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 #include "builtins.h"
  39
  40 /* Read a STRING_CST from the string table in DATA_IN using input
  41    block IB.  */
  42
  43 tree
  44 streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib)
  45 {
  46   unsigned int len;
  47   const char * ptr;
  48
  49   ptr = streamer_read_indexed_string (data_in, ib, &len);
  50   if (!ptr)
  51     return NULL;
  52   return build_string (len, ptr);
  53 }
  54
  55
  56 /* Read an IDENTIFIER from the string table in DATA_IN using input
  57    block IB.  */
  58
  59 static tree
  60 input_identifier (struct data_in *data_in, struct lto_input_block *ib)
  61 {
  62   unsigned int len;
  63   const char *ptr;
  64
  65   ptr = streamer_read_indexed_string (data_in, ib, &len);
  66   if (!ptr)
  67     return NULL;
  68   return get_identifier_with_length (ptr, len);
  69 }
  70
  71
  72 /* Read a chain of tree nodes from input block IB. DATA_IN contains
  73    tables and descriptors for the file being read.  */
  74
  75 tree
  76 streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in)
  77 {
  78   tree first, prev, curr;
  79
  80   /* The chain is written as NULL terminated list of trees.  */
  81   first = prev = NULL_TREE;
  82   do
  83     {
  84       curr = stream_read_tree (ib, data_in);
  85       if (prev)
  86         TREE_CHAIN (prev) = curr;
  87       else
  88         first = curr;
  89
  90       prev = curr;
  91     }
  92   while (curr);
  93
  94   return first;
  95 }
  96
  97
  98 /* Unpack all the non-pointer fields of the TS_BASE structure of
  99    expression EXPR from bitpack BP.  */
 100
 101 static void
 102 unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
 103 {
 104   /* Note that the code for EXPR has already been unpacked to create EXPR in
 105      streamer_alloc_tree.  */
 106   if (!TYPE_P (expr))
 107     {
 108       TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1);
 109       TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1);
 110       TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 111
 112       /* TREE_PUBLIC is used on types to indicate that the type
 113          has a TYPE_CACHED_VALUES vector.  This is not streamed out,
 114          so we skip it here.  */
 115       TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1);
 116     }
 117   else
 118     bp_unpack_value (bp, 4);
 119   TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 120   TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1);
 121   if (DECL_P (expr))
 122     DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
 123   else if (TYPE_P (expr))
 124     TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
 125   else
 126     bp_unpack_value (bp, 1);
 127   TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
 128   if (TYPE_P (expr))
 129     TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 130   else
 131     TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
 132   TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
 133   TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
 134   if (TREE_CODE (expr) != TREE_BINFO)
 135     TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
 136   TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
 137   TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
 138   if (TYPE_P (expr))
 139     {
 140       TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
 141       TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
 142     }
 143   else if (TREE_CODE (expr) == SSA_NAME)
 144     SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
 145   else
 146     bp_unpack_value (bp, 1);
 147 }
 148
 149
 150 /* Unpack all the non-pointer fields of the TS_INT_CST structure of
 151    expression EXPR from bitpack BP.  */
 152
 153 static void
 154 unpack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
 155 {
 156   int i;
 157   for (i = 0; i < TREE_INT_CST_EXT_NUNITS (expr); i++)
 158     TREE_INT_CST_ELT (expr, i) = bp_unpack_var_len_int (bp);
 159 }
 160
 161
 162 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of
 163    expression EXPR from bitpack BP.  */
 164
 165 static void
 166 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
 167 {
 168   unsigned i;
 169   REAL_VALUE_TYPE r;
 170   REAL_VALUE_TYPE *rp;
 171
 172   /* Clear all bits of the real value type so that we can later do
 173      bitwise comparisons to see if two values are the same.  */
 174   memset (&r, 0, sizeof r);
 175   r.cl = (unsigned) bp_unpack_value (bp, 2);
 176   r.decimal = (unsigned) bp_unpack_value (bp, 1);
 177   r.sign = (unsigned) bp_unpack_value (bp, 1);
 178   r.signalling = (unsigned) bp_unpack_value (bp, 1);
 179   r.canonical = (unsigned) bp_unpack_value (bp, 1);
 180   r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
 181   for (i = 0; i < SIGSZ; i++)
 182     r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
 183
 184   rp = ggc_alloc<real_value> ();
 185   memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
 186   TREE_REAL_CST_PTR (expr) = rp;
 187 }
 188
 189
 190 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
 191    expression EXPR from bitpack BP.  */
 192
 193 static void
 194 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 195 {
 196   FIXED_VALUE_TYPE *fp = ggc_alloc<fixed_value> ();
 197   fp->mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
 198   fp->data.low = bp_unpack_var_len_int (bp);
 199   fp->data.high = bp_unpack_var_len_int (bp);
 200   TREE_FIXED_CST_PTR (expr) = fp;
 201 }
 202
 203 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
 204    of expression EXPR from bitpack BP.  */
 205
 206 static void
 207 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 208 {
 209   DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
 210   DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 211   DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 212   DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 213   DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
 214   DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 215   DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 216   DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 217   DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 218   DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 219   DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
 220
 221   if (TREE_CODE (expr) == LABEL_DECL)
 222     {
 223       EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
 224
 225       /* Always assume an initial value of -1 for LABEL_DECL_UID to
 226          force gimple_set_bb to recreate label_to_block_map.  */
 227       LABEL_DECL_UID (expr) = -1;
 228     }
 229
 230   if (TREE_CODE (expr) == FIELD_DECL)
 231     {
 232       DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 233       DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 234       expr->decl_common.off_align = bp_unpack_value (bp, 8);
 235     }
 236
 237   if (TREE_CODE (expr) == VAR_DECL)
 238     {
 239       DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 240       DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
 241     }
 242
 243   if (TREE_CODE (expr) == RESULT_DECL
 244       || TREE_CODE (expr) == PARM_DECL
 245       || TREE_CODE (expr) == VAR_DECL)
 246     {
 247       DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
 248       if (TREE_CODE (expr) == VAR_DECL
 249           || TREE_CODE (expr) == PARM_DECL)
 250         DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 251     }
 252 }
 253
 254
 255 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
 256    of expression EXPR from bitpack BP.  */
 257
 258 static void
 259 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 260 {
 261   DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 262 }
 263
 264
 265 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 266    of expression EXPR from bitpack BP.  */
 267
 268 static void
 269 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 270 {
 271   DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
 272   DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 273   DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
 274   DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp,  1);
 275   DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp,  1);
 276   DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp,  2);
 277   DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp,  1);
 278
 279   if (TREE_CODE (expr) == VAR_DECL)
 280     {
 281       DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 282       DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
 283       DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp,  3);
 284     }
 285
 286   if (TREE_CODE (expr) == FUNCTION_DECL)
 287     {
 288       DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 289       DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 290       DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 291     }
 292   if (VAR_OR_FUNCTION_DECL_P (expr))
 293     {
 294       priority_type p;
 295       p = (priority_type) bp_unpack_var_len_unsigned (bp);
 296       SET_DECL_INIT_PRIORITY (expr, p);
 297     }
 298 }
 299
 300
 301 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
 302    of expression EXPR from bitpack BP.  */
 303
 304 static void
 305 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 306 {
 307   DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
 308                                                BUILT_IN_LAST);
 309   DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 310   DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 311   DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 312   DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
 313   DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
 314   DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
 315   DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
 316   DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
 317   DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 318   DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
 319   DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 320   DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
 321                         = (unsigned) bp_unpack_value (bp, 1);
 322   DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
 323   DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
 324   DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 325   DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 326   if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
 327     {
 328       DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
 329                                                                             11);
 330       if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
 331           && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
 332         fatal_error ("machine independent builtin code out of range");
 333       else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
 334         {
 335           tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
 336           if (!result || result == error_mark_node)
 337             fatal_error ("target specific builtin not available");
 338         }
 339     }
 340   if (DECL_STATIC_DESTRUCTOR (expr))
 341     {
 342       priority_type p;
 343       p = (priority_type) bp_unpack_var_len_unsigned (bp);
 344       SET_DECL_FINI_PRIORITY (expr, p);
 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   enum 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 /* Unpack a TS_OPTIMIZATION tree from BP into EXPR.  */
 403
 404 static void
 405 unpack_ts_optimization (struct bitpack_d *bp, tree expr)
 406 {
 407   unsigned i, len;
 408   struct cl_optimization *t = TREE_OPTIMIZATION (expr);
 409
 410   len = sizeof (struct cl_optimization);
 411   for (i = 0; i < len; i++)
 412     ((unsigned char *)t)[i] = bp_unpack_value (bp, 8);
 413   if (bp_unpack_value (bp, 32) != 0x12345678)
 414     fatal_error ("cl_optimization size mismatch in LTO reader and writer");
 415 }
 416
 417
 418 /* Unpack all the non-pointer fields of the TS_OMP_CLAUSE
 419    structure of expression EXPR from bitpack BP.  */
 420
 421 static void
 422 unpack_ts_omp_clause_value_fields (struct data_in *data_in,
 423                                    struct bitpack_d *bp, tree expr)
 424 {
 425   OMP_CLAUSE_LOCATION (expr) = stream_input_location (bp, data_in);
 426   switch (OMP_CLAUSE_CODE (expr))
 427     {
 428     case OMP_CLAUSE_DEFAULT:
 429       OMP_CLAUSE_DEFAULT_KIND (expr)
 430         = bp_unpack_enum (bp, omp_clause_default_kind,
 431                           OMP_CLAUSE_DEFAULT_LAST);
 432       break;
 433     case OMP_CLAUSE_SCHEDULE:
 434       OMP_CLAUSE_SCHEDULE_KIND (expr)
 435         = bp_unpack_enum (bp, omp_clause_schedule_kind,
 436                           OMP_CLAUSE_SCHEDULE_LAST);
 437       break;
 438     case OMP_CLAUSE_DEPEND:
 439       OMP_CLAUSE_DEPEND_KIND (expr)
 440         = bp_unpack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST);
 441       break;
 442     case OMP_CLAUSE_MAP:
 443       OMP_CLAUSE_MAP_KIND (expr)
 444         = bp_unpack_enum (bp, omp_clause_map_kind, OMP_CLAUSE_MAP_LAST);
 445       break;
 446     case OMP_CLAUSE_PROC_BIND:
 447       OMP_CLAUSE_PROC_BIND_KIND (expr)
 448         = bp_unpack_enum (bp, omp_clause_proc_bind_kind,
 449                           OMP_CLAUSE_PROC_BIND_LAST);
 450       break;
 451     case OMP_CLAUSE_REDUCTION:
 452       OMP_CLAUSE_REDUCTION_CODE (expr)
 453         = bp_unpack_enum (bp, tree_code, MAX_TREE_CODES);
 454       break;
 455     default:
 456       break;
 457     }
 458 }
 459
 460 /* Unpack all the non-pointer fields in EXPR into a bit pack.  */
 461
 462 static void
 463 unpack_value_fields (struct data_in *data_in, struct bitpack_d *bp, tree expr)
 464 {
 465   enum tree_code code;
 466
 467   code = TREE_CODE (expr);
 468
 469   /* Note that all these functions are highly sensitive to changes in
 470      the types and sizes of each of the fields being packed.  */
 471   unpack_ts_base_value_fields (bp, expr);
 472
 473   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 474     unpack_ts_int_cst_value_fields (bp, expr);
 475
 476   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 477     unpack_ts_real_cst_value_fields (bp, expr);
 478
 479   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 480     unpack_ts_fixed_cst_value_fields (bp, expr);
 481
 482   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 483     DECL_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
 484
 485   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 486     unpack_ts_decl_common_value_fields (bp, expr);
 487
 488   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 489     unpack_ts_decl_wrtl_value_fields (bp, expr);
 490
 491   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 492     unpack_ts_decl_with_vis_value_fields (bp, expr);
 493
 494   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 495     unpack_ts_function_decl_value_fields (bp, expr);
 496
 497   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 498     unpack_ts_type_common_value_fields (bp, expr);
 499
 500   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 501     SET_EXPR_LOCATION (expr, stream_input_location (bp, data_in));
 502
 503   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 504     unpack_ts_block_value_fields (data_in, bp, expr);
 505
 506   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 507     unpack_ts_translation_unit_decl_value_fields (data_in, bp, expr);
 508
 509   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
 510     gcc_unreachable ();
 511
 512   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 513     unpack_ts_optimization (bp, expr);
 514
 515   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 516     {
 517       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
 518       if (length > 0)
 519         vec_safe_grow (BINFO_BASE_ACCESSES (expr), length);
 520     }
 521
 522   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 523     {
 524       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
 525       if (length > 0)
 526         vec_safe_grow (CONSTRUCTOR_ELTS (expr), length);
 527     }
 528
 529   if (code == OMP_CLAUSE)
 530     unpack_ts_omp_clause_value_fields (data_in, bp, expr);
 531 }
 532
 533
 534 /* Read all the language-independent bitfield values for EXPR from IB.
 535    Return the partially unpacked bitpack so the caller can unpack any other
 536    bitfield values that the writer may have written.  */
 537
 538 struct bitpack_d
 539 streamer_read_tree_bitfields (struct lto_input_block *ib,
 540                               struct data_in *data_in, tree expr)
 541 {
 542   enum tree_code code;
 543   struct bitpack_d bp;
 544
 545   /* Read the bitpack of non-pointer values from IB.  */
 546   bp = streamer_read_bitpack (ib);
 547
 548   /* The first word in BP contains the code of the tree that we
 549      are about to read.  */
 550   code = (enum tree_code) bp_unpack_value (&bp, 16);
 551   lto_tag_check (lto_tree_code_to_tag (code),
 552                  lto_tree_code_to_tag (TREE_CODE (expr)));
 553
 554   /* Unpack all the value fields from BP.  */
 555   unpack_value_fields (data_in, &bp, expr);
 556
 557   return bp;
 558 }
 559
 560
 561 /* Materialize a new tree from input block IB using descriptors in
 562    DATA_IN.  The code for the new tree should match TAG.  Store in
 563    *IX_P the index into the reader cache where the new tree is stored.  */
 564
 565 tree
 566 streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
 567                      enum LTO_tags tag)
 568 {
 569   enum tree_code code;
 570   tree result;
 571 #ifdef LTO_STREAMER_DEBUG
 572   HOST_WIDE_INT orig_address_in_writer;
 573 #endif
 574
 575   result = NULL_TREE;
 576
 577 #ifdef LTO_STREAMER_DEBUG
 578   /* Read the word representing the memory address for the tree
 579      as it was written by the writer.  This is useful when
 580      debugging differences between the writer and reader.  */
 581   orig_address_in_writer = streamer_read_hwi (ib);
 582   gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
 583 #endif
 584
 585   code = lto_tag_to_tree_code (tag);
 586
 587   /* We should never see an SSA_NAME tree.  Only the version numbers of
 588      SSA names are ever written out.  See input_ssa_names.  */
 589   gcc_assert (code != SSA_NAME);
 590
 591   /* Instantiate a new tree using the header data.  */
 592   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
 593     result = streamer_read_string_cst (data_in, ib);
 594   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
 595     result = input_identifier (data_in, ib);
 596   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 597     {
 598       HOST_WIDE_INT len = streamer_read_hwi (ib);
 599       result = make_tree_vec (len);
 600     }
 601   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 602     {
 603       HOST_WIDE_INT len = streamer_read_hwi (ib);
 604       result = make_vector (len);
 605     }
 606   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 607     {
 608       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 609       result = make_tree_binfo (len);
 610     }
 611   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 612     {
 613       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 614       unsigned HOST_WIDE_INT ext_len = streamer_read_uhwi (ib);
 615       result = make_int_cst (len, ext_len);
 616     }
 617   else if (code == CALL_EXPR)
 618     {
 619       unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
 620       return build_vl_exp (CALL_EXPR, nargs + 3);
 621     }
 622   else if (code == OMP_CLAUSE)
 623     {
 624       enum omp_clause_code subcode
 625         = (enum omp_clause_code) streamer_read_uhwi (ib);
 626       return build_omp_clause (UNKNOWN_LOCATION, subcode);
 627     }
 628   else
 629     {
 630       /* For all other nodes, materialize the tree with a raw
 631          make_node call.  */
 632       result = make_node (code);
 633     }
 634
 635 #ifdef LTO_STREAMER_DEBUG
 636   /* Store the original address of the tree as seen by the writer
 637      in RESULT's aux field.  This is useful when debugging streaming
 638      problems.  This way, a debugging session can be started on
 639      both writer and reader with a breakpoint using this address
 640      value in both.  */
 641   lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
 642 #endif
 643
 644   return result;
 645 }
 646
 647
 648 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
 649    block IB.  DATA_IN contains tables and descriptors for the
 650    file being read.  */
 651
 652
 653 static void
 654 lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
 655                                    struct data_in *data_in, tree expr)
 656 {
 657   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 658     TREE_TYPE (expr) = stream_read_tree (ib, data_in);
 659 }
 660
 661
 662 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
 663    block IB.  DATA_IN contains tables and descriptors for the
 664    file being read.  */
 665
 666 static void
 667 lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
 668                                    struct data_in *data_in, tree expr)
 669 {
 670   unsigned i;
 671   for (i = 0; i < VECTOR_CST_NELTS (expr); ++i)
 672     VECTOR_CST_ELT (expr, i) = stream_read_tree (ib, data_in);
 673 }
 674
 675
 676 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
 677    block IB.  DATA_IN contains tables and descriptors for the
 678    file being read.  */
 679
 680 static void
 681 lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
 682                                     struct data_in *data_in, tree expr)
 683 {
 684   TREE_REALPART (expr) = stream_read_tree (ib, data_in);
 685   TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
 686 }
 687
 688
 689 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 690    from input block IB.  DATA_IN contains tables and descriptors for the
 691    file being read.  */
 692
 693 static void
 694 lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
 695                                          struct data_in *data_in, tree expr)
 696 {
 697   DECL_NAME (expr) = stream_read_tree (ib, data_in);
 698   DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
 699 }
 700
 701
 702 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
 703    input block IB.  DATA_IN contains tables and descriptors for the
 704    file being read.  */
 705
 706 static void
 707 lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
 708                                         struct data_in *data_in, tree expr)
 709 {
 710   DECL_SIZE (expr) = stream_read_tree (ib, data_in);
 711   DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
 712   DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
 713
 714   /* Do not stream DECL_ABSTRACT_ORIGIN.  We cannot handle debug information
 715      for early inlining so drop it on the floor instead of ICEing in
 716      dwarf2out.c.  */
 717
 718   if ((TREE_CODE (expr) == VAR_DECL
 719        || TREE_CODE (expr) == PARM_DECL)
 720       && DECL_HAS_VALUE_EXPR_P (expr))
 721     SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
 722
 723   if (TREE_CODE (expr) == VAR_DECL)
 724     {
 725       tree dexpr = stream_read_tree (ib, data_in);
 726       if (dexpr)
 727         SET_DECL_DEBUG_EXPR (expr, dexpr);
 728     }
 729 }
 730
 731
 732 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
 733    EXPR from input block IB.  DATA_IN contains tables and descriptors for the
 734    file being read.  */
 735
 736 static void
 737 lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
 738                                             struct data_in *data_in, tree expr)
 739 {
 740   if (TREE_CODE (expr) == TYPE_DECL)
 741     DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
 742   DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
 743 }
 744
 745
 746 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 747    from input block IB.  DATA_IN contains tables and descriptors for the
 748    file being read.  */
 749
 750 static void
 751 lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
 752                                           struct data_in *data_in, tree expr)
 753 {
 754   tree id;
 755
 756   id = stream_read_tree (ib, data_in);
 757   if (id)
 758     {
 759       gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
 760       SET_DECL_ASSEMBLER_NAME (expr, id);
 761     }
 762 }
 763
 764
 765 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
 766    input block IB.  DATA_IN contains tables and descriptors for the
 767    file being read.  */
 768
 769 static void
 770 lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
 771                                        struct data_in *data_in, tree expr)
 772 {
 773   DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
 774   DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
 775   DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
 776   DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
 777   DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
 778 }
 779
 780
 781 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 782    from input block IB.  DATA_IN contains tables and descriptors for the
 783    file being read.  */
 784
 785 static void
 786 lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
 787                                           struct data_in *data_in, tree expr)
 788 {
 789   /* DECL_STRUCT_FUNCTION is handled by lto_input_function.  FIXME lto,
 790      maybe it should be handled here?  */
 791   DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
 792   /* DECL_FUNCTION_SPECIFIC_TARGET is regenerated from attributes.  */
 793   DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
 794
 795   /* If the file contains a function with an EH personality set,
 796      then it was compiled with -fexceptions.  In that case, initialize
 797      the backend EH machinery.  */
 798   if (DECL_FUNCTION_PERSONALITY (expr))
 799     lto_init_eh ();
 800 }
 801
 802
 803 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
 804    input block IB.  DATA_IN contains tables and descriptors for the file
 805    being read.  */
 806
 807 static void
 808 lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
 809                                         struct data_in *data_in, tree expr)
 810 {
 811   TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
 812   TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
 813   TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
 814   TYPE_NAME (expr) = stream_read_tree (ib, data_in);
 815   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 816      reconstructed during fixup.  */
 817   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 818      during fixup.  */
 819   TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
 820   TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
 821   /* TYPE_CANONICAL gets re-computed during type merging.  */
 822   TYPE_CANONICAL (expr) = NULL_TREE;
 823   TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
 824 }
 825
 826 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 827    from input block IB.  DATA_IN contains tables and descriptors for the
 828    file being read.  */
 829
 830 static void
 831 lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
 832                                             struct data_in *data_in,
 833                                             tree expr)
 834 {
 835   if (TREE_CODE (expr) == ENUMERAL_TYPE)
 836     TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
 837   else if (TREE_CODE (expr) == ARRAY_TYPE)
 838     TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
 839   else if (RECORD_OR_UNION_TYPE_P (expr))
 840     TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
 841   else if (TREE_CODE (expr) == FUNCTION_TYPE
 842            || TREE_CODE (expr) == METHOD_TYPE)
 843     TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
 844
 845   if (!POINTER_TYPE_P (expr))
 846     TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
 847   TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
 848   if (RECORD_OR_UNION_TYPE_P (expr))
 849     TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
 850 }
 851
 852
 853 /* Read all pointer fields in the TS_LIST structure of EXPR from input
 854    block IB.  DATA_IN contains tables and descriptors for the
 855    file being read.  */
 856
 857 static void
 858 lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
 859                                  struct data_in *data_in, tree expr)
 860 {
 861   TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
 862   TREE_VALUE (expr) = stream_read_tree (ib, data_in);
 863   TREE_CHAIN (expr) = stream_read_tree (ib, data_in);
 864 }
 865
 866
 867 /* Read all pointer fields in the TS_VEC structure of EXPR from input
 868    block IB.  DATA_IN contains tables and descriptors for the
 869    file being read.  */
 870
 871 static void
 872 lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
 873                                 struct data_in *data_in, tree expr)
 874 {
 875   int i;
 876
 877   /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
 878      instantiate EXPR.  */
 879   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 880     TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
 881 }
 882
 883
 884 /* Read all pointer fields in the TS_EXP structure of EXPR from input
 885    block IB.  DATA_IN contains tables and descriptors for the
 886    file being read.  */
 887
 888
 889 static void
 890 lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
 891                                 struct data_in *data_in, tree expr)
 892 {
 893   int i;
 894
 895   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 896     TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
 897
 898   TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
 899 }
 900
 901
 902 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
 903    block IB.  DATA_IN contains tables and descriptors for the
 904    file being read.  */
 905
 906 static void
 907 lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
 908                                   struct data_in *data_in, tree expr)
 909 {
 910   BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
 911
 912   BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
 913
 914   /* Stream BLOCK_ABSTRACT_ORIGIN and BLOCK_SOURCE_LOCATION for
 915      the limited cases we can handle - those that represent inlined
 916      function scopes.  For the rest them on the floor instead of ICEing in
 917      dwarf2out.c.  */
 918   BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree (ib, data_in);
 919   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 920      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 921      dwarf2out.c.  */
 922
 923   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 924      streaming time.  */
 925
 926   /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
 927      of streaming it.  For non-BLOCK BLOCK_SUPERCONTEXTs we still
 928      stream the child relationship explicitly.  */
 929   if (BLOCK_SUPERCONTEXT (expr)
 930       && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
 931     {
 932       BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
 933       BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
 934     }
 935
 936   /* The global block is rooted at the TU decl.  Hook it here to
 937      avoid the need to stream in this block during WPA time.  */
 938   else if (BLOCK_SUPERCONTEXT (expr)
 939            && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
 940     DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
 941
 942   /* The function-level block is connected at the time we read in
 943      function bodies for the same reason.  */
 944 }
 945
 946
 947 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
 948    block IB.  DATA_IN contains tables and descriptors for the
 949    file being read.  */
 950
 951 static void
 952 lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
 953                                   struct data_in *data_in, tree expr)
 954 {
 955   unsigned i;
 956   tree t;
 957
 958   /* Note that the number of slots in EXPR was read in
 959      streamer_alloc_tree when instantiating EXPR.  However, the
 960      vector is empty so we cannot rely on vec::length to know how many
 961      elements to read.  So, this list is emitted as a 0-terminated
 962      list on the writer side.  */
 963   do
 964     {
 965       t = stream_read_tree (ib, data_in);
 966       if (t)
 967         BINFO_BASE_BINFOS (expr)->quick_push (t);
 968     }
 969   while (t);
 970
 971   BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
 972   BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
 973   BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
 974
 975   /* The vector of BINFO_BASE_ACCESSES is pre-allocated during
 976      unpacking the bitfield section.  */
 977   for (i = 0; i < vec_safe_length (BINFO_BASE_ACCESSES (expr)); i++)
 978     {
 979       tree a = stream_read_tree (ib, data_in);
 980       (*BINFO_BASE_ACCESSES (expr))[i] = a;
 981     }
 982   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX
 983      and BINFO_VPTR_INDEX; these are used by C++ FE only.  */
 984 }
 985
 986
 987 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
 988    input block IB.  DATA_IN contains tables and descriptors for the
 989    file being read.  */
 990
 991 static void
 992 lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
 993                                         struct data_in *data_in, tree expr)
 994 {
 995   unsigned i;
 996
 997   for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
 998     {
 999       constructor_elt e;
1000       e.index = stream_read_tree (ib, data_in);
1001       e.value = stream_read_tree (ib, data_in);
1002       (*CONSTRUCTOR_ELTS (expr))[i] = e;
1003     }
1004 }
1005
1006
1007 /* Read all pointer fields in the TS_OMP_CLAUSE structure of EXPR from
1008    input block IB.  DATA_IN contains tables and descriptors for the
1009    file being read.  */
1010
1011 static void
1012 lto_input_ts_omp_clause_tree_pointers (struct lto_input_block *ib,
1013                                        struct data_in *data_in, tree expr)
1014 {
1015   int i;
1016
1017   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
1018     OMP_CLAUSE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
1019   OMP_CLAUSE_CHAIN (expr) = stream_read_tree (ib, data_in);
1020 }
1021
1022
1023 /* Read all pointer fields in EXPR from input block IB.  DATA_IN
1024    contains tables and descriptors for the file being read.  */
1025
1026 void
1027 streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
1028                          tree expr)
1029 {
1030   enum tree_code code;
1031
1032   code = TREE_CODE (expr);
1033
1034   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
1035     lto_input_ts_common_tree_pointers (ib, data_in, expr);
1036
1037   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1038     lto_input_ts_vector_tree_pointers (ib, data_in, expr);
1039
1040   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1041     lto_input_ts_complex_tree_pointers (ib, data_in, expr);
1042
1043   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1044     lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
1045
1046   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1047     lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
1048
1049   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1050     lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
1051
1052   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1053     lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
1054
1055   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1056     lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
1057
1058   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1059     lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1060
1061   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1062     lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1063
1064   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1065     lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1066
1067   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1068     lto_input_ts_list_tree_pointers (ib, data_in, expr);
1069
1070   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1071     lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1072
1073   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1074     lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1075
1076   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1077     lto_input_ts_block_tree_pointers (ib, data_in, expr);
1078
1079   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1080     lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1081
1082   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1083     lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1084
1085   if (code == OMP_CLAUSE)
1086     lto_input_ts_omp_clause_tree_pointers (ib, data_in, expr);
1087 }
1088
1089
1090 /* Read an index IX from input block IB and return the tree node at
1091    DATA_IN->FILE_DATA->GLOBALS_INDEX[IX].  */
1092
1093 tree
1094 streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1095 {
1096   unsigned HOST_WIDE_INT ix;
1097   tree result;
1098   enum LTO_tags expected_tag;
1099
1100   ix = streamer_read_uhwi (ib);
1101   expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1102
1103   result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1104   gcc_assert (result
1105               && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1106
1107   return result;
1108 }
1109
1110
1111 /* Read a code and class from input block IB and return the
1112    corresponding builtin.  DATA_IN is as in stream_read_tree.  */
1113
1114 tree
1115 streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1116 {
1117   enum built_in_class fclass;
1118   enum built_in_function fcode;
1119   const char *asmname;
1120   tree result;
1121
1122   fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1123   gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1124
1125   fcode = (enum built_in_function) streamer_read_uhwi (ib);
1126
1127   if (fclass == BUILT_IN_NORMAL)
1128     {
1129       if (fcode >= END_BUILTINS)
1130         fatal_error ("machine independent builtin code out of range");
1131       result = builtin_decl_explicit (fcode);
1132       gcc_assert (result);
1133     }
1134   else if (fclass == BUILT_IN_MD)
1135     {
1136       result = targetm.builtin_decl (fcode, true);
1137       if (!result || result == error_mark_node)
1138         fatal_error ("target specific builtin not available");
1139     }
1140   else
1141     gcc_unreachable ();
1142
1143   asmname = streamer_read_string (data_in, ib);
1144   if (asmname)
1145     set_builtin_user_assembler_name (result, asmname);
1146
1147   streamer_tree_cache_append (data_in->reader_cache, result, 0);
1148
1149   return result;
1150 }