2013-08-02 Paolo Carlini <paolo.carlini@oracle.com>
[official-gcc.git] / gcc / tree-streamer-in.c
blob00f78a13df3a46c03ccf8418d442ef711391230a
1 /* Routines for reading trees from a file stream.
3 Copyright (C) 2011-2013 Free Software Foundation, Inc.
4 Contributed by Diego Novillo <dnovillo@google.com>
6 This file is part of GCC.
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.
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.
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/>. */
22 #include "config.h"
23 #include "system.h"
24 #include "coretypes.h"
25 #include "diagnostic.h"
26 #include "tree.h"
27 #include "tree-flow.h"
28 #include "tree-streamer.h"
29 #include "data-streamer.h"
30 #include "streamer-hooks.h"
31 #include "lto-streamer.h"
33 /* Read a STRING_CST from the string table in DATA_IN using input
34 block IB. */
36 tree
37 streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib)
39 unsigned int len;
40 const char * ptr;
42 ptr = streamer_read_indexed_string (data_in, ib, &len);
43 if (!ptr)
44 return NULL;
45 return build_string (len, ptr);
49 /* Read an IDENTIFIER from the string table in DATA_IN using input
50 block IB. */
52 static tree
53 input_identifier (struct data_in *data_in, struct lto_input_block *ib)
55 unsigned int len;
56 const char *ptr;
58 ptr = streamer_read_indexed_string (data_in, ib, &len);
59 if (!ptr)
60 return NULL;
61 return get_identifier_with_length (ptr, len);
65 /* Read a chain of tree nodes from input block IB. DATA_IN contains
66 tables and descriptors for the file being read. */
68 tree
69 streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in)
71 tree first, prev, curr;
73 /* The chain is written as NULL terminated list of trees. */
74 first = prev = NULL_TREE;
77 curr = stream_read_tree (ib, data_in);
78 if (prev)
79 TREE_CHAIN (prev) = curr;
80 else
81 first = curr;
83 prev = curr;
85 while (curr);
87 return first;
91 /* Unpack all the non-pointer fields of the TS_BASE structure of
92 expression EXPR from bitpack BP. */
94 static void
95 unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
97 /* Note that the code for EXPR has already been unpacked to create EXPR in
98 streamer_alloc_tree. */
99 if (!TYPE_P (expr))
101 TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1);
102 TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1);
103 TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
105 /* TREE_PUBLIC is used on types to indicate that the type
106 has a TYPE_CACHED_VALUES vector. This is not streamed out,
107 so we skip it here. */
108 TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1);
110 else
111 bp_unpack_value (bp, 4);
112 TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
113 TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1);
114 if (DECL_P (expr))
115 DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
116 else if (TYPE_P (expr))
117 TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
118 else
119 bp_unpack_value (bp, 1);
120 TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
121 if (TYPE_P (expr))
122 TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
123 else
124 TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
125 TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
126 TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
127 if (TREE_CODE (expr) != TREE_BINFO)
128 TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
129 TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
130 TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
131 if (TYPE_P (expr))
133 TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
134 TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
136 else if (TREE_CODE (expr) == SSA_NAME)
137 SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
138 else
139 bp_unpack_value (bp, 1);
143 /* Unpack all the non-pointer fields of the TS_INT_CST structure of
144 expression EXPR from bitpack BP. */
146 static void
147 unpack_ts_int_cst_value_fields (struct bitpack_d *bp, tree expr)
149 TREE_INT_CST_LOW (expr) = bp_unpack_var_len_unsigned (bp);
150 TREE_INT_CST_HIGH (expr) = bp_unpack_var_len_int (bp);
154 /* Unpack all the non-pointer fields of the TS_REAL_CST structure of
155 expression EXPR from bitpack BP. */
157 static void
158 unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
160 unsigned i;
161 REAL_VALUE_TYPE r;
162 REAL_VALUE_TYPE *rp;
164 r.cl = (unsigned) bp_unpack_value (bp, 2);
165 r.decimal = (unsigned) bp_unpack_value (bp, 1);
166 r.sign = (unsigned) bp_unpack_value (bp, 1);
167 r.signalling = (unsigned) bp_unpack_value (bp, 1);
168 r.canonical = (unsigned) bp_unpack_value (bp, 1);
169 r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
170 for (i = 0; i < SIGSZ; i++)
171 r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
173 rp = ggc_alloc_real_value ();
174 memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
175 TREE_REAL_CST_PTR (expr) = rp;
179 /* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
180 expression EXPR from bitpack BP. */
182 static void
183 unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
185 FIXED_VALUE_TYPE *fp = ggc_alloc_fixed_value ();
186 fp->mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
187 fp->data.low = bp_unpack_var_len_int (bp);
188 fp->data.high = bp_unpack_var_len_int (bp);
189 TREE_FIXED_CST_PTR (expr) = fp;
192 /* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
193 of expression EXPR from bitpack BP. */
195 static void
196 unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
198 DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
199 DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
200 DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
201 DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
202 DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
203 DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
204 DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
205 DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
206 DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
207 DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
208 DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
210 if (TREE_CODE (expr) == LABEL_DECL)
212 DECL_ERROR_ISSUED (expr) = (unsigned) bp_unpack_value (bp, 1);
213 EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
215 /* Always assume an initial value of -1 for LABEL_DECL_UID to
216 force gimple_set_bb to recreate label_to_block_map. */
217 LABEL_DECL_UID (expr) = -1;
220 if (TREE_CODE (expr) == FIELD_DECL)
222 DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
223 DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
224 expr->decl_common.off_align = bp_unpack_value (bp, 8);
227 if (TREE_CODE (expr) == VAR_DECL)
229 DECL_HAS_DEBUG_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
230 DECL_NONLOCAL_FRAME (expr) = (unsigned) bp_unpack_value (bp, 1);
233 if (TREE_CODE (expr) == RESULT_DECL
234 || TREE_CODE (expr) == PARM_DECL
235 || TREE_CODE (expr) == VAR_DECL)
237 DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
238 if (TREE_CODE (expr) == VAR_DECL
239 || TREE_CODE (expr) == PARM_DECL)
240 DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
245 /* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
246 of expression EXPR from bitpack BP. */
248 static void
249 unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
251 DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
255 /* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
256 of expression EXPR from bitpack BP. */
258 static void
259 unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
261 DECL_DEFER_OUTPUT (expr) = (unsigned) bp_unpack_value (bp, 1);
262 DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
263 DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
264 DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
265 DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
266 DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp, 1);
267 DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp, 2);
268 DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp, 1);
270 if (TREE_CODE (expr) == VAR_DECL)
272 DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
273 DECL_IN_TEXT_SECTION (expr) = (unsigned) bp_unpack_value (bp, 1);
274 DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
275 DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp, 3);
278 if (VAR_OR_FUNCTION_DECL_P (expr))
280 priority_type p;
281 p = (priority_type) bp_unpack_var_len_unsigned (bp);
282 SET_DECL_INIT_PRIORITY (expr, p);
287 /* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
288 of expression EXPR from bitpack BP. */
290 static void
291 unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
293 DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
294 BUILT_IN_LAST);
295 DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
296 DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
297 DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
298 DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
299 DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
300 DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
301 DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
302 DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
303 DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
304 DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
305 DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
306 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
307 = (unsigned) bp_unpack_value (bp, 1);
308 DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
309 DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
310 DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
311 DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
312 if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
314 DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
315 11);
316 if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
317 && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
318 fatal_error ("machine independent builtin code out of range");
319 else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
321 tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
322 if (!result || result == error_mark_node)
323 fatal_error ("target specific builtin not available");
326 if (DECL_STATIC_DESTRUCTOR (expr))
328 priority_type p;
329 p = (priority_type) bp_unpack_var_len_unsigned (bp);
330 SET_DECL_FINI_PRIORITY (expr, p);
335 /* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
336 of expression EXPR from bitpack BP. */
338 static void
339 unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
341 enum machine_mode mode;
343 mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
344 SET_TYPE_MODE (expr, mode);
345 TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
346 TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1);
347 TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1);
348 if (RECORD_OR_UNION_TYPE_P (expr))
349 TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
350 else if (TREE_CODE (expr) == ARRAY_TYPE)
351 TYPE_NONALIASED_COMPONENT (expr) = (unsigned) bp_unpack_value (bp, 1);
352 TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
353 TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
354 TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
355 TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
356 TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
357 TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp);
358 TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp);
362 /* Unpack all the non-pointer fields of the TS_BLOCK structure
363 of expression EXPR from bitpack BP. */
365 static void
366 unpack_ts_block_value_fields (struct data_in *data_in,
367 struct bitpack_d *bp, tree expr)
369 BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
370 /* BLOCK_NUMBER is recomputed. */
371 BLOCK_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
374 /* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
375 structure of expression EXPR from bitpack BP. */
377 static void
378 unpack_ts_translation_unit_decl_value_fields (struct data_in *data_in,
379 struct bitpack_d *bp, tree expr)
381 TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (bp_unpack_string (data_in, bp));
382 vec_safe_push (all_translation_units, expr);
385 /* Unpack a TS_TARGET_OPTION tree from BP into EXPR. */
387 static void
388 unpack_ts_target_option (struct bitpack_d *bp, tree expr)
390 unsigned i, len;
391 struct cl_target_option *t = TREE_TARGET_OPTION (expr);
393 len = sizeof (struct cl_target_option);
394 for (i = 0; i < len; i++)
395 ((unsigned char *)t)[i] = bp_unpack_value (bp, 8);
396 if (bp_unpack_value (bp, 32) != 0x12345678)
397 fatal_error ("cl_target_option size mismatch in LTO reader and writer");
400 /* Unpack a TS_OPTIMIZATION tree from BP into EXPR. */
402 static void
403 unpack_ts_optimization (struct bitpack_d *bp, tree expr)
405 unsigned i, len;
406 struct cl_optimization *t = TREE_OPTIMIZATION (expr);
408 len = sizeof (struct cl_optimization);
409 for (i = 0; i < len; i++)
410 ((unsigned char *)t)[i] = bp_unpack_value (bp, 8);
411 if (bp_unpack_value (bp, 32) != 0x12345678)
412 fatal_error ("cl_optimization size mismatch in LTO reader and writer");
416 /* Unpack all the non-pointer fields in EXPR into a bit pack. */
418 static void
419 unpack_value_fields (struct data_in *data_in, struct bitpack_d *bp, tree expr)
421 enum tree_code code;
423 code = TREE_CODE (expr);
425 /* Note that all these functions are highly sensitive to changes in
426 the types and sizes of each of the fields being packed. */
427 unpack_ts_base_value_fields (bp, expr);
429 if (CODE_CONTAINS_STRUCT (code, TS_INT_CST))
430 unpack_ts_int_cst_value_fields (bp, expr);
432 if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
433 unpack_ts_real_cst_value_fields (bp, expr);
435 if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
436 unpack_ts_fixed_cst_value_fields (bp, expr);
438 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
439 DECL_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
441 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
442 unpack_ts_decl_common_value_fields (bp, expr);
444 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
445 unpack_ts_decl_wrtl_value_fields (bp, expr);
447 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
448 unpack_ts_decl_with_vis_value_fields (bp, expr);
450 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
451 unpack_ts_function_decl_value_fields (bp, expr);
453 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
454 unpack_ts_type_common_value_fields (bp, expr);
456 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
457 SET_EXPR_LOCATION (expr, stream_input_location (bp, data_in));
459 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
460 unpack_ts_block_value_fields (data_in, bp, expr);
462 if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
463 unpack_ts_translation_unit_decl_value_fields (data_in, bp, expr);
465 if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
466 unpack_ts_target_option (bp, expr);
468 if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
469 unpack_ts_optimization (bp, expr);
471 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
473 unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
474 if (length > 0)
475 vec_safe_grow (BINFO_BASE_ACCESSES (expr), length);
478 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
480 unsigned HOST_WIDE_INT length = bp_unpack_var_len_unsigned (bp);
481 if (length > 0)
482 vec_safe_grow (CONSTRUCTOR_ELTS (expr), length);
487 /* Read all the language-independent bitfield values for EXPR from IB.
488 Return the partially unpacked bitpack so the caller can unpack any other
489 bitfield values that the writer may have written. */
491 struct bitpack_d
492 streamer_read_tree_bitfields (struct lto_input_block *ib,
493 struct data_in *data_in, tree expr)
495 enum tree_code code;
496 struct bitpack_d bp;
498 /* Read the bitpack of non-pointer values from IB. */
499 bp = streamer_read_bitpack (ib);
501 /* The first word in BP contains the code of the tree that we
502 are about to read. */
503 code = (enum tree_code) bp_unpack_value (&bp, 16);
504 lto_tag_check (lto_tree_code_to_tag (code),
505 lto_tree_code_to_tag (TREE_CODE (expr)));
507 /* Unpack all the value fields from BP. */
508 unpack_value_fields (data_in, &bp, expr);
510 return bp;
514 /* Materialize a new tree from input block IB using descriptors in
515 DATA_IN. The code for the new tree should match TAG. Store in
516 *IX_P the index into the reader cache where the new tree is stored. */
518 tree
519 streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
520 enum LTO_tags tag)
522 enum tree_code code;
523 tree result;
524 #ifdef LTO_STREAMER_DEBUG
525 HOST_WIDEST_INT orig_address_in_writer;
526 #endif
528 result = NULL_TREE;
530 #ifdef LTO_STREAMER_DEBUG
531 /* Read the word representing the memory address for the tree
532 as it was written by the writer. This is useful when
533 debugging differences between the writer and reader. */
534 orig_address_in_writer = streamer_read_hwi (ib);
535 gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
536 #endif
538 code = lto_tag_to_tree_code (tag);
540 /* We should never see an SSA_NAME tree. Only the version numbers of
541 SSA names are ever written out. See input_ssa_names. */
542 gcc_assert (code != SSA_NAME);
544 /* Instantiate a new tree using the header data. */
545 if (CODE_CONTAINS_STRUCT (code, TS_STRING))
546 result = streamer_read_string_cst (data_in, ib);
547 else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
548 result = input_identifier (data_in, ib);
549 else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
551 HOST_WIDE_INT len = streamer_read_hwi (ib);
552 result = make_tree_vec (len);
554 else if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
556 HOST_WIDE_INT len = streamer_read_hwi (ib);
557 result = make_vector (len);
559 else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
561 unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
562 result = make_tree_binfo (len);
564 else if (code == CALL_EXPR)
566 unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
567 return build_vl_exp (CALL_EXPR, nargs + 3);
569 else
571 /* For all other nodes, materialize the tree with a raw
572 make_node call. */
573 result = make_node (code);
576 #ifdef LTO_STREAMER_DEBUG
577 /* Store the original address of the tree as seen by the writer
578 in RESULT's aux field. This is useful when debugging streaming
579 problems. This way, a debugging session can be started on
580 both writer and reader with a breakpoint using this address
581 value in both. */
582 lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
583 #endif
585 return result;
589 /* Read all pointer fields in the TS_COMMON structure of EXPR from input
590 block IB. DATA_IN contains tables and descriptors for the
591 file being read. */
594 static void
595 lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
596 struct data_in *data_in, tree expr)
598 if (TREE_CODE (expr) != IDENTIFIER_NODE)
599 TREE_TYPE (expr) = stream_read_tree (ib, data_in);
603 /* Read all pointer fields in the TS_VECTOR structure of EXPR from input
604 block IB. DATA_IN contains tables and descriptors for the
605 file being read. */
607 static void
608 lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
609 struct data_in *data_in, tree expr)
611 unsigned i;
612 for (i = 0; i < VECTOR_CST_NELTS (expr); ++i)
613 VECTOR_CST_ELT (expr, i) = stream_read_tree (ib, data_in);
617 /* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
618 block IB. DATA_IN contains tables and descriptors for the
619 file being read. */
621 static void
622 lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
623 struct data_in *data_in, tree expr)
625 TREE_REALPART (expr) = stream_read_tree (ib, data_in);
626 TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
630 /* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
631 from input block IB. DATA_IN contains tables and descriptors for the
632 file being read. */
634 static void
635 lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
636 struct data_in *data_in, tree expr)
638 DECL_NAME (expr) = stream_read_tree (ib, data_in);
639 DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
643 /* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
644 input block IB. DATA_IN contains tables and descriptors for the
645 file being read. */
647 static void
648 lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
649 struct data_in *data_in, tree expr)
651 DECL_SIZE (expr) = stream_read_tree (ib, data_in);
652 DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
653 DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
655 /* Do not stream DECL_ABSTRACT_ORIGIN. We cannot handle debug information
656 for early inlining so drop it on the floor instead of ICEing in
657 dwarf2out.c. */
659 if ((TREE_CODE (expr) == VAR_DECL
660 || TREE_CODE (expr) == PARM_DECL)
661 && DECL_HAS_VALUE_EXPR_P (expr))
662 SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
664 if (TREE_CODE (expr) == VAR_DECL)
666 tree dexpr = stream_read_tree (ib, data_in);
667 if (dexpr)
668 SET_DECL_DEBUG_EXPR (expr, dexpr);
673 /* Read all pointer fields in the TS_DECL_NON_COMMON structure of
674 EXPR from input block IB. DATA_IN contains tables and descriptors for the
675 file being read. */
677 static void
678 lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
679 struct data_in *data_in, tree expr)
681 if (TREE_CODE (expr) == FUNCTION_DECL)
683 DECL_ARGUMENTS (expr) = streamer_read_chain (ib, data_in);
684 DECL_RESULT (expr) = stream_read_tree (ib, data_in);
686 else if (TREE_CODE (expr) == TYPE_DECL)
687 DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
688 DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
692 /* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
693 from input block IB. DATA_IN contains tables and descriptors for the
694 file being read. */
696 static void
697 lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
698 struct data_in *data_in, tree expr)
700 tree id;
702 id = stream_read_tree (ib, data_in);
703 if (id)
705 gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
706 SET_DECL_ASSEMBLER_NAME (expr, id);
709 DECL_SECTION_NAME (expr) = stream_read_tree (ib, data_in);
710 DECL_COMDAT_GROUP (expr) = stream_read_tree (ib, data_in);
714 /* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
715 input block IB. DATA_IN contains tables and descriptors for the
716 file being read. */
718 static void
719 lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
720 struct data_in *data_in, tree expr)
722 DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
723 DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
724 DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
725 DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
726 DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
730 /* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
731 from input block IB. DATA_IN contains tables and descriptors for the
732 file being read. */
734 static void
735 lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
736 struct data_in *data_in, tree expr)
738 /* DECL_STRUCT_FUNCTION is handled by lto_input_function. FIXME lto,
739 maybe it should be handled here? */
740 DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
741 DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree (ib, data_in);
742 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
744 /* If the file contains a function with an EH personality set,
745 then it was compiled with -fexceptions. In that case, initialize
746 the backend EH machinery. */
747 if (DECL_FUNCTION_PERSONALITY (expr))
748 lto_init_eh ();
752 /* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
753 input block IB. DATA_IN contains tables and descriptors for the file
754 being read. */
756 static void
757 lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
758 struct data_in *data_in, tree expr)
760 TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
761 TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
762 TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
763 TYPE_NAME (expr) = stream_read_tree (ib, data_in);
764 /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO. They will be
765 reconstructed during fixup. */
766 /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
767 during fixup. */
768 TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
769 TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
770 /* TYPE_CANONICAL gets re-computed during type merging. */
771 TYPE_CANONICAL (expr) = NULL_TREE;
772 TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
775 /* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
776 from input block IB. DATA_IN contains tables and descriptors for the
777 file being read. */
779 static void
780 lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
781 struct data_in *data_in,
782 tree expr)
784 if (TREE_CODE (expr) == ENUMERAL_TYPE)
785 TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
786 else if (TREE_CODE (expr) == ARRAY_TYPE)
787 TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
788 else if (RECORD_OR_UNION_TYPE_P (expr))
789 TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
790 else if (TREE_CODE (expr) == FUNCTION_TYPE
791 || TREE_CODE (expr) == METHOD_TYPE)
792 TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
794 if (!POINTER_TYPE_P (expr))
795 TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
796 TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
797 if (RECORD_OR_UNION_TYPE_P (expr))
798 TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
802 /* Read all pointer fields in the TS_LIST structure of EXPR from input
803 block IB. DATA_IN contains tables and descriptors for the
804 file being read. */
806 static void
807 lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
808 struct data_in *data_in, tree expr)
810 TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
811 TREE_VALUE (expr) = stream_read_tree (ib, data_in);
812 TREE_CHAIN (expr) = stream_read_tree (ib, data_in);
816 /* Read all pointer fields in the TS_VEC structure of EXPR from input
817 block IB. DATA_IN contains tables and descriptors for the
818 file being read. */
820 static void
821 lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
822 struct data_in *data_in, tree expr)
824 int i;
826 /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
827 instantiate EXPR. */
828 for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
829 TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
833 /* Read all pointer fields in the TS_EXP structure of EXPR from input
834 block IB. DATA_IN contains tables and descriptors for the
835 file being read. */
838 static void
839 lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
840 struct data_in *data_in, tree expr)
842 int i;
844 for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
845 TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
847 TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
851 /* Read all pointer fields in the TS_BLOCK structure of EXPR from input
852 block IB. DATA_IN contains tables and descriptors for the
853 file being read. */
855 static void
856 lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
857 struct data_in *data_in, tree expr)
859 BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
861 BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
863 /* Stream BLOCK_ABSTRACT_ORIGIN and BLOCK_SOURCE_LOCATION for
864 the limited cases we can handle - those that represent inlined
865 function scopes. For the rest them on the floor instead of ICEing in
866 dwarf2out.c. */
867 BLOCK_ABSTRACT_ORIGIN (expr) = stream_read_tree (ib, data_in);
868 /* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information
869 for early inlined BLOCKs so drop it on the floor instead of ICEing in
870 dwarf2out.c. */
872 /* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
873 streaming time. */
875 /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
876 of streaming it. For non-BLOCK BLOCK_SUPERCONTEXTs we still
877 stream the child relationship explicitly. */
878 if (BLOCK_SUPERCONTEXT (expr)
879 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
881 BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
882 BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
885 /* The global block is rooted at the TU decl. Hook it here to
886 avoid the need to stream in this block during WPA time. */
887 else if (BLOCK_SUPERCONTEXT (expr)
888 && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
889 DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
891 /* The function-level block is connected at the time we read in
892 function bodies for the same reason. */
896 /* Read all pointer fields in the TS_BINFO structure of EXPR from input
897 block IB. DATA_IN contains tables and descriptors for the
898 file being read. */
900 static void
901 lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
902 struct data_in *data_in, tree expr)
904 unsigned i;
905 tree t;
907 /* Note that the number of slots in EXPR was read in
908 streamer_alloc_tree when instantiating EXPR. However, the
909 vector is empty so we cannot rely on vec::length to know how many
910 elements to read. So, this list is emitted as a 0-terminated
911 list on the writer side. */
914 t = stream_read_tree (ib, data_in);
915 if (t)
916 BINFO_BASE_BINFOS (expr)->quick_push (t);
918 while (t);
920 BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
921 BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
922 BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
924 /* The vector of BINFO_BASE_ACCESSES is pre-allocated during
925 unpacking the bitfield section. */
926 for (i = 0; i < vec_safe_length (BINFO_BASE_ACCESSES (expr)); i++)
928 tree a = stream_read_tree (ib, data_in);
929 (*BINFO_BASE_ACCESSES (expr))[i] = a;
932 BINFO_INHERITANCE_CHAIN (expr) = stream_read_tree (ib, data_in);
933 BINFO_SUBVTT_INDEX (expr) = stream_read_tree (ib, data_in);
934 BINFO_VPTR_INDEX (expr) = stream_read_tree (ib, data_in);
938 /* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
939 input block IB. DATA_IN contains tables and descriptors for the
940 file being read. */
942 static void
943 lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
944 struct data_in *data_in, tree expr)
946 unsigned i;
948 for (i = 0; i < CONSTRUCTOR_NELTS (expr); i++)
950 constructor_elt e;
951 e.index = stream_read_tree (ib, data_in);
952 e.value = stream_read_tree (ib, data_in);
953 (*CONSTRUCTOR_ELTS (expr))[i] = e;
958 /* Read all pointer fields in EXPR from input block IB. DATA_IN
959 contains tables and descriptors for the file being read. */
961 void
962 streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
963 tree expr)
965 enum tree_code code;
967 code = TREE_CODE (expr);
969 if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
970 lto_input_ts_common_tree_pointers (ib, data_in, expr);
972 if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
973 lto_input_ts_vector_tree_pointers (ib, data_in, expr);
975 if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
976 lto_input_ts_complex_tree_pointers (ib, data_in, expr);
978 if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
979 lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
981 if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
982 lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
984 if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
985 lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
987 if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
988 lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
990 if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
991 lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
993 if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
994 lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
996 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
997 lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
999 if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
1000 lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
1002 if (CODE_CONTAINS_STRUCT (code, TS_LIST))
1003 lto_input_ts_list_tree_pointers (ib, data_in, expr);
1005 if (CODE_CONTAINS_STRUCT (code, TS_VEC))
1006 lto_input_ts_vec_tree_pointers (ib, data_in, expr);
1008 if (CODE_CONTAINS_STRUCT (code, TS_EXP))
1009 lto_input_ts_exp_tree_pointers (ib, data_in, expr);
1011 if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
1012 lto_input_ts_block_tree_pointers (ib, data_in, expr);
1014 if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
1015 lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
1017 if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
1018 lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
1022 /* Read an index IX from input block IB and return the tree node at
1023 DATA_IN->FILE_DATA->GLOBALS_INDEX[IX]. */
1025 tree
1026 streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1028 unsigned HOST_WIDE_INT ix;
1029 tree result;
1030 enum LTO_tags expected_tag;
1032 ix = streamer_read_uhwi (ib);
1033 expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1035 result = streamer_tree_cache_get_tree (data_in->reader_cache, ix);
1036 gcc_assert (result
1037 && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1039 return result;
1043 /* Read a code and class from input block IB and return the
1044 corresponding builtin. DATA_IN is as in stream_read_tree. */
1046 tree
1047 streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1049 enum built_in_class fclass;
1050 enum built_in_function fcode;
1051 const char *asmname;
1052 tree result;
1054 fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1055 gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1057 fcode = (enum built_in_function) streamer_read_uhwi (ib);
1059 if (fclass == BUILT_IN_NORMAL)
1061 if (fcode >= END_BUILTINS)
1062 fatal_error ("machine independent builtin code out of range");
1063 result = builtin_decl_explicit (fcode);
1064 gcc_assert (result);
1066 else if (fclass == BUILT_IN_MD)
1068 result = targetm.builtin_decl (fcode, true);
1069 if (!result || result == error_mark_node)
1070 fatal_error ("target specific builtin not available");
1072 else
1073 gcc_unreachable ();
1075 asmname = streamer_read_string (data_in, ib);
1076 if (asmname)
1077 set_builtin_user_assembler_name (result, asmname);
1079 streamer_tree_cache_append (data_in->reader_cache, result, 0);
1081 return result;