gcc/tree-streamer-in.c

   1 /* Routines for reading trees from a file stream.
   2
   3    Copyright (C) 2011-2021 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       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_NOT_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       unsigned val = (unsigned) bp_unpack_value (bp, 1);
 260       if (DECL_BIT_FIELD (expr))
 261         SET_DECL_FIELD_CXX_ZERO_WIDTH_BIT_FIELD (expr, val);
 262       else
 263         SET_DECL_FIELD_ABI_IGNORED (expr, val);
 264       expr->decl_common.off_align = bp_unpack_value (bp, 8);
 265     }
 266
 267   else if (VAR_P (expr))
 268     {
 269       DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 270       DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
 271     }
 272
 273   else if (TREE_CODE (expr) == PARM_DECL)
 274     DECL_HIDDEN_STRING_LENGTH (expr) = (unsigned) bp_unpack_value (bp, 1);
 275
 276   if (TREE_CODE (expr) == RESULT_DECL
 277       || TREE_CODE (expr) == PARM_DECL
 278       || VAR_P (expr))
 279     {
 280       DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
 281       if (VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 282         DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 283     }
 284 }
 285
 286
 287 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
 288    of expression EXPR from bitpack BP.  */
 289
 290 static void
 291 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 292 {
 293   DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 294 }
 295
 296
 297 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 298    of expression EXPR from bitpack BP.  */
 299
 300 static void
 301 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 302 {
 303   DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
 304   DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 305   DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
 306   DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp,  1);
 307   DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp,  1);
 308   DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp,  2);
 309   DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp,  1);
 310
 311   if (VAR_P (expr))
 312     {
 313       DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
 314       DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
 315     }
 316
 317   if (TREE_CODE (expr) == FUNCTION_DECL)
 318     {
 319       DECL_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 320       DECL_CXX_CONSTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 321       DECL_CXX_DESTRUCTOR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 322     }
 323 }
 324
 325
 326 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
 327    of expression EXPR from bitpack BP.  */
 328
 329 static void
 330 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 331 {
 332   built_in_class cl = bp_unpack_enum (bp, built_in_class, BUILT_IN_LAST);
 333   DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 334   DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 335   DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
 336   DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
 337   DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
 338   DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
 339   DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
 340   FUNCTION_DECL_DECL_TYPE (expr) = (function_decl_type) bp_unpack_value (bp, 2);
 341   DECL_SET_IS_OPERATOR_DELETE (expr, (unsigned) bp_unpack_value (bp, 1));
 342   DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 343   DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
 344   DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 345   DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
 346                         = (unsigned) bp_unpack_value (bp, 1);
 347   DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
 348   DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
 349   DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 350   DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 351   DECL_IS_REPLACEABLE_OPERATOR (expr) = (unsigned) bp_unpack_value (bp, 1);
 352   unsigned int fcode = 0;
 353   if (cl != NOT_BUILT_IN)
 354     {
 355       fcode = bp_unpack_value (bp, 32);
 356       if (cl == BUILT_IN_NORMAL && fcode >= END_BUILTINS)
 357         fatal_error (input_location,
 358                      "machine independent builtin code out of range");
 359       else if (cl == BUILT_IN_MD)
 360         {
 361           tree result = targetm.builtin_decl (fcode, true);
 362           if (!result || result == error_mark_node)
 363             fatal_error (input_location,
 364                          "target specific builtin not available");
 365         }
 366     }
 367   set_decl_built_in_function (expr, cl, fcode);
 368 }
 369
 370
 371 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
 372    of expression EXPR from bitpack BP.  */
 373
 374 static void
 375 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 376 {
 377   machine_mode mode;
 378
 379   mode = bp_unpack_machine_mode (bp);
 380   SET_TYPE_MODE (expr, mode);
 381   /* TYPE_NO_FORCE_BLK is private to stor-layout and need
 382      no streaming.  */
 383   TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
 384   TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
 385   TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
 386   TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
 387   TYPE_LANG_FLAG_0 (expr) = (unsigned) bp_unpack_value (bp, 1);
 388   if (RECORD_OR_UNION_TYPE_P (expr))
 389     {
 390       TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
 391       TYPE_FINAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 392       TYPE_CXX_ODR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 393     }
 394   else if (TREE_CODE (expr) == ARRAY_TYPE)
 395     TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
 396   if (TREE_CODE (expr) == ARRAY_TYPE || TREE_CODE (expr) == INTEGER_TYPE)
 397     TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
 398   if (AGGREGATE_TYPE_P (expr))
 399     TYPE_TYPELESS_STORAGE (expr) = (unsigned) bp_unpack_value (bp, 1);
 400   TYPE_EMPTY_P (expr) = (unsigned) bp_unpack_value (bp, 1);
 401   TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
 402   SET_TYPE_ALIGN (expr, bp_unpack_var_len_unsigned (bp));
 403 #ifdef ACCEL_COMPILER
 404   if (TYPE_ALIGN (expr) > targetm.absolute_biggest_alignment)
 405     SET_TYPE_ALIGN (expr, targetm.absolute_biggest_alignment);
 406 #endif
 407 }
 408
 409
 410 /* Unpack all the non-pointer fields of the TS_BLOCK structure
 411    of expression EXPR from bitpack BP.  */
 412
 413 static void
 414 unpack_ts_block_value_fields (class data_in *data_in,
 415                               struct bitpack_d *bp, tree expr)
 416 {
 417   /* BLOCK_NUMBER is recomputed.  */
 418   stream_input_location (&BLOCK_SOURCE_LOCATION (expr), bp, data_in);
 419 }
 420
 421 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
 422    structure of expression EXPR from bitpack BP.  */
 423
 424 static void
 425 unpack_ts_translation_unit_decl_value_fields (class data_in *data_in,
 426                                               struct bitpack_d *bp, tree expr)
 427 {
 428   TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
 429   vec_safe_push (all_translation_units, expr);
 430 }
 431
 432
 433 /* Unpack all the non-pointer fields of the TS_OMP_CLAUSE
 434    structure of expression EXPR from bitpack BP.  */
 435
 436 static void
 437 unpack_ts_omp_clause_value_fields (class data_in *data_in,
 438                                    struct bitpack_d *bp, tree expr)
 439 {
 440   stream_input_location (&OMP_CLAUSE_LOCATION (expr), bp, data_in);
 441   switch (OMP_CLAUSE_CODE (expr))
 442     {
 443     case OMP_CLAUSE_DEFAULT:
 444       OMP_CLAUSE_DEFAULT_KIND (expr)
 445         = bp_unpack_enum (bp, omp_clause_default_kind,
 446                           OMP_CLAUSE_DEFAULT_LAST);
 447       break;
 448     case OMP_CLAUSE_SCHEDULE:
 449       OMP_CLAUSE_SCHEDULE_KIND (expr)
 450         = bp_unpack_enum (bp, omp_clause_schedule_kind,
 451                           OMP_CLAUSE_SCHEDULE_LAST);
 452       break;
 453     case OMP_CLAUSE_DEPEND:
 454       OMP_CLAUSE_DEPEND_KIND (expr)
 455         = bp_unpack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST);
 456       break;
 457     case OMP_CLAUSE_MAP:
 458       OMP_CLAUSE_SET_MAP_KIND (expr, bp_unpack_enum (bp, gomp_map_kind,
 459                                                      GOMP_MAP_LAST));
 460       break;
 461     case OMP_CLAUSE_PROC_BIND:
 462       OMP_CLAUSE_PROC_BIND_KIND (expr)
 463         = bp_unpack_enum (bp, omp_clause_proc_bind_kind,
 464                           OMP_CLAUSE_PROC_BIND_LAST);
 465       break;
 466     case OMP_CLAUSE_REDUCTION:
 467     case OMP_CLAUSE_TASK_REDUCTION:
 468     case OMP_CLAUSE_IN_REDUCTION:
 469       OMP_CLAUSE_REDUCTION_CODE (expr)
 470         = bp_unpack_enum (bp, tree_code, MAX_TREE_CODES);
 471       break;
 472     default:
 473       break;
 474     }
 475 }
 476
 477
 478 /* Read all the language-independent bitfield values for EXPR from IB.
 479    Return the partially unpacked bitpack so the caller can unpack any other
 480    bitfield values that the writer may have written.  */
 481
 482 void
 483 streamer_read_tree_bitfields (class lto_input_block *ib,
 484                               class data_in *data_in, tree expr)
 485 {
 486   enum tree_code code;
 487   struct bitpack_d bp;
 488
 489   /* Read the bitpack of non-pointer values from IB.  */
 490   bp = streamer_read_bitpack (ib);
 491
 492   /* The first word in BP contains the code of the tree that we
 493      are about to read.  */
 494   if (streamer_debugging)
 495     {
 496       code = (enum tree_code) bp_unpack_value (&bp, 16);
 497       lto_tag_check (lto_tree_code_to_tag (code),
 498                      lto_tree_code_to_tag (TREE_CODE (expr)));
 499     }
 500   code = TREE_CODE (expr);
 501
 502   /* Note that all these functions are highly sensitive to changes in
 503      the types and sizes of each of the fields being packed.  */
 504   unpack_ts_base_value_fields (&bp, expr);
 505
 506   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 507     unpack_ts_int_cst_value_fields (&bp, expr);
 508
 509   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 510     unpack_ts_real_cst_value_fields (&bp, expr);
 511
 512   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 513     unpack_ts_fixed_cst_value_fields (&bp, expr);
 514
 515   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 516     stream_input_location (&DECL_SOURCE_LOCATION (expr), &bp, data_in);
 517
 518   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 519     unpack_ts_decl_common_value_fields (&bp, expr);
 520
 521   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 522     unpack_ts_decl_wrtl_value_fields (&bp, expr);
 523
 524   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 525     unpack_ts_decl_with_vis_value_fields (&bp, expr);
 526
 527   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 528     unpack_ts_function_decl_value_fields (&bp, expr);
 529
 530   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 531     unpack_ts_type_common_value_fields (&bp, expr);
 532
 533   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 534     {
 535       stream_input_location (&EXPR_CHECK (expr)->exp.locus, &bp, data_in);
 536       if (code == MEM_REF
 537           || code == TARGET_MEM_REF)
 538         {
 539           MR_DEPENDENCE_CLIQUE (expr)
 540             = (unsigned)bp_unpack_value (&bp, sizeof (short) * 8);
 541           if (MR_DEPENDENCE_CLIQUE (expr) != 0)
 542             MR_DEPENDENCE_BASE (expr)
 543               = (unsigned)bp_unpack_value (&bp, sizeof (short) * 8);
 544         }
 545       else if (code == CALL_EXPR)
 546         CALL_EXPR_IFN (expr) = bp_unpack_enum (&bp, internal_fn, IFN_LAST);
 547     }
 548
 549   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 550     unpack_ts_block_value_fields (data_in, &bp, expr);
 551
 552   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 553     unpack_ts_translation_unit_decl_value_fields (data_in, &bp, expr);
 554
 555   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 556     cl_optimization_stream_in (data_in, &bp, TREE_OPTIMIZATION (expr));
 557
 558   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 559     {
 560       unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (&bp);
 561       if (length > 0)
 562         vec_safe_grow (CONSTRUCTOR_ELTS (expr), length, true);
 563     }
 564
 565 #ifndef ACCEL_COMPILER
 566   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
 567     {
 568       cl_target_option_stream_in (data_in, &bp, TREE_TARGET_OPTION (expr));
 569       if (targetm.target_option.post_stream_in)
 570         targetm.target_option.post_stream_in (TREE_TARGET_OPTION (expr));
 571     }
 572 #endif
 573
 574   if (code == OMP_CLAUSE)
 575     unpack_ts_omp_clause_value_fields (data_in, &bp, expr);
 576 }
 577
 578
 579 /* Materialize a new tree from input block IB using descriptors in
 580    DATA_IN.  The code for the new tree should match TAG.  Store in
 581    *IX_P the index into the reader cache where the new tree is stored.  */
 582
 583 tree
 584 streamer_alloc_tree (class lto_input_block *ib, class data_in *data_in,
 585                      enum LTO_tags tag)
 586 {
 587   enum tree_code code;
 588   tree result;
 589
 590   result = NULL_TREE;
 591
 592   code = lto_tag_to_tree_code (tag);
 593
 594   /* We should never see an SSA_NAME tree.  Only the version numbers of
 595      SSA names are ever written out.  See input_ssa_names.  */
 596   gcc_assert (code != SSA_NAME);
 597
 598   /* Instantiate a new tree using the header data.  */
 599   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
 600     result = streamer_read_string_cst (data_in, ib);
 601   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
 602     result = input_identifier (data_in, ib);
 603   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 604     {
 605       HOST_WIDE_INT len = streamer_read_hwi (ib);
 606       result = make_tree_vec (len);
 607     }
 608   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 609     {
 610       bitpack_d bp = streamer_read_bitpack (ib);
 611       unsigned int log2_npatterns = bp_unpack_value (&bp, 8);
 612       unsigned int nelts_per_pattern = bp_unpack_value (&bp, 8);
 613       result = make_vector (log2_npatterns, nelts_per_pattern);
 614     }
 615   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 616     {
 617       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 618       result = make_tree_binfo (len);
 619     }
 620   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 621     {
 622       unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
 623       unsigned HOST_WIDE_INT ext_len = streamer_read_uhwi (ib);
 624       result = make_int_cst (len, ext_len);
 625     }
 626   else if (code == CALL_EXPR)
 627     {
 628       unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
 629       return build_vl_exp (CALL_EXPR, nargs + 3);
 630     }
 631   else if (code == OMP_CLAUSE)
 632     {
 633       enum omp_clause_code subcode
 634         = (enum omp_clause_code) streamer_read_uhwi (ib);
 635       return build_omp_clause (UNKNOWN_LOCATION, subcode);
 636     }
 637   else
 638     {
 639       /* For all other nodes, materialize the tree with a raw
 640          make_node call.  */
 641       result = make_node (code);
 642     }
 643
 644   return result;
 645 }
 646
 647
 648 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
 649    block IB.  DATA_IN contains tables and descriptors for the
 650    file being read.  */
 651
 652
 653 static void
 654 lto_input_ts_common_tree_pointers (class lto_input_block *ib,
 655                                    class data_in *data_in, tree expr)
 656 {
 657   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 658     TREE_TYPE (expr) = stream_read_tree_ref (ib, data_in);
 659 }
 660
 661
 662 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
 663    block IB.  DATA_IN contains tables and descriptors for the
 664    file being read.  */
 665
 666 static void
 667 lto_input_ts_vector_tree_pointers (class lto_input_block *ib,
 668                                    class data_in *data_in, tree expr)
 669 {
 670   unsigned int count = vector_cst_encoded_nelts (expr);
 671   for (unsigned int i = 0; i < count; ++i)
 672     VECTOR_CST_ENCODED_ELT (expr, i) = stream_read_tree_ref (ib, data_in);
 673 }
 674
 675
 676 /* Read all pointer fields in the TS_POLY_INT_CST structure of EXPR from
 677    input block IB.  DATA_IN contains tables and descriptors for the
 678    file being read.  */
 679
 680 static void
 681 lto_input_ts_poly_tree_pointers (class lto_input_block *ib,
 682                                  class data_in *data_in, tree expr)
 683 {
 684   for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i)
 685     POLY_INT_CST_COEFF (expr, i) = stream_read_tree_ref (ib, data_in);
 686 }
 687
 688
 689 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
 690    block IB.  DATA_IN contains tables and descriptors for the
 691    file being read.  */
 692
 693 static void
 694 lto_input_ts_complex_tree_pointers (class lto_input_block *ib,
 695                                     class data_in *data_in, tree expr)
 696 {
 697   TREE_REALPART (expr) = stream_read_tree_ref (ib, data_in);
 698   TREE_IMAGPART (expr) = stream_read_tree_ref (ib, data_in);
 699 }
 700
 701
 702 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 703    from input block IB.  DATA_IN contains tables and descriptors for the
 704    file being read.  */
 705
 706 static void
 707 lto_input_ts_decl_minimal_tree_pointers (class lto_input_block *ib,
 708                                          class data_in *data_in, tree expr)
 709 {
 710   DECL_NAME (expr) = stream_read_tree_ref (ib, data_in);
 711   DECL_CONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 712 }
 713
 714
 715 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
 716    input block IB.  DATA_IN contains tables and descriptors for the
 717    file being read.  */
 718
 719 static void
 720 lto_input_ts_decl_common_tree_pointers (class lto_input_block *ib,
 721                                         class data_in *data_in, tree expr)
 722 {
 723   DECL_SIZE (expr) = stream_read_tree_ref (ib, data_in);
 724   DECL_SIZE_UNIT (expr) = stream_read_tree_ref (ib, data_in);
 725   DECL_ATTRIBUTES (expr) = stream_read_tree_ref (ib, data_in);
 726   DECL_ABSTRACT_ORIGIN (expr) = stream_read_tree_ref (ib, data_in);
 727
 728   if ((VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 729       && DECL_HAS_VALUE_EXPR_P (expr))
 730     SET_DECL_VALUE_EXPR (expr, stream_read_tree_ref (ib, data_in));
 731
 732   if (VAR_P (expr)
 733       && DECL_HAS_DEBUG_EXPR_P (expr))
 734     {
 735       tree dexpr = stream_read_tree_ref (ib, data_in);
 736       if (dexpr)
 737         SET_DECL_DEBUG_EXPR (expr, dexpr);
 738     }
 739 }
 740
 741
 742 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
 743    EXPR 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_non_common_tree_pointers (class lto_input_block *,
 748                                             class data_in *, tree)
 749 {
 750 }
 751
 752
 753 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 754    from input block IB.  DATA_IN contains tables and descriptors for the
 755    file being read.  */
 756
 757 static void
 758 lto_input_ts_decl_with_vis_tree_pointers (class lto_input_block *ib,
 759                                           class data_in *data_in, tree expr)
 760 {
 761   tree id;
 762
 763   id = stream_read_tree_ref (ib, data_in);
 764   if (id)
 765     {
 766       gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
 767       SET_DECL_ASSEMBLER_NAME (expr, id);
 768     }
 769 }
 770
 771
 772 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
 773    input block IB.  DATA_IN contains tables and descriptors for the
 774    file being read.  */
 775
 776 static void
 777 lto_input_ts_field_decl_tree_pointers (class lto_input_block *ib,
 778                                        class data_in *data_in, tree expr)
 779 {
 780   DECL_FIELD_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 781   DECL_BIT_FIELD_TYPE (expr) = stream_read_tree_ref (ib, data_in);
 782   DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree_ref (ib, data_in);
 783   DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 784 }
 785
 786
 787 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 788    from input block IB.  DATA_IN contains tables and descriptors for the
 789    file being read.  */
 790
 791 static void
 792 lto_input_ts_function_decl_tree_pointers (class lto_input_block *ib,
 793                                           class data_in *data_in, tree expr)
 794 {
 795   /* DECL_STRUCT_FUNCTION is loaded on demand by cgraph_get_body.  */
 796   DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree_ref (ib, data_in);
 797 #ifndef ACCEL_COMPILER
 798   DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree_ref (ib, data_in);
 799 #endif
 800   DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr)
 801     = stream_read_tree_ref (ib, data_in);
 802 #ifdef ACCEL_COMPILER
 803   {
 804     tree opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr);
 805     if (opts)
 806       {
 807         struct gcc_options tmp, tmp_set;
 808         init_options_struct (&tmp, NULL);
 809         memset (&tmp_set, 0, sizeof (tmp_set));
 810         cl_optimization_restore (&tmp, &tmp_set, TREE_OPTIMIZATION (opts));
 811         finish_options (&tmp, &tmp_set, UNKNOWN_LOCATION);
 812         opts = build_optimization_node (&tmp, &tmp_set);
 813         DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = opts;
 814       }
 815   }
 816 #endif
 817 }
 818
 819
 820 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
 821    input block IB.  DATA_IN contains tables and descriptors for the file
 822    being read.  */
 823
 824 static void
 825 lto_input_ts_type_common_tree_pointers (class lto_input_block *ib,
 826                                         class data_in *data_in, tree expr)
 827 {
 828   TYPE_SIZE (expr) = stream_read_tree_ref (ib, data_in);
 829   TYPE_SIZE_UNIT (expr) = stream_read_tree_ref (ib, data_in);
 830   TYPE_ATTRIBUTES (expr) = stream_read_tree_ref (ib, data_in);
 831   TYPE_NAME (expr) = stream_read_tree_ref (ib, data_in);
 832   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 833      reconstructed during fixup.  */
 834   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 835      during fixup.  */
 836   TYPE_MAIN_VARIANT (expr) = stream_read_tree_ref (ib, data_in);
 837   TYPE_CONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 838   /* TYPE_CANONICAL gets re-computed during type merging.  */
 839   TYPE_CANONICAL (expr) = NULL_TREE;
 840 }
 841
 842 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 843    from input block IB.  DATA_IN contains tables and descriptors for the
 844    file being read.  */
 845
 846 static void
 847 lto_input_ts_type_non_common_tree_pointers (class lto_input_block *ib,
 848                                             class data_in *data_in,
 849                                             tree expr)
 850 {
 851   if (TREE_CODE (expr) == ARRAY_TYPE)
 852     TYPE_DOMAIN (expr) = stream_read_tree_ref (ib, data_in);
 853   else if (RECORD_OR_UNION_TYPE_P (expr))
 854     TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
 855   else if (TREE_CODE (expr) == FUNCTION_TYPE
 856            || TREE_CODE (expr) == METHOD_TYPE)
 857     TYPE_ARG_TYPES (expr) = stream_read_tree_ref (ib, data_in);
 858
 859   if (!POINTER_TYPE_P (expr))
 860     TYPE_MIN_VALUE_RAW (expr) = stream_read_tree_ref (ib, data_in);
 861   TYPE_MAX_VALUE_RAW (expr) = stream_read_tree_ref (ib, data_in);
 862 }
 863
 864
 865 /* Read all pointer fields in the TS_LIST structure of EXPR from input
 866    block IB.  DATA_IN contains tables and descriptors for the
 867    file being read.  */
 868
 869 static void
 870 lto_input_ts_list_tree_pointers (class lto_input_block *ib,
 871                                  class data_in *data_in, tree expr)
 872 {
 873   TREE_PURPOSE (expr) = stream_read_tree_ref (ib, data_in);
 874   TREE_VALUE (expr) = stream_read_tree_ref (ib, data_in);
 875   TREE_CHAIN (expr) = stream_read_tree_ref (ib, data_in);
 876 }
 877
 878
 879 /* Read all pointer fields in the TS_VEC structure of EXPR from input
 880    block IB.  DATA_IN contains tables and descriptors for the
 881    file being read.  */
 882
 883 static void
 884 lto_input_ts_vec_tree_pointers (class lto_input_block *ib,
 885                                 class data_in *data_in, tree expr)
 886 {
 887   int i;
 888
 889   /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
 890      instantiate EXPR.  */
 891   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 892     TREE_VEC_ELT (expr, i) = stream_read_tree_ref (ib, data_in);
 893 }
 894
 895
 896 /* Read all pointer fields in the TS_EXP structure of EXPR from input
 897    block IB.  DATA_IN contains tables and descriptors for the
 898    file being read.  */
 899
 900
 901 static void
 902 lto_input_ts_exp_tree_pointers (class lto_input_block *ib,
 903                                 class data_in *data_in, tree expr)
 904 {
 905   int i;
 906   tree block;
 907
 908   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 909     TREE_OPERAND (expr, i) = stream_read_tree_ref (ib, data_in);
 910
 911   block = stream_read_tree_ref (ib, data_in);
 912
 913   /* TODO: Block is stored in the locus information.  It may make more sense to
 914      to make it go via the location cache.  */
 915   if (block)
 916     {
 917       data_in->location_cache.apply_location_cache ();
 918       TREE_SET_BLOCK (expr, block);
 919     }
 920 }
 921
 922
 923 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
 924    block IB.  DATA_IN contains tables and descriptors for the
 925    file being read.  */
 926
 927 static void
 928 lto_input_ts_block_tree_pointers (class lto_input_block *ib,
 929                                   class data_in *data_in, tree expr)
 930 {
 931   BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
 932
 933   BLOCK_SUPERCONTEXT (expr) = stream_read_tree_ref (ib, data_in);
 934   BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree_ref (ib, data_in);
 935   /* We may end up prevailing a decl with DECL_ORIGIN (t) != t here
 936      which breaks the invariant that BLOCK_ABSTRACT_ORIGIN is the
 937      ultimate origin.  Fixup here.
 938      ???  This should get fixed with moving to DIE references.  */
 939   if (DECL_P (BLOCK_ORIGIN (expr)))
 940     BLOCK_ABSTRACT_ORIGIN (expr) = DECL_ORIGIN (BLOCK_ABSTRACT_ORIGIN (expr));
 941   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 942      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 943      dwarf2out.c.  */
 944
 945   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 946      streaming time.  */
 947
 948   /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
 949      of streaming it.  For non-BLOCK BLOCK_SUPERCONTEXTs we still
 950      stream the child relationship explicitly.  */
 951   if (BLOCK_SUPERCONTEXT (expr)
 952       && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
 953     {
 954       BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
 955       BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
 956     }
 957
 958   /* The global block is rooted at the TU decl.  Hook it here to
 959      avoid the need to stream in this block during WPA time.  */
 960   else if (BLOCK_SUPERCONTEXT (expr)
 961            && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
 962     DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
 963
 964   /* The function-level block is connected at the time we read in
 965      function bodies for the same reason.  */
 966 }
 967
 968
 969 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
 970    block IB.  DATA_IN contains tables and descriptors for the
 971    file being read.  */
 972
 973 static void
 974 lto_input_ts_binfo_tree_pointers (class lto_input_block *ib,
 975                                   class data_in *data_in, tree expr)
 976 {
 977   tree t;
 978
 979   /* Note that the number of slots in EXPR was read in
 980      streamer_alloc_tree when instantiating EXPR.  However, the
 981      vector is empty so we cannot rely on vec::length to know how many
 982      elements to read.  So, this list is emitted as a 0-terminated
 983      list on the writer side.  */
 984   do
 985     {
 986       t = stream_read_tree_ref (ib, data_in);
 987       if (t)
 988         BINFO_BASE_BINFOS (expr)->quick_push (t);
 989     }
 990   while (t);
 991
 992   BINFO_OFFSET (expr) = stream_read_tree_ref (ib, data_in);
 993   BINFO_VTABLE (expr) = stream_read_tree_ref (ib, data_in);
 994
 995   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX,
 996      BINFO_BASE_ACCESSES and BINFO_VPTR_INDEX; these are used by C++ FE
 997      only.  */
 998 }
 999
1000
1001 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
1002    input block IB.  DATA_IN contains tables and descriptors for the
1003    file being read.  */
1004
1005 static void
1006 lto_input_ts_constructor_tree_pointers (class lto_input_block *ib,
1007                                         class data_in *data_in, tree expr)
1008 {
1009   unsigned i;
1010
1011   for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
1012     {
1013       constructor_elt e;
1014       e.index = stream_read_tree_ref (ib, data_in);
1015       e.value = stream_read_tree_ref (ib, data_in);
1016       (*CONSTRUCTOR_ELTS (expr))[i] = e;
1017     }
1018 }
1019
1020
1021 /* Read all pointer fields in the TS_OMP_CLAUSE structure of EXPR from
1022    input block IB.  DATA_IN contains tables and descriptors for the
1023    file being read.  */
1024
1025 static void
1026 lto_input_ts_omp_clause_tree_pointers (class lto_input_block *ib,
1027                                        class data_in *data_in, tree expr)
1028 {
1029   int i;
1030
1031   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
1032     OMP_CLAUSE_OPERAND (expr, i) = stream_read_tree_ref (ib, data_in);
1033   OMP_CLAUSE_CHAIN (expr) = stream_read_tree_ref (ib, data_in);
1034 }
1035
1036
1037 /* Read all pointer fields in EXPR from input block IB.  DATA_IN
1038    contains tables and descriptors for the file being read.  */
1039
1040 void
1041 streamer_read_tree_body (class lto_input_block *ib, class data_in *data_in,
1042                          tree expr)
1043 {
1044   enum tree_code code;
1045
1046   code = TREE_CODE (expr);
1047
1048   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
1049     lto_input_ts_common_tree_pointers (ib, data_in, expr);
1050
1051   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1052     lto_input_ts_vector_tree_pointers (ib, data_in, expr);
1053
1054   if (CODE_CONTAINS_STRUCT (code, TS_POLY_INT_CST))
1055     lto_input_ts_poly_tree_pointers (ib, data_in, expr);
1056
1057   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
1058     lto_input_ts_complex_tree_pointers (ib, data_in, expr);
1059
1060   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
1061     lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
1062
1063   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
1064     lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
1065
1066   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
1067     lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
1068
1069   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
1070     lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
1071
1072   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
1073     lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
1074
1075   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
1076     lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
1077
1078   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
1079     lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
1080
1081   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1082     lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1083
1084   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1085     lto_input_ts_list_tree_pointers (ib, data_in, expr);
1086
1087   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1088     lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1089
1090   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1091     lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1092
1093   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1094     lto_input_ts_block_tree_pointers (ib, data_in, expr);
1095
1096   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1097     lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1098
1099   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1100     lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1101
1102   if (code == OMP_CLAUSE)
1103     lto_input_ts_omp_clause_tree_pointers (ib, data_in, expr);
1104 }
1105
1106
1107 /* Read an index IX from input block IB and return the tree node at
1108    DATA_IN->FILE_DATA->GLOBALS_INDEX[IX].  */
1109
1110 tree
1111 streamer_get_pickled_tree (class lto_input_block *ib, class data_in *data_in)
1112 {
1113   unsigned HOST_WIDE_INT ix;
1114   tree result;
1115   enum LTO_tags expected_tag;
1116
1117   ix = streamer_read_uhwi (ib);
1118   result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1119
1120   if (streamer_debugging)
1121     {
1122       expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1123       gcc_assert (result
1124                   && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1125     }
1126
1127   return result;
1128 }