1 /* Routines for reading trees from a file stream. 2 3 Copyright 2011 Free Software Foundation, Inc. 4 Contributed by Diego Novillo <dnovillo@google.com> 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free 10 Software Foundation; either version 3, or (at your option) any later 11 version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GCC; see the file COPYING3. If not see 20 <http://www.gnu.org/licenses/>. */ 21 22 #include "config.h" 23 #include "system.h" 24 #include "coretypes.h" 25 #include "diagnostic.h" 26 #include "tree.h" 27 #include "tree-flow.h" 28 #include "tree-streamer.h" 29 #include "data-streamer.h" 30 #include "streamer-hooks.h" 31 #include "lto-streamer.h" 32 33 /* Read a STRING_CST from the string table in DATA_IN using input 34 block IB. */ 35 36 tree 37 streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib) 38 { 39 unsigned int len; 40 const char * ptr; 41 42 ptr = streamer_read_indexed_string (data_in, ib, &len); 43 if (!ptr) 44 return NULL; 45 return build_string (len, ptr); 46 } 47 48 49 /* Read an IDENTIFIER from the string table in DATA_IN using input 50 block IB. */ 51 52 static tree 53 input_identifier (struct data_in *data_in, struct lto_input_block *ib) 54 { 55 unsigned int len; 56 const char *ptr; 57 58 ptr = streamer_read_indexed_string (data_in, ib, &len); 59 if (!ptr) 60 return NULL; 61 return get_identifier_with_length (ptr, len); 62 } 63 64 65 /* Read a chain of tree nodes from input block IB. DATA_IN contains 66 tables and descriptors for the file being read. */ 67 68 tree 69 streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in) 70 { 71 int i, count; 72 tree first, prev, curr; 73 74 first = prev = NULL_TREE; 75 count = streamer_read_hwi (ib); 76 for (i = 0; i < count; i++) 77 { 78 curr = stream_read_tree (ib, data_in); 79 if (prev) 80 TREE_CHAIN (prev) = curr; 81 else 82 first = curr; 83 84 TREE_CHAIN (curr) = NULL_TREE; 85 prev = curr; 86 } 87 88 return first; 89 } 90 91 92 /* Unpack all the non-pointer fields of the TS_BASE structure of 93 expression EXPR from bitpack BP. */ 94 95 static void 96 unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr) 97 { 98 /* Note that the code for EXPR has already been unpacked to create EXPR in 99 streamer_alloc_tree. */ 100 if (!TYPE_P (expr)) 101 { 102 TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1); 103 TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1); 104 TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1); 105 106 /* TREE_PUBLIC is used on types to indicate that the type 107 has a TYPE_CACHED_VALUES vector. This is not streamed out, 108 so we skip it here. */ 109 TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1); 110 } 111 else 112 bp_unpack_value (bp, 4); 113 TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1); 114 TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1); 115 if (DECL_P (expr)) 116 DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1); 117 else if (TYPE_P (expr)) 118 TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1); 119 else 120 bp_unpack_value (bp, 1); 121 TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1); 122 if (TYPE_P (expr)) 123 TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1); 124 else 125 TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1); 126 TREE_USED (expr) = (unsigned) bp_unpack_value (bp, 1); 127 TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1); 128 TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1); 129 TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1); 130 TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1); 131 TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1); 132 if (TYPE_P (expr)) 133 { 134 TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1); 135 TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8); 136 } 137 else if (TREE_CODE (expr) == SSA_NAME) 138 SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1); 139 else 140 bp_unpack_value (bp, 1); 141 } 142 143 144 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of 145 expression EXPR from bitpack BP. */ 146 147 static void 148 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr) 149 { 150 unsigned i; 151 REAL_VALUE_TYPE r; 152 REAL_VALUE_TYPE *rp; 153 154 r.cl = (unsigned) bp_unpack_value (bp, 2); 155 r.decimal = (unsigned) bp_unpack_value (bp, 1); 156 r.sign = (unsigned) bp_unpack_value (bp, 1); 157 r.signalling = (unsigned) bp_unpack_value (bp, 1); 158 r.canonical = (unsigned) bp_unpack_value (bp, 1); 159 r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS); 160 for (i = 0; i < SIGSZ; i++) 161 r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG); 162 163 rp = ggc_alloc_real_value (); 164 memcpy (rp, &r, sizeof (REAL_VALUE_TYPE)); 165 TREE_REAL_CST_PTR (expr) = rp; 166 } 167 168 169 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of 170 expression EXPR from bitpack BP. */ 171 172 static void 173 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr) 174 { 175 FIXED_VALUE_TYPE *fp = ggc_alloc_fixed_value (); 176 fp->mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE); 177 fp->data.low = bp_unpack_var_len_int (bp); 178 fp->data.high = bp_unpack_var_len_int (bp); 179 TREE_FIXED_CST_PTR (expr) = fp; 180 } 181 182 183 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure 184 of expression EXPR from bitpack BP. */ 185 186 static void 187 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr) 188 { 189 DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE); 190 DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1); 191 DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1); 192 DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1); 193 DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1); 194 DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1); 195 DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1); 196 DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1); 197 DECL_DEBUG_EXPR_IS_FROM (expr) = (unsigned) bp_unpack_value (bp, 1); 198 DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1); 199 DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1); 200 DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp); 201 202 if (TREE_CODE (expr) == LABEL_DECL) 203 { 204 DECL_ERROR_ISSUED (expr) = (unsigned) bp_unpack_value (bp, 1); 205 EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp); 206 207 /* Always assume an initial value of -1 for LABEL_DECL_UID to 208 force gimple_set_bb to recreate label_to_block_map. */ 209 LABEL_DECL_UID (expr) = -1; 210 } 211 212 if (TREE_CODE (expr) == FIELD_DECL) 213 { 214 DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1); 215 DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1); 216 expr->decl_common.off_align = bp_unpack_value (bp, 8); 217 } 218 219 if (TREE_CODE (expr) == RESULT_DECL 220 || TREE_CODE (expr) == PARM_DECL 221 || TREE_CODE (expr) == VAR_DECL) 222 { 223 DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1); 224 if (TREE_CODE (expr) == VAR_DECL 225 || TREE_CODE (expr) == PARM_DECL) 226 DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1); 227 DECL_RESTRICTED_P (expr) = (unsigned) bp_unpack_value (bp, 1); 228 } 229 } 230 231 232 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure 233 of expression EXPR from bitpack BP. */ 234 235 static void 236 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr) 237 { 238 DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1); 239 } 240 241 242 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure 243 of expression EXPR from bitpack BP. */ 244 245 static void 246 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr) 247 { 248 DECL_DEFER_OUTPUT (expr) = (unsigned) bp_unpack_value (bp, 1); 249 DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1); 250 DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1); 251 DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1); 252 DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1); 253 DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp, 1); 254 DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp, 2); 255 DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp, 1); 256 257 if (TREE_CODE (expr) == VAR_DECL) 258 { 259 DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1); 260 DECL_IN_TEXT_SECTION (expr) = (unsigned) bp_unpack_value (bp, 1); 261 DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1); 262 DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp, 3); 263 } 264 265 if (VAR_OR_FUNCTION_DECL_P (expr)) 266 { 267 priority_type p; 268 p = (priority_type) bp_unpack_var_len_unsigned (bp); 269 SET_DECL_INIT_PRIORITY (expr, p); 270 } 271 } 272 273 274 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure 275 of expression EXPR from bitpack BP. */ 276 277 static void 278 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr) 279 { 280 DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class, 281 BUILT_IN_LAST); 282 DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1); 283 DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1); 284 DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1); 285 DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1); 286 DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1); 287 DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1); 288 DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1); 289 DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1); 290 DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1); 291 DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1); 292 DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1); 293 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr) 294 = (unsigned) bp_unpack_value (bp, 1); 295 DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1); 296 DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1); 297 DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1); 298 DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1); 299 if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN) 300 { 301 DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp, 302 11); 303 if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL 304 && DECL_FUNCTION_CODE (expr) >= END_BUILTINS) 305 fatal_error ("machine independent builtin code out of range"); 306 else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD) 307 { 308 tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true); 309 if (!result || result == error_mark_node) 310 fatal_error ("target specific builtin not available"); 311 } 312 } 313 if (DECL_STATIC_DESTRUCTOR (expr)) 314 { 315 priority_type p; 316 p = (priority_type) bp_unpack_var_len_unsigned (bp); 317 SET_DECL_FINI_PRIORITY (expr, p); 318 } 319 } 320 321 322 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure 323 of expression EXPR from bitpack BP. */ 324 325 static void 326 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr) 327 { 328 enum machine_mode mode; 329 330 mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE); 331 SET_TYPE_MODE (expr, mode); 332 TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1); 333 TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1); 334 TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1); 335 if (RECORD_OR_UNION_TYPE_P (expr)) 336 TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1); 337 else if (TREE_CODE (expr) == ARRAY_TYPE) 338 TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1); 339 TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1); 340 TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1); 341 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (expr) 342 = (unsigned) bp_unpack_value (bp, 2); 343 TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1); 344 TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1); 345 TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp); 346 TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp); 347 TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp); 348 } 349 350 351 /* Unpack all the non-pointer fields of the TS_BLOCK structure 352 of expression EXPR from bitpack BP. */ 353 354 static void 355 unpack_ts_block_value_fields (struct bitpack_d *bp, tree expr) 356 { 357 BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1); 358 /* BLOCK_NUMBER is recomputed. */ 359 } 360 361 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL 362 structure of expression EXPR from bitpack BP. */ 363 364 static void 365 unpack_ts_translation_unit_decl_value_fields (struct bitpack_d *bp ATTRIBUTE_UNUSED, tree expr ATTRIBUTE_UNUSED) 366 { 367 } 368 369 /* Unpack all the non-pointer fields in EXPR into a bit pack. */ 370 371 static void 372 unpack_value_fields (struct bitpack_d *bp, tree expr) 373 { 374 enum tree_code code; 375 376 code = TREE_CODE (expr); 377 378 /* Note that all these functions are highly sensitive to changes in 379 the types and sizes of each of the fields being packed. */ 380 unpack_ts_base_value_fields (bp, expr); 381 382 if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST)) 383 unpack_ts_real_cst_value_fields (bp, expr); 384 385 if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST)) 386 unpack_ts_fixed_cst_value_fields (bp, expr); 387 388 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON)) 389 unpack_ts_decl_common_value_fields (bp, expr); 390 391 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL)) 392 unpack_ts_decl_wrtl_value_fields (bp, expr); 393 394 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS)) 395 unpack_ts_decl_with_vis_value_fields (bp, expr); 396 397 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL)) 398 unpack_ts_function_decl_value_fields (bp, expr); 399 400 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON)) 401 unpack_ts_type_common_value_fields (bp, expr); 402 403 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK)) 404 unpack_ts_block_value_fields (bp, expr); 405 406 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL)) 407 unpack_ts_translation_unit_decl_value_fields (bp, expr); 408 } 409 410 411 /* Read all the language-independent bitfield values for EXPR from IB. 412 Return the partially unpacked bitpack so the caller can unpack any other 413 bitfield values that the writer may have written. */ 414 415 struct bitpack_d 416 streamer_read_tree_bitfields (struct lto_input_block *ib, tree expr) 417 { 418 enum tree_code code; 419 struct bitpack_d bp; 420 421 /* Read the bitpack of non-pointer values from IB. */ 422 bp = streamer_read_bitpack (ib); 423 424 /* The first word in BP contains the code of the tree that we 425 are about to read. */ 426 code = (enum tree_code) bp_unpack_value (&bp, 16); 427 lto_tag_check (lto_tree_code_to_tag (code), 428 lto_tree_code_to_tag (TREE_CODE (expr))); 429 430 /* Unpack all the value fields from BP. */ 431 unpack_value_fields (&bp, expr); 432 433 return bp; 434 } 435 436 437 /* Materialize a new tree from input block IB using descriptors in 438 DATA_IN. The code for the new tree should match TAG. Store in 439 *IX_P the index into the reader cache where the new tree is stored. */ 440 441 tree 442 streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in, 443 enum LTO_tags tag) 444 { 445 enum tree_code code; 446 tree result; 447 #ifdef LTO_STREAMER_DEBUG 448 HOST_WIDEST_INT orig_address_in_writer; 449 #endif 450 451 result = NULL_TREE; 452 453 #ifdef LTO_STREAMER_DEBUG 454 /* Read the word representing the memory address for the tree 455 as it was written by the writer. This is useful when 456 debugging differences between the writer and reader. */ 457 orig_address_in_writer = streamer_read_hwi (ib); 458 gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer); 459 #endif 460 461 code = lto_tag_to_tree_code (tag); 462 463 /* We should never see an SSA_NAME tree. Only the version numbers of 464 SSA names are ever written out. See input_ssa_names. */ 465 gcc_assert (code != SSA_NAME); 466 467 /* Instantiate a new tree using the header data. */ 468 if (CODE_CONTAINS_STRUCT (code, TS_STRING)) 469 result = streamer_read_string_cst (data_in, ib); 470 else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER)) 471 result = input_identifier (data_in, ib); 472 else if (CODE_CONTAINS_STRUCT (code, TS_VEC)) 473 { 474 HOST_WIDE_INT len = streamer_read_hwi (ib); 475 result = make_tree_vec (len); 476 } 477 else if (CODE_CONTAINS_STRUCT (code, TS_BINFO)) 478 { 479 unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib); 480 result = make_tree_binfo (len); 481 } 482 else if (code == CALL_EXPR) 483 { 484 unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib); 485 return build_vl_exp (CALL_EXPR, nargs + 3); 486 } 487 else 488 { 489 /* For all other nodes, materialize the tree with a raw 490 make_node call. */ 491 result = make_node (code); 492 } 493 494 #ifdef LTO_STREAMER_DEBUG 495 /* Store the original address of the tree as seen by the writer 496 in RESULT's aux field. This is useful when debugging streaming 497 problems. This way, a debugging session can be started on 498 both writer and reader with a breakpoint using this address 499 value in both. */ 500 lto_orig_address_map (result, (intptr_t) orig_address_in_writer); 501 #endif 502 503 return result; 504 } 505 506 507 /* Read all pointer fields in the TS_COMMON structure of EXPR from input 508 block IB. DATA_IN contains tables and descriptors for the 509 file being read. */ 510 511 512 static void 513 lto_input_ts_common_tree_pointers (struct lto_input_block *ib, 514 struct data_in *data_in, tree expr) 515 { 516 if (TREE_CODE (expr) != IDENTIFIER_NODE) 517 TREE_TYPE (expr) = stream_read_tree (ib, data_in); 518 } 519 520 521 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input 522 block IB. DATA_IN contains tables and descriptors for the 523 file being read. */ 524 525 static void 526 lto_input_ts_vector_tree_pointers (struct lto_input_block *ib, 527 struct data_in *data_in, tree expr) 528 { 529 TREE_VECTOR_CST_ELTS (expr) = streamer_read_chain (ib, data_in); 530 } 531 532 533 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input 534 block IB. DATA_IN contains tables and descriptors for the 535 file being read. */ 536 537 static void 538 lto_input_ts_complex_tree_pointers (struct lto_input_block *ib, 539 struct data_in *data_in, tree expr) 540 { 541 TREE_REALPART (expr) = stream_read_tree (ib, data_in); 542 TREE_IMAGPART (expr) = stream_read_tree (ib, data_in); 543 } 544 545 546 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR 547 from input block IB. DATA_IN contains tables and descriptors for the 548 file being read. */ 549 550 static void 551 lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib, 552 struct data_in *data_in, tree expr) 553 { 554 DECL_NAME (expr) = stream_read_tree (ib, data_in); 555 DECL_CONTEXT (expr) = stream_read_tree (ib, data_in); 556 DECL_SOURCE_LOCATION (expr) = lto_input_location (ib, data_in); 557 } 558 559 560 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from 561 input block IB. DATA_IN contains tables and descriptors for the 562 file being read. */ 563 564 static void 565 lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib, 566 struct data_in *data_in, tree expr) 567 { 568 DECL_SIZE (expr) = stream_read_tree (ib, data_in); 569 DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in); 570 DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in); 571 572 /* Do not stream DECL_ABSTRACT_ORIGIN. We cannot handle debug information 573 for early inlining so drop it on the floor instead of ICEing in 574 dwarf2out.c. */ 575 576 if (TREE_CODE (expr) == PARM_DECL) 577 TREE_CHAIN (expr) = streamer_read_chain (ib, data_in); 578 579 if ((TREE_CODE (expr) == VAR_DECL 580 || TREE_CODE (expr) == PARM_DECL) 581 && DECL_HAS_VALUE_EXPR_P (expr)) 582 SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in)); 583 584 if (TREE_CODE (expr) == VAR_DECL) 585 { 586 tree dexpr = stream_read_tree (ib, data_in); 587 if (dexpr) 588 SET_DECL_DEBUG_EXPR (expr, dexpr); 589 } 590 } 591 592 593 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of 594 EXPR from input block IB. DATA_IN contains tables and descriptors for the 595 file being read. */ 596 597 static void 598 lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib, 599 struct data_in *data_in, tree expr) 600 { 601 if (TREE_CODE (expr) == FUNCTION_DECL) 602 { 603 DECL_ARGUMENTS (expr) = stream_read_tree (ib, data_in); 604 DECL_RESULT (expr) = stream_read_tree (ib, data_in); 605 } 606 else if (TREE_CODE (expr) == TYPE_DECL) 607 DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in); 608 DECL_VINDEX (expr) = stream_read_tree (ib, data_in); 609 } 610 611 612 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR 613 from input block IB. DATA_IN contains tables and descriptors for the 614 file being read. */ 615 616 static void 617 lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib, 618 struct data_in *data_in, tree expr) 619 { 620 tree id; 621 622 id = stream_read_tree (ib, data_in); 623 if (id) 624 { 625 gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE); 626 SET_DECL_ASSEMBLER_NAME (expr, id); 627 } 628 629 DECL_SECTION_NAME (expr) = stream_read_tree (ib, data_in); 630 DECL_COMDAT_GROUP (expr) = stream_read_tree (ib, data_in); 631 } 632 633 634 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from 635 input block IB. DATA_IN contains tables and descriptors for the 636 file being read. */ 637 638 static void 639 lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib, 640 struct data_in *data_in, tree expr) 641 { 642 DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in); 643 DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in); 644 DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in); 645 DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in); 646 DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in); 647 } 648 649 650 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR 651 from input block IB. DATA_IN contains tables and descriptors for the 652 file being read. */ 653 654 static void 655 lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib, 656 struct data_in *data_in, tree expr) 657 { 658 /* DECL_STRUCT_FUNCTION is handled by lto_input_function. FIXME lto, 659 maybe it should be handled here? */ 660 DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in); 661 DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree (ib, data_in); 662 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in); 663 664 /* If the file contains a function with an EH personality set, 665 then it was compiled with -fexceptions. In that case, initialize 666 the backend EH machinery. */ 667 if (DECL_FUNCTION_PERSONALITY (expr)) 668 lto_init_eh (); 669 } 670 671 672 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from 673 input block IB. DATA_IN contains tables and descriptors for the file 674 being read. */ 675 676 static void 677 lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib, 678 struct data_in *data_in, tree expr) 679 { 680 TYPE_SIZE (expr) = stream_read_tree (ib, data_in); 681 TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in); 682 TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in); 683 TYPE_NAME (expr) = stream_read_tree (ib, data_in); 684 /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO. They will be 685 reconstructed during fixup. */ 686 /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists 687 during fixup. */ 688 TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in); 689 TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in); 690 /* TYPE_CANONICAL gets re-computed during type merging. */ 691 TYPE_CANONICAL (expr) = NULL_TREE; 692 TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in); 693 } 694 695 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR 696 from input block IB. DATA_IN contains tables and descriptors for the 697 file being read. */ 698 699 static void 700 lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib, 701 struct data_in *data_in, 702 tree expr) 703 { 704 if (TREE_CODE (expr) == ENUMERAL_TYPE) 705 TYPE_VALUES (expr) = stream_read_tree (ib, data_in); 706 else if (TREE_CODE (expr) == ARRAY_TYPE) 707 TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in); 708 else if (RECORD_OR_UNION_TYPE_P (expr)) 709 TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in); 710 else if (TREE_CODE (expr) == FUNCTION_TYPE 711 || TREE_CODE (expr) == METHOD_TYPE) 712 TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in); 713 714 if (!POINTER_TYPE_P (expr)) 715 TYPE_MINVAL (expr) = stream_read_tree (ib, data_in); 716 TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in); 717 if (RECORD_OR_UNION_TYPE_P (expr)) 718 TYPE_BINFO (expr) = stream_read_tree (ib, data_in); 719 } 720 721 722 /* Read all pointer fields in the TS_LIST structure of EXPR from input 723 block IB. DATA_IN contains tables and descriptors for the 724 file being read. */ 725 726 static void 727 lto_input_ts_list_tree_pointers (struct lto_input_block *ib, 728 struct data_in *data_in, tree expr) 729 { 730 TREE_PURPOSE (expr) = stream_read_tree (ib, data_in); 731 TREE_VALUE (expr) = stream_read_tree (ib, data_in); 732 TREE_CHAIN (expr) = streamer_read_chain (ib, data_in); 733 } 734 735 736 /* Read all pointer fields in the TS_VEC structure of EXPR from input 737 block IB. DATA_IN contains tables and descriptors for the 738 file being read. */ 739 740 static void 741 lto_input_ts_vec_tree_pointers (struct lto_input_block *ib, 742 struct data_in *data_in, tree expr) 743 { 744 int i; 745 746 /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to 747 instantiate EXPR. */ 748 for (i = 0; i < TREE_VEC_LENGTH (expr); i++) 749 TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in); 750 } 751 752 753 /* Read all pointer fields in the TS_EXP structure of EXPR from input 754 block IB. DATA_IN contains tables and descriptors for the 755 file being read. */ 756 757 758 static void 759 lto_input_ts_exp_tree_pointers (struct lto_input_block *ib, 760 struct data_in *data_in, tree expr) 761 { 762 int i, length; 763 location_t loc; 764 765 length = streamer_read_hwi (ib); 766 gcc_assert (length == TREE_OPERAND_LENGTH (expr)); 767 768 for (i = 0; i < length; i++) 769 TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in); 770 771 loc = lto_input_location (ib, data_in); 772 SET_EXPR_LOCATION (expr, loc); 773 TREE_BLOCK (expr) = stream_read_tree (ib, data_in); 774 } 775 776 777 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input 778 block IB. DATA_IN contains tables and descriptors for the 779 file being read. */ 780 781 static void 782 lto_input_ts_block_tree_pointers (struct lto_input_block *ib, 783 struct data_in *data_in, tree expr) 784 { 785 /* Do not stream BLOCK_SOURCE_LOCATION. We cannot handle debug information 786 for early inlining so drop it on the floor instead of ICEing in 787 dwarf2out.c. */ 788 BLOCK_VARS (expr) = streamer_read_chain (ib, data_in); 789 790 /* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information 791 for early inlining so drop it on the floor instead of ICEing in 792 dwarf2out.c. */ 793 794 BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in); 795 796 /* Do not stream BLOCK_ABSTRACT_ORIGIN. We cannot handle debug information 797 for early inlining so drop it on the floor instead of ICEing in 798 dwarf2out.c. */ 799 BLOCK_FRAGMENT_ORIGIN (expr) = stream_read_tree (ib, data_in); 800 BLOCK_FRAGMENT_CHAIN (expr) = stream_read_tree (ib, data_in); 801 802 /* We re-compute BLOCK_SUBBLOCKS of our parent here instead 803 of streaming it. For non-BLOCK BLOCK_SUPERCONTEXTs we still 804 stream the child relationship explicitly. */ 805 if (BLOCK_SUPERCONTEXT (expr) 806 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK) 807 { 808 BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)); 809 BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr; 810 } 811 812 /* The global block is rooted at the TU decl. Hook it here to 813 avoid the need to stream in this block during WPA time. */ 814 else if (BLOCK_SUPERCONTEXT (expr) 815 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL) 816 DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr; 817 818 /* The function-level block is connected at the time we read in 819 function bodies for the same reason. */ 820 } 821 822 823 /* Read all pointer fields in the TS_BINFO structure of EXPR from input 824 block IB. DATA_IN contains tables and descriptors for the 825 file being read. */ 826 827 static void 828 lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib, 829 struct data_in *data_in, tree expr) 830 { 831 unsigned i, len; 832 tree t; 833 834 /* Note that the number of slots in EXPR was read in 835 streamer_alloc_tree when instantiating EXPR. However, the 836 vector is empty so we cannot rely on VEC_length to know how many 837 elements to read. So, this list is emitted as a 0-terminated 838 list on the writer side. */ 839 do 840 { 841 t = stream_read_tree (ib, data_in); 842 if (t) 843 VEC_quick_push (tree, BINFO_BASE_BINFOS (expr), t); 844 } 845 while (t); 846 847 BINFO_OFFSET (expr) = stream_read_tree (ib, data_in); 848 BINFO_VTABLE (expr) = stream_read_tree (ib, data_in); 849 BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in); 850 851 len = streamer_read_uhwi (ib); 852 if (len > 0) 853 { 854 VEC_reserve_exact (tree, gc, BINFO_BASE_ACCESSES (expr), len); 855 for (i = 0; i < len; i++) 856 { 857 tree a = stream_read_tree (ib, data_in); 858 VEC_quick_push (tree, BINFO_BASE_ACCESSES (expr), a); 859 } 860 } 861 862 BINFO_INHERITANCE_CHAIN (expr) = stream_read_tree (ib, data_in); 863 BINFO_SUBVTT_INDEX (expr) = stream_read_tree (ib, data_in); 864 BINFO_VPTR_INDEX (expr) = stream_read_tree (ib, data_in); 865 } 866 867 868 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from 869 input block IB. DATA_IN contains tables and descriptors for the 870 file being read. */ 871 872 static void 873 lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib, 874 struct data_in *data_in, tree expr) 875 { 876 unsigned i, len; 877 878 len = streamer_read_uhwi (ib); 879 for (i = 0; i < len; i++) 880 { 881 tree index, value; 882 883 index = stream_read_tree (ib, data_in); 884 value = stream_read_tree (ib, data_in); 885 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (expr), index, value); 886 } 887 } 888 889 890 /* Input a TS_TARGET_OPTION tree from IB into EXPR. */ 891 892 static void 893 lto_input_ts_target_option (struct lto_input_block *ib, tree expr) 894 { 895 unsigned i, len; 896 struct bitpack_d bp; 897 struct cl_target_option *t = TREE_TARGET_OPTION (expr); 898 899 bp = streamer_read_bitpack (ib); 900 len = sizeof (struct cl_target_option); 901 for (i = 0; i < len; i++) 902 ((unsigned char *)t)[i] = bp_unpack_value (&bp, 8); 903 if (bp_unpack_value (&bp, 32) != 0x12345678) 904 fatal_error ("cl_target_option size mismatch in LTO reader and writer"); 905 } 906 907 /* Input a TS_OPTIMIZATION tree from IB into EXPR. */ 908 909 static void 910 lto_input_ts_optimization (struct lto_input_block *ib, tree expr) 911 { 912 unsigned i, len; 913 struct bitpack_d bp; 914 struct cl_optimization *t = TREE_OPTIMIZATION (expr); 915 916 bp = streamer_read_bitpack (ib); 917 len = sizeof (struct cl_optimization); 918 for (i = 0; i < len; i++) 919 ((unsigned char *)t)[i] = bp_unpack_value (&bp, 8); 920 if (bp_unpack_value (&bp, 32) != 0x12345678) 921 fatal_error ("cl_optimization size mismatch in LTO reader and writer"); 922 } 923 924 /* Input a TS_TRANSLATION_UNIT_DECL tree from IB and DATA_IN into EXPR. */ 925 926 static void 927 lto_input_ts_translation_unit_decl_tree_pointers (struct lto_input_block *ib, 928 struct data_in *data_in, 929 tree expr) 930 { 931 TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (streamer_read_string (data_in, ib)); 932 VEC_safe_push (tree, gc, all_translation_units, expr); 933 } 934 935 /* Read all pointer fields in EXPR from input block IB. DATA_IN 936 contains tables and descriptors for the file being read. */ 937 938 void 939 streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in, 940 tree expr) 941 { 942 enum tree_code code; 943 944 code = TREE_CODE (expr); 945 946 if (CODE_CONTAINS_STRUCT (code, TS_TYPED)) 947 lto_input_ts_common_tree_pointers (ib, data_in, expr); 948 949 if (CODE_CONTAINS_STRUCT (code, TS_VECTOR)) 950 lto_input_ts_vector_tree_pointers (ib, data_in, expr); 951 952 if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX)) 953 lto_input_ts_complex_tree_pointers (ib, data_in, expr); 954 955 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL)) 956 lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr); 957 958 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON)) 959 lto_input_ts_decl_common_tree_pointers (ib, data_in, expr); 960 961 if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON)) 962 lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr); 963 964 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS)) 965 lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr); 966 967 if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL)) 968 lto_input_ts_field_decl_tree_pointers (ib, data_in, expr); 969 970 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL)) 971 lto_input_ts_function_decl_tree_pointers (ib, data_in, expr); 972 973 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON)) 974 lto_input_ts_type_common_tree_pointers (ib, data_in, expr); 975 976 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON)) 977 lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr); 978 979 if (CODE_CONTAINS_STRUCT (code, TS_LIST)) 980 lto_input_ts_list_tree_pointers (ib, data_in, expr); 981 982 if (CODE_CONTAINS_STRUCT (code, TS_VEC)) 983 lto_input_ts_vec_tree_pointers (ib, data_in, expr); 984 985 if (CODE_CONTAINS_STRUCT (code, TS_EXP)) 986 lto_input_ts_exp_tree_pointers (ib, data_in, expr); 987 988 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK)) 989 lto_input_ts_block_tree_pointers (ib, data_in, expr); 990 991 if (CODE_CONTAINS_STRUCT (code, TS_BINFO)) 992 lto_input_ts_binfo_tree_pointers (ib, data_in, expr); 993 994 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR)) 995 lto_input_ts_constructor_tree_pointers (ib, data_in, expr); 996 997 if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION)) 998 lto_input_ts_target_option (ib, expr); 999 1000 if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION)) 1001 lto_input_ts_optimization (ib, expr); 1002 1003 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL)) 1004 lto_input_ts_translation_unit_decl_tree_pointers (ib, data_in, expr); 1005 } 1006 1007 1008 /* Read and INTEGER_CST node from input block IB using the per-file 1009 context in DATA_IN. */ 1010 1011 tree 1012 streamer_read_integer_cst (struct lto_input_block *ib, struct data_in *data_in) 1013 { 1014 tree result, type; 1015 HOST_WIDE_INT low, high; 1016 bool overflow_p; 1017 1018 type = stream_read_tree (ib, data_in); 1019 overflow_p = (streamer_read_uchar (ib) != 0); 1020 low = streamer_read_uhwi (ib); 1021 high = streamer_read_uhwi (ib); 1022 result = build_int_cst_wide (type, low, high); 1023 1024 /* If the original constant had overflown, build a replica of RESULT to 1025 avoid modifying the shared constant returned by build_int_cst_wide. */ 1026 if (overflow_p) 1027 { 1028 result = copy_node (result); 1029 TREE_OVERFLOW (result) = 1; 1030 } 1031 1032 return result; 1033 } 1034 1035 1036 /* Read an index IX from input block IB and return the tree node at 1037 DATA_IN->FILE_DATA->GLOBALS_INDEX[IX]. */ 1038 1039 tree 1040 streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in) 1041 { 1042 unsigned HOST_WIDE_INT ix; 1043 tree result; 1044 enum LTO_tags expected_tag; 1045 1046 ix = streamer_read_uhwi (ib); 1047 expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS); 1048 1049 result = streamer_tree_cache_get (data_in->reader_cache, ix); 1050 gcc_assert (result 1051 && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag)); 1052 1053 return result; 1054 } 1055 1056 1057 /* Read a code and class from input block IB and return the 1058 corresponding builtin. DATA_IN is as in stream_read_tree. */ 1059 1060 tree 1061 streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in) 1062 { 1063 enum built_in_class fclass; 1064 enum built_in_function fcode; 1065 const char *asmname; 1066 tree result; 1067 1068 fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST); 1069 gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD); 1070 1071 fcode = (enum built_in_function) streamer_read_uhwi (ib); 1072 1073 if (fclass == BUILT_IN_NORMAL) 1074 { 1075 if (fcode >= END_BUILTINS) 1076 fatal_error ("machine independent builtin code out of range"); 1077 result = builtin_decl_explicit (fcode); 1078 gcc_assert (result); 1079 } 1080 else if (fclass == BUILT_IN_MD) 1081 { 1082 result = targetm.builtin_decl (fcode, true); 1083 if (!result || result == error_mark_node) 1084 fatal_error ("target specific builtin not available"); 1085 } 1086 else 1087 gcc_unreachable (); 1088 1089 asmname = streamer_read_string (data_in, ib); 1090 if (asmname) 1091 set_builtin_user_assembler_name (result, asmname); 1092 1093 streamer_tree_cache_append (data_in->reader_cache, result); 1094 1095 return result; 1096 } 1097