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 "tree-streamer.h"
  44 #include "data-streamer.h"
  45 #include "streamer-hooks.h"
  46 #include "lto-streamer.h"
  47 #include "builtins.h"
  48
  49 /* Read a STRING_CST from the string table in DATA_IN using input
  50    block IB.  */
  51
  52 tree
  53 streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib)
  54 {
  55   unsigned int len;
  56   const char * ptr;
  57
  58   ptr = streamer_read_indexed_string (data_in, ib, &len);
  59   if (!ptr)
  60     return NULL;
  61   return build_string (len, ptr);
  62 }
  63
  64
  65 /* Read an IDENTIFIER from the string table in DATA_IN using input
  66    block IB.  */
  67
  68 static tree
  69 input_identifier (struct data_in *data_in, struct lto_input_block *ib)
  70 {
  71   unsigned int len;
  72   const char *ptr;
  73
  74   ptr = streamer_read_indexed_string (data_in, ib, &len);
  75   if (!ptr)
  76     return NULL;
  77   return get_identifier_with_length (ptr, len);
  78 }
  79
  80
  81 /* Read a chain of tree nodes from input block IB. DATA_IN contains
  82    tables and descriptors for the file being read.  */
  83
  84 tree
  85 streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in)
  86 {
  87   tree first, prev, curr;
  88
  89   /* The chain is written as NULL terminated list of trees.  */
  90   first = prev = NULL_TREE;
  91   do
  92     {
  93       curr = stream_read_tree (ib, data_in);
  94       if (prev)
  95         TREE_CHAIN (prev) = curr;
  96       else
  97         first = curr;
  98
  99       prev = curr;
 100     }
 101   while (curr);
 102
 103   return first;
 104 }
 105
 106
 107 /* Unpack all the non-pointer fields of the TS_BASE structure of
 108    expression EXPR from bitpack BP.  */
 109
 110 static void
 111 unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
 112 {
 113   /* Note that the code for EXPR has already been unpacked to create EXPR in
 114      streamer_alloc_tree.  */
 115   if (!TYPE_P (expr))
 116     {
 117       TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1);
 118       TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1);
 119       TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 120
 121       /* TREE_PUBLIC is used on types to indicate that the type
 122          has a TYPE_CACHED_VALUES vector.  This is not streamed out,
 123          so we skip it here.  */
 124       TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1);
 125     }
 126   else
 127     bp_unpack_value (bp, 4);
 128   TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 129   TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1);
 130   if (DECL_P (expr))
 131     DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
 132   else if (TYPE_P (expr))
 133     TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
 134   else
 135     bp_unpack_value (bp, 1);
 136   TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
 137   if (TYPE_P (expr))
 138     TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 139   else
 140     TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
 141   TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
 142   TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
 143   if (TREE_CODE (expr) != TREE_BINFO)
 144     TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
 145   TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
 146   TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
 147   if (TYPE_P (expr))
 148     {
 149       TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
 150       TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
 151     }
 152   else if (TREE_CODE (expr) == SSA_NAME)
 153     SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
 154   else
 155     bp_unpack_value (bp, 1);
 156 }
 157
 158
 159 /* Unpack all the non-pointer fields of the TS_INT_CST structure of
 160    expression EXPR from bitpack BP.  */
 161
 162 static void
 163 unpack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
 164 {
 165   int i;
 166   for (i = 0; i < TREE_INT_CST_EXT_NUNITS (expr); i++)
 167     TREE_INT_CST_ELT (expr, i) = bp_unpack_var_len_int (bp);
 168 }
 169
 170
 171 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of
 172    expression EXPR from bitpack BP.  */
 173
 174 static void
 175 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
 176 {
 177   unsigned i;
 178   REAL_VALUE_TYPE r;
 179   REAL_VALUE_TYPE *rp;
 180
 181   /* Clear all bits of the real value type so that we can later do
 182      bitwise comparisons to see if two values are the same.  */
 183   memset (&r, 0, sizeof r);
 184   r.cl = (unsigned) bp_unpack_value (bp, 2);
 185   r.decimal = (unsigned) bp_unpack_value (bp, 1);
 186   r.sign = (unsigned) bp_unpack_value (bp, 1);
 187   r.signalling = (unsigned) bp_unpack_value (bp, 1);
 188   r.canonical = (unsigned) bp_unpack_value (bp, 1);
 189   r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
 190   for (i = 0; i < SIGSZ; i++)
 191     r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
 192
 193   rp = ggc_alloc<real_value> ();
 194   memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
 195   TREE_REAL_CST_PTR (expr) = rp;
 196 }
 197
 198
 199 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
 200    expression EXPR from bitpack BP.  */
 201
 202 static void
 203 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 204 {
 205   FIXED_VALUE_TYPE *fp = ggc_alloc<fixed_value> ();
 206   fp->mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
 207   fp->data.low = bp_unpack_var_len_int (bp);
 208   fp->data.high = bp_unpack_var_len_int (bp);
 209   TREE_FIXED_CST_PTR (expr) = fp;
 210 }
 211
 212 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
 213    of expression EXPR from bitpack BP.  */
 214
 215 static void
 216 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 217 {
 218   DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
 219   DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 220   DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 221   DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 222   DECL_ABSTRACT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 223   DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 224   DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 225   DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 226   DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 227   DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 228   DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
 229
 230   if (TREE_CODE (expr) == LABEL_DECL)
 231     {
 232       EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
 233
 234       /* Always assume an initial value of -1 for LABEL_DECL_UID to
 235          force gimple_set_bb to recreate label_to_block_map.  */
 236       LABEL_DECL_UID (expr) = -1;
 237     }
 238
 239   if (TREE_CODE (expr) == FIELD_DECL)
 240     {
 241       DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 242       DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 243       expr->decl_common.off_align = bp_unpack_value (bp, 8);
 244     }
 245
 246   if (TREE_CODE (expr) == VAR_DECL)
 247     {
 248       DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 249       DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
 250     }
 251
 252   if (TREE_CODE (expr) == RESULT_DECL
 253       || TREE_CODE (expr) == PARM_DECL
 254       || TREE_CODE (expr) == VAR_DECL)
 255     {
 256       DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
 257       if (TREE_CODE (expr) == VAR_DECL
 258           || TREE_CODE (expr) == PARM_DECL)
 259         DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 260     }
 261 }
 262
 263
 264 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
 265    of expression EXPR from bitpack BP.  */
 266
 267 static void
 268 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 269 {
 270   DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 271 }
 272
 273
 274 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 275    of expression EXPR from bitpack BP.  */
 276
 277 static void
 278 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 279 {
 280   DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
 281   DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 282   DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
 283   DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp,  1);
 284   DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp,  1);
 285   DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp,  2);
 286   DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp,  1);
 287
 288   if (TREE_CODE (expr) == VAR_DECL)
 289     {
 290       DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 291       DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
 292     }
 293
 294   if (TREE_CODE (expr) == FUNCTION_DECL)
 295     {
 296       DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 297       DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 298       DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 299     }
 300 }
 301
 302
 303 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
 304    of expression EXPR from bitpack BP.  */
 305
 306 static void
 307 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 308 {
 309   DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
 310                                                BUILT_IN_LAST);
 311   DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 312   DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 313   DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 314   DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
 315   DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
 316   DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
 317   DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
 318   DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
 319   DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 320   DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
 321   DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 322   DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
 323                         = (unsigned) bp_unpack_value (bp, 1);
 324   DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
 325   DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
 326   DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 327   DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 328   if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
 329     {
 330       DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
 331                                                                             11);
 332       if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
 333           && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
 334         fatal_error ("machine independent builtin code out of range");
 335       else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
 336         {
 337           tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
 338           if (!result || result == error_mark_node)
 339             fatal_error ("target specific builtin not available");
 340         }
 341     }
 342 }
 343
 344
 345 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
 346    of expression EXPR from bitpack BP.  */
 347
 348 static void
 349 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 350 {
 351   enum machine_mode mode;
 352
 353   mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
 354   SET_TYPE_MODE (expr, mode);
 355   TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
 356   TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1);
 357   TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1);
 358   if (RECORD_OR_UNION_TYPE_P (expr))
 359     {
 360       TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
 361       TYPE_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 362     }
 363   else if (TREE_CODE (expr) == ARRAY_TYPE)
 364     TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
 365   TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 366   TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
 367   TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 368   TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 369   TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
 370   TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp);
 371   TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp);
 372 }
 373
 374
 375 /* Unpack all the non-pointer fields of the TS_BLOCK structure
 376    of expression EXPR from bitpack BP.  */
 377
 378 static void
 379 unpack_ts_block_value_fields (struct data_in *data_in,
 380                               struct bitpack_d *bp, tree expr)
 381 {
 382   BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
 383   /* BLOCK_NUMBER is recomputed.  */
 384   BLOCK_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
 385 }
 386
 387 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
 388    structure of expression EXPR from bitpack BP.  */
 389
 390 static void
 391 unpack_ts_translation_unit_decl_value_fields (struct data_in *data_in,
 392                                               struct bitpack_d *bp, tree expr)
 393 {
 394   TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
 395   vec_safe_push (all_translation_units, expr);
 396 }
 397
 398 /* Unpack a TS_OPTIMIZATION tree from BP into EXPR.  */
 399
 400 static void
 401 unpack_ts_optimization (struct bitpack_d *bp, tree expr)
 402 {
 403   unsigned i, len;
 404   struct cl_optimization *t = TREE_OPTIMIZATION (expr);
 405
 406   len = sizeof (struct cl_optimization);
 407   for (i = 0; i < len; i++)
 408     ((unsigned char *)t)[i] = bp_unpack_value (bp, 8);
 409   if (bp_unpack_value (bp, 32) != 0x12345678)
 410     fatal_error ("cl_optimization size mismatch in LTO reader and writer");
 411 }
 412
 413
 414 /* Unpack all the non-pointer fields of the TS_OMP_CLAUSE
 415    structure of expression EXPR from bitpack BP.  */
 416
 417 static void
 418 unpack_ts_omp_clause_value_fields (struct data_in *data_in,
 419                                    struct bitpack_d *bp, tree expr)
 420 {
 421   OMP_CLAUSE_LOCATION (expr) = stream_input_location (bp, data_in);
 422   switch (OMP_CLAUSE_CODE (expr))
 423     {
 424     case OMP_CLAUSE_DEFAULT:
 425       OMP_CLAUSE_DEFAULT_KIND (expr)
 426         = bp_unpack_enum (bp, omp_clause_default_kind,
 427                           OMP_CLAUSE_DEFAULT_LAST);
 428       break;
 429     case OMP_CLAUSE_SCHEDULE:
 430       OMP_CLAUSE_SCHEDULE_KIND (expr)
 431         = bp_unpack_enum (bp, omp_clause_schedule_kind,
 432                           OMP_CLAUSE_SCHEDULE_LAST);
 433       break;
 434     case OMP_CLAUSE_DEPEND:
 435       OMP_CLAUSE_DEPEND_KIND (expr)
 436         = bp_unpack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST);
 437       break;
 438     case OMP_CLAUSE_MAP:
 439       OMP_CLAUSE_MAP_KIND (expr)
 440         = bp_unpack_enum (bp, omp_clause_map_kind, OMP_CLAUSE_MAP_LAST);
 441       break;
 442     case OMP_CLAUSE_PROC_BIND:
 443       OMP_CLAUSE_PROC_BIND_KIND (expr)
 444         = bp_unpack_enum (bp, omp_clause_proc_bind_kind,
 445                           OMP_CLAUSE_PROC_BIND_LAST);
 446       break;
 447     case OMP_CLAUSE_REDUCTION:
 448       OMP_CLAUSE_REDUCTION_CODE (expr)
 449         = bp_unpack_enum (bp, tree_code, MAX_TREE_CODES);
 450       break;
 451     default:
 452       break;
 453     }
 454 }
 455
 456 /* Unpack all the non-pointer fields in EXPR into a bit pack.  */
 457
 458 static void
 459 unpack_value_fields (struct data_in *data_in, struct bitpack_d *bp, tree expr)
 460 {
 461   enum tree_code code;
 462
 463   code = TREE_CODE (expr);
 464
 465   /* Note that all these functions are highly sensitive to changes in
 466      the types and sizes of each of the fields being packed.  */
 467   unpack_ts_base_value_fields (bp, expr);
 468
 469   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 470     unpack_ts_int_cst_value_fields (bp, expr);
 471
 472   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 473     unpack_ts_real_cst_value_fields (bp, expr);
 474
 475   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 476     unpack_ts_fixed_cst_value_fields (bp, expr);
 477
 478   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 479     DECL_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
 480
 481   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 482     unpack_ts_decl_common_value_fields (bp, expr);
 483
 484   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 485     unpack_ts_decl_wrtl_value_fields (bp, expr);
 486
 487   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 488     unpack_ts_decl_with_vis_value_fields (bp, expr);
 489
 490   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 491     unpack_ts_function_decl_value_fields (bp, expr);
 492
 493   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 494     unpack_ts_type_common_value_fields (bp, expr);
 495
 496   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 497     SET_EXPR_LOCATION (expr, stream_input_location (bp, data_in));
 498
 499   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 500     unpack_ts_block_value_fields (data_in, bp, expr);
 501
 502   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 503     unpack_ts_translation_unit_decl_value_fields (data_in, bp, expr);
 504
 505   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
 506     gcc_unreachable ();
 507
 508   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 509     unpack_ts_optimization (bp, expr);
 510
 511   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 512     {
 513       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
 514       if (length > 0)
 515         vec_safe_grow (BINFO_BASE_ACCESSES (expr), length);
 516     }
 517
 518   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 519     {
 520       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
 521       if (length > 0)
 522         vec_safe_grow (CONSTRUCTOR_ELTS (expr), length);
 523     }
 524
 525   if (code == OMP_CLAUSE)
 526     unpack_ts_omp_clause_value_fields (data_in, bp, expr);
 527 }
 528
 529
 530 /* Read all the language-independent bitfield values for EXPR from IB.
 531    Return the partially unpacked bitpack so the caller can unpack any other
 532    bitfield values that the writer may have written.  */
 533
 534 struct bitpack_d
 535 streamer_read_tree_bitfields (struct lto_input_block *ib,
 536                               struct data_in *data_in, tree expr)
 537 {
 538   enum tree_code code;
 539   struct bitpack_d bp;
 540
 541   /* Read the bitpack of non-pointer values from IB.  */
 542   bp = streamer_read_bitpack (ib);
 543
 544   /* The first word in BP contains the code of the tree that we
 545      are about to read.  */
 546   code = (enum tree_code) bp_unpack_value (&bp, 16);
 547   lto_tag_check (lto_tree_code_to_tag (code),
 548                  lto_tree_code_to_tag (TREE_CODE (expr)));
 549
 550   /* Unpack all the value fields from BP.  */
 551   unpack_value_fields (data_in, &bp, expr);
 552
 553   return bp;
 554 }
 555
 556
 557 /* Materialize a new tree from input block IB using descriptors in
 558    DATA_IN.  The code for the new tree should match TAG.  Store in
 559    *IX_P the index into the reader cache where the new tree is stored.  */
 560
 561 tree
 562 streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
 563                      enum LTO_tags tag)
 564 {
 565   enum tree_code code;
 566   tree result;
 567 #ifdef LTO_STREAMER_DEBUG
 568   HOST_WIDE_INT orig_address_in_writer;
 569 #endif
 570
 571   result = NULL_TREE;
 572
 573 #ifdef LTO_STREAMER_DEBUG
 574   /* Read the word representing the memory address for the tree
 575      as it was written by the writer.  This is useful when
 576      debugging differences between the writer and reader.  */
 577   orig_address_in_writer = streamer_read_hwi (ib);
 578   gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
 579 #endif
 580
 581   code = lto_tag_to_tree_code (tag);
 582
 583   /* We should never see an SSA_NAME tree.  Only the version numbers of
 584      SSA names are ever written out.  See input_ssa_names.  */
 585   gcc_assert (code != SSA_NAME);
 586
 587   /* Instantiate a new tree using the header data.  */
 588   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
 589     result = streamer_read_string_cst (data_in, ib);
 590   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
 591     result = input_identifier (data_in, ib);
 592   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 593     {
 594       HOST_WIDE_INT len = streamer_read_hwi (ib);
 595       result = make_tree_vec (len);
 596     }
 597   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 598     {
 599       HOST_WIDE_INT len = streamer_read_hwi (ib);
 600       result = make_vector (len);
 601     }
 602   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 603     {
 604       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 605       result = make_tree_binfo (len);
 606     }
 607   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 608     {
 609       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 610       unsigned HOST_WIDE_INT ext_len = streamer_read_uhwi (ib);
 611       result = make_int_cst (len, ext_len);
 612     }
 613   else if (code == CALL_EXPR)
 614     {
 615       unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
 616       return build_vl_exp (CALL_EXPR, nargs + 3);
 617     }
 618   else if (code == OMP_CLAUSE)
 619     {
 620       enum omp_clause_code subcode
 621         = (enum omp_clause_code) streamer_read_uhwi (ib);
 622       return build_omp_clause (UNKNOWN_LOCATION, subcode);
 623     }
 624   else
 625     {
 626       /* For all other nodes, materialize the tree with a raw
 627          make_node call.  */
 628       result = make_node (code);
 629     }
 630
 631 #ifdef LTO_STREAMER_DEBUG
 632   /* Store the original address of the tree as seen by the writer
 633      in RESULT's aux field.  This is useful when debugging streaming
 634      problems.  This way, a debugging session can be started on
 635      both writer and reader with a breakpoint using this address
 636      value in both.  */
 637   lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
 638 #endif
 639
 640   return result;
 641 }
 642
 643
 644 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
 645    block IB.  DATA_IN contains tables and descriptors for the
 646    file being read.  */
 647
 648
 649 static void
 650 lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
 651                                    struct data_in *data_in, tree expr)
 652 {
 653   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 654     TREE_TYPE (expr) = stream_read_tree (ib, data_in);
 655 }
 656
 657
 658 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
 659    block IB.  DATA_IN contains tables and descriptors for the
 660    file being read.  */
 661
 662 static void
 663 lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
 664                                    struct data_in *data_in, tree expr)
 665 {
 666   unsigned i;
 667   for (i = 0; i < VECTOR_CST_NELTS (expr); ++i)
 668     VECTOR_CST_ELT (expr, i) = stream_read_tree (ib, data_in);
 669 }
 670
 671
 672 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
 673    block IB.  DATA_IN contains tables and descriptors for the
 674    file being read.  */
 675
 676 static void
 677 lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
 678                                     struct data_in *data_in, tree expr)
 679 {
 680   TREE_REALPART (expr) = stream_read_tree (ib, data_in);
 681   TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
 682 }
 683
 684
 685 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 686    from input block IB.  DATA_IN contains tables and descriptors for the
 687    file being read.  */
 688
 689 static void
 690 lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
 691                                          struct data_in *data_in, tree expr)
 692 {
 693   DECL_NAME (expr) = stream_read_tree (ib, data_in);
 694   DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
 695 }
 696
 697
 698 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
 699    input block IB.  DATA_IN contains tables and descriptors for the
 700    file being read.  */
 701
 702 static void
 703 lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
 704                                         struct data_in *data_in, tree expr)
 705 {
 706   DECL_SIZE (expr) = stream_read_tree (ib, data_in);
 707   DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
 708   DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
 709
 710   /* Do not stream DECL_ABSTRACT_ORIGIN.  We cannot handle debug information
 711      for early inlining so drop it on the floor instead of ICEing in
 712      dwarf2out.c.  */
 713
 714   if ((TREE_CODE (expr) == VAR_DECL
 715        || TREE_CODE (expr) == PARM_DECL)
 716       && DECL_HAS_VALUE_EXPR_P (expr))
 717     SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
 718
 719   if (TREE_CODE (expr) == VAR_DECL)
 720     {
 721       tree dexpr = stream_read_tree (ib, data_in);
 722       if (dexpr)
 723         SET_DECL_DEBUG_EXPR (expr, dexpr);
 724     }
 725 }
 726
 727
 728 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
 729    EXPR from input block IB.  DATA_IN contains tables and descriptors for the
 730    file being read.  */
 731
 732 static void
 733 lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
 734                                             struct data_in *data_in, tree expr)
 735 {
 736   if (TREE_CODE (expr) == TYPE_DECL)
 737     DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
 738 }
 739
 740
 741 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 742    from input block IB.  DATA_IN contains tables and descriptors for the
 743    file being read.  */
 744
 745 static void
 746 lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
 747                                           struct data_in *data_in, tree expr)
 748 {
 749   tree id;
 750
 751   id = stream_read_tree (ib, data_in);
 752   if (id)
 753     {
 754       gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
 755       SET_DECL_ASSEMBLER_NAME (expr, id);
 756     }
 757 }
 758
 759
 760 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
 761    input block IB.  DATA_IN contains tables and descriptors for the
 762    file being read.  */
 763
 764 static void
 765 lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
 766                                        struct data_in *data_in, tree expr)
 767 {
 768   DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
 769   DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
 770   DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
 771   DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
 772   DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
 773 }
 774
 775
 776 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 777    from input block IB.  DATA_IN contains tables and descriptors for the
 778    file being read.  */
 779
 780 static void
 781 lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
 782                                           struct data_in *data_in, tree expr)
 783 {
 784   DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
 785   /* DECL_STRUCT_FUNCTION is loaded on demand by cgraph_get_body.  */
 786   DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
 787   /* DECL_FUNCTION_SPECIFIC_TARGET is regenerated from attributes.  */
 788   DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
 789
 790   /* If the file contains a function with an EH personality set,
 791      then it was compiled with -fexceptions.  In that case, initialize
 792      the backend EH machinery.  */
 793   if (DECL_FUNCTION_PERSONALITY (expr))
 794     lto_init_eh ();
 795 }
 796
 797
 798 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
 799    input block IB.  DATA_IN contains tables and descriptors for the file
 800    being read.  */
 801
 802 static void
 803 lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
 804                                         struct data_in *data_in, tree expr)
 805 {
 806   TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
 807   TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
 808   TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
 809   TYPE_NAME (expr) = stream_read_tree (ib, data_in);
 810   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 811      reconstructed during fixup.  */
 812   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 813      during fixup.  */
 814   TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
 815   TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
 816   /* TYPE_CANONICAL gets re-computed during type merging.  */
 817   TYPE_CANONICAL (expr) = NULL_TREE;
 818   TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
 819 }
 820
 821 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 822    from input block IB.  DATA_IN contains tables and descriptors for the
 823    file being read.  */
 824
 825 static void
 826 lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
 827                                             struct data_in *data_in,
 828                                             tree expr)
 829 {
 830   if (TREE_CODE (expr) == ENUMERAL_TYPE)
 831     TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
 832   else if (TREE_CODE (expr) == ARRAY_TYPE)
 833     TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
 834   else if (RECORD_OR_UNION_TYPE_P (expr))
 835     TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
 836   else if (TREE_CODE (expr) == FUNCTION_TYPE
 837            || TREE_CODE (expr) == METHOD_TYPE)
 838     TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
 839
 840   if (!POINTER_TYPE_P (expr))
 841     TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
 842   TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
 843   if (RECORD_OR_UNION_TYPE_P (expr))
 844     TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
 845 }
 846
 847
 848 /* Read all pointer fields in the TS_LIST structure of EXPR from input
 849    block IB.  DATA_IN contains tables and descriptors for the
 850    file being read.  */
 851
 852 static void
 853 lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
 854                                  struct data_in *data_in, tree expr)
 855 {
 856   TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
 857   TREE_VALUE (expr) = stream_read_tree (ib, data_in);
 858   TREE_CHAIN (expr) = stream_read_tree (ib, data_in);
 859 }
 860
 861
 862 /* Read all pointer fields in the TS_VEC structure of EXPR from input
 863    block IB.  DATA_IN contains tables and descriptors for the
 864    file being read.  */
 865
 866 static void
 867 lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
 868                                 struct data_in *data_in, tree expr)
 869 {
 870   int i;
 871
 872   /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
 873      instantiate EXPR.  */
 874   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 875     TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
 876 }
 877
 878
 879 /* Read all pointer fields in the TS_EXP structure of EXPR from input
 880    block IB.  DATA_IN contains tables and descriptors for the
 881    file being read.  */
 882
 883
 884 static void
 885 lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
 886                                 struct data_in *data_in, tree expr)
 887 {
 888   int i;
 889
 890   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 891     TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
 892
 893   TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
 894 }
 895
 896
 897 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
 898    block IB.  DATA_IN contains tables and descriptors for the
 899    file being read.  */
 900
 901 static void
 902 lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
 903                                   struct data_in *data_in, tree expr)
 904 {
 905   BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
 906
 907   BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
 908
 909   /* Stream BLOCK_ABSTRACT_ORIGIN and BLOCK_SOURCE_LOCATION for
 910      the limited cases we can handle - those that represent inlined
 911      function scopes.  For the rest them on the floor instead of ICEing in
 912      dwarf2out.c.  */
 913   BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree (ib, data_in);
 914   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 915      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 916      dwarf2out.c.  */
 917
 918   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 919      streaming time.  */
 920
 921   /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
 922      of streaming it.  For non-BLOCK BLOCK_SUPERCONTEXTs we still
 923      stream the child relationship explicitly.  */
 924   if (BLOCK_SUPERCONTEXT (expr)
 925       && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
 926     {
 927       BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
 928       BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
 929     }
 930
 931   /* The global block is rooted at the TU decl.  Hook it here to
 932      avoid the need to stream in this block during WPA time.  */
 933   else if (BLOCK_SUPERCONTEXT (expr)
 934            && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
 935     DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
 936
 937   /* The function-level block is connected at the time we read in
 938      function bodies for the same reason.  */
 939 }
 940
 941
 942 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
 943    block IB.  DATA_IN contains tables and descriptors for the
 944    file being read.  */
 945
 946 static void
 947 lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
 948                                   struct data_in *data_in, tree expr)
 949 {
 950   unsigned i;
 951   tree t;
 952
 953   /* Note that the number of slots in EXPR was read in
 954      streamer_alloc_tree when instantiating EXPR.  However, the
 955      vector is empty so we cannot rely on vec::length to know how many
 956      elements to read.  So, this list is emitted as a 0-terminated
 957      list on the writer side.  */
 958   do
 959     {
 960       t = stream_read_tree (ib, data_in);
 961       if (t)
 962         BINFO_BASE_BINFOS (expr)->quick_push (t);
 963     }
 964   while (t);
 965
 966   BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
 967   BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
 968   BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
 969
 970   /* The vector of BINFO_BASE_ACCESSES is pre-allocated during
 971      unpacking the bitfield section.  */
 972   for (i = 0; i < vec_safe_length (BINFO_BASE_ACCESSES (expr)); i++)
 973     {
 974       tree a = stream_read_tree (ib, data_in);
 975       (*BINFO_BASE_ACCESSES (expr))[i] = a;
 976     }
 977   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX
 978      and BINFO_VPTR_INDEX; these are used by C++ FE only.  */
 979 }
 980
 981
 982 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
 983    input block IB.  DATA_IN contains tables and descriptors for the
 984    file being read.  */
 985
 986 static void
 987 lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
 988                                         struct data_in *data_in, tree expr)
 989 {
 990   unsigned i;
 991
 992   for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
 993     {
 994       constructor_elt e;
 995       e.index = stream_read_tree (ib, data_in);
 996       e.value = stream_read_tree (ib, data_in);
 997       (*CONSTRUCTOR_ELTS (expr))[i] = e;
 998     }
 999 }
1000
1001
1002 /* Read all pointer fields in the TS_OMP_CLAUSE structure of EXPR from
1003    input block IB.  DATA_IN contains tables and descriptors for the
1004    file being read.  */
1005
1006 static void
1007 lto_input_ts_omp_clause_tree_pointers (struct lto_input_block *ib,
1008                                        struct data_in *data_in, tree expr)
1009 {
1010   int i;
1011
1012   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
1013     OMP_CLAUSE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
1014   OMP_CLAUSE_CHAIN (expr) = stream_read_tree (ib, data_in);
1015 }
1016
1017
1018 /* Read all pointer fields in EXPR from input block IB.  DATA_IN
1019    contains tables and descriptors for the file being read.  */
1020
1021 void
1022 streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
1023                          tree expr)
1024 {
1025   enum tree_code code;
1026
1027   code = TREE_CODE (expr);
1028
1029   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
1030     lto_input_ts_common_tree_pointers (ib, data_in, expr);
1031
1032   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1033     lto_input_ts_vector_tree_pointers (ib, data_in, expr);
1034
1035   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1036     lto_input_ts_complex_tree_pointers (ib, data_in, expr);
1037
1038   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1039     lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
1040
1041   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1042     lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
1043
1044   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1045     lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
1046
1047   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1048     lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
1049
1050   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1051     lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
1052
1053   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1054     lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1055
1056   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1057     lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1058
1059   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1060     lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1061
1062   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1063     lto_input_ts_list_tree_pointers (ib, data_in, expr);
1064
1065   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1066     lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1067
1068   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1069     lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1070
1071   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1072     lto_input_ts_block_tree_pointers (ib, data_in, expr);
1073
1074   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1075     lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1076
1077   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1078     lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1079
1080   if (code == OMP_CLAUSE)
1081     lto_input_ts_omp_clause_tree_pointers (ib, data_in, expr);
1082 }
1083
1084
1085 /* Read an index IX from input block IB and return the tree node at
1086    DATA_IN->FILE_DATA->GLOBALS_INDEX[IX].  */
1087
1088 tree
1089 streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1090 {
1091   unsigned HOST_WIDE_INT ix;
1092   tree result;
1093   enum LTO_tags expected_tag;
1094
1095   ix = streamer_read_uhwi (ib);
1096   expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1097
1098   result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1099   gcc_assert (result
1100               && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1101
1102   return result;
1103 }
1104
1105
1106 /* Read a code and class from input block IB and return the
1107    corresponding builtin.  DATA_IN is as in stream_read_tree.  */
1108
1109 tree
1110 streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1111 {
1112   enum built_in_class fclass;
1113   enum built_in_function fcode;
1114   const char *asmname;
1115   tree result;
1116
1117   fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1118   gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1119
1120   fcode = (enum built_in_function) streamer_read_uhwi (ib);
1121
1122   if (fclass == BUILT_IN_NORMAL)
1123     {
1124       if (fcode >= END_BUILTINS)
1125         fatal_error ("machine independent builtin code out of range");
1126       result = builtin_decl_explicit (fcode);
1127       gcc_assert (result);
1128     }
1129   else if (fclass == BUILT_IN_MD)
1130     {
1131       result = targetm.builtin_decl (fcode, true);
1132       if (!result || result == error_mark_node)
1133         fatal_error ("target specific builtin not available");
1134     }
1135   else
1136     gcc_unreachable ();
1137
1138   asmname = streamer_read_string (data_in, ib);
1139   if (asmname)
1140     set_builtin_user_assembler_name (result, asmname);
1141
1142   streamer_tree_cache_append (data_in->reader_cache, result, 0);
1143
1144   return result;
1145 }