gcc/tree-streamer-in.c

   1 /* Routines for reading trees from a file stream.
   2
   3    Copyright (C) 2011-2019 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 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 (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       TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
 150     }
 151   else if (TREE_CODE (expr) == BIT_FIELD_REF || TREE_CODE (expr) == MEM_REF)
 152     {
 153       REF_REVERSE_STORAGE_ORDER (expr) = (unsigned) bp_unpack_value (bp, 1);
 154       bp_unpack_value (bp, 8);
 155     }
 156   else if (TREE_CODE (expr) == SSA_NAME)
 157     {
 158       SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
 159       bp_unpack_value (bp, 8);
 160     }
 161   else if (TREE_CODE (expr) == CALL_EXPR)
 162     {
 163       CALL_EXPR_BY_DESCRIPTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 164       bp_unpack_value (bp, 8);
 165     }
 166   else
 167     bp_unpack_value (bp, 9);
 168 }
 169
 170
 171 /* Unpack all the non-pointer fields of the TS_INT_CST structure of
 172    expression EXPR from bitpack BP.  */
 173
 174 static void
 175 unpack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
 176 {
 177   int i;
 178   for (i = 0; i < TREE_INT_CST_EXT_NUNITS (expr); i++)
 179     TREE_INT_CST_ELT (expr, i) = bp_unpack_var_len_int (bp);
 180 }
 181
 182
 183 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of
 184    expression EXPR from bitpack BP.  */
 185
 186 static void
 187 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
 188 {
 189   unsigned i;
 190   REAL_VALUE_TYPE r;
 191   REAL_VALUE_TYPE *rp;
 192
 193   /* Clear all bits of the real value type so that we can later do
 194      bitwise comparisons to see if two values are the same.  */
 195   memset (&r, 0, sizeof r);
 196   r.cl = (unsigned) bp_unpack_value (bp, 2);
 197   r.decimal = (unsigned) bp_unpack_value (bp, 1);
 198   r.sign = (unsigned) bp_unpack_value (bp, 1);
 199   r.signalling = (unsigned) bp_unpack_value (bp, 1);
 200   r.canonical = (unsigned) bp_unpack_value (bp, 1);
 201   r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
 202   for (i = 0; i < SIGSZ; i++)
 203     r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
 204
 205   rp = ggc_alloc<real_value> ();
 206   memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
 207   TREE_REAL_CST_PTR (expr) = rp;
 208 }
 209
 210
 211 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
 212    expression EXPR from bitpack BP.  */
 213
 214 static void
 215 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 216 {
 217   FIXED_VALUE_TYPE *fp = ggc_alloc<fixed_value> ();
 218   fp->mode = as_a <scalar_mode> (bp_unpack_machine_mode (bp));
 219   fp->data.low = bp_unpack_var_len_int (bp);
 220   fp->data.high = bp_unpack_var_len_int (bp);
 221   TREE_FIXED_CST_PTR (expr) = fp;
 222 }
 223
 224 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
 225    of expression EXPR from bitpack BP.  */
 226
 227 static void
 228 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 229 {
 230   SET_DECL_MODE (expr, bp_unpack_machine_mode (bp));
 231   DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 232   DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 233   DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 234   DECL_ABSTRACT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 235   DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 236   DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 237   DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 238   DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
 239   DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 240   SET_DECL_ALIGN (expr, (unsigned) bp_unpack_var_len_unsigned (bp));
 241 #ifdef ACCEL_COMPILER
 242   if (DECL_ALIGN (expr) > targetm.absolute_biggest_alignment)
 243     SET_DECL_ALIGN (expr, targetm.absolute_biggest_alignment);
 244 #endif
 245   if (TREE_CODE (expr) == LABEL_DECL)
 246     {
 247       EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
 248
 249       /* Always assume an initial value of -1 for LABEL_DECL_UID to
 250          force gimple_set_bb to recreate label_to_block_map.  */
 251       LABEL_DECL_UID (expr) = -1;
 252     }
 253
 254   else if (TREE_CODE (expr) == FIELD_DECL)
 255     {
 256       DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 257       DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 258       DECL_PADDING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 259       expr->decl_common.off_align = bp_unpack_value (bp, 8);
 260     }
 261
 262   else if (VAR_P (expr))
 263     {
 264       DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 265       DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
 266     }
 267
 268   else if (TREE_CODE (expr) == PARM_DECL)
 269     DECL_HIDDEN_STRING_LENGTH (expr) = (unsigned) bp_unpack_value (bp, 1);
 270
 271   if (TREE_CODE (expr) == RESULT_DECL
 272       || TREE_CODE (expr) == PARM_DECL
 273       || VAR_P (expr))
 274     {
 275       DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
 276       if (VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 277         DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 278     }
 279 }
 280
 281
 282 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
 283    of expression EXPR from bitpack BP.  */
 284
 285 static void
 286 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 287 {
 288   DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 289 }
 290
 291
 292 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 293    of expression EXPR from bitpack BP.  */
 294
 295 static void
 296 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 297 {
 298   DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
 299   DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 300   DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
 301   DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp,  1);
 302   DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp,  1);
 303   DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp,  2);
 304   DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp,  1);
 305
 306   if (VAR_P (expr))
 307     {
 308       DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 309       DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
 310     }
 311
 312   if (TREE_CODE (expr) == FUNCTION_DECL)
 313     {
 314       DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 315       DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 316       DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 317     }
 318 }
 319
 320
 321 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
 322    of expression EXPR from bitpack BP.  */
 323
 324 static void
 325 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 326 {
 327   built_in_class cl = bp_unpack_enum (bp, built_in_class, BUILT_IN_LAST);
 328   DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 329   DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 330   DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 331   DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
 332   DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
 333   DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
 334   DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
 335   DECL_SET_IS_OPERATOR_NEW (expr, (unsigned) bp_unpack_value (bp, 1));
 336   DECL_SET_IS_OPERATOR_DELETE (expr, (unsigned) bp_unpack_value (bp, 1));
 337   DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 338   DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
 339   DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 340   DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
 341                         = (unsigned) bp_unpack_value (bp, 1);
 342   DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
 343   DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
 344   DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 345   DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 346   unsigned int fcode = 0;
 347   if (cl != NOT_BUILT_IN)
 348     {
 349       fcode = bp_unpack_value (bp, 32);
 350       if (cl == BUILT_IN_NORMAL && fcode >= END_BUILTINS)
 351         fatal_error (input_location,
 352                      "machine independent builtin code out of range");
 353       else if (cl == BUILT_IN_MD)
 354         {
 355           tree result = targetm.builtin_decl (fcode, true);
 356           if (!result || result == error_mark_node)
 357             fatal_error (input_location,
 358                          "target specific builtin not available");
 359         }
 360     }
 361   set_decl_built_in_function (expr, cl, fcode);
 362 }
 363
 364
 365 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
 366    of expression EXPR from bitpack BP.  */
 367
 368 static void
 369 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 370 {
 371   machine_mode mode;
 372
 373   mode = bp_unpack_machine_mode (bp);
 374   SET_TYPE_MODE (expr, mode);
 375   /* TYPE_NO_FORCE_BLK is private to stor-layout and need
 376      no streaming.  */
 377   TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 378   TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
 379   TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 380   TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 381   if (RECORD_OR_UNION_TYPE_P (expr))
 382     {
 383       TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
 384       TYPE_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 385       TYPE_CXX_ODR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 386     }
 387   else if (TREE_CODE (expr) == ARRAY_TYPE)
 388     TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
 389   if (TREE_CODE (expr) == ARRAY_TYPE || TREE_CODE (expr) == INTEGER_TYPE)
 390     TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
 391   if (AGGREGATE_TYPE_P (expr))
 392     TYPE_TYPELESS_STORAGE (expr) = (unsigned) bp_unpack_value (bp, 1);
 393   TYPE_EMPTY_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 394   TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
 395   SET_TYPE_ALIGN (expr, bp_unpack_var_len_unsigned (bp));
 396 #ifdef ACCEL_COMPILER
 397   if (TYPE_ALIGN (expr) > targetm.absolute_biggest_alignment)
 398     SET_TYPE_ALIGN (expr, targetm.absolute_biggest_alignment);
 399 #endif
 400 }
 401
 402
 403 /* Unpack all the non-pointer fields of the TS_BLOCK structure
 404    of expression EXPR from bitpack BP.  */
 405
 406 static void
 407 unpack_ts_block_value_fields (class data_in *data_in,
 408                               struct bitpack_d *bp, tree expr)
 409 {
 410   /* BLOCK_NUMBER is recomputed.  */
 411   stream_input_location (&BLOCK_SOURCE_LOCATION (expr), bp, data_in);
 412 }
 413
 414 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
 415    structure of expression EXPR from bitpack BP.  */
 416
 417 static void
 418 unpack_ts_translation_unit_decl_value_fields (class data_in *data_in,
 419                                               struct bitpack_d *bp, tree expr)
 420 {
 421   TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
 422   vec_safe_push (all_translation_units, expr);
 423 }
 424
 425
 426 /* Unpack all the non-pointer fields of the TS_OMP_CLAUSE
 427    structure of expression EXPR from bitpack BP.  */
 428
 429 static void
 430 unpack_ts_omp_clause_value_fields (class data_in *data_in,
 431                                    struct bitpack_d *bp, tree expr)
 432 {
 433   stream_input_location (&OMP_CLAUSE_LOCATION (expr), bp, data_in);
 434   switch (OMP_CLAUSE_CODE (expr))
 435     {
 436     case OMP_CLAUSE_DEFAULT:
 437       OMP_CLAUSE_DEFAULT_KIND (expr)
 438         = bp_unpack_enum (bp, omp_clause_default_kind,
 439                           OMP_CLAUSE_DEFAULT_LAST);
 440       break;
 441     case OMP_CLAUSE_SCHEDULE:
 442       OMP_CLAUSE_SCHEDULE_KIND (expr)
 443         = bp_unpack_enum (bp, omp_clause_schedule_kind,
 444                           OMP_CLAUSE_SCHEDULE_LAST);
 445       break;
 446     case OMP_CLAUSE_DEPEND:
 447       OMP_CLAUSE_DEPEND_KIND (expr)
 448         = bp_unpack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST);
 449       break;
 450     case OMP_CLAUSE_MAP:
 451       OMP_CLAUSE_SET_MAP_KIND (expr, bp_unpack_enum (bp, gomp_map_kind,
 452                                                      GOMP_MAP_LAST));
 453       break;
 454     case OMP_CLAUSE_PROC_BIND:
 455       OMP_CLAUSE_PROC_BIND_KIND (expr)
 456         = bp_unpack_enum (bp, omp_clause_proc_bind_kind,
 457                           OMP_CLAUSE_PROC_BIND_LAST);
 458       break;
 459     case OMP_CLAUSE_REDUCTION:
 460     case OMP_CLAUSE_TASK_REDUCTION:
 461     case OMP_CLAUSE_IN_REDUCTION:
 462       OMP_CLAUSE_REDUCTION_CODE (expr)
 463         = bp_unpack_enum (bp, tree_code, MAX_TREE_CODES);
 464       break;
 465     default:
 466       break;
 467     }
 468 }
 469
 470
 471 /* Read all the language-independent bitfield values for EXPR from IB.
 472    Return the partially unpacked bitpack so the caller can unpack any other
 473    bitfield values that the writer may have written.  */
 474
 475 void
 476 streamer_read_tree_bitfields (class lto_input_block *ib,
 477                               class data_in *data_in, tree expr)
 478 {
 479   enum tree_code code;
 480   struct bitpack_d bp;
 481
 482   /* Read the bitpack of non-pointer values from IB.  */
 483   bp = streamer_read_bitpack (ib);
 484
 485   /* The first word in BP contains the code of the tree that we
 486      are about to read.  */
 487   code = (enum tree_code) bp_unpack_value (&bp, 16);
 488   lto_tag_check (lto_tree_code_to_tag (code),
 489                  lto_tree_code_to_tag (TREE_CODE (expr)));
 490
 491   /* Note that all these functions are highly sensitive to changes in
 492      the types and sizes of each of the fields being packed.  */
 493   unpack_ts_base_value_fields (&bp, expr);
 494
 495   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 496     unpack_ts_int_cst_value_fields (&bp, expr);
 497
 498   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 499     unpack_ts_real_cst_value_fields (&bp, expr);
 500
 501   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 502     unpack_ts_fixed_cst_value_fields (&bp, expr);
 503
 504   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 505     stream_input_location (&DECL_SOURCE_LOCATION (expr), &bp, data_in);
 506
 507   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 508     unpack_ts_decl_common_value_fields (&bp, expr);
 509
 510   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 511     unpack_ts_decl_wrtl_value_fields (&bp, expr);
 512
 513   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 514     unpack_ts_decl_with_vis_value_fields (&bp, expr);
 515
 516   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 517     unpack_ts_function_decl_value_fields (&bp, expr);
 518
 519   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 520     unpack_ts_type_common_value_fields (&bp, expr);
 521
 522   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 523     {
 524       stream_input_location (&EXPR_CHECK (expr)->exp.locus, &bp, data_in);
 525       if (code == MEM_REF
 526           || code == TARGET_MEM_REF)
 527         {
 528           MR_DEPENDENCE_CLIQUE (expr)
 529             = (unsigned)bp_unpack_value (&bp, sizeof (short) * 8);
 530           if (MR_DEPENDENCE_CLIQUE (expr) != 0)
 531             MR_DEPENDENCE_BASE (expr)
 532               = (unsigned)bp_unpack_value (&bp, sizeof (short) * 8);
 533         }
 534       else if (code == CALL_EXPR)
 535         CALL_EXPR_IFN (expr) = bp_unpack_enum (&bp, internal_fn, IFN_LAST);
 536     }
 537
 538   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 539     unpack_ts_block_value_fields (data_in, &bp, expr);
 540
 541   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 542     unpack_ts_translation_unit_decl_value_fields (data_in, &bp, expr);
 543
 544   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 545     cl_optimization_stream_in (data_in, &bp, TREE_OPTIMIZATION (expr));
 546
 547   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 548     {
 549       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (&bp);
 550       if (length > 0)
 551         vec_safe_grow (CONSTRUCTOR_ELTS (expr), length);
 552     }
 553
 554 #ifndef ACCEL_COMPILER
 555   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
 556     {
 557       cl_target_option_stream_in (data_in, &bp, TREE_TARGET_OPTION (expr));
 558       if (targetm.target_option.post_stream_in)
 559         targetm.target_option.post_stream_in (TREE_TARGET_OPTION (expr));
 560     }
 561 #endif
 562
 563   if (code == OMP_CLAUSE)
 564     unpack_ts_omp_clause_value_fields (data_in, &bp, expr);
 565 }
 566
 567
 568 /* Materialize a new tree from input block IB using descriptors in
 569    DATA_IN.  The code for the new tree should match TAG.  Store in
 570    *IX_P the index into the reader cache where the new tree is stored.  */
 571
 572 tree
 573 streamer_alloc_tree (class lto_input_block *ib, class data_in *data_in,
 574                      enum LTO_tags tag)
 575 {
 576   enum tree_code code;
 577   tree result;
 578
 579   result = NULL_TREE;
 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       bitpack_d bp = streamer_read_bitpack (ib);
 600       unsigned int log2_npatterns = bp_unpack_value (&bp, 8);
 601       unsigned int nelts_per_pattern = bp_unpack_value (&bp, 8);
 602       result = make_vector (log2_npatterns, nelts_per_pattern);
 603     }
 604   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 605     {
 606       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 607       result = make_tree_binfo (len);
 608     }
 609   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 610     {
 611       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 612       unsigned HOST_WIDE_INT ext_len = streamer_read_uhwi (ib);
 613       result = make_int_cst (len, ext_len);
 614     }
 615   else if (code == CALL_EXPR)
 616     {
 617       unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
 618       return build_vl_exp (CALL_EXPR, nargs + 3);
 619     }
 620   else if (code == OMP_CLAUSE)
 621     {
 622       enum omp_clause_code subcode
 623         = (enum omp_clause_code) streamer_read_uhwi (ib);
 624       return build_omp_clause (UNKNOWN_LOCATION, subcode);
 625     }
 626   else
 627     {
 628       /* For all other nodes, materialize the tree with a raw
 629          make_node call.  */
 630       result = make_node (code);
 631     }
 632
 633   return result;
 634 }
 635
 636
 637 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
 638    block IB.  DATA_IN contains tables and descriptors for the
 639    file being read.  */
 640
 641
 642 static void
 643 lto_input_ts_common_tree_pointers (class lto_input_block *ib,
 644                                    class data_in *data_in, tree expr)
 645 {
 646   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 647     TREE_TYPE (expr) = stream_read_tree (ib, data_in);
 648 }
 649
 650
 651 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
 652    block IB.  DATA_IN contains tables and descriptors for the
 653    file being read.  */
 654
 655 static void
 656 lto_input_ts_vector_tree_pointers (class lto_input_block *ib,
 657                                    class data_in *data_in, tree expr)
 658 {
 659   unsigned int count = vector_cst_encoded_nelts (expr);
 660   for (unsigned int i = 0; i < count; ++i)
 661     VECTOR_CST_ENCODED_ELT (expr, i) = stream_read_tree (ib, data_in);
 662 }
 663
 664
 665 /* Read all pointer fields in the TS_POLY_INT_CST structure of EXPR from
 666    input block IB.  DATA_IN contains tables and descriptors for the
 667    file being read.  */
 668
 669 static void
 670 lto_input_ts_poly_tree_pointers (class lto_input_block *ib,
 671                                  class data_in *data_in, tree expr)
 672 {
 673   for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i)
 674     POLY_INT_CST_COEFF (expr, i) = stream_read_tree (ib, data_in);
 675 }
 676
 677
 678 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
 679    block IB.  DATA_IN contains tables and descriptors for the
 680    file being read.  */
 681
 682 static void
 683 lto_input_ts_complex_tree_pointers (class lto_input_block *ib,
 684                                     class data_in *data_in, tree expr)
 685 {
 686   TREE_REALPART (expr) = stream_read_tree (ib, data_in);
 687   TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
 688 }
 689
 690
 691 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 692    from input block IB.  DATA_IN contains tables and descriptors for the
 693    file being read.  */
 694
 695 static void
 696 lto_input_ts_decl_minimal_tree_pointers (class lto_input_block *ib,
 697                                          class data_in *data_in, tree expr)
 698 {
 699   DECL_NAME (expr) = stream_read_tree (ib, data_in);
 700   DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
 701 }
 702
 703
 704 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
 705    input block IB.  DATA_IN contains tables and descriptors for the
 706    file being read.  */
 707
 708 static void
 709 lto_input_ts_decl_common_tree_pointers (class lto_input_block *ib,
 710                                         class data_in *data_in, tree expr)
 711 {
 712   DECL_SIZE (expr) = stream_read_tree (ib, data_in);
 713   DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
 714   DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
 715   DECL_ABSTRACT_ORIGIN (expr) = stream_read_tree (ib, data_in);
 716
 717   if ((VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 718       && DECL_HAS_VALUE_EXPR_P (expr))
 719     SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
 720
 721   if (VAR_P (expr)
 722       && DECL_HAS_DEBUG_EXPR_P (expr))
 723     {
 724       tree dexpr = stream_read_tree (ib, data_in);
 725       if (dexpr)
 726         SET_DECL_DEBUG_EXPR (expr, dexpr);
 727     }
 728 }
 729
 730
 731 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
 732    EXPR from input block IB.  DATA_IN contains tables and descriptors for the
 733    file being read.  */
 734
 735 static void
 736 lto_input_ts_decl_non_common_tree_pointers (class lto_input_block *,
 737                                             class data_in *, tree)
 738 {
 739 }
 740
 741
 742 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 743    from input block IB.  DATA_IN contains tables and descriptors for the
 744    file being read.  */
 745
 746 static void
 747 lto_input_ts_decl_with_vis_tree_pointers (class lto_input_block *ib,
 748                                           class data_in *data_in, tree expr)
 749 {
 750   tree id;
 751
 752   id = stream_read_tree (ib, data_in);
 753   if (id)
 754     {
 755       gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
 756       SET_DECL_ASSEMBLER_NAME (expr, id);
 757     }
 758 }
 759
 760
 761 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
 762    input block IB.  DATA_IN contains tables and descriptors for the
 763    file being read.  */
 764
 765 static void
 766 lto_input_ts_field_decl_tree_pointers (class lto_input_block *ib,
 767                                        class data_in *data_in, tree expr)
 768 {
 769   DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
 770   DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
 771   DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
 772   DECL_FIELD_BIT_OFFSET (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 (class lto_input_block *ib,
 782                                           class data_in *data_in, tree expr)
 783 {
 784   /* DECL_STRUCT_FUNCTION is loaded on demand by cgraph_get_body.  */
 785   DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
 786 #ifndef ACCEL_COMPILER
 787   DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree (ib, data_in);
 788 #endif
 789   DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
 790 #ifdef ACCEL_COMPILER
 791   {
 792     tree opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr);
 793     if (opts)
 794       {
 795         struct gcc_options tmp;
 796         init_options_struct (&tmp, NULL);
 797         cl_optimization_restore (&tmp, TREE_OPTIMIZATION (opts));
 798         finish_options (&tmp, &global_options_set, UNKNOWN_LOCATION);
 799         opts = build_optimization_node (&tmp);
 800         finalize_options_struct (&tmp);
 801         DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = opts;
 802       }
 803   }
 804 #endif
 805
 806   /* If the file contains a function with an EH personality set,
 807      then it was compiled with -fexceptions.  In that case, initialize
 808      the backend EH machinery.  */
 809   if (DECL_FUNCTION_PERSONALITY (expr))
 810     lto_init_eh ();
 811 }
 812
 813
 814 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
 815    input block IB.  DATA_IN contains tables and descriptors for the file
 816    being read.  */
 817
 818 static void
 819 lto_input_ts_type_common_tree_pointers (class lto_input_block *ib,
 820                                         class data_in *data_in, tree expr)
 821 {
 822   TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
 823   TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
 824   TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
 825   TYPE_NAME (expr) = stream_read_tree (ib, data_in);
 826   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 827      reconstructed during fixup.  */
 828   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 829      during fixup.  */
 830   TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
 831   TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
 832   /* TYPE_CANONICAL gets re-computed during type merging.  */
 833   TYPE_CANONICAL (expr) = NULL_TREE;
 834 }
 835
 836 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 837    from input block IB.  DATA_IN contains tables and descriptors for the
 838    file being read.  */
 839
 840 static void
 841 lto_input_ts_type_non_common_tree_pointers (class lto_input_block *ib,
 842                                             class data_in *data_in,
 843                                             tree expr)
 844 {
 845   if (TREE_CODE (expr) == ENUMERAL_TYPE)
 846     TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
 847   else if (TREE_CODE (expr) == ARRAY_TYPE)
 848     TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
 849   else if (RECORD_OR_UNION_TYPE_P (expr))
 850     TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
 851   else if (TREE_CODE (expr) == FUNCTION_TYPE
 852            || TREE_CODE (expr) == METHOD_TYPE)
 853     TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
 854
 855   if (!POINTER_TYPE_P (expr))
 856     TYPE_MIN_VALUE_RAW (expr) = stream_read_tree (ib, data_in);
 857   TYPE_MAX_VALUE_RAW (expr) = stream_read_tree (ib, data_in);
 858 }
 859
 860
 861 /* Read all pointer fields in the TS_LIST structure of EXPR from input
 862    block IB.  DATA_IN contains tables and descriptors for the
 863    file being read.  */
 864
 865 static void
 866 lto_input_ts_list_tree_pointers (class lto_input_block *ib,
 867                                  class data_in *data_in, tree expr)
 868 {
 869   TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
 870   TREE_VALUE (expr) = stream_read_tree (ib, data_in);
 871   TREE_CHAIN (expr) = stream_read_tree (ib, data_in);
 872 }
 873
 874
 875 /* Read all pointer fields in the TS_VEC structure of EXPR from input
 876    block IB.  DATA_IN contains tables and descriptors for the
 877    file being read.  */
 878
 879 static void
 880 lto_input_ts_vec_tree_pointers (class lto_input_block *ib,
 881                                 class data_in *data_in, tree expr)
 882 {
 883   int i;
 884
 885   /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
 886      instantiate EXPR.  */
 887   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 888     TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
 889 }
 890
 891
 892 /* Read all pointer fields in the TS_EXP structure of EXPR from input
 893    block IB.  DATA_IN contains tables and descriptors for the
 894    file being read.  */
 895
 896
 897 static void
 898 lto_input_ts_exp_tree_pointers (class lto_input_block *ib,
 899                                 class data_in *data_in, tree expr)
 900 {
 901   int i;
 902   tree block;
 903
 904   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 905     TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
 906
 907   block = stream_read_tree (ib, data_in);
 908
 909   /* TODO: Block is stored in the locus information.  It may make more sense to
 910      to make it go via the location cache.  */
 911   if (block)
 912     {
 913       data_in->location_cache.apply_location_cache ();
 914       TREE_SET_BLOCK (expr, block);
 915     }
 916 }
 917
 918
 919 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
 920    block IB.  DATA_IN contains tables and descriptors for the
 921    file being read.  */
 922
 923 static void
 924 lto_input_ts_block_tree_pointers (class lto_input_block *ib,
 925                                   class data_in *data_in, tree expr)
 926 {
 927   BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
 928
 929   BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
 930   BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree (ib, data_in);
 931   /* We may end up prevailing a decl with DECL_ORIGIN (t) != t here
 932      which breaks the invariant that BLOCK_ABSTRACT_ORIGIN is the
 933      ultimate origin.  Fixup here.
 934      ???  This should get fixed with moving to DIE references.  */
 935   if (DECL_P (BLOCK_ORIGIN (expr)))
 936     BLOCK_ABSTRACT_ORIGIN (expr) = DECL_ORIGIN (BLOCK_ABSTRACT_ORIGIN (expr));
 937   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 938      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 939      dwarf2out.c.  */
 940
 941   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 942      streaming time.  */
 943
 944   /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
 945      of streaming it.  For non-BLOCK BLOCK_SUPERCONTEXTs we still
 946      stream the child relationship explicitly.  */
 947   if (BLOCK_SUPERCONTEXT (expr)
 948       && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
 949     {
 950       BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
 951       BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
 952     }
 953
 954   /* The global block is rooted at the TU decl.  Hook it here to
 955      avoid the need to stream in this block during WPA time.  */
 956   else if (BLOCK_SUPERCONTEXT (expr)
 957            && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
 958     DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
 959
 960   /* The function-level block is connected at the time we read in
 961      function bodies for the same reason.  */
 962 }
 963
 964
 965 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
 966    block IB.  DATA_IN contains tables and descriptors for the
 967    file being read.  */
 968
 969 static void
 970 lto_input_ts_binfo_tree_pointers (class lto_input_block *ib,
 971                                   class data_in *data_in, tree expr)
 972 {
 973   tree t;
 974
 975   /* Note that the number of slots in EXPR was read in
 976      streamer_alloc_tree when instantiating EXPR.  However, the
 977      vector is empty so we cannot rely on vec::length to know how many
 978      elements to read.  So, this list is emitted as a 0-terminated
 979      list on the writer side.  */
 980   do
 981     {
 982       t = stream_read_tree (ib, data_in);
 983       if (t)
 984         BINFO_BASE_BINFOS (expr)->quick_push (t);
 985     }
 986   while (t);
 987
 988   BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
 989   BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
 990
 991   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX,
 992      BINFO_BASE_ACCESSES and BINFO_VPTR_INDEX; these are used by C++ FE
 993      only.  */
 994 }
 995
 996
 997 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
 998    input block IB.  DATA_IN contains tables and descriptors for the
 999    file being read.  */
1000
1001 static void
1002 lto_input_ts_constructor_tree_pointers (class lto_input_block *ib,
1003                                         class data_in *data_in, tree expr)
1004 {
1005   unsigned i;
1006
1007   for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
1008     {
1009       constructor_elt e;
1010       e.index = stream_read_tree (ib, data_in);
1011       e.value = stream_read_tree (ib, data_in);
1012       (*CONSTRUCTOR_ELTS (expr))[i] = e;
1013     }
1014 }
1015
1016
1017 /* Read all pointer fields in the TS_OMP_CLAUSE structure of EXPR from
1018    input block IB.  DATA_IN contains tables and descriptors for the
1019    file being read.  */
1020
1021 static void
1022 lto_input_ts_omp_clause_tree_pointers (class lto_input_block *ib,
1023                                        class data_in *data_in, tree expr)
1024 {
1025   int i;
1026
1027   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
1028     OMP_CLAUSE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
1029   OMP_CLAUSE_CHAIN (expr) = stream_read_tree (ib, data_in);
1030 }
1031
1032
1033 /* Read all pointer fields in EXPR from input block IB.  DATA_IN
1034    contains tables and descriptors for the file being read.  */
1035
1036 void
1037 streamer_read_tree_body (class lto_input_block *ib, class data_in *data_in,
1038                          tree expr)
1039 {
1040   enum tree_code code;
1041
1042   code = TREE_CODE (expr);
1043
1044   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
1045     lto_input_ts_common_tree_pointers (ib, data_in, expr);
1046
1047   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1048     lto_input_ts_vector_tree_pointers (ib, data_in, expr);
1049
1050   if (CODE_CONTAINS_STRUCT (code, TS_POLY_INT_CST))
1051     lto_input_ts_poly_tree_pointers (ib, data_in, expr);
1052
1053   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1054     lto_input_ts_complex_tree_pointers (ib, data_in, expr);
1055
1056   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1057     lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
1058
1059   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1060     lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
1061
1062   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1063     lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
1064
1065   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1066     lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
1067
1068   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1069     lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
1070
1071   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1072     lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1073
1074   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1075     lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1076
1077   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1078     lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1079
1080   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1081     lto_input_ts_list_tree_pointers (ib, data_in, expr);
1082
1083   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1084     lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1085
1086   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1087     lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1088
1089   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1090     lto_input_ts_block_tree_pointers (ib, data_in, expr);
1091
1092   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1093     lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1094
1095   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1096     lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1097
1098   if (code == OMP_CLAUSE)
1099     lto_input_ts_omp_clause_tree_pointers (ib, data_in, expr);
1100 }
1101
1102
1103 /* Read an index IX from input block IB and return the tree node at
1104    DATA_IN->FILE_DATA->GLOBALS_INDEX[IX].  */
1105
1106 tree
1107 streamer_get_pickled_tree (class lto_input_block *ib, class data_in *data_in)
1108 {
1109   unsigned HOST_WIDE_INT ix;
1110   tree result;
1111   enum LTO_tags expected_tag;
1112
1113   ix = streamer_read_uhwi (ib);
1114   expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1115
1116   result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1117   gcc_assert (result
1118               && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1119
1120   return result;
1121 }