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