1 /* Output variables, constants and external declarations, for GNU compiler.
2 Copyright (C) 1987-2014 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
21 /* This file handles generation of all the assembler code
22 *except* the instructions of a function.
23 This includes declarations of variables and their initial values.
25 We also output the assembler code for constants stored in memory
26 and are responsible for combining constants with the same value. */
30 #include "coretypes.h"
34 #include "stor-layout.h"
35 #include "stringpool.h"
36 #include "gcc-symtab.h"
41 #include "hard-reg-set.h"
44 #include "diagnostic-core.h"
47 #include "langhooks.h"
51 #include "common/common-target.h"
52 #include "targhooks.h"
54 #include "pointer-set.h"
56 #include "basic-block.h"
58 #ifdef XCOFF_DEBUGGING_INFO
59 #include "xcoffout.h" /* Needed for external data
60 declarations for e.g. AIX 4.x. */
63 /* The (assembler) name of the first globally-visible object output. */
64 extern GTY(()) const char *first_global_object_name
;
65 extern GTY(()) const char *weak_global_object_name
;
67 const char *first_global_object_name
;
68 const char *weak_global_object_name
;
71 struct constant_descriptor_rtx
;
72 struct rtx_constant_pool
;
74 #define n_deferred_constants (crtl->varasm.deferred_constants)
76 /* Number for making the label on the next
77 constant that is stored in memory. */
79 static GTY(()) int const_labelno
;
81 /* Carry information from ASM_DECLARE_OBJECT_NAME
82 to ASM_FINISH_DECLARE_OBJECT. */
84 int size_directive_output
;
86 /* The last decl for which assemble_variable was called,
87 if it did ASM_DECLARE_OBJECT_NAME.
88 If the last call to assemble_variable didn't do that,
91 tree last_assemble_variable_decl
;
93 /* The following global variable indicates if the first basic block
94 in a function belongs to the cold partition or not. */
96 bool first_function_block_is_cold
;
98 /* We give all constants their own alias set. Perhaps redundant with
99 MEM_READONLY_P, but pre-dates it. */
101 static alias_set_type const_alias_set
;
103 /* Whether we saw any functions with no_split_stack. */
105 static bool saw_no_split_stack
;
107 static const char *strip_reg_name (const char *);
108 static int contains_pointers_p (tree
);
109 #ifdef ASM_OUTPUT_EXTERNAL
110 static bool incorporeal_function_p (tree
);
112 static void decode_addr_const (tree
, struct addr_const
*);
113 static hashval_t
const_desc_hash (const void *);
114 static int const_desc_eq (const void *, const void *);
115 static hashval_t
const_hash_1 (const tree
);
116 static int compare_constant (const tree
, const tree
);
117 static tree
copy_constant (tree
);
118 static void output_constant_def_contents (rtx
);
119 static void output_addressed_constants (tree
);
120 static unsigned HOST_WIDE_INT
output_constant (tree
, unsigned HOST_WIDE_INT
,
122 static void globalize_decl (tree
);
123 static bool decl_readonly_section_1 (enum section_category
);
124 #ifdef BSS_SECTION_ASM_OP
125 #ifdef ASM_OUTPUT_ALIGNED_BSS
126 static void asm_output_aligned_bss (FILE *, tree
, const char *,
127 unsigned HOST_WIDE_INT
, int)
130 #endif /* BSS_SECTION_ASM_OP */
131 static void mark_weak (tree
);
132 static void output_constant_pool (const char *, tree
);
134 /* Well-known sections, each one associated with some sort of *_ASM_OP. */
135 section
*text_section
;
136 section
*data_section
;
137 section
*readonly_data_section
;
138 section
*sdata_section
;
139 section
*ctors_section
;
140 section
*dtors_section
;
141 section
*bss_section
;
142 section
*sbss_section
;
144 /* Various forms of common section. All are guaranteed to be nonnull. */
145 section
*tls_comm_section
;
146 section
*comm_section
;
147 section
*lcomm_section
;
149 /* A SECTION_NOSWITCH section used for declaring global BSS variables.
151 section
*bss_noswitch_section
;
153 /* The section that holds the main exception table, when known. The section
154 is set either by the target's init_sections hook or by the first call to
155 switch_to_exception_section. */
156 section
*exception_section
;
158 /* The section that holds the DWARF2 frame unwind information, when known.
159 The section is set either by the target's init_sections hook or by the
160 first call to switch_to_eh_frame_section. */
161 section
*eh_frame_section
;
163 /* asm_out_file's current section. This is NULL if no section has yet
164 been selected or if we lose track of what the current section is. */
167 /* True if code for the current function is currently being directed
168 at the cold section. */
169 bool in_cold_section_p
;
171 /* A linked list of all the unnamed sections. */
172 static GTY(()) section
*unnamed_sections
;
174 /* Return a nonzero value if DECL has a section attribute. */
175 #define IN_NAMED_SECTION(DECL) \
176 ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \
177 && DECL_SECTION_NAME (DECL) != NULL_TREE)
179 /* Hash table of named sections. */
180 static GTY((param_is (section
))) htab_t section_htab
;
182 /* A table of object_blocks, indexed by section. */
183 static GTY((param_is (struct object_block
))) htab_t object_block_htab
;
185 /* The next number to use for internal anchor labels. */
186 static GTY(()) int anchor_labelno
;
188 /* A pool of constants that can be shared between functions. */
189 static GTY(()) struct rtx_constant_pool
*shared_constant_pool
;
191 /* Helper routines for maintaining section_htab. */
194 section_entry_eq (const void *p1
, const void *p2
)
196 const section
*old
= (const section
*) p1
;
197 const char *new_name
= (const char *) p2
;
199 return strcmp (old
->named
.name
, new_name
) == 0;
203 section_entry_hash (const void *p
)
205 const section
*old
= (const section
*) p
;
206 return htab_hash_string (old
->named
.name
);
209 /* Return a hash value for section SECT. */
212 hash_section (section
*sect
)
214 if (sect
->common
.flags
& SECTION_NAMED
)
215 return htab_hash_string (sect
->named
.name
);
216 return sect
->common
.flags
;
219 /* Helper routines for maintaining object_block_htab. */
222 object_block_entry_eq (const void *p1
, const void *p2
)
224 const struct object_block
*old
= (const struct object_block
*) p1
;
225 const section
*new_section
= (const section
*) p2
;
227 return old
->sect
== new_section
;
231 object_block_entry_hash (const void *p
)
233 const struct object_block
*old
= (const struct object_block
*) p
;
234 return hash_section (old
->sect
);
237 /* Return a new unnamed section with the given fields. */
240 get_unnamed_section (unsigned int flags
, void (*callback
) (const void *),
245 sect
= ggc_alloc
<section
> ();
246 sect
->unnamed
.common
.flags
= flags
| SECTION_UNNAMED
;
247 sect
->unnamed
.callback
= callback
;
248 sect
->unnamed
.data
= data
;
249 sect
->unnamed
.next
= unnamed_sections
;
251 unnamed_sections
= sect
;
255 /* Return a SECTION_NOSWITCH section with the given fields. */
258 get_noswitch_section (unsigned int flags
, noswitch_section_callback callback
)
262 sect
= ggc_alloc
<section
> ();
263 sect
->noswitch
.common
.flags
= flags
| SECTION_NOSWITCH
;
264 sect
->noswitch
.callback
= callback
;
269 /* Return the named section structure associated with NAME. Create
270 a new section with the given fields if no such structure exists. */
273 get_section (const char *name
, unsigned int flags
, tree decl
)
275 section
*sect
, **slot
;
278 htab_find_slot_with_hash (section_htab
, name
,
279 htab_hash_string (name
), INSERT
);
280 flags
|= SECTION_NAMED
;
283 sect
= ggc_alloc
<section
> ();
284 sect
->named
.common
.flags
= flags
;
285 sect
->named
.name
= ggc_strdup (name
);
286 sect
->named
.decl
= decl
;
292 if ((sect
->common
.flags
& ~SECTION_DECLARED
) != flags
293 && ((sect
->common
.flags
| flags
) & SECTION_OVERRIDE
) == 0)
295 /* It is fine if one of the section flags is
296 SECTION_WRITE | SECTION_RELRO and the other has none of these
297 flags (i.e. read-only) in named sections and either the
298 section hasn't been declared yet or has been declared as writable.
299 In that case just make sure the resulting flags are
300 SECTION_WRITE | SECTION_RELRO, ie. writable only because of
302 if (((sect
->common
.flags
^ flags
) & (SECTION_WRITE
| SECTION_RELRO
))
303 == (SECTION_WRITE
| SECTION_RELRO
)
304 && (sect
->common
.flags
305 & ~(SECTION_DECLARED
| SECTION_WRITE
| SECTION_RELRO
))
306 == (flags
& ~(SECTION_WRITE
| SECTION_RELRO
))
307 && ((sect
->common
.flags
& SECTION_DECLARED
) == 0
308 || (sect
->common
.flags
& SECTION_WRITE
)))
310 sect
->common
.flags
|= (SECTION_WRITE
| SECTION_RELRO
);
313 /* Sanity check user variables for flag changes. */
314 if (sect
->named
.decl
!= NULL
315 && DECL_P (sect
->named
.decl
)
316 && decl
!= sect
->named
.decl
)
318 if (decl
!= NULL
&& DECL_P (decl
))
319 error ("%+D causes a section type conflict with %D",
320 decl
, sect
->named
.decl
);
322 error ("section type conflict with %D", sect
->named
.decl
);
323 inform (DECL_SOURCE_LOCATION (sect
->named
.decl
),
324 "%qD was declared here", sect
->named
.decl
);
326 else if (decl
!= NULL
&& DECL_P (decl
))
327 error ("%+D causes a section type conflict", decl
);
329 error ("section type conflict");
330 /* Make sure we don't error about one section multiple times. */
331 sect
->common
.flags
|= SECTION_OVERRIDE
;
337 /* Return true if the current compilation mode benefits from having
338 objects grouped into blocks. */
341 use_object_blocks_p (void)
343 return flag_section_anchors
;
346 /* Return the object_block structure for section SECT. Create a new
347 structure if we haven't created one already. Return null if SECT
350 static struct object_block
*
351 get_block_for_section (section
*sect
)
353 struct object_block
*block
;
359 slot
= htab_find_slot_with_hash (object_block_htab
, sect
,
360 hash_section (sect
), INSERT
);
361 block
= (struct object_block
*) *slot
;
364 block
= ggc_cleared_alloc
<object_block
> ();
371 /* Create a symbol with label LABEL and place it at byte offset
372 OFFSET in BLOCK. OFFSET can be negative if the symbol's offset
373 is not yet known. LABEL must be a garbage-collected string. */
376 create_block_symbol (const char *label
, struct object_block
*block
,
377 HOST_WIDE_INT offset
)
382 /* Create the extended SYMBOL_REF. */
383 size
= RTX_HDR_SIZE
+ sizeof (struct block_symbol
);
384 symbol
= (rtx
) ggc_internal_alloc (size
);
386 /* Initialize the normal SYMBOL_REF fields. */
387 memset (symbol
, 0, size
);
388 PUT_CODE (symbol
, SYMBOL_REF
);
389 PUT_MODE (symbol
, Pmode
);
390 XSTR (symbol
, 0) = label
;
391 SYMBOL_REF_FLAGS (symbol
) = SYMBOL_FLAG_HAS_BLOCK_INFO
;
393 /* Initialize the block_symbol stuff. */
394 SYMBOL_REF_BLOCK (symbol
) = block
;
395 SYMBOL_REF_BLOCK_OFFSET (symbol
) = offset
;
400 /* Return a section with a particular name and with whatever SECTION_*
401 flags section_type_flags deems appropriate. The name of the section
402 is taken from NAME if nonnull, otherwise it is taken from DECL's
403 DECL_SECTION_NAME. DECL is the decl associated with the section
404 (see the section comment for details) and RELOC is as for
405 section_type_flags. */
408 get_named_section (tree decl
, const char *name
, int reloc
)
414 gcc_assert (decl
&& DECL_P (decl
) && DECL_SECTION_NAME (decl
));
415 name
= TREE_STRING_POINTER (DECL_SECTION_NAME (decl
));
418 flags
= targetm
.section_type_flags (decl
, name
, reloc
);
419 return get_section (name
, flags
, decl
);
422 /* If required, set DECL_SECTION_NAME to a unique name. */
425 resolve_unique_section (tree decl
, int reloc ATTRIBUTE_UNUSED
,
426 int flag_function_or_data_sections
)
428 if (DECL_SECTION_NAME (decl
) == NULL_TREE
429 && targetm_common
.have_named_sections
430 && (flag_function_or_data_sections
431 || DECL_COMDAT_GROUP (decl
)))
433 targetm
.asm_out
.unique_section (decl
, reloc
);
434 DECL_HAS_IMPLICIT_SECTION_NAME_P (decl
) = true;
438 #ifdef BSS_SECTION_ASM_OP
440 #ifdef ASM_OUTPUT_ALIGNED_BSS
442 /* Utility function for targets to use in implementing
443 ASM_OUTPUT_ALIGNED_BSS.
444 ??? It is believed that this function will work in most cases so such
445 support is localized here. */
448 asm_output_aligned_bss (FILE *file
, tree decl ATTRIBUTE_UNUSED
,
449 const char *name
, unsigned HOST_WIDE_INT size
,
452 switch_to_section (bss_section
);
453 ASM_OUTPUT_ALIGN (file
, floor_log2 (align
/ BITS_PER_UNIT
));
454 #ifdef ASM_DECLARE_OBJECT_NAME
455 last_assemble_variable_decl
= decl
;
456 ASM_DECLARE_OBJECT_NAME (file
, name
, decl
);
458 /* Standard thing is just output label for the object. */
459 ASM_OUTPUT_LABEL (file
, name
);
460 #endif /* ASM_DECLARE_OBJECT_NAME */
461 ASM_OUTPUT_SKIP (file
, size
? size
: 1);
466 #endif /* BSS_SECTION_ASM_OP */
468 #ifndef USE_SELECT_SECTION_FOR_FUNCTIONS
469 /* Return the hot section for function DECL. Return text_section for
473 hot_function_section (tree decl
)
475 if (decl
!= NULL_TREE
476 && DECL_SECTION_NAME (decl
) != NULL_TREE
477 && targetm_common
.have_named_sections
)
478 return get_named_section (decl
, NULL
, 0);
484 /* Return section for TEXT_SECTION_NAME if DECL or DECL_SECTION_NAME (DECL)
487 When DECL_SECTION_NAME is non-NULL and it is implicit section and
488 NAMED_SECTION_SUFFIX is non-NULL, then produce section called
489 concatenate the name with NAMED_SECTION_SUFFIX.
490 Otherwise produce "TEXT_SECTION_NAME.IMPLICIT_NAME". */
493 get_named_text_section (tree decl
,
494 const char *text_section_name
,
495 const char *named_section_suffix
)
497 if (decl
&& DECL_SECTION_NAME (decl
))
499 if (named_section_suffix
)
501 tree dsn
= DECL_SECTION_NAME (decl
);
502 const char *stripped_name
;
505 name
= (char *) alloca (TREE_STRING_LENGTH (dsn
) + 1);
506 memcpy (name
, TREE_STRING_POINTER (dsn
),
507 TREE_STRING_LENGTH (dsn
) + 1);
509 stripped_name
= targetm
.strip_name_encoding (name
);
511 buffer
= ACONCAT ((stripped_name
, named_section_suffix
, NULL
));
512 return get_named_section (decl
, buffer
, 0);
514 else if (DECL_HAS_IMPLICIT_SECTION_NAME_P (decl
))
518 /* Do not try to split gnu_linkonce functions. This gets somewhat
520 if (DECL_COMDAT_GROUP (decl
) && !HAVE_COMDAT_GROUP
)
522 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
523 name
= targetm
.strip_name_encoding (name
);
524 return get_named_section (decl
, ACONCAT ((text_section_name
, ".",
530 return get_named_section (decl
, text_section_name
, 0);
533 /* Choose named function section based on its frequency. */
536 default_function_section (tree decl
, enum node_frequency freq
,
537 bool startup
, bool exit
)
539 #if defined HAVE_LD_EH_GC_SECTIONS && defined HAVE_LD_EH_GC_SECTIONS_BUG
540 /* Old GNU linkers have buggy --gc-section support, which sometimes
541 results in .gcc_except_table* sections being garbage collected. */
543 && DECL_SECTION_NAME (decl
)
544 && DECL_HAS_IMPLICIT_SECTION_NAME_P (decl
))
548 if (!flag_reorder_functions
549 || !targetm_common
.have_named_sections
)
551 /* Startup code should go to startup subsection unless it is
552 unlikely executed (this happens especially with function splitting
553 where we can split away unnecessary parts of static constructors. */
554 if (startup
&& freq
!= NODE_FREQUENCY_UNLIKELY_EXECUTED
)
556 /* If we do have a profile or(and) LTO phase is executed, we do not need
557 these ELF section. */
558 if (!in_lto_p
|| !flag_profile_values
)
559 return get_named_text_section (decl
, ".text.startup", NULL
);
564 /* Similarly for exit. */
565 if (exit
&& freq
!= NODE_FREQUENCY_UNLIKELY_EXECUTED
)
566 return get_named_text_section (decl
, ".text.exit", NULL
);
568 /* Group cold functions together, similarly for hot code. */
571 case NODE_FREQUENCY_UNLIKELY_EXECUTED
:
572 return get_named_text_section (decl
, ".text.unlikely", NULL
);
573 case NODE_FREQUENCY_HOT
:
574 /* If we do have a profile or(and) LTO phase is executed, we do not need
575 these ELF section. */
576 if (!in_lto_p
|| !flag_profile_values
)
577 return get_named_text_section (decl
, ".text.hot", NULL
);
583 /* Return the section for function DECL.
585 If DECL is NULL_TREE, return the text section. We can be passed
586 NULL_TREE under some circumstances by dbxout.c at least.
588 If FORCE_COLD is true, return cold function section ignoring
589 the frequency info of cgraph_node. */
592 function_section_1 (tree decl
, bool force_cold
)
594 section
*section
= NULL
;
595 enum node_frequency freq
= NODE_FREQUENCY_NORMAL
;
596 bool startup
= false, exit
= false;
600 struct cgraph_node
*node
= cgraph_get_node (decl
);
604 freq
= node
->frequency
;
605 startup
= node
->only_called_at_startup
;
606 exit
= node
->only_called_at_exit
;
610 freq
= NODE_FREQUENCY_UNLIKELY_EXECUTED
;
612 #ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
613 if (decl
!= NULL_TREE
614 && DECL_SECTION_NAME (decl
) != NULL_TREE
)
616 if (targetm
.asm_out
.function_section
)
617 section
= targetm
.asm_out
.function_section (decl
, freq
,
621 return get_named_section (decl
, NULL
, 0);
624 return targetm
.asm_out
.select_section
625 (decl
, freq
== NODE_FREQUENCY_UNLIKELY_EXECUTED
,
628 if (targetm
.asm_out
.function_section
)
629 section
= targetm
.asm_out
.function_section (decl
, freq
, startup
, exit
);
632 return hot_function_section (decl
);
636 /* Return the section for function DECL.
638 If DECL is NULL_TREE, return the text section. We can be passed
639 NULL_TREE under some circumstances by dbxout.c at least. */
642 function_section (tree decl
)
644 /* Handle cases where function splitting code decides
645 to put function entry point into unlikely executed section
646 despite the fact that the function itself is not cold
647 (i.e. it is called rarely but contains a hot loop that is
648 better to live in hot subsection for the code locality). */
649 return function_section_1 (decl
,
650 first_function_block_is_cold
);
653 /* Return the section for the current function, take IN_COLD_SECTION_P
657 current_function_section (void)
659 return function_section_1 (current_function_decl
, in_cold_section_p
);
662 /* Tell assembler to switch to unlikely-to-be-executed text section. */
665 unlikely_text_section (void)
667 return function_section_1 (current_function_decl
, true);
670 /* When called within a function context, return true if the function
671 has been assigned a cold text section and if SECT is that section.
672 When called outside a function context, return true if SECT is the
673 default cold section. */
676 unlikely_text_section_p (section
*sect
)
678 return sect
== function_section_1 (current_function_decl
, true);
681 /* Return the read-only data section associated with function DECL. */
684 default_function_rodata_section (tree decl
)
686 if (decl
!= NULL_TREE
&& DECL_SECTION_NAME (decl
))
688 const char *name
= TREE_STRING_POINTER (DECL_SECTION_NAME (decl
));
690 if (DECL_COMDAT_GROUP (decl
) && HAVE_COMDAT_GROUP
)
696 dot
= strchr (name
+ 1, '.');
699 len
= strlen (dot
) + 8;
700 rname
= (char *) alloca (len
);
702 strcpy (rname
, ".rodata");
704 return get_section (rname
, SECTION_LINKONCE
, decl
);
706 /* For .gnu.linkonce.t.foo we want to use .gnu.linkonce.r.foo. */
707 else if (DECL_COMDAT_GROUP (decl
)
708 && strncmp (name
, ".gnu.linkonce.t.", 16) == 0)
710 size_t len
= strlen (name
) + 1;
711 char *rname
= (char *) alloca (len
);
713 memcpy (rname
, name
, len
);
715 return get_section (rname
, SECTION_LINKONCE
, decl
);
717 /* For .text.foo we want to use .rodata.foo. */
718 else if (flag_function_sections
&& flag_data_sections
719 && strncmp (name
, ".text.", 6) == 0)
721 size_t len
= strlen (name
) + 1;
722 char *rname
= (char *) alloca (len
+ 2);
724 memcpy (rname
, ".rodata", 7);
725 memcpy (rname
+ 7, name
+ 5, len
- 5);
726 return get_section (rname
, 0, decl
);
730 return readonly_data_section
;
733 /* Return the read-only data section associated with function DECL
734 for targets where that section should be always the single
735 readonly data section. */
738 default_no_function_rodata_section (tree decl ATTRIBUTE_UNUSED
)
740 return readonly_data_section
;
743 /* Return the section to use for string merging. */
746 mergeable_string_section (tree decl ATTRIBUTE_UNUSED
,
747 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
,
748 unsigned int flags ATTRIBUTE_UNUSED
)
752 if (HAVE_GAS_SHF_MERGE
&& flag_merge_constants
753 && TREE_CODE (decl
) == STRING_CST
754 && TREE_CODE (TREE_TYPE (decl
)) == ARRAY_TYPE
756 && (len
= int_size_in_bytes (TREE_TYPE (decl
))) > 0
757 && TREE_STRING_LENGTH (decl
) >= len
)
759 enum machine_mode mode
;
760 unsigned int modesize
;
764 const char *prefix
= targetm
.asm_out
.mergeable_rodata_prefix
;
765 char *name
= (char *) alloca (strlen (prefix
) + 30);
767 mode
= TYPE_MODE (TREE_TYPE (TREE_TYPE (decl
)));
768 modesize
= GET_MODE_BITSIZE (mode
);
769 if (modesize
>= 8 && modesize
<= 256
770 && (modesize
& (modesize
- 1)) == 0)
772 if (align
< modesize
)
775 str
= TREE_STRING_POINTER (decl
);
776 unit
= GET_MODE_SIZE (mode
);
778 /* Check for embedded NUL characters. */
779 for (i
= 0; i
< len
; i
+= unit
)
781 for (j
= 0; j
< unit
; j
++)
782 if (str
[i
+ j
] != '\0')
789 sprintf (name
, "%s.str%d.%d", prefix
,
790 modesize
/ 8, (int) (align
/ 8));
791 flags
|= (modesize
/ 8) | SECTION_MERGE
| SECTION_STRINGS
;
792 return get_section (name
, flags
, NULL
);
797 return readonly_data_section
;
800 /* Return the section to use for constant merging. */
803 mergeable_constant_section (enum machine_mode mode ATTRIBUTE_UNUSED
,
804 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
,
805 unsigned int flags ATTRIBUTE_UNUSED
)
807 unsigned int modesize
= GET_MODE_BITSIZE (mode
);
809 if (HAVE_GAS_SHF_MERGE
&& flag_merge_constants
815 && (align
& (align
- 1)) == 0)
817 const char *prefix
= targetm
.asm_out
.mergeable_rodata_prefix
;
818 char *name
= (char *) alloca (strlen (prefix
) + 30);
820 sprintf (name
, "%s.cst%d", prefix
, (int) (align
/ 8));
821 flags
|= (align
/ 8) | SECTION_MERGE
;
822 return get_section (name
, flags
, NULL
);
824 return readonly_data_section
;
827 /* Given NAME, a putative register name, discard any customary prefixes. */
830 strip_reg_name (const char *name
)
832 #ifdef REGISTER_PREFIX
833 if (!strncmp (name
, REGISTER_PREFIX
, strlen (REGISTER_PREFIX
)))
834 name
+= strlen (REGISTER_PREFIX
);
836 if (name
[0] == '%' || name
[0] == '#')
841 /* The user has asked for a DECL to have a particular name. Set (or
842 change) it in such a way that we don't prefix an underscore to
845 set_user_assembler_name (tree decl
, const char *name
)
847 char *starred
= (char *) alloca (strlen (name
) + 2);
849 strcpy (starred
+ 1, name
);
850 change_decl_assembler_name (decl
, get_identifier (starred
));
851 SET_DECL_RTL (decl
, NULL_RTX
);
854 /* Decode an `asm' spec for a declaration as a register name.
855 Return the register number, or -1 if nothing specified,
856 or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
857 or -3 if ASMSPEC is `cc' and is not recognized,
858 or -4 if ASMSPEC is `memory' and is not recognized.
859 Accept an exact spelling or a decimal number.
860 Prefixes such as % are optional. */
863 decode_reg_name_and_count (const char *asmspec
, int *pnregs
)
865 /* Presume just one register is clobbered. */
872 /* Get rid of confusing prefixes. */
873 asmspec
= strip_reg_name (asmspec
);
875 /* Allow a decimal number as a "register name". */
876 for (i
= strlen (asmspec
) - 1; i
>= 0; i
--)
877 if (! ISDIGIT (asmspec
[i
]))
879 if (asmspec
[0] != 0 && i
< 0)
882 if (i
< FIRST_PSEUDO_REGISTER
&& i
>= 0)
888 for (i
= 0; i
< FIRST_PSEUDO_REGISTER
; i
++)
890 && ! strcmp (asmspec
, strip_reg_name (reg_names
[i
])))
893 #ifdef OVERLAPPING_REGISTER_NAMES
897 const char *const name
;
900 } table
[] = OVERLAPPING_REGISTER_NAMES
;
902 for (i
= 0; i
< (int) ARRAY_SIZE (table
); i
++)
904 && ! strcmp (asmspec
, table
[i
].name
))
906 *pnregs
= table
[i
].nregs
;
907 return table
[i
].number
;
910 #endif /* OVERLAPPING_REGISTER_NAMES */
912 #ifdef ADDITIONAL_REGISTER_NAMES
914 static const struct { const char *const name
; const int number
; } table
[]
915 = ADDITIONAL_REGISTER_NAMES
;
917 for (i
= 0; i
< (int) ARRAY_SIZE (table
); i
++)
919 && ! strcmp (asmspec
, table
[i
].name
))
920 return table
[i
].number
;
922 #endif /* ADDITIONAL_REGISTER_NAMES */
924 if (!strcmp (asmspec
, "memory"))
927 if (!strcmp (asmspec
, "cc"))
937 decode_reg_name (const char *name
)
940 return decode_reg_name_and_count (name
, &count
);
944 /* Return true if DECL's initializer is suitable for a BSS section. */
947 bss_initializer_p (const_tree decl
)
949 return (DECL_INITIAL (decl
) == NULL
950 || DECL_INITIAL (decl
) == error_mark_node
951 || (flag_zero_initialized_in_bss
952 /* Leave constant zeroes in .rodata so they
954 && !TREE_READONLY (decl
)
955 && initializer_zerop (DECL_INITIAL (decl
))));
958 /* Compute the alignment of variable specified by DECL.
959 DONT_OUTPUT_DATA is from assemble_variable. */
962 align_variable (tree decl
, bool dont_output_data
)
964 unsigned int align
= DECL_ALIGN (decl
);
966 /* In the case for initialing an array whose length isn't specified,
967 where we have not yet been able to do the layout,
968 figure out the proper alignment now. */
969 if (dont_output_data
&& DECL_SIZE (decl
) == 0
970 && TREE_CODE (TREE_TYPE (decl
)) == ARRAY_TYPE
)
971 align
= MAX (align
, TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl
))));
973 /* Some object file formats have a maximum alignment which they support.
974 In particular, a.out format supports a maximum alignment of 4. */
975 if (align
> MAX_OFILE_ALIGNMENT
)
977 error ("alignment of %q+D is greater than maximum object "
978 "file alignment %d", decl
,
979 MAX_OFILE_ALIGNMENT
/BITS_PER_UNIT
);
980 align
= MAX_OFILE_ALIGNMENT
;
983 if (! DECL_USER_ALIGN (decl
))
985 #ifdef DATA_ABI_ALIGNMENT
986 unsigned int data_abi_align
987 = DATA_ABI_ALIGNMENT (TREE_TYPE (decl
), align
);
988 /* For backwards compatibility, don't assume the ABI alignment for
990 if (! DECL_THREAD_LOCAL_P (decl
) || data_abi_align
<= BITS_PER_WORD
)
991 align
= data_abi_align
;
994 /* On some machines, it is good to increase alignment sometimes.
995 But as DECL_ALIGN is used both for actually emitting the variable
996 and for code accessing the variable as guaranteed alignment, we
997 can only increase the alignment if it is a performance optimization
998 if the references to it must bind to the current definition. */
999 if (decl_binds_to_current_def_p (decl
)
1000 && !DECL_VIRTUAL_P (decl
))
1002 #ifdef DATA_ALIGNMENT
1003 unsigned int data_align
= DATA_ALIGNMENT (TREE_TYPE (decl
), align
);
1004 /* Don't increase alignment too much for TLS variables - TLS space
1006 if (! DECL_THREAD_LOCAL_P (decl
) || data_align
<= BITS_PER_WORD
)
1009 #ifdef CONSTANT_ALIGNMENT
1010 if (DECL_INITIAL (decl
) != 0
1011 && DECL_INITIAL (decl
) != error_mark_node
)
1013 unsigned int const_align
1014 = CONSTANT_ALIGNMENT (DECL_INITIAL (decl
), align
);
1015 /* Don't increase alignment too much for TLS variables - TLS
1016 space is too precious. */
1017 if (! DECL_THREAD_LOCAL_P (decl
) || const_align
<= BITS_PER_WORD
)
1018 align
= const_align
;
1024 /* Reset the alignment in case we have made it tighter, so we can benefit
1025 from it in get_pointer_alignment. */
1026 DECL_ALIGN (decl
) = align
;
1029 /* Return DECL_ALIGN (decl), possibly increased for optimization purposes
1030 beyond what align_variable returned. */
1033 get_variable_align (tree decl
)
1035 unsigned int align
= DECL_ALIGN (decl
);
1037 /* For user aligned vars or static vars align_variable already did
1039 if (DECL_USER_ALIGN (decl
) || !TREE_PUBLIC (decl
))
1042 #ifdef DATA_ABI_ALIGNMENT
1043 if (DECL_THREAD_LOCAL_P (decl
))
1044 align
= DATA_ABI_ALIGNMENT (TREE_TYPE (decl
), align
);
1047 /* For decls that bind to the current definition, align_variable
1048 did also everything, except for not assuming ABI required alignment
1049 of TLS variables. For other vars, increase the alignment here
1050 as an optimization. */
1051 if (!decl_binds_to_current_def_p (decl
))
1053 /* On some machines, it is good to increase alignment sometimes. */
1054 #ifdef DATA_ALIGNMENT
1055 unsigned int data_align
= DATA_ALIGNMENT (TREE_TYPE (decl
), align
);
1056 /* Don't increase alignment too much for TLS variables - TLS space
1058 if (! DECL_THREAD_LOCAL_P (decl
) || data_align
<= BITS_PER_WORD
)
1061 #ifdef CONSTANT_ALIGNMENT
1062 if (DECL_INITIAL (decl
) != 0 && DECL_INITIAL (decl
) != error_mark_node
)
1064 unsigned int const_align
= CONSTANT_ALIGNMENT (DECL_INITIAL (decl
),
1066 /* Don't increase alignment too much for TLS variables - TLS space
1068 if (! DECL_THREAD_LOCAL_P (decl
) || const_align
<= BITS_PER_WORD
)
1069 align
= const_align
;
1077 /* Return the section into which the given VAR_DECL or CONST_DECL
1078 should be placed. PREFER_NOSWITCH_P is true if a noswitch
1079 section should be used wherever possible. */
1082 get_variable_section (tree decl
, bool prefer_noswitch_p
)
1084 addr_space_t as
= ADDR_SPACE_GENERIC
;
1087 if (TREE_TYPE (decl
) != error_mark_node
)
1088 as
= TYPE_ADDR_SPACE (TREE_TYPE (decl
));
1090 if (DECL_COMMON (decl
))
1092 /* If the decl has been given an explicit section name, or it resides
1093 in a non-generic address space, then it isn't common, and shouldn't
1094 be handled as such. */
1095 gcc_assert (DECL_SECTION_NAME (decl
) == NULL
1096 && ADDR_SPACE_GENERIC_P (as
));
1097 if (DECL_THREAD_LOCAL_P (decl
))
1098 return tls_comm_section
;
1099 else if (TREE_PUBLIC (decl
) && bss_initializer_p (decl
))
1100 return comm_section
;
1103 if (DECL_INITIAL (decl
) == error_mark_node
)
1104 reloc
= contains_pointers_p (TREE_TYPE (decl
)) ? 3 : 0;
1105 else if (DECL_INITIAL (decl
))
1106 reloc
= compute_reloc_for_constant (DECL_INITIAL (decl
));
1110 resolve_unique_section (decl
, reloc
, flag_data_sections
);
1111 if (IN_NAMED_SECTION (decl
))
1112 return get_named_section (decl
, NULL
, reloc
);
1114 if (ADDR_SPACE_GENERIC_P (as
)
1115 && !DECL_THREAD_LOCAL_P (decl
)
1116 && !(prefer_noswitch_p
&& targetm
.have_switchable_bss_sections
)
1117 && bss_initializer_p (decl
))
1119 if (!TREE_PUBLIC (decl
)
1120 && !((flag_sanitize
& SANITIZE_ADDRESS
)
1121 && asan_protect_global (decl
)))
1122 return lcomm_section
;
1123 if (bss_noswitch_section
)
1124 return bss_noswitch_section
;
1127 return targetm
.asm_out
.select_section (decl
, reloc
,
1128 get_variable_align (decl
));
1131 /* Return the block into which object_block DECL should be placed. */
1133 static struct object_block
*
1134 get_block_for_decl (tree decl
)
1138 if (TREE_CODE (decl
) == VAR_DECL
)
1140 /* The object must be defined in this translation unit. */
1141 if (DECL_EXTERNAL (decl
))
1144 /* There's no point using object blocks for something that is
1145 isolated by definition. */
1146 if (DECL_COMDAT_GROUP (decl
))
1150 /* We can only calculate block offsets if the decl has a known
1152 if (DECL_SIZE_UNIT (decl
) == NULL
)
1154 if (!tree_fits_uhwi_p (DECL_SIZE_UNIT (decl
)))
1157 /* Find out which section should contain DECL. We cannot put it into
1158 an object block if it requires a standalone definition. */
1159 if (TREE_CODE (decl
) == VAR_DECL
)
1160 align_variable (decl
, 0);
1161 sect
= get_variable_section (decl
, true);
1162 if (SECTION_STYLE (sect
) == SECTION_NOSWITCH
)
1165 return get_block_for_section (sect
);
1168 /* Make sure block symbol SYMBOL is in block BLOCK. */
1171 change_symbol_block (rtx symbol
, struct object_block
*block
)
1173 if (block
!= SYMBOL_REF_BLOCK (symbol
))
1175 gcc_assert (SYMBOL_REF_BLOCK_OFFSET (symbol
) < 0);
1176 SYMBOL_REF_BLOCK (symbol
) = block
;
1180 /* Return true if it is possible to put DECL in an object_block. */
1183 use_blocks_for_decl_p (tree decl
)
1185 /* Only data DECLs can be placed into object blocks. */
1186 if (TREE_CODE (decl
) != VAR_DECL
&& TREE_CODE (decl
) != CONST_DECL
)
1189 /* Detect decls created by dw2_force_const_mem. Such decls are
1190 special because DECL_INITIAL doesn't specify the decl's true value.
1191 dw2_output_indirect_constants will instead call assemble_variable
1192 with dont_output_data set to 1 and then print the contents itself. */
1193 if (DECL_INITIAL (decl
) == decl
)
1196 /* If this decl is an alias, then we don't want to emit a
1198 if (lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)))
1201 return targetm
.use_blocks_for_decl_p (decl
);
1204 /* Create the DECL_RTL for a VAR_DECL or FUNCTION_DECL. DECL should
1205 have static storage duration. In other words, it should not be an
1206 automatic variable, including PARM_DECLs.
1208 There is, however, one exception: this function handles variables
1209 explicitly placed in a particular register by the user.
1211 This is never called for PARM_DECL nodes. */
1214 make_decl_rtl (tree decl
)
1216 const char *name
= 0;
1220 /* Check that we are not being given an automatic variable. */
1221 gcc_assert (TREE_CODE (decl
) != PARM_DECL
1222 && TREE_CODE (decl
) != RESULT_DECL
);
1224 /* A weak alias has TREE_PUBLIC set but not the other bits. */
1225 gcc_assert (TREE_CODE (decl
) != VAR_DECL
1226 || TREE_STATIC (decl
)
1227 || TREE_PUBLIC (decl
)
1228 || DECL_EXTERNAL (decl
)
1229 || DECL_REGISTER (decl
));
1231 /* And that we were not given a type or a label. */
1232 gcc_assert (TREE_CODE (decl
) != TYPE_DECL
1233 && TREE_CODE (decl
) != LABEL_DECL
);
1235 /* For a duplicate declaration, we can be called twice on the
1236 same DECL node. Don't discard the RTL already made. */
1237 if (DECL_RTL_SET_P (decl
))
1239 /* If the old RTL had the wrong mode, fix the mode. */
1240 x
= DECL_RTL (decl
);
1241 if (GET_MODE (x
) != DECL_MODE (decl
))
1242 SET_DECL_RTL (decl
, adjust_address_nv (x
, DECL_MODE (decl
), 0));
1244 if (TREE_CODE (decl
) != FUNCTION_DECL
&& DECL_REGISTER (decl
))
1247 /* ??? Another way to do this would be to maintain a hashed
1248 table of such critters. Instead of adding stuff to a DECL
1249 to give certain attributes to it, we could use an external
1250 hash map from DECL to set of attributes. */
1252 /* Let the target reassign the RTL if it wants.
1253 This is necessary, for example, when one machine specific
1254 decl attribute overrides another. */
1255 targetm
.encode_section_info (decl
, DECL_RTL (decl
), false);
1257 /* If the symbol has a SYMBOL_REF_BLOCK field, update it based
1258 on the new decl information. */
1260 && GET_CODE (XEXP (x
, 0)) == SYMBOL_REF
1261 && SYMBOL_REF_HAS_BLOCK_INFO_P (XEXP (x
, 0)))
1262 change_symbol_block (XEXP (x
, 0), get_block_for_decl (decl
));
1267 /* If this variable belongs to the global constant pool, retrieve the
1268 pre-computed RTL or recompute it in LTO mode. */
1269 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_IN_CONSTANT_POOL (decl
))
1271 SET_DECL_RTL (decl
, output_constant_def (DECL_INITIAL (decl
), 1));
1275 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
1277 if (name
[0] != '*' && TREE_CODE (decl
) != FUNCTION_DECL
1278 && DECL_REGISTER (decl
))
1280 error ("register name not specified for %q+D", decl
);
1282 else if (TREE_CODE (decl
) != FUNCTION_DECL
&& DECL_REGISTER (decl
))
1284 const char *asmspec
= name
+1;
1285 enum machine_mode mode
= DECL_MODE (decl
);
1286 reg_number
= decode_reg_name (asmspec
);
1287 /* First detect errors in declaring global registers. */
1288 if (reg_number
== -1)
1289 error ("register name not specified for %q+D", decl
);
1290 else if (reg_number
< 0)
1291 error ("invalid register name for %q+D", decl
);
1292 else if (mode
== BLKmode
)
1293 error ("data type of %q+D isn%'t suitable for a register",
1295 else if (!in_hard_reg_set_p (accessible_reg_set
, mode
, reg_number
))
1296 error ("the register specified for %q+D cannot be accessed"
1297 " by the current target", decl
);
1298 else if (!in_hard_reg_set_p (operand_reg_set
, mode
, reg_number
))
1299 error ("the register specified for %q+D is not general enough"
1300 " to be used as a register variable", decl
);
1301 else if (!HARD_REGNO_MODE_OK (reg_number
, mode
))
1302 error ("register specified for %q+D isn%'t suitable for data type",
1304 /* Now handle properly declared static register variables. */
1309 if (DECL_INITIAL (decl
) != 0 && TREE_STATIC (decl
))
1311 DECL_INITIAL (decl
) = 0;
1312 error ("global register variable has initial value");
1314 if (TREE_THIS_VOLATILE (decl
))
1315 warning (OPT_Wvolatile_register_var
,
1316 "optimization may eliminate reads and/or "
1317 "writes to register variables");
1319 /* If the user specified one of the eliminables registers here,
1320 e.g., FRAME_POINTER_REGNUM, we don't want to get this variable
1321 confused with that register and be eliminated. This usage is
1322 somewhat suspect... */
1324 SET_DECL_RTL (decl
, gen_rtx_raw_REG (mode
, reg_number
));
1325 ORIGINAL_REGNO (DECL_RTL (decl
)) = reg_number
;
1326 REG_USERVAR_P (DECL_RTL (decl
)) = 1;
1328 if (TREE_STATIC (decl
))
1330 /* Make this register global, so not usable for anything
1332 #ifdef ASM_DECLARE_REGISTER_GLOBAL
1333 name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
1334 ASM_DECLARE_REGISTER_GLOBAL (asm_out_file
, decl
, reg_number
, name
);
1336 nregs
= hard_regno_nregs
[reg_number
][mode
];
1338 globalize_reg (decl
, reg_number
+ --nregs
);
1341 /* As a register variable, it has no section. */
1345 /* Now handle ordinary static variables and functions (in memory).
1346 Also handle vars declared register invalidly. */
1347 else if (name
[0] == '*')
1349 #ifdef REGISTER_PREFIX
1350 if (strlen (REGISTER_PREFIX
) != 0)
1352 reg_number
= decode_reg_name (name
);
1353 if (reg_number
>= 0 || reg_number
== -3)
1354 error ("register name given for non-register variable %q+D", decl
);
1359 /* Specifying a section attribute on a variable forces it into a
1360 non-.bss section, and thus it cannot be common. */
1361 /* FIXME: In general this code should not be necessary because
1362 visibility pass is doing the same work. But notice_global_symbol
1363 is called early and it needs to make DECL_RTL to get the name.
1364 we take care of recomputing the DECL_RTL after visibility is changed. */
1365 if (TREE_CODE (decl
) == VAR_DECL
1366 && DECL_SECTION_NAME (decl
) != NULL_TREE
1367 && DECL_INITIAL (decl
) == NULL_TREE
1368 && DECL_COMMON (decl
))
1369 DECL_COMMON (decl
) = 0;
1371 /* Variables can't be both common and weak. */
1372 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_WEAK (decl
))
1373 DECL_COMMON (decl
) = 0;
1375 if (use_object_blocks_p () && use_blocks_for_decl_p (decl
))
1376 x
= create_block_symbol (name
, get_block_for_decl (decl
), -1);
1379 enum machine_mode address_mode
= Pmode
;
1380 if (TREE_TYPE (decl
) != error_mark_node
)
1382 addr_space_t as
= TYPE_ADDR_SPACE (TREE_TYPE (decl
));
1383 address_mode
= targetm
.addr_space
.address_mode (as
);
1385 x
= gen_rtx_SYMBOL_REF (address_mode
, name
);
1387 SYMBOL_REF_WEAK (x
) = DECL_WEAK (decl
);
1388 SET_SYMBOL_REF_DECL (x
, decl
);
1390 x
= gen_rtx_MEM (DECL_MODE (decl
), x
);
1391 if (TREE_CODE (decl
) != FUNCTION_DECL
)
1392 set_mem_attributes (x
, decl
, 1);
1393 SET_DECL_RTL (decl
, x
);
1395 /* Optionally set flags or add text to the name to record information
1396 such as that it is a function name.
1397 If the name is changed, the macro ASM_OUTPUT_LABELREF
1398 will have to know how to strip this information. */
1399 targetm
.encode_section_info (decl
, DECL_RTL (decl
), true);
1402 /* Like make_decl_rtl, but inhibit creation of new alias sets when
1403 calling make_decl_rtl. Also, reset DECL_RTL before returning the
1407 make_decl_rtl_for_debug (tree decl
)
1409 unsigned int save_aliasing_flag
;
1412 if (DECL_RTL_SET_P (decl
))
1413 return DECL_RTL (decl
);
1415 /* Kludge alert! Somewhere down the call chain, make_decl_rtl will
1416 call new_alias_set. If running with -fcompare-debug, sometimes
1417 we do not want to create alias sets that will throw the alias
1418 numbers off in the comparison dumps. So... clearing
1419 flag_strict_aliasing will keep new_alias_set() from creating a
1421 save_aliasing_flag
= flag_strict_aliasing
;
1422 flag_strict_aliasing
= 0;
1424 rtl
= DECL_RTL (decl
);
1425 /* Reset DECL_RTL back, as various parts of the compiler expects
1426 DECL_RTL set meaning it is actually going to be output. */
1427 SET_DECL_RTL (decl
, NULL
);
1429 flag_strict_aliasing
= save_aliasing_flag
;
1433 /* Output a string of literal assembler code
1434 for an `asm' keyword used between functions. */
1437 assemble_asm (tree string
)
1442 if (TREE_CODE (string
) == ADDR_EXPR
)
1443 string
= TREE_OPERAND (string
, 0);
1445 p
= TREE_STRING_POINTER (string
);
1446 fprintf (asm_out_file
, "%s%s\n", p
[0] == '\t' ? "" : "\t", p
);
1449 /* Write the address of the entity given by SYMBOL to SEC. */
1451 assemble_addr_to_section (rtx symbol
, section
*sec
)
1453 switch_to_section (sec
);
1454 assemble_align (POINTER_SIZE
);
1455 assemble_integer (symbol
, POINTER_SIZE
/ BITS_PER_UNIT
, POINTER_SIZE
, 1);
1458 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
1459 not) section for PRIORITY. */
1461 get_cdtor_priority_section (int priority
, bool constructor_p
)
1465 /* ??? This only works reliably with the GNU linker. */
1466 sprintf (buf
, "%s.%.5u",
1467 constructor_p
? ".ctors" : ".dtors",
1468 /* Invert the numbering so the linker puts us in the proper
1469 order; constructors are run from right to left, and the
1470 linker sorts in increasing order. */
1471 MAX_INIT_PRIORITY
- priority
);
1472 return get_section (buf
, SECTION_WRITE
, NULL
);
1476 default_named_section_asm_out_destructor (rtx symbol
, int priority
)
1480 if (priority
!= DEFAULT_INIT_PRIORITY
)
1481 sec
= get_cdtor_priority_section (priority
,
1482 /*constructor_p=*/false);
1484 sec
= get_section (".dtors", SECTION_WRITE
, NULL
);
1486 assemble_addr_to_section (symbol
, sec
);
1489 #ifdef DTORS_SECTION_ASM_OP
1491 default_dtor_section_asm_out_destructor (rtx symbol
,
1492 int priority ATTRIBUTE_UNUSED
)
1494 assemble_addr_to_section (symbol
, dtors_section
);
1499 default_named_section_asm_out_constructor (rtx symbol
, int priority
)
1503 if (priority
!= DEFAULT_INIT_PRIORITY
)
1504 sec
= get_cdtor_priority_section (priority
,
1505 /*constructor_p=*/true);
1507 sec
= get_section (".ctors", SECTION_WRITE
, NULL
);
1509 assemble_addr_to_section (symbol
, sec
);
1512 #ifdef CTORS_SECTION_ASM_OP
1514 default_ctor_section_asm_out_constructor (rtx symbol
,
1515 int priority ATTRIBUTE_UNUSED
)
1517 assemble_addr_to_section (symbol
, ctors_section
);
1521 /* CONSTANT_POOL_BEFORE_FUNCTION may be defined as an expression with
1522 a nonzero value if the constant pool should be output before the
1523 start of the function, or a zero value if the pool should output
1524 after the end of the function. The default is to put it before the
1527 #ifndef CONSTANT_POOL_BEFORE_FUNCTION
1528 #define CONSTANT_POOL_BEFORE_FUNCTION 1
1531 /* DECL is an object (either VAR_DECL or FUNCTION_DECL) which is going
1532 to be output to assembler.
1533 Set first_global_object_name and weak_global_object_name as appropriate. */
1536 notice_global_symbol (tree decl
)
1538 const char **type
= &first_global_object_name
;
1540 if (first_global_object_name
1541 || !TREE_PUBLIC (decl
)
1542 || DECL_EXTERNAL (decl
)
1543 || !DECL_NAME (decl
)
1544 || (TREE_CODE (decl
) != FUNCTION_DECL
1545 && (TREE_CODE (decl
) != VAR_DECL
1546 || (DECL_COMMON (decl
)
1547 && (DECL_INITIAL (decl
) == 0
1548 || DECL_INITIAL (decl
) == error_mark_node
))))
1549 || !MEM_P (DECL_RTL (decl
)))
1552 /* We win when global object is found, but it is useful to know about weak
1553 symbol as well so we can produce nicer unique names. */
1554 if (DECL_WEAK (decl
) || DECL_ONE_ONLY (decl
) || flag_shlib
)
1555 type
= &weak_global_object_name
;
1561 rtx decl_rtl
= DECL_RTL (decl
);
1563 p
= targetm
.strip_name_encoding (XSTR (XEXP (decl_rtl
, 0), 0));
1564 name
= ggc_strdup (p
);
1570 /* If not using flag_reorder_blocks_and_partition, decide early whether the
1571 current function goes into the cold section, so that targets can use
1572 current_function_section during RTL expansion. DECL describes the
1576 decide_function_section (tree decl
)
1578 first_function_block_is_cold
= false;
1580 if (flag_reorder_blocks_and_partition
)
1581 /* We will decide in assemble_start_function. */
1584 if (DECL_SECTION_NAME (decl
))
1586 struct cgraph_node
*node
= cgraph_get_node (current_function_decl
);
1587 /* Calls to function_section rely on first_function_block_is_cold
1589 first_function_block_is_cold
= (node
1591 == NODE_FREQUENCY_UNLIKELY_EXECUTED
);
1594 in_cold_section_p
= first_function_block_is_cold
;
1597 /* Output assembler code for the constant pool of a function and associated
1598 with defining the name of the function. DECL describes the function.
1599 NAME is the function's name. For the constant pool, we use the current
1600 constant pool data. */
1603 assemble_start_function (tree decl
, const char *fnname
)
1606 char tmp_label
[100];
1607 bool hot_label_written
= false;
1609 if (flag_reorder_blocks_and_partition
)
1611 ASM_GENERATE_INTERNAL_LABEL (tmp_label
, "LHOTB", const_labelno
);
1612 crtl
->subsections
.hot_section_label
= ggc_strdup (tmp_label
);
1613 ASM_GENERATE_INTERNAL_LABEL (tmp_label
, "LCOLDB", const_labelno
);
1614 crtl
->subsections
.cold_section_label
= ggc_strdup (tmp_label
);
1615 ASM_GENERATE_INTERNAL_LABEL (tmp_label
, "LHOTE", const_labelno
);
1616 crtl
->subsections
.hot_section_end_label
= ggc_strdup (tmp_label
);
1617 ASM_GENERATE_INTERNAL_LABEL (tmp_label
, "LCOLDE", const_labelno
);
1618 crtl
->subsections
.cold_section_end_label
= ggc_strdup (tmp_label
);
1623 crtl
->subsections
.hot_section_label
= NULL
;
1624 crtl
->subsections
.cold_section_label
= NULL
;
1625 crtl
->subsections
.hot_section_end_label
= NULL
;
1626 crtl
->subsections
.cold_section_end_label
= NULL
;
1629 /* The following code does not need preprocessing in the assembler. */
1633 if (CONSTANT_POOL_BEFORE_FUNCTION
)
1634 output_constant_pool (fnname
, decl
);
1636 /* Make sure the not and cold text (code) sections are properly
1637 aligned. This is necessary here in the case where the function
1638 has both hot and cold sections, because we don't want to re-set
1639 the alignment when the section switch happens mid-function. */
1641 if (flag_reorder_blocks_and_partition
)
1643 first_function_block_is_cold
= false;
1645 switch_to_section (unlikely_text_section ());
1646 assemble_align (DECL_ALIGN (decl
));
1647 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.cold_section_label
);
1649 /* When the function starts with a cold section, we need to explicitly
1650 align the hot section and write out the hot section label.
1651 But if the current function is a thunk, we do not have a CFG. */
1653 && BB_PARTITION (ENTRY_BLOCK_PTR_FOR_FN (cfun
)->next_bb
) == BB_COLD_PARTITION
)
1655 switch_to_section (text_section
);
1656 assemble_align (DECL_ALIGN (decl
));
1657 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.hot_section_label
);
1658 hot_label_written
= true;
1659 first_function_block_is_cold
= true;
1661 in_cold_section_p
= first_function_block_is_cold
;
1665 /* Switch to the correct text section for the start of the function. */
1667 switch_to_section (function_section (decl
));
1668 if (flag_reorder_blocks_and_partition
1669 && !hot_label_written
)
1670 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.hot_section_label
);
1672 /* Tell assembler to move to target machine's alignment for functions. */
1673 align
= floor_log2 (DECL_ALIGN (decl
) / BITS_PER_UNIT
);
1676 ASM_OUTPUT_ALIGN (asm_out_file
, align
);
1679 /* Handle a user-specified function alignment.
1680 Note that we still need to align to DECL_ALIGN, as above,
1681 because ASM_OUTPUT_MAX_SKIP_ALIGN might not do any alignment at all. */
1682 if (! DECL_USER_ALIGN (decl
)
1683 && align_functions_log
> align
1684 && optimize_function_for_speed_p (cfun
))
1686 #ifdef ASM_OUTPUT_MAX_SKIP_ALIGN
1687 ASM_OUTPUT_MAX_SKIP_ALIGN (asm_out_file
,
1688 align_functions_log
, align_functions
- 1);
1690 ASM_OUTPUT_ALIGN (asm_out_file
, align_functions_log
);
1694 #ifdef ASM_OUTPUT_FUNCTION_PREFIX
1695 ASM_OUTPUT_FUNCTION_PREFIX (asm_out_file
, fnname
);
1698 if (!DECL_IGNORED_P (decl
))
1699 (*debug_hooks
->begin_function
) (decl
);
1701 /* Make function name accessible from other files, if appropriate. */
1703 if (TREE_PUBLIC (decl
))
1705 notice_global_symbol (decl
);
1707 globalize_decl (decl
);
1709 maybe_assemble_visibility (decl
);
1712 if (DECL_PRESERVE_P (decl
))
1713 targetm
.asm_out
.mark_decl_preserved (fnname
);
1715 /* Do any machine/system dependent processing of the function name. */
1716 #ifdef ASM_DECLARE_FUNCTION_NAME
1717 ASM_DECLARE_FUNCTION_NAME (asm_out_file
, fnname
, current_function_decl
);
1719 /* Standard thing is just output label for the function. */
1720 ASM_OUTPUT_FUNCTION_LABEL (asm_out_file
, fnname
, current_function_decl
);
1721 #endif /* ASM_DECLARE_FUNCTION_NAME */
1723 if (lookup_attribute ("no_split_stack", DECL_ATTRIBUTES (decl
)))
1724 saw_no_split_stack
= true;
1727 /* Output assembler code associated with defining the size of the
1728 function. DECL describes the function. NAME is the function's name. */
1731 assemble_end_function (tree decl
, const char *fnname ATTRIBUTE_UNUSED
)
1733 #ifdef ASM_DECLARE_FUNCTION_SIZE
1734 /* We could have switched section in the middle of the function. */
1735 if (flag_reorder_blocks_and_partition
)
1736 switch_to_section (function_section (decl
));
1737 ASM_DECLARE_FUNCTION_SIZE (asm_out_file
, fnname
, decl
);
1739 if (! CONSTANT_POOL_BEFORE_FUNCTION
)
1741 output_constant_pool (fnname
, decl
);
1742 switch_to_section (function_section (decl
)); /* need to switch back */
1744 /* Output labels for end of hot/cold text sections (to be used by
1746 if (flag_reorder_blocks_and_partition
)
1748 section
*save_text_section
;
1750 save_text_section
= in_section
;
1751 switch_to_section (unlikely_text_section ());
1752 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.cold_section_end_label
);
1753 if (first_function_block_is_cold
)
1754 switch_to_section (text_section
);
1756 switch_to_section (function_section (decl
));
1757 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.hot_section_end_label
);
1758 switch_to_section (save_text_section
);
1762 /* Assemble code to leave SIZE bytes of zeros. */
1765 assemble_zeros (unsigned HOST_WIDE_INT size
)
1767 /* Do no output if -fsyntax-only. */
1768 if (flag_syntax_only
)
1771 #ifdef ASM_NO_SKIP_IN_TEXT
1772 /* The `space' pseudo in the text section outputs nop insns rather than 0s,
1773 so we must output 0s explicitly in the text section. */
1774 if (ASM_NO_SKIP_IN_TEXT
&& (in_section
->common
.flags
& SECTION_CODE
) != 0)
1776 unsigned HOST_WIDE_INT i
;
1777 for (i
= 0; i
< size
; i
++)
1778 assemble_integer (const0_rtx
, 1, BITS_PER_UNIT
, 1);
1783 ASM_OUTPUT_SKIP (asm_out_file
, size
);
1786 /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
1789 assemble_align (int align
)
1791 if (align
> BITS_PER_UNIT
)
1793 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (align
/ BITS_PER_UNIT
));
1797 /* Assemble a string constant with the specified C string as contents. */
1800 assemble_string (const char *p
, int size
)
1805 /* If the string is very long, split it up. */
1809 int thissize
= size
- pos
;
1810 if (thissize
> maximum
)
1813 ASM_OUTPUT_ASCII (asm_out_file
, p
, thissize
);
1821 /* A noswitch_section_callback for lcomm_section. */
1824 emit_local (tree decl ATTRIBUTE_UNUSED
,
1825 const char *name ATTRIBUTE_UNUSED
,
1826 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED
,
1827 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
)
1829 #if defined ASM_OUTPUT_ALIGNED_DECL_LOCAL
1830 ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file
, decl
, name
,
1831 size
, DECL_ALIGN (decl
));
1833 #elif defined ASM_OUTPUT_ALIGNED_LOCAL
1834 ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file
, name
, size
, DECL_ALIGN (decl
));
1837 ASM_OUTPUT_LOCAL (asm_out_file
, name
, size
, rounded
);
1842 /* A noswitch_section_callback for bss_noswitch_section. */
1844 #if defined ASM_OUTPUT_ALIGNED_BSS
1846 emit_bss (tree decl ATTRIBUTE_UNUSED
,
1847 const char *name ATTRIBUTE_UNUSED
,
1848 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED
,
1849 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
)
1851 #if defined ASM_OUTPUT_ALIGNED_BSS
1852 ASM_OUTPUT_ALIGNED_BSS (asm_out_file
, decl
, name
, size
,
1853 get_variable_align (decl
));
1859 /* A noswitch_section_callback for comm_section. */
1862 emit_common (tree decl ATTRIBUTE_UNUSED
,
1863 const char *name ATTRIBUTE_UNUSED
,
1864 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED
,
1865 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
)
1867 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
1868 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, decl
, name
,
1869 size
, get_variable_align (decl
));
1871 #elif defined ASM_OUTPUT_ALIGNED_COMMON
1872 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, name
, size
,
1873 get_variable_align (decl
));
1876 ASM_OUTPUT_COMMON (asm_out_file
, name
, size
, rounded
);
1881 /* A noswitch_section_callback for tls_comm_section. */
1884 emit_tls_common (tree decl ATTRIBUTE_UNUSED
,
1885 const char *name ATTRIBUTE_UNUSED
,
1886 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED
,
1887 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
)
1889 #ifdef ASM_OUTPUT_TLS_COMMON
1890 ASM_OUTPUT_TLS_COMMON (asm_out_file
, decl
, name
, size
);
1893 sorry ("thread-local COMMON data not implemented");
1898 /* Assemble DECL given that it belongs in SECTION_NOSWITCH section SECT.
1899 NAME is the name of DECL's SYMBOL_REF. */
1902 assemble_noswitch_variable (tree decl
, const char *name
, section
*sect
,
1905 unsigned HOST_WIDE_INT size
, rounded
;
1907 size
= tree_to_uhwi (DECL_SIZE_UNIT (decl
));
1910 if ((flag_sanitize
& SANITIZE_ADDRESS
) && asan_protect_global (decl
))
1911 size
+= asan_red_zone_size (size
);
1913 /* Don't allocate zero bytes of common,
1914 since that means "undefined external" in the linker. */
1918 /* Round size up to multiple of BIGGEST_ALIGNMENT bits
1919 so that each uninitialized object starts on such a boundary. */
1920 rounded
+= (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
) - 1;
1921 rounded
= (rounded
/ (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
)
1922 * (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
));
1924 if (!sect
->noswitch
.callback (decl
, name
, size
, rounded
)
1925 && (unsigned HOST_WIDE_INT
) (align
/ BITS_PER_UNIT
) > rounded
)
1926 error ("requested alignment for %q+D is greater than "
1927 "implemented alignment of %wu", decl
, rounded
);
1930 /* A subroutine of assemble_variable. Output the label and contents of
1931 DECL, whose address is a SYMBOL_REF with name NAME. DONT_OUTPUT_DATA
1932 is as for assemble_variable. */
1935 assemble_variable_contents (tree decl
, const char *name
,
1936 bool dont_output_data
)
1938 /* Do any machine/system dependent processing of the object. */
1939 #ifdef ASM_DECLARE_OBJECT_NAME
1940 last_assemble_variable_decl
= decl
;
1941 ASM_DECLARE_OBJECT_NAME (asm_out_file
, name
, decl
);
1943 /* Standard thing is just output label for the object. */
1944 ASM_OUTPUT_LABEL (asm_out_file
, name
);
1945 #endif /* ASM_DECLARE_OBJECT_NAME */
1947 if (!dont_output_data
)
1949 if (DECL_INITIAL (decl
)
1950 && DECL_INITIAL (decl
) != error_mark_node
1951 && !initializer_zerop (DECL_INITIAL (decl
)))
1952 /* Output the actual data. */
1953 output_constant (DECL_INITIAL (decl
),
1954 tree_to_uhwi (DECL_SIZE_UNIT (decl
)),
1955 get_variable_align (decl
));
1957 /* Leave space for it. */
1958 assemble_zeros (tree_to_uhwi (DECL_SIZE_UNIT (decl
)));
1962 /* Assemble everything that is needed for a variable or function declaration.
1963 Not used for automatic variables, and not used for function definitions.
1964 Should not be called for variables of incomplete structure type.
1966 TOP_LEVEL is nonzero if this variable has file scope.
1967 AT_END is nonzero if this is the special handling, at end of compilation,
1968 to define things that have had only tentative definitions.
1969 DONT_OUTPUT_DATA if nonzero means don't actually output the
1970 initial value (that will be done by the caller). */
1973 assemble_variable (tree decl
, int top_level ATTRIBUTE_UNUSED
,
1974 int at_end ATTRIBUTE_UNUSED
, int dont_output_data
)
1977 rtx decl_rtl
, symbol
;
1980 bool asan_protected
= false;
1982 /* This function is supposed to handle VARIABLES. Ensure we have one. */
1983 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
1985 /* Emulated TLS had better not get this far. */
1986 gcc_checking_assert (targetm
.have_tls
|| !DECL_THREAD_LOCAL_P (decl
));
1988 last_assemble_variable_decl
= 0;
1990 /* Normally no need to say anything here for external references,
1991 since assemble_external is called by the language-specific code
1992 when a declaration is first seen. */
1994 if (DECL_EXTERNAL (decl
))
1997 /* Do nothing for global register variables. */
1998 if (DECL_RTL_SET_P (decl
) && REG_P (DECL_RTL (decl
)))
2000 TREE_ASM_WRITTEN (decl
) = 1;
2004 /* If type was incomplete when the variable was declared,
2005 see if it is complete now. */
2007 if (DECL_SIZE (decl
) == 0)
2008 layout_decl (decl
, 0);
2010 /* Still incomplete => don't allocate it; treat the tentative defn
2011 (which is what it must have been) as an `extern' reference. */
2013 if (!dont_output_data
&& DECL_SIZE (decl
) == 0)
2015 error ("storage size of %q+D isn%'t known", decl
);
2016 TREE_ASM_WRITTEN (decl
) = 1;
2020 /* The first declaration of a variable that comes through this function
2021 decides whether it is global (in C, has external linkage)
2022 or local (in C, has internal linkage). So do nothing more
2023 if this function has already run. */
2025 if (TREE_ASM_WRITTEN (decl
))
2028 /* Make sure targetm.encode_section_info is invoked before we set
2030 decl_rtl
= DECL_RTL (decl
);
2032 TREE_ASM_WRITTEN (decl
) = 1;
2034 /* Do no output if -fsyntax-only. */
2035 if (flag_syntax_only
)
2038 if (! dont_output_data
2039 && ! valid_constant_size_p (DECL_SIZE_UNIT (decl
)))
2041 error ("size of variable %q+D is too large", decl
);
2045 gcc_assert (MEM_P (decl_rtl
));
2046 gcc_assert (GET_CODE (XEXP (decl_rtl
, 0)) == SYMBOL_REF
);
2047 symbol
= XEXP (decl_rtl
, 0);
2049 /* If this symbol belongs to the tree constant pool, output the constant
2050 if it hasn't already been written. */
2051 if (TREE_CONSTANT_POOL_ADDRESS_P (symbol
))
2053 tree decl
= SYMBOL_REF_DECL (symbol
);
2054 if (!TREE_ASM_WRITTEN (DECL_INITIAL (decl
)))
2055 output_constant_def_contents (symbol
);
2061 name
= XSTR (symbol
, 0);
2062 if (TREE_PUBLIC (decl
) && DECL_NAME (decl
))
2063 notice_global_symbol (decl
);
2065 /* Compute the alignment of this data. */
2067 align_variable (decl
, dont_output_data
);
2069 if ((flag_sanitize
& SANITIZE_ADDRESS
)
2070 && asan_protect_global (decl
))
2072 asan_protected
= true;
2073 DECL_ALIGN (decl
) = MAX (DECL_ALIGN (decl
),
2074 ASAN_RED_ZONE_SIZE
* BITS_PER_UNIT
);
2077 set_mem_align (decl_rtl
, DECL_ALIGN (decl
));
2079 align
= get_variable_align (decl
);
2081 if (TREE_PUBLIC (decl
))
2082 maybe_assemble_visibility (decl
);
2084 if (DECL_PRESERVE_P (decl
))
2085 targetm
.asm_out
.mark_decl_preserved (name
);
2087 /* First make the assembler name(s) global if appropriate. */
2088 sect
= get_variable_section (decl
, false);
2089 if (TREE_PUBLIC (decl
)
2090 && (sect
->common
.flags
& SECTION_COMMON
) == 0)
2091 globalize_decl (decl
);
2093 /* Output any data that we will need to use the address of. */
2094 if (DECL_INITIAL (decl
) && DECL_INITIAL (decl
) != error_mark_node
)
2095 output_addressed_constants (DECL_INITIAL (decl
));
2097 /* dbxout.c needs to know this. */
2098 if (sect
&& (sect
->common
.flags
& SECTION_CODE
) != 0)
2099 DECL_IN_TEXT_SECTION (decl
) = 1;
2101 /* If the decl is part of an object_block, make sure that the decl
2102 has been positioned within its block, but do not write out its
2103 definition yet. output_object_blocks will do that later. */
2104 if (SYMBOL_REF_HAS_BLOCK_INFO_P (symbol
) && SYMBOL_REF_BLOCK (symbol
))
2106 gcc_assert (!dont_output_data
);
2107 place_block_symbol (symbol
);
2109 else if (SECTION_STYLE (sect
) == SECTION_NOSWITCH
)
2110 assemble_noswitch_variable (decl
, name
, sect
, align
);
2113 /* The following bit of code ensures that vtable_map
2114 variables are not only in the comdat section, but that
2115 each variable has its own unique comdat name. If this
2116 code is removed, the variables end up in the same section
2117 with a single comdat name.
2119 FIXME: resolve_unique_section needs to deal better with
2120 decls with both DECL_SECTION_NAME and DECL_ONE_ONLY. Once
2121 that is fixed, this if-else statement can be replaced with
2122 a single call to "switch_to_section (sect)". */
2123 if (sect
->named
.name
2124 && (strcmp (sect
->named
.name
, ".vtable_map_vars") == 0))
2126 #if defined (OBJECT_FORMAT_ELF)
2127 targetm
.asm_out
.named_section (sect
->named
.name
,
2128 sect
->named
.common
.flags
2133 switch_to_section (sect
);
2137 switch_to_section (sect
);
2138 if (align
> BITS_PER_UNIT
)
2139 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (align
/ BITS_PER_UNIT
));
2140 assemble_variable_contents (decl
, name
, dont_output_data
);
2143 unsigned HOST_WIDE_INT
int size
2144 = tree_to_uhwi (DECL_SIZE_UNIT (decl
));
2145 assemble_zeros (asan_red_zone_size (size
));
2151 /* Given a function declaration (FN_DECL), this function assembles the
2152 function into the .preinit_array section. */
2155 assemble_vtv_preinit_initializer (tree fn_decl
)
2158 unsigned flags
= SECTION_WRITE
;
2159 rtx symbol
= XEXP (DECL_RTL (fn_decl
), 0);
2161 flags
|= SECTION_NOTYPE
;
2162 sect
= get_section (".preinit_array", flags
, fn_decl
);
2163 switch_to_section (sect
);
2164 assemble_addr_to_section (symbol
, sect
);
2167 /* Return 1 if type TYPE contains any pointers. */
2170 contains_pointers_p (tree type
)
2172 switch (TREE_CODE (type
))
2175 case REFERENCE_TYPE
:
2176 /* I'm not sure whether OFFSET_TYPE needs this treatment,
2177 so I'll play safe and return 1. */
2183 case QUAL_UNION_TYPE
:
2186 /* For a type that has fields, see if the fields have pointers. */
2187 for (fields
= TYPE_FIELDS (type
); fields
; fields
= DECL_CHAIN (fields
))
2188 if (TREE_CODE (fields
) == FIELD_DECL
2189 && contains_pointers_p (TREE_TYPE (fields
)))
2195 /* An array type contains pointers if its element type does. */
2196 return contains_pointers_p (TREE_TYPE (type
));
2203 /* We delay assemble_external processing until
2204 the compilation unit is finalized. This is the best we can do for
2205 right now (i.e. stage 3 of GCC 4.0) - the right thing is to delay
2206 it all the way to final. See PR 17982 for further discussion. */
2207 static GTY(()) tree pending_assemble_externals
;
2209 #ifdef ASM_OUTPUT_EXTERNAL
2210 /* Some targets delay some output to final using TARGET_ASM_FILE_END.
2211 As a result, assemble_external can be called after the list of externals
2212 is processed and the pointer set destroyed. */
2213 static bool pending_assemble_externals_processed
;
2215 /* Avoid O(external_decls**2) lookups in the pending_assemble_externals
2216 TREE_LIST in assemble_external. */
2217 static struct pointer_set_t
*pending_assemble_externals_set
;
2219 /* True if DECL is a function decl for which no out-of-line copy exists.
2220 It is assumed that DECL's assembler name has been set. */
2223 incorporeal_function_p (tree decl
)
2225 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (decl
))
2229 if (DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
2230 && (DECL_FUNCTION_CODE (decl
) == BUILT_IN_ALLOCA
2231 || DECL_FUNCTION_CODE (decl
) == BUILT_IN_ALLOCA_WITH_ALIGN
))
2234 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
2235 /* Atomic or sync builtins which have survived this far will be
2236 resolved externally and therefore are not incorporeal. */
2237 if (strncmp (name
, "__builtin_", 10) == 0)
2243 /* Actually do the tests to determine if this is necessary, and invoke
2244 ASM_OUTPUT_EXTERNAL. */
2246 assemble_external_real (tree decl
)
2248 rtx rtl
= DECL_RTL (decl
);
2250 if (MEM_P (rtl
) && GET_CODE (XEXP (rtl
, 0)) == SYMBOL_REF
2251 && !SYMBOL_REF_USED (XEXP (rtl
, 0))
2252 && !incorporeal_function_p (decl
))
2254 /* Some systems do require some output. */
2255 SYMBOL_REF_USED (XEXP (rtl
, 0)) = 1;
2256 ASM_OUTPUT_EXTERNAL (asm_out_file
, decl
, XSTR (XEXP (rtl
, 0), 0));
2262 process_pending_assemble_externals (void)
2264 #ifdef ASM_OUTPUT_EXTERNAL
2266 for (list
= pending_assemble_externals
; list
; list
= TREE_CHAIN (list
))
2267 assemble_external_real (TREE_VALUE (list
));
2269 pending_assemble_externals
= 0;
2270 pending_assemble_externals_processed
= true;
2271 pointer_set_destroy (pending_assemble_externals_set
);
2275 /* This TREE_LIST contains any weak symbol declarations waiting
2277 static GTY(()) tree weak_decls
;
2279 /* Output something to declare an external symbol to the assembler,
2280 and qualifiers such as weakness. (Most assemblers don't need
2281 extern declaration, so we normally output nothing.) Do nothing if
2282 DECL is not external. */
2285 assemble_external (tree decl ATTRIBUTE_UNUSED
)
2287 /* Make sure that the ASM_OUT_FILE is open.
2288 If it's not, we should not be calling this function. */
2289 gcc_assert (asm_out_file
);
2291 /* In a perfect world, the following condition would be true.
2292 Sadly, the Java and Go front ends emit assembly *from the front end*,
2293 bypassing the call graph. See PR52739. Fix before GCC 4.8. */
2295 /* This function should only be called if we are expanding, or have
2297 Ideally, only final.c would be calling this function, but it is
2298 not clear whether that would break things somehow. See PR 17982
2299 for further discussion. */
2300 gcc_assert (cgraph_state
== CGRAPH_STATE_EXPANSION
2301 || cgraph_state
== CGRAPH_STATE_FINISHED
);
2304 if (!DECL_P (decl
) || !DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
))
2307 /* We want to output annotation for weak and external symbols at
2308 very last to check if they are references or not. */
2310 if (TARGET_SUPPORTS_WEAK
2312 /* TREE_STATIC is a weird and abused creature which is not
2313 generally the right test for whether an entity has been
2314 locally emitted, inlined or otherwise not-really-extern, but
2315 for declarations that can be weak, it happens to be
2317 && !TREE_STATIC (decl
)
2318 && lookup_attribute ("weak", DECL_ATTRIBUTES (decl
))
2319 && value_member (decl
, weak_decls
) == NULL_TREE
)
2320 weak_decls
= tree_cons (NULL
, decl
, weak_decls
);
2322 #ifdef ASM_OUTPUT_EXTERNAL
2323 if (pending_assemble_externals_processed
)
2325 assemble_external_real (decl
);
2329 if (! pointer_set_insert (pending_assemble_externals_set
, decl
))
2330 pending_assemble_externals
= tree_cons (NULL
, decl
,
2331 pending_assemble_externals
);
2335 /* Similar, for calling a library function FUN. */
2338 assemble_external_libcall (rtx fun
)
2340 /* Declare library function name external when first used, if nec. */
2341 if (! SYMBOL_REF_USED (fun
))
2343 SYMBOL_REF_USED (fun
) = 1;
2344 targetm
.asm_out
.external_libcall (fun
);
2348 /* Assemble a label named NAME. */
2351 assemble_label (FILE *file
, const char *name
)
2353 ASM_OUTPUT_LABEL (file
, name
);
2356 /* Set the symbol_referenced flag for ID. */
2358 mark_referenced (tree id
)
2360 TREE_SYMBOL_REFERENCED (id
) = 1;
2363 /* Set the symbol_referenced flag for DECL and notify callgraph. */
2365 mark_decl_referenced (tree decl
)
2367 if (TREE_CODE (decl
) == FUNCTION_DECL
)
2369 /* Extern inline functions don't become needed when referenced.
2370 If we know a method will be emitted in other TU and no new
2371 functions can be marked reachable, just use the external
2373 struct cgraph_node
*node
= cgraph_get_create_node (decl
);
2374 if (!DECL_EXTERNAL (decl
)
2375 && !node
->definition
)
2376 cgraph_mark_force_output_node (node
);
2378 else if (TREE_CODE (decl
) == VAR_DECL
)
2380 varpool_node
*node
= varpool_node_for_decl (decl
);
2381 /* C++ frontend use mark_decl_references to force COMDAT variables
2382 to be output that might appear dead otherwise. */
2383 node
->force_output
= true;
2385 /* else do nothing - we can get various sorts of CST nodes here,
2386 which do not need to be marked. */
2390 /* Follow the IDENTIFIER_TRANSPARENT_ALIAS chain starting at *ALIAS
2391 until we find an identifier that is not itself a transparent alias.
2392 Modify the alias passed to it by reference (and all aliases on the
2393 way to the ultimate target), such that they do not have to be
2394 followed again, and return the ultimate target of the alias
2398 ultimate_transparent_alias_target (tree
*alias
)
2400 tree target
= *alias
;
2402 if (IDENTIFIER_TRANSPARENT_ALIAS (target
))
2404 gcc_assert (TREE_CHAIN (target
));
2405 target
= ultimate_transparent_alias_target (&TREE_CHAIN (target
));
2406 gcc_assert (! IDENTIFIER_TRANSPARENT_ALIAS (target
)
2407 && ! TREE_CHAIN (target
));
2414 /* Output to FILE (an assembly file) a reference to NAME. If NAME
2415 starts with a *, the rest of NAME is output verbatim. Otherwise
2416 NAME is transformed in a target-specific way (usually by the
2417 addition of an underscore). */
2420 assemble_name_raw (FILE *file
, const char *name
)
2423 fputs (&name
[1], file
);
2425 ASM_OUTPUT_LABELREF (file
, name
);
2428 /* Like assemble_name_raw, but should be used when NAME might refer to
2429 an entity that is also represented as a tree (like a function or
2430 variable). If NAME does refer to such an entity, that entity will
2431 be marked as referenced. */
2434 assemble_name (FILE *file
, const char *name
)
2436 const char *real_name
;
2439 real_name
= targetm
.strip_name_encoding (name
);
2441 id
= maybe_get_identifier (real_name
);
2446 mark_referenced (id
);
2447 ultimate_transparent_alias_target (&id
);
2449 name
= IDENTIFIER_POINTER (id
);
2450 gcc_assert (! TREE_CHAIN (id
));
2453 assemble_name_raw (file
, name
);
2456 /* Allocate SIZE bytes writable static space with a gensym name
2457 and return an RTX to refer to its address. */
2460 assemble_static_space (unsigned HOST_WIDE_INT size
)
2463 const char *namestring
;
2466 ASM_GENERATE_INTERNAL_LABEL (name
, "LF", const_labelno
);
2468 namestring
= ggc_strdup (name
);
2470 x
= gen_rtx_SYMBOL_REF (Pmode
, namestring
);
2471 SYMBOL_REF_FLAGS (x
) = SYMBOL_FLAG_LOCAL
;
2473 #ifdef ASM_OUTPUT_ALIGNED_DECL_LOCAL
2474 ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file
, NULL_TREE
, name
, size
,
2477 #ifdef ASM_OUTPUT_ALIGNED_LOCAL
2478 ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file
, name
, size
, BIGGEST_ALIGNMENT
);
2481 /* Round size up to multiple of BIGGEST_ALIGNMENT bits
2482 so that each uninitialized object starts on such a boundary. */
2483 /* Variable `rounded' might or might not be used in ASM_OUTPUT_LOCAL. */
2484 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
2485 = ((size
+ (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
) - 1)
2486 / (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
)
2487 * (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
));
2488 ASM_OUTPUT_LOCAL (asm_out_file
, name
, size
, rounded
);
2495 /* Assemble the static constant template for function entry trampolines.
2496 This is done at most once per compilation.
2497 Returns an RTX for the address of the template. */
2499 static GTY(()) rtx initial_trampoline
;
2502 assemble_trampoline_template (void)
2509 gcc_assert (targetm
.asm_out
.trampoline_template
!= NULL
);
2511 if (initial_trampoline
)
2512 return initial_trampoline
;
2514 /* By default, put trampoline templates in read-only data section. */
2516 #ifdef TRAMPOLINE_SECTION
2517 switch_to_section (TRAMPOLINE_SECTION
);
2519 switch_to_section (readonly_data_section
);
2522 /* Write the assembler code to define one. */
2523 align
= floor_log2 (TRAMPOLINE_ALIGNMENT
/ BITS_PER_UNIT
);
2525 ASM_OUTPUT_ALIGN (asm_out_file
, align
);
2527 targetm
.asm_out
.internal_label (asm_out_file
, "LTRAMP", 0);
2528 targetm
.asm_out
.trampoline_template (asm_out_file
);
2530 /* Record the rtl to refer to it. */
2531 ASM_GENERATE_INTERNAL_LABEL (label
, "LTRAMP", 0);
2532 name
= ggc_strdup (label
);
2533 symbol
= gen_rtx_SYMBOL_REF (Pmode
, name
);
2534 SYMBOL_REF_FLAGS (symbol
) = SYMBOL_FLAG_LOCAL
;
2536 initial_trampoline
= gen_const_mem (BLKmode
, symbol
);
2537 set_mem_align (initial_trampoline
, TRAMPOLINE_ALIGNMENT
);
2538 set_mem_size (initial_trampoline
, TRAMPOLINE_SIZE
);
2540 return initial_trampoline
;
2543 /* A and B are either alignments or offsets. Return the minimum alignment
2544 that may be assumed after adding the two together. */
2546 static inline unsigned
2547 min_align (unsigned int a
, unsigned int b
)
2549 return (a
| b
) & -(a
| b
);
2552 /* Return the assembler directive for creating a given kind of integer
2553 object. SIZE is the number of bytes in the object and ALIGNED_P
2554 indicates whether it is known to be aligned. Return NULL if the
2555 assembly dialect has no such directive.
2557 The returned string should be printed at the start of a new line and
2558 be followed immediately by the object's initial value. */
2561 integer_asm_op (int size
, int aligned_p
)
2563 struct asm_int_op
*ops
;
2566 ops
= &targetm
.asm_out
.aligned_op
;
2568 ops
= &targetm
.asm_out
.unaligned_op
;
2573 return targetm
.asm_out
.byte_op
;
2587 /* Use directive OP to assemble an integer object X. Print OP at the
2588 start of the line, followed immediately by the value of X. */
2591 assemble_integer_with_op (const char *op
, rtx x
)
2593 fputs (op
, asm_out_file
);
2594 output_addr_const (asm_out_file
, x
);
2595 fputc ('\n', asm_out_file
);
2598 /* The default implementation of the asm_out.integer target hook. */
2601 default_assemble_integer (rtx x ATTRIBUTE_UNUSED
,
2602 unsigned int size ATTRIBUTE_UNUSED
,
2603 int aligned_p ATTRIBUTE_UNUSED
)
2605 const char *op
= integer_asm_op (size
, aligned_p
);
2606 /* Avoid GAS bugs for large values. Specifically negative values whose
2607 absolute value fits in a bfd_vma, but not in a bfd_signed_vma. */
2608 if (size
> UNITS_PER_WORD
&& size
> POINTER_SIZE
/ BITS_PER_UNIT
)
2610 return op
&& (assemble_integer_with_op (op
, x
), true);
2613 /* Assemble the integer constant X into an object of SIZE bytes. ALIGN is
2614 the alignment of the integer in bits. Return 1 if we were able to output
2615 the constant, otherwise 0. We must be able to output the constant,
2616 if FORCE is nonzero. */
2619 assemble_integer (rtx x
, unsigned int size
, unsigned int align
, int force
)
2623 aligned_p
= (align
>= MIN (size
* BITS_PER_UNIT
, BIGGEST_ALIGNMENT
));
2625 /* See if the target hook can handle this kind of object. */
2626 if (targetm
.asm_out
.integer (x
, size
, aligned_p
))
2629 /* If the object is a multi-byte one, try splitting it up. Split
2630 it into words it if is multi-word, otherwise split it into bytes. */
2633 enum machine_mode omode
, imode
;
2634 unsigned int subalign
;
2635 unsigned int subsize
, i
;
2636 enum mode_class mclass
;
2638 subsize
= size
> UNITS_PER_WORD
? UNITS_PER_WORD
: 1;
2639 subalign
= MIN (align
, subsize
* BITS_PER_UNIT
);
2640 if (GET_CODE (x
) == CONST_FIXED
)
2641 mclass
= GET_MODE_CLASS (GET_MODE (x
));
2645 omode
= mode_for_size (subsize
* BITS_PER_UNIT
, mclass
, 0);
2646 imode
= mode_for_size (size
* BITS_PER_UNIT
, mclass
, 0);
2648 for (i
= 0; i
< size
; i
+= subsize
)
2650 rtx partial
= simplify_subreg (omode
, x
, imode
, i
);
2651 if (!partial
|| !assemble_integer (partial
, subsize
, subalign
, 0))
2657 /* If we've printed some of it, but not all of it, there's no going
2662 gcc_assert (!force
);
2668 assemble_real (REAL_VALUE_TYPE d
, enum machine_mode mode
, unsigned int align
)
2670 long data
[4] = {0, 0, 0, 0};
2672 int bitsize
, nelts
, nunits
, units_per
;
2674 /* This is hairy. We have a quantity of known size. real_to_target
2675 will put it into an array of *host* longs, 32 bits per element
2676 (even if long is more than 32 bits). We need to determine the
2677 number of array elements that are occupied (nelts) and the number
2678 of *target* min-addressable units that will be occupied in the
2679 object file (nunits). We cannot assume that 32 divides the
2680 mode's bitsize (size * BITS_PER_UNIT) evenly.
2682 size * BITS_PER_UNIT is used here to make sure that padding bits
2683 (which might appear at either end of the value; real_to_target
2684 will include the padding bits in its output array) are included. */
2686 nunits
= GET_MODE_SIZE (mode
);
2687 bitsize
= nunits
* BITS_PER_UNIT
;
2688 nelts
= CEIL (bitsize
, 32);
2689 units_per
= 32 / BITS_PER_UNIT
;
2691 real_to_target (data
, &d
, mode
);
2693 /* Put out the first word with the specified alignment. */
2694 assemble_integer (GEN_INT (data
[0]), MIN (nunits
, units_per
), align
, 1);
2695 nunits
-= units_per
;
2697 /* Subsequent words need only 32-bit alignment. */
2698 align
= min_align (align
, 32);
2700 for (i
= 1; i
< nelts
; i
++)
2702 assemble_integer (GEN_INT (data
[i
]), MIN (nunits
, units_per
), align
, 1);
2703 nunits
-= units_per
;
2707 /* Given an expression EXP with a constant value,
2708 reduce it to the sum of an assembler symbol and an integer.
2709 Store them both in the structure *VALUE.
2710 EXP must be reducible. */
2714 HOST_WIDE_INT offset
;
2718 decode_addr_const (tree exp
, struct addr_const
*value
)
2720 tree target
= TREE_OPERAND (exp
, 0);
2726 if (TREE_CODE (target
) == COMPONENT_REF
2727 && tree_fits_shwi_p (byte_position (TREE_OPERAND (target
, 1))))
2729 offset
+= int_byte_position (TREE_OPERAND (target
, 1));
2730 target
= TREE_OPERAND (target
, 0);
2732 else if (TREE_CODE (target
) == ARRAY_REF
2733 || TREE_CODE (target
) == ARRAY_RANGE_REF
)
2735 offset
+= (tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (target
)))
2736 * tree_to_shwi (TREE_OPERAND (target
, 1)));
2737 target
= TREE_OPERAND (target
, 0);
2739 else if (TREE_CODE (target
) == MEM_REF
2740 && TREE_CODE (TREE_OPERAND (target
, 0)) == ADDR_EXPR
)
2742 offset
+= mem_ref_offset (target
).to_short_addr ();
2743 target
= TREE_OPERAND (TREE_OPERAND (target
, 0), 0);
2745 else if (TREE_CODE (target
) == INDIRECT_REF
2746 && TREE_CODE (TREE_OPERAND (target
, 0)) == NOP_EXPR
2747 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (target
, 0), 0))
2749 target
= TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (target
, 0), 0), 0);
2754 switch (TREE_CODE (target
))
2758 x
= DECL_RTL (target
);
2762 x
= gen_rtx_MEM (FUNCTION_MODE
,
2763 gen_rtx_LABEL_REF (Pmode
, force_label_rtx (target
)));
2772 x
= output_constant_def (target
, 1);
2779 gcc_assert (MEM_P (x
));
2783 value
->offset
= offset
;
2787 static GTY((param_is (struct constant_descriptor_tree
)))
2788 htab_t const_desc_htab
;
2790 static void maybe_output_constant_def_contents (struct constant_descriptor_tree
*, int);
2792 /* Constant pool accessor function. */
2795 constant_pool_htab (void)
2797 return const_desc_htab
;
2800 /* Compute a hash code for a constant expression. */
2803 const_desc_hash (const void *ptr
)
2805 return ((const struct constant_descriptor_tree
*)ptr
)->hash
;
2809 const_hash_1 (const tree exp
)
2814 enum tree_code code
= TREE_CODE (exp
);
2816 /* Either set P and LEN to the address and len of something to hash and
2817 exit the switch or return a value. */
2822 p
= (char *) &TREE_INT_CST_ELT (exp
, 0);
2823 len
= TREE_INT_CST_NUNITS (exp
) * sizeof (HOST_WIDE_INT
);
2827 return real_hash (TREE_REAL_CST_PTR (exp
));
2830 return fixed_hash (TREE_FIXED_CST_PTR (exp
));
2833 p
= TREE_STRING_POINTER (exp
);
2834 len
= TREE_STRING_LENGTH (exp
);
2838 return (const_hash_1 (TREE_REALPART (exp
)) * 5
2839 + const_hash_1 (TREE_IMAGPART (exp
)));
2845 hi
= 7 + VECTOR_CST_NELTS (exp
);
2847 for (i
= 0; i
< VECTOR_CST_NELTS (exp
); ++i
)
2848 hi
= hi
* 563 + const_hash_1 (VECTOR_CST_ELT (exp
, i
));
2855 unsigned HOST_WIDE_INT idx
;
2858 hi
= 5 + int_size_in_bytes (TREE_TYPE (exp
));
2860 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp
), idx
, value
)
2862 hi
= hi
* 603 + const_hash_1 (value
);
2870 struct addr_const value
;
2872 decode_addr_const (exp
, &value
);
2873 switch (GET_CODE (value
.base
))
2876 /* Don't hash the address of the SYMBOL_REF;
2877 only use the offset and the symbol name. */
2879 p
= XSTR (value
.base
, 0);
2880 for (i
= 0; p
[i
] != 0; i
++)
2881 hi
= ((hi
* 613) + (unsigned) (p
[i
]));
2885 hi
= value
.offset
+ CODE_LABEL_NUMBER (XEXP (value
.base
, 0)) * 13;
2895 case POINTER_PLUS_EXPR
:
2897 return (const_hash_1 (TREE_OPERAND (exp
, 0)) * 9
2898 + const_hash_1 (TREE_OPERAND (exp
, 1)));
2901 return const_hash_1 (TREE_OPERAND (exp
, 0)) * 7 + 2;
2904 /* A language specific constant. Just hash the code. */
2908 /* Compute hashing function. */
2910 for (i
= 0; i
< len
; i
++)
2911 hi
= ((hi
* 613) + (unsigned) (p
[i
]));
2916 /* Wrapper of compare_constant, for the htab interface. */
2918 const_desc_eq (const void *p1
, const void *p2
)
2920 const struct constant_descriptor_tree
*const c1
2921 = (const struct constant_descriptor_tree
*) p1
;
2922 const struct constant_descriptor_tree
*const c2
2923 = (const struct constant_descriptor_tree
*) p2
;
2924 if (c1
->hash
!= c2
->hash
)
2926 return compare_constant (c1
->value
, c2
->value
);
2929 /* Compare t1 and t2, and return 1 only if they are known to result in
2930 the same bit pattern on output. */
2933 compare_constant (const tree t1
, const tree t2
)
2935 enum tree_code typecode
;
2937 if (t1
== NULL_TREE
)
2938 return t2
== NULL_TREE
;
2939 if (t2
== NULL_TREE
)
2942 if (TREE_CODE (t1
) != TREE_CODE (t2
))
2945 switch (TREE_CODE (t1
))
2948 /* Integer constants are the same only if the same width of type. */
2949 if (TYPE_PRECISION (TREE_TYPE (t1
)) != TYPE_PRECISION (TREE_TYPE (t2
)))
2951 if (TYPE_MODE (TREE_TYPE (t1
)) != TYPE_MODE (TREE_TYPE (t2
)))
2953 return tree_int_cst_equal (t1
, t2
);
2956 /* Real constants are the same only if the same width of type. */
2957 if (TYPE_PRECISION (TREE_TYPE (t1
)) != TYPE_PRECISION (TREE_TYPE (t2
)))
2960 return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
2963 /* Fixed constants are the same only if the same width of type. */
2964 if (TYPE_PRECISION (TREE_TYPE (t1
)) != TYPE_PRECISION (TREE_TYPE (t2
)))
2967 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
2970 if (TYPE_MODE (TREE_TYPE (t1
)) != TYPE_MODE (TREE_TYPE (t2
)))
2973 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
2974 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
2975 TREE_STRING_LENGTH (t1
)));
2978 return (compare_constant (TREE_REALPART (t1
), TREE_REALPART (t2
))
2979 && compare_constant (TREE_IMAGPART (t1
), TREE_IMAGPART (t2
)));
2985 if (VECTOR_CST_NELTS (t1
) != VECTOR_CST_NELTS (t2
))
2988 for (i
= 0; i
< VECTOR_CST_NELTS (t1
); ++i
)
2989 if (!compare_constant (VECTOR_CST_ELT (t1
, i
),
2990 VECTOR_CST_ELT (t2
, i
)))
2998 vec
<constructor_elt
, va_gc
> *v1
, *v2
;
2999 unsigned HOST_WIDE_INT idx
;
3001 typecode
= TREE_CODE (TREE_TYPE (t1
));
3002 if (typecode
!= TREE_CODE (TREE_TYPE (t2
)))
3005 if (typecode
== ARRAY_TYPE
)
3007 HOST_WIDE_INT size_1
= int_size_in_bytes (TREE_TYPE (t1
));
3008 /* For arrays, check that the sizes all match. */
3009 if (TYPE_MODE (TREE_TYPE (t1
)) != TYPE_MODE (TREE_TYPE (t2
))
3011 || size_1
!= int_size_in_bytes (TREE_TYPE (t2
)))
3016 /* For record and union constructors, require exact type
3018 if (TREE_TYPE (t1
) != TREE_TYPE (t2
))
3022 v1
= CONSTRUCTOR_ELTS (t1
);
3023 v2
= CONSTRUCTOR_ELTS (t2
);
3024 if (vec_safe_length (v1
) != vec_safe_length (v2
))
3027 for (idx
= 0; idx
< vec_safe_length (v1
); ++idx
)
3029 constructor_elt
*c1
= &(*v1
)[idx
];
3030 constructor_elt
*c2
= &(*v2
)[idx
];
3032 /* Check that each value is the same... */
3033 if (!compare_constant (c1
->value
, c2
->value
))
3035 /* ... and that they apply to the same fields! */
3036 if (typecode
== ARRAY_TYPE
)
3038 if (!compare_constant (c1
->index
, c2
->index
))
3043 if (c1
->index
!= c2
->index
)
3054 struct addr_const value1
, value2
;
3058 decode_addr_const (t1
, &value1
);
3059 decode_addr_const (t2
, &value2
);
3061 if (value1
.offset
!= value2
.offset
)
3064 code
= GET_CODE (value1
.base
);
3065 if (code
!= GET_CODE (value2
.base
))
3071 ret
= (strcmp (XSTR (value1
.base
, 0), XSTR (value2
.base
, 0)) == 0);
3075 ret
= (CODE_LABEL_NUMBER (XEXP (value1
.base
, 0))
3076 == CODE_LABEL_NUMBER (XEXP (value2
.base
, 0)));
3086 case POINTER_PLUS_EXPR
:
3089 return (compare_constant (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0))
3090 && compare_constant (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1)));
3093 case VIEW_CONVERT_EXPR
:
3094 return compare_constant (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
3103 /* Make a copy of the whole tree structure for a constant. This
3104 handles the same types of nodes that compare_constant handles. */
3107 copy_constant (tree exp
)
3109 switch (TREE_CODE (exp
))
3112 /* For ADDR_EXPR, we do not want to copy the decl whose address
3113 is requested. We do want to copy constants though. */
3114 if (CONSTANT_CLASS_P (TREE_OPERAND (exp
, 0)))
3115 return build1 (TREE_CODE (exp
), TREE_TYPE (exp
),
3116 copy_constant (TREE_OPERAND (exp
, 0)));
3118 return copy_node (exp
);
3124 return copy_node (exp
);
3127 return build_complex (TREE_TYPE (exp
),
3128 copy_constant (TREE_REALPART (exp
)),
3129 copy_constant (TREE_IMAGPART (exp
)));
3132 case POINTER_PLUS_EXPR
:
3134 return build2 (TREE_CODE (exp
), TREE_TYPE (exp
),
3135 copy_constant (TREE_OPERAND (exp
, 0)),
3136 copy_constant (TREE_OPERAND (exp
, 1)));
3139 case VIEW_CONVERT_EXPR
:
3140 return build1 (TREE_CODE (exp
), TREE_TYPE (exp
),
3141 copy_constant (TREE_OPERAND (exp
, 0)));
3144 return build_vector (TREE_TYPE (exp
), VECTOR_CST_ELTS (exp
));
3148 tree copy
= copy_node (exp
);
3149 vec
<constructor_elt
, va_gc
> *v
;
3150 unsigned HOST_WIDE_INT idx
;
3151 tree purpose
, value
;
3153 vec_alloc (v
, vec_safe_length (CONSTRUCTOR_ELTS (exp
)));
3154 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (exp
), idx
, purpose
, value
)
3156 constructor_elt ce
= {purpose
, copy_constant (value
)};
3159 CONSTRUCTOR_ELTS (copy
) = v
;
3168 /* Return the section into which constant EXP should be placed. */
3171 get_constant_section (tree exp
, unsigned int align
)
3173 return targetm
.asm_out
.select_section (exp
,
3174 compute_reloc_for_constant (exp
),
3178 /* Return the size of constant EXP in bytes. */
3180 static HOST_WIDE_INT
3181 get_constant_size (tree exp
)
3185 size
= int_size_in_bytes (TREE_TYPE (exp
));
3186 if (TREE_CODE (exp
) == STRING_CST
)
3187 size
= MAX (TREE_STRING_LENGTH (exp
), size
);
3191 /* Subroutine of output_constant_def:
3192 No constant equal to EXP is known to have been output.
3193 Make a constant descriptor to enter EXP in the hash table.
3194 Assign the label number and construct RTL to refer to the
3195 constant's location in memory.
3196 Caller is responsible for updating the hash table. */
3198 static struct constant_descriptor_tree
*
3199 build_constant_desc (tree exp
)
3201 struct constant_descriptor_tree
*desc
;
3207 desc
= ggc_alloc
<constant_descriptor_tree
> ();
3208 desc
->value
= copy_constant (exp
);
3210 /* Create a string containing the label name, in LABEL. */
3211 labelno
= const_labelno
++;
3212 ASM_GENERATE_INTERNAL_LABEL (label
, "LC", labelno
);
3214 /* Construct the VAR_DECL associated with the constant. */
3215 decl
= build_decl (UNKNOWN_LOCATION
, VAR_DECL
, get_identifier (label
),
3217 DECL_ARTIFICIAL (decl
) = 1;
3218 DECL_IGNORED_P (decl
) = 1;
3219 TREE_READONLY (decl
) = 1;
3220 TREE_STATIC (decl
) = 1;
3221 TREE_ADDRESSABLE (decl
) = 1;
3222 /* We don't set the RTL yet as this would cause varpool to assume that the
3223 variable is referenced. Moreover, it would just be dropped in LTO mode.
3224 Instead we set the flag that will be recognized in make_decl_rtl. */
3225 DECL_IN_CONSTANT_POOL (decl
) = 1;
3226 DECL_INITIAL (decl
) = desc
->value
;
3227 /* ??? CONSTANT_ALIGNMENT hasn't been updated for vector types on most
3228 architectures so use DATA_ALIGNMENT as well, except for strings. */
3229 if (TREE_CODE (exp
) == STRING_CST
)
3231 #ifdef CONSTANT_ALIGNMENT
3232 DECL_ALIGN (decl
) = CONSTANT_ALIGNMENT (exp
, DECL_ALIGN (decl
));
3236 align_variable (decl
, 0);
3238 /* Now construct the SYMBOL_REF and the MEM. */
3239 if (use_object_blocks_p ())
3241 section
*sect
= get_constant_section (exp
, DECL_ALIGN (decl
));
3242 symbol
= create_block_symbol (ggc_strdup (label
),
3243 get_block_for_section (sect
), -1);
3246 symbol
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (label
));
3247 SYMBOL_REF_FLAGS (symbol
) |= SYMBOL_FLAG_LOCAL
;
3248 SET_SYMBOL_REF_DECL (symbol
, decl
);
3249 TREE_CONSTANT_POOL_ADDRESS_P (symbol
) = 1;
3251 rtl
= gen_const_mem (TYPE_MODE (TREE_TYPE (exp
)), symbol
);
3252 set_mem_attributes (rtl
, exp
, 1);
3253 set_mem_alias_set (rtl
, 0);
3254 set_mem_alias_set (rtl
, const_alias_set
);
3256 /* We cannot share RTX'es in pool entries.
3257 Mark this piece of RTL as required for unsharing. */
3258 RTX_FLAG (rtl
, used
) = 1;
3260 /* Set flags or add text to the name to record information, such as
3261 that it is a local symbol. If the name is changed, the macro
3262 ASM_OUTPUT_LABELREF will have to know how to strip this
3263 information. This call might invalidate our local variable
3264 SYMBOL; we can't use it afterward. */
3265 targetm
.encode_section_info (exp
, rtl
, true);
3272 /* Return an rtx representing a reference to constant data in memory
3273 for the constant expression EXP.
3275 If assembler code for such a constant has already been output,
3276 return an rtx to refer to it.
3277 Otherwise, output such a constant in memory
3278 and generate an rtx for it.
3280 If DEFER is nonzero, this constant can be deferred and output only
3281 if referenced in the function after all optimizations.
3283 `const_desc_table' records which constants already have label strings. */
3286 output_constant_def (tree exp
, int defer
)
3288 struct constant_descriptor_tree
*desc
;
3289 struct constant_descriptor_tree key
;
3292 /* Look up EXP in the table of constant descriptors. If we didn't find
3293 it, create a new one. */
3295 key
.hash
= const_hash_1 (exp
);
3296 loc
= htab_find_slot_with_hash (const_desc_htab
, &key
, key
.hash
, INSERT
);
3298 desc
= (struct constant_descriptor_tree
*) *loc
;
3301 desc
= build_constant_desc (exp
);
3302 desc
->hash
= key
.hash
;
3306 maybe_output_constant_def_contents (desc
, defer
);
3310 /* Subroutine of output_constant_def: Decide whether or not we need to
3311 output the constant DESC now, and if so, do it. */
3313 maybe_output_constant_def_contents (struct constant_descriptor_tree
*desc
,
3316 rtx symbol
= XEXP (desc
->rtl
, 0);
3317 tree exp
= desc
->value
;
3319 if (flag_syntax_only
)
3322 if (TREE_ASM_WRITTEN (exp
))
3323 /* Already output; don't do it again. */
3326 /* We can always defer constants as long as the context allows
3330 /* Increment n_deferred_constants if it exists. It needs to be at
3331 least as large as the number of constants actually referred to
3332 by the function. If it's too small we'll stop looking too early
3333 and fail to emit constants; if it's too large we'll only look
3334 through the entire function when we could have stopped earlier. */
3336 n_deferred_constants
++;
3340 output_constant_def_contents (symbol
);
3343 /* Subroutine of output_constant_def_contents. Output the definition
3344 of constant EXP, which is pointed to by label LABEL. ALIGN is the
3345 constant's alignment in bits. */
3348 assemble_constant_contents (tree exp
, const char *label
, unsigned int align
)
3352 size
= get_constant_size (exp
);
3354 /* Do any machine/system dependent processing of the constant. */
3355 targetm
.asm_out
.declare_constant_name (asm_out_file
, label
, exp
, size
);
3357 /* Output the value of EXP. */
3358 output_constant (exp
, size
, align
);
3361 /* We must output the constant data referred to by SYMBOL; do so. */
3364 output_constant_def_contents (rtx symbol
)
3366 tree decl
= SYMBOL_REF_DECL (symbol
);
3367 tree exp
= DECL_INITIAL (decl
);
3369 bool asan_protected
= false;
3371 /* Make sure any other constants whose addresses appear in EXP
3372 are assigned label numbers. */
3373 output_addressed_constants (exp
);
3375 /* We are no longer deferring this constant. */
3376 TREE_ASM_WRITTEN (decl
) = TREE_ASM_WRITTEN (exp
) = 1;
3378 if ((flag_sanitize
& SANITIZE_ADDRESS
)
3379 && TREE_CODE (exp
) == STRING_CST
3380 && asan_protect_global (exp
))
3382 asan_protected
= true;
3383 DECL_ALIGN (decl
) = MAX (DECL_ALIGN (decl
),
3384 ASAN_RED_ZONE_SIZE
* BITS_PER_UNIT
);
3387 /* If the constant is part of an object block, make sure that the
3388 decl has been positioned within its block, but do not write out
3389 its definition yet. output_object_blocks will do that later. */
3390 if (SYMBOL_REF_HAS_BLOCK_INFO_P (symbol
) && SYMBOL_REF_BLOCK (symbol
))
3391 place_block_symbol (symbol
);
3394 align
= DECL_ALIGN (decl
);
3395 switch_to_section (get_constant_section (exp
, align
));
3396 if (align
> BITS_PER_UNIT
)
3397 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (align
/ BITS_PER_UNIT
));
3398 assemble_constant_contents (exp
, XSTR (symbol
, 0), align
);
3401 HOST_WIDE_INT size
= get_constant_size (exp
);
3402 assemble_zeros (asan_red_zone_size (size
));
3407 /* Look up EXP in the table of constant descriptors. Return the rtl
3408 if it has been emitted, else null. */
3411 lookup_constant_def (tree exp
)
3413 struct constant_descriptor_tree
*desc
;
3414 struct constant_descriptor_tree key
;
3417 key
.hash
= const_hash_1 (exp
);
3418 desc
= (struct constant_descriptor_tree
*)
3419 htab_find_with_hash (const_desc_htab
, &key
, key
.hash
);
3421 return (desc
? desc
->rtl
: NULL_RTX
);
3424 /* Return a tree representing a reference to constant data in memory
3425 for the constant expression EXP.
3427 This is the counterpart of output_constant_def at the Tree level. */
3430 tree_output_constant_def (tree exp
)
3432 struct constant_descriptor_tree
*desc
, key
;
3436 /* Look up EXP in the table of constant descriptors. If we didn't find
3437 it, create a new one. */
3439 key
.hash
= const_hash_1 (exp
);
3440 loc
= htab_find_slot_with_hash (const_desc_htab
, &key
, key
.hash
, INSERT
);
3442 desc
= (struct constant_descriptor_tree
*) *loc
;
3445 desc
= build_constant_desc (exp
);
3446 desc
->hash
= key
.hash
;
3450 decl
= SYMBOL_REF_DECL (XEXP (desc
->rtl
, 0));
3451 varpool_finalize_decl (decl
);
3455 /* Used in the hash tables to avoid outputting the same constant
3456 twice. Unlike 'struct constant_descriptor_tree', RTX constants
3457 are output once per function, not once per file. */
3458 /* ??? Only a few targets need per-function constant pools. Most
3459 can use one per-file pool. Should add a targetm bit to tell the
3462 struct GTY(()) rtx_constant_pool
{
3463 /* Pointers to first and last constant in pool, as ordered by offset. */
3464 struct constant_descriptor_rtx
*first
;
3465 struct constant_descriptor_rtx
*last
;
3467 /* Hash facility for making memory-constants from constant rtl-expressions.
3468 It is used on RISC machines where immediate integer arguments and
3469 constant addresses are restricted so that such constants must be stored
3471 htab_t
GTY((param_is (struct constant_descriptor_rtx
))) const_rtx_htab
;
3473 /* Current offset in constant pool (does not include any
3474 machine-specific header). */
3475 HOST_WIDE_INT offset
;
3478 struct GTY((chain_next ("%h.next"))) constant_descriptor_rtx
{
3479 struct constant_descriptor_rtx
*next
;
3483 HOST_WIDE_INT offset
;
3485 enum machine_mode mode
;
3491 /* Hash and compare functions for const_rtx_htab. */
3494 const_desc_rtx_hash (const void *ptr
)
3496 const struct constant_descriptor_rtx
*const desc
3497 = (const struct constant_descriptor_rtx
*) ptr
;
3502 const_desc_rtx_eq (const void *a
, const void *b
)
3504 const struct constant_descriptor_rtx
*const x
3505 = (const struct constant_descriptor_rtx
*) a
;
3506 const struct constant_descriptor_rtx
*const y
3507 = (const struct constant_descriptor_rtx
*) b
;
3509 if (x
->mode
!= y
->mode
)
3511 return rtx_equal_p (x
->constant
, y
->constant
);
3514 /* This is the worker function for const_rtx_hash, called via for_each_rtx. */
3517 const_rtx_hash_1 (rtx
*xp
, void *data
)
3519 unsigned HOST_WIDE_INT hwi
;
3520 enum machine_mode mode
;
3527 code
= GET_CODE (x
);
3528 mode
= GET_MODE (x
);
3529 h
= (hashval_t
) code
* 1048573 + mode
;
3538 int shift
= sizeof (hashval_t
) * CHAR_BIT
;
3539 const int n
= sizeof (HOST_WIDE_INT
) / sizeof (hashval_t
);
3541 h
^= (hashval_t
) hwi
;
3542 for (i
= 1; i
< n
; ++i
)
3545 h
^= (hashval_t
) hwi
;
3550 case CONST_WIDE_INT
:
3551 hwi
= GET_MODE_PRECISION (mode
);
3553 for (i
= 0; i
< CONST_WIDE_INT_NUNITS (x
); i
++)
3554 hwi
^= CONST_WIDE_INT_ELT (x
, i
);
3559 if (TARGET_SUPPORTS_WIDE_INT
== 0 && mode
== VOIDmode
)
3561 hwi
= CONST_DOUBLE_LOW (x
) ^ CONST_DOUBLE_HIGH (x
);
3565 h
^= real_hash (CONST_DOUBLE_REAL_VALUE (x
));
3569 h
^= fixed_hash (CONST_FIXED_VALUE (x
));
3575 for (i
= XVECLEN (x
, 0); i
-- > 0; )
3576 h
= h
* 251 + const_rtx_hash_1 (&XVECEXP (x
, 0, i
), data
);
3581 h
^= htab_hash_string (XSTR (x
, 0));
3585 h
= h
* 251 + CODE_LABEL_NUMBER (XEXP (x
, 0));
3589 case UNSPEC_VOLATILE
:
3590 h
= h
* 251 + XINT (x
, 1);
3597 hp
= (hashval_t
*) data
;
3598 *hp
= *hp
* 509 + h
;
3602 /* Compute a hash value for X, which should be a constant. */
3605 const_rtx_hash (rtx x
)
3608 for_each_rtx (&x
, const_rtx_hash_1
, &h
);
3613 /* Create and return a new rtx constant pool. */
3615 static struct rtx_constant_pool
*
3616 create_constant_pool (void)
3618 struct rtx_constant_pool
*pool
;
3620 pool
= ggc_alloc
<rtx_constant_pool
> ();
3621 pool
->const_rtx_htab
= htab_create_ggc (31, const_desc_rtx_hash
,
3622 const_desc_rtx_eq
, NULL
);
3629 /* Initialize constant pool hashing for a new function. */
3632 init_varasm_status (void)
3634 crtl
->varasm
.pool
= create_constant_pool ();
3635 crtl
->varasm
.deferred_constants
= 0;
3638 /* Given a MINUS expression, simplify it if both sides
3639 include the same symbol. */
3642 simplify_subtraction (rtx x
)
3644 rtx r
= simplify_rtx (x
);
3648 /* Given a constant rtx X, make (or find) a memory constant for its value
3649 and return a MEM rtx to refer to it in memory. */
3652 force_const_mem (enum machine_mode mode
, rtx x
)
3654 struct constant_descriptor_rtx
*desc
, tmp
;
3655 struct rtx_constant_pool
*pool
;
3662 /* If we're not allowed to drop X into the constant pool, don't. */
3663 if (targetm
.cannot_force_const_mem (mode
, x
))
3666 /* Record that this function has used a constant pool entry. */
3667 crtl
->uses_const_pool
= 1;
3669 /* Decide which pool to use. */
3670 pool
= (targetm
.use_blocks_for_constant_p (mode
, x
)
3671 ? shared_constant_pool
3672 : crtl
->varasm
.pool
);
3674 /* Lookup the value in the hashtable. */
3677 hash
= const_rtx_hash (x
);
3678 slot
= htab_find_slot_with_hash (pool
->const_rtx_htab
, &tmp
, hash
, INSERT
);
3679 desc
= (struct constant_descriptor_rtx
*) *slot
;
3681 /* If the constant was already present, return its memory. */
3683 return copy_rtx (desc
->mem
);
3685 /* Otherwise, create a new descriptor. */
3686 desc
= ggc_alloc
<constant_descriptor_rtx
> ();
3689 /* Align the location counter as required by EXP's data type. */
3690 align
= GET_MODE_ALIGNMENT (mode
== VOIDmode
? word_mode
: mode
);
3691 #ifdef CONSTANT_ALIGNMENT
3693 tree type
= lang_hooks
.types
.type_for_mode (mode
, 0);
3694 if (type
!= NULL_TREE
)
3695 align
= CONSTANT_ALIGNMENT (make_tree (type
, x
), align
);
3699 pool
->offset
+= (align
/ BITS_PER_UNIT
) - 1;
3700 pool
->offset
&= ~ ((align
/ BITS_PER_UNIT
) - 1);
3703 desc
->constant
= copy_rtx (tmp
.constant
);
3704 desc
->offset
= pool
->offset
;
3707 desc
->align
= align
;
3708 desc
->labelno
= const_labelno
;
3711 pool
->offset
+= GET_MODE_SIZE (mode
);
3713 pool
->last
->next
= desc
;
3715 pool
->first
= pool
->last
= desc
;
3718 /* Create a string containing the label name, in LABEL. */
3719 ASM_GENERATE_INTERNAL_LABEL (label
, "LC", const_labelno
);
3722 /* Construct the SYMBOL_REF. Make sure to mark it as belonging to
3723 the constants pool. */
3724 if (use_object_blocks_p () && targetm
.use_blocks_for_constant_p (mode
, x
))
3726 section
*sect
= targetm
.asm_out
.select_rtx_section (mode
, x
, align
);
3727 symbol
= create_block_symbol (ggc_strdup (label
),
3728 get_block_for_section (sect
), -1);
3731 symbol
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (label
));
3733 SYMBOL_REF_FLAGS (symbol
) |= SYMBOL_FLAG_LOCAL
;
3734 CONSTANT_POOL_ADDRESS_P (symbol
) = 1;
3735 SET_SYMBOL_REF_CONSTANT (symbol
, desc
);
3737 /* Construct the MEM. */
3738 desc
->mem
= def
= gen_const_mem (mode
, symbol
);
3739 set_mem_attributes (def
, lang_hooks
.types
.type_for_mode (mode
, 0), 1);
3740 set_mem_align (def
, align
);
3742 /* If we're dropping a label to the constant pool, make sure we
3744 if (GET_CODE (x
) == LABEL_REF
)
3745 LABEL_PRESERVE_P (XEXP (x
, 0)) = 1;
3747 return copy_rtx (def
);
3750 /* Given a constant pool SYMBOL_REF, return the corresponding constant. */
3753 get_pool_constant (rtx addr
)
3755 return SYMBOL_REF_CONSTANT (addr
)->constant
;
3758 /* Given a constant pool SYMBOL_REF, return the corresponding constant
3759 and whether it has been output or not. */
3762 get_pool_constant_mark (rtx addr
, bool *pmarked
)
3764 struct constant_descriptor_rtx
*desc
;
3766 desc
= SYMBOL_REF_CONSTANT (addr
);
3767 *pmarked
= (desc
->mark
!= 0);
3768 return desc
->constant
;
3771 /* Similar, return the mode. */
3774 get_pool_mode (const_rtx addr
)
3776 return SYMBOL_REF_CONSTANT (addr
)->mode
;
3779 /* Return the size of the constant pool. */
3782 get_pool_size (void)
3784 return crtl
->varasm
.pool
->offset
;
3787 /* Worker function for output_constant_pool_1. Emit assembly for X
3788 in MODE with known alignment ALIGN. */
3791 output_constant_pool_2 (enum machine_mode mode
, rtx x
, unsigned int align
)
3793 switch (GET_MODE_CLASS (mode
))
3796 case MODE_DECIMAL_FLOAT
:
3800 gcc_assert (CONST_DOUBLE_AS_FLOAT_P (x
));
3801 REAL_VALUE_FROM_CONST_DOUBLE (r
, x
);
3802 assemble_real (r
, mode
, align
);
3807 case MODE_PARTIAL_INT
:
3812 assemble_integer (x
, GET_MODE_SIZE (mode
), align
, 1);
3815 case MODE_VECTOR_FLOAT
:
3816 case MODE_VECTOR_INT
:
3817 case MODE_VECTOR_FRACT
:
3818 case MODE_VECTOR_UFRACT
:
3819 case MODE_VECTOR_ACCUM
:
3820 case MODE_VECTOR_UACCUM
:
3823 enum machine_mode submode
= GET_MODE_INNER (mode
);
3824 unsigned int subalign
= MIN (align
, GET_MODE_BITSIZE (submode
));
3826 gcc_assert (GET_CODE (x
) == CONST_VECTOR
);
3827 units
= CONST_VECTOR_NUNITS (x
);
3829 for (i
= 0; i
< units
; i
++)
3831 rtx elt
= CONST_VECTOR_ELT (x
, i
);
3832 output_constant_pool_2 (submode
, elt
, i
? subalign
: align
);
3842 /* Worker function for output_constant_pool. Emit constant DESC,
3843 giving it ALIGN bits of alignment. */
3846 output_constant_pool_1 (struct constant_descriptor_rtx
*desc
,
3853 /* See if X is a LABEL_REF (or a CONST referring to a LABEL_REF)
3854 whose CODE_LABEL has been deleted. This can occur if a jump table
3855 is eliminated by optimization. If so, write a constant of zero
3856 instead. Note that this can also happen by turning the
3857 CODE_LABEL into a NOTE. */
3858 /* ??? This seems completely and utterly wrong. Certainly it's
3859 not true for NOTE_INSN_DELETED_LABEL, but I disbelieve proper
3860 functioning even with INSN_DELETED_P and friends. */
3863 switch (GET_CODE (tmp
))
3866 if (GET_CODE (XEXP (tmp
, 0)) != PLUS
3867 || GET_CODE (XEXP (XEXP (tmp
, 0), 0)) != LABEL_REF
)
3869 tmp
= XEXP (XEXP (tmp
, 0), 0);
3873 tmp
= XEXP (tmp
, 0);
3874 gcc_assert (!INSN_DELETED_P (tmp
));
3875 gcc_assert (!NOTE_P (tmp
)
3876 || NOTE_KIND (tmp
) != NOTE_INSN_DELETED
);
3883 #ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
3884 ASM_OUTPUT_SPECIAL_POOL_ENTRY (asm_out_file
, x
, desc
->mode
,
3885 align
, desc
->labelno
, done
);
3888 assemble_align (align
);
3890 /* Output the label. */
3891 targetm
.asm_out
.internal_label (asm_out_file
, "LC", desc
->labelno
);
3893 /* Output the data. */
3894 output_constant_pool_2 (desc
->mode
, x
, align
);
3896 /* Make sure all constants in SECTION_MERGE and not SECTION_STRINGS
3897 sections have proper size. */
3898 if (align
> GET_MODE_BITSIZE (desc
->mode
)
3900 && (in_section
->common
.flags
& SECTION_MERGE
))
3901 assemble_align (align
);
3903 #ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
3909 /* Given a SYMBOL_REF CURRENT_RTX, mark it and all constants it refers
3910 to as used. Emit referenced deferred strings. This function can
3911 be used with for_each_rtx to mark all SYMBOL_REFs in an rtx. */
3914 mark_constant (rtx
*current_rtx
, void *data ATTRIBUTE_UNUSED
)
3916 rtx x
= *current_rtx
;
3918 if (x
== NULL_RTX
|| GET_CODE (x
) != SYMBOL_REF
)
3921 if (CONSTANT_POOL_ADDRESS_P (x
))
3923 struct constant_descriptor_rtx
*desc
= SYMBOL_REF_CONSTANT (x
);
3924 if (desc
->mark
== 0)
3927 for_each_rtx (&desc
->constant
, mark_constant
, NULL
);
3930 else if (TREE_CONSTANT_POOL_ADDRESS_P (x
))
3932 tree decl
= SYMBOL_REF_DECL (x
);
3933 if (!TREE_ASM_WRITTEN (DECL_INITIAL (decl
)))
3935 n_deferred_constants
--;
3936 output_constant_def_contents (x
);
3943 /* Look through appropriate parts of INSN, marking all entries in the
3944 constant pool which are actually being used. Entries that are only
3945 referenced by other constants are also marked as used. Emit
3946 deferred strings that are used. */
3949 mark_constants (rtx insn
)
3954 /* Insns may appear inside a SEQUENCE. Only check the patterns of
3955 insns, not any notes that may be attached. We don't want to mark
3956 a constant just because it happens to appear in a REG_EQUIV note. */
3957 if (GET_CODE (PATTERN (insn
)) == SEQUENCE
)
3959 rtx seq
= PATTERN (insn
);
3960 int i
, n
= XVECLEN (seq
, 0);
3961 for (i
= 0; i
< n
; ++i
)
3963 rtx subinsn
= XVECEXP (seq
, 0, i
);
3964 if (INSN_P (subinsn
))
3965 for_each_rtx (&PATTERN (subinsn
), mark_constant
, NULL
);
3969 for_each_rtx (&PATTERN (insn
), mark_constant
, NULL
);
3972 /* Look through the instructions for this function, and mark all the
3973 entries in POOL which are actually being used. Emit deferred constants
3974 which have indeed been used. */
3977 mark_constant_pool (void)
3981 if (!crtl
->uses_const_pool
&& n_deferred_constants
== 0)
3984 for (insn
= get_insns (); insn
; insn
= NEXT_INSN (insn
))
3985 mark_constants (insn
);
3988 /* Write all the constants in POOL. */
3991 output_constant_pool_contents (struct rtx_constant_pool
*pool
)
3993 struct constant_descriptor_rtx
*desc
;
3995 for (desc
= pool
->first
; desc
; desc
= desc
->next
)
3998 /* If the constant is part of an object_block, make sure that
3999 the constant has been positioned within its block, but do not
4000 write out its definition yet. output_object_blocks will do
4002 if (SYMBOL_REF_HAS_BLOCK_INFO_P (desc
->sym
)
4003 && SYMBOL_REF_BLOCK (desc
->sym
))
4004 place_block_symbol (desc
->sym
);
4007 switch_to_section (targetm
.asm_out
.select_rtx_section
4008 (desc
->mode
, desc
->constant
, desc
->align
));
4009 output_constant_pool_1 (desc
, desc
->align
);
4014 /* Mark all constants that are used in the current function, then write
4015 out the function's private constant pool. */
4018 output_constant_pool (const char *fnname ATTRIBUTE_UNUSED
,
4019 tree fndecl ATTRIBUTE_UNUSED
)
4021 struct rtx_constant_pool
*pool
= crtl
->varasm
.pool
;
4023 /* It is possible for gcc to call force_const_mem and then to later
4024 discard the instructions which refer to the constant. In such a
4025 case we do not need to output the constant. */
4026 mark_constant_pool ();
4028 #ifdef ASM_OUTPUT_POOL_PROLOGUE
4029 ASM_OUTPUT_POOL_PROLOGUE (asm_out_file
, fnname
, fndecl
, pool
->offset
);
4032 output_constant_pool_contents (pool
);
4034 #ifdef ASM_OUTPUT_POOL_EPILOGUE
4035 ASM_OUTPUT_POOL_EPILOGUE (asm_out_file
, fnname
, fndecl
, pool
->offset
);
4039 /* Write the contents of the shared constant pool. */
4042 output_shared_constant_pool (void)
4044 output_constant_pool_contents (shared_constant_pool
);
4047 /* Determine what kind of relocations EXP may need. */
4050 compute_reloc_for_constant (tree exp
)
4052 int reloc
= 0, reloc2
;
4055 switch (TREE_CODE (exp
))
4059 /* Go inside any operations that get_inner_reference can handle and see
4060 if what's inside is a constant: no need to do anything here for
4061 addresses of variables or functions. */
4062 for (tem
= TREE_OPERAND (exp
, 0); handled_component_p (tem
);
4063 tem
= TREE_OPERAND (tem
, 0))
4066 if (TREE_CODE (tem
) == MEM_REF
4067 && TREE_CODE (TREE_OPERAND (tem
, 0)) == ADDR_EXPR
)
4069 reloc
= compute_reloc_for_constant (TREE_OPERAND (tem
, 0));
4073 if (!targetm
.binds_local_p (tem
))
4080 case POINTER_PLUS_EXPR
:
4081 reloc
= compute_reloc_for_constant (TREE_OPERAND (exp
, 0));
4082 reloc
|= compute_reloc_for_constant (TREE_OPERAND (exp
, 1));
4086 reloc
= compute_reloc_for_constant (TREE_OPERAND (exp
, 0));
4087 reloc2
= compute_reloc_for_constant (TREE_OPERAND (exp
, 1));
4088 /* The difference of two local labels is computable at link time. */
4089 if (reloc
== 1 && reloc2
== 1)
4096 case VIEW_CONVERT_EXPR
:
4097 reloc
= compute_reloc_for_constant (TREE_OPERAND (exp
, 0));
4102 unsigned HOST_WIDE_INT idx
;
4103 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp
), idx
, tem
)
4105 reloc
|= compute_reloc_for_constant (tem
);
4115 /* Find all the constants whose addresses are referenced inside of EXP,
4116 and make sure assembler code with a label has been output for each one.
4117 Indicate whether an ADDR_EXPR has been encountered. */
4120 output_addressed_constants (tree exp
)
4124 switch (TREE_CODE (exp
))
4128 /* Go inside any operations that get_inner_reference can handle and see
4129 if what's inside is a constant: no need to do anything here for
4130 addresses of variables or functions. */
4131 for (tem
= TREE_OPERAND (exp
, 0); handled_component_p (tem
);
4132 tem
= TREE_OPERAND (tem
, 0))
4135 /* If we have an initialized CONST_DECL, retrieve the initializer. */
4136 if (TREE_CODE (tem
) == CONST_DECL
&& DECL_INITIAL (tem
))
4137 tem
= DECL_INITIAL (tem
);
4139 if (CONSTANT_CLASS_P (tem
) || TREE_CODE (tem
) == CONSTRUCTOR
)
4140 output_constant_def (tem
, 0);
4142 if (TREE_CODE (tem
) == MEM_REF
)
4143 output_addressed_constants (TREE_OPERAND (tem
, 0));
4147 case POINTER_PLUS_EXPR
:
4149 output_addressed_constants (TREE_OPERAND (exp
, 1));
4153 case VIEW_CONVERT_EXPR
:
4154 output_addressed_constants (TREE_OPERAND (exp
, 0));
4159 unsigned HOST_WIDE_INT idx
;
4160 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp
), idx
, tem
)
4162 output_addressed_constants (tem
);
4171 /* Whether a constructor CTOR is a valid static constant initializer if all
4172 its elements are. This used to be internal to initializer_constant_valid_p
4173 and has been exposed to let other functions like categorize_ctor_elements
4174 evaluate the property while walking a constructor for other purposes. */
4177 constructor_static_from_elts_p (const_tree ctor
)
4179 return (TREE_CONSTANT (ctor
)
4180 && (TREE_CODE (TREE_TYPE (ctor
)) == UNION_TYPE
4181 || TREE_CODE (TREE_TYPE (ctor
)) == RECORD_TYPE
4182 || TREE_CODE (TREE_TYPE (ctor
)) == ARRAY_TYPE
));
4185 static tree
initializer_constant_valid_p_1 (tree value
, tree endtype
,
4188 /* A subroutine of initializer_constant_valid_p. VALUE is a MINUS_EXPR,
4189 PLUS_EXPR or POINTER_PLUS_EXPR. This looks for cases of VALUE
4190 which are valid when ENDTYPE is an integer of any size; in
4191 particular, this does not accept a pointer minus a constant. This
4192 returns null_pointer_node if the VALUE is an absolute constant
4193 which can be used to initialize a static variable. Otherwise it
4197 narrowing_initializer_constant_valid_p (tree value
, tree endtype
, tree
*cache
)
4201 if (!INTEGRAL_TYPE_P (endtype
))
4204 op0
= TREE_OPERAND (value
, 0);
4205 op1
= TREE_OPERAND (value
, 1);
4207 /* Like STRIP_NOPS except allow the operand mode to widen. This
4208 works around a feature of fold that simplifies (int)(p1 - p2) to
4209 ((int)p1 - (int)p2) under the theory that the narrower operation
4212 while (CONVERT_EXPR_P (op0
)
4213 || TREE_CODE (op0
) == NON_LVALUE_EXPR
)
4215 tree inner
= TREE_OPERAND (op0
, 0);
4216 if (inner
== error_mark_node
4217 || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner
)))
4218 || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op0
)))
4219 > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner
)))))
4224 while (CONVERT_EXPR_P (op1
)
4225 || TREE_CODE (op1
) == NON_LVALUE_EXPR
)
4227 tree inner
= TREE_OPERAND (op1
, 0);
4228 if (inner
== error_mark_node
4229 || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner
)))
4230 || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op1
)))
4231 > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner
)))))
4236 op0
= initializer_constant_valid_p_1 (op0
, endtype
, cache
);
4240 op1
= initializer_constant_valid_p_1 (op1
, endtype
,
4241 cache
? cache
+ 2 : NULL
);
4242 /* Both initializers must be known. */
4246 && (op0
== null_pointer_node
4247 || TREE_CODE (value
) == MINUS_EXPR
))
4248 return null_pointer_node
;
4250 /* Support differences between labels. */
4251 if (TREE_CODE (op0
) == LABEL_DECL
4252 && TREE_CODE (op1
) == LABEL_DECL
)
4253 return null_pointer_node
;
4255 if (TREE_CODE (op0
) == STRING_CST
4256 && TREE_CODE (op1
) == STRING_CST
4257 && operand_equal_p (op0
, op1
, 1))
4258 return null_pointer_node
;
4264 /* Helper function of initializer_constant_valid_p.
4265 Return nonzero if VALUE is a valid constant-valued expression
4266 for use in initializing a static variable; one that can be an
4267 element of a "constant" initializer.
4269 Return null_pointer_node if the value is absolute;
4270 if it is relocatable, return the variable that determines the relocation.
4271 We assume that VALUE has been folded as much as possible;
4272 therefore, we do not need to check for such things as
4273 arithmetic-combinations of integers.
4275 Use CACHE (pointer to 2 tree values) for caching if non-NULL. */
4278 initializer_constant_valid_p_1 (tree value
, tree endtype
, tree
*cache
)
4282 switch (TREE_CODE (value
))
4285 if (constructor_static_from_elts_p (value
))
4287 unsigned HOST_WIDE_INT idx
;
4289 bool absolute
= true;
4291 if (cache
&& cache
[0] == value
)
4293 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (value
), idx
, elt
)
4296 reloc
= initializer_constant_valid_p_1 (elt
, TREE_TYPE (elt
),
4303 cache
[1] = NULL_TREE
;
4307 if (reloc
!= null_pointer_node
)
4310 /* For a non-absolute relocation, there is no single
4311 variable that can be "the variable that determines the
4316 cache
[1] = absolute
? null_pointer_node
: error_mark_node
;
4318 return absolute
? null_pointer_node
: error_mark_node
;
4321 return TREE_STATIC (value
) ? null_pointer_node
: NULL_TREE
;
4329 return null_pointer_node
;
4334 tree op0
= staticp (TREE_OPERAND (value
, 0));
4337 /* "&(*a).f" is like unto pointer arithmetic. If "a" turns out
4338 to be a constant, this is old-skool offsetof-like nonsense. */
4339 if (TREE_CODE (op0
) == INDIRECT_REF
4340 && TREE_CONSTANT (TREE_OPERAND (op0
, 0)))
4341 return null_pointer_node
;
4342 /* Taking the address of a nested function involves a trampoline,
4343 unless we don't need or want one. */
4344 if (TREE_CODE (op0
) == FUNCTION_DECL
4345 && DECL_STATIC_CHAIN (op0
)
4346 && !TREE_NO_TRAMPOLINE (value
))
4348 /* "&{...}" requires a temporary to hold the constructed
4350 if (TREE_CODE (op0
) == CONSTRUCTOR
)
4356 case NON_LVALUE_EXPR
:
4357 return initializer_constant_valid_p_1 (TREE_OPERAND (value
, 0),
4360 case VIEW_CONVERT_EXPR
:
4362 tree src
= TREE_OPERAND (value
, 0);
4363 tree src_type
= TREE_TYPE (src
);
4364 tree dest_type
= TREE_TYPE (value
);
4366 /* Allow view-conversions from aggregate to non-aggregate type only
4367 if the bit pattern is fully preserved afterwards; otherwise, the
4368 RTL expander won't be able to apply a subsequent transformation
4369 to the underlying constructor. */
4370 if (AGGREGATE_TYPE_P (src_type
) && !AGGREGATE_TYPE_P (dest_type
))
4372 if (TYPE_MODE (endtype
) == TYPE_MODE (dest_type
))
4373 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4378 /* Allow all other kinds of view-conversion. */
4379 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4384 tree src
= TREE_OPERAND (value
, 0);
4385 tree src_type
= TREE_TYPE (src
);
4386 tree dest_type
= TREE_TYPE (value
);
4388 /* Allow conversions between pointer types, floating-point
4389 types, and offset types. */
4390 if ((POINTER_TYPE_P (dest_type
) && POINTER_TYPE_P (src_type
))
4391 || (FLOAT_TYPE_P (dest_type
) && FLOAT_TYPE_P (src_type
))
4392 || (TREE_CODE (dest_type
) == OFFSET_TYPE
4393 && TREE_CODE (src_type
) == OFFSET_TYPE
))
4394 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4396 /* Allow length-preserving conversions between integer types. */
4397 if (INTEGRAL_TYPE_P (dest_type
) && INTEGRAL_TYPE_P (src_type
)
4398 && (TYPE_PRECISION (dest_type
) == TYPE_PRECISION (src_type
)))
4399 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4401 /* Allow conversions between other integer types only if
4403 if (INTEGRAL_TYPE_P (dest_type
) && INTEGRAL_TYPE_P (src_type
))
4405 tree inner
= initializer_constant_valid_p_1 (src
, endtype
, cache
);
4406 if (inner
== null_pointer_node
)
4407 return null_pointer_node
;
4411 /* Allow (int) &foo provided int is as wide as a pointer. */
4412 if (INTEGRAL_TYPE_P (dest_type
) && POINTER_TYPE_P (src_type
)
4413 && (TYPE_PRECISION (dest_type
) >= TYPE_PRECISION (src_type
)))
4414 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4416 /* Likewise conversions from int to pointers, but also allow
4417 conversions from 0. */
4418 if ((POINTER_TYPE_P (dest_type
)
4419 || TREE_CODE (dest_type
) == OFFSET_TYPE
)
4420 && INTEGRAL_TYPE_P (src_type
))
4422 if (TREE_CODE (src
) == INTEGER_CST
4423 && TYPE_PRECISION (dest_type
) >= TYPE_PRECISION (src_type
))
4424 return null_pointer_node
;
4425 if (integer_zerop (src
))
4426 return null_pointer_node
;
4427 else if (TYPE_PRECISION (dest_type
) <= TYPE_PRECISION (src_type
))
4428 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4431 /* Allow conversions to struct or union types if the value
4433 if (TREE_CODE (dest_type
) == RECORD_TYPE
4434 || TREE_CODE (dest_type
) == UNION_TYPE
)
4435 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4439 case POINTER_PLUS_EXPR
:
4441 /* Any valid floating-point constants will have been folded by now;
4442 with -frounding-math we hit this with addition of two constants. */
4443 if (TREE_CODE (endtype
) == REAL_TYPE
)
4445 if (cache
&& cache
[0] == value
)
4447 if (! INTEGRAL_TYPE_P (endtype
)
4448 || TYPE_PRECISION (endtype
) >= TYPE_PRECISION (TREE_TYPE (value
)))
4450 tree ncache
[4] = { NULL_TREE
, NULL_TREE
, NULL_TREE
, NULL_TREE
};
4452 = initializer_constant_valid_p_1 (TREE_OPERAND (value
, 0),
4455 = initializer_constant_valid_p_1 (TREE_OPERAND (value
, 1),
4456 endtype
, ncache
+ 2);
4457 /* If either term is absolute, use the other term's relocation. */
4458 if (valid0
== null_pointer_node
)
4460 else if (valid1
== null_pointer_node
)
4462 /* Support narrowing pointer differences. */
4464 ret
= narrowing_initializer_constant_valid_p (value
, endtype
,
4468 /* Support narrowing pointer differences. */
4469 ret
= narrowing_initializer_constant_valid_p (value
, endtype
, NULL
);
4478 if (TREE_CODE (endtype
) == REAL_TYPE
)
4480 if (cache
&& cache
[0] == value
)
4482 if (! INTEGRAL_TYPE_P (endtype
)
4483 || TYPE_PRECISION (endtype
) >= TYPE_PRECISION (TREE_TYPE (value
)))
4485 tree ncache
[4] = { NULL_TREE
, NULL_TREE
, NULL_TREE
, NULL_TREE
};
4487 = initializer_constant_valid_p_1 (TREE_OPERAND (value
, 0),
4490 = initializer_constant_valid_p_1 (TREE_OPERAND (value
, 1),
4491 endtype
, ncache
+ 2);
4492 /* Win if second argument is absolute. */
4493 if (valid1
== null_pointer_node
)
4495 /* Win if both arguments have the same relocation.
4496 Then the value is absolute. */
4497 else if (valid0
== valid1
&& valid0
!= 0)
4498 ret
= null_pointer_node
;
4499 /* Since GCC guarantees that string constants are unique in the
4500 generated code, a subtraction between two copies of the same
4501 constant string is absolute. */
4502 else if (valid0
&& TREE_CODE (valid0
) == STRING_CST
4503 && valid1
&& TREE_CODE (valid1
) == STRING_CST
4504 && operand_equal_p (valid0
, valid1
, 1))
4505 ret
= null_pointer_node
;
4506 /* Support narrowing differences. */
4508 ret
= narrowing_initializer_constant_valid_p (value
, endtype
,
4512 /* Support narrowing differences. */
4513 ret
= narrowing_initializer_constant_valid_p (value
, endtype
, NULL
);
4528 /* Return nonzero if VALUE is a valid constant-valued expression
4529 for use in initializing a static variable; one that can be an
4530 element of a "constant" initializer.
4532 Return null_pointer_node if the value is absolute;
4533 if it is relocatable, return the variable that determines the relocation.
4534 We assume that VALUE has been folded as much as possible;
4535 therefore, we do not need to check for such things as
4536 arithmetic-combinations of integers. */
4538 initializer_constant_valid_p (tree value
, tree endtype
)
4540 return initializer_constant_valid_p_1 (value
, endtype
, NULL
);
4543 /* Return true if VALUE is a valid constant-valued expression
4544 for use in initializing a static bit-field; one that can be
4545 an element of a "constant" initializer. */
4548 initializer_constant_valid_for_bitfield_p (tree value
)
4550 /* For bitfields we support integer constants or possibly nested aggregates
4552 switch (TREE_CODE (value
))
4556 unsigned HOST_WIDE_INT idx
;
4559 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (value
), idx
, elt
)
4560 if (!initializer_constant_valid_for_bitfield_p (elt
))
4569 case VIEW_CONVERT_EXPR
:
4570 case NON_LVALUE_EXPR
:
4572 initializer_constant_valid_for_bitfield_p (TREE_OPERAND (value
, 0));
4581 /* output_constructor outer state of relevance in recursive calls, typically
4582 for nested aggregate bitfields. */
4585 unsigned int bit_offset
; /* current position in ... */
4586 int byte
; /* ... the outer byte buffer. */
4589 static unsigned HOST_WIDE_INT
4590 output_constructor (tree
, unsigned HOST_WIDE_INT
, unsigned int,
4593 /* Output assembler code for constant EXP, with no label.
4594 This includes the pseudo-op such as ".int" or ".byte", and a newline.
4595 Assumes output_addressed_constants has been done on EXP already.
4597 Generate at least SIZE bytes of assembler data, padding at the end
4598 with zeros if necessary. SIZE must always be specified. The returned
4599 value is the actual number of bytes of assembler data generated, which
4600 may be bigger than SIZE if the object contains a variable length field.
4602 SIZE is important for structure constructors,
4603 since trailing members may have been omitted from the constructor.
4604 It is also important for initialization of arrays from string constants
4605 since the full length of the string constant might not be wanted.
4606 It is also needed for initialization of unions, where the initializer's
4607 type is just one member, and that may not be as long as the union.
4609 There a case in which we would fail to output exactly SIZE bytes:
4610 for a structure constructor that wants to produce more than SIZE bytes.
4611 But such constructors will never be generated for any possible input.
4613 ALIGN is the alignment of the data in bits. */
4615 static unsigned HOST_WIDE_INT
4616 output_constant (tree exp
, unsigned HOST_WIDE_INT size
, unsigned int align
)
4618 enum tree_code code
;
4619 unsigned HOST_WIDE_INT thissize
;
4621 if (size
== 0 || flag_syntax_only
)
4624 /* See if we're trying to initialize a pointer in a non-default mode
4625 to the address of some declaration somewhere. If the target says
4626 the mode is valid for pointers, assume the target has a way of
4628 if (TREE_CODE (exp
) == NOP_EXPR
4629 && POINTER_TYPE_P (TREE_TYPE (exp
))
4630 && targetm
.addr_space
.valid_pointer_mode
4631 (TYPE_MODE (TREE_TYPE (exp
)),
4632 TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp
)))))
4634 tree saved_type
= TREE_TYPE (exp
);
4636 /* Peel off any intermediate conversions-to-pointer for valid
4638 while (TREE_CODE (exp
) == NOP_EXPR
4639 && POINTER_TYPE_P (TREE_TYPE (exp
))
4640 && targetm
.addr_space
.valid_pointer_mode
4641 (TYPE_MODE (TREE_TYPE (exp
)),
4642 TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp
)))))
4643 exp
= TREE_OPERAND (exp
, 0);
4645 /* If what we're left with is the address of something, we can
4646 convert the address to the final type and output it that
4648 if (TREE_CODE (exp
) == ADDR_EXPR
)
4649 exp
= build1 (ADDR_EXPR
, saved_type
, TREE_OPERAND (exp
, 0));
4650 /* Likewise for constant ints. */
4651 else if (TREE_CODE (exp
) == INTEGER_CST
)
4652 exp
= wide_int_to_tree (saved_type
, exp
);
4656 /* Eliminate any conversions since we'll be outputting the underlying
4658 while (CONVERT_EXPR_P (exp
)
4659 || TREE_CODE (exp
) == NON_LVALUE_EXPR
4660 || TREE_CODE (exp
) == VIEW_CONVERT_EXPR
)
4662 HOST_WIDE_INT type_size
= int_size_in_bytes (TREE_TYPE (exp
));
4663 HOST_WIDE_INT op_size
= int_size_in_bytes (TREE_TYPE (TREE_OPERAND (exp
, 0)));
4665 /* Make sure eliminating the conversion is really a no-op, except with
4666 VIEW_CONVERT_EXPRs to allow for wild Ada unchecked conversions and
4667 union types to allow for Ada unchecked unions. */
4668 if (type_size
> op_size
4669 && TREE_CODE (exp
) != VIEW_CONVERT_EXPR
4670 && TREE_CODE (TREE_TYPE (exp
)) != UNION_TYPE
)
4671 /* Keep the conversion. */
4674 exp
= TREE_OPERAND (exp
, 0);
4677 code
= TREE_CODE (TREE_TYPE (exp
));
4678 thissize
= int_size_in_bytes (TREE_TYPE (exp
));
4680 /* Allow a constructor with no elements for any data type.
4681 This means to fill the space with zeros. */
4682 if (TREE_CODE (exp
) == CONSTRUCTOR
4683 && vec_safe_is_empty (CONSTRUCTOR_ELTS (exp
)))
4685 assemble_zeros (size
);
4689 if (TREE_CODE (exp
) == FDESC_EXPR
)
4691 #ifdef ASM_OUTPUT_FDESC
4692 HOST_WIDE_INT part
= tree_to_shwi (TREE_OPERAND (exp
, 1));
4693 tree decl
= TREE_OPERAND (exp
, 0);
4694 ASM_OUTPUT_FDESC (asm_out_file
, decl
, part
);
4701 /* Now output the underlying data. If we've handling the padding, return.
4702 Otherwise, break and ensure SIZE is the size written. */
4709 case REFERENCE_TYPE
:
4711 case FIXED_POINT_TYPE
:
4713 if (! assemble_integer (expand_expr (exp
, NULL_RTX
, VOIDmode
,
4714 EXPAND_INITIALIZER
),
4715 MIN (size
, thissize
), align
, 0))
4716 error ("initializer for integer/fixed-point value is too complicated");
4720 if (TREE_CODE (exp
) != REAL_CST
)
4721 error ("initializer for floating value is not a floating constant");
4723 assemble_real (TREE_REAL_CST (exp
), TYPE_MODE (TREE_TYPE (exp
)), align
);
4727 output_constant (TREE_REALPART (exp
), thissize
/ 2, align
);
4728 output_constant (TREE_IMAGPART (exp
), thissize
/ 2,
4729 min_align (align
, BITS_PER_UNIT
* (thissize
/ 2)));
4734 switch (TREE_CODE (exp
))
4737 return output_constructor (exp
, size
, align
, NULL
);
4740 = MIN ((unsigned HOST_WIDE_INT
)TREE_STRING_LENGTH (exp
), size
);
4741 assemble_string (TREE_STRING_POINTER (exp
), thissize
);
4745 enum machine_mode inner
= TYPE_MODE (TREE_TYPE (TREE_TYPE (exp
)));
4746 unsigned int nalign
= MIN (align
, GET_MODE_ALIGNMENT (inner
));
4747 int elt_size
= GET_MODE_SIZE (inner
);
4748 output_constant (VECTOR_CST_ELT (exp
, 0), elt_size
, align
);
4749 thissize
= elt_size
;
4750 for (unsigned int i
= 1; i
< VECTOR_CST_NELTS (exp
); i
++)
4752 output_constant (VECTOR_CST_ELT (exp
, i
), elt_size
, nalign
);
4753 thissize
+= elt_size
;
4764 gcc_assert (TREE_CODE (exp
) == CONSTRUCTOR
);
4765 return output_constructor (exp
, size
, align
, NULL
);
4774 if (size
> thissize
)
4775 assemble_zeros (size
- thissize
);
4781 /* Subroutine of output_constructor, used for computing the size of
4782 arrays of unspecified length. VAL must be a CONSTRUCTOR of an array
4783 type with an unspecified upper bound. */
4785 static unsigned HOST_WIDE_INT
4786 array_size_for_constructor (tree val
)
4789 unsigned HOST_WIDE_INT cnt
;
4790 tree index
, value
, tmp
;
4793 /* This code used to attempt to handle string constants that are not
4794 arrays of single-bytes, but nothing else does, so there's no point in
4796 if (TREE_CODE (val
) == STRING_CST
)
4797 return TREE_STRING_LENGTH (val
);
4799 max_index
= NULL_TREE
;
4800 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (val
), cnt
, index
, value
)
4802 if (TREE_CODE (index
) == RANGE_EXPR
)
4803 index
= TREE_OPERAND (index
, 1);
4804 if (max_index
== NULL_TREE
|| tree_int_cst_lt (max_index
, index
))
4808 if (max_index
== NULL_TREE
)
4811 /* Compute the total number of array elements. */
4812 tmp
= TYPE_MIN_VALUE (TYPE_DOMAIN (TREE_TYPE (val
)));
4813 i
= wi::to_offset (max_index
) - wi::to_offset (tmp
) + 1;
4815 /* Multiply by the array element unit size to find number of bytes. */
4816 i
*= wi::to_offset (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (val
))));
4818 gcc_assert (wi::fits_uhwi_p (i
));
4819 return i
.to_uhwi ();
4822 /* Other datastructures + helpers for output_constructor. */
4824 /* output_constructor local state to support interaction with helpers. */
4828 /* Received arguments. */
4829 tree exp
; /* Constructor expression. */
4830 tree type
; /* Type of constructor expression. */
4831 unsigned HOST_WIDE_INT size
; /* # bytes to output - pad if necessary. */
4832 unsigned int align
; /* Known initial alignment. */
4833 tree min_index
; /* Lower bound if specified for an array. */
4835 /* Output processing state. */
4836 HOST_WIDE_INT total_bytes
; /* # bytes output so far / current position. */
4837 int byte
; /* Part of a bitfield byte yet to be output. */
4838 int last_relative_index
; /* Implicit or explicit index of the last
4839 array element output within a bitfield. */
4840 bool byte_buffer_in_use
; /* Whether BYTE is in use. */
4842 /* Current element. */
4843 tree field
; /* Current field decl in a record. */
4844 tree val
; /* Current element value. */
4845 tree index
; /* Current element index. */
4849 /* Helper for output_constructor. From the current LOCAL state, output a
4850 RANGE_EXPR element. */
4853 output_constructor_array_range (oc_local_state
*local
)
4855 unsigned HOST_WIDE_INT fieldsize
4856 = int_size_in_bytes (TREE_TYPE (local
->type
));
4858 HOST_WIDE_INT lo_index
4859 = tree_to_shwi (TREE_OPERAND (local
->index
, 0));
4860 HOST_WIDE_INT hi_index
4861 = tree_to_shwi (TREE_OPERAND (local
->index
, 1));
4862 HOST_WIDE_INT index
;
4865 = min_align (local
->align
, fieldsize
* BITS_PER_UNIT
);
4867 for (index
= lo_index
; index
<= hi_index
; index
++)
4869 /* Output the element's initial value. */
4870 if (local
->val
== NULL_TREE
)
4871 assemble_zeros (fieldsize
);
4873 fieldsize
= output_constant (local
->val
, fieldsize
, align2
);
4875 /* Count its size. */
4876 local
->total_bytes
+= fieldsize
;
4880 /* Helper for output_constructor. From the current LOCAL state, output a
4881 field element that is not true bitfield or part of an outer one. */
4884 output_constructor_regular_field (oc_local_state
*local
)
4886 /* Field size and position. Since this structure is static, we know the
4887 positions are constant. */
4888 unsigned HOST_WIDE_INT fieldsize
;
4889 HOST_WIDE_INT fieldpos
;
4891 unsigned int align2
;
4893 if (local
->index
!= NULL_TREE
)
4895 /* Perform the index calculation in modulo arithmetic but
4896 sign-extend the result because Ada has negative DECL_FIELD_OFFSETs
4897 but we are using an unsigned sizetype. */
4898 unsigned prec
= TYPE_PRECISION (sizetype
);
4899 offset_int idx
= wi::sext (wi::to_offset (local
->index
)
4900 - wi::to_offset (local
->min_index
), prec
);
4901 fieldpos
= (idx
* wi::to_offset (TYPE_SIZE_UNIT (TREE_TYPE (local
->val
))))
4904 else if (local
->field
!= NULL_TREE
)
4905 fieldpos
= int_byte_position (local
->field
);
4909 /* Output any buffered-up bit-fields preceding this element. */
4910 if (local
->byte_buffer_in_use
)
4912 assemble_integer (GEN_INT (local
->byte
), 1, BITS_PER_UNIT
, 1);
4913 local
->total_bytes
++;
4914 local
->byte_buffer_in_use
= false;
4917 /* Advance to offset of this element.
4918 Note no alignment needed in an array, since that is guaranteed
4919 if each element has the proper size. */
4920 if ((local
->field
!= NULL_TREE
|| local
->index
!= NULL_TREE
)
4921 && fieldpos
> local
->total_bytes
)
4923 assemble_zeros (fieldpos
- local
->total_bytes
);
4924 local
->total_bytes
= fieldpos
;
4927 /* Find the alignment of this element. */
4928 align2
= min_align (local
->align
, BITS_PER_UNIT
* fieldpos
);
4930 /* Determine size this element should occupy. */
4935 /* If this is an array with an unspecified upper bound,
4936 the initializer determines the size. */
4937 /* ??? This ought to only checked if DECL_SIZE_UNIT is NULL,
4938 but we cannot do this until the deprecated support for
4939 initializing zero-length array members is removed. */
4940 if (TREE_CODE (TREE_TYPE (local
->field
)) == ARRAY_TYPE
4941 && TYPE_DOMAIN (TREE_TYPE (local
->field
))
4942 && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (local
->field
))))
4944 fieldsize
= array_size_for_constructor (local
->val
);
4945 /* Given a non-empty initialization, this field had
4947 gcc_assert (!fieldsize
|| !DECL_CHAIN (local
->field
));
4950 fieldsize
= tree_to_uhwi (DECL_SIZE_UNIT (local
->field
));
4953 fieldsize
= int_size_in_bytes (TREE_TYPE (local
->type
));
4955 /* Output the element's initial value. */
4956 if (local
->val
== NULL_TREE
)
4957 assemble_zeros (fieldsize
);
4959 fieldsize
= output_constant (local
->val
, fieldsize
, align2
);
4961 /* Count its size. */
4962 local
->total_bytes
+= fieldsize
;
4965 /* Helper for output_constructor. From the LOCAL state, output an element
4966 that is a true bitfield or part of an outer one. BIT_OFFSET is the offset
4967 from the start of a possibly ongoing outer byte buffer. */
4970 output_constructor_bitfield (oc_local_state
*local
, unsigned int bit_offset
)
4972 /* Bit size of this element. */
4973 HOST_WIDE_INT ebitsize
4975 ? tree_to_uhwi (DECL_SIZE (local
->field
))
4976 : tree_to_uhwi (TYPE_SIZE (TREE_TYPE (local
->type
))));
4978 /* Relative index of this element if this is an array component. */
4979 HOST_WIDE_INT relative_index
4982 ? (tree_to_shwi (local
->index
)
4983 - tree_to_shwi (local
->min_index
))
4984 : local
->last_relative_index
+ 1)
4987 /* Bit position of this element from the start of the containing
4989 HOST_WIDE_INT constructor_relative_ebitpos
4991 ? int_bit_position (local
->field
)
4992 : ebitsize
* relative_index
);
4994 /* Bit position of this element from the start of a possibly ongoing
4995 outer byte buffer. */
4996 HOST_WIDE_INT byte_relative_ebitpos
4997 = bit_offset
+ constructor_relative_ebitpos
;
4999 /* From the start of a possibly ongoing outer byte buffer, offsets to
5000 the first bit of this element and to the first bit past the end of
5002 HOST_WIDE_INT next_offset
= byte_relative_ebitpos
;
5003 HOST_WIDE_INT end_offset
= byte_relative_ebitpos
+ ebitsize
;
5005 local
->last_relative_index
= relative_index
;
5007 if (local
->val
== NULL_TREE
)
5008 local
->val
= integer_zero_node
;
5010 while (TREE_CODE (local
->val
) == VIEW_CONVERT_EXPR
5011 || TREE_CODE (local
->val
) == NON_LVALUE_EXPR
)
5012 local
->val
= TREE_OPERAND (local
->val
, 0);
5014 if (TREE_CODE (local
->val
) != INTEGER_CST
5015 && TREE_CODE (local
->val
) != CONSTRUCTOR
)
5017 error ("invalid initial value for member %qE", DECL_NAME (local
->field
));
5021 /* If this field does not start in this (or next) byte, skip some bytes. */
5022 if (next_offset
/ BITS_PER_UNIT
!= local
->total_bytes
)
5024 /* Output remnant of any bit field in previous bytes. */
5025 if (local
->byte_buffer_in_use
)
5027 assemble_integer (GEN_INT (local
->byte
), 1, BITS_PER_UNIT
, 1);
5028 local
->total_bytes
++;
5029 local
->byte_buffer_in_use
= false;
5032 /* If still not at proper byte, advance to there. */
5033 if (next_offset
/ BITS_PER_UNIT
!= local
->total_bytes
)
5035 gcc_assert (next_offset
/ BITS_PER_UNIT
>= local
->total_bytes
);
5036 assemble_zeros (next_offset
/ BITS_PER_UNIT
- local
->total_bytes
);
5037 local
->total_bytes
= next_offset
/ BITS_PER_UNIT
;
5041 /* Set up the buffer if necessary. */
5042 if (!local
->byte_buffer_in_use
)
5046 local
->byte_buffer_in_use
= true;
5049 /* If this is nested constructor, recurse passing the bit offset and the
5050 pending data, then retrieve the new pending data afterwards. */
5051 if (TREE_CODE (local
->val
) == CONSTRUCTOR
)
5053 oc_outer_state temp_state
;
5054 temp_state
.bit_offset
= next_offset
% BITS_PER_UNIT
;
5055 temp_state
.byte
= local
->byte
;
5057 += output_constructor (local
->val
, 0, 0, &temp_state
);
5058 local
->byte
= temp_state
.byte
;
5062 /* Otherwise, we must split the element into pieces that fall within
5063 separate bytes, and combine each byte with previous or following
5065 while (next_offset
< end_offset
)
5069 HOST_WIDE_INT value
;
5070 HOST_WIDE_INT next_byte
= next_offset
/ BITS_PER_UNIT
;
5071 HOST_WIDE_INT next_bit
= next_offset
% BITS_PER_UNIT
;
5073 /* Advance from byte to byte within this element when necessary. */
5074 while (next_byte
!= local
->total_bytes
)
5076 assemble_integer (GEN_INT (local
->byte
), 1, BITS_PER_UNIT
, 1);
5077 local
->total_bytes
++;
5081 /* Number of bits we can process at once (all part of the same byte). */
5082 this_time
= MIN (end_offset
- next_offset
, BITS_PER_UNIT
- next_bit
);
5083 if (BYTES_BIG_ENDIAN
)
5085 /* On big-endian machine, take the most significant bits (of the
5086 bits that are significant) first and put them into bytes from
5087 the most significant end. */
5088 shift
= end_offset
- next_offset
- this_time
;
5090 /* Don't try to take a bunch of bits that cross
5091 the word boundary in the INTEGER_CST. We can
5092 only select bits from one element. */
5093 if ((shift
/ HOST_BITS_PER_WIDE_INT
)
5094 != ((shift
+ this_time
- 1) / HOST_BITS_PER_WIDE_INT
))
5096 const int end
= shift
+ this_time
- 1;
5097 shift
= end
& -HOST_BITS_PER_WIDE_INT
;
5098 this_time
= end
- shift
+ 1;
5101 /* Now get the bits from the appropriate constant word. */
5102 value
= TREE_INT_CST_ELT (local
->val
, shift
/ HOST_BITS_PER_WIDE_INT
);
5103 shift
= shift
& (HOST_BITS_PER_WIDE_INT
- 1);
5105 /* Get the result. This works only when:
5106 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */
5107 local
->byte
|= (((value
>> shift
)
5108 & (((HOST_WIDE_INT
) 2 << (this_time
- 1)) - 1))
5109 << (BITS_PER_UNIT
- this_time
- next_bit
));
5113 /* On little-endian machines, take the least significant bits of
5114 the value first and pack them starting at the least significant
5115 bits of the bytes. */
5116 shift
= next_offset
- byte_relative_ebitpos
;
5118 /* Don't try to take a bunch of bits that cross
5119 the word boundary in the INTEGER_CST. We can
5120 only select bits from one element. */
5121 if ((shift
/ HOST_BITS_PER_WIDE_INT
)
5122 != ((shift
+ this_time
- 1) / HOST_BITS_PER_WIDE_INT
))
5124 = HOST_BITS_PER_WIDE_INT
- (shift
& (HOST_BITS_PER_WIDE_INT
- 1));
5126 /* Now get the bits from the appropriate constant word. */
5127 value
= TREE_INT_CST_ELT (local
->val
, shift
/ HOST_BITS_PER_WIDE_INT
);
5128 shift
= shift
& (HOST_BITS_PER_WIDE_INT
- 1);
5130 /* Get the result. This works only when:
5131 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */
5132 local
->byte
|= (((value
>> shift
)
5133 & (((HOST_WIDE_INT
) 2 << (this_time
- 1)) - 1))
5137 next_offset
+= this_time
;
5138 local
->byte_buffer_in_use
= true;
5142 /* Subroutine of output_constant, used for CONSTRUCTORs (aggregate constants).
5143 Generate at least SIZE bytes, padding if necessary. OUTER designates the
5144 caller output state of relevance in recursive invocations. */
5146 static unsigned HOST_WIDE_INT
5147 output_constructor (tree exp
, unsigned HOST_WIDE_INT size
,
5148 unsigned int align
, oc_outer_state
*outer
)
5150 unsigned HOST_WIDE_INT cnt
;
5151 constructor_elt
*ce
;
5153 oc_local_state local
;
5155 /* Setup our local state to communicate with helpers. */
5157 local
.type
= TREE_TYPE (exp
);
5159 local
.align
= align
;
5160 if (TREE_CODE (local
.type
) == ARRAY_TYPE
&& TYPE_DOMAIN (local
.type
))
5161 local
.min_index
= TYPE_MIN_VALUE (TYPE_DOMAIN (local
.type
));
5163 local
.min_index
= NULL_TREE
;
5165 local
.total_bytes
= 0;
5166 local
.byte_buffer_in_use
= outer
!= NULL
;
5167 local
.byte
= outer
? outer
->byte
: 0;
5168 local
.last_relative_index
= -1;
5170 gcc_assert (HOST_BITS_PER_WIDE_INT
>= BITS_PER_UNIT
);
5172 /* As CE goes through the elements of the constant, FIELD goes through the
5173 structure fields if the constant is a structure. If the constant is a
5174 union, we override this by getting the field from the TREE_LIST element.
5175 But the constant could also be an array. Then FIELD is zero.
5177 There is always a maximum of one element in the chain LINK for unions
5178 (even if the initializer in a source program incorrectly contains
5181 if (TREE_CODE (local
.type
) == RECORD_TYPE
)
5182 local
.field
= TYPE_FIELDS (local
.type
);
5184 local
.field
= NULL_TREE
;
5187 vec_safe_iterate (CONSTRUCTOR_ELTS (exp
), cnt
, &ce
);
5188 cnt
++, local
.field
= local
.field
? DECL_CHAIN (local
.field
) : 0)
5190 local
.val
= ce
->value
;
5191 local
.index
= NULL_TREE
;
5193 /* The element in a union constructor specifies the proper field
5195 if (RECORD_OR_UNION_TYPE_P (local
.type
) && ce
->index
!= NULL_TREE
)
5196 local
.field
= ce
->index
;
5198 else if (TREE_CODE (local
.type
) == ARRAY_TYPE
)
5199 local
.index
= ce
->index
;
5201 if (local
.field
&& flag_verbose_asm
)
5202 fprintf (asm_out_file
, "%s %s:\n",
5204 DECL_NAME (local
.field
)
5205 ? IDENTIFIER_POINTER (DECL_NAME (local
.field
))
5208 /* Eliminate the marker that makes a cast not be an lvalue. */
5209 if (local
.val
!= NULL_TREE
)
5210 STRIP_NOPS (local
.val
);
5212 /* Output the current element, using the appropriate helper ... */
5214 /* For an array slice not part of an outer bitfield. */
5216 && local
.index
!= NULL_TREE
5217 && TREE_CODE (local
.index
) == RANGE_EXPR
)
5218 output_constructor_array_range (&local
);
5220 /* For a field that is neither a true bitfield nor part of an outer one,
5221 known to be at least byte aligned and multiple-of-bytes long. */
5223 && (local
.field
== NULL_TREE
5224 || !CONSTRUCTOR_BITFIELD_P (local
.field
)))
5225 output_constructor_regular_field (&local
);
5227 /* For a true bitfield or part of an outer one. Only INTEGER_CSTs are
5228 supported for scalar fields, so we may need to convert first. */
5231 if (TREE_CODE (local
.val
) == REAL_CST
)
5233 = fold_unary (VIEW_CONVERT_EXPR
,
5234 build_nonstandard_integer_type
5235 (TYPE_PRECISION (TREE_TYPE (local
.val
)), 0),
5237 output_constructor_bitfield (&local
, outer
? outer
->bit_offset
: 0);
5241 /* If we are not at toplevel, save the pending data for our caller.
5242 Otherwise output the pending data and padding zeros as needed. */
5244 outer
->byte
= local
.byte
;
5247 if (local
.byte_buffer_in_use
)
5249 assemble_integer (GEN_INT (local
.byte
), 1, BITS_PER_UNIT
, 1);
5250 local
.total_bytes
++;
5253 if ((unsigned HOST_WIDE_INT
)local
.total_bytes
< local
.size
)
5255 assemble_zeros (local
.size
- local
.total_bytes
);
5256 local
.total_bytes
= local
.size
;
5260 return local
.total_bytes
;
5263 /* Mark DECL as weak. */
5266 mark_weak (tree decl
)
5268 DECL_WEAK (decl
) = 1;
5270 if (DECL_RTL_SET_P (decl
)
5271 && MEM_P (DECL_RTL (decl
))
5272 && XEXP (DECL_RTL (decl
), 0)
5273 && GET_CODE (XEXP (DECL_RTL (decl
), 0)) == SYMBOL_REF
)
5274 SYMBOL_REF_WEAK (XEXP (DECL_RTL (decl
), 0)) = 1;
5277 /* Merge weak status between NEWDECL and OLDDECL. */
5280 merge_weak (tree newdecl
, tree olddecl
)
5282 if (DECL_WEAK (newdecl
) == DECL_WEAK (olddecl
))
5284 if (DECL_WEAK (newdecl
) && TARGET_SUPPORTS_WEAK
)
5287 /* We put the NEWDECL on the weak_decls list at some point
5288 and OLDDECL as well. Keep just OLDDECL on the list. */
5289 for (pwd
= &weak_decls
; *pwd
; pwd
= &TREE_CHAIN (*pwd
))
5290 if (TREE_VALUE (*pwd
) == newdecl
)
5292 *pwd
= TREE_CHAIN (*pwd
);
5299 if (DECL_WEAK (newdecl
))
5303 /* NEWDECL is weak, but OLDDECL is not. */
5305 /* If we already output the OLDDECL, we're in trouble; we can't
5306 go back and make it weak. This should never happen in
5307 unit-at-a-time compilation. */
5308 gcc_assert (!TREE_ASM_WRITTEN (olddecl
));
5310 /* If we've already generated rtl referencing OLDDECL, we may
5311 have done so in a way that will not function properly with
5312 a weak symbol. Again in unit-at-a-time this should be
5314 gcc_assert (!TREE_USED (olddecl
)
5315 || !TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (olddecl
)));
5317 if (TARGET_SUPPORTS_WEAK
)
5319 /* We put the NEWDECL on the weak_decls list at some point.
5320 Replace it with the OLDDECL. */
5321 for (wd
= weak_decls
; wd
; wd
= TREE_CHAIN (wd
))
5322 if (TREE_VALUE (wd
) == newdecl
)
5324 TREE_VALUE (wd
) = olddecl
;
5327 /* We may not find the entry on the list. If NEWDECL is a
5328 weak alias, then we will have already called
5329 globalize_decl to remove the entry; in that case, we do
5330 not need to do anything. */
5333 /* Make the OLDDECL weak; it's OLDDECL that we'll be keeping. */
5334 mark_weak (olddecl
);
5337 /* OLDDECL was weak, but NEWDECL was not explicitly marked as
5338 weak. Just update NEWDECL to indicate that it's weak too. */
5339 mark_weak (newdecl
);
5342 /* Declare DECL to be a weak symbol. */
5345 declare_weak (tree decl
)
5347 gcc_assert (TREE_CODE (decl
) != FUNCTION_DECL
|| !TREE_ASM_WRITTEN (decl
));
5348 if (! TREE_PUBLIC (decl
))
5349 error ("weak declaration of %q+D must be public", decl
);
5350 else if (!TARGET_SUPPORTS_WEAK
)
5351 warning (0, "weak declaration of %q+D not supported", decl
);
5354 if (!lookup_attribute ("weak", DECL_ATTRIBUTES (decl
)))
5355 DECL_ATTRIBUTES (decl
)
5356 = tree_cons (get_identifier ("weak"), NULL
, DECL_ATTRIBUTES (decl
));
5360 weak_finish_1 (tree decl
)
5362 #if defined (ASM_WEAKEN_DECL) || defined (ASM_WEAKEN_LABEL)
5363 const char *const name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
5366 if (! TREE_USED (decl
))
5369 #ifdef ASM_WEAKEN_DECL
5370 ASM_WEAKEN_DECL (asm_out_file
, decl
, name
, NULL
);
5372 #ifdef ASM_WEAKEN_LABEL
5373 ASM_WEAKEN_LABEL (asm_out_file
, name
);
5375 #ifdef ASM_OUTPUT_WEAK_ALIAS
5377 static bool warn_once
= 0;
5380 warning (0, "only weak aliases are supported in this configuration");
5390 /* Fiven an assembly name, find the decl it is associated with. */
5392 find_decl (tree target
)
5394 symtab_node
*node
= symtab_node_for_asm (target
);
5400 /* This TREE_LIST contains weakref targets. */
5402 static GTY(()) tree weakref_targets
;
5404 /* Emit any pending weak declarations. */
5411 for (t
= weakref_targets
; t
; t
= TREE_CHAIN (t
))
5413 tree alias_decl
= TREE_PURPOSE (t
);
5414 tree target
= ultimate_transparent_alias_target (&TREE_VALUE (t
));
5416 if (! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (alias_decl
)))
5417 /* Remove alias_decl from the weak list, but leave entries for
5418 the target alone. */
5420 #ifndef ASM_OUTPUT_WEAKREF
5421 else if (! TREE_SYMBOL_REFERENCED (target
))
5423 /* Use ASM_WEAKEN_LABEL only if ASM_WEAKEN_DECL is not
5424 defined, otherwise we and weak_finish_1 would use
5425 different macros. */
5426 # if defined ASM_WEAKEN_LABEL && ! defined ASM_WEAKEN_DECL
5427 ASM_WEAKEN_LABEL (asm_out_file
, IDENTIFIER_POINTER (target
));
5429 tree decl
= find_decl (target
);
5433 decl
= build_decl (DECL_SOURCE_LOCATION (alias_decl
),
5434 TREE_CODE (alias_decl
), target
,
5435 TREE_TYPE (alias_decl
));
5437 DECL_EXTERNAL (decl
) = 1;
5438 TREE_PUBLIC (decl
) = 1;
5439 DECL_ARTIFICIAL (decl
) = 1;
5440 TREE_NOTHROW (decl
) = TREE_NOTHROW (alias_decl
);
5441 TREE_USED (decl
) = 1;
5444 weak_finish_1 (decl
);
5453 /* Remove the alias and the target from the pending weak list
5454 so that we do not emit any .weak directives for the former,
5455 nor multiple .weak directives for the latter. */
5456 for (p
= &weak_decls
; (t2
= *p
) ; )
5458 if (TREE_VALUE (t2
) == alias_decl
5459 || target
== DECL_ASSEMBLER_NAME (TREE_VALUE (t2
)))
5460 *p
= TREE_CHAIN (t2
);
5462 p
= &TREE_CHAIN (t2
);
5465 /* Remove other weakrefs to the same target, to speed things up. */
5466 for (p
= &TREE_CHAIN (t
); (t2
= *p
) ; )
5468 if (target
== ultimate_transparent_alias_target (&TREE_VALUE (t2
)))
5469 *p
= TREE_CHAIN (t2
);
5471 p
= &TREE_CHAIN (t2
);
5476 for (t
= weak_decls
; t
; t
= TREE_CHAIN (t
))
5478 tree decl
= TREE_VALUE (t
);
5480 weak_finish_1 (decl
);
5484 /* Emit the assembly bits to indicate that DECL is globally visible. */
5487 globalize_decl (tree decl
)
5490 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
5491 if (DECL_WEAK (decl
))
5493 const char *name
= XSTR (XEXP (DECL_RTL (decl
), 0), 0);
5496 #ifdef ASM_WEAKEN_DECL
5497 ASM_WEAKEN_DECL (asm_out_file
, decl
, name
, 0);
5499 ASM_WEAKEN_LABEL (asm_out_file
, name
);
5502 /* Remove this function from the pending weak list so that
5503 we do not emit multiple .weak directives for it. */
5504 for (p
= &weak_decls
; (t
= *p
) ; )
5506 if (DECL_ASSEMBLER_NAME (decl
) == DECL_ASSEMBLER_NAME (TREE_VALUE (t
)))
5507 *p
= TREE_CHAIN (t
);
5509 p
= &TREE_CHAIN (t
);
5512 /* Remove weakrefs to the same target from the pending weakref
5513 list, for the same reason. */
5514 for (p
= &weakref_targets
; (t
= *p
) ; )
5516 if (DECL_ASSEMBLER_NAME (decl
)
5517 == ultimate_transparent_alias_target (&TREE_VALUE (t
)))
5518 *p
= TREE_CHAIN (t
);
5520 p
= &TREE_CHAIN (t
);
5527 targetm
.asm_out
.globalize_decl_name (asm_out_file
, decl
);
5530 vec
<alias_pair
, va_gc
> *alias_pairs
;
5532 /* Output the assembler code for a define (equate) using ASM_OUTPUT_DEF
5533 or ASM_OUTPUT_DEF_FROM_DECLS. The function defines the symbol whose
5534 tree node is DECL to have the value of the tree node TARGET. */
5537 do_assemble_alias (tree decl
, tree target
)
5539 /* Emulated TLS had better not get this var. */
5540 gcc_assert (!(!targetm
.have_tls
5541 && TREE_CODE (decl
) == VAR_DECL
5542 && DECL_THREAD_LOCAL_P (decl
)));
5544 if (TREE_ASM_WRITTEN (decl
))
5547 /* We must force creation of DECL_RTL for debug info generation, even though
5548 we don't use it here. */
5549 make_decl_rtl (decl
);
5551 TREE_ASM_WRITTEN (decl
) = 1;
5552 TREE_ASM_WRITTEN (DECL_ASSEMBLER_NAME (decl
)) = 1;
5554 if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl
)))
5556 ultimate_transparent_alias_target (&target
);
5558 if (!TREE_SYMBOL_REFERENCED (target
))
5559 weakref_targets
= tree_cons (decl
, target
, weakref_targets
);
5561 #ifdef ASM_OUTPUT_WEAKREF
5562 ASM_OUTPUT_WEAKREF (asm_out_file
, decl
,
5563 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
5564 IDENTIFIER_POINTER (target
));
5566 if (!TARGET_SUPPORTS_WEAK
)
5568 error_at (DECL_SOURCE_LOCATION (decl
),
5569 "weakref is not supported in this configuration");
5576 #ifdef ASM_OUTPUT_DEF
5577 /* Make name accessible from other files, if appropriate. */
5579 if (TREE_PUBLIC (decl
))
5581 globalize_decl (decl
);
5582 maybe_assemble_visibility (decl
);
5584 if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (decl
)))
5586 #if defined (ASM_OUTPUT_TYPE_DIRECTIVE)
5587 if (targetm
.has_ifunc_p ())
5588 ASM_OUTPUT_TYPE_DIRECTIVE
5589 (asm_out_file
, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
5593 error_at (DECL_SOURCE_LOCATION (decl
),
5594 "ifunc is not supported on this target");
5597 # ifdef ASM_OUTPUT_DEF_FROM_DECLS
5598 ASM_OUTPUT_DEF_FROM_DECLS (asm_out_file
, decl
, target
);
5600 ASM_OUTPUT_DEF (asm_out_file
,
5601 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
5602 IDENTIFIER_POINTER (target
));
5604 #elif defined (ASM_OUTPUT_WEAK_ALIAS) || defined (ASM_WEAKEN_DECL)
5609 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
5610 # ifdef ASM_WEAKEN_DECL
5611 ASM_WEAKEN_DECL (asm_out_file
, decl
, name
, IDENTIFIER_POINTER (target
));
5613 ASM_OUTPUT_WEAK_ALIAS (asm_out_file
, name
, IDENTIFIER_POINTER (target
));
5615 /* Remove this function from the pending weak list so that
5616 we do not emit multiple .weak directives for it. */
5617 for (p
= &weak_decls
; (t
= *p
) ; )
5618 if (DECL_ASSEMBLER_NAME (decl
) == DECL_ASSEMBLER_NAME (TREE_VALUE (t
)))
5619 *p
= TREE_CHAIN (t
);
5621 p
= &TREE_CHAIN (t
);
5623 /* Remove weakrefs to the same target from the pending weakref
5624 list, for the same reason. */
5625 for (p
= &weakref_targets
; (t
= *p
) ; )
5627 if (DECL_ASSEMBLER_NAME (decl
)
5628 == ultimate_transparent_alias_target (&TREE_VALUE (t
)))
5629 *p
= TREE_CHAIN (t
);
5631 p
= &TREE_CHAIN (t
);
5637 /* Emit an assembler directive to make the symbol for DECL an alias to
5638 the symbol for TARGET. */
5641 assemble_alias (tree decl
, tree target
)
5645 if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl
)))
5647 tree alias
= DECL_ASSEMBLER_NAME (decl
);
5649 ultimate_transparent_alias_target (&target
);
5651 if (alias
== target
)
5652 error ("weakref %q+D ultimately targets itself", decl
);
5653 if (TREE_PUBLIC (decl
))
5654 error ("weakref %q+D must have static linkage", decl
);
5658 #if !defined (ASM_OUTPUT_DEF)
5659 # if !defined(ASM_OUTPUT_WEAK_ALIAS) && !defined (ASM_WEAKEN_DECL)
5660 error_at (DECL_SOURCE_LOCATION (decl
),
5661 "alias definitions not supported in this configuration");
5662 TREE_ASM_WRITTEN (decl
) = 1;
5665 if (!DECL_WEAK (decl
))
5667 if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (decl
)))
5668 error_at (DECL_SOURCE_LOCATION (decl
),
5669 "ifunc is not supported in this configuration");
5671 error_at (DECL_SOURCE_LOCATION (decl
),
5672 "only weak aliases are supported in this configuration");
5673 TREE_ASM_WRITTEN (decl
) = 1;
5679 TREE_USED (decl
) = 1;
5681 /* Allow aliases to aliases. */
5682 if (TREE_CODE (decl
) == FUNCTION_DECL
)
5683 cgraph_get_create_node (decl
)->alias
= true;
5685 varpool_node_for_decl (decl
)->alias
= true;
5687 /* If the target has already been emitted, we don't have to queue the
5688 alias. This saves a tad of memory. */
5689 if (cgraph_global_info_ready
)
5690 target_decl
= find_decl (target
);
5693 if ((target_decl
&& TREE_ASM_WRITTEN (target_decl
))
5694 || cgraph_state
>= CGRAPH_STATE_EXPANSION
)
5695 do_assemble_alias (decl
, target
);
5698 alias_pair p
= {decl
, target
};
5699 vec_safe_push (alias_pairs
, p
);
5703 /* Record and output a table of translations from original function
5704 to its transaction aware clone. Note that tm_pure functions are
5705 considered to be their own clone. */
5707 static GTY((if_marked ("tree_map_marked_p"), param_is (struct tree_map
)))
5708 htab_t tm_clone_hash
;
5711 record_tm_clone_pair (tree o
, tree n
)
5713 struct tree_map
**slot
, *h
;
5715 if (tm_clone_hash
== NULL
)
5716 tm_clone_hash
= htab_create_ggc (32, tree_map_hash
, tree_map_eq
, 0);
5718 h
= ggc_alloc
<tree_map
> ();
5719 h
->hash
= htab_hash_pointer (o
);
5723 slot
= (struct tree_map
**)
5724 htab_find_slot_with_hash (tm_clone_hash
, h
, h
->hash
, INSERT
);
5729 get_tm_clone_pair (tree o
)
5733 struct tree_map
*h
, in
;
5736 in
.hash
= htab_hash_pointer (o
);
5737 h
= (struct tree_map
*) htab_find_with_hash (tm_clone_hash
,
5745 typedef struct tm_alias_pair
5753 /* Helper function for finish_tm_clone_pairs. Dump a hash table entry
5754 into a VEC in INFO. */
5757 dump_tm_clone_to_vec (void **slot
, void *info
)
5759 struct tree_map
*map
= (struct tree_map
*) *slot
;
5760 vec
<tm_alias_pair
> *tm_alias_pairs
= (vec
<tm_alias_pair
> *) info
;
5761 tm_alias_pair p
= {DECL_UID (map
->base
.from
), map
->base
.from
, map
->to
};
5762 tm_alias_pairs
->safe_push (p
);
5766 /* Dump the actual pairs to the .tm_clone_table section. */
5769 dump_tm_clone_pairs (vec
<tm_alias_pair
> tm_alias_pairs
)
5773 bool switched
= false;
5775 FOR_EACH_VEC_ELT (tm_alias_pairs
, i
, p
)
5779 struct cgraph_node
*src_n
= cgraph_get_node (src
);
5780 struct cgraph_node
*dst_n
= cgraph_get_node (dst
);
5782 /* The function ipa_tm_create_version() marks the clone as needed if
5783 the original function was needed. But we also mark the clone as
5784 needed if we ever called the clone indirectly through
5785 TM_GETTMCLONE. If neither of these are true, we didn't generate
5786 a clone, and we didn't call it indirectly... no sense keeping it
5787 in the clone table. */
5788 if (!dst_n
|| !dst_n
->definition
)
5791 /* This covers the case where we have optimized the original
5792 function away, and only access the transactional clone. */
5793 if (!src_n
|| !src_n
->definition
)
5798 switch_to_section (targetm
.asm_out
.tm_clone_table_section ());
5799 assemble_align (POINTER_SIZE
);
5803 assemble_integer (XEXP (DECL_RTL (src
), 0),
5804 POINTER_SIZE
/ BITS_PER_UNIT
, POINTER_SIZE
, 1);
5805 assemble_integer (XEXP (DECL_RTL (dst
), 0),
5806 POINTER_SIZE
/ BITS_PER_UNIT
, POINTER_SIZE
, 1);
5810 /* Provide a default for the tm_clone_table section. */
5813 default_clone_table_section (void)
5815 return get_named_section (NULL
, ".tm_clone_table", 3);
5818 /* Helper comparison function for qsorting by the DECL_UID stored in
5819 alias_pair->emitted_diags. */
5822 tm_alias_pair_cmp (const void *x
, const void *y
)
5824 const tm_alias_pair
*p1
= (const tm_alias_pair
*) x
;
5825 const tm_alias_pair
*p2
= (const tm_alias_pair
*) y
;
5826 if (p1
->uid
< p2
->uid
)
5828 if (p1
->uid
> p2
->uid
)
5834 finish_tm_clone_pairs (void)
5836 vec
<tm_alias_pair
> tm_alias_pairs
= vNULL
;
5838 if (tm_clone_hash
== NULL
)
5841 /* We need a determenistic order for the .tm_clone_table, otherwise
5842 we will get bootstrap comparison failures, so dump the hash table
5843 to a vector, sort it, and dump the vector. */
5845 /* Dump the hashtable to a vector. */
5846 htab_traverse_noresize (tm_clone_hash
, dump_tm_clone_to_vec
,
5847 (void *) &tm_alias_pairs
);
5849 tm_alias_pairs
.qsort (tm_alias_pair_cmp
);
5852 dump_tm_clone_pairs (tm_alias_pairs
);
5854 htab_delete (tm_clone_hash
);
5855 tm_clone_hash
= NULL
;
5856 tm_alias_pairs
.release ();
5860 /* Emit an assembler directive to set symbol for DECL visibility to
5861 the visibility type VIS, which must not be VISIBILITY_DEFAULT. */
5864 default_assemble_visibility (tree decl ATTRIBUTE_UNUSED
,
5865 int vis ATTRIBUTE_UNUSED
)
5867 #ifdef HAVE_GAS_HIDDEN
5868 static const char * const visibility_types
[] = {
5869 NULL
, "protected", "hidden", "internal"
5872 const char *name
, *type
;
5874 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
5875 type
= visibility_types
[vis
];
5877 fprintf (asm_out_file
, "\t.%s\t", type
);
5878 assemble_name (asm_out_file
, name
);
5879 fprintf (asm_out_file
, "\n");
5881 if (!DECL_ARTIFICIAL (decl
))
5882 warning (OPT_Wattributes
, "visibility attribute not supported "
5883 "in this configuration; ignored");
5887 /* A helper function to call assemble_visibility when needed for a decl. */
5890 maybe_assemble_visibility (tree decl
)
5892 enum symbol_visibility vis
= DECL_VISIBILITY (decl
);
5894 if (vis
!= VISIBILITY_DEFAULT
)
5896 targetm
.asm_out
.assemble_visibility (decl
, vis
);
5903 /* Returns 1 if the target configuration supports defining public symbols
5904 so that one of them will be chosen at link time instead of generating a
5905 multiply-defined symbol error, whether through the use of weak symbols or
5906 a target-specific mechanism for having duplicates discarded. */
5909 supports_one_only (void)
5911 if (SUPPORTS_ONE_ONLY
)
5913 return TARGET_SUPPORTS_WEAK
;
5916 /* Set up DECL as a public symbol that can be defined in multiple
5917 translation units without generating a linker error. */
5920 make_decl_one_only (tree decl
, tree comdat_group
)
5922 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5923 || TREE_CODE (decl
) == FUNCTION_DECL
);
5925 TREE_PUBLIC (decl
) = 1;
5927 if (SUPPORTS_ONE_ONLY
)
5929 #ifdef MAKE_DECL_ONE_ONLY
5930 MAKE_DECL_ONE_ONLY (decl
);
5932 DECL_COMDAT_GROUP (decl
) = comdat_group
;
5934 else if (TREE_CODE (decl
) == VAR_DECL
5935 && (DECL_INITIAL (decl
) == 0 || DECL_INITIAL (decl
) == error_mark_node
))
5936 DECL_COMMON (decl
) = 1;
5939 gcc_assert (TARGET_SUPPORTS_WEAK
);
5940 DECL_WEAK (decl
) = 1;
5945 init_varasm_once (void)
5947 section_htab
= htab_create_ggc (31, section_entry_hash
,
5948 section_entry_eq
, NULL
);
5949 object_block_htab
= htab_create_ggc (31, object_block_entry_hash
,
5950 object_block_entry_eq
, NULL
);
5951 const_desc_htab
= htab_create_ggc (1009, const_desc_hash
,
5952 const_desc_eq
, NULL
);
5954 const_alias_set
= new_alias_set ();
5955 shared_constant_pool
= create_constant_pool ();
5957 #ifdef TEXT_SECTION_ASM_OP
5958 text_section
= get_unnamed_section (SECTION_CODE
, output_section_asm_op
,
5959 TEXT_SECTION_ASM_OP
);
5962 #ifdef DATA_SECTION_ASM_OP
5963 data_section
= get_unnamed_section (SECTION_WRITE
, output_section_asm_op
,
5964 DATA_SECTION_ASM_OP
);
5967 #ifdef SDATA_SECTION_ASM_OP
5968 sdata_section
= get_unnamed_section (SECTION_WRITE
, output_section_asm_op
,
5969 SDATA_SECTION_ASM_OP
);
5972 #ifdef READONLY_DATA_SECTION_ASM_OP
5973 readonly_data_section
= get_unnamed_section (0, output_section_asm_op
,
5974 READONLY_DATA_SECTION_ASM_OP
);
5977 #ifdef CTORS_SECTION_ASM_OP
5978 ctors_section
= get_unnamed_section (0, output_section_asm_op
,
5979 CTORS_SECTION_ASM_OP
);
5982 #ifdef DTORS_SECTION_ASM_OP
5983 dtors_section
= get_unnamed_section (0, output_section_asm_op
,
5984 DTORS_SECTION_ASM_OP
);
5987 #ifdef BSS_SECTION_ASM_OP
5988 bss_section
= get_unnamed_section (SECTION_WRITE
| SECTION_BSS
,
5989 output_section_asm_op
,
5990 BSS_SECTION_ASM_OP
);
5993 #ifdef SBSS_SECTION_ASM_OP
5994 sbss_section
= get_unnamed_section (SECTION_WRITE
| SECTION_BSS
,
5995 output_section_asm_op
,
5996 SBSS_SECTION_ASM_OP
);
5999 tls_comm_section
= get_noswitch_section (SECTION_WRITE
| SECTION_BSS
6000 | SECTION_COMMON
, emit_tls_common
);
6001 lcomm_section
= get_noswitch_section (SECTION_WRITE
| SECTION_BSS
6002 | SECTION_COMMON
, emit_local
);
6003 comm_section
= get_noswitch_section (SECTION_WRITE
| SECTION_BSS
6004 | SECTION_COMMON
, emit_common
);
6006 #if defined ASM_OUTPUT_ALIGNED_BSS
6007 bss_noswitch_section
= get_noswitch_section (SECTION_WRITE
| SECTION_BSS
,
6011 targetm
.asm_out
.init_sections ();
6013 if (readonly_data_section
== NULL
)
6014 readonly_data_section
= text_section
;
6016 #ifdef ASM_OUTPUT_EXTERNAL
6017 pending_assemble_externals_set
= pointer_set_create ();
6022 decl_default_tls_model (const_tree decl
)
6024 enum tls_model kind
;
6027 is_local
= targetm
.binds_local_p (decl
);
6031 kind
= TLS_MODEL_LOCAL_EXEC
;
6033 kind
= TLS_MODEL_INITIAL_EXEC
;
6036 /* Local dynamic is inefficient when we're not combining the
6037 parts of the address. */
6038 else if (optimize
&& is_local
)
6039 kind
= TLS_MODEL_LOCAL_DYNAMIC
;
6041 kind
= TLS_MODEL_GLOBAL_DYNAMIC
;
6042 if (kind
< flag_tls_default
)
6043 kind
= flag_tls_default
;
6048 /* Select a set of attributes for section NAME based on the properties
6049 of DECL and whether or not RELOC indicates that DECL's initializer
6050 might contain runtime relocations.
6052 We make the section read-only and executable for a function decl,
6053 read-only for a const data decl, and writable for a non-const data decl. */
6056 default_section_type_flags (tree decl
, const char *name
, int reloc
)
6060 if (decl
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6061 flags
= SECTION_CODE
;
6064 enum section_category category
6065 = categorize_decl_for_section (decl
, reloc
);
6066 if (decl_readonly_section_1 (category
))
6068 else if (category
== SECCAT_DATA_REL_RO
6069 || category
== SECCAT_DATA_REL_RO_LOCAL
)
6070 flags
= SECTION_WRITE
| SECTION_RELRO
;
6072 flags
= SECTION_WRITE
;
6076 flags
= SECTION_WRITE
;
6077 if (strcmp (name
, ".data.rel.ro") == 0
6078 || strcmp (name
, ".data.rel.ro.local") == 0)
6079 flags
|= SECTION_RELRO
;
6082 if (decl
&& DECL_P (decl
) && DECL_COMDAT_GROUP (decl
))
6083 flags
|= SECTION_LINKONCE
;
6085 if (strcmp (name
, ".vtable_map_vars") == 0)
6086 flags
|= SECTION_LINKONCE
;
6088 if (decl
&& TREE_CODE (decl
) == VAR_DECL
&& DECL_THREAD_LOCAL_P (decl
))
6089 flags
|= SECTION_TLS
| SECTION_WRITE
;
6091 if (strcmp (name
, ".bss") == 0
6092 || strncmp (name
, ".bss.", 5) == 0
6093 || strncmp (name
, ".gnu.linkonce.b.", 16) == 0
6094 || strcmp (name
, ".sbss") == 0
6095 || strncmp (name
, ".sbss.", 6) == 0
6096 || strncmp (name
, ".gnu.linkonce.sb.", 17) == 0)
6097 flags
|= SECTION_BSS
;
6099 if (strcmp (name
, ".tdata") == 0
6100 || strncmp (name
, ".tdata.", 7) == 0
6101 || strncmp (name
, ".gnu.linkonce.td.", 17) == 0)
6102 flags
|= SECTION_TLS
;
6104 if (strcmp (name
, ".tbss") == 0
6105 || strncmp (name
, ".tbss.", 6) == 0
6106 || strncmp (name
, ".gnu.linkonce.tb.", 17) == 0)
6107 flags
|= SECTION_TLS
| SECTION_BSS
;
6109 /* These three sections have special ELF types. They are neither
6110 SHT_PROGBITS nor SHT_NOBITS, so when changing sections we don't
6111 want to print a section type (@progbits or @nobits). If someone
6112 is silly enough to emit code or TLS variables to one of these
6113 sections, then don't handle them specially. */
6114 if (!(flags
& (SECTION_CODE
| SECTION_BSS
| SECTION_TLS
))
6115 && (strcmp (name
, ".init_array") == 0
6116 || strcmp (name
, ".fini_array") == 0
6117 || strcmp (name
, ".preinit_array") == 0))
6118 flags
|= SECTION_NOTYPE
;
6123 /* Return true if the target supports some form of global BSS,
6124 either through bss_noswitch_section, or by selecting a BSS
6125 section in TARGET_ASM_SELECT_SECTION. */
6128 have_global_bss_p (void)
6130 return bss_noswitch_section
|| targetm
.have_switchable_bss_sections
;
6133 /* Output assembly to switch to section NAME with attribute FLAGS.
6134 Four variants for common object file formats. */
6137 default_no_named_section (const char *name ATTRIBUTE_UNUSED
,
6138 unsigned int flags ATTRIBUTE_UNUSED
,
6139 tree decl ATTRIBUTE_UNUSED
)
6141 /* Some object formats don't support named sections at all. The
6142 front-end should already have flagged this as an error. */
6146 #ifndef TLS_SECTION_ASM_FLAG
6147 #define TLS_SECTION_ASM_FLAG 'T'
6151 default_elf_asm_named_section (const char *name
, unsigned int flags
,
6152 tree decl ATTRIBUTE_UNUSED
)
6154 char flagchars
[10], *f
= flagchars
;
6156 /* If we have already declared this section, we can use an
6157 abbreviated form to switch back to it -- unless this section is
6158 part of a COMDAT groups, in which case GAS requires the full
6159 declaration every time. */
6160 if (!(HAVE_COMDAT_GROUP
&& (flags
& SECTION_LINKONCE
))
6161 && (flags
& SECTION_DECLARED
))
6163 fprintf (asm_out_file
, "\t.section\t%s\n", name
);
6167 if (!(flags
& SECTION_DEBUG
))
6169 if (flags
& SECTION_EXCLUDE
)
6171 if (flags
& SECTION_WRITE
)
6173 if (flags
& SECTION_CODE
)
6175 if (flags
& SECTION_SMALL
)
6177 if (flags
& SECTION_MERGE
)
6179 if (flags
& SECTION_STRINGS
)
6181 if (flags
& SECTION_TLS
)
6182 *f
++ = TLS_SECTION_ASM_FLAG
;
6183 if (HAVE_COMDAT_GROUP
&& (flags
& SECTION_LINKONCE
))
6187 fprintf (asm_out_file
, "\t.section\t%s,\"%s\"", name
, flagchars
);
6189 if (!(flags
& SECTION_NOTYPE
))
6194 if (flags
& SECTION_BSS
)
6200 /* On platforms that use "@" as the assembly comment character,
6202 if (strcmp (ASM_COMMENT_START
, "@") == 0)
6204 fprintf (asm_out_file
, format
, type
);
6206 if (flags
& SECTION_ENTSIZE
)
6207 fprintf (asm_out_file
, ",%d", flags
& SECTION_ENTSIZE
);
6208 if (HAVE_COMDAT_GROUP
&& (flags
& SECTION_LINKONCE
))
6210 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
6211 fprintf (asm_out_file
, ",%s,comdat", IDENTIFIER_POINTER (decl
));
6213 fprintf (asm_out_file
, ",%s,comdat",
6214 IDENTIFIER_POINTER (DECL_COMDAT_GROUP (decl
)));
6218 putc ('\n', asm_out_file
);
6222 default_coff_asm_named_section (const char *name
, unsigned int flags
,
6223 tree decl ATTRIBUTE_UNUSED
)
6225 char flagchars
[8], *f
= flagchars
;
6227 if (flags
& SECTION_WRITE
)
6229 if (flags
& SECTION_CODE
)
6233 fprintf (asm_out_file
, "\t.section\t%s,\"%s\"\n", name
, flagchars
);
6237 default_pe_asm_named_section (const char *name
, unsigned int flags
,
6240 default_coff_asm_named_section (name
, flags
, decl
);
6242 if (flags
& SECTION_LINKONCE
)
6244 /* Functions may have been compiled at various levels of
6245 optimization so we can't use `same_size' here.
6246 Instead, have the linker pick one. */
6247 fprintf (asm_out_file
, "\t.linkonce %s\n",
6248 (flags
& SECTION_CODE
? "discard" : "same_size"));
6252 /* The lame default section selector. */
6255 default_select_section (tree decl
, int reloc
,
6256 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
)
6260 if (decl_readonly_section (decl
, reloc
))
6261 return readonly_data_section
;
6263 else if (TREE_CODE (decl
) == CONSTRUCTOR
)
6265 if (! ((flag_pic
&& reloc
)
6266 || !TREE_READONLY (decl
)
6267 || TREE_SIDE_EFFECTS (decl
)
6268 || !TREE_CONSTANT (decl
)))
6269 return readonly_data_section
;
6271 else if (TREE_CODE (decl
) == STRING_CST
)
6272 return readonly_data_section
;
6273 else if (! (flag_pic
&& reloc
))
6274 return readonly_data_section
;
6276 return data_section
;
6279 enum section_category
6280 categorize_decl_for_section (const_tree decl
, int reloc
)
6282 enum section_category ret
;
6284 if (TREE_CODE (decl
) == FUNCTION_DECL
)
6286 else if (TREE_CODE (decl
) == STRING_CST
)
6288 if ((flag_sanitize
& SANITIZE_ADDRESS
)
6289 && asan_protect_global (CONST_CAST_TREE (decl
)))
6290 /* or !flag_merge_constants */
6291 return SECCAT_RODATA
;
6293 return SECCAT_RODATA_MERGE_STR
;
6295 else if (TREE_CODE (decl
) == VAR_DECL
)
6297 if (bss_initializer_p (decl
))
6299 else if (! TREE_READONLY (decl
)
6300 || TREE_SIDE_EFFECTS (decl
)
6301 || ! TREE_CONSTANT (DECL_INITIAL (decl
)))
6303 /* Here the reloc_rw_mask is not testing whether the section should
6304 be read-only or not, but whether the dynamic link will have to
6305 do something. If so, we wish to segregate the data in order to
6306 minimize cache misses inside the dynamic linker. */
6307 if (reloc
& targetm
.asm_out
.reloc_rw_mask ())
6308 ret
= reloc
== 1 ? SECCAT_DATA_REL_LOCAL
: SECCAT_DATA_REL
;
6312 else if (reloc
& targetm
.asm_out
.reloc_rw_mask ())
6313 ret
= reloc
== 1 ? SECCAT_DATA_REL_RO_LOCAL
: SECCAT_DATA_REL_RO
;
6314 else if (reloc
|| flag_merge_constants
< 2
6315 || ((flag_sanitize
& SANITIZE_ADDRESS
)
6316 && asan_protect_global (CONST_CAST_TREE (decl
))))
6317 /* C and C++ don't allow different variables to share the same
6318 location. -fmerge-all-constants allows even that (at the
6319 expense of not conforming). */
6320 ret
= SECCAT_RODATA
;
6321 else if (TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
)
6322 ret
= SECCAT_RODATA_MERGE_STR_INIT
;
6324 ret
= SECCAT_RODATA_MERGE_CONST
;
6326 else if (TREE_CODE (decl
) == CONSTRUCTOR
)
6328 if ((reloc
& targetm
.asm_out
.reloc_rw_mask ())
6329 || TREE_SIDE_EFFECTS (decl
)
6330 || ! TREE_CONSTANT (decl
))
6333 ret
= SECCAT_RODATA
;
6336 ret
= SECCAT_RODATA
;
6338 /* There are no read-only thread-local sections. */
6339 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_THREAD_LOCAL_P (decl
))
6341 /* Note that this would be *just* SECCAT_BSS, except that there's
6342 no concept of a read-only thread-local-data section. */
6343 if (ret
== SECCAT_BSS
6344 || (flag_zero_initialized_in_bss
6345 && initializer_zerop (DECL_INITIAL (decl
))))
6351 /* If the target uses small data sections, select it. */
6352 else if (targetm
.in_small_data_p (decl
))
6354 if (ret
== SECCAT_BSS
)
6356 else if (targetm
.have_srodata_section
&& ret
== SECCAT_RODATA
)
6357 ret
= SECCAT_SRODATA
;
6366 decl_readonly_section_1 (enum section_category category
)
6371 case SECCAT_RODATA_MERGE_STR
:
6372 case SECCAT_RODATA_MERGE_STR_INIT
:
6373 case SECCAT_RODATA_MERGE_CONST
:
6374 case SECCAT_SRODATA
:
6382 decl_readonly_section (const_tree decl
, int reloc
)
6384 return decl_readonly_section_1 (categorize_decl_for_section (decl
, reloc
));
6387 /* Select a section based on the above categorization. */
6390 default_elf_select_section (tree decl
, int reloc
,
6391 unsigned HOST_WIDE_INT align
)
6394 switch (categorize_decl_for_section (decl
, reloc
))
6397 /* We're not supposed to be called on FUNCTION_DECLs. */
6400 return readonly_data_section
;
6401 case SECCAT_RODATA_MERGE_STR
:
6402 return mergeable_string_section (decl
, align
, 0);
6403 case SECCAT_RODATA_MERGE_STR_INIT
:
6404 return mergeable_string_section (DECL_INITIAL (decl
), align
, 0);
6405 case SECCAT_RODATA_MERGE_CONST
:
6406 return mergeable_constant_section (DECL_MODE (decl
), align
, 0);
6407 case SECCAT_SRODATA
:
6411 return data_section
;
6412 case SECCAT_DATA_REL
:
6413 sname
= ".data.rel";
6415 case SECCAT_DATA_REL_LOCAL
:
6416 sname
= ".data.rel.local";
6418 case SECCAT_DATA_REL_RO
:
6419 sname
= ".data.rel.ro";
6421 case SECCAT_DATA_REL_RO_LOCAL
:
6422 sname
= ".data.rel.ro.local";
6445 return get_named_section (decl
, sname
, reloc
);
6448 /* Construct a unique section name based on the decl name and the
6449 categorization performed above. */
6452 default_unique_section (tree decl
, int reloc
)
6454 /* We only need to use .gnu.linkonce if we don't have COMDAT groups. */
6455 bool one_only
= DECL_ONE_ONLY (decl
) && !HAVE_COMDAT_GROUP
;
6456 const char *prefix
, *name
, *linkonce
;
6459 switch (categorize_decl_for_section (decl
, reloc
))
6462 prefix
= one_only
? ".t" : ".text";
6465 case SECCAT_RODATA_MERGE_STR
:
6466 case SECCAT_RODATA_MERGE_STR_INIT
:
6467 case SECCAT_RODATA_MERGE_CONST
:
6468 prefix
= one_only
? ".r" : ".rodata";
6470 case SECCAT_SRODATA
:
6471 prefix
= one_only
? ".s2" : ".sdata2";
6474 prefix
= one_only
? ".d" : ".data";
6476 case SECCAT_DATA_REL
:
6477 prefix
= one_only
? ".d.rel" : ".data.rel";
6479 case SECCAT_DATA_REL_LOCAL
:
6480 prefix
= one_only
? ".d.rel.local" : ".data.rel.local";
6482 case SECCAT_DATA_REL_RO
:
6483 prefix
= one_only
? ".d.rel.ro" : ".data.rel.ro";
6485 case SECCAT_DATA_REL_RO_LOCAL
:
6486 prefix
= one_only
? ".d.rel.ro.local" : ".data.rel.ro.local";
6489 prefix
= one_only
? ".s" : ".sdata";
6492 prefix
= one_only
? ".b" : ".bss";
6495 prefix
= one_only
? ".sb" : ".sbss";
6498 prefix
= one_only
? ".td" : ".tdata";
6501 prefix
= one_only
? ".tb" : ".tbss";
6507 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
6508 name
= targetm
.strip_name_encoding (name
);
6510 /* If we're using one_only, then there needs to be a .gnu.linkonce
6511 prefix to the section name. */
6512 linkonce
= one_only
? ".gnu.linkonce" : "";
6514 string
= ACONCAT ((linkonce
, prefix
, ".", name
, NULL
));
6516 DECL_SECTION_NAME (decl
) = build_string (strlen (string
), string
);
6519 /* Like compute_reloc_for_constant, except for an RTX. The return value
6520 is a mask for which bit 1 indicates a global relocation, and bit 0
6521 indicates a local relocation. */
6524 compute_reloc_for_rtx_1 (rtx
*xp
, void *data
)
6526 int *preloc
= (int *) data
;
6529 switch (GET_CODE (x
))
6532 *preloc
|= SYMBOL_REF_LOCAL_P (x
) ? 1 : 2;
6545 compute_reloc_for_rtx (rtx x
)
6549 switch (GET_CODE (x
))
6555 for_each_rtx (&x
, compute_reloc_for_rtx_1
, &reloc
);
6564 default_select_rtx_section (enum machine_mode mode ATTRIBUTE_UNUSED
,
6566 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
)
6568 if (compute_reloc_for_rtx (x
) & targetm
.asm_out
.reloc_rw_mask ())
6569 return data_section
;
6571 return readonly_data_section
;
6575 default_elf_select_rtx_section (enum machine_mode mode
, rtx x
,
6576 unsigned HOST_WIDE_INT align
)
6578 int reloc
= compute_reloc_for_rtx (x
);
6580 /* ??? Handle small data here somehow. */
6582 if (reloc
& targetm
.asm_out
.reloc_rw_mask ())
6585 return get_named_section (NULL
, ".data.rel.ro.local", 1);
6587 return get_named_section (NULL
, ".data.rel.ro", 3);
6590 return mergeable_constant_section (mode
, align
, 0);
6593 /* Set the generally applicable flags on the SYMBOL_REF for EXP. */
6596 default_encode_section_info (tree decl
, rtx rtl
, int first ATTRIBUTE_UNUSED
)
6601 /* Careful not to prod global register variables. */
6604 symbol
= XEXP (rtl
, 0);
6605 if (GET_CODE (symbol
) != SYMBOL_REF
)
6608 flags
= SYMBOL_REF_FLAGS (symbol
) & SYMBOL_FLAG_HAS_BLOCK_INFO
;
6609 if (TREE_CODE (decl
) == FUNCTION_DECL
)
6610 flags
|= SYMBOL_FLAG_FUNCTION
;
6611 if (targetm
.binds_local_p (decl
))
6612 flags
|= SYMBOL_FLAG_LOCAL
;
6613 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_THREAD_LOCAL_P (decl
))
6614 flags
|= DECL_TLS_MODEL (decl
) << SYMBOL_FLAG_TLS_SHIFT
;
6615 else if (targetm
.in_small_data_p (decl
))
6616 flags
|= SYMBOL_FLAG_SMALL
;
6617 /* ??? Why is DECL_EXTERNAL ever set for non-PUBLIC names? Without
6618 being PUBLIC, the thing *must* be defined in this translation unit.
6619 Prevent this buglet from being propagated into rtl code as well. */
6620 if (DECL_P (decl
) && DECL_EXTERNAL (decl
) && TREE_PUBLIC (decl
))
6621 flags
|= SYMBOL_FLAG_EXTERNAL
;
6623 SYMBOL_REF_FLAGS (symbol
) = flags
;
6626 /* By default, we do nothing for encode_section_info, so we need not
6627 do anything but discard the '*' marker. */
6630 default_strip_name_encoding (const char *str
)
6632 return str
+ (*str
== '*');
6635 #ifdef ASM_OUTPUT_DEF
6636 /* The default implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the
6637 anchor relative to ".", the current section position. */
6640 default_asm_output_anchor (rtx symbol
)
6644 sprintf (buffer
, "*. + " HOST_WIDE_INT_PRINT_DEC
,
6645 SYMBOL_REF_BLOCK_OFFSET (symbol
));
6646 ASM_OUTPUT_DEF (asm_out_file
, XSTR (symbol
, 0), buffer
);
6650 /* The default implementation of TARGET_USE_ANCHORS_FOR_SYMBOL_P. */
6653 default_use_anchors_for_symbol_p (const_rtx symbol
)
6658 /* Don't use anchors for mergeable sections. The linker might move
6659 the objects around. */
6660 sect
= SYMBOL_REF_BLOCK (symbol
)->sect
;
6661 if (sect
->common
.flags
& SECTION_MERGE
)
6664 /* Don't use anchors for small data sections. The small data register
6665 acts as an anchor for such sections. */
6666 if (sect
->common
.flags
& SECTION_SMALL
)
6669 decl
= SYMBOL_REF_DECL (symbol
);
6670 if (decl
&& DECL_P (decl
))
6672 /* Don't use section anchors for decls that might be defined or
6673 usurped by other modules. */
6674 if (TREE_PUBLIC (decl
) && !decl_binds_to_current_def_p (decl
))
6677 /* Don't use section anchors for decls that will be placed in a
6678 small data section. */
6679 /* ??? Ideally, this check would be redundant with the SECTION_SMALL
6680 one above. The problem is that we only use SECTION_SMALL for
6681 sections that should be marked as small in the section directive. */
6682 if (targetm
.in_small_data_p (decl
))
6688 /* Return true when RESOLUTION indicate that symbol will be bound to the
6689 definition provided by current .o file. */
6692 resolution_to_local_definition_p (enum ld_plugin_symbol_resolution resolution
)
6694 return (resolution
== LDPR_PREVAILING_DEF
6695 || resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
6696 || resolution
== LDPR_PREVAILING_DEF_IRONLY
);
6699 /* Return true when RESOLUTION indicate that symbol will be bound locally
6700 within current executable or DSO. */
6703 resolution_local_p (enum ld_plugin_symbol_resolution resolution
)
6705 return (resolution
== LDPR_PREVAILING_DEF
6706 || resolution
== LDPR_PREVAILING_DEF_IRONLY
6707 || resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
6708 || resolution
== LDPR_PREEMPTED_REG
6709 || resolution
== LDPR_PREEMPTED_IR
6710 || resolution
== LDPR_RESOLVED_IR
6711 || resolution
== LDPR_RESOLVED_EXEC
);
6714 /* Assume ELF-ish defaults, since that's pretty much the most liberal
6715 wrt cross-module name binding. */
6718 default_binds_local_p (const_tree exp
)
6720 return default_binds_local_p_1 (exp
, flag_shlib
);
6724 default_binds_local_p_1 (const_tree exp
, int shlib
)
6727 bool resolved_locally
= false;
6728 bool resolved_to_local_def
= false;
6730 /* With resolution file in hands, take look into resolutions.
6731 We can't just return true for resolved_locally symbols,
6732 because dynamic linking might overwrite symbols
6733 in shared libraries. */
6734 if (TREE_CODE (exp
) == VAR_DECL
&& TREE_PUBLIC (exp
)
6735 && (TREE_STATIC (exp
) || DECL_EXTERNAL (exp
)))
6737 varpool_node
*vnode
= varpool_get_node (exp
);
6738 if (vnode
&& (resolution_local_p (vnode
->resolution
) || vnode
->in_other_partition
))
6739 resolved_locally
= true;
6741 && resolution_to_local_definition_p (vnode
->resolution
))
6742 resolved_to_local_def
= true;
6744 else if (TREE_CODE (exp
) == FUNCTION_DECL
&& TREE_PUBLIC (exp
))
6746 struct cgraph_node
*node
= cgraph_get_node (exp
);
6748 && (resolution_local_p (node
->resolution
) || node
->in_other_partition
))
6749 resolved_locally
= true;
6751 && resolution_to_local_definition_p (node
->resolution
))
6752 resolved_to_local_def
= true;
6755 /* A non-decl is an entry in the constant pool. */
6758 /* Weakrefs may not bind locally, even though the weakref itself is always
6759 static and therefore local. Similarly, the resolver for ifunc functions
6760 might resolve to a non-local function.
6761 FIXME: We can resolve the weakref case more curefuly by looking at the
6763 else if (lookup_attribute ("weakref", DECL_ATTRIBUTES (exp
))
6764 || (TREE_CODE (exp
) == FUNCTION_DECL
6765 && lookup_attribute ("ifunc", DECL_ATTRIBUTES (exp
))))
6767 /* Static variables are always local. */
6768 else if (! TREE_PUBLIC (exp
))
6770 /* A variable is local if the user has said explicitly that it will
6772 else if ((DECL_VISIBILITY_SPECIFIED (exp
)
6773 || resolved_to_local_def
)
6774 && DECL_VISIBILITY (exp
) != VISIBILITY_DEFAULT
)
6776 /* Variables defined outside this object might not be local. */
6777 else if (DECL_EXTERNAL (exp
) && !resolved_locally
)
6779 /* If defined in this object and visibility is not default, must be
6781 else if (DECL_VISIBILITY (exp
) != VISIBILITY_DEFAULT
)
6783 /* Default visibility weak data can be overridden by a strong symbol
6784 in another module and so are not local. */
6785 else if (DECL_WEAK (exp
)
6786 && !resolved_locally
)
6788 /* If PIC, then assume that any global name can be overridden by
6789 symbols resolved from other modules. */
6792 /* Uninitialized COMMON variable may be unified with symbols
6793 resolved from other modules. */
6794 else if (DECL_COMMON (exp
)
6795 && !resolved_locally
6796 && (DECL_INITIAL (exp
) == NULL
6797 || DECL_INITIAL (exp
) == error_mark_node
))
6799 /* Otherwise we're left with initialized (or non-common) global data
6800 which is of necessity defined locally. */
6807 /* Return true when references to DECL must bind to current definition in
6810 The condition is usually equivalent to whether the function binds to the
6811 current module (shared library or executable), that is to binds_local_p.
6812 We use this fact to avoid need for another target hook and implement
6813 the logic using binds_local_p and just special cases where
6814 decl_binds_to_current_def_p is stronger than binds_local_p. In particular
6815 the weak definitions (that can be overwritten at linktime by other
6816 definition from different object file) and when resolution info is available
6817 we simply use the knowledge passed to us by linker plugin. */
6819 decl_binds_to_current_def_p (tree decl
)
6821 gcc_assert (DECL_P (decl
));
6822 if (!targetm
.binds_local_p (decl
))
6824 if (!TREE_PUBLIC (decl
))
6826 /* When resolution is available, just use it. */
6827 if (TREE_CODE (decl
) == VAR_DECL
6828 && (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)))
6830 varpool_node
*vnode
= varpool_get_node (decl
);
6832 && vnode
->resolution
!= LDPR_UNKNOWN
)
6833 return resolution_to_local_definition_p (vnode
->resolution
);
6835 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6837 struct cgraph_node
*node
= cgraph_get_node (decl
);
6839 && node
->resolution
!= LDPR_UNKNOWN
)
6840 return resolution_to_local_definition_p (node
->resolution
);
6842 /* Otherwise we have to assume the worst for DECL_WEAK (hidden weaks
6843 binds locally but still can be overwritten), DECL_COMMON (can be merged
6844 with a non-common definition somewhere in the same module) or
6846 This rely on fact that binds_local_p behave as decl_replaceable_p
6847 for all other declaration types. */
6848 if (DECL_WEAK (decl
))
6850 if (DECL_COMMON (decl
)
6851 && (DECL_INITIAL (decl
) == NULL
6852 || DECL_INITIAL (decl
) == error_mark_node
))
6854 if (DECL_EXTERNAL (decl
))
6859 /* A replaceable function or variable is one which may be replaced
6860 at link-time with an entirely different definition, provided that the
6861 replacement has the same type. For example, functions declared
6862 with __attribute__((weak)) on most systems are replaceable.
6864 COMDAT functions are not replaceable, since all definitions of the
6865 function must be equivalent. It is important that COMDAT functions
6866 not be treated as replaceable so that use of C++ template
6867 instantiations is not penalized. */
6870 decl_replaceable_p (tree decl
)
6872 gcc_assert (DECL_P (decl
));
6873 if (!TREE_PUBLIC (decl
) || DECL_COMDAT (decl
))
6875 return !decl_binds_to_current_def_p (decl
);
6878 /* Default function to output code that will globalize a label. A
6879 target must define GLOBAL_ASM_OP or provide its own function to
6880 globalize a label. */
6881 #ifdef GLOBAL_ASM_OP
6883 default_globalize_label (FILE * stream
, const char *name
)
6885 fputs (GLOBAL_ASM_OP
, stream
);
6886 assemble_name (stream
, name
);
6887 putc ('\n', stream
);
6889 #endif /* GLOBAL_ASM_OP */
6891 /* Default function to output code that will globalize a declaration. */
6893 default_globalize_decl_name (FILE * stream
, tree decl
)
6895 const char *name
= XSTR (XEXP (DECL_RTL (decl
), 0), 0);
6896 targetm
.asm_out
.globalize_label (stream
, name
);
6899 /* Default function to output a label for unwind information. The
6900 default is to do nothing. A target that needs nonlocal labels for
6901 unwind information must provide its own function to do this. */
6903 default_emit_unwind_label (FILE * stream ATTRIBUTE_UNUSED
,
6904 tree decl ATTRIBUTE_UNUSED
,
6905 int for_eh ATTRIBUTE_UNUSED
,
6906 int empty ATTRIBUTE_UNUSED
)
6910 /* Default function to output a label to divide up the exception table.
6911 The default is to do nothing. A target that needs/wants to divide
6912 up the table must provide it's own function to do this. */
6914 default_emit_except_table_label (FILE * stream ATTRIBUTE_UNUSED
)
6918 /* This is how to output an internal numbered label where PREFIX is
6919 the class of label and LABELNO is the number within the class. */
6922 default_generate_internal_label (char *buf
, const char *prefix
,
6923 unsigned long labelno
)
6925 ASM_GENERATE_INTERNAL_LABEL (buf
, prefix
, labelno
);
6928 /* This is how to output an internal numbered label where PREFIX is
6929 the class of label and LABELNO is the number within the class. */
6932 default_internal_label (FILE *stream
, const char *prefix
,
6933 unsigned long labelno
)
6935 char *const buf
= (char *) alloca (40 + strlen (prefix
));
6936 ASM_GENERATE_INTERNAL_LABEL (buf
, prefix
, labelno
);
6937 ASM_OUTPUT_INTERNAL_LABEL (stream
, buf
);
6941 /* The default implementation of ASM_DECLARE_CONSTANT_NAME. */
6944 default_asm_declare_constant_name (FILE *file
, const char *name
,
6945 const_tree exp ATTRIBUTE_UNUSED
,
6946 HOST_WIDE_INT size ATTRIBUTE_UNUSED
)
6948 assemble_label (file
, name
);
6951 /* This is the default behavior at the beginning of a file. It's
6952 controlled by two other target-hook toggles. */
6954 default_file_start (void)
6956 if (targetm
.asm_file_start_app_off
6957 && !(flag_verbose_asm
|| flag_debug_asm
|| flag_dump_rtl_in_asm
))
6958 fputs (ASM_APP_OFF
, asm_out_file
);
6960 if (targetm
.asm_file_start_file_directive
)
6961 output_file_directive (asm_out_file
, main_input_filename
);
6964 /* This is a generic routine suitable for use as TARGET_ASM_FILE_END
6965 which emits a special section directive used to indicate whether or
6966 not this object file needs an executable stack. This is primarily
6967 a GNU extension to ELF but could be used on other targets. */
6969 int trampolines_created
;
6972 file_end_indicate_exec_stack (void)
6974 unsigned int flags
= SECTION_DEBUG
;
6975 if (trampolines_created
)
6976 flags
|= SECTION_CODE
;
6978 switch_to_section (get_section (".note.GNU-stack", flags
, NULL
));
6981 /* Emit a special section directive to indicate that this object file
6982 was compiled with -fsplit-stack. This is used to let the linker
6983 detect calls between split-stack code and non-split-stack code, so
6984 that it can modify the split-stack code to allocate a sufficiently
6985 large stack. We emit another special section if there are any
6986 functions in this file which have the no_split_stack attribute, to
6987 prevent the linker from warning about being unable to convert the
6988 functions if they call non-split-stack code. */
6991 file_end_indicate_split_stack (void)
6993 if (flag_split_stack
)
6995 switch_to_section (get_section (".note.GNU-split-stack", SECTION_DEBUG
,
6997 if (saw_no_split_stack
)
6998 switch_to_section (get_section (".note.GNU-no-split-stack",
6999 SECTION_DEBUG
, NULL
));
7003 /* Output DIRECTIVE (a C string) followed by a newline. This is used as
7004 a get_unnamed_section callback. */
7007 output_section_asm_op (const void *directive
)
7009 fprintf (asm_out_file
, "%s\n", (const char *) directive
);
7012 /* Emit assembly code to switch to section NEW_SECTION. Do nothing if
7013 the current section is NEW_SECTION. */
7016 switch_to_section (section
*new_section
)
7018 if (in_section
== new_section
)
7021 if (new_section
->common
.flags
& SECTION_FORGET
)
7024 in_section
= new_section
;
7026 switch (SECTION_STYLE (new_section
))
7029 targetm
.asm_out
.named_section (new_section
->named
.name
,
7030 new_section
->named
.common
.flags
,
7031 new_section
->named
.decl
);
7034 case SECTION_UNNAMED
:
7035 new_section
->unnamed
.callback (new_section
->unnamed
.data
);
7038 case SECTION_NOSWITCH
:
7043 new_section
->common
.flags
|= SECTION_DECLARED
;
7046 /* If block symbol SYMBOL has not yet been assigned an offset, place
7047 it at the end of its block. */
7050 place_block_symbol (rtx symbol
)
7052 unsigned HOST_WIDE_INT size
, mask
, offset
;
7053 struct constant_descriptor_rtx
*desc
;
7054 unsigned int alignment
;
7055 struct object_block
*block
;
7058 gcc_assert (SYMBOL_REF_BLOCK (symbol
));
7059 if (SYMBOL_REF_BLOCK_OFFSET (symbol
) >= 0)
7062 /* Work out the symbol's size and alignment. */
7063 if (CONSTANT_POOL_ADDRESS_P (symbol
))
7065 desc
= SYMBOL_REF_CONSTANT (symbol
);
7066 alignment
= desc
->align
;
7067 size
= GET_MODE_SIZE (desc
->mode
);
7069 else if (TREE_CONSTANT_POOL_ADDRESS_P (symbol
))
7071 decl
= SYMBOL_REF_DECL (symbol
);
7072 alignment
= DECL_ALIGN (decl
);
7073 size
= get_constant_size (DECL_INITIAL (decl
));
7074 if ((flag_sanitize
& SANITIZE_ADDRESS
)
7075 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
7076 && asan_protect_global (DECL_INITIAL (decl
)))
7077 size
+= asan_red_zone_size (size
);
7081 decl
= SYMBOL_REF_DECL (symbol
);
7082 alignment
= get_variable_align (decl
);
7083 size
= tree_to_uhwi (DECL_SIZE_UNIT (decl
));
7084 if ((flag_sanitize
& SANITIZE_ADDRESS
)
7085 && asan_protect_global (decl
))
7087 size
+= asan_red_zone_size (size
);
7088 alignment
= MAX (alignment
,
7089 ASAN_RED_ZONE_SIZE
* BITS_PER_UNIT
);
7093 /* Calculate the object's offset from the start of the block. */
7094 block
= SYMBOL_REF_BLOCK (symbol
);
7095 mask
= alignment
/ BITS_PER_UNIT
- 1;
7096 offset
= (block
->size
+ mask
) & ~mask
;
7097 SYMBOL_REF_BLOCK_OFFSET (symbol
) = offset
;
7099 /* Record the block's new alignment and size. */
7100 block
->alignment
= MAX (block
->alignment
, alignment
);
7101 block
->size
= offset
+ size
;
7103 vec_safe_push (block
->objects
, symbol
);
7106 /* Return the anchor that should be used to address byte offset OFFSET
7107 from the first object in BLOCK. MODEL is the TLS model used
7111 get_section_anchor (struct object_block
*block
, HOST_WIDE_INT offset
,
7112 enum tls_model model
)
7115 unsigned int begin
, middle
, end
;
7116 unsigned HOST_WIDE_INT min_offset
, max_offset
, range
, bias
, delta
;
7119 /* Work out the anchor's offset. Use an offset of 0 for the first
7120 anchor so that we don't pessimize the case where we take the address
7121 of a variable at the beginning of the block. This is particularly
7122 useful when a block has only one variable assigned to it.
7124 We try to place anchors RANGE bytes apart, so there can then be
7125 anchors at +/-RANGE, +/-2 * RANGE, and so on, up to the limits of
7126 a ptr_mode offset. With some target settings, the lowest such
7127 anchor might be out of range for the lowest ptr_mode offset;
7128 likewise the highest anchor for the highest offset. Use anchors
7129 at the extreme ends of the ptr_mode range in such cases.
7131 All arithmetic uses unsigned integers in order to avoid
7133 max_offset
= (unsigned HOST_WIDE_INT
) targetm
.max_anchor_offset
;
7134 min_offset
= (unsigned HOST_WIDE_INT
) targetm
.min_anchor_offset
;
7135 range
= max_offset
- min_offset
+ 1;
7140 bias
= 1 << (GET_MODE_BITSIZE (ptr_mode
) - 1);
7143 delta
= -(unsigned HOST_WIDE_INT
) offset
+ max_offset
;
7144 delta
-= delta
% range
;
7147 offset
= (HOST_WIDE_INT
) (-delta
);
7151 delta
= (unsigned HOST_WIDE_INT
) offset
- min_offset
;
7152 delta
-= delta
% range
;
7153 if (delta
> bias
- 1)
7155 offset
= (HOST_WIDE_INT
) delta
;
7159 /* Do a binary search to see if there's already an anchor we can use.
7160 Set BEGIN to the new anchor's index if not. */
7162 end
= vec_safe_length (block
->anchors
);
7163 while (begin
!= end
)
7165 middle
= (end
+ begin
) / 2;
7166 anchor
= (*block
->anchors
)[middle
];
7167 if (SYMBOL_REF_BLOCK_OFFSET (anchor
) > offset
)
7169 else if (SYMBOL_REF_BLOCK_OFFSET (anchor
) < offset
)
7171 else if (SYMBOL_REF_TLS_MODEL (anchor
) > model
)
7173 else if (SYMBOL_REF_TLS_MODEL (anchor
) < model
)
7179 /* Create a new anchor with a unique label. */
7180 ASM_GENERATE_INTERNAL_LABEL (label
, "LANCHOR", anchor_labelno
++);
7181 anchor
= create_block_symbol (ggc_strdup (label
), block
, offset
);
7182 SYMBOL_REF_FLAGS (anchor
) |= SYMBOL_FLAG_LOCAL
| SYMBOL_FLAG_ANCHOR
;
7183 SYMBOL_REF_FLAGS (anchor
) |= model
<< SYMBOL_FLAG_TLS_SHIFT
;
7185 /* Insert it at index BEGIN. */
7186 vec_safe_insert (block
->anchors
, begin
, anchor
);
7190 /* Output the objects in BLOCK. */
7193 output_object_block (struct object_block
*block
)
7195 struct constant_descriptor_rtx
*desc
;
7197 HOST_WIDE_INT offset
;
7201 if (!block
->objects
)
7204 /* Switch to the section and make sure that the first byte is
7205 suitably aligned. */
7206 switch_to_section (block
->sect
);
7207 assemble_align (block
->alignment
);
7209 /* Define the values of all anchors relative to the current section
7211 FOR_EACH_VEC_SAFE_ELT (block
->anchors
, i
, symbol
)
7212 targetm
.asm_out
.output_anchor (symbol
);
7214 /* Output the objects themselves. */
7216 FOR_EACH_VEC_ELT (*block
->objects
, i
, symbol
)
7218 /* Move to the object's offset, padding with zeros if necessary. */
7219 assemble_zeros (SYMBOL_REF_BLOCK_OFFSET (symbol
) - offset
);
7220 offset
= SYMBOL_REF_BLOCK_OFFSET (symbol
);
7221 if (CONSTANT_POOL_ADDRESS_P (symbol
))
7223 desc
= SYMBOL_REF_CONSTANT (symbol
);
7224 output_constant_pool_1 (desc
, 1);
7225 offset
+= GET_MODE_SIZE (desc
->mode
);
7227 else if (TREE_CONSTANT_POOL_ADDRESS_P (symbol
))
7230 decl
= SYMBOL_REF_DECL (symbol
);
7231 assemble_constant_contents (DECL_INITIAL (decl
), XSTR (symbol
, 0),
7233 size
= get_constant_size (DECL_INITIAL (decl
));
7235 if ((flag_sanitize
& SANITIZE_ADDRESS
)
7236 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
7237 && asan_protect_global (DECL_INITIAL (decl
)))
7239 size
= asan_red_zone_size (size
);
7240 assemble_zeros (size
);
7247 decl
= SYMBOL_REF_DECL (symbol
);
7248 assemble_variable_contents (decl
, XSTR (symbol
, 0), false);
7249 size
= tree_to_uhwi (DECL_SIZE_UNIT (decl
));
7251 if ((flag_sanitize
& SANITIZE_ADDRESS
)
7252 && asan_protect_global (decl
))
7254 size
= asan_red_zone_size (size
);
7255 assemble_zeros (size
);
7262 /* A htab_traverse callback used to call output_object_block for
7263 each member of object_block_htab. */
7266 output_object_block_htab (void **slot
, void *data ATTRIBUTE_UNUSED
)
7268 output_object_block ((struct object_block
*) (*slot
));
7272 /* Output the definitions of all object_blocks. */
7275 output_object_blocks (void)
7277 htab_traverse (object_block_htab
, output_object_block_htab
, NULL
);
7280 /* This function provides a possible implementation of the
7281 TARGET_ASM_RECORD_GCC_SWITCHES target hook for ELF targets. When triggered
7282 by -frecord-gcc-switches it creates a new mergeable, string section in the
7283 assembler output file called TARGET_ASM_RECORD_GCC_SWITCHES_SECTION which
7284 contains the switches in ASCII format.
7286 FIXME: This code does not correctly handle double quote characters
7287 that appear inside strings, (it strips them rather than preserving them).
7288 FIXME: ASM_OUTPUT_ASCII, as defined in config/elfos.h will not emit NUL
7289 characters - instead it treats them as sub-string separators. Since
7290 we want to emit NUL strings terminators into the object file we have to use
7294 elf_record_gcc_switches (print_switch_type type
, const char * name
)
7298 case SWITCH_TYPE_PASSED
:
7299 ASM_OUTPUT_ASCII (asm_out_file
, name
, strlen (name
));
7300 ASM_OUTPUT_SKIP (asm_out_file
, (unsigned HOST_WIDE_INT
) 1);
7303 case SWITCH_TYPE_DESCRIPTIVE
:
7306 /* Distinguish between invocations where name is NULL. */
7307 static bool started
= false;
7313 sec
= get_section (targetm
.asm_out
.record_gcc_switches_section
,
7317 | (SECTION_ENTSIZE
& 1),
7319 switch_to_section (sec
);
7328 /* The return value is currently ignored by the caller, but must be 0.
7329 For -fverbose-asm the return value would be the number of characters
7330 emitted into the assembler file. */
7334 /* Emit text to declare externally defined symbols. It is needed to
7335 properly support non-default visibility. */
7337 default_elf_asm_output_external (FILE *file ATTRIBUTE_UNUSED
,
7339 const char *name ATTRIBUTE_UNUSED
)
7341 /* We output the name if and only if TREE_SYMBOL_REFERENCED is
7342 set in order to avoid putting out names that are never really
7344 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))
7345 && targetm
.binds_local_p (decl
))
7346 maybe_assemble_visibility (decl
);
7349 /* The default hook for TARGET_ASM_OUTPUT_SOURCE_FILENAME. */
7352 default_asm_output_source_filename (FILE *file
, const char *name
)
7354 #ifdef ASM_OUTPUT_SOURCE_FILENAME
7355 ASM_OUTPUT_SOURCE_FILENAME (file
, name
);
7357 fprintf (file
, "\t.file\t");
7358 output_quoted_string (file
, name
);
7363 /* Output a file name in the form wanted by System V. */
7366 output_file_directive (FILE *asm_file
, const char *input_name
)
7371 if (input_name
== NULL
)
7372 input_name
= "<stdin>";
7374 input_name
= remap_debug_filename (input_name
);
7376 len
= strlen (input_name
);
7377 na
= input_name
+ len
;
7379 /* NA gets INPUT_NAME sans directory names. */
7380 while (na
> input_name
)
7382 if (IS_DIR_SEPARATOR (na
[-1]))
7387 targetm
.asm_out
.output_source_filename (asm_file
, na
);
7390 /* Create a DEBUG_EXPR_DECL / DEBUG_EXPR pair from RTL expression
7393 make_debug_expr_from_rtl (const_rtx exp
)
7395 tree ddecl
= make_node (DEBUG_EXPR_DECL
), type
;
7396 enum machine_mode mode
= GET_MODE (exp
);
7399 DECL_ARTIFICIAL (ddecl
) = 1;
7400 if (REG_P (exp
) && REG_EXPR (exp
))
7401 type
= TREE_TYPE (REG_EXPR (exp
));
7402 else if (MEM_P (exp
) && MEM_EXPR (exp
))
7403 type
= TREE_TYPE (MEM_EXPR (exp
));
7406 if (type
&& TYPE_MODE (type
) == mode
)
7407 TREE_TYPE (ddecl
) = type
;
7409 TREE_TYPE (ddecl
) = lang_hooks
.types
.type_for_mode (mode
, 1);
7410 DECL_MODE (ddecl
) = mode
;
7411 dval
= gen_rtx_DEBUG_EXPR (mode
);
7412 DEBUG_EXPR_TREE_DECL (dval
) = ddecl
;
7413 SET_DECL_RTL (ddecl
, dval
);
7417 #ifdef ELF_ASCII_ESCAPES
7418 /* Default ASM_OUTPUT_LIMITED_STRING for ELF targets. */
7421 default_elf_asm_output_limited_string (FILE *f
, const char *s
)
7426 fputs (STRING_ASM_OP
, f
);
7431 escape
= ELF_ASCII_ESCAPES
[c
];
7438 /* TODO: Print in hex with fast function, important for -flto. */
7439 fprintf (f
, "\\%03o", c
);
7452 /* Default ASM_OUTPUT_ASCII for ELF targets. */
7455 default_elf_asm_output_ascii (FILE *f
, const char *s
, unsigned int len
)
7457 const char *limit
= s
+ len
;
7458 const char *last_null
= NULL
;
7459 unsigned bytes_in_chunk
= 0;
7463 for (; s
< limit
; s
++)
7467 if (bytes_in_chunk
>= 60)
7476 for (p
= s
; p
< limit
&& *p
!= '\0'; p
++)
7483 if (p
< limit
&& (p
- s
) <= (long) ELF_STRING_LIMIT
)
7485 if (bytes_in_chunk
> 0)
7492 default_elf_asm_output_limited_string (f
, s
);
7497 if (bytes_in_chunk
== 0)
7498 fputs (ASCII_DATA_ASM_OP
"\"", f
);
7501 escape
= ELF_ASCII_ESCAPES
[c
];
7509 /* TODO: Print in hex with fast function, important for -flto. */
7510 fprintf (f
, "\\%03o", c
);
7511 bytes_in_chunk
+= 4;
7516 bytes_in_chunk
+= 2;
7523 if (bytes_in_chunk
> 0)
7531 static GTY(()) section
*elf_init_array_section
;
7532 static GTY(()) section
*elf_fini_array_section
;
7535 get_elf_initfini_array_priority_section (int priority
,
7539 if (priority
!= DEFAULT_INIT_PRIORITY
)
7542 sprintf (buf
, "%s.%.5u",
7543 constructor_p
? ".init_array" : ".fini_array",
7545 sec
= get_section (buf
, SECTION_WRITE
| SECTION_NOTYPE
, NULL_TREE
);
7551 if (elf_init_array_section
== NULL
)
7552 elf_init_array_section
7553 = get_section (".init_array",
7554 SECTION_WRITE
| SECTION_NOTYPE
, NULL_TREE
);
7555 sec
= elf_init_array_section
;
7559 if (elf_fini_array_section
== NULL
)
7560 elf_fini_array_section
7561 = get_section (".fini_array",
7562 SECTION_WRITE
| SECTION_NOTYPE
, NULL_TREE
);
7563 sec
= elf_fini_array_section
;
7569 /* Use .init_array section for constructors. */
7572 default_elf_init_array_asm_out_constructor (rtx symbol
, int priority
)
7574 section
*sec
= get_elf_initfini_array_priority_section (priority
,
7576 assemble_addr_to_section (symbol
, sec
);
7579 /* Use .fini_array section for destructors. */
7582 default_elf_fini_array_asm_out_destructor (rtx symbol
, int priority
)
7584 section
*sec
= get_elf_initfini_array_priority_section (priority
,
7586 assemble_addr_to_section (symbol
, sec
);
7589 /* Default TARGET_ASM_OUTPUT_IDENT hook.
7591 This is a bit of a cheat. The real default is a no-op, but this
7592 hook is the default for all targets with a .ident directive. */
7595 default_asm_output_ident_directive (const char *ident_str
)
7597 const char *ident_asm_op
= "\t.ident\t";
7599 /* If we are still in the front end, do not write out the string
7600 to asm_out_file. Instead, add a fake top-level asm statement.
7601 This allows the front ends to use this hook without actually
7602 writing to asm_out_file, to handle #ident or Pragma Ident. */
7603 if (cgraph_state
== CGRAPH_STATE_PARSING
)
7605 char *buf
= ACONCAT ((ident_asm_op
, "\"", ident_str
, "\"\n", NULL
));
7606 add_asm_node (build_string (strlen (buf
), buf
));
7609 fprintf (asm_out_file
, "%s\"%s\"\n", ident_asm_op
, ident_str
);
7612 #include "gt-varasm.h"