gcc/tree-streamer-in.cc

   1 /* Routines for reading trees from a file stream.
   2
   3    Copyright (C) 2011-2022 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   unsigned i;
 192   REAL_VALUE_TYPE r;
 193
 194   /* Clear all bits of the real value type so that we can later do
 195      bitwise comparisons to see if two values are the same.  */
 196   memset (&r, 0, sizeof r);
 197   r.cl = (unsigned) bp_unpack_value (bp, 2);
 198   r.decimal = (unsigned) bp_unpack_value (bp, 1);
 199   r.sign = (unsigned) bp_unpack_value (bp, 1);
 200   r.signalling = (unsigned) bp_unpack_value (bp, 1);
 201   r.canonical = (unsigned) bp_unpack_value (bp, 1);
 202   r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
 203   for (i = 0; i < SIGSZ; i++)
 204     r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
 205
 206   memcpy (TREE_REAL_CST_PTR (expr), &r, sizeof (REAL_VALUE_TYPE));
 207 }
 208
 209
 210 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
 211    expression EXPR from bitpack BP.  */
 212
 213 static void
 214 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 215 {
 216   FIXED_VALUE_TYPE *fp = ggc_alloc<fixed_value> ();
 217   fp->mode = as_a <scalar_mode> (bp_unpack_machine_mode (bp));
 218   fp->data.low = bp_unpack_var_len_int (bp);
 219   fp->data.high = bp_unpack_var_len_int (bp);
 220   TREE_FIXED_CST_PTR (expr) = fp;
 221 }
 222
 223 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
 224    of expression EXPR from bitpack BP.  */
 225
 226 static void
 227 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 228 {
 229   SET_DECL_MODE (expr, bp_unpack_machine_mode (bp));
 230   DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 231   DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 232   DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 233   DECL_ABSTRACT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 234   DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 235   DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 236   DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 237   DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 238   DECL_NOT_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 239   SET_DECL_ALIGN (expr, (unsigned) bp_unpack_var_len_unsigned (bp));
 240 #ifdef ACCEL_COMPILER
 241   if (DECL_ALIGN (expr) > targetm.absolute_biggest_alignment)
 242     SET_DECL_ALIGN (expr, targetm.absolute_biggest_alignment);
 243 #endif
 244   if (TREE_CODE (expr) == LABEL_DECL)
 245     {
 246       EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
 247
 248       /* Always assume an initial value of -1 for LABEL_DECL_UID to
 249          force gimple_set_bb to recreate label_to_block_map.  */
 250       LABEL_DECL_UID (expr) = -1;
 251     }
 252
 253   else if (TREE_CODE (expr) == FIELD_DECL)
 254     {
 255       DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 256       DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 257       DECL_PADDING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 258       unsigned val = (unsigned) bp_unpack_value (bp, 1);
 259       if (DECL_BIT_FIELD (expr))
 260         SET_DECL_FIELD_CXX_ZERO_WIDTH_BIT_FIELD (expr, val);
 261       else
 262         SET_DECL_FIELD_ABI_IGNORED (expr, val);
 263       expr->decl_common.off_align = bp_unpack_value (bp, 8);
 264     }
 265
 266   else if (VAR_P (expr))
 267     {
 268       DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 269       DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
 270     }
 271
 272   else if (TREE_CODE (expr) == PARM_DECL)
 273     DECL_HIDDEN_STRING_LENGTH (expr) = (unsigned) bp_unpack_value (bp, 1);
 274
 275   if (TREE_CODE (expr) == RESULT_DECL
 276       || TREE_CODE (expr) == PARM_DECL
 277       || VAR_P (expr))
 278     {
 279       DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
 280       if (VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 281         DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 282     }
 283 }
 284
 285
 286 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
 287    of expression EXPR from bitpack BP.  */
 288
 289 static void
 290 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 291 {
 292   DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 293 }
 294
 295
 296 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 297    of expression EXPR from bitpack BP.  */
 298
 299 static void
 300 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 301 {
 302   DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
 303   DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 304   DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
 305   DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp,  1);
 306   DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp,  1);
 307   DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp,  2);
 308   DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp,  1);
 309
 310   if (VAR_P (expr))
 311     {
 312       DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 313       DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
 314     }
 315
 316   if (TREE_CODE (expr) == FUNCTION_DECL)
 317     {
 318       DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 319       DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 320       DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 321     }
 322 }
 323
 324
 325 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
 326    of expression EXPR from bitpack BP.  */
 327
 328 static void
 329 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 330 {
 331   built_in_class cl = bp_unpack_enum (bp, built_in_class, BUILT_IN_LAST);
 332   DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 333   DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 334   DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 335   DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
 336   DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
 337   DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
 338   DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
 339   FUNCTION_DECL_DECL_TYPE (expr) = (function_decl_type) bp_unpack_value (bp, 2);
 340   DECL_SET_IS_OPERATOR_DELETE (expr, (unsigned) bp_unpack_value (bp, 1));
 341   DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 342   DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
 343   DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 344   DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
 345                         = (unsigned) bp_unpack_value (bp, 1);
 346   DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
 347   DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
 348   DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 349   DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 350   DECL_IS_REPLACEABLE_OPERATOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 351   unsigned int fcode = 0;
 352   if (cl != NOT_BUILT_IN)
 353     {
 354       fcode = bp_unpack_value (bp, 32);
 355       if (cl == BUILT_IN_NORMAL && fcode >= END_BUILTINS)
 356         fatal_error (input_location,
 357                      "machine independent builtin code out of range");
 358       else if (cl == BUILT_IN_MD)
 359         {
 360           tree result = targetm.builtin_decl (fcode, true);
 361           if (!result || result == error_mark_node)
 362             fatal_error (input_location,
 363                          "target specific builtin not available");
 364         }
 365     }
 366   set_decl_built_in_function (expr, cl, fcode);
 367 }
 368
 369
 370 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
 371    of expression EXPR from bitpack BP.  */
 372
 373 static void
 374 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 375 {
 376   machine_mode mode;
 377
 378   mode = bp_unpack_machine_mode (bp);
 379   SET_TYPE_MODE (expr, mode);
 380   /* TYPE_NO_FORCE_BLK is private to stor-layout and need
 381      no streaming.  */
 382   TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 383   TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
 384   TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 385   TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 386   TYPE_LANG_FLAG_0 (expr) = (unsigned) bp_unpack_value (bp, 1);
 387   if (RECORD_OR_UNION_TYPE_P (expr))
 388     {
 389       TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
 390       TYPE_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 391       TYPE_CXX_ODR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 392     }
 393   else if (TREE_CODE (expr) == ARRAY_TYPE)
 394     TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
 395   if (TREE_CODE (expr) == ARRAY_TYPE || TREE_CODE (expr) == INTEGER_TYPE)
 396     TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
 397   if (AGGREGATE_TYPE_P (expr))
 398     TYPE_TYPELESS_STORAGE (expr) = (unsigned) bp_unpack_value (bp, 1);
 399   TYPE_EMPTY_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 400   TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
 401   SET_TYPE_ALIGN (expr, bp_unpack_var_len_unsigned (bp));
 402 #ifdef ACCEL_COMPILER
 403   if (TYPE_ALIGN (expr) > targetm.absolute_biggest_alignment)
 404     SET_TYPE_ALIGN (expr, targetm.absolute_biggest_alignment);
 405 #endif
 406 }
 407
 408
 409 /* Unpack all the non-pointer fields of the TS_BLOCK structure
 410    of expression EXPR from bitpack BP.  */
 411
 412 static void
 413 unpack_ts_block_value_fields (class data_in *data_in,
 414                               struct bitpack_d *bp, tree expr)
 415 {
 416   /* BLOCK_NUMBER is recomputed.  */
 417   stream_input_location (&BLOCK_SOURCE_LOCATION (expr), bp, data_in);
 418 }
 419
 420 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
 421    structure of expression EXPR from bitpack BP.  */
 422
 423 static void
 424 unpack_ts_translation_unit_decl_value_fields (class data_in *data_in,
 425                                               struct bitpack_d *bp, tree expr)
 426 {
 427   TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
 428   vec_safe_push (all_translation_units, expr);
 429 }
 430
 431
 432 /* Unpack all the non-pointer fields of the TS_OMP_CLAUSE
 433    structure of expression EXPR from bitpack BP.  */
 434
 435 static void
 436 unpack_ts_omp_clause_value_fields (class data_in *data_in,
 437                                    struct bitpack_d *bp, tree expr)
 438 {
 439   stream_input_location (&OMP_CLAUSE_LOCATION (expr), bp, data_in);
 440   switch (OMP_CLAUSE_CODE (expr))
 441     {
 442     case OMP_CLAUSE_DEFAULT:
 443       OMP_CLAUSE_DEFAULT_KIND (expr)
 444         = bp_unpack_enum (bp, omp_clause_default_kind,
 445                           OMP_CLAUSE_DEFAULT_LAST);
 446       break;
 447     case OMP_CLAUSE_SCHEDULE:
 448       OMP_CLAUSE_SCHEDULE_KIND (expr)
 449         = bp_unpack_enum (bp, omp_clause_schedule_kind,
 450                           OMP_CLAUSE_SCHEDULE_LAST);
 451       break;
 452     case OMP_CLAUSE_DEPEND:
 453       OMP_CLAUSE_DEPEND_KIND (expr)
 454         = bp_unpack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST);
 455       break;
 456     case OMP_CLAUSE_MAP:
 457       OMP_CLAUSE_SET_MAP_KIND (expr, bp_unpack_enum (bp, gomp_map_kind,
 458                                                      GOMP_MAP_LAST));
 459       break;
 460     case OMP_CLAUSE_PROC_BIND:
 461       OMP_CLAUSE_PROC_BIND_KIND (expr)
 462         = bp_unpack_enum (bp, omp_clause_proc_bind_kind,
 463                           OMP_CLAUSE_PROC_BIND_LAST);
 464       break;
 465     case OMP_CLAUSE_REDUCTION:
 466     case OMP_CLAUSE_TASK_REDUCTION:
 467     case OMP_CLAUSE_IN_REDUCTION:
 468       OMP_CLAUSE_REDUCTION_CODE (expr)
 469         = bp_unpack_enum (bp, tree_code, MAX_TREE_CODES);
 470       break;
 471     default:
 472       break;
 473     }
 474 }
 475
 476
 477 /* Read all the language-independent bitfield values for EXPR from IB.
 478    Return the partially unpacked bitpack so the caller can unpack any other
 479    bitfield values that the writer may have written.  */
 480
 481 void
 482 streamer_read_tree_bitfields (class lto_input_block *ib,
 483                               class data_in *data_in, tree expr)
 484 {
 485   enum tree_code code;
 486   struct bitpack_d bp;
 487
 488   /* Read the bitpack of non-pointer values from IB.  */
 489   bp = streamer_read_bitpack (ib);
 490
 491   /* The first word in BP contains the code of the tree that we
 492      are about to read.  */
 493   if (streamer_debugging)
 494     {
 495       code = (enum tree_code) bp_unpack_value (&bp, 16);
 496       lto_tag_check (lto_tree_code_to_tag (code),
 497                      lto_tree_code_to_tag (TREE_CODE (expr)));
 498     }
 499   code = TREE_CODE (expr);
 500
 501   /* Note that all these functions are highly sensitive to changes in
 502      the types and sizes of each of the fields being packed.  */
 503   unpack_ts_base_value_fields (&bp, expr);
 504
 505   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 506     unpack_ts_int_cst_value_fields (&bp, expr);
 507
 508   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 509     unpack_ts_real_cst_value_fields (&bp, expr);
 510
 511   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 512     unpack_ts_fixed_cst_value_fields (&bp, expr);
 513
 514   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 515     stream_input_location (&DECL_SOURCE_LOCATION (expr), &bp, data_in);
 516
 517   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 518     unpack_ts_decl_common_value_fields (&bp, expr);
 519
 520   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 521     unpack_ts_decl_wrtl_value_fields (&bp, expr);
 522
 523   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 524     unpack_ts_decl_with_vis_value_fields (&bp, expr);
 525
 526   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 527     unpack_ts_function_decl_value_fields (&bp, expr);
 528
 529   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 530     unpack_ts_type_common_value_fields (&bp, expr);
 531
 532   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 533     {
 534       stream_input_location (&EXPR_CHECK (expr)->exp.locus, &bp, data_in);
 535       if (code == MEM_REF
 536           || code == TARGET_MEM_REF)
 537         {
 538           MR_DEPENDENCE_CLIQUE (expr)
 539             = (unsigned)bp_unpack_value (&bp, sizeof (short) * 8);
 540           if (MR_DEPENDENCE_CLIQUE (expr) != 0)
 541             MR_DEPENDENCE_BASE (expr)
 542               = (unsigned)bp_unpack_value (&bp, sizeof (short) * 8);
 543         }
 544       else if (code == CALL_EXPR)
 545         CALL_EXPR_IFN (expr) = bp_unpack_enum (&bp, internal_fn, IFN_LAST);
 546     }
 547
 548   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 549     unpack_ts_block_value_fields (data_in, &bp, expr);
 550
 551   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 552     unpack_ts_translation_unit_decl_value_fields (data_in, &bp, expr);
 553
 554   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 555     cl_optimization_stream_in (data_in, &bp, TREE_OPTIMIZATION (expr));
 556
 557   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 558     {
 559       CLOBBER_KIND (expr)
 560         = bp_unpack_enum (&bp, clobber_kind, CLOBBER_LAST);
 561       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (&bp);
 562       if (length > 0)
 563         vec_safe_grow (CONSTRUCTOR_ELTS (expr), length, true);
 564     }
 565
 566 #ifndef ACCEL_COMPILER
 567   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
 568     {
 569       cl_target_option_stream_in (data_in, &bp, TREE_TARGET_OPTION (expr));
 570       if (targetm.target_option.post_stream_in)
 571         targetm.target_option.post_stream_in (TREE_TARGET_OPTION (expr));
 572     }
 573 #endif
 574
 575   if (code == OMP_CLAUSE)
 576     unpack_ts_omp_clause_value_fields (data_in, &bp, expr);
 577 }
 578
 579
 580 /* Materialize a new tree from input block IB using descriptors in
 581    DATA_IN.  The code for the new tree should match TAG.  Store in
 582    *IX_P the index into the reader cache where the new tree is stored.  */
 583
 584 tree
 585 streamer_alloc_tree (class lto_input_block *ib, class data_in *data_in,
 586                      enum LTO_tags tag)
 587 {
 588   enum tree_code code;
 589   tree result;
 590
 591   result = NULL_TREE;
 592
 593   code = lto_tag_to_tree_code (tag);
 594
 595   /* We should never see an SSA_NAME tree.  Only the version numbers of
 596      SSA names are ever written out.  See input_ssa_names.  */
 597   gcc_assert (code != SSA_NAME);
 598
 599   /* Instantiate a new tree using the header data.  */
 600   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
 601     result = streamer_read_string_cst (data_in, ib);
 602   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
 603     result = input_identifier (data_in, ib);
 604   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 605     {
 606       HOST_WIDE_INT len = streamer_read_hwi (ib);
 607       result = make_tree_vec (len);
 608     }
 609   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 610     {
 611       bitpack_d bp = streamer_read_bitpack (ib);
 612       unsigned int log2_npatterns = bp_unpack_value (&bp, 8);
 613       unsigned int nelts_per_pattern = bp_unpack_value (&bp, 8);
 614       result = make_vector (log2_npatterns, nelts_per_pattern);
 615     }
 616   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 617     {
 618       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 619       result = make_tree_binfo (len);
 620     }
 621   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 622     {
 623       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 624       unsigned HOST_WIDE_INT ext_len = streamer_read_uhwi (ib);
 625       result = make_int_cst (len, ext_len);
 626     }
 627   else if (code == CALL_EXPR)
 628     {
 629       unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
 630       return build_vl_exp (CALL_EXPR, nargs + 3);
 631     }
 632   else if (code == OMP_CLAUSE)
 633     {
 634       enum omp_clause_code subcode
 635         = (enum omp_clause_code) streamer_read_uhwi (ib);
 636       return build_omp_clause (UNKNOWN_LOCATION, subcode);
 637     }
 638   else
 639     {
 640       /* For all other nodes, materialize the tree with a raw
 641          make_node call.  */
 642       result = make_node (code);
 643     }
 644
 645   return result;
 646 }
 647
 648
 649 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
 650    block IB.  DATA_IN contains tables and descriptors for the
 651    file being read.  */
 652
 653
 654 static void
 655 lto_input_ts_common_tree_pointers (class lto_input_block *ib,
 656                                    class data_in *data_in, tree expr)
 657 {
 658   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 659     TREE_TYPE (expr) = stream_read_tree_ref (ib, data_in);
 660 }
 661
 662
 663 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
 664    block IB.  DATA_IN contains tables and descriptors for the
 665    file being read.  */
 666
 667 static void
 668 lto_input_ts_vector_tree_pointers (class lto_input_block *ib,
 669                                    class data_in *data_in, tree expr)
 670 {
 671   unsigned int count = vector_cst_encoded_nelts (expr);
 672   for (unsigned int i = 0; i < count; ++i)
 673     VECTOR_CST_ENCODED_ELT (expr, i) = stream_read_tree_ref (ib, data_in);
 674 }
 675
 676
 677 /* Read all pointer fields in the TS_POLY_INT_CST structure of EXPR from
 678    input block IB.  DATA_IN contains tables and descriptors for the
 679    file being read.  */
 680
 681 static void
 682 lto_input_ts_poly_tree_pointers (class lto_input_block *ib,
 683                                  class data_in *data_in, tree expr)
 684 {
 685   for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i)
 686     POLY_INT_CST_COEFF (expr, i) = stream_read_tree_ref (ib, data_in);
 687 }
 688
 689
 690 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
 691    block IB.  DATA_IN contains tables and descriptors for the
 692    file being read.  */
 693
 694 static void
 695 lto_input_ts_complex_tree_pointers (class lto_input_block *ib,
 696                                     class data_in *data_in, tree expr)
 697 {
 698   TREE_REALPART (expr) = stream_read_tree_ref (ib, data_in);
 699   TREE_IMAGPART (expr) = stream_read_tree_ref (ib, data_in);
 700 }
 701
 702
 703 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 704    from input block IB.  DATA_IN contains tables and descriptors for the
 705    file being read.  */
 706
 707 static void
 708 lto_input_ts_decl_minimal_tree_pointers (class lto_input_block *ib,
 709                                          class data_in *data_in, tree expr)
 710 {
 711   DECL_NAME (expr) = stream_read_tree_ref (ib, data_in);
 712   DECL_CONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 713 }
 714
 715
 716 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
 717    input block IB.  DATA_IN contains tables and descriptors for the
 718    file being read.  */
 719
 720 static void
 721 lto_input_ts_decl_common_tree_pointers (class lto_input_block *ib,
 722                                         class data_in *data_in, tree expr)
 723 {
 724   DECL_SIZE (expr) = stream_read_tree_ref (ib, data_in);
 725   DECL_SIZE_UNIT (expr) = stream_read_tree_ref (ib, data_in);
 726   DECL_ATTRIBUTES (expr) = stream_read_tree_ref (ib, data_in);
 727   DECL_ABSTRACT_ORIGIN (expr) = stream_read_tree_ref (ib, data_in);
 728
 729   if ((VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 730       && DECL_HAS_VALUE_EXPR_P (expr))
 731     SET_DECL_VALUE_EXPR (expr, stream_read_tree_ref (ib, data_in));
 732
 733   if (VAR_P (expr)
 734       && DECL_HAS_DEBUG_EXPR_P (expr))
 735     {
 736       tree dexpr = stream_read_tree_ref (ib, data_in);
 737       if (dexpr)
 738         SET_DECL_DEBUG_EXPR (expr, dexpr);
 739     }
 740 }
 741
 742
 743 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
 744    EXPR from input block IB.  DATA_IN contains tables and descriptors for the
 745    file being read.  */
 746
 747 static void
 748 lto_input_ts_decl_non_common_tree_pointers (class lto_input_block *,
 749                                             class data_in *, tree)
 750 {
 751 }
 752
 753
 754 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 755    from input block IB.  DATA_IN contains tables and descriptors for the
 756    file being read.  */
 757
 758 static void
 759 lto_input_ts_decl_with_vis_tree_pointers (class lto_input_block *ib,
 760                                           class data_in *data_in, tree expr)
 761 {
 762   tree id;
 763
 764   id = stream_read_tree_ref (ib, data_in);
 765   if (id)
 766     {
 767       gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
 768       SET_DECL_ASSEMBLER_NAME (expr, id);
 769     }
 770 }
 771
 772
 773 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
 774    input block IB.  DATA_IN contains tables and descriptors for the
 775    file being read.  */
 776
 777 static void
 778 lto_input_ts_field_decl_tree_pointers (class lto_input_block *ib,
 779                                        class data_in *data_in, tree expr)
 780 {
 781   DECL_FIELD_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 782   DECL_BIT_FIELD_TYPE (expr) = stream_read_tree_ref (ib, data_in);
 783   DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree_ref (ib, data_in);
 784   DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 785 }
 786
 787
 788 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 789    from input block IB.  DATA_IN contains tables and descriptors for the
 790    file being read.  */
 791
 792 static void
 793 lto_input_ts_function_decl_tree_pointers (class lto_input_block *ib,
 794                                           class data_in *data_in, tree expr)
 795 {
 796   /* DECL_STRUCT_FUNCTION is loaded on demand by cgraph_get_body.  */
 797   DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree_ref (ib, data_in);
 798 #ifndef ACCEL_COMPILER
 799   DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree_ref (ib, data_in);
 800 #endif
 801   DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr)
 802     = stream_read_tree_ref (ib, data_in);
 803 #ifdef ACCEL_COMPILER
 804   {
 805     tree opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr);
 806     if (opts)
 807       {
 808         struct gcc_options tmp, tmp_set;
 809         init_options_struct (&tmp, NULL);
 810         memset (&tmp_set, 0, sizeof (tmp_set));
 811         cl_optimization_restore (&tmp, &tmp_set, TREE_OPTIMIZATION (opts));
 812         finish_options (&tmp, &tmp_set, UNKNOWN_LOCATION);
 813         opts = build_optimization_node (&tmp, &tmp_set);
 814         DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = opts;
 815       }
 816   }
 817 #endif
 818 }
 819
 820
 821 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
 822    input block IB.  DATA_IN contains tables and descriptors for the file
 823    being read.  */
 824
 825 static void
 826 lto_input_ts_type_common_tree_pointers (class lto_input_block *ib,
 827                                         class data_in *data_in, tree expr)
 828 {
 829   TYPE_SIZE (expr) = stream_read_tree_ref (ib, data_in);
 830   TYPE_SIZE_UNIT (expr) = stream_read_tree_ref (ib, data_in);
 831   TYPE_ATTRIBUTES (expr) = stream_read_tree_ref (ib, data_in);
 832   TYPE_NAME (expr) = stream_read_tree_ref (ib, data_in);
 833   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 834      reconstructed during fixup.  */
 835   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 836      during fixup.  */
 837   TYPE_MAIN_VARIANT (expr) = stream_read_tree_ref (ib, data_in);
 838   TYPE_CONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 839   /* TYPE_CANONICAL gets re-computed during type merging.  */
 840   TYPE_CANONICAL (expr) = NULL_TREE;
 841 }
 842
 843 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 844    from input block IB.  DATA_IN contains tables and descriptors for the
 845    file being read.  */
 846
 847 static void
 848 lto_input_ts_type_non_common_tree_pointers (class lto_input_block *ib,
 849                                             class data_in *data_in,
 850                                             tree expr)
 851 {
 852   if (TREE_CODE (expr) == ARRAY_TYPE)
 853     TYPE_DOMAIN (expr) = stream_read_tree_ref (ib, data_in);
 854   else if (RECORD_OR_UNION_TYPE_P (expr))
 855     TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
 856   else if (TREE_CODE (expr) == FUNCTION_TYPE
 857            || TREE_CODE (expr) == METHOD_TYPE)
 858     TYPE_ARG_TYPES (expr) = stream_read_tree_ref (ib, data_in);
 859
 860   if (!POINTER_TYPE_P (expr))
 861     TYPE_MIN_VALUE_RAW (expr) = stream_read_tree_ref (ib, data_in);
 862   TYPE_MAX_VALUE_RAW (expr) = stream_read_tree_ref (ib, data_in);
 863 }
 864
 865
 866 /* Read all pointer fields in the TS_LIST structure of EXPR from input
 867    block IB.  DATA_IN contains tables and descriptors for the
 868    file being read.  */
 869
 870 static void
 871 lto_input_ts_list_tree_pointers (class lto_input_block *ib,
 872                                  class data_in *data_in, tree expr)
 873 {
 874   TREE_PURPOSE (expr) = stream_read_tree_ref (ib, data_in);
 875   TREE_VALUE (expr) = stream_read_tree_ref (ib, data_in);
 876   TREE_CHAIN (expr) = stream_read_tree_ref (ib, data_in);
 877 }
 878
 879
 880 /* Read all pointer fields in the TS_VEC structure of EXPR from input
 881    block IB.  DATA_IN contains tables and descriptors for the
 882    file being read.  */
 883
 884 static void
 885 lto_input_ts_vec_tree_pointers (class lto_input_block *ib,
 886                                 class data_in *data_in, tree expr)
 887 {
 888   int i;
 889
 890   /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
 891      instantiate EXPR.  */
 892   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 893     TREE_VEC_ELT (expr, i) = stream_read_tree_ref (ib, data_in);
 894 }
 895
 896
 897 /* Read all pointer fields in the TS_EXP structure of EXPR from input
 898    block IB.  DATA_IN contains tables and descriptors for the
 899    file being read.  */
 900
 901
 902 static void
 903 lto_input_ts_exp_tree_pointers (class lto_input_block *ib,
 904                                 class data_in *data_in, tree expr)
 905 {
 906   int i;
 907   tree block;
 908
 909   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 910     TREE_OPERAND (expr, i) = stream_read_tree_ref (ib, data_in);
 911
 912   block = stream_read_tree_ref (ib, data_in);
 913
 914   /* TODO: Block is stored in the locus information.  It may make more sense to
 915      to make it go via the location cache.  */
 916   if (block)
 917     {
 918       data_in->location_cache.apply_location_cache ();
 919       TREE_SET_BLOCK (expr, block);
 920     }
 921 }
 922
 923
 924 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
 925    block IB.  DATA_IN contains tables and descriptors for the
 926    file being read.  */
 927
 928 static void
 929 lto_input_ts_block_tree_pointers (class lto_input_block *ib,
 930                                   class data_in *data_in, tree expr)
 931 {
 932   BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
 933
 934   BLOCK_SUPERCONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 935   BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree_ref (ib, data_in);
 936   /* We may end up prevailing a decl with DECL_ORIGIN (t) != t here
 937      which breaks the invariant that BLOCK_ABSTRACT_ORIGIN is the
 938      ultimate origin.  Fixup here.
 939      ???  This should get fixed with moving to DIE references.  */
 940   if (DECL_P (BLOCK_ORIGIN (expr)))
 941     BLOCK_ABSTRACT_ORIGIN (expr) = DECL_ORIGIN (BLOCK_ABSTRACT_ORIGIN (expr));
 942   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 943      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 944      dwarf2out.cc.  */
 945
 946   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 947      streaming time.  */
 948
 949   /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
 950      of streaming it.  For non-BLOCK BLOCK_SUPERCONTEXTs we still
 951      stream the child relationship explicitly.  */
 952   if (BLOCK_SUPERCONTEXT (expr)
 953       && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
 954     {
 955       BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
 956       BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
 957     }
 958
 959   /* The global block is rooted at the TU decl.  Hook it here to
 960      avoid the need to stream in this block during WPA time.  */
 961   else if (BLOCK_SUPERCONTEXT (expr)
 962            && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
 963     DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
 964
 965   /* The function-level block is connected at the time we read in
 966      function bodies for the same reason.  */
 967 }
 968
 969
 970 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
 971    block IB.  DATA_IN contains tables and descriptors for the
 972    file being read.  */
 973
 974 static void
 975 lto_input_ts_binfo_tree_pointers (class lto_input_block *ib,
 976                                   class data_in *data_in, tree expr)
 977 {
 978   tree t;
 979
 980   /* Note that the number of slots in EXPR was read in
 981      streamer_alloc_tree when instantiating EXPR.  However, the
 982      vector is empty so we cannot rely on vec::length to know how many
 983      elements to read.  So, this list is emitted as a 0-terminated
 984      list on the writer side.  */
 985   do
 986     {
 987       t = stream_read_tree_ref (ib, data_in);
 988       if (t)
 989         BINFO_BASE_BINFOS (expr)->quick_push (t);
 990     }
 991   while (t);
 992
 993   BINFO_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 994   BINFO_VTABLE (expr) = stream_read_tree_ref (ib, data_in);
 995
 996   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX,
 997      BINFO_BASE_ACCESSES and BINFO_VPTR_INDEX; these are used by C++ FE
 998      only.  */
 999 }
1000
1001
1002 /* Read all pointer fields in the TS_CONSTRUCTOR 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_constructor_tree_pointers (class lto_input_block *ib,
1008                                         class data_in *data_in, tree expr)
1009 {
1010   unsigned i;
1011
1012   for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
1013     {
1014       constructor_elt e;
1015       e.index = stream_read_tree_ref (ib, data_in);
1016       e.value = stream_read_tree_ref (ib, data_in);
1017       (*CONSTRUCTOR_ELTS (expr))[i] = e;
1018     }
1019 }
1020
1021
1022 /* Read all pointer fields in the TS_OMP_CLAUSE structure of EXPR from
1023    input block IB.  DATA_IN contains tables and descriptors for the
1024    file being read.  */
1025
1026 static void
1027 lto_input_ts_omp_clause_tree_pointers (class lto_input_block *ib,
1028                                        class data_in *data_in, tree expr)
1029 {
1030   int i;
1031
1032   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
1033     OMP_CLAUSE_OPERAND (expr, i) = stream_read_tree_ref (ib, data_in);
1034   OMP_CLAUSE_CHAIN (expr) = stream_read_tree_ref (ib, data_in);
1035 }
1036
1037
1038 /* Read all pointer fields in EXPR from input block IB.  DATA_IN
1039    contains tables and descriptors for the file being read.  */
1040
1041 void
1042 streamer_read_tree_body (class lto_input_block *ib, class data_in *data_in,
1043                          tree expr)
1044 {
1045   enum tree_code code;
1046
1047   code = TREE_CODE (expr);
1048
1049   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
1050     lto_input_ts_common_tree_pointers (ib, data_in, expr);
1051
1052   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1053     lto_input_ts_vector_tree_pointers (ib, data_in, expr);
1054
1055   if (CODE_CONTAINS_STRUCT (code, TS_POLY_INT_CST))
1056     lto_input_ts_poly_tree_pointers (ib, data_in, expr);
1057
1058   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1059     lto_input_ts_complex_tree_pointers (ib, data_in, expr);
1060
1061   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1062     lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
1063
1064   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1065     lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
1066
1067   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1068     lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
1069
1070   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1071     lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
1072
1073   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1074     lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
1075
1076   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1077     lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1078
1079   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1080     lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1081
1082   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1083     lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1084
1085   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1086     lto_input_ts_list_tree_pointers (ib, data_in, expr);
1087
1088   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1089     lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1090
1091   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1092     lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1093
1094   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1095     lto_input_ts_block_tree_pointers (ib, data_in, expr);
1096
1097   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1098     lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1099
1100   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1101     lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1102
1103   if (code == OMP_CLAUSE)
1104     lto_input_ts_omp_clause_tree_pointers (ib, data_in, expr);
1105 }
1106
1107
1108 /* Read an index IX from input block IB and return the tree node at
1109    DATA_IN->FILE_DATA->GLOBALS_INDEX[IX].  */
1110
1111 tree
1112 streamer_get_pickled_tree (class lto_input_block *ib, class data_in *data_in)
1113 {
1114   unsigned HOST_WIDE_INT ix;
1115   tree result;
1116   enum LTO_tags expected_tag;
1117
1118   ix = streamer_read_uhwi (ib);
1119   result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1120
1121   if (streamer_debugging)
1122     {
1123       expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1124       gcc_assert (result
1125                   && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1126     }
1127
1128   return result;
1129 }