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