1 /* Interprocedural analyses. 2 Copyright (C) 2005-2018 Free Software Foundation, Inc. 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 8 Software Foundation; either version 3, or (at your option) any later 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 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef IPA_PROP_H 21 #define IPA_PROP_H 22 23 /* The following definitions and interfaces are used by 24 interprocedural analyses or parameters. */ 25 26 #define IPA_UNDESCRIBED_USE -1 27 28 /* ipa-prop.c stuff (ipa-cp, indirect inlining): */ 29 30 /* A jump function for a callsite represents the values passed as actual 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 : 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 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 45 getting addresses of ancestor fields in C++ 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 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. */ 57 58 enum jump_func_type 59 { 60 IPA_JF_UNKNOWN = 0, /* newly allocated and zeroed jump functions default */ 61 IPA_JF_CONST, /* represented by field costant */ 62 IPA_JF_PASS_THROUGH, /* represented by field pass_through */ 63 IPA_JF_ANCESTOR /* represented by field ancestor */ 64 }; 65 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 77 /* Structure holding data required to describe a pass-through jump function. */ 78 79 struct GTY(()) ipa_pass_through_data 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; 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. */ 97 unsigned agg_preserved : 1; 98 }; 99 100 /* Structure holding data required to describe an ancestor pass-through 101 jump function. */ 102 103 struct GTY(()) ipa_ancestor_jf_data 104 { 105 /* Offset of the field representing the ancestor. */ 106 HOST_WIDE_INT offset; 107 /* Number of the caller's formal parameter being passed. */ 108 int formal_id; 109 /* Flag with the same meaning like agg_preserve in ipa_pass_through_data. */ 110 unsigned agg_preserved : 1; 111 }; 112 113 /* 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 121 fulfill is_gimple_ip_invariant. */ 122 123 struct GTY(()) ipa_agg_jf_item 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; 130 }; 131 132 133 /* 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 137 { 138 /* Description of the individual items. */ 139 vec<ipa_agg_jf_item, va_gc> *items; 140 /* True if the data was passed by reference (as opposed to by value). */ 141 bool by_ref; 142 }; 143 144 typedef struct ipa_agg_jump_function *ipa_agg_jump_function_p; 145 146 /* 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; 155 }; 156 157 /* Info about value ranges. */ 158 159 struct GTY(()) ipa_vr 160 { 161 /* The data fields below are valid only if known is true. */ 162 bool known; 163 enum value_range_type type; 164 wide_int min; 165 wide_int max; 166 }; 167 168 /* 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 170 types of jump functions supported. */ 171 struct GTY (()) ipa_jump_func 172 { 173 /* Aggregate contants description. See struct ipa_agg_jump_function and its 174 description. */ 175 struct ipa_agg_jump_function agg; 176 177 /* 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; 181 182 /* Information about value range, containing valid data only when vr_known is 183 true. The pointed to structure is shared betweed different jump 184 functions. Use ipa_set_jfunc_vr to set this field. */ 185 struct value_range *m_vr; 186 187 enum jump_func_type type; 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 { 193 struct ipa_constant_data GTY ((tag ("IPA_JF_CONST"))) constant; 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; 196 } GTY ((desc ("%1.type"))) value; 197 }; 198 199 200 /* 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); 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; 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 } 243 244 /* Return the agg_preserved flag of a pass through jump function JFUNC. */ 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 } 252 253 /* Return true if pass through jump function JFUNC preserves type 254 information. */ 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); 260 return jfunc->value.pass_through.agg_preserved; 261 } 262 263 /* 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 } 271 272 /* 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 } 281 282 /* Return the agg_preserved flag of an ancestor jump function JFUNC. */ 283 284 static inline bool 285 ipa_get_jf_ancestor_agg_preserved (struct ipa_jump_func *jfunc) 286 { 287 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); 288 return jfunc->value.ancestor.agg_preserved; 289 } 290 291 /* Return true if ancestor jump function JFUNC presrves type information. */ 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); 297 return jfunc->value.ancestor.agg_preserved; 298 } 299 300 /* Summary describing a single formal parameter. */ 301 302 struct GTY(()) ipa_param_descriptor 303 { 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; 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; 313 unsigned int move_cost : 31; 314 /* The parameter is used. */ 315 unsigned used : 1; 316 }; 317 318 /* 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). */ 321 322 struct GTY((for_user)) ipa_node_params 323 { 324 /* Default constructor. */ 325 ipa_node_params (); 326 327 /* Default destructor. */ 328 ~ipa_node_params (); 329 330 /* Information about individual formal parameters that are gathered when 331 summaries are generated. */ 332 vec<ipa_param_descriptor, va_gc> *descriptors; 333 /* Pointer to an array of structures describing individual formal 334 parameters. */ 335 struct ipcp_param_lattices * GTY((skip)) lattices; 336 /* Only for versioned nodes this field would not be NULL, 337 it points to the node that IPA cp cloned from. */ 338 struct cgraph_node * GTY((skip)) ipcp_orig_node; 339 /* If this node is an ipa-cp clone, these are the known constants that 340 describe what it has been specialized for. */ 341 vec<tree> GTY((skip)) known_csts; 342 /* If this node is an ipa-cp clone, these are the known polymorphic contexts 343 that describe what it has been specialized for. */ 344 vec<ipa_polymorphic_call_context> GTY((skip)) known_contexts; 345 /* Whether the param uses analysis and jump function computation has already 346 been performed. */ 347 unsigned analysis_done : 1; 348 /* Whether the function is enqueued in ipa-cp propagation stack. */ 349 unsigned node_enqueued : 1; 350 /* Whether we should create a specialized version based on values that are 351 known to be constant in all contexts. */ 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; 355 /* Node has been completely replaced by clones and will be removed after 356 ipa-cp is finished. */ 357 unsigned node_dead : 1; 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; 362 /* False when there is something makes versioning impossible. */ 363 unsigned versionable : 1; 364 }; 365 366 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 } 383 384 /* 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 386 references is marked modified, we use that information in all dominated 387 blocks without consulting alias analysis oracle. */ 388 389 struct ipa_param_aa_status 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. */ 411 vec<ipa_param_aa_status> param_aa_statuses; 412 }; 413 414 /* Structure with global information that is only used when looking at function 415 body. */ 416 417 struct ipa_func_body_info 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; 430 431 /* Number of statements already walked by when analyzing this function. */ 432 unsigned int aa_walked; 433 }; 434 435 /* ipa_node_params access functions. Please use these to access fields that 436 are or will be shared among various passes. */ 437 438 /* Return the number of formal parameters. */ 439 440 static inline int 441 ipa_get_param_count (struct ipa_node_params *info) 442 { 443 return vec_safe_length (info->descriptors); 444 } 445 446 /* Return the declaration of Ith formal parameter of the function corresponding 447 to INFO. Note there is no setter function as this array is built just once 448 using ipa_initialize_node_params. This function should not be called in 449 WPA. */ 450 451 static inline tree 452 ipa_get_param (struct ipa_node_params *info, int i) 453 { 454 gcc_checking_assert (info->descriptors); 455 gcc_checking_assert (!flag_wpa); 456 tree t = (*info->descriptors)[i].decl_or_type; 457 gcc_checking_assert (TREE_CODE (t) == PARM_DECL); 458 return t; 459 } 460 461 /* Return the type of Ith formal parameter of the function corresponding 462 to INFO if it is known or NULL if not. */ 463 464 static inline tree 465 ipa_get_type (struct ipa_node_params *info, int i) 466 { 467 if (vec_safe_length (info->descriptors) <= (unsigned) i) 468 return NULL; 469 tree t = (*info->descriptors)[i].decl_or_type; 470 if (!t) 471 return NULL; 472 if (TYPE_P (t)) 473 return t; 474 gcc_checking_assert (TREE_CODE (t) == PARM_DECL); 475 return TREE_TYPE (t); 476 } 477 478 /* Return the move cost of Ith formal parameter of the function corresponding 479 to INFO. */ 480 481 static inline int 482 ipa_get_param_move_cost (struct ipa_node_params *info, int i) 483 { 484 gcc_checking_assert (info->descriptors); 485 return (*info->descriptors)[i].move_cost; 486 } 487 488 /* Set the used flag corresponding to the Ith formal parameter of the function 489 associated with INFO to VAL. */ 490 491 static inline void 492 ipa_set_param_used (struct ipa_node_params *info, int i, bool val) 493 { 494 gcc_checking_assert (info->descriptors); 495 (*info->descriptors)[i].used = val; 496 } 497 498 /* Return how many uses described by ipa-prop a parameter has or 499 IPA_UNDESCRIBED_USE if there is a use that is not described by these 500 structures. */ 501 static inline int 502 ipa_get_controlled_uses (struct ipa_node_params *info, int i) 503 { 504 /* FIXME: introducing speculation causes out of bounds access here. */ 505 if (vec_safe_length (info->descriptors) > (unsigned)i) 506 return (*info->descriptors)[i].controlled_uses; 507 return IPA_UNDESCRIBED_USE; 508 } 509 510 /* Set the controlled counter of a given parameter. */ 511 512 static inline void 513 ipa_set_controlled_uses (struct ipa_node_params *info, int i, int val) 514 { 515 gcc_checking_assert (info->descriptors); 516 (*info->descriptors)[i].controlled_uses = val; 517 } 518 519 /* Return the used flag corresponding to the Ith formal parameter of the 520 function associated with INFO. */ 521 522 static inline bool 523 ipa_is_param_used (struct ipa_node_params *info, int i) 524 { 525 gcc_checking_assert (info->descriptors); 526 return (*info->descriptors)[i].used; 527 } 528 529 /* Information about replacements done in aggregates for a given node (each 530 node has its linked list). */ 531 struct GTY(()) ipa_agg_replacement_value 532 { 533 /* Next item in the linked list. */ 534 struct ipa_agg_replacement_value *next; 535 /* Offset within the aggregate. */ 536 HOST_WIDE_INT offset; 537 /* The constant value. */ 538 tree value; 539 /* The paramter index. */ 540 int index; 541 /* Whether the value was passed by reference. */ 542 bool by_ref; 543 }; 544 545 /* Structure holding information for the transformation phase of IPA-CP. */ 546 547 struct GTY(()) ipcp_transformation_summary 548 { 549 /* Linked list of known aggregate values. */ 550 ipa_agg_replacement_value *agg_values; 551 /* Known bits information. */ 552 vec<ipa_bits *, va_gc> *bits; 553 /* Value range information. */ 554 vec<ipa_vr, va_gc> *m_vr; 555 }; 556 557 void ipa_set_node_agg_value_chain (struct cgraph_node *node, 558 struct ipa_agg_replacement_value *aggvals); 559 void ipcp_grow_transformations_if_necessary (void); 560 561 /* ipa_edge_args stores information related to a callsite and particularly its 562 arguments. It can be accessed by the IPA_EDGE_REF macro. */ 563 564 class GTY((for_user)) ipa_edge_args 565 { 566 public: 567 568 /* Default constructor. */ 569 ipa_edge_args () : jump_functions (NULL), polymorphic_call_contexts (NULL) 570 {} 571 572 /* Destructor. */ 573 ~ipa_edge_args () 574 { 575 vec_free (jump_functions); 576 vec_free (polymorphic_call_contexts); 577 } 578 579 /* Vectors of the callsite's jump function and polymorphic context 580 information of each parameter. */ 581 vec<ipa_jump_func, va_gc> *jump_functions; 582 vec<ipa_polymorphic_call_context, va_gc> *polymorphic_call_contexts; 583 }; 584 585 /* ipa_edge_args access functions. Please use these to access fields that 586 are or will be shared among various passes. */ 587 588 /* Return the number of actual arguments. */ 589 590 static inline int 591 ipa_get_cs_argument_count (struct ipa_edge_args *args) 592 { 593 return vec_safe_length (args->jump_functions); 594 } 595 596 /* Returns a pointer to the jump function for the ith argument. Please note 597 there is no setter function as jump functions are all set up in 598 ipa_compute_jump_functions. */ 599 600 static inline struct ipa_jump_func * 601 ipa_get_ith_jump_func (struct ipa_edge_args *args, int i) 602 { 603 return &(*args->jump_functions)[i]; 604 } 605 606 /* Returns a pointer to the polymorphic call context for the ith argument. 607 NULL if contexts are not computed. */ 608 static inline struct ipa_polymorphic_call_context * 609 ipa_get_ith_polymorhic_call_context (struct ipa_edge_args *args, int i) 610 { 611 if (!args->polymorphic_call_contexts) 612 return NULL; 613 return &(*args->polymorphic_call_contexts)[i]; 614 } 615 616 /* Function summary for ipa_node_params. */ 617 class GTY((user)) ipa_node_params_t: public function_summary <ipa_node_params *> 618 { 619 public: 620 ipa_node_params_t (symbol_table *table, bool ggc): 621 function_summary<ipa_node_params *> (table, ggc) { } 622 623 /* Hook that is called by summary when a node is duplicated. */ 624 virtual void duplicate (cgraph_node *node, 625 cgraph_node *node2, 626 ipa_node_params *data, 627 ipa_node_params *data2); 628 }; 629 630 /* Summary to manange ipa_edge_args structures. */ 631 632 class GTY((user)) ipa_edge_args_sum_t : public call_summary <ipa_edge_args *> 633 { 634 public: 635 ipa_edge_args_sum_t (symbol_table *table, bool ggc) 636 : call_summary<ipa_edge_args *> (table, ggc) { } 637 638 /* Hook that is called by summary when an edge is duplicated. */ 639 virtual void remove (cgraph_edge *cs, ipa_edge_args *args); 640 /* Hook that is called by summary when an edge is duplicated. */ 641 virtual void duplicate (cgraph_edge *src, 642 cgraph_edge *dst, 643 ipa_edge_args *old_args, 644 ipa_edge_args *new_args); 645 }; 646 647 /* Function summary where the parameter infos are actually stored. */ 648 extern GTY(()) ipa_node_params_t * ipa_node_params_sum; 649 /* Call summary to store information about edges such as jump functions. */ 650 extern GTY(()) ipa_edge_args_sum_t *ipa_edge_args_sum; 651 652 /* Vector of IPA-CP transformation data for each clone. */ 653 extern GTY(()) vec<ipcp_transformation_summary, va_gc> *ipcp_transformations; 654 655 /* Return the associated parameter/argument info corresponding to the given 656 node/edge. */ 657 #define IPA_NODE_REF(NODE) (ipa_node_params_sum->get (NODE)) 658 #define IPA_EDGE_REF(EDGE) (ipa_edge_args_sum->get (EDGE)) 659 /* This macro checks validity of index returned by 660 ipa_get_param_decl_index function. */ 661 #define IS_VALID_JUMP_FUNC_INDEX(I) ((I) != -1) 662 663 /* Creating and freeing ipa_node_params and ipa_edge_args. */ 664 void ipa_create_all_node_params (void); 665 void ipa_create_all_edge_args (void); 666 void ipa_check_create_edge_args (void); 667 void ipa_free_edge_args_substructures (struct ipa_edge_args *); 668 void ipa_free_all_node_params (void); 669 void ipa_free_all_edge_args (void); 670 void ipa_free_all_structures_after_ipa_cp (void); 671 void ipa_free_all_structures_after_iinln (void); 672 673 void ipa_register_cgraph_hooks (void); 674 int count_formal_params (tree fndecl); 675 676 /* This function ensures the array of node param infos is big enough to 677 accommodate a structure for all nodes and reallocates it if not. */ 678 679 static inline void 680 ipa_check_create_node_params (void) 681 { 682 if (!ipa_node_params_sum) 683 ipa_node_params_sum 684 = (new (ggc_cleared_alloc <ipa_node_params_t> ()) 685 ipa_node_params_t (symtab, true)); 686 } 687 688 /* Returns true if edge summary contains a record for EDGE. The main purpose 689 of this function is that debug dumping function can check info availability 690 without causing allocations. */ 691 692 static inline bool 693 ipa_edge_args_info_available_for_edge_p (struct cgraph_edge *edge) 694 { 695 return ipa_edge_args_sum->exists (edge); 696 } 697 698 static inline ipcp_transformation_summary * 699 ipcp_get_transformation_summary (cgraph_node *node) 700 { 701 if ((unsigned) node->uid >= vec_safe_length (ipcp_transformations)) 702 return NULL; 703 return &(*ipcp_transformations)[node->uid]; 704 } 705 706 /* Return the aggregate replacements for NODE, if there are any. */ 707 708 static inline struct ipa_agg_replacement_value * 709 ipa_get_agg_replacements_for_node (cgraph_node *node) 710 { 711 ipcp_transformation_summary *ts = ipcp_get_transformation_summary (node); 712 return ts ? ts->agg_values : NULL; 713 } 714 715 /* Function formal parameters related computations. */ 716 void ipa_initialize_node_params (struct cgraph_node *node); 717 bool ipa_propagate_indirect_call_infos (struct cgraph_edge *cs, 718 vec<cgraph_edge *> *new_edges); 719 720 /* Indirect edge and binfo processing. */ 721 tree ipa_get_indirect_edge_target (struct cgraph_edge *ie, 722 vec<tree> , 723 vec<ipa_polymorphic_call_context>, 724 vec<ipa_agg_jump_function_p>, 725 bool *); 726 struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree, 727 bool speculative = false); 728 tree ipa_impossible_devirt_target (struct cgraph_edge *, tree); 729 ipa_bits *ipa_get_ipa_bits_for_value (const widest_int &value, 730 const widest_int &mask); 731 732 733 /* Functions related to both. */ 734 void ipa_analyze_node (struct cgraph_node *); 735 736 /* Aggregate jump function related functions. */ 737 tree ipa_find_agg_cst_for_param (struct ipa_agg_jump_function *agg, tree scalar, 738 HOST_WIDE_INT offset, bool by_ref, 739 bool *from_global_constant = NULL); 740 bool ipa_load_from_parm_agg (struct ipa_func_body_info *fbi, 741 vec<ipa_param_descriptor, va_gc> *descriptors, 742 gimple *stmt, tree op, int *index_p, 743 HOST_WIDE_INT *offset_p, HOST_WIDE_INT *size_p, 744 bool *by_ref, bool *guaranteed_unmodified = NULL); 745 746 /* Debugging interface. */ 747 void ipa_print_node_params (FILE *, struct cgraph_node *node); 748 void ipa_print_all_params (FILE *); 749 void ipa_print_node_jump_functions (FILE *f, struct cgraph_node *node); 750 void ipa_print_all_jump_functions (FILE * f); 751 void ipcp_verify_propagated_values (void); 752 753 template <typename value> 754 class ipcp_value; 755 756 extern object_allocator<ipcp_value<tree> > ipcp_cst_values_pool; 757 extern object_allocator<ipcp_value<ipa_polymorphic_call_context> > 758 ipcp_poly_ctx_values_pool; 759 760 template <typename valtype> 761 class ipcp_value_source; 762 763 extern object_allocator<ipcp_value_source<tree> > ipcp_sources_pool; 764 765 class ipcp_agg_lattice; 766 767 extern object_allocator<ipcp_agg_lattice> ipcp_agg_lattice_pool; 768 769 void ipa_dump_agg_replacement_values (FILE *f, 770 struct ipa_agg_replacement_value *av); 771 void ipa_prop_write_jump_functions (void); 772 void ipa_prop_read_jump_functions (void); 773 void ipcp_write_transformation_summaries (void); 774 void ipcp_read_transformation_summaries (void); 775 int ipa_get_param_decl_index (struct ipa_node_params *, tree); 776 tree ipa_value_from_jfunc (struct ipa_node_params *info, 777 struct ipa_jump_func *jfunc, tree type); 778 unsigned int ipcp_transform_function (struct cgraph_node *node); 779 ipa_polymorphic_call_context ipa_context_from_jfunc (ipa_node_params *, 780 cgraph_edge *, 781 int, 782 ipa_jump_func *); 783 void ipa_dump_param (FILE *, struct ipa_node_params *info, int i); 784 void ipa_release_body_info (struct ipa_func_body_info *); 785 tree ipa_get_callee_param_type (struct cgraph_edge *e, int i); 786 787 /* From tree-sra.c: */ 788 tree build_ref_for_offset (location_t, tree, poly_int64, bool, tree, 789 gimple_stmt_iterator *, bool); 790 791 /* In ipa-cp.c */ 792 void ipa_cp_c_finalize (void); 793 794 #endif /* IPA_PROP_H */ 795