gcc/tree-streamer-out.c

   1 /* Routines for emitting trees to a file stream.
   2
   3    Copyright (C) 2011-2018 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 "tree-streamer.h"
  30 #include "cgraph.h"
  31 #include "alias.h"
  32 #include "stor-layout.h"
  33 #include "gomp-constants.h"
  34
  35
  36 /* Output the STRING constant to the string
  37    table in OB.  Then put the index onto the INDEX_STREAM.  */
  38
  39 void
  40 streamer_write_string_cst (struct output_block *ob,
  41                            struct lto_output_stream *index_stream,
  42                            tree string)
  43 {
  44   streamer_write_string_with_length (ob, index_stream,
  45                                      string ? TREE_STRING_POINTER (string)
  46                                             : NULL,
  47                                      string ? TREE_STRING_LENGTH (string) : 0,
  48                                      true);
  49 }
  50
  51
  52 /* Output the identifier ID to the string
  53    table in OB.  Then put the index onto the INDEX_STREAM.  */
  54
  55 static void
  56 write_identifier (struct output_block *ob,
  57                    struct lto_output_stream *index_stream,
  58                    tree id)
  59 {
  60   streamer_write_string_with_length (ob, index_stream,
  61                                      IDENTIFIER_POINTER (id),
  62                                      IDENTIFIER_LENGTH (id),
  63                                      true);
  64 }
  65
  66
  67 /* Pack all the non-pointer fields of the TS_BASE structure of
  68    expression EXPR into bitpack BP.  */
  69
  70 static inline void
  71 pack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
  72 {
  73   bp_pack_value (bp, TREE_CODE (expr), 16);
  74   if (!TYPE_P (expr))
  75     {
  76       bp_pack_value (bp, TREE_SIDE_EFFECTS (expr), 1);
  77       bp_pack_value (bp, TREE_CONSTANT (expr), 1);
  78       bp_pack_value (bp, TREE_READONLY (expr), 1);
  79
  80       /* TREE_PUBLIC is used on types to indicate that the type
  81          has a TYPE_CACHED_VALUES vector.  This is not streamed out,
  82          so we skip it here.  */
  83       bp_pack_value (bp, TREE_PUBLIC (expr), 1);
  84     }
  85   else
  86     bp_pack_value (bp, 0, 4);
  87   bp_pack_value (bp, TREE_ADDRESSABLE (expr), 1);
  88   bp_pack_value (bp, TREE_THIS_VOLATILE (expr), 1);
  89   if (DECL_P (expr))
  90     {
  91       bp_pack_value (bp, DECL_UNSIGNED (expr), 1);
  92       bp_pack_value (bp, DECL_NAMELESS (expr), 1);
  93     }
  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   else
 111     bp_pack_value (bp, 0, 1);
 112   bp_pack_value (bp, TREE_PROTECTED (expr), 1);
 113   bp_pack_value (bp, TREE_DEPRECATED (expr), 1);
 114   if (TYPE_P (expr))
 115     {
 116       if (AGGREGATE_TYPE_P (expr))
 117         bp_pack_value (bp, TYPE_REVERSE_STORAGE_ORDER (expr), 1);
 118       else
 119         bp_pack_value (bp, TYPE_SATURATING (expr), 1);
 120       bp_pack_value (bp, TYPE_ADDR_SPACE (expr), 8);
 121     }
 122   else if (TREE_CODE (expr) == BIT_FIELD_REF || TREE_CODE (expr) == MEM_REF)
 123     {
 124       bp_pack_value (bp, REF_REVERSE_STORAGE_ORDER (expr), 1);
 125       bp_pack_value (bp, 0, 8);
 126     }
 127   else if (TREE_CODE (expr) == SSA_NAME)
 128     {
 129       bp_pack_value (bp, SSA_NAME_IS_DEFAULT_DEF (expr), 1);
 130       bp_pack_value (bp, 0, 8);
 131     }
 132   else
 133     bp_pack_value (bp, 0, 9);
 134 }
 135
 136
 137 /* Pack all the non-pointer fields of the TS_INTEGER_CST structure of
 138    expression EXPR into bitpack BP.  */
 139
 140 static void
 141 pack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
 142 {
 143   int i;
 144   /* Note that the number of elements has already been written out in
 145      streamer_write_tree_header.  */
 146   for (i = 0; i < TREE_INT_CST_EXT_NUNITS (expr); i++)
 147     bp_pack_var_len_int (bp, TREE_INT_CST_ELT (expr, i));
 148 }
 149
 150
 151 /* Pack all the non-pointer fields of the TS_REAL_CST structure of
 152    expression EXPR into bitpack BP.  */
 153
 154 static void
 155 pack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
 156 {
 157   unsigned i;
 158   REAL_VALUE_TYPE r;
 159
 160   r = TREE_REAL_CST (expr);
 161   bp_pack_value (bp, r.cl, 2);
 162   bp_pack_value (bp, r.decimal, 1);
 163   bp_pack_value (bp, r.sign, 1);
 164   bp_pack_value (bp, r.signalling, 1);
 165   bp_pack_value (bp, r.canonical, 1);
 166   bp_pack_value (bp, r.uexp, EXP_BITS);
 167   for (i = 0; i < SIGSZ; i++)
 168     bp_pack_value (bp, r.sig[i], HOST_BITS_PER_LONG);
 169 }
 170
 171
 172 /* Pack all the non-pointer fields of the TS_FIXED_CST structure of
 173    expression EXPR into bitpack BP.  */
 174
 175 static void
 176 pack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
 177 {
 178   struct fixed_value fv = TREE_FIXED_CST (expr);
 179   bp_pack_machine_mode (bp, fv.mode);
 180   bp_pack_var_len_int (bp, fv.data.low);
 181   bp_pack_var_len_int (bp, fv.data.high);
 182 }
 183
 184 /* Pack all the non-pointer fields of the TS_DECL_COMMON structure
 185    of expression EXPR into bitpack BP.  */
 186
 187 static void
 188 pack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
 189 {
 190   bp_pack_machine_mode (bp, DECL_MODE (expr));
 191   bp_pack_value (bp, DECL_NONLOCAL (expr), 1);
 192   bp_pack_value (bp, DECL_VIRTUAL_P (expr), 1);
 193   bp_pack_value (bp, DECL_IGNORED_P (expr), 1);
 194   bp_pack_value (bp, DECL_ABSTRACT_P (expr), 1);
 195   bp_pack_value (bp, DECL_ARTIFICIAL (expr), 1);
 196   bp_pack_value (bp, DECL_USER_ALIGN (expr), 1);
 197   bp_pack_value (bp, DECL_PRESERVE_P (expr), 1);
 198   bp_pack_value (bp, DECL_EXTERNAL (expr), 1);
 199   bp_pack_value (bp, DECL_GIMPLE_REG_P (expr), 1);
 200   bp_pack_var_len_unsigned (bp, DECL_ALIGN (expr));
 201
 202   if (TREE_CODE (expr) == LABEL_DECL)
 203     {
 204       /* Note that we do not write LABEL_DECL_UID.  The reader will
 205          always assume an initial value of -1 so that the
 206          label_to_block_map is recreated by gimple_set_bb.  */
 207       bp_pack_var_len_unsigned (bp, EH_LANDING_PAD_NR (expr));
 208     }
 209
 210   if (TREE_CODE (expr) == FIELD_DECL)
 211     {
 212       bp_pack_value (bp, DECL_PACKED (expr), 1);
 213       bp_pack_value (bp, DECL_NONADDRESSABLE_P (expr), 1);
 214       bp_pack_value (bp, DECL_PADDING_P (expr), 1);
 215       bp_pack_value (bp, expr->decl_common.off_align, 8);
 216     }
 217
 218   if (VAR_P (expr))
 219     {
 220       bp_pack_value (bp, DECL_HAS_DEBUG_EXPR_P (expr), 1);
 221       bp_pack_value (bp, DECL_NONLOCAL_FRAME (expr), 1);
 222     }
 223
 224   if (TREE_CODE (expr) == RESULT_DECL
 225       || TREE_CODE (expr) == PARM_DECL
 226       || VAR_P (expr))
 227     {
 228       bp_pack_value (bp, DECL_BY_REFERENCE (expr), 1);
 229       if (VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 230         bp_pack_value (bp, DECL_HAS_VALUE_EXPR_P (expr), 1);
 231     }
 232 }
 233
 234
 235 /* Pack all the non-pointer fields of the TS_DECL_WRTL structure
 236    of expression EXPR into bitpack BP.  */
 237
 238 static void
 239 pack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
 240 {
 241   bp_pack_value (bp, DECL_REGISTER (expr), 1);
 242 }
 243
 244
 245 /* Pack all the non-pointer fields of the TS_DECL_WITH_VIS structure
 246    of expression EXPR into bitpack BP.  */
 247
 248 static void
 249 pack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
 250 {
 251   bp_pack_value (bp, DECL_COMMON (expr), 1);
 252   bp_pack_value (bp, DECL_DLLIMPORT_P (expr), 1);
 253   bp_pack_value (bp, DECL_WEAK (expr), 1);
 254   bp_pack_value (bp, DECL_SEEN_IN_BIND_EXPR_P (expr),  1);
 255   bp_pack_value (bp, DECL_COMDAT (expr),  1);
 256   bp_pack_value (bp, DECL_VISIBILITY (expr),  2);
 257   bp_pack_value (bp, DECL_VISIBILITY_SPECIFIED (expr),  1);
 258
 259   if (VAR_P (expr))
 260     {
 261       bp_pack_value (bp, DECL_HARD_REGISTER (expr), 1);
 262       /* DECL_IN_TEXT_SECTION is set during final asm output only. */
 263       bp_pack_value (bp, DECL_IN_CONSTANT_POOL (expr), 1);
 264     }
 265
 266   if (TREE_CODE (expr) == FUNCTION_DECL)
 267     {
 268       bp_pack_value (bp, DECL_FINAL_P (expr), 1);
 269       bp_pack_value (bp, DECL_CXX_CONSTRUCTOR_P (expr), 1);
 270       bp_pack_value (bp, DECL_CXX_DESTRUCTOR_P (expr), 1);
 271     }
 272 }
 273
 274
 275 /* Pack all the non-pointer fields of the TS_FUNCTION_DECL structure
 276    of expression EXPR into bitpack BP.  */
 277
 278 static void
 279 pack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
 280 {
 281   bp_pack_enum (bp, built_in_class, BUILT_IN_LAST,
 282                 DECL_BUILT_IN_CLASS (expr));
 283   bp_pack_value (bp, DECL_STATIC_CONSTRUCTOR (expr), 1);
 284   bp_pack_value (bp, DECL_STATIC_DESTRUCTOR (expr), 1);
 285   bp_pack_value (bp, DECL_UNINLINABLE (expr), 1);
 286   bp_pack_value (bp, DECL_POSSIBLY_INLINED (expr), 1);
 287   bp_pack_value (bp, DECL_IS_NOVOPS (expr), 1);
 288   bp_pack_value (bp, DECL_IS_RETURNS_TWICE (expr), 1);
 289   bp_pack_value (bp, DECL_IS_MALLOC (expr), 1);
 290   bp_pack_value (bp, DECL_IS_OPERATOR_NEW (expr), 1);
 291   bp_pack_value (bp, DECL_DECLARED_INLINE_P (expr), 1);
 292   bp_pack_value (bp, DECL_STATIC_CHAIN (expr), 1);
 293   bp_pack_value (bp, DECL_NO_INLINE_WARNING_P (expr), 1);
 294   bp_pack_value (bp, DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr), 1);
 295   bp_pack_value (bp, DECL_NO_LIMIT_STACK (expr), 1);
 296   bp_pack_value (bp, DECL_DISREGARD_INLINE_LIMITS (expr), 1);
 297   bp_pack_value (bp, DECL_PURE_P (expr), 1);
 298   bp_pack_value (bp, DECL_LOOPING_CONST_OR_PURE_P (expr), 1);
 299   if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
 300     bp_pack_value (bp, DECL_FUNCTION_CODE (expr), 12);
 301 }
 302
 303
 304 /* Pack all the non-pointer fields of the TS_TYPE_COMMON structure
 305    of expression EXPR into bitpack BP.  */
 306
 307 static void
 308 pack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
 309 {
 310   /* for VECTOR_TYPE, TYPE_MODE reevaluates the mode using target_flags
 311      not necessary valid in a global context.
 312      Use the raw value previously set by layout_type.  */
 313   bp_pack_machine_mode (bp, TYPE_MODE_RAW (expr));
 314   bp_pack_value (bp, TYPE_STRING_FLAG (expr), 1);
 315   /* TYPE_NO_FORCE_BLK is private to stor-layout and need
 316      no streaming.  */
 317   bp_pack_value (bp, TYPE_NEEDS_CONSTRUCTING (expr), 1);
 318   bp_pack_value (bp, TYPE_PACKED (expr), 1);
 319   bp_pack_value (bp, TYPE_RESTRICT (expr), 1);
 320   bp_pack_value (bp, TYPE_USER_ALIGN (expr), 1);
 321   bp_pack_value (bp, TYPE_READONLY (expr), 1);
 322   /* We used to stream TYPE_ALIAS_SET == 0 information to let frontends mark
 323      types that are opaque for TBAA.  This however did not work as intended,
 324      because TYPE_ALIAS_SET == 0 was regularly lost in type merging.  */
 325   if (RECORD_OR_UNION_TYPE_P (expr))
 326     {
 327       bp_pack_value (bp, TYPE_TRANSPARENT_AGGR (expr), 1);
 328       bp_pack_value (bp, TYPE_FINAL_P (expr), 1);
 329     }
 330   else if (TREE_CODE (expr) == ARRAY_TYPE)
 331     bp_pack_value (bp, TYPE_NONALIASED_COMPONENT (expr), 1);
 332   if (AGGREGATE_TYPE_P (expr))
 333     bp_pack_value (bp, TYPE_TYPELESS_STORAGE (expr), 1);
 334   bp_pack_value (bp, TYPE_EMPTY_P (expr), 1);
 335   bp_pack_var_len_unsigned (bp, TYPE_PRECISION (expr));
 336   bp_pack_var_len_unsigned (bp, TYPE_ALIGN (expr));
 337 }
 338
 339
 340 /* Pack all the non-pointer fields of the TS_BLOCK structure
 341    of expression EXPR into bitpack BP.  */
 342
 343 static void
 344 pack_ts_block_value_fields (struct output_block *ob,
 345                             struct bitpack_d *bp, tree expr)
 346 {
 347   bp_pack_value (bp, BLOCK_ABSTRACT (expr), 1);
 348   /* BLOCK_NUMBER is recomputed.  */
 349   /* Stream BLOCK_SOURCE_LOCATION for the limited cases we can handle - those
 350      that represent inlined function scopes.
 351      For the rest them on the floor instead of ICEing in dwarf2out.c.  */
 352   if (inlined_function_outer_scope_p (expr))
 353     stream_output_location (ob, bp, BLOCK_SOURCE_LOCATION (expr));
 354   else
 355     stream_output_location (ob, bp, UNKNOWN_LOCATION);
 356 }
 357
 358 /* Pack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL structure
 359    of expression EXPR into bitpack BP.  */
 360
 361 static void
 362 pack_ts_translation_unit_decl_value_fields (struct output_block *ob,
 363                                             struct bitpack_d *bp, tree expr)
 364 {
 365   bp_pack_string (ob, bp, TRANSLATION_UNIT_LANGUAGE (expr), true);
 366 }
 367
 368
 369 /* Pack all the non-pointer fields of the TS_OMP_CLAUSE structure
 370    of expression EXPR into bitpack BP.  */
 371
 372 static void
 373 pack_ts_omp_clause_value_fields (struct output_block *ob,
 374                                  struct bitpack_d *bp, tree expr)
 375 {
 376   stream_output_location (ob, bp, OMP_CLAUSE_LOCATION (expr));
 377   switch (OMP_CLAUSE_CODE (expr))
 378     {
 379     case OMP_CLAUSE_DEFAULT:
 380       bp_pack_enum (bp, omp_clause_default_kind, OMP_CLAUSE_DEFAULT_LAST,
 381                     OMP_CLAUSE_DEFAULT_KIND (expr));
 382       break;
 383     case OMP_CLAUSE_SCHEDULE:
 384       bp_pack_enum (bp, omp_clause_schedule_kind, OMP_CLAUSE_SCHEDULE_LAST,
 385                     OMP_CLAUSE_SCHEDULE_KIND (expr));
 386       break;
 387     case OMP_CLAUSE_DEPEND:
 388       bp_pack_enum (bp, omp_clause_depend_kind, OMP_CLAUSE_DEPEND_LAST,
 389                     OMP_CLAUSE_DEPEND_KIND (expr));
 390       break;
 391     case OMP_CLAUSE_MAP:
 392       bp_pack_enum (bp, gomp_map_kind, GOMP_MAP_LAST,
 393                     OMP_CLAUSE_MAP_KIND (expr));
 394       break;
 395     case OMP_CLAUSE_PROC_BIND:
 396       bp_pack_enum (bp, omp_clause_proc_bind_kind, OMP_CLAUSE_PROC_BIND_LAST,
 397                     OMP_CLAUSE_PROC_BIND_KIND (expr));
 398       break;
 399     case OMP_CLAUSE_REDUCTION:
 400       bp_pack_enum (bp, tree_code, MAX_TREE_CODES,
 401                     OMP_CLAUSE_REDUCTION_CODE (expr));
 402       break;
 403     default:
 404       break;
 405     }
 406 }
 407
 408
 409 /* Pack all the bitfields in EXPR into a bit pack.  */
 410
 411 void
 412 streamer_write_tree_bitfields (struct output_block *ob, tree expr)
 413 {
 414   bitpack_d bp = bitpack_create (ob->main_stream);
 415   enum tree_code code;
 416
 417   code = TREE_CODE (expr);
 418
 419   /* Note that all these functions are highly sensitive to changes in
 420      the types and sizes of each of the fields being packed.  */
 421   pack_ts_base_value_fields (&bp, expr);
 422
 423   if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 424     pack_ts_int_cst_value_fields (&bp, expr);
 425
 426   if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
 427     pack_ts_real_cst_value_fields (&bp, expr);
 428
 429   if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
 430     pack_ts_fixed_cst_value_fields (&bp, expr);
 431
 432   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 433     stream_output_location (ob, &bp, DECL_SOURCE_LOCATION (expr));
 434
 435   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 436     pack_ts_decl_common_value_fields (&bp, expr);
 437
 438   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
 439     pack_ts_decl_wrtl_value_fields (&bp, expr);
 440
 441   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 442     pack_ts_decl_with_vis_value_fields (&bp, expr);
 443
 444   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 445     pack_ts_function_decl_value_fields (&bp, expr);
 446
 447   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 448     pack_ts_type_common_value_fields (&bp, expr);
 449
 450   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 451     {
 452       stream_output_location (ob, &bp, EXPR_LOCATION (expr));
 453       if (code == MEM_REF
 454           || code == TARGET_MEM_REF)
 455         {
 456           bp_pack_value (&bp, MR_DEPENDENCE_CLIQUE (expr), sizeof (short) * 8);
 457           if (MR_DEPENDENCE_CLIQUE (expr) != 0)
 458             bp_pack_value (&bp, MR_DEPENDENCE_BASE (expr), sizeof (short) * 8);
 459         }
 460     }
 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_OPTIMIZATION))
 469     cl_optimization_stream_out (&bp, TREE_OPTIMIZATION (expr));
 470
 471   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 472     bp_pack_var_len_unsigned (&bp, vec_safe_length (BINFO_BASE_ACCESSES (expr)));
 473
 474   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 475     bp_pack_var_len_unsigned (&bp, CONSTRUCTOR_NELTS (expr));
 476
 477   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION)
 478       /* Don't stream these when passing things to a different target.  */
 479       && !lto_stream_offload_p)
 480     cl_target_option_stream_out (ob, &bp, TREE_TARGET_OPTION (expr));
 481
 482   if (code == OMP_CLAUSE)
 483     pack_ts_omp_clause_value_fields (ob, &bp, expr);
 484
 485   streamer_write_bitpack (&bp);
 486 }
 487
 488
 489 /* Emit the chain of tree nodes starting at T.  OB is the output block
 490    to write to.  REF_P is true if chain elements should be emitted
 491    as references.  */
 492
 493 void
 494 streamer_write_chain (struct output_block *ob, tree t, bool ref_p)
 495 {
 496   while (t)
 497     {
 498       /* We avoid outputting external vars or functions by reference
 499          to the global decls section as we do not want to have them
 500          enter decl merging.  This is, of course, only for the call
 501          for streaming BLOCK_VARS, but other callers are safe.
 502          See also lto-streamer-out.c:DFS_write_tree_body.  */
 503       if (VAR_OR_FUNCTION_DECL_P (t)
 504           && DECL_EXTERNAL (t))
 505         stream_write_tree_shallow_non_ref (ob, t, ref_p);
 506       else
 507         stream_write_tree (ob, t, ref_p);
 508
 509       t = TREE_CHAIN (t);
 510     }
 511
 512   /* Write a sentinel to terminate the chain.  */
 513   stream_write_tree (ob, NULL_TREE, ref_p);
 514 }
 515
 516
 517 /* Write all pointer fields in the TS_COMMON structure of EXPR to output
 518    block OB.  If REF_P is true, write a reference to EXPR's pointer
 519    fields.  */
 520
 521 static void
 522 write_ts_common_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 523 {
 524   if (TREE_CODE (expr) != IDENTIFIER_NODE)
 525     stream_write_tree (ob, TREE_TYPE (expr), ref_p);
 526 }
 527
 528
 529 /* Write all pointer fields in the TS_VECTOR structure of EXPR to output
 530    block OB.  If REF_P is true, write a reference to EXPR's pointer
 531    fields.  */
 532
 533 static void
 534 write_ts_vector_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 535 {
 536   /* Note that the number of elements for EXPR has already been emitted
 537      in EXPR's header (see streamer_write_tree_header).  */
 538   unsigned int count = vector_cst_encoded_nelts (expr);
 539   for (unsigned int i = 0; i < count; ++i)
 540     stream_write_tree (ob, VECTOR_CST_ENCODED_ELT (expr, i), ref_p);
 541 }
 542
 543
 544 /* Write all pointer fields in the TS_POLY_INT_CST structure of EXPR to
 545    output block OB.  If REF_P is true, write a reference to EXPR's pointer
 546    fields.  */
 547
 548 static void
 549 write_ts_poly_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 550 {
 551   for (unsigned int i = 0; i < NUM_POLY_INT_COEFFS; ++i)
 552     stream_write_tree (ob, POLY_INT_CST_COEFF (expr, i), ref_p);
 553 }
 554
 555
 556 /* Write all pointer fields in the TS_COMPLEX 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_complex_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 562 {
 563   stream_write_tree (ob, TREE_REALPART (expr), ref_p);
 564   stream_write_tree (ob, TREE_IMAGPART (expr), ref_p);
 565 }
 566
 567
 568 /* Write all pointer fields in the TS_DECL_MINIMAL structure of EXPR
 569    to output block OB.  If REF_P is true, write a reference to EXPR's
 570    pointer fields.  */
 571
 572 static void
 573 write_ts_decl_minimal_tree_pointers (struct output_block *ob, tree expr,
 574                                      bool ref_p)
 575 {
 576   /* Drop names that were created for anonymous entities.  */
 577   if (DECL_NAME (expr)
 578       && TREE_CODE (DECL_NAME (expr)) == IDENTIFIER_NODE
 579       && anon_aggrname_p (DECL_NAME (expr)))
 580     stream_write_tree (ob, NULL_TREE, ref_p);
 581   else
 582     stream_write_tree (ob, DECL_NAME (expr), ref_p);
 583   if (TREE_CODE (expr) != TRANSLATION_UNIT_DECL
 584       && ! DECL_CONTEXT (expr))
 585     stream_write_tree (ob, (*all_translation_units)[0], ref_p);
 586   else
 587     stream_write_tree (ob, DECL_CONTEXT (expr), ref_p);
 588 }
 589
 590
 591 /* Write all pointer fields in the TS_DECL_COMMON structure of EXPR to
 592    output block OB.  If REF_P is true, write a reference to EXPR's
 593    pointer fields.  */
 594
 595 static void
 596 write_ts_decl_common_tree_pointers (struct output_block *ob, tree expr,
 597                                     bool ref_p)
 598 {
 599   stream_write_tree (ob, DECL_SIZE (expr), ref_p);
 600   stream_write_tree (ob, DECL_SIZE_UNIT (expr), ref_p);
 601
 602   /* Note, DECL_INITIAL is not handled here.  Since DECL_INITIAL needs
 603      special handling in LTO, it must be handled by streamer hooks.  */
 604
 605   stream_write_tree (ob, DECL_ATTRIBUTES (expr), ref_p);
 606   stream_write_tree (ob, DECL_ABSTRACT_ORIGIN (expr), ref_p);
 607
 608   if ((VAR_P (expr) || TREE_CODE (expr) == PARM_DECL)
 609       && DECL_HAS_VALUE_EXPR_P (expr))
 610     stream_write_tree (ob, DECL_VALUE_EXPR (expr), ref_p);
 611
 612   if (VAR_P (expr))
 613     stream_write_tree (ob, DECL_DEBUG_EXPR (expr), ref_p);
 614 }
 615
 616
 617 /* Write all pointer fields in the TS_DECL_NON_COMMON structure of
 618    EXPR to output block OB.  If REF_P is true, write a reference to EXPR's
 619    pointer fields.  */
 620
 621 static void
 622 write_ts_decl_non_common_tree_pointers (struct output_block *ob, tree expr,
 623                                         bool ref_p)
 624 {
 625   if (TREE_CODE (expr) == TYPE_DECL)
 626     stream_write_tree (ob, DECL_ORIGINAL_TYPE (expr), ref_p);
 627 }
 628
 629
 630 /* Write all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
 631    to output block OB.  If REF_P is true, write a reference to EXPR's
 632    pointer fields.  */
 633
 634 static void
 635 write_ts_decl_with_vis_tree_pointers (struct output_block *ob, tree expr,
 636                                       bool ref_p)
 637 {
 638   /* Make sure we don't inadvertently set the assembler name.  */
 639   if (DECL_ASSEMBLER_NAME_SET_P (expr))
 640     stream_write_tree (ob, DECL_ASSEMBLER_NAME (expr), ref_p);
 641   else
 642     stream_write_tree (ob, NULL_TREE, false);
 643 }
 644
 645
 646 /* Write all pointer fields in the TS_FIELD_DECL structure of EXPR to
 647    output block OB.  If REF_P is true, write a reference to EXPR's
 648    pointer fields.  */
 649
 650 static void
 651 write_ts_field_decl_tree_pointers (struct output_block *ob, tree expr,
 652                                    bool ref_p)
 653 {
 654   stream_write_tree (ob, DECL_FIELD_OFFSET (expr), ref_p);
 655   stream_write_tree (ob, DECL_BIT_FIELD_TYPE (expr), ref_p);
 656   stream_write_tree (ob, DECL_BIT_FIELD_REPRESENTATIVE (expr), ref_p);
 657   stream_write_tree (ob, DECL_FIELD_BIT_OFFSET (expr), ref_p);
 658   stream_write_tree (ob, DECL_FCONTEXT (expr), ref_p);
 659 }
 660
 661
 662 /* Write all pointer fields in the TS_FUNCTION_DECL structure of EXPR
 663    to output block OB.  If REF_P is true, write a reference to EXPR's
 664    pointer fields.  */
 665
 666 static void
 667 write_ts_function_decl_tree_pointers (struct output_block *ob, tree expr,
 668                                       bool ref_p)
 669 {
 670   stream_write_tree (ob, DECL_VINDEX (expr), ref_p);
 671   /* DECL_STRUCT_FUNCTION is handled by lto_output_function.  */
 672   stream_write_tree (ob, DECL_FUNCTION_PERSONALITY (expr), ref_p);
 673   /* Don't stream these when passing things to a different target.  */
 674   if (!lto_stream_offload_p)
 675     stream_write_tree (ob, DECL_FUNCTION_SPECIFIC_TARGET (expr), ref_p);
 676   stream_write_tree (ob, DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr), ref_p);
 677 }
 678
 679
 680 /* Write all pointer fields in the TS_TYPE_COMMON structure of EXPR to
 681    output block OB.  If REF_P is true, write a reference to EXPR's
 682    pointer fields.  */
 683
 684 static void
 685 write_ts_type_common_tree_pointers (struct output_block *ob, tree expr,
 686                                     bool ref_p)
 687 {
 688   stream_write_tree (ob, TYPE_SIZE (expr), ref_p);
 689   stream_write_tree (ob, TYPE_SIZE_UNIT (expr), ref_p);
 690   stream_write_tree (ob, TYPE_ATTRIBUTES (expr), ref_p);
 691   stream_write_tree (ob, TYPE_NAME (expr), ref_p);
 692   /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
 693      reconstructed during fixup.  */
 694   /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
 695      during fixup.  */
 696   stream_write_tree (ob, TYPE_MAIN_VARIANT (expr), ref_p);
 697   stream_write_tree (ob, TYPE_CONTEXT (expr), ref_p);
 698   /* TYPE_CANONICAL is re-computed during type merging, so no need
 699      to stream it here.  */
 700   stream_write_tree (ob, TYPE_STUB_DECL (expr), ref_p);
 701 }
 702
 703 /* Write all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
 704    to output block OB.  If REF_P is true, write a reference to EXPR's
 705    pointer fields.  */
 706
 707 static void
 708 write_ts_type_non_common_tree_pointers (struct output_block *ob, tree expr,
 709                                         bool ref_p)
 710 {
 711   if (TREE_CODE (expr) == ENUMERAL_TYPE)
 712     stream_write_tree (ob, TYPE_VALUES (expr), ref_p);
 713   else if (TREE_CODE (expr) == ARRAY_TYPE)
 714     stream_write_tree (ob, TYPE_DOMAIN (expr), ref_p);
 715   else if (RECORD_OR_UNION_TYPE_P (expr))
 716     streamer_write_chain (ob, TYPE_FIELDS (expr), ref_p);
 717   else if (TREE_CODE (expr) == FUNCTION_TYPE
 718            || TREE_CODE (expr) == METHOD_TYPE)
 719     stream_write_tree (ob, TYPE_ARG_TYPES (expr), ref_p);
 720
 721   if (!POINTER_TYPE_P (expr))
 722     stream_write_tree (ob, TYPE_MIN_VALUE_RAW (expr), ref_p);
 723   stream_write_tree (ob, TYPE_MAX_VALUE_RAW (expr), ref_p);
 724 }
 725
 726
 727 /* Write all pointer fields in the TS_LIST structure of EXPR to output
 728    block OB.  If REF_P is true, write a reference to EXPR's pointer
 729    fields.  */
 730
 731 static void
 732 write_ts_list_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 733 {
 734   stream_write_tree (ob, TREE_PURPOSE (expr), ref_p);
 735   stream_write_tree (ob, TREE_VALUE (expr), ref_p);
 736   stream_write_tree (ob, TREE_CHAIN (expr), ref_p);
 737 }
 738
 739
 740 /* Write all pointer fields in the TS_VEC structure of EXPR to output
 741    block OB.  If REF_P is true, write a reference to EXPR's pointer
 742    fields.  */
 743
 744 static void
 745 write_ts_vec_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 746 {
 747   int i;
 748
 749   /* Note that the number of slots for EXPR has already been emitted
 750      in EXPR's header (see streamer_write_tree_header).  */
 751   for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
 752     stream_write_tree (ob, TREE_VEC_ELT (expr, i), ref_p);
 753 }
 754
 755
 756 /* Write all pointer fields in the TS_EXP 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_exp_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 762 {
 763   int i;
 764
 765   for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
 766     stream_write_tree (ob, TREE_OPERAND (expr, i), ref_p);
 767   stream_write_tree (ob, TREE_BLOCK (expr), ref_p);
 768 }
 769
 770
 771 /* Write all pointer fields in the TS_BLOCK structure of EXPR to output
 772    block OB.  If REF_P is true, write a reference to EXPR's pointer
 773    fields.  */
 774
 775 static void
 776 write_ts_block_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 777 {
 778   streamer_write_chain (ob, BLOCK_VARS (expr), ref_p);
 779
 780   stream_write_tree (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
 781
 782   /* Stream BLOCK_ABSTRACT_ORIGIN for the limited cases we can handle - those
 783      that represent inlined function scopes.
 784      For the rest them on the floor instead of ICEing in dwarf2out.c, but
 785      keep the notion of whether the block is an inlined block by refering
 786      to itself for the sake of tree_nonartificial_location.  */
 787   if (inlined_function_outer_scope_p (expr))
 788     {
 789       tree ultimate_origin = block_ultimate_origin (expr);
 790       stream_write_tree (ob, ultimate_origin, ref_p);
 791     }
 792   else
 793     stream_write_tree (ob, (BLOCK_ABSTRACT_ORIGIN (expr)
 794                             ? expr : NULL_TREE), ref_p);
 795   /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
 796      for early inlined BLOCKs so drop it on the floor instead of ICEing in
 797      dwarf2out.c.  */
 798
 799   /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
 800      streaming time.  */
 801
 802   /* Do not output BLOCK_SUBBLOCKS.  Instead on streaming-in this
 803      list is re-constructed from BLOCK_SUPERCONTEXT.  */
 804 }
 805
 806
 807 /* Write all pointer fields in the TS_BINFO structure of EXPR to output
 808    block OB.  If REF_P is true, write a reference to EXPR's pointer
 809    fields.  */
 810
 811 static void
 812 write_ts_binfo_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
 813 {
 814   unsigned i;
 815   tree t;
 816
 817   /* Note that the number of BINFO slots has already been emitted in
 818      EXPR's header (see streamer_write_tree_header) because this length
 819      is needed to build the empty BINFO node on the reader side.  */
 820   FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (expr), i, t)
 821     stream_write_tree (ob, t, ref_p);
 822   stream_write_tree (ob, NULL_TREE, false);
 823
 824   stream_write_tree (ob, BINFO_OFFSET (expr), ref_p);
 825   stream_write_tree (ob, BINFO_VTABLE (expr), ref_p);
 826   stream_write_tree (ob, BINFO_VPTR_FIELD (expr), ref_p);
 827
 828   /* The number of BINFO_BASE_ACCESSES has already been emitted in
 829      EXPR's bitfield section.  */
 830   FOR_EACH_VEC_SAFE_ELT (BINFO_BASE_ACCESSES (expr), i, t)
 831     stream_write_tree (ob, t, ref_p);
 832
 833   /* Do not walk BINFO_INHERITANCE_CHAIN, BINFO_SUBVTT_INDEX
 834      and BINFO_VPTR_INDEX; these are used by C++ FE only.  */
 835 }
 836
 837
 838 /* Write all pointer fields in the TS_CONSTRUCTOR structure of EXPR to
 839    output block OB.  If REF_P is true, write a reference to EXPR's
 840    pointer fields.  */
 841
 842 static void
 843 write_ts_constructor_tree_pointers (struct output_block *ob, tree expr,
 844                                     bool ref_p)
 845 {
 846   unsigned i;
 847   tree index, value;
 848
 849   FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (expr), i, index, value)
 850     {
 851       stream_write_tree (ob, index, ref_p);
 852       stream_write_tree (ob, value, ref_p);
 853     }
 854 }
 855
 856
 857 /* Write all pointer fields in the TS_OMP_CLAUSE structure of EXPR
 858    to output block OB.  If REF_P is true, write a reference to EXPR's
 859    pointer fields.  */
 860
 861 static void
 862 write_ts_omp_clause_tree_pointers (struct output_block *ob, tree expr,
 863                                    bool ref_p)
 864 {
 865   int i;
 866   for (i = 0; i < omp_clause_num_ops[OMP_CLAUSE_CODE (expr)]; i++)
 867     stream_write_tree (ob, OMP_CLAUSE_OPERAND (expr, i), ref_p);
 868   if (OMP_CLAUSE_CODE (expr) == OMP_CLAUSE_REDUCTION)
 869     {
 870       /* We don't stream these right now, handle it if streaming
 871          of them is needed.  */
 872       gcc_assert (OMP_CLAUSE_REDUCTION_GIMPLE_INIT (expr) == NULL);
 873       gcc_assert (OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (expr) == NULL);
 874     }
 875   stream_write_tree (ob, OMP_CLAUSE_CHAIN (expr), ref_p);
 876 }
 877
 878
 879 /* Write all pointer fields in EXPR to output block OB.  If REF_P is true,
 880    the leaves of EXPR are emitted as references.  */
 881
 882 void
 883 streamer_write_tree_body (struct output_block *ob, tree expr, bool ref_p)
 884 {
 885   enum tree_code code;
 886
 887   lto_stats.num_tree_bodies_output++;
 888
 889   code = TREE_CODE (expr);
 890
 891   if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
 892     write_ts_common_tree_pointers (ob, expr, ref_p);
 893
 894   if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 895     write_ts_vector_tree_pointers (ob, expr, ref_p);
 896
 897   if (CODE_CONTAINS_STRUCT (code, TS_POLY_INT_CST))
 898     write_ts_poly_tree_pointers (ob, expr, ref_p);
 899
 900   if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
 901     write_ts_complex_tree_pointers (ob, expr, ref_p);
 902
 903   if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
 904     write_ts_decl_minimal_tree_pointers (ob, expr, ref_p);
 905
 906   if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
 907     write_ts_decl_common_tree_pointers (ob, expr, ref_p);
 908
 909   if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
 910     write_ts_decl_non_common_tree_pointers (ob, expr, ref_p);
 911
 912   if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
 913     write_ts_decl_with_vis_tree_pointers (ob, expr, ref_p);
 914
 915   if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
 916     write_ts_field_decl_tree_pointers (ob, expr, ref_p);
 917
 918   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
 919     write_ts_function_decl_tree_pointers (ob, expr, ref_p);
 920
 921   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
 922     write_ts_type_common_tree_pointers (ob, expr, ref_p);
 923
 924   if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
 925     write_ts_type_non_common_tree_pointers (ob, expr, ref_p);
 926
 927   if (CODE_CONTAINS_STRUCT (code, TS_LIST))
 928     write_ts_list_tree_pointers (ob, expr, ref_p);
 929
 930   if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 931     write_ts_vec_tree_pointers (ob, expr, ref_p);
 932
 933   if (CODE_CONTAINS_STRUCT (code, TS_EXP))
 934     write_ts_exp_tree_pointers (ob, expr, ref_p);
 935
 936   if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
 937     write_ts_block_tree_pointers (ob, expr, ref_p);
 938
 939   if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 940     write_ts_binfo_tree_pointers (ob, expr, ref_p);
 941
 942   if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
 943     write_ts_constructor_tree_pointers (ob, expr, ref_p);
 944
 945   if (code == OMP_CLAUSE)
 946     write_ts_omp_clause_tree_pointers (ob, expr, ref_p);
 947 }
 948
 949
 950 /* Emit header information for tree EXPR to output block OB.  The header
 951    contains everything needed to instantiate an empty skeleton for
 952    EXPR on the reading side.  IX is the index into the streamer cache
 953    where EXPR is stored.  */
 954
 955 void
 956 streamer_write_tree_header (struct output_block *ob, tree expr)
 957 {
 958   enum LTO_tags tag;
 959   enum tree_code code;
 960
 961   /* We should not see any tree nodes not handled by the streamer.  */
 962   code = TREE_CODE (expr);
 963
 964   /* The header of a tree node consists of its tag, the size of
 965      the node, and any other information needed to instantiate
 966      EXPR on the reading side (such as the number of slots in
 967      variable sized nodes).  */
 968   tag = lto_tree_code_to_tag (code);
 969   streamer_write_record_start (ob, tag);
 970
 971   /* The text in strings and identifiers are completely emitted in
 972      the header.  */
 973   if (CODE_CONTAINS_STRUCT (code, TS_STRING))
 974     streamer_write_string_cst (ob, ob->main_stream, expr);
 975   else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
 976     write_identifier (ob, ob->main_stream, expr);
 977   else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
 978     {
 979       bitpack_d bp = bitpack_create (ob->main_stream);
 980       bp_pack_value (&bp, VECTOR_CST_LOG2_NPATTERNS (expr), 8);
 981       bp_pack_value (&bp, VECTOR_CST_NELTS_PER_PATTERN (expr), 8);
 982       streamer_write_bitpack (&bp);
 983     }
 984   else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
 985     streamer_write_hwi (ob, TREE_VEC_LENGTH (expr));
 986   else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
 987     streamer_write_uhwi (ob, BINFO_N_BASE_BINFOS (expr));
 988   else if (TREE_CODE (expr) == CALL_EXPR)
 989     streamer_write_uhwi (ob, call_expr_nargs (expr));
 990   else if (TREE_CODE (expr) == OMP_CLAUSE)
 991     streamer_write_uhwi (ob, OMP_CLAUSE_CODE (expr));
 992   else if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
 993     {
 994       gcc_checking_assert (TREE_INT_CST_NUNITS (expr));
 995       streamer_write_uhwi (ob, TREE_INT_CST_NUNITS (expr));
 996       streamer_write_uhwi (ob, TREE_INT_CST_EXT_NUNITS (expr));
 997     }
 998 }
 999
1000
1001 /* Emit the integer constant CST to output block OB.  If REF_P is true,
1002    CST's type will be emitted as a reference.  */
1003
1004 void
1005 streamer_write_integer_cst (struct output_block *ob, tree cst, bool ref_p)
1006 {
1007   int i;
1008   int len = TREE_INT_CST_NUNITS (cst);
1009   gcc_assert (!TREE_OVERFLOW (cst));
1010   streamer_write_record_start (ob, LTO_integer_cst);
1011   stream_write_tree (ob, TREE_TYPE (cst), ref_p);
1012   /* We're effectively streaming a non-sign-extended wide_int here,
1013      so there's no need to stream TREE_INT_CST_EXT_NUNITS or any
1014      array members beyond LEN.  We'll recreate the tree from the
1015      wide_int and the type.  */
1016   streamer_write_uhwi (ob, len);
1017   for (i = 0; i < len; i++)
1018     streamer_write_hwi (ob, TREE_INT_CST_ELT (cst, i));
1019 }