
9ea91b78 | 411 | vec<ipa_param_aa_status> param_aa_statuses; |
1a673ff0 | 412 | }; |
413 | ||
414 | /* Structure with global information that is only used when looking at function | |
415 | body. */ | |
416 | ||
9ea91b78 | 417 | struct ipa_func_body_info |
1a673ff0 | 418 | { |
419 | /* The node that is being analyzed. */ | |
420 | cgraph_node *node; | |
421 | ||
422 | /* Its info. */ | |
423 | struct ipa_node_params *info; | |
424 | ||
425 | /* Information about individual BBs. */ | |
426 | vec<ipa_bb_info> bb_infos; | |
427 | ||
428 | /* Number of parameters. */ | |
429 | int param_count; | |
430 | ||
915df3d8 | 431 | /* Number of statements we are still allowed to walked by when analyzing this |
432 | function. */ | |
433 | unsigned int aa_walk_budget; | |
1a673ff0 | 434 | }; |
435 | ||
3889f2e2 | 436 | /* ipa_node_params access functions. Please use these to access fields that |
437 | are or will be shared among various passes. */ | |
438 | ||
3889f2e2 | 439 | /* Return the number of formal parameters. */ |
1917e945 | 440 | |
3889f2e2 | 441 | static inline int |
442 | ipa_get_param_count (struct ipa_node_params *info) | |
443 | { | |
7af25a10 | 444 | return vec_safe_length (info->descriptors); |
3889f2e2 | 445 | } |
446 | ||
3f2ff969 | 447 | /* Return the declaration of Ith formal parameter of the function corresponding |
448 | to INFO. Note there is no setter function as this array is built just once | |
a54071b2 | 449 | using ipa_initialize_node_params. This function should not be called in |
450 | WPA. */ | |
1917e945 | 451 | |
3889f2e2 | 452 | static inline tree |
3f2ff969 | 453 | ipa_get_param (struct ipa_node_params *info, int i) |
3889f2e2 | 454 | { |
7af25a10 | 455 | gcc_checking_assert (info->descriptors); |
09ab6335 | 456 | gcc_checking_assert (!flag_wpa); |
7af25a10 | 457 | tree t = (*info->descriptors)[i].decl_or_type; |
a54071b2 | 458 | gcc_checking_assert (TREE_CODE (t) == PARM_DECL); |
459 | return t; | |
460 | } | |
461 | ||
462 | /* Return the type of Ith formal parameter of the function corresponding | |
463 | to INFO if it is known or NULL if not. */ | |
464 | ||
465 | static inline tree | |
466 | ipa_get_type (struct ipa_node_params *info, int i) | |
467 | { | |
944ee40d | 468 | if (vec_safe_length (info->descriptors) <= (unsigned) i) |
469 | return NULL; | |
7af25a10 | 470 | tree t = (*info->descriptors)[i].decl_or_type; |
a54071b2 | 471 | if (!t) |
472 | return NULL; | |
473 | if (TYPE_P (t)) | |
474 | return t; | |
475 | gcc_checking_assert (TREE_CODE (t) == PARM_DECL); | |
476 | return TREE_TYPE (t); | |
bc1b408a | 477 | } |
478 | ||
09ab6335 | 479 | /* Return the move cost of Ith formal parameter of the function corresponding |
480 | to INFO. */ | |
481 | ||
482 | static inline int | |
483 | ipa_get_param_move_cost (struct ipa_node_params *info, int i) | |
484 | { | |
7af25a10 | 485 | gcc_checking_assert (info->descriptors); |
486 | return (*info->descriptors)[i].move_cost; | |
09ab6335 | 487 | } |
488 | ||
821d0e0f | 489 | /* Set the used flag corresponding to the Ith formal parameter of the function |
490 | associated with INFO to VAL. */ | |
1caef38b | 491 | |
821d0e0f | 492 | static inline void |
493 | ipa_set_param_used (struct ipa_node_params *info, int i, bool val) | |
1caef38b | 494 | { |
7af25a10 | 495 | gcc_checking_assert (info->descriptors); |
496 | (*info->descriptors)[i].used = val; | |
1caef38b | 497 | } |
498 | ||
096295f6 | 499 | /* Return how many uses described by ipa-prop a parameter has or |
500 | IPA_UNDESCRIBED_USE if there is a use that is not described by these | |
501 | structures. */ | |
502 | static inline int | |
503 | ipa_get_controlled_uses (struct ipa_node_params *info, int i) | |
504 | { | |
7af25a10 | 505 | /* FIXME: introducing speculation causes out of bounds access here. */ |
506 | if (vec_safe_length (info->descriptors) > (unsigned)i) | |
507 | return (*info->descriptors)[i].controlled_uses; | |
072ec6eb | 508 | return IPA_UNDESCRIBED_USE; |
096295f6 | 509 | } |
510 | ||
511 | /* Set the controlled counter of a given parameter. */ | |
512 | ||
513 | static inline void | |
514 | ipa_set_controlled_uses (struct ipa_node_params *info, int i, int val) | |
515 | { | |
7af25a10 | 516 | gcc_checking_assert (info->descriptors); |
517 | (*info->descriptors)[i].controlled_uses = val; | |
096295f6 | 518 | } |
519 | ||
821d0e0f | 520 | /* Return the used flag corresponding to the Ith formal parameter of the |
521 | function associated with INFO. */ | |
1caef38b | 522 | |
523 | static inline bool | |
821d0e0f | 524 | ipa_is_param_used (struct ipa_node_params *info, int i) |
1caef38b | 525 | { |
7af25a10 | 526 | gcc_checking_assert (info->descriptors); |
527 | return (*info->descriptors)[i].used; | |
1caef38b | 528 | } |
529 | ||
803a7988 | 530 | /* Information about replacements done in aggregates for a given node (each |
531 | node has its linked list). */ | |
532 | struct GTY(()) ipa_agg_replacement_value | |
533 | { | |
534 | /* Next item in the linked list. */ | |
535 | struct ipa_agg_replacement_value *next; | |
536 | /* Offset within the aggregate. */ | |
537 | HOST_WIDE_INT offset; | |
538 | /* The constant value. */ | |
539 | tree value; | |
540 | /* The paramter index. */ | |
541 | int index; | |
c42e4f2e | 542 | /* Whether the value was passed by reference. */ |
543 | bool by_ref; | |
803a7988 | 544 | }; |
545 | ||
ae7b7bc8 | 546 | /* Structure holding information for the transformation phase of IPA-CP. */ |
547 | ||
00637f9c | 548 | struct GTY(()) ipcp_transformation |
ae7b7bc8 | 549 | { |
550 | /* Linked list of known aggregate values. */ | |
551 | ipa_agg_replacement_value *agg_values; | |
a54071b2 | 552 | /* Known bits information. */ |
97cb825b | 553 | vec<ipa_bits *, va_gc> *bits; |
25a8e007 | 554 | /* Value range information. */ |
555 | vec<ipa_vr, va_gc> *m_vr; | |
ae7b7bc8 | 556 | }; |
803a7988 | 557 | |
558 | void ipa_set_node_agg_value_chain (struct cgraph_node *node, | |
559 | struct ipa_agg_replacement_value *aggvals); | |
00637f9c | 560 | void ipcp_transformation_initialize (void); |
803a7988 | 561 | |
10d560f3 | 562 | /* ipa_edge_args stores information related to a callsite and particularly its |
563 | arguments. It can be accessed by the IPA_EDGE_REF macro. */ | |
322dd010 | 564 | |
565 | class GTY((for_user)) ipa_edge_args | |
3b22db66 | 566 | { |
322dd010 | 567 | public: |
568 | ||
569 | /* Default constructor. */ | |
570 | ipa_edge_args () : jump_functions (NULL), polymorphic_call_contexts (NULL) | |
571 | {} | |
572 | ||
573 | /* Destructor. */ | |
574 | ~ipa_edge_args () | |
575 | { | |
576 | vec_free (jump_functions); | |
577 | vec_free (polymorphic_call_contexts); | |
578 | } | |
579 | ||
580 | /* Vectors of the callsite's jump function and polymorphic context | |
581 | information of each parameter. */ | |
b3e7c666 | 582 | vec<ipa_jump_func, va_gc> *jump_functions; |
072ec6eb | 583 | vec<ipa_polymorphic_call_context, va_gc> *polymorphic_call_contexts; |
b3e7c666 | 584 | }; |
3b22db66 | 585 | |
3889f2e2 | 586 | /* ipa_edge_args access functions. Please use these to access fields that |
587 | are or will be shared among various passes. */ | |
588 | ||
3889f2e2 | 589 | /* Return the number of actual arguments. */ |
1917e945 | 590 | |
3889f2e2 | 591 | static inline int |
592 | ipa_get_cs_argument_count (struct ipa_edge_args *args) | |
593 | { | |
f1f41a6c | 594 | return vec_safe_length (args->jump_functions); |
3889f2e2 | 595 | } |
596 | ||
597 | /* Returns a pointer to the jump function for the ith argument. Please note | |
598 | there is no setter function as jump functions are all set up in | |
599 | ipa_compute_jump_functions. */ | |
1917e945 | 600 | |
3889f2e2 | 601 | static inline struct ipa_jump_func * |
602 | ipa_get_ith_jump_func (struct ipa_edge_args *args, int i) | |
603 | { | |
f1f41a6c | 604 | return &(*args->jump_functions)[i]; |
3889f2e2 | 605 | } |
606 | ||
072ec6eb | 607 | /* Returns a pointer to the polymorphic call context for the ith argument. |
608 | NULL if contexts are not computed. */ | |
609 | static inline struct ipa_polymorphic_call_context * | |
610 | ipa_get_ith_polymorhic_call_context (struct ipa_edge_args *args, int i) | |
611 | { | |
612 | if (!args->polymorphic_call_contexts) | |
613 | return NULL; | |
614 | return &(*args->polymorphic_call_contexts)[i]; | |
615 | } | |
616 | ||
b4bae7a0 | 617 | /* Function summary for ipa_node_params. */ |
7af25a10 | 618 | class GTY((user)) ipa_node_params_t: public function_summary <ipa_node_params *> |
2cc80ac3 | 619 | { |
620 | public: | |
7af25a10 | 621 | ipa_node_params_t (symbol_table *table, bool ggc): |
622 | function_summary<ipa_node_params *> (table, ggc) { } | |
545eff8f | 623 | |
2cc80ac3 | 624 | /* Hook that is called by summary when a node is duplicated. */ |
625 | virtual void duplicate (cgraph_node *node, | |
626 | cgraph_node *node2, | |
627 | ipa_node_params *data, | |
628 | ipa_node_params *data2); | |
629 | }; | |
630 | ||
322dd010 | 631 | /* Summary to manange ipa_edge_args structures. */ |
632 | ||
633 | class GTY((user)) ipa_edge_args_sum_t : public call_summary <ipa_edge_args *> | |
634 | { | |
635 | public: | |
636 | ipa_edge_args_sum_t (symbol_table *table, bool ggc) | |
637 | : call_summary<ipa_edge_args *> (table, ggc) { } | |
638 | ||
639 | /* Hook that is called by summary when an edge is duplicated. */ | |
640 | virtual void remove (cgraph_edge *cs, ipa_edge_args *args); | |
641 | /* Hook that is called by summary when an edge is duplicated. */ | |
642 | virtual void duplicate (cgraph_edge *src, | |
643 | cgraph_edge *dst, | |
644 | ipa_edge_args *old_args, | |
645 | ipa_edge_args *new_args); | |
646 | }; | |
647 | ||
2cc80ac3 | 648 | /* Function summary where the parameter infos are actually stored. */ |
7af25a10 | 649 | extern GTY(()) ipa_node_params_t * ipa_node_params_sum; |
322dd010 | 650 | /* Call summary to store information about edges such as jump functions. */ |
651 | extern GTY(()) ipa_edge_args_sum_t *ipa_edge_args_sum; | |
7af25a10 | 652 | |
00637f9c | 653 | /* Function summary for IPA-CP transformation. */ |
654 | class ipcp_transformation_t | |
655 | : public function_summary<ipcp_transformation *> | |
656 | { | |
657 | public: | |
658 | ipcp_transformation_t (symbol_table *table, bool ggc): | |
659 | function_summary<ipcp_transformation *> (table, ggc) {} | |
660 | ||
661 | ~ipcp_transformation_t () {} | |
662 | ||
663 | static ipcp_transformation_t *create_ggc (symbol_table *symtab) | |
664 | { | |
665 | ipcp_transformation_t *summary | |
666 | = new (ggc_cleared_alloc <ipcp_transformation_t> ()) | |
667 | ipcp_transformation_t (symtab, true); | |
668 | return summary; | |
669 | } | |
670 | }; | |
671 | ||
672 | /* Function summary where the IPA CP transformations are actually stored. */ | |
673 | extern GTY(()) function_summary <ipcp_transformation *> *ipcp_transformation_sum; | |
7af25a10 | 674 | |
545eff8f | 675 | /* Return the associated parameter/argument info corresponding to the given |
676 | node/edge. */ | |
b53d4f56 | 677 | #define IPA_NODE_REF(NODE) (ipa_node_params_sum->get_create (NODE)) |
678 | #define IPA_EDGE_REF(EDGE) (ipa_edge_args_sum->get_create (EDGE)) | |
545eff8f | 679 | /* This macro checks validity of index returned by |
680 | ipa_get_param_decl_index function. */ | |
681 | #define IS_VALID_JUMP_FUNC_INDEX(I) ((I) != -1) | |
682 | ||
683 | /* Creating and freeing ipa_node_params and ipa_edge_args. */ | |
684 | void ipa_create_all_node_params (void); | |
685 | void ipa_create_all_edge_args (void); | |
97cb825b | 686 | void ipa_check_create_edge_args (void); |
545eff8f | 687 | void ipa_free_all_node_params (void); |
688 | void ipa_free_all_edge_args (void); | |
799c8711 | 689 | void ipa_free_all_structures_after_ipa_cp (void); |
690 | void ipa_free_all_structures_after_iinln (void); | |
2cc80ac3 | 691 | |
545eff8f | 692 | void ipa_register_cgraph_hooks (void); |
09809ecc | 693 | int count_formal_params (tree fndecl); |
545eff8f | 694 | |
695 | /* This function ensures the array of node param infos is big enough to | |
1917e945 | 696 | accommodate a structure for all nodes and reallocates it if not. */ |
697 | ||
545eff8f | 698 | static inline void |
699 | ipa_check_create_node_params (void) | |
700 | { | |
2cc80ac3 | 701 | if (!ipa_node_params_sum) |
7af25a10 | 702 | ipa_node_params_sum |
703 | = (new (ggc_cleared_alloc <ipa_node_params_t> ()) | |
704 | ipa_node_params_t (symtab, true)); | |
545eff8f | 705 | } |
706 | ||
322dd010 | 707 | /* Returns true if edge summary contains a record for EDGE. The main purpose |
708 | of this function is that debug dumping function can check info availability | |
709 | without causing allocations. */ | |
1917e945 | 710 | |
86c96e3a | 711 | static inline bool |
712 | ipa_edge_args_info_available_for_edge_p (struct cgraph_edge *edge) | |
713 | { | |
322dd010 | 714 | return ipa_edge_args_sum->exists (edge); |
86c96e3a | 715 | } |
716 | ||
00637f9c | 717 | static inline ipcp_transformation * |
ae7b7bc8 | 718 | ipcp_get_transformation_summary (cgraph_node *node) |
719 | { | |
00637f9c | 720 | if (ipcp_transformation_sum == NULL) |
ae7b7bc8 | 721 | return NULL; |
00637f9c | 722 | |
723 | return ipcp_transformation_sum->get (node); | |
ae7b7bc8 | 724 | } |
725 | ||
803a7988 | 726 | /* Return the aggregate replacements for NODE, if there are any. */ |
727 | ||
728 | static inline struct ipa_agg_replacement_value * | |
ae7b7bc8 | 729 | ipa_get_agg_replacements_for_node (cgraph_node *node) |
803a7988 | 730 | { |
00637f9c | 731 | ipcp_transformation *ts = ipcp_get_transformation_summary (node); |
ae7b7bc8 | 732 | return ts ? ts->agg_values : NULL; |
803a7988 | 733 | } |
734 | ||
3f2ff969 | 735 | /* Function formal parameters related computations. */ |
736 | void ipa_initialize_node_params (struct cgraph_node *node); | |
3f2ff969 | 737 | bool ipa_propagate_indirect_call_infos (struct cgraph_edge *cs, |
415d1b9a | 738 | vec<cgraph_edge *> *new_edges); |
3b22db66 | 739 | |
1caef38b | 740 | /* Indirect edge and binfo processing. */ |
20da2013 | 741 | tree ipa_get_indirect_edge_target (struct cgraph_edge *ie, |
f1f41a6c | 742 | vec<tree> , |
245ab191 | 743 | vec<ipa_polymorphic_call_context>, |
f21a87d8 | 744 | vec<ipa_agg_jump_function_p>, |
745 | bool *); | |
072ec6eb | 746 | struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree, |
747 | bool speculative = false); | |
3bc62a51 | 748 | tree ipa_impossible_devirt_target (struct cgraph_edge *, tree); |
97cb825b | 749 | ipa_bits *ipa_get_ipa_bits_for_value (const widest_int &value, |
750 | const widest_int &mask); | |
751 | ||
1caef38b | 752 | |
821d0e0f | 753 | /* Functions related to both. */ |
754 | void ipa_analyze_node (struct cgraph_node *); | |
1caef38b | 755 | |
0d491188 | 756 | /* Aggregate jump function related functions. */ |
665ff45b | 757 | tree ipa_find_agg_cst_for_param (struct ipa_agg_jump_function *agg, tree scalar, |
758 | HOST_WIDE_INT offset, bool by_ref, | |
759 | bool *from_global_constant = NULL); | |
760 | bool ipa_load_from_parm_agg (struct ipa_func_body_info *fbi, | |
7af25a10 | 761 | vec<ipa_param_descriptor, va_gc> *descriptors, |
665ff45b | 762 | gimple *stmt, tree op, int *index_p, |
763 | HOST_WIDE_INT *offset_p, HOST_WIDE_INT *size_p, | |
764 | bool *by_ref, bool *guaranteed_unmodified = NULL); | |
0d491188 | 765 | |
3b22db66 | 766 | /* Debugging interface. */ |
11b73810 | 767 | void ipa_print_node_params (FILE *, struct cgraph_node *node); |
768 | void ipa_print_all_params (FILE *); | |
f8daee9b | 769 | void ipa_print_node_jump_functions (FILE *f, struct cgraph_node *node); |
770 | void ipa_print_all_jump_functions (FILE * f); | |
821d0e0f | 771 | void ipcp_verify_propagated_values (void); |
772 | ||
8361d32f | 773 | template <typename value> |
774 | class ipcp_value; | |
775 | ||
e16712b1 | 776 | extern object_allocator<ipcp_value<tree> > ipcp_cst_values_pool; |
777 | extern object_allocator<ipcp_value<ipa_polymorphic_call_context> > | |
8361d32f | 778 | ipcp_poly_ctx_values_pool; |
779 | ||
780 | template <typename valtype> | |
781 | class ipcp_value_source; | |
782 | ||
e16712b1 | 783 | extern object_allocator<ipcp_value_source<tree> > ipcp_sources_pool; |
8361d32f | 784 | |
785 | class ipcp_agg_lattice; | |
786 | ||
e16712b1 | 787 | extern object_allocator<ipcp_agg_lattice> ipcp_agg_lattice_pool; |
3b22db66 | 788 | |
803a7988 | 789 | void ipa_dump_agg_replacement_values (FILE *f, |
790 | struct ipa_agg_replacement_value *av); | |
eab36a5a | 791 | void ipa_prop_write_jump_functions (void); |
8867b500 | 792 | void ipa_prop_read_jump_functions (void); |
ae7b7bc8 | 793 | void ipcp_write_transformation_summaries (void); |
794 | void ipcp_read_transformation_summaries (void); | |
a41f2a28 | 795 | int ipa_get_param_decl_index (struct ipa_node_params *, tree); |
20da2013 | 796 | tree ipa_value_from_jfunc (struct ipa_node_params *info, |
944ee40d | 797 | struct ipa_jump_func *jfunc, tree type); |
803a7988 | 798 | unsigned int ipcp_transform_function (struct cgraph_node *node); |
245ab191 | 799 | ipa_polymorphic_call_context ipa_context_from_jfunc (ipa_node_params *, |
800 | cgraph_edge *, | |
801 | int, | |
802 | ipa_jump_func *); | |
09ab6335 | 803 | void ipa_dump_param (FILE *, struct ipa_node_params *info, int i); |
73bd7d5f | 804 | void ipa_release_body_info (struct ipa_func_body_info *); |
166f8178 | 805 | tree ipa_get_callee_param_type (struct cgraph_edge *e, int i); |
8867b500 | 806 | |
547f1802 | 807 | /* From tree-sra.c: */ |
68a46b44 | 808 | tree build_ref_for_offset (location_t, tree, poly_int64, bool, tree, |
a60aac35 | 809 | gimple_stmt_iterator *, bool); |
547f1802 | 810 | |
415309e2 | 811 | /* In ipa-cp.c */ |
812 | void ipa_cp_c_finalize (void); | |
813 | ||
3b22db66 | 814 | #endif /* IPA_PROP_H */ |