gcc/tree-streamer-in.c

   1 /* Routines for reading trees from a file stream.
   2
   3    Copyright (C) 2011-2014 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 "stringpool.h"
  28 #include "basic-block.h"
  29 #include "tree-ssa-alias.h"
  30 #include "internal-fn.h"
  31 #include "gimple-expr.h"
  32 #include "is-a.h"
  33 #include "gimple.h"
  34 #include "tree-streamer.h"
  35 #include "data-streamer.h"
  36 #include "streamer-hooks.h"
  37 #include "lto-streamer.h"
  38
  39 /* Read a STRING_CST from the string table in DATA_IN using input
  40    block IB.  */
  41
  42 tree
  43 streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib)
  44 {
  45   unsigned int len;
  46   const char * ptr;
  47
  48   ptr = streamer_read_indexed_string (data_in, ib, &len);
  49   if (!ptr)
  50     return NULL;
  51   return build_string (len, ptr);
  52 }
  53
  54
  55 /* Read an IDENTIFIER from the string table in DATA_IN using input
  56    block IB.  */
  57
  58 static tree
  59 input_identifier (struct data_in *data_in, struct lto_input_block *ib)
  60 {
  61   unsigned int len;
  62   const char *ptr;
  63
  64   ptr = streamer_read_indexed_string (data_in, ib, &len);
  65   if (!ptr)
  66     return NULL;
  67   return get_identifier_with_length (ptr, len);
  68 }
  69
  70
  71 /* Read a chain of tree nodes from input block IB. DATA_IN contains
  72    tables and descriptors for the file being read.  */
  73
  74 tree
  75 streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in)
  76 {
  77   tree first, prev, curr;
  78
  79   /* The chain is written as NULL terminated list of trees.  */
  80   first = prev = NULL_TREE;
  81   do
  82     {
  83       curr = stream_read_tree (ib, data_in);
  84       if (prev)
  85         TREE_CHAIN (prev) = curr;
  86       else
  87         first = curr;
  88
  89       prev = curr;
  90     }
  91   while (curr);
  92
  93   return first;
  94 }
  95
  96
  97 /* Unpack all the non-pointer fields of the TS_BASE structure of
  98    expression EXPR from bitpack BP.  */
  99
 100 static void
 101 unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
 102 {
 103   /* Note that the code for EXPR has already been unpacked to create EXPR in
 104      streamer_alloc_tree.  */
 105   if (!TYPE_P (expr))
 106     {
 107       TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1);
 108       TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1);
 109       TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 110
 111       /* TREE_PUBLIC is used on types to indicate that the type
 112          has a TYPE_CACHED_VALUES vector.  This is not streamed out,
 113          so we skip it here.  */
 114       TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1);
 115     }
 116   else
 117     bp_unpack_value (bp, 4);
 118   TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 119   TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1);
 120   if (DECL_P (expr))
 121     DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
 122   else if (TYPE_P (expr))
 123     TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
 124   else
 125     bp_unpack_value (bp, 1);
 126   TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
 127   if (TYPE_P (expr))
 128     TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 129   else
 130     TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
 131   TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
 132   TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
 133   if (TREE_CODE (expr) != TREE_BINFO)
 134     TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
 135   TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
 136   TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
 137   if (TYPE_P (expr))
 138     {
 139       TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
 140       TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
 141     }
 142   else if (TREE_CODE (expr) == SSA_NAME)
 143     SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
 144   else
 145     bp_unpack_value (bp, 1);
 146 }
 147
 148
 149 /* Unpack all the non-pointer fields of the TS_INT_CST structure of
 150    expression EXPR from bitpack BP.  */
 151
 152 static void
 153 unpack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
 154 {
 155   TREE_INT_CST_LOW (expr) = bp_unpack_var_len_unsigned (bp);
 156   TREE_INT_CST_HIGH (expr) = bp_unpack_var_len_int (bp);
 157 }
 158
 159
 160 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of
 161    expression EXPR from bitpack BP.  */
 162
 163 static void
 164 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
 165 {
 166   unsigned i;
 167   REAL_VALUE_TYPE r;
 168   REAL_VALUE_TYPE *rp;
 169
 170   r.cl = (unsigned) bp_unpack_value (bp, 2);
 171   r.decimal = (unsigned) bp_unpack_value (bp, 1);
 172   r.sign = (unsigned) bp_unpack_value (bp, 1);
 173   r.signalling = (unsigned) bp_unpack_value (bp, 1);
 174   r.canonical = (unsigned) bp_unpack_value (bp, 1);
 175   r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
 176   for (i = 0; i < SIGSZ; i++)
 177     r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
 178
 179   rp = ggc_alloc_real_value ();
 180   memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
 181   TREE_REAL_CST_PTR (expr) = rp;
 182 }
 183
 184
 185 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
 186    expression EXPR from bitpack BP.  */
 187
 188 static void
 189 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 190 {
 191   FIXED_VALUE_TYPE *fp = ggc_alloc_fixed_value ();
 192   fp->mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
 193   fp->data.low = bp_unpack_var_len_int (bp);
 194   fp->data.high = bp_unpack_var_len_int (bp);
 195   TREE_FIXED_CST_PTR (expr) = fp;
 196 }
 197
 198 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
 199    of expression EXPR from bitpack BP.  */
 200
 201 static void
 202 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 203 {
 204   DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
 205   DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 206   DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 207   DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 208   DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
 209   DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 210   DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 211   DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 212   DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 213   DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 214   DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
 215
 216   if (TREE_CODE (expr) == LABEL_DECL)
 217     {
 218       EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
 219
 220       /* Always assume an initial value of -1 for LABEL_DECL_UID to
 221          force gimple_set_bb to recreate label_to_block_map.  */
 222       LABEL_DECL_UID (expr) = -1;
 223     }
 224
 225   if (TREE_CODE (expr) == FIELD_DECL)
 226     {
 227       DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 228       DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 229       expr->decl_common.off_align = bp_unpack_value (bp, 8);
 230     }
 231
 232   if (TREE_CODE (expr) == VAR_DECL)
 233     {
 234       DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 235       DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
 236     }
 237
 238   if (TREE_CODE (expr) == RESULT_DECL
 239       || TREE_CODE (expr) == PARM_DECL
 240       || TREE_CODE (expr) == VAR_DECL)
 241     {
 242       DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
 243       if (TREE_CODE (expr) == VAR_DECL
 244           || TREE_CODE (expr) == PARM_DECL)
 245         DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 246     }
 247 }
 248
 249
 250 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
 251    of expression EXPR from bitpack BP.  */
 252
 253 static void
 254 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 255 {
 256   DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 257 }
 258
 259
 260 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 261    of expression EXPR from bitpack BP.  */
 262
 263 static void
 264 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 265 {
 266   DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
 267   DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 268   DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
 269   DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp,  1);
 270   DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp,  1);
 271   DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp,  2);
 272   DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp,  1);
 273
 274   if (TREE_CODE (expr) == VAR_DECL)
 275     {
 276       DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 277       DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
 278       DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp,  3);
 279     }
 280
 281   if (TREE_CODE (expr) == FUNCTION_DECL)
 282     {
 283       DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 284       DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 285       DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 286     }
 287   if (VAR_OR_FUNCTION_DECL_P (expr))
 288     {
 289       priority_type p;
 290       p = (priority_type) bp_unpack_var_len_unsigned (bp);
 291       SET_DECL_INIT_PRIORITY (expr, p);
 292     }
 293 }
 294
 295
 296 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
 297    of expression EXPR from bitpack BP.  */
 298
 299 static void
 300 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 301 {
 302   DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
 303                                                BUILT_IN_LAST);
 304   DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 305   DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 306   DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 307   DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
 308   DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
 309   DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
 310   DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
 311   DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
 312   DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 313   DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
 314   DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 315   DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
 316                         = (unsigned) bp_unpack_value (bp, 1);
 317   DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
 318   DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
 319   DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 320   DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 321   if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
 322     {
 323       DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
 324                                                                             11);
 325       if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
 326           && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
 327         fatal_error ("machine independent builtin code out of range");
 328       else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
 329         {
 330           tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
 331           if (!result || result == error_mark_node)
 332             fatal_error ("target specific builtin not available");
 333         }
 334     }
 335   if (DECL_STATIC_DESTRUCTOR (expr))
 336     {
 337       priority_type p;
 338       p = (priority_type) bp_unpack_var_len_unsigned (bp);
 339       SET_DECL_FINI_PRIORITY (expr, p);
 340     }
 341 }
 342
 343
 344 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
 345    of expression EXPR from bitpack BP.  */
 346
 347 static void
 348 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 349 {
 350   enum machine_mode mode;
 351
 352   mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
 353   SET_TYPE_MODE (expr, mode);
 354   TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
 355   TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1);
 356   TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1);
 357   if (RECORD_OR_UNION_TYPE_P (expr))
 358     {
 359       TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
 360       TYPE_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 361     }
 362   else if (TREE_CODE (expr) == ARRAY_TYPE)
 363     TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
 364   TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 365   TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
 366   TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 367   TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 368   TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
 369   TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp);
 370   TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp);
 371 }
 372
 373
 374 /* Unpack all the non-pointer fields of the TS_BLOCK structure
 375    of expression EXPR from bitpack BP.  */
 376
 377 static void
 378 unpack_ts_block_value_fields (struct data_in *data_in,
 379                               struct bitpack_d *bp, tree expr)
 380 {
 381   BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
 382   /* BLOCK_NUMBER is recomputed.  */
 383   BLOCK_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
 384 }
 385
 386 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
 387    structure of expression EXPR from bitpack BP.  */
 388
 389 static void
 390 unpack_ts_translation_unit_decl_value_fields (struct data_in *data_in,
 391                                               struct bitpack_d *bp, tree expr)
 392 {
 393   TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
 394   vec_safe_push (all_translation_units, expr);
 395 }
 396
 397 /* Unpack a TS_OPTIMIZATION tree from BP into EXPR.  */
 398
 399 static void
 400 unpack_ts_optimization (struct bitpack_d *bp, tree expr)
 401 {
 402   unsigned i, len;
 403   struct cl_optimization *t = TREE_OPTIMIZATION (expr);
 404
 405   len = sizeof (struct cl_optimization);
 406   for (i = 0; i < len; i++)
 407     ((unsigned char *)t)[i] = bp_unpack_value (bp, 8);
 408   if (bp_unpack_value (bp, 32) != 0x12345678)
 409     fatal_error ("cl_optimization size mismatch in LTO reader and writer");
 410 }
 411
 412
 413 /* Unpack all the non-pointer fields of the TS_OMP_CLAUSE
 414    structure of expression EXPR from bitpack BP.  */
 415
 416 static void
 417 unpack_ts_omp_clause_value_fields (struct data_in *data_in,
 418                                    struct bitpack_d *bp, tree expr)
 419 {
 420   OMP_CLAUSE_LOCATION (expr) = stream_input_location (bp, data_in);
 421   switch (OMP_CLAUSE_CODE (expr))
 422     {
 423     case OMP_CLAUSE_DEFAULT:
 424       OMP_CLAUSE_DEFAULT_KIND (expr)
 425         = bp_unpack_enum (bp, omp_clause_default_kind,
 426                           OMP_CLAUSE_DEFAULT_LAST);
 427       break;
 428     case OMP_CLAUSE_SCHEDULE:
 429       OMP_CLAUSE_SCHEDULE_KIND (expr)
 430         = bp_unpack_enum (bp, omp_clause_schedule_kind,
 431                           OMP_CLAUSE_SCHEDULE_LAST);
 432       break;
 433     case OMP_CLAUSE_DEPEND:
 434       OMP_CLAUSE_DEPEND_KIND (expr)
 435         = bp_unpack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST);
 436       break;
 437     case OMP_CLAUSE_MAP:
 438       OMP_CLAUSE_MAP_KIND (expr)
 439         = bp_unpack_enum (bp, omp_clause_map_kind, OMP_CLAUSE_MAP_LAST);
 440       break;
 441     case OMP_CLAUSE_PROC_BIND:
 442       OMP_CLAUSE_PROC_BIND_KIND (expr)
 443         = bp_unpack_enum (bp, omp_clause_proc_bind_kind,
 444                           OMP_CLAUSE_PROC_BIND_LAST);
 445       break;
 446     case OMP_CLAUSE_REDUCTION:
 447       OMP_CLAUSE_REDUCTION_CODE (expr)
 448         = bp_unpack_enum (bp, tree_code, MAX_TREE_CODES);
 449       break;
 450     default:
 451       break;
 452     }
 453 }
 454
 455 /* Unpack all the non-pointer fields in EXPR into a bit pack.  */
 456
 457 static void
 458 unpack_value_fields (struct data_in *data_in, struct bitpack_d *bp, tree expr)
 459 {
 460   enum tree_code code;
 461
 462   code = TREE_CODE (expr);
 463
 464   /* Note that all these functions are highly sensitive to changes in
 465      the types and sizes of each of the fields being packed.  */
 466   unpack_ts_base_value_fields (bp, expr);
 467
 468   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 469     unpack_ts_int_cst_value_fields (bp, expr);
 470
 471   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 472     unpack_ts_real_cst_value_fields (bp, expr);
 473
 474   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 475     unpack_ts_fixed_cst_value_fields (bp, expr);
 476
 477   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 478     DECL_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
 479
 480   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 481     unpack_ts_decl_common_value_fields (bp, expr);
 482
 483   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 484     unpack_ts_decl_wrtl_value_fields (bp, expr);
 485
 486   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 487     unpack_ts_decl_with_vis_value_fields (bp, expr);
 488
 489   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 490     unpack_ts_function_decl_value_fields (bp, expr);
 491
 492   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 493     unpack_ts_type_common_value_fields (bp, expr);
 494
 495   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 496     SET_EXPR_LOCATION (expr, stream_input_location (bp, data_in));
 497
 498   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 499     unpack_ts_block_value_fields (data_in, bp, expr);
 500
 501   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 502     unpack_ts_translation_unit_decl_value_fields (data_in, bp, expr);
 503
 504   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
 505     gcc_unreachable ();
 506
 507   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 508     unpack_ts_optimization (bp, expr);
 509
 510   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 511     {
 512       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
 513       if (length > 0)
 514         vec_safe_grow (BINFO_BASE_ACCESSES (expr), length);
 515     }
 516
 517   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 518     {
 519       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
 520       if (length > 0)
 521         vec_safe_grow (CONSTRUCTOR_ELTS (expr), length);
 522     }
 523
 524   if (code == OMP_CLAUSE)
 525     unpack_ts_omp_clause_value_fields (data_in, bp, expr);
 526 }
 527
 528
 529 /* Read all the language-independent bitfield values for EXPR from IB.
 530    Return the partially unpacked bitpack so the caller can unpack any other
 531    bitfield values that the writer may have written.  */
 532
 533 struct bitpack_d
 534 streamer_read_tree_bitfields (struct lto_input_block *ib,
 535                               struct data_in *data_in, tree expr)
 536 {
 537   enum tree_code code;
 538   struct bitpack_d bp;
 539
 540   /* Read the bitpack of non-pointer values from IB.  */
 541   bp = streamer_read_bitpack (ib);
 542
 543   /* The first word in BP contains the code of the tree that we
 544      are about to read.  */
 545   code = (enum tree_code) bp_unpack_value (&bp, 16);
 546   lto_tag_check (lto_tree_code_to_tag (code),
 547                  lto_tree_code_to_tag (TREE_CODE (expr)));
 548
 549   /* Unpack all the value fields from BP.  */
 550   unpack_value_fields (data_in, &bp, expr);
 551
 552   return bp;
 553 }
 554
 555
 556 /* Materialize a new tree from input block IB using descriptors in
 557    DATA_IN.  The code for the new tree should match TAG.  Store in
 558    *IX_P the index into the reader cache where the new tree is stored.  */
 559
 560 tree
 561 streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
 562                      enum LTO_tags tag)
 563 {
 564   enum tree_code code;
 565   tree result;
 566 #ifdef LTO_STREAMER_DEBUG
 567   HOST_WIDEST_INT orig_address_in_writer;
 568 #endif
 569
 570   result = NULL_TREE;
 571
 572 #ifdef LTO_STREAMER_DEBUG
 573   /* Read the word representing the memory address for the tree
 574      as it was written by the writer.  This is useful when
 575      debugging differences between the writer and reader.  */
 576   orig_address_in_writer = streamer_read_hwi (ib);
 577   gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
 578 #endif
 579
 580   code = lto_tag_to_tree_code (tag);
 581
 582   /* We should never see an SSA_NAME tree.  Only the version numbers of
 583      SSA names are ever written out.  See input_ssa_names.  */
 584   gcc_assert (code != SSA_NAME);
 585
 586   /* Instantiate a new tree using the header data.  */
 587   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
 588     result = streamer_read_string_cst (data_in, ib);
 589   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
 590     result = input_identifier (data_in, ib);
 591   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 592     {
 593       HOST_WIDE_INT len = streamer_read_hwi (ib);
 594       result = make_tree_vec (len);
 595     }
 596   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 597     {
 598       HOST_WIDE_INT len = streamer_read_hwi (ib);
 599       result = make_vector (len);
 600     }
 601   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 602     {
 603       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 604       result = make_tree_binfo (len);
 605     }
 606   else if (code == CALL_EXPR)
 607     {
 608       unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
 609       return build_vl_exp (CALL_EXPR, nargs + 3);
 610     }
 611   else if (code == OMP_CLAUSE)
 612     {
 613       enum omp_clause_code subcode
 614         = (enum omp_clause_code) streamer_read_uhwi (ib);
 615       return build_omp_clause (UNKNOWN_LOCATION, subcode);
 616     }
 617   else
 618     {
 619       /* For all other nodes, materialize the tree with a raw
 620          make_node call.  */
 621       result = make_node (code);
 622     }
 623
 624 #ifdef LTO_STREAMER_DEBUG
 625   /* Store the original address of the tree as seen by the writer
 626      in RESULT's aux field.  This is useful when debugging streaming
 627      problems.  This way, a debugging session can be started on
 628      both writer and reader with a breakpoint using this address
 629      value in both.  */
 630   lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
 631 #endif
 632
 633   return result;
 634 }
 635
 636
 637 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
 638    block IB.  DATA_IN contains tables and descriptors for the
 639    file being read.  */
 640
 641
 642 static void
 643 lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
 644                                    struct data_in *data_in, tree expr)
 645 {
 646   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 647     TREE_TYPE (expr) = stream_read_tree (ib, data_in);
 648 }
 649
 650
 651 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
 652    block IB.  DATA_IN contains tables and descriptors for the
 653    file being read.  */
 654
 655 static void
 656 lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
 657                                    struct data_in *data_in, tree expr)
 658 {
 659   unsigned i;
 660   for (i = 0; i < VECTOR_CST_NELTS (expr); ++i)
 661     VECTOR_CST_ELT (expr, i) = stream_read_tree (ib, data_in);
 662 }
 663
 664
 665 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
 666    block IB.  DATA_IN contains tables and descriptors for the
 667    file being read.  */
 668
 669 static void
 670 lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
 671                                     struct data_in *data_in, tree expr)
 672 {
 673   TREE_REALPART (expr) = stream_read_tree (ib, data_in);
 674   TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
 675 }
 676
 677
 678 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 679    from input block IB.  DATA_IN contains tables and descriptors for the
 680    file being read.  */
 681
 682 static void
 683 lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
 684                                          struct data_in *data_in, tree expr)
 685 {
 686   DECL_NAME (expr) = stream_read_tree (ib, data_in);
 687   DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
 688 }
 689
 690
 691 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
 692    input block IB.  DATA_IN contains tables and descriptors for the
 693    file being read.  */
 694
 695 static void
 696 lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
 697                                         struct data_in *data_in, tree expr)
 698 {
 699   DECL_SIZE (expr) = stream_read_tree (ib, data_in);
 700   DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
 701   DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
 702
 703   /* Do not stream DECL_ABSTRACT_ORIGIN.  We cannot handle debug information
 704      for early inlining so drop it on the floor instead of ICEing in
 705      dwarf2out.c.  */
 706
 707   if ((TREE_CODE (expr) == VAR_DECL
 708        || TREE_CODE (expr) == PARM_DECL)
 709       && DECL_HAS_VALUE_EXPR_P (expr))
 710     SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
 711
 712   if (TREE_CODE (expr) == VAR_DECL)
 713     {
 714       tree dexpr = stream_read_tree (ib, data_in);
 715       if (dexpr)
 716         SET_DECL_DEBUG_EXPR (expr, dexpr);
 717     }
 718 }
 719
 720
 721 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
 722    EXPR from input block IB.  DATA_IN contains tables and descriptors for the
 723    file being read.  */
 724
 725 static void
 726 lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
 727                                             struct data_in *data_in, tree expr)
 728 {
 729   if (TREE_CODE (expr) == TYPE_DECL)
 730     DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
 731   DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
 732 }
 733
 734
 735 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 736    from input block IB.  DATA_IN contains tables and descriptors for the
 737    file being read.  */
 738
 739 static void
 740 lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
 741                                           struct data_in *data_in, tree expr)
 742 {
 743   tree id;
 744
 745   id = stream_read_tree (ib, data_in);
 746   if (id)
 747     {
 748       gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
 749       SET_DECL_ASSEMBLER_NAME (expr, id);
 750     }
 751
 752   DECL_SECTION_NAME (expr) = stream_read_tree (ib, data_in);
 753   DECL_COMDAT_GROUP (expr) = stream_read_tree (ib, data_in);
 754 }
 755
 756
 757 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
 758    input block IB.  DATA_IN contains tables and descriptors for the
 759    file being read.  */
 760
 761 static void
 762 lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
 763                                        struct data_in *data_in, tree expr)
 764 {
 765   DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
 766   DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
 767   DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
 768   DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
 769   DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
 770 }
 771
 772
 773 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 774    from input block IB.  DATA_IN contains tables and descriptors for the
 775    file being read.  */
 776
 777 static void
 778 lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
 779                                           struct data_in *data_in, tree expr)
 780 {
 781   /* DECL_STRUCT_FUNCTION is handled by lto_input_function.  FIXME lto,
 782      maybe it should be handled here?  */
 783   DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
 784   /* DECL_FUNCTION_SPECIFIC_TARGET is regenerated from attributes.  */
 785   DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
 786
 787   /* If the file contains a function with an EH personality set,
 788      then it was compiled with -fexceptions.  In that case, initialize
 789      the backend EH machinery.  */
 790   if (DECL_FUNCTION_PERSONALITY (expr))
 791     lto_init_eh ();
 792 }
 793
 794
 795 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
 796    input block IB.  DATA_IN contains tables and descriptors for the file
 797    being read.  */
 798
 799 static void
 800 lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
 801                                         struct data_in *data_in, tree expr)
 802 {
 803   TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
 804   TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
 805   TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
 806   TYPE_NAME (expr) = stream_read_tree (ib, data_in);
 807   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 808      reconstructed during fixup.  */
 809   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 810      during fixup.  */
 811   TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
 812   TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
 813   /* TYPE_CANONICAL gets re-computed during type merging.  */
 814   TYPE_CANONICAL (expr) = NULL_TREE;
 815   TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
 816 }
 817
 818 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 819    from input block IB.  DATA_IN contains tables and descriptors for the
 820    file being read.  */
 821
 822 static void
 823 lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
 824                                             struct data_in *data_in,
 825                                             tree expr)
 826 {
 827   if (TREE_CODE (expr) == ENUMERAL_TYPE)
 828     TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
 829   else if (TREE_CODE (expr) == ARRAY_TYPE)
 830     TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
 831   else if (RECORD_OR_UNION_TYPE_P (expr))
 832     TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
 833   else if (TREE_CODE (expr) == FUNCTION_TYPE
 834            || TREE_CODE (expr) == METHOD_TYPE)
 835     TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
 836
 837   if (!POINTER_TYPE_P (expr))
 838     TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
 839   TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
 840   if (RECORD_OR_UNION_TYPE_P (expr))
 841     TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
 842 }
 843
 844
 845 /* Read all pointer fields in the TS_LIST structure of EXPR from input
 846    block IB.  DATA_IN contains tables and descriptors for the
 847    file being read.  */
 848
 849 static void
 850 lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
 851                                  struct data_in *data_in, tree expr)
 852 {
 853   TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
 854   TREE_VALUE (expr) = stream_read_tree (ib, data_in);
 855   TREE_CHAIN (expr) = stream_read_tree (ib, data_in);
 856 }
 857
 858
 859 /* Read all pointer fields in the TS_VEC structure of EXPR from input
 860    block IB.  DATA_IN contains tables and descriptors for the
 861    file being read.  */
 862
 863 static void
 864 lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
 865                                 struct data_in *data_in, tree expr)
 866 {
 867   int i;
 868
 869   /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
 870      instantiate EXPR.  */
 871   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 872     TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
 873 }
 874
 875
 876 /* Read all pointer fields in the TS_EXP structure of EXPR from input
 877    block IB.  DATA_IN contains tables and descriptors for the
 878    file being read.  */
 879
 880
 881 static void
 882 lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
 883                                 struct data_in *data_in, tree expr)
 884 {
 885   int i;
 886
 887   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 888     TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
 889
 890   TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
 891 }
 892
 893
 894 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
 895    block IB.  DATA_IN contains tables and descriptors for the
 896    file being read.  */
 897
 898 static void
 899 lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
 900                                   struct data_in *data_in, tree expr)
 901 {
 902   BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
 903
 904   BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
 905
 906   /* Stream BLOCK_ABSTRACT_ORIGIN and BLOCK_SOURCE_LOCATION for
 907      the limited cases we can handle - those that represent inlined
 908      function scopes.  For the rest them on the floor instead of ICEing in
 909      dwarf2out.c.  */
 910   BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree (ib, data_in);
 911   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 912      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 913      dwarf2out.c.  */
 914
 915   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 916      streaming time.  */
 917
 918   /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
 919      of streaming it.  For non-BLOCK BLOCK_SUPERCONTEXTs we still
 920      stream the child relationship explicitly.  */
 921   if (BLOCK_SUPERCONTEXT (expr)
 922       && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
 923     {
 924       BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
 925       BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
 926     }
 927
 928   /* The global block is rooted at the TU decl.  Hook it here to
 929      avoid the need to stream in this block during WPA time.  */
 930   else if (BLOCK_SUPERCONTEXT (expr)
 931            && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
 932     DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
 933
 934   /* The function-level block is connected at the time we read in
 935      function bodies for the same reason.  */
 936 }
 937
 938
 939 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
 940    block IB.  DATA_IN contains tables and descriptors for the
 941    file being read.  */
 942
 943 static void
 944 lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
 945                                   struct data_in *data_in, tree expr)
 946 {
 947   unsigned i;
 948   tree t;
 949
 950   /* Note that the number of slots in EXPR was read in
 951      streamer_alloc_tree when instantiating EXPR.  However, the
 952      vector is empty so we cannot rely on vec::length to know how many
 953      elements to read.  So, this list is emitted as a 0-terminated
 954      list on the writer side.  */
 955   do
 956     {
 957       t = stream_read_tree (ib, data_in);
 958       if (t)
 959         BINFO_BASE_BINFOS (expr)->quick_push (t);
 960     }
 961   while (t);
 962
 963   BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
 964   BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
 965   BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
 966
 967   /* The vector of BINFO_BASE_ACCESSES is pre-allocated during
 968      unpacking the bitfield section.  */
 969   for (i = 0; i < vec_safe_length (BINFO_BASE_ACCESSES (expr)); i++)
 970     {
 971       tree a = stream_read_tree (ib, data_in);
 972       (*BINFO_BASE_ACCESSES (expr))[i] = a;
 973     }
 974   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX
 975      and BINFO_VPTR_INDEX; these are used by C++ FE only.  */
 976 }
 977
 978
 979 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
 980    input block IB.  DATA_IN contains tables and descriptors for the
 981    file being read.  */
 982
 983 static void
 984 lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
 985                                         struct data_in *data_in, tree expr)
 986 {
 987   unsigned i;
 988
 989   for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
 990     {
 991       constructor_elt e;
 992       e.index = stream_read_tree (ib, data_in);
 993       e.value = stream_read_tree (ib, data_in);
 994       (*CONSTRUCTOR_ELTS (expr))[i] = e;
 995     }
 996 }
 997
 998
 999 /* Read all pointer fields in the TS_OMP_CLAUSE structure of EXPR from
1000    input block IB.  DATA_IN contains tables and descriptors for the
1001    file being read.  */
1002
1003 static void
1004 lto_input_ts_omp_clause_tree_pointers (struct lto_input_block *ib,
1005                                        struct data_in *data_in, tree expr)
1006 {
1007   int i;
1008
1009   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
1010     OMP_CLAUSE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
1011   OMP_CLAUSE_CHAIN (expr) = stream_read_tree (ib, data_in);
1012 }
1013
1014
1015 /* Read all pointer fields in EXPR from input block IB.  DATA_IN
1016    contains tables and descriptors for the file being read.  */
1017
1018 void
1019 streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
1020                          tree expr)
1021 {
1022   enum tree_code code;
1023
1024   code = TREE_CODE (expr);
1025
1026   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
1027     lto_input_ts_common_tree_pointers (ib, data_in, expr);
1028
1029   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1030     lto_input_ts_vector_tree_pointers (ib, data_in, expr);
1031
1032   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1033     lto_input_ts_complex_tree_pointers (ib, data_in, expr);
1034
1035   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1036     lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
1037
1038   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1039     lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
1040
1041   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1042     lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
1043
1044   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1045     lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
1046
1047   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1048     lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
1049
1050   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1051     lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1052
1053   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1054     lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1055
1056   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1057     lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1058
1059   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1060     lto_input_ts_list_tree_pointers (ib, data_in, expr);
1061
1062   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1063     lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1064
1065   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1066     lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1067
1068   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1069     lto_input_ts_block_tree_pointers (ib, data_in, expr);
1070
1071   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1072     lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1073
1074   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1075     lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1076
1077   if (code == OMP_CLAUSE)
1078     lto_input_ts_omp_clause_tree_pointers (ib, data_in, expr);
1079 }
1080
1081
1082 /* Read an index IX from input block IB and return the tree node at
1083    DATA_IN->FILE_DATA->GLOBALS_INDEX[IX].  */
1084
1085 tree
1086 streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1087 {
1088   unsigned HOST_WIDE_INT ix;
1089   tree result;
1090   enum LTO_tags expected_tag;
1091
1092   ix = streamer_read_uhwi (ib);
1093   expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1094
1095   result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1096   gcc_assert (result
1097               && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1098
1099   return result;
1100 }
1101
1102
1103 /* Read a code and class from input block IB and return the
1104    corresponding builtin.  DATA_IN is as in stream_read_tree.  */
1105
1106 tree
1107 streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1108 {
1109   enum built_in_class fclass;
1110   enum built_in_function fcode;
1111   const char *asmname;
1112   tree result;
1113
1114   fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1115   gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1116
1117   fcode = (enum built_in_function) streamer_read_uhwi (ib);
1118
1119   if (fclass == BUILT_IN_NORMAL)
1120     {
1121       if (fcode >= END_BUILTINS)
1122         fatal_error ("machine independent builtin code out of range");
1123       result = builtin_decl_explicit (fcode);
1124       gcc_assert (result);
1125     }
1126   else if (fclass == BUILT_IN_MD)
1127     {
1128       result = targetm.builtin_decl (fcode, true);
1129       if (!result || result == error_mark_node)
1130         fatal_error ("target specific builtin not available");
1131     }
1132   else
1133     gcc_unreachable ();
1134
1135   asmname = streamer_read_string (data_in, ib);
1136   if (asmname)
1137     set_builtin_user_assembler_name (result, asmname);
1138
1139   streamer_tree_cache_append (data_in->reader_cache, result, 0);
1140
1141   return result;
1142 }