gcc/tree-streamer-in.cc

   1 /* Routines for reading trees from a file stream.
   2
   3    Copyright (C) 2011-2023 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 "backend.h"
  26 #include "target.h"
  27 #include "tree.h"
  28 #include "gimple.h"
  29 #include "stringpool.h"
  30 #include "tree-streamer.h"
  31 #include "cgraph.h"
  32 #include "builtins.h"
  33 #include "gomp-constants.h"
  34 #include "stringpool.h"
  35 #include "attribs.h"
  36 #include "asan.h"
  37 #include "opts.h"
  38
  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 (class data_in *data_in, class 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 (class data_in *data_in, class 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 static tree
  76 streamer_read_chain (class lto_input_block *ib, class 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_ref (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 inline 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     {
 123       DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
 124       DECL_NAMELESS (expr) = (unsigned) bp_unpack_value (bp, 1);
 125     }
 126   else if (TYPE_P (expr))
 127     TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
 128   else
 129     bp_unpack_value (bp, 1);
 130   TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
 131   if (TYPE_P (expr))
 132     TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 133   else
 134     TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
 135   TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
 136   TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
 137   if (TREE_CODE (expr) != TREE_BINFO)
 138     TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
 139   else
 140     bp_unpack_value (bp, 1);
 141   TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
 142   TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
 143   if (TYPE_P (expr))
 144     {
 145       if (AGGREGATE_TYPE_P (expr))
 146         TYPE_REVERSE_STORAGE_ORDER (expr) = (unsigned) bp_unpack_value (bp, 1);
 147       else
 148         TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
 149 #ifndef ACCEL_COMPILER
 150       TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
 151 #endif
 152     }
 153   else if (TREE_CODE (expr) == BIT_FIELD_REF || TREE_CODE (expr) == MEM_REF)
 154     {
 155       REF_REVERSE_STORAGE_ORDER (expr) = (unsigned) bp_unpack_value (bp, 1);
 156       bp_unpack_value (bp, 8);
 157     }
 158   else if (TREE_CODE (expr) == SSA_NAME)
 159     {
 160       SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
 161       bp_unpack_value (bp, 8);
 162     }
 163   else if (TREE_CODE (expr) == CALL_EXPR)
 164     {
 165       CALL_EXPR_BY_DESCRIPTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 166       bp_unpack_value (bp, 8);
 167     }
 168   else
 169     bp_unpack_value (bp, 9);
 170 }
 171
 172
 173 /* Unpack all the non-pointer fields of the TS_INT_CST structure of
 174    expression EXPR from bitpack BP.  */
 175
 176 static void
 177 unpack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
 178 {
 179   int i;
 180   for (i = 0; i < TREE_INT_CST_EXT_NUNITS (expr); i++)
 181     TREE_INT_CST_ELT (expr, i) = bp_unpack_var_len_int (bp);
 182 }
 183
 184
 185 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of
 186    expression EXPR from bitpack BP.  */
 187
 188 static void
 189 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
 190 {
 191   REAL_VALUE_TYPE r;
 192
 193   bp_unpack_real_value (bp, &r);
 194   memcpy (TREE_REAL_CST_PTR (expr), &r, sizeof (REAL_VALUE_TYPE));
 195 }
 196
 197
 198 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
 199    expression EXPR from bitpack BP.  */
 200
 201 static void
 202 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 203 {
 204   FIXED_VALUE_TYPE *fp = ggc_alloc<fixed_value> ();
 205   fp->mode = as_a <scalar_mode> (bp_unpack_machine_mode (bp));
 206   fp->data.low = bp_unpack_var_len_int (bp);
 207   fp->data.high = bp_unpack_var_len_int (bp);
 208   TREE_FIXED_CST_PTR (expr) = fp;
 209 }
 210
 211 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
 212    of expression EXPR from bitpack BP.  */
 213
 214 static void
 215 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 216 {
 217   SET_DECL_MODE (expr, bp_unpack_machine_mode (bp));
 218   DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 219   DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 220   DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 221   DECL_ABSTRACT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 222   DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 223   DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 224   DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 225   DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 226   DECL_NOT_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 227   SET_DECL_ALIGN (expr, (unsigned) bp_unpack_var_len_unsigned (bp));
 228 #ifdef ACCEL_COMPILER
 229   if (DECL_ALIGN (expr) > targetm.absolute_biggest_alignment)
 230     SET_DECL_ALIGN (expr, targetm.absolute_biggest_alignment);
 231 #endif
 232   if (TREE_CODE (expr) == LABEL_DECL)
 233     {
 234       EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
 235
 236       /* Always assume an initial value of -1 for LABEL_DECL_UID to
 237          force gimple_set_bb to recreate label_to_block_map.  */
 238       LABEL_DECL_UID (expr) = -1;
 239     }
 240
 241   else if (TREE_CODE (expr) == FIELD_DECL)
 242     {
 243       DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 244       DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 245       DECL_PADDING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 246       unsigned val = (unsigned) bp_unpack_value (bp, 1);
 247       if (DECL_BIT_FIELD (expr))
 248         SET_DECL_FIELD_CXX_ZERO_WIDTH_BIT_FIELD (expr, val);
 249       else
 250         SET_DECL_FIELD_ABI_IGNORED (expr, val);
 251       expr->decl_common.off_align = bp_unpack_value (bp, 8);
 252       DECL_NOT_FLEXARRAY (expr) = (unsigned) bp_unpack_value (bp, 1);
 253     }
 254
 255   else if (VAR_P (expr))
 256     {
 257       DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 258       DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
 259     }
 260
 261   else if (TREE_CODE (expr) == PARM_DECL)
 262     DECL_HIDDEN_STRING_LENGTH (expr) = (unsigned) bp_unpack_value (bp, 1);
 263
 264   if (TREE_CODE (expr) == RESULT_DECL
 265       || TREE_CODE (expr) == PARM_DECL
 266       || VAR_P (expr))
 267     {
 268       DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
 269       if (VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 270         DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 271     }
 272 }
 273
 274
 275 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
 276    of expression EXPR from bitpack BP.  */
 277
 278 static void
 279 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 280 {
 281   DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 282 }
 283
 284
 285 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 286    of expression EXPR from bitpack BP.  */
 287
 288 static void
 289 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 290 {
 291   DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
 292   DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 293   DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
 294   DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp,  1);
 295   DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp,  1);
 296   DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp,  2);
 297   DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp,  1);
 298
 299   if (VAR_P (expr))
 300     {
 301       DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 302       DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
 303     }
 304
 305   if (TREE_CODE (expr) == FUNCTION_DECL)
 306     {
 307       DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 308       DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 309       DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 310     }
 311 }
 312
 313
 314 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
 315    of expression EXPR from bitpack BP.  */
 316
 317 static void
 318 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 319 {
 320   built_in_class cl = bp_unpack_enum (bp, built_in_class, BUILT_IN_LAST);
 321   DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 322   DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 323   DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 324   DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
 325   DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
 326   DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
 327   DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
 328   FUNCTION_DECL_DECL_TYPE (expr) = (function_decl_type) bp_unpack_value (bp, 2);
 329   DECL_SET_IS_OPERATOR_DELETE (expr, (unsigned) bp_unpack_value (bp, 1));
 330   DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 331   DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
 332   DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 333   DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
 334                         = (unsigned) bp_unpack_value (bp, 1);
 335   DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
 336   DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
 337   DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 338   DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 339   DECL_IS_REPLACEABLE_OPERATOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 340   unsigned int fcode = 0;
 341   if (cl != NOT_BUILT_IN)
 342     {
 343       fcode = bp_unpack_value (bp, 32);
 344       if (cl == BUILT_IN_NORMAL && fcode >= END_BUILTINS)
 345         fatal_error (input_location,
 346                      "machine independent builtin code out of range");
 347       else if (cl == BUILT_IN_MD)
 348         {
 349           tree result = targetm.builtin_decl (fcode, true);
 350           if (!result || result == error_mark_node)
 351             fatal_error (input_location,
 352                          "target specific builtin not available");
 353         }
 354     }
 355   set_decl_built_in_function (expr, cl, fcode);
 356 }
 357
 358
 359 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
 360    of expression EXPR from bitpack BP.  */
 361
 362 static void
 363 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 364 {
 365   machine_mode mode;
 366
 367   mode = bp_unpack_machine_mode (bp);
 368   SET_TYPE_MODE (expr, mode);
 369   /* TYPE_NO_FORCE_BLK is private to stor-layout and need
 370      no streaming.  */
 371   TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 372   TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
 373   TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 374   TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 375   TYPE_LANG_FLAG_0 (expr) = (unsigned) bp_unpack_value (bp, 1);
 376   if (RECORD_OR_UNION_TYPE_P (expr))
 377     {
 378       TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
 379       TYPE_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 380       TYPE_CXX_ODR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 381     }
 382   else if (TREE_CODE (expr) == ARRAY_TYPE)
 383     TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
 384   if (TREE_CODE (expr) == ARRAY_TYPE || TREE_CODE (expr) == INTEGER_TYPE)
 385     TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
 386   if (AGGREGATE_TYPE_P (expr))
 387     TYPE_TYPELESS_STORAGE (expr) = (unsigned) bp_unpack_value (bp, 1);
 388   TYPE_EMPTY_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 389   if (FUNC_OR_METHOD_TYPE_P (expr))
 390     TYPE_NO_NAMED_ARGS_STDARG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 391   if (RECORD_OR_UNION_TYPE_P (expr))
 392     TYPE_INCLUDES_FLEXARRAY (expr) = (unsigned) bp_unpack_value (bp, 1);
 393   TYPE_PRECISION_RAW (expr) = bp_unpack_var_len_unsigned (bp);
 394   SET_TYPE_ALIGN (expr, bp_unpack_var_len_unsigned (bp));
 395 #ifdef ACCEL_COMPILER
 396   if (TYPE_ALIGN (expr) > targetm.absolute_biggest_alignment)
 397     SET_TYPE_ALIGN (expr, targetm.absolute_biggest_alignment);
 398 #endif
 399 }
 400
 401
 402 /* Unpack all the non-pointer fields of the TS_BLOCK structure
 403    of expression EXPR from bitpack BP.  */
 404
 405 static void
 406 unpack_ts_block_value_fields (class data_in *data_in,
 407                               struct bitpack_d *bp, tree expr)
 408 {
 409   /* BLOCK_NUMBER is recomputed.  */
 410   stream_input_location (&BLOCK_SOURCE_LOCATION (expr), bp, data_in);
 411 }
 412
 413 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
 414    structure of expression EXPR from bitpack BP.  */
 415
 416 static void
 417 unpack_ts_translation_unit_decl_value_fields (class data_in *data_in,
 418                                               struct bitpack_d *bp, tree expr)
 419 {
 420   TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
 421   vec_safe_push (all_translation_units, expr);
 422 }
 423
 424
 425 /* Unpack all the non-pointer fields of the TS_OMP_CLAUSE
 426    structure of expression EXPR from bitpack BP.  */
 427
 428 static void
 429 unpack_ts_omp_clause_value_fields (class data_in *data_in,
 430                                    struct bitpack_d *bp, tree expr)
 431 {
 432   stream_input_location (&OMP_CLAUSE_LOCATION (expr), bp, data_in);
 433   switch (OMP_CLAUSE_CODE (expr))
 434     {
 435     case OMP_CLAUSE_DEFAULT:
 436       OMP_CLAUSE_DEFAULT_KIND (expr)
 437         = bp_unpack_enum (bp, omp_clause_default_kind,
 438                           OMP_CLAUSE_DEFAULT_LAST);
 439       break;
 440     case OMP_CLAUSE_SCHEDULE:
 441       OMP_CLAUSE_SCHEDULE_KIND (expr)
 442         = bp_unpack_enum (bp, omp_clause_schedule_kind,
 443                           OMP_CLAUSE_SCHEDULE_LAST);
 444       break;
 445     case OMP_CLAUSE_DEPEND:
 446       OMP_CLAUSE_DEPEND_KIND (expr)
 447         = bp_unpack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST);
 448       break;
 449     case OMP_CLAUSE_DOACROSS:
 450       OMP_CLAUSE_DOACROSS_KIND (expr)
 451         = bp_unpack_enum (bp, omp_clause_doacross_kind,
 452                           OMP_CLAUSE_DOACROSS_LAST);
 453       break;
 454     case OMP_CLAUSE_MAP:
 455       OMP_CLAUSE_SET_MAP_KIND (expr, bp_unpack_enum (bp, gomp_map_kind,
 456                                                      GOMP_MAP_LAST));
 457       break;
 458     case OMP_CLAUSE_PROC_BIND:
 459       OMP_CLAUSE_PROC_BIND_KIND (expr)
 460         = bp_unpack_enum (bp, omp_clause_proc_bind_kind,
 461                           OMP_CLAUSE_PROC_BIND_LAST);
 462       break;
 463     case OMP_CLAUSE_REDUCTION:
 464     case OMP_CLAUSE_TASK_REDUCTION:
 465     case OMP_CLAUSE_IN_REDUCTION:
 466       OMP_CLAUSE_REDUCTION_CODE (expr)
 467         = bp_unpack_enum (bp, tree_code, MAX_TREE_CODES);
 468       break;
 469     default:
 470       break;
 471     }
 472 }
 473
 474
 475 /* Read all the language-independent bitfield values for EXPR from IB.
 476    Return the partially unpacked bitpack so the caller can unpack any other
 477    bitfield values that the writer may have written.  */
 478
 479 void
 480 streamer_read_tree_bitfields (class lto_input_block *ib,
 481                               class data_in *data_in, tree expr)
 482 {
 483   enum tree_code code;
 484   struct bitpack_d bp;
 485
 486   /* Read the bitpack of non-pointer values from IB.  */
 487   bp = streamer_read_bitpack (ib);
 488
 489   /* The first word in BP contains the code of the tree that we
 490      are about to read.  */
 491   if (streamer_debugging)
 492     {
 493       code = (enum tree_code) bp_unpack_value (&bp, 16);
 494       lto_tag_check (lto_tree_code_to_tag (code),
 495                      lto_tree_code_to_tag (TREE_CODE (expr)));
 496     }
 497   code = TREE_CODE (expr);
 498
 499   /* Note that all these functions are highly sensitive to changes in
 500      the types and sizes of each of the fields being packed.  */
 501   unpack_ts_base_value_fields (&bp, expr);
 502
 503   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 504     unpack_ts_int_cst_value_fields (&bp, expr);
 505
 506   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 507     unpack_ts_real_cst_value_fields (&bp, expr);
 508
 509   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 510     unpack_ts_fixed_cst_value_fields (&bp, expr);
 511
 512   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 513     stream_input_location (&DECL_SOURCE_LOCATION (expr), &bp, data_in);
 514
 515   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 516     unpack_ts_decl_common_value_fields (&bp, expr);
 517
 518   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 519     unpack_ts_decl_wrtl_value_fields (&bp, expr);
 520
 521   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 522     unpack_ts_decl_with_vis_value_fields (&bp, expr);
 523
 524   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 525     unpack_ts_function_decl_value_fields (&bp, expr);
 526
 527   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 528     unpack_ts_type_common_value_fields (&bp, expr);
 529
 530   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 531     {
 532       stream_input_location (&EXPR_CHECK (expr)->exp.locus, &bp, data_in);
 533       if (code == MEM_REF
 534           || code == TARGET_MEM_REF)
 535         {
 536           MR_DEPENDENCE_CLIQUE (expr)
 537             = (unsigned)bp_unpack_value (&bp, sizeof (short) * 8);
 538           if (MR_DEPENDENCE_CLIQUE (expr) != 0)
 539             MR_DEPENDENCE_BASE (expr)
 540               = (unsigned)bp_unpack_value (&bp, sizeof (short) * 8);
 541         }
 542       else if (code == CALL_EXPR)
 543         CALL_EXPR_IFN (expr) = bp_unpack_enum (&bp, internal_fn, IFN_LAST);
 544     }
 545
 546   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 547     unpack_ts_block_value_fields (data_in, &bp, expr);
 548
 549   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 550     unpack_ts_translation_unit_decl_value_fields (data_in, &bp, expr);
 551
 552   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 553     cl_optimization_stream_in (data_in, &bp, TREE_OPTIMIZATION (expr));
 554
 555   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 556     {
 557       CLOBBER_KIND (expr)
 558         = bp_unpack_enum (&bp, clobber_kind, CLOBBER_LAST);
 559       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (&bp);
 560       if (length > 0)
 561         vec_safe_grow (CONSTRUCTOR_ELTS (expr), length, true);
 562     }
 563
 564 #ifndef ACCEL_COMPILER
 565   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
 566     {
 567       cl_target_option_stream_in (data_in, &bp, TREE_TARGET_OPTION (expr));
 568       if (targetm.target_option.post_stream_in)
 569         targetm.target_option.post_stream_in (TREE_TARGET_OPTION (expr));
 570     }
 571 #endif
 572
 573   if (code == OMP_CLAUSE)
 574     unpack_ts_omp_clause_value_fields (data_in, &bp, expr);
 575 }
 576
 577
 578 /* Materialize a new tree from input block IB using descriptors in
 579    DATA_IN.  The code for the new tree should match TAG.  Store in
 580    *IX_P the index into the reader cache where the new tree is stored.  */
 581
 582 tree
 583 streamer_alloc_tree (class lto_input_block *ib, class data_in *data_in,
 584                      enum LTO_tags tag)
 585 {
 586   enum tree_code code;
 587   tree result;
 588
 589   result = NULL_TREE;
 590
 591   code = lto_tag_to_tree_code (tag);
 592
 593   /* We should never see an SSA_NAME tree.  Only the version numbers of
 594      SSA names are ever written out.  See input_ssa_names.  */
 595   gcc_assert (code != SSA_NAME);
 596
 597   /* Instantiate a new tree using the header data.  */
 598   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
 599     result = streamer_read_string_cst (data_in, ib);
 600   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
 601     result = input_identifier (data_in, ib);
 602   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 603     {
 604       HOST_WIDE_INT len = streamer_read_hwi (ib);
 605       result = make_tree_vec (len);
 606     }
 607   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 608     {
 609       bitpack_d bp = streamer_read_bitpack (ib);
 610       unsigned int log2_npatterns = bp_unpack_value (&bp, 8);
 611       unsigned int nelts_per_pattern = bp_unpack_value (&bp, 8);
 612       result = make_vector (log2_npatterns, nelts_per_pattern);
 613     }
 614   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 615     {
 616       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 617       result = make_tree_binfo (len);
 618     }
 619   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 620     {
 621       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 622       unsigned HOST_WIDE_INT ext_len = streamer_read_uhwi (ib);
 623       result = make_int_cst (len, ext_len);
 624     }
 625   else if (code == CALL_EXPR)
 626     {
 627       unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
 628       return build_vl_exp (CALL_EXPR, nargs + 3);
 629     }
 630   else if (code == OMP_CLAUSE)
 631     {
 632       enum omp_clause_code subcode
 633         = (enum omp_clause_code) streamer_read_uhwi (ib);
 634       return build_omp_clause (UNKNOWN_LOCATION, subcode);
 635     }
 636   else
 637     {
 638       /* For all other nodes, materialize the tree with a raw
 639          make_node call.  */
 640       result = make_node (code);
 641     }
 642
 643   return result;
 644 }
 645
 646
 647 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
 648    block IB.  DATA_IN contains tables and descriptors for the
 649    file being read.  */
 650
 651
 652 static void
 653 lto_input_ts_common_tree_pointers (class lto_input_block *ib,
 654                                    class data_in *data_in, tree expr)
 655 {
 656   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 657     TREE_TYPE (expr) = stream_read_tree_ref (ib, data_in);
 658 }
 659
 660
 661 /* Read all pointer fields in the TS_VECTOR 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_vector_tree_pointers (class lto_input_block *ib,
 667                                    class data_in *data_in, tree expr)
 668 {
 669   unsigned int count = vector_cst_encoded_nelts (expr);
 670   for (unsigned int i = 0; i < count; ++i)
 671     VECTOR_CST_ENCODED_ELT (expr, i) = stream_read_tree_ref (ib, data_in);
 672 }
 673
 674
 675 /* Read all pointer fields in the TS_POLY_INT_CST structure of EXPR from
 676    input block IB.  DATA_IN contains tables and descriptors for the
 677    file being read.  */
 678
 679 static void
 680 lto_input_ts_poly_tree_pointers (class lto_input_block *ib,
 681                                  class data_in *data_in, tree expr)
 682 {
 683   for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i)
 684     POLY_INT_CST_COEFF (expr, i) = stream_read_tree_ref (ib, data_in);
 685 }
 686
 687
 688 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
 689    block IB.  DATA_IN contains tables and descriptors for the
 690    file being read.  */
 691
 692 static void
 693 lto_input_ts_complex_tree_pointers (class lto_input_block *ib,
 694                                     class data_in *data_in, tree expr)
 695 {
 696   TREE_REALPART (expr) = stream_read_tree_ref (ib, data_in);
 697   TREE_IMAGPART (expr) = stream_read_tree_ref (ib, data_in);
 698 }
 699
 700
 701 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 702    from input block IB.  DATA_IN contains tables and descriptors for the
 703    file being read.  */
 704
 705 static void
 706 lto_input_ts_decl_minimal_tree_pointers (class lto_input_block *ib,
 707                                          class data_in *data_in, tree expr)
 708 {
 709   DECL_NAME (expr) = stream_read_tree_ref (ib, data_in);
 710   DECL_CONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 711 }
 712
 713
 714 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
 715    input block IB.  DATA_IN contains tables and descriptors for the
 716    file being read.  */
 717
 718 static void
 719 lto_input_ts_decl_common_tree_pointers (class lto_input_block *ib,
 720                                         class data_in *data_in, tree expr)
 721 {
 722   DECL_SIZE (expr) = stream_read_tree_ref (ib, data_in);
 723   DECL_SIZE_UNIT (expr) = stream_read_tree_ref (ib, data_in);
 724   DECL_ATTRIBUTES (expr) = stream_read_tree_ref (ib, data_in);
 725   DECL_ABSTRACT_ORIGIN (expr) = stream_read_tree_ref (ib, data_in);
 726
 727   if ((VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 728       && DECL_HAS_VALUE_EXPR_P (expr))
 729     SET_DECL_VALUE_EXPR (expr, stream_read_tree_ref (ib, data_in));
 730
 731   if (VAR_P (expr)
 732       && DECL_HAS_DEBUG_EXPR_P (expr))
 733     {
 734       tree dexpr = stream_read_tree_ref (ib, data_in);
 735       if (dexpr)
 736         SET_DECL_DEBUG_EXPR (expr, dexpr);
 737     }
 738 }
 739
 740
 741 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
 742    EXPR 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_non_common_tree_pointers (class lto_input_block *,
 747                                             class data_in *, tree)
 748 {
 749 }
 750
 751
 752 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 753    from input block IB.  DATA_IN contains tables and descriptors for the
 754    file being read.  */
 755
 756 static void
 757 lto_input_ts_decl_with_vis_tree_pointers (class lto_input_block *ib,
 758                                           class data_in *data_in, tree expr)
 759 {
 760   tree id;
 761
 762   id = stream_read_tree_ref (ib, data_in);
 763   if (id)
 764     {
 765       gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
 766       SET_DECL_ASSEMBLER_NAME (expr, id);
 767     }
 768 }
 769
 770
 771 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
 772    input block IB.  DATA_IN contains tables and descriptors for the
 773    file being read.  */
 774
 775 static void
 776 lto_input_ts_field_decl_tree_pointers (class lto_input_block *ib,
 777                                        class data_in *data_in, tree expr)
 778 {
 779   DECL_FIELD_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 780   DECL_BIT_FIELD_TYPE (expr) = stream_read_tree_ref (ib, data_in);
 781   DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree_ref (ib, data_in);
 782   DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 783 }
 784
 785
 786 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 787    from input block IB.  DATA_IN contains tables and descriptors for the
 788    file being read.  */
 789
 790 static void
 791 lto_input_ts_function_decl_tree_pointers (class lto_input_block *ib,
 792                                           class data_in *data_in, tree expr)
 793 {
 794   /* DECL_STRUCT_FUNCTION is loaded on demand by cgraph_get_body.  */
 795   DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree_ref (ib, data_in);
 796 #ifndef ACCEL_COMPILER
 797   DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree_ref (ib, data_in);
 798 #endif
 799   DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr)
 800     = stream_read_tree_ref (ib, data_in);
 801 #ifdef ACCEL_COMPILER
 802   {
 803     tree opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr);
 804     if (opts)
 805       {
 806         struct gcc_options tmp, tmp_set;
 807         init_options_struct (&tmp, NULL);
 808         memset (&tmp_set, 0, sizeof (tmp_set));
 809         cl_optimization_restore (&tmp, &tmp_set, TREE_OPTIMIZATION (opts));
 810         finish_options (&tmp, &tmp_set, UNKNOWN_LOCATION);
 811         opts = build_optimization_node (&tmp, &tmp_set);
 812         DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = opts;
 813       }
 814   }
 815 #endif
 816 }
 817
 818
 819 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
 820    input block IB.  DATA_IN contains tables and descriptors for the file
 821    being read.  */
 822
 823 static void
 824 lto_input_ts_type_common_tree_pointers (class lto_input_block *ib,
 825                                         class data_in *data_in, tree expr)
 826 {
 827   TYPE_SIZE (expr) = stream_read_tree_ref (ib, data_in);
 828   TYPE_SIZE_UNIT (expr) = stream_read_tree_ref (ib, data_in);
 829   TYPE_ATTRIBUTES (expr) = stream_read_tree_ref (ib, data_in);
 830   TYPE_NAME (expr) = stream_read_tree_ref (ib, data_in);
 831   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 832      reconstructed during fixup.  */
 833   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 834      during fixup.  */
 835   TYPE_MAIN_VARIANT (expr) = stream_read_tree_ref (ib, data_in);
 836   TYPE_CONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 837   /* TYPE_CANONICAL gets re-computed during type merging.  */
 838   TYPE_CANONICAL (expr) = NULL_TREE;
 839 }
 840
 841 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 842    from input block IB.  DATA_IN contains tables and descriptors for the
 843    file being read.  */
 844
 845 static void
 846 lto_input_ts_type_non_common_tree_pointers (class lto_input_block *ib,
 847                                             class data_in *data_in,
 848                                             tree expr)
 849 {
 850   if (TREE_CODE (expr) == ARRAY_TYPE)
 851     TYPE_DOMAIN (expr) = stream_read_tree_ref (ib, data_in);
 852   else if (RECORD_OR_UNION_TYPE_P (expr))
 853     TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
 854   else if (FUNC_OR_METHOD_TYPE_P (expr))
 855     TYPE_ARG_TYPES (expr) = stream_read_tree_ref (ib, data_in);
 856
 857   if (!POINTER_TYPE_P (expr))
 858     TYPE_MIN_VALUE_RAW (expr) = stream_read_tree_ref (ib, data_in);
 859   TYPE_MAX_VALUE_RAW (expr) = stream_read_tree_ref (ib, data_in);
 860 }
 861
 862
 863 /* Read all pointer fields in the TS_LIST structure of EXPR from input
 864    block IB.  DATA_IN contains tables and descriptors for the
 865    file being read.  */
 866
 867 static void
 868 lto_input_ts_list_tree_pointers (class lto_input_block *ib,
 869                                  class data_in *data_in, tree expr)
 870 {
 871   TREE_PURPOSE (expr) = stream_read_tree_ref (ib, data_in);
 872   TREE_VALUE (expr) = stream_read_tree_ref (ib, data_in);
 873   TREE_CHAIN (expr) = stream_read_tree_ref (ib, data_in);
 874 }
 875
 876
 877 /* Read all pointer fields in the TS_VEC structure of EXPR from input
 878    block IB.  DATA_IN contains tables and descriptors for the
 879    file being read.  */
 880
 881 static void
 882 lto_input_ts_vec_tree_pointers (class lto_input_block *ib,
 883                                 class data_in *data_in, tree expr)
 884 {
 885   int i;
 886
 887   /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
 888      instantiate EXPR.  */
 889   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 890     TREE_VEC_ELT (expr, i) = stream_read_tree_ref (ib, data_in);
 891 }
 892
 893
 894 /* Read all pointer fields in the TS_EXP structure of EXPR from input
 895    block IB.  DATA_IN contains tables and descriptors for the
 896    file being read.  */
 897
 898
 899 static void
 900 lto_input_ts_exp_tree_pointers (class lto_input_block *ib,
 901                                 class data_in *data_in, tree expr)
 902 {
 903   int i;
 904   tree block;
 905
 906   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 907     TREE_OPERAND (expr, i) = stream_read_tree_ref (ib, data_in);
 908
 909   block = stream_read_tree_ref (ib, data_in);
 910
 911   /* TODO: Block is stored in the locus information.  It may make more sense to
 912      to make it go via the location cache.  */
 913   if (block)
 914     {
 915       data_in->location_cache.apply_location_cache ();
 916       TREE_SET_BLOCK (expr, block);
 917     }
 918 }
 919
 920
 921 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
 922    block IB.  DATA_IN contains tables and descriptors for the
 923    file being read.  */
 924
 925 static void
 926 lto_input_ts_block_tree_pointers (class lto_input_block *ib,
 927                                   class data_in *data_in, tree expr)
 928 {
 929   BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
 930
 931   BLOCK_SUPERCONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 932   BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree_ref (ib, data_in);
 933   /* We may end up prevailing a decl with DECL_ORIGIN (t) != t here
 934      which breaks the invariant that BLOCK_ABSTRACT_ORIGIN is the
 935      ultimate origin.  Fixup here.
 936      ???  This should get fixed with moving to DIE references.  */
 937   if (DECL_P (BLOCK_ORIGIN (expr)))
 938     BLOCK_ABSTRACT_ORIGIN (expr) = DECL_ORIGIN (BLOCK_ABSTRACT_ORIGIN (expr));
 939   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 940      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 941      dwarf2out.cc.  */
 942
 943   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 944      streaming time.  */
 945
 946   /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
 947      of streaming it.  For non-BLOCK BLOCK_SUPERCONTEXTs we still
 948      stream the child relationship explicitly.  */
 949   if (BLOCK_SUPERCONTEXT (expr)
 950       && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
 951     {
 952       BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
 953       BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
 954     }
 955
 956   /* The global block is rooted at the TU decl.  Hook it here to
 957      avoid the need to stream in this block during WPA time.  */
 958   else if (BLOCK_SUPERCONTEXT (expr)
 959            && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
 960     DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
 961
 962   /* The function-level block is connected at the time we read in
 963      function bodies for the same reason.  */
 964 }
 965
 966
 967 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
 968    block IB.  DATA_IN contains tables and descriptors for the
 969    file being read.  */
 970
 971 static void
 972 lto_input_ts_binfo_tree_pointers (class lto_input_block *ib,
 973                                   class data_in *data_in, tree expr)
 974 {
 975   tree t;
 976
 977   /* Note that the number of slots in EXPR was read in
 978      streamer_alloc_tree when instantiating EXPR.  However, the
 979      vector is empty so we cannot rely on vec::length to know how many
 980      elements to read.  So, this list is emitted as a 0-terminated
 981      list on the writer side.  */
 982   do
 983     {
 984       t = stream_read_tree_ref (ib, data_in);
 985       if (t)
 986         BINFO_BASE_BINFOS (expr)->quick_push (t);
 987     }
 988   while (t);
 989
 990   BINFO_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 991   BINFO_VTABLE (expr) = stream_read_tree_ref (ib, data_in);
 992
 993   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX,
 994      BINFO_BASE_ACCESSES and BINFO_VPTR_INDEX; these are used by C++ FE
 995      only.  */
 996 }
 997
 998
 999 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
1000    input block IB.  DATA_IN contains tables and descriptors for the
1001    file being read.  */
1002
1003 static void
1004 lto_input_ts_constructor_tree_pointers (class lto_input_block *ib,
1005                                         class data_in *data_in, tree expr)
1006 {
1007   unsigned i;
1008
1009   for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
1010     {
1011       constructor_elt e;
1012       e.index = stream_read_tree_ref (ib, data_in);
1013       e.value = stream_read_tree_ref (ib, data_in);
1014       (*CONSTRUCTOR_ELTS (expr))[i] = e;
1015     }
1016 }
1017
1018
1019 /* Read all pointer fields in the TS_OMP_CLAUSE structure of EXPR from
1020    input block IB.  DATA_IN contains tables and descriptors for the
1021    file being read.  */
1022
1023 static void
1024 lto_input_ts_omp_clause_tree_pointers (class lto_input_block *ib,
1025                                        class data_in *data_in, tree expr)
1026 {
1027   int i;
1028
1029   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
1030     OMP_CLAUSE_OPERAND (expr, i) = stream_read_tree_ref (ib, data_in);
1031   OMP_CLAUSE_CHAIN (expr) = stream_read_tree_ref (ib, data_in);
1032 }
1033
1034
1035 /* Read all pointer fields in EXPR from input block IB.  DATA_IN
1036    contains tables and descriptors for the file being read.  */
1037
1038 void
1039 streamer_read_tree_body (class lto_input_block *ib, class data_in *data_in,
1040                          tree expr)
1041 {
1042   enum tree_code code;
1043
1044   code = TREE_CODE (expr);
1045
1046   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
1047     lto_input_ts_common_tree_pointers (ib, data_in, expr);
1048
1049   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1050     lto_input_ts_vector_tree_pointers (ib, data_in, expr);
1051
1052   if (CODE_CONTAINS_STRUCT (code, TS_POLY_INT_CST))
1053     lto_input_ts_poly_tree_pointers (ib, data_in, expr);
1054
1055   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1056     lto_input_ts_complex_tree_pointers (ib, data_in, expr);
1057
1058   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1059     lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
1060
1061   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1062     lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
1063
1064   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1065     lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
1066
1067   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1068     lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
1069
1070   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1071     lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
1072
1073   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1074     lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1075
1076   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1077     lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1078
1079   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1080     lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1081
1082   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1083     lto_input_ts_list_tree_pointers (ib, data_in, expr);
1084
1085   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1086     lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1087
1088   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1089     lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1090
1091   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1092     lto_input_ts_block_tree_pointers (ib, data_in, expr);
1093
1094   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1095     lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1096
1097   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1098     lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1099
1100   if (code == OMP_CLAUSE)
1101     lto_input_ts_omp_clause_tree_pointers (ib, data_in, expr);
1102 }
1103
1104
1105 /* Read an index IX from input block IB and return the tree node at
1106    DATA_IN->FILE_DATA->GLOBALS_INDEX[IX].  */
1107
1108 tree
1109 streamer_get_pickled_tree (class lto_input_block *ib, class data_in *data_in)
1110 {
1111   unsigned HOST_WIDE_INT ix;
1112   tree result;
1113   enum LTO_tags expected_tag;
1114
1115   ix = streamer_read_uhwi (ib);
1116   result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1117
1118   if (streamer_debugging)
1119     {
1120       expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1121       gcc_assert (result
1122                   && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1123     }
1124
1125   return result;
1126 }