| File: | build/gcc/tree-ssa-sccvn.cc |
| Warning: | line 8543, column 63 Division by zero |
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| 1 | /* SCC value numbering for trees |
| 2 | Copyright (C) 2006-2023 Free Software Foundation, Inc. |
| 3 | Contributed by Daniel Berlin <dan@dberlin.org> |
| 4 | |
| 5 | This file is part of GCC. |
| 6 | |
| 7 | GCC is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GCC is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GCC; see the file COPYING3. If not see |
| 19 | <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "config.h" |
| 22 | #include "system.h" |
| 23 | #include "coretypes.h" |
| 24 | #include "splay-tree.h" |
| 25 | #include "backend.h" |
| 26 | #include "rtl.h" |
| 27 | #include "tree.h" |
| 28 | #include "gimple.h" |
| 29 | #include "ssa.h" |
| 30 | #include "expmed.h" |
| 31 | #include "insn-config.h" |
| 32 | #include "memmodel.h" |
| 33 | #include "emit-rtl.h" |
| 34 | #include "cgraph.h" |
| 35 | #include "gimple-pretty-print.h" |
| 36 | #include "alias.h" |
| 37 | #include "fold-const.h" |
| 38 | #include "stor-layout.h" |
| 39 | #include "cfganal.h" |
| 40 | #include "tree-inline.h" |
| 41 | #include "internal-fn.h" |
| 42 | #include "gimple-iterator.h" |
| 43 | #include "gimple-fold.h" |
| 44 | #include "tree-eh.h" |
| 45 | #include "gimplify.h" |
| 46 | #include "flags.h" |
| 47 | #include "dojump.h" |
| 48 | #include "explow.h" |
| 49 | #include "calls.h" |
| 50 | #include "varasm.h" |
| 51 | #include "stmt.h" |
| 52 | #include "expr.h" |
| 53 | #include "tree-dfa.h" |
| 54 | #include "tree-ssa.h" |
| 55 | #include "dumpfile.h" |
| 56 | #include "cfgloop.h" |
| 57 | #include "tree-ssa-propagate.h" |
| 58 | #include "tree-cfg.h" |
| 59 | #include "domwalk.h" |
| 60 | #include "gimple-match.h" |
| 61 | #include "stringpool.h" |
| 62 | #include "attribs.h" |
| 63 | #include "tree-pass.h" |
| 64 | #include "statistics.h" |
| 65 | #include "langhooks.h" |
| 66 | #include "ipa-utils.h" |
| 67 | #include "dbgcnt.h" |
| 68 | #include "tree-cfgcleanup.h" |
| 69 | #include "tree-ssa-loop.h" |
| 70 | #include "tree-scalar-evolution.h" |
| 71 | #include "tree-ssa-loop-niter.h" |
| 72 | #include "builtins.h" |
| 73 | #include "fold-const-call.h" |
| 74 | #include "ipa-modref-tree.h" |
| 75 | #include "ipa-modref.h" |
| 76 | #include "tree-ssa-sccvn.h" |
| 77 | |
| 78 | /* This algorithm is based on the SCC algorithm presented by Keith |
| 79 | Cooper and L. Taylor Simpson in "SCC-Based Value numbering" |
| 80 | (http://citeseer.ist.psu.edu/41805.html). In |
| 81 | straight line code, it is equivalent to a regular hash based value |
| 82 | numbering that is performed in reverse postorder. |
| 83 | |
| 84 | For code with cycles, there are two alternatives, both of which |
| 85 | require keeping the hashtables separate from the actual list of |
| 86 | value numbers for SSA names. |
| 87 | |
| 88 | 1. Iterate value numbering in an RPO walk of the blocks, removing |
| 89 | all the entries from the hashtable after each iteration (but |
| 90 | keeping the SSA name->value number mapping between iterations). |
| 91 | Iterate until it does not change. |
| 92 | |
| 93 | 2. Perform value numbering as part of an SCC walk on the SSA graph, |
| 94 | iterating only the cycles in the SSA graph until they do not change |
| 95 | (using a separate, optimistic hashtable for value numbering the SCC |
| 96 | operands). |
| 97 | |
| 98 | The second is not just faster in practice (because most SSA graph |
| 99 | cycles do not involve all the variables in the graph), it also has |
| 100 | some nice properties. |
| 101 | |
| 102 | One of these nice properties is that when we pop an SCC off the |
| 103 | stack, we are guaranteed to have processed all the operands coming from |
| 104 | *outside of that SCC*, so we do not need to do anything special to |
| 105 | ensure they have value numbers. |
| 106 | |
| 107 | Another nice property is that the SCC walk is done as part of a DFS |
| 108 | of the SSA graph, which makes it easy to perform combining and |
| 109 | simplifying operations at the same time. |
| 110 | |
| 111 | The code below is deliberately written in a way that makes it easy |
| 112 | to separate the SCC walk from the other work it does. |
| 113 | |
| 114 | In order to propagate constants through the code, we track which |
| 115 | expressions contain constants, and use those while folding. In |
| 116 | theory, we could also track expressions whose value numbers are |
| 117 | replaced, in case we end up folding based on expression |
| 118 | identities. |
| 119 | |
| 120 | In order to value number memory, we assign value numbers to vuses. |
| 121 | This enables us to note that, for example, stores to the same |
| 122 | address of the same value from the same starting memory states are |
| 123 | equivalent. |
| 124 | TODO: |
| 125 | |
| 126 | 1. We can iterate only the changing portions of the SCC's, but |
| 127 | I have not seen an SCC big enough for this to be a win. |
| 128 | 2. If you differentiate between phi nodes for loops and phi nodes |
| 129 | for if-then-else, you can properly consider phi nodes in different |
| 130 | blocks for equivalence. |
| 131 | 3. We could value number vuses in more cases, particularly, whole |
| 132 | structure copies. |
| 133 | */ |
| 134 | |
| 135 | /* There's no BB_EXECUTABLE but we can use BB_VISITED. */ |
| 136 | #define BB_EXECUTABLE BB_VISITED |
| 137 | |
| 138 | static vn_lookup_kind default_vn_walk_kind; |
| 139 | |
| 140 | /* vn_nary_op hashtable helpers. */ |
| 141 | |
| 142 | struct vn_nary_op_hasher : nofree_ptr_hash <vn_nary_op_s> |
| 143 | { |
| 144 | typedef vn_nary_op_s *compare_type; |
| 145 | static inline hashval_t hash (const vn_nary_op_s *); |
| 146 | static inline bool equal (const vn_nary_op_s *, const vn_nary_op_s *); |
| 147 | }; |
| 148 | |
| 149 | /* Return the computed hashcode for nary operation P1. */ |
| 150 | |
| 151 | inline hashval_t |
| 152 | vn_nary_op_hasher::hash (const vn_nary_op_s *vno1) |
| 153 | { |
| 154 | return vno1->hashcode; |
| 155 | } |
| 156 | |
| 157 | /* Compare nary operations P1 and P2 and return true if they are |
| 158 | equivalent. */ |
| 159 | |
| 160 | inline bool |
| 161 | vn_nary_op_hasher::equal (const vn_nary_op_s *vno1, const vn_nary_op_s *vno2) |
| 162 | { |
| 163 | return vno1 == vno2 || vn_nary_op_eq (vno1, vno2); |
| 164 | } |
| 165 | |
| 166 | typedef hash_table<vn_nary_op_hasher> vn_nary_op_table_type; |
| 167 | typedef vn_nary_op_table_type::iterator vn_nary_op_iterator_type; |
| 168 | |
| 169 | |
| 170 | /* vn_phi hashtable helpers. */ |
| 171 | |
| 172 | static int |
| 173 | vn_phi_eq (const_vn_phi_t const vp1, const_vn_phi_t const vp2); |
| 174 | |
| 175 | struct vn_phi_hasher : nofree_ptr_hash <vn_phi_s> |
| 176 | { |
| 177 | static inline hashval_t hash (const vn_phi_s *); |
| 178 | static inline bool equal (const vn_phi_s *, const vn_phi_s *); |
| 179 | }; |
| 180 | |
| 181 | /* Return the computed hashcode for phi operation P1. */ |
| 182 | |
| 183 | inline hashval_t |
| 184 | vn_phi_hasher::hash (const vn_phi_s *vp1) |
| 185 | { |
| 186 | return vp1->hashcode; |
| 187 | } |
| 188 | |
| 189 | /* Compare two phi entries for equality, ignoring VN_TOP arguments. */ |
| 190 | |
| 191 | inline bool |
| 192 | vn_phi_hasher::equal (const vn_phi_s *vp1, const vn_phi_s *vp2) |
| 193 | { |
| 194 | return vp1 == vp2 || vn_phi_eq (vp1, vp2); |
| 195 | } |
| 196 | |
| 197 | typedef hash_table<vn_phi_hasher> vn_phi_table_type; |
| 198 | typedef vn_phi_table_type::iterator vn_phi_iterator_type; |
| 199 | |
| 200 | |
| 201 | /* Compare two reference operands P1 and P2 for equality. Return true if |
| 202 | they are equal, and false otherwise. */ |
| 203 | |
| 204 | static int |
| 205 | vn_reference_op_eq (const void *p1, const void *p2) |
| 206 | { |
| 207 | const_vn_reference_op_t const vro1 = (const_vn_reference_op_t) p1; |
| 208 | const_vn_reference_op_t const vro2 = (const_vn_reference_op_t) p2; |
| 209 | |
| 210 | return (vro1->opcode == vro2->opcode |
| 211 | /* We do not care for differences in type qualification. */ |
| 212 | && (vro1->type == vro2->type |
| 213 | || (vro1->type && vro2->type |
| 214 | && types_compatible_p (TYPE_MAIN_VARIANT (vro1->type)((tree_class_check ((vro1->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 214, __FUNCTION__))->type_common.main_variant), |
| 215 | TYPE_MAIN_VARIANT (vro2->type)((tree_class_check ((vro2->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 215, __FUNCTION__))->type_common.main_variant)))) |
| 216 | && expressions_equal_p (vro1->op0, vro2->op0) |
| 217 | && expressions_equal_p (vro1->op1, vro2->op1) |
| 218 | && expressions_equal_p (vro1->op2, vro2->op2) |
| 219 | && (vro1->opcode != CALL_EXPR || vro1->clique == vro2->clique)); |
| 220 | } |
| 221 | |
| 222 | /* Free a reference operation structure VP. */ |
| 223 | |
| 224 | static inline void |
| 225 | free_reference (vn_reference_s *vr) |
| 226 | { |
| 227 | vr->operands.release (); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | /* vn_reference hashtable helpers. */ |
| 232 | |
| 233 | struct vn_reference_hasher : nofree_ptr_hash <vn_reference_s> |
| 234 | { |
| 235 | static inline hashval_t hash (const vn_reference_s *); |
| 236 | static inline bool equal (const vn_reference_s *, const vn_reference_s *); |
| 237 | }; |
| 238 | |
| 239 | /* Return the hashcode for a given reference operation P1. */ |
| 240 | |
| 241 | inline hashval_t |
| 242 | vn_reference_hasher::hash (const vn_reference_s *vr1) |
| 243 | { |
| 244 | return vr1->hashcode; |
| 245 | } |
| 246 | |
| 247 | inline bool |
| 248 | vn_reference_hasher::equal (const vn_reference_s *v, const vn_reference_s *c) |
| 249 | { |
| 250 | return v == c || vn_reference_eq (v, c); |
| 251 | } |
| 252 | |
| 253 | typedef hash_table<vn_reference_hasher> vn_reference_table_type; |
| 254 | typedef vn_reference_table_type::iterator vn_reference_iterator_type; |
| 255 | |
| 256 | /* Pretty-print OPS to OUTFILE. */ |
| 257 | |
| 258 | void |
| 259 | print_vn_reference_ops (FILE *outfile, const vec<vn_reference_op_s> ops) |
| 260 | { |
| 261 | vn_reference_op_t vro; |
| 262 | unsigned int i; |
| 263 | fprintf (outfile, "{"); |
| 264 | for (i = 0; ops.iterate (i, &vro); i++) |
| 265 | { |
| 266 | bool closebrace = false; |
| 267 | if (vro->opcode != SSA_NAME |
| 268 | && TREE_CODE_CLASS (vro->opcode)tree_code_type_tmpl <0>::tree_code_type[(int) (vro-> opcode)] != tcc_declaration) |
| 269 | { |
| 270 | fprintf (outfile, "%s", get_tree_code_name (vro->opcode)); |
| 271 | if (vro->op0 || vro->opcode == CALL_EXPR) |
| 272 | { |
| 273 | fprintf (outfile, "<"); |
| 274 | closebrace = true; |
| 275 | } |
| 276 | } |
| 277 | if (vro->op0 || vro->opcode == CALL_EXPR) |
| 278 | { |
| 279 | if (!vro->op0) |
| 280 | fprintf (outfile, internal_fn_name ((internal_fn)vro->clique)); |
| 281 | else |
| 282 | print_generic_expr (outfile, vro->op0); |
| 283 | if (vro->op1) |
| 284 | { |
| 285 | fprintf (outfile, ","); |
| 286 | print_generic_expr (outfile, vro->op1); |
| 287 | } |
| 288 | if (vro->op2) |
| 289 | { |
| 290 | fprintf (outfile, ","); |
| 291 | print_generic_expr (outfile, vro->op2); |
| 292 | } |
| 293 | } |
| 294 | if (closebrace) |
| 295 | fprintf (outfile, ">"); |
| 296 | if (i != ops.length () - 1) |
| 297 | fprintf (outfile, ","); |
| 298 | } |
| 299 | fprintf (outfile, "}"); |
| 300 | } |
| 301 | |
| 302 | DEBUG_FUNCTION__attribute__ ((__used__)) void |
| 303 | debug_vn_reference_ops (const vec<vn_reference_op_s> ops) |
| 304 | { |
| 305 | print_vn_reference_ops (stderrstderr, ops); |
| 306 | fputc ('\n', stderrstderr); |
| 307 | } |
| 308 | |
| 309 | /* The set of VN hashtables. */ |
| 310 | |
| 311 | typedef struct vn_tables_s |
| 312 | { |
| 313 | vn_nary_op_table_type *nary; |
| 314 | vn_phi_table_type *phis; |
| 315 | vn_reference_table_type *references; |
| 316 | } *vn_tables_t; |
| 317 | |
| 318 | |
| 319 | /* vn_constant hashtable helpers. */ |
| 320 | |
| 321 | struct vn_constant_hasher : free_ptr_hash <vn_constant_s> |
| 322 | { |
| 323 | static inline hashval_t hash (const vn_constant_s *); |
| 324 | static inline bool equal (const vn_constant_s *, const vn_constant_s *); |
| 325 | }; |
| 326 | |
| 327 | /* Hash table hash function for vn_constant_t. */ |
| 328 | |
| 329 | inline hashval_t |
| 330 | vn_constant_hasher::hash (const vn_constant_s *vc1) |
| 331 | { |
| 332 | return vc1->hashcode; |
| 333 | } |
| 334 | |
| 335 | /* Hash table equality function for vn_constant_t. */ |
| 336 | |
| 337 | inline bool |
| 338 | vn_constant_hasher::equal (const vn_constant_s *vc1, const vn_constant_s *vc2) |
| 339 | { |
| 340 | if (vc1->hashcode != vc2->hashcode) |
| 341 | return false; |
| 342 | |
| 343 | return vn_constant_eq_with_type (vc1->constant, vc2->constant); |
| 344 | } |
| 345 | |
| 346 | static hash_table<vn_constant_hasher> *constant_to_value_id; |
| 347 | |
| 348 | |
| 349 | /* Obstack we allocate the vn-tables elements from. */ |
| 350 | static obstack vn_tables_obstack; |
| 351 | /* Special obstack we never unwind. */ |
| 352 | static obstack vn_tables_insert_obstack; |
| 353 | |
| 354 | static vn_reference_t last_inserted_ref; |
| 355 | static vn_phi_t last_inserted_phi; |
| 356 | static vn_nary_op_t last_inserted_nary; |
| 357 | static vn_ssa_aux_t last_pushed_avail; |
| 358 | |
| 359 | /* Valid hashtables storing information we have proven to be |
| 360 | correct. */ |
| 361 | static vn_tables_t valid_info; |
| 362 | |
| 363 | |
| 364 | /* Valueization hook for simplify_replace_tree. Valueize NAME if it is |
| 365 | an SSA name, otherwise just return it. */ |
| 366 | tree (*vn_valueize) (tree); |
| 367 | static tree |
| 368 | vn_valueize_for_srt (tree t, void* context ATTRIBUTE_UNUSED__attribute__ ((__unused__))) |
| 369 | { |
| 370 | basic_block saved_vn_context_bb = vn_context_bb; |
| 371 | /* Look for sth available at the definition block of the argument. |
| 372 | This avoids inconsistencies between availability there which |
| 373 | decides if the stmt can be removed and availability at the |
| 374 | use site. The SSA property ensures that things available |
| 375 | at the definition are also available at uses. */ |
| 376 | if (!SSA_NAME_IS_DEFAULT_DEF (t)(tree_check ((t), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 376, __FUNCTION__, (SSA_NAME)))->base.default_def_flag) |
| 377 | vn_context_bb = gimple_bb (SSA_NAME_DEF_STMT (t)(tree_check ((t), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 377, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt); |
| 378 | tree res = vn_valueize (t); |
| 379 | vn_context_bb = saved_vn_context_bb; |
| 380 | return res; |
| 381 | } |
| 382 | |
| 383 | |
| 384 | /* This represents the top of the VN lattice, which is the universal |
| 385 | value. */ |
| 386 | |
| 387 | tree VN_TOP; |
| 388 | |
| 389 | /* Unique counter for our value ids. */ |
| 390 | |
| 391 | static unsigned int next_value_id; |
| 392 | static int next_constant_value_id; |
| 393 | |
| 394 | |
| 395 | /* Table of vn_ssa_aux_t's, one per ssa_name. The vn_ssa_aux_t objects |
| 396 | are allocated on an obstack for locality reasons, and to free them |
| 397 | without looping over the vec. */ |
| 398 | |
| 399 | struct vn_ssa_aux_hasher : typed_noop_remove <vn_ssa_aux_t> |
| 400 | { |
| 401 | typedef vn_ssa_aux_t value_type; |
| 402 | typedef tree compare_type; |
| 403 | static inline hashval_t hash (const value_type &); |
| 404 | static inline bool equal (const value_type &, const compare_type &); |
| 405 | static inline void mark_deleted (value_type &) {} |
| 406 | static const bool empty_zero_p = true; |
| 407 | static inline void mark_empty (value_type &e) { e = NULLnullptr; } |
| 408 | static inline bool is_deleted (value_type &) { return false; } |
| 409 | static inline bool is_empty (value_type &e) { return e == NULLnullptr; } |
| 410 | }; |
| 411 | |
| 412 | hashval_t |
| 413 | vn_ssa_aux_hasher::hash (const value_type &entry) |
| 414 | { |
| 415 | return SSA_NAME_VERSION (entry->name)(tree_check ((entry->name), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 415, __FUNCTION__, (SSA_NAME)))->base.u.version; |
| 416 | } |
| 417 | |
| 418 | bool |
| 419 | vn_ssa_aux_hasher::equal (const value_type &entry, const compare_type &name) |
| 420 | { |
| 421 | return name == entry->name; |
| 422 | } |
| 423 | |
| 424 | static hash_table<vn_ssa_aux_hasher> *vn_ssa_aux_hash; |
| 425 | typedef hash_table<vn_ssa_aux_hasher>::iterator vn_ssa_aux_iterator_type; |
| 426 | static struct obstack vn_ssa_aux_obstack; |
| 427 | |
| 428 | static vn_nary_op_t vn_nary_op_insert_stmt (gimple *, tree); |
| 429 | static vn_nary_op_t vn_nary_op_insert_into (vn_nary_op_t, |
| 430 | vn_nary_op_table_type *); |
| 431 | static void init_vn_nary_op_from_pieces (vn_nary_op_t, unsigned int, |
| 432 | enum tree_code, tree, tree *); |
| 433 | static tree vn_lookup_simplify_result (gimple_match_op *); |
| 434 | static vn_reference_t vn_reference_lookup_or_insert_for_pieces |
| 435 | (tree, alias_set_type, alias_set_type, tree, |
| 436 | vec<vn_reference_op_s, va_heap>, tree); |
| 437 | |
| 438 | /* Return whether there is value numbering information for a given SSA name. */ |
| 439 | |
| 440 | bool |
| 441 | has_VN_INFO (tree name) |
| 442 | { |
| 443 | return vn_ssa_aux_hash->find_with_hash (name, SSA_NAME_VERSION (name)(tree_check ((name), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 443, __FUNCTION__, (SSA_NAME)))->base.u.version); |
| 444 | } |
| 445 | |
| 446 | vn_ssa_aux_t |
| 447 | VN_INFO (tree name) |
| 448 | { |
| 449 | vn_ssa_aux_t *res |
| 450 | = vn_ssa_aux_hash->find_slot_with_hash (name, SSA_NAME_VERSION (name)(tree_check ((name), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 450, __FUNCTION__, (SSA_NAME)))->base.u.version, |
| 451 | INSERT); |
| 452 | if (*res != NULLnullptr) |
| 453 | return *res; |
| 454 | |
| 455 | vn_ssa_aux_t newinfo = *res = XOBNEW (&vn_ssa_aux_obstack, struct vn_ssa_aux)((struct vn_ssa_aux *) __extension__ ({ struct obstack *__h = ((&vn_ssa_aux_obstack)); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (struct vn_ssa_aux))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t ) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h ); void *__value = (void *) __o1->object_base; if (__o1-> next_free == __value) __o1->maybe_empty_object = 1; __o1-> next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1 ->object_base) + (((__o1->next_free) - (__o1->object_base ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))) : (char *) (((ptrdiff_t) (__o1->next_free) + (__o1-> alignment_mask)) & ~(__o1->alignment_mask))); if ((size_t ) (__o1->next_free - (char *) __o1->chunk) > (size_t ) (__o1->chunk_limit - (char *) __o1->chunk)) __o1-> next_free = __o1->chunk_limit; __o1->object_base = __o1 ->next_free; __value; }); })); |
| 456 | memset (newinfo, 0, sizeof (struct vn_ssa_aux)); |
| 457 | newinfo->name = name; |
| 458 | newinfo->valnum = VN_TOP; |
| 459 | /* We are using the visited flag to handle uses with defs not within the |
| 460 | region being value-numbered. */ |
| 461 | newinfo->visited = false; |
| 462 | |
| 463 | /* Given we create the VN_INFOs on-demand now we have to do initialization |
| 464 | different than VN_TOP here. */ |
| 465 | if (SSA_NAME_IS_DEFAULT_DEF (name)(tree_check ((name), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 465, __FUNCTION__, (SSA_NAME)))->base.default_def_flag) |
| 466 | switch (TREE_CODE (SSA_NAME_VAR (name))((enum tree_code) (((tree_check ((name), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 466, __FUNCTION__, (SSA_NAME)))->ssa_name.var == (tree) nullptr || ((enum tree_code) ((name)->ssa_name.var)->base.code ) == IDENTIFIER_NODE ? (tree) nullptr : (name)->ssa_name.var ))->base.code)) |
| 467 | { |
| 468 | case VAR_DECL: |
| 469 | /* All undefined vars are VARYING. */ |
| 470 | newinfo->valnum = name; |
| 471 | newinfo->visited = true; |
| 472 | break; |
| 473 | |
| 474 | case PARM_DECL: |
| 475 | /* Parameters are VARYING but we can record a condition |
| 476 | if we know it is a non-NULL pointer. */ |
| 477 | newinfo->visited = true; |
| 478 | newinfo->valnum = name; |
| 479 | if (POINTER_TYPE_P (TREE_TYPE (name))(((enum tree_code) (((contains_struct_check ((name), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 479, __FUNCTION__))->typed.type))->base.code) == POINTER_TYPE || ((enum tree_code) (((contains_struct_check ((name), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 479, __FUNCTION__))->typed.type))->base.code) == REFERENCE_TYPE ) |
| 480 | && nonnull_arg_p (SSA_NAME_VAR (name)((tree_check ((name), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 480, __FUNCTION__, (SSA_NAME)))->ssa_name.var == (tree) nullptr || ((enum tree_code) ((name)->ssa_name.var)->base.code ) == IDENTIFIER_NODE ? (tree) nullptr : (name)->ssa_name.var ))) |
| 481 | { |
| 482 | tree ops[2]; |
| 483 | ops[0] = name; |
| 484 | ops[1] = build_int_cst (TREE_TYPE (name)((contains_struct_check ((name), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 484, __FUNCTION__))->typed.type), 0); |
| 485 | vn_nary_op_t nary; |
| 486 | /* Allocate from non-unwinding stack. */ |
| 487 | nary = alloc_vn_nary_op_noinit (2, &vn_tables_insert_obstack); |
| 488 | init_vn_nary_op_from_pieces (nary, 2, NE_EXPR, |
| 489 | boolean_type_nodeglobal_trees[TI_BOOLEAN_TYPE], ops); |
| 490 | nary->predicated_values = 0; |
| 491 | nary->u.result = boolean_true_nodeglobal_trees[TI_BOOLEAN_TRUE]; |
| 492 | vn_nary_op_insert_into (nary, valid_info->nary); |
| 493 | gcc_assert (nary->unwind_to == NULL)((void)(!(nary->unwind_to == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 493, __FUNCTION__), 0 : 0)); |
| 494 | /* Also do not link it into the undo chain. */ |
| 495 | last_inserted_nary = nary->next; |
| 496 | nary->next = (vn_nary_op_t)(void *)-1; |
| 497 | nary = alloc_vn_nary_op_noinit (2, &vn_tables_insert_obstack); |
| 498 | init_vn_nary_op_from_pieces (nary, 2, EQ_EXPR, |
| 499 | boolean_type_nodeglobal_trees[TI_BOOLEAN_TYPE], ops); |
| 500 | nary->predicated_values = 0; |
| 501 | nary->u.result = boolean_false_nodeglobal_trees[TI_BOOLEAN_FALSE]; |
| 502 | vn_nary_op_insert_into (nary, valid_info->nary); |
| 503 | gcc_assert (nary->unwind_to == NULL)((void)(!(nary->unwind_to == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 503, __FUNCTION__), 0 : 0)); |
| 504 | last_inserted_nary = nary->next; |
| 505 | nary->next = (vn_nary_op_t)(void *)-1; |
| 506 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 507 | { |
| 508 | fprintf (dump_file, "Recording "); |
| 509 | print_generic_expr (dump_file, name, TDF_SLIM); |
| 510 | fprintf (dump_file, " != 0\n"); |
| 511 | } |
| 512 | } |
| 513 | break; |
| 514 | |
| 515 | case RESULT_DECL: |
| 516 | /* If the result is passed by invisible reference the default |
| 517 | def is initialized, otherwise it's uninitialized. Still |
| 518 | undefined is varying. */ |
| 519 | newinfo->visited = true; |
| 520 | newinfo->valnum = name; |
| 521 | break; |
| 522 | |
| 523 | default: |
| 524 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 524, __FUNCTION__)); |
| 525 | } |
| 526 | return newinfo; |
| 527 | } |
| 528 | |
| 529 | /* Return the SSA value of X. */ |
| 530 | |
| 531 | inline tree |
| 532 | SSA_VAL (tree x, bool *visited = NULLnullptr) |
| 533 | { |
| 534 | vn_ssa_aux_t tem = vn_ssa_aux_hash->find_with_hash (x, SSA_NAME_VERSION (x)(tree_check ((x), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 534, __FUNCTION__, (SSA_NAME)))->base.u.version); |
| 535 | if (visited) |
| 536 | *visited = tem && tem->visited; |
| 537 | return tem && tem->visited ? tem->valnum : x; |
| 538 | } |
| 539 | |
| 540 | /* Return the SSA value of the VUSE x, supporting released VDEFs |
| 541 | during elimination which will value-number the VDEF to the |
| 542 | associated VUSE (but not substitute in the whole lattice). */ |
| 543 | |
| 544 | static inline tree |
| 545 | vuse_ssa_val (tree x) |
| 546 | { |
| 547 | if (!x) |
| 548 | return NULL_TREE(tree) nullptr; |
| 549 | |
| 550 | do |
| 551 | { |
| 552 | x = SSA_VAL (x); |
| 553 | gcc_assert (x != VN_TOP)((void)(!(x != VN_TOP) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 553, __FUNCTION__), 0 : 0)); |
| 554 | } |
| 555 | while (SSA_NAME_IN_FREE_LIST (x)(tree_check ((x), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 555, __FUNCTION__, (SSA_NAME)))->base.nothrow_flag); |
| 556 | |
| 557 | return x; |
| 558 | } |
| 559 | |
| 560 | /* Similar to the above but used as callback for walk_non_aliased_vuses |
| 561 | and thus should stop at unvisited VUSE to not walk across region |
| 562 | boundaries. */ |
| 563 | |
| 564 | static tree |
| 565 | vuse_valueize (tree vuse) |
| 566 | { |
| 567 | do |
| 568 | { |
| 569 | bool visited; |
| 570 | vuse = SSA_VAL (vuse, &visited); |
| 571 | if (!visited) |
| 572 | return NULL_TREE(tree) nullptr; |
| 573 | gcc_assert (vuse != VN_TOP)((void)(!(vuse != VN_TOP) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 573, __FUNCTION__), 0 : 0)); |
| 574 | } |
| 575 | while (SSA_NAME_IN_FREE_LIST (vuse)(tree_check ((vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 575, __FUNCTION__, (SSA_NAME)))->base.nothrow_flag); |
| 576 | return vuse; |
| 577 | } |
| 578 | |
| 579 | |
| 580 | /* Return the vn_kind the expression computed by the stmt should be |
| 581 | associated with. */ |
| 582 | |
| 583 | enum vn_kind |
| 584 | vn_get_stmt_kind (gimple *stmt) |
| 585 | { |
| 586 | switch (gimple_code (stmt)) |
| 587 | { |
| 588 | case GIMPLE_CALL: |
| 589 | return VN_REFERENCE; |
| 590 | case GIMPLE_PHI: |
| 591 | return VN_PHI; |
| 592 | case GIMPLE_ASSIGN: |
| 593 | { |
| 594 | enum tree_code code = gimple_assign_rhs_code (stmt); |
| 595 | tree rhs1 = gimple_assign_rhs1 (stmt); |
| 596 | switch (get_gimple_rhs_class (code)) |
| 597 | { |
| 598 | case GIMPLE_UNARY_RHS: |
| 599 | case GIMPLE_BINARY_RHS: |
| 600 | case GIMPLE_TERNARY_RHS: |
| 601 | return VN_NARY; |
| 602 | case GIMPLE_SINGLE_RHS: |
| 603 | switch (TREE_CODE_CLASS (code)tree_code_type_tmpl <0>::tree_code_type[(int) (code)]) |
| 604 | { |
| 605 | case tcc_reference: |
| 606 | /* VOP-less references can go through unary case. */ |
| 607 | if ((code == REALPART_EXPR |
| 608 | || code == IMAGPART_EXPR |
| 609 | || code == VIEW_CONVERT_EXPR |
| 610 | || code == BIT_FIELD_REF) |
| 611 | && (TREE_CODE (TREE_OPERAND (rhs1, 0))((enum tree_code) ((*((const_cast<tree*> (tree_operand_check ((rhs1), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 611, __FUNCTION__))))))->base.code) == SSA_NAME |
| 612 | || is_gimple_min_invariant (TREE_OPERAND (rhs1, 0)(*((const_cast<tree*> (tree_operand_check ((rhs1), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 612, __FUNCTION__)))))))) |
| 613 | return VN_NARY; |
| 614 | |
| 615 | /* Fallthrough. */ |
| 616 | case tcc_declaration: |
| 617 | return VN_REFERENCE; |
| 618 | |
| 619 | case tcc_constant: |
| 620 | return VN_CONSTANT; |
| 621 | |
| 622 | default: |
| 623 | if (code == ADDR_EXPR) |
| 624 | return (is_gimple_min_invariant (rhs1) |
| 625 | ? VN_CONSTANT : VN_REFERENCE); |
| 626 | else if (code == CONSTRUCTOR) |
| 627 | return VN_NARY; |
| 628 | return VN_NONE; |
| 629 | } |
| 630 | default: |
| 631 | return VN_NONE; |
| 632 | } |
| 633 | } |
| 634 | default: |
| 635 | return VN_NONE; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | /* Lookup a value id for CONSTANT and return it. If it does not |
| 640 | exist returns 0. */ |
| 641 | |
| 642 | unsigned int |
| 643 | get_constant_value_id (tree constant) |
| 644 | { |
| 645 | vn_constant_s **slot; |
| 646 | struct vn_constant_s vc; |
| 647 | |
| 648 | vc.hashcode = vn_hash_constant_with_type (constant); |
| 649 | vc.constant = constant; |
| 650 | slot = constant_to_value_id->find_slot (&vc, NO_INSERT); |
| 651 | if (slot) |
| 652 | return (*slot)->value_id; |
| 653 | return 0; |
| 654 | } |
| 655 | |
| 656 | /* Lookup a value id for CONSTANT, and if it does not exist, create a |
| 657 | new one and return it. If it does exist, return it. */ |
| 658 | |
| 659 | unsigned int |
| 660 | get_or_alloc_constant_value_id (tree constant) |
| 661 | { |
| 662 | vn_constant_s **slot; |
| 663 | struct vn_constant_s vc; |
| 664 | vn_constant_t vcp; |
| 665 | |
| 666 | /* If the hashtable isn't initialized we're not running from PRE and thus |
| 667 | do not need value-ids. */ |
| 668 | if (!constant_to_value_id) |
| 669 | return 0; |
| 670 | |
| 671 | vc.hashcode = vn_hash_constant_with_type (constant); |
| 672 | vc.constant = constant; |
| 673 | slot = constant_to_value_id->find_slot (&vc, INSERT); |
| 674 | if (*slot) |
| 675 | return (*slot)->value_id; |
| 676 | |
| 677 | vcp = XNEW (struct vn_constant_s)((struct vn_constant_s *) xmalloc (sizeof (struct vn_constant_s ))); |
| 678 | vcp->hashcode = vc.hashcode; |
| 679 | vcp->constant = constant; |
| 680 | vcp->value_id = get_next_constant_value_id (); |
| 681 | *slot = vcp; |
| 682 | return vcp->value_id; |
| 683 | } |
| 684 | |
| 685 | /* Compute the hash for a reference operand VRO1. */ |
| 686 | |
| 687 | static void |
| 688 | vn_reference_op_compute_hash (const vn_reference_op_t vro1, inchash::hash &hstate) |
| 689 | { |
| 690 | hstate.add_int (vro1->opcode); |
| 691 | if (vro1->opcode == CALL_EXPR && !vro1->op0) |
| 692 | hstate.add_int (vro1->clique); |
| 693 | if (vro1->op0) |
| 694 | inchash::add_expr (vro1->op0, hstate); |
| 695 | if (vro1->op1) |
| 696 | inchash::add_expr (vro1->op1, hstate); |
| 697 | if (vro1->op2) |
| 698 | inchash::add_expr (vro1->op2, hstate); |
| 699 | } |
| 700 | |
| 701 | /* Compute a hash for the reference operation VR1 and return it. */ |
| 702 | |
| 703 | static hashval_t |
| 704 | vn_reference_compute_hash (const vn_reference_t vr1) |
| 705 | { |
| 706 | inchash::hash hstate; |
| 707 | hashval_t result; |
| 708 | int i; |
| 709 | vn_reference_op_t vro; |
| 710 | poly_int64 off = -1; |
| 711 | bool deref = false; |
| 712 | |
| 713 | FOR_EACH_VEC_ELT (vr1->operands, i, vro)for (i = 0; (vr1->operands).iterate ((i), &(vro)); ++( i)) |
| 714 | { |
| 715 | if (vro->opcode == MEM_REF) |
| 716 | deref = true; |
| 717 | else if (vro->opcode != ADDR_EXPR) |
| 718 | deref = false; |
| 719 | if (maybe_ne (vro->off, -1)) |
| 720 | { |
| 721 | if (known_eq (off, -1)(!maybe_ne (off, -1))) |
| 722 | off = 0; |
| 723 | off += vro->off; |
| 724 | } |
| 725 | else |
| 726 | { |
| 727 | if (maybe_ne (off, -1) |
| 728 | && maybe_ne (off, 0)) |
| 729 | hstate.add_poly_int (off); |
| 730 | off = -1; |
| 731 | if (deref |
| 732 | && vro->opcode == ADDR_EXPR) |
| 733 | { |
| 734 | if (vro->op0) |
| 735 | { |
| 736 | tree op = TREE_OPERAND (vro->op0, 0)(*((const_cast<tree*> (tree_operand_check ((vro->op0 ), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 736, __FUNCTION__))))); |
| 737 | hstate.add_int (TREE_CODE (op)((enum tree_code) (op)->base.code)); |
| 738 | inchash::add_expr (op, hstate); |
| 739 | } |
| 740 | } |
| 741 | else |
| 742 | vn_reference_op_compute_hash (vro, hstate); |
| 743 | } |
| 744 | } |
| 745 | result = hstate.end (); |
| 746 | /* ??? We would ICE later if we hash instead of adding that in. */ |
| 747 | if (vr1->vuse) |
| 748 | result += SSA_NAME_VERSION (vr1->vuse)(tree_check ((vr1->vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 748, __FUNCTION__, (SSA_NAME)))->base.u.version; |
| 749 | |
| 750 | return result; |
| 751 | } |
| 752 | |
| 753 | /* Return true if reference operations VR1 and VR2 are equivalent. This |
| 754 | means they have the same set of operands and vuses. */ |
| 755 | |
| 756 | bool |
| 757 | vn_reference_eq (const_vn_reference_t const vr1, const_vn_reference_t const vr2) |
| 758 | { |
| 759 | unsigned i, j; |
| 760 | |
| 761 | /* Early out if this is not a hash collision. */ |
| 762 | if (vr1->hashcode != vr2->hashcode) |
| 763 | return false; |
| 764 | |
| 765 | /* The VOP needs to be the same. */ |
| 766 | if (vr1->vuse != vr2->vuse) |
| 767 | return false; |
| 768 | |
| 769 | /* If the operands are the same we are done. */ |
| 770 | if (vr1->operands == vr2->operands) |
| 771 | return true; |
| 772 | |
| 773 | if (!vr1->type || !vr2->type) |
| 774 | { |
| 775 | if (vr1->type != vr2->type) |
| 776 | return false; |
| 777 | } |
| 778 | else if (vr1->type == vr2->type) |
| 779 | ; |
| 780 | else if (COMPLETE_TYPE_P (vr1->type)(((tree_class_check ((vr1->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 780, __FUNCTION__))->type_common.size) != (tree) nullptr ) != COMPLETE_TYPE_P (vr2->type)(((tree_class_check ((vr2->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 780, __FUNCTION__))->type_common.size) != (tree) nullptr ) |
| 781 | || (COMPLETE_TYPE_P (vr1->type)(((tree_class_check ((vr1->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 781, __FUNCTION__))->type_common.size) != (tree) nullptr ) |
| 782 | && !expressions_equal_p (TYPE_SIZE (vr1->type)((tree_class_check ((vr1->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 782, __FUNCTION__))->type_common.size), |
| 783 | TYPE_SIZE (vr2->type)((tree_class_check ((vr2->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 783, __FUNCTION__))->type_common.size)))) |
| 784 | return false; |
| 785 | else if (vr1->operands[0].opcode == CALL_EXPR |
| 786 | && !types_compatible_p (vr1->type, vr2->type)) |
| 787 | return false; |
| 788 | else if (INTEGRAL_TYPE_P (vr1->type)(((enum tree_code) (vr1->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr1->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr1->type)->base.code) == INTEGER_TYPE ) |
| 789 | && INTEGRAL_TYPE_P (vr2->type)(((enum tree_code) (vr2->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr2->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr2->type)->base.code) == INTEGER_TYPE )) |
| 790 | { |
| 791 | if (TYPE_PRECISION (vr1->type)((tree_class_check ((vr1->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 791, __FUNCTION__))->type_common.precision) != TYPE_PRECISION (vr2->type)((tree_class_check ((vr2->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 791, __FUNCTION__))->type_common.precision)) |
| 792 | return false; |
| 793 | } |
| 794 | else if (INTEGRAL_TYPE_P (vr1->type)(((enum tree_code) (vr1->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr1->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr1->type)->base.code) == INTEGER_TYPE ) |
| 795 | && (TYPE_PRECISION (vr1->type)((tree_class_check ((vr1->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 795, __FUNCTION__))->type_common.precision) |
| 796 | != TREE_INT_CST_LOW (TYPE_SIZE (vr1->type))((unsigned long) (*tree_int_cst_elt_check ((((tree_class_check ((vr1->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 796, __FUNCTION__))->type_common.size)), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 796, __FUNCTION__))))) |
| 797 | return false; |
| 798 | else if (INTEGRAL_TYPE_P (vr2->type)(((enum tree_code) (vr2->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr2->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr2->type)->base.code) == INTEGER_TYPE ) |
| 799 | && (TYPE_PRECISION (vr2->type)((tree_class_check ((vr2->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 799, __FUNCTION__))->type_common.precision) |
| 800 | != TREE_INT_CST_LOW (TYPE_SIZE (vr2->type))((unsigned long) (*tree_int_cst_elt_check ((((tree_class_check ((vr2->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 800, __FUNCTION__))->type_common.size)), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 800, __FUNCTION__))))) |
| 801 | return false; |
| 802 | |
| 803 | i = 0; |
| 804 | j = 0; |
| 805 | do |
| 806 | { |
| 807 | poly_int64 off1 = 0, off2 = 0; |
| 808 | vn_reference_op_t vro1, vro2; |
| 809 | vn_reference_op_s tem1, tem2; |
| 810 | bool deref1 = false, deref2 = false; |
| 811 | bool reverse1 = false, reverse2 = false; |
| 812 | for (; vr1->operands.iterate (i, &vro1); i++) |
| 813 | { |
| 814 | if (vro1->opcode == MEM_REF) |
| 815 | deref1 = true; |
| 816 | /* Do not look through a storage order barrier. */ |
| 817 | else if (vro1->opcode == VIEW_CONVERT_EXPR && vro1->reverse) |
| 818 | return false; |
| 819 | reverse1 |= vro1->reverse; |
| 820 | if (known_eq (vro1->off, -1)(!maybe_ne (vro1->off, -1))) |
| 821 | break; |
| 822 | off1 += vro1->off; |
| 823 | } |
| 824 | for (; vr2->operands.iterate (j, &vro2); j++) |
| 825 | { |
| 826 | if (vro2->opcode == MEM_REF) |
| 827 | deref2 = true; |
| 828 | /* Do not look through a storage order barrier. */ |
| 829 | else if (vro2->opcode == VIEW_CONVERT_EXPR && vro2->reverse) |
| 830 | return false; |
| 831 | reverse2 |= vro2->reverse; |
| 832 | if (known_eq (vro2->off, -1)(!maybe_ne (vro2->off, -1))) |
| 833 | break; |
| 834 | off2 += vro2->off; |
| 835 | } |
| 836 | if (maybe_ne (off1, off2) || reverse1 != reverse2) |
| 837 | return false; |
| 838 | if (deref1 && vro1->opcode == ADDR_EXPR) |
| 839 | { |
| 840 | memset (&tem1, 0, sizeof (tem1)); |
| 841 | tem1.op0 = TREE_OPERAND (vro1->op0, 0)(*((const_cast<tree*> (tree_operand_check ((vro1->op0 ), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 841, __FUNCTION__))))); |
| 842 | tem1.type = TREE_TYPE (tem1.op0)((contains_struct_check ((tem1.op0), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 842, __FUNCTION__))->typed.type); |
| 843 | tem1.opcode = TREE_CODE (tem1.op0)((enum tree_code) (tem1.op0)->base.code); |
| 844 | vro1 = &tem1; |
| 845 | deref1 = false; |
| 846 | } |
| 847 | if (deref2 && vro2->opcode == ADDR_EXPR) |
| 848 | { |
| 849 | memset (&tem2, 0, sizeof (tem2)); |
| 850 | tem2.op0 = TREE_OPERAND (vro2->op0, 0)(*((const_cast<tree*> (tree_operand_check ((vro2->op0 ), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 850, __FUNCTION__))))); |
| 851 | tem2.type = TREE_TYPE (tem2.op0)((contains_struct_check ((tem2.op0), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 851, __FUNCTION__))->typed.type); |
| 852 | tem2.opcode = TREE_CODE (tem2.op0)((enum tree_code) (tem2.op0)->base.code); |
| 853 | vro2 = &tem2; |
| 854 | deref2 = false; |
| 855 | } |
| 856 | if (deref1 != deref2) |
| 857 | return false; |
| 858 | if (!vn_reference_op_eq (vro1, vro2)) |
| 859 | return false; |
| 860 | ++j; |
| 861 | ++i; |
| 862 | } |
| 863 | while (vr1->operands.length () != i |
| 864 | || vr2->operands.length () != j); |
| 865 | |
| 866 | return true; |
| 867 | } |
| 868 | |
| 869 | /* Copy the operations present in load/store REF into RESULT, a vector of |
| 870 | vn_reference_op_s's. */ |
| 871 | |
| 872 | static void |
| 873 | copy_reference_ops_from_ref (tree ref, vec<vn_reference_op_s> *result) |
| 874 | { |
| 875 | /* For non-calls, store the information that makes up the address. */ |
| 876 | tree orig = ref; |
| 877 | while (ref) |
| 878 | { |
| 879 | vn_reference_op_s temp; |
| 880 | |
| 881 | memset (&temp, 0, sizeof (temp)); |
| 882 | temp.type = TREE_TYPE (ref)((contains_struct_check ((ref), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 882, __FUNCTION__))->typed.type); |
| 883 | temp.opcode = TREE_CODE (ref)((enum tree_code) (ref)->base.code); |
| 884 | temp.off = -1; |
| 885 | |
| 886 | switch (temp.opcode) |
| 887 | { |
| 888 | case MODIFY_EXPR: |
| 889 | temp.op0 = TREE_OPERAND (ref, 1)(*((const_cast<tree*> (tree_operand_check ((ref), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 889, __FUNCTION__))))); |
| 890 | break; |
| 891 | case WITH_SIZE_EXPR: |
| 892 | temp.op0 = TREE_OPERAND (ref, 1)(*((const_cast<tree*> (tree_operand_check ((ref), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 892, __FUNCTION__))))); |
| 893 | temp.off = 0; |
| 894 | break; |
| 895 | case MEM_REF: |
| 896 | /* The base address gets its own vn_reference_op_s structure. */ |
| 897 | temp.op0 = TREE_OPERAND (ref, 1)(*((const_cast<tree*> (tree_operand_check ((ref), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 897, __FUNCTION__))))); |
| 898 | if (!mem_ref_offset (ref).to_shwi (&temp.off)) |
| 899 | temp.off = -1; |
| 900 | temp.clique = MR_DEPENDENCE_CLIQUE (ref)((tree_check2 ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 900, __FUNCTION__, (MEM_REF), (TARGET_MEM_REF)))->base.u .dependence_info.clique); |
| 901 | temp.base = MR_DEPENDENCE_BASE (ref)((tree_check2 ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 901, __FUNCTION__, (MEM_REF), (TARGET_MEM_REF)))->base.u .dependence_info.base); |
| 902 | temp.reverse = REF_REVERSE_STORAGE_ORDER (ref)((tree_check2 ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 902, __FUNCTION__, (BIT_FIELD_REF), (MEM_REF)))->base.default_def_flag ); |
| 903 | break; |
| 904 | case TARGET_MEM_REF: |
| 905 | /* The base address gets its own vn_reference_op_s structure. */ |
| 906 | temp.op0 = TMR_INDEX (ref)((*((const_cast<tree*> (tree_operand_check (((tree_check ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 906, __FUNCTION__, (TARGET_MEM_REF)))), (2), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 906, __FUNCTION__)))))); |
| 907 | temp.op1 = TMR_STEP (ref)((*((const_cast<tree*> (tree_operand_check (((tree_check ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 907, __FUNCTION__, (TARGET_MEM_REF)))), (3), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 907, __FUNCTION__)))))); |
| 908 | temp.op2 = TMR_OFFSET (ref)((*((const_cast<tree*> (tree_operand_check (((tree_check ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 908, __FUNCTION__, (TARGET_MEM_REF)))), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 908, __FUNCTION__)))))); |
| 909 | temp.clique = MR_DEPENDENCE_CLIQUE (ref)((tree_check2 ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 909, __FUNCTION__, (MEM_REF), (TARGET_MEM_REF)))->base.u .dependence_info.clique); |
| 910 | temp.base = MR_DEPENDENCE_BASE (ref)((tree_check2 ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 910, __FUNCTION__, (MEM_REF), (TARGET_MEM_REF)))->base.u .dependence_info.base); |
| 911 | result->safe_push (temp); |
| 912 | memset (&temp, 0, sizeof (temp)); |
| 913 | temp.type = NULL_TREE(tree) nullptr; |
| 914 | temp.opcode = ERROR_MARK; |
| 915 | temp.op0 = TMR_INDEX2 (ref)((*((const_cast<tree*> (tree_operand_check (((tree_check ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 915, __FUNCTION__, (TARGET_MEM_REF)))), (4), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 915, __FUNCTION__)))))); |
| 916 | temp.off = -1; |
| 917 | break; |
| 918 | case BIT_FIELD_REF: |
| 919 | /* Record bits, position and storage order. */ |
| 920 | temp.op0 = TREE_OPERAND (ref, 1)(*((const_cast<tree*> (tree_operand_check ((ref), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 920, __FUNCTION__))))); |
| 921 | temp.op1 = TREE_OPERAND (ref, 2)(*((const_cast<tree*> (tree_operand_check ((ref), (2), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 921, __FUNCTION__))))); |
| 922 | if (!multiple_p (bit_field_offset (ref), BITS_PER_UNIT(8), &temp.off)) |
| 923 | temp.off = -1; |
| 924 | temp.reverse = REF_REVERSE_STORAGE_ORDER (ref)((tree_check2 ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 924, __FUNCTION__, (BIT_FIELD_REF), (MEM_REF)))->base.default_def_flag ); |
| 925 | break; |
| 926 | case COMPONENT_REF: |
| 927 | /* The field decl is enough to unambiguously specify the field, |
| 928 | so use its type here. */ |
| 929 | temp.type = TREE_TYPE (TREE_OPERAND (ref, 1))((contains_struct_check (((*((const_cast<tree*> (tree_operand_check ((ref), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 929, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 929, __FUNCTION__))->typed.type); |
| 930 | temp.op0 = TREE_OPERAND (ref, 1)(*((const_cast<tree*> (tree_operand_check ((ref), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 930, __FUNCTION__))))); |
| 931 | temp.op1 = TREE_OPERAND (ref, 2)(*((const_cast<tree*> (tree_operand_check ((ref), (2), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 931, __FUNCTION__))))); |
| 932 | temp.reverse = (AGGREGATE_TYPE_P (TREE_TYPE (TREE_OPERAND (ref, 0)))(((enum tree_code) (((contains_struct_check (((*((const_cast< tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 932, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 932, __FUNCTION__))->typed.type))->base.code) == ARRAY_TYPE || (((enum tree_code) (((contains_struct_check (((*((const_cast <tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 932, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 932, __FUNCTION__))->typed.type))->base.code) == RECORD_TYPE || ((enum tree_code) (((contains_struct_check (((*((const_cast <tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 932, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 932, __FUNCTION__))->typed.type))->base.code) == UNION_TYPE || ((enum tree_code) (((contains_struct_check (((*((const_cast <tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 932, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 932, __FUNCTION__))->typed.type))->base.code) == QUAL_UNION_TYPE )) |
| 933 | && TYPE_REVERSE_STORAGE_ORDER((tree_check4 ((((contains_struct_check (((*((const_cast<tree *> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 934, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 934, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 934, __FUNCTION__, (RECORD_TYPE), (UNION_TYPE), (QUAL_UNION_TYPE ), (ARRAY_TYPE)))->base.u.bits.saturating_flag) |
| 934 | (TREE_TYPE (TREE_OPERAND (ref, 0)))((tree_check4 ((((contains_struct_check (((*((const_cast<tree *> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 934, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 934, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 934, __FUNCTION__, (RECORD_TYPE), (UNION_TYPE), (QUAL_UNION_TYPE ), (ARRAY_TYPE)))->base.u.bits.saturating_flag)); |
| 935 | { |
| 936 | tree this_offset = component_ref_field_offset (ref); |
| 937 | if (this_offset |
| 938 | && poly_int_tree_p (this_offset)) |
| 939 | { |
| 940 | tree bit_offset = DECL_FIELD_BIT_OFFSET (TREE_OPERAND (ref, 1))((tree_check (((*((const_cast<tree*> (tree_operand_check ((ref), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 940, __FUNCTION__)))))), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 940, __FUNCTION__, (FIELD_DECL)))->field_decl.bit_offset ); |
| 941 | if (TREE_INT_CST_LOW (bit_offset)((unsigned long) (*tree_int_cst_elt_check ((bit_offset), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 941, __FUNCTION__))) % BITS_PER_UNIT(8) == 0) |
| 942 | { |
| 943 | poly_offset_int off |
| 944 | = (wi::to_poly_offset (this_offset) |
| 945 | + (wi::to_offset (bit_offset) >> LOG2_BITS_PER_UNIT3)); |
| 946 | /* Probibit value-numbering zero offset components |
| 947 | of addresses the same before the pass folding |
| 948 | __builtin_object_size had a chance to run. */ |
| 949 | if (TREE_CODE (orig)((enum tree_code) (orig)->base.code) != ADDR_EXPR |
| 950 | || maybe_ne (off, 0) |
| 951 | || (cfun(cfun + 0)->curr_properties & PROP_objsz(1 << 4))) |
| 952 | off.to_shwi (&temp.off); |
| 953 | } |
| 954 | } |
| 955 | } |
| 956 | break; |
| 957 | case ARRAY_RANGE_REF: |
| 958 | case ARRAY_REF: |
| 959 | { |
| 960 | tree eltype = TREE_TYPE (TREE_TYPE (TREE_OPERAND (ref, 0)))((contains_struct_check ((((contains_struct_check (((*((const_cast <tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 960, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 960, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 960, __FUNCTION__))->typed.type); |
| 961 | /* Record index as operand. */ |
| 962 | temp.op0 = TREE_OPERAND (ref, 1)(*((const_cast<tree*> (tree_operand_check ((ref), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 962, __FUNCTION__))))); |
| 963 | /* Always record lower bounds and element size. */ |
| 964 | temp.op1 = array_ref_low_bound (ref); |
| 965 | /* But record element size in units of the type alignment. */ |
| 966 | temp.op2 = TREE_OPERAND (ref, 3)(*((const_cast<tree*> (tree_operand_check ((ref), (3), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 966, __FUNCTION__))))); |
| 967 | temp.align = eltype->type_common.align; |
| 968 | if (! temp.op2) |
| 969 | temp.op2 = size_binop (EXACT_DIV_EXPR, TYPE_SIZE_UNIT (eltype),size_binop_loc (((location_t) 0), EXACT_DIV_EXPR, ((tree_class_check ((eltype), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 969, __FUNCTION__))->type_common.size_unit), size_int_kind (((((tree_class_check ((eltype), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 970, __FUNCTION__))->type_common.align) ? ((unsigned)1) << (((tree_class_check ((eltype), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 970, __FUNCTION__))->type_common.align) - 1) : 0) / (8)) , stk_sizetype)) |
| 970 | size_int (TYPE_ALIGN_UNIT (eltype)))size_binop_loc (((location_t) 0), EXACT_DIV_EXPR, ((tree_class_check ((eltype), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 969, __FUNCTION__))->type_common.size_unit), size_int_kind (((((tree_class_check ((eltype), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 970, __FUNCTION__))->type_common.align) ? ((unsigned)1) << (((tree_class_check ((eltype), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 970, __FUNCTION__))->type_common.align) - 1) : 0) / (8)) , stk_sizetype)); |
| 971 | if (poly_int_tree_p (temp.op0) |
| 972 | && poly_int_tree_p (temp.op1) |
| 973 | && TREE_CODE (temp.op2)((enum tree_code) (temp.op2)->base.code) == INTEGER_CST) |
| 974 | { |
| 975 | poly_offset_int off = ((wi::to_poly_offset (temp.op0) |
| 976 | - wi::to_poly_offset (temp.op1)) |
| 977 | * wi::to_offset (temp.op2) |
| 978 | * vn_ref_op_align_unit (&temp)); |
| 979 | off.to_shwi (&temp.off); |
| 980 | } |
| 981 | temp.reverse = (AGGREGATE_TYPE_P (TREE_TYPE (TREE_OPERAND (ref, 0)))(((enum tree_code) (((contains_struct_check (((*((const_cast< tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 981, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 981, __FUNCTION__))->typed.type))->base.code) == ARRAY_TYPE || (((enum tree_code) (((contains_struct_check (((*((const_cast <tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 981, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 981, __FUNCTION__))->typed.type))->base.code) == RECORD_TYPE || ((enum tree_code) (((contains_struct_check (((*((const_cast <tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 981, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 981, __FUNCTION__))->typed.type))->base.code) == UNION_TYPE || ((enum tree_code) (((contains_struct_check (((*((const_cast <tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 981, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 981, __FUNCTION__))->typed.type))->base.code) == QUAL_UNION_TYPE )) |
| 982 | && TYPE_REVERSE_STORAGE_ORDER((tree_check4 ((((contains_struct_check (((*((const_cast<tree *> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 983, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 983, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 983, __FUNCTION__, (RECORD_TYPE), (UNION_TYPE), (QUAL_UNION_TYPE ), (ARRAY_TYPE)))->base.u.bits.saturating_flag) |
| 983 | (TREE_TYPE (TREE_OPERAND (ref, 0)))((tree_check4 ((((contains_struct_check (((*((const_cast<tree *> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 983, __FUNCTION__)))))), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 983, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 983, __FUNCTION__, (RECORD_TYPE), (UNION_TYPE), (QUAL_UNION_TYPE ), (ARRAY_TYPE)))->base.u.bits.saturating_flag)); |
| 984 | } |
| 985 | break; |
| 986 | case VAR_DECL: |
| 987 | if (DECL_HARD_REGISTER (ref)((tree_check ((ref), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 987, __FUNCTION__, (VAR_DECL)))->decl_with_vis.hard_register )) |
| 988 | { |
| 989 | temp.op0 = ref; |
| 990 | break; |
| 991 | } |
| 992 | /* Fallthru. */ |
| 993 | case PARM_DECL: |
| 994 | case CONST_DECL: |
| 995 | case RESULT_DECL: |
| 996 | /* Canonicalize decls to MEM[&decl] which is what we end up with |
| 997 | when valueizing MEM[ptr] with ptr = &decl. */ |
| 998 | temp.opcode = MEM_REF; |
| 999 | temp.op0 = build_int_cst (build_pointer_type (TREE_TYPE (ref)((contains_struct_check ((ref), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 999, __FUNCTION__))->typed.type)), 0); |
| 1000 | temp.off = 0; |
| 1001 | result->safe_push (temp); |
| 1002 | temp.opcode = ADDR_EXPR; |
| 1003 | temp.op0 = build1 (ADDR_EXPR, TREE_TYPE (temp.op0)((contains_struct_check ((temp.op0), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1003, __FUNCTION__))->typed.type), ref); |
| 1004 | temp.type = TREE_TYPE (temp.op0)((contains_struct_check ((temp.op0), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1004, __FUNCTION__))->typed.type); |
| 1005 | temp.off = -1; |
| 1006 | break; |
| 1007 | case STRING_CST: |
| 1008 | case INTEGER_CST: |
| 1009 | case POLY_INT_CST: |
| 1010 | case COMPLEX_CST: |
| 1011 | case VECTOR_CST: |
| 1012 | case REAL_CST: |
| 1013 | case FIXED_CST: |
| 1014 | case CONSTRUCTOR: |
| 1015 | case SSA_NAME: |
| 1016 | temp.op0 = ref; |
| 1017 | break; |
| 1018 | case ADDR_EXPR: |
| 1019 | if (is_gimple_min_invariant (ref)) |
| 1020 | { |
| 1021 | temp.op0 = ref; |
| 1022 | break; |
| 1023 | } |
| 1024 | break; |
| 1025 | /* These are only interesting for their operands, their |
| 1026 | existence, and their type. They will never be the last |
| 1027 | ref in the chain of references (IE they require an |
| 1028 | operand), so we don't have to put anything |
| 1029 | for op* as it will be handled by the iteration */ |
| 1030 | case REALPART_EXPR: |
| 1031 | temp.off = 0; |
| 1032 | break; |
| 1033 | case VIEW_CONVERT_EXPR: |
| 1034 | temp.off = 0; |
| 1035 | temp.reverse = storage_order_barrier_p (ref); |
| 1036 | break; |
| 1037 | case IMAGPART_EXPR: |
| 1038 | /* This is only interesting for its constant offset. */ |
| 1039 | temp.off = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (TREE_TYPE (ref)))((unsigned long) (*tree_int_cst_elt_check ((((tree_class_check ((((contains_struct_check ((ref), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1039, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1039, __FUNCTION__))->type_common.size_unit)), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1039, __FUNCTION__))); |
| 1040 | break; |
| 1041 | default: |
| 1042 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1042, __FUNCTION__)); |
| 1043 | } |
| 1044 | result->safe_push (temp); |
| 1045 | |
| 1046 | if (REFERENCE_CLASS_P (ref)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (ref)->base.code))] == tcc_reference) |
| 1047 | || TREE_CODE (ref)((enum tree_code) (ref)->base.code) == MODIFY_EXPR |
| 1048 | || TREE_CODE (ref)((enum tree_code) (ref)->base.code) == WITH_SIZE_EXPR |
| 1049 | || (TREE_CODE (ref)((enum tree_code) (ref)->base.code) == ADDR_EXPR |
| 1050 | && !is_gimple_min_invariant (ref))) |
| 1051 | ref = TREE_OPERAND (ref, 0)(*((const_cast<tree*> (tree_operand_check ((ref), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1051, __FUNCTION__))))); |
| 1052 | else |
| 1053 | ref = NULL_TREE(tree) nullptr; |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | /* Build a alias-oracle reference abstraction in *REF from the vn_reference |
| 1058 | operands in *OPS, the reference alias set SET and the reference type TYPE. |
| 1059 | Return true if something useful was produced. */ |
| 1060 | |
| 1061 | bool |
| 1062 | ao_ref_init_from_vn_reference (ao_ref *ref, |
| 1063 | alias_set_type set, alias_set_type base_set, |
| 1064 | tree type, const vec<vn_reference_op_s> &ops) |
| 1065 | { |
| 1066 | unsigned i; |
| 1067 | tree base = NULL_TREE(tree) nullptr; |
| 1068 | tree *op0_p = &base; |
| 1069 | poly_offset_int offset = 0; |
| 1070 | poly_offset_int max_size; |
| 1071 | poly_offset_int size = -1; |
| 1072 | tree size_tree = NULL_TREE(tree) nullptr; |
| 1073 | |
| 1074 | /* We don't handle calls. */ |
| 1075 | if (!type) |
| 1076 | return false; |
| 1077 | |
| 1078 | machine_mode mode = TYPE_MODE (type)((((enum tree_code) ((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1078, __FUNCTION__)))->base.code) == VECTOR_TYPE) ? vector_type_mode (type) : (type)->type_common.mode); |
| 1079 | if (mode == BLKmode((void) 0, E_BLKmode)) |
| 1080 | size_tree = TYPE_SIZE (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1080, __FUNCTION__))->type_common.size); |
| 1081 | else |
| 1082 | size = GET_MODE_BITSIZE (mode); |
| 1083 | if (size_tree != NULL_TREE(tree) nullptr |
| 1084 | && poly_int_tree_p (size_tree)) |
| 1085 | size = wi::to_poly_offset (size_tree); |
| 1086 | |
| 1087 | /* Lower the final access size from the outermost expression. */ |
| 1088 | const_vn_reference_op_t cst_op = &ops[0]; |
| 1089 | /* Cast away constness for the sake of the const-unsafe |
| 1090 | FOR_EACH_VEC_ELT(). */ |
| 1091 | vn_reference_op_t op = const_cast<vn_reference_op_t>(cst_op); |
| 1092 | size_tree = NULL_TREE(tree) nullptr; |
| 1093 | if (op->opcode == COMPONENT_REF) |
| 1094 | size_tree = DECL_SIZE (op->op0)((contains_struct_check ((op->op0), (TS_DECL_COMMON), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1094, __FUNCTION__))->decl_common.size); |
| 1095 | else if (op->opcode == BIT_FIELD_REF) |
| 1096 | size_tree = op->op0; |
| 1097 | if (size_tree != NULL_TREE(tree) nullptr |
| 1098 | && poly_int_tree_p (size_tree) |
| 1099 | && (!known_size_p (size) |
| 1100 | || known_lt (wi::to_poly_offset (size_tree), size)(!maybe_le (size, wi::to_poly_offset (size_tree))))) |
| 1101 | size = wi::to_poly_offset (size_tree); |
| 1102 | |
| 1103 | /* Initially, maxsize is the same as the accessed element size. |
| 1104 | In the following it will only grow (or become -1). */ |
| 1105 | max_size = size; |
| 1106 | |
| 1107 | /* Compute cumulative bit-offset for nested component-refs and array-refs, |
| 1108 | and find the ultimate containing object. */ |
| 1109 | FOR_EACH_VEC_ELT (ops, i, op)for (i = 0; (ops).iterate ((i), &(op)); ++(i)) |
| 1110 | { |
| 1111 | switch (op->opcode) |
| 1112 | { |
| 1113 | /* These may be in the reference ops, but we cannot do anything |
| 1114 | sensible with them here. */ |
| 1115 | case ADDR_EXPR: |
| 1116 | /* Apart from ADDR_EXPR arguments to MEM_REF. */ |
| 1117 | if (base != NULL_TREE(tree) nullptr |
| 1118 | && TREE_CODE (base)((enum tree_code) (base)->base.code) == MEM_REF |
| 1119 | && op->op0 |
| 1120 | && DECL_P (TREE_OPERAND (op->op0, 0))(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) ((*((const_cast<tree*> (tree_operand_check ((op->op0 ), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1120, __FUNCTION__))))))->base.code))] == tcc_declaration )) |
| 1121 | { |
| 1122 | const_vn_reference_op_t pop = &ops[i-1]; |
| 1123 | base = TREE_OPERAND (op->op0, 0)(*((const_cast<tree*> (tree_operand_check ((op->op0) , (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1123, __FUNCTION__))))); |
| 1124 | if (known_eq (pop->off, -1)(!maybe_ne (pop->off, -1))) |
| 1125 | { |
| 1126 | max_size = -1; |
| 1127 | offset = 0; |
| 1128 | } |
| 1129 | else |
| 1130 | offset += pop->off * BITS_PER_UNIT(8); |
| 1131 | op0_p = NULLnullptr; |
| 1132 | break; |
| 1133 | } |
| 1134 | /* Fallthru. */ |
| 1135 | case CALL_EXPR: |
| 1136 | return false; |
| 1137 | |
| 1138 | /* Record the base objects. */ |
| 1139 | case MEM_REF: |
| 1140 | *op0_p = build2 (MEM_REF, op->type, |
| 1141 | NULL_TREE(tree) nullptr, op->op0); |
| 1142 | MR_DEPENDENCE_CLIQUE (*op0_p)((tree_check2 ((*op0_p), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1142, __FUNCTION__, (MEM_REF), (TARGET_MEM_REF)))->base. u.dependence_info.clique) = op->clique; |
| 1143 | MR_DEPENDENCE_BASE (*op0_p)((tree_check2 ((*op0_p), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1143, __FUNCTION__, (MEM_REF), (TARGET_MEM_REF)))->base. u.dependence_info.base) = op->base; |
| 1144 | op0_p = &TREE_OPERAND (*op0_p, 0)(*((const_cast<tree*> (tree_operand_check ((*op0_p), (0 ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1144, __FUNCTION__))))); |
| 1145 | break; |
| 1146 | |
| 1147 | case VAR_DECL: |
| 1148 | case PARM_DECL: |
| 1149 | case RESULT_DECL: |
| 1150 | case SSA_NAME: |
| 1151 | *op0_p = op->op0; |
| 1152 | op0_p = NULLnullptr; |
| 1153 | break; |
| 1154 | |
| 1155 | /* And now the usual component-reference style ops. */ |
| 1156 | case BIT_FIELD_REF: |
| 1157 | offset += wi::to_poly_offset (op->op1); |
| 1158 | break; |
| 1159 | |
| 1160 | case COMPONENT_REF: |
| 1161 | { |
| 1162 | tree field = op->op0; |
| 1163 | /* We do not have a complete COMPONENT_REF tree here so we |
| 1164 | cannot use component_ref_field_offset. Do the interesting |
| 1165 | parts manually. */ |
| 1166 | tree this_offset = DECL_FIELD_OFFSET (field)((tree_check ((field), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1166, __FUNCTION__, (FIELD_DECL)))->field_decl.offset); |
| 1167 | |
| 1168 | if (op->op1 || !poly_int_tree_p (this_offset)) |
| 1169 | max_size = -1; |
| 1170 | else |
| 1171 | { |
| 1172 | poly_offset_int woffset = (wi::to_poly_offset (this_offset) |
| 1173 | << LOG2_BITS_PER_UNIT3); |
| 1174 | woffset += wi::to_offset (DECL_FIELD_BIT_OFFSET (field)((tree_check ((field), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1174, __FUNCTION__, (FIELD_DECL)))->field_decl.bit_offset )); |
| 1175 | offset += woffset; |
| 1176 | } |
| 1177 | break; |
| 1178 | } |
| 1179 | |
| 1180 | case ARRAY_RANGE_REF: |
| 1181 | case ARRAY_REF: |
| 1182 | /* We recorded the lower bound and the element size. */ |
| 1183 | if (!poly_int_tree_p (op->op0) |
| 1184 | || !poly_int_tree_p (op->op1) |
| 1185 | || TREE_CODE (op->op2)((enum tree_code) (op->op2)->base.code) != INTEGER_CST) |
| 1186 | max_size = -1; |
| 1187 | else |
| 1188 | { |
| 1189 | poly_offset_int woffset |
| 1190 | = wi::sext (wi::to_poly_offset (op->op0) |
| 1191 | - wi::to_poly_offset (op->op1), |
| 1192 | TYPE_PRECISION (sizetype)((tree_class_check ((sizetype_tab[(int) stk_sizetype]), (tcc_type ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1192, __FUNCTION__))->type_common.precision)); |
| 1193 | woffset *= wi::to_offset (op->op2) * vn_ref_op_align_unit (op); |
| 1194 | woffset <<= LOG2_BITS_PER_UNIT3; |
| 1195 | offset += woffset; |
| 1196 | } |
| 1197 | break; |
| 1198 | |
| 1199 | case REALPART_EXPR: |
| 1200 | break; |
| 1201 | |
| 1202 | case IMAGPART_EXPR: |
| 1203 | offset += size; |
| 1204 | break; |
| 1205 | |
| 1206 | case VIEW_CONVERT_EXPR: |
| 1207 | break; |
| 1208 | |
| 1209 | case STRING_CST: |
| 1210 | case INTEGER_CST: |
| 1211 | case COMPLEX_CST: |
| 1212 | case VECTOR_CST: |
| 1213 | case REAL_CST: |
| 1214 | case CONSTRUCTOR: |
| 1215 | case CONST_DECL: |
| 1216 | return false; |
| 1217 | |
| 1218 | default: |
| 1219 | return false; |
| 1220 | } |
| 1221 | } |
| 1222 | |
| 1223 | if (base == NULL_TREE(tree) nullptr) |
| 1224 | return false; |
| 1225 | |
| 1226 | ref->ref = NULL_TREE(tree) nullptr; |
| 1227 | ref->base = base; |
| 1228 | ref->ref_alias_set = set; |
| 1229 | ref->base_alias_set = base_set; |
| 1230 | /* We discount volatiles from value-numbering elsewhere. */ |
| 1231 | ref->volatile_p = false; |
| 1232 | |
| 1233 | if (!size.to_shwi (&ref->size) || maybe_lt (ref->size, 0)) |
| 1234 | { |
| 1235 | ref->offset = 0; |
| 1236 | ref->size = -1; |
| 1237 | ref->max_size = -1; |
| 1238 | return true; |
| 1239 | } |
| 1240 | |
| 1241 | if (!offset.to_shwi (&ref->offset)) |
| 1242 | { |
| 1243 | ref->offset = 0; |
| 1244 | ref->max_size = -1; |
| 1245 | return true; |
| 1246 | } |
| 1247 | |
| 1248 | if (!max_size.to_shwi (&ref->max_size) || maybe_lt (ref->max_size, 0)) |
| 1249 | ref->max_size = -1; |
| 1250 | |
| 1251 | return true; |
| 1252 | } |
| 1253 | |
| 1254 | /* Copy the operations present in load/store/call REF into RESULT, a vector of |
| 1255 | vn_reference_op_s's. */ |
| 1256 | |
| 1257 | static void |
| 1258 | copy_reference_ops_from_call (gcall *call, |
| 1259 | vec<vn_reference_op_s> *result) |
| 1260 | { |
| 1261 | vn_reference_op_s temp; |
| 1262 | unsigned i; |
| 1263 | tree lhs = gimple_call_lhs (call); |
| 1264 | int lr; |
| 1265 | |
| 1266 | /* If 2 calls have a different non-ssa lhs, vdef value numbers should be |
| 1267 | different. By adding the lhs here in the vector, we ensure that the |
| 1268 | hashcode is different, guaranteeing a different value number. */ |
| 1269 | if (lhs && TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) != SSA_NAME) |
| 1270 | { |
| 1271 | memset (&temp, 0, sizeof (temp)); |
| 1272 | temp.opcode = MODIFY_EXPR; |
| 1273 | temp.type = TREE_TYPE (lhs)((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1273, __FUNCTION__))->typed.type); |
| 1274 | temp.op0 = lhs; |
| 1275 | temp.off = -1; |
| 1276 | result->safe_push (temp); |
| 1277 | } |
| 1278 | |
| 1279 | /* Copy the type, opcode, function, static chain and EH region, if any. */ |
| 1280 | memset (&temp, 0, sizeof (temp)); |
| 1281 | temp.type = gimple_call_fntype (call); |
| 1282 | temp.opcode = CALL_EXPR; |
| 1283 | temp.op0 = gimple_call_fn (call); |
| 1284 | if (gimple_call_internal_p (call)) |
| 1285 | temp.clique = gimple_call_internal_fn (call); |
| 1286 | temp.op1 = gimple_call_chain (call); |
| 1287 | if (stmt_could_throw_p (cfun(cfun + 0), call) && (lr = lookup_stmt_eh_lp (call)) > 0) |
| 1288 | temp.op2 = size_int (lr)size_int_kind (lr, stk_sizetype); |
| 1289 | temp.off = -1; |
| 1290 | result->safe_push (temp); |
| 1291 | |
| 1292 | /* Copy the call arguments. As they can be references as well, |
| 1293 | just chain them together. */ |
| 1294 | for (i = 0; i < gimple_call_num_args (call); ++i) |
| 1295 | { |
| 1296 | tree callarg = gimple_call_arg (call, i); |
| 1297 | copy_reference_ops_from_ref (callarg, result); |
| 1298 | } |
| 1299 | } |
| 1300 | |
| 1301 | /* Fold *& at position *I_P in a vn_reference_op_s vector *OPS. Updates |
| 1302 | *I_P to point to the last element of the replacement. */ |
| 1303 | static bool |
| 1304 | vn_reference_fold_indirect (vec<vn_reference_op_s> *ops, |
| 1305 | unsigned int *i_p) |
| 1306 | { |
| 1307 | unsigned int i = *i_p; |
| 1308 | vn_reference_op_t op = &(*ops)[i]; |
| 1309 | vn_reference_op_t mem_op = &(*ops)[i - 1]; |
| 1310 | tree addr_base; |
| 1311 | poly_int64 addr_offset = 0; |
| 1312 | |
| 1313 | /* The only thing we have to do is from &OBJ.foo.bar add the offset |
| 1314 | from .foo.bar to the preceding MEM_REF offset and replace the |
| 1315 | address with &OBJ. */ |
| 1316 | addr_base = get_addr_base_and_unit_offset_1 (TREE_OPERAND (op->op0, 0)(*((const_cast<tree*> (tree_operand_check ((op->op0) , (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1316, __FUNCTION__))))), |
| 1317 | &addr_offset, vn_valueize); |
| 1318 | gcc_checking_assert (addr_base && TREE_CODE (addr_base) != MEM_REF)((void)(!(addr_base && ((enum tree_code) (addr_base)-> base.code) != MEM_REF) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1318, __FUNCTION__), 0 : 0)); |
| 1319 | if (addr_base != TREE_OPERAND (op->op0, 0)(*((const_cast<tree*> (tree_operand_check ((op->op0) , (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1319, __FUNCTION__)))))) |
| 1320 | { |
| 1321 | poly_offset_int off |
| 1322 | = (poly_offset_int::from (wi::to_poly_wide (mem_op->op0), |
| 1323 | SIGNED) |
| 1324 | + addr_offset); |
| 1325 | mem_op->op0 = wide_int_to_tree (TREE_TYPE (mem_op->op0)((contains_struct_check ((mem_op->op0), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1325, __FUNCTION__))->typed.type), off); |
| 1326 | op->op0 = build_fold_addr_expr (addr_base)build_fold_addr_expr_loc (((location_t) 0), (addr_base)); |
| 1327 | if (tree_fits_shwi_p (mem_op->op0)) |
| 1328 | mem_op->off = tree_to_shwi (mem_op->op0); |
| 1329 | else |
| 1330 | mem_op->off = -1; |
| 1331 | return true; |
| 1332 | } |
| 1333 | return false; |
| 1334 | } |
| 1335 | |
| 1336 | /* Fold *& at position *I_P in a vn_reference_op_s vector *OPS. Updates |
| 1337 | *I_P to point to the last element of the replacement. */ |
| 1338 | static bool |
| 1339 | vn_reference_maybe_forwprop_address (vec<vn_reference_op_s> *ops, |
| 1340 | unsigned int *i_p) |
| 1341 | { |
| 1342 | bool changed = false; |
| 1343 | vn_reference_op_t op; |
| 1344 | |
| 1345 | do |
| 1346 | { |
| 1347 | unsigned int i = *i_p; |
| 1348 | op = &(*ops)[i]; |
| 1349 | vn_reference_op_t mem_op = &(*ops)[i - 1]; |
| 1350 | gimple *def_stmt; |
| 1351 | enum tree_code code; |
| 1352 | poly_offset_int off; |
| 1353 | |
| 1354 | def_stmt = SSA_NAME_DEF_STMT (op->op0)(tree_check ((op->op0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1354, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt; |
| 1355 | if (!is_gimple_assign (def_stmt)) |
| 1356 | return changed; |
| 1357 | |
| 1358 | code = gimple_assign_rhs_code (def_stmt); |
| 1359 | if (code != ADDR_EXPR |
| 1360 | && code != POINTER_PLUS_EXPR) |
| 1361 | return changed; |
| 1362 | |
| 1363 | off = poly_offset_int::from (wi::to_poly_wide (mem_op->op0), SIGNED); |
| 1364 | |
| 1365 | /* The only thing we have to do is from &OBJ.foo.bar add the offset |
| 1366 | from .foo.bar to the preceding MEM_REF offset and replace the |
| 1367 | address with &OBJ. */ |
| 1368 | if (code == ADDR_EXPR) |
| 1369 | { |
| 1370 | tree addr, addr_base; |
| 1371 | poly_int64 addr_offset; |
| 1372 | |
| 1373 | addr = gimple_assign_rhs1 (def_stmt); |
| 1374 | addr_base = get_addr_base_and_unit_offset_1 (TREE_OPERAND (addr, 0)(*((const_cast<tree*> (tree_operand_check ((addr), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1374, __FUNCTION__))))), |
| 1375 | &addr_offset, |
| 1376 | vn_valueize); |
| 1377 | /* If that didn't work because the address isn't invariant propagate |
| 1378 | the reference tree from the address operation in case the current |
| 1379 | dereference isn't offsetted. */ |
| 1380 | if (!addr_base |
| 1381 | && *i_p == ops->length () - 1 |
| 1382 | && known_eq (off, 0)(!maybe_ne (off, 0)) |
| 1383 | /* This makes us disable this transform for PRE where the |
| 1384 | reference ops might be also used for code insertion which |
| 1385 | is invalid. */ |
| 1386 | && default_vn_walk_kind == VN_WALKREWRITE) |
| 1387 | { |
| 1388 | auto_vec<vn_reference_op_s, 32> tem; |
| 1389 | copy_reference_ops_from_ref (TREE_OPERAND (addr, 0)(*((const_cast<tree*> (tree_operand_check ((addr), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1389, __FUNCTION__))))), &tem); |
| 1390 | /* Make sure to preserve TBAA info. The only objects not |
| 1391 | wrapped in MEM_REFs that can have their address taken are |
| 1392 | STRING_CSTs. */ |
| 1393 | if (tem.length () >= 2 |
| 1394 | && tem[tem.length () - 2].opcode == MEM_REF) |
| 1395 | { |
| 1396 | vn_reference_op_t new_mem_op = &tem[tem.length () - 2]; |
| 1397 | new_mem_op->op0 |
| 1398 | = wide_int_to_tree (TREE_TYPE (mem_op->op0)((contains_struct_check ((mem_op->op0), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1398, __FUNCTION__))->typed.type), |
| 1399 | wi::to_poly_wide (new_mem_op->op0)); |
| 1400 | } |
| 1401 | else |
| 1402 | gcc_assert (tem.last ().opcode == STRING_CST)((void)(!(tem.last ().opcode == STRING_CST) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1402, __FUNCTION__), 0 : 0)); |
| 1403 | ops->pop (); |
| 1404 | ops->pop (); |
| 1405 | ops->safe_splice (tem); |
| 1406 | --*i_p; |
| 1407 | return true; |
| 1408 | } |
| 1409 | if (!addr_base |
| 1410 | || TREE_CODE (addr_base)((enum tree_code) (addr_base)->base.code) != MEM_REF |
| 1411 | || (TREE_CODE (TREE_OPERAND (addr_base, 0))((enum tree_code) ((*((const_cast<tree*> (tree_operand_check ((addr_base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1411, __FUNCTION__))))))->base.code) == SSA_NAME |
| 1412 | && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (TREE_OPERAND (addr_base,(tree_check (((*((const_cast<tree*> (tree_operand_check ((addr_base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1413, __FUNCTION__)))))), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1413, __FUNCTION__, (SSA_NAME)))->base.asm_written_flag |
| 1413 | 0))(tree_check (((*((const_cast<tree*> (tree_operand_check ((addr_base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1413, __FUNCTION__)))))), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1413, __FUNCTION__, (SSA_NAME)))->base.asm_written_flag)) |
| 1414 | return changed; |
| 1415 | |
| 1416 | off += addr_offset; |
| 1417 | off += mem_ref_offset (addr_base); |
| 1418 | op->op0 = TREE_OPERAND (addr_base, 0)(*((const_cast<tree*> (tree_operand_check ((addr_base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1418, __FUNCTION__))))); |
| 1419 | } |
| 1420 | else |
| 1421 | { |
| 1422 | tree ptr, ptroff; |
| 1423 | ptr = gimple_assign_rhs1 (def_stmt); |
| 1424 | ptroff = gimple_assign_rhs2 (def_stmt); |
| 1425 | if (TREE_CODE (ptr)((enum tree_code) (ptr)->base.code) != SSA_NAME |
| 1426 | || SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ptr)(tree_check ((ptr), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1426, __FUNCTION__, (SSA_NAME)))->base.asm_written_flag |
| 1427 | /* Make sure to not endlessly recurse. |
| 1428 | See gcc.dg/tree-ssa/20040408-1.c for an example. Can easily |
| 1429 | happen when we value-number a PHI to its backedge value. */ |
| 1430 | || SSA_VAL (ptr) == op->op0 |
| 1431 | || !poly_int_tree_p (ptroff)) |
| 1432 | return changed; |
| 1433 | |
| 1434 | off += wi::to_poly_offset (ptroff); |
| 1435 | op->op0 = ptr; |
| 1436 | } |
| 1437 | |
| 1438 | mem_op->op0 = wide_int_to_tree (TREE_TYPE (mem_op->op0)((contains_struct_check ((mem_op->op0), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1438, __FUNCTION__))->typed.type), off); |
| 1439 | if (tree_fits_shwi_p (mem_op->op0)) |
| 1440 | mem_op->off = tree_to_shwi (mem_op->op0); |
| 1441 | else |
| 1442 | mem_op->off = -1; |
| 1443 | /* ??? Can end up with endless recursion here!? |
| 1444 | gcc.c-torture/execute/strcmp-1.c */ |
| 1445 | if (TREE_CODE (op->op0)((enum tree_code) (op->op0)->base.code) == SSA_NAME) |
| 1446 | op->op0 = SSA_VAL (op->op0); |
| 1447 | if (TREE_CODE (op->op0)((enum tree_code) (op->op0)->base.code) != SSA_NAME) |
| 1448 | op->opcode = TREE_CODE (op->op0)((enum tree_code) (op->op0)->base.code); |
| 1449 | |
| 1450 | changed = true; |
| 1451 | } |
| 1452 | /* Tail-recurse. */ |
| 1453 | while (TREE_CODE (op->op0)((enum tree_code) (op->op0)->base.code) == SSA_NAME); |
| 1454 | |
| 1455 | /* Fold a remaining *&. */ |
| 1456 | if (TREE_CODE (op->op0)((enum tree_code) (op->op0)->base.code) == ADDR_EXPR) |
| 1457 | vn_reference_fold_indirect (ops, i_p); |
| 1458 | |
| 1459 | return changed; |
| 1460 | } |
| 1461 | |
| 1462 | /* Optimize the reference REF to a constant if possible or return |
| 1463 | NULL_TREE if not. */ |
| 1464 | |
| 1465 | tree |
| 1466 | fully_constant_vn_reference_p (vn_reference_t ref) |
| 1467 | { |
| 1468 | vec<vn_reference_op_s> operands = ref->operands; |
| 1469 | vn_reference_op_t op; |
| 1470 | |
| 1471 | /* Try to simplify the translated expression if it is |
| 1472 | a call to a builtin function with at most two arguments. */ |
| 1473 | op = &operands[0]; |
| 1474 | if (op->opcode == CALL_EXPR |
| 1475 | && (!op->op0 |
| 1476 | || (TREE_CODE (op->op0)((enum tree_code) (op->op0)->base.code) == ADDR_EXPR |
| 1477 | && TREE_CODE (TREE_OPERAND (op->op0, 0))((enum tree_code) ((*((const_cast<tree*> (tree_operand_check ((op->op0), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1477, __FUNCTION__))))))->base.code) == FUNCTION_DECL |
| 1478 | && fndecl_built_in_p (TREE_OPERAND (op->op0, 0)(*((const_cast<tree*> (tree_operand_check ((op->op0) , (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1478, __FUNCTION__))))), |
| 1479 | BUILT_IN_NORMAL))) |
| 1480 | && operands.length () >= 2 |
| 1481 | && operands.length () <= 3) |
| 1482 | { |
| 1483 | vn_reference_op_t arg0, arg1 = NULLnullptr; |
| 1484 | bool anyconst = false; |
| 1485 | arg0 = &operands[1]; |
| 1486 | if (operands.length () > 2) |
| 1487 | arg1 = &operands[2]; |
| 1488 | if (TREE_CODE_CLASS (arg0->opcode)tree_code_type_tmpl <0>::tree_code_type[(int) (arg0-> opcode)] == tcc_constant |
| 1489 | || (arg0->opcode == ADDR_EXPR |
| 1490 | && is_gimple_min_invariant (arg0->op0))) |
| 1491 | anyconst = true; |
| 1492 | if (arg1 |
| 1493 | && (TREE_CODE_CLASS (arg1->opcode)tree_code_type_tmpl <0>::tree_code_type[(int) (arg1-> opcode)] == tcc_constant |
| 1494 | || (arg1->opcode == ADDR_EXPR |
| 1495 | && is_gimple_min_invariant (arg1->op0)))) |
| 1496 | anyconst = true; |
| 1497 | if (anyconst) |
| 1498 | { |
| 1499 | combined_fn fn; |
| 1500 | if (op->op0) |
| 1501 | fn = as_combined_fn (DECL_FUNCTION_CODE |
| 1502 | (TREE_OPERAND (op->op0, 0)(*((const_cast<tree*> (tree_operand_check ((op->op0) , (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1502, __FUNCTION__))))))); |
| 1503 | else |
| 1504 | fn = as_combined_fn ((internal_fn) op->clique); |
| 1505 | tree folded; |
| 1506 | if (arg1) |
| 1507 | folded = fold_const_call (fn, ref->type, arg0->op0, arg1->op0); |
| 1508 | else |
| 1509 | folded = fold_const_call (fn, ref->type, arg0->op0); |
| 1510 | if (folded |
| 1511 | && is_gimple_min_invariant (folded)) |
| 1512 | return folded; |
| 1513 | } |
| 1514 | } |
| 1515 | |
| 1516 | /* Simplify reads from constants or constant initializers. */ |
| 1517 | else if (BITS_PER_UNIT(8) == 8 |
| 1518 | && ref->type |
| 1519 | && COMPLETE_TYPE_P (ref->type)(((tree_class_check ((ref->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1519, __FUNCTION__))->type_common.size) != (tree) nullptr ) |
| 1520 | && is_gimple_reg_type (ref->type)) |
| 1521 | { |
| 1522 | poly_int64 off = 0; |
| 1523 | HOST_WIDE_INTlong size; |
| 1524 | if (INTEGRAL_TYPE_P (ref->type)(((enum tree_code) (ref->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (ref->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (ref->type)->base.code) == INTEGER_TYPE )) |
| 1525 | size = TYPE_PRECISION (ref->type)((tree_class_check ((ref->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1525, __FUNCTION__))->type_common.precision); |
| 1526 | else if (tree_fits_shwi_p (TYPE_SIZE (ref->type)((tree_class_check ((ref->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1526, __FUNCTION__))->type_common.size))) |
| 1527 | size = tree_to_shwi (TYPE_SIZE (ref->type)((tree_class_check ((ref->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1527, __FUNCTION__))->type_common.size)); |
| 1528 | else |
| 1529 | return NULL_TREE(tree) nullptr; |
| 1530 | if (size % BITS_PER_UNIT(8) != 0 |
| 1531 | || size > MAX_BITSIZE_MODE_ANY_MODE(256*(8))) |
| 1532 | return NULL_TREE(tree) nullptr; |
| 1533 | size /= BITS_PER_UNIT(8); |
| 1534 | unsigned i; |
| 1535 | for (i = 0; i < operands.length (); ++i) |
| 1536 | { |
| 1537 | if (TREE_CODE_CLASS (operands[i].opcode)tree_code_type_tmpl <0>::tree_code_type[(int) (operands [i].opcode)] == tcc_constant) |
| 1538 | { |
| 1539 | ++i; |
| 1540 | break; |
| 1541 | } |
| 1542 | if (known_eq (operands[i].off, -1)(!maybe_ne (operands[i].off, -1))) |
| 1543 | return NULL_TREE(tree) nullptr; |
| 1544 | off += operands[i].off; |
| 1545 | if (operands[i].opcode == MEM_REF) |
| 1546 | { |
| 1547 | ++i; |
| 1548 | break; |
| 1549 | } |
| 1550 | } |
| 1551 | vn_reference_op_t base = &operands[--i]; |
| 1552 | tree ctor = error_mark_nodeglobal_trees[TI_ERROR_MARK]; |
| 1553 | tree decl = NULL_TREE(tree) nullptr; |
| 1554 | if (TREE_CODE_CLASS (base->opcode)tree_code_type_tmpl <0>::tree_code_type[(int) (base-> opcode)] == tcc_constant) |
| 1555 | ctor = base->op0; |
| 1556 | else if (base->opcode == MEM_REF |
| 1557 | && base[1].opcode == ADDR_EXPR |
| 1558 | && (TREE_CODE (TREE_OPERAND (base[1].op0, 0))((enum tree_code) ((*((const_cast<tree*> (tree_operand_check ((base[1].op0), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1558, __FUNCTION__))))))->base.code) == VAR_DECL |
| 1559 | || TREE_CODE (TREE_OPERAND (base[1].op0, 0))((enum tree_code) ((*((const_cast<tree*> (tree_operand_check ((base[1].op0), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1559, __FUNCTION__))))))->base.code) == CONST_DECL |
| 1560 | || TREE_CODE (TREE_OPERAND (base[1].op0, 0))((enum tree_code) ((*((const_cast<tree*> (tree_operand_check ((base[1].op0), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1560, __FUNCTION__))))))->base.code) == STRING_CST)) |
| 1561 | { |
| 1562 | decl = TREE_OPERAND (base[1].op0, 0)(*((const_cast<tree*> (tree_operand_check ((base[1].op0 ), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1562, __FUNCTION__))))); |
| 1563 | if (TREE_CODE (decl)((enum tree_code) (decl)->base.code) == STRING_CST) |
| 1564 | ctor = decl; |
| 1565 | else |
| 1566 | ctor = ctor_for_folding (decl); |
| 1567 | } |
| 1568 | if (ctor == NULL_TREE(tree) nullptr) |
| 1569 | return build_zero_cst (ref->type); |
| 1570 | else if (ctor != error_mark_nodeglobal_trees[TI_ERROR_MARK]) |
| 1571 | { |
| 1572 | HOST_WIDE_INTlong const_off; |
| 1573 | if (decl) |
| 1574 | { |
| 1575 | tree res = fold_ctor_reference (ref->type, ctor, |
| 1576 | off * BITS_PER_UNIT(8), |
| 1577 | size * BITS_PER_UNIT(8), decl); |
| 1578 | if (res) |
| 1579 | { |
| 1580 | STRIP_USELESS_TYPE_CONVERSION (res)(res) = tree_ssa_strip_useless_type_conversions (res); |
| 1581 | if (is_gimple_min_invariant (res)) |
| 1582 | return res; |
| 1583 | } |
| 1584 | } |
| 1585 | else if (off.is_constant (&const_off)) |
| 1586 | { |
| 1587 | unsigned char buf[MAX_BITSIZE_MODE_ANY_MODE(256*(8)) / BITS_PER_UNIT(8)]; |
| 1588 | int len = native_encode_expr (ctor, buf, size, const_off); |
| 1589 | if (len > 0) |
| 1590 | return native_interpret_expr (ref->type, buf, len); |
| 1591 | } |
| 1592 | } |
| 1593 | } |
| 1594 | |
| 1595 | return NULL_TREE(tree) nullptr; |
| 1596 | } |
| 1597 | |
| 1598 | /* Return true if OPS contain a storage order barrier. */ |
| 1599 | |
| 1600 | static bool |
| 1601 | contains_storage_order_barrier_p (vec<vn_reference_op_s> ops) |
| 1602 | { |
| 1603 | vn_reference_op_t op; |
| 1604 | unsigned i; |
| 1605 | |
| 1606 | FOR_EACH_VEC_ELT (ops, i, op)for (i = 0; (ops).iterate ((i), &(op)); ++(i)) |
| 1607 | if (op->opcode == VIEW_CONVERT_EXPR && op->reverse) |
| 1608 | return true; |
| 1609 | |
| 1610 | return false; |
| 1611 | } |
| 1612 | |
| 1613 | /* Return true if OPS represent an access with reverse storage order. */ |
| 1614 | |
| 1615 | static bool |
| 1616 | reverse_storage_order_for_component_p (vec<vn_reference_op_s> ops) |
| 1617 | { |
| 1618 | unsigned i = 0; |
| 1619 | if (ops[i].opcode == REALPART_EXPR || ops[i].opcode == IMAGPART_EXPR) |
| 1620 | ++i; |
| 1621 | switch (ops[i].opcode) |
| 1622 | { |
| 1623 | case ARRAY_REF: |
| 1624 | case COMPONENT_REF: |
| 1625 | case BIT_FIELD_REF: |
| 1626 | case MEM_REF: |
| 1627 | return ops[i].reverse; |
| 1628 | default: |
| 1629 | return false; |
| 1630 | } |
| 1631 | } |
| 1632 | |
| 1633 | /* Transform any SSA_NAME's in a vector of vn_reference_op_s |
| 1634 | structures into their value numbers. This is done in-place, and |
| 1635 | the vector passed in is returned. *VALUEIZED_ANYTHING will specify |
| 1636 | whether any operands were valueized. */ |
| 1637 | |
| 1638 | static void |
| 1639 | valueize_refs_1 (vec<vn_reference_op_s> *orig, bool *valueized_anything, |
| 1640 | bool with_avail = false) |
| 1641 | { |
| 1642 | *valueized_anything = false; |
| 1643 | |
| 1644 | for (unsigned i = 0; i < orig->length (); ++i) |
| 1645 | { |
| 1646 | re_valueize: |
| 1647 | vn_reference_op_t vro = &(*orig)[i]; |
| 1648 | if (vro->opcode == SSA_NAME |
| 1649 | || (vro->op0 && TREE_CODE (vro->op0)((enum tree_code) (vro->op0)->base.code) == SSA_NAME)) |
| 1650 | { |
| 1651 | tree tem = with_avail ? vn_valueize (vro->op0) : SSA_VAL (vro->op0); |
| 1652 | if (tem != vro->op0) |
| 1653 | { |
| 1654 | *valueized_anything = true; |
| 1655 | vro->op0 = tem; |
| 1656 | } |
| 1657 | /* If it transforms from an SSA_NAME to a constant, update |
| 1658 | the opcode. */ |
| 1659 | if (TREE_CODE (vro->op0)((enum tree_code) (vro->op0)->base.code) != SSA_NAME && vro->opcode == SSA_NAME) |
| 1660 | vro->opcode = TREE_CODE (vro->op0)((enum tree_code) (vro->op0)->base.code); |
| 1661 | } |
| 1662 | if (vro->op1 && TREE_CODE (vro->op1)((enum tree_code) (vro->op1)->base.code) == SSA_NAME) |
| 1663 | { |
| 1664 | tree tem = with_avail ? vn_valueize (vro->op1) : SSA_VAL (vro->op1); |
| 1665 | if (tem != vro->op1) |
| 1666 | { |
| 1667 | *valueized_anything = true; |
| 1668 | vro->op1 = tem; |
| 1669 | } |
| 1670 | } |
| 1671 | if (vro->op2 && TREE_CODE (vro->op2)((enum tree_code) (vro->op2)->base.code) == SSA_NAME) |
| 1672 | { |
| 1673 | tree tem = with_avail ? vn_valueize (vro->op2) : SSA_VAL (vro->op2); |
| 1674 | if (tem != vro->op2) |
| 1675 | { |
| 1676 | *valueized_anything = true; |
| 1677 | vro->op2 = tem; |
| 1678 | } |
| 1679 | } |
| 1680 | /* If it transforms from an SSA_NAME to an address, fold with |
| 1681 | a preceding indirect reference. */ |
| 1682 | if (i > 0 |
| 1683 | && vro->op0 |
| 1684 | && TREE_CODE (vro->op0)((enum tree_code) (vro->op0)->base.code) == ADDR_EXPR |
| 1685 | && (*orig)[i - 1].opcode == MEM_REF) |
| 1686 | { |
| 1687 | if (vn_reference_fold_indirect (orig, &i)) |
| 1688 | *valueized_anything = true; |
| 1689 | } |
| 1690 | else if (i > 0 |
| 1691 | && vro->opcode == SSA_NAME |
| 1692 | && (*orig)[i - 1].opcode == MEM_REF) |
| 1693 | { |
| 1694 | if (vn_reference_maybe_forwprop_address (orig, &i)) |
| 1695 | { |
| 1696 | *valueized_anything = true; |
| 1697 | /* Re-valueize the current operand. */ |
| 1698 | goto re_valueize; |
| 1699 | } |
| 1700 | } |
| 1701 | /* If it transforms a non-constant ARRAY_REF into a constant |
| 1702 | one, adjust the constant offset. */ |
| 1703 | else if (vro->opcode == ARRAY_REF |
| 1704 | && known_eq (vro->off, -1)(!maybe_ne (vro->off, -1)) |
| 1705 | && poly_int_tree_p (vro->op0) |
| 1706 | && poly_int_tree_p (vro->op1) |
| 1707 | && TREE_CODE (vro->op2)((enum tree_code) (vro->op2)->base.code) == INTEGER_CST) |
| 1708 | { |
| 1709 | poly_offset_int off = ((wi::to_poly_offset (vro->op0) |
| 1710 | - wi::to_poly_offset (vro->op1)) |
| 1711 | * wi::to_offset (vro->op2) |
| 1712 | * vn_ref_op_align_unit (vro)); |
| 1713 | off.to_shwi (&vro->off); |
| 1714 | } |
| 1715 | } |
| 1716 | } |
| 1717 | |
| 1718 | static void |
| 1719 | valueize_refs (vec<vn_reference_op_s> *orig) |
| 1720 | { |
| 1721 | bool tem; |
| 1722 | valueize_refs_1 (orig, &tem); |
| 1723 | } |
| 1724 | |
| 1725 | static vec<vn_reference_op_s> shared_lookup_references; |
| 1726 | |
| 1727 | /* Create a vector of vn_reference_op_s structures from REF, a |
| 1728 | REFERENCE_CLASS_P tree. The vector is shared among all callers of |
| 1729 | this function. *VALUEIZED_ANYTHING will specify whether any |
| 1730 | operands were valueized. */ |
| 1731 | |
| 1732 | static vec<vn_reference_op_s> |
| 1733 | valueize_shared_reference_ops_from_ref (tree ref, bool *valueized_anything) |
| 1734 | { |
| 1735 | if (!ref) |
| 1736 | return vNULL; |
| 1737 | shared_lookup_references.truncate (0); |
| 1738 | copy_reference_ops_from_ref (ref, &shared_lookup_references); |
| 1739 | valueize_refs_1 (&shared_lookup_references, valueized_anything); |
| 1740 | return shared_lookup_references; |
| 1741 | } |
| 1742 | |
| 1743 | /* Create a vector of vn_reference_op_s structures from CALL, a |
| 1744 | call statement. The vector is shared among all callers of |
| 1745 | this function. */ |
| 1746 | |
| 1747 | static vec<vn_reference_op_s> |
| 1748 | valueize_shared_reference_ops_from_call (gcall *call) |
| 1749 | { |
| 1750 | if (!call) |
| 1751 | return vNULL; |
| 1752 | shared_lookup_references.truncate (0); |
| 1753 | copy_reference_ops_from_call (call, &shared_lookup_references); |
| 1754 | valueize_refs (&shared_lookup_references); |
| 1755 | return shared_lookup_references; |
| 1756 | } |
| 1757 | |
| 1758 | /* Lookup a SCCVN reference operation VR in the current hash table. |
| 1759 | Returns the resulting value number if it exists in the hash table, |
| 1760 | NULL_TREE otherwise. VNRESULT will be filled in with the actual |
| 1761 | vn_reference_t stored in the hashtable if something is found. */ |
| 1762 | |
| 1763 | static tree |
| 1764 | vn_reference_lookup_1 (vn_reference_t vr, vn_reference_t *vnresult) |
| 1765 | { |
| 1766 | vn_reference_s **slot; |
| 1767 | hashval_t hash; |
| 1768 | |
| 1769 | hash = vr->hashcode; |
| 1770 | slot = valid_info->references->find_slot_with_hash (vr, hash, NO_INSERT); |
| 1771 | if (slot) |
| 1772 | { |
| 1773 | if (vnresult) |
| 1774 | *vnresult = (vn_reference_t)*slot; |
| 1775 | return ((vn_reference_t)*slot)->result; |
| 1776 | } |
| 1777 | |
| 1778 | return NULL_TREE(tree) nullptr; |
| 1779 | } |
| 1780 | |
| 1781 | |
| 1782 | /* Partial definition tracking support. */ |
| 1783 | |
| 1784 | struct pd_range |
| 1785 | { |
| 1786 | HOST_WIDE_INTlong offset; |
| 1787 | HOST_WIDE_INTlong size; |
| 1788 | }; |
| 1789 | |
| 1790 | struct pd_data |
| 1791 | { |
| 1792 | tree rhs; |
| 1793 | HOST_WIDE_INTlong rhs_off; |
| 1794 | HOST_WIDE_INTlong offset; |
| 1795 | HOST_WIDE_INTlong size; |
| 1796 | }; |
| 1797 | |
| 1798 | /* Context for alias walking. */ |
| 1799 | |
| 1800 | struct vn_walk_cb_data |
| 1801 | { |
| 1802 | vn_walk_cb_data (vn_reference_t vr_, tree orig_ref_, tree *last_vuse_ptr_, |
| 1803 | vn_lookup_kind vn_walk_kind_, bool tbaa_p_, tree mask_, |
| 1804 | bool redundant_store_removal_p_) |
| 1805 | : vr (vr_), last_vuse_ptr (last_vuse_ptr_), last_vuse (NULL_TREE(tree) nullptr), |
| 1806 | mask (mask_), masked_result (NULL_TREE(tree) nullptr), same_val (NULL_TREE(tree) nullptr), |
| 1807 | vn_walk_kind (vn_walk_kind_), |
| 1808 | tbaa_p (tbaa_p_), redundant_store_removal_p (redundant_store_removal_p_), |
| 1809 | saved_operands (vNULL), first_set (-2), first_base_set (-2), |
| 1810 | known_ranges (NULLnullptr) |
| 1811 | { |
| 1812 | if (!last_vuse_ptr) |
| 1813 | last_vuse_ptr = &last_vuse; |
| 1814 | ao_ref_init (&orig_ref, orig_ref_); |
| 1815 | if (mask) |
| 1816 | { |
| 1817 | wide_int w = wi::to_wide (mask); |
| 1818 | unsigned int pos = 0, prec = w.get_precision (); |
| 1819 | pd_data pd; |
| 1820 | pd.rhs = build_constructor (NULL_TREE(tree) nullptr, NULLnullptr); |
| 1821 | pd.rhs_off = 0; |
| 1822 | /* When bitwise and with a constant is done on a memory load, |
| 1823 | we don't really need all the bits to be defined or defined |
| 1824 | to constants, we don't really care what is in the position |
| 1825 | corresponding to 0 bits in the mask. |
| 1826 | So, push the ranges of those 0 bits in the mask as artificial |
| 1827 | zero stores and let the partial def handling code do the |
| 1828 | rest. */ |
| 1829 | while (pos < prec) |
| 1830 | { |
| 1831 | int tz = wi::ctz (w); |
| 1832 | if (pos + tz > prec) |
| 1833 | tz = prec - pos; |
| 1834 | if (tz) |
| 1835 | { |
| 1836 | if (BYTES_BIG_ENDIAN0) |
| 1837 | pd.offset = prec - pos - tz; |
| 1838 | else |
| 1839 | pd.offset = pos; |
| 1840 | pd.size = tz; |
| 1841 | void *r = push_partial_def (pd, 0, 0, 0, prec); |
| 1842 | gcc_assert (r == NULL_TREE)((void)(!(r == (tree) nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1842, __FUNCTION__), 0 : 0)); |
| 1843 | } |
| 1844 | pos += tz; |
| 1845 | if (pos == prec) |
| 1846 | break; |
| 1847 | w = wi::lrshift (w, tz); |
| 1848 | tz = wi::ctz (wi::bit_not (w)); |
| 1849 | if (pos + tz > prec) |
| 1850 | tz = prec - pos; |
| 1851 | pos += tz; |
| 1852 | w = wi::lrshift (w, tz); |
| 1853 | } |
| 1854 | } |
| 1855 | } |
| 1856 | ~vn_walk_cb_data (); |
| 1857 | void *finish (alias_set_type, alias_set_type, tree); |
| 1858 | void *push_partial_def (pd_data pd, |
| 1859 | alias_set_type, alias_set_type, HOST_WIDE_INTlong, |
| 1860 | HOST_WIDE_INTlong); |
| 1861 | |
| 1862 | vn_reference_t vr; |
| 1863 | ao_ref orig_ref; |
| 1864 | tree *last_vuse_ptr; |
| 1865 | tree last_vuse; |
| 1866 | tree mask; |
| 1867 | tree masked_result; |
| 1868 | tree same_val; |
| 1869 | vn_lookup_kind vn_walk_kind; |
| 1870 | bool tbaa_p; |
| 1871 | bool redundant_store_removal_p; |
| 1872 | vec<vn_reference_op_s> saved_operands; |
| 1873 | |
| 1874 | /* The VDEFs of partial defs we come along. */ |
| 1875 | auto_vec<pd_data, 2> partial_defs; |
| 1876 | /* The first defs range to avoid splay tree setup in most cases. */ |
| 1877 | pd_range first_range; |
| 1878 | alias_set_type first_set; |
| 1879 | alias_set_type first_base_set; |
| 1880 | splay_tree known_ranges; |
| 1881 | obstack ranges_obstack; |
| 1882 | }; |
| 1883 | |
| 1884 | vn_walk_cb_data::~vn_walk_cb_data () |
| 1885 | { |
| 1886 | if (known_ranges) |
| 1887 | { |
| 1888 | splay_tree_delete (known_ranges); |
| 1889 | obstack_free (&ranges_obstack, NULL)__extension__ ({ struct obstack *__o = (&ranges_obstack); void *__obj = (void *) (nullptr); if (__obj > (void *) __o ->chunk && __obj < (void *) __o->chunk_limit ) __o->next_free = __o->object_base = (char *) __obj; else _obstack_free (__o, __obj); }); |
| 1890 | } |
| 1891 | saved_operands.release (); |
| 1892 | } |
| 1893 | |
| 1894 | void * |
| 1895 | vn_walk_cb_data::finish (alias_set_type set, alias_set_type base_set, tree val) |
| 1896 | { |
| 1897 | if (first_set != -2) |
| 1898 | { |
| 1899 | set = first_set; |
| 1900 | base_set = first_base_set; |
| 1901 | } |
| 1902 | if (mask) |
| 1903 | { |
| 1904 | masked_result = val; |
| 1905 | return (void *) -1; |
| 1906 | } |
| 1907 | if (same_val && !operand_equal_p (val, same_val)) |
| 1908 | return (void *) -1; |
| 1909 | vec<vn_reference_op_s> &operands |
| 1910 | = saved_operands.exists () ? saved_operands : vr->operands; |
| 1911 | return vn_reference_lookup_or_insert_for_pieces (last_vuse, set, base_set, |
| 1912 | vr->type, operands, val); |
| 1913 | } |
| 1914 | |
| 1915 | /* pd_range splay-tree helpers. */ |
| 1916 | |
| 1917 | static int |
| 1918 | pd_range_compare (splay_tree_key offset1p, splay_tree_key offset2p) |
| 1919 | { |
| 1920 | HOST_WIDE_INTlong offset1 = *(HOST_WIDE_INTlong *)offset1p; |
| 1921 | HOST_WIDE_INTlong offset2 = *(HOST_WIDE_INTlong *)offset2p; |
| 1922 | if (offset1 < offset2) |
| 1923 | return -1; |
| 1924 | else if (offset1 > offset2) |
| 1925 | return 1; |
| 1926 | return 0; |
| 1927 | } |
| 1928 | |
| 1929 | static void * |
| 1930 | pd_tree_alloc (int size, void *data_) |
| 1931 | { |
| 1932 | vn_walk_cb_data *data = (vn_walk_cb_data *)data_; |
| 1933 | return obstack_alloc (&data->ranges_obstack, size)__extension__ ({ struct obstack *__h = (&data->ranges_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((size)); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o )->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1->object_base ; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); }); |
| 1934 | } |
| 1935 | |
| 1936 | static void |
| 1937 | pd_tree_dealloc (void *, void *) |
| 1938 | { |
| 1939 | } |
| 1940 | |
| 1941 | /* Push PD to the vector of partial definitions returning a |
| 1942 | value when we are ready to combine things with VUSE, SET and MAXSIZEI, |
| 1943 | NULL when we want to continue looking for partial defs or -1 |
| 1944 | on failure. */ |
| 1945 | |
| 1946 | void * |
| 1947 | vn_walk_cb_data::push_partial_def (pd_data pd, |
| 1948 | alias_set_type set, alias_set_type base_set, |
| 1949 | HOST_WIDE_INTlong offseti, |
| 1950 | HOST_WIDE_INTlong maxsizei) |
| 1951 | { |
| 1952 | const HOST_WIDE_INTlong bufsize = 64; |
| 1953 | /* We're using a fixed buffer for encoding so fail early if the object |
| 1954 | we want to interpret is bigger. */ |
| 1955 | if (maxsizei > bufsize * BITS_PER_UNIT(8) |
| 1956 | || CHAR_BIT8 != 8 |
| 1957 | || BITS_PER_UNIT(8) != 8 |
| 1958 | /* Not prepared to handle PDP endian. */ |
| 1959 | || BYTES_BIG_ENDIAN0 != WORDS_BIG_ENDIAN0) |
| 1960 | return (void *)-1; |
| 1961 | |
| 1962 | /* Turn too large constant stores into non-constant stores. */ |
| 1963 | if (CONSTANT_CLASS_P (pd.rhs)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (pd.rhs)->base.code))] == tcc_constant) && pd.size > bufsize * BITS_PER_UNIT(8)) |
| 1964 | pd.rhs = error_mark_nodeglobal_trees[TI_ERROR_MARK]; |
| 1965 | |
| 1966 | /* And for non-constant or CONSTRUCTOR stores shrink them to only keep at |
| 1967 | most a partial byte before and/or after the region. */ |
| 1968 | if (!CONSTANT_CLASS_P (pd.rhs)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (pd.rhs)->base.code))] == tcc_constant)) |
| 1969 | { |
| 1970 | if (pd.offset < offseti) |
| 1971 | { |
| 1972 | HOST_WIDE_INTlong o = ROUND_DOWN (offseti - pd.offset, BITS_PER_UNIT)((offseti - pd.offset) & ~(((8)) - 1)); |
| 1973 | gcc_assert (pd.size > o)((void)(!(pd.size > o) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 1973, __FUNCTION__), 0 : 0)); |
| 1974 | pd.size -= o; |
| 1975 | pd.offset += o; |
| 1976 | } |
| 1977 | if (pd.size > maxsizei) |
| 1978 | pd.size = maxsizei + ((pd.size - maxsizei) % BITS_PER_UNIT(8)); |
| 1979 | } |
| 1980 | |
| 1981 | pd.offset -= offseti; |
| 1982 | |
| 1983 | bool pd_constant_p = (TREE_CODE (pd.rhs)((enum tree_code) (pd.rhs)->base.code) == CONSTRUCTOR |
| 1984 | || CONSTANT_CLASS_P (pd.rhs)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (pd.rhs)->base.code))] == tcc_constant)); |
| 1985 | pd_range *r; |
| 1986 | if (partial_defs.is_empty ()) |
| 1987 | { |
| 1988 | /* If we get a clobber upfront, fail. */ |
| 1989 | if (TREE_CLOBBER_P (pd.rhs)(((enum tree_code) (pd.rhs)->base.code) == CONSTRUCTOR && ((pd.rhs)->base.volatile_flag))) |
| 1990 | return (void *)-1; |
| 1991 | if (!pd_constant_p) |
| 1992 | return (void *)-1; |
| 1993 | partial_defs.safe_push (pd); |
| 1994 | first_range.offset = pd.offset; |
| 1995 | first_range.size = pd.size; |
| 1996 | first_set = set; |
| 1997 | first_base_set = base_set; |
| 1998 | last_vuse_ptr = NULLnullptr; |
| 1999 | r = &first_range; |
| 2000 | /* Go check if the first partial definition was a full one in case |
| 2001 | the caller didn't optimize for this. */ |
| 2002 | } |
| 2003 | else |
| 2004 | { |
| 2005 | if (!known_ranges) |
| 2006 | { |
| 2007 | /* ??? Optimize the case where the 2nd partial def completes |
| 2008 | things. */ |
| 2009 | gcc_obstack_init (&ranges_obstack)_obstack_begin (((&ranges_obstack)), (memory_block_pool:: block_size), (0), (mempool_obstack_chunk_alloc), (mempool_obstack_chunk_free )); |
| 2010 | known_ranges = splay_tree_new_with_allocator (pd_range_compare, 0, 0, |
| 2011 | pd_tree_alloc, |
| 2012 | pd_tree_dealloc, this); |
| 2013 | splay_tree_insert (known_ranges, |
| 2014 | (splay_tree_key)&first_range.offset, |
| 2015 | (splay_tree_value)&first_range); |
| 2016 | } |
| 2017 | |
| 2018 | pd_range newr = { pd.offset, pd.size }; |
| 2019 | splay_tree_node n; |
| 2020 | /* Lookup the predecessor of offset + 1 and see if we need to merge. */ |
| 2021 | HOST_WIDE_INTlong loffset = newr.offset + 1; |
| 2022 | if ((n = splay_tree_predecessor (known_ranges, (splay_tree_key)&loffset)) |
| 2023 | && ((r = (pd_range *)n->value), true) |
| 2024 | && ranges_known_overlap_p (r->offset, r->size + 1, |
| 2025 | newr.offset, newr.size)) |
| 2026 | { |
| 2027 | /* Ignore partial defs already covered. Here we also drop shadowed |
| 2028 | clobbers arriving here at the floor. */ |
| 2029 | if (known_subrange_p (newr.offset, newr.size, r->offset, r->size)) |
| 2030 | return NULLnullptr; |
| 2031 | r->size |
| 2032 | = MAX (r->offset + r->size, newr.offset + newr.size)((r->offset + r->size) > (newr.offset + newr.size) ? (r->offset + r->size) : (newr.offset + newr.size)) - r->offset; |
| 2033 | } |
| 2034 | else |
| 2035 | { |
| 2036 | /* newr.offset wasn't covered yet, insert the range. */ |
| 2037 | r = XOBNEW (&ranges_obstack, pd_range)((pd_range *) __extension__ ({ struct obstack *__h = ((&ranges_obstack )); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (pd_range))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1-> next_free); }) < __len) _obstack_newchunk (__o, __len); (( void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1-> object_base; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); })); |
| 2038 | *r = newr; |
| 2039 | splay_tree_insert (known_ranges, (splay_tree_key)&r->offset, |
| 2040 | (splay_tree_value)r); |
| 2041 | } |
| 2042 | /* Merge r which now contains newr and is a member of the splay tree with |
| 2043 | adjacent overlapping ranges. */ |
| 2044 | pd_range *rafter; |
| 2045 | while ((n = splay_tree_successor (known_ranges, |
| 2046 | (splay_tree_key)&r->offset)) |
| 2047 | && ((rafter = (pd_range *)n->value), true) |
| 2048 | && ranges_known_overlap_p (r->offset, r->size + 1, |
| 2049 | rafter->offset, rafter->size)) |
| 2050 | { |
| 2051 | r->size = MAX (r->offset + r->size,((r->offset + r->size) > (rafter->offset + rafter ->size) ? (r->offset + r->size) : (rafter->offset + rafter->size)) |
| 2052 | rafter->offset + rafter->size)((r->offset + r->size) > (rafter->offset + rafter ->size) ? (r->offset + r->size) : (rafter->offset + rafter->size)) - r->offset; |
| 2053 | splay_tree_remove (known_ranges, (splay_tree_key)&rafter->offset); |
| 2054 | } |
| 2055 | /* If we get a clobber, fail. */ |
| 2056 | if (TREE_CLOBBER_P (pd.rhs)(((enum tree_code) (pd.rhs)->base.code) == CONSTRUCTOR && ((pd.rhs)->base.volatile_flag))) |
| 2057 | return (void *)-1; |
| 2058 | /* Non-constants are OK as long as they are shadowed by a constant. */ |
| 2059 | if (!pd_constant_p) |
| 2060 | return (void *)-1; |
| 2061 | partial_defs.safe_push (pd); |
| 2062 | } |
| 2063 | |
| 2064 | /* Now we have merged newr into the range tree. When we have covered |
| 2065 | [offseti, sizei] then the tree will contain exactly one node which has |
| 2066 | the desired properties and it will be 'r'. */ |
| 2067 | if (!known_subrange_p (0, maxsizei, r->offset, r->size)) |
| 2068 | /* Continue looking for partial defs. */ |
| 2069 | return NULLnullptr; |
| 2070 | |
| 2071 | /* Now simply native encode all partial defs in reverse order. */ |
| 2072 | unsigned ndefs = partial_defs.length (); |
| 2073 | /* We support up to 512-bit values (for V8DFmode). */ |
| 2074 | unsigned char buffer[bufsize + 1]; |
| 2075 | unsigned char this_buffer[bufsize + 1]; |
| 2076 | int len; |
| 2077 | |
| 2078 | memset (buffer, 0, bufsize + 1); |
| 2079 | unsigned needed_len = ROUND_UP (maxsizei, BITS_PER_UNIT)(((maxsizei) + ((8)) - 1) & ~(((8)) - 1)) / BITS_PER_UNIT(8); |
| 2080 | while (!partial_defs.is_empty ()) |
| 2081 | { |
| 2082 | pd_data pd = partial_defs.pop (); |
| 2083 | unsigned int amnt; |
| 2084 | if (TREE_CODE (pd.rhs)((enum tree_code) (pd.rhs)->base.code) == CONSTRUCTOR) |
| 2085 | { |
| 2086 | /* Empty CONSTRUCTOR. */ |
| 2087 | if (pd.size >= needed_len * BITS_PER_UNIT(8)) |
| 2088 | len = needed_len; |
| 2089 | else |
| 2090 | len = ROUND_UP (pd.size, BITS_PER_UNIT)(((pd.size) + ((8)) - 1) & ~(((8)) - 1)) / BITS_PER_UNIT(8); |
| 2091 | memset (this_buffer, 0, len); |
| 2092 | } |
| 2093 | else if (pd.rhs_off >= 0) |
| 2094 | { |
| 2095 | len = native_encode_expr (pd.rhs, this_buffer, bufsize, |
| 2096 | (MAX (0, -pd.offset)((0) > (-pd.offset) ? (0) : (-pd.offset)) |
| 2097 | + pd.rhs_off) / BITS_PER_UNIT(8)); |
| 2098 | if (len <= 0 |
| 2099 | || len < (ROUND_UP (pd.size, BITS_PER_UNIT)(((pd.size) + ((8)) - 1) & ~(((8)) - 1)) / BITS_PER_UNIT(8) |
| 2100 | - MAX (0, -pd.offset)((0) > (-pd.offset) ? (0) : (-pd.offset)) / BITS_PER_UNIT(8))) |
| 2101 | { |
| 2102 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 2103 | fprintf (dump_file, "Failed to encode %u " |
| 2104 | "partial definitions\n", ndefs); |
| 2105 | return (void *)-1; |
| 2106 | } |
| 2107 | } |
| 2108 | else /* negative pd.rhs_off indicates we want to chop off first bits */ |
| 2109 | { |
| 2110 | if (-pd.rhs_off >= bufsize) |
| 2111 | return (void *)-1; |
| 2112 | len = native_encode_expr (pd.rhs, |
| 2113 | this_buffer + -pd.rhs_off / BITS_PER_UNIT(8), |
| 2114 | bufsize - -pd.rhs_off / BITS_PER_UNIT(8), |
| 2115 | MAX (0, -pd.offset)((0) > (-pd.offset) ? (0) : (-pd.offset)) / BITS_PER_UNIT(8)); |
| 2116 | if (len <= 0 |
| 2117 | || len < (ROUND_UP (pd.size, BITS_PER_UNIT)(((pd.size) + ((8)) - 1) & ~(((8)) - 1)) / BITS_PER_UNIT(8) |
| 2118 | - MAX (0, -pd.offset)((0) > (-pd.offset) ? (0) : (-pd.offset)) / BITS_PER_UNIT(8))) |
| 2119 | { |
| 2120 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 2121 | fprintf (dump_file, "Failed to encode %u " |
| 2122 | "partial definitions\n", ndefs); |
| 2123 | return (void *)-1; |
| 2124 | } |
| 2125 | } |
| 2126 | |
| 2127 | unsigned char *p = buffer; |
| 2128 | HOST_WIDE_INTlong size = pd.size; |
| 2129 | if (pd.offset < 0) |
| 2130 | size -= ROUND_DOWN (-pd.offset, BITS_PER_UNIT)((-pd.offset) & ~(((8)) - 1)); |
| 2131 | this_buffer[len] = 0; |
| 2132 | if (BYTES_BIG_ENDIAN0) |
| 2133 | { |
| 2134 | /* LSB of this_buffer[len - 1] byte should be at |
| 2135 | pd.offset + pd.size - 1 bits in buffer. */ |
| 2136 | amnt = ((unsigned HOST_WIDE_INTlong) pd.offset |
| 2137 | + pd.size) % BITS_PER_UNIT(8); |
| 2138 | if (amnt) |
| 2139 | shift_bytes_in_array_right (this_buffer, len + 1, amnt); |
| 2140 | unsigned char *q = this_buffer; |
| 2141 | unsigned int off = 0; |
| 2142 | if (pd.offset >= 0) |
| 2143 | { |
| 2144 | unsigned int msk; |
| 2145 | off = pd.offset / BITS_PER_UNIT(8); |
| 2146 | gcc_assert (off < needed_len)((void)(!(off < needed_len) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2146, __FUNCTION__), 0 : 0)); |
| 2147 | p = buffer + off; |
| 2148 | if (size <= amnt) |
| 2149 | { |
| 2150 | msk = ((1 << size) - 1) << (BITS_PER_UNIT(8) - amnt); |
| 2151 | *p = (*p & ~msk) | (this_buffer[len] & msk); |
| 2152 | size = 0; |
| 2153 | } |
| 2154 | else |
| 2155 | { |
| 2156 | if (TREE_CODE (pd.rhs)((enum tree_code) (pd.rhs)->base.code) != CONSTRUCTOR) |
| 2157 | q = (this_buffer + len |
| 2158 | - (ROUND_UP (size - amnt, BITS_PER_UNIT)(((size - amnt) + ((8)) - 1) & ~(((8)) - 1)) |
| 2159 | / BITS_PER_UNIT(8))); |
| 2160 | if (pd.offset % BITS_PER_UNIT(8)) |
| 2161 | { |
| 2162 | msk = -1U << (BITS_PER_UNIT(8) |
| 2163 | - (pd.offset % BITS_PER_UNIT(8))); |
| 2164 | *p = (*p & msk) | (*q & ~msk); |
| 2165 | p++; |
| 2166 | q++; |
| 2167 | off++; |
| 2168 | size -= BITS_PER_UNIT(8) - (pd.offset % BITS_PER_UNIT(8)); |
| 2169 | gcc_assert (size >= 0)((void)(!(size >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2169, __FUNCTION__), 0 : 0)); |
| 2170 | } |
| 2171 | } |
| 2172 | } |
| 2173 | else if (TREE_CODE (pd.rhs)((enum tree_code) (pd.rhs)->base.code) != CONSTRUCTOR) |
| 2174 | { |
| 2175 | q = (this_buffer + len |
| 2176 | - (ROUND_UP (size - amnt, BITS_PER_UNIT)(((size - amnt) + ((8)) - 1) & ~(((8)) - 1)) |
| 2177 | / BITS_PER_UNIT(8))); |
| 2178 | if (pd.offset % BITS_PER_UNIT(8)) |
| 2179 | { |
| 2180 | q++; |
| 2181 | size -= BITS_PER_UNIT(8) - ((unsigned HOST_WIDE_INTlong) pd.offset |
| 2182 | % BITS_PER_UNIT(8)); |
| 2183 | gcc_assert (size >= 0)((void)(!(size >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2183, __FUNCTION__), 0 : 0)); |
| 2184 | } |
| 2185 | } |
| 2186 | if ((unsigned HOST_WIDE_INTlong) size / BITS_PER_UNIT(8) + off |
| 2187 | > needed_len) |
| 2188 | size = (needed_len - off) * BITS_PER_UNIT(8); |
| 2189 | memcpy (p, q, size / BITS_PER_UNIT(8)); |
| 2190 | if (size % BITS_PER_UNIT(8)) |
| 2191 | { |
| 2192 | unsigned int msk |
| 2193 | = -1U << (BITS_PER_UNIT(8) - (size % BITS_PER_UNIT(8))); |
| 2194 | p += size / BITS_PER_UNIT(8); |
| 2195 | q += size / BITS_PER_UNIT(8); |
| 2196 | *p = (*q & msk) | (*p & ~msk); |
| 2197 | } |
| 2198 | } |
| 2199 | else |
| 2200 | { |
| 2201 | if (pd.offset >= 0) |
| 2202 | { |
| 2203 | /* LSB of this_buffer[0] byte should be at pd.offset bits |
| 2204 | in buffer. */ |
| 2205 | unsigned int msk; |
| 2206 | size = MIN (size, (HOST_WIDE_INT) needed_len * BITS_PER_UNIT)((size) < ((long) needed_len * (8)) ? (size) : ((long) needed_len * (8))); |
| 2207 | amnt = pd.offset % BITS_PER_UNIT(8); |
| 2208 | if (amnt) |
| 2209 | shift_bytes_in_array_left (this_buffer, len + 1, amnt); |
| 2210 | unsigned int off = pd.offset / BITS_PER_UNIT(8); |
| 2211 | gcc_assert (off < needed_len)((void)(!(off < needed_len) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2211, __FUNCTION__), 0 : 0)); |
| 2212 | size = MIN (size,((size) < ((long) (needed_len - off) * (8)) ? (size) : ((long ) (needed_len - off) * (8))) |
| 2213 | (HOST_WIDE_INT) (needed_len - off) * BITS_PER_UNIT)((size) < ((long) (needed_len - off) * (8)) ? (size) : ((long ) (needed_len - off) * (8))); |
| 2214 | p = buffer + off; |
| 2215 | if (amnt + size < BITS_PER_UNIT(8)) |
| 2216 | { |
| 2217 | /* Low amnt bits come from *p, then size bits |
| 2218 | from this_buffer[0] and the remaining again from |
| 2219 | *p. */ |
| 2220 | msk = ((1 << size) - 1) << amnt; |
| 2221 | *p = (*p & ~msk) | (this_buffer[0] & msk); |
| 2222 | size = 0; |
| 2223 | } |
| 2224 | else if (amnt) |
| 2225 | { |
| 2226 | msk = -1U << amnt; |
| 2227 | *p = (*p & ~msk) | (this_buffer[0] & msk); |
| 2228 | p++; |
| 2229 | size -= (BITS_PER_UNIT(8) - amnt); |
| 2230 | } |
| 2231 | } |
| 2232 | else |
| 2233 | { |
| 2234 | amnt = (unsigned HOST_WIDE_INTlong) pd.offset % BITS_PER_UNIT(8); |
| 2235 | if (amnt) |
| 2236 | size -= BITS_PER_UNIT(8) - amnt; |
| 2237 | size = MIN (size, (HOST_WIDE_INT) needed_len * BITS_PER_UNIT)((size) < ((long) needed_len * (8)) ? (size) : ((long) needed_len * (8))); |
| 2238 | if (amnt) |
| 2239 | shift_bytes_in_array_left (this_buffer, len + 1, amnt); |
| 2240 | } |
| 2241 | memcpy (p, this_buffer + (amnt != 0), size / BITS_PER_UNIT(8)); |
| 2242 | p += size / BITS_PER_UNIT(8); |
| 2243 | if (size % BITS_PER_UNIT(8)) |
| 2244 | { |
| 2245 | unsigned int msk = -1U << (size % BITS_PER_UNIT(8)); |
| 2246 | *p = (this_buffer[(amnt != 0) + size / BITS_PER_UNIT(8)] |
| 2247 | & ~msk) | (*p & msk); |
| 2248 | } |
| 2249 | } |
| 2250 | } |
| 2251 | |
| 2252 | tree type = vr->type; |
| 2253 | /* Make sure to interpret in a type that has a range covering the whole |
| 2254 | access size. */ |
| 2255 | if (INTEGRAL_TYPE_P (vr->type)(((enum tree_code) (vr->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr->type)->base.code) == INTEGER_TYPE ) && maxsizei != TYPE_PRECISION (vr->type)((tree_class_check ((vr->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2255, __FUNCTION__))->type_common.precision)) |
| 2256 | type = build_nonstandard_integer_type (maxsizei, TYPE_UNSIGNED (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2256, __FUNCTION__))->base.u.bits.unsigned_flag)); |
| 2257 | tree val; |
| 2258 | if (BYTES_BIG_ENDIAN0) |
| 2259 | { |
| 2260 | unsigned sz = needed_len; |
| 2261 | if (maxsizei % BITS_PER_UNIT(8)) |
| 2262 | shift_bytes_in_array_right (buffer, needed_len, |
| 2263 | BITS_PER_UNIT(8) |
| 2264 | - (maxsizei % BITS_PER_UNIT(8))); |
| 2265 | if (INTEGRAL_TYPE_P (type)(((enum tree_code) (type)->base.code) == ENUMERAL_TYPE || ( (enum tree_code) (type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (type)->base.code) == INTEGER_TYPE)) |
| 2266 | sz = GET_MODE_SIZE (SCALAR_INT_TYPE_MODE (type)(as_a <scalar_int_mode> ((tree_class_check ((type), (tcc_type ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2266, __FUNCTION__))->type_common.mode))); |
| 2267 | if (sz > needed_len) |
| 2268 | { |
| 2269 | memcpy (this_buffer + (sz - needed_len), buffer, needed_len); |
| 2270 | val = native_interpret_expr (type, this_buffer, sz); |
| 2271 | } |
| 2272 | else |
| 2273 | val = native_interpret_expr (type, buffer, needed_len); |
| 2274 | } |
| 2275 | else |
| 2276 | val = native_interpret_expr (type, buffer, bufsize); |
| 2277 | /* If we chop off bits because the types precision doesn't match the memory |
| 2278 | access size this is ok when optimizing reads but not when called from |
| 2279 | the DSE code during elimination. */ |
| 2280 | if (val && type != vr->type) |
| 2281 | { |
| 2282 | if (! int_fits_type_p (val, vr->type)) |
| 2283 | val = NULL_TREE(tree) nullptr; |
| 2284 | else |
| 2285 | val = fold_convert (vr->type, val)fold_convert_loc (((location_t) 0), vr->type, val); |
| 2286 | } |
| 2287 | |
| 2288 | if (val) |
| 2289 | { |
| 2290 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 2291 | fprintf (dump_file, |
| 2292 | "Successfully combined %u partial definitions\n", ndefs); |
| 2293 | /* We are using the alias-set of the first store we encounter which |
| 2294 | should be appropriate here. */ |
| 2295 | return finish (first_set, first_base_set, val); |
| 2296 | } |
| 2297 | else |
| 2298 | { |
| 2299 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 2300 | fprintf (dump_file, |
| 2301 | "Failed to interpret %u encoded partial definitions\n", ndefs); |
| 2302 | return (void *)-1; |
| 2303 | } |
| 2304 | } |
| 2305 | |
| 2306 | /* Callback for walk_non_aliased_vuses. Adjusts the vn_reference_t VR_ |
| 2307 | with the current VUSE and performs the expression lookup. */ |
| 2308 | |
| 2309 | static void * |
| 2310 | vn_reference_lookup_2 (ao_ref *op ATTRIBUTE_UNUSED__attribute__ ((__unused__)), tree vuse, void *data_) |
| 2311 | { |
| 2312 | vn_walk_cb_data *data = (vn_walk_cb_data *)data_; |
| 2313 | vn_reference_t vr = data->vr; |
| 2314 | vn_reference_s **slot; |
| 2315 | hashval_t hash; |
| 2316 | |
| 2317 | /* If we have partial definitions recorded we have to go through |
| 2318 | vn_reference_lookup_3. */ |
| 2319 | if (!data->partial_defs.is_empty ()) |
| 2320 | return NULLnullptr; |
| 2321 | |
| 2322 | if (data->last_vuse_ptr) |
| 2323 | { |
| 2324 | *data->last_vuse_ptr = vuse; |
| 2325 | data->last_vuse = vuse; |
| 2326 | } |
| 2327 | |
| 2328 | /* Fixup vuse and hash. */ |
| 2329 | if (vr->vuse) |
| 2330 | vr->hashcode = vr->hashcode - SSA_NAME_VERSION (vr->vuse)(tree_check ((vr->vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2330, __FUNCTION__, (SSA_NAME)))->base.u.version; |
| 2331 | vr->vuse = vuse_ssa_val (vuse); |
| 2332 | if (vr->vuse) |
| 2333 | vr->hashcode = vr->hashcode + SSA_NAME_VERSION (vr->vuse)(tree_check ((vr->vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2333, __FUNCTION__, (SSA_NAME)))->base.u.version; |
| 2334 | |
| 2335 | hash = vr->hashcode; |
| 2336 | slot = valid_info->references->find_slot_with_hash (vr, hash, NO_INSERT); |
| 2337 | if (slot) |
| 2338 | { |
| 2339 | if ((*slot)->result && data->saved_operands.exists ()) |
| 2340 | return data->finish (vr->set, vr->base_set, (*slot)->result); |
| 2341 | return *slot; |
| 2342 | } |
| 2343 | |
| 2344 | return NULLnullptr; |
| 2345 | } |
| 2346 | |
| 2347 | /* Lookup an existing or insert a new vn_reference entry into the |
| 2348 | value table for the VUSE, SET, TYPE, OPERANDS reference which |
| 2349 | has the value VALUE which is either a constant or an SSA name. */ |
| 2350 | |
| 2351 | static vn_reference_t |
| 2352 | vn_reference_lookup_or_insert_for_pieces (tree vuse, |
| 2353 | alias_set_type set, |
| 2354 | alias_set_type base_set, |
| 2355 | tree type, |
| 2356 | vec<vn_reference_op_s, |
| 2357 | va_heap> operands, |
| 2358 | tree value) |
| 2359 | { |
| 2360 | vn_reference_s vr1; |
| 2361 | vn_reference_t result; |
| 2362 | unsigned value_id; |
| 2363 | vr1.vuse = vuse ? SSA_VAL (vuse) : NULL_TREE(tree) nullptr; |
| 2364 | vr1.operands = operands; |
| 2365 | vr1.type = type; |
| 2366 | vr1.set = set; |
| 2367 | vr1.base_set = base_set; |
| 2368 | vr1.hashcode = vn_reference_compute_hash (&vr1); |
| 2369 | if (vn_reference_lookup_1 (&vr1, &result)) |
| 2370 | return result; |
| 2371 | if (TREE_CODE (value)((enum tree_code) (value)->base.code) == SSA_NAME) |
| 2372 | value_id = VN_INFO (value)->value_id; |
| 2373 | else |
| 2374 | value_id = get_or_alloc_constant_value_id (value); |
| 2375 | return vn_reference_insert_pieces (vuse, set, base_set, type, |
| 2376 | operands.copy (), value, value_id); |
| 2377 | } |
| 2378 | |
| 2379 | /* Return a value-number for RCODE OPS... either by looking up an existing |
| 2380 | value-number for the possibly simplified result or by inserting the |
| 2381 | operation if INSERT is true. If SIMPLIFY is false, return a value |
| 2382 | number for the unsimplified expression. */ |
| 2383 | |
| 2384 | static tree |
| 2385 | vn_nary_build_or_lookup_1 (gimple_match_op *res_op, bool insert, |
| 2386 | bool simplify) |
| 2387 | { |
| 2388 | tree result = NULL_TREE(tree) nullptr; |
| 2389 | /* We will be creating a value number for |
| 2390 | RCODE (OPS...). |
| 2391 | So first simplify and lookup this expression to see if it |
| 2392 | is already available. */ |
| 2393 | /* For simplification valueize. */ |
| 2394 | unsigned i = 0; |
| 2395 | if (simplify) |
| 2396 | for (i = 0; i < res_op->num_ops; ++i) |
| 2397 | if (TREE_CODE (res_op->ops[i])((enum tree_code) (res_op->ops[i])->base.code) == SSA_NAME) |
| 2398 | { |
| 2399 | tree tem = vn_valueize (res_op->ops[i]); |
| 2400 | if (!tem) |
| 2401 | break; |
| 2402 | res_op->ops[i] = tem; |
| 2403 | } |
| 2404 | /* If valueization of an operand fails (it is not available), skip |
| 2405 | simplification. */ |
| 2406 | bool res = false; |
| 2407 | if (i == res_op->num_ops) |
| 2408 | { |
| 2409 | mprts_hook = vn_lookup_simplify_result; |
| 2410 | res = res_op->resimplify (NULLnullptr, vn_valueize); |
| 2411 | mprts_hook = NULLnullptr; |
| 2412 | } |
| 2413 | gimple *new_stmt = NULLnullptr; |
| 2414 | if (res |
| 2415 | && gimple_simplified_result_is_gimple_val (res_op)) |
| 2416 | { |
| 2417 | /* The expression is already available. */ |
| 2418 | result = res_op->ops[0]; |
| 2419 | /* Valueize it, simplification returns sth in AVAIL only. */ |
| 2420 | if (TREE_CODE (result)((enum tree_code) (result)->base.code) == SSA_NAME) |
| 2421 | result = SSA_VAL (result); |
| 2422 | } |
| 2423 | else |
| 2424 | { |
| 2425 | tree val = vn_lookup_simplify_result (res_op); |
| 2426 | if (!val && insert) |
| 2427 | { |
| 2428 | gimple_seq stmts = NULLnullptr; |
| 2429 | result = maybe_push_res_to_seq (res_op, &stmts); |
| 2430 | if (result) |
| 2431 | { |
| 2432 | gcc_assert (gimple_seq_singleton_p (stmts))((void)(!(gimple_seq_singleton_p (stmts)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2432, __FUNCTION__), 0 : 0)); |
| 2433 | new_stmt = gimple_seq_first_stmt (stmts); |
| 2434 | } |
| 2435 | } |
| 2436 | else |
| 2437 | /* The expression is already available. */ |
| 2438 | result = val; |
| 2439 | } |
| 2440 | if (new_stmt) |
| 2441 | { |
| 2442 | /* The expression is not yet available, value-number lhs to |
| 2443 | the new SSA_NAME we created. */ |
| 2444 | /* Initialize value-number information properly. */ |
| 2445 | vn_ssa_aux_t result_info = VN_INFO (result); |
| 2446 | result_info->valnum = result; |
| 2447 | result_info->value_id = get_next_value_id (); |
| 2448 | result_info->visited = 1; |
| 2449 | gimple_seq_add_stmt_without_update (&VN_INFO (result)->expr, |
| 2450 | new_stmt); |
| 2451 | result_info->needs_insertion = true; |
| 2452 | /* ??? PRE phi-translation inserts NARYs without corresponding |
| 2453 | SSA name result. Re-use those but set their result according |
| 2454 | to the stmt we just built. */ |
| 2455 | vn_nary_op_t nary = NULLnullptr; |
| 2456 | vn_nary_op_lookup_stmt (new_stmt, &nary); |
| 2457 | if (nary) |
| 2458 | { |
| 2459 | gcc_assert (! nary->predicated_values && nary->u.result == NULL_TREE)((void)(!(! nary->predicated_values && nary->u. result == (tree) nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2459, __FUNCTION__), 0 : 0)); |
| 2460 | nary->u.result = gimple_assign_lhs (new_stmt); |
| 2461 | } |
| 2462 | /* As all "inserted" statements are singleton SCCs, insert |
| 2463 | to the valid table. This is strictly needed to |
| 2464 | avoid re-generating new value SSA_NAMEs for the same |
| 2465 | expression during SCC iteration over and over (the |
| 2466 | optimistic table gets cleared after each iteration). |
| 2467 | We do not need to insert into the optimistic table, as |
| 2468 | lookups there will fall back to the valid table. */ |
| 2469 | else |
| 2470 | { |
| 2471 | unsigned int length = vn_nary_length_from_stmt (new_stmt); |
| 2472 | vn_nary_op_t vno1 |
| 2473 | = alloc_vn_nary_op_noinit (length, &vn_tables_insert_obstack); |
| 2474 | vno1->value_id = result_info->value_id; |
| 2475 | vno1->length = length; |
| 2476 | vno1->predicated_values = 0; |
| 2477 | vno1->u.result = result; |
| 2478 | init_vn_nary_op_from_stmt (vno1, as_a <gassign *> (new_stmt)); |
| 2479 | vn_nary_op_insert_into (vno1, valid_info->nary); |
| 2480 | /* Also do not link it into the undo chain. */ |
| 2481 | last_inserted_nary = vno1->next; |
| 2482 | vno1->next = (vn_nary_op_t)(void *)-1; |
| 2483 | } |
| 2484 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 2485 | { |
| 2486 | fprintf (dump_file, "Inserting name "); |
| 2487 | print_generic_expr (dump_file, result); |
| 2488 | fprintf (dump_file, " for expression "); |
| 2489 | print_gimple_expr (dump_file, new_stmt, 0, TDF_SLIM); |
| 2490 | fprintf (dump_file, "\n"); |
| 2491 | } |
| 2492 | } |
| 2493 | return result; |
| 2494 | } |
| 2495 | |
| 2496 | /* Return a value-number for RCODE OPS... either by looking up an existing |
| 2497 | value-number for the simplified result or by inserting the operation. */ |
| 2498 | |
| 2499 | static tree |
| 2500 | vn_nary_build_or_lookup (gimple_match_op *res_op) |
| 2501 | { |
| 2502 | return vn_nary_build_or_lookup_1 (res_op, true, true); |
| 2503 | } |
| 2504 | |
| 2505 | /* Try to simplify the expression RCODE OPS... of type TYPE and return |
| 2506 | its value if present. */ |
| 2507 | |
| 2508 | tree |
| 2509 | vn_nary_simplify (vn_nary_op_t nary) |
| 2510 | { |
| 2511 | if (nary->length > gimple_match_op::MAX_NUM_OPS) |
| 2512 | return NULL_TREE(tree) nullptr; |
| 2513 | gimple_match_op op (gimple_match_cond::UNCOND, nary->opcode, |
| 2514 | nary->type, nary->length); |
| 2515 | memcpy (op.ops, nary->op, sizeof (tree) * nary->length); |
| 2516 | return vn_nary_build_or_lookup_1 (&op, false, true); |
| 2517 | } |
| 2518 | |
| 2519 | /* Elimination engine. */ |
| 2520 | |
| 2521 | class eliminate_dom_walker : public dom_walker |
| 2522 | { |
| 2523 | public: |
| 2524 | eliminate_dom_walker (cdi_direction, bitmap); |
| 2525 | ~eliminate_dom_walker (); |
| 2526 | |
| 2527 | edge before_dom_children (basic_block) final override; |
| 2528 | void after_dom_children (basic_block) final override; |
| 2529 | |
| 2530 | virtual tree eliminate_avail (basic_block, tree op); |
| 2531 | virtual void eliminate_push_avail (basic_block, tree op); |
| 2532 | tree eliminate_insert (basic_block, gimple_stmt_iterator *gsi, tree val); |
| 2533 | |
| 2534 | void eliminate_stmt (basic_block, gimple_stmt_iterator *); |
| 2535 | |
| 2536 | unsigned eliminate_cleanup (bool region_p = false); |
| 2537 | |
| 2538 | bool do_pre; |
| 2539 | unsigned int el_todo; |
| 2540 | unsigned int eliminations; |
| 2541 | unsigned int insertions; |
| 2542 | |
| 2543 | /* SSA names that had their defs inserted by PRE if do_pre. */ |
| 2544 | bitmap inserted_exprs; |
| 2545 | |
| 2546 | /* Blocks with statements that have had their EH properties changed. */ |
| 2547 | bitmap need_eh_cleanup; |
| 2548 | |
| 2549 | /* Blocks with statements that have had their AB properties changed. */ |
| 2550 | bitmap need_ab_cleanup; |
| 2551 | |
| 2552 | /* Local state for the eliminate domwalk. */ |
| 2553 | auto_vec<gimple *> to_remove; |
| 2554 | auto_vec<gimple *> to_fixup; |
| 2555 | auto_vec<tree> avail; |
| 2556 | auto_vec<tree> avail_stack; |
| 2557 | }; |
| 2558 | |
| 2559 | /* Adaptor to the elimination engine using RPO availability. */ |
| 2560 | |
| 2561 | class rpo_elim : public eliminate_dom_walker |
| 2562 | { |
| 2563 | public: |
| 2564 | rpo_elim(basic_block entry_) |
| 2565 | : eliminate_dom_walker (CDI_DOMINATORS, NULLnullptr), entry (entry_), |
| 2566 | m_avail_freelist (NULLnullptr) {} |
| 2567 | |
| 2568 | tree eliminate_avail (basic_block, tree op) final override; |
| 2569 | |
| 2570 | void eliminate_push_avail (basic_block, tree) final override; |
| 2571 | |
| 2572 | basic_block entry; |
| 2573 | /* Freelist of avail entries which are allocated from the vn_ssa_aux |
| 2574 | obstack. */ |
| 2575 | vn_avail *m_avail_freelist; |
| 2576 | }; |
| 2577 | |
| 2578 | /* Global RPO state for access from hooks. */ |
| 2579 | static eliminate_dom_walker *rpo_avail; |
| 2580 | basic_block vn_context_bb; |
| 2581 | |
| 2582 | /* Return true if BASE1 and BASE2 can be adjusted so they have the |
| 2583 | same address and adjust *OFFSET1 and *OFFSET2 accordingly. |
| 2584 | Otherwise return false. */ |
| 2585 | |
| 2586 | static bool |
| 2587 | adjust_offsets_for_equal_base_address (tree base1, poly_int64 *offset1, |
| 2588 | tree base2, poly_int64 *offset2) |
| 2589 | { |
| 2590 | poly_int64 soff; |
| 2591 | if (TREE_CODE (base1)((enum tree_code) (base1)->base.code) == MEM_REF |
| 2592 | && TREE_CODE (base2)((enum tree_code) (base2)->base.code) == MEM_REF) |
| 2593 | { |
| 2594 | if (mem_ref_offset (base1).to_shwi (&soff)) |
| 2595 | { |
| 2596 | base1 = TREE_OPERAND (base1, 0)(*((const_cast<tree*> (tree_operand_check ((base1), (0) , "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2596, __FUNCTION__))))); |
| 2597 | *offset1 += soff * BITS_PER_UNIT(8); |
| 2598 | } |
| 2599 | if (mem_ref_offset (base2).to_shwi (&soff)) |
| 2600 | { |
| 2601 | base2 = TREE_OPERAND (base2, 0)(*((const_cast<tree*> (tree_operand_check ((base2), (0) , "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2601, __FUNCTION__))))); |
| 2602 | *offset2 += soff * BITS_PER_UNIT(8); |
| 2603 | } |
| 2604 | return operand_equal_p (base1, base2, 0); |
| 2605 | } |
| 2606 | return operand_equal_p (base1, base2, OEP_ADDRESS_OF); |
| 2607 | } |
| 2608 | |
| 2609 | /* Callback for walk_non_aliased_vuses. Tries to perform a lookup |
| 2610 | from the statement defining VUSE and if not successful tries to |
| 2611 | translate *REFP and VR_ through an aggregate copy at the definition |
| 2612 | of VUSE. If *DISAMBIGUATE_ONLY is true then do not perform translation |
| 2613 | of *REF and *VR. If only disambiguation was performed then |
| 2614 | *DISAMBIGUATE_ONLY is set to true. */ |
| 2615 | |
| 2616 | static void * |
| 2617 | vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *data_, |
| 2618 | translate_flags *disambiguate_only) |
| 2619 | { |
| 2620 | vn_walk_cb_data *data = (vn_walk_cb_data *)data_; |
| 2621 | vn_reference_t vr = data->vr; |
| 2622 | gimple *def_stmt = SSA_NAME_DEF_STMT (vuse)(tree_check ((vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2622, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt; |
| 2623 | tree base = ao_ref_base (ref); |
| 2624 | HOST_WIDE_INTlong offseti = 0, maxsizei, sizei = 0; |
| 2625 | static vec<vn_reference_op_s> lhs_ops; |
| 2626 | ao_ref lhs_ref; |
| 2627 | bool lhs_ref_ok = false; |
| 2628 | poly_int64 copy_size; |
| 2629 | |
| 2630 | /* First try to disambiguate after value-replacing in the definitions LHS. */ |
| 2631 | if (is_gimple_assign (def_stmt)) |
| 2632 | { |
| 2633 | tree lhs = gimple_assign_lhs (def_stmt); |
| 2634 | bool valueized_anything = false; |
| 2635 | /* Avoid re-allocation overhead. */ |
| 2636 | lhs_ops.truncate (0); |
| 2637 | basic_block saved_rpo_bb = vn_context_bb; |
| 2638 | vn_context_bb = gimple_bb (def_stmt); |
| 2639 | if (*disambiguate_only <= TR_VALUEIZE_AND_DISAMBIGUATE) |
| 2640 | { |
| 2641 | copy_reference_ops_from_ref (lhs, &lhs_ops); |
| 2642 | valueize_refs_1 (&lhs_ops, &valueized_anything, true); |
| 2643 | } |
| 2644 | vn_context_bb = saved_rpo_bb; |
| 2645 | ao_ref_init (&lhs_ref, lhs); |
| 2646 | lhs_ref_ok = true; |
| 2647 | if (valueized_anything |
| 2648 | && ao_ref_init_from_vn_reference |
| 2649 | (&lhs_ref, ao_ref_alias_set (&lhs_ref), |
| 2650 | ao_ref_base_alias_set (&lhs_ref), TREE_TYPE (lhs)((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2650, __FUNCTION__))->typed.type), lhs_ops) |
| 2651 | && !refs_may_alias_p_1 (ref, &lhs_ref, data->tbaa_p)) |
| 2652 | { |
| 2653 | *disambiguate_only = TR_VALUEIZE_AND_DISAMBIGUATE; |
| 2654 | return NULLnullptr; |
| 2655 | } |
| 2656 | |
| 2657 | /* When the def is a CLOBBER we can optimistically disambiguate |
| 2658 | against it since any overlap it would be undefined behavior. |
| 2659 | Avoid this for obvious must aliases to save compile-time though. |
| 2660 | We also may not do this when the query is used for redundant |
| 2661 | store removal. */ |
| 2662 | if (!data->redundant_store_removal_p |
| 2663 | && gimple_clobber_p (def_stmt) |
| 2664 | && !operand_equal_p (ao_ref_base (&lhs_ref), base, OEP_ADDRESS_OF)) |
| 2665 | { |
| 2666 | *disambiguate_only = TR_DISAMBIGUATE; |
| 2667 | return NULLnullptr; |
| 2668 | } |
| 2669 | |
| 2670 | /* Besides valueizing the LHS we can also use access-path based |
| 2671 | disambiguation on the original non-valueized ref. */ |
| 2672 | if (!ref->ref |
| 2673 | && lhs_ref_ok |
| 2674 | && data->orig_ref.ref) |
| 2675 | { |
| 2676 | /* We want to use the non-valueized LHS for this, but avoid redundant |
| 2677 | work. */ |
| 2678 | ao_ref *lref = &lhs_ref; |
| 2679 | ao_ref lref_alt; |
| 2680 | if (valueized_anything) |
| 2681 | { |
| 2682 | ao_ref_init (&lref_alt, lhs); |
| 2683 | lref = &lref_alt; |
| 2684 | } |
| 2685 | if (!refs_may_alias_p_1 (&data->orig_ref, lref, data->tbaa_p)) |
| 2686 | { |
| 2687 | *disambiguate_only = (valueized_anything |
| 2688 | ? TR_VALUEIZE_AND_DISAMBIGUATE |
| 2689 | : TR_DISAMBIGUATE); |
| 2690 | return NULLnullptr; |
| 2691 | } |
| 2692 | } |
| 2693 | |
| 2694 | /* If we reach a clobbering statement try to skip it and see if |
| 2695 | we find a VN result with exactly the same value as the |
| 2696 | possible clobber. In this case we can ignore the clobber |
| 2697 | and return the found value. */ |
| 2698 | if (is_gimple_reg_type (TREE_TYPE (lhs)((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2698, __FUNCTION__))->typed.type)) |
| 2699 | && types_compatible_p (TREE_TYPE (lhs)((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2699, __FUNCTION__))->typed.type), vr->type) |
| 2700 | && (ref->ref || data->orig_ref.ref) |
| 2701 | && !data->mask |
| 2702 | && data->partial_defs.is_empty () |
| 2703 | && multiple_p (get_object_alignment |
| 2704 | (ref->ref ? ref->ref : data->orig_ref.ref), |
| 2705 | ref->size) |
| 2706 | && multiple_p (get_object_alignment (lhs), ref->size)) |
| 2707 | { |
| 2708 | tree rhs = gimple_assign_rhs1 (def_stmt); |
| 2709 | /* ??? We may not compare to ahead values which might be from |
| 2710 | a different loop iteration but only to loop invariants. Use |
| 2711 | CONSTANT_CLASS_P (unvalueized!) as conservative approximation. |
| 2712 | The one-hop lookup below doesn't have this issue since there's |
| 2713 | a virtual PHI before we ever reach a backedge to cross. |
| 2714 | We can skip multiple defs as long as they are from the same |
| 2715 | value though. */ |
| 2716 | if (data->same_val |
| 2717 | && !operand_equal_p (data->same_val, rhs)) |
| 2718 | ; |
| 2719 | else if (CONSTANT_CLASS_P (rhs)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (rhs)->base.code))] == tcc_constant)) |
| 2720 | { |
| 2721 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 2722 | { |
| 2723 | fprintf (dump_file, |
| 2724 | "Skipping possible redundant definition "); |
| 2725 | print_gimple_stmt (dump_file, def_stmt, 0); |
| 2726 | } |
| 2727 | /* Delay the actual compare of the values to the end of the walk |
| 2728 | but do not update last_vuse from here. */ |
| 2729 | data->last_vuse_ptr = NULLnullptr; |
| 2730 | data->same_val = rhs; |
| 2731 | return NULLnullptr; |
| 2732 | } |
| 2733 | else |
| 2734 | { |
| 2735 | tree *saved_last_vuse_ptr = data->last_vuse_ptr; |
| 2736 | /* Do not update last_vuse_ptr in vn_reference_lookup_2. */ |
| 2737 | data->last_vuse_ptr = NULLnullptr; |
| 2738 | tree saved_vuse = vr->vuse; |
| 2739 | hashval_t saved_hashcode = vr->hashcode; |
| 2740 | void *res = vn_reference_lookup_2 (ref, gimple_vuse (def_stmt), |
| 2741 | data); |
| 2742 | /* Need to restore vr->vuse and vr->hashcode. */ |
| 2743 | vr->vuse = saved_vuse; |
| 2744 | vr->hashcode = saved_hashcode; |
| 2745 | data->last_vuse_ptr = saved_last_vuse_ptr; |
| 2746 | if (res && res != (void *)-1) |
| 2747 | { |
| 2748 | vn_reference_t vnresult = (vn_reference_t) res; |
| 2749 | if (TREE_CODE (rhs)((enum tree_code) (rhs)->base.code) == SSA_NAME) |
| 2750 | rhs = SSA_VAL (rhs); |
| 2751 | if (vnresult->result |
| 2752 | && operand_equal_p (vnresult->result, rhs, 0)) |
| 2753 | return res; |
| 2754 | } |
| 2755 | } |
| 2756 | } |
| 2757 | } |
| 2758 | else if (*disambiguate_only <= TR_VALUEIZE_AND_DISAMBIGUATE |
| 2759 | && gimple_call_builtin_p (def_stmt, BUILT_IN_NORMAL) |
| 2760 | && gimple_call_num_args (def_stmt) <= 4) |
| 2761 | { |
| 2762 | /* For builtin calls valueize its arguments and call the |
| 2763 | alias oracle again. Valueization may improve points-to |
| 2764 | info of pointers and constify size and position arguments. |
| 2765 | Originally this was motivated by PR61034 which has |
| 2766 | conditional calls to free falsely clobbering ref because |
| 2767 | of imprecise points-to info of the argument. */ |
| 2768 | tree oldargs[4]; |
| 2769 | bool valueized_anything = false; |
| 2770 | for (unsigned i = 0; i < gimple_call_num_args (def_stmt); ++i) |
| 2771 | { |
| 2772 | oldargs[i] = gimple_call_arg (def_stmt, i); |
| 2773 | tree val = vn_valueize (oldargs[i]); |
| 2774 | if (val != oldargs[i]) |
| 2775 | { |
| 2776 | gimple_call_set_arg (def_stmt, i, val); |
| 2777 | valueized_anything = true; |
| 2778 | } |
| 2779 | } |
| 2780 | if (valueized_anything) |
| 2781 | { |
| 2782 | bool res = call_may_clobber_ref_p_1 (as_a <gcall *> (def_stmt), |
| 2783 | ref, data->tbaa_p); |
| 2784 | for (unsigned i = 0; i < gimple_call_num_args (def_stmt); ++i) |
| 2785 | gimple_call_set_arg (def_stmt, i, oldargs[i]); |
| 2786 | if (!res) |
| 2787 | { |
| 2788 | *disambiguate_only = TR_VALUEIZE_AND_DISAMBIGUATE; |
| 2789 | return NULLnullptr; |
| 2790 | } |
| 2791 | } |
| 2792 | } |
| 2793 | |
| 2794 | if (*disambiguate_only > TR_TRANSLATE) |
| 2795 | return (void *)-1; |
| 2796 | |
| 2797 | /* If we cannot constrain the size of the reference we cannot |
| 2798 | test if anything kills it. */ |
| 2799 | if (!ref->max_size_known_p ()) |
| 2800 | return (void *)-1; |
| 2801 | |
| 2802 | poly_int64 offset = ref->offset; |
| 2803 | poly_int64 maxsize = ref->max_size; |
| 2804 | |
| 2805 | /* def_stmt may-defs *ref. See if we can derive a value for *ref |
| 2806 | from that definition. |
| 2807 | 1) Memset. */ |
| 2808 | if (is_gimple_reg_type (vr->type) |
| 2809 | && (gimple_call_builtin_p (def_stmt, BUILT_IN_MEMSET) |
| 2810 | || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMSET_CHK)) |
| 2811 | && (integer_zerop (gimple_call_arg (def_stmt, 1)) |
| 2812 | || ((TREE_CODE (gimple_call_arg (def_stmt, 1))((enum tree_code) (gimple_call_arg (def_stmt, 1))->base.code ) == INTEGER_CST |
| 2813 | || (INTEGRAL_TYPE_P (vr->type)(((enum tree_code) (vr->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr->type)->base.code) == INTEGER_TYPE ) && known_eq (ref->size, 8)(!maybe_ne (ref->size, 8)))) |
| 2814 | && CHAR_BIT8 == 8 |
| 2815 | && BITS_PER_UNIT(8) == 8 |
| 2816 | && BYTES_BIG_ENDIAN0 == WORDS_BIG_ENDIAN0 |
| 2817 | && offset.is_constant (&offseti) |
| 2818 | && ref->size.is_constant (&sizei) |
| 2819 | && (offseti % BITS_PER_UNIT(8) == 0 |
| 2820 | || TREE_CODE (gimple_call_arg (def_stmt, 1))((enum tree_code) (gimple_call_arg (def_stmt, 1))->base.code ) == INTEGER_CST))) |
| 2821 | && (poly_int_tree_p (gimple_call_arg (def_stmt, 2)) |
| 2822 | || (TREE_CODE (gimple_call_arg (def_stmt, 2))((enum tree_code) (gimple_call_arg (def_stmt, 2))->base.code ) == SSA_NAME |
| 2823 | && poly_int_tree_p (SSA_VAL (gimple_call_arg (def_stmt, 2))))) |
| 2824 | && (TREE_CODE (gimple_call_arg (def_stmt, 0))((enum tree_code) (gimple_call_arg (def_stmt, 0))->base.code ) == ADDR_EXPR |
| 2825 | || TREE_CODE (gimple_call_arg (def_stmt, 0))((enum tree_code) (gimple_call_arg (def_stmt, 0))->base.code ) == SSA_NAME)) |
| 2826 | { |
| 2827 | tree base2; |
| 2828 | poly_int64 offset2, size2, maxsize2; |
| 2829 | bool reverse; |
| 2830 | tree ref2 = gimple_call_arg (def_stmt, 0); |
| 2831 | if (TREE_CODE (ref2)((enum tree_code) (ref2)->base.code) == SSA_NAME) |
| 2832 | { |
| 2833 | ref2 = SSA_VAL (ref2); |
| 2834 | if (TREE_CODE (ref2)((enum tree_code) (ref2)->base.code) == SSA_NAME |
| 2835 | && (TREE_CODE (base)((enum tree_code) (base)->base.code) != MEM_REF |
| 2836 | || TREE_OPERAND (base, 0)(*((const_cast<tree*> (tree_operand_check ((base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2836, __FUNCTION__))))) != ref2)) |
| 2837 | { |
| 2838 | gimple *def_stmt = SSA_NAME_DEF_STMT (ref2)(tree_check ((ref2), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2838, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt; |
| 2839 | if (gimple_assign_single_p (def_stmt) |
| 2840 | && gimple_assign_rhs_code (def_stmt) == ADDR_EXPR) |
| 2841 | ref2 = gimple_assign_rhs1 (def_stmt); |
| 2842 | } |
| 2843 | } |
| 2844 | if (TREE_CODE (ref2)((enum tree_code) (ref2)->base.code) == ADDR_EXPR) |
| 2845 | { |
| 2846 | ref2 = TREE_OPERAND (ref2, 0)(*((const_cast<tree*> (tree_operand_check ((ref2), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2846, __FUNCTION__))))); |
| 2847 | base2 = get_ref_base_and_extent (ref2, &offset2, &size2, &maxsize2, |
| 2848 | &reverse); |
| 2849 | if (!known_size_p (maxsize2) |
| 2850 | || !known_eq (maxsize2, size2)(!maybe_ne (maxsize2, size2)) |
| 2851 | || !operand_equal_p (base, base2, OEP_ADDRESS_OF)) |
| 2852 | return (void *)-1; |
| 2853 | } |
| 2854 | else if (TREE_CODE (ref2)((enum tree_code) (ref2)->base.code) == SSA_NAME) |
| 2855 | { |
| 2856 | poly_int64 soff; |
| 2857 | if (TREE_CODE (base)((enum tree_code) (base)->base.code) != MEM_REF |
| 2858 | || !(mem_ref_offset (base) |
| 2859 | << LOG2_BITS_PER_UNIT3).to_shwi (&soff)) |
| 2860 | return (void *)-1; |
| 2861 | offset += soff; |
| 2862 | offset2 = 0; |
| 2863 | if (TREE_OPERAND (base, 0)(*((const_cast<tree*> (tree_operand_check ((base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2863, __FUNCTION__))))) != ref2) |
| 2864 | { |
| 2865 | gimple *def = SSA_NAME_DEF_STMT (ref2)(tree_check ((ref2), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2865, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt; |
| 2866 | if (is_gimple_assign (def) |
| 2867 | && gimple_assign_rhs_code (def) == POINTER_PLUS_EXPR |
| 2868 | && gimple_assign_rhs1 (def) == TREE_OPERAND (base, 0)(*((const_cast<tree*> (tree_operand_check ((base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2868, __FUNCTION__))))) |
| 2869 | && poly_int_tree_p (gimple_assign_rhs2 (def))) |
| 2870 | { |
| 2871 | tree rhs2 = gimple_assign_rhs2 (def); |
| 2872 | if (!(poly_offset_int::from (wi::to_poly_wide (rhs2), |
| 2873 | SIGNED) |
| 2874 | << LOG2_BITS_PER_UNIT3).to_shwi (&offset2)) |
| 2875 | return (void *)-1; |
| 2876 | ref2 = gimple_assign_rhs1 (def); |
| 2877 | if (TREE_CODE (ref2)((enum tree_code) (ref2)->base.code) == SSA_NAME) |
| 2878 | ref2 = SSA_VAL (ref2); |
| 2879 | } |
| 2880 | else |
| 2881 | return (void *)-1; |
| 2882 | } |
| 2883 | } |
| 2884 | else |
| 2885 | return (void *)-1; |
| 2886 | tree len = gimple_call_arg (def_stmt, 2); |
| 2887 | HOST_WIDE_INTlong leni, offset2i; |
| 2888 | if (TREE_CODE (len)((enum tree_code) (len)->base.code) == SSA_NAME) |
| 2889 | len = SSA_VAL (len); |
| 2890 | /* Sometimes the above trickery is smarter than alias analysis. Take |
| 2891 | advantage of that. */ |
| 2892 | if (!ranges_maybe_overlap_p (offset, maxsize, offset2, |
| 2893 | (wi::to_poly_offset (len) |
| 2894 | << LOG2_BITS_PER_UNIT3))) |
| 2895 | return NULLnullptr; |
| 2896 | if (data->partial_defs.is_empty () |
| 2897 | && known_subrange_p (offset, maxsize, offset2, |
| 2898 | wi::to_poly_offset (len) << LOG2_BITS_PER_UNIT3)) |
| 2899 | { |
| 2900 | tree val; |
| 2901 | if (integer_zerop (gimple_call_arg (def_stmt, 1))) |
| 2902 | val = build_zero_cst (vr->type); |
| 2903 | else if (INTEGRAL_TYPE_P (vr->type)(((enum tree_code) (vr->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr->type)->base.code) == INTEGER_TYPE ) |
| 2904 | && known_eq (ref->size, 8)(!maybe_ne (ref->size, 8)) |
| 2905 | && offseti % BITS_PER_UNIT(8) == 0) |
| 2906 | { |
| 2907 | gimple_match_op res_op (gimple_match_cond::UNCOND, NOP_EXPR, |
| 2908 | vr->type, gimple_call_arg (def_stmt, 1)); |
| 2909 | val = vn_nary_build_or_lookup (&res_op); |
| 2910 | if (!val |
| 2911 | || (TREE_CODE (val)((enum tree_code) (val)->base.code) == SSA_NAME |
| 2912 | && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (val)(tree_check ((val), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2912, __FUNCTION__, (SSA_NAME)))->base.asm_written_flag)) |
| 2913 | return (void *)-1; |
| 2914 | } |
| 2915 | else |
| 2916 | { |
| 2917 | unsigned buflen = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (vr->type))((unsigned long) (*tree_int_cst_elt_check ((((tree_class_check ((vr->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2917, __FUNCTION__))->type_common.size_unit)), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2917, __FUNCTION__))) + 1; |
| 2918 | if (INTEGRAL_TYPE_P (vr->type)(((enum tree_code) (vr->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr->type)->base.code) == INTEGER_TYPE )) |
| 2919 | buflen = GET_MODE_SIZE (SCALAR_INT_TYPE_MODE (vr->type)(as_a <scalar_int_mode> ((tree_class_check ((vr->type ), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2919, __FUNCTION__))->type_common.mode))) + 1; |
| 2920 | unsigned char *buf = XALLOCAVEC (unsigned char, buflen)((unsigned char *) __builtin_alloca(sizeof (unsigned char) * ( buflen))); |
| 2921 | memset (buf, TREE_INT_CST_LOW (gimple_call_arg (def_stmt, 1))((unsigned long) (*tree_int_cst_elt_check ((gimple_call_arg ( def_stmt, 1)), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2921, __FUNCTION__))), |
| 2922 | buflen); |
| 2923 | if (BYTES_BIG_ENDIAN0) |
| 2924 | { |
| 2925 | unsigned int amnt |
| 2926 | = (((unsigned HOST_WIDE_INTlong) offseti + sizei) |
| 2927 | % BITS_PER_UNIT(8)); |
| 2928 | if (amnt) |
| 2929 | { |
| 2930 | shift_bytes_in_array_right (buf, buflen, |
| 2931 | BITS_PER_UNIT(8) - amnt); |
| 2932 | buf++; |
| 2933 | buflen--; |
| 2934 | } |
| 2935 | } |
| 2936 | else if (offseti % BITS_PER_UNIT(8) != 0) |
| 2937 | { |
| 2938 | unsigned int amnt |
| 2939 | = BITS_PER_UNIT(8) - ((unsigned HOST_WIDE_INTlong) offseti |
| 2940 | % BITS_PER_UNIT(8)); |
| 2941 | shift_bytes_in_array_left (buf, buflen, amnt); |
| 2942 | buf++; |
| 2943 | buflen--; |
| 2944 | } |
| 2945 | val = native_interpret_expr (vr->type, buf, buflen); |
| 2946 | if (!val) |
| 2947 | return (void *)-1; |
| 2948 | } |
| 2949 | return data->finish (0, 0, val); |
| 2950 | } |
| 2951 | /* For now handle clearing memory with partial defs. */ |
| 2952 | else if (known_eq (ref->size, maxsize)(!maybe_ne (ref->size, maxsize)) |
| 2953 | && integer_zerop (gimple_call_arg (def_stmt, 1)) |
| 2954 | && tree_fits_poly_int64_p (len) |
| 2955 | && tree_to_poly_int64 (len).is_constant (&leni) |
| 2956 | && leni <= INTTYPE_MAXIMUM (HOST_WIDE_INT)((long) (~ (long) 0 - ((long) ((! ((long) 0 < (long) -1)) ? (long) 1 << (sizeof (long) * 8 - 1) : (long) 0)))) / BITS_PER_UNIT(8) |
| 2957 | && offset.is_constant (&offseti) |
| 2958 | && offset2.is_constant (&offset2i) |
| 2959 | && maxsize.is_constant (&maxsizei) |
| 2960 | && ranges_known_overlap_p (offseti, maxsizei, offset2i, |
| 2961 | leni << LOG2_BITS_PER_UNIT3)) |
| 2962 | { |
| 2963 | pd_data pd; |
| 2964 | pd.rhs = build_constructor (NULL_TREE(tree) nullptr, NULLnullptr); |
| 2965 | pd.rhs_off = 0; |
| 2966 | pd.offset = offset2i; |
| 2967 | pd.size = leni << LOG2_BITS_PER_UNIT3; |
| 2968 | return data->push_partial_def (pd, 0, 0, offseti, maxsizei); |
| 2969 | } |
| 2970 | } |
| 2971 | |
| 2972 | /* 2) Assignment from an empty CONSTRUCTOR. */ |
| 2973 | else if (is_gimple_reg_type (vr->type) |
| 2974 | && gimple_assign_single_p (def_stmt) |
| 2975 | && gimple_assign_rhs_code (def_stmt) == CONSTRUCTOR |
| 2976 | && CONSTRUCTOR_NELTS (gimple_assign_rhs1 (def_stmt))(vec_safe_length (((tree_check ((gimple_assign_rhs1 (def_stmt )), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2976, __FUNCTION__, (CONSTRUCTOR)))->constructor.elts))) == 0) |
| 2977 | { |
| 2978 | tree base2; |
| 2979 | poly_int64 offset2, size2, maxsize2; |
| 2980 | HOST_WIDE_INTlong offset2i, size2i; |
| 2981 | gcc_assert (lhs_ref_ok)((void)(!(lhs_ref_ok) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 2981, __FUNCTION__), 0 : 0)); |
| 2982 | base2 = ao_ref_base (&lhs_ref); |
| 2983 | offset2 = lhs_ref.offset; |
| 2984 | size2 = lhs_ref.size; |
| 2985 | maxsize2 = lhs_ref.max_size; |
| 2986 | if (known_size_p (maxsize2) |
| 2987 | && known_eq (maxsize2, size2)(!maybe_ne (maxsize2, size2)) |
| 2988 | && adjust_offsets_for_equal_base_address (base, &offset, |
| 2989 | base2, &offset2)) |
| 2990 | { |
| 2991 | if (data->partial_defs.is_empty () |
| 2992 | && known_subrange_p (offset, maxsize, offset2, size2)) |
| 2993 | { |
| 2994 | /* While technically undefined behavior do not optimize |
| 2995 | a full read from a clobber. */ |
| 2996 | if (gimple_clobber_p (def_stmt)) |
| 2997 | return (void *)-1; |
| 2998 | tree val = build_zero_cst (vr->type); |
| 2999 | return data->finish (ao_ref_alias_set (&lhs_ref), |
| 3000 | ao_ref_base_alias_set (&lhs_ref), val); |
| 3001 | } |
| 3002 | else if (known_eq (ref->size, maxsize)(!maybe_ne (ref->size, maxsize)) |
| 3003 | && maxsize.is_constant (&maxsizei) |
| 3004 | && offset.is_constant (&offseti) |
| 3005 | && offset2.is_constant (&offset2i) |
| 3006 | && size2.is_constant (&size2i) |
| 3007 | && ranges_known_overlap_p (offseti, maxsizei, |
| 3008 | offset2i, size2i)) |
| 3009 | { |
| 3010 | /* Let clobbers be consumed by the partial-def tracker |
| 3011 | which can choose to ignore them if they are shadowed |
| 3012 | by a later def. */ |
| 3013 | pd_data pd; |
| 3014 | pd.rhs = gimple_assign_rhs1 (def_stmt); |
| 3015 | pd.rhs_off = 0; |
| 3016 | pd.offset = offset2i; |
| 3017 | pd.size = size2i; |
| 3018 | return data->push_partial_def (pd, ao_ref_alias_set (&lhs_ref), |
| 3019 | ao_ref_base_alias_set (&lhs_ref), |
| 3020 | offseti, maxsizei); |
| 3021 | } |
| 3022 | } |
| 3023 | } |
| 3024 | |
| 3025 | /* 3) Assignment from a constant. We can use folds native encode/interpret |
| 3026 | routines to extract the assigned bits. */ |
| 3027 | else if (known_eq (ref->size, maxsize)(!maybe_ne (ref->size, maxsize)) |
| 3028 | && is_gimple_reg_type (vr->type) |
| 3029 | && !reverse_storage_order_for_component_p (vr->operands) |
| 3030 | && !contains_storage_order_barrier_p (vr->operands) |
| 3031 | && gimple_assign_single_p (def_stmt) |
| 3032 | && CHAR_BIT8 == 8 |
| 3033 | && BITS_PER_UNIT(8) == 8 |
| 3034 | && BYTES_BIG_ENDIAN0 == WORDS_BIG_ENDIAN0 |
| 3035 | /* native_encode and native_decode operate on arrays of bytes |
| 3036 | and so fundamentally need a compile-time size and offset. */ |
| 3037 | && maxsize.is_constant (&maxsizei) |
| 3038 | && offset.is_constant (&offseti) |
| 3039 | && (is_gimple_min_invariant (gimple_assign_rhs1 (def_stmt)) |
| 3040 | || (TREE_CODE (gimple_assign_rhs1 (def_stmt))((enum tree_code) (gimple_assign_rhs1 (def_stmt))->base.code ) == SSA_NAME |
| 3041 | && is_gimple_min_invariant (SSA_VAL (gimple_assign_rhs1 (def_stmt)))))) |
| 3042 | { |
| 3043 | tree lhs = gimple_assign_lhs (def_stmt); |
| 3044 | tree base2; |
| 3045 | poly_int64 offset2, size2, maxsize2; |
| 3046 | HOST_WIDE_INTlong offset2i, size2i; |
| 3047 | bool reverse; |
| 3048 | gcc_assert (lhs_ref_ok)((void)(!(lhs_ref_ok) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3048, __FUNCTION__), 0 : 0)); |
| 3049 | base2 = ao_ref_base (&lhs_ref); |
| 3050 | offset2 = lhs_ref.offset; |
| 3051 | size2 = lhs_ref.size; |
| 3052 | maxsize2 = lhs_ref.max_size; |
| 3053 | reverse = reverse_storage_order_for_component_p (lhs); |
| 3054 | if (base2 |
| 3055 | && !reverse |
| 3056 | && !storage_order_barrier_p (lhs) |
| 3057 | && known_eq (maxsize2, size2)(!maybe_ne (maxsize2, size2)) |
| 3058 | && adjust_offsets_for_equal_base_address (base, &offset, |
| 3059 | base2, &offset2) |
| 3060 | && offset.is_constant (&offseti) |
| 3061 | && offset2.is_constant (&offset2i) |
| 3062 | && size2.is_constant (&size2i)) |
| 3063 | { |
| 3064 | if (data->partial_defs.is_empty () |
| 3065 | && known_subrange_p (offseti, maxsizei, offset2, size2)) |
| 3066 | { |
| 3067 | /* We support up to 512-bit values (for V8DFmode). */ |
| 3068 | unsigned char buffer[65]; |
| 3069 | int len; |
| 3070 | |
| 3071 | tree rhs = gimple_assign_rhs1 (def_stmt); |
| 3072 | if (TREE_CODE (rhs)((enum tree_code) (rhs)->base.code) == SSA_NAME) |
| 3073 | rhs = SSA_VAL (rhs); |
| 3074 | len = native_encode_expr (rhs, |
| 3075 | buffer, sizeof (buffer) - 1, |
| 3076 | (offseti - offset2i) / BITS_PER_UNIT(8)); |
| 3077 | if (len > 0 && len * BITS_PER_UNIT(8) >= maxsizei) |
| 3078 | { |
| 3079 | tree type = vr->type; |
| 3080 | unsigned char *buf = buffer; |
| 3081 | unsigned int amnt = 0; |
| 3082 | /* Make sure to interpret in a type that has a range |
| 3083 | covering the whole access size. */ |
| 3084 | if (INTEGRAL_TYPE_P (vr->type)(((enum tree_code) (vr->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr->type)->base.code) == INTEGER_TYPE ) |
| 3085 | && maxsizei != TYPE_PRECISION (vr->type)((tree_class_check ((vr->type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3085, __FUNCTION__))->type_common.precision)) |
| 3086 | type = build_nonstandard_integer_type (maxsizei, |
| 3087 | TYPE_UNSIGNED (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3087, __FUNCTION__))->base.u.bits.unsigned_flag)); |
| 3088 | if (BYTES_BIG_ENDIAN0) |
| 3089 | { |
| 3090 | /* For big-endian native_encode_expr stored the rhs |
| 3091 | such that the LSB of it is the LSB of buffer[len - 1]. |
| 3092 | That bit is stored into memory at position |
| 3093 | offset2 + size2 - 1, i.e. in byte |
| 3094 | base + (offset2 + size2 - 1) / BITS_PER_UNIT. |
| 3095 | E.g. for offset2 1 and size2 14, rhs -1 and memory |
| 3096 | previously cleared that is: |
| 3097 | 0 1 |
| 3098 | 01111111|11111110 |
| 3099 | Now, if we want to extract offset 2 and size 12 from |
| 3100 | it using native_interpret_expr (which actually works |
| 3101 | for integral bitfield types in terms of byte size of |
| 3102 | the mode), the native_encode_expr stored the value |
| 3103 | into buffer as |
| 3104 | XX111111|11111111 |
| 3105 | and returned len 2 (the X bits are outside of |
| 3106 | precision). |
| 3107 | Let sz be maxsize / BITS_PER_UNIT if not extracting |
| 3108 | a bitfield, and GET_MODE_SIZE otherwise. |
| 3109 | We need to align the LSB of the value we want to |
| 3110 | extract as the LSB of buf[sz - 1]. |
| 3111 | The LSB from memory we need to read is at position |
| 3112 | offset + maxsize - 1. */ |
| 3113 | HOST_WIDE_INTlong sz = maxsizei / BITS_PER_UNIT(8); |
| 3114 | if (INTEGRAL_TYPE_P (type)(((enum tree_code) (type)->base.code) == ENUMERAL_TYPE || ( (enum tree_code) (type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (type)->base.code) == INTEGER_TYPE)) |
| 3115 | sz = GET_MODE_SIZE (SCALAR_INT_TYPE_MODE (type)(as_a <scalar_int_mode> ((tree_class_check ((type), (tcc_type ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3115, __FUNCTION__))->type_common.mode))); |
| 3116 | amnt = ((unsigned HOST_WIDE_INTlong) offset2i + size2i |
| 3117 | - offseti - maxsizei) % BITS_PER_UNIT(8); |
| 3118 | if (amnt) |
| 3119 | shift_bytes_in_array_right (buffer, len, amnt); |
| 3120 | amnt = ((unsigned HOST_WIDE_INTlong) offset2i + size2i |
| 3121 | - offseti - maxsizei - amnt) / BITS_PER_UNIT(8); |
| 3122 | if ((unsigned HOST_WIDE_INTlong) sz + amnt > (unsigned) len) |
| 3123 | len = 0; |
| 3124 | else |
| 3125 | { |
| 3126 | buf = buffer + len - sz - amnt; |
| 3127 | len -= (buf - buffer); |
| 3128 | } |
| 3129 | } |
| 3130 | else |
| 3131 | { |
| 3132 | amnt = ((unsigned HOST_WIDE_INTlong) offset2i |
| 3133 | - offseti) % BITS_PER_UNIT(8); |
| 3134 | if (amnt) |
| 3135 | { |
| 3136 | buffer[len] = 0; |
| 3137 | shift_bytes_in_array_left (buffer, len + 1, amnt); |
| 3138 | buf = buffer + 1; |
| 3139 | } |
| 3140 | } |
| 3141 | tree val = native_interpret_expr (type, buf, len); |
| 3142 | /* If we chop off bits because the types precision doesn't |
| 3143 | match the memory access size this is ok when optimizing |
| 3144 | reads but not when called from the DSE code during |
| 3145 | elimination. */ |
| 3146 | if (val |
| 3147 | && type != vr->type) |
| 3148 | { |
| 3149 | if (! int_fits_type_p (val, vr->type)) |
| 3150 | val = NULL_TREE(tree) nullptr; |
| 3151 | else |
| 3152 | val = fold_convert (vr->type, val)fold_convert_loc (((location_t) 0), vr->type, val); |
| 3153 | } |
| 3154 | |
| 3155 | if (val) |
| 3156 | return data->finish (ao_ref_alias_set (&lhs_ref), |
| 3157 | ao_ref_base_alias_set (&lhs_ref), val); |
| 3158 | } |
| 3159 | } |
| 3160 | else if (ranges_known_overlap_p (offseti, maxsizei, offset2i, |
| 3161 | size2i)) |
| 3162 | { |
| 3163 | pd_data pd; |
| 3164 | tree rhs = gimple_assign_rhs1 (def_stmt); |
| 3165 | if (TREE_CODE (rhs)((enum tree_code) (rhs)->base.code) == SSA_NAME) |
| 3166 | rhs = SSA_VAL (rhs); |
| 3167 | pd.rhs = rhs; |
| 3168 | pd.rhs_off = 0; |
| 3169 | pd.offset = offset2i; |
| 3170 | pd.size = size2i; |
| 3171 | return data->push_partial_def (pd, ao_ref_alias_set (&lhs_ref), |
| 3172 | ao_ref_base_alias_set (&lhs_ref), |
| 3173 | offseti, maxsizei); |
| 3174 | } |
| 3175 | } |
| 3176 | } |
| 3177 | |
| 3178 | /* 4) Assignment from an SSA name which definition we may be able |
| 3179 | to access pieces from or we can combine to a larger entity. */ |
| 3180 | else if (known_eq (ref->size, maxsize)(!maybe_ne (ref->size, maxsize)) |
| 3181 | && is_gimple_reg_type (vr->type) |
| 3182 | && !reverse_storage_order_for_component_p (vr->operands) |
| 3183 | && !contains_storage_order_barrier_p (vr->operands) |
| 3184 | && gimple_assign_single_p (def_stmt) |
| 3185 | && TREE_CODE (gimple_assign_rhs1 (def_stmt))((enum tree_code) (gimple_assign_rhs1 (def_stmt))->base.code ) == SSA_NAME) |
| 3186 | { |
| 3187 | tree lhs = gimple_assign_lhs (def_stmt); |
| 3188 | tree base2; |
| 3189 | poly_int64 offset2, size2, maxsize2; |
| 3190 | HOST_WIDE_INTlong offset2i, size2i, offseti; |
| 3191 | bool reverse; |
| 3192 | gcc_assert (lhs_ref_ok)((void)(!(lhs_ref_ok) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3192, __FUNCTION__), 0 : 0)); |
| 3193 | base2 = ao_ref_base (&lhs_ref); |
| 3194 | offset2 = lhs_ref.offset; |
| 3195 | size2 = lhs_ref.size; |
| 3196 | maxsize2 = lhs_ref.max_size; |
| 3197 | reverse = reverse_storage_order_for_component_p (lhs); |
| 3198 | tree def_rhs = gimple_assign_rhs1 (def_stmt); |
| 3199 | if (!reverse |
| 3200 | && !storage_order_barrier_p (lhs) |
| 3201 | && known_size_p (maxsize2) |
| 3202 | && known_eq (maxsize2, size2)(!maybe_ne (maxsize2, size2)) |
| 3203 | && adjust_offsets_for_equal_base_address (base, &offset, |
| 3204 | base2, &offset2)) |
| 3205 | { |
| 3206 | if (data->partial_defs.is_empty () |
| 3207 | && known_subrange_p (offset, maxsize, offset2, size2) |
| 3208 | /* ??? We can't handle bitfield precision extracts without |
| 3209 | either using an alternate type for the BIT_FIELD_REF and |
| 3210 | then doing a conversion or possibly adjusting the offset |
| 3211 | according to endianness. */ |
| 3212 | && (! INTEGRAL_TYPE_P (vr->type)(((enum tree_code) (vr->type)->base.code) == ENUMERAL_TYPE || ((enum tree_code) (vr->type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (vr->type)->base.code) == INTEGER_TYPE ) |
| 3213 | || known_eq (ref->size, TYPE_PRECISION (vr->type))(!maybe_ne (ref->size, ((tree_class_check ((vr->type), ( tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3213, __FUNCTION__))->type_common.precision)))) |
| 3214 | && multiple_p (ref->size, BITS_PER_UNIT(8))) |
| 3215 | { |
| 3216 | tree val = NULL_TREE(tree) nullptr; |
| 3217 | if (! INTEGRAL_TYPE_P (TREE_TYPE (def_rhs))(((enum tree_code) (((contains_struct_check ((def_rhs), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3217, __FUNCTION__))->typed.type))->base.code) == ENUMERAL_TYPE || ((enum tree_code) (((contains_struct_check ((def_rhs), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3217, __FUNCTION__))->typed.type))->base.code) == BOOLEAN_TYPE || ((enum tree_code) (((contains_struct_check ((def_rhs), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3217, __FUNCTION__))->typed.type))->base.code) == INTEGER_TYPE ) |
| 3218 | || type_has_mode_precision_p (TREE_TYPE (def_rhs)((contains_struct_check ((def_rhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3218, __FUNCTION__))->typed.type))) |
| 3219 | { |
| 3220 | gimple_match_op op (gimple_match_cond::UNCOND, |
| 3221 | BIT_FIELD_REF, vr->type, |
| 3222 | SSA_VAL (def_rhs), |
| 3223 | bitsize_int (ref->size)size_int_kind (ref->size, stk_bitsizetype), |
| 3224 | bitsize_int (offset - offset2)size_int_kind (offset - offset2, stk_bitsizetype)); |
| 3225 | val = vn_nary_build_or_lookup (&op); |
| 3226 | } |
| 3227 | else if (known_eq (ref->size, size2)(!maybe_ne (ref->size, size2))) |
| 3228 | { |
| 3229 | gimple_match_op op (gimple_match_cond::UNCOND, |
| 3230 | VIEW_CONVERT_EXPR, vr->type, |
| 3231 | SSA_VAL (def_rhs)); |
| 3232 | val = vn_nary_build_or_lookup (&op); |
| 3233 | } |
| 3234 | if (val |
| 3235 | && (TREE_CODE (val)((enum tree_code) (val)->base.code) != SSA_NAME |
| 3236 | || ! SSA_NAME_OCCURS_IN_ABNORMAL_PHI (val)(tree_check ((val), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3236, __FUNCTION__, (SSA_NAME)))->base.asm_written_flag)) |
| 3237 | return data->finish (ao_ref_alias_set (&lhs_ref), |
| 3238 | ao_ref_base_alias_set (&lhs_ref), val); |
| 3239 | } |
| 3240 | else if (maxsize.is_constant (&maxsizei) |
| 3241 | && offset.is_constant (&offseti) |
| 3242 | && offset2.is_constant (&offset2i) |
| 3243 | && size2.is_constant (&size2i) |
| 3244 | && ranges_known_overlap_p (offset, maxsize, offset2, size2)) |
| 3245 | { |
| 3246 | pd_data pd; |
| 3247 | pd.rhs = SSA_VAL (def_rhs); |
| 3248 | pd.rhs_off = 0; |
| 3249 | pd.offset = offset2i; |
| 3250 | pd.size = size2i; |
| 3251 | return data->push_partial_def (pd, ao_ref_alias_set (&lhs_ref), |
| 3252 | ao_ref_base_alias_set (&lhs_ref), |
| 3253 | offseti, maxsizei); |
| 3254 | } |
| 3255 | } |
| 3256 | } |
| 3257 | |
| 3258 | /* 4b) Assignment done via one of the vectorizer internal store |
| 3259 | functions where we may be able to access pieces from or we can |
| 3260 | combine to a larger entity. */ |
| 3261 | else if (known_eq (ref->size, maxsize)(!maybe_ne (ref->size, maxsize)) |
| 3262 | && is_gimple_reg_type (vr->type) |
| 3263 | && !reverse_storage_order_for_component_p (vr->operands) |
| 3264 | && !contains_storage_order_barrier_p (vr->operands) |
| 3265 | && is_gimple_call (def_stmt) |
| 3266 | && gimple_call_internal_p (def_stmt) |
| 3267 | && internal_store_fn_p (gimple_call_internal_fn (def_stmt))) |
| 3268 | { |
| 3269 | gcall *call = as_a <gcall *> (def_stmt); |
| 3270 | internal_fn fn = gimple_call_internal_fn (call); |
| 3271 | |
| 3272 | tree mask = NULL_TREE(tree) nullptr, len = NULL_TREE(tree) nullptr, bias = NULL_TREE(tree) nullptr; |
| 3273 | switch (fn) |
| 3274 | { |
| 3275 | case IFN_MASK_STORE: |
| 3276 | mask = gimple_call_arg (call, internal_fn_mask_index (fn)); |
| 3277 | mask = vn_valueize (mask); |
| 3278 | if (TREE_CODE (mask)((enum tree_code) (mask)->base.code) != VECTOR_CST) |
| 3279 | return (void *)-1; |
| 3280 | break; |
| 3281 | case IFN_LEN_STORE: |
| 3282 | len = gimple_call_arg (call, 2); |
| 3283 | bias = gimple_call_arg (call, 4); |
| 3284 | if (!tree_fits_uhwi_p (len) || !tree_fits_shwi_p (bias)) |
| 3285 | return (void *)-1; |
| 3286 | break; |
| 3287 | default: |
| 3288 | return (void *)-1; |
| 3289 | } |
| 3290 | tree def_rhs = gimple_call_arg (call, |
| 3291 | internal_fn_stored_value_index (fn)); |
| 3292 | def_rhs = vn_valueize (def_rhs); |
| 3293 | if (TREE_CODE (def_rhs)((enum tree_code) (def_rhs)->base.code) != VECTOR_CST) |
| 3294 | return (void *)-1; |
| 3295 | |
| 3296 | ao_ref_init_from_ptr_and_size (&lhs_ref, |
| 3297 | vn_valueize (gimple_call_arg (call, 0)), |
| 3298 | TYPE_SIZE_UNIT (TREE_TYPE (def_rhs))((tree_class_check ((((contains_struct_check ((def_rhs), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3298, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3298, __FUNCTION__))->type_common.size_unit)); |
| 3299 | tree base2; |
| 3300 | poly_int64 offset2, size2, maxsize2; |
| 3301 | HOST_WIDE_INTlong offset2i, size2i, offseti; |
| 3302 | base2 = ao_ref_base (&lhs_ref); |
| 3303 | offset2 = lhs_ref.offset; |
| 3304 | size2 = lhs_ref.size; |
| 3305 | maxsize2 = lhs_ref.max_size; |
| 3306 | if (known_size_p (maxsize2) |
| 3307 | && known_eq (maxsize2, size2)(!maybe_ne (maxsize2, size2)) |
| 3308 | && adjust_offsets_for_equal_base_address (base, &offset, |
| 3309 | base2, &offset2) |
| 3310 | && maxsize.is_constant (&maxsizei) |
| 3311 | && offset.is_constant (&offseti) |
| 3312 | && offset2.is_constant (&offset2i) |
| 3313 | && size2.is_constant (&size2i)) |
| 3314 | { |
| 3315 | if (!ranges_maybe_overlap_p (offset, maxsize, offset2, size2)) |
| 3316 | /* Poor-mans disambiguation. */ |
| 3317 | return NULLnullptr; |
| 3318 | else if (ranges_known_overlap_p (offset, maxsize, offset2, size2)) |
| 3319 | { |
| 3320 | pd_data pd; |
| 3321 | pd.rhs = def_rhs; |
| 3322 | tree aa = gimple_call_arg (call, 1); |
| 3323 | alias_set_type set = get_deref_alias_set (TREE_TYPE (aa)((contains_struct_check ((aa), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3323, __FUNCTION__))->typed.type)); |
| 3324 | tree vectype = TREE_TYPE (def_rhs)((contains_struct_check ((def_rhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3324, __FUNCTION__))->typed.type); |
| 3325 | unsigned HOST_WIDE_INTlong elsz |
| 3326 | = tree_to_uhwi (TYPE_SIZE (TREE_TYPE (vectype))((tree_class_check ((((contains_struct_check ((vectype), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3326, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3326, __FUNCTION__))->type_common.size)); |
| 3327 | if (mask) |
| 3328 | { |
| 3329 | HOST_WIDE_INTlong start = 0, len = 0; |
| 3330 | unsigned mask_idx = 0; |
| 3331 | do |
| 3332 | { |
| 3333 | if (integer_zerop (VECTOR_CST_ELT (mask, mask_idx)vector_cst_elt (mask, mask_idx))) |
| 3334 | { |
| 3335 | if (len != 0) |
| 3336 | { |
| 3337 | pd.rhs_off = start; |
| 3338 | pd.offset = offset2i + start; |
| 3339 | pd.size = len; |
| 3340 | if (ranges_known_overlap_p |
| 3341 | (offset, maxsize, pd.offset, pd.size)) |
| 3342 | { |
| 3343 | void *res = data->push_partial_def |
| 3344 | (pd, set, set, offseti, maxsizei); |
| 3345 | if (res != NULLnullptr) |
| 3346 | return res; |
| 3347 | } |
| 3348 | } |
| 3349 | start = (mask_idx + 1) * elsz; |
| 3350 | len = 0; |
| 3351 | } |
| 3352 | else |
| 3353 | len += elsz; |
| 3354 | mask_idx++; |
| 3355 | } |
| 3356 | while (known_lt (mask_idx, TYPE_VECTOR_SUBPARTS (vectype))(!maybe_le (TYPE_VECTOR_SUBPARTS (vectype), mask_idx))); |
| 3357 | if (len != 0) |
| 3358 | { |
| 3359 | pd.rhs_off = start; |
| 3360 | pd.offset = offset2i + start; |
| 3361 | pd.size = len; |
| 3362 | if (ranges_known_overlap_p (offset, maxsize, |
| 3363 | pd.offset, pd.size)) |
| 3364 | return data->push_partial_def (pd, set, set, |
| 3365 | offseti, maxsizei); |
| 3366 | } |
| 3367 | } |
| 3368 | else if (fn == IFN_LEN_STORE) |
| 3369 | { |
| 3370 | pd.offset = offset2i; |
| 3371 | pd.size = (tree_to_uhwi (len) |
| 3372 | + -tree_to_shwi (bias)) * BITS_PER_UNIT(8); |
| 3373 | if (BYTES_BIG_ENDIAN0) |
| 3374 | pd.rhs_off = pd.size - tree_to_uhwi (TYPE_SIZE (vectype)((tree_class_check ((vectype), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3374, __FUNCTION__))->type_common.size)); |
| 3375 | else |
| 3376 | pd.rhs_off = 0; |
| 3377 | if (ranges_known_overlap_p (offset, maxsize, |
| 3378 | pd.offset, pd.size)) |
| 3379 | return data->push_partial_def (pd, set, set, |
| 3380 | offseti, maxsizei); |
| 3381 | } |
| 3382 | else |
| 3383 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3383, __FUNCTION__)); |
| 3384 | return NULLnullptr; |
| 3385 | } |
| 3386 | } |
| 3387 | } |
| 3388 | |
| 3389 | /* 5) For aggregate copies translate the reference through them if |
| 3390 | the copy kills ref. */ |
| 3391 | else if (data->vn_walk_kind == VN_WALKREWRITE |
| 3392 | && gimple_assign_single_p (def_stmt) |
| 3393 | && (DECL_P (gimple_assign_rhs1 (def_stmt))(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (gimple_assign_rhs1 (def_stmt))->base.code))] == tcc_declaration ) |
| 3394 | || TREE_CODE (gimple_assign_rhs1 (def_stmt))((enum tree_code) (gimple_assign_rhs1 (def_stmt))->base.code ) == MEM_REF |
| 3395 | || handled_component_p (gimple_assign_rhs1 (def_stmt)))) |
| 3396 | { |
| 3397 | tree base2; |
| 3398 | int i, j, k; |
| 3399 | auto_vec<vn_reference_op_s> rhs; |
| 3400 | vn_reference_op_t vro; |
| 3401 | ao_ref r; |
| 3402 | |
| 3403 | gcc_assert (lhs_ref_ok)((void)(!(lhs_ref_ok) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3403, __FUNCTION__), 0 : 0)); |
| 3404 | |
| 3405 | /* See if the assignment kills REF. */ |
| 3406 | base2 = ao_ref_base (&lhs_ref); |
| 3407 | if (!lhs_ref.max_size_known_p () |
| 3408 | || (base != base2 |
| 3409 | && (TREE_CODE (base)((enum tree_code) (base)->base.code) != MEM_REF |
| 3410 | || TREE_CODE (base2)((enum tree_code) (base2)->base.code) != MEM_REF |
| 3411 | || TREE_OPERAND (base, 0)(*((const_cast<tree*> (tree_operand_check ((base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3411, __FUNCTION__))))) != TREE_OPERAND (base2, 0)(*((const_cast<tree*> (tree_operand_check ((base2), (0) , "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3411, __FUNCTION__))))) |
| 3412 | || !tree_int_cst_equal (TREE_OPERAND (base, 1)(*((const_cast<tree*> (tree_operand_check ((base), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3412, __FUNCTION__))))), |
| 3413 | TREE_OPERAND (base2, 1)(*((const_cast<tree*> (tree_operand_check ((base2), (1) , "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3413, __FUNCTION__)))))))) |
| 3414 | || !stmt_kills_ref_p (def_stmt, ref)) |
| 3415 | return (void *)-1; |
| 3416 | |
| 3417 | /* Find the common base of ref and the lhs. lhs_ops already |
| 3418 | contains valueized operands for the lhs. */ |
| 3419 | i = vr->operands.length () - 1; |
| 3420 | j = lhs_ops.length () - 1; |
| 3421 | while (j >= 0 && i >= 0 |
| 3422 | && vn_reference_op_eq (&vr->operands[i], &lhs_ops[j])) |
| 3423 | { |
| 3424 | i--; |
| 3425 | j--; |
| 3426 | } |
| 3427 | |
| 3428 | /* ??? The innermost op should always be a MEM_REF and we already |
| 3429 | checked that the assignment to the lhs kills vr. Thus for |
| 3430 | aggregate copies using char[] types the vn_reference_op_eq |
| 3431 | may fail when comparing types for compatibility. But we really |
| 3432 | don't care here - further lookups with the rewritten operands |
| 3433 | will simply fail if we messed up types too badly. */ |
| 3434 | poly_int64 extra_off = 0; |
| 3435 | if (j == 0 && i >= 0 |
| 3436 | && lhs_ops[0].opcode == MEM_REF |
| 3437 | && maybe_ne (lhs_ops[0].off, -1)) |
| 3438 | { |
| 3439 | if (known_eq (lhs_ops[0].off, vr->operands[i].off)(!maybe_ne (lhs_ops[0].off, vr->operands[i].off))) |
| 3440 | i--, j--; |
| 3441 | else if (vr->operands[i].opcode == MEM_REF |
| 3442 | && maybe_ne (vr->operands[i].off, -1)) |
| 3443 | { |
| 3444 | extra_off = vr->operands[i].off - lhs_ops[0].off; |
| 3445 | i--, j--; |
| 3446 | } |
| 3447 | } |
| 3448 | |
| 3449 | /* i now points to the first additional op. |
| 3450 | ??? LHS may not be completely contained in VR, one or more |
| 3451 | VIEW_CONVERT_EXPRs could be in its way. We could at least |
| 3452 | try handling outermost VIEW_CONVERT_EXPRs. */ |
| 3453 | if (j != -1) |
| 3454 | return (void *)-1; |
| 3455 | |
| 3456 | /* Punt if the additional ops contain a storage order barrier. */ |
| 3457 | for (k = i; k >= 0; k--) |
| 3458 | { |
| 3459 | vro = &vr->operands[k]; |
| 3460 | if (vro->opcode == VIEW_CONVERT_EXPR && vro->reverse) |
| 3461 | return (void *)-1; |
| 3462 | } |
| 3463 | |
| 3464 | /* Now re-write REF to be based on the rhs of the assignment. */ |
| 3465 | tree rhs1 = gimple_assign_rhs1 (def_stmt); |
| 3466 | copy_reference_ops_from_ref (rhs1, &rhs); |
| 3467 | |
| 3468 | /* Apply an extra offset to the inner MEM_REF of the RHS. */ |
| 3469 | bool force_no_tbaa = false; |
| 3470 | if (maybe_ne (extra_off, 0)) |
| 3471 | { |
| 3472 | if (rhs.length () < 2) |
| 3473 | return (void *)-1; |
| 3474 | int ix = rhs.length () - 2; |
| 3475 | if (rhs[ix].opcode != MEM_REF |
| 3476 | || known_eq (rhs[ix].off, -1)(!maybe_ne (rhs[ix].off, -1))) |
| 3477 | return (void *)-1; |
| 3478 | rhs[ix].off += extra_off; |
| 3479 | rhs[ix].op0 = int_const_binop (PLUS_EXPR, rhs[ix].op0, |
| 3480 | build_int_cst (TREE_TYPE (rhs[ix].op0)((contains_struct_check ((rhs[ix].op0), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3480, __FUNCTION__))->typed.type), |
| 3481 | extra_off)); |
| 3482 | /* When we have offsetted the RHS, reading only parts of it, |
| 3483 | we can no longer use the original TBAA type, force alias-set |
| 3484 | zero. */ |
| 3485 | force_no_tbaa = true; |
| 3486 | } |
| 3487 | |
| 3488 | /* Save the operands since we need to use the original ones for |
| 3489 | the hash entry we use. */ |
| 3490 | if (!data->saved_operands.exists ()) |
| 3491 | data->saved_operands = vr->operands.copy (); |
| 3492 | |
| 3493 | /* We need to pre-pend vr->operands[0..i] to rhs. */ |
| 3494 | vec<vn_reference_op_s> old = vr->operands; |
| 3495 | if (i + 1 + rhs.length () > vr->operands.length ()) |
| 3496 | vr->operands.safe_grow (i + 1 + rhs.length (), true); |
| 3497 | else |
| 3498 | vr->operands.truncate (i + 1 + rhs.length ()); |
| 3499 | FOR_EACH_VEC_ELT (rhs, j, vro)for (j = 0; (rhs).iterate ((j), &(vro)); ++(j)) |
| 3500 | vr->operands[i + 1 + j] = *vro; |
| 3501 | valueize_refs (&vr->operands); |
| 3502 | if (old == shared_lookup_references) |
| 3503 | shared_lookup_references = vr->operands; |
| 3504 | vr->hashcode = vn_reference_compute_hash (vr); |
| 3505 | |
| 3506 | /* Try folding the new reference to a constant. */ |
| 3507 | tree val = fully_constant_vn_reference_p (vr); |
| 3508 | if (val) |
| 3509 | { |
| 3510 | if (data->partial_defs.is_empty ()) |
| 3511 | return data->finish (ao_ref_alias_set (&lhs_ref), |
| 3512 | ao_ref_base_alias_set (&lhs_ref), val); |
| 3513 | /* This is the only interesting case for partial-def handling |
| 3514 | coming from targets that like to gimplify init-ctors as |
| 3515 | aggregate copies from constant data like aarch64 for |
| 3516 | PR83518. */ |
| 3517 | if (maxsize.is_constant (&maxsizei) && known_eq (ref->size, maxsize)(!maybe_ne (ref->size, maxsize))) |
| 3518 | { |
| 3519 | pd_data pd; |
| 3520 | pd.rhs = val; |
| 3521 | pd.rhs_off = 0; |
| 3522 | pd.offset = 0; |
| 3523 | pd.size = maxsizei; |
| 3524 | return data->push_partial_def (pd, ao_ref_alias_set (&lhs_ref), |
| 3525 | ao_ref_base_alias_set (&lhs_ref), |
| 3526 | 0, maxsizei); |
| 3527 | } |
| 3528 | } |
| 3529 | |
| 3530 | /* Continuing with partial defs isn't easily possible here, we |
| 3531 | have to find a full def from further lookups from here. Probably |
| 3532 | not worth the special-casing everywhere. */ |
| 3533 | if (!data->partial_defs.is_empty ()) |
| 3534 | return (void *)-1; |
| 3535 | |
| 3536 | /* Adjust *ref from the new operands. */ |
| 3537 | ao_ref rhs1_ref; |
| 3538 | ao_ref_init (&rhs1_ref, rhs1); |
| 3539 | if (!ao_ref_init_from_vn_reference (&r, |
| 3540 | force_no_tbaa ? 0 |
| 3541 | : ao_ref_alias_set (&rhs1_ref), |
| 3542 | force_no_tbaa ? 0 |
| 3543 | : ao_ref_base_alias_set (&rhs1_ref), |
| 3544 | vr->type, vr->operands)) |
| 3545 | return (void *)-1; |
| 3546 | /* This can happen with bitfields. */ |
| 3547 | if (maybe_ne (ref->size, r.size)) |
| 3548 | { |
| 3549 | /* If the access lacks some subsetting simply apply that by |
| 3550 | shortening it. That in the end can only be successful |
| 3551 | if we can pun the lookup result which in turn requires |
| 3552 | exact offsets. */ |
| 3553 | if (known_eq (r.size, r.max_size)(!maybe_ne (r.size, r.max_size)) |
| 3554 | && known_lt (ref->size, r.size)(!maybe_le (r.size, ref->size))) |
| 3555 | r.size = r.max_size = ref->size; |
| 3556 | else |
| 3557 | return (void *)-1; |
| 3558 | } |
| 3559 | *ref = r; |
| 3560 | |
| 3561 | /* Do not update last seen VUSE after translating. */ |
| 3562 | data->last_vuse_ptr = NULLnullptr; |
| 3563 | /* Invalidate the original access path since it now contains |
| 3564 | the wrong base. */ |
| 3565 | data->orig_ref.ref = NULL_TREE(tree) nullptr; |
| 3566 | /* Use the alias-set of this LHS for recording an eventual result. */ |
| 3567 | if (data->first_set == -2) |
| 3568 | { |
| 3569 | data->first_set = ao_ref_alias_set (&lhs_ref); |
| 3570 | data->first_base_set = ao_ref_base_alias_set (&lhs_ref); |
| 3571 | } |
| 3572 | |
| 3573 | /* Keep looking for the adjusted *REF / VR pair. */ |
| 3574 | return NULLnullptr; |
| 3575 | } |
| 3576 | |
| 3577 | /* 6) For memcpy copies translate the reference through them if the copy |
| 3578 | kills ref. But we cannot (easily) do this translation if the memcpy is |
| 3579 | a storage order barrier, i.e. is equivalent to a VIEW_CONVERT_EXPR that |
| 3580 | can modify the storage order of objects (see storage_order_barrier_p). */ |
| 3581 | else if (data->vn_walk_kind == VN_WALKREWRITE |
| 3582 | && is_gimple_reg_type (vr->type) |
| 3583 | /* ??? Handle BCOPY as well. */ |
| 3584 | && (gimple_call_builtin_p (def_stmt, BUILT_IN_MEMCPY) |
| 3585 | || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMCPY_CHK) |
| 3586 | || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMPCPY) |
| 3587 | || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMPCPY_CHK) |
| 3588 | || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMMOVE) |
| 3589 | || gimple_call_builtin_p (def_stmt, BUILT_IN_MEMMOVE_CHK)) |
| 3590 | && (TREE_CODE (gimple_call_arg (def_stmt, 0))((enum tree_code) (gimple_call_arg (def_stmt, 0))->base.code ) == ADDR_EXPR |
| 3591 | || TREE_CODE (gimple_call_arg (def_stmt, 0))((enum tree_code) (gimple_call_arg (def_stmt, 0))->base.code ) == SSA_NAME) |
| 3592 | && (TREE_CODE (gimple_call_arg (def_stmt, 1))((enum tree_code) (gimple_call_arg (def_stmt, 1))->base.code ) == ADDR_EXPR |
| 3593 | || TREE_CODE (gimple_call_arg (def_stmt, 1))((enum tree_code) (gimple_call_arg (def_stmt, 1))->base.code ) == SSA_NAME) |
| 3594 | && (poly_int_tree_p (gimple_call_arg (def_stmt, 2), ©_size) |
| 3595 | || (TREE_CODE (gimple_call_arg (def_stmt, 2))((enum tree_code) (gimple_call_arg (def_stmt, 2))->base.code ) == SSA_NAME |
| 3596 | && poly_int_tree_p (SSA_VAL (gimple_call_arg (def_stmt, 2)), |
| 3597 | ©_size))) |
| 3598 | /* Handling this is more complicated, give up for now. */ |
| 3599 | && data->partial_defs.is_empty ()) |
| 3600 | { |
| 3601 | tree lhs, rhs; |
| 3602 | ao_ref r; |
| 3603 | poly_int64 rhs_offset, lhs_offset; |
| 3604 | vn_reference_op_s op; |
| 3605 | poly_uint64 mem_offset; |
| 3606 | poly_int64 at, byte_maxsize; |
| 3607 | |
| 3608 | /* Only handle non-variable, addressable refs. */ |
| 3609 | if (maybe_ne (ref->size, maxsize) |
| 3610 | || !multiple_p (offset, BITS_PER_UNIT(8), &at) |
| 3611 | || !multiple_p (maxsize, BITS_PER_UNIT(8), &byte_maxsize)) |
| 3612 | return (void *)-1; |
| 3613 | |
| 3614 | /* Extract a pointer base and an offset for the destination. */ |
| 3615 | lhs = gimple_call_arg (def_stmt, 0); |
| 3616 | lhs_offset = 0; |
| 3617 | if (TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) == SSA_NAME) |
| 3618 | { |
| 3619 | lhs = vn_valueize (lhs); |
| 3620 | if (TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) == SSA_NAME) |
| 3621 | { |
| 3622 | gimple *def_stmt = SSA_NAME_DEF_STMT (lhs)(tree_check ((lhs), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3622, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt; |
| 3623 | if (gimple_assign_single_p (def_stmt) |
| 3624 | && gimple_assign_rhs_code (def_stmt) == ADDR_EXPR) |
| 3625 | lhs = gimple_assign_rhs1 (def_stmt); |
| 3626 | } |
| 3627 | } |
| 3628 | if (TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) == ADDR_EXPR) |
| 3629 | { |
| 3630 | if (AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (lhs)))(((enum tree_code) (((contains_struct_check ((((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3630, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3630, __FUNCTION__))->typed.type))->base.code) == ARRAY_TYPE || (((enum tree_code) (((contains_struct_check ((((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3630, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3630, __FUNCTION__))->typed.type))->base.code) == RECORD_TYPE || ((enum tree_code) (((contains_struct_check ((((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3630, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3630, __FUNCTION__))->typed.type))->base.code) == UNION_TYPE || ((enum tree_code) (((contains_struct_check ((((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3630, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3630, __FUNCTION__))->typed.type))->base.code) == QUAL_UNION_TYPE )) |
| 3631 | && TYPE_REVERSE_STORAGE_ORDER (TREE_TYPE (TREE_TYPE (lhs)))((tree_check4 ((((contains_struct_check ((((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3631, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3631, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3631, __FUNCTION__, (RECORD_TYPE), (UNION_TYPE), (QUAL_UNION_TYPE ), (ARRAY_TYPE)))->base.u.bits.saturating_flag)) |
| 3632 | return (void *)-1; |
| 3633 | tree tem = get_addr_base_and_unit_offset (TREE_OPERAND (lhs, 0)(*((const_cast<tree*> (tree_operand_check ((lhs), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3633, __FUNCTION__))))), |
| 3634 | &lhs_offset); |
| 3635 | if (!tem) |
| 3636 | return (void *)-1; |
| 3637 | if (TREE_CODE (tem)((enum tree_code) (tem)->base.code) == MEM_REF |
| 3638 | && poly_int_tree_p (TREE_OPERAND (tem, 1)(*((const_cast<tree*> (tree_operand_check ((tem), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3638, __FUNCTION__))))), &mem_offset)) |
| 3639 | { |
| 3640 | lhs = TREE_OPERAND (tem, 0)(*((const_cast<tree*> (tree_operand_check ((tem), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3640, __FUNCTION__))))); |
| 3641 | if (TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) == SSA_NAME) |
| 3642 | lhs = vn_valueize (lhs); |
| 3643 | lhs_offset += mem_offset; |
| 3644 | } |
| 3645 | else if (DECL_P (tem)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (tem)->base.code))] == tcc_declaration)) |
| 3646 | lhs = build_fold_addr_expr (tem)build_fold_addr_expr_loc (((location_t) 0), (tem)); |
| 3647 | else |
| 3648 | return (void *)-1; |
| 3649 | } |
| 3650 | if (TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) != SSA_NAME |
| 3651 | && TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) != ADDR_EXPR) |
| 3652 | return (void *)-1; |
| 3653 | |
| 3654 | /* Extract a pointer base and an offset for the source. */ |
| 3655 | rhs = gimple_call_arg (def_stmt, 1); |
| 3656 | rhs_offset = 0; |
| 3657 | if (TREE_CODE (rhs)((enum tree_code) (rhs)->base.code) == SSA_NAME) |
| 3658 | rhs = vn_valueize (rhs); |
| 3659 | if (TREE_CODE (rhs)((enum tree_code) (rhs)->base.code) == ADDR_EXPR) |
| 3660 | { |
| 3661 | if (AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (rhs)))(((enum tree_code) (((contains_struct_check ((((contains_struct_check ((rhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3661, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3661, __FUNCTION__))->typed.type))->base.code) == ARRAY_TYPE || (((enum tree_code) (((contains_struct_check ((((contains_struct_check ((rhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3661, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3661, __FUNCTION__))->typed.type))->base.code) == RECORD_TYPE || ((enum tree_code) (((contains_struct_check ((((contains_struct_check ((rhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3661, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3661, __FUNCTION__))->typed.type))->base.code) == UNION_TYPE || ((enum tree_code) (((contains_struct_check ((((contains_struct_check ((rhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3661, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3661, __FUNCTION__))->typed.type))->base.code) == QUAL_UNION_TYPE )) |
| 3662 | && TYPE_REVERSE_STORAGE_ORDER (TREE_TYPE (TREE_TYPE (rhs)))((tree_check4 ((((contains_struct_check ((((contains_struct_check ((rhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3662, __FUNCTION__))->typed.type)), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3662, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3662, __FUNCTION__, (RECORD_TYPE), (UNION_TYPE), (QUAL_UNION_TYPE ), (ARRAY_TYPE)))->base.u.bits.saturating_flag)) |
| 3663 | return (void *)-1; |
| 3664 | tree tem = get_addr_base_and_unit_offset (TREE_OPERAND (rhs, 0)(*((const_cast<tree*> (tree_operand_check ((rhs), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3664, __FUNCTION__))))), |
| 3665 | &rhs_offset); |
| 3666 | if (!tem) |
| 3667 | return (void *)-1; |
| 3668 | if (TREE_CODE (tem)((enum tree_code) (tem)->base.code) == MEM_REF |
| 3669 | && poly_int_tree_p (TREE_OPERAND (tem, 1)(*((const_cast<tree*> (tree_operand_check ((tem), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3669, __FUNCTION__))))), &mem_offset)) |
| 3670 | { |
| 3671 | rhs = TREE_OPERAND (tem, 0)(*((const_cast<tree*> (tree_operand_check ((tem), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3671, __FUNCTION__))))); |
| 3672 | rhs_offset += mem_offset; |
| 3673 | } |
| 3674 | else if (DECL_P (tem)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (tem)->base.code))] == tcc_declaration) |
| 3675 | || TREE_CODE (tem)((enum tree_code) (tem)->base.code) == STRING_CST) |
| 3676 | rhs = build_fold_addr_expr (tem)build_fold_addr_expr_loc (((location_t) 0), (tem)); |
| 3677 | else |
| 3678 | return (void *)-1; |
| 3679 | } |
| 3680 | if (TREE_CODE (rhs)((enum tree_code) (rhs)->base.code) == SSA_NAME) |
| 3681 | rhs = SSA_VAL (rhs); |
| 3682 | else if (TREE_CODE (rhs)((enum tree_code) (rhs)->base.code) != ADDR_EXPR) |
| 3683 | return (void *)-1; |
| 3684 | |
| 3685 | /* The bases of the destination and the references have to agree. */ |
| 3686 | if (TREE_CODE (base)((enum tree_code) (base)->base.code) == MEM_REF) |
| 3687 | { |
| 3688 | if (TREE_OPERAND (base, 0)(*((const_cast<tree*> (tree_operand_check ((base), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3688, __FUNCTION__))))) != lhs |
| 3689 | || !poly_int_tree_p (TREE_OPERAND (base, 1)(*((const_cast<tree*> (tree_operand_check ((base), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3689, __FUNCTION__))))), &mem_offset)) |
| 3690 | return (void *) -1; |
| 3691 | at += mem_offset; |
| 3692 | } |
| 3693 | else if (!DECL_P (base)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (base)->base.code))] == tcc_declaration) |
| 3694 | || TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) != ADDR_EXPR |
| 3695 | || TREE_OPERAND (lhs, 0)(*((const_cast<tree*> (tree_operand_check ((lhs), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3695, __FUNCTION__))))) != base) |
| 3696 | return (void *)-1; |
| 3697 | |
| 3698 | /* If the access is completely outside of the memcpy destination |
| 3699 | area there is no aliasing. */ |
| 3700 | if (!ranges_maybe_overlap_p (lhs_offset, copy_size, at, byte_maxsize)) |
| 3701 | return NULLnullptr; |
| 3702 | /* And the access has to be contained within the memcpy destination. */ |
| 3703 | if (!known_subrange_p (at, byte_maxsize, lhs_offset, copy_size)) |
| 3704 | return (void *)-1; |
| 3705 | |
| 3706 | /* Save the operands since we need to use the original ones for |
| 3707 | the hash entry we use. */ |
| 3708 | if (!data->saved_operands.exists ()) |
| 3709 | data->saved_operands = vr->operands.copy (); |
| 3710 | |
| 3711 | /* Make room for 2 operands in the new reference. */ |
| 3712 | if (vr->operands.length () < 2) |
| 3713 | { |
| 3714 | vec<vn_reference_op_s> old = vr->operands; |
| 3715 | vr->operands.safe_grow_cleared (2, true); |
| 3716 | if (old == shared_lookup_references) |
| 3717 | shared_lookup_references = vr->operands; |
| 3718 | } |
| 3719 | else |
| 3720 | vr->operands.truncate (2); |
| 3721 | |
| 3722 | /* The looked-through reference is a simple MEM_REF. */ |
| 3723 | memset (&op, 0, sizeof (op)); |
| 3724 | op.type = vr->type; |
| 3725 | op.opcode = MEM_REF; |
| 3726 | op.op0 = build_int_cst (ptr_type_nodeglobal_trees[TI_PTR_TYPE], at - lhs_offset + rhs_offset); |
| 3727 | op.off = at - lhs_offset + rhs_offset; |
| 3728 | vr->operands[0] = op; |
| 3729 | op.type = TREE_TYPE (rhs)((contains_struct_check ((rhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3729, __FUNCTION__))->typed.type); |
| 3730 | op.opcode = TREE_CODE (rhs)((enum tree_code) (rhs)->base.code); |
| 3731 | op.op0 = rhs; |
| 3732 | op.off = -1; |
| 3733 | vr->operands[1] = op; |
| 3734 | vr->hashcode = vn_reference_compute_hash (vr); |
| 3735 | |
| 3736 | /* Try folding the new reference to a constant. */ |
| 3737 | tree val = fully_constant_vn_reference_p (vr); |
| 3738 | if (val) |
| 3739 | return data->finish (0, 0, val); |
| 3740 | |
| 3741 | /* Adjust *ref from the new operands. */ |
| 3742 | if (!ao_ref_init_from_vn_reference (&r, 0, 0, vr->type, vr->operands)) |
| 3743 | return (void *)-1; |
| 3744 | /* This can happen with bitfields. */ |
| 3745 | if (maybe_ne (ref->size, r.size)) |
| 3746 | return (void *)-1; |
| 3747 | *ref = r; |
| 3748 | |
| 3749 | /* Do not update last seen VUSE after translating. */ |
| 3750 | data->last_vuse_ptr = NULLnullptr; |
| 3751 | /* Invalidate the original access path since it now contains |
| 3752 | the wrong base. */ |
| 3753 | data->orig_ref.ref = NULL_TREE(tree) nullptr; |
| 3754 | /* Use the alias-set of this stmt for recording an eventual result. */ |
| 3755 | if (data->first_set == -2) |
| 3756 | { |
| 3757 | data->first_set = 0; |
| 3758 | data->first_base_set = 0; |
| 3759 | } |
| 3760 | |
| 3761 | /* Keep looking for the adjusted *REF / VR pair. */ |
| 3762 | return NULLnullptr; |
| 3763 | } |
| 3764 | |
| 3765 | /* Bail out and stop walking. */ |
| 3766 | return (void *)-1; |
| 3767 | } |
| 3768 | |
| 3769 | /* Return a reference op vector from OP that can be used for |
| 3770 | vn_reference_lookup_pieces. The caller is responsible for releasing |
| 3771 | the vector. */ |
| 3772 | |
| 3773 | vec<vn_reference_op_s> |
| 3774 | vn_reference_operands_for_lookup (tree op) |
| 3775 | { |
| 3776 | bool valueized; |
| 3777 | return valueize_shared_reference_ops_from_ref (op, &valueized).copy (); |
| 3778 | } |
| 3779 | |
| 3780 | /* Lookup a reference operation by it's parts, in the current hash table. |
| 3781 | Returns the resulting value number if it exists in the hash table, |
| 3782 | NULL_TREE otherwise. VNRESULT will be filled in with the actual |
| 3783 | vn_reference_t stored in the hashtable if something is found. */ |
| 3784 | |
| 3785 | tree |
| 3786 | vn_reference_lookup_pieces (tree vuse, alias_set_type set, |
| 3787 | alias_set_type base_set, tree type, |
| 3788 | vec<vn_reference_op_s> operands, |
| 3789 | vn_reference_t *vnresult, vn_lookup_kind kind) |
| 3790 | { |
| 3791 | struct vn_reference_s vr1; |
| 3792 | vn_reference_t tmp; |
| 3793 | tree cst; |
| 3794 | |
| 3795 | if (!vnresult) |
| 3796 | vnresult = &tmp; |
| 3797 | *vnresult = NULLnullptr; |
| 3798 | |
| 3799 | vr1.vuse = vuse_ssa_val (vuse); |
| 3800 | shared_lookup_references.truncate (0); |
| 3801 | shared_lookup_references.safe_grow (operands.length (), true); |
| 3802 | memcpy (shared_lookup_references.address (), |
| 3803 | operands.address (), |
| 3804 | sizeof (vn_reference_op_s) |
| 3805 | * operands.length ()); |
| 3806 | bool valueized_p; |
| 3807 | valueize_refs_1 (&shared_lookup_references, &valueized_p); |
| 3808 | vr1.operands = shared_lookup_references; |
| 3809 | vr1.type = type; |
| 3810 | vr1.set = set; |
| 3811 | vr1.base_set = base_set; |
| 3812 | vr1.hashcode = vn_reference_compute_hash (&vr1); |
| 3813 | if ((cst = fully_constant_vn_reference_p (&vr1))) |
| 3814 | return cst; |
| 3815 | |
| 3816 | vn_reference_lookup_1 (&vr1, vnresult); |
| 3817 | if (!*vnresult |
| 3818 | && kind != VN_NOWALK |
| 3819 | && vr1.vuse) |
| 3820 | { |
| 3821 | ao_ref r; |
| 3822 | unsigned limit = param_sccvn_max_alias_queries_per_accessglobal_options.x_param_sccvn_max_alias_queries_per_access; |
| 3823 | vn_walk_cb_data data (&vr1, NULL_TREE(tree) nullptr, NULLnullptr, kind, true, NULL_TREE(tree) nullptr, |
| 3824 | false); |
| 3825 | vec<vn_reference_op_s> ops_for_ref; |
| 3826 | if (!valueized_p) |
| 3827 | ops_for_ref = vr1.operands; |
| 3828 | else |
| 3829 | { |
| 3830 | /* For ao_ref_from_mem we have to ensure only available SSA names |
| 3831 | end up in base and the only convenient way to make this work |
| 3832 | for PRE is to re-valueize with that in mind. */ |
| 3833 | ops_for_ref.create (operands.length ()); |
| 3834 | ops_for_ref.quick_grow (operands.length ()); |
| 3835 | memcpy (ops_for_ref.address (), |
| 3836 | operands.address (), |
| 3837 | sizeof (vn_reference_op_s) |
| 3838 | * operands.length ()); |
| 3839 | valueize_refs_1 (&ops_for_ref, &valueized_p, true); |
| 3840 | } |
| 3841 | if (ao_ref_init_from_vn_reference (&r, set, base_set, type, |
| 3842 | ops_for_ref)) |
| 3843 | *vnresult |
| 3844 | = ((vn_reference_t) |
| 3845 | walk_non_aliased_vuses (&r, vr1.vuse, true, vn_reference_lookup_2, |
| 3846 | vn_reference_lookup_3, vuse_valueize, |
| 3847 | limit, &data)); |
| 3848 | if (ops_for_ref != shared_lookup_references) |
| 3849 | ops_for_ref.release (); |
| 3850 | gcc_checking_assert (vr1.operands == shared_lookup_references)((void)(!(vr1.operands == shared_lookup_references) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3850, __FUNCTION__), 0 : 0)); |
| 3851 | if (*vnresult |
| 3852 | && data.same_val |
| 3853 | && (!(*vnresult)->result |
| 3854 | || !operand_equal_p ((*vnresult)->result, data.same_val))) |
| 3855 | { |
| 3856 | *vnresult = NULLnullptr; |
| 3857 | return NULL_TREE(tree) nullptr; |
| 3858 | } |
| 3859 | } |
| 3860 | |
| 3861 | if (*vnresult) |
| 3862 | return (*vnresult)->result; |
| 3863 | |
| 3864 | return NULL_TREE(tree) nullptr; |
| 3865 | } |
| 3866 | |
| 3867 | /* Lookup OP in the current hash table, and return the resulting value |
| 3868 | number if it exists in the hash table. Return NULL_TREE if it does |
| 3869 | not exist in the hash table or if the result field of the structure |
| 3870 | was NULL.. VNRESULT will be filled in with the vn_reference_t |
| 3871 | stored in the hashtable if one exists. When TBAA_P is false assume |
| 3872 | we are looking up a store and treat it as having alias-set zero. |
| 3873 | *LAST_VUSE_PTR will be updated with the VUSE the value lookup succeeded. |
| 3874 | MASK is either NULL_TREE, or can be an INTEGER_CST if the result of the |
| 3875 | load is bitwise anded with MASK and so we are only interested in a subset |
| 3876 | of the bits and can ignore if the other bits are uninitialized or |
| 3877 | not initialized with constants. When doing redundant store removal |
| 3878 | the caller has to set REDUNDANT_STORE_REMOVAL_P. */ |
| 3879 | |
| 3880 | tree |
| 3881 | vn_reference_lookup (tree op, tree vuse, vn_lookup_kind kind, |
| 3882 | vn_reference_t *vnresult, bool tbaa_p, |
| 3883 | tree *last_vuse_ptr, tree mask, |
| 3884 | bool redundant_store_removal_p) |
| 3885 | { |
| 3886 | vec<vn_reference_op_s> operands; |
| 3887 | struct vn_reference_s vr1; |
| 3888 | bool valueized_anything; |
| 3889 | |
| 3890 | if (vnresult) |
| 3891 | *vnresult = NULLnullptr; |
| 3892 | |
| 3893 | vr1.vuse = vuse_ssa_val (vuse); |
| 3894 | vr1.operands = operands |
| 3895 | = valueize_shared_reference_ops_from_ref (op, &valueized_anything); |
| 3896 | |
| 3897 | /* Handle &MEM[ptr + 5].b[1].c as POINTER_PLUS_EXPR. Avoid doing |
| 3898 | this before the pass folding __builtin_object_size had a chance to run. */ |
| 3899 | if ((cfun(cfun + 0)->curr_properties & PROP_objsz(1 << 4)) |
| 3900 | && operands[0].opcode == ADDR_EXPR |
| 3901 | && operands.last ().opcode == SSA_NAME) |
| 3902 | { |
| 3903 | poly_int64 off = 0; |
| 3904 | vn_reference_op_t vro; |
| 3905 | unsigned i; |
| 3906 | for (i = 1; operands.iterate (i, &vro); ++i) |
| 3907 | { |
| 3908 | if (vro->opcode == SSA_NAME) |
| 3909 | break; |
| 3910 | else if (known_eq (vro->off, -1)(!maybe_ne (vro->off, -1))) |
| 3911 | break; |
| 3912 | off += vro->off; |
| 3913 | } |
| 3914 | if (i == operands.length () - 1 |
| 3915 | /* Make sure we the offset we accumulated in a 64bit int |
| 3916 | fits the address computation carried out in target |
| 3917 | offset precision. */ |
| 3918 | && (off.coeffs[0] |
| 3919 | == sext_hwi (off.coeffs[0], TYPE_PRECISION (sizetype)((tree_class_check ((sizetype_tab[(int) stk_sizetype]), (tcc_type ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3919, __FUNCTION__))->type_common.precision)))) |
| 3920 | { |
| 3921 | gcc_assert (operands[i-1].opcode == MEM_REF)((void)(!(operands[i-1].opcode == MEM_REF) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3921, __FUNCTION__), 0 : 0)); |
| 3922 | tree ops[2]; |
| 3923 | ops[0] = operands[i].op0; |
| 3924 | ops[1] = wide_int_to_tree (sizetypesizetype_tab[(int) stk_sizetype], off); |
| 3925 | tree res = vn_nary_op_lookup_pieces (2, POINTER_PLUS_EXPR, |
| 3926 | TREE_TYPE (op)((contains_struct_check ((op), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3926, __FUNCTION__))->typed.type), ops, NULLnullptr); |
| 3927 | if (res) |
| 3928 | return res; |
| 3929 | return NULL_TREE(tree) nullptr; |
| 3930 | } |
| 3931 | } |
| 3932 | |
| 3933 | vr1.type = TREE_TYPE (op)((contains_struct_check ((op), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3933, __FUNCTION__))->typed.type); |
| 3934 | ao_ref op_ref; |
| 3935 | ao_ref_init (&op_ref, op); |
| 3936 | vr1.set = ao_ref_alias_set (&op_ref); |
| 3937 | vr1.base_set = ao_ref_base_alias_set (&op_ref); |
| 3938 | vr1.hashcode = vn_reference_compute_hash (&vr1); |
| 3939 | if (mask == NULL_TREE(tree) nullptr) |
| 3940 | if (tree cst = fully_constant_vn_reference_p (&vr1)) |
| 3941 | return cst; |
| 3942 | |
| 3943 | if (kind != VN_NOWALK && vr1.vuse) |
| 3944 | { |
| 3945 | vn_reference_t wvnresult; |
| 3946 | ao_ref r; |
| 3947 | unsigned limit = param_sccvn_max_alias_queries_per_accessglobal_options.x_param_sccvn_max_alias_queries_per_access; |
| 3948 | auto_vec<vn_reference_op_s> ops_for_ref; |
| 3949 | if (valueized_anything) |
| 3950 | { |
| 3951 | copy_reference_ops_from_ref (op, &ops_for_ref); |
| 3952 | bool tem; |
| 3953 | valueize_refs_1 (&ops_for_ref, &tem, true); |
| 3954 | } |
| 3955 | /* Make sure to use a valueized reference if we valueized anything. |
| 3956 | Otherwise preserve the full reference for advanced TBAA. */ |
| 3957 | if (!valueized_anything |
| 3958 | || !ao_ref_init_from_vn_reference (&r, vr1.set, vr1.base_set, |
| 3959 | vr1.type, ops_for_ref)) |
| 3960 | ao_ref_init (&r, op); |
| 3961 | vn_walk_cb_data data (&vr1, r.ref ? NULL_TREE(tree) nullptr : op, |
| 3962 | last_vuse_ptr, kind, tbaa_p, mask, |
| 3963 | redundant_store_removal_p); |
| 3964 | |
| 3965 | wvnresult |
| 3966 | = ((vn_reference_t) |
| 3967 | walk_non_aliased_vuses (&r, vr1.vuse, tbaa_p, vn_reference_lookup_2, |
| 3968 | vn_reference_lookup_3, vuse_valueize, limit, |
| 3969 | &data)); |
| 3970 | gcc_checking_assert (vr1.operands == shared_lookup_references)((void)(!(vr1.operands == shared_lookup_references) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3970, __FUNCTION__), 0 : 0)); |
| 3971 | if (wvnresult) |
| 3972 | { |
| 3973 | gcc_assert (mask == NULL_TREE)((void)(!(mask == (tree) nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 3973, __FUNCTION__), 0 : 0)); |
| 3974 | if (data.same_val |
| 3975 | && (!wvnresult->result |
| 3976 | || !operand_equal_p (wvnresult->result, data.same_val))) |
| 3977 | return NULL_TREE(tree) nullptr; |
| 3978 | if (vnresult) |
| 3979 | *vnresult = wvnresult; |
| 3980 | return wvnresult->result; |
| 3981 | } |
| 3982 | else if (mask) |
| 3983 | return data.masked_result; |
| 3984 | |
| 3985 | return NULL_TREE(tree) nullptr; |
| 3986 | } |
| 3987 | |
| 3988 | if (last_vuse_ptr) |
| 3989 | *last_vuse_ptr = vr1.vuse; |
| 3990 | if (mask) |
| 3991 | return NULL_TREE(tree) nullptr; |
| 3992 | return vn_reference_lookup_1 (&vr1, vnresult); |
| 3993 | } |
| 3994 | |
| 3995 | /* Lookup CALL in the current hash table and return the entry in |
| 3996 | *VNRESULT if found. Populates *VR for the hashtable lookup. */ |
| 3997 | |
| 3998 | void |
| 3999 | vn_reference_lookup_call (gcall *call, vn_reference_t *vnresult, |
| 4000 | vn_reference_t vr) |
| 4001 | { |
| 4002 | if (vnresult) |
| 4003 | *vnresult = NULLnullptr; |
| 4004 | |
| 4005 | tree vuse = gimple_vuse (call); |
| 4006 | |
| 4007 | vr->vuse = vuse ? SSA_VAL (vuse) : NULL_TREE(tree) nullptr; |
| 4008 | vr->operands = valueize_shared_reference_ops_from_call (call); |
| 4009 | tree lhs = gimple_call_lhs (call); |
| 4010 | /* For non-SSA return values the referece ops contain the LHS. */ |
| 4011 | vr->type = ((lhs && TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) == SSA_NAME) |
| 4012 | ? TREE_TYPE (lhs)((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4012, __FUNCTION__))->typed.type) : NULL_TREE(tree) nullptr); |
| 4013 | vr->punned = false; |
| 4014 | vr->set = 0; |
| 4015 | vr->base_set = 0; |
| 4016 | vr->hashcode = vn_reference_compute_hash (vr); |
| 4017 | vn_reference_lookup_1 (vr, vnresult); |
| 4018 | } |
| 4019 | |
| 4020 | /* Insert OP into the current hash table with a value number of RESULT. */ |
| 4021 | |
| 4022 | static void |
| 4023 | vn_reference_insert (tree op, tree result, tree vuse, tree vdef) |
| 4024 | { |
| 4025 | vn_reference_s **slot; |
| 4026 | vn_reference_t vr1; |
| 4027 | bool tem; |
| 4028 | |
| 4029 | vec<vn_reference_op_s> operands |
| 4030 | = valueize_shared_reference_ops_from_ref (op, &tem); |
| 4031 | /* Handle &MEM[ptr + 5].b[1].c as POINTER_PLUS_EXPR. Avoid doing this |
| 4032 | before the pass folding __builtin_object_size had a chance to run. */ |
| 4033 | if ((cfun(cfun + 0)->curr_properties & PROP_objsz(1 << 4)) |
| 4034 | && operands[0].opcode == ADDR_EXPR |
| 4035 | && operands.last ().opcode == SSA_NAME) |
| 4036 | { |
| 4037 | poly_int64 off = 0; |
| 4038 | vn_reference_op_t vro; |
| 4039 | unsigned i; |
| 4040 | for (i = 1; operands.iterate (i, &vro); ++i) |
| 4041 | { |
| 4042 | if (vro->opcode == SSA_NAME) |
| 4043 | break; |
| 4044 | else if (known_eq (vro->off, -1)(!maybe_ne (vro->off, -1))) |
| 4045 | break; |
| 4046 | off += vro->off; |
| 4047 | } |
| 4048 | if (i == operands.length () - 1 |
| 4049 | /* Make sure we the offset we accumulated in a 64bit int |
| 4050 | fits the address computation carried out in target |
| 4051 | offset precision. */ |
| 4052 | && (off.coeffs[0] |
| 4053 | == sext_hwi (off.coeffs[0], TYPE_PRECISION (sizetype)((tree_class_check ((sizetype_tab[(int) stk_sizetype]), (tcc_type ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4053, __FUNCTION__))->type_common.precision)))) |
| 4054 | { |
| 4055 | gcc_assert (operands[i-1].opcode == MEM_REF)((void)(!(operands[i-1].opcode == MEM_REF) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4055, __FUNCTION__), 0 : 0)); |
| 4056 | tree ops[2]; |
| 4057 | ops[0] = operands[i].op0; |
| 4058 | ops[1] = wide_int_to_tree (sizetypesizetype_tab[(int) stk_sizetype], off); |
| 4059 | vn_nary_op_insert_pieces (2, POINTER_PLUS_EXPR, |
| 4060 | TREE_TYPE (op)((contains_struct_check ((op), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4060, __FUNCTION__))->typed.type), ops, result, |
| 4061 | VN_INFO (result)->value_id); |
| 4062 | return; |
| 4063 | } |
| 4064 | } |
| 4065 | |
| 4066 | vr1 = XOBNEW (&vn_tables_obstack, vn_reference_s)((vn_reference_s *) __extension__ ({ struct obstack *__h = (( &vn_tables_obstack)); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_reference_s))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o , __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1 ->object_base; if (__o1->next_free == __value) __o1-> maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t ) < sizeof (void *) ? ((__o1->object_base) + (((__o1-> next_free) - (__o1->object_base) + (__o1->alignment_mask )) & ~(__o1->alignment_mask))) : (char *) (((ptrdiff_t ) (__o1->next_free) + (__o1->alignment_mask)) & ~(__o1 ->alignment_mask))); if ((size_t) (__o1->next_free - (char *) __o1->chunk) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk)) __o1->next_free = __o1->chunk_limit ; __o1->object_base = __o1->next_free; __value; }); })); |
| 4067 | if (TREE_CODE (result)((enum tree_code) (result)->base.code) == SSA_NAME) |
| 4068 | vr1->value_id = VN_INFO (result)->value_id; |
| 4069 | else |
| 4070 | vr1->value_id = get_or_alloc_constant_value_id (result); |
| 4071 | vr1->vuse = vuse_ssa_val (vuse); |
| 4072 | vr1->operands = operands.copy (); |
| 4073 | vr1->type = TREE_TYPE (op)((contains_struct_check ((op), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4073, __FUNCTION__))->typed.type); |
| 4074 | vr1->punned = false; |
| 4075 | ao_ref op_ref; |
| 4076 | ao_ref_init (&op_ref, op); |
| 4077 | vr1->set = ao_ref_alias_set (&op_ref); |
| 4078 | vr1->base_set = ao_ref_base_alias_set (&op_ref); |
| 4079 | vr1->hashcode = vn_reference_compute_hash (vr1); |
| 4080 | vr1->result = TREE_CODE (result)((enum tree_code) (result)->base.code) == SSA_NAME ? SSA_VAL (result) : result; |
| 4081 | vr1->result_vdef = vdef; |
| 4082 | |
| 4083 | slot = valid_info->references->find_slot_with_hash (vr1, vr1->hashcode, |
| 4084 | INSERT); |
| 4085 | |
| 4086 | /* Because IL walking on reference lookup can end up visiting |
| 4087 | a def that is only to be visited later in iteration order |
| 4088 | when we are about to make an irreducible region reducible |
| 4089 | the def can be effectively processed and its ref being inserted |
| 4090 | by vn_reference_lookup_3 already. So we cannot assert (!*slot) |
| 4091 | but save a lookup if we deal with already inserted refs here. */ |
| 4092 | if (*slot) |
| 4093 | { |
| 4094 | /* We cannot assert that we have the same value either because |
| 4095 | when disentangling an irreducible region we may end up visiting |
| 4096 | a use before the corresponding def. That's a missed optimization |
| 4097 | only though. See gcc.dg/tree-ssa/pr87126.c for example. */ |
| 4098 | if (dump_file && (dump_flags & TDF_DETAILS) |
| 4099 | && !operand_equal_p ((*slot)->result, vr1->result, 0)) |
| 4100 | { |
| 4101 | fprintf (dump_file, "Keeping old value "); |
| 4102 | print_generic_expr (dump_file, (*slot)->result); |
| 4103 | fprintf (dump_file, " because of collision\n"); |
| 4104 | } |
| 4105 | free_reference (vr1); |
| 4106 | obstack_free (&vn_tables_obstack, vr1)__extension__ ({ struct obstack *__o = (&vn_tables_obstack ); void *__obj = (void *) (vr1); if (__obj > (void *) __o-> chunk && __obj < (void *) __o->chunk_limit) __o ->next_free = __o->object_base = (char *) __obj; else _obstack_free (__o, __obj); }); |
| 4107 | return; |
| 4108 | } |
| 4109 | |
| 4110 | *slot = vr1; |
| 4111 | vr1->next = last_inserted_ref; |
| 4112 | last_inserted_ref = vr1; |
| 4113 | } |
| 4114 | |
| 4115 | /* Insert a reference by it's pieces into the current hash table with |
| 4116 | a value number of RESULT. Return the resulting reference |
| 4117 | structure we created. */ |
| 4118 | |
| 4119 | vn_reference_t |
| 4120 | vn_reference_insert_pieces (tree vuse, alias_set_type set, |
| 4121 | alias_set_type base_set, tree type, |
| 4122 | vec<vn_reference_op_s> operands, |
| 4123 | tree result, unsigned int value_id) |
| 4124 | |
| 4125 | { |
| 4126 | vn_reference_s **slot; |
| 4127 | vn_reference_t vr1; |
| 4128 | |
| 4129 | vr1 = XOBNEW (&vn_tables_obstack, vn_reference_s)((vn_reference_s *) __extension__ ({ struct obstack *__h = (( &vn_tables_obstack)); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_reference_s))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o , __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1 ->object_base; if (__o1->next_free == __value) __o1-> maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t ) < sizeof (void *) ? ((__o1->object_base) + (((__o1-> next_free) - (__o1->object_base) + (__o1->alignment_mask )) & ~(__o1->alignment_mask))) : (char *) (((ptrdiff_t ) (__o1->next_free) + (__o1->alignment_mask)) & ~(__o1 ->alignment_mask))); if ((size_t) (__o1->next_free - (char *) __o1->chunk) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk)) __o1->next_free = __o1->chunk_limit ; __o1->object_base = __o1->next_free; __value; }); })); |
| 4130 | vr1->value_id = value_id; |
| 4131 | vr1->vuse = vuse_ssa_val (vuse); |
| 4132 | vr1->operands = operands; |
| 4133 | valueize_refs (&vr1->operands); |
| 4134 | vr1->type = type; |
| 4135 | vr1->punned = false; |
| 4136 | vr1->set = set; |
| 4137 | vr1->base_set = base_set; |
| 4138 | vr1->hashcode = vn_reference_compute_hash (vr1); |
| 4139 | if (result && TREE_CODE (result)((enum tree_code) (result)->base.code) == SSA_NAME) |
| 4140 | result = SSA_VAL (result); |
| 4141 | vr1->result = result; |
| 4142 | vr1->result_vdef = NULL_TREE(tree) nullptr; |
| 4143 | |
| 4144 | slot = valid_info->references->find_slot_with_hash (vr1, vr1->hashcode, |
| 4145 | INSERT); |
| 4146 | |
| 4147 | /* At this point we should have all the things inserted that we have |
| 4148 | seen before, and we should never try inserting something that |
| 4149 | already exists. */ |
| 4150 | gcc_assert (!*slot)((void)(!(!*slot) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4150, __FUNCTION__), 0 : 0)); |
| 4151 | |
| 4152 | *slot = vr1; |
| 4153 | vr1->next = last_inserted_ref; |
| 4154 | last_inserted_ref = vr1; |
| 4155 | return vr1; |
| 4156 | } |
| 4157 | |
| 4158 | /* Compute and return the hash value for nary operation VBO1. */ |
| 4159 | |
| 4160 | hashval_t |
| 4161 | vn_nary_op_compute_hash (const vn_nary_op_t vno1) |
| 4162 | { |
| 4163 | inchash::hash hstate; |
| 4164 | unsigned i; |
| 4165 | |
| 4166 | if (((vno1->length == 2 |
| 4167 | && commutative_tree_code (vno1->opcode)) |
| 4168 | || (vno1->length == 3 |
| 4169 | && commutative_ternary_tree_code (vno1->opcode))) |
| 4170 | && tree_swap_operands_p (vno1->op[0], vno1->op[1])) |
| 4171 | std::swap (vno1->op[0], vno1->op[1]); |
| 4172 | else if (TREE_CODE_CLASS (vno1->opcode)tree_code_type_tmpl <0>::tree_code_type[(int) (vno1-> opcode)] == tcc_comparison |
| 4173 | && tree_swap_operands_p (vno1->op[0], vno1->op[1])) |
| 4174 | { |
| 4175 | std::swap (vno1->op[0], vno1->op[1]); |
| 4176 | vno1->opcode = swap_tree_comparison (vno1->opcode); |
| 4177 | } |
| 4178 | |
| 4179 | hstate.add_int (vno1->opcode); |
| 4180 | for (i = 0; i < vno1->length; ++i) |
| 4181 | inchash::add_expr (vno1->op[i], hstate); |
| 4182 | |
| 4183 | return hstate.end (); |
| 4184 | } |
| 4185 | |
| 4186 | /* Compare nary operations VNO1 and VNO2 and return true if they are |
| 4187 | equivalent. */ |
| 4188 | |
| 4189 | bool |
| 4190 | vn_nary_op_eq (const_vn_nary_op_t const vno1, const_vn_nary_op_t const vno2) |
| 4191 | { |
| 4192 | unsigned i; |
| 4193 | |
| 4194 | if (vno1->hashcode != vno2->hashcode) |
| 4195 | return false; |
| 4196 | |
| 4197 | if (vno1->length != vno2->length) |
| 4198 | return false; |
| 4199 | |
| 4200 | if (vno1->opcode != vno2->opcode |
| 4201 | || !types_compatible_p (vno1->type, vno2->type)) |
| 4202 | return false; |
| 4203 | |
| 4204 | for (i = 0; i < vno1->length; ++i) |
| 4205 | if (!expressions_equal_p (vno1->op[i], vno2->op[i])) |
| 4206 | return false; |
| 4207 | |
| 4208 | /* BIT_INSERT_EXPR has an implict operand as the type precision |
| 4209 | of op1. Need to check to make sure they are the same. */ |
| 4210 | if (vno1->opcode == BIT_INSERT_EXPR |
| 4211 | && TREE_CODE (vno1->op[1])((enum tree_code) (vno1->op[1])->base.code) == INTEGER_CST |
| 4212 | && TYPE_PRECISION (TREE_TYPE (vno1->op[1]))((tree_class_check ((((contains_struct_check ((vno1->op[1] ), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4212, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4212, __FUNCTION__))->type_common.precision) |
| 4213 | != TYPE_PRECISION (TREE_TYPE (vno2->op[1]))((tree_class_check ((((contains_struct_check ((vno2->op[1] ), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4213, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4213, __FUNCTION__))->type_common.precision)) |
| 4214 | return false; |
| 4215 | |
| 4216 | return true; |
| 4217 | } |
| 4218 | |
| 4219 | /* Initialize VNO from the pieces provided. */ |
| 4220 | |
| 4221 | static void |
| 4222 | init_vn_nary_op_from_pieces (vn_nary_op_t vno, unsigned int length, |
| 4223 | enum tree_code code, tree type, tree *ops) |
| 4224 | { |
| 4225 | vno->opcode = code; |
| 4226 | vno->length = length; |
| 4227 | vno->type = type; |
| 4228 | memcpy (&vno->op[0], ops, sizeof (tree) * length); |
| 4229 | } |
| 4230 | |
| 4231 | /* Return the number of operands for a vn_nary ops structure from STMT. */ |
| 4232 | |
| 4233 | unsigned int |
| 4234 | vn_nary_length_from_stmt (gimple *stmt) |
| 4235 | { |
| 4236 | switch (gimple_assign_rhs_code (stmt)) |
| 4237 | { |
| 4238 | case REALPART_EXPR: |
| 4239 | case IMAGPART_EXPR: |
| 4240 | case VIEW_CONVERT_EXPR: |
| 4241 | return 1; |
| 4242 | |
| 4243 | case BIT_FIELD_REF: |
| 4244 | return 3; |
| 4245 | |
| 4246 | case CONSTRUCTOR: |
| 4247 | return CONSTRUCTOR_NELTS (gimple_assign_rhs1 (stmt))(vec_safe_length (((tree_check ((gimple_assign_rhs1 (stmt)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4247, __FUNCTION__, (CONSTRUCTOR)))->constructor.elts))); |
| 4248 | |
| 4249 | default: |
| 4250 | return gimple_num_ops (stmt) - 1; |
| 4251 | } |
| 4252 | } |
| 4253 | |
| 4254 | /* Initialize VNO from STMT. */ |
| 4255 | |
| 4256 | void |
| 4257 | init_vn_nary_op_from_stmt (vn_nary_op_t vno, gassign *stmt) |
| 4258 | { |
| 4259 | unsigned i; |
| 4260 | |
| 4261 | vno->opcode = gimple_assign_rhs_code (stmt); |
| 4262 | vno->type = TREE_TYPE (gimple_assign_lhs (stmt))((contains_struct_check ((gimple_assign_lhs (stmt)), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4262, __FUNCTION__))->typed.type); |
| 4263 | switch (vno->opcode) |
| 4264 | { |
| 4265 | case REALPART_EXPR: |
| 4266 | case IMAGPART_EXPR: |
| 4267 | case VIEW_CONVERT_EXPR: |
| 4268 | vno->length = 1; |
| 4269 | vno->op[0] = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0)(*((const_cast<tree*> (tree_operand_check ((gimple_assign_rhs1 (stmt)), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4269, __FUNCTION__))))); |
| 4270 | break; |
| 4271 | |
| 4272 | case BIT_FIELD_REF: |
| 4273 | vno->length = 3; |
| 4274 | vno->op[0] = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0)(*((const_cast<tree*> (tree_operand_check ((gimple_assign_rhs1 (stmt)), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4274, __FUNCTION__))))); |
| 4275 | vno->op[1] = TREE_OPERAND (gimple_assign_rhs1 (stmt), 1)(*((const_cast<tree*> (tree_operand_check ((gimple_assign_rhs1 (stmt)), (1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4275, __FUNCTION__))))); |
| 4276 | vno->op[2] = TREE_OPERAND (gimple_assign_rhs1 (stmt), 2)(*((const_cast<tree*> (tree_operand_check ((gimple_assign_rhs1 (stmt)), (2), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4276, __FUNCTION__))))); |
| 4277 | break; |
| 4278 | |
| 4279 | case CONSTRUCTOR: |
| 4280 | vno->length = CONSTRUCTOR_NELTS (gimple_assign_rhs1 (stmt))(vec_safe_length (((tree_check ((gimple_assign_rhs1 (stmt)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4280, __FUNCTION__, (CONSTRUCTOR)))->constructor.elts))); |
| 4281 | for (i = 0; i < vno->length; ++i) |
| 4282 | vno->op[i] = CONSTRUCTOR_ELT (gimple_assign_rhs1 (stmt), i)(&(*((tree_check ((gimple_assign_rhs1 (stmt)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4282, __FUNCTION__, (CONSTRUCTOR)))->constructor.elts))[ i])->value; |
| 4283 | break; |
| 4284 | |
| 4285 | default: |
| 4286 | gcc_checking_assert (!gimple_assign_single_p (stmt))((void)(!(!gimple_assign_single_p (stmt)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4286, __FUNCTION__), 0 : 0)); |
| 4287 | vno->length = gimple_num_ops (stmt) - 1; |
| 4288 | for (i = 0; i < vno->length; ++i) |
| 4289 | vno->op[i] = gimple_op (stmt, i + 1); |
| 4290 | } |
| 4291 | } |
| 4292 | |
| 4293 | /* Compute the hashcode for VNO and look for it in the hash table; |
| 4294 | return the resulting value number if it exists in the hash table. |
| 4295 | Return NULL_TREE if it does not exist in the hash table or if the |
| 4296 | result field of the operation is NULL. VNRESULT will contain the |
| 4297 | vn_nary_op_t from the hashtable if it exists. */ |
| 4298 | |
| 4299 | static tree |
| 4300 | vn_nary_op_lookup_1 (vn_nary_op_t vno, vn_nary_op_t *vnresult) |
| 4301 | { |
| 4302 | vn_nary_op_s **slot; |
| 4303 | |
| 4304 | if (vnresult) |
| 4305 | *vnresult = NULLnullptr; |
| 4306 | |
| 4307 | for (unsigned i = 0; i < vno->length; ++i) |
| 4308 | if (TREE_CODE (vno->op[i])((enum tree_code) (vno->op[i])->base.code) == SSA_NAME) |
| 4309 | vno->op[i] = SSA_VAL (vno->op[i]); |
| 4310 | |
| 4311 | vno->hashcode = vn_nary_op_compute_hash (vno); |
| 4312 | slot = valid_info->nary->find_slot_with_hash (vno, vno->hashcode, NO_INSERT); |
| 4313 | if (!slot) |
| 4314 | return NULL_TREE(tree) nullptr; |
| 4315 | if (vnresult) |
| 4316 | *vnresult = *slot; |
| 4317 | return (*slot)->predicated_values ? NULL_TREE(tree) nullptr : (*slot)->u.result; |
| 4318 | } |
| 4319 | |
| 4320 | /* Lookup a n-ary operation by its pieces and return the resulting value |
| 4321 | number if it exists in the hash table. Return NULL_TREE if it does |
| 4322 | not exist in the hash table or if the result field of the operation |
| 4323 | is NULL. VNRESULT will contain the vn_nary_op_t from the hashtable |
| 4324 | if it exists. */ |
| 4325 | |
| 4326 | tree |
| 4327 | vn_nary_op_lookup_pieces (unsigned int length, enum tree_code code, |
| 4328 | tree type, tree *ops, vn_nary_op_t *vnresult) |
| 4329 | { |
| 4330 | vn_nary_op_t vno1 = XALLOCAVAR (struct vn_nary_op_s,((struct vn_nary_op_s *) __builtin_alloca((sizeof_vn_nary_op ( length)))) |
| 4331 | sizeof_vn_nary_op (length))((struct vn_nary_op_s *) __builtin_alloca((sizeof_vn_nary_op ( length)))); |
| 4332 | init_vn_nary_op_from_pieces (vno1, length, code, type, ops); |
| 4333 | return vn_nary_op_lookup_1 (vno1, vnresult); |
| 4334 | } |
| 4335 | |
| 4336 | /* Lookup the rhs of STMT in the current hash table, and return the resulting |
| 4337 | value number if it exists in the hash table. Return NULL_TREE if |
| 4338 | it does not exist in the hash table. VNRESULT will contain the |
| 4339 | vn_nary_op_t from the hashtable if it exists. */ |
| 4340 | |
| 4341 | tree |
| 4342 | vn_nary_op_lookup_stmt (gimple *stmt, vn_nary_op_t *vnresult) |
| 4343 | { |
| 4344 | vn_nary_op_t vno1 |
| 4345 | = XALLOCAVAR (struct vn_nary_op_s,((struct vn_nary_op_s *) __builtin_alloca((sizeof_vn_nary_op ( vn_nary_length_from_stmt (stmt))))) |
| 4346 | sizeof_vn_nary_op (vn_nary_length_from_stmt (stmt)))((struct vn_nary_op_s *) __builtin_alloca((sizeof_vn_nary_op ( vn_nary_length_from_stmt (stmt))))); |
| 4347 | init_vn_nary_op_from_stmt (vno1, as_a <gassign *> (stmt)); |
| 4348 | return vn_nary_op_lookup_1 (vno1, vnresult); |
| 4349 | } |
| 4350 | |
| 4351 | /* Allocate a vn_nary_op_t with LENGTH operands on STACK. */ |
| 4352 | |
| 4353 | vn_nary_op_t |
| 4354 | alloc_vn_nary_op_noinit (unsigned int length, struct obstack *stack) |
| 4355 | { |
| 4356 | return (vn_nary_op_t) obstack_alloc (stack, sizeof_vn_nary_op (length))__extension__ ({ struct obstack *__h = (stack); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof_vn_nary_op (length))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o )->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1->object_base ; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); }); |
| 4357 | } |
| 4358 | |
| 4359 | /* Allocate and initialize a vn_nary_op_t on CURRENT_INFO's |
| 4360 | obstack. */ |
| 4361 | |
| 4362 | static vn_nary_op_t |
| 4363 | alloc_vn_nary_op (unsigned int length, tree result, unsigned int value_id) |
| 4364 | { |
| 4365 | vn_nary_op_t vno1 = alloc_vn_nary_op_noinit (length, &vn_tables_obstack); |
| 4366 | |
| 4367 | vno1->value_id = value_id; |
| 4368 | vno1->length = length; |
| 4369 | vno1->predicated_values = 0; |
| 4370 | vno1->u.result = result; |
| 4371 | |
| 4372 | return vno1; |
| 4373 | } |
| 4374 | |
| 4375 | /* Insert VNO into TABLE. */ |
| 4376 | |
| 4377 | static vn_nary_op_t |
| 4378 | vn_nary_op_insert_into (vn_nary_op_t vno, vn_nary_op_table_type *table) |
| 4379 | { |
| 4380 | vn_nary_op_s **slot; |
| 4381 | |
| 4382 | gcc_assert (! vno->predicated_values((void)(!(! vno->predicated_values || (! vno->u.values-> next && vno->u.values->n == 1)) ? fancy_abort ( "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4384, __FUNCTION__), 0 : 0)) |
| 4383 | || (! vno->u.values->next((void)(!(! vno->predicated_values || (! vno->u.values-> next && vno->u.values->n == 1)) ? fancy_abort ( "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4384, __FUNCTION__), 0 : 0)) |
| 4384 | && vno->u.values->n == 1))((void)(!(! vno->predicated_values || (! vno->u.values-> next && vno->u.values->n == 1)) ? fancy_abort ( "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4384, __FUNCTION__), 0 : 0)); |
| 4385 | |
| 4386 | for (unsigned i = 0; i < vno->length; ++i) |
| 4387 | if (TREE_CODE (vno->op[i])((enum tree_code) (vno->op[i])->base.code) == SSA_NAME) |
| 4388 | vno->op[i] = SSA_VAL (vno->op[i]); |
| 4389 | |
| 4390 | vno->hashcode = vn_nary_op_compute_hash (vno); |
| 4391 | slot = table->find_slot_with_hash (vno, vno->hashcode, INSERT); |
| 4392 | vno->unwind_to = *slot; |
| 4393 | if (*slot) |
| 4394 | { |
| 4395 | /* Prefer non-predicated values. |
| 4396 | ??? Only if those are constant, otherwise, with constant predicated |
| 4397 | value, turn them into predicated values with entry-block validity |
| 4398 | (??? but we always find the first valid result currently). */ |
| 4399 | if ((*slot)->predicated_values |
| 4400 | && ! vno->predicated_values) |
| 4401 | { |
| 4402 | /* ??? We cannot remove *slot from the unwind stack list. |
| 4403 | For the moment we deal with this by skipping not found |
| 4404 | entries but this isn't ideal ... */ |
| 4405 | *slot = vno; |
| 4406 | /* ??? Maintain a stack of states we can unwind in |
| 4407 | vn_nary_op_s? But how far do we unwind? In reality |
| 4408 | we need to push change records somewhere... Or not |
| 4409 | unwind vn_nary_op_s and linking them but instead |
| 4410 | unwind the results "list", linking that, which also |
| 4411 | doesn't move on hashtable resize. */ |
| 4412 | /* We can also have a ->unwind_to recording *slot there. |
| 4413 | That way we can make u.values a fixed size array with |
| 4414 | recording the number of entries but of course we then |
| 4415 | have always N copies for each unwind_to-state. Or we |
| 4416 | make sure to only ever append and each unwinding will |
| 4417 | pop off one entry (but how to deal with predicated |
| 4418 | replaced with non-predicated here?) */ |
| 4419 | vno->next = last_inserted_nary; |
| 4420 | last_inserted_nary = vno; |
| 4421 | return vno; |
| 4422 | } |
| 4423 | else if (vno->predicated_values |
| 4424 | && ! (*slot)->predicated_values) |
| 4425 | return *slot; |
| 4426 | else if (vno->predicated_values |
| 4427 | && (*slot)->predicated_values) |
| 4428 | { |
| 4429 | /* ??? Factor this all into a insert_single_predicated_value |
| 4430 | routine. */ |
| 4431 | gcc_assert (!vno->u.values->next && vno->u.values->n == 1)((void)(!(!vno->u.values->next && vno->u.values ->n == 1) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4431, __FUNCTION__), 0 : 0)); |
| 4432 | basic_block vno_bb |
| 4433 | = BASIC_BLOCK_FOR_FN (cfun, vno->u.values->valid_dominated_by_p[0])((*(((cfun + 0))->cfg->x_basic_block_info))[(vno->u. values->valid_dominated_by_p[0])]); |
| 4434 | vn_pval *nval = vno->u.values; |
| 4435 | vn_pval **next = &vno->u.values; |
| 4436 | bool found = false; |
| 4437 | for (vn_pval *val = (*slot)->u.values; val; val = val->next) |
| 4438 | { |
| 4439 | if (expressions_equal_p (val->result, nval->result)) |
| 4440 | { |
| 4441 | found = true; |
| 4442 | for (unsigned i = 0; i < val->n; ++i) |
| 4443 | { |
| 4444 | basic_block val_bb |
| 4445 | = BASIC_BLOCK_FOR_FN (cfun,((*(((cfun + 0))->cfg->x_basic_block_info))[(val->valid_dominated_by_p [i])]) |
| 4446 | val->valid_dominated_by_p[i])((*(((cfun + 0))->cfg->x_basic_block_info))[(val->valid_dominated_by_p [i])]); |
| 4447 | if (dominated_by_p (CDI_DOMINATORS, vno_bb, val_bb)) |
| 4448 | /* Value registered with more generic predicate. */ |
| 4449 | return *slot; |
| 4450 | else if (flag_checkingglobal_options.x_flag_checking) |
| 4451 | /* Shouldn't happen, we insert in RPO order. */ |
| 4452 | gcc_assert (!dominated_by_p (CDI_DOMINATORS,((void)(!(!dominated_by_p (CDI_DOMINATORS, val_bb, vno_bb)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4453, __FUNCTION__), 0 : 0)) |
| 4453 | val_bb, vno_bb))((void)(!(!dominated_by_p (CDI_DOMINATORS, val_bb, vno_bb)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4453, __FUNCTION__), 0 : 0)); |
| 4454 | } |
| 4455 | /* Append value. */ |
| 4456 | *next = (vn_pval *) obstack_alloc (&vn_tables_obstack,__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_pval) + val->n * sizeof (int))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o , __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1 ->object_base; if (__o1->next_free == __value) __o1-> maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t ) < sizeof (void *) ? ((__o1->object_base) + (((__o1-> next_free) - (__o1->object_base) + (__o1->alignment_mask )) & ~(__o1->alignment_mask))) : (char *) (((ptrdiff_t ) (__o1->next_free) + (__o1->alignment_mask)) & ~(__o1 ->alignment_mask))); if ((size_t) (__o1->next_free - (char *) __o1->chunk) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk)) __o1->next_free = __o1->chunk_limit ; __o1->object_base = __o1->next_free; __value; }); }) |
| 4457 | sizeof (vn_pval)__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_pval) + val->n * sizeof (int))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o , __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1 ->object_base; if (__o1->next_free == __value) __o1-> maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t ) < sizeof (void *) ? ((__o1->object_base) + (((__o1-> next_free) - (__o1->object_base) + (__o1->alignment_mask )) & ~(__o1->alignment_mask))) : (char *) (((ptrdiff_t ) (__o1->next_free) + (__o1->alignment_mask)) & ~(__o1 ->alignment_mask))); if ((size_t) (__o1->next_free - (char *) __o1->chunk) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk)) __o1->next_free = __o1->chunk_limit ; __o1->object_base = __o1->next_free; __value; }); }) |
| 4458 | + val->n * sizeof (int))__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_pval) + val->n * sizeof (int))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o , __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1 ->object_base; if (__o1->next_free == __value) __o1-> maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t ) < sizeof (void *) ? ((__o1->object_base) + (((__o1-> next_free) - (__o1->object_base) + (__o1->alignment_mask )) & ~(__o1->alignment_mask))) : (char *) (((ptrdiff_t ) (__o1->next_free) + (__o1->alignment_mask)) & ~(__o1 ->alignment_mask))); if ((size_t) (__o1->next_free - (char *) __o1->chunk) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk)) __o1->next_free = __o1->chunk_limit ; __o1->object_base = __o1->next_free; __value; }); }); |
| 4459 | (*next)->next = NULLnullptr; |
| 4460 | (*next)->result = val->result; |
| 4461 | (*next)->n = val->n + 1; |
| 4462 | memcpy ((*next)->valid_dominated_by_p, |
| 4463 | val->valid_dominated_by_p, |
| 4464 | val->n * sizeof (int)); |
| 4465 | (*next)->valid_dominated_by_p[val->n] = vno_bb->index; |
| 4466 | next = &(*next)->next; |
| 4467 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 4468 | fprintf (dump_file, "Appending predicate to value.\n"); |
| 4469 | continue; |
| 4470 | } |
| 4471 | /* Copy other predicated values. */ |
| 4472 | *next = (vn_pval *) obstack_alloc (&vn_tables_obstack,__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_pval) + (val->n-1) * sizeof (int))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o , __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1 ->object_base; if (__o1->next_free == __value) __o1-> maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t ) < sizeof (void *) ? ((__o1->object_base) + (((__o1-> next_free) - (__o1->object_base) + (__o1->alignment_mask )) & ~(__o1->alignment_mask))) : (char *) (((ptrdiff_t ) (__o1->next_free) + (__o1->alignment_mask)) & ~(__o1 ->alignment_mask))); if ((size_t) (__o1->next_free - (char *) __o1->chunk) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk)) __o1->next_free = __o1->chunk_limit ; __o1->object_base = __o1->next_free; __value; }); }) |
| 4473 | sizeof (vn_pval)__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_pval) + (val->n-1) * sizeof (int))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o , __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1 ->object_base; if (__o1->next_free == __value) __o1-> maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t ) < sizeof (void *) ? ((__o1->object_base) + (((__o1-> next_free) - (__o1->object_base) + (__o1->alignment_mask )) & ~(__o1->alignment_mask))) : (char *) (((ptrdiff_t ) (__o1->next_free) + (__o1->alignment_mask)) & ~(__o1 ->alignment_mask))); if ((size_t) (__o1->next_free - (char *) __o1->chunk) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk)) __o1->next_free = __o1->chunk_limit ; __o1->object_base = __o1->next_free; __value; }); }) |
| 4474 | + (val->n-1) * sizeof (int))__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_pval) + (val->n-1) * sizeof (int))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o , __len); ((void) ((__o)->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1 ->object_base; if (__o1->next_free == __value) __o1-> maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t ) < sizeof (void *) ? ((__o1->object_base) + (((__o1-> next_free) - (__o1->object_base) + (__o1->alignment_mask )) & ~(__o1->alignment_mask))) : (char *) (((ptrdiff_t ) (__o1->next_free) + (__o1->alignment_mask)) & ~(__o1 ->alignment_mask))); if ((size_t) (__o1->next_free - (char *) __o1->chunk) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk)) __o1->next_free = __o1->chunk_limit ; __o1->object_base = __o1->next_free; __value; }); }); |
| 4475 | memcpy (*next, val, sizeof (vn_pval) + (val->n-1) * sizeof (int)); |
| 4476 | (*next)->next = NULLnullptr; |
| 4477 | next = &(*next)->next; |
| 4478 | } |
| 4479 | if (!found) |
| 4480 | *next = nval; |
| 4481 | |
| 4482 | *slot = vno; |
| 4483 | vno->next = last_inserted_nary; |
| 4484 | last_inserted_nary = vno; |
| 4485 | return vno; |
| 4486 | } |
| 4487 | |
| 4488 | /* While we do not want to insert things twice it's awkward to |
| 4489 | avoid it in the case where visit_nary_op pattern-matches stuff |
| 4490 | and ends up simplifying the replacement to itself. We then |
| 4491 | get two inserts, one from visit_nary_op and one from |
| 4492 | vn_nary_build_or_lookup. |
| 4493 | So allow inserts with the same value number. */ |
| 4494 | if ((*slot)->u.result == vno->u.result) |
| 4495 | return *slot; |
| 4496 | } |
| 4497 | |
| 4498 | /* ??? There's also optimistic vs. previous commited state merging |
| 4499 | that is problematic for the case of unwinding. */ |
| 4500 | |
| 4501 | /* ??? We should return NULL if we do not use 'vno' and have the |
| 4502 | caller release it. */ |
| 4503 | gcc_assert (!*slot)((void)(!(!*slot) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4503, __FUNCTION__), 0 : 0)); |
| 4504 | |
| 4505 | *slot = vno; |
| 4506 | vno->next = last_inserted_nary; |
| 4507 | last_inserted_nary = vno; |
| 4508 | return vno; |
| 4509 | } |
| 4510 | |
| 4511 | /* Insert a n-ary operation into the current hash table using it's |
| 4512 | pieces. Return the vn_nary_op_t structure we created and put in |
| 4513 | the hashtable. */ |
| 4514 | |
| 4515 | vn_nary_op_t |
| 4516 | vn_nary_op_insert_pieces (unsigned int length, enum tree_code code, |
| 4517 | tree type, tree *ops, |
| 4518 | tree result, unsigned int value_id) |
| 4519 | { |
| 4520 | vn_nary_op_t vno1 = alloc_vn_nary_op (length, result, value_id); |
| 4521 | init_vn_nary_op_from_pieces (vno1, length, code, type, ops); |
| 4522 | return vn_nary_op_insert_into (vno1, valid_info->nary); |
| 4523 | } |
| 4524 | |
| 4525 | /* Return whether we can track a predicate valid when PRED_E is executed. */ |
| 4526 | |
| 4527 | static bool |
| 4528 | can_track_predicate_on_edge (edge pred_e) |
| 4529 | { |
| 4530 | /* ??? As we are currently recording the destination basic-block index in |
| 4531 | vn_pval.valid_dominated_by_p and using dominance for the |
| 4532 | validity check we cannot track predicates on all edges. */ |
| 4533 | if (single_pred_p (pred_e->dest)) |
| 4534 | return true; |
| 4535 | /* Never record for backedges. */ |
| 4536 | if (pred_e->flags & EDGE_DFS_BACK) |
| 4537 | return false; |
| 4538 | /* When there's more than one predecessor we cannot track |
| 4539 | predicate validity based on the destination block. The |
| 4540 | exception is when all other incoming edges sources are |
| 4541 | dominated by the destination block. */ |
| 4542 | edge_iterator ei; |
| 4543 | edge e; |
| 4544 | FOR_EACH_EDGE (e, ei, pred_e->dest->preds)for ((ei) = ei_start_1 (&((pred_e->dest->preds))); ei_cond ((ei), &(e)); ei_next (&(ei))) |
| 4545 | if (e != pred_e && ! dominated_by_p (CDI_DOMINATORS, e->src, e->dest)) |
| 4546 | return false; |
| 4547 | return true; |
| 4548 | } |
| 4549 | |
| 4550 | static vn_nary_op_t |
| 4551 | vn_nary_op_insert_pieces_predicated (unsigned int length, enum tree_code code, |
| 4552 | tree type, tree *ops, |
| 4553 | tree result, unsigned int value_id, |
| 4554 | edge pred_e) |
| 4555 | { |
| 4556 | gcc_assert (can_track_predicate_on_edge (pred_e))((void)(!(can_track_predicate_on_edge (pred_e)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4556, __FUNCTION__), 0 : 0)); |
| 4557 | |
| 4558 | if (dump_file && (dump_flags & TDF_DETAILS) |
| 4559 | /* ??? Fix dumping, but currently we only get comparisons. */ |
| 4560 | && TREE_CODE_CLASS (code)tree_code_type_tmpl <0>::tree_code_type[(int) (code)] == tcc_comparison) |
| 4561 | { |
| 4562 | fprintf (dump_file, "Recording on edge %d->%d ", pred_e->src->index, |
| 4563 | pred_e->dest->index); |
| 4564 | print_generic_expr (dump_file, ops[0], TDF_SLIM); |
| 4565 | fprintf (dump_file, " %s ", get_tree_code_name (code)); |
| 4566 | print_generic_expr (dump_file, ops[1], TDF_SLIM); |
| 4567 | fprintf (dump_file, " == %s\n", |
| 4568 | integer_zerop (result) ? "false" : "true"); |
| 4569 | } |
| 4570 | vn_nary_op_t vno1 = alloc_vn_nary_op (length, NULL_TREE(tree) nullptr, value_id); |
| 4571 | init_vn_nary_op_from_pieces (vno1, length, code, type, ops); |
| 4572 | vno1->predicated_values = 1; |
| 4573 | vno1->u.values = (vn_pval *) obstack_alloc (&vn_tables_obstack,__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_pval))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free ); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o )->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1->object_base ; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); }) |
| 4574 | sizeof (vn_pval))__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_pval))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free ); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o )->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1->object_base ; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); }); |
| 4575 | vno1->u.values->next = NULLnullptr; |
| 4576 | vno1->u.values->result = result; |
| 4577 | vno1->u.values->n = 1; |
| 4578 | vno1->u.values->valid_dominated_by_p[0] = pred_e->dest->index; |
| 4579 | return vn_nary_op_insert_into (vno1, valid_info->nary); |
| 4580 | } |
| 4581 | |
| 4582 | static bool |
| 4583 | dominated_by_p_w_unex (basic_block bb1, basic_block bb2, bool); |
| 4584 | |
| 4585 | static tree |
| 4586 | vn_nary_op_get_predicated_value (vn_nary_op_t vno, basic_block bb) |
| 4587 | { |
| 4588 | if (! vno->predicated_values) |
| 4589 | return vno->u.result; |
| 4590 | for (vn_pval *val = vno->u.values; val; val = val->next) |
| 4591 | for (unsigned i = 0; i < val->n; ++i) |
| 4592 | /* Do not handle backedge executability optimistically since |
| 4593 | when figuring out whether to iterate we do not consider |
| 4594 | changed predication. */ |
| 4595 | if (dominated_by_p_w_unex |
| 4596 | (bb, BASIC_BLOCK_FOR_FN (cfun, val->valid_dominated_by_p[i])((*(((cfun + 0))->cfg->x_basic_block_info))[(val->valid_dominated_by_p [i])]), |
| 4597 | false)) |
| 4598 | return val->result; |
| 4599 | return NULL_TREE(tree) nullptr; |
| 4600 | } |
| 4601 | |
| 4602 | /* Insert the rhs of STMT into the current hash table with a value number of |
| 4603 | RESULT. */ |
| 4604 | |
| 4605 | static vn_nary_op_t |
| 4606 | vn_nary_op_insert_stmt (gimple *stmt, tree result) |
| 4607 | { |
| 4608 | vn_nary_op_t vno1 |
| 4609 | = alloc_vn_nary_op (vn_nary_length_from_stmt (stmt), |
| 4610 | result, VN_INFO (result)->value_id); |
| 4611 | init_vn_nary_op_from_stmt (vno1, as_a <gassign *> (stmt)); |
| 4612 | return vn_nary_op_insert_into (vno1, valid_info->nary); |
| 4613 | } |
| 4614 | |
| 4615 | /* Compute a hashcode for PHI operation VP1 and return it. */ |
| 4616 | |
| 4617 | static inline hashval_t |
| 4618 | vn_phi_compute_hash (vn_phi_t vp1) |
| 4619 | { |
| 4620 | inchash::hash hstate; |
| 4621 | tree phi1op; |
| 4622 | tree type; |
| 4623 | edge e; |
| 4624 | edge_iterator ei; |
| 4625 | |
| 4626 | hstate.add_int (EDGE_COUNT (vp1->block->preds)vec_safe_length (vp1->block->preds)); |
| 4627 | switch (EDGE_COUNT (vp1->block->preds)vec_safe_length (vp1->block->preds)) |
| 4628 | { |
| 4629 | case 1: |
| 4630 | break; |
| 4631 | case 2: |
| 4632 | /* When this is a PHI node subject to CSE for different blocks |
| 4633 | avoid hashing the block index. */ |
| 4634 | if (vp1->cclhs) |
| 4635 | break; |
| 4636 | /* Fallthru. */ |
| 4637 | default: |
| 4638 | hstate.add_int (vp1->block->index); |
| 4639 | } |
| 4640 | |
| 4641 | /* If all PHI arguments are constants we need to distinguish |
| 4642 | the PHI node via its type. */ |
| 4643 | type = vp1->type; |
| 4644 | hstate.merge_hash (vn_hash_type (type)); |
| 4645 | |
| 4646 | FOR_EACH_EDGE (e, ei, vp1->block->preds)for ((ei) = ei_start_1 (&((vp1->block->preds))); ei_cond ((ei), &(e)); ei_next (&(ei))) |
| 4647 | { |
| 4648 | /* Don't hash backedge values they need to be handled as VN_TOP |
| 4649 | for optimistic value-numbering. */ |
| 4650 | if (e->flags & EDGE_DFS_BACK) |
| 4651 | continue; |
| 4652 | |
| 4653 | phi1op = vp1->phiargs[e->dest_idx]; |
| 4654 | if (phi1op == VN_TOP) |
| 4655 | continue; |
| 4656 | inchash::add_expr (phi1op, hstate); |
| 4657 | } |
| 4658 | |
| 4659 | return hstate.end (); |
| 4660 | } |
| 4661 | |
| 4662 | |
| 4663 | /* Return true if COND1 and COND2 represent the same condition, set |
| 4664 | *INVERTED_P if one needs to be inverted to make it the same as |
| 4665 | the other. */ |
| 4666 | |
| 4667 | static bool |
| 4668 | cond_stmts_equal_p (gcond *cond1, tree lhs1, tree rhs1, |
| 4669 | gcond *cond2, tree lhs2, tree rhs2, bool *inverted_p) |
| 4670 | { |
| 4671 | enum tree_code code1 = gimple_cond_code (cond1); |
| 4672 | enum tree_code code2 = gimple_cond_code (cond2); |
| 4673 | |
| 4674 | *inverted_p = false; |
| 4675 | if (code1 == code2) |
| 4676 | ; |
| 4677 | else if (code1 == swap_tree_comparison (code2)) |
| 4678 | std::swap (lhs2, rhs2); |
| 4679 | else if (code1 == invert_tree_comparison (code2, HONOR_NANS (lhs2))) |
| 4680 | *inverted_p = true; |
| 4681 | else if (code1 == invert_tree_comparison |
| 4682 | (swap_tree_comparison (code2), HONOR_NANS (lhs2))) |
| 4683 | { |
| 4684 | std::swap (lhs2, rhs2); |
| 4685 | *inverted_p = true; |
| 4686 | } |
| 4687 | else |
| 4688 | return false; |
| 4689 | |
| 4690 | return ((expressions_equal_p (lhs1, lhs2) |
| 4691 | && expressions_equal_p (rhs1, rhs2)) |
| 4692 | || (commutative_tree_code (code1) |
| 4693 | && expressions_equal_p (lhs1, rhs2) |
| 4694 | && expressions_equal_p (rhs1, lhs2))); |
| 4695 | } |
| 4696 | |
| 4697 | /* Compare two phi entries for equality, ignoring VN_TOP arguments. */ |
| 4698 | |
| 4699 | static int |
| 4700 | vn_phi_eq (const_vn_phi_t const vp1, const_vn_phi_t const vp2) |
| 4701 | { |
| 4702 | if (vp1->hashcode != vp2->hashcode) |
| 4703 | return false; |
| 4704 | |
| 4705 | if (vp1->block != vp2->block) |
| 4706 | { |
| 4707 | if (EDGE_COUNT (vp1->block->preds)vec_safe_length (vp1->block->preds) != EDGE_COUNT (vp2->block->preds)vec_safe_length (vp2->block->preds)) |
| 4708 | return false; |
| 4709 | |
| 4710 | switch (EDGE_COUNT (vp1->block->preds)vec_safe_length (vp1->block->preds)) |
| 4711 | { |
| 4712 | case 1: |
| 4713 | /* Single-arg PHIs are just copies. */ |
| 4714 | break; |
| 4715 | |
| 4716 | case 2: |
| 4717 | { |
| 4718 | /* Make sure both PHIs are classified as CSEable. */ |
| 4719 | if (! vp1->cclhs || ! vp2->cclhs) |
| 4720 | return false; |
| 4721 | |
| 4722 | /* Rule out backedges into the PHI. */ |
| 4723 | gcc_checking_assert((void)(!(vp1->block->loop_father->header != vp1-> block && vp2->block->loop_father->header != vp2 ->block) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4725, __FUNCTION__), 0 : 0)) |
| 4724 | (vp1->block->loop_father->header != vp1->block((void)(!(vp1->block->loop_father->header != vp1-> block && vp2->block->loop_father->header != vp2 ->block) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4725, __FUNCTION__), 0 : 0)) |
| 4725 | && vp2->block->loop_father->header != vp2->block)((void)(!(vp1->block->loop_father->header != vp1-> block && vp2->block->loop_father->header != vp2 ->block) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4725, __FUNCTION__), 0 : 0)); |
| 4726 | |
| 4727 | /* If the PHI nodes do not have compatible types |
| 4728 | they are not the same. */ |
| 4729 | if (!types_compatible_p (vp1->type, vp2->type)) |
| 4730 | return false; |
| 4731 | |
| 4732 | /* If the immediate dominator end in switch stmts multiple |
| 4733 | values may end up in the same PHI arg via intermediate |
| 4734 | CFG merges. */ |
| 4735 | basic_block idom1 |
| 4736 | = get_immediate_dominator (CDI_DOMINATORS, vp1->block); |
| 4737 | basic_block idom2 |
| 4738 | = get_immediate_dominator (CDI_DOMINATORS, vp2->block); |
| 4739 | gcc_checking_assert (EDGE_COUNT (idom1->succs) == 2((void)(!(vec_safe_length (idom1->succs) == 2 && vec_safe_length (idom2->succs) == 2) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4740, __FUNCTION__), 0 : 0)) |
| 4740 | && EDGE_COUNT (idom2->succs) == 2)((void)(!(vec_safe_length (idom1->succs) == 2 && vec_safe_length (idom2->succs) == 2) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4740, __FUNCTION__), 0 : 0)); |
| 4741 | |
| 4742 | /* Verify the controlling stmt is the same. */ |
| 4743 | gcond *last1 = as_a <gcond *> (last_stmt (idom1)); |
| 4744 | gcond *last2 = as_a <gcond *> (last_stmt (idom2)); |
| 4745 | bool inverted_p; |
| 4746 | if (! cond_stmts_equal_p (last1, vp1->cclhs, vp1->ccrhs, |
| 4747 | last2, vp2->cclhs, vp2->ccrhs, |
| 4748 | &inverted_p)) |
| 4749 | return false; |
| 4750 | |
| 4751 | /* Get at true/false controlled edges into the PHI. */ |
| 4752 | edge te1, te2, fe1, fe2; |
| 4753 | if (! extract_true_false_controlled_edges (idom1, vp1->block, |
| 4754 | &te1, &fe1) |
| 4755 | || ! extract_true_false_controlled_edges (idom2, vp2->block, |
| 4756 | &te2, &fe2)) |
| 4757 | return false; |
| 4758 | |
| 4759 | /* Swap edges if the second condition is the inverted of the |
| 4760 | first. */ |
| 4761 | if (inverted_p) |
| 4762 | std::swap (te2, fe2); |
| 4763 | |
| 4764 | /* Since we do not know which edge will be executed we have |
| 4765 | to be careful when matching VN_TOP. Be conservative and |
| 4766 | only match VN_TOP == VN_TOP for now, we could allow |
| 4767 | VN_TOP on the not prevailing PHI though. See for example |
| 4768 | PR102920. */ |
| 4769 | if (! expressions_equal_p (vp1->phiargs[te1->dest_idx], |
| 4770 | vp2->phiargs[te2->dest_idx], false) |
| 4771 | || ! expressions_equal_p (vp1->phiargs[fe1->dest_idx], |
| 4772 | vp2->phiargs[fe2->dest_idx], false)) |
| 4773 | return false; |
| 4774 | |
| 4775 | return true; |
| 4776 | } |
| 4777 | |
| 4778 | default: |
| 4779 | return false; |
| 4780 | } |
| 4781 | } |
| 4782 | |
| 4783 | /* If the PHI nodes do not have compatible types |
| 4784 | they are not the same. */ |
| 4785 | if (!types_compatible_p (vp1->type, vp2->type)) |
| 4786 | return false; |
| 4787 | |
| 4788 | /* Any phi in the same block will have it's arguments in the |
| 4789 | same edge order, because of how we store phi nodes. */ |
| 4790 | unsigned nargs = EDGE_COUNT (vp1->block->preds)vec_safe_length (vp1->block->preds); |
| 4791 | for (unsigned i = 0; i < nargs; ++i) |
| 4792 | { |
| 4793 | tree phi1op = vp1->phiargs[i]; |
| 4794 | tree phi2op = vp2->phiargs[i]; |
| 4795 | if (phi1op == phi2op) |
| 4796 | continue; |
| 4797 | if (!expressions_equal_p (phi1op, phi2op, false)) |
| 4798 | return false; |
| 4799 | } |
| 4800 | |
| 4801 | return true; |
| 4802 | } |
| 4803 | |
| 4804 | /* Lookup PHI in the current hash table, and return the resulting |
| 4805 | value number if it exists in the hash table. Return NULL_TREE if |
| 4806 | it does not exist in the hash table. */ |
| 4807 | |
| 4808 | static tree |
| 4809 | vn_phi_lookup (gimple *phi, bool backedges_varying_p) |
| 4810 | { |
| 4811 | vn_phi_s **slot; |
| 4812 | struct vn_phi_s *vp1; |
| 4813 | edge e; |
| 4814 | edge_iterator ei; |
| 4815 | |
| 4816 | vp1 = XALLOCAVAR (struct vn_phi_s,((struct vn_phi_s *) __builtin_alloca((sizeof (struct vn_phi_s ) + (gimple_phi_num_args (phi) - 1) * sizeof (tree)))) |
| 4817 | sizeof (struct vn_phi_s)((struct vn_phi_s *) __builtin_alloca((sizeof (struct vn_phi_s ) + (gimple_phi_num_args (phi) - 1) * sizeof (tree)))) |
| 4818 | + (gimple_phi_num_args (phi) - 1) * sizeof (tree))((struct vn_phi_s *) __builtin_alloca((sizeof (struct vn_phi_s ) + (gimple_phi_num_args (phi) - 1) * sizeof (tree)))); |
| 4819 | |
| 4820 | /* Canonicalize the SSA_NAME's to their value number. */ |
| 4821 | FOR_EACH_EDGE (e, ei, gimple_bb (phi)->preds)for ((ei) = ei_start_1 (&((gimple_bb (phi)->preds))); ei_cond ((ei), &(e)); ei_next (&(ei))) |
| 4822 | { |
| 4823 | tree def = PHI_ARG_DEF_FROM_EDGE (phi, e)gimple_phi_arg_def (((phi)), ((e)->dest_idx)); |
| 4824 | if (TREE_CODE (def)((enum tree_code) (def)->base.code) == SSA_NAME |
| 4825 | && (!backedges_varying_p || !(e->flags & EDGE_DFS_BACK))) |
| 4826 | { |
| 4827 | if (!virtual_operand_p (def) |
| 4828 | && ssa_undefined_value_p (def, false)) |
| 4829 | def = VN_TOP; |
| 4830 | else |
| 4831 | def = SSA_VAL (def); |
| 4832 | } |
| 4833 | vp1->phiargs[e->dest_idx] = def; |
| 4834 | } |
| 4835 | vp1->type = TREE_TYPE (gimple_phi_result (phi))((contains_struct_check ((gimple_phi_result (phi)), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4835, __FUNCTION__))->typed.type); |
| 4836 | vp1->block = gimple_bb (phi); |
| 4837 | /* Extract values of the controlling condition. */ |
| 4838 | vp1->cclhs = NULL_TREE(tree) nullptr; |
| 4839 | vp1->ccrhs = NULL_TREE(tree) nullptr; |
| 4840 | if (EDGE_COUNT (vp1->block->preds)vec_safe_length (vp1->block->preds) == 2 |
| 4841 | && vp1->block->loop_father->header != vp1->block) |
| 4842 | { |
| 4843 | basic_block idom1 = get_immediate_dominator (CDI_DOMINATORS, vp1->block); |
| 4844 | if (EDGE_COUNT (idom1->succs)vec_safe_length (idom1->succs) == 2) |
| 4845 | if (gcond *last1 = safe_dyn_cast <gcond *> (last_stmt (idom1))) |
| 4846 | { |
| 4847 | /* ??? We want to use SSA_VAL here. But possibly not |
| 4848 | allow VN_TOP. */ |
| 4849 | vp1->cclhs = vn_valueize (gimple_cond_lhs (last1)); |
| 4850 | vp1->ccrhs = vn_valueize (gimple_cond_rhs (last1)); |
| 4851 | } |
| 4852 | } |
| 4853 | vp1->hashcode = vn_phi_compute_hash (vp1); |
| 4854 | slot = valid_info->phis->find_slot_with_hash (vp1, vp1->hashcode, NO_INSERT); |
| 4855 | if (!slot) |
| 4856 | return NULL_TREE(tree) nullptr; |
| 4857 | return (*slot)->result; |
| 4858 | } |
| 4859 | |
| 4860 | /* Insert PHI into the current hash table with a value number of |
| 4861 | RESULT. */ |
| 4862 | |
| 4863 | static vn_phi_t |
| 4864 | vn_phi_insert (gimple *phi, tree result, bool backedges_varying_p) |
| 4865 | { |
| 4866 | vn_phi_s **slot; |
| 4867 | vn_phi_t vp1 = (vn_phi_t) obstack_alloc (&vn_tables_obstack,__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_phi_s) + ((gimple_phi_num_args (phi) - 1) * sizeof (tree)))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o )->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1->object_base ; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); }) |
| 4868 | sizeof (vn_phi_s)__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_phi_s) + ((gimple_phi_num_args (phi) - 1) * sizeof (tree)))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o )->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1->object_base ; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); }) |
| 4869 | + ((gimple_phi_num_args (phi) - 1)__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_phi_s) + ((gimple_phi_num_args (phi) - 1) * sizeof (tree)))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o )->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1->object_base ; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); }) |
| 4870 | * sizeof (tree)))__extension__ ({ struct obstack *__h = (&vn_tables_obstack ); __extension__ ({ struct obstack *__o = (__h); size_t __len = ((sizeof (vn_phi_s) + ((gimple_phi_num_args (phi) - 1) * sizeof (tree)))); if (__extension__ ({ struct obstack const *__o1 = (__o); (size_t) (__o1->chunk_limit - __o1->next_free); }) < __len) _obstack_newchunk (__o, __len); ((void) ((__o )->next_free += (__len))); }); __extension__ ({ struct obstack *__o1 = (__h); void *__value = (void *) __o1->object_base ; if (__o1->next_free == __value) __o1->maybe_empty_object = 1; __o1->next_free = (sizeof (ptrdiff_t) < sizeof (void *) ? ((__o1->object_base) + (((__o1->next_free) - (__o1 ->object_base) + (__o1->alignment_mask)) & ~(__o1-> alignment_mask))) : (char *) (((ptrdiff_t) (__o1->next_free ) + (__o1->alignment_mask)) & ~(__o1->alignment_mask ))); if ((size_t) (__o1->next_free - (char *) __o1->chunk ) > (size_t) (__o1->chunk_limit - (char *) __o1->chunk )) __o1->next_free = __o1->chunk_limit; __o1->object_base = __o1->next_free; __value; }); }); |
| 4871 | edge e; |
| 4872 | edge_iterator ei; |
| 4873 | |
| 4874 | /* Canonicalize the SSA_NAME's to their value number. */ |
| 4875 | FOR_EACH_EDGE (e, ei, gimple_bb (phi)->preds)for ((ei) = ei_start_1 (&((gimple_bb (phi)->preds))); ei_cond ((ei), &(e)); ei_next (&(ei))) |
| 4876 | { |
| 4877 | tree def = PHI_ARG_DEF_FROM_EDGE (phi, e)gimple_phi_arg_def (((phi)), ((e)->dest_idx)); |
| 4878 | if (TREE_CODE (def)((enum tree_code) (def)->base.code) == SSA_NAME |
| 4879 | && (!backedges_varying_p || !(e->flags & EDGE_DFS_BACK))) |
| 4880 | { |
| 4881 | if (!virtual_operand_p (def) |
| 4882 | && ssa_undefined_value_p (def, false)) |
| 4883 | def = VN_TOP; |
| 4884 | else |
| 4885 | def = SSA_VAL (def); |
| 4886 | } |
| 4887 | vp1->phiargs[e->dest_idx] = def; |
| 4888 | } |
| 4889 | vp1->value_id = VN_INFO (result)->value_id; |
| 4890 | vp1->type = TREE_TYPE (gimple_phi_result (phi))((contains_struct_check ((gimple_phi_result (phi)), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4890, __FUNCTION__))->typed.type); |
| 4891 | vp1->block = gimple_bb (phi); |
| 4892 | /* Extract values of the controlling condition. */ |
| 4893 | vp1->cclhs = NULL_TREE(tree) nullptr; |
| 4894 | vp1->ccrhs = NULL_TREE(tree) nullptr; |
| 4895 | if (EDGE_COUNT (vp1->block->preds)vec_safe_length (vp1->block->preds) == 2 |
| 4896 | && vp1->block->loop_father->header != vp1->block) |
| 4897 | { |
| 4898 | basic_block idom1 = get_immediate_dominator (CDI_DOMINATORS, vp1->block); |
| 4899 | if (EDGE_COUNT (idom1->succs)vec_safe_length (idom1->succs) == 2) |
| 4900 | if (gcond *last1 = safe_dyn_cast <gcond *> (last_stmt (idom1))) |
| 4901 | { |
| 4902 | /* ??? We want to use SSA_VAL here. But possibly not |
| 4903 | allow VN_TOP. */ |
| 4904 | vp1->cclhs = vn_valueize (gimple_cond_lhs (last1)); |
| 4905 | vp1->ccrhs = vn_valueize (gimple_cond_rhs (last1)); |
| 4906 | } |
| 4907 | } |
| 4908 | vp1->result = result; |
| 4909 | vp1->hashcode = vn_phi_compute_hash (vp1); |
| 4910 | |
| 4911 | slot = valid_info->phis->find_slot_with_hash (vp1, vp1->hashcode, INSERT); |
| 4912 | gcc_assert (!*slot)((void)(!(!*slot) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 4912, __FUNCTION__), 0 : 0)); |
| 4913 | |
| 4914 | *slot = vp1; |
| 4915 | vp1->next = last_inserted_phi; |
| 4916 | last_inserted_phi = vp1; |
| 4917 | return vp1; |
| 4918 | } |
| 4919 | |
| 4920 | |
| 4921 | /* Return true if BB1 is dominated by BB2 taking into account edges |
| 4922 | that are not executable. When ALLOW_BACK is false consider not |
| 4923 | executable backedges as executable. */ |
| 4924 | |
| 4925 | static bool |
| 4926 | dominated_by_p_w_unex (basic_block bb1, basic_block bb2, bool allow_back) |
| 4927 | { |
| 4928 | edge_iterator ei; |
| 4929 | edge e; |
| 4930 | |
| 4931 | if (dominated_by_p (CDI_DOMINATORS, bb1, bb2)) |
| 4932 | return true; |
| 4933 | |
| 4934 | /* Before iterating we'd like to know if there exists a |
| 4935 | (executable) path from bb2 to bb1 at all, if not we can |
| 4936 | directly return false. For now simply iterate once. */ |
| 4937 | |
| 4938 | /* Iterate to the single executable bb1 predecessor. */ |
| 4939 | if (EDGE_COUNT (bb1->preds)vec_safe_length (bb1->preds) > 1) |
| 4940 | { |
| 4941 | edge prede = NULLnullptr; |
| 4942 | FOR_EACH_EDGE (e, ei, bb1->preds)for ((ei) = ei_start_1 (&((bb1->preds))); ei_cond ((ei ), &(e)); ei_next (&(ei))) |
| 4943 | if ((e->flags & EDGE_EXECUTABLE) |
| 4944 | || (!allow_back && (e->flags & EDGE_DFS_BACK))) |
| 4945 | { |
| 4946 | if (prede) |
| 4947 | { |
| 4948 | prede = NULLnullptr; |
| 4949 | break; |
| 4950 | } |
| 4951 | prede = e; |
| 4952 | } |
| 4953 | if (prede) |
| 4954 | { |
| 4955 | bb1 = prede->src; |
| 4956 | |
| 4957 | /* Re-do the dominance check with changed bb1. */ |
| 4958 | if (dominated_by_p (CDI_DOMINATORS, bb1, bb2)) |
| 4959 | return true; |
| 4960 | } |
| 4961 | } |
| 4962 | |
| 4963 | /* Iterate to the single executable bb2 successor. */ |
| 4964 | if (EDGE_COUNT (bb2->succs)vec_safe_length (bb2->succs) > 1) |
| 4965 | { |
| 4966 | edge succe = NULLnullptr; |
| 4967 | FOR_EACH_EDGE (e, ei, bb2->succs)for ((ei) = ei_start_1 (&((bb2->succs))); ei_cond ((ei ), &(e)); ei_next (&(ei))) |
| 4968 | if ((e->flags & EDGE_EXECUTABLE) |
| 4969 | || (!allow_back && (e->flags & EDGE_DFS_BACK))) |
| 4970 | { |
| 4971 | if (succe) |
| 4972 | { |
| 4973 | succe = NULLnullptr; |
| 4974 | break; |
| 4975 | } |
| 4976 | succe = e; |
| 4977 | } |
| 4978 | if (succe) |
| 4979 | { |
| 4980 | /* Verify the reached block is only reached through succe. |
| 4981 | If there is only one edge we can spare us the dominator |
| 4982 | check and iterate directly. */ |
| 4983 | if (EDGE_COUNT (succe->dest->preds)vec_safe_length (succe->dest->preds) > 1) |
| 4984 | { |
| 4985 | FOR_EACH_EDGE (e, ei, succe->dest->preds)for ((ei) = ei_start_1 (&((succe->dest->preds))); ei_cond ((ei), &(e)); ei_next (&(ei))) |
| 4986 | if (e != succe |
| 4987 | && ((e->flags & EDGE_EXECUTABLE) |
| 4988 | || (!allow_back && (e->flags & EDGE_DFS_BACK)))) |
| 4989 | { |
| 4990 | succe = NULLnullptr; |
| 4991 | break; |
| 4992 | } |
| 4993 | } |
| 4994 | if (succe) |
| 4995 | { |
| 4996 | bb2 = succe->dest; |
| 4997 | |
| 4998 | /* Re-do the dominance check with changed bb2. */ |
| 4999 | if (dominated_by_p (CDI_DOMINATORS, bb1, bb2)) |
| 5000 | return true; |
| 5001 | } |
| 5002 | } |
| 5003 | } |
| 5004 | |
| 5005 | /* We could now iterate updating bb1 / bb2. */ |
| 5006 | return false; |
| 5007 | } |
| 5008 | |
| 5009 | /* Set the value number of FROM to TO, return true if it has changed |
| 5010 | as a result. */ |
| 5011 | |
| 5012 | static inline bool |
| 5013 | set_ssa_val_to (tree from, tree to) |
| 5014 | { |
| 5015 | vn_ssa_aux_t from_info = VN_INFO (from); |
| 5016 | tree currval = from_info->valnum; // SSA_VAL (from) |
| 5017 | poly_int64 toff, coff; |
| 5018 | bool curr_undefined = false; |
| 5019 | bool curr_invariant = false; |
| 5020 | |
| 5021 | /* The only thing we allow as value numbers are ssa_names |
| 5022 | and invariants. So assert that here. We don't allow VN_TOP |
| 5023 | as visiting a stmt should produce a value-number other than |
| 5024 | that. |
| 5025 | ??? Still VN_TOP can happen for unreachable code, so force |
| 5026 | it to varying in that case. Not all code is prepared to |
| 5027 | get VN_TOP on valueization. */ |
| 5028 | if (to == VN_TOP) |
| 5029 | { |
| 5030 | /* ??? When iterating and visiting PHI <undef, backedge-value> |
| 5031 | for the first time we rightfully get VN_TOP and we need to |
| 5032 | preserve that to optimize for example gcc.dg/tree-ssa/ssa-sccvn-2.c. |
| 5033 | With SCCVN we were simply lucky we iterated the other PHI |
| 5034 | cycles first and thus visited the backedge-value DEF. */ |
| 5035 | if (currval == VN_TOP) |
| 5036 | goto set_and_exit; |
| 5037 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 5038 | fprintf (dump_file, "Forcing value number to varying on " |
| 5039 | "receiving VN_TOP\n"); |
| 5040 | to = from; |
| 5041 | } |
| 5042 | |
| 5043 | gcc_checking_assert (to != NULL_TREE((void)(!(to != (tree) nullptr && ((((enum tree_code) (to)->base.code) == SSA_NAME && (to == from || SSA_VAL (to) == to)) || is_gimple_min_invariant (to))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5046, __FUNCTION__), 0 : 0)) |
| 5044 | && ((TREE_CODE (to) == SSA_NAME((void)(!(to != (tree) nullptr && ((((enum tree_code) (to)->base.code) == SSA_NAME && (to == from || SSA_VAL (to) == to)) || is_gimple_min_invariant (to))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5046, __FUNCTION__), 0 : 0)) |
| 5045 | && (to == from || SSA_VAL (to) == to))((void)(!(to != (tree) nullptr && ((((enum tree_code) (to)->base.code) == SSA_NAME && (to == from || SSA_VAL (to) == to)) || is_gimple_min_invariant (to))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5046, __FUNCTION__), 0 : 0)) |
| 5046 | || is_gimple_min_invariant (to)))((void)(!(to != (tree) nullptr && ((((enum tree_code) (to)->base.code) == SSA_NAME && (to == from || SSA_VAL (to) == to)) || is_gimple_min_invariant (to))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5046, __FUNCTION__), 0 : 0)); |
| 5047 | |
| 5048 | if (from != to) |
| 5049 | { |
| 5050 | if (currval == from) |
| 5051 | { |
| 5052 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 5053 | { |
| 5054 | fprintf (dump_file, "Not changing value number of "); |
| 5055 | print_generic_expr (dump_file, from); |
| 5056 | fprintf (dump_file, " from VARYING to "); |
| 5057 | print_generic_expr (dump_file, to); |
| 5058 | fprintf (dump_file, "\n"); |
| 5059 | } |
| 5060 | return false; |
| 5061 | } |
| 5062 | curr_invariant = is_gimple_min_invariant (currval); |
| 5063 | curr_undefined = (TREE_CODE (currval)((enum tree_code) (currval)->base.code) == SSA_NAME |
| 5064 | && !virtual_operand_p (currval) |
| 5065 | && ssa_undefined_value_p (currval, false)); |
| 5066 | if (currval != VN_TOP |
| 5067 | && !curr_invariant |
| 5068 | && !curr_undefined |
| 5069 | && is_gimple_min_invariant (to)) |
| 5070 | { |
| 5071 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 5072 | { |
| 5073 | fprintf (dump_file, "Forcing VARYING instead of changing " |
| 5074 | "value number of "); |
| 5075 | print_generic_expr (dump_file, from); |
| 5076 | fprintf (dump_file, " from "); |
| 5077 | print_generic_expr (dump_file, currval); |
| 5078 | fprintf (dump_file, " (non-constant) to "); |
| 5079 | print_generic_expr (dump_file, to); |
| 5080 | fprintf (dump_file, " (constant)\n"); |
| 5081 | } |
| 5082 | to = from; |
| 5083 | } |
| 5084 | else if (currval != VN_TOP |
| 5085 | && !curr_undefined |
| 5086 | && TREE_CODE (to)((enum tree_code) (to)->base.code) == SSA_NAME |
| 5087 | && !virtual_operand_p (to) |
| 5088 | && ssa_undefined_value_p (to, false)) |
| 5089 | { |
| 5090 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 5091 | { |
| 5092 | fprintf (dump_file, "Forcing VARYING instead of changing " |
| 5093 | "value number of "); |
| 5094 | print_generic_expr (dump_file, from); |
| 5095 | fprintf (dump_file, " from "); |
| 5096 | print_generic_expr (dump_file, currval); |
| 5097 | fprintf (dump_file, " (non-undefined) to "); |
| 5098 | print_generic_expr (dump_file, to); |
| 5099 | fprintf (dump_file, " (undefined)\n"); |
| 5100 | } |
| 5101 | to = from; |
| 5102 | } |
| 5103 | else if (TREE_CODE (to)((enum tree_code) (to)->base.code) == SSA_NAME |
| 5104 | && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (to)(tree_check ((to), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5104, __FUNCTION__, (SSA_NAME)))->base.asm_written_flag) |
| 5105 | to = from; |
| 5106 | } |
| 5107 | |
| 5108 | set_and_exit: |
| 5109 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 5110 | { |
| 5111 | fprintf (dump_file, "Setting value number of "); |
| 5112 | print_generic_expr (dump_file, from); |
| 5113 | fprintf (dump_file, " to "); |
| 5114 | print_generic_expr (dump_file, to); |
| 5115 | } |
| 5116 | |
| 5117 | if (currval != to |
| 5118 | && !operand_equal_p (currval, to, 0) |
| 5119 | /* Different undefined SSA names are not actually different. See |
| 5120 | PR82320 for a testcase were we'd otherwise not terminate iteration. */ |
| 5121 | && !(curr_undefined |
| 5122 | && TREE_CODE (to)((enum tree_code) (to)->base.code) == SSA_NAME |
| 5123 | && !virtual_operand_p (to) |
| 5124 | && ssa_undefined_value_p (to, false)) |
| 5125 | /* ??? For addresses involving volatile objects or types operand_equal_p |
| 5126 | does not reliably detect ADDR_EXPRs as equal. We know we are only |
| 5127 | getting invariant gimple addresses here, so can use |
| 5128 | get_addr_base_and_unit_offset to do this comparison. */ |
| 5129 | && !(TREE_CODE (currval)((enum tree_code) (currval)->base.code) == ADDR_EXPR |
| 5130 | && TREE_CODE (to)((enum tree_code) (to)->base.code) == ADDR_EXPR |
| 5131 | && (get_addr_base_and_unit_offset (TREE_OPERAND (currval, 0)(*((const_cast<tree*> (tree_operand_check ((currval), ( 0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5131, __FUNCTION__))))), &coff) |
| 5132 | == get_addr_base_and_unit_offset (TREE_OPERAND (to, 0)(*((const_cast<tree*> (tree_operand_check ((to), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5132, __FUNCTION__))))), &toff)) |
| 5133 | && known_eq (coff, toff)(!maybe_ne (coff, toff)))) |
| 5134 | { |
| 5135 | if (to != from |
| 5136 | && currval != VN_TOP |
| 5137 | && !curr_undefined |
| 5138 | /* We do not want to allow lattice transitions from one value |
| 5139 | to another since that may lead to not terminating iteration |
| 5140 | (see PR95049). Since there's no convenient way to check |
| 5141 | for the allowed transition of VAL -> PHI (loop entry value, |
| 5142 | same on two PHIs, to same PHI result) we restrict the check |
| 5143 | to invariants. */ |
| 5144 | && curr_invariant |
| 5145 | && is_gimple_min_invariant (to)) |
| 5146 | { |
| 5147 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 5148 | fprintf (dump_file, " forced VARYING"); |
| 5149 | to = from; |
| 5150 | } |
| 5151 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 5152 | fprintf (dump_file, " (changed)\n"); |
| 5153 | from_info->valnum = to; |
| 5154 | return true; |
| 5155 | } |
| 5156 | if (dump_file && (dump_flags & TDF_DETAILS)) |
| 5157 | fprintf (dump_file, "\n"); |
| 5158 | return false; |
| 5159 | } |
| 5160 | |
| 5161 | /* Set all definitions in STMT to value number to themselves. |
| 5162 | Return true if a value number changed. */ |
| 5163 | |
| 5164 | static bool |
| 5165 | defs_to_varying (gimple *stmt) |
| 5166 | { |
| 5167 | bool changed = false; |
| 5168 | ssa_op_iter iter; |
| 5169 | def_operand_p defp; |
| 5170 | |
| 5171 | FOR_EACH_SSA_DEF_OPERAND (defp, stmt, iter, SSA_OP_ALL_DEFS)for (defp = op_iter_init_def (&(iter), stmt, ((0x08) | 0x02 )); !op_iter_done (&(iter)); defp = op_iter_next_def (& (iter))) |
| 5172 | { |
| 5173 | tree def = DEF_FROM_PTR (defp)get_def_from_ptr (defp); |
| 5174 | changed |= set_ssa_val_to (def, def); |
| 5175 | } |
| 5176 | return changed; |
| 5177 | } |
| 5178 | |
| 5179 | /* Visit a copy between LHS and RHS, return true if the value number |
| 5180 | changed. */ |
| 5181 | |
| 5182 | static bool |
| 5183 | visit_copy (tree lhs, tree rhs) |
| 5184 | { |
| 5185 | /* Valueize. */ |
| 5186 | rhs = SSA_VAL (rhs); |
| 5187 | |
| 5188 | return set_ssa_val_to (lhs, rhs); |
| 5189 | } |
| 5190 | |
| 5191 | /* Lookup a value for OP in type WIDE_TYPE where the value in type of OP |
| 5192 | is the same. */ |
| 5193 | |
| 5194 | static tree |
| 5195 | valueized_wider_op (tree wide_type, tree op, bool allow_truncate) |
| 5196 | { |
| 5197 | if (TREE_CODE (op)((enum tree_code) (op)->base.code) == SSA_NAME) |
| 5198 | op = vn_valueize (op); |
| 5199 | |
| 5200 | /* Either we have the op widened available. */ |
| 5201 | tree ops[3] = {}; |
| 5202 | ops[0] = op; |
| 5203 | tree tem = vn_nary_op_lookup_pieces (1, NOP_EXPR, |
| 5204 | wide_type, ops, NULLnullptr); |
| 5205 | if (tem) |
| 5206 | return tem; |
| 5207 | |
| 5208 | /* Or the op is truncated from some existing value. */ |
| 5209 | if (allow_truncate && TREE_CODE (op)((enum tree_code) (op)->base.code) == SSA_NAME) |
| 5210 | { |
| 5211 | gimple *def = SSA_NAME_DEF_STMT (op)(tree_check ((op), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5211, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt; |
| 5212 | if (is_gimple_assign (def) |
| 5213 | && CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (def))((gimple_assign_rhs_code (def)) == NOP_EXPR || (gimple_assign_rhs_code (def)) == CONVERT_EXPR)) |
| 5214 | { |
| 5215 | tem = gimple_assign_rhs1 (def); |
| 5216 | if (useless_type_conversion_p (wide_type, TREE_TYPE (tem)((contains_struct_check ((tem), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5216, __FUNCTION__))->typed.type))) |
| 5217 | { |
| 5218 | if (TREE_CODE (tem)((enum tree_code) (tem)->base.code) == SSA_NAME) |
| 5219 | tem = vn_valueize (tem); |
| 5220 | return tem; |
| 5221 | } |
| 5222 | } |
| 5223 | } |
| 5224 | |
| 5225 | /* For constants simply extend it. */ |
| 5226 | if (TREE_CODE (op)((enum tree_code) (op)->base.code) == INTEGER_CST) |
| 5227 | return wide_int_to_tree (wide_type, wi::to_widest (op)); |
| 5228 | |
| 5229 | return NULL_TREE(tree) nullptr; |
| 5230 | } |
| 5231 | |
| 5232 | /* Visit a nary operator RHS, value number it, and return true if the |
| 5233 | value number of LHS has changed as a result. */ |
| 5234 | |
| 5235 | static bool |
| 5236 | visit_nary_op (tree lhs, gassign *stmt) |
| 5237 | { |
| 5238 | vn_nary_op_t vnresult; |
| 5239 | tree result = vn_nary_op_lookup_stmt (stmt, &vnresult); |
| 5240 | if (! result && vnresult) |
| 5241 | result = vn_nary_op_get_predicated_value (vnresult, gimple_bb (stmt)); |
| 5242 | if (result) |
| 5243 | return set_ssa_val_to (lhs, result); |
| 5244 | |
| 5245 | /* Do some special pattern matching for redundancies of operations |
| 5246 | in different types. */ |
| 5247 | enum tree_code code = gimple_assign_rhs_code (stmt); |
| 5248 | tree type = TREE_TYPE (lhs)((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5248, __FUNCTION__))->typed.type); |
| 5249 | tree rhs1 = gimple_assign_rhs1 (stmt); |
| 5250 | switch (code) |
| 5251 | { |
| 5252 | CASE_CONVERTcase NOP_EXPR: case CONVERT_EXPR: |
| 5253 | /* Match arithmetic done in a different type where we can easily |
| 5254 | substitute the result from some earlier sign-changed or widened |
| 5255 | operation. */ |
| 5256 | if (INTEGRAL_TYPE_P (type)(((enum tree_code) (type)->base.code) == ENUMERAL_TYPE || ( (enum tree_code) (type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (type)->base.code) == INTEGER_TYPE) |
| 5257 | && TREE_CODE (rhs1)((enum tree_code) (rhs1)->base.code) == SSA_NAME |
| 5258 | /* We only handle sign-changes, zero-extension -> & mask or |
| 5259 | sign-extension if we know the inner operation doesn't |
| 5260 | overflow. */ |
| 5261 | && (((TYPE_UNSIGNED (TREE_TYPE (rhs1))((tree_class_check ((((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5261, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5261, __FUNCTION__))->base.u.bits.unsigned_flag) |
| 5262 | || (INTEGRAL_TYPE_P (TREE_TYPE (rhs1))(((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5262, __FUNCTION__))->typed.type))->base.code) == ENUMERAL_TYPE || ((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5262, __FUNCTION__))->typed.type))->base.code) == BOOLEAN_TYPE || ((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5262, __FUNCTION__))->typed.type))->base.code) == INTEGER_TYPE ) |
| 5263 | && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (rhs1))((((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5263, __FUNCTION__))->typed.type))->base.code) == POINTER_TYPE || ((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5263, __FUNCTION__))->typed.type))->base.code) == REFERENCE_TYPE ) ? !global_options.x_flag_wrapv_pointer : (!(any_integral_type_check ((((contains_struct_check ((rhs1), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5263, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5263, __FUNCTION__))->base.u.bits.unsigned_flag && !global_options.x_flag_wrapv && !global_options.x_flag_trapv )))) |
| 5264 | && TYPE_PRECISION (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5264, __FUNCTION__))->type_common.precision) > TYPE_PRECISION (TREE_TYPE (rhs1))((tree_class_check ((((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5264, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5264, __FUNCTION__))->type_common.precision)) |
| 5265 | || TYPE_PRECISION (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5265, __FUNCTION__))->type_common.precision) == TYPE_PRECISION (TREE_TYPE (rhs1))((tree_class_check ((((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5265, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5265, __FUNCTION__))->type_common.precision))) |
| 5266 | { |
| 5267 | gassign *def = dyn_cast <gassign *> (SSA_NAME_DEF_STMT (rhs1)(tree_check ((rhs1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5267, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt); |
| 5268 | if (def |
| 5269 | && (gimple_assign_rhs_code (def) == PLUS_EXPR |
| 5270 | || gimple_assign_rhs_code (def) == MINUS_EXPR |
| 5271 | || gimple_assign_rhs_code (def) == MULT_EXPR)) |
| 5272 | { |
| 5273 | tree ops[3] = {}; |
| 5274 | /* When requiring a sign-extension we cannot model a |
| 5275 | previous truncation with a single op so don't bother. */ |
| 5276 | bool allow_truncate = TYPE_UNSIGNED (TREE_TYPE (rhs1))((tree_class_check ((((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5276, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5276, __FUNCTION__))->base.u.bits.unsigned_flag); |
| 5277 | /* Either we have the op widened available. */ |
| 5278 | ops[0] = valueized_wider_op (type, gimple_assign_rhs1 (def), |
| 5279 | allow_truncate); |
| 5280 | if (ops[0]) |
| 5281 | ops[1] = valueized_wider_op (type, gimple_assign_rhs2 (def), |
| 5282 | allow_truncate); |
| 5283 | if (ops[0] && ops[1]) |
| 5284 | { |
| 5285 | ops[0] = vn_nary_op_lookup_pieces |
| 5286 | (2, gimple_assign_rhs_code (def), type, ops, NULLnullptr); |
| 5287 | /* We have wider operation available. */ |
| 5288 | if (ops[0] |
| 5289 | /* If the leader is a wrapping operation we can |
| 5290 | insert it for code hoisting w/o introducing |
| 5291 | undefined overflow. If it is not it has to |
| 5292 | be available. See PR86554. */ |
| 5293 | && (TYPE_OVERFLOW_WRAPS (TREE_TYPE (ops[0]))((((enum tree_code) (((contains_struct_check ((ops[0]), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5293, __FUNCTION__))->typed.type))->base.code) == POINTER_TYPE || ((enum tree_code) (((contains_struct_check ((ops[0]), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5293, __FUNCTION__))->typed.type))->base.code) == REFERENCE_TYPE ) ? global_options.x_flag_wrapv_pointer : ((any_integral_type_check ((((contains_struct_check ((ops[0]), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5293, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5293, __FUNCTION__))->base.u.bits.unsigned_flag || global_options .x_flag_wrapv)) |
| 5294 | || (rpo_avail && vn_context_bb |
| 5295 | && rpo_avail->eliminate_avail (vn_context_bb, |
| 5296 | ops[0])))) |
| 5297 | { |
| 5298 | unsigned lhs_prec = TYPE_PRECISION (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5298, __FUNCTION__))->type_common.precision); |
| 5299 | unsigned rhs_prec = TYPE_PRECISION (TREE_TYPE (rhs1))((tree_class_check ((((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5299, __FUNCTION__))->typed.type)), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5299, __FUNCTION__))->type_common.precision); |
| 5300 | if (lhs_prec == rhs_prec |
| 5301 | || (INTEGRAL_TYPE_P (TREE_TYPE (rhs1))(((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5301, __FUNCTION__))->typed.type))->base.code) == ENUMERAL_TYPE || ((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5301, __FUNCTION__))->typed.type))->base.code) == BOOLEAN_TYPE || ((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5301, __FUNCTION__))->typed.type))->base.code) == INTEGER_TYPE ) |
| 5302 | && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (rhs1))((((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5302, __FUNCTION__))->typed.type))->base.code) == POINTER_TYPE || ((enum tree_code) (((contains_struct_check ((rhs1), (TS_TYPED ), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5302, __FUNCTION__))->typed.type))->base.code) == REFERENCE_TYPE ) ? !global_options.x_flag_wrapv_pointer : (!(any_integral_type_check ((((contains_struct_check ((rhs1), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5302, __FUNCTION__))->typed.type)), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5302, __FUNCTION__))->base.u.bits.unsigned_flag && !global_options.x_flag_wrapv && !global_options.x_flag_trapv )))) |
| 5303 | { |
| 5304 | gimple_match_op match_op (gimple_match_cond::UNCOND, |
| 5305 | NOP_EXPR, type, ops[0]); |
| 5306 | result = vn_nary_build_or_lookup (&match_op); |
| 5307 | if (result) |
| 5308 | { |
| 5309 | bool changed = set_ssa_val_to (lhs, result); |
| 5310 | vn_nary_op_insert_stmt (stmt, result); |
| 5311 | return changed; |
| 5312 | } |
| 5313 | } |
| 5314 | else |
| 5315 | { |
| 5316 | tree mask = wide_int_to_tree |
| 5317 | (type, wi::mask (rhs_prec, false, lhs_prec)); |
| 5318 | gimple_match_op match_op (gimple_match_cond::UNCOND, |
| 5319 | BIT_AND_EXPR, |
| 5320 | TREE_TYPE (lhs)((contains_struct_check ((lhs), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5320, __FUNCTION__))->typed.type), |
| 5321 | ops[0], mask); |
| 5322 | result = vn_nary_build_or_lookup (&match_op); |
| 5323 | if (result) |
| 5324 | { |
| 5325 | bool changed = set_ssa_val_to (lhs, result); |
| 5326 | vn_nary_op_insert_stmt (stmt, result); |
| 5327 | return changed; |
| 5328 | } |
| 5329 | } |
| 5330 | } |
| 5331 | } |
| 5332 | } |
| 5333 | } |
| 5334 | break; |
| 5335 | case BIT_AND_EXPR: |
| 5336 | if (INTEGRAL_TYPE_P (type)(((enum tree_code) (type)->base.code) == ENUMERAL_TYPE || ( (enum tree_code) (type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (type)->base.code) == INTEGER_TYPE) |
| 5337 | && TREE_CODE (rhs1)((enum tree_code) (rhs1)->base.code) == SSA_NAME |
| 5338 | && TREE_CODE (gimple_assign_rhs2 (stmt))((enum tree_code) (gimple_assign_rhs2 (stmt))->base.code) == INTEGER_CST |
| 5339 | && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (rhs1)(tree_check ((rhs1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5339, __FUNCTION__, (SSA_NAME)))->base.asm_written_flag |
| 5340 | && default_vn_walk_kind != VN_NOWALK |
| 5341 | && CHAR_BIT8 == 8 |
| 5342 | && BITS_PER_UNIT(8) == 8 |
| 5343 | && BYTES_BIG_ENDIAN0 == WORDS_BIG_ENDIAN0 |
| 5344 | && !integer_all_onesp (gimple_assign_rhs2 (stmt)) |
| 5345 | && !integer_zerop (gimple_assign_rhs2 (stmt))) |
| 5346 | { |
| 5347 | gassign *ass = dyn_cast <gassign *> (SSA_NAME_DEF_STMT (rhs1)(tree_check ((rhs1), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5347, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt); |
| 5348 | if (ass |
| 5349 | && !gimple_has_volatile_ops (ass) |
| 5350 | && vn_get_stmt_kind (ass) == VN_REFERENCE) |
| 5351 | { |
| 5352 | tree last_vuse = gimple_vuse (ass); |
| 5353 | tree op = gimple_assign_rhs1 (ass); |
| 5354 | tree result = vn_reference_lookup (op, gimple_vuse (ass), |
| 5355 | default_vn_walk_kind, |
| 5356 | NULLnullptr, true, &last_vuse, |
| 5357 | gimple_assign_rhs2 (stmt)); |
| 5358 | if (result |
| 5359 | && useless_type_conversion_p (TREE_TYPE (result)((contains_struct_check ((result), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5359, __FUNCTION__))->typed.type), |
| 5360 | TREE_TYPE (op)((contains_struct_check ((op), (TS_TYPED), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5360, __FUNCTION__))->typed.type))) |
| 5361 | return set_ssa_val_to (lhs, result); |
| 5362 | } |
| 5363 | } |
| 5364 | break; |
| 5365 | case TRUNC_DIV_EXPR: |
| 5366 | if (TYPE_UNSIGNED (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5366, __FUNCTION__))->base.u.bits.unsigned_flag)) |
| 5367 | break; |
| 5368 | /* Fallthru. */ |
| 5369 | case RDIV_EXPR: |
| 5370 | case MULT_EXPR: |
| 5371 | /* Match up ([-]a){/,*}([-])b with v=a{/,*}b, replacing it with -v. */ |
| 5372 | if (! HONOR_SIGN_DEPENDENT_ROUNDING (type)) |
| 5373 | { |
| 5374 | tree rhs[2]; |
| 5375 | rhs[0] = rhs1; |
| 5376 | rhs[1] = gimple_assign_rhs2 (stmt); |
| 5377 | for (unsigned i = 0; i <= 1; ++i) |
| 5378 | { |
| 5379 | unsigned j = i == 0 ? 1 : 0; |
| 5380 | tree ops[2]; |
| 5381 | gimple_match_op match_op (gimple_match_cond::UNCOND, |
| 5382 | NEGATE_EXPR, type, rhs[i]); |
| 5383 | ops[i] = vn_nary_build_or_lookup_1 (&match_op, false, true); |
| 5384 | ops[j] = rhs[j]; |
| 5385 | if (ops[i] |
| 5386 | && (ops[0] = vn_nary_op_lookup_pieces (2, code, |
| 5387 | type, ops, NULLnullptr))) |
| 5388 | { |
| 5389 | gimple_match_op match_op (gimple_match_cond::UNCOND, |
| 5390 | NEGATE_EXPR, type, ops[0]); |
| 5391 | result = vn_nary_build_or_lookup_1 (&match_op, true, false); |
| 5392 | if (result) |
| 5393 | { |
| 5394 | bool changed = set_ssa_val_to (lhs, result); |
| 5395 | vn_nary_op_insert_stmt (stmt, result); |
| 5396 | return changed; |
| 5397 | } |
| 5398 | } |
| 5399 | } |
| 5400 | } |
| 5401 | break; |
| 5402 | case LSHIFT_EXPR: |
| 5403 | /* For X << C, use the value number of X * (1 << C). */ |
| 5404 | if (INTEGRAL_TYPE_P (type)(((enum tree_code) (type)->base.code) == ENUMERAL_TYPE || ( (enum tree_code) (type)->base.code) == BOOLEAN_TYPE || ((enum tree_code) (type)->base.code) == INTEGER_TYPE) |
| 5405 | && TYPE_OVERFLOW_WRAPS (type)((((enum tree_code) (type)->base.code) == POINTER_TYPE || ( (enum tree_code) (type)->base.code) == REFERENCE_TYPE) ? global_options .x_flag_wrapv_pointer : ((any_integral_type_check ((type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5405, __FUNCTION__))->base.u.bits.unsigned_flag || global_options .x_flag_wrapv)) |
| 5406 | && !TYPE_SATURATING (type)((tree_not_check4 ((type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5406, __FUNCTION__, (RECORD_TYPE), (UNION_TYPE), (QUAL_UNION_TYPE ), (ARRAY_TYPE)))->base.u.bits.saturating_flag)) |
| 5407 | { |
| 5408 | tree rhs2 = gimple_assign_rhs2 (stmt); |
| 5409 | if (TREE_CODE (rhs2)((enum tree_code) (rhs2)->base.code) == INTEGER_CST |
| 5410 | && tree_fits_uhwi_p (rhs2) |
| 5411 | && tree_to_uhwi (rhs2) < TYPE_PRECISION (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5411, __FUNCTION__))->type_common.precision)) |
| 5412 | { |
| 5413 | wide_int w = wi::set_bit_in_zero (tree_to_uhwi (rhs2), |
| 5414 | TYPE_PRECISION (type)((tree_class_check ((type), (tcc_type), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5414, __FUNCTION__))->type_common.precision)); |
| 5415 | gimple_match_op match_op (gimple_match_cond::UNCOND, |
| 5416 | MULT_EXPR, type, rhs1, |
| 5417 | wide_int_to_tree (type, w)); |
| 5418 | result = vn_nary_build_or_lookup (&match_op); |
| 5419 | if (result) |
| 5420 | { |
| 5421 | bool changed = set_ssa_val_to (lhs, result); |
| 5422 | if (TREE_CODE (result)((enum tree_code) (result)->base.code) == SSA_NAME) |
| 5423 | vn_nary_op_insert_stmt (stmt, result); |
| 5424 | return changed; |
| 5425 | } |
| 5426 | } |
| 5427 | } |
| 5428 | break; |
| 5429 | default: |
| 5430 | break; |
| 5431 | } |
| 5432 | |
| 5433 | bool changed = set_ssa_val_to (lhs, lhs); |
| 5434 | vn_nary_op_insert_stmt (stmt, lhs); |
| 5435 | return changed; |
| 5436 | } |
| 5437 | |
| 5438 | /* Visit a call STMT storing into LHS. Return true if the value number |
| 5439 | of the LHS has changed as a result. */ |
| 5440 | |
| 5441 | static bool |
| 5442 | visit_reference_op_call (tree lhs, gcall *stmt) |
| 5443 | { |
| 5444 | bool changed = false; |
| 5445 | struct vn_reference_s vr1; |
| 5446 | vn_reference_t vnresult = NULLnullptr; |
| 5447 | tree vdef = gimple_vdef (stmt); |
| 5448 | modref_summary *summary; |
| 5449 | |
| 5450 | /* Non-ssa lhs is handled in copy_reference_ops_from_call. */ |
| 5451 | if (lhs && TREE_CODE (lhs)((enum tree_code) (lhs)->base.code) != SSA_NAME) |
| 5452 | lhs = NULL_TREE(tree) nullptr; |
| 5453 | |
| 5454 | vn_reference_lookup_call (stmt, &vnresult, &vr1); |
| 5455 | |
| 5456 | /* If the lookup did not succeed for pure functions try to use |
| 5457 | modref info to find a candidate to CSE to. */ |
| 5458 | const unsigned accesses_limit = 8; |
| 5459 | if (!vnresult |
| 5460 | && !vdef |
| 5461 | && lhs |
| 5462 | && gimple_vuse (stmt) |
| 5463 | && (((summary = get_modref_function_summary (stmt, NULLnullptr)) |
| 5464 | && !summary->global_memory_read |
| 5465 | && summary->load_accesses < accesses_limit) |
| 5466 | || gimple_call_flags (stmt) & ECF_CONST(1 << 0))) |
| 5467 | { |
| 5468 | /* First search if we can do someting useful and build a |
| 5469 | vector of all loads we have to check. */ |
| 5470 | bool unknown_memory_access = false; |
| 5471 | auto_vec<ao_ref, accesses_limit> accesses; |
| 5472 | unsigned load_accesses = summary ? summary->load_accesses : 0; |
| 5473 | if (!unknown_memory_access) |
| 5474 | /* Add loads done as part of setting up the call arguments. |
| 5475 | That's also necessary for CONST functions which will |
| 5476 | not have a modref summary. */ |
| 5477 | for (unsigned i = 0; i < gimple_call_num_args (stmt); ++i) |
| 5478 | { |
| 5479 | tree arg = gimple_call_arg (stmt, i); |
| 5480 | if (TREE_CODE (arg)((enum tree_code) (arg)->base.code) != SSA_NAME |
| 5481 | && !is_gimple_min_invariant (arg)) |
| 5482 | { |
| 5483 | if (accesses.length () >= accesses_limit - load_accesses) |
| 5484 | { |
| 5485 | unknown_memory_access = true; |
| 5486 | break; |
| 5487 | } |
| 5488 | accesses.quick_grow (accesses.length () + 1); |
| 5489 | ao_ref_init (&accesses.last (), arg); |
| 5490 | } |
| 5491 | } |
| 5492 | if (summary && !unknown_memory_access) |
| 5493 | { |
| 5494 | /* Add loads as analyzed by IPA modref. */ |
| 5495 | for (auto base_node : summary->loads->bases) |
| 5496 | if (unknown_memory_access) |
| 5497 | break; |
| 5498 | else for (auto ref_node : base_node->refs) |
| 5499 | if (unknown_memory_access) |
| 5500 | break; |
| 5501 | else for (auto access_node : ref_node->accesses) |
| 5502 | { |
| 5503 | accesses.quick_grow (accesses.length () + 1); |
| 5504 | ao_ref *r = &accesses.last (); |
| 5505 | if (!access_node.get_ao_ref (stmt, r)) |
| 5506 | { |
| 5507 | /* Initialize a ref based on the argument and |
| 5508 | unknown offset if possible. */ |
| 5509 | tree arg = access_node.get_call_arg (stmt); |
| 5510 | if (arg && TREE_CODE (arg)((enum tree_code) (arg)->base.code) == SSA_NAME) |
| 5511 | arg = SSA_VAL (arg); |
| 5512 | if (arg |
| 5513 | && TREE_CODE (arg)((enum tree_code) (arg)->base.code) == ADDR_EXPR |
| 5514 | && (arg = get_base_address (arg)) |
| 5515 | && DECL_P (arg)(tree_code_type_tmpl <0>::tree_code_type[(int) (((enum tree_code ) (arg)->base.code))] == tcc_declaration)) |
| 5516 | { |
| 5517 | ao_ref_init (r, arg); |
| 5518 | r->ref = NULL_TREE(tree) nullptr; |
| 5519 | r->base = arg; |
| 5520 | } |
| 5521 | else |
| 5522 | { |
| 5523 | unknown_memory_access = true; |
| 5524 | break; |
| 5525 | } |
| 5526 | } |
| 5527 | r->base_alias_set = base_node->base; |
| 5528 | r->ref_alias_set = ref_node->ref; |
| 5529 | } |
| 5530 | } |
| 5531 | |
| 5532 | /* Walk the VUSE->VDEF chain optimistically trying to find an entry |
| 5533 | for the call in the hashtable. */ |
| 5534 | unsigned limit = (unknown_memory_access |
| 5535 | ? 0 |
| 5536 | : (param_sccvn_max_alias_queries_per_accessglobal_options.x_param_sccvn_max_alias_queries_per_access |
| 5537 | / (accesses.length () + 1))); |
| 5538 | tree saved_vuse = vr1.vuse; |
| 5539 | hashval_t saved_hashcode = vr1.hashcode; |
| 5540 | while (limit > 0 && !vnresult && !SSA_NAME_IS_DEFAULT_DEF (vr1.vuse)(tree_check ((vr1.vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5540, __FUNCTION__, (SSA_NAME)))->base.default_def_flag) |
| 5541 | { |
| 5542 | vr1.hashcode = vr1.hashcode - SSA_NAME_VERSION (vr1.vuse)(tree_check ((vr1.vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5542, __FUNCTION__, (SSA_NAME)))->base.u.version; |
| 5543 | gimple *def = SSA_NAME_DEF_STMT (vr1.vuse)(tree_check ((vr1.vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5543, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt; |
| 5544 | /* ??? We could use fancy stuff like in walk_non_aliased_vuses, but |
| 5545 | do not bother for now. */ |
| 5546 | if (is_a <gphi *> (def)) |
| 5547 | break; |
| 5548 | vr1.vuse = vuse_ssa_val (gimple_vuse (def)); |
| 5549 | vr1.hashcode = vr1.hashcode + SSA_NAME_VERSION (vr1.vuse)(tree_check ((vr1.vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5549, __FUNCTION__, (SSA_NAME)))->base.u.version; |
| 5550 | vn_reference_lookup_1 (&vr1, &vnresult); |
| 5551 | limit--; |
| 5552 | } |
| 5553 | |
| 5554 | /* If we found a candidate to CSE to verify it is valid. */ |
| 5555 | if (vnresult && !accesses.is_empty ()) |
| 5556 | { |
| 5557 | tree vuse = vuse_ssa_val (gimple_vuse (stmt)); |
| 5558 | while (vnresult && vuse != vr1.vuse) |
| 5559 | { |
| 5560 | gimple *def = SSA_NAME_DEF_STMT (vuse)(tree_check ((vuse), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5560, __FUNCTION__, (SSA_NAME)))->ssa_name.def_stmt; |
| 5561 | for (auto &ref : accesses) |
| 5562 | { |
| 5563 | /* ??? stmt_may_clobber_ref_p_1 does per stmt constant |
| 5564 | analysis overhead that we might be able to cache. */ |
| 5565 | if (stmt_may_clobber_ref_p_1 (def, &ref, true)) |
| 5566 | { |
| 5567 | vnresult = NULLnullptr; |
| 5568 | break; |
| 5569 | } |
| 5570 | } |
| 5571 | vuse = vuse_ssa_val (gimple_vuse (def)); |
| 5572 | } |
| 5573 | } |
| 5574 | vr1.vuse = saved_vuse; |
| 5575 | vr1.hashcode = saved_hashcode; |
| 5576 | } |
| 5577 | |
| 5578 | if (vnresult) |
| 5579 | { |
| 5580 | if (vdef) |
| 5581 | { |
| 5582 | if (vnresult->result_vdef) |
| 5583 | changed |= set_ssa_val_to (vdef, vnresult->result_vdef); |
| 5584 | else if (!lhs && gimple_call_lhs (stmt)) |
| 5585 | /* If stmt has non-SSA_NAME lhs, value number the vdef to itself, |
| 5586 | as the call still acts as a lhs store. */ |
| 5587 | changed |= set_ssa_val_to (vdef, vdef); |
| 5588 | else |
| 5589 | /* If the call was discovered to be pure or const reflect |
| 5590 | that as far as possible. */ |
| 5591 | changed |= set_ssa_val_to (vdef, |
| 5592 | vuse_ssa_val (gimple_vuse (stmt))); |
| 5593 | } |
| 5594 | |
| 5595 | if (!vnresult->result && lhs) |
| 5596 | vnresult->result = lhs; |
| 5597 | |
| 5598 | if (vnresult->result && lhs) |
| 5599 | changed |= set_ssa_val_to (lhs, vnresult->result); |
| 5600 | } |
| 5601 | else |
| 5602 | { |
| 5603 | vn_reference_t vr2; |
| 5604 | vn_reference_s **slot; |
| 5605 | tree vdef_val = vdef; |
| 5606 | if (vdef) |
| 5607 | { |
| 5608 | /* If we value numbered an indirect functions function to |
| 5609 | one not clobbering memory value number its VDEF to its |
| 5610 | VUSE. */ |
| 5611 | tree fn = gimple_call_fn (stmt); |
| 5612 | if (fn && TREE_CODE (fn)((enum tree_code) (fn)->base.code) == SSA_NAME) |
| 5613 | { |
| 5614 | fn = SSA_VAL (fn); |
| 5615 | if (TREE_CODE (fn)((enum tree_code) (fn)->base.code) == ADDR_EXPR |
| 5616 | && TREE_CODE (TREE_OPERAND (fn, 0))((enum tree_code) ((*((const_cast<tree*> (tree_operand_check ((fn), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5616, __FUNCTION__))))))->base.code) == FUNCTION_DECL |
| 5617 | && (flags_from_decl_or_type (TREE_OPERAND (fn, 0)(*((const_cast<tree*> (tree_operand_check ((fn), (0), "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/tree-ssa-sccvn.cc" , 5617, __FUNCTION__)))))) |
| 5 |