gcc/tree-streamer-out.c

   1 /* Routines for emitting trees to a file stream.
   2
   3    Copyright (C) 2011-2015 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 "input.h"
  28 #include "alias.h"
  29 #include "symtab.h"
  30 #include "tree.h"
  31 #include "fold-const.h"
  32 #include "stor-layout.h"
  33 #include "predict.h"
  34 #include "hard-reg-set.h"
  35 #include "input.h"
  36 #include "function.h"
  37 #include "basic-block.h"
  38 #include "tree-ssa-alias.h"
  39 #include "internal-fn.h"
  40 #include "gimple-expr.h"
  41 #include "is-a.h"
  42 #include "gimple.h"
  43 #include "plugin-api.h"
  44 #include "ipa-ref.h"
  45 #include "cgraph.h"
  46 #include "tree-streamer.h"
  47 #include "data-streamer.h"
  48 #include "streamer-hooks.h"
  49 #include "gomp-constants.h"
  50
  51
  52 /* Output the STRING constant to the string
  53    table in OB.  Then put the index onto the INDEX_STREAM.  */
  54
  55 void
  56 streamer_write_string_cst (struct output_block *ob,
  57                            struct lto_output_stream *index_stream,
  58                            tree string)
  59 {
  60   streamer_write_string_with_length (ob, index_stream,
  61                                      string ? TREE_STRING_POINTER (string)
  62                                             : NULL,
  63                                      string ? TREE_STRING_LENGTH (string) : 0,
  64                                      true);
  65 }
  66
  67
  68 /* Output the identifier ID to the string
  69    table in OB.  Then put the index onto the INDEX_STREAM.  */
  70
  71 static void
  72 write_identifier (struct output_block *ob,
  73                    struct lto_output_stream *index_stream,
  74                    tree id)
  75 {
  76   streamer_write_string_with_length (ob, index_stream,
  77                                      IDENTIFIER_POINTER (id),
  78                                      IDENTIFIER_LENGTH (id),
  79                                      true);
  80 }
  81
  82
  83 /* Pack all the non-pointer fields of the TS_BASE structure of
  84    expression EXPR into bitpack BP.  */
  85
  86 static inline void
  87 pack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
  88 {
  89   bp_pack_value (bp, TREE_CODE (expr), 16);
  90   if (!TYPE_P (expr))
  91     {
  92       bp_pack_value (bp, TREE_SIDE_EFFECTS (expr), 1);
  93       bp_pack_value (bp, TREE_CONSTANT (expr), 1);
  94       bp_pack_value (bp, TREE_READONLY (expr), 1);
  95
  96       /* TREE_PUBLIC is used on types to indicate that the type
  97          has a TYPE_CACHED_VALUES vector.  This is not streamed out,
  98          so we skip it here.  */
  99       bp_pack_value (bp, TREE_PUBLIC (expr), 1);
 100     }
 101   else
 102     bp_pack_value (bp, 0, 4);
 103   bp_pack_value (bp, TREE_ADDRESSABLE (expr), 1);
 104   bp_pack_value (bp, TREE_THIS_VOLATILE (expr), 1);
 105   if (DECL_P (expr))
 106     bp_pack_value (bp, DECL_UNSIGNED (expr), 1);
 107   else if (TYPE_P (expr))
 108     bp_pack_value (bp, TYPE_UNSIGNED (expr), 1);
 109   else
 110     bp_pack_value (bp, 0, 1);
 111   /* We write debug info two times, do not confuse the second one.
 112      The only relevant TREE_ASM_WRITTEN use is on SSA names.  */
 113   bp_pack_value (bp, (TREE_CODE (expr) != SSA_NAME
 114                       ? 0 : TREE_ASM_WRITTEN (expr)), 1);
 115   if (TYPE_P (expr))
 116     bp_pack_value (bp, TYPE_ARTIFICIAL (expr), 1);
 117   else
 118     bp_pack_value (bp, TREE_NO_WARNING (expr), 1);
 119   bp_pack_value (bp, TREE_NOTHROW (expr), 1);
 120   bp_pack_value (bp, TREE_STATIC (expr), 1);
 121   if (TREE_CODE (expr) != TREE_BINFO)
 122     bp_pack_value (bp, TREE_PRIVATE (expr), 1);
 123   else
 124     bp_pack_value (bp, 0, 1);
 125   bp_pack_value (bp, TREE_PROTECTED (expr), 1);
 126   bp_pack_value (bp, TREE_DEPRECATED (expr), 1);
 127   if (TYPE_P (expr))
 128     {
 129       bp_pack_value (bp, TYPE_SATURATING (expr), 1);
 130       bp_pack_value (bp, TYPE_ADDR_SPACE (expr), 8);
 131     }
 132   else if (TREE_CODE (expr) == SSA_NAME)
 133     {
 134       bp_pack_value (bp, SSA_NAME_IS_DEFAULT_DEF (expr), 1);
 135       bp_pack_value (bp, 0, 8);
 136     }
 137   else
 138     bp_pack_value (bp, 0, 9);
 139 }
 140
 141
 142 /* Pack all the non-pointer fields of the TS_INTEGER_CST structure of
 143    expression EXPR into bitpack BP.  */
 144
 145 static void
 146 pack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
 147 {
 148   int i;
 149   /* Note that the number of elements has already been written out in
 150      streamer_write_tree_header.  */
 151   for (i = 0; i < TREE_INT_CST_EXT_NUNITS (expr); i++)
 152     bp_pack_var_len_int (bp, TREE_INT_CST_ELT (expr, i));
 153 }
 154
 155
 156 /* Pack all the non-pointer fields of the TS_REAL_CST structure of
 157    expression EXPR into bitpack BP.  */
 158
 159 static void
 160 pack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
 161 {
 162   unsigned i;
 163   REAL_VALUE_TYPE r;
 164
 165   r = TREE_REAL_CST (expr);
 166   bp_pack_value (bp, r.cl, 2);
 167   bp_pack_value (bp, r.decimal, 1);
 168   bp_pack_value (bp, r.sign, 1);
 169   bp_pack_value (bp, r.signalling, 1);
 170   bp_pack_value (bp, r.canonical, 1);
 171   bp_pack_value (bp, r.uexp, EXP_BITS);
 172   for (i = 0; i < SIGSZ; i++)
 173     bp_pack_value (bp, r.sig[i], HOST_BITS_PER_LONG);
 174 }
 175
 176
 177 /* Pack all the non-pointer fields of the TS_FIXED_CST structure of
 178    expression EXPR into bitpack BP.  */
 179
 180 static void
 181 pack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 182 {
 183   struct fixed_value fv = TREE_FIXED_CST (expr);
 184   bp_pack_machine_mode (bp, fv.mode);
 185   bp_pack_var_len_int (bp, fv.data.low);
 186   bp_pack_var_len_int (bp, fv.data.high);
 187 }
 188
 189 /* Pack all the non-pointer fields of the TS_DECL_COMMON structure
 190    of expression EXPR into bitpack BP.  */
 191
 192 static void
 193 pack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 194 {
 195   bp_pack_machine_mode (bp, DECL_MODE (expr));
 196   bp_pack_value (bp, DECL_NONLOCAL (expr), 1);
 197   bp_pack_value (bp, DECL_VIRTUAL_P (expr), 1);
 198   bp_pack_value (bp, DECL_IGNORED_P (expr), 1);
 199   bp_pack_value (bp, DECL_ABSTRACT_P (expr), 1);
 200   bp_pack_value (bp, DECL_ARTIFICIAL (expr), 1);
 201   bp_pack_value (bp, DECL_USER_ALIGN (expr), 1);
 202   bp_pack_value (bp, DECL_PRESERVE_P (expr), 1);
 203   bp_pack_value (bp, DECL_EXTERNAL (expr), 1);
 204   bp_pack_value (bp, DECL_GIMPLE_REG_P (expr), 1);
 205   bp_pack_var_len_unsigned (bp, DECL_ALIGN (expr));
 206
 207   if (TREE_CODE (expr) == LABEL_DECL)
 208     {
 209       /* Note that we do not write LABEL_DECL_UID.  The reader will
 210          always assume an initial value of -1 so that the
 211          label_to_block_map is recreated by gimple_set_bb.  */
 212       bp_pack_var_len_unsigned (bp, EH_LANDING_PAD_NR (expr));
 213     }
 214
 215   if (TREE_CODE (expr) == FIELD_DECL)
 216     {
 217       bp_pack_value (bp, DECL_PACKED (expr), 1);
 218       bp_pack_value (bp, DECL_NONADDRESSABLE_P (expr), 1);
 219       bp_pack_value (bp, expr->decl_common.off_align, 8);
 220     }
 221
 222   if (TREE_CODE (expr) == VAR_DECL)
 223     {
 224       bp_pack_value (bp, DECL_HAS_DEBUG_EXPR_P (expr), 1);
 225       bp_pack_value (bp, DECL_NONLOCAL_FRAME (expr), 1);
 226     }
 227
 228   if (TREE_CODE (expr) == RESULT_DECL
 229       || TREE_CODE (expr) == PARM_DECL
 230       || TREE_CODE (expr) == VAR_DECL)
 231     {
 232       bp_pack_value (bp, DECL_BY_REFERENCE (expr), 1);
 233       if (TREE_CODE (expr) == VAR_DECL
 234           || TREE_CODE (expr) == PARM_DECL)
 235         bp_pack_value (bp, DECL_HAS_VALUE_EXPR_P (expr), 1);
 236     }
 237 }
 238
 239
 240 /* Pack all the non-pointer fields of the TS_DECL_WRTL structure
 241    of expression EXPR into bitpack BP.  */
 242
 243 static void
 244 pack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 245 {
 246   bp_pack_value (bp, DECL_REGISTER (expr), 1);
 247 }
 248
 249
 250 /* Pack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 251    of expression EXPR into bitpack BP.  */
 252
 253 static void
 254 pack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 255 {
 256   bp_pack_value (bp, DECL_COMMON (expr), 1);
 257   bp_pack_value (bp, DECL_DLLIMPORT_P (expr), 1);
 258   bp_pack_value (bp, DECL_WEAK (expr), 1);
 259   bp_pack_value (bp, DECL_SEEN_IN_BIND_EXPR_P (expr),  1);
 260   bp_pack_value (bp, DECL_COMDAT (expr),  1);
 261   bp_pack_value (bp, DECL_VISIBILITY (expr),  2);
 262   bp_pack_value (bp, DECL_VISIBILITY_SPECIFIED (expr),  1);
 263
 264   if (TREE_CODE (expr) == VAR_DECL)
 265     {
 266       bp_pack_value (bp, DECL_HARD_REGISTER (expr), 1);
 267       /* DECL_IN_TEXT_SECTION is set during final asm output only. */
 268       bp_pack_value (bp, DECL_IN_CONSTANT_POOL (expr), 1);
 269     }
 270
 271   if (TREE_CODE (expr) == FUNCTION_DECL)
 272     {
 273       bp_pack_value (bp, DECL_FINAL_P (expr), 1);
 274       bp_pack_value (bp, DECL_CXX_CONSTRUCTOR_P (expr), 1);
 275       bp_pack_value (bp, DECL_CXX_DESTRUCTOR_P (expr), 1);
 276     }
 277 }
 278
 279
 280 /* Pack all the non-pointer fields of the TS_FUNCTION_DECL structure
 281    of expression EXPR into bitpack BP.  */
 282
 283 static void
 284 pack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 285 {
 286   /* For normal/md builtins we only write the class and code, so they
 287      should never be handled here.  */
 288   gcc_assert (!streamer_handle_as_builtin_p (expr));
 289
 290   bp_pack_enum (bp, built_in_class, BUILT_IN_LAST,
 291                 DECL_BUILT_IN_CLASS (expr));
 292   bp_pack_value (bp, DECL_STATIC_CONSTRUCTOR (expr), 1);
 293   bp_pack_value (bp, DECL_STATIC_DESTRUCTOR (expr), 1);
 294   bp_pack_value (bp, DECL_UNINLINABLE (expr), 1);
 295   bp_pack_value (bp, DECL_POSSIBLY_INLINED (expr), 1);
 296   bp_pack_value (bp, DECL_IS_NOVOPS (expr), 1);
 297   bp_pack_value (bp, DECL_IS_RETURNS_TWICE (expr), 1);
 298   bp_pack_value (bp, DECL_IS_MALLOC (expr), 1);
 299   bp_pack_value (bp, DECL_IS_OPERATOR_NEW (expr), 1);
 300   bp_pack_value (bp, DECL_DECLARED_INLINE_P (expr), 1);
 301   bp_pack_value (bp, DECL_STATIC_CHAIN (expr), 1);
 302   bp_pack_value (bp, DECL_NO_INLINE_WARNING_P (expr), 1);
 303   bp_pack_value (bp, DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr), 1);
 304   bp_pack_value (bp, DECL_NO_LIMIT_STACK (expr), 1);
 305   bp_pack_value (bp, DECL_DISREGARD_INLINE_LIMITS (expr), 1);
 306   bp_pack_value (bp, DECL_PURE_P (expr), 1);
 307   bp_pack_value (bp, DECL_LOOPING_CONST_OR_PURE_P (expr), 1);
 308   if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
 309     bp_pack_value (bp, DECL_FUNCTION_CODE (expr), 12);
 310 }
 311
 312
 313 /* Pack all the non-pointer fields of the TS_TYPE_COMMON structure
 314    of expression EXPR into bitpack BP.  */
 315
 316 static void
 317 pack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 318 {
 319   bp_pack_machine_mode (bp, TYPE_MODE (expr));
 320   bp_pack_value (bp, TYPE_STRING_FLAG (expr), 1);
 321   bp_pack_value (bp, TYPE_NO_FORCE_BLK (expr), 1);
 322   bp_pack_value (bp, TYPE_NEEDS_CONSTRUCTING (expr), 1);
 323   if (RECORD_OR_UNION_TYPE_P (expr))
 324     {
 325       bp_pack_value (bp, TYPE_TRANSPARENT_AGGR (expr), 1);
 326       bp_pack_value (bp, TYPE_FINAL_P (expr), 1);
 327     }
 328   else if (TREE_CODE (expr) == ARRAY_TYPE)
 329     bp_pack_value (bp, TYPE_NONALIASED_COMPONENT (expr), 1);
 330   bp_pack_value (bp, TYPE_PACKED (expr), 1);
 331   bp_pack_value (bp, TYPE_RESTRICT (expr), 1);
 332   bp_pack_value (bp, TYPE_USER_ALIGN (expr), 1);
 333   bp_pack_value (bp, TYPE_READONLY (expr), 1);
 334   bp_pack_var_len_unsigned (bp, TYPE_PRECISION (expr));
 335   bp_pack_var_len_unsigned (bp, TYPE_ALIGN (expr));
 336   /* Make sure to preserve the fact whether the frontend would assign
 337      alias-set zero to this type.  */
 338   bp_pack_var_len_int (bp, (TYPE_ALIAS_SET (expr) == 0
 339                             || (!in_lto_p
 340                                 && get_alias_set (expr) == 0)) ? 0 : -1);
 341 }
 342
 343
 344 /* Pack all the non-pointer fields of the TS_BLOCK structure
 345    of expression EXPR into bitpack BP.  */
 346
 347 static void
 348 pack_ts_block_value_fields (struct output_block *ob,
 349                             struct bitpack_d *bp, tree expr)
 350 {
 351   bp_pack_value (bp, BLOCK_ABSTRACT (expr), 1);
 352   /* BLOCK_NUMBER is recomputed.  */
 353   /* Stream BLOCK_SOURCE_LOCATION for the limited cases we can handle - those
 354      that represent inlined function scopes.
 355      For the rest them on the floor instead of ICEing in dwarf2out.c.  */
 356   if (inlined_function_outer_scope_p (expr))
 357     stream_output_location (ob, bp, BLOCK_SOURCE_LOCATION (expr));
 358   else
 359     stream_output_location (ob, bp, UNKNOWN_LOCATION);
 360 }
 361
 362 /* Pack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL structure
 363    of expression EXPR into bitpack BP.  */
 364
 365 static void
 366 pack_ts_translation_unit_decl_value_fields (struct output_block *ob,
 367                                             struct bitpack_d *bp, tree expr)
 368 {
 369   bp_pack_string (ob, bp, TRANSLATION_UNIT_LANGUAGE (expr), true);
 370 }
 371
 372
 373 /* Pack all the non-pointer fields of the TS_OMP_CLAUSE structure
 374    of expression EXPR into bitpack BP.  */
 375
 376 static void
 377 pack_ts_omp_clause_value_fields (struct output_block *ob,
 378                                  struct bitpack_d *bp, tree expr)
 379 {
 380   stream_output_location (ob, bp, OMP_CLAUSE_LOCATION (expr));
 381   switch (OMP_CLAUSE_CODE (expr))
 382     {
 383     case OMP_CLAUSE_DEFAULT:
 384       bp_pack_enum (bp, omp_clause_default_kind, OMP_CLAUSE_DEFAULT_LAST,
 385                     OMP_CLAUSE_DEFAULT_KIND (expr));
 386       break;
 387     case OMP_CLAUSE_SCHEDULE:
 388       bp_pack_enum (bp, omp_clause_schedule_kind, OMP_CLAUSE_SCHEDULE_LAST,
 389                     OMP_CLAUSE_SCHEDULE_KIND (expr));
 390       break;
 391     case OMP_CLAUSE_DEPEND:
 392       bp_pack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST,
 393                     OMP_CLAUSE_DEPEND_KIND (expr));
 394       break;
 395     case OMP_CLAUSE_MAP:
 396       bp_pack_enum (bp, gomp_map_kind, GOMP_MAP_LAST,
 397                     OMP_CLAUSE_MAP_KIND (expr));
 398       break;
 399     case OMP_CLAUSE_PROC_BIND:
 400       bp_pack_enum (bp, omp_clause_proc_bind_kind, OMP_CLAUSE_PROC_BIND_LAST,
 401                     OMP_CLAUSE_PROC_BIND_KIND (expr));
 402       break;
 403     case OMP_CLAUSE_REDUCTION:
 404       bp_pack_enum (bp, tree_code, MAX_TREE_CODES,
 405                     OMP_CLAUSE_REDUCTION_CODE (expr));
 406       break;
 407     default:
 408       break;
 409     }
 410 }
 411
 412
 413 /* Pack all the bitfields in EXPR into a bit pack.  */
 414
 415 void
 416 streamer_write_tree_bitfields (struct output_block *ob, tree expr)
 417 {
 418   bitpack_d bp = bitpack_create (ob->main_stream);
 419   enum tree_code code;
 420
 421   code = TREE_CODE (expr);
 422
 423   /* Note that all these functions are highly sensitive to changes in
 424      the types and sizes of each of the fields being packed.  */
 425   pack_ts_base_value_fields (&bp, expr);
 426
 427   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 428     pack_ts_int_cst_value_fields (&bp, expr);
 429
 430   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 431     pack_ts_real_cst_value_fields (&bp, expr);
 432
 433   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 434     pack_ts_fixed_cst_value_fields (&bp, expr);
 435
 436   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 437     stream_output_location (ob, &bp, DECL_SOURCE_LOCATION (expr));
 438
 439   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 440     pack_ts_decl_common_value_fields (&bp, expr);
 441
 442   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 443     pack_ts_decl_wrtl_value_fields (&bp, expr);
 444
 445   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 446     pack_ts_decl_with_vis_value_fields (&bp, expr);
 447
 448   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 449     pack_ts_function_decl_value_fields (&bp, expr);
 450
 451   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 452     pack_ts_type_common_value_fields (&bp, expr);
 453
 454   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 455     {
 456       stream_output_location (ob, &bp, EXPR_LOCATION (expr));
 457       if (code == MEM_REF
 458           || code == TARGET_MEM_REF)
 459         {
 460           bp_pack_value (&bp, MR_DEPENDENCE_CLIQUE (expr), sizeof (short) * 8);
 461           if (MR_DEPENDENCE_CLIQUE (expr) != 0)
 462             bp_pack_value (&bp, MR_DEPENDENCE_BASE (expr), sizeof (short) * 8);
 463         }
 464     }
 465
 466   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 467     pack_ts_block_value_fields (ob, &bp, expr);
 468
 469   if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
 470     pack_ts_translation_unit_decl_value_fields (ob, &bp, expr);
 471
 472   if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
 473     cl_optimization_stream_out (&bp, TREE_OPTIMIZATION (expr));
 474
 475   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 476     bp_pack_var_len_unsigned (&bp, vec_safe_length (BINFO_BASE_ACCESSES (expr)));
 477
 478   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 479     bp_pack_var_len_unsigned (&bp, CONSTRUCTOR_NELTS (expr));
 480
 481   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION)
 482       /* Don't stream these when passing things to a different target.  */
 483       && !lto_stream_offload_p)
 484     cl_target_option_stream_out (ob, &bp, TREE_TARGET_OPTION (expr));
 485
 486   if (code == OMP_CLAUSE)
 487     pack_ts_omp_clause_value_fields (ob, &bp, expr);
 488
 489   streamer_write_bitpack (&bp);
 490 }
 491
 492
 493 /* Write the code and class of builtin EXPR to output block OB.  IX is
 494    the index into the streamer cache where EXPR is stored.*/
 495
 496 void
 497 streamer_write_builtin (struct output_block *ob, tree expr)
 498 {
 499   gcc_assert (streamer_handle_as_builtin_p (expr));
 500
 501   if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD
 502       && !targetm.builtin_decl)
 503     sorry ("tree bytecode streams do not support machine specific builtin "
 504            "functions on this target");
 505
 506   streamer_write_record_start (ob, LTO_builtin_decl);
 507   streamer_write_enum (ob->main_stream, built_in_class, BUILT_IN_LAST,
 508                        DECL_BUILT_IN_CLASS (expr));
 509   streamer_write_uhwi (ob, DECL_FUNCTION_CODE (expr));
 510
 511   if (DECL_ASSEMBLER_NAME_SET_P (expr))
 512     {
 513       /* When the assembler name of a builtin gets a user name,
 514          the new name is always prefixed with '*' by
 515          set_builtin_user_assembler_name.  So, to prevent the
 516          reader side from adding a second '*', we omit it here.  */
 517       const char *str = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (expr));
 518       if (strlen (str) > 1 && str[0] == '*')
 519         streamer_write_string (ob, ob->main_stream, &str[1], true);
 520       else
 521         streamer_write_string (ob, ob->main_stream, NULL, true);
 522     }
 523   else
 524     streamer_write_string (ob, ob->main_stream, NULL, true);
 525 }
 526
 527
 528 /* Emit the chain of tree nodes starting at T.  OB is the output block
 529    to write to.  REF_P is true if chain elements should be emitted
 530    as references.  */
 531
 532 void
 533 streamer_write_chain (struct output_block *ob, tree t, bool ref_p)
 534 {
 535   while (t)
 536     {
 537       /* We avoid outputting external vars or functions by reference
 538          to the global decls section as we do not want to have them
 539          enter decl merging.  This is, of course, only for the call
 540          for streaming BLOCK_VARS, but other callers are safe.
 541          See also lto-streamer-out.c:DFS_write_tree_body.  */
 542       if (VAR_OR_FUNCTION_DECL_P (t)
 543           && DECL_EXTERNAL (t))
 544         stream_write_tree_shallow_non_ref (ob, t, ref_p);
 545       else
 546         stream_write_tree (ob, t, ref_p);
 547
 548       t = TREE_CHAIN (t);
 549     }
 550
 551   /* Write a sentinel to terminate the chain.  */
 552   stream_write_tree (ob, NULL_TREE, ref_p);
 553 }
 554
 555
 556 /* Write all pointer fields in the TS_COMMON structure of EXPR to output
 557    block OB.  If REF_P is true, write a reference to EXPR's pointer
 558    fields.  */
 559
 560 static void
 561 write_ts_common_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 562 {
 563   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 564     stream_write_tree (ob, TREE_TYPE (expr), ref_p);
 565 }
 566
 567
 568 /* Write all pointer fields in the TS_VECTOR structure of EXPR to output
 569    block OB.  If REF_P is true, write a reference to EXPR's pointer
 570    fields.  */
 571
 572 static void
 573 write_ts_vector_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 574 {
 575   unsigned i;
 576   /* Note that the number of elements for EXPR has already been emitted
 577      in EXPR's header (see streamer_write_tree_header).  */
 578   for (i = 0; i < VECTOR_CST_NELTS (expr); ++i)
 579     stream_write_tree (ob, VECTOR_CST_ELT (expr, i), ref_p);
 580 }
 581
 582
 583 /* Write all pointer fields in the TS_COMPLEX structure of EXPR to output
 584    block OB.  If REF_P is true, write a reference to EXPR's pointer
 585    fields.  */
 586
 587 static void
 588 write_ts_complex_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 589 {
 590   stream_write_tree (ob, TREE_REALPART (expr), ref_p);
 591   stream_write_tree (ob, TREE_IMAGPART (expr), ref_p);
 592 }
 593
 594
 595 /* Write all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 596    to output block OB.  If REF_P is true, write a reference to EXPR's
 597    pointer fields.  */
 598
 599 static void
 600 write_ts_decl_minimal_tree_pointers (struct output_block *ob, tree expr,
 601                                      bool ref_p)
 602 {
 603   /* Drop names that were created for anonymous entities.  */
 604   if (DECL_NAME (expr)
 605       && TREE_CODE (DECL_NAME (expr)) == IDENTIFIER_NODE
 606       && ANON_AGGRNAME_P (DECL_NAME (expr)))
 607     stream_write_tree (ob, NULL_TREE, ref_p);
 608   else
 609     stream_write_tree (ob, DECL_NAME (expr), ref_p);
 610   stream_write_tree (ob, DECL_CONTEXT (expr), ref_p);
 611 }
 612
 613
 614 /* Write all pointer fields in the TS_DECL_COMMON structure of EXPR to
 615    output block OB.  If REF_P is true, write a reference to EXPR's
 616    pointer fields.  */
 617
 618 static void
 619 write_ts_decl_common_tree_pointers (struct output_block *ob, tree expr,
 620                                     bool ref_p)
 621 {
 622   stream_write_tree (ob, DECL_SIZE (expr), ref_p);
 623   stream_write_tree (ob, DECL_SIZE_UNIT (expr), ref_p);
 624
 625   /* Note, DECL_INITIAL is not handled here.  Since DECL_INITIAL needs
 626      special handling in LTO, it must be handled by streamer hooks.  */
 627
 628   stream_write_tree (ob, DECL_ATTRIBUTES (expr), ref_p);
 629
 630   /* Do not stream DECL_ABSTRACT_ORIGIN.  We cannot handle debug information
 631      for early inlining so drop it on the floor instead of ICEing in
 632      dwarf2out.c.  */
 633
 634   if ((TREE_CODE (expr) == VAR_DECL
 635        || TREE_CODE (expr) == PARM_DECL)
 636       && DECL_HAS_VALUE_EXPR_P (expr))
 637     stream_write_tree (ob, DECL_VALUE_EXPR (expr), ref_p);
 638
 639   if (TREE_CODE (expr) == VAR_DECL)
 640     stream_write_tree (ob, DECL_DEBUG_EXPR (expr), ref_p);
 641 }
 642
 643
 644 /* Write all pointer fields in the TS_DECL_NON_COMMON structure of
 645    EXPR to output block OB.  If REF_P is true, write a reference to EXPR's
 646    pointer fields.  */
 647
 648 static void
 649 write_ts_decl_non_common_tree_pointers (struct output_block *ob, tree expr,
 650                                         bool ref_p)
 651 {
 652   if (TREE_CODE (expr) == TYPE_DECL)
 653     stream_write_tree (ob, DECL_ORIGINAL_TYPE (expr), ref_p);
 654 }
 655
 656
 657 /* Write all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 658    to output block OB.  If REF_P is true, write a reference to EXPR's
 659    pointer fields.  */
 660
 661 static void
 662 write_ts_decl_with_vis_tree_pointers (struct output_block *ob, tree expr,
 663                                       bool ref_p)
 664 {
 665   /* Make sure we don't inadvertently set the assembler name.  */
 666   if (DECL_ASSEMBLER_NAME_SET_P (expr))
 667     stream_write_tree (ob, DECL_ASSEMBLER_NAME (expr), ref_p);
 668   else
 669     stream_write_tree (ob, NULL_TREE, false);
 670 }
 671
 672
 673 /* Write all pointer fields in the TS_FIELD_DECL structure of EXPR to
 674    output block OB.  If REF_P is true, write a reference to EXPR's
 675    pointer fields.  */
 676
 677 static void
 678 write_ts_field_decl_tree_pointers (struct output_block *ob, tree expr,
 679                                    bool ref_p)
 680 {
 681   stream_write_tree (ob, DECL_FIELD_OFFSET (expr), ref_p);
 682   stream_write_tree (ob, DECL_BIT_FIELD_TYPE (expr), ref_p);
 683   stream_write_tree (ob, DECL_BIT_FIELD_REPRESENTATIVE (expr), ref_p);
 684   stream_write_tree (ob, DECL_FIELD_BIT_OFFSET (expr), ref_p);
 685   stream_write_tree (ob, DECL_FCONTEXT (expr), ref_p);
 686 }
 687
 688
 689 /* Write all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 690    to output block OB.  If REF_P is true, write a reference to EXPR's
 691    pointer fields.  */
 692
 693 static void
 694 write_ts_function_decl_tree_pointers (struct output_block *ob, tree expr,
 695                                       bool ref_p)
 696 {
 697   stream_write_tree (ob, DECL_VINDEX (expr), ref_p);
 698   /* DECL_STRUCT_FUNCTION is handled by lto_output_function.  */
 699   stream_write_tree (ob, DECL_FUNCTION_PERSONALITY (expr), ref_p);
 700   /* Don't stream these when passing things to a different target.  */
 701   if (!lto_stream_offload_p)
 702     stream_write_tree (ob, DECL_FUNCTION_SPECIFIC_TARGET (expr), ref_p);
 703   stream_write_tree (ob, DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr), ref_p);
 704 }
 705
 706
 707 /* Write all pointer fields in the TS_TYPE_COMMON structure of EXPR to
 708    output block OB.  If REF_P is true, write a reference to EXPR's
 709    pointer fields.  */
 710
 711 static void
 712 write_ts_type_common_tree_pointers (struct output_block *ob, tree expr,
 713                                     bool ref_p)
 714 {
 715   stream_write_tree (ob, TYPE_SIZE (expr), ref_p);
 716   stream_write_tree (ob, TYPE_SIZE_UNIT (expr), ref_p);
 717   stream_write_tree (ob, TYPE_ATTRIBUTES (expr), ref_p);
 718   stream_write_tree (ob, TYPE_NAME (expr), ref_p);
 719   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 720      reconstructed during fixup.  */
 721   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 722      during fixup.  */
 723   stream_write_tree (ob, TYPE_MAIN_VARIANT (expr), ref_p);
 724   stream_write_tree (ob, TYPE_CONTEXT (expr), ref_p);
 725   /* TYPE_CANONICAL is re-computed during type merging, so no need
 726      to stream it here.  */
 727   stream_write_tree (ob, TYPE_STUB_DECL (expr), ref_p);
 728 }
 729
 730 /* Write all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 731    to output block OB.  If REF_P is true, write a reference to EXPR's
 732    pointer fields.  */
 733
 734 static void
 735 write_ts_type_non_common_tree_pointers (struct output_block *ob, tree expr,
 736                                         bool ref_p)
 737 {
 738   if (TREE_CODE (expr) == ENUMERAL_TYPE)
 739     stream_write_tree (ob, TYPE_VALUES (expr), ref_p);
 740   else if (TREE_CODE (expr) == ARRAY_TYPE)
 741     stream_write_tree (ob, TYPE_DOMAIN (expr), ref_p);
 742   else if (RECORD_OR_UNION_TYPE_P (expr))
 743     streamer_write_chain (ob, TYPE_FIELDS (expr), ref_p);
 744   else if (TREE_CODE (expr) == FUNCTION_TYPE
 745            || TREE_CODE (expr) == METHOD_TYPE)
 746     stream_write_tree (ob, TYPE_ARG_TYPES (expr), ref_p);
 747
 748   if (!POINTER_TYPE_P (expr))
 749     stream_write_tree (ob, TYPE_MINVAL (expr), ref_p);
 750   stream_write_tree (ob, TYPE_MAXVAL (expr), ref_p);
 751   if (RECORD_OR_UNION_TYPE_P (expr))
 752     stream_write_tree (ob, TYPE_BINFO (expr), ref_p);
 753 }
 754
 755
 756 /* Write all pointer fields in the TS_LIST structure of EXPR to output
 757    block OB.  If REF_P is true, write a reference to EXPR's pointer
 758    fields.  */
 759
 760 static void
 761 write_ts_list_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 762 {
 763   stream_write_tree (ob, TREE_PURPOSE (expr), ref_p);
 764   stream_write_tree (ob, TREE_VALUE (expr), ref_p);
 765   stream_write_tree (ob, TREE_CHAIN (expr), ref_p);
 766 }
 767
 768
 769 /* Write all pointer fields in the TS_VEC structure of EXPR to output
 770    block OB.  If REF_P is true, write a reference to EXPR's pointer
 771    fields.  */
 772
 773 static void
 774 write_ts_vec_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 775 {
 776   int i;
 777
 778   /* Note that the number of slots for EXPR has already been emitted
 779      in EXPR's header (see streamer_write_tree_header).  */
 780   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 781     stream_write_tree (ob, TREE_VEC_ELT (expr, i), ref_p);
 782 }
 783
 784
 785 /* Write all pointer fields in the TS_EXP structure of EXPR to output
 786    block OB.  If REF_P is true, write a reference to EXPR's pointer
 787    fields.  */
 788
 789 static void
 790 write_ts_exp_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 791 {
 792   int i;
 793
 794   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 795     stream_write_tree (ob, TREE_OPERAND (expr, i), ref_p);
 796   stream_write_tree (ob, TREE_BLOCK (expr), ref_p);
 797 }
 798
 799
 800 /* Write all pointer fields in the TS_BLOCK structure of EXPR to output
 801    block OB.  If REF_P is true, write a reference to EXPR's pointer
 802    fields.  */
 803
 804 static void
 805 write_ts_block_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 806 {
 807   streamer_write_chain (ob, BLOCK_VARS (expr), ref_p);
 808
 809   stream_write_tree (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
 810
 811   /* Stream BLOCK_ABSTRACT_ORIGIN for the limited cases we can handle - those
 812      that represent inlined function scopes.
 813      For the rest them on the floor instead of ICEing in dwarf2out.c.  */
 814   if (inlined_function_outer_scope_p (expr))
 815     {
 816       tree ultimate_origin = block_ultimate_origin (expr);
 817       stream_write_tree (ob, ultimate_origin, ref_p);
 818     }
 819   else
 820     stream_write_tree (ob, NULL_TREE, ref_p);
 821   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 822      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 823      dwarf2out.c.  */
 824
 825   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 826      streaming time.  */
 827
 828   /* Do not output BLOCK_SUBBLOCKS.  Instead on streaming-in this
 829      list is re-constructed from BLOCK_SUPERCONTEXT.  */
 830 }
 831
 832
 833 /* Write all pointer fields in the TS_BINFO structure of EXPR to output
 834    block OB.  If REF_P is true, write a reference to EXPR's pointer
 835    fields.  */
 836
 837 static void
 838 write_ts_binfo_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 839 {
 840   unsigned i;
 841   tree t;
 842
 843   /* Note that the number of BINFO slots has already been emitted in
 844      EXPR's header (see streamer_write_tree_header) because this length
 845      is needed to build the empty BINFO node on the reader side.  */
 846   FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (expr), i, t)
 847     stream_write_tree (ob, t, ref_p);
 848   stream_write_tree (ob, NULL_TREE, false);
 849
 850   stream_write_tree (ob, BINFO_OFFSET (expr), ref_p);
 851   stream_write_tree (ob, BINFO_VTABLE (expr), ref_p);
 852   stream_write_tree (ob, BINFO_VPTR_FIELD (expr), ref_p);
 853
 854   /* The number of BINFO_BASE_ACCESSES has already been emitted in
 855      EXPR's bitfield section.  */
 856   FOR_EACH_VEC_SAFE_ELT (BINFO_BASE_ACCESSES (expr), i, t)
 857     stream_write_tree (ob, t, ref_p);
 858
 859   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX
 860      and BINFO_VPTR_INDEX; these are used by C++ FE only.  */
 861 }
 862
 863
 864 /* Write all pointer fields in the TS_CONSTRUCTOR structure of EXPR to
 865    output block OB.  If REF_P is true, write a reference to EXPR's
 866    pointer fields.  */
 867
 868 static void
 869 write_ts_constructor_tree_pointers (struct output_block *ob, tree expr,
 870                                     bool ref_p)
 871 {
 872   unsigned i;
 873   tree index, value;
 874
 875   FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (expr), i, index, value)
 876     {
 877       stream_write_tree (ob, index, ref_p);
 878       stream_write_tree (ob, value, ref_p);
 879     }
 880 }
 881
 882
 883 /* Write all pointer fields in the TS_OMP_CLAUSE structure of EXPR
 884    to output block OB.  If REF_P is true, write a reference to EXPR's
 885    pointer fields.  */
 886
 887 static void
 888 write_ts_omp_clause_tree_pointers (struct output_block *ob, tree expr,
 889                                    bool ref_p)
 890 {
 891   int i;
 892   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
 893     stream_write_tree (ob, OMP_CLAUSE_OPERAND (expr, i), ref_p);
 894   if (OMP_CLAUSE_CODE (expr) == OMP_CLAUSE_REDUCTION)
 895     {
 896       /* We don't stream these right now, handle it if streaming
 897          of them is needed.  */
 898       gcc_assert (OMP_CLAUSE_REDUCTION_GIMPLE_INIT (expr) == NULL);
 899       gcc_assert (OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (expr) == NULL);
 900     }
 901   stream_write_tree (ob, OMP_CLAUSE_CHAIN (expr), ref_p);
 902 }
 903
 904
 905 /* Write all pointer fields in EXPR to output block OB.  If REF_P is true,
 906    the leaves of EXPR are emitted as references.  */
 907
 908 void
 909 streamer_write_tree_body (struct output_block *ob, tree expr, bool ref_p)
 910 {
 911   enum tree_code code;
 912
 913   lto_stats.num_tree_bodies_output++;
 914
 915   code = TREE_CODE (expr);
 916
 917   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
 918     write_ts_common_tree_pointers (ob, expr, ref_p);
 919
 920   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 921     write_ts_vector_tree_pointers (ob, expr, ref_p);
 922
 923   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
 924     write_ts_complex_tree_pointers (ob, expr, ref_p);
 925
 926   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 927     write_ts_decl_minimal_tree_pointers (ob, expr, ref_p);
 928
 929   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 930     write_ts_decl_common_tree_pointers (ob, expr, ref_p);
 931
 932   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
 933     write_ts_decl_non_common_tree_pointers (ob, expr, ref_p);
 934
 935   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 936     write_ts_decl_with_vis_tree_pointers (ob, expr, ref_p);
 937
 938   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
 939     write_ts_field_decl_tree_pointers (ob, expr, ref_p);
 940
 941   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 942     write_ts_function_decl_tree_pointers (ob, expr, ref_p);
 943
 944   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 945     write_ts_type_common_tree_pointers (ob, expr, ref_p);
 946
 947   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
 948     write_ts_type_non_common_tree_pointers (ob, expr, ref_p);
 949
 950   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
 951     write_ts_list_tree_pointers (ob, expr, ref_p);
 952
 953   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 954     write_ts_vec_tree_pointers (ob, expr, ref_p);
 955
 956   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 957     write_ts_exp_tree_pointers (ob, expr, ref_p);
 958
 959   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 960     write_ts_block_tree_pointers (ob, expr, ref_p);
 961
 962   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 963     write_ts_binfo_tree_pointers (ob, expr, ref_p);
 964
 965   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 966     write_ts_constructor_tree_pointers (ob, expr, ref_p);
 967
 968   if (code == OMP_CLAUSE)
 969     write_ts_omp_clause_tree_pointers (ob, expr, ref_p);
 970 }
 971
 972
 973 /* Emit header information for tree EXPR to output block OB.  The header
 974    contains everything needed to instantiate an empty skeleton for
 975    EXPR on the reading side.  IX is the index into the streamer cache
 976    where EXPR is stored.  */
 977
 978 void
 979 streamer_write_tree_header (struct output_block *ob, tree expr)
 980 {
 981   enum LTO_tags tag;
 982   enum tree_code code;
 983
 984   /* We should not see any tree nodes not handled by the streamer.  */
 985   code = TREE_CODE (expr);
 986
 987   /* The header of a tree node consists of its tag, the size of
 988      the node, and any other information needed to instantiate
 989      EXPR on the reading side (such as the number of slots in
 990      variable sized nodes).  */
 991   tag = lto_tree_code_to_tag (code);
 992   streamer_write_record_start (ob, tag);
 993
 994   /* The following will cause bootstrap miscomparisons.  Enable with care.  */
 995 #ifdef LTO_STREAMER_DEBUG
 996   /* This is used mainly for debugging purposes.  When the reader
 997      and the writer do not agree on a streamed node, the pointer
 998      value for EXPR can be used to track down the differences in
 999      the debugger.  */
1000   gcc_assert ((HOST_WIDE_INT) (intptr_t) expr == (intptr_t) expr);
1001   streamer_write_hwi (ob, (HOST_WIDE_INT) (intptr_t) expr);
1002 #endif
1003
1004   /* The text in strings and identifiers are completely emitted in
1005      the header.  */
1006   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
1007     streamer_write_string_cst (ob, ob->main_stream, expr);
1008   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
1009     write_identifier (ob, ob->main_stream, expr);
1010   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
1011     streamer_write_hwi (ob, VECTOR_CST_NELTS (expr));
1012   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1013     streamer_write_hwi (ob, TREE_VEC_LENGTH (expr));
1014   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1015     streamer_write_uhwi (ob, BINFO_N_BASE_BINFOS (expr));
1016   else if (TREE_CODE (expr) == CALL_EXPR)
1017     streamer_write_uhwi (ob, call_expr_nargs (expr));
1018   else if (TREE_CODE (expr) == OMP_CLAUSE)
1019     streamer_write_uhwi (ob, OMP_CLAUSE_CODE (expr));
1020   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
1021     {
1022       gcc_checking_assert (TREE_INT_CST_NUNITS (expr));
1023       streamer_write_uhwi (ob, TREE_INT_CST_NUNITS (expr));
1024       streamer_write_uhwi (ob, TREE_INT_CST_EXT_NUNITS (expr));
1025     }
1026 }
1027
1028
1029 /* Emit the integer constant CST to output block OB.  If REF_P is true,
1030    CST's type will be emitted as a reference.  */
1031
1032 void
1033 streamer_write_integer_cst (struct output_block *ob, tree cst, bool ref_p)
1034 {
1035   int i;
1036   int len = TREE_INT_CST_NUNITS (cst);
1037   gcc_assert (!TREE_OVERFLOW (cst));
1038   streamer_write_record_start (ob, LTO_integer_cst);
1039   stream_write_tree (ob, TREE_TYPE (cst), ref_p);
1040   /* We're effectively streaming a non-sign-extended wide_int here,
1041      so there's no need to stream TREE_INT_CST_EXT_NUNITS or any
1042      array members beyond LEN.  We'll recreate the tree from the
1043      wide_int and the type.  */
1044   streamer_write_uhwi (ob, len);
1045   for (i = 0; i < len; i++)
1046     streamer_write_hwi (ob, TREE_INT_CST_ELT (cst, i));
1047 }