gcc/tree-streamer-out.c

   1 /* Routines for emitting trees to a file stream.
   2
   3    Copyright (C) 2011-2014 Free Software Foundation, Inc.
   4    Contributed by Diego Novillo <dnovillo@google.com>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "diagnostic.h"
  27 #include "tree.h"
  28 #include "stor-layout.h"
  29 #include "basic-block.h"
  30 #include "tree-ssa-alias.h"
  31 #include "internal-fn.h"
  32 #include "gimple-expr.h"
  33 #include "is-a.h"
  34 #include "gimple.h"
  35 #include "tree-streamer.h"
  36 #include "data-streamer.h"
  37 #include "streamer-hooks.h"
  38
  39 /* Output the STRING constant to the string
  40    table in OB.  Then put the index onto the INDEX_STREAM.  */
  41
  42 void
  43 streamer_write_string_cst (struct output_block *ob,
  44                            struct lto_output_stream *index_stream,
  45                            tree string)
  46 {
  47   streamer_write_string_with_length (ob, index_stream,
  48                                      string ? TREE_STRING_POINTER (string)
  49                                             : NULL,
  50                                      string ? TREE_STRING_LENGTH (string) : 0,
  51                                      true);
  52 }
  53
  54
  55 /* Output the identifier ID to the string
  56    table in OB.  Then put the index onto the INDEX_STREAM.  */
  57
  58 static void
  59 write_identifier (struct output_block *ob,
  60                    struct lto_output_stream *index_stream,
  61                    tree id)
  62 {
  63   streamer_write_string_with_length (ob, index_stream,
  64                                      IDENTIFIER_POINTER (id),
  65                                      IDENTIFIER_LENGTH (id),
  66                                      true);
  67 }
  68
  69
  70 /* Pack all the non-pointer fields of the TS_BASE structure of
  71    expression EXPR into bitpack BP.  */
  72
  73 static void
  74 pack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
  75 {
  76   bp_pack_value (bp, TREE_CODE (expr), 16);
  77   if (!TYPE_P (expr))
  78     {
  79       bp_pack_value (bp, TREE_SIDE_EFFECTS (expr), 1);
  80       bp_pack_value (bp, TREE_CONSTANT (expr), 1);
  81       bp_pack_value (bp, TREE_READONLY (expr), 1);
  82
  83       /* TREE_PUBLIC is used on types to indicate that the type
  84          has a TYPE_CACHED_VALUES vector.  This is not streamed out,
  85          so we skip it here.  */
  86       bp_pack_value (bp, TREE_PUBLIC (expr), 1);
  87     }
  88   else
  89     bp_pack_value (bp, 0, 4);
  90   bp_pack_value (bp, TREE_ADDRESSABLE (expr), 1);
  91   bp_pack_value (bp, TREE_THIS_VOLATILE (expr), 1);
  92   if (DECL_P (expr))
  93     bp_pack_value (bp, DECL_UNSIGNED (expr), 1);
  94   else if (TYPE_P (expr))
  95     bp_pack_value (bp, TYPE_UNSIGNED (expr), 1);
  96   else
  97     bp_pack_value (bp, 0, 1);
  98   /* We write debug info two times, do not confuse the second one.
  99      The only relevant TREE_ASM_WRITTEN use is on SSA names.  */
 100   bp_pack_value (bp, (TREE_CODE (expr) != SSA_NAME
 101                       ? 0 : TREE_ASM_WRITTEN (expr)), 1);
 102   if (TYPE_P (expr))
 103     bp_pack_value (bp, TYPE_ARTIFICIAL (expr), 1);
 104   else
 105     bp_pack_value (bp, TREE_NO_WARNING (expr), 1);
 106   bp_pack_value (bp, TREE_NOTHROW (expr), 1);
 107   bp_pack_value (bp, TREE_STATIC (expr), 1);
 108   if (TREE_CODE (expr) != TREE_BINFO)
 109     bp_pack_value (bp, TREE_PRIVATE (expr), 1);
 110   bp_pack_value (bp, TREE_PROTECTED (expr), 1);
 111   bp_pack_value (bp, TREE_DEPRECATED (expr), 1);
 112   if (TYPE_P (expr))
 113     {
 114       bp_pack_value (bp, TYPE_SATURATING (expr), 1);
 115       bp_pack_value (bp, TYPE_ADDR_SPACE (expr), 8);
 116     }
 117   else if (TREE_CODE (expr) == SSA_NAME)
 118     bp_pack_value (bp, SSA_NAME_IS_DEFAULT_DEF (expr), 1);
 119   else
 120     bp_pack_value (bp, 0, 1);
 121 }
 122
 123
 124 /* Pack all the non-pointer fields of the TS_INTEGER_CST structure of
 125    expression EXPR into bitpack BP.  */
 126
 127 static void
 128 pack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
 129 {
 130   int i;
 131   /* Note that the number of elements has already been written out in
 132      streamer_write_tree_header.  */
 133   for (i = 0; i < TREE_INT_CST_EXT_NUNITS (expr); i++)
 134     bp_pack_var_len_int (bp, TREE_INT_CST_ELT (expr, i));
 135 }
 136
 137
 138 /* Pack all the non-pointer fields of the TS_REAL_CST structure of
 139    expression EXPR into bitpack BP.  */
 140
 141 static void
 142 pack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
 143 {
 144   unsigned i;
 145   REAL_VALUE_TYPE r;
 146
 147   r = TREE_REAL_CST (expr);
 148   bp_pack_value (bp, r.cl, 2);
 149   bp_pack_value (bp, r.decimal, 1);
 150   bp_pack_value (bp, r.sign, 1);
 151   bp_pack_value (bp, r.signalling, 1);
 152   bp_pack_value (bp, r.canonical, 1);
 153   bp_pack_value (bp, r.uexp, EXP_BITS);
 154   for (i = 0; i < SIGSZ; i++)
 155     bp_pack_value (bp, r.sig[i], HOST_BITS_PER_LONG);
 156 }
 157
 158
 159 /* Pack all the non-pointer fields of the TS_FIXED_CST structure of
 160    expression EXPR into bitpack BP.  */
 161
 162 static void
 163 pack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 164 {
 165   struct fixed_value fv = TREE_FIXED_CST (expr);
 166   bp_pack_enum (bp, machine_mode, MAX_MACHINE_MODE, fv.mode);
 167   bp_pack_var_len_int (bp, fv.data.low);
 168   bp_pack_var_len_int (bp, fv.data.high);
 169 }
 170
 171 /* Pack all the non-pointer fields of the TS_DECL_COMMON structure
 172    of expression EXPR into bitpack BP.  */
 173
 174 static void
 175 pack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 176 {
 177   bp_pack_enum (bp, machine_mode, MAX_MACHINE_MODE, DECL_MODE (expr));
 178   bp_pack_value (bp, DECL_NONLOCAL (expr), 1);
 179   bp_pack_value (bp, DECL_VIRTUAL_P (expr), 1);
 180   bp_pack_value (bp, DECL_IGNORED_P (expr), 1);
 181   bp_pack_value (bp, DECL_ABSTRACT (expr), 1);
 182   bp_pack_value (bp, DECL_ARTIFICIAL (expr), 1);
 183   bp_pack_value (bp, DECL_USER_ALIGN (expr), 1);
 184   bp_pack_value (bp, DECL_PRESERVE_P (expr), 1);
 185   bp_pack_value (bp, DECL_EXTERNAL (expr), 1);
 186   bp_pack_value (bp, DECL_GIMPLE_REG_P (expr), 1);
 187   bp_pack_var_len_unsigned (bp, DECL_ALIGN (expr));
 188
 189   if (TREE_CODE (expr) == LABEL_DECL)
 190     {
 191       /* Note that we do not write LABEL_DECL_UID.  The reader will
 192          always assume an initial value of -1 so that the
 193          label_to_block_map is recreated by gimple_set_bb.  */
 194       bp_pack_var_len_unsigned (bp, EH_LANDING_PAD_NR (expr));
 195     }
 196
 197   if (TREE_CODE (expr) == FIELD_DECL)
 198     {
 199       bp_pack_value (bp, DECL_PACKED (expr), 1);
 200       bp_pack_value (bp, DECL_NONADDRESSABLE_P (expr), 1);
 201       bp_pack_value (bp, expr->decl_common.off_align, 8);
 202     }
 203
 204   if (TREE_CODE (expr) == VAR_DECL)
 205     {
 206       bp_pack_value (bp, DECL_HAS_DEBUG_EXPR_P (expr), 1);
 207       bp_pack_value (bp, DECL_NONLOCAL_FRAME (expr), 1);
 208     }
 209
 210   if (TREE_CODE (expr) == RESULT_DECL
 211       || TREE_CODE (expr) == PARM_DECL
 212       || TREE_CODE (expr) == VAR_DECL)
 213     {
 214       bp_pack_value (bp, DECL_BY_REFERENCE (expr), 1);
 215       if (TREE_CODE (expr) == VAR_DECL
 216           || TREE_CODE (expr) == PARM_DECL)
 217         bp_pack_value (bp, DECL_HAS_VALUE_EXPR_P (expr), 1);
 218     }
 219 }
 220
 221
 222 /* Pack all the non-pointer fields of the TS_DECL_WRTL structure
 223    of expression EXPR into bitpack BP.  */
 224
 225 static void
 226 pack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 227 {
 228   bp_pack_value (bp, DECL_REGISTER (expr), 1);
 229 }
 230
 231
 232 /* Pack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 233    of expression EXPR into bitpack BP.  */
 234
 235 static void
 236 pack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 237 {
 238   bp_pack_value (bp, DECL_COMMON (expr), 1);
 239   bp_pack_value (bp, DECL_DLLIMPORT_P (expr), 1);
 240   bp_pack_value (bp, DECL_WEAK (expr), 1);
 241   bp_pack_value (bp, DECL_SEEN_IN_BIND_EXPR_P (expr),  1);
 242   bp_pack_value (bp, DECL_COMDAT (expr),  1);
 243   bp_pack_value (bp, DECL_VISIBILITY (expr),  2);
 244   bp_pack_value (bp, DECL_VISIBILITY_SPECIFIED (expr),  1);
 245
 246   if (TREE_CODE (expr) == VAR_DECL)
 247     {
 248       bp_pack_value (bp, DECL_HARD_REGISTER (expr), 1);
 249       /* DECL_IN_TEXT_SECTION is set during final asm output only. */
 250       bp_pack_value (bp, DECL_IN_CONSTANT_POOL (expr), 1);
 251       bp_pack_value (bp, DECL_TLS_MODEL (expr),  3);
 252     }
 253
 254   if (TREE_CODE (expr) == FUNCTION_DECL)
 255     {
 256       bp_pack_value (bp, DECL_FINAL_P (expr), 1);
 257       bp_pack_value (bp, DECL_CXX_CONSTRUCTOR_P (expr), 1);
 258       bp_pack_value (bp, DECL_CXX_DESTRUCTOR_P (expr), 1);
 259     }
 260   if (VAR_OR_FUNCTION_DECL_P (expr))
 261     bp_pack_var_len_unsigned (bp, DECL_INIT_PRIORITY (expr));
 262 }
 263
 264
 265 /* Pack all the non-pointer fields of the TS_FUNCTION_DECL structure
 266    of expression EXPR into bitpack BP.  */
 267
 268 static void
 269 pack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 270 {
 271   /* For normal/md builtins we only write the class and code, so they
 272      should never be handled here.  */
 273   gcc_assert (!streamer_handle_as_builtin_p (expr));
 274
 275   bp_pack_enum (bp, built_in_class, BUILT_IN_LAST,
 276                 DECL_BUILT_IN_CLASS (expr));
 277   bp_pack_value (bp, DECL_STATIC_CONSTRUCTOR (expr), 1);
 278   bp_pack_value (bp, DECL_STATIC_DESTRUCTOR (expr), 1);
 279   bp_pack_value (bp, DECL_UNINLINABLE (expr), 1);
 280   bp_pack_value (bp, DECL_POSSIBLY_INLINED (expr), 1);
 281   bp_pack_value (bp, DECL_IS_NOVOPS (expr), 1);
 282   bp_pack_value (bp, DECL_IS_RETURNS_TWICE (expr), 1);
 283   bp_pack_value (bp, DECL_IS_MALLOC (expr), 1);
 284   bp_pack_value (bp, DECL_IS_OPERATOR_NEW (expr), 1);
 285   bp_pack_value (bp, DECL_DECLARED_INLINE_P (expr), 1);
 286   bp_pack_value (bp, DECL_STATIC_CHAIN (expr), 1);
 287   bp_pack_value (bp, DECL_NO_INLINE_WARNING_P (expr), 1);
 288   bp_pack_value (bp, DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr), 1);
 289   bp_pack_value (bp, DECL_NO_LIMIT_STACK (expr), 1);
 290   bp_pack_value (bp, DECL_DISREGARD_INLINE_LIMITS (expr), 1);
 291   bp_pack_value (bp, DECL_PURE_P (expr), 1);
 292   bp_pack_value (bp, DECL_LOOPING_CONST_OR_PURE_P (expr), 1);
 293   if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
 294     bp_pack_value (bp, DECL_FUNCTION_CODE (expr), 11);
 295   if (DECL_STATIC_DESTRUCTOR (expr))
 296     bp_pack_var_len_unsigned (bp, DECL_FINI_PRIORITY (expr));
 297 }
 298
 299
 300 /* Pack all the non-pointer fields of the TS_TYPE_COMMON structure
 301    of expression EXPR into bitpack BP.  */
 302
 303 static void
 304 pack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 305 {
 306   bp_pack_enum (bp, machine_mode, MAX_MACHINE_MODE, TYPE_MODE (expr));
 307   bp_pack_value (bp, TYPE_STRING_FLAG (expr), 1);
 308   bp_pack_value (bp, TYPE_NO_FORCE_BLK (expr), 1);
 309   bp_pack_value (bp, TYPE_NEEDS_CONSTRUCTING (expr), 1);
 310   if (RECORD_OR_UNION_TYPE_P (expr))
 311     {
 312       bp_pack_value (bp, TYPE_TRANSPARENT_AGGR (expr), 1);
 313       bp_pack_value (bp, TYPE_FINAL_P (expr), 1);
 314     }
 315   else if (TREE_CODE (expr) == ARRAY_TYPE)
 316     bp_pack_value (bp, TYPE_NONALIASED_COMPONENT (expr), 1);
 317   bp_pack_value (bp, TYPE_PACKED (expr), 1);
 318   bp_pack_value (bp, TYPE_RESTRICT (expr), 1);
 319   bp_pack_value (bp, TYPE_USER_ALIGN (expr), 1);
 320   bp_pack_value (bp, TYPE_READONLY (expr), 1);
 321   bp_pack_var_len_unsigned (bp, TYPE_PRECISION (expr));
 322   bp_pack_var_len_unsigned (bp, TYPE_ALIGN (expr));
 323   /* Make sure to preserve the fact whether the frontend would assign
 324      alias-set zero to this type.  */
 325   bp_pack_var_len_int (bp, (TYPE_ALIAS_SET (expr) == 0
 326                             || (!in_lto_p
 327                                 && get_alias_set (expr) == 0)) ? 0 : -1);
 328 }
 329
 330
 331 /* Pack all the non-pointer fields of the TS_BLOCK structure
 332    of expression EXPR into bitpack BP.  */
 333
 334 static void
 335 pack_ts_block_value_fields (struct output_block *ob,
 336                             struct bitpack_d *bp, tree expr)
 337 {
 338   bp_pack_value (bp, BLOCK_ABSTRACT (expr), 1);
 339   /* BLOCK_NUMBER is recomputed.  */
 340   /* Stream BLOCK_SOURCE_LOCATION for the limited cases we can handle - those
 341      that represent inlined function scopes.
 342      For the rest them on the floor instead of ICEing in dwarf2out.c.  */
 343   if (inlined_function_outer_scope_p (expr))
 344     stream_output_location (ob, bp, BLOCK_SOURCE_LOCATION (expr));
 345   else
 346     stream_output_location (ob, bp, UNKNOWN_LOCATION);
 347 }
 348
 349 /* Pack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL structure
 350    of expression EXPR into bitpack BP.  */
 351
 352 static void
 353 pack_ts_translation_unit_decl_value_fields (struct output_block *ob,
 354                                             struct bitpack_d *bp, tree expr)
 355 {
 356   bp_pack_string (ob, bp, TRANSLATION_UNIT_LANGUAGE (expr), true);
 357 }
 358
 359 /* Pack a TS_OPTIMIZATION tree in EXPR to BP.  */
 360
 361 static void
 362 pack_ts_optimization (struct bitpack_d *bp, tree expr)
 363 {
 364   struct cl_optimization *t = TREE_OPTIMIZATION (expr);
 365   unsigned i, len;
 366
 367   /* The cl_optimization is generated by the options
 368      awk script, so we just recreate a byte-by-byte copy here. */
 369
 370   len = sizeof (struct cl_optimization);
 371   for (i = 0; i < len; i++)
 372     bp_pack_value (bp, ((unsigned char *)t)[i], 8);
 373   /* Catch struct size mismatches between reader and writer. */
 374   bp_pack_value (bp, 0x12345678, 32);
 375 }
 376
 377
 378 /* Pack all the non-pointer fields of the TS_OMP_CLAUSE structure
 379    of expression EXPR into bitpack BP.  */
 380
 381 static void
 382 pack_ts_omp_clause_value_fields (struct output_block *ob,
 383                                  struct bitpack_d *bp, tree expr)
 384 {
 385   stream_output_location (ob, bp, OMP_CLAUSE_LOCATION (expr));
 386   switch (OMP_CLAUSE_CODE (expr))
 387     {
 388     case OMP_CLAUSE_DEFAULT:
 389       bp_pack_enum (bp, omp_clause_default_kind, OMP_CLAUSE_DEFAULT_LAST,
 390                     OMP_CLAUSE_DEFAULT_KIND (expr));
 391       break;
 392     case OMP_CLAUSE_SCHEDULE:
 393       bp_pack_enum (bp, omp_clause_schedule_kind, OMP_CLAUSE_SCHEDULE_LAST,
 394                     OMP_CLAUSE_SCHEDULE_KIND (expr));
 395       break;
 396     case OMP_CLAUSE_DEPEND:
 397       bp_pack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST,
 398                     OMP_CLAUSE_DEPEND_KIND (expr));
 399       break;
 400     case OMP_CLAUSE_MAP:
 401       bp_pack_enum (bp, omp_clause_map_kind, OMP_CLAUSE_MAP_LAST,
 402                     OMP_CLAUSE_MAP_KIND (expr));
 403       break;
 404     case OMP_CLAUSE_PROC_BIND:
 405       bp_pack_enum (bp, omp_clause_proc_bind_kind, OMP_CLAUSE_PROC_BIND_LAST,
 406                     OMP_CLAUSE_PROC_BIND_KIND (expr));
 407       break;
 408     case OMP_CLAUSE_REDUCTION:
 409       bp_pack_enum (bp, tree_code, MAX_TREE_CODES,
 410                     OMP_CLAUSE_REDUCTION_CODE (expr));
 411       break;
 412     default:
 413       break;
 414     }
 415 }
 416
 417
 418 /* Pack all the bitfields in EXPR into a bit pack.  */
 419
 420 void
 421 streamer_pack_tree_bitfields (struct output_block *ob,
 422                               struct bitpack_d *bp, tree expr)
 423 {
 424   enum tree_code code;
 425
 426   code = TREE_CODE (expr);
 427
 428   /* Note that all these functions are highly sensitive to changes in
 429      the types and sizes of each of the fields being packed.  */
 430   pack_ts_base_value_fields (bp, expr);
 431
 432   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 433     pack_ts_int_cst_value_fields (bp, expr);
 434
 435   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 436     pack_ts_real_cst_value_fields (bp, expr);
 437
 438   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 439     pack_ts_fixed_cst_value_fields (bp, expr);
 440
 441   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 442     stream_output_location (ob, bp, DECL_SOURCE_LOCATION (expr));
 443
 444   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 445     pack_ts_decl_common_value_fields (bp, expr);
 446
 447   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 448     pack_ts_decl_wrtl_value_fields (bp, expr);
 449
 450   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 451     pack_ts_decl_with_vis_value_fields (bp, expr);
 452
 453   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 454     pack_ts_function_decl_value_fields (bp, expr);
 455
 456   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 457     pack_ts_type_common_value_fields (bp, expr);
 458
 459   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 460     stream_output_location (ob, bp, EXPR_LOCATION (expr));
 461
 462   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 463     pack_ts_block_value_fields (ob, bp, expr);
 464
 465   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 466     pack_ts_translation_unit_decl_value_fields (ob, bp, expr);
 467
 468   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
 469     gcc_unreachable ();
 470
 471   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 472     pack_ts_optimization (bp, expr);
 473
 474   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 475     bp_pack_var_len_unsigned (bp, vec_safe_length (BINFO_BASE_ACCESSES (expr)));
 476
 477   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 478     bp_pack_var_len_unsigned (bp, CONSTRUCTOR_NELTS (expr));
 479
 480   if (code == OMP_CLAUSE)
 481     pack_ts_omp_clause_value_fields (ob, bp, expr);
 482 }
 483
 484
 485 /* Write the code and class of builtin EXPR to output block OB.  IX is
 486    the index into the streamer cache where EXPR is stored.*/
 487
 488 void
 489 streamer_write_builtin (struct output_block *ob, tree expr)
 490 {
 491   gcc_assert (streamer_handle_as_builtin_p (expr));
 492
 493   if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD
 494       && !targetm.builtin_decl)
 495     sorry ("tree bytecode streams do not support machine specific builtin "
 496            "functions on this target");
 497
 498   streamer_write_record_start (ob, LTO_builtin_decl);
 499   streamer_write_enum (ob->main_stream, built_in_class, BUILT_IN_LAST,
 500                        DECL_BUILT_IN_CLASS (expr));
 501   streamer_write_uhwi (ob, DECL_FUNCTION_CODE (expr));
 502
 503   if (DECL_ASSEMBLER_NAME_SET_P (expr))
 504     {
 505       /* When the assembler name of a builtin gets a user name,
 506          the new name is always prefixed with '*' by
 507          set_builtin_user_assembler_name.  So, to prevent the
 508          reader side from adding a second '*', we omit it here.  */
 509       const char *str = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (expr));
 510       if (strlen (str) > 1 && str[0] == '*')
 511         streamer_write_string (ob, ob->main_stream, &str[1], true);
 512       else
 513         streamer_write_string (ob, ob->main_stream, NULL, true);
 514     }
 515   else
 516     streamer_write_string (ob, ob->main_stream, NULL, true);
 517 }
 518
 519
 520 /* Emit the chain of tree nodes starting at T.  OB is the output block
 521    to write to.  REF_P is true if chain elements should be emitted
 522    as references.  */
 523
 524 void
 525 streamer_write_chain (struct output_block *ob, tree t, bool ref_p)
 526 {
 527   while (t)
 528     {
 529       /* We avoid outputting external vars or functions by reference
 530          to the global decls section as we do not want to have them
 531          enter decl merging.  This is, of course, only for the call
 532          for streaming BLOCK_VARS, but other callers are safe.  */
 533       /* ???  FIXME wrt SCC streaming.  Drop these for now.  */
 534       if (VAR_OR_FUNCTION_DECL_P (t)
 535           && DECL_EXTERNAL (t))
 536         ; /* stream_write_tree_shallow_non_ref (ob, t, ref_p); */
 537       else
 538         stream_write_tree (ob, t, ref_p);
 539
 540       t = TREE_CHAIN (t);
 541     }
 542
 543   /* Write a sentinel to terminate the chain.  */
 544   stream_write_tree (ob, NULL_TREE, ref_p);
 545 }
 546
 547
 548 /* Write all pointer fields in the TS_COMMON structure of EXPR to output
 549    block OB.  If REF_P is true, write a reference to EXPR's pointer
 550    fields.  */
 551
 552 static void
 553 write_ts_common_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 554 {
 555   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 556     stream_write_tree (ob, TREE_TYPE (expr), ref_p);
 557 }
 558
 559
 560 /* Write all pointer fields in the TS_VECTOR structure of EXPR to output
 561    block OB.  If REF_P is true, write a reference to EXPR's pointer
 562    fields.  */
 563
 564 static void
 565 write_ts_vector_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 566 {
 567   unsigned i;
 568   /* Note that the number of elements for EXPR has already been emitted
 569      in EXPR's header (see streamer_write_tree_header).  */
 570   for (i = 0; i < VECTOR_CST_NELTS (expr); ++i)
 571     stream_write_tree (ob, VECTOR_CST_ELT (expr, i), ref_p);
 572 }
 573
 574
 575 /* Write all pointer fields in the TS_COMPLEX structure of EXPR to output
 576    block OB.  If REF_P is true, write a reference to EXPR's pointer
 577    fields.  */
 578
 579 static void
 580 write_ts_complex_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 581 {
 582   stream_write_tree (ob, TREE_REALPART (expr), ref_p);
 583   stream_write_tree (ob, TREE_IMAGPART (expr), ref_p);
 584 }
 585
 586
 587 /* Write all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 588    to output block OB.  If REF_P is true, write a reference to EXPR's
 589    pointer fields.  */
 590
 591 static void
 592 write_ts_decl_minimal_tree_pointers (struct output_block *ob, tree expr,
 593                                      bool ref_p)
 594 {
 595   /* Drop names that were created for anonymous entities.  */
 596   if (DECL_NAME (expr)
 597       && TREE_CODE (DECL_NAME (expr)) == IDENTIFIER_NODE
 598       && ANON_AGGRNAME_P (DECL_NAME (expr)))
 599     stream_write_tree (ob, NULL_TREE, ref_p);
 600   else
 601     stream_write_tree (ob, DECL_NAME (expr), ref_p);
 602   stream_write_tree (ob, DECL_CONTEXT (expr), ref_p);
 603 }
 604
 605
 606 /* Write all pointer fields in the TS_DECL_COMMON structure of EXPR to
 607    output block OB.  If REF_P is true, write a reference to EXPR's
 608    pointer fields.  */
 609
 610 static void
 611 write_ts_decl_common_tree_pointers (struct output_block *ob, tree expr,
 612                                     bool ref_p)
 613 {
 614   stream_write_tree (ob, DECL_SIZE (expr), ref_p);
 615   stream_write_tree (ob, DECL_SIZE_UNIT (expr), ref_p);
 616
 617   /* Note, DECL_INITIAL is not handled here.  Since DECL_INITIAL needs
 618      special handling in LTO, it must be handled by streamer hooks.  */
 619
 620   stream_write_tree (ob, DECL_ATTRIBUTES (expr), ref_p);
 621
 622   /* Do not stream DECL_ABSTRACT_ORIGIN.  We cannot handle debug information
 623      for early inlining so drop it on the floor instead of ICEing in
 624      dwarf2out.c.  */
 625
 626   if ((TREE_CODE (expr) == VAR_DECL
 627        || TREE_CODE (expr) == PARM_DECL)
 628       && DECL_HAS_VALUE_EXPR_P (expr))
 629     stream_write_tree (ob, DECL_VALUE_EXPR (expr), ref_p);
 630
 631   if (TREE_CODE (expr) == VAR_DECL)
 632     stream_write_tree (ob, DECL_DEBUG_EXPR (expr), ref_p);
 633 }
 634
 635
 636 /* Write all pointer fields in the TS_DECL_NON_COMMON structure of
 637    EXPR to output block OB.  If REF_P is true, write a reference to EXPR's
 638    pointer fields.  */
 639
 640 static void
 641 write_ts_decl_non_common_tree_pointers (struct output_block *ob, tree expr,
 642                                         bool ref_p)
 643 {
 644   if (TREE_CODE (expr) == TYPE_DECL)
 645     stream_write_tree (ob, DECL_ORIGINAL_TYPE (expr), ref_p);
 646   stream_write_tree (ob, DECL_VINDEX (expr), ref_p);
 647 }
 648
 649
 650 /* Write all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 651    to output block OB.  If REF_P is true, write a reference to EXPR's
 652    pointer fields.  */
 653
 654 static void
 655 write_ts_decl_with_vis_tree_pointers (struct output_block *ob, tree expr,
 656                                       bool ref_p)
 657 {
 658   /* Make sure we don't inadvertently set the assembler name.  */
 659   if (DECL_ASSEMBLER_NAME_SET_P (expr))
 660     stream_write_tree (ob, DECL_ASSEMBLER_NAME (expr), ref_p);
 661   else
 662     stream_write_tree (ob, NULL_TREE, false);
 663
 664   stream_write_tree (ob, DECL_SECTION_NAME (expr), ref_p);
 665 }
 666
 667
 668 /* Write all pointer fields in the TS_FIELD_DECL structure of EXPR to
 669    output block OB.  If REF_P is true, write a reference to EXPR's
 670    pointer fields.  */
 671
 672 static void
 673 write_ts_field_decl_tree_pointers (struct output_block *ob, tree expr,
 674                                    bool ref_p)
 675 {
 676   stream_write_tree (ob, DECL_FIELD_OFFSET (expr), ref_p);
 677   stream_write_tree (ob, DECL_BIT_FIELD_TYPE (expr), ref_p);
 678   stream_write_tree (ob, DECL_BIT_FIELD_REPRESENTATIVE (expr), ref_p);
 679   stream_write_tree (ob, DECL_FIELD_BIT_OFFSET (expr), ref_p);
 680   stream_write_tree (ob, DECL_FCONTEXT (expr), ref_p);
 681 }
 682
 683
 684 /* Write all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 685    to output block OB.  If REF_P is true, write a reference to EXPR's
 686    pointer fields.  */
 687
 688 static void
 689 write_ts_function_decl_tree_pointers (struct output_block *ob, tree expr,
 690                                       bool ref_p)
 691 {
 692   /* DECL_STRUCT_FUNCTION is handled by lto_output_function.  FIXME lto,
 693      maybe it should be handled here?  */
 694   stream_write_tree (ob, DECL_FUNCTION_PERSONALITY (expr), ref_p);
 695   /* DECL_FUNCTION_SPECIFIC_TARGET is regenerated.  */
 696   stream_write_tree (ob, DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr), ref_p);
 697 }
 698
 699
 700 /* Write all pointer fields in the TS_TYPE_COMMON structure of EXPR to
 701    output block OB.  If REF_P is true, write a reference to EXPR's
 702    pointer fields.  */
 703
 704 static void
 705 write_ts_type_common_tree_pointers (struct output_block *ob, tree expr,
 706                                     bool ref_p)
 707 {
 708   stream_write_tree (ob, TYPE_SIZE (expr), ref_p);
 709   stream_write_tree (ob, TYPE_SIZE_UNIT (expr), ref_p);
 710   stream_write_tree (ob, TYPE_ATTRIBUTES (expr), ref_p);
 711   stream_write_tree (ob, TYPE_NAME (expr), ref_p);
 712   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 713      reconstructed during fixup.  */
 714   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 715      during fixup.  */
 716   stream_write_tree (ob, TYPE_MAIN_VARIANT (expr), ref_p);
 717   stream_write_tree (ob, TYPE_CONTEXT (expr), ref_p);
 718   /* TYPE_CANONICAL is re-computed during type merging, so no need
 719      to stream it here.  */
 720   stream_write_tree (ob, TYPE_STUB_DECL (expr), ref_p);
 721 }
 722
 723 /* Write all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 724    to output block OB.  If REF_P is true, write a reference to EXPR's
 725    pointer fields.  */
 726
 727 static void
 728 write_ts_type_non_common_tree_pointers (struct output_block *ob, tree expr,
 729                                         bool ref_p)
 730 {
 731   if (TREE_CODE (expr) == ENUMERAL_TYPE)
 732     stream_write_tree (ob, TYPE_VALUES (expr), ref_p);
 733   else if (TREE_CODE (expr) == ARRAY_TYPE)
 734     stream_write_tree (ob, TYPE_DOMAIN (expr), ref_p);
 735   else if (RECORD_OR_UNION_TYPE_P (expr))
 736     streamer_write_chain (ob, TYPE_FIELDS (expr), ref_p);
 737   else if (TREE_CODE (expr) == FUNCTION_TYPE
 738            || TREE_CODE (expr) == METHOD_TYPE)
 739     stream_write_tree (ob, TYPE_ARG_TYPES (expr), ref_p);
 740
 741   if (!POINTER_TYPE_P (expr))
 742     stream_write_tree (ob, TYPE_MINVAL (expr), ref_p);
 743   stream_write_tree (ob, TYPE_MAXVAL (expr), ref_p);
 744   if (RECORD_OR_UNION_TYPE_P (expr))
 745     stream_write_tree (ob, TYPE_BINFO (expr), ref_p);
 746 }
 747
 748
 749 /* Write all pointer fields in the TS_LIST structure of EXPR to output
 750    block OB.  If REF_P is true, write a reference to EXPR's pointer
 751    fields.  */
 752
 753 static void
 754 write_ts_list_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 755 {
 756   stream_write_tree (ob, TREE_PURPOSE (expr), ref_p);
 757   stream_write_tree (ob, TREE_VALUE (expr), ref_p);
 758   stream_write_tree (ob, TREE_CHAIN (expr), ref_p);
 759 }
 760
 761
 762 /* Write all pointer fields in the TS_VEC structure of EXPR to output
 763    block OB.  If REF_P is true, write a reference to EXPR's pointer
 764    fields.  */
 765
 766 static void
 767 write_ts_vec_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 768 {
 769   int i;
 770
 771   /* Note that the number of slots for EXPR has already been emitted
 772      in EXPR's header (see streamer_write_tree_header).  */
 773   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 774     stream_write_tree (ob, TREE_VEC_ELT (expr, i), ref_p);
 775 }
 776
 777
 778 /* Write all pointer fields in the TS_EXP structure of EXPR to output
 779    block OB.  If REF_P is true, write a reference to EXPR's pointer
 780    fields.  */
 781
 782 static void
 783 write_ts_exp_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 784 {
 785   int i;
 786
 787   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 788     stream_write_tree (ob, TREE_OPERAND (expr, i), ref_p);
 789   stream_write_tree (ob, TREE_BLOCK (expr), ref_p);
 790 }
 791
 792
 793 /* Write all pointer fields in the TS_BLOCK structure of EXPR to output
 794    block OB.  If REF_P is true, write a reference to EXPR's pointer
 795    fields.  */
 796
 797 static void
 798 write_ts_block_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 799 {
 800   streamer_write_chain (ob, BLOCK_VARS (expr), ref_p);
 801
 802   stream_write_tree (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
 803
 804   /* Stream BLOCK_ABSTRACT_ORIGIN for the limited cases we can handle - those
 805      that represent inlined function scopes.
 806      For the rest them on the floor instead of ICEing in dwarf2out.c.  */
 807   if (inlined_function_outer_scope_p (expr))
 808     {
 809       tree ultimate_origin = block_ultimate_origin (expr);
 810       stream_write_tree (ob, ultimate_origin, ref_p);
 811     }
 812   else
 813     stream_write_tree (ob, NULL_TREE, ref_p);
 814   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 815      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 816      dwarf2out.c.  */
 817
 818   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 819      streaming time.  */
 820
 821   /* Do not output BLOCK_SUBBLOCKS.  Instead on streaming-in this
 822      list is re-constructed from BLOCK_SUPERCONTEXT.  */
 823 }
 824
 825
 826 /* Write all pointer fields in the TS_BINFO structure of EXPR to output
 827    block OB.  If REF_P is true, write a reference to EXPR's pointer
 828    fields.  */
 829
 830 static void
 831 write_ts_binfo_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 832 {
 833   unsigned i;
 834   tree t;
 835
 836   /* Note that the number of BINFO slots has already been emitted in
 837      EXPR's header (see streamer_write_tree_header) because this length
 838      is needed to build the empty BINFO node on the reader side.  */
 839   FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (expr), i, t)
 840     stream_write_tree (ob, t, ref_p);
 841   stream_write_tree (ob, NULL_TREE, false);
 842
 843   stream_write_tree (ob, BINFO_OFFSET (expr), ref_p);
 844   stream_write_tree (ob, BINFO_VTABLE (expr), ref_p);
 845   stream_write_tree (ob, BINFO_VPTR_FIELD (expr), ref_p);
 846
 847   /* The number of BINFO_BASE_ACCESSES has already been emitted in
 848      EXPR's bitfield section.  */
 849   FOR_EACH_VEC_SAFE_ELT (BINFO_BASE_ACCESSES (expr), i, t)
 850     stream_write_tree (ob, t, ref_p);
 851
 852   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX
 853      and BINFO_VPTR_INDEX; these are used by C++ FE only.  */
 854 }
 855
 856
 857 /* Write all pointer fields in the TS_CONSTRUCTOR structure of EXPR to
 858    output block OB.  If REF_P is true, write a reference to EXPR's
 859    pointer fields.  */
 860
 861 static void
 862 write_ts_constructor_tree_pointers (struct output_block *ob, tree expr,
 863                                     bool ref_p)
 864 {
 865   unsigned i;
 866   tree index, value;
 867
 868   FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (expr), i, index, value)
 869     {
 870       stream_write_tree (ob, index, ref_p);
 871       stream_write_tree (ob, value, ref_p);
 872     }
 873 }
 874
 875
 876 /* Write all pointer fields in the TS_OMP_CLAUSE structure of EXPR
 877    to output block OB.  If REF_P is true, write a reference to EXPR's
 878    pointer fields.  */
 879
 880 static void
 881 write_ts_omp_clause_tree_pointers (struct output_block *ob, tree expr,
 882                                    bool ref_p)
 883 {
 884   int i;
 885   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
 886     stream_write_tree (ob, OMP_CLAUSE_OPERAND (expr, i), ref_p);
 887   if (OMP_CLAUSE_CODE (expr) == OMP_CLAUSE_REDUCTION)
 888     {
 889       /* We don't stream these right now, handle it if streaming
 890          of them is needed.  */
 891       gcc_assert (OMP_CLAUSE_REDUCTION_GIMPLE_INIT (expr) == NULL);
 892       gcc_assert (OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (expr) == NULL);
 893     }
 894   stream_write_tree (ob, OMP_CLAUSE_CHAIN (expr), ref_p);
 895 }
 896
 897
 898 /* Write all pointer fields in EXPR to output block OB.  If REF_P is true,
 899    the leaves of EXPR are emitted as references.  */
 900
 901 void
 902 streamer_write_tree_body (struct output_block *ob, tree expr, bool ref_p)
 903 {
 904   enum tree_code code;
 905
 906   lto_stats.num_tree_bodies_output++;
 907
 908   code = TREE_CODE (expr);
 909
 910   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
 911     write_ts_common_tree_pointers (ob, expr, ref_p);
 912
 913   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 914     write_ts_vector_tree_pointers (ob, expr, ref_p);
 915
 916   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
 917     write_ts_complex_tree_pointers (ob, expr, ref_p);
 918
 919   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 920     write_ts_decl_minimal_tree_pointers (ob, expr, ref_p);
 921
 922   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 923     write_ts_decl_common_tree_pointers (ob, expr, ref_p);
 924
 925   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
 926     write_ts_decl_non_common_tree_pointers (ob, expr, ref_p);
 927
 928   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 929     write_ts_decl_with_vis_tree_pointers (ob, expr, ref_p);
 930
 931   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
 932     write_ts_field_decl_tree_pointers (ob, expr, ref_p);
 933
 934   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 935     write_ts_function_decl_tree_pointers (ob, expr, ref_p);
 936
 937   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 938     write_ts_type_common_tree_pointers (ob, expr, ref_p);
 939
 940   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
 941     write_ts_type_non_common_tree_pointers (ob, expr, ref_p);
 942
 943   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
 944     write_ts_list_tree_pointers (ob, expr, ref_p);
 945
 946   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 947     write_ts_vec_tree_pointers (ob, expr, ref_p);
 948
 949   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 950     write_ts_exp_tree_pointers (ob, expr, ref_p);
 951
 952   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 953     write_ts_block_tree_pointers (ob, expr, ref_p);
 954
 955   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 956     write_ts_binfo_tree_pointers (ob, expr, ref_p);
 957
 958   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 959     write_ts_constructor_tree_pointers (ob, expr, ref_p);
 960
 961   if (code == OMP_CLAUSE)
 962     write_ts_omp_clause_tree_pointers (ob, expr, ref_p);
 963 }
 964
 965
 966 /* Emit header information for tree EXPR to output block OB.  The header
 967    contains everything needed to instantiate an empty skeleton for
 968    EXPR on the reading side.  IX is the index into the streamer cache
 969    where EXPR is stored.  */
 970
 971 void
 972 streamer_write_tree_header (struct output_block *ob, tree expr)
 973 {
 974   enum LTO_tags tag;
 975   enum tree_code code;
 976
 977   /* We should not see any tree nodes not handled by the streamer.  */
 978   code = TREE_CODE (expr);
 979
 980   /* The header of a tree node consists of its tag, the size of
 981      the node, and any other information needed to instantiate
 982      EXPR on the reading side (such as the number of slots in
 983      variable sized nodes).  */
 984   tag = lto_tree_code_to_tag (code);
 985   streamer_write_record_start (ob, tag);
 986
 987   /* The following will cause bootstrap miscomparisons.  Enable with care.  */
 988 #ifdef LTO_STREAMER_DEBUG
 989   /* This is used mainly for debugging purposes.  When the reader
 990      and the writer do not agree on a streamed node, the pointer
 991      value for EXPR can be used to track down the differences in
 992      the debugger.  */
 993   gcc_assert ((HOST_WIDE_INT) (intptr_t) expr == (intptr_t) expr);
 994   streamer_write_hwi (ob, (HOST_WIDE_INT) (intptr_t) expr);
 995 #endif
 996
 997   /* The text in strings and identifiers are completely emitted in
 998      the header.  */
 999   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
1000     streamer_write_string_cst (ob, ob->main_stream, expr);
1001   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
1002     write_identifier (ob, ob->main_stream, expr);
1003   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1004     streamer_write_hwi (ob, VECTOR_CST_NELTS (expr));
1005   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1006     streamer_write_hwi (ob, TREE_VEC_LENGTH (expr));
1007   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1008     streamer_write_uhwi (ob, BINFO_N_BASE_BINFOS (expr));
1009   else if (TREE_CODE (expr) == CALL_EXPR)
1010     streamer_write_uhwi (ob, call_expr_nargs (expr));
1011   else if (TREE_CODE (expr) == OMP_CLAUSE)
1012     streamer_write_uhwi (ob, OMP_CLAUSE_CODE (expr));
1013   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
1014     {
1015       gcc_checking_assert (TREE_INT_CST_NUNITS (expr));
1016       streamer_write_uhwi (ob, TREE_INT_CST_NUNITS (expr));
1017       streamer_write_uhwi (ob, TREE_INT_CST_EXT_NUNITS (expr));
1018     }
1019 }
1020
1021
1022 /* Emit the integer constant CST to output block OB.  If REF_P is true,
1023    CST's type will be emitted as a reference.  */
1024
1025 void
1026 streamer_write_integer_cst (struct output_block *ob, tree cst, bool ref_p)
1027 {
1028   int i;
1029   int len = TREE_INT_CST_NUNITS (cst);
1030   gcc_assert (!TREE_OVERFLOW (cst));
1031   streamer_write_record_start (ob, LTO_integer_cst);
1032   stream_write_tree (ob, TREE_TYPE (cst), ref_p);
1033   /* We're effectively streaming a non-sign-extended wide_int here,
1034      so there's no need to stream TREE_INT_CST_EXT_NUNITS or any
1035      array members beyond LEN.  We'll recreate the tree from the
1036      wide_int and the type.  */
1037   streamer_write_uhwi (ob, len);
1038   for (i = 0; i < len; i++)
1039     streamer_write_hwi (ob, TREE_INT_CST_ELT (cst, i));
1040 }