1 /* Output variables, constants and external declarations, for GNU compiler.
2 Copyright (C) 1987-2013 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"
37 #include "hard-reg-set.h"
40 #include "diagnostic-core.h"
43 #include "langhooks.h"
47 #include "common/common-target.h"
48 #include "targhooks.h"
49 #include "tree-mudflap.h"
51 #include "pointer-set.h"
53 #include "basic-block.h"
55 #ifdef XCOFF_DEBUGGING_INFO
56 #include "xcoffout.h" /* Needed for external data
57 declarations for e.g. AIX 4.x. */
60 /* The (assembler) name of the first globally-visible object output. */
61 extern GTY(()) const char *first_global_object_name
;
62 extern GTY(()) const char *weak_global_object_name
;
64 const char *first_global_object_name
;
65 const char *weak_global_object_name
;
68 struct constant_descriptor_rtx
;
69 struct rtx_constant_pool
;
71 #define n_deferred_constants (crtl->varasm.deferred_constants)
73 /* Number for making the label on the next
74 constant that is stored in memory. */
76 static GTY(()) int const_labelno
;
78 /* Carry information from ASM_DECLARE_OBJECT_NAME
79 to ASM_FINISH_DECLARE_OBJECT. */
81 int size_directive_output
;
83 /* The last decl for which assemble_variable was called,
84 if it did ASM_DECLARE_OBJECT_NAME.
85 If the last call to assemble_variable didn't do that,
88 tree last_assemble_variable_decl
;
90 /* The following global variable indicates if the first basic block
91 in a function belongs to the cold partition or not. */
93 bool first_function_block_is_cold
;
95 /* We give all constants their own alias set. Perhaps redundant with
96 MEM_READONLY_P, but pre-dates it. */
98 static alias_set_type const_alias_set
;
100 /* Whether we saw any functions with no_split_stack. */
102 static bool saw_no_split_stack
;
104 static const char *strip_reg_name (const char *);
105 static int contains_pointers_p (tree
);
106 #ifdef ASM_OUTPUT_EXTERNAL
107 static bool incorporeal_function_p (tree
);
109 static void decode_addr_const (tree
, struct addr_const
*);
110 static hashval_t
const_desc_hash (const void *);
111 static int const_desc_eq (const void *, const void *);
112 static hashval_t
const_hash_1 (const tree
);
113 static int compare_constant (const tree
, const tree
);
114 static tree
copy_constant (tree
);
115 static void output_constant_def_contents (rtx
);
116 static void output_addressed_constants (tree
);
117 static unsigned HOST_WIDE_INT
array_size_for_constructor (tree
);
118 static unsigned min_align (unsigned, unsigned);
119 static void globalize_decl (tree
);
120 static bool decl_readonly_section_1 (enum section_category
);
121 #ifdef BSS_SECTION_ASM_OP
122 #ifdef ASM_OUTPUT_ALIGNED_BSS
123 static void asm_output_aligned_bss (FILE *, tree
, const char *,
124 unsigned HOST_WIDE_INT
, int)
127 #endif /* BSS_SECTION_ASM_OP */
128 static void mark_weak (tree
);
129 static void output_constant_pool (const char *, tree
);
131 /* Well-known sections, each one associated with some sort of *_ASM_OP. */
132 section
*text_section
;
133 section
*data_section
;
134 section
*readonly_data_section
;
135 section
*sdata_section
;
136 section
*ctors_section
;
137 section
*dtors_section
;
138 section
*bss_section
;
139 section
*sbss_section
;
141 /* Various forms of common section. All are guaranteed to be nonnull. */
142 section
*tls_comm_section
;
143 section
*comm_section
;
144 section
*lcomm_section
;
146 /* A SECTION_NOSWITCH section used for declaring global BSS variables.
148 section
*bss_noswitch_section
;
150 /* The section that holds the main exception table, when known. The section
151 is set either by the target's init_sections hook or by the first call to
152 switch_to_exception_section. */
153 section
*exception_section
;
155 /* The section that holds the DWARF2 frame unwind information, when known.
156 The section is set either by the target's init_sections hook or by the
157 first call to switch_to_eh_frame_section. */
158 section
*eh_frame_section
;
160 /* asm_out_file's current section. This is NULL if no section has yet
161 been selected or if we lose track of what the current section is. */
164 /* True if code for the current function is currently being directed
165 at the cold section. */
166 bool in_cold_section_p
;
168 /* A linked list of all the unnamed sections. */
169 static GTY(()) section
*unnamed_sections
;
171 /* Return a nonzero value if DECL has a section attribute. */
172 #define IN_NAMED_SECTION(DECL) \
173 ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \
174 && DECL_SECTION_NAME (DECL) != NULL_TREE)
176 /* Hash table of named sections. */
177 static GTY((param_is (section
))) htab_t section_htab
;
179 /* A table of object_blocks, indexed by section. */
180 static GTY((param_is (struct object_block
))) htab_t object_block_htab
;
182 /* The next number to use for internal anchor labels. */
183 static GTY(()) int anchor_labelno
;
185 /* A pool of constants that can be shared between functions. */
186 static GTY(()) struct rtx_constant_pool
*shared_constant_pool
;
188 /* Helper routines for maintaining section_htab. */
191 section_entry_eq (const void *p1
, const void *p2
)
193 const section
*old
= (const section
*) p1
;
194 const char *new_name
= (const char *) p2
;
196 return strcmp (old
->named
.name
, new_name
) == 0;
200 section_entry_hash (const void *p
)
202 const section
*old
= (const section
*) p
;
203 return htab_hash_string (old
->named
.name
);
206 /* Return a hash value for section SECT. */
209 hash_section (section
*sect
)
211 if (sect
->common
.flags
& SECTION_NAMED
)
212 return htab_hash_string (sect
->named
.name
);
213 return sect
->common
.flags
;
216 /* Helper routines for maintaining object_block_htab. */
219 object_block_entry_eq (const void *p1
, const void *p2
)
221 const struct object_block
*old
= (const struct object_block
*) p1
;
222 const section
*new_section
= (const section
*) p2
;
224 return old
->sect
== new_section
;
228 object_block_entry_hash (const void *p
)
230 const struct object_block
*old
= (const struct object_block
*) p
;
231 return hash_section (old
->sect
);
234 /* Return a new unnamed section with the given fields. */
237 get_unnamed_section (unsigned int flags
, void (*callback
) (const void *),
242 sect
= ggc_alloc_section ();
243 sect
->unnamed
.common
.flags
= flags
| SECTION_UNNAMED
;
244 sect
->unnamed
.callback
= callback
;
245 sect
->unnamed
.data
= data
;
246 sect
->unnamed
.next
= unnamed_sections
;
248 unnamed_sections
= sect
;
252 /* Return a SECTION_NOSWITCH section with the given fields. */
255 get_noswitch_section (unsigned int flags
, noswitch_section_callback callback
)
259 sect
= ggc_alloc_section ();
260 sect
->noswitch
.common
.flags
= flags
| SECTION_NOSWITCH
;
261 sect
->noswitch
.callback
= callback
;
266 /* Return the named section structure associated with NAME. Create
267 a new section with the given fields if no such structure exists. */
270 get_section (const char *name
, unsigned int flags
, tree decl
)
272 section
*sect
, **slot
;
275 htab_find_slot_with_hash (section_htab
, name
,
276 htab_hash_string (name
), INSERT
);
277 flags
|= SECTION_NAMED
;
280 sect
= ggc_alloc_section ();
281 sect
->named
.common
.flags
= flags
;
282 sect
->named
.name
= ggc_strdup (name
);
283 sect
->named
.decl
= decl
;
289 if ((sect
->common
.flags
& ~SECTION_DECLARED
) != flags
290 && ((sect
->common
.flags
| flags
) & SECTION_OVERRIDE
) == 0)
292 /* It is fine if one of the section flags is
293 SECTION_WRITE | SECTION_RELRO and the other has none of these
294 flags (i.e. read-only) in named sections and either the
295 section hasn't been declared yet or has been declared as writable.
296 In that case just make sure the resulting flags are
297 SECTION_WRITE | SECTION_RELRO, ie. writable only because of
299 if (((sect
->common
.flags
^ flags
) & (SECTION_WRITE
| SECTION_RELRO
))
300 == (SECTION_WRITE
| SECTION_RELRO
)
301 && (sect
->common
.flags
302 & ~(SECTION_DECLARED
| SECTION_WRITE
| SECTION_RELRO
))
303 == (flags
& ~(SECTION_WRITE
| SECTION_RELRO
))
304 && ((sect
->common
.flags
& SECTION_DECLARED
) == 0
305 || (sect
->common
.flags
& SECTION_WRITE
)))
307 sect
->common
.flags
|= (SECTION_WRITE
| SECTION_RELRO
);
310 /* Sanity check user variables for flag changes. */
311 if (sect
->named
.decl
!= NULL
312 && DECL_P (sect
->named
.decl
)
313 && decl
!= sect
->named
.decl
)
315 if (decl
!= NULL
&& DECL_P (decl
))
316 error ("%+D causes a section type conflict with %D",
317 decl
, sect
->named
.decl
);
319 error ("section type conflict with %D", sect
->named
.decl
);
320 inform (DECL_SOURCE_LOCATION (sect
->named
.decl
),
321 "%qD was declared here", sect
->named
.decl
);
323 else if (decl
!= NULL
&& DECL_P (decl
))
324 error ("%+D causes a section type conflict", decl
);
326 error ("section type conflict");
327 /* Make sure we don't error about one section multiple times. */
328 sect
->common
.flags
|= SECTION_OVERRIDE
;
334 /* Return true if the current compilation mode benefits from having
335 objects grouped into blocks. */
338 use_object_blocks_p (void)
340 return flag_section_anchors
;
343 /* Return the object_block structure for section SECT. Create a new
344 structure if we haven't created one already. Return null if SECT
347 static struct object_block
*
348 get_block_for_section (section
*sect
)
350 struct object_block
*block
;
356 slot
= htab_find_slot_with_hash (object_block_htab
, sect
,
357 hash_section (sect
), INSERT
);
358 block
= (struct object_block
*) *slot
;
361 block
= ggc_alloc_cleared_object_block ();
368 /* Create a symbol with label LABEL and place it at byte offset
369 OFFSET in BLOCK. OFFSET can be negative if the symbol's offset
370 is not yet known. LABEL must be a garbage-collected string. */
373 create_block_symbol (const char *label
, struct object_block
*block
,
374 HOST_WIDE_INT offset
)
379 /* Create the extended SYMBOL_REF. */
380 size
= RTX_HDR_SIZE
+ sizeof (struct block_symbol
);
381 symbol
= ggc_alloc_rtx_def (size
);
383 /* Initialize the normal SYMBOL_REF fields. */
384 memset (symbol
, 0, size
);
385 PUT_CODE (symbol
, SYMBOL_REF
);
386 PUT_MODE (symbol
, Pmode
);
387 XSTR (symbol
, 0) = label
;
388 SYMBOL_REF_FLAGS (symbol
) = SYMBOL_FLAG_HAS_BLOCK_INFO
;
390 /* Initialize the block_symbol stuff. */
391 SYMBOL_REF_BLOCK (symbol
) = block
;
392 SYMBOL_REF_BLOCK_OFFSET (symbol
) = offset
;
397 /* Return a section with a particular name and with whatever SECTION_*
398 flags section_type_flags deems appropriate. The name of the section
399 is taken from NAME if nonnull, otherwise it is taken from DECL's
400 DECL_SECTION_NAME. DECL is the decl associated with the section
401 (see the section comment for details) and RELOC is as for
402 section_type_flags. */
405 get_named_section (tree decl
, const char *name
, int reloc
)
411 gcc_assert (decl
&& DECL_P (decl
) && DECL_SECTION_NAME (decl
));
412 name
= TREE_STRING_POINTER (DECL_SECTION_NAME (decl
));
415 flags
= targetm
.section_type_flags (decl
, name
, reloc
);
416 return get_section (name
, flags
, decl
);
419 /* If required, set DECL_SECTION_NAME to a unique name. */
422 resolve_unique_section (tree decl
, int reloc ATTRIBUTE_UNUSED
,
423 int flag_function_or_data_sections
)
425 if (DECL_SECTION_NAME (decl
) == NULL_TREE
426 && targetm_common
.have_named_sections
427 && (flag_function_or_data_sections
428 || DECL_ONE_ONLY (decl
)))
430 targetm
.asm_out
.unique_section (decl
, reloc
);
431 DECL_HAS_IMPLICIT_SECTION_NAME_P (decl
) = true;
435 #ifdef BSS_SECTION_ASM_OP
437 #ifdef ASM_OUTPUT_ALIGNED_BSS
439 /* Utility function for targets to use in implementing
440 ASM_OUTPUT_ALIGNED_BSS.
441 ??? It is believed that this function will work in most cases so such
442 support is localized here. */
445 asm_output_aligned_bss (FILE *file
, tree decl ATTRIBUTE_UNUSED
,
446 const char *name
, unsigned HOST_WIDE_INT size
,
449 switch_to_section (bss_section
);
450 ASM_OUTPUT_ALIGN (file
, floor_log2 (align
/ BITS_PER_UNIT
));
451 #ifdef ASM_DECLARE_OBJECT_NAME
452 last_assemble_variable_decl
= decl
;
453 ASM_DECLARE_OBJECT_NAME (file
, name
, decl
);
455 /* Standard thing is just output label for the object. */
456 ASM_OUTPUT_LABEL (file
, name
);
457 #endif /* ASM_DECLARE_OBJECT_NAME */
458 ASM_OUTPUT_SKIP (file
, size
? size
: 1);
463 #endif /* BSS_SECTION_ASM_OP */
465 #ifndef USE_SELECT_SECTION_FOR_FUNCTIONS
466 /* Return the hot section for function DECL. Return text_section for
470 hot_function_section (tree decl
)
472 if (decl
!= NULL_TREE
473 && DECL_SECTION_NAME (decl
) != NULL_TREE
474 && targetm_common
.have_named_sections
)
475 return get_named_section (decl
, NULL
, 0);
481 /* Return section for TEXT_SECTION_NAME if DECL or DECL_SECTION_NAME (DECL)
484 When DECL_SECTION_NAME is non-NULL and it is implicit section and
485 NAMED_SECTION_SUFFIX is non-NULL, then produce section called
486 concatenate the name with NAMED_SECTION_SUFFIX.
487 Otherwise produce "TEXT_SECTION_NAME.IMPLICIT_NAME". */
490 get_named_text_section (tree decl
,
491 const char *text_section_name
,
492 const char *named_section_suffix
)
494 if (decl
&& DECL_SECTION_NAME (decl
))
496 if (named_section_suffix
)
498 tree dsn
= DECL_SECTION_NAME (decl
);
499 const char *stripped_name
;
502 name
= (char *) alloca (TREE_STRING_LENGTH (dsn
) + 1);
503 memcpy (name
, TREE_STRING_POINTER (dsn
),
504 TREE_STRING_LENGTH (dsn
) + 1);
506 stripped_name
= targetm
.strip_name_encoding (name
);
508 buffer
= ACONCAT ((stripped_name
, named_section_suffix
, NULL
));
509 return get_named_section (decl
, buffer
, 0);
511 else if (DECL_HAS_IMPLICIT_SECTION_NAME_P (decl
))
515 /* Do not try to split gnu_linkonce functions. This gets somewhat
517 if (DECL_ONE_ONLY (decl
) && !HAVE_COMDAT_GROUP
)
519 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
520 name
= targetm
.strip_name_encoding (name
);
521 return get_named_section (decl
, ACONCAT ((text_section_name
, ".",
527 return get_named_section (decl
, text_section_name
, 0);
530 /* Choose named function section based on its frequency. */
533 default_function_section (tree decl
, enum node_frequency freq
,
534 bool startup
, bool exit
)
536 #if defined HAVE_LD_EH_GC_SECTIONS && defined HAVE_LD_EH_GC_SECTIONS_BUG
537 /* Old GNU linkers have buggy --gc-section support, which sometimes
538 results in .gcc_except_table* sections being garbage collected. */
540 && DECL_SECTION_NAME (decl
)
541 && DECL_HAS_IMPLICIT_SECTION_NAME_P (decl
))
545 if (!flag_reorder_functions
546 || !targetm_common
.have_named_sections
)
548 /* Startup code should go to startup subsection unless it is
549 unlikely executed (this happens especially with function splitting
550 where we can split away unnecessary parts of static constructors. */
551 if (startup
&& freq
!= NODE_FREQUENCY_UNLIKELY_EXECUTED
)
552 return get_named_text_section (decl
, ".text.startup", NULL
);
554 /* Similarly for exit. */
555 if (exit
&& freq
!= NODE_FREQUENCY_UNLIKELY_EXECUTED
)
556 return get_named_text_section (decl
, ".text.exit", NULL
);
558 /* Group cold functions together, similarly for hot code. */
561 case NODE_FREQUENCY_UNLIKELY_EXECUTED
:
562 return get_named_text_section (decl
, ".text.unlikely", NULL
);
563 case NODE_FREQUENCY_HOT
:
564 return get_named_text_section (decl
, ".text.hot", NULL
);
570 /* Return the section for function DECL.
572 If DECL is NULL_TREE, return the text section. We can be passed
573 NULL_TREE under some circumstances by dbxout.c at least.
575 If FORCE_COLD is true, return cold function section ignoring
576 the frequency info of cgraph_node. */
579 function_section_1 (tree decl
, bool force_cold
)
581 section
*section
= NULL
;
582 enum node_frequency freq
= NODE_FREQUENCY_NORMAL
;
583 bool startup
= false, exit
= false;
587 struct cgraph_node
*node
= cgraph_get_node (decl
);
591 freq
= node
->frequency
;
592 startup
= node
->only_called_at_startup
;
593 exit
= node
->only_called_at_exit
;
597 freq
= NODE_FREQUENCY_UNLIKELY_EXECUTED
;
599 #ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
600 if (decl
!= NULL_TREE
601 && DECL_SECTION_NAME (decl
) != NULL_TREE
)
603 if (targetm
.asm_out
.function_section
)
604 section
= targetm
.asm_out
.function_section (decl
, freq
,
608 return get_named_section (decl
, NULL
, 0);
611 return targetm
.asm_out
.select_section
612 (decl
, freq
== NODE_FREQUENCY_UNLIKELY_EXECUTED
,
615 if (targetm
.asm_out
.function_section
)
616 section
= targetm
.asm_out
.function_section (decl
, freq
, startup
, exit
);
619 return hot_function_section (decl
);
623 /* Return the section for function DECL.
625 If DECL is NULL_TREE, return the text section. We can be passed
626 NULL_TREE under some circumstances by dbxout.c at least. */
629 function_section (tree decl
)
631 /* Handle cases where function splitting code decides
632 to put function entry point into unlikely executed section
633 despite the fact that the function itself is not cold
634 (i.e. it is called rarely but contains a hot loop that is
635 better to live in hot subsection for the code locality). */
636 return function_section_1 (decl
,
637 first_function_block_is_cold
);
640 /* Return the section for the current function, take IN_COLD_SECTION_P
644 current_function_section (void)
646 return function_section_1 (current_function_decl
, in_cold_section_p
);
649 /* Tell assembler to switch to unlikely-to-be-executed text section. */
652 unlikely_text_section (void)
654 return function_section_1 (current_function_decl
, true);
657 /* When called within a function context, return true if the function
658 has been assigned a cold text section and if SECT is that section.
659 When called outside a function context, return true if SECT is the
660 default cold section. */
663 unlikely_text_section_p (section
*sect
)
665 return sect
== function_section_1 (current_function_decl
, true);
668 /* Return the read-only data section associated with function DECL. */
671 default_function_rodata_section (tree decl
)
673 if (decl
!= NULL_TREE
&& DECL_SECTION_NAME (decl
))
675 const char *name
= TREE_STRING_POINTER (DECL_SECTION_NAME (decl
));
677 if (DECL_ONE_ONLY (decl
) && HAVE_COMDAT_GROUP
)
683 dot
= strchr (name
+ 1, '.');
686 len
= strlen (dot
) + 8;
687 rname
= (char *) alloca (len
);
689 strcpy (rname
, ".rodata");
691 return get_section (rname
, SECTION_LINKONCE
, decl
);
693 /* For .gnu.linkonce.t.foo we want to use .gnu.linkonce.r.foo. */
694 else if (DECL_ONE_ONLY (decl
)
695 && strncmp (name
, ".gnu.linkonce.t.", 16) == 0)
697 size_t len
= strlen (name
) + 1;
698 char *rname
= (char *) alloca (len
);
700 memcpy (rname
, name
, len
);
702 return get_section (rname
, SECTION_LINKONCE
, decl
);
704 /* For .text.foo we want to use .rodata.foo. */
705 else if (flag_function_sections
&& flag_data_sections
706 && strncmp (name
, ".text.", 6) == 0)
708 size_t len
= strlen (name
) + 1;
709 char *rname
= (char *) alloca (len
+ 2);
711 memcpy (rname
, ".rodata", 7);
712 memcpy (rname
+ 7, name
+ 5, len
- 5);
713 return get_section (rname
, 0, decl
);
717 return readonly_data_section
;
720 /* Return the read-only data section associated with function DECL
721 for targets where that section should be always the single
722 readonly data section. */
725 default_no_function_rodata_section (tree decl ATTRIBUTE_UNUSED
)
727 return readonly_data_section
;
730 /* Return the section to use for string merging. */
733 mergeable_string_section (tree decl ATTRIBUTE_UNUSED
,
734 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
,
735 unsigned int flags ATTRIBUTE_UNUSED
)
739 if (HAVE_GAS_SHF_MERGE
&& flag_merge_constants
740 && TREE_CODE (decl
) == STRING_CST
741 && TREE_CODE (TREE_TYPE (decl
)) == ARRAY_TYPE
743 && (len
= int_size_in_bytes (TREE_TYPE (decl
))) > 0
744 && TREE_STRING_LENGTH (decl
) >= len
)
746 enum machine_mode mode
;
747 unsigned int modesize
;
751 const char *prefix
= targetm
.asm_out
.mergeable_rodata_prefix
;
752 char *name
= (char *) alloca (strlen (prefix
) + 30);
754 mode
= TYPE_MODE (TREE_TYPE (TREE_TYPE (decl
)));
755 modesize
= GET_MODE_BITSIZE (mode
);
756 if (modesize
>= 8 && modesize
<= 256
757 && (modesize
& (modesize
- 1)) == 0)
759 if (align
< modesize
)
762 str
= TREE_STRING_POINTER (decl
);
763 unit
= GET_MODE_SIZE (mode
);
765 /* Check for embedded NUL characters. */
766 for (i
= 0; i
< len
; i
+= unit
)
768 for (j
= 0; j
< unit
; j
++)
769 if (str
[i
+ j
] != '\0')
776 sprintf (name
, "%s.str%d.%d", prefix
,
777 modesize
/ 8, (int) (align
/ 8));
778 flags
|= (modesize
/ 8) | SECTION_MERGE
| SECTION_STRINGS
;
779 return get_section (name
, flags
, NULL
);
784 return readonly_data_section
;
787 /* Return the section to use for constant merging. */
790 mergeable_constant_section (enum machine_mode mode ATTRIBUTE_UNUSED
,
791 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
,
792 unsigned int flags ATTRIBUTE_UNUSED
)
794 unsigned int modesize
= GET_MODE_BITSIZE (mode
);
796 if (HAVE_GAS_SHF_MERGE
&& flag_merge_constants
802 && (align
& (align
- 1)) == 0)
804 const char *prefix
= targetm
.asm_out
.mergeable_rodata_prefix
;
805 char *name
= (char *) alloca (strlen (prefix
) + 30);
807 sprintf (name
, "%s.cst%d", prefix
, (int) (align
/ 8));
808 flags
|= (align
/ 8) | SECTION_MERGE
;
809 return get_section (name
, flags
, NULL
);
811 return readonly_data_section
;
814 /* Given NAME, a putative register name, discard any customary prefixes. */
817 strip_reg_name (const char *name
)
819 #ifdef REGISTER_PREFIX
820 if (!strncmp (name
, REGISTER_PREFIX
, strlen (REGISTER_PREFIX
)))
821 name
+= strlen (REGISTER_PREFIX
);
823 if (name
[0] == '%' || name
[0] == '#')
828 /* The user has asked for a DECL to have a particular name. Set (or
829 change) it in such a way that we don't prefix an underscore to
832 set_user_assembler_name (tree decl
, const char *name
)
834 char *starred
= (char *) alloca (strlen (name
) + 2);
836 strcpy (starred
+ 1, name
);
837 change_decl_assembler_name (decl
, get_identifier (starred
));
838 SET_DECL_RTL (decl
, NULL_RTX
);
841 /* Decode an `asm' spec for a declaration as a register name.
842 Return the register number, or -1 if nothing specified,
843 or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
844 or -3 if ASMSPEC is `cc' and is not recognized,
845 or -4 if ASMSPEC is `memory' and is not recognized.
846 Accept an exact spelling or a decimal number.
847 Prefixes such as % are optional. */
850 decode_reg_name_and_count (const char *asmspec
, int *pnregs
)
852 /* Presume just one register is clobbered. */
859 /* Get rid of confusing prefixes. */
860 asmspec
= strip_reg_name (asmspec
);
862 /* Allow a decimal number as a "register name". */
863 for (i
= strlen (asmspec
) - 1; i
>= 0; i
--)
864 if (! ISDIGIT (asmspec
[i
]))
866 if (asmspec
[0] != 0 && i
< 0)
869 if (i
< FIRST_PSEUDO_REGISTER
&& i
>= 0)
875 for (i
= 0; i
< FIRST_PSEUDO_REGISTER
; i
++)
877 && ! strcmp (asmspec
, strip_reg_name (reg_names
[i
])))
880 #ifdef OVERLAPPING_REGISTER_NAMES
884 const char *const name
;
887 } table
[] = OVERLAPPING_REGISTER_NAMES
;
889 for (i
= 0; i
< (int) ARRAY_SIZE (table
); i
++)
891 && ! strcmp (asmspec
, table
[i
].name
))
893 *pnregs
= table
[i
].nregs
;
894 return table
[i
].number
;
897 #endif /* OVERLAPPING_REGISTER_NAMES */
899 #ifdef ADDITIONAL_REGISTER_NAMES
901 static const struct { const char *const name
; const int number
; } table
[]
902 = ADDITIONAL_REGISTER_NAMES
;
904 for (i
= 0; i
< (int) ARRAY_SIZE (table
); i
++)
906 && ! strcmp (asmspec
, table
[i
].name
))
907 return table
[i
].number
;
909 #endif /* ADDITIONAL_REGISTER_NAMES */
911 if (!strcmp (asmspec
, "memory"))
914 if (!strcmp (asmspec
, "cc"))
924 decode_reg_name (const char *name
)
927 return decode_reg_name_and_count (name
, &count
);
931 /* Return true if DECL's initializer is suitable for a BSS section. */
934 bss_initializer_p (const_tree decl
)
936 return (DECL_INITIAL (decl
) == NULL
937 || DECL_INITIAL (decl
) == error_mark_node
938 || (flag_zero_initialized_in_bss
939 /* Leave constant zeroes in .rodata so they
941 && !TREE_READONLY (decl
)
942 && initializer_zerop (DECL_INITIAL (decl
))));
945 /* Compute the alignment of variable specified by DECL.
946 DONT_OUTPUT_DATA is from assemble_variable. */
949 align_variable (tree decl
, bool dont_output_data
)
951 unsigned int align
= DECL_ALIGN (decl
);
953 /* In the case for initialing an array whose length isn't specified,
954 where we have not yet been able to do the layout,
955 figure out the proper alignment now. */
956 if (dont_output_data
&& DECL_SIZE (decl
) == 0
957 && TREE_CODE (TREE_TYPE (decl
)) == ARRAY_TYPE
)
958 align
= MAX (align
, TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl
))));
960 /* Some object file formats have a maximum alignment which they support.
961 In particular, a.out format supports a maximum alignment of 4. */
962 if (align
> MAX_OFILE_ALIGNMENT
)
964 warning (0, "alignment of %q+D is greater than maximum object "
965 "file alignment. Using %d", decl
,
966 MAX_OFILE_ALIGNMENT
/BITS_PER_UNIT
);
967 align
= MAX_OFILE_ALIGNMENT
;
970 if (! DECL_USER_ALIGN (decl
))
972 #ifdef DATA_ABI_ALIGNMENT
973 unsigned int data_abi_align
974 = DATA_ABI_ALIGNMENT (TREE_TYPE (decl
), align
);
975 /* For backwards compatibility, don't assume the ABI alignment for
977 if (! DECL_THREAD_LOCAL_P (decl
) || data_abi_align
<= BITS_PER_WORD
)
978 align
= data_abi_align
;
981 /* On some machines, it is good to increase alignment sometimes.
982 But as DECL_ALIGN is used both for actually emitting the variable
983 and for code accessing the variable as guaranteed alignment, we
984 can only increase the alignment if it is a performance optimization
985 if the references to it must bind to the current definition. */
986 if (decl_binds_to_current_def_p (decl
))
988 #ifdef DATA_ALIGNMENT
989 unsigned int data_align
= DATA_ALIGNMENT (TREE_TYPE (decl
), align
);
990 /* Don't increase alignment too much for TLS variables - TLS space
992 if (! DECL_THREAD_LOCAL_P (decl
) || data_align
<= BITS_PER_WORD
)
995 #ifdef CONSTANT_ALIGNMENT
996 if (DECL_INITIAL (decl
) != 0
997 && DECL_INITIAL (decl
) != error_mark_node
)
999 unsigned int const_align
1000 = CONSTANT_ALIGNMENT (DECL_INITIAL (decl
), align
);
1001 /* Don't increase alignment too much for TLS variables - TLS
1002 space is too precious. */
1003 if (! DECL_THREAD_LOCAL_P (decl
) || const_align
<= BITS_PER_WORD
)
1004 align
= const_align
;
1010 /* Reset the alignment in case we have made it tighter, so we can benefit
1011 from it in get_pointer_alignment. */
1012 DECL_ALIGN (decl
) = align
;
1015 /* Return DECL_ALIGN (decl), possibly increased for optimization purposes
1016 beyond what align_variable returned. */
1019 get_variable_align (tree decl
)
1021 unsigned int align
= DECL_ALIGN (decl
);
1023 /* For user aligned vars or static vars align_variable already did
1025 if (DECL_USER_ALIGN (decl
) || !TREE_PUBLIC (decl
))
1028 #ifdef DATA_ABI_ALIGNMENT
1029 if (DECL_THREAD_LOCAL_P (decl
))
1030 align
= DATA_ABI_ALIGNMENT (TREE_TYPE (decl
), align
);
1033 /* For decls that bind to the current definition, align_variable
1034 did also everything, except for not assuming ABI required alignment
1035 of TLS variables. For other vars, increase the alignment here
1036 as an optimization. */
1037 if (!decl_binds_to_current_def_p (decl
))
1039 /* On some machines, it is good to increase alignment sometimes. */
1040 #ifdef DATA_ALIGNMENT
1041 unsigned int data_align
= DATA_ALIGNMENT (TREE_TYPE (decl
), align
);
1042 /* Don't increase alignment too much for TLS variables - TLS space
1044 if (! DECL_THREAD_LOCAL_P (decl
) || data_align
<= BITS_PER_WORD
)
1047 #ifdef CONSTANT_ALIGNMENT
1048 if (DECL_INITIAL (decl
) != 0 && DECL_INITIAL (decl
) != error_mark_node
)
1050 unsigned int const_align
= CONSTANT_ALIGNMENT (DECL_INITIAL (decl
),
1052 /* Don't increase alignment too much for TLS variables - TLS space
1054 if (! DECL_THREAD_LOCAL_P (decl
) || const_align
<= BITS_PER_WORD
)
1055 align
= const_align
;
1063 /* Return the section into which the given VAR_DECL or CONST_DECL
1064 should be placed. PREFER_NOSWITCH_P is true if a noswitch
1065 section should be used wherever possible. */
1068 get_variable_section (tree decl
, bool prefer_noswitch_p
)
1070 addr_space_t as
= ADDR_SPACE_GENERIC
;
1073 if (TREE_TYPE (decl
) != error_mark_node
)
1074 as
= TYPE_ADDR_SPACE (TREE_TYPE (decl
));
1076 if (DECL_COMMON (decl
))
1078 /* If the decl has been given an explicit section name, or it resides
1079 in a non-generic address space, then it isn't common, and shouldn't
1080 be handled as such. */
1081 gcc_assert (DECL_SECTION_NAME (decl
) == NULL
1082 && ADDR_SPACE_GENERIC_P (as
));
1083 if (DECL_THREAD_LOCAL_P (decl
))
1084 return tls_comm_section
;
1085 else if (TREE_PUBLIC (decl
) && bss_initializer_p (decl
))
1086 return comm_section
;
1089 if (DECL_INITIAL (decl
) == error_mark_node
)
1090 reloc
= contains_pointers_p (TREE_TYPE (decl
)) ? 3 : 0;
1091 else if (DECL_INITIAL (decl
))
1092 reloc
= compute_reloc_for_constant (DECL_INITIAL (decl
));
1096 resolve_unique_section (decl
, reloc
, flag_data_sections
);
1097 if (IN_NAMED_SECTION (decl
))
1098 return get_named_section (decl
, NULL
, reloc
);
1100 if (ADDR_SPACE_GENERIC_P (as
)
1101 && !DECL_THREAD_LOCAL_P (decl
)
1102 && !(prefer_noswitch_p
&& targetm
.have_switchable_bss_sections
)
1103 && bss_initializer_p (decl
))
1105 if (!TREE_PUBLIC (decl
)
1106 && !((flag_sanitize
& SANITIZE_ADDRESS
)
1107 && asan_protect_global (decl
)))
1108 return lcomm_section
;
1109 if (bss_noswitch_section
)
1110 return bss_noswitch_section
;
1113 return targetm
.asm_out
.select_section (decl
, reloc
,
1114 get_variable_align (decl
));
1117 /* Return the block into which object_block DECL should be placed. */
1119 static struct object_block
*
1120 get_block_for_decl (tree decl
)
1124 if (TREE_CODE (decl
) == VAR_DECL
)
1126 /* The object must be defined in this translation unit. */
1127 if (DECL_EXTERNAL (decl
))
1130 /* There's no point using object blocks for something that is
1131 isolated by definition. */
1132 if (DECL_ONE_ONLY (decl
))
1136 /* We can only calculate block offsets if the decl has a known
1138 if (DECL_SIZE_UNIT (decl
) == NULL
)
1140 if (!host_integerp (DECL_SIZE_UNIT (decl
), 1))
1143 /* Find out which section should contain DECL. We cannot put it into
1144 an object block if it requires a standalone definition. */
1145 if (TREE_CODE (decl
) == VAR_DECL
)
1146 align_variable (decl
, 0);
1147 sect
= get_variable_section (decl
, true);
1148 if (SECTION_STYLE (sect
) == SECTION_NOSWITCH
)
1151 return get_block_for_section (sect
);
1154 /* Make sure block symbol SYMBOL is in block BLOCK. */
1157 change_symbol_block (rtx symbol
, struct object_block
*block
)
1159 if (block
!= SYMBOL_REF_BLOCK (symbol
))
1161 gcc_assert (SYMBOL_REF_BLOCK_OFFSET (symbol
) < 0);
1162 SYMBOL_REF_BLOCK (symbol
) = block
;
1166 /* Return true if it is possible to put DECL in an object_block. */
1169 use_blocks_for_decl_p (tree decl
)
1171 /* Only data DECLs can be placed into object blocks. */
1172 if (TREE_CODE (decl
) != VAR_DECL
&& TREE_CODE (decl
) != CONST_DECL
)
1175 /* Detect decls created by dw2_force_const_mem. Such decls are
1176 special because DECL_INITIAL doesn't specify the decl's true value.
1177 dw2_output_indirect_constants will instead call assemble_variable
1178 with dont_output_data set to 1 and then print the contents itself. */
1179 if (DECL_INITIAL (decl
) == decl
)
1182 /* If this decl is an alias, then we don't want to emit a
1184 if (lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)))
1187 return targetm
.use_blocks_for_decl_p (decl
);
1190 /* Create the DECL_RTL for a VAR_DECL or FUNCTION_DECL. DECL should
1191 have static storage duration. In other words, it should not be an
1192 automatic variable, including PARM_DECLs.
1194 There is, however, one exception: this function handles variables
1195 explicitly placed in a particular register by the user.
1197 This is never called for PARM_DECL nodes. */
1200 make_decl_rtl (tree decl
)
1202 const char *name
= 0;
1206 /* Check that we are not being given an automatic variable. */
1207 gcc_assert (TREE_CODE (decl
) != PARM_DECL
1208 && TREE_CODE (decl
) != RESULT_DECL
);
1210 /* A weak alias has TREE_PUBLIC set but not the other bits. */
1211 gcc_assert (TREE_CODE (decl
) != VAR_DECL
1212 || TREE_STATIC (decl
)
1213 || TREE_PUBLIC (decl
)
1214 || DECL_EXTERNAL (decl
)
1215 || DECL_REGISTER (decl
));
1217 /* And that we were not given a type or a label. */
1218 gcc_assert (TREE_CODE (decl
) != TYPE_DECL
1219 && TREE_CODE (decl
) != LABEL_DECL
);
1221 /* For a duplicate declaration, we can be called twice on the
1222 same DECL node. Don't discard the RTL already made. */
1223 if (DECL_RTL_SET_P (decl
))
1225 /* If the old RTL had the wrong mode, fix the mode. */
1226 x
= DECL_RTL (decl
);
1227 if (GET_MODE (x
) != DECL_MODE (decl
))
1228 SET_DECL_RTL (decl
, adjust_address_nv (x
, DECL_MODE (decl
), 0));
1230 if (TREE_CODE (decl
) != FUNCTION_DECL
&& DECL_REGISTER (decl
))
1233 /* ??? Another way to do this would be to maintain a hashed
1234 table of such critters. Instead of adding stuff to a DECL
1235 to give certain attributes to it, we could use an external
1236 hash map from DECL to set of attributes. */
1238 /* Let the target reassign the RTL if it wants.
1239 This is necessary, for example, when one machine specific
1240 decl attribute overrides another. */
1241 targetm
.encode_section_info (decl
, DECL_RTL (decl
), false);
1243 /* If the symbol has a SYMBOL_REF_BLOCK field, update it based
1244 on the new decl information. */
1246 && GET_CODE (XEXP (x
, 0)) == SYMBOL_REF
1247 && SYMBOL_REF_HAS_BLOCK_INFO_P (XEXP (x
, 0)))
1248 change_symbol_block (XEXP (x
, 0), get_block_for_decl (decl
));
1250 /* Make this function static known to the mudflap runtime. */
1251 if (flag_mudflap
&& TREE_CODE (decl
) == VAR_DECL
)
1252 mudflap_enqueue_decl (decl
);
1257 /* If this variable belongs to the global constant pool, retrieve the
1258 pre-computed RTL or recompute it in LTO mode. */
1259 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_IN_CONSTANT_POOL (decl
))
1261 SET_DECL_RTL (decl
, output_constant_def (DECL_INITIAL (decl
), 1));
1265 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
1267 if (name
[0] != '*' && TREE_CODE (decl
) != FUNCTION_DECL
1268 && DECL_REGISTER (decl
))
1270 error ("register name not specified for %q+D", decl
);
1272 else if (TREE_CODE (decl
) != FUNCTION_DECL
&& DECL_REGISTER (decl
))
1274 const char *asmspec
= name
+1;
1275 enum machine_mode mode
= DECL_MODE (decl
);
1276 reg_number
= decode_reg_name (asmspec
);
1277 /* First detect errors in declaring global registers. */
1278 if (reg_number
== -1)
1279 error ("register name not specified for %q+D", decl
);
1280 else if (reg_number
< 0)
1281 error ("invalid register name for %q+D", decl
);
1282 else if (mode
== BLKmode
)
1283 error ("data type of %q+D isn%'t suitable for a register",
1285 else if (!in_hard_reg_set_p (accessible_reg_set
, mode
, reg_number
))
1286 error ("the register specified for %q+D cannot be accessed"
1287 " by the current target", decl
);
1288 else if (!in_hard_reg_set_p (operand_reg_set
, mode
, reg_number
))
1289 error ("the register specified for %q+D is not general enough"
1290 " to be used as a register variable", decl
);
1291 else if (!HARD_REGNO_MODE_OK (reg_number
, mode
))
1292 error ("register specified for %q+D isn%'t suitable for data type",
1294 /* Now handle properly declared static register variables. */
1299 if (DECL_INITIAL (decl
) != 0 && TREE_STATIC (decl
))
1301 DECL_INITIAL (decl
) = 0;
1302 error ("global register variable has initial value");
1304 if (TREE_THIS_VOLATILE (decl
))
1305 warning (OPT_Wvolatile_register_var
,
1306 "optimization may eliminate reads and/or "
1307 "writes to register variables");
1309 /* If the user specified one of the eliminables registers here,
1310 e.g., FRAME_POINTER_REGNUM, we don't want to get this variable
1311 confused with that register and be eliminated. This usage is
1312 somewhat suspect... */
1314 SET_DECL_RTL (decl
, gen_rtx_raw_REG (mode
, reg_number
));
1315 ORIGINAL_REGNO (DECL_RTL (decl
)) = reg_number
;
1316 REG_USERVAR_P (DECL_RTL (decl
)) = 1;
1318 if (TREE_STATIC (decl
))
1320 /* Make this register global, so not usable for anything
1322 #ifdef ASM_DECLARE_REGISTER_GLOBAL
1323 name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
1324 ASM_DECLARE_REGISTER_GLOBAL (asm_out_file
, decl
, reg_number
, name
);
1326 nregs
= hard_regno_nregs
[reg_number
][mode
];
1328 globalize_reg (decl
, reg_number
+ --nregs
);
1331 /* As a register variable, it has no section. */
1335 /* Now handle ordinary static variables and functions (in memory).
1336 Also handle vars declared register invalidly. */
1337 else if (name
[0] == '*')
1339 #ifdef REGISTER_PREFIX
1340 if (strlen (REGISTER_PREFIX
) != 0)
1342 reg_number
= decode_reg_name (name
);
1343 if (reg_number
>= 0 || reg_number
== -3)
1344 error ("register name given for non-register variable %q+D", decl
);
1349 /* Specifying a section attribute on a variable forces it into a
1350 non-.bss section, and thus it cannot be common. */
1351 /* FIXME: In general this code should not be necessary because
1352 visibility pass is doing the same work. But notice_global_symbol
1353 is called early and it needs to make DECL_RTL to get the name.
1354 we take care of recomputing the DECL_RTL after visibility is changed. */
1355 if (TREE_CODE (decl
) == VAR_DECL
1356 && DECL_SECTION_NAME (decl
) != NULL_TREE
1357 && DECL_INITIAL (decl
) == NULL_TREE
1358 && DECL_COMMON (decl
))
1359 DECL_COMMON (decl
) = 0;
1361 /* Variables can't be both common and weak. */
1362 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_WEAK (decl
))
1363 DECL_COMMON (decl
) = 0;
1365 if (use_object_blocks_p () && use_blocks_for_decl_p (decl
))
1366 x
= create_block_symbol (name
, get_block_for_decl (decl
), -1);
1369 enum machine_mode address_mode
= Pmode
;
1370 if (TREE_TYPE (decl
) != error_mark_node
)
1372 addr_space_t as
= TYPE_ADDR_SPACE (TREE_TYPE (decl
));
1373 address_mode
= targetm
.addr_space
.address_mode (as
);
1375 x
= gen_rtx_SYMBOL_REF (address_mode
, name
);
1377 SYMBOL_REF_WEAK (x
) = DECL_WEAK (decl
);
1378 SET_SYMBOL_REF_DECL (x
, decl
);
1380 x
= gen_rtx_MEM (DECL_MODE (decl
), x
);
1381 if (TREE_CODE (decl
) != FUNCTION_DECL
)
1382 set_mem_attributes (x
, decl
, 1);
1383 SET_DECL_RTL (decl
, x
);
1385 /* Optionally set flags or add text to the name to record information
1386 such as that it is a function name.
1387 If the name is changed, the macro ASM_OUTPUT_LABELREF
1388 will have to know how to strip this information. */
1389 targetm
.encode_section_info (decl
, DECL_RTL (decl
), true);
1391 /* Make this function static known to the mudflap runtime. */
1392 if (flag_mudflap
&& TREE_CODE (decl
) == VAR_DECL
)
1393 mudflap_enqueue_decl (decl
);
1396 /* Like make_decl_rtl, but inhibit creation of new alias sets when
1397 calling make_decl_rtl. Also, reset DECL_RTL before returning the
1401 make_decl_rtl_for_debug (tree decl
)
1403 unsigned int save_aliasing_flag
, save_mudflap_flag
;
1406 if (DECL_RTL_SET_P (decl
))
1407 return DECL_RTL (decl
);
1409 /* Kludge alert! Somewhere down the call chain, make_decl_rtl will
1410 call new_alias_set. If running with -fcompare-debug, sometimes
1411 we do not want to create alias sets that will throw the alias
1412 numbers off in the comparison dumps. So... clearing
1413 flag_strict_aliasing will keep new_alias_set() from creating a
1414 new set. It is undesirable to register decl with mudflap
1415 in this case as well. */
1416 save_aliasing_flag
= flag_strict_aliasing
;
1417 flag_strict_aliasing
= 0;
1418 save_mudflap_flag
= flag_mudflap
;
1421 rtl
= DECL_RTL (decl
);
1422 /* Reset DECL_RTL back, as various parts of the compiler expects
1423 DECL_RTL set meaning it is actually going to be output. */
1424 SET_DECL_RTL (decl
, NULL
);
1426 flag_strict_aliasing
= save_aliasing_flag
;
1427 flag_mudflap
= save_mudflap_flag
;
1432 /* Output a string of literal assembler code
1433 for an `asm' keyword used between functions. */
1436 assemble_asm (tree string
)
1441 if (TREE_CODE (string
) == ADDR_EXPR
)
1442 string
= TREE_OPERAND (string
, 0);
1444 p
= TREE_STRING_POINTER (string
);
1445 fprintf (asm_out_file
, "%s%s\n", p
[0] == '\t' ? "" : "\t", p
);
1448 /* Write the address of the entity given by SYMBOL to SEC. */
1450 assemble_addr_to_section (rtx symbol
, section
*sec
)
1452 switch_to_section (sec
);
1453 assemble_align (POINTER_SIZE
);
1454 assemble_integer (symbol
, POINTER_SIZE
/ BITS_PER_UNIT
, POINTER_SIZE
, 1);
1457 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
1458 not) section for PRIORITY. */
1460 get_cdtor_priority_section (int priority
, bool constructor_p
)
1464 /* ??? This only works reliably with the GNU linker. */
1465 sprintf (buf
, "%s.%.5u",
1466 constructor_p
? ".ctors" : ".dtors",
1467 /* Invert the numbering so the linker puts us in the proper
1468 order; constructors are run from right to left, and the
1469 linker sorts in increasing order. */
1470 MAX_INIT_PRIORITY
- priority
);
1471 return get_section (buf
, SECTION_WRITE
, NULL
);
1475 default_named_section_asm_out_destructor (rtx symbol
, int priority
)
1479 if (priority
!= DEFAULT_INIT_PRIORITY
)
1480 sec
= get_cdtor_priority_section (priority
,
1481 /*constructor_p=*/false);
1483 sec
= get_section (".dtors", SECTION_WRITE
, NULL
);
1485 assemble_addr_to_section (symbol
, sec
);
1488 #ifdef DTORS_SECTION_ASM_OP
1490 default_dtor_section_asm_out_destructor (rtx symbol
,
1491 int priority ATTRIBUTE_UNUSED
)
1493 assemble_addr_to_section (symbol
, dtors_section
);
1498 default_named_section_asm_out_constructor (rtx symbol
, int priority
)
1502 if (priority
!= DEFAULT_INIT_PRIORITY
)
1503 sec
= get_cdtor_priority_section (priority
,
1504 /*constructor_p=*/true);
1506 sec
= get_section (".ctors", SECTION_WRITE
, NULL
);
1508 assemble_addr_to_section (symbol
, sec
);
1511 #ifdef CTORS_SECTION_ASM_OP
1513 default_ctor_section_asm_out_constructor (rtx symbol
,
1514 int priority ATTRIBUTE_UNUSED
)
1516 assemble_addr_to_section (symbol
, ctors_section
);
1520 /* CONSTANT_POOL_BEFORE_FUNCTION may be defined as an expression with
1521 a nonzero value if the constant pool should be output before the
1522 start of the function, or a zero value if the pool should output
1523 after the end of the function. The default is to put it before the
1526 #ifndef CONSTANT_POOL_BEFORE_FUNCTION
1527 #define CONSTANT_POOL_BEFORE_FUNCTION 1
1530 /* DECL is an object (either VAR_DECL or FUNCTION_DECL) which is going
1531 to be output to assembler.
1532 Set first_global_object_name and weak_global_object_name as appropriate. */
1535 notice_global_symbol (tree decl
)
1537 const char **type
= &first_global_object_name
;
1539 if (first_global_object_name
1540 || !TREE_PUBLIC (decl
)
1541 || DECL_EXTERNAL (decl
)
1542 || !DECL_NAME (decl
)
1543 || (TREE_CODE (decl
) != FUNCTION_DECL
1544 && (TREE_CODE (decl
) != VAR_DECL
1545 || (DECL_COMMON (decl
)
1546 && (DECL_INITIAL (decl
) == 0
1547 || DECL_INITIAL (decl
) == error_mark_node
))))
1548 || !MEM_P (DECL_RTL (decl
)))
1551 /* We win when global object is found, but it is useful to know about weak
1552 symbol as well so we can produce nicer unique names. */
1553 if (DECL_WEAK (decl
) || DECL_ONE_ONLY (decl
) || flag_shlib
)
1554 type
= &weak_global_object_name
;
1560 rtx decl_rtl
= DECL_RTL (decl
);
1562 p
= targetm
.strip_name_encoding (XSTR (XEXP (decl_rtl
, 0), 0));
1563 name
= ggc_strdup (p
);
1569 /* If not using flag_reorder_blocks_and_partition, decide early whether the
1570 current function goes into the cold section, so that targets can use
1571 current_function_section during RTL expansion. DECL describes the
1575 decide_function_section (tree decl
)
1577 first_function_block_is_cold
= false;
1579 if (flag_reorder_blocks_and_partition
)
1580 /* We will decide in assemble_start_function. */
1583 if (DECL_SECTION_NAME (decl
))
1585 struct cgraph_node
*node
= cgraph_get_node (current_function_decl
);
1586 /* Calls to function_section rely on first_function_block_is_cold
1588 first_function_block_is_cold
= (node
1590 == NODE_FREQUENCY_UNLIKELY_EXECUTED
);
1593 in_cold_section_p
= first_function_block_is_cold
;
1596 /* Output assembler code for the constant pool of a function and associated
1597 with defining the name of the function. DECL describes the function.
1598 NAME is the function's name. For the constant pool, we use the current
1599 constant pool data. */
1602 assemble_start_function (tree decl
, const char *fnname
)
1605 char tmp_label
[100];
1606 bool hot_label_written
= false;
1608 if (flag_reorder_blocks_and_partition
)
1610 ASM_GENERATE_INTERNAL_LABEL (tmp_label
, "LHOTB", const_labelno
);
1611 crtl
->subsections
.hot_section_label
= ggc_strdup (tmp_label
);
1612 ASM_GENERATE_INTERNAL_LABEL (tmp_label
, "LCOLDB", const_labelno
);
1613 crtl
->subsections
.cold_section_label
= ggc_strdup (tmp_label
);
1614 ASM_GENERATE_INTERNAL_LABEL (tmp_label
, "LHOTE", const_labelno
);
1615 crtl
->subsections
.hot_section_end_label
= ggc_strdup (tmp_label
);
1616 ASM_GENERATE_INTERNAL_LABEL (tmp_label
, "LCOLDE", const_labelno
);
1617 crtl
->subsections
.cold_section_end_label
= ggc_strdup (tmp_label
);
1622 crtl
->subsections
.hot_section_label
= NULL
;
1623 crtl
->subsections
.cold_section_label
= NULL
;
1624 crtl
->subsections
.hot_section_end_label
= NULL
;
1625 crtl
->subsections
.cold_section_end_label
= NULL
;
1628 /* The following code does not need preprocessing in the assembler. */
1632 if (CONSTANT_POOL_BEFORE_FUNCTION
)
1633 output_constant_pool (fnname
, decl
);
1635 /* Make sure the not and cold text (code) sections are properly
1636 aligned. This is necessary here in the case where the function
1637 has both hot and cold sections, because we don't want to re-set
1638 the alignment when the section switch happens mid-function. */
1640 if (flag_reorder_blocks_and_partition
)
1642 first_function_block_is_cold
= false;
1644 switch_to_section (unlikely_text_section ());
1645 assemble_align (DECL_ALIGN (decl
));
1646 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.cold_section_label
);
1648 /* When the function starts with a cold section, we need to explicitly
1649 align the hot section and write out the hot section label.
1650 But if the current function is a thunk, we do not have a CFG. */
1652 && BB_PARTITION (ENTRY_BLOCK_PTR
->next_bb
) == BB_COLD_PARTITION
)
1654 switch_to_section (text_section
);
1655 assemble_align (DECL_ALIGN (decl
));
1656 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.hot_section_label
);
1657 hot_label_written
= true;
1658 first_function_block_is_cold
= true;
1660 in_cold_section_p
= first_function_block_is_cold
;
1664 /* Switch to the correct text section for the start of the function. */
1666 switch_to_section (function_section (decl
));
1667 if (flag_reorder_blocks_and_partition
1668 && !hot_label_written
)
1669 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.hot_section_label
);
1671 /* Tell assembler to move to target machine's alignment for functions. */
1672 align
= floor_log2 (DECL_ALIGN (decl
) / BITS_PER_UNIT
);
1675 ASM_OUTPUT_ALIGN (asm_out_file
, align
);
1678 /* Handle a user-specified function alignment.
1679 Note that we still need to align to DECL_ALIGN, as above,
1680 because ASM_OUTPUT_MAX_SKIP_ALIGN might not do any alignment at all. */
1681 if (! DECL_USER_ALIGN (decl
)
1682 && align_functions_log
> align
1683 && optimize_function_for_speed_p (cfun
))
1685 #ifdef ASM_OUTPUT_MAX_SKIP_ALIGN
1686 ASM_OUTPUT_MAX_SKIP_ALIGN (asm_out_file
,
1687 align_functions_log
, align_functions
- 1);
1689 ASM_OUTPUT_ALIGN (asm_out_file
, align_functions_log
);
1693 #ifdef ASM_OUTPUT_FUNCTION_PREFIX
1694 ASM_OUTPUT_FUNCTION_PREFIX (asm_out_file
, fnname
);
1697 if (!DECL_IGNORED_P (decl
))
1698 (*debug_hooks
->begin_function
) (decl
);
1700 /* Make function name accessible from other files, if appropriate. */
1702 if (TREE_PUBLIC (decl
))
1704 notice_global_symbol (decl
);
1706 globalize_decl (decl
);
1708 maybe_assemble_visibility (decl
);
1711 if (DECL_PRESERVE_P (decl
))
1712 targetm
.asm_out
.mark_decl_preserved (fnname
);
1714 /* Do any machine/system dependent processing of the function name. */
1715 #ifdef ASM_DECLARE_FUNCTION_NAME
1716 ASM_DECLARE_FUNCTION_NAME (asm_out_file
, fnname
, current_function_decl
);
1718 /* Standard thing is just output label for the function. */
1719 ASM_OUTPUT_FUNCTION_LABEL (asm_out_file
, fnname
, current_function_decl
);
1720 #endif /* ASM_DECLARE_FUNCTION_NAME */
1722 if (lookup_attribute ("no_split_stack", DECL_ATTRIBUTES (decl
)))
1723 saw_no_split_stack
= true;
1726 /* Output assembler code associated with defining the size of the
1727 function. DECL describes the function. NAME is the function's name. */
1730 assemble_end_function (tree decl
, const char *fnname ATTRIBUTE_UNUSED
)
1732 #ifdef ASM_DECLARE_FUNCTION_SIZE
1733 /* We could have switched section in the middle of the function. */
1734 if (flag_reorder_blocks_and_partition
)
1735 switch_to_section (function_section (decl
));
1736 ASM_DECLARE_FUNCTION_SIZE (asm_out_file
, fnname
, decl
);
1738 if (! CONSTANT_POOL_BEFORE_FUNCTION
)
1740 output_constant_pool (fnname
, decl
);
1741 switch_to_section (function_section (decl
)); /* need to switch back */
1743 /* Output labels for end of hot/cold text sections (to be used by
1745 if (flag_reorder_blocks_and_partition
)
1747 section
*save_text_section
;
1749 save_text_section
= in_section
;
1750 switch_to_section (unlikely_text_section ());
1751 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.cold_section_end_label
);
1752 if (first_function_block_is_cold
)
1753 switch_to_section (text_section
);
1755 switch_to_section (function_section (decl
));
1756 ASM_OUTPUT_LABEL (asm_out_file
, crtl
->subsections
.hot_section_end_label
);
1757 switch_to_section (save_text_section
);
1761 /* Assemble code to leave SIZE bytes of zeros. */
1764 assemble_zeros (unsigned HOST_WIDE_INT size
)
1766 /* Do no output if -fsyntax-only. */
1767 if (flag_syntax_only
)
1770 #ifdef ASM_NO_SKIP_IN_TEXT
1771 /* The `space' pseudo in the text section outputs nop insns rather than 0s,
1772 so we must output 0s explicitly in the text section. */
1773 if (ASM_NO_SKIP_IN_TEXT
&& (in_section
->common
.flags
& SECTION_CODE
) != 0)
1775 unsigned HOST_WIDE_INT i
;
1776 for (i
= 0; i
< size
; i
++)
1777 assemble_integer (const0_rtx
, 1, BITS_PER_UNIT
, 1);
1782 ASM_OUTPUT_SKIP (asm_out_file
, size
);
1785 /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
1788 assemble_align (int align
)
1790 if (align
> BITS_PER_UNIT
)
1792 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (align
/ BITS_PER_UNIT
));
1796 /* Assemble a string constant with the specified C string as contents. */
1799 assemble_string (const char *p
, int size
)
1804 /* If the string is very long, split it up. */
1808 int thissize
= size
- pos
;
1809 if (thissize
> maximum
)
1812 ASM_OUTPUT_ASCII (asm_out_file
, p
, thissize
);
1820 /* A noswitch_section_callback for lcomm_section. */
1823 emit_local (tree decl ATTRIBUTE_UNUSED
,
1824 const char *name ATTRIBUTE_UNUSED
,
1825 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED
,
1826 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
)
1828 #if defined ASM_OUTPUT_ALIGNED_DECL_LOCAL
1829 ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file
, decl
, name
,
1830 size
, DECL_ALIGN (decl
));
1832 #elif defined ASM_OUTPUT_ALIGNED_LOCAL
1833 ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file
, name
, size
, DECL_ALIGN (decl
));
1836 ASM_OUTPUT_LOCAL (asm_out_file
, name
, size
, rounded
);
1841 /* A noswitch_section_callback for bss_noswitch_section. */
1843 #if defined ASM_OUTPUT_ALIGNED_BSS
1845 emit_bss (tree decl ATTRIBUTE_UNUSED
,
1846 const char *name ATTRIBUTE_UNUSED
,
1847 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED
,
1848 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
)
1850 #if defined ASM_OUTPUT_ALIGNED_BSS
1851 ASM_OUTPUT_ALIGNED_BSS (asm_out_file
, decl
, name
, size
,
1852 get_variable_align (decl
));
1858 /* A noswitch_section_callback for comm_section. */
1861 emit_common (tree decl ATTRIBUTE_UNUSED
,
1862 const char *name ATTRIBUTE_UNUSED
,
1863 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED
,
1864 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
)
1866 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
1867 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, decl
, name
,
1868 size
, get_variable_align (decl
));
1870 #elif defined ASM_OUTPUT_ALIGNED_COMMON
1871 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, name
, size
,
1872 get_variable_align (decl
));
1875 ASM_OUTPUT_COMMON (asm_out_file
, name
, size
, rounded
);
1880 /* A noswitch_section_callback for tls_comm_section. */
1883 emit_tls_common (tree decl ATTRIBUTE_UNUSED
,
1884 const char *name ATTRIBUTE_UNUSED
,
1885 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED
,
1886 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
)
1888 #ifdef ASM_OUTPUT_TLS_COMMON
1889 ASM_OUTPUT_TLS_COMMON (asm_out_file
, decl
, name
, size
);
1892 sorry ("thread-local COMMON data not implemented");
1897 /* Assemble DECL given that it belongs in SECTION_NOSWITCH section SECT.
1898 NAME is the name of DECL's SYMBOL_REF. */
1901 assemble_noswitch_variable (tree decl
, const char *name
, section
*sect
,
1904 unsigned HOST_WIDE_INT size
, rounded
;
1906 size
= tree_low_cst (DECL_SIZE_UNIT (decl
), 1);
1909 if ((flag_sanitize
& SANITIZE_ADDRESS
) && asan_protect_global (decl
))
1910 size
+= asan_red_zone_size (size
);
1912 /* Don't allocate zero bytes of common,
1913 since that means "undefined external" in the linker. */
1917 /* Round size up to multiple of BIGGEST_ALIGNMENT bits
1918 so that each uninitialized object starts on such a boundary. */
1919 rounded
+= (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
) - 1;
1920 rounded
= (rounded
/ (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
)
1921 * (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
));
1923 if (!sect
->noswitch
.callback (decl
, name
, size
, rounded
)
1924 && (unsigned HOST_WIDE_INT
) (align
/ BITS_PER_UNIT
) > rounded
)
1925 warning (0, "requested alignment for %q+D is greater than "
1926 "implemented alignment of %wu", decl
, rounded
);
1929 /* A subroutine of assemble_variable. Output the label and contents of
1930 DECL, whose address is a SYMBOL_REF with name NAME. DONT_OUTPUT_DATA
1931 is as for assemble_variable. */
1934 assemble_variable_contents (tree decl
, const char *name
,
1935 bool dont_output_data
)
1937 /* Do any machine/system dependent processing of the object. */
1938 #ifdef ASM_DECLARE_OBJECT_NAME
1939 last_assemble_variable_decl
= decl
;
1940 ASM_DECLARE_OBJECT_NAME (asm_out_file
, name
, decl
);
1942 /* Standard thing is just output label for the object. */
1943 ASM_OUTPUT_LABEL (asm_out_file
, name
);
1944 #endif /* ASM_DECLARE_OBJECT_NAME */
1946 if (!dont_output_data
)
1948 if (DECL_INITIAL (decl
)
1949 && DECL_INITIAL (decl
) != error_mark_node
1950 && !initializer_zerop (DECL_INITIAL (decl
)))
1951 /* Output the actual data. */
1952 output_constant (DECL_INITIAL (decl
),
1953 tree_low_cst (DECL_SIZE_UNIT (decl
), 1),
1954 get_variable_align (decl
));
1956 /* Leave space for it. */
1957 assemble_zeros (tree_low_cst (DECL_SIZE_UNIT (decl
), 1));
1961 /* Assemble everything that is needed for a variable or function declaration.
1962 Not used for automatic variables, and not used for function definitions.
1963 Should not be called for variables of incomplete structure type.
1965 TOP_LEVEL is nonzero if this variable has file scope.
1966 AT_END is nonzero if this is the special handling, at end of compilation,
1967 to define things that have had only tentative definitions.
1968 DONT_OUTPUT_DATA if nonzero means don't actually output the
1969 initial value (that will be done by the caller). */
1972 assemble_variable (tree decl
, int top_level ATTRIBUTE_UNUSED
,
1973 int at_end ATTRIBUTE_UNUSED
, int dont_output_data
)
1976 rtx decl_rtl
, symbol
;
1979 bool asan_protected
= false;
1981 /* This function is supposed to handle VARIABLES. Ensure we have one. */
1982 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
1984 /* Emulated TLS had better not get this far. */
1985 gcc_checking_assert (targetm
.have_tls
|| !DECL_THREAD_LOCAL_P (decl
));
1987 last_assemble_variable_decl
= 0;
1989 /* Normally no need to say anything here for external references,
1990 since assemble_external is called by the language-specific code
1991 when a declaration is first seen. */
1993 if (DECL_EXTERNAL (decl
))
1996 /* Do nothing for global register variables. */
1997 if (DECL_RTL_SET_P (decl
) && REG_P (DECL_RTL (decl
)))
1999 TREE_ASM_WRITTEN (decl
) = 1;
2003 /* If type was incomplete when the variable was declared,
2004 see if it is complete now. */
2006 if (DECL_SIZE (decl
) == 0)
2007 layout_decl (decl
, 0);
2009 /* Still incomplete => don't allocate it; treat the tentative defn
2010 (which is what it must have been) as an `extern' reference. */
2012 if (!dont_output_data
&& DECL_SIZE (decl
) == 0)
2014 error ("storage size of %q+D isn%'t known", decl
);
2015 TREE_ASM_WRITTEN (decl
) = 1;
2019 /* The first declaration of a variable that comes through this function
2020 decides whether it is global (in C, has external linkage)
2021 or local (in C, has internal linkage). So do nothing more
2022 if this function has already run. */
2024 if (TREE_ASM_WRITTEN (decl
))
2027 /* Make sure targetm.encode_section_info is invoked before we set
2029 decl_rtl
= DECL_RTL (decl
);
2031 TREE_ASM_WRITTEN (decl
) = 1;
2033 /* Do no output if -fsyntax-only. */
2034 if (flag_syntax_only
)
2037 if (! dont_output_data
2038 && ! valid_constant_size_p (DECL_SIZE_UNIT (decl
)))
2040 error ("size of variable %q+D is too large", decl
);
2044 gcc_assert (MEM_P (decl_rtl
));
2045 gcc_assert (GET_CODE (XEXP (decl_rtl
, 0)) == SYMBOL_REF
);
2046 symbol
= XEXP (decl_rtl
, 0);
2048 /* If this symbol belongs to the tree constant pool, output the constant
2049 if it hasn't already been written. */
2050 if (TREE_CONSTANT_POOL_ADDRESS_P (symbol
))
2052 tree decl
= SYMBOL_REF_DECL (symbol
);
2053 if (!TREE_ASM_WRITTEN (DECL_INITIAL (decl
)))
2054 output_constant_def_contents (symbol
);
2060 name
= XSTR (symbol
, 0);
2061 if (TREE_PUBLIC (decl
) && DECL_NAME (decl
))
2062 notice_global_symbol (decl
);
2064 /* Compute the alignment of this data. */
2066 align_variable (decl
, dont_output_data
);
2068 if ((flag_sanitize
& SANITIZE_ADDRESS
)
2069 && asan_protect_global (decl
))
2071 asan_protected
= true;
2072 DECL_ALIGN (decl
) = MAX (DECL_ALIGN (decl
),
2073 ASAN_RED_ZONE_SIZE
* BITS_PER_UNIT
);
2076 set_mem_align (decl_rtl
, DECL_ALIGN (decl
));
2078 align
= get_variable_align (decl
);
2080 if (TREE_PUBLIC (decl
))
2081 maybe_assemble_visibility (decl
);
2083 if (DECL_PRESERVE_P (decl
))
2084 targetm
.asm_out
.mark_decl_preserved (name
);
2086 /* First make the assembler name(s) global if appropriate. */
2087 sect
= get_variable_section (decl
, false);
2088 if (TREE_PUBLIC (decl
)
2089 && (sect
->common
.flags
& SECTION_COMMON
) == 0)
2090 globalize_decl (decl
);
2092 /* Output any data that we will need to use the address of. */
2093 if (DECL_INITIAL (decl
) && DECL_INITIAL (decl
) != error_mark_node
)
2094 output_addressed_constants (DECL_INITIAL (decl
));
2096 /* dbxout.c needs to know this. */
2097 if (sect
&& (sect
->common
.flags
& SECTION_CODE
) != 0)
2098 DECL_IN_TEXT_SECTION (decl
) = 1;
2100 /* If the decl is part of an object_block, make sure that the decl
2101 has been positioned within its block, but do not write out its
2102 definition yet. output_object_blocks will do that later. */
2103 if (SYMBOL_REF_HAS_BLOCK_INFO_P (symbol
) && SYMBOL_REF_BLOCK (symbol
))
2105 gcc_assert (!dont_output_data
);
2106 place_block_symbol (symbol
);
2108 else if (SECTION_STYLE (sect
) == SECTION_NOSWITCH
)
2109 assemble_noswitch_variable (decl
, name
, sect
, align
);
2112 /* The following bit of code ensures that vtable_map
2113 variables are not only in the comdat section, but that
2114 each variable has its own unique comdat name. If this
2115 code is removed, the variables end up in the same section
2116 with a single comdat name.
2118 FIXME: resolve_unique_section needs to deal better with
2119 decls with both DECL_SECTION_NAME and DECL_ONE_ONLY. Once
2120 that is fixed, this if-else statement can be replaced with
2121 a single call to "switch_to_section (sect)". */
2122 if (sect
->named
.name
2123 && (strcmp (sect
->named
.name
, ".vtable_map_vars") == 0))
2125 #if defined (OBJECT_FORMAT_ELF)
2126 targetm
.asm_out
.named_section (sect
->named
.name
,
2127 sect
->named
.common
.flags
2132 switch_to_section (sect
);
2136 switch_to_section (sect
);
2137 if (align
> BITS_PER_UNIT
)
2138 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (align
/ BITS_PER_UNIT
));
2139 assemble_variable_contents (decl
, name
, dont_output_data
);
2142 unsigned HOST_WIDE_INT
int size
2143 = tree_low_cst (DECL_SIZE_UNIT (decl
), 1);
2144 assemble_zeros (asan_red_zone_size (size
));
2150 /* Given a function declaration (FN_DECL), this function assembles the
2151 function into the .preinit_array section. */
2154 assemble_vtv_preinit_initializer (tree fn_decl
)
2157 unsigned flags
= SECTION_WRITE
;
2158 rtx symbol
= XEXP (DECL_RTL (fn_decl
), 0);
2160 flags
|= SECTION_NOTYPE
;
2161 sect
= get_section (".preinit_array", flags
, fn_decl
);
2162 switch_to_section (sect
);
2163 assemble_addr_to_section (symbol
, sect
);
2166 /* Return 1 if type TYPE contains any pointers. */
2169 contains_pointers_p (tree type
)
2171 switch (TREE_CODE (type
))
2174 case REFERENCE_TYPE
:
2175 /* I'm not sure whether OFFSET_TYPE needs this treatment,
2176 so I'll play safe and return 1. */
2182 case QUAL_UNION_TYPE
:
2185 /* For a type that has fields, see if the fields have pointers. */
2186 for (fields
= TYPE_FIELDS (type
); fields
; fields
= DECL_CHAIN (fields
))
2187 if (TREE_CODE (fields
) == FIELD_DECL
2188 && contains_pointers_p (TREE_TYPE (fields
)))
2194 /* An array type contains pointers if its element type does. */
2195 return contains_pointers_p (TREE_TYPE (type
));
2202 /* We delay assemble_external processing until
2203 the compilation unit is finalized. This is the best we can do for
2204 right now (i.e. stage 3 of GCC 4.0) - the right thing is to delay
2205 it all the way to final. See PR 17982 for further discussion. */
2206 static GTY(()) tree pending_assemble_externals
;
2208 #ifdef ASM_OUTPUT_EXTERNAL
2209 /* Some targets delay some output to final using TARGET_ASM_FILE_END.
2210 As a result, assemble_external can be called after the list of externals
2211 is processed and the pointer set destroyed. */
2212 static bool pending_assemble_externals_processed
;
2214 /* Avoid O(external_decls**2) lookups in the pending_assemble_externals
2215 TREE_LIST in assemble_external. */
2216 static struct pointer_set_t
*pending_assemble_externals_set
;
2218 /* True if DECL is a function decl for which no out-of-line copy exists.
2219 It is assumed that DECL's assembler name has been set. */
2222 incorporeal_function_p (tree decl
)
2224 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (decl
))
2228 if (DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
2229 && (DECL_FUNCTION_CODE (decl
) == BUILT_IN_ALLOCA
2230 || DECL_FUNCTION_CODE (decl
) == BUILT_IN_ALLOCA_WITH_ALIGN
))
2233 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
2234 /* Atomic or sync builtins which have survived this far will be
2235 resolved externally and therefore are not incorporeal. */
2236 if (strncmp (name
, "__builtin_", 10) == 0)
2242 /* Actually do the tests to determine if this is necessary, and invoke
2243 ASM_OUTPUT_EXTERNAL. */
2245 assemble_external_real (tree decl
)
2247 rtx rtl
= DECL_RTL (decl
);
2249 if (MEM_P (rtl
) && GET_CODE (XEXP (rtl
, 0)) == SYMBOL_REF
2250 && !SYMBOL_REF_USED (XEXP (rtl
, 0))
2251 && !incorporeal_function_p (decl
))
2253 /* Some systems do require some output. */
2254 SYMBOL_REF_USED (XEXP (rtl
, 0)) = 1;
2255 ASM_OUTPUT_EXTERNAL (asm_out_file
, decl
, XSTR (XEXP (rtl
, 0), 0));
2261 process_pending_assemble_externals (void)
2263 #ifdef ASM_OUTPUT_EXTERNAL
2265 for (list
= pending_assemble_externals
; list
; list
= TREE_CHAIN (list
))
2266 assemble_external_real (TREE_VALUE (list
));
2268 pending_assemble_externals
= 0;
2269 pending_assemble_externals_processed
= true;
2270 pointer_set_destroy (pending_assemble_externals_set
);
2274 /* This TREE_LIST contains any weak symbol declarations waiting
2276 static GTY(()) tree weak_decls
;
2278 /* Output something to declare an external symbol to the assembler,
2279 and qualifiers such as weakness. (Most assemblers don't need
2280 extern declaration, so we normally output nothing.) Do nothing if
2281 DECL is not external. */
2284 assemble_external (tree decl ATTRIBUTE_UNUSED
)
2286 /* Make sure that the ASM_OUT_FILE is open.
2287 If it's not, we should not be calling this function. */
2288 gcc_assert (asm_out_file
);
2290 /* In a perfect world, the following condition would be true.
2291 Sadly, the Java and Go front ends emit assembly *from the front end*,
2292 bypassing the call graph. See PR52739. Fix before GCC 4.8. */
2294 /* This function should only be called if we are expanding, or have
2296 Ideally, only final.c would be calling this function, but it is
2297 not clear whether that would break things somehow. See PR 17982
2298 for further discussion. */
2299 gcc_assert (cgraph_state
== CGRAPH_STATE_EXPANSION
2300 || cgraph_state
== CGRAPH_STATE_FINISHED
);
2303 if (!DECL_P (decl
) || !DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
))
2306 /* We want to output annotation for weak and external symbols at
2307 very last to check if they are references or not. */
2309 if (TARGET_SUPPORTS_WEAK
2311 /* TREE_STATIC is a weird and abused creature which is not
2312 generally the right test for whether an entity has been
2313 locally emitted, inlined or otherwise not-really-extern, but
2314 for declarations that can be weak, it happens to be
2316 && !TREE_STATIC (decl
)
2317 && lookup_attribute ("weak", DECL_ATTRIBUTES (decl
))
2318 && value_member (decl
, weak_decls
) == NULL_TREE
)
2319 weak_decls
= tree_cons (NULL
, decl
, weak_decls
);
2321 #ifdef ASM_OUTPUT_EXTERNAL
2322 if (pending_assemble_externals_processed
)
2324 assemble_external_real (decl
);
2328 if (! pointer_set_insert (pending_assemble_externals_set
, decl
))
2329 pending_assemble_externals
= tree_cons (NULL
, decl
,
2330 pending_assemble_externals
);
2334 /* Similar, for calling a library function FUN. */
2337 assemble_external_libcall (rtx fun
)
2339 /* Declare library function name external when first used, if nec. */
2340 if (! SYMBOL_REF_USED (fun
))
2342 SYMBOL_REF_USED (fun
) = 1;
2343 targetm
.asm_out
.external_libcall (fun
);
2347 /* Assemble a label named NAME. */
2350 assemble_label (FILE *file
, const char *name
)
2352 ASM_OUTPUT_LABEL (file
, name
);
2355 /* Set the symbol_referenced flag for ID. */
2357 mark_referenced (tree id
)
2359 TREE_SYMBOL_REFERENCED (id
) = 1;
2362 /* Set the symbol_referenced flag for DECL and notify callgraph. */
2364 mark_decl_referenced (tree decl
)
2366 if (TREE_CODE (decl
) == FUNCTION_DECL
)
2368 /* Extern inline functions don't become needed when referenced.
2369 If we know a method will be emitted in other TU and no new
2370 functions can be marked reachable, just use the external
2372 struct cgraph_node
*node
= cgraph_get_create_node (decl
);
2373 if (!DECL_EXTERNAL (decl
)
2374 && !node
->symbol
.definition
)
2375 cgraph_mark_force_output_node (node
);
2377 else if (TREE_CODE (decl
) == VAR_DECL
)
2379 struct varpool_node
*node
= varpool_node_for_decl (decl
);
2380 /* C++ frontend use mark_decl_references to force COMDAT variables
2381 to be output that might appear dead otherwise. */
2382 node
->symbol
.force_output
= true;
2384 /* else do nothing - we can get various sorts of CST nodes here,
2385 which do not need to be marked. */
2389 /* Follow the IDENTIFIER_TRANSPARENT_ALIAS chain starting at *ALIAS
2390 until we find an identifier that is not itself a transparent alias.
2391 Modify the alias passed to it by reference (and all aliases on the
2392 way to the ultimate target), such that they do not have to be
2393 followed again, and return the ultimate target of the alias
2397 ultimate_transparent_alias_target (tree
*alias
)
2399 tree target
= *alias
;
2401 if (IDENTIFIER_TRANSPARENT_ALIAS (target
))
2403 gcc_assert (TREE_CHAIN (target
));
2404 target
= ultimate_transparent_alias_target (&TREE_CHAIN (target
));
2405 gcc_assert (! IDENTIFIER_TRANSPARENT_ALIAS (target
)
2406 && ! TREE_CHAIN (target
));
2413 /* Output to FILE (an assembly file) a reference to NAME. If NAME
2414 starts with a *, the rest of NAME is output verbatim. Otherwise
2415 NAME is transformed in a target-specific way (usually by the
2416 addition of an underscore). */
2419 assemble_name_raw (FILE *file
, const char *name
)
2422 fputs (&name
[1], file
);
2424 ASM_OUTPUT_LABELREF (file
, name
);
2427 /* Like assemble_name_raw, but should be used when NAME might refer to
2428 an entity that is also represented as a tree (like a function or
2429 variable). If NAME does refer to such an entity, that entity will
2430 be marked as referenced. */
2433 assemble_name (FILE *file
, const char *name
)
2435 const char *real_name
;
2438 real_name
= targetm
.strip_name_encoding (name
);
2440 id
= maybe_get_identifier (real_name
);
2445 mark_referenced (id
);
2446 ultimate_transparent_alias_target (&id
);
2448 name
= IDENTIFIER_POINTER (id
);
2449 gcc_assert (! TREE_CHAIN (id
));
2452 assemble_name_raw (file
, name
);
2455 /* Allocate SIZE bytes writable static space with a gensym name
2456 and return an RTX to refer to its address. */
2459 assemble_static_space (unsigned HOST_WIDE_INT size
)
2462 const char *namestring
;
2465 ASM_GENERATE_INTERNAL_LABEL (name
, "LF", const_labelno
);
2467 namestring
= ggc_strdup (name
);
2469 x
= gen_rtx_SYMBOL_REF (Pmode
, namestring
);
2470 SYMBOL_REF_FLAGS (x
) = SYMBOL_FLAG_LOCAL
;
2472 #ifdef ASM_OUTPUT_ALIGNED_DECL_LOCAL
2473 ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file
, NULL_TREE
, name
, size
,
2476 #ifdef ASM_OUTPUT_ALIGNED_LOCAL
2477 ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file
, name
, size
, BIGGEST_ALIGNMENT
);
2480 /* Round size up to multiple of BIGGEST_ALIGNMENT bits
2481 so that each uninitialized object starts on such a boundary. */
2482 /* Variable `rounded' might or might not be used in ASM_OUTPUT_LOCAL. */
2483 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
2484 = ((size
+ (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
) - 1)
2485 / (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
)
2486 * (BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
));
2487 ASM_OUTPUT_LOCAL (asm_out_file
, name
, size
, rounded
);
2494 /* Assemble the static constant template for function entry trampolines.
2495 This is done at most once per compilation.
2496 Returns an RTX for the address of the template. */
2498 static GTY(()) rtx initial_trampoline
;
2501 assemble_trampoline_template (void)
2508 gcc_assert (targetm
.asm_out
.trampoline_template
!= NULL
);
2510 if (initial_trampoline
)
2511 return initial_trampoline
;
2513 /* By default, put trampoline templates in read-only data section. */
2515 #ifdef TRAMPOLINE_SECTION
2516 switch_to_section (TRAMPOLINE_SECTION
);
2518 switch_to_section (readonly_data_section
);
2521 /* Write the assembler code to define one. */
2522 align
= floor_log2 (TRAMPOLINE_ALIGNMENT
/ BITS_PER_UNIT
);
2524 ASM_OUTPUT_ALIGN (asm_out_file
, align
);
2526 targetm
.asm_out
.internal_label (asm_out_file
, "LTRAMP", 0);
2527 targetm
.asm_out
.trampoline_template (asm_out_file
);
2529 /* Record the rtl to refer to it. */
2530 ASM_GENERATE_INTERNAL_LABEL (label
, "LTRAMP", 0);
2531 name
= ggc_strdup (label
);
2532 symbol
= gen_rtx_SYMBOL_REF (Pmode
, name
);
2533 SYMBOL_REF_FLAGS (symbol
) = SYMBOL_FLAG_LOCAL
;
2535 initial_trampoline
= gen_const_mem (BLKmode
, symbol
);
2536 set_mem_align (initial_trampoline
, TRAMPOLINE_ALIGNMENT
);
2537 set_mem_size (initial_trampoline
, TRAMPOLINE_SIZE
);
2539 return initial_trampoline
;
2542 /* A and B are either alignments or offsets. Return the minimum alignment
2543 that may be assumed after adding the two together. */
2545 static inline unsigned
2546 min_align (unsigned int a
, unsigned int b
)
2548 return (a
| b
) & -(a
| b
);
2551 /* Return the assembler directive for creating a given kind of integer
2552 object. SIZE is the number of bytes in the object and ALIGNED_P
2553 indicates whether it is known to be aligned. Return NULL if the
2554 assembly dialect has no such directive.
2556 The returned string should be printed at the start of a new line and
2557 be followed immediately by the object's initial value. */
2560 integer_asm_op (int size
, int aligned_p
)
2562 struct asm_int_op
*ops
;
2565 ops
= &targetm
.asm_out
.aligned_op
;
2567 ops
= &targetm
.asm_out
.unaligned_op
;
2572 return targetm
.asm_out
.byte_op
;
2586 /* Use directive OP to assemble an integer object X. Print OP at the
2587 start of the line, followed immediately by the value of X. */
2590 assemble_integer_with_op (const char *op
, rtx x
)
2592 fputs (op
, asm_out_file
);
2593 output_addr_const (asm_out_file
, x
);
2594 fputc ('\n', asm_out_file
);
2597 /* The default implementation of the asm_out.integer target hook. */
2600 default_assemble_integer (rtx x ATTRIBUTE_UNUSED
,
2601 unsigned int size ATTRIBUTE_UNUSED
,
2602 int aligned_p ATTRIBUTE_UNUSED
)
2604 const char *op
= integer_asm_op (size
, aligned_p
);
2605 /* Avoid GAS bugs for large values. Specifically negative values whose
2606 absolute value fits in a bfd_vma, but not in a bfd_signed_vma. */
2607 if (size
> UNITS_PER_WORD
&& size
> POINTER_SIZE
/ BITS_PER_UNIT
)
2609 return op
&& (assemble_integer_with_op (op
, x
), true);
2612 /* Assemble the integer constant X into an object of SIZE bytes. ALIGN is
2613 the alignment of the integer in bits. Return 1 if we were able to output
2614 the constant, otherwise 0. We must be able to output the constant,
2615 if FORCE is nonzero. */
2618 assemble_integer (rtx x
, unsigned int size
, unsigned int align
, int force
)
2622 aligned_p
= (align
>= MIN (size
* BITS_PER_UNIT
, BIGGEST_ALIGNMENT
));
2624 /* See if the target hook can handle this kind of object. */
2625 if (targetm
.asm_out
.integer (x
, size
, aligned_p
))
2628 /* If the object is a multi-byte one, try splitting it up. Split
2629 it into words it if is multi-word, otherwise split it into bytes. */
2632 enum machine_mode omode
, imode
;
2633 unsigned int subalign
;
2634 unsigned int subsize
, i
;
2635 enum mode_class mclass
;
2637 subsize
= size
> UNITS_PER_WORD
? UNITS_PER_WORD
: 1;
2638 subalign
= MIN (align
, subsize
* BITS_PER_UNIT
);
2639 if (GET_CODE (x
) == CONST_FIXED
)
2640 mclass
= GET_MODE_CLASS (GET_MODE (x
));
2644 omode
= mode_for_size (subsize
* BITS_PER_UNIT
, mclass
, 0);
2645 imode
= mode_for_size (size
* BITS_PER_UNIT
, mclass
, 0);
2647 for (i
= 0; i
< size
; i
+= subsize
)
2649 rtx partial
= simplify_subreg (omode
, x
, imode
, i
);
2650 if (!partial
|| !assemble_integer (partial
, subsize
, subalign
, 0))
2656 /* If we've printed some of it, but not all of it, there's no going
2661 gcc_assert (!force
);
2667 assemble_real (REAL_VALUE_TYPE d
, enum machine_mode mode
, unsigned int align
)
2669 long data
[4] = {0, 0, 0, 0};
2671 int bitsize
, nelts
, nunits
, units_per
;
2673 /* This is hairy. We have a quantity of known size. real_to_target
2674 will put it into an array of *host* longs, 32 bits per element
2675 (even if long is more than 32 bits). We need to determine the
2676 number of array elements that are occupied (nelts) and the number
2677 of *target* min-addressable units that will be occupied in the
2678 object file (nunits). We cannot assume that 32 divides the
2679 mode's bitsize (size * BITS_PER_UNIT) evenly.
2681 size * BITS_PER_UNIT is used here to make sure that padding bits
2682 (which might appear at either end of the value; real_to_target
2683 will include the padding bits in its output array) are included. */
2685 nunits
= GET_MODE_SIZE (mode
);
2686 bitsize
= nunits
* BITS_PER_UNIT
;
2687 nelts
= CEIL (bitsize
, 32);
2688 units_per
= 32 / BITS_PER_UNIT
;
2690 real_to_target (data
, &d
, mode
);
2692 /* Put out the first word with the specified alignment. */
2693 assemble_integer (GEN_INT (data
[0]), MIN (nunits
, units_per
), align
, 1);
2694 nunits
-= units_per
;
2696 /* Subsequent words need only 32-bit alignment. */
2697 align
= min_align (align
, 32);
2699 for (i
= 1; i
< nelts
; i
++)
2701 assemble_integer (GEN_INT (data
[i
]), MIN (nunits
, units_per
), align
, 1);
2702 nunits
-= units_per
;
2706 /* Given an expression EXP with a constant value,
2707 reduce it to the sum of an assembler symbol and an integer.
2708 Store them both in the structure *VALUE.
2709 EXP must be reducible. */
2713 HOST_WIDE_INT offset
;
2717 decode_addr_const (tree exp
, struct addr_const
*value
)
2719 tree target
= TREE_OPERAND (exp
, 0);
2725 if (TREE_CODE (target
) == COMPONENT_REF
2726 && host_integerp (byte_position (TREE_OPERAND (target
, 1)), 0))
2728 offset
+= int_byte_position (TREE_OPERAND (target
, 1));
2729 target
= TREE_OPERAND (target
, 0);
2731 else if (TREE_CODE (target
) == ARRAY_REF
2732 || TREE_CODE (target
) == ARRAY_RANGE_REF
)
2734 offset
+= (tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (target
)), 1)
2735 * tree_low_cst (TREE_OPERAND (target
, 1), 0));
2736 target
= TREE_OPERAND (target
, 0);
2738 else if (TREE_CODE (target
) == MEM_REF
2739 && TREE_CODE (TREE_OPERAND (target
, 0)) == ADDR_EXPR
)
2741 offset
+= mem_ref_offset (target
).low
;
2742 target
= TREE_OPERAND (TREE_OPERAND (target
, 0), 0);
2744 else if (TREE_CODE (target
) == INDIRECT_REF
2745 && TREE_CODE (TREE_OPERAND (target
, 0)) == NOP_EXPR
2746 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (target
, 0), 0))
2748 target
= TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (target
, 0), 0), 0);
2753 switch (TREE_CODE (target
))
2757 x
= DECL_RTL (target
);
2761 x
= gen_rtx_MEM (FUNCTION_MODE
,
2762 gen_rtx_LABEL_REF (Pmode
, force_label_rtx (target
)));
2771 x
= output_constant_def (target
, 1);
2778 gcc_assert (MEM_P (x
));
2782 value
->offset
= offset
;
2786 static GTY((param_is (struct constant_descriptor_tree
)))
2787 htab_t const_desc_htab
;
2789 static void maybe_output_constant_def_contents (struct constant_descriptor_tree
*, int);
2791 /* Constant pool accessor function. */
2794 constant_pool_htab (void)
2796 return const_desc_htab
;
2799 /* Compute a hash code for a constant expression. */
2802 const_desc_hash (const void *ptr
)
2804 return ((const struct constant_descriptor_tree
*)ptr
)->hash
;
2808 const_hash_1 (const tree exp
)
2813 enum tree_code code
= TREE_CODE (exp
);
2815 /* Either set P and LEN to the address and len of something to hash and
2816 exit the switch or return a value. */
2821 p
= (char *) &TREE_INT_CST (exp
);
2822 len
= sizeof TREE_INT_CST (exp
);
2826 return real_hash (TREE_REAL_CST_PTR (exp
));
2829 return fixed_hash (TREE_FIXED_CST_PTR (exp
));
2832 p
= TREE_STRING_POINTER (exp
);
2833 len
= TREE_STRING_LENGTH (exp
);
2837 return (const_hash_1 (TREE_REALPART (exp
)) * 5
2838 + const_hash_1 (TREE_IMAGPART (exp
)));
2844 hi
= 7 + VECTOR_CST_NELTS (exp
);
2846 for (i
= 0; i
< VECTOR_CST_NELTS (exp
); ++i
)
2847 hi
= hi
* 563 + const_hash_1 (VECTOR_CST_ELT (exp
, i
));
2854 unsigned HOST_WIDE_INT idx
;
2857 hi
= 5 + int_size_in_bytes (TREE_TYPE (exp
));
2859 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp
), idx
, value
)
2861 hi
= hi
* 603 + const_hash_1 (value
);
2869 struct addr_const value
;
2871 decode_addr_const (exp
, &value
);
2872 switch (GET_CODE (value
.base
))
2875 /* Don't hash the address of the SYMBOL_REF;
2876 only use the offset and the symbol name. */
2878 p
= XSTR (value
.base
, 0);
2879 for (i
= 0; p
[i
] != 0; i
++)
2880 hi
= ((hi
* 613) + (unsigned) (p
[i
]));
2884 hi
= value
.offset
+ CODE_LABEL_NUMBER (XEXP (value
.base
, 0)) * 13;
2894 case POINTER_PLUS_EXPR
:
2896 return (const_hash_1 (TREE_OPERAND (exp
, 0)) * 9
2897 + const_hash_1 (TREE_OPERAND (exp
, 1)));
2900 return const_hash_1 (TREE_OPERAND (exp
, 0)) * 7 + 2;
2903 /* A language specific constant. Just hash the code. */
2907 /* Compute hashing function. */
2909 for (i
= 0; i
< len
; i
++)
2910 hi
= ((hi
* 613) + (unsigned) (p
[i
]));
2915 /* Wrapper of compare_constant, for the htab interface. */
2917 const_desc_eq (const void *p1
, const void *p2
)
2919 const struct constant_descriptor_tree
*const c1
2920 = (const struct constant_descriptor_tree
*) p1
;
2921 const struct constant_descriptor_tree
*const c2
2922 = (const struct constant_descriptor_tree
*) p2
;
2923 if (c1
->hash
!= c2
->hash
)
2925 return compare_constant (c1
->value
, c2
->value
);
2928 /* Compare t1 and t2, and return 1 only if they are known to result in
2929 the same bit pattern on output. */
2932 compare_constant (const tree t1
, const tree t2
)
2934 enum tree_code typecode
;
2936 if (t1
== NULL_TREE
)
2937 return t2
== NULL_TREE
;
2938 if (t2
== NULL_TREE
)
2941 if (TREE_CODE (t1
) != TREE_CODE (t2
))
2944 switch (TREE_CODE (t1
))
2947 /* Integer constants are the same only if the same width of type. */
2948 if (TYPE_PRECISION (TREE_TYPE (t1
)) != TYPE_PRECISION (TREE_TYPE (t2
)))
2950 if (TYPE_MODE (TREE_TYPE (t1
)) != TYPE_MODE (TREE_TYPE (t2
)))
2952 return tree_int_cst_equal (t1
, t2
);
2955 /* Real constants are the same only if the same width of type. */
2956 if (TYPE_PRECISION (TREE_TYPE (t1
)) != TYPE_PRECISION (TREE_TYPE (t2
)))
2959 return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
2962 /* Fixed constants are the same only if the same width of type. */
2963 if (TYPE_PRECISION (TREE_TYPE (t1
)) != TYPE_PRECISION (TREE_TYPE (t2
)))
2966 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
2969 if (TYPE_MODE (TREE_TYPE (t1
)) != TYPE_MODE (TREE_TYPE (t2
)))
2972 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
2973 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
2974 TREE_STRING_LENGTH (t1
)));
2977 return (compare_constant (TREE_REALPART (t1
), TREE_REALPART (t2
))
2978 && compare_constant (TREE_IMAGPART (t1
), TREE_IMAGPART (t2
)));
2984 if (VECTOR_CST_NELTS (t1
) != VECTOR_CST_NELTS (t2
))
2987 for (i
= 0; i
< VECTOR_CST_NELTS (t1
); ++i
)
2988 if (!compare_constant (VECTOR_CST_ELT (t1
, i
),
2989 VECTOR_CST_ELT (t2
, i
)))
2997 vec
<constructor_elt
, va_gc
> *v1
, *v2
;
2998 unsigned HOST_WIDE_INT idx
;
3000 typecode
= TREE_CODE (TREE_TYPE (t1
));
3001 if (typecode
!= TREE_CODE (TREE_TYPE (t2
)))
3004 if (typecode
== ARRAY_TYPE
)
3006 HOST_WIDE_INT size_1
= int_size_in_bytes (TREE_TYPE (t1
));
3007 /* For arrays, check that the sizes all match. */
3008 if (TYPE_MODE (TREE_TYPE (t1
)) != TYPE_MODE (TREE_TYPE (t2
))
3010 || size_1
!= int_size_in_bytes (TREE_TYPE (t2
)))
3015 /* For record and union constructors, require exact type
3017 if (TREE_TYPE (t1
) != TREE_TYPE (t2
))
3021 v1
= CONSTRUCTOR_ELTS (t1
);
3022 v2
= CONSTRUCTOR_ELTS (t2
);
3023 if (vec_safe_length (v1
) != vec_safe_length (v2
))
3026 for (idx
= 0; idx
< vec_safe_length (v1
); ++idx
)
3028 constructor_elt
*c1
= &(*v1
)[idx
];
3029 constructor_elt
*c2
= &(*v2
)[idx
];
3031 /* Check that each value is the same... */
3032 if (!compare_constant (c1
->value
, c2
->value
))
3034 /* ... and that they apply to the same fields! */
3035 if (typecode
== ARRAY_TYPE
)
3037 if (!compare_constant (c1
->index
, c2
->index
))
3042 if (c1
->index
!= c2
->index
)
3053 struct addr_const value1
, value2
;
3057 decode_addr_const (t1
, &value1
);
3058 decode_addr_const (t2
, &value2
);
3060 if (value1
.offset
!= value2
.offset
)
3063 code
= GET_CODE (value1
.base
);
3064 if (code
!= GET_CODE (value2
.base
))
3070 ret
= (strcmp (XSTR (value1
.base
, 0), XSTR (value2
.base
, 0)) == 0);
3074 ret
= (CODE_LABEL_NUMBER (XEXP (value1
.base
, 0))
3075 == CODE_LABEL_NUMBER (XEXP (value2
.base
, 0)));
3085 case POINTER_PLUS_EXPR
:
3088 return (compare_constant (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0))
3089 && compare_constant (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1)));
3092 case VIEW_CONVERT_EXPR
:
3093 return compare_constant (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
3102 /* Make a copy of the whole tree structure for a constant. This
3103 handles the same types of nodes that compare_constant handles. */
3106 copy_constant (tree exp
)
3108 switch (TREE_CODE (exp
))
3111 /* For ADDR_EXPR, we do not want to copy the decl whose address
3112 is requested. We do want to copy constants though. */
3113 if (CONSTANT_CLASS_P (TREE_OPERAND (exp
, 0)))
3114 return build1 (TREE_CODE (exp
), TREE_TYPE (exp
),
3115 copy_constant (TREE_OPERAND (exp
, 0)));
3117 return copy_node (exp
);
3123 return copy_node (exp
);
3126 return build_complex (TREE_TYPE (exp
),
3127 copy_constant (TREE_REALPART (exp
)),
3128 copy_constant (TREE_IMAGPART (exp
)));
3131 case POINTER_PLUS_EXPR
:
3133 return build2 (TREE_CODE (exp
), TREE_TYPE (exp
),
3134 copy_constant (TREE_OPERAND (exp
, 0)),
3135 copy_constant (TREE_OPERAND (exp
, 1)));
3138 case VIEW_CONVERT_EXPR
:
3139 return build1 (TREE_CODE (exp
), TREE_TYPE (exp
),
3140 copy_constant (TREE_OPERAND (exp
, 0)));
3143 return build_vector (TREE_TYPE (exp
), VECTOR_CST_ELTS (exp
));
3147 tree copy
= copy_node (exp
);
3148 vec
<constructor_elt
, va_gc
> *v
;
3149 unsigned HOST_WIDE_INT idx
;
3150 tree purpose
, value
;
3152 vec_alloc (v
, vec_safe_length (CONSTRUCTOR_ELTS (exp
)));
3153 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (exp
), idx
, purpose
, value
)
3155 constructor_elt ce
= {purpose
, copy_constant (value
)};
3158 CONSTRUCTOR_ELTS (copy
) = v
;
3167 /* Return the section into which constant EXP should be placed. */
3170 get_constant_section (tree exp
, unsigned int align
)
3172 return targetm
.asm_out
.select_section (exp
,
3173 compute_reloc_for_constant (exp
),
3177 /* Return the size of constant EXP in bytes. */
3179 static HOST_WIDE_INT
3180 get_constant_size (tree exp
)
3184 size
= int_size_in_bytes (TREE_TYPE (exp
));
3185 if (TREE_CODE (exp
) == STRING_CST
)
3186 size
= MAX (TREE_STRING_LENGTH (exp
), size
);
3190 /* Subroutine of output_constant_def:
3191 No constant equal to EXP is known to have been output.
3192 Make a constant descriptor to enter EXP in the hash table.
3193 Assign the label number and construct RTL to refer to the
3194 constant's location in memory.
3195 Caller is responsible for updating the hash table. */
3197 static struct constant_descriptor_tree
*
3198 build_constant_desc (tree exp
)
3200 struct constant_descriptor_tree
*desc
;
3206 desc
= ggc_alloc_constant_descriptor_tree ();
3207 desc
->value
= copy_constant (exp
);
3209 /* Propagate marked-ness to copied constant. */
3210 if (flag_mudflap
&& mf_marked_p (exp
))
3211 mf_mark (desc
->value
);
3213 /* Create a string containing the label name, in LABEL. */
3214 labelno
= const_labelno
++;
3215 ASM_GENERATE_INTERNAL_LABEL (label
, "LC", labelno
);
3217 /* Construct the VAR_DECL associated with the constant. */
3218 decl
= build_decl (UNKNOWN_LOCATION
, VAR_DECL
, get_identifier (label
),
3220 DECL_ARTIFICIAL (decl
) = 1;
3221 DECL_IGNORED_P (decl
) = 1;
3222 TREE_READONLY (decl
) = 1;
3223 TREE_STATIC (decl
) = 1;
3224 TREE_ADDRESSABLE (decl
) = 1;
3225 /* We don't set the RTL yet as this would cause varpool to assume that the
3226 variable is referenced. Moreover, it would just be dropped in LTO mode.
3227 Instead we set the flag that will be recognized in make_decl_rtl. */
3228 DECL_IN_CONSTANT_POOL (decl
) = 1;
3229 DECL_INITIAL (decl
) = desc
->value
;
3230 /* ??? CONSTANT_ALIGNMENT hasn't been updated for vector types on most
3231 architectures so use DATA_ALIGNMENT as well, except for strings. */
3232 if (TREE_CODE (exp
) == STRING_CST
)
3234 #ifdef CONSTANT_ALIGNMENT
3235 DECL_ALIGN (decl
) = CONSTANT_ALIGNMENT (exp
, DECL_ALIGN (decl
));
3239 align_variable (decl
, 0);
3241 /* Now construct the SYMBOL_REF and the MEM. */
3242 if (use_object_blocks_p ())
3244 section
*sect
= get_constant_section (exp
, DECL_ALIGN (decl
));
3245 symbol
= create_block_symbol (ggc_strdup (label
),
3246 get_block_for_section (sect
), -1);
3249 symbol
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (label
));
3250 SYMBOL_REF_FLAGS (symbol
) |= SYMBOL_FLAG_LOCAL
;
3251 SET_SYMBOL_REF_DECL (symbol
, decl
);
3252 TREE_CONSTANT_POOL_ADDRESS_P (symbol
) = 1;
3254 rtl
= gen_const_mem (TYPE_MODE (TREE_TYPE (exp
)), symbol
);
3255 set_mem_attributes (rtl
, exp
, 1);
3256 set_mem_alias_set (rtl
, 0);
3257 set_mem_alias_set (rtl
, const_alias_set
);
3259 /* We cannot share RTX'es in pool entries.
3260 Mark this piece of RTL as required for unsharing. */
3261 RTX_FLAG (rtl
, used
) = 1;
3263 /* Set flags or add text to the name to record information, such as
3264 that it is a local symbol. If the name is changed, the macro
3265 ASM_OUTPUT_LABELREF will have to know how to strip this
3266 information. This call might invalidate our local variable
3267 SYMBOL; we can't use it afterward. */
3268 targetm
.encode_section_info (exp
, rtl
, true);
3275 /* Return an rtx representing a reference to constant data in memory
3276 for the constant expression EXP.
3278 If assembler code for such a constant has already been output,
3279 return an rtx to refer to it.
3280 Otherwise, output such a constant in memory
3281 and generate an rtx for it.
3283 If DEFER is nonzero, this constant can be deferred and output only
3284 if referenced in the function after all optimizations.
3286 `const_desc_table' records which constants already have label strings. */
3289 output_constant_def (tree exp
, int defer
)
3291 struct constant_descriptor_tree
*desc
;
3292 struct constant_descriptor_tree key
;
3295 /* Look up EXP in the table of constant descriptors. If we didn't find
3296 it, create a new one. */
3298 key
.hash
= const_hash_1 (exp
);
3299 loc
= htab_find_slot_with_hash (const_desc_htab
, &key
, key
.hash
, INSERT
);
3301 desc
= (struct constant_descriptor_tree
*) *loc
;
3304 desc
= build_constant_desc (exp
);
3305 desc
->hash
= key
.hash
;
3309 maybe_output_constant_def_contents (desc
, defer
);
3313 /* Subroutine of output_constant_def: Decide whether or not we need to
3314 output the constant DESC now, and if so, do it. */
3316 maybe_output_constant_def_contents (struct constant_descriptor_tree
*desc
,
3319 rtx symbol
= XEXP (desc
->rtl
, 0);
3320 tree exp
= desc
->value
;
3322 if (flag_syntax_only
)
3325 if (TREE_ASM_WRITTEN (exp
))
3326 /* Already output; don't do it again. */
3329 /* We can always defer constants as long as the context allows
3333 /* Increment n_deferred_constants if it exists. It needs to be at
3334 least as large as the number of constants actually referred to
3335 by the function. If it's too small we'll stop looking too early
3336 and fail to emit constants; if it's too large we'll only look
3337 through the entire function when we could have stopped earlier. */
3339 n_deferred_constants
++;
3343 output_constant_def_contents (symbol
);
3346 /* Subroutine of output_constant_def_contents. Output the definition
3347 of constant EXP, which is pointed to by label LABEL. ALIGN is the
3348 constant's alignment in bits. */
3351 assemble_constant_contents (tree exp
, const char *label
, unsigned int align
)
3355 size
= get_constant_size (exp
);
3357 /* Do any machine/system dependent processing of the constant. */
3358 targetm
.asm_out
.declare_constant_name (asm_out_file
, label
, exp
, size
);
3360 /* Output the value of EXP. */
3361 output_constant (exp
, size
, align
);
3364 /* We must output the constant data referred to by SYMBOL; do so. */
3367 output_constant_def_contents (rtx symbol
)
3369 tree decl
= SYMBOL_REF_DECL (symbol
);
3370 tree exp
= DECL_INITIAL (decl
);
3372 bool asan_protected
= false;
3374 /* Make sure any other constants whose addresses appear in EXP
3375 are assigned label numbers. */
3376 output_addressed_constants (exp
);
3378 /* We are no longer deferring this constant. */
3379 TREE_ASM_WRITTEN (decl
) = TREE_ASM_WRITTEN (exp
) = 1;
3381 if ((flag_sanitize
& SANITIZE_ADDRESS
)
3382 && TREE_CODE (exp
) == STRING_CST
3383 && asan_protect_global (exp
))
3385 asan_protected
= true;
3386 DECL_ALIGN (decl
) = MAX (DECL_ALIGN (decl
),
3387 ASAN_RED_ZONE_SIZE
* BITS_PER_UNIT
);
3390 /* If the constant is part of an object block, make sure that the
3391 decl has been positioned within its block, but do not write out
3392 its definition yet. output_object_blocks will do that later. */
3393 if (SYMBOL_REF_HAS_BLOCK_INFO_P (symbol
) && SYMBOL_REF_BLOCK (symbol
))
3394 place_block_symbol (symbol
);
3397 align
= DECL_ALIGN (decl
);
3398 switch_to_section (get_constant_section (exp
, align
));
3399 if (align
> BITS_PER_UNIT
)
3400 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (align
/ BITS_PER_UNIT
));
3401 assemble_constant_contents (exp
, XSTR (symbol
, 0), align
);
3404 HOST_WIDE_INT size
= get_constant_size (exp
);
3405 assemble_zeros (asan_red_zone_size (size
));
3409 mudflap_enqueue_constant (exp
);
3412 /* Look up EXP in the table of constant descriptors. Return the rtl
3413 if it has been emitted, else null. */
3416 lookup_constant_def (tree exp
)
3418 struct constant_descriptor_tree
*desc
;
3419 struct constant_descriptor_tree key
;
3422 key
.hash
= const_hash_1 (exp
);
3423 desc
= (struct constant_descriptor_tree
*)
3424 htab_find_with_hash (const_desc_htab
, &key
, key
.hash
);
3426 return (desc
? desc
->rtl
: NULL_RTX
);
3429 /* Return a tree representing a reference to constant data in memory
3430 for the constant expression EXP.
3432 This is the counterpart of output_constant_def at the Tree level. */
3435 tree_output_constant_def (tree exp
)
3437 struct constant_descriptor_tree
*desc
, key
;
3441 /* Look up EXP in the table of constant descriptors. If we didn't find
3442 it, create a new one. */
3444 key
.hash
= const_hash_1 (exp
);
3445 loc
= htab_find_slot_with_hash (const_desc_htab
, &key
, key
.hash
, INSERT
);
3447 desc
= (struct constant_descriptor_tree
*) *loc
;
3450 desc
= build_constant_desc (exp
);
3451 desc
->hash
= key
.hash
;
3455 decl
= SYMBOL_REF_DECL (XEXP (desc
->rtl
, 0));
3456 varpool_finalize_decl (decl
);
3460 /* Used in the hash tables to avoid outputting the same constant
3461 twice. Unlike 'struct constant_descriptor_tree', RTX constants
3462 are output once per function, not once per file. */
3463 /* ??? Only a few targets need per-function constant pools. Most
3464 can use one per-file pool. Should add a targetm bit to tell the
3467 struct GTY(()) rtx_constant_pool
{
3468 /* Pointers to first and last constant in pool, as ordered by offset. */
3469 struct constant_descriptor_rtx
*first
;
3470 struct constant_descriptor_rtx
*last
;
3472 /* Hash facility for making memory-constants from constant rtl-expressions.
3473 It is used on RISC machines where immediate integer arguments and
3474 constant addresses are restricted so that such constants must be stored
3476 htab_t
GTY((param_is (struct constant_descriptor_rtx
))) const_rtx_htab
;
3478 /* Current offset in constant pool (does not include any
3479 machine-specific header). */
3480 HOST_WIDE_INT offset
;
3483 struct GTY((chain_next ("%h.next"))) constant_descriptor_rtx
{
3484 struct constant_descriptor_rtx
*next
;
3488 HOST_WIDE_INT offset
;
3490 enum machine_mode mode
;
3496 /* Hash and compare functions for const_rtx_htab. */
3499 const_desc_rtx_hash (const void *ptr
)
3501 const struct constant_descriptor_rtx
*const desc
3502 = (const struct constant_descriptor_rtx
*) ptr
;
3507 const_desc_rtx_eq (const void *a
, const void *b
)
3509 const struct constant_descriptor_rtx
*const x
3510 = (const struct constant_descriptor_rtx
*) a
;
3511 const struct constant_descriptor_rtx
*const y
3512 = (const struct constant_descriptor_rtx
*) b
;
3514 if (x
->mode
!= y
->mode
)
3516 return rtx_equal_p (x
->constant
, y
->constant
);
3519 /* This is the worker function for const_rtx_hash, called via for_each_rtx. */
3522 const_rtx_hash_1 (rtx
*xp
, void *data
)
3524 unsigned HOST_WIDE_INT hwi
;
3525 enum machine_mode mode
;
3531 code
= GET_CODE (x
);
3532 mode
= GET_MODE (x
);
3533 h
= (hashval_t
) code
* 1048573 + mode
;
3541 int shift
= sizeof (hashval_t
) * CHAR_BIT
;
3542 const int n
= sizeof (HOST_WIDE_INT
) / sizeof (hashval_t
);
3545 h
^= (hashval_t
) hwi
;
3546 for (i
= 1; i
< n
; ++i
)
3549 h
^= (hashval_t
) hwi
;
3555 if (mode
== VOIDmode
)
3557 hwi
= CONST_DOUBLE_LOW (x
) ^ CONST_DOUBLE_HIGH (x
);
3561 h
^= real_hash (CONST_DOUBLE_REAL_VALUE (x
));
3565 h
^= fixed_hash (CONST_FIXED_VALUE (x
));
3571 for (i
= XVECLEN (x
, 0); i
-- > 0; )
3572 h
= h
* 251 + const_rtx_hash_1 (&XVECEXP (x
, 0, i
), data
);
3577 h
^= htab_hash_string (XSTR (x
, 0));
3581 h
= h
* 251 + CODE_LABEL_NUMBER (XEXP (x
, 0));
3585 case UNSPEC_VOLATILE
:
3586 h
= h
* 251 + XINT (x
, 1);
3593 hp
= (hashval_t
*) data
;
3594 *hp
= *hp
* 509 + h
;
3598 /* Compute a hash value for X, which should be a constant. */
3601 const_rtx_hash (rtx x
)
3604 for_each_rtx (&x
, const_rtx_hash_1
, &h
);
3609 /* Create and return a new rtx constant pool. */
3611 static struct rtx_constant_pool
*
3612 create_constant_pool (void)
3614 struct rtx_constant_pool
*pool
;
3616 pool
= ggc_alloc_rtx_constant_pool ();
3617 pool
->const_rtx_htab
= htab_create_ggc (31, const_desc_rtx_hash
,
3618 const_desc_rtx_eq
, NULL
);
3625 /* Initialize constant pool hashing for a new function. */
3628 init_varasm_status (void)
3630 crtl
->varasm
.pool
= create_constant_pool ();
3631 crtl
->varasm
.deferred_constants
= 0;
3634 /* Given a MINUS expression, simplify it if both sides
3635 include the same symbol. */
3638 simplify_subtraction (rtx x
)
3640 rtx r
= simplify_rtx (x
);
3644 /* Given a constant rtx X, make (or find) a memory constant for its value
3645 and return a MEM rtx to refer to it in memory. */
3648 force_const_mem (enum machine_mode mode
, rtx x
)
3650 struct constant_descriptor_rtx
*desc
, tmp
;
3651 struct rtx_constant_pool
*pool
;
3658 /* If we're not allowed to drop X into the constant pool, don't. */
3659 if (targetm
.cannot_force_const_mem (mode
, x
))
3662 /* Record that this function has used a constant pool entry. */
3663 crtl
->uses_const_pool
= 1;
3665 /* Decide which pool to use. */
3666 pool
= (targetm
.use_blocks_for_constant_p (mode
, x
)
3667 ? shared_constant_pool
3668 : crtl
->varasm
.pool
);
3670 /* Lookup the value in the hashtable. */
3673 hash
= const_rtx_hash (x
);
3674 slot
= htab_find_slot_with_hash (pool
->const_rtx_htab
, &tmp
, hash
, INSERT
);
3675 desc
= (struct constant_descriptor_rtx
*) *slot
;
3677 /* If the constant was already present, return its memory. */
3679 return copy_rtx (desc
->mem
);
3681 /* Otherwise, create a new descriptor. */
3682 desc
= ggc_alloc_constant_descriptor_rtx ();
3685 /* Align the location counter as required by EXP's data type. */
3686 align
= GET_MODE_ALIGNMENT (mode
== VOIDmode
? word_mode
: mode
);
3687 #ifdef CONSTANT_ALIGNMENT
3689 tree type
= lang_hooks
.types
.type_for_mode (mode
, 0);
3690 if (type
!= NULL_TREE
)
3691 align
= CONSTANT_ALIGNMENT (make_tree (type
, x
), align
);
3695 pool
->offset
+= (align
/ BITS_PER_UNIT
) - 1;
3696 pool
->offset
&= ~ ((align
/ BITS_PER_UNIT
) - 1);
3699 desc
->constant
= copy_rtx (tmp
.constant
);
3700 desc
->offset
= pool
->offset
;
3703 desc
->align
= align
;
3704 desc
->labelno
= const_labelno
;
3707 pool
->offset
+= GET_MODE_SIZE (mode
);
3709 pool
->last
->next
= desc
;
3711 pool
->first
= pool
->last
= desc
;
3714 /* Create a string containing the label name, in LABEL. */
3715 ASM_GENERATE_INTERNAL_LABEL (label
, "LC", const_labelno
);
3718 /* Construct the SYMBOL_REF. Make sure to mark it as belonging to
3719 the constants pool. */
3720 if (use_object_blocks_p () && targetm
.use_blocks_for_constant_p (mode
, x
))
3722 section
*sect
= targetm
.asm_out
.select_rtx_section (mode
, x
, align
);
3723 symbol
= create_block_symbol (ggc_strdup (label
),
3724 get_block_for_section (sect
), -1);
3727 symbol
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (label
));
3729 SYMBOL_REF_FLAGS (symbol
) |= SYMBOL_FLAG_LOCAL
;
3730 CONSTANT_POOL_ADDRESS_P (symbol
) = 1;
3731 SET_SYMBOL_REF_CONSTANT (symbol
, desc
);
3733 /* Construct the MEM. */
3734 desc
->mem
= def
= gen_const_mem (mode
, symbol
);
3735 set_mem_attributes (def
, lang_hooks
.types
.type_for_mode (mode
, 0), 1);
3736 set_mem_align (def
, align
);
3738 /* If we're dropping a label to the constant pool, make sure we
3740 if (GET_CODE (x
) == LABEL_REF
)
3741 LABEL_PRESERVE_P (XEXP (x
, 0)) = 1;
3743 return copy_rtx (def
);
3746 /* Given a constant pool SYMBOL_REF, return the corresponding constant. */
3749 get_pool_constant (rtx addr
)
3751 return SYMBOL_REF_CONSTANT (addr
)->constant
;
3754 /* Given a constant pool SYMBOL_REF, return the corresponding constant
3755 and whether it has been output or not. */
3758 get_pool_constant_mark (rtx addr
, bool *pmarked
)
3760 struct constant_descriptor_rtx
*desc
;
3762 desc
= SYMBOL_REF_CONSTANT (addr
);
3763 *pmarked
= (desc
->mark
!= 0);
3764 return desc
->constant
;
3767 /* Similar, return the mode. */
3770 get_pool_mode (const_rtx addr
)
3772 return SYMBOL_REF_CONSTANT (addr
)->mode
;
3775 /* Return the size of the constant pool. */
3778 get_pool_size (void)
3780 return crtl
->varasm
.pool
->offset
;
3783 /* Worker function for output_constant_pool_1. Emit assembly for X
3784 in MODE with known alignment ALIGN. */
3787 output_constant_pool_2 (enum machine_mode mode
, rtx x
, unsigned int align
)
3789 switch (GET_MODE_CLASS (mode
))
3792 case MODE_DECIMAL_FLOAT
:
3796 gcc_assert (CONST_DOUBLE_AS_FLOAT_P (x
));
3797 REAL_VALUE_FROM_CONST_DOUBLE (r
, x
);
3798 assemble_real (r
, mode
, align
);
3803 case MODE_PARTIAL_INT
:
3808 assemble_integer (x
, GET_MODE_SIZE (mode
), align
, 1);
3811 case MODE_VECTOR_FLOAT
:
3812 case MODE_VECTOR_INT
:
3813 case MODE_VECTOR_FRACT
:
3814 case MODE_VECTOR_UFRACT
:
3815 case MODE_VECTOR_ACCUM
:
3816 case MODE_VECTOR_UACCUM
:
3819 enum machine_mode submode
= GET_MODE_INNER (mode
);
3820 unsigned int subalign
= MIN (align
, GET_MODE_BITSIZE (submode
));
3822 gcc_assert (GET_CODE (x
) == CONST_VECTOR
);
3823 units
= CONST_VECTOR_NUNITS (x
);
3825 for (i
= 0; i
< units
; i
++)
3827 rtx elt
= CONST_VECTOR_ELT (x
, i
);
3828 output_constant_pool_2 (submode
, elt
, i
? subalign
: align
);
3838 /* Worker function for output_constant_pool. Emit constant DESC,
3839 giving it ALIGN bits of alignment. */
3842 output_constant_pool_1 (struct constant_descriptor_rtx
*desc
,
3849 /* See if X is a LABEL_REF (or a CONST referring to a LABEL_REF)
3850 whose CODE_LABEL has been deleted. This can occur if a jump table
3851 is eliminated by optimization. If so, write a constant of zero
3852 instead. Note that this can also happen by turning the
3853 CODE_LABEL into a NOTE. */
3854 /* ??? This seems completely and utterly wrong. Certainly it's
3855 not true for NOTE_INSN_DELETED_LABEL, but I disbelieve proper
3856 functioning even with INSN_DELETED_P and friends. */
3859 switch (GET_CODE (tmp
))
3862 if (GET_CODE (XEXP (tmp
, 0)) != PLUS
3863 || GET_CODE (XEXP (XEXP (tmp
, 0), 0)) != LABEL_REF
)
3865 tmp
= XEXP (XEXP (tmp
, 0), 0);
3869 tmp
= XEXP (tmp
, 0);
3870 gcc_assert (!INSN_DELETED_P (tmp
));
3871 gcc_assert (!NOTE_P (tmp
)
3872 || NOTE_KIND (tmp
) != NOTE_INSN_DELETED
);
3879 #ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
3880 ASM_OUTPUT_SPECIAL_POOL_ENTRY (asm_out_file
, x
, desc
->mode
,
3881 align
, desc
->labelno
, done
);
3884 assemble_align (align
);
3886 /* Output the label. */
3887 targetm
.asm_out
.internal_label (asm_out_file
, "LC", desc
->labelno
);
3889 /* Output the data. */
3890 output_constant_pool_2 (desc
->mode
, x
, align
);
3892 /* Make sure all constants in SECTION_MERGE and not SECTION_STRINGS
3893 sections have proper size. */
3894 if (align
> GET_MODE_BITSIZE (desc
->mode
)
3896 && (in_section
->common
.flags
& SECTION_MERGE
))
3897 assemble_align (align
);
3899 #ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
3905 /* Given a SYMBOL_REF CURRENT_RTX, mark it and all constants it refers
3906 to as used. Emit referenced deferred strings. This function can
3907 be used with for_each_rtx to mark all SYMBOL_REFs in an rtx. */
3910 mark_constant (rtx
*current_rtx
, void *data ATTRIBUTE_UNUSED
)
3912 rtx x
= *current_rtx
;
3914 if (x
== NULL_RTX
|| GET_CODE (x
) != SYMBOL_REF
)
3917 if (CONSTANT_POOL_ADDRESS_P (x
))
3919 struct constant_descriptor_rtx
*desc
= SYMBOL_REF_CONSTANT (x
);
3920 if (desc
->mark
== 0)
3923 for_each_rtx (&desc
->constant
, mark_constant
, NULL
);
3926 else if (TREE_CONSTANT_POOL_ADDRESS_P (x
))
3928 tree decl
= SYMBOL_REF_DECL (x
);
3929 if (!TREE_ASM_WRITTEN (DECL_INITIAL (decl
)))
3931 n_deferred_constants
--;
3932 output_constant_def_contents (x
);
3939 /* Look through appropriate parts of INSN, marking all entries in the
3940 constant pool which are actually being used. Entries that are only
3941 referenced by other constants are also marked as used. Emit
3942 deferred strings that are used. */
3945 mark_constants (rtx insn
)
3950 /* Insns may appear inside a SEQUENCE. Only check the patterns of
3951 insns, not any notes that may be attached. We don't want to mark
3952 a constant just because it happens to appear in a REG_EQUIV note. */
3953 if (GET_CODE (PATTERN (insn
)) == SEQUENCE
)
3955 rtx seq
= PATTERN (insn
);
3956 int i
, n
= XVECLEN (seq
, 0);
3957 for (i
= 0; i
< n
; ++i
)
3959 rtx subinsn
= XVECEXP (seq
, 0, i
);
3960 if (INSN_P (subinsn
))
3961 for_each_rtx (&PATTERN (subinsn
), mark_constant
, NULL
);
3965 for_each_rtx (&PATTERN (insn
), mark_constant
, NULL
);
3968 /* Look through the instructions for this function, and mark all the
3969 entries in POOL which are actually being used. Emit deferred constants
3970 which have indeed been used. */
3973 mark_constant_pool (void)
3977 if (!crtl
->uses_const_pool
&& n_deferred_constants
== 0)
3980 for (insn
= get_insns (); insn
; insn
= NEXT_INSN (insn
))
3981 mark_constants (insn
);
3984 /* Write all the constants in POOL. */
3987 output_constant_pool_contents (struct rtx_constant_pool
*pool
)
3989 struct constant_descriptor_rtx
*desc
;
3991 for (desc
= pool
->first
; desc
; desc
= desc
->next
)
3994 /* If the constant is part of an object_block, make sure that
3995 the constant has been positioned within its block, but do not
3996 write out its definition yet. output_object_blocks will do
3998 if (SYMBOL_REF_HAS_BLOCK_INFO_P (desc
->sym
)
3999 && SYMBOL_REF_BLOCK (desc
->sym
))
4000 place_block_symbol (desc
->sym
);
4003 switch_to_section (targetm
.asm_out
.select_rtx_section
4004 (desc
->mode
, desc
->constant
, desc
->align
));
4005 output_constant_pool_1 (desc
, desc
->align
);
4010 /* Mark all constants that are used in the current function, then write
4011 out the function's private constant pool. */
4014 output_constant_pool (const char *fnname ATTRIBUTE_UNUSED
,
4015 tree fndecl ATTRIBUTE_UNUSED
)
4017 struct rtx_constant_pool
*pool
= crtl
->varasm
.pool
;
4019 /* It is possible for gcc to call force_const_mem and then to later
4020 discard the instructions which refer to the constant. In such a
4021 case we do not need to output the constant. */
4022 mark_constant_pool ();
4024 #ifdef ASM_OUTPUT_POOL_PROLOGUE
4025 ASM_OUTPUT_POOL_PROLOGUE (asm_out_file
, fnname
, fndecl
, pool
->offset
);
4028 output_constant_pool_contents (pool
);
4030 #ifdef ASM_OUTPUT_POOL_EPILOGUE
4031 ASM_OUTPUT_POOL_EPILOGUE (asm_out_file
, fnname
, fndecl
, pool
->offset
);
4035 /* Write the contents of the shared constant pool. */
4038 output_shared_constant_pool (void)
4040 output_constant_pool_contents (shared_constant_pool
);
4043 /* Determine what kind of relocations EXP may need. */
4046 compute_reloc_for_constant (tree exp
)
4048 int reloc
= 0, reloc2
;
4051 switch (TREE_CODE (exp
))
4055 /* Go inside any operations that get_inner_reference can handle and see
4056 if what's inside is a constant: no need to do anything here for
4057 addresses of variables or functions. */
4058 for (tem
= TREE_OPERAND (exp
, 0); handled_component_p (tem
);
4059 tem
= TREE_OPERAND (tem
, 0))
4062 if (TREE_CODE (tem
) == MEM_REF
4063 && TREE_CODE (TREE_OPERAND (tem
, 0)) == ADDR_EXPR
)
4065 reloc
= compute_reloc_for_constant (TREE_OPERAND (tem
, 0));
4069 if (TREE_PUBLIC (tem
))
4076 case POINTER_PLUS_EXPR
:
4077 reloc
= compute_reloc_for_constant (TREE_OPERAND (exp
, 0));
4078 reloc
|= compute_reloc_for_constant (TREE_OPERAND (exp
, 1));
4082 reloc
= compute_reloc_for_constant (TREE_OPERAND (exp
, 0));
4083 reloc2
= compute_reloc_for_constant (TREE_OPERAND (exp
, 1));
4084 /* The difference of two local labels is computable at link time. */
4085 if (reloc
== 1 && reloc2
== 1)
4092 case VIEW_CONVERT_EXPR
:
4093 reloc
= compute_reloc_for_constant (TREE_OPERAND (exp
, 0));
4098 unsigned HOST_WIDE_INT idx
;
4099 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp
), idx
, tem
)
4101 reloc
|= compute_reloc_for_constant (tem
);
4111 /* Find all the constants whose addresses are referenced inside of EXP,
4112 and make sure assembler code with a label has been output for each one.
4113 Indicate whether an ADDR_EXPR has been encountered. */
4116 output_addressed_constants (tree exp
)
4120 switch (TREE_CODE (exp
))
4124 /* Go inside any operations that get_inner_reference can handle and see
4125 if what's inside is a constant: no need to do anything here for
4126 addresses of variables or functions. */
4127 for (tem
= TREE_OPERAND (exp
, 0); handled_component_p (tem
);
4128 tem
= TREE_OPERAND (tem
, 0))
4131 /* If we have an initialized CONST_DECL, retrieve the initializer. */
4132 if (TREE_CODE (tem
) == CONST_DECL
&& DECL_INITIAL (tem
))
4133 tem
= DECL_INITIAL (tem
);
4135 if (CONSTANT_CLASS_P (tem
) || TREE_CODE (tem
) == CONSTRUCTOR
)
4136 output_constant_def (tem
, 0);
4138 if (TREE_CODE (tem
) == MEM_REF
)
4139 output_addressed_constants (TREE_OPERAND (tem
, 0));
4143 case POINTER_PLUS_EXPR
:
4145 output_addressed_constants (TREE_OPERAND (exp
, 1));
4149 case VIEW_CONVERT_EXPR
:
4150 output_addressed_constants (TREE_OPERAND (exp
, 0));
4155 unsigned HOST_WIDE_INT idx
;
4156 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp
), idx
, tem
)
4158 output_addressed_constants (tem
);
4167 /* Whether a constructor CTOR is a valid static constant initializer if all
4168 its elements are. This used to be internal to initializer_constant_valid_p
4169 and has been exposed to let other functions like categorize_ctor_elements
4170 evaluate the property while walking a constructor for other purposes. */
4173 constructor_static_from_elts_p (const_tree ctor
)
4175 return (TREE_CONSTANT (ctor
)
4176 && (TREE_CODE (TREE_TYPE (ctor
)) == UNION_TYPE
4177 || TREE_CODE (TREE_TYPE (ctor
)) == RECORD_TYPE
4178 || TREE_CODE (TREE_TYPE (ctor
)) == ARRAY_TYPE
));
4181 static tree
initializer_constant_valid_p_1 (tree value
, tree endtype
,
4184 /* A subroutine of initializer_constant_valid_p. VALUE is a MINUS_EXPR,
4185 PLUS_EXPR or POINTER_PLUS_EXPR. This looks for cases of VALUE
4186 which are valid when ENDTYPE is an integer of any size; in
4187 particular, this does not accept a pointer minus a constant. This
4188 returns null_pointer_node if the VALUE is an absolute constant
4189 which can be used to initialize a static variable. Otherwise it
4193 narrowing_initializer_constant_valid_p (tree value
, tree endtype
, tree
*cache
)
4197 if (!INTEGRAL_TYPE_P (endtype
))
4200 op0
= TREE_OPERAND (value
, 0);
4201 op1
= TREE_OPERAND (value
, 1);
4203 /* Like STRIP_NOPS except allow the operand mode to widen. This
4204 works around a feature of fold that simplifies (int)(p1 - p2) to
4205 ((int)p1 - (int)p2) under the theory that the narrower operation
4208 while (CONVERT_EXPR_P (op0
)
4209 || TREE_CODE (op0
) == NON_LVALUE_EXPR
)
4211 tree inner
= TREE_OPERAND (op0
, 0);
4212 if (inner
== error_mark_node
4213 || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner
)))
4214 || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op0
)))
4215 > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner
)))))
4220 while (CONVERT_EXPR_P (op1
)
4221 || TREE_CODE (op1
) == NON_LVALUE_EXPR
)
4223 tree inner
= TREE_OPERAND (op1
, 0);
4224 if (inner
== error_mark_node
4225 || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner
)))
4226 || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op1
)))
4227 > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner
)))))
4232 op0
= initializer_constant_valid_p_1 (op0
, endtype
, cache
);
4236 op1
= initializer_constant_valid_p_1 (op1
, endtype
,
4237 cache
? cache
+ 2 : NULL
);
4238 /* Both initializers must be known. */
4242 && (op0
== null_pointer_node
4243 || TREE_CODE (value
) == MINUS_EXPR
))
4244 return null_pointer_node
;
4246 /* Support differences between labels. */
4247 if (TREE_CODE (op0
) == LABEL_DECL
4248 && TREE_CODE (op1
) == LABEL_DECL
)
4249 return null_pointer_node
;
4251 if (TREE_CODE (op0
) == STRING_CST
4252 && TREE_CODE (op1
) == STRING_CST
4253 && operand_equal_p (op0
, op1
, 1))
4254 return null_pointer_node
;
4260 /* Helper function of initializer_constant_valid_p.
4261 Return nonzero if VALUE is a valid constant-valued expression
4262 for use in initializing a static variable; one that can be an
4263 element of a "constant" initializer.
4265 Return null_pointer_node if the value is absolute;
4266 if it is relocatable, return the variable that determines the relocation.
4267 We assume that VALUE has been folded as much as possible;
4268 therefore, we do not need to check for such things as
4269 arithmetic-combinations of integers.
4271 Use CACHE (pointer to 2 tree values) for caching if non-NULL. */
4274 initializer_constant_valid_p_1 (tree value
, tree endtype
, tree
*cache
)
4278 switch (TREE_CODE (value
))
4281 if (constructor_static_from_elts_p (value
))
4283 unsigned HOST_WIDE_INT idx
;
4285 bool absolute
= true;
4287 if (cache
&& cache
[0] == value
)
4289 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (value
), idx
, elt
)
4292 reloc
= initializer_constant_valid_p_1 (elt
, TREE_TYPE (elt
),
4299 cache
[1] = NULL_TREE
;
4303 if (reloc
!= null_pointer_node
)
4306 /* For a non-absolute relocation, there is no single
4307 variable that can be "the variable that determines the
4312 cache
[1] = absolute
? null_pointer_node
: error_mark_node
;
4314 return absolute
? null_pointer_node
: error_mark_node
;
4317 return TREE_STATIC (value
) ? null_pointer_node
: NULL_TREE
;
4325 return null_pointer_node
;
4330 tree op0
= staticp (TREE_OPERAND (value
, 0));
4333 /* "&(*a).f" is like unto pointer arithmetic. If "a" turns out
4334 to be a constant, this is old-skool offsetof-like nonsense. */
4335 if (TREE_CODE (op0
) == INDIRECT_REF
4336 && TREE_CONSTANT (TREE_OPERAND (op0
, 0)))
4337 return null_pointer_node
;
4338 /* Taking the address of a nested function involves a trampoline,
4339 unless we don't need or want one. */
4340 if (TREE_CODE (op0
) == FUNCTION_DECL
4341 && DECL_STATIC_CHAIN (op0
)
4342 && !TREE_NO_TRAMPOLINE (value
))
4344 /* "&{...}" requires a temporary to hold the constructed
4346 if (TREE_CODE (op0
) == CONSTRUCTOR
)
4352 case NON_LVALUE_EXPR
:
4353 return initializer_constant_valid_p_1 (TREE_OPERAND (value
, 0),
4356 case VIEW_CONVERT_EXPR
:
4358 tree src
= TREE_OPERAND (value
, 0);
4359 tree src_type
= TREE_TYPE (src
);
4360 tree dest_type
= TREE_TYPE (value
);
4362 /* Allow view-conversions from aggregate to non-aggregate type only
4363 if the bit pattern is fully preserved afterwards; otherwise, the
4364 RTL expander won't be able to apply a subsequent transformation
4365 to the underlying constructor. */
4366 if (AGGREGATE_TYPE_P (src_type
) && !AGGREGATE_TYPE_P (dest_type
))
4368 if (TYPE_MODE (endtype
) == TYPE_MODE (dest_type
))
4369 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4374 /* Allow all other kinds of view-conversion. */
4375 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4380 tree src
= TREE_OPERAND (value
, 0);
4381 tree src_type
= TREE_TYPE (src
);
4382 tree dest_type
= TREE_TYPE (value
);
4384 /* Allow conversions between pointer types, floating-point
4385 types, and offset types. */
4386 if ((POINTER_TYPE_P (dest_type
) && POINTER_TYPE_P (src_type
))
4387 || (FLOAT_TYPE_P (dest_type
) && FLOAT_TYPE_P (src_type
))
4388 || (TREE_CODE (dest_type
) == OFFSET_TYPE
4389 && TREE_CODE (src_type
) == OFFSET_TYPE
))
4390 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4392 /* Allow length-preserving conversions between integer types. */
4393 if (INTEGRAL_TYPE_P (dest_type
) && INTEGRAL_TYPE_P (src_type
)
4394 && (TYPE_PRECISION (dest_type
) == TYPE_PRECISION (src_type
)))
4395 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4397 /* Allow conversions between other integer types only if
4399 if (INTEGRAL_TYPE_P (dest_type
) && INTEGRAL_TYPE_P (src_type
))
4401 tree inner
= initializer_constant_valid_p_1 (src
, endtype
, cache
);
4402 if (inner
== null_pointer_node
)
4403 return null_pointer_node
;
4407 /* Allow (int) &foo provided int is as wide as a pointer. */
4408 if (INTEGRAL_TYPE_P (dest_type
) && POINTER_TYPE_P (src_type
)
4409 && (TYPE_PRECISION (dest_type
) >= TYPE_PRECISION (src_type
)))
4410 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4412 /* Likewise conversions from int to pointers, but also allow
4413 conversions from 0. */
4414 if ((POINTER_TYPE_P (dest_type
)
4415 || TREE_CODE (dest_type
) == OFFSET_TYPE
)
4416 && INTEGRAL_TYPE_P (src_type
))
4418 if (TREE_CODE (src
) == INTEGER_CST
4419 && TYPE_PRECISION (dest_type
) >= TYPE_PRECISION (src_type
))
4420 return null_pointer_node
;
4421 if (integer_zerop (src
))
4422 return null_pointer_node
;
4423 else if (TYPE_PRECISION (dest_type
) <= TYPE_PRECISION (src_type
))
4424 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4427 /* Allow conversions to struct or union types if the value
4429 if (TREE_CODE (dest_type
) == RECORD_TYPE
4430 || TREE_CODE (dest_type
) == UNION_TYPE
)
4431 return initializer_constant_valid_p_1 (src
, endtype
, cache
);
4435 case POINTER_PLUS_EXPR
:
4437 /* Any valid floating-point constants will have been folded by now;
4438 with -frounding-math we hit this with addition of two constants. */
4439 if (TREE_CODE (endtype
) == REAL_TYPE
)
4441 if (cache
&& cache
[0] == value
)
4443 if (! INTEGRAL_TYPE_P (endtype
)
4444 || TYPE_PRECISION (endtype
) >= TYPE_PRECISION (TREE_TYPE (value
)))
4446 tree ncache
[4] = { NULL_TREE
, NULL_TREE
, NULL_TREE
, NULL_TREE
};
4448 = initializer_constant_valid_p_1 (TREE_OPERAND (value
, 0),
4451 = initializer_constant_valid_p_1 (TREE_OPERAND (value
, 1),
4452 endtype
, ncache
+ 2);
4453 /* If either term is absolute, use the other term's relocation. */
4454 if (valid0
== null_pointer_node
)
4456 else if (valid1
== null_pointer_node
)
4458 /* Support narrowing pointer differences. */
4460 ret
= narrowing_initializer_constant_valid_p (value
, endtype
,
4464 /* Support narrowing pointer differences. */
4465 ret
= narrowing_initializer_constant_valid_p (value
, endtype
, NULL
);
4474 if (TREE_CODE (endtype
) == REAL_TYPE
)
4476 if (cache
&& cache
[0] == value
)
4478 if (! INTEGRAL_TYPE_P (endtype
)
4479 || TYPE_PRECISION (endtype
) >= TYPE_PRECISION (TREE_TYPE (value
)))
4481 tree ncache
[4] = { NULL_TREE
, NULL_TREE
, NULL_TREE
, NULL_TREE
};
4483 = initializer_constant_valid_p_1 (TREE_OPERAND (value
, 0),
4486 = initializer_constant_valid_p_1 (TREE_OPERAND (value
, 1),
4487 endtype
, ncache
+ 2);
4488 /* Win if second argument is absolute. */
4489 if (valid1
== null_pointer_node
)
4491 /* Win if both arguments have the same relocation.
4492 Then the value is absolute. */
4493 else if (valid0
== valid1
&& valid0
!= 0)
4494 ret
= null_pointer_node
;
4495 /* Since GCC guarantees that string constants are unique in the
4496 generated code, a subtraction between two copies of the same
4497 constant string is absolute. */
4498 else if (valid0
&& TREE_CODE (valid0
) == STRING_CST
4499 && valid1
&& TREE_CODE (valid1
) == STRING_CST
4500 && operand_equal_p (valid0
, valid1
, 1))
4501 ret
= null_pointer_node
;
4502 /* Support narrowing differences. */
4504 ret
= narrowing_initializer_constant_valid_p (value
, endtype
,
4508 /* Support narrowing differences. */
4509 ret
= narrowing_initializer_constant_valid_p (value
, endtype
, NULL
);
4524 /* Return nonzero if VALUE is a valid constant-valued expression
4525 for use in initializing a static variable; one that can be an
4526 element of a "constant" initializer.
4528 Return null_pointer_node if the value is absolute;
4529 if it is relocatable, return the variable that determines the relocation.
4530 We assume that VALUE has been folded as much as possible;
4531 therefore, we do not need to check for such things as
4532 arithmetic-combinations of integers. */
4534 initializer_constant_valid_p (tree value
, tree endtype
)
4536 return initializer_constant_valid_p_1 (value
, endtype
, NULL
);
4539 /* Return true if VALUE is a valid constant-valued expression
4540 for use in initializing a static bit-field; one that can be
4541 an element of a "constant" initializer. */
4544 initializer_constant_valid_for_bitfield_p (tree value
)
4546 /* For bitfields we support integer constants or possibly nested aggregates
4548 switch (TREE_CODE (value
))
4552 unsigned HOST_WIDE_INT idx
;
4555 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (value
), idx
, elt
)
4556 if (!initializer_constant_valid_for_bitfield_p (elt
))
4565 case VIEW_CONVERT_EXPR
:
4566 case NON_LVALUE_EXPR
:
4568 initializer_constant_valid_for_bitfield_p (TREE_OPERAND (value
, 0));
4577 /* output_constructor outer state of relevance in recursive calls, typically
4578 for nested aggregate bitfields. */
4581 unsigned int bit_offset
; /* current position in ... */
4582 int byte
; /* ... the outer byte buffer. */
4585 static unsigned HOST_WIDE_INT
4586 output_constructor (tree
, unsigned HOST_WIDE_INT
, unsigned int,
4589 /* Output assembler code for constant EXP, with no label.
4590 This includes the pseudo-op such as ".int" or ".byte", and a newline.
4591 Assumes output_addressed_constants has been done on EXP already.
4593 Generate exactly SIZE bytes of assembler data, padding at the end
4594 with zeros if necessary. SIZE must always be specified.
4596 SIZE is important for structure constructors,
4597 since trailing members may have been omitted from the constructor.
4598 It is also important for initialization of arrays from string constants
4599 since the full length of the string constant might not be wanted.
4600 It is also needed for initialization of unions, where the initializer's
4601 type is just one member, and that may not be as long as the union.
4603 There a case in which we would fail to output exactly SIZE bytes:
4604 for a structure constructor that wants to produce more than SIZE bytes.
4605 But such constructors will never be generated for any possible input.
4607 ALIGN is the alignment of the data in bits. */
4610 output_constant (tree exp
, unsigned HOST_WIDE_INT size
, unsigned int align
)
4612 enum tree_code code
;
4613 unsigned HOST_WIDE_INT thissize
;
4615 if (size
== 0 || flag_syntax_only
)
4618 /* See if we're trying to initialize a pointer in a non-default mode
4619 to the address of some declaration somewhere. If the target says
4620 the mode is valid for pointers, assume the target has a way of
4622 if (TREE_CODE (exp
) == NOP_EXPR
4623 && POINTER_TYPE_P (TREE_TYPE (exp
))
4624 && targetm
.addr_space
.valid_pointer_mode
4625 (TYPE_MODE (TREE_TYPE (exp
)),
4626 TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp
)))))
4628 tree saved_type
= TREE_TYPE (exp
);
4630 /* Peel off any intermediate conversions-to-pointer for valid
4632 while (TREE_CODE (exp
) == NOP_EXPR
4633 && POINTER_TYPE_P (TREE_TYPE (exp
))
4634 && targetm
.addr_space
.valid_pointer_mode
4635 (TYPE_MODE (TREE_TYPE (exp
)),
4636 TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp
)))))
4637 exp
= TREE_OPERAND (exp
, 0);
4639 /* If what we're left with is the address of something, we can
4640 convert the address to the final type and output it that
4642 if (TREE_CODE (exp
) == ADDR_EXPR
)
4643 exp
= build1 (ADDR_EXPR
, saved_type
, TREE_OPERAND (exp
, 0));
4644 /* Likewise for constant ints. */
4645 else if (TREE_CODE (exp
) == INTEGER_CST
)
4646 exp
= build_int_cst_wide (saved_type
, TREE_INT_CST_LOW (exp
),
4647 TREE_INT_CST_HIGH (exp
));
4651 /* Eliminate any conversions since we'll be outputting the underlying
4653 while (CONVERT_EXPR_P (exp
)
4654 || TREE_CODE (exp
) == NON_LVALUE_EXPR
4655 || TREE_CODE (exp
) == VIEW_CONVERT_EXPR
)
4657 HOST_WIDE_INT type_size
= int_size_in_bytes (TREE_TYPE (exp
));
4658 HOST_WIDE_INT op_size
= int_size_in_bytes (TREE_TYPE (TREE_OPERAND (exp
, 0)));
4660 /* Make sure eliminating the conversion is really a no-op, except with
4661 VIEW_CONVERT_EXPRs to allow for wild Ada unchecked conversions and
4662 union types to allow for Ada unchecked unions. */
4663 if (type_size
> op_size
4664 && TREE_CODE (exp
) != VIEW_CONVERT_EXPR
4665 && TREE_CODE (TREE_TYPE (exp
)) != UNION_TYPE
)
4666 /* Keep the conversion. */
4669 exp
= TREE_OPERAND (exp
, 0);
4672 code
= TREE_CODE (TREE_TYPE (exp
));
4673 thissize
= int_size_in_bytes (TREE_TYPE (exp
));
4675 /* Allow a constructor with no elements for any data type.
4676 This means to fill the space with zeros. */
4677 if (TREE_CODE (exp
) == CONSTRUCTOR
4678 && vec_safe_is_empty (CONSTRUCTOR_ELTS (exp
)))
4680 assemble_zeros (size
);
4684 if (TREE_CODE (exp
) == FDESC_EXPR
)
4686 #ifdef ASM_OUTPUT_FDESC
4687 HOST_WIDE_INT part
= tree_low_cst (TREE_OPERAND (exp
, 1), 0);
4688 tree decl
= TREE_OPERAND (exp
, 0);
4689 ASM_OUTPUT_FDESC (asm_out_file
, decl
, part
);
4696 /* Now output the underlying data. If we've handling the padding, return.
4697 Otherwise, break and ensure SIZE is the size written. */
4704 case REFERENCE_TYPE
:
4706 case FIXED_POINT_TYPE
:
4707 if (! assemble_integer (expand_expr (exp
, NULL_RTX
, VOIDmode
,
4708 EXPAND_INITIALIZER
),
4709 MIN (size
, thissize
), align
, 0))
4710 error ("initializer for integer/fixed-point value is too complicated");
4714 if (TREE_CODE (exp
) != REAL_CST
)
4715 error ("initializer for floating value is not a floating constant");
4717 assemble_real (TREE_REAL_CST (exp
), TYPE_MODE (TREE_TYPE (exp
)), align
);
4721 output_constant (TREE_REALPART (exp
), thissize
/ 2, align
);
4722 output_constant (TREE_IMAGPART (exp
), thissize
/ 2,
4723 min_align (align
, BITS_PER_UNIT
* (thissize
/ 2)));
4728 switch (TREE_CODE (exp
))
4731 output_constructor (exp
, size
, align
, NULL
);
4735 = MIN ((unsigned HOST_WIDE_INT
)TREE_STRING_LENGTH (exp
), size
);
4736 assemble_string (TREE_STRING_POINTER (exp
), thissize
);
4740 enum machine_mode inner
= TYPE_MODE (TREE_TYPE (TREE_TYPE (exp
)));
4741 unsigned int nalign
= MIN (align
, GET_MODE_ALIGNMENT (inner
));
4742 int elt_size
= GET_MODE_SIZE (inner
);
4743 output_constant (VECTOR_CST_ELT (exp
, 0), elt_size
, align
);
4744 thissize
= elt_size
;
4745 for (unsigned int i
= 1; i
< VECTOR_CST_NELTS (exp
); i
++)
4747 output_constant (VECTOR_CST_ELT (exp
, i
), elt_size
, nalign
);
4748 thissize
+= elt_size
;
4759 gcc_assert (TREE_CODE (exp
) == CONSTRUCTOR
);
4760 output_constructor (exp
, size
, align
, NULL
);
4770 if (size
> thissize
)
4771 assemble_zeros (size
- thissize
);
4775 /* Subroutine of output_constructor, used for computing the size of
4776 arrays of unspecified length. VAL must be a CONSTRUCTOR of an array
4777 type with an unspecified upper bound. */
4779 static unsigned HOST_WIDE_INT
4780 array_size_for_constructor (tree val
)
4783 unsigned HOST_WIDE_INT cnt
;
4784 tree index
, value
, tmp
;
4787 /* This code used to attempt to handle string constants that are not
4788 arrays of single-bytes, but nothing else does, so there's no point in
4790 if (TREE_CODE (val
) == STRING_CST
)
4791 return TREE_STRING_LENGTH (val
);
4793 max_index
= NULL_TREE
;
4794 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (val
), cnt
, index
, value
)
4796 if (TREE_CODE (index
) == RANGE_EXPR
)
4797 index
= TREE_OPERAND (index
, 1);
4798 if (max_index
== NULL_TREE
|| tree_int_cst_lt (max_index
, index
))
4802 if (max_index
== NULL_TREE
)
4805 /* Compute the total number of array elements. */
4806 tmp
= TYPE_MIN_VALUE (TYPE_DOMAIN (TREE_TYPE (val
)));
4807 i
= tree_to_double_int (max_index
) - tree_to_double_int (tmp
);
4808 i
+= double_int_one
;
4810 /* Multiply by the array element unit size to find number of bytes. */
4811 i
*= tree_to_double_int (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (val
))));
4813 gcc_assert (i
.fits_uhwi ());
4817 /* Other datastructures + helpers for output_constructor. */
4819 /* output_constructor local state to support interaction with helpers. */
4823 /* Received arguments. */
4824 tree exp
; /* Constructor expression. */
4825 tree type
; /* Type of constructor expression. */
4826 unsigned HOST_WIDE_INT size
; /* # bytes to output - pad if necessary. */
4827 unsigned int align
; /* Known initial alignment. */
4828 tree min_index
; /* Lower bound if specified for an array. */
4830 /* Output processing state. */
4831 HOST_WIDE_INT total_bytes
; /* # bytes output so far / current position. */
4832 int byte
; /* Part of a bitfield byte yet to be output. */
4833 int last_relative_index
; /* Implicit or explicit index of the last
4834 array element output within a bitfield. */
4835 bool byte_buffer_in_use
; /* Whether BYTE is in use. */
4837 /* Current element. */
4838 tree field
; /* Current field decl in a record. */
4839 tree val
; /* Current element value. */
4840 tree index
; /* Current element index. */
4844 /* Helper for output_constructor. From the current LOCAL state, output a
4845 RANGE_EXPR element. */
4848 output_constructor_array_range (oc_local_state
*local
)
4850 unsigned HOST_WIDE_INT fieldsize
4851 = int_size_in_bytes (TREE_TYPE (local
->type
));
4853 HOST_WIDE_INT lo_index
4854 = tree_low_cst (TREE_OPERAND (local
->index
, 0), 0);
4855 HOST_WIDE_INT hi_index
4856 = tree_low_cst (TREE_OPERAND (local
->index
, 1), 0);
4857 HOST_WIDE_INT index
;
4860 = min_align (local
->align
, fieldsize
* BITS_PER_UNIT
);
4862 for (index
= lo_index
; index
<= hi_index
; index
++)
4864 /* Output the element's initial value. */
4865 if (local
->val
== NULL_TREE
)
4866 assemble_zeros (fieldsize
);
4868 output_constant (local
->val
, fieldsize
, align2
);
4870 /* Count its size. */
4871 local
->total_bytes
+= fieldsize
;
4875 /* Helper for output_constructor. From the current LOCAL state, output a
4876 field element that is not true bitfield or part of an outer one. */
4879 output_constructor_regular_field (oc_local_state
*local
)
4881 /* Field size and position. Since this structure is static, we know the
4882 positions are constant. */
4883 unsigned HOST_WIDE_INT fieldsize
;
4884 HOST_WIDE_INT fieldpos
;
4886 unsigned int align2
;
4888 if (local
->index
!= NULL_TREE
)
4890 /* Perform the index calculation in modulo arithmetic but
4891 sign-extend the result because Ada has negative DECL_FIELD_OFFSETs
4892 but we are using an unsigned sizetype. */
4893 unsigned prec
= TYPE_PRECISION (sizetype
);
4894 double_int idx
= tree_to_double_int (local
->index
)
4895 - tree_to_double_int (local
->min_index
);
4896 idx
= idx
.sext (prec
);
4897 fieldpos
= (tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (local
->val
)), 1)
4900 else if (local
->field
!= NULL_TREE
)
4901 fieldpos
= int_byte_position (local
->field
);
4905 /* Output any buffered-up bit-fields preceding this element. */
4906 if (local
->byte_buffer_in_use
)
4908 assemble_integer (GEN_INT (local
->byte
), 1, BITS_PER_UNIT
, 1);
4909 local
->total_bytes
++;
4910 local
->byte_buffer_in_use
= false;
4913 /* Advance to offset of this element.
4914 Note no alignment needed in an array, since that is guaranteed
4915 if each element has the proper size. */
4916 if ((local
->field
!= NULL_TREE
|| local
->index
!= NULL_TREE
)
4917 && fieldpos
!= local
->total_bytes
)
4919 gcc_assert (fieldpos
>= local
->total_bytes
);
4920 assemble_zeros (fieldpos
- local
->total_bytes
);
4921 local
->total_bytes
= fieldpos
;
4924 /* Find the alignment of this element. */
4925 align2
= min_align (local
->align
, BITS_PER_UNIT
* fieldpos
);
4927 /* Determine size this element should occupy. */
4932 /* If this is an array with an unspecified upper bound,
4933 the initializer determines the size. */
4934 /* ??? This ought to only checked if DECL_SIZE_UNIT is NULL,
4935 but we cannot do this until the deprecated support for
4936 initializing zero-length array members is removed. */
4937 if (TREE_CODE (TREE_TYPE (local
->field
)) == ARRAY_TYPE
4938 && TYPE_DOMAIN (TREE_TYPE (local
->field
))
4939 && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (local
->field
))))
4941 fieldsize
= array_size_for_constructor (local
->val
);
4942 /* Given a non-empty initialization, this field had
4944 gcc_assert (!fieldsize
|| !DECL_CHAIN (local
->field
));
4947 fieldsize
= tree_low_cst (DECL_SIZE_UNIT (local
->field
), 1);
4950 fieldsize
= int_size_in_bytes (TREE_TYPE (local
->type
));
4952 /* Output the element's initial value. */
4953 if (local
->val
== NULL_TREE
)
4954 assemble_zeros (fieldsize
);
4956 output_constant (local
->val
, fieldsize
, align2
);
4958 /* Count its size. */
4959 local
->total_bytes
+= fieldsize
;
4962 /* Helper for output_constructor. From the LOCAL state, output an element
4963 that is a true bitfield or part of an outer one. BIT_OFFSET is the offset
4964 from the start of a possibly ongoing outer byte buffer. */
4967 output_constructor_bitfield (oc_local_state
*local
, unsigned int bit_offset
)
4969 /* Bit size of this element. */
4970 HOST_WIDE_INT ebitsize
4972 ? tree_low_cst (DECL_SIZE (local
->field
), 1)
4973 : tree_low_cst (TYPE_SIZE (TREE_TYPE (local
->type
)), 1));
4975 /* Relative index of this element if this is an array component. */
4976 HOST_WIDE_INT relative_index
4979 ? (tree_low_cst (local
->index
, 0)
4980 - tree_low_cst (local
->min_index
, 0))
4981 : local
->last_relative_index
+ 1)
4984 /* Bit position of this element from the start of the containing
4986 HOST_WIDE_INT constructor_relative_ebitpos
4988 ? int_bit_position (local
->field
)
4989 : ebitsize
* relative_index
);
4991 /* Bit position of this element from the start of a possibly ongoing
4992 outer byte buffer. */
4993 HOST_WIDE_INT byte_relative_ebitpos
4994 = bit_offset
+ constructor_relative_ebitpos
;
4996 /* From the start of a possibly ongoing outer byte buffer, offsets to
4997 the first bit of this element and to the first bit past the end of
4999 HOST_WIDE_INT next_offset
= byte_relative_ebitpos
;
5000 HOST_WIDE_INT end_offset
= byte_relative_ebitpos
+ ebitsize
;
5002 local
->last_relative_index
= relative_index
;
5004 if (local
->val
== NULL_TREE
)
5005 local
->val
= integer_zero_node
;
5007 while (TREE_CODE (local
->val
) == VIEW_CONVERT_EXPR
5008 || TREE_CODE (local
->val
) == NON_LVALUE_EXPR
)
5009 local
->val
= TREE_OPERAND (local
->val
, 0);
5011 if (TREE_CODE (local
->val
) != INTEGER_CST
5012 && TREE_CODE (local
->val
) != CONSTRUCTOR
)
5014 error ("invalid initial value for member %qE", DECL_NAME (local
->field
));
5018 /* If this field does not start in this (or next) byte, skip some bytes. */
5019 if (next_offset
/ BITS_PER_UNIT
!= local
->total_bytes
)
5021 /* Output remnant of any bit field in previous bytes. */
5022 if (local
->byte_buffer_in_use
)
5024 assemble_integer (GEN_INT (local
->byte
), 1, BITS_PER_UNIT
, 1);
5025 local
->total_bytes
++;
5026 local
->byte_buffer_in_use
= false;
5029 /* If still not at proper byte, advance to there. */
5030 if (next_offset
/ BITS_PER_UNIT
!= local
->total_bytes
)
5032 gcc_assert (next_offset
/ BITS_PER_UNIT
>= local
->total_bytes
);
5033 assemble_zeros (next_offset
/ BITS_PER_UNIT
- local
->total_bytes
);
5034 local
->total_bytes
= next_offset
/ BITS_PER_UNIT
;
5038 /* Set up the buffer if necessary. */
5039 if (!local
->byte_buffer_in_use
)
5043 local
->byte_buffer_in_use
= true;
5046 /* If this is nested constructor, recurse passing the bit offset and the
5047 pending data, then retrieve the new pending data afterwards. */
5048 if (TREE_CODE (local
->val
) == CONSTRUCTOR
)
5050 oc_outer_state temp_state
;
5051 temp_state
.bit_offset
= next_offset
% BITS_PER_UNIT
;
5052 temp_state
.byte
= local
->byte
;
5054 += output_constructor (local
->val
, 0, 0, &temp_state
);
5055 local
->byte
= temp_state
.byte
;
5059 /* Otherwise, we must split the element into pieces that fall within
5060 separate bytes, and combine each byte with previous or following
5062 while (next_offset
< end_offset
)
5066 HOST_WIDE_INT value
;
5067 HOST_WIDE_INT next_byte
= next_offset
/ BITS_PER_UNIT
;
5068 HOST_WIDE_INT next_bit
= next_offset
% BITS_PER_UNIT
;
5070 /* Advance from byte to byte within this element when necessary. */
5071 while (next_byte
!= local
->total_bytes
)
5073 assemble_integer (GEN_INT (local
->byte
), 1, BITS_PER_UNIT
, 1);
5074 local
->total_bytes
++;
5078 /* Number of bits we can process at once (all part of the same byte). */
5079 this_time
= MIN (end_offset
- next_offset
, BITS_PER_UNIT
- next_bit
);
5080 if (BYTES_BIG_ENDIAN
)
5082 /* On big-endian machine, take the most significant bits
5083 first (of the bits that are significant)
5084 and put them into bytes from the most significant end. */
5085 shift
= end_offset
- next_offset
- this_time
;
5087 /* Don't try to take a bunch of bits that cross
5088 the word boundary in the INTEGER_CST. We can
5089 only select bits from the LOW or HIGH part
5091 if (shift
< HOST_BITS_PER_WIDE_INT
5092 && shift
+ this_time
> HOST_BITS_PER_WIDE_INT
)
5094 this_time
= shift
+ this_time
- HOST_BITS_PER_WIDE_INT
;
5095 shift
= HOST_BITS_PER_WIDE_INT
;
5098 /* Now get the bits from the appropriate constant word. */
5099 if (shift
< HOST_BITS_PER_WIDE_INT
)
5100 value
= TREE_INT_CST_LOW (local
->val
);
5103 gcc_assert (shift
< HOST_BITS_PER_DOUBLE_INT
);
5104 value
= TREE_INT_CST_HIGH (local
->val
);
5105 shift
-= HOST_BITS_PER_WIDE_INT
;
5108 /* Get the result. This works only when:
5109 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */
5110 local
->byte
|= (((value
>> shift
)
5111 & (((HOST_WIDE_INT
) 2 << (this_time
- 1)) - 1))
5112 << (BITS_PER_UNIT
- this_time
- next_bit
));
5116 /* On little-endian machines,
5117 take first the least significant bits of the value
5118 and pack them starting at the least significant
5119 bits of the bytes. */
5120 shift
= next_offset
- byte_relative_ebitpos
;
5122 /* Don't try to take a bunch of bits that cross
5123 the word boundary in the INTEGER_CST. We can
5124 only select bits from the LOW or HIGH part
5126 if (shift
< HOST_BITS_PER_WIDE_INT
5127 && shift
+ this_time
> HOST_BITS_PER_WIDE_INT
)
5128 this_time
= (HOST_BITS_PER_WIDE_INT
- shift
);
5130 /* Now get the bits from the appropriate constant word. */
5131 if (shift
< HOST_BITS_PER_WIDE_INT
)
5132 value
= TREE_INT_CST_LOW (local
->val
);
5135 gcc_assert (shift
< HOST_BITS_PER_DOUBLE_INT
);
5136 value
= TREE_INT_CST_HIGH (local
->val
);
5137 shift
-= HOST_BITS_PER_WIDE_INT
;
5140 /* Get the result. This works only when:
5141 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */
5142 local
->byte
|= (((value
>> shift
)
5143 & (((HOST_WIDE_INT
) 2 << (this_time
- 1)) - 1))
5147 next_offset
+= this_time
;
5148 local
->byte_buffer_in_use
= true;
5152 /* Subroutine of output_constant, used for CONSTRUCTORs (aggregate constants).
5153 Generate at least SIZE bytes, padding if necessary. OUTER designates the
5154 caller output state of relevance in recursive invocations. */
5156 static unsigned HOST_WIDE_INT
5157 output_constructor (tree exp
, unsigned HOST_WIDE_INT size
,
5158 unsigned int align
, oc_outer_state
*outer
)
5160 unsigned HOST_WIDE_INT cnt
;
5161 constructor_elt
*ce
;
5163 oc_local_state local
;
5165 /* Setup our local state to communicate with helpers. */
5167 local
.type
= TREE_TYPE (exp
);
5169 local
.align
= align
;
5170 if (TREE_CODE (local
.type
) == ARRAY_TYPE
&& TYPE_DOMAIN (local
.type
))
5171 local
.min_index
= TYPE_MIN_VALUE (TYPE_DOMAIN (local
.type
));
5173 local
.min_index
= NULL_TREE
;
5175 local
.total_bytes
= 0;
5176 local
.byte_buffer_in_use
= outer
!= NULL
;
5177 local
.byte
= outer
? outer
->byte
: 0;
5178 local
.last_relative_index
= -1;
5180 gcc_assert (HOST_BITS_PER_WIDE_INT
>= BITS_PER_UNIT
);
5182 /* As CE goes through the elements of the constant, FIELD goes through the
5183 structure fields if the constant is a structure. If the constant is a
5184 union, we override this by getting the field from the TREE_LIST element.
5185 But the constant could also be an array. Then FIELD is zero.
5187 There is always a maximum of one element in the chain LINK for unions
5188 (even if the initializer in a source program incorrectly contains
5191 if (TREE_CODE (local
.type
) == RECORD_TYPE
)
5192 local
.field
= TYPE_FIELDS (local
.type
);
5194 local
.field
= NULL_TREE
;
5197 vec_safe_iterate (CONSTRUCTOR_ELTS (exp
), cnt
, &ce
);
5198 cnt
++, local
.field
= local
.field
? DECL_CHAIN (local
.field
) : 0)
5200 local
.val
= ce
->value
;
5201 local
.index
= NULL_TREE
;
5203 /* The element in a union constructor specifies the proper field
5205 if (RECORD_OR_UNION_TYPE_P (local
.type
) && ce
->index
!= NULL_TREE
)
5206 local
.field
= ce
->index
;
5208 else if (TREE_CODE (local
.type
) == ARRAY_TYPE
)
5209 local
.index
= ce
->index
;
5211 if (local
.field
&& flag_verbose_asm
)
5212 fprintf (asm_out_file
, "%s %s:\n",
5214 DECL_NAME (local
.field
)
5215 ? IDENTIFIER_POINTER (DECL_NAME (local
.field
))
5218 /* Eliminate the marker that makes a cast not be an lvalue. */
5219 if (local
.val
!= NULL_TREE
)
5220 STRIP_NOPS (local
.val
);
5222 /* Output the current element, using the appropriate helper ... */
5224 /* For an array slice not part of an outer bitfield. */
5226 && local
.index
!= NULL_TREE
5227 && TREE_CODE (local
.index
) == RANGE_EXPR
)
5228 output_constructor_array_range (&local
);
5230 /* For a field that is neither a true bitfield nor part of an outer one,
5231 known to be at least byte aligned and multiple-of-bytes long. */
5233 && (local
.field
== NULL_TREE
5234 || !CONSTRUCTOR_BITFIELD_P (local
.field
)))
5235 output_constructor_regular_field (&local
);
5237 /* For a true bitfield or part of an outer one. Only INTEGER_CSTs are
5238 supported for scalar fields, so we may need to convert first. */
5241 if (TREE_CODE (local
.val
) == REAL_CST
)
5243 = fold_unary (VIEW_CONVERT_EXPR
,
5244 build_nonstandard_integer_type
5245 (TYPE_PRECISION (TREE_TYPE (local
.val
)), 0),
5247 output_constructor_bitfield (&local
, outer
? outer
->bit_offset
: 0);
5251 /* If we are not at toplevel, save the pending data for our caller.
5252 Otherwise output the pending data and padding zeros as needed. */
5254 outer
->byte
= local
.byte
;
5257 if (local
.byte_buffer_in_use
)
5259 assemble_integer (GEN_INT (local
.byte
), 1, BITS_PER_UNIT
, 1);
5260 local
.total_bytes
++;
5263 if ((unsigned HOST_WIDE_INT
)local
.total_bytes
< local
.size
)
5265 assemble_zeros (local
.size
- local
.total_bytes
);
5266 local
.total_bytes
= local
.size
;
5270 return local
.total_bytes
;
5273 /* Mark DECL as weak. */
5276 mark_weak (tree decl
)
5278 DECL_WEAK (decl
) = 1;
5280 if (DECL_RTL_SET_P (decl
)
5281 && MEM_P (DECL_RTL (decl
))
5282 && XEXP (DECL_RTL (decl
), 0)
5283 && GET_CODE (XEXP (DECL_RTL (decl
), 0)) == SYMBOL_REF
)
5284 SYMBOL_REF_WEAK (XEXP (DECL_RTL (decl
), 0)) = 1;
5287 /* Merge weak status between NEWDECL and OLDDECL. */
5290 merge_weak (tree newdecl
, tree olddecl
)
5292 if (DECL_WEAK (newdecl
) == DECL_WEAK (olddecl
))
5294 if (DECL_WEAK (newdecl
) && TARGET_SUPPORTS_WEAK
)
5297 /* We put the NEWDECL on the weak_decls list at some point
5298 and OLDDECL as well. Keep just OLDDECL on the list. */
5299 for (pwd
= &weak_decls
; *pwd
; pwd
= &TREE_CHAIN (*pwd
))
5300 if (TREE_VALUE (*pwd
) == newdecl
)
5302 *pwd
= TREE_CHAIN (*pwd
);
5309 if (DECL_WEAK (newdecl
))
5313 /* NEWDECL is weak, but OLDDECL is not. */
5315 /* If we already output the OLDDECL, we're in trouble; we can't
5316 go back and make it weak. This should never happen in
5317 unit-at-a-time compilation. */
5318 gcc_assert (!TREE_ASM_WRITTEN (olddecl
));
5320 /* If we've already generated rtl referencing OLDDECL, we may
5321 have done so in a way that will not function properly with
5322 a weak symbol. Again in unit-at-a-time this should be
5324 gcc_assert (!TREE_USED (olddecl
)
5325 || !TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (olddecl
)));
5327 if (TARGET_SUPPORTS_WEAK
)
5329 /* We put the NEWDECL on the weak_decls list at some point.
5330 Replace it with the OLDDECL. */
5331 for (wd
= weak_decls
; wd
; wd
= TREE_CHAIN (wd
))
5332 if (TREE_VALUE (wd
) == newdecl
)
5334 TREE_VALUE (wd
) = olddecl
;
5337 /* We may not find the entry on the list. If NEWDECL is a
5338 weak alias, then we will have already called
5339 globalize_decl to remove the entry; in that case, we do
5340 not need to do anything. */
5343 /* Make the OLDDECL weak; it's OLDDECL that we'll be keeping. */
5344 mark_weak (olddecl
);
5347 /* OLDDECL was weak, but NEWDECL was not explicitly marked as
5348 weak. Just update NEWDECL to indicate that it's weak too. */
5349 mark_weak (newdecl
);
5352 /* Declare DECL to be a weak symbol. */
5355 declare_weak (tree decl
)
5357 gcc_assert (TREE_CODE (decl
) != FUNCTION_DECL
|| !TREE_ASM_WRITTEN (decl
));
5358 if (! TREE_PUBLIC (decl
))
5359 error ("weak declaration of %q+D must be public", decl
);
5360 else if (!TARGET_SUPPORTS_WEAK
)
5361 warning (0, "weak declaration of %q+D not supported", decl
);
5364 if (!lookup_attribute ("weak", DECL_ATTRIBUTES (decl
)))
5365 DECL_ATTRIBUTES (decl
)
5366 = tree_cons (get_identifier ("weak"), NULL
, DECL_ATTRIBUTES (decl
));
5370 weak_finish_1 (tree decl
)
5372 #if defined (ASM_WEAKEN_DECL) || defined (ASM_WEAKEN_LABEL)
5373 const char *const name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
5376 if (! TREE_USED (decl
))
5379 #ifdef ASM_WEAKEN_DECL
5380 ASM_WEAKEN_DECL (asm_out_file
, decl
, name
, NULL
);
5382 #ifdef ASM_WEAKEN_LABEL
5383 ASM_WEAKEN_LABEL (asm_out_file
, name
);
5385 #ifdef ASM_OUTPUT_WEAK_ALIAS
5387 static bool warn_once
= 0;
5390 warning (0, "only weak aliases are supported in this configuration");
5400 /* Fiven an assembly name, find the decl it is associated with. */
5402 find_decl (tree target
)
5404 symtab_node node
= symtab_node_for_asm (target
);
5406 return node
->symbol
.decl
;
5410 /* This TREE_LIST contains weakref targets. */
5412 static GTY(()) tree weakref_targets
;
5414 /* Emit any pending weak declarations. */
5421 for (t
= weakref_targets
; t
; t
= TREE_CHAIN (t
))
5423 tree alias_decl
= TREE_PURPOSE (t
);
5424 tree target
= ultimate_transparent_alias_target (&TREE_VALUE (t
));
5426 if (! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (alias_decl
)))
5427 /* Remove alias_decl from the weak list, but leave entries for
5428 the target alone. */
5430 #ifndef ASM_OUTPUT_WEAKREF
5431 else if (! TREE_SYMBOL_REFERENCED (target
))
5433 /* Use ASM_WEAKEN_LABEL only if ASM_WEAKEN_DECL is not
5434 defined, otherwise we and weak_finish_1 would use
5435 different macros. */
5436 # if defined ASM_WEAKEN_LABEL && ! defined ASM_WEAKEN_DECL
5437 ASM_WEAKEN_LABEL (asm_out_file
, IDENTIFIER_POINTER (target
));
5439 tree decl
= find_decl (target
);
5443 decl
= build_decl (DECL_SOURCE_LOCATION (alias_decl
),
5444 TREE_CODE (alias_decl
), target
,
5445 TREE_TYPE (alias_decl
));
5447 DECL_EXTERNAL (decl
) = 1;
5448 TREE_PUBLIC (decl
) = 1;
5449 DECL_ARTIFICIAL (decl
) = 1;
5450 TREE_NOTHROW (decl
) = TREE_NOTHROW (alias_decl
);
5451 TREE_USED (decl
) = 1;
5454 weak_finish_1 (decl
);
5463 /* Remove the alias and the target from the pending weak list
5464 so that we do not emit any .weak directives for the former,
5465 nor multiple .weak directives for the latter. */
5466 for (p
= &weak_decls
; (t2
= *p
) ; )
5468 if (TREE_VALUE (t2
) == alias_decl
5469 || target
== DECL_ASSEMBLER_NAME (TREE_VALUE (t2
)))
5470 *p
= TREE_CHAIN (t2
);
5472 p
= &TREE_CHAIN (t2
);
5475 /* Remove other weakrefs to the same target, to speed things up. */
5476 for (p
= &TREE_CHAIN (t
); (t2
= *p
) ; )
5478 if (target
== ultimate_transparent_alias_target (&TREE_VALUE (t2
)))
5479 *p
= TREE_CHAIN (t2
);
5481 p
= &TREE_CHAIN (t2
);
5486 for (t
= weak_decls
; t
; t
= TREE_CHAIN (t
))
5488 tree decl
= TREE_VALUE (t
);
5490 weak_finish_1 (decl
);
5494 /* Emit the assembly bits to indicate that DECL is globally visible. */
5497 globalize_decl (tree decl
)
5500 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
5501 if (DECL_WEAK (decl
))
5503 const char *name
= XSTR (XEXP (DECL_RTL (decl
), 0), 0);
5506 #ifdef ASM_WEAKEN_DECL
5507 ASM_WEAKEN_DECL (asm_out_file
, decl
, name
, 0);
5509 ASM_WEAKEN_LABEL (asm_out_file
, name
);
5512 /* Remove this function from the pending weak list so that
5513 we do not emit multiple .weak directives for it. */
5514 for (p
= &weak_decls
; (t
= *p
) ; )
5516 if (DECL_ASSEMBLER_NAME (decl
) == DECL_ASSEMBLER_NAME (TREE_VALUE (t
)))
5517 *p
= TREE_CHAIN (t
);
5519 p
= &TREE_CHAIN (t
);
5522 /* Remove weakrefs to the same target from the pending weakref
5523 list, for the same reason. */
5524 for (p
= &weakref_targets
; (t
= *p
) ; )
5526 if (DECL_ASSEMBLER_NAME (decl
)
5527 == ultimate_transparent_alias_target (&TREE_VALUE (t
)))
5528 *p
= TREE_CHAIN (t
);
5530 p
= &TREE_CHAIN (t
);
5537 targetm
.asm_out
.globalize_decl_name (asm_out_file
, decl
);
5540 vec
<alias_pair
, va_gc
> *alias_pairs
;
5542 /* Output the assembler code for a define (equate) using ASM_OUTPUT_DEF
5543 or ASM_OUTPUT_DEF_FROM_DECLS. The function defines the symbol whose
5544 tree node is DECL to have the value of the tree node TARGET. */
5547 do_assemble_alias (tree decl
, tree target
)
5549 /* Emulated TLS had better not get this var. */
5550 gcc_assert (!(!targetm
.have_tls
5551 && TREE_CODE (decl
) == VAR_DECL
5552 && DECL_THREAD_LOCAL_P (decl
)));
5554 if (TREE_ASM_WRITTEN (decl
))
5557 /* We must force creation of DECL_RTL for debug info generation, even though
5558 we don't use it here. */
5559 make_decl_rtl (decl
);
5561 TREE_ASM_WRITTEN (decl
) = 1;
5562 TREE_ASM_WRITTEN (DECL_ASSEMBLER_NAME (decl
)) = 1;
5564 if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl
)))
5566 ultimate_transparent_alias_target (&target
);
5568 if (!TREE_SYMBOL_REFERENCED (target
))
5569 weakref_targets
= tree_cons (decl
, target
, weakref_targets
);
5571 #ifdef ASM_OUTPUT_WEAKREF
5572 ASM_OUTPUT_WEAKREF (asm_out_file
, decl
,
5573 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
5574 IDENTIFIER_POINTER (target
));
5576 if (!TARGET_SUPPORTS_WEAK
)
5578 error_at (DECL_SOURCE_LOCATION (decl
),
5579 "weakref is not supported in this configuration");
5586 #ifdef ASM_OUTPUT_DEF
5587 /* Make name accessible from other files, if appropriate. */
5589 if (TREE_PUBLIC (decl
))
5591 globalize_decl (decl
);
5592 maybe_assemble_visibility (decl
);
5594 if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (decl
)))
5596 #if defined (ASM_OUTPUT_TYPE_DIRECTIVE)
5597 if (targetm
.has_ifunc_p ())
5598 ASM_OUTPUT_TYPE_DIRECTIVE
5599 (asm_out_file
, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
5603 error_at (DECL_SOURCE_LOCATION (decl
),
5604 "ifunc is not supported on this target");
5607 # ifdef ASM_OUTPUT_DEF_FROM_DECLS
5608 ASM_OUTPUT_DEF_FROM_DECLS (asm_out_file
, decl
, target
);
5610 ASM_OUTPUT_DEF (asm_out_file
,
5611 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
5612 IDENTIFIER_POINTER (target
));
5614 #elif defined (ASM_OUTPUT_WEAK_ALIAS) || defined (ASM_WEAKEN_DECL)
5619 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
5620 # ifdef ASM_WEAKEN_DECL
5621 ASM_WEAKEN_DECL (asm_out_file
, decl
, name
, IDENTIFIER_POINTER (target
));
5623 ASM_OUTPUT_WEAK_ALIAS (asm_out_file
, name
, IDENTIFIER_POINTER (target
));
5625 /* Remove this function from the pending weak list so that
5626 we do not emit multiple .weak directives for it. */
5627 for (p
= &weak_decls
; (t
= *p
) ; )
5628 if (DECL_ASSEMBLER_NAME (decl
) == DECL_ASSEMBLER_NAME (TREE_VALUE (t
)))
5629 *p
= TREE_CHAIN (t
);
5631 p
= &TREE_CHAIN (t
);
5633 /* Remove weakrefs to the same target from the pending weakref
5634 list, for the same reason. */
5635 for (p
= &weakref_targets
; (t
= *p
) ; )
5637 if (DECL_ASSEMBLER_NAME (decl
)
5638 == ultimate_transparent_alias_target (&TREE_VALUE (t
)))
5639 *p
= TREE_CHAIN (t
);
5641 p
= &TREE_CHAIN (t
);
5647 /* Emit an assembler directive to make the symbol for DECL an alias to
5648 the symbol for TARGET. */
5651 assemble_alias (tree decl
, tree target
)
5655 if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl
)))
5657 tree alias
= DECL_ASSEMBLER_NAME (decl
);
5659 ultimate_transparent_alias_target (&target
);
5661 if (alias
== target
)
5662 error ("weakref %q+D ultimately targets itself", decl
);
5663 if (TREE_PUBLIC (decl
))
5664 error ("weakref %q+D must have static linkage", decl
);
5668 #if !defined (ASM_OUTPUT_DEF)
5669 # if !defined(ASM_OUTPUT_WEAK_ALIAS) && !defined (ASM_WEAKEN_DECL)
5670 error_at (DECL_SOURCE_LOCATION (decl
),
5671 "alias definitions not supported in this configuration");
5674 if (!DECL_WEAK (decl
))
5676 if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (decl
)))
5677 error_at (DECL_SOURCE_LOCATION (decl
),
5678 "ifunc is not supported in this configuration");
5680 error_at (DECL_SOURCE_LOCATION (decl
),
5681 "only weak aliases are supported in this configuration");
5687 TREE_USED (decl
) = 1;
5689 /* Allow aliases to aliases. */
5690 if (TREE_CODE (decl
) == FUNCTION_DECL
)
5691 cgraph_get_create_node (decl
)->symbol
.alias
= true;
5693 varpool_node_for_decl (decl
)->symbol
.alias
= true;
5695 /* If the target has already been emitted, we don't have to queue the
5696 alias. This saves a tad of memory. */
5697 if (cgraph_global_info_ready
)
5698 target_decl
= find_decl (target
);
5701 if ((target_decl
&& TREE_ASM_WRITTEN (target_decl
))
5702 || cgraph_state
>= CGRAPH_STATE_EXPANSION
)
5703 do_assemble_alias (decl
, target
);
5706 alias_pair p
= {decl
, target
};
5707 vec_safe_push (alias_pairs
, p
);
5711 /* Record and output a table of translations from original function
5712 to its transaction aware clone. Note that tm_pure functions are
5713 considered to be their own clone. */
5715 static GTY((if_marked ("tree_map_marked_p"), param_is (struct tree_map
)))
5716 htab_t tm_clone_hash
;
5719 record_tm_clone_pair (tree o
, tree n
)
5721 struct tree_map
**slot
, *h
;
5723 if (tm_clone_hash
== NULL
)
5724 tm_clone_hash
= htab_create_ggc (32, tree_map_hash
, tree_map_eq
, 0);
5726 h
= ggc_alloc_tree_map ();
5727 h
->hash
= htab_hash_pointer (o
);
5731 slot
= (struct tree_map
**)
5732 htab_find_slot_with_hash (tm_clone_hash
, h
, h
->hash
, INSERT
);
5737 get_tm_clone_pair (tree o
)
5741 struct tree_map
*h
, in
;
5744 in
.hash
= htab_hash_pointer (o
);
5745 h
= (struct tree_map
*) htab_find_with_hash (tm_clone_hash
,
5753 typedef struct tm_alias_pair
5761 /* Helper function for finish_tm_clone_pairs. Dump a hash table entry
5762 into a VEC in INFO. */
5765 dump_tm_clone_to_vec (void **slot
, void *info
)
5767 struct tree_map
*map
= (struct tree_map
*) *slot
;
5768 vec
<tm_alias_pair
> *tm_alias_pairs
= (vec
<tm_alias_pair
> *) info
;
5769 tm_alias_pair p
= {DECL_UID (map
->base
.from
), map
->base
.from
, map
->to
};
5770 tm_alias_pairs
->safe_push (p
);
5774 /* Dump the actual pairs to the .tm_clone_table section. */
5777 dump_tm_clone_pairs (vec
<tm_alias_pair
> tm_alias_pairs
)
5781 bool switched
= false;
5783 FOR_EACH_VEC_ELT (tm_alias_pairs
, i
, p
)
5787 struct cgraph_node
*src_n
= cgraph_get_node (src
);
5788 struct cgraph_node
*dst_n
= cgraph_get_node (dst
);
5790 /* The function ipa_tm_create_version() marks the clone as needed if
5791 the original function was needed. But we also mark the clone as
5792 needed if we ever called the clone indirectly through
5793 TM_GETTMCLONE. If neither of these are true, we didn't generate
5794 a clone, and we didn't call it indirectly... no sense keeping it
5795 in the clone table. */
5796 if (!dst_n
|| !dst_n
->symbol
.definition
)
5799 /* This covers the case where we have optimized the original
5800 function away, and only access the transactional clone. */
5801 if (!src_n
|| !src_n
->symbol
.definition
)
5806 switch_to_section (targetm
.asm_out
.tm_clone_table_section ());
5807 assemble_align (POINTER_SIZE
);
5811 assemble_integer (XEXP (DECL_RTL (src
), 0),
5812 POINTER_SIZE
/ BITS_PER_UNIT
, POINTER_SIZE
, 1);
5813 assemble_integer (XEXP (DECL_RTL (dst
), 0),
5814 POINTER_SIZE
/ BITS_PER_UNIT
, POINTER_SIZE
, 1);
5818 /* Provide a default for the tm_clone_table section. */
5821 default_clone_table_section (void)
5823 return get_named_section (NULL
, ".tm_clone_table", 3);
5826 /* Helper comparison function for qsorting by the DECL_UID stored in
5827 alias_pair->emitted_diags. */
5830 tm_alias_pair_cmp (const void *x
, const void *y
)
5832 const tm_alias_pair
*p1
= (const tm_alias_pair
*) x
;
5833 const tm_alias_pair
*p2
= (const tm_alias_pair
*) y
;
5834 if (p1
->uid
< p2
->uid
)
5836 if (p1
->uid
> p2
->uid
)
5842 finish_tm_clone_pairs (void)
5844 vec
<tm_alias_pair
> tm_alias_pairs
= vNULL
;
5846 if (tm_clone_hash
== NULL
)
5849 /* We need a determenistic order for the .tm_clone_table, otherwise
5850 we will get bootstrap comparison failures, so dump the hash table
5851 to a vector, sort it, and dump the vector. */
5853 /* Dump the hashtable to a vector. */
5854 htab_traverse_noresize (tm_clone_hash
, dump_tm_clone_to_vec
,
5855 (void *) &tm_alias_pairs
);
5857 tm_alias_pairs
.qsort (tm_alias_pair_cmp
);
5860 dump_tm_clone_pairs (tm_alias_pairs
);
5862 htab_delete (tm_clone_hash
);
5863 tm_clone_hash
= NULL
;
5864 tm_alias_pairs
.release ();
5868 /* Emit an assembler directive to set symbol for DECL visibility to
5869 the visibility type VIS, which must not be VISIBILITY_DEFAULT. */
5872 default_assemble_visibility (tree decl ATTRIBUTE_UNUSED
,
5873 int vis ATTRIBUTE_UNUSED
)
5875 #ifdef HAVE_GAS_HIDDEN
5876 static const char * const visibility_types
[] = {
5877 NULL
, "protected", "hidden", "internal"
5880 const char *name
, *type
;
5882 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
5883 type
= visibility_types
[vis
];
5885 fprintf (asm_out_file
, "\t.%s\t", type
);
5886 assemble_name (asm_out_file
, name
);
5887 fprintf (asm_out_file
, "\n");
5889 if (!DECL_ARTIFICIAL (decl
))
5890 warning (OPT_Wattributes
, "visibility attribute not supported "
5891 "in this configuration; ignored");
5895 /* A helper function to call assemble_visibility when needed for a decl. */
5898 maybe_assemble_visibility (tree decl
)
5900 enum symbol_visibility vis
= DECL_VISIBILITY (decl
);
5902 if (vis
!= VISIBILITY_DEFAULT
)
5904 targetm
.asm_out
.assemble_visibility (decl
, vis
);
5911 /* Returns 1 if the target configuration supports defining public symbols
5912 so that one of them will be chosen at link time instead of generating a
5913 multiply-defined symbol error, whether through the use of weak symbols or
5914 a target-specific mechanism for having duplicates discarded. */
5917 supports_one_only (void)
5919 if (SUPPORTS_ONE_ONLY
)
5921 return TARGET_SUPPORTS_WEAK
;
5924 /* Set up DECL as a public symbol that can be defined in multiple
5925 translation units without generating a linker error. */
5928 make_decl_one_only (tree decl
, tree comdat_group
)
5930 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5931 || TREE_CODE (decl
) == FUNCTION_DECL
);
5933 TREE_PUBLIC (decl
) = 1;
5935 if (SUPPORTS_ONE_ONLY
)
5937 #ifdef MAKE_DECL_ONE_ONLY
5938 MAKE_DECL_ONE_ONLY (decl
);
5940 DECL_COMDAT_GROUP (decl
) = comdat_group
;
5942 else if (TREE_CODE (decl
) == VAR_DECL
5943 && (DECL_INITIAL (decl
) == 0 || DECL_INITIAL (decl
) == error_mark_node
))
5944 DECL_COMMON (decl
) = 1;
5947 gcc_assert (TARGET_SUPPORTS_WEAK
);
5948 DECL_WEAK (decl
) = 1;
5953 init_varasm_once (void)
5955 section_htab
= htab_create_ggc (31, section_entry_hash
,
5956 section_entry_eq
, NULL
);
5957 object_block_htab
= htab_create_ggc (31, object_block_entry_hash
,
5958 object_block_entry_eq
, NULL
);
5959 const_desc_htab
= htab_create_ggc (1009, const_desc_hash
,
5960 const_desc_eq
, NULL
);
5962 const_alias_set
= new_alias_set ();
5963 shared_constant_pool
= create_constant_pool ();
5965 #ifdef TEXT_SECTION_ASM_OP
5966 text_section
= get_unnamed_section (SECTION_CODE
, output_section_asm_op
,
5967 TEXT_SECTION_ASM_OP
);
5970 #ifdef DATA_SECTION_ASM_OP
5971 data_section
= get_unnamed_section (SECTION_WRITE
, output_section_asm_op
,
5972 DATA_SECTION_ASM_OP
);
5975 #ifdef SDATA_SECTION_ASM_OP
5976 sdata_section
= get_unnamed_section (SECTION_WRITE
, output_section_asm_op
,
5977 SDATA_SECTION_ASM_OP
);
5980 #ifdef READONLY_DATA_SECTION_ASM_OP
5981 readonly_data_section
= get_unnamed_section (0, output_section_asm_op
,
5982 READONLY_DATA_SECTION_ASM_OP
);
5985 #ifdef CTORS_SECTION_ASM_OP
5986 ctors_section
= get_unnamed_section (0, output_section_asm_op
,
5987 CTORS_SECTION_ASM_OP
);
5990 #ifdef DTORS_SECTION_ASM_OP
5991 dtors_section
= get_unnamed_section (0, output_section_asm_op
,
5992 DTORS_SECTION_ASM_OP
);
5995 #ifdef BSS_SECTION_ASM_OP
5996 bss_section
= get_unnamed_section (SECTION_WRITE
| SECTION_BSS
,
5997 output_section_asm_op
,
5998 BSS_SECTION_ASM_OP
);
6001 #ifdef SBSS_SECTION_ASM_OP
6002 sbss_section
= get_unnamed_section (SECTION_WRITE
| SECTION_BSS
,
6003 output_section_asm_op
,
6004 SBSS_SECTION_ASM_OP
);
6007 tls_comm_section
= get_noswitch_section (SECTION_WRITE
| SECTION_BSS
6008 | SECTION_COMMON
, emit_tls_common
);
6009 lcomm_section
= get_noswitch_section (SECTION_WRITE
| SECTION_BSS
6010 | SECTION_COMMON
, emit_local
);
6011 comm_section
= get_noswitch_section (SECTION_WRITE
| SECTION_BSS
6012 | SECTION_COMMON
, emit_common
);
6014 #if defined ASM_OUTPUT_ALIGNED_BSS
6015 bss_noswitch_section
= get_noswitch_section (SECTION_WRITE
| SECTION_BSS
,
6019 targetm
.asm_out
.init_sections ();
6021 if (readonly_data_section
== NULL
)
6022 readonly_data_section
= text_section
;
6024 #ifdef ASM_OUTPUT_EXTERNAL
6025 pending_assemble_externals_set
= pointer_set_create ();
6030 decl_default_tls_model (const_tree decl
)
6032 enum tls_model kind
;
6035 is_local
= targetm
.binds_local_p (decl
);
6039 kind
= TLS_MODEL_LOCAL_EXEC
;
6041 kind
= TLS_MODEL_INITIAL_EXEC
;
6044 /* Local dynamic is inefficient when we're not combining the
6045 parts of the address. */
6046 else if (optimize
&& is_local
)
6047 kind
= TLS_MODEL_LOCAL_DYNAMIC
;
6049 kind
= TLS_MODEL_GLOBAL_DYNAMIC
;
6050 if (kind
< flag_tls_default
)
6051 kind
= flag_tls_default
;
6056 /* Select a set of attributes for section NAME based on the properties
6057 of DECL and whether or not RELOC indicates that DECL's initializer
6058 might contain runtime relocations.
6060 We make the section read-only and executable for a function decl,
6061 read-only for a const data decl, and writable for a non-const data decl. */
6064 default_section_type_flags (tree decl
, const char *name
, int reloc
)
6068 if (decl
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6069 flags
= SECTION_CODE
;
6072 enum section_category category
6073 = categorize_decl_for_section (decl
, reloc
);
6074 if (decl_readonly_section_1 (category
))
6076 else if (category
== SECCAT_DATA_REL_RO
6077 || category
== SECCAT_DATA_REL_RO_LOCAL
)
6078 flags
= SECTION_WRITE
| SECTION_RELRO
;
6080 flags
= SECTION_WRITE
;
6084 flags
= SECTION_WRITE
;
6085 if (strcmp (name
, ".data.rel.ro") == 0
6086 || strcmp (name
, ".data.rel.ro.local") == 0)
6087 flags
|= SECTION_RELRO
;
6090 if (decl
&& DECL_P (decl
) && DECL_ONE_ONLY (decl
))
6091 flags
|= SECTION_LINKONCE
;
6093 if (strcmp (name
, ".vtable_map_vars") == 0)
6094 flags
|= SECTION_LINKONCE
;
6096 if (decl
&& TREE_CODE (decl
) == VAR_DECL
&& DECL_THREAD_LOCAL_P (decl
))
6097 flags
|= SECTION_TLS
| SECTION_WRITE
;
6099 if (strcmp (name
, ".bss") == 0
6100 || strncmp (name
, ".bss.", 5) == 0
6101 || strncmp (name
, ".gnu.linkonce.b.", 16) == 0
6102 || strcmp (name
, ".sbss") == 0
6103 || strncmp (name
, ".sbss.", 6) == 0
6104 || strncmp (name
, ".gnu.linkonce.sb.", 17) == 0)
6105 flags
|= SECTION_BSS
;
6107 if (strcmp (name
, ".tdata") == 0
6108 || strncmp (name
, ".tdata.", 7) == 0
6109 || strncmp (name
, ".gnu.linkonce.td.", 17) == 0)
6110 flags
|= SECTION_TLS
;
6112 if (strcmp (name
, ".tbss") == 0
6113 || strncmp (name
, ".tbss.", 6) == 0
6114 || strncmp (name
, ".gnu.linkonce.tb.", 17) == 0)
6115 flags
|= SECTION_TLS
| SECTION_BSS
;
6117 /* These three sections have special ELF types. They are neither
6118 SHT_PROGBITS nor SHT_NOBITS, so when changing sections we don't
6119 want to print a section type (@progbits or @nobits). If someone
6120 is silly enough to emit code or TLS variables to one of these
6121 sections, then don't handle them specially. */
6122 if (!(flags
& (SECTION_CODE
| SECTION_BSS
| SECTION_TLS
))
6123 && (strcmp (name
, ".init_array") == 0
6124 || strcmp (name
, ".fini_array") == 0
6125 || strcmp (name
, ".preinit_array") == 0))
6126 flags
|= SECTION_NOTYPE
;
6131 /* Return true if the target supports some form of global BSS,
6132 either through bss_noswitch_section, or by selecting a BSS
6133 section in TARGET_ASM_SELECT_SECTION. */
6136 have_global_bss_p (void)
6138 return bss_noswitch_section
|| targetm
.have_switchable_bss_sections
;
6141 /* Output assembly to switch to section NAME with attribute FLAGS.
6142 Four variants for common object file formats. */
6145 default_no_named_section (const char *name ATTRIBUTE_UNUSED
,
6146 unsigned int flags ATTRIBUTE_UNUSED
,
6147 tree decl ATTRIBUTE_UNUSED
)
6149 /* Some object formats don't support named sections at all. The
6150 front-end should already have flagged this as an error. */
6154 #ifndef TLS_SECTION_ASM_FLAG
6155 #define TLS_SECTION_ASM_FLAG 'T'
6159 default_elf_asm_named_section (const char *name
, unsigned int flags
,
6160 tree decl ATTRIBUTE_UNUSED
)
6162 char flagchars
[10], *f
= flagchars
;
6164 /* If we have already declared this section, we can use an
6165 abbreviated form to switch back to it -- unless this section is
6166 part of a COMDAT groups, in which case GAS requires the full
6167 declaration every time. */
6168 if (!(HAVE_COMDAT_GROUP
&& (flags
& SECTION_LINKONCE
))
6169 && (flags
& SECTION_DECLARED
))
6171 fprintf (asm_out_file
, "\t.section\t%s\n", name
);
6175 if (!(flags
& SECTION_DEBUG
))
6177 if (flags
& SECTION_EXCLUDE
)
6179 if (flags
& SECTION_WRITE
)
6181 if (flags
& SECTION_CODE
)
6183 if (flags
& SECTION_SMALL
)
6185 if (flags
& SECTION_MERGE
)
6187 if (flags
& SECTION_STRINGS
)
6189 if (flags
& SECTION_TLS
)
6190 *f
++ = TLS_SECTION_ASM_FLAG
;
6191 if (HAVE_COMDAT_GROUP
&& (flags
& SECTION_LINKONCE
))
6195 fprintf (asm_out_file
, "\t.section\t%s,\"%s\"", name
, flagchars
);
6197 if (!(flags
& SECTION_NOTYPE
))
6202 if (flags
& SECTION_BSS
)
6208 /* On platforms that use "@" as the assembly comment character,
6210 if (strcmp (ASM_COMMENT_START
, "@") == 0)
6212 fprintf (asm_out_file
, format
, type
);
6214 if (flags
& SECTION_ENTSIZE
)
6215 fprintf (asm_out_file
, ",%d", flags
& SECTION_ENTSIZE
);
6216 if (HAVE_COMDAT_GROUP
&& (flags
& SECTION_LINKONCE
))
6218 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
6219 fprintf (asm_out_file
, ",%s,comdat", IDENTIFIER_POINTER (decl
));
6221 fprintf (asm_out_file
, ",%s,comdat",
6222 IDENTIFIER_POINTER (DECL_COMDAT_GROUP (decl
)));
6226 putc ('\n', asm_out_file
);
6230 default_coff_asm_named_section (const char *name
, unsigned int flags
,
6231 tree decl ATTRIBUTE_UNUSED
)
6233 char flagchars
[8], *f
= flagchars
;
6235 if (flags
& SECTION_WRITE
)
6237 if (flags
& SECTION_CODE
)
6241 fprintf (asm_out_file
, "\t.section\t%s,\"%s\"\n", name
, flagchars
);
6245 default_pe_asm_named_section (const char *name
, unsigned int flags
,
6248 default_coff_asm_named_section (name
, flags
, decl
);
6250 if (flags
& SECTION_LINKONCE
)
6252 /* Functions may have been compiled at various levels of
6253 optimization so we can't use `same_size' here.
6254 Instead, have the linker pick one. */
6255 fprintf (asm_out_file
, "\t.linkonce %s\n",
6256 (flags
& SECTION_CODE
? "discard" : "same_size"));
6260 /* The lame default section selector. */
6263 default_select_section (tree decl
, int reloc
,
6264 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
)
6268 if (decl_readonly_section (decl
, reloc
))
6269 return readonly_data_section
;
6271 else if (TREE_CODE (decl
) == CONSTRUCTOR
)
6273 if (! ((flag_pic
&& reloc
)
6274 || !TREE_READONLY (decl
)
6275 || TREE_SIDE_EFFECTS (decl
)
6276 || !TREE_CONSTANT (decl
)))
6277 return readonly_data_section
;
6279 else if (TREE_CODE (decl
) == STRING_CST
)
6280 return readonly_data_section
;
6281 else if (! (flag_pic
&& reloc
))
6282 return readonly_data_section
;
6284 return data_section
;
6287 enum section_category
6288 categorize_decl_for_section (const_tree decl
, int reloc
)
6290 enum section_category ret
;
6292 if (TREE_CODE (decl
) == FUNCTION_DECL
)
6294 else if (TREE_CODE (decl
) == STRING_CST
)
6297 || ((flag_sanitize
& SANITIZE_ADDRESS
)
6298 && asan_protect_global (CONST_CAST_TREE (decl
))))
6299 /* or !flag_merge_constants */
6300 return SECCAT_RODATA
;
6302 return SECCAT_RODATA_MERGE_STR
;
6304 else if (TREE_CODE (decl
) == VAR_DECL
)
6306 if (bss_initializer_p (decl
))
6308 else if (! TREE_READONLY (decl
)
6309 || TREE_SIDE_EFFECTS (decl
)
6310 || ! TREE_CONSTANT (DECL_INITIAL (decl
)))
6312 /* Here the reloc_rw_mask is not testing whether the section should
6313 be read-only or not, but whether the dynamic link will have to
6314 do something. If so, we wish to segregate the data in order to
6315 minimize cache misses inside the dynamic linker. */
6316 if (reloc
& targetm
.asm_out
.reloc_rw_mask ())
6317 ret
= reloc
== 1 ? SECCAT_DATA_REL_LOCAL
: SECCAT_DATA_REL
;
6321 else if (reloc
& targetm
.asm_out
.reloc_rw_mask ())
6322 ret
= reloc
== 1 ? SECCAT_DATA_REL_RO_LOCAL
: SECCAT_DATA_REL_RO
;
6323 else if (reloc
|| flag_merge_constants
< 2 || flag_mudflap
6324 || ((flag_sanitize
& SANITIZE_ADDRESS
)
6325 && asan_protect_global (CONST_CAST_TREE (decl
))))
6326 /* C and C++ don't allow different variables to share the same
6327 location. -fmerge-all-constants allows even that (at the
6328 expense of not conforming). */
6329 ret
= SECCAT_RODATA
;
6330 else if (TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
)
6331 ret
= SECCAT_RODATA_MERGE_STR_INIT
;
6333 ret
= SECCAT_RODATA_MERGE_CONST
;
6335 else if (TREE_CODE (decl
) == CONSTRUCTOR
)
6337 if ((reloc
& targetm
.asm_out
.reloc_rw_mask ())
6338 || TREE_SIDE_EFFECTS (decl
)
6339 || ! TREE_CONSTANT (decl
))
6342 ret
= SECCAT_RODATA
;
6345 ret
= SECCAT_RODATA
;
6347 /* There are no read-only thread-local sections. */
6348 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_THREAD_LOCAL_P (decl
))
6350 /* Note that this would be *just* SECCAT_BSS, except that there's
6351 no concept of a read-only thread-local-data section. */
6352 if (ret
== SECCAT_BSS
6353 || (flag_zero_initialized_in_bss
6354 && initializer_zerop (DECL_INITIAL (decl
))))
6360 /* If the target uses small data sections, select it. */
6361 else if (targetm
.in_small_data_p (decl
))
6363 if (ret
== SECCAT_BSS
)
6365 else if (targetm
.have_srodata_section
&& ret
== SECCAT_RODATA
)
6366 ret
= SECCAT_SRODATA
;
6375 decl_readonly_section_1 (enum section_category category
)
6380 case SECCAT_RODATA_MERGE_STR
:
6381 case SECCAT_RODATA_MERGE_STR_INIT
:
6382 case SECCAT_RODATA_MERGE_CONST
:
6383 case SECCAT_SRODATA
:
6391 decl_readonly_section (const_tree decl
, int reloc
)
6393 return decl_readonly_section_1 (categorize_decl_for_section (decl
, reloc
));
6396 /* Select a section based on the above categorization. */
6399 default_elf_select_section (tree decl
, int reloc
,
6400 unsigned HOST_WIDE_INT align
)
6403 switch (categorize_decl_for_section (decl
, reloc
))
6406 /* We're not supposed to be called on FUNCTION_DECLs. */
6409 return readonly_data_section
;
6410 case SECCAT_RODATA_MERGE_STR
:
6411 return mergeable_string_section (decl
, align
, 0);
6412 case SECCAT_RODATA_MERGE_STR_INIT
:
6413 return mergeable_string_section (DECL_INITIAL (decl
), align
, 0);
6414 case SECCAT_RODATA_MERGE_CONST
:
6415 return mergeable_constant_section (DECL_MODE (decl
), align
, 0);
6416 case SECCAT_SRODATA
:
6420 return data_section
;
6421 case SECCAT_DATA_REL
:
6422 sname
= ".data.rel";
6424 case SECCAT_DATA_REL_LOCAL
:
6425 sname
= ".data.rel.local";
6427 case SECCAT_DATA_REL_RO
:
6428 sname
= ".data.rel.ro";
6430 case SECCAT_DATA_REL_RO_LOCAL
:
6431 sname
= ".data.rel.ro.local";
6454 return get_named_section (decl
, sname
, reloc
);
6457 /* Construct a unique section name based on the decl name and the
6458 categorization performed above. */
6461 default_unique_section (tree decl
, int reloc
)
6463 /* We only need to use .gnu.linkonce if we don't have COMDAT groups. */
6464 bool one_only
= DECL_ONE_ONLY (decl
) && !HAVE_COMDAT_GROUP
;
6465 const char *prefix
, *name
, *linkonce
;
6468 switch (categorize_decl_for_section (decl
, reloc
))
6471 prefix
= one_only
? ".t" : ".text";
6474 case SECCAT_RODATA_MERGE_STR
:
6475 case SECCAT_RODATA_MERGE_STR_INIT
:
6476 case SECCAT_RODATA_MERGE_CONST
:
6477 prefix
= one_only
? ".r" : ".rodata";
6479 case SECCAT_SRODATA
:
6480 prefix
= one_only
? ".s2" : ".sdata2";
6483 prefix
= one_only
? ".d" : ".data";
6485 case SECCAT_DATA_REL
:
6486 prefix
= one_only
? ".d.rel" : ".data.rel";
6488 case SECCAT_DATA_REL_LOCAL
:
6489 prefix
= one_only
? ".d.rel.local" : ".data.rel.local";
6491 case SECCAT_DATA_REL_RO
:
6492 prefix
= one_only
? ".d.rel.ro" : ".data.rel.ro";
6494 case SECCAT_DATA_REL_RO_LOCAL
:
6495 prefix
= one_only
? ".d.rel.ro.local" : ".data.rel.ro.local";
6498 prefix
= one_only
? ".s" : ".sdata";
6501 prefix
= one_only
? ".b" : ".bss";
6504 prefix
= one_only
? ".sb" : ".sbss";
6507 prefix
= one_only
? ".td" : ".tdata";
6510 prefix
= one_only
? ".tb" : ".tbss";
6516 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
6517 name
= targetm
.strip_name_encoding (name
);
6519 /* If we're using one_only, then there needs to be a .gnu.linkonce
6520 prefix to the section name. */
6521 linkonce
= one_only
? ".gnu.linkonce" : "";
6523 string
= ACONCAT ((linkonce
, prefix
, ".", name
, NULL
));
6525 DECL_SECTION_NAME (decl
) = build_string (strlen (string
), string
);
6528 /* Like compute_reloc_for_constant, except for an RTX. The return value
6529 is a mask for which bit 1 indicates a global relocation, and bit 0
6530 indicates a local relocation. */
6533 compute_reloc_for_rtx_1 (rtx
*xp
, void *data
)
6535 int *preloc
= (int *) data
;
6538 switch (GET_CODE (x
))
6541 *preloc
|= SYMBOL_REF_LOCAL_P (x
) ? 1 : 2;
6554 compute_reloc_for_rtx (rtx x
)
6558 switch (GET_CODE (x
))
6564 for_each_rtx (&x
, compute_reloc_for_rtx_1
, &reloc
);
6573 default_select_rtx_section (enum machine_mode mode ATTRIBUTE_UNUSED
,
6575 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
)
6577 if (compute_reloc_for_rtx (x
) & targetm
.asm_out
.reloc_rw_mask ())
6578 return data_section
;
6580 return readonly_data_section
;
6584 default_elf_select_rtx_section (enum machine_mode mode
, rtx x
,
6585 unsigned HOST_WIDE_INT align
)
6587 int reloc
= compute_reloc_for_rtx (x
);
6589 /* ??? Handle small data here somehow. */
6591 if (reloc
& targetm
.asm_out
.reloc_rw_mask ())
6594 return get_named_section (NULL
, ".data.rel.ro.local", 1);
6596 return get_named_section (NULL
, ".data.rel.ro", 3);
6599 return mergeable_constant_section (mode
, align
, 0);
6602 /* Set the generally applicable flags on the SYMBOL_REF for EXP. */
6605 default_encode_section_info (tree decl
, rtx rtl
, int first ATTRIBUTE_UNUSED
)
6610 /* Careful not to prod global register variables. */
6613 symbol
= XEXP (rtl
, 0);
6614 if (GET_CODE (symbol
) != SYMBOL_REF
)
6617 flags
= SYMBOL_REF_FLAGS (symbol
) & SYMBOL_FLAG_HAS_BLOCK_INFO
;
6618 if (TREE_CODE (decl
) == FUNCTION_DECL
)
6619 flags
|= SYMBOL_FLAG_FUNCTION
;
6620 if (targetm
.binds_local_p (decl
))
6621 flags
|= SYMBOL_FLAG_LOCAL
;
6622 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_THREAD_LOCAL_P (decl
))
6623 flags
|= DECL_TLS_MODEL (decl
) << SYMBOL_FLAG_TLS_SHIFT
;
6624 else if (targetm
.in_small_data_p (decl
))
6625 flags
|= SYMBOL_FLAG_SMALL
;
6626 /* ??? Why is DECL_EXTERNAL ever set for non-PUBLIC names? Without
6627 being PUBLIC, the thing *must* be defined in this translation unit.
6628 Prevent this buglet from being propagated into rtl code as well. */
6629 if (DECL_P (decl
) && DECL_EXTERNAL (decl
) && TREE_PUBLIC (decl
))
6630 flags
|= SYMBOL_FLAG_EXTERNAL
;
6632 SYMBOL_REF_FLAGS (symbol
) = flags
;
6635 /* By default, we do nothing for encode_section_info, so we need not
6636 do anything but discard the '*' marker. */
6639 default_strip_name_encoding (const char *str
)
6641 return str
+ (*str
== '*');
6644 #ifdef ASM_OUTPUT_DEF
6645 /* The default implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the
6646 anchor relative to ".", the current section position. */
6649 default_asm_output_anchor (rtx symbol
)
6653 sprintf (buffer
, "*. + " HOST_WIDE_INT_PRINT_DEC
,
6654 SYMBOL_REF_BLOCK_OFFSET (symbol
));
6655 ASM_OUTPUT_DEF (asm_out_file
, XSTR (symbol
, 0), buffer
);
6659 /* The default implementation of TARGET_USE_ANCHORS_FOR_SYMBOL_P. */
6662 default_use_anchors_for_symbol_p (const_rtx symbol
)
6667 /* Don't use anchors for mergeable sections. The linker might move
6668 the objects around. */
6669 sect
= SYMBOL_REF_BLOCK (symbol
)->sect
;
6670 if (sect
->common
.flags
& SECTION_MERGE
)
6673 /* Don't use anchors for small data sections. The small data register
6674 acts as an anchor for such sections. */
6675 if (sect
->common
.flags
& SECTION_SMALL
)
6678 decl
= SYMBOL_REF_DECL (symbol
);
6679 if (decl
&& DECL_P (decl
))
6681 /* Don't use section anchors for decls that might be defined or
6682 usurped by other modules. */
6683 if (TREE_PUBLIC (decl
) && !decl_binds_to_current_def_p (decl
))
6686 /* Don't use section anchors for decls that will be placed in a
6687 small data section. */
6688 /* ??? Ideally, this check would be redundant with the SECTION_SMALL
6689 one above. The problem is that we only use SECTION_SMALL for
6690 sections that should be marked as small in the section directive. */
6691 if (targetm
.in_small_data_p (decl
))
6697 /* Return true when RESOLUTION indicate that symbol will be bound to the
6698 definition provided by current .o file. */
6701 resolution_to_local_definition_p (enum ld_plugin_symbol_resolution resolution
)
6703 return (resolution
== LDPR_PREVAILING_DEF
6704 || resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
6705 || resolution
== LDPR_PREVAILING_DEF_IRONLY
);
6708 /* Return true when RESOLUTION indicate that symbol will be bound locally
6709 within current executable or DSO. */
6712 resolution_local_p (enum ld_plugin_symbol_resolution resolution
)
6714 return (resolution
== LDPR_PREVAILING_DEF
6715 || resolution
== LDPR_PREVAILING_DEF_IRONLY
6716 || resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
6717 || resolution
== LDPR_PREEMPTED_REG
6718 || resolution
== LDPR_PREEMPTED_IR
6719 || resolution
== LDPR_RESOLVED_IR
6720 || resolution
== LDPR_RESOLVED_EXEC
);
6723 /* Assume ELF-ish defaults, since that's pretty much the most liberal
6724 wrt cross-module name binding. */
6727 default_binds_local_p (const_tree exp
)
6729 return default_binds_local_p_1 (exp
, flag_shlib
);
6733 default_binds_local_p_1 (const_tree exp
, int shlib
)
6736 bool resolved_locally
= false;
6737 bool resolved_to_local_def
= false;
6739 /* With resolution file in hands, take look into resolutions.
6740 We can't just return true for resolved_locally symbols,
6741 because dynamic linking might overwrite symbols
6742 in shared libraries. */
6743 if (TREE_CODE (exp
) == VAR_DECL
&& TREE_PUBLIC (exp
)
6744 && (TREE_STATIC (exp
) || DECL_EXTERNAL (exp
)))
6746 struct varpool_node
*vnode
= varpool_get_node (exp
);
6747 if (vnode
&& resolution_local_p (vnode
->symbol
.resolution
))
6748 resolved_locally
= true;
6750 && resolution_to_local_definition_p (vnode
->symbol
.resolution
))
6751 resolved_to_local_def
= true;
6753 else if (TREE_CODE (exp
) == FUNCTION_DECL
&& TREE_PUBLIC (exp
))
6755 struct cgraph_node
*node
= cgraph_get_node (exp
);
6757 && resolution_local_p (node
->symbol
.resolution
))
6758 resolved_locally
= true;
6760 && resolution_to_local_definition_p (node
->symbol
.resolution
))
6761 resolved_to_local_def
= true;
6764 /* A non-decl is an entry in the constant pool. */
6767 /* Weakrefs may not bind locally, even though the weakref itself is always
6768 static and therefore local. Similarly, the resolver for ifunc functions
6769 might resolve to a non-local function.
6770 FIXME: We can resolve the weakref case more curefuly by looking at the
6772 else if (lookup_attribute ("weakref", DECL_ATTRIBUTES (exp
))
6773 || (TREE_CODE (exp
) == FUNCTION_DECL
6774 && lookup_attribute ("ifunc", DECL_ATTRIBUTES (exp
))))
6776 /* Static variables are always local. */
6777 else if (! TREE_PUBLIC (exp
))
6779 /* A variable is local if the user has said explicitly that it will
6781 else if ((DECL_VISIBILITY_SPECIFIED (exp
)
6782 || resolved_to_local_def
)
6783 && DECL_VISIBILITY (exp
) != VISIBILITY_DEFAULT
)
6785 /* Variables defined outside this object might not be local. */
6786 else if (DECL_EXTERNAL (exp
) && !resolved_locally
)
6788 /* If defined in this object and visibility is not default, must be
6790 else if (DECL_VISIBILITY (exp
) != VISIBILITY_DEFAULT
)
6792 /* Default visibility weak data can be overridden by a strong symbol
6793 in another module and so are not local. */
6794 else if (DECL_WEAK (exp
)
6795 && !resolved_locally
)
6797 /* If PIC, then assume that any global name can be overridden by
6798 symbols resolved from other modules. */
6801 /* Uninitialized COMMON variable may be unified with symbols
6802 resolved from other modules. */
6803 else if (DECL_COMMON (exp
)
6804 && !resolved_locally
6805 && (DECL_INITIAL (exp
) == NULL
6806 || DECL_INITIAL (exp
) == error_mark_node
))
6808 /* Otherwise we're left with initialized (or non-common) global data
6809 which is of necessity defined locally. */
6816 /* Return true when references to DECL must bind to current definition in
6819 The condition is usually equivalent to whether the function binds to the
6820 current module (shared library or executable), that is to binds_local_p.
6821 We use this fact to avoid need for another target hook and implement
6822 the logic using binds_local_p and just special cases where
6823 decl_binds_to_current_def_p is stronger than binds_local_p. In particular
6824 the weak definitions (that can be overwritten at linktime by other
6825 definition from different object file) and when resolution info is available
6826 we simply use the knowledge passed to us by linker plugin. */
6828 decl_binds_to_current_def_p (tree decl
)
6830 gcc_assert (DECL_P (decl
));
6831 if (!targetm
.binds_local_p (decl
))
6833 if (!TREE_PUBLIC (decl
))
6835 /* When resolution is available, just use it. */
6836 if (TREE_CODE (decl
) == VAR_DECL
6837 && (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)))
6839 struct varpool_node
*vnode
= varpool_get_node (decl
);
6841 && vnode
->symbol
.resolution
!= LDPR_UNKNOWN
)
6842 return resolution_to_local_definition_p (vnode
->symbol
.resolution
);
6844 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6846 struct cgraph_node
*node
= cgraph_get_node (decl
);
6848 && node
->symbol
.resolution
!= LDPR_UNKNOWN
)
6849 return resolution_to_local_definition_p (node
->symbol
.resolution
);
6851 /* Otherwise we have to assume the worst for DECL_WEAK (hidden weaks
6852 binds locally but still can be overwritten), DECL_COMMON (can be merged
6853 with a non-common definition somewhere in the same module) or
6855 This rely on fact that binds_local_p behave as decl_replaceable_p
6856 for all other declaration types. */
6857 if (DECL_WEAK (decl
))
6859 if (DECL_COMMON (decl
)
6860 && (DECL_INITIAL (decl
) == NULL
6861 || DECL_INITIAL (decl
) == error_mark_node
))
6863 if (DECL_EXTERNAL (decl
))
6868 /* A replaceable function or variable is one which may be replaced
6869 at link-time with an entirely different definition, provided that the
6870 replacement has the same type. For example, functions declared
6871 with __attribute__((weak)) on most systems are replaceable.
6873 COMDAT functions are not replaceable, since all definitions of the
6874 function must be equivalent. It is important that COMDAT functions
6875 not be treated as replaceable so that use of C++ template
6876 instantiations is not penalized. */
6879 decl_replaceable_p (tree decl
)
6881 gcc_assert (DECL_P (decl
));
6882 if (!TREE_PUBLIC (decl
) || DECL_COMDAT (decl
))
6884 return !decl_binds_to_current_def_p (decl
);
6887 /* Default function to output code that will globalize a label. A
6888 target must define GLOBAL_ASM_OP or provide its own function to
6889 globalize a label. */
6890 #ifdef GLOBAL_ASM_OP
6892 default_globalize_label (FILE * stream
, const char *name
)
6894 fputs (GLOBAL_ASM_OP
, stream
);
6895 assemble_name (stream
, name
);
6896 putc ('\n', stream
);
6898 #endif /* GLOBAL_ASM_OP */
6900 /* Default function to output code that will globalize a declaration. */
6902 default_globalize_decl_name (FILE * stream
, tree decl
)
6904 const char *name
= XSTR (XEXP (DECL_RTL (decl
), 0), 0);
6905 targetm
.asm_out
.globalize_label (stream
, name
);
6908 /* Default function to output a label for unwind information. The
6909 default is to do nothing. A target that needs nonlocal labels for
6910 unwind information must provide its own function to do this. */
6912 default_emit_unwind_label (FILE * stream ATTRIBUTE_UNUSED
,
6913 tree decl ATTRIBUTE_UNUSED
,
6914 int for_eh ATTRIBUTE_UNUSED
,
6915 int empty ATTRIBUTE_UNUSED
)
6919 /* Default function to output a label to divide up the exception table.
6920 The default is to do nothing. A target that needs/wants to divide
6921 up the table must provide it's own function to do this. */
6923 default_emit_except_table_label (FILE * stream ATTRIBUTE_UNUSED
)
6927 /* This is how to output an internal numbered label where PREFIX is
6928 the class of label and LABELNO is the number within the class. */
6931 default_generate_internal_label (char *buf
, const char *prefix
,
6932 unsigned long labelno
)
6934 ASM_GENERATE_INTERNAL_LABEL (buf
, prefix
, labelno
);
6937 /* This is how to output an internal numbered label where PREFIX is
6938 the class of label and LABELNO is the number within the class. */
6941 default_internal_label (FILE *stream
, const char *prefix
,
6942 unsigned long labelno
)
6944 char *const buf
= (char *) alloca (40 + strlen (prefix
));
6945 ASM_GENERATE_INTERNAL_LABEL (buf
, prefix
, labelno
);
6946 ASM_OUTPUT_INTERNAL_LABEL (stream
, buf
);
6950 /* The default implementation of ASM_DECLARE_CONSTANT_NAME. */
6953 default_asm_declare_constant_name (FILE *file
, const char *name
,
6954 const_tree exp ATTRIBUTE_UNUSED
,
6955 HOST_WIDE_INT size ATTRIBUTE_UNUSED
)
6957 assemble_label (file
, name
);
6960 /* This is the default behavior at the beginning of a file. It's
6961 controlled by two other target-hook toggles. */
6963 default_file_start (void)
6965 if (targetm
.asm_file_start_app_off
6966 && !(flag_verbose_asm
|| flag_debug_asm
|| flag_dump_rtl_in_asm
))
6967 fputs (ASM_APP_OFF
, asm_out_file
);
6969 if (targetm
.asm_file_start_file_directive
)
6970 output_file_directive (asm_out_file
, main_input_filename
);
6973 /* This is a generic routine suitable for use as TARGET_ASM_FILE_END
6974 which emits a special section directive used to indicate whether or
6975 not this object file needs an executable stack. This is primarily
6976 a GNU extension to ELF but could be used on other targets. */
6978 int trampolines_created
;
6981 file_end_indicate_exec_stack (void)
6983 unsigned int flags
= SECTION_DEBUG
;
6984 if (trampolines_created
)
6985 flags
|= SECTION_CODE
;
6987 switch_to_section (get_section (".note.GNU-stack", flags
, NULL
));
6990 /* Emit a special section directive to indicate that this object file
6991 was compiled with -fsplit-stack. This is used to let the linker
6992 detect calls between split-stack code and non-split-stack code, so
6993 that it can modify the split-stack code to allocate a sufficiently
6994 large stack. We emit another special section if there are any
6995 functions in this file which have the no_split_stack attribute, to
6996 prevent the linker from warning about being unable to convert the
6997 functions if they call non-split-stack code. */
7000 file_end_indicate_split_stack (void)
7002 if (flag_split_stack
)
7004 switch_to_section (get_section (".note.GNU-split-stack", SECTION_DEBUG
,
7006 if (saw_no_split_stack
)
7007 switch_to_section (get_section (".note.GNU-no-split-stack",
7008 SECTION_DEBUG
, NULL
));
7012 /* Output DIRECTIVE (a C string) followed by a newline. This is used as
7013 a get_unnamed_section callback. */
7016 output_section_asm_op (const void *directive
)
7018 fprintf (asm_out_file
, "%s\n", (const char *) directive
);
7021 /* Emit assembly code to switch to section NEW_SECTION. Do nothing if
7022 the current section is NEW_SECTION. */
7025 switch_to_section (section
*new_section
)
7027 if (in_section
== new_section
)
7030 if (new_section
->common
.flags
& SECTION_FORGET
)
7033 in_section
= new_section
;
7035 switch (SECTION_STYLE (new_section
))
7038 targetm
.asm_out
.named_section (new_section
->named
.name
,
7039 new_section
->named
.common
.flags
,
7040 new_section
->named
.decl
);
7043 case SECTION_UNNAMED
:
7044 new_section
->unnamed
.callback (new_section
->unnamed
.data
);
7047 case SECTION_NOSWITCH
:
7052 new_section
->common
.flags
|= SECTION_DECLARED
;
7055 /* If block symbol SYMBOL has not yet been assigned an offset, place
7056 it at the end of its block. */
7059 place_block_symbol (rtx symbol
)
7061 unsigned HOST_WIDE_INT size
, mask
, offset
;
7062 struct constant_descriptor_rtx
*desc
;
7063 unsigned int alignment
;
7064 struct object_block
*block
;
7067 gcc_assert (SYMBOL_REF_BLOCK (symbol
));
7068 if (SYMBOL_REF_BLOCK_OFFSET (symbol
) >= 0)
7071 /* Work out the symbol's size and alignment. */
7072 if (CONSTANT_POOL_ADDRESS_P (symbol
))
7074 desc
= SYMBOL_REF_CONSTANT (symbol
);
7075 alignment
= desc
->align
;
7076 size
= GET_MODE_SIZE (desc
->mode
);
7078 else if (TREE_CONSTANT_POOL_ADDRESS_P (symbol
))
7080 decl
= SYMBOL_REF_DECL (symbol
);
7081 alignment
= DECL_ALIGN (decl
);
7082 size
= get_constant_size (DECL_INITIAL (decl
));
7083 if ((flag_sanitize
& SANITIZE_ADDRESS
)
7084 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
7085 && asan_protect_global (DECL_INITIAL (decl
)))
7086 size
+= asan_red_zone_size (size
);
7090 decl
= SYMBOL_REF_DECL (symbol
);
7091 alignment
= get_variable_align (decl
);
7092 size
= tree_low_cst (DECL_SIZE_UNIT (decl
), 1);
7093 if ((flag_sanitize
& SANITIZE_ADDRESS
)
7094 && asan_protect_global (decl
))
7096 size
+= asan_red_zone_size (size
);
7097 alignment
= MAX (alignment
,
7098 ASAN_RED_ZONE_SIZE
* BITS_PER_UNIT
);
7102 /* Calculate the object's offset from the start of the block. */
7103 block
= SYMBOL_REF_BLOCK (symbol
);
7104 mask
= alignment
/ BITS_PER_UNIT
- 1;
7105 offset
= (block
->size
+ mask
) & ~mask
;
7106 SYMBOL_REF_BLOCK_OFFSET (symbol
) = offset
;
7108 /* Record the block's new alignment and size. */
7109 block
->alignment
= MAX (block
->alignment
, alignment
);
7110 block
->size
= offset
+ size
;
7112 vec_safe_push (block
->objects
, symbol
);
7115 /* Return the anchor that should be used to address byte offset OFFSET
7116 from the first object in BLOCK. MODEL is the TLS model used
7120 get_section_anchor (struct object_block
*block
, HOST_WIDE_INT offset
,
7121 enum tls_model model
)
7124 unsigned int begin
, middle
, end
;
7125 unsigned HOST_WIDE_INT min_offset
, max_offset
, range
, bias
, delta
;
7128 /* Work out the anchor's offset. Use an offset of 0 for the first
7129 anchor so that we don't pessimize the case where we take the address
7130 of a variable at the beginning of the block. This is particularly
7131 useful when a block has only one variable assigned to it.
7133 We try to place anchors RANGE bytes apart, so there can then be
7134 anchors at +/-RANGE, +/-2 * RANGE, and so on, up to the limits of
7135 a ptr_mode offset. With some target settings, the lowest such
7136 anchor might be out of range for the lowest ptr_mode offset;
7137 likewise the highest anchor for the highest offset. Use anchors
7138 at the extreme ends of the ptr_mode range in such cases.
7140 All arithmetic uses unsigned integers in order to avoid
7142 max_offset
= (unsigned HOST_WIDE_INT
) targetm
.max_anchor_offset
;
7143 min_offset
= (unsigned HOST_WIDE_INT
) targetm
.min_anchor_offset
;
7144 range
= max_offset
- min_offset
+ 1;
7149 bias
= 1 << (GET_MODE_BITSIZE (ptr_mode
) - 1);
7152 delta
= -(unsigned HOST_WIDE_INT
) offset
+ max_offset
;
7153 delta
-= delta
% range
;
7156 offset
= (HOST_WIDE_INT
) (-delta
);
7160 delta
= (unsigned HOST_WIDE_INT
) offset
- min_offset
;
7161 delta
-= delta
% range
;
7162 if (delta
> bias
- 1)
7164 offset
= (HOST_WIDE_INT
) delta
;
7168 /* Do a binary search to see if there's already an anchor we can use.
7169 Set BEGIN to the new anchor's index if not. */
7171 end
= vec_safe_length (block
->anchors
);
7172 while (begin
!= end
)
7174 middle
= (end
+ begin
) / 2;
7175 anchor
= (*block
->anchors
)[middle
];
7176 if (SYMBOL_REF_BLOCK_OFFSET (anchor
) > offset
)
7178 else if (SYMBOL_REF_BLOCK_OFFSET (anchor
) < offset
)
7180 else if (SYMBOL_REF_TLS_MODEL (anchor
) > model
)
7182 else if (SYMBOL_REF_TLS_MODEL (anchor
) < model
)
7188 /* Create a new anchor with a unique label. */
7189 ASM_GENERATE_INTERNAL_LABEL (label
, "LANCHOR", anchor_labelno
++);
7190 anchor
= create_block_symbol (ggc_strdup (label
), block
, offset
);
7191 SYMBOL_REF_FLAGS (anchor
) |= SYMBOL_FLAG_LOCAL
| SYMBOL_FLAG_ANCHOR
;
7192 SYMBOL_REF_FLAGS (anchor
) |= model
<< SYMBOL_FLAG_TLS_SHIFT
;
7194 /* Insert it at index BEGIN. */
7195 vec_safe_insert (block
->anchors
, begin
, anchor
);
7199 /* Output the objects in BLOCK. */
7202 output_object_block (struct object_block
*block
)
7204 struct constant_descriptor_rtx
*desc
;
7206 HOST_WIDE_INT offset
;
7210 if (!block
->objects
)
7213 /* Switch to the section and make sure that the first byte is
7214 suitably aligned. */
7215 switch_to_section (block
->sect
);
7216 assemble_align (block
->alignment
);
7218 /* Define the values of all anchors relative to the current section
7220 FOR_EACH_VEC_SAFE_ELT (block
->anchors
, i
, symbol
)
7221 targetm
.asm_out
.output_anchor (symbol
);
7223 /* Output the objects themselves. */
7225 FOR_EACH_VEC_ELT (*block
->objects
, i
, symbol
)
7227 /* Move to the object's offset, padding with zeros if necessary. */
7228 assemble_zeros (SYMBOL_REF_BLOCK_OFFSET (symbol
) - offset
);
7229 offset
= SYMBOL_REF_BLOCK_OFFSET (symbol
);
7230 if (CONSTANT_POOL_ADDRESS_P (symbol
))
7232 desc
= SYMBOL_REF_CONSTANT (symbol
);
7233 output_constant_pool_1 (desc
, 1);
7234 offset
+= GET_MODE_SIZE (desc
->mode
);
7236 else if (TREE_CONSTANT_POOL_ADDRESS_P (symbol
))
7239 decl
= SYMBOL_REF_DECL (symbol
);
7240 assemble_constant_contents (DECL_INITIAL (decl
), XSTR (symbol
, 0),
7242 size
= get_constant_size (DECL_INITIAL (decl
));
7244 if ((flag_sanitize
& SANITIZE_ADDRESS
)
7245 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
7246 && asan_protect_global (DECL_INITIAL (decl
)))
7248 size
= asan_red_zone_size (size
);
7249 assemble_zeros (size
);
7256 decl
= SYMBOL_REF_DECL (symbol
);
7257 assemble_variable_contents (decl
, XSTR (symbol
, 0), false);
7258 size
= tree_low_cst (DECL_SIZE_UNIT (decl
), 1);
7260 if ((flag_sanitize
& SANITIZE_ADDRESS
)
7261 && asan_protect_global (decl
))
7263 size
= asan_red_zone_size (size
);
7264 assemble_zeros (size
);
7271 /* A htab_traverse callback used to call output_object_block for
7272 each member of object_block_htab. */
7275 output_object_block_htab (void **slot
, void *data ATTRIBUTE_UNUSED
)
7277 output_object_block ((struct object_block
*) (*slot
));
7281 /* Output the definitions of all object_blocks. */
7284 output_object_blocks (void)
7286 htab_traverse (object_block_htab
, output_object_block_htab
, NULL
);
7289 /* This function provides a possible implementation of the
7290 TARGET_ASM_RECORD_GCC_SWITCHES target hook for ELF targets. When triggered
7291 by -frecord-gcc-switches it creates a new mergeable, string section in the
7292 assembler output file called TARGET_ASM_RECORD_GCC_SWITCHES_SECTION which
7293 contains the switches in ASCII format.
7295 FIXME: This code does not correctly handle double quote characters
7296 that appear inside strings, (it strips them rather than preserving them).
7297 FIXME: ASM_OUTPUT_ASCII, as defined in config/elfos.h will not emit NUL
7298 characters - instead it treats them as sub-string separators. Since
7299 we want to emit NUL strings terminators into the object file we have to use
7303 elf_record_gcc_switches (print_switch_type type
, const char * name
)
7307 case SWITCH_TYPE_PASSED
:
7308 ASM_OUTPUT_ASCII (asm_out_file
, name
, strlen (name
));
7309 ASM_OUTPUT_SKIP (asm_out_file
, (unsigned HOST_WIDE_INT
) 1);
7312 case SWITCH_TYPE_DESCRIPTIVE
:
7315 /* Distinguish between invocations where name is NULL. */
7316 static bool started
= false;
7322 sec
= get_section (targetm
.asm_out
.record_gcc_switches_section
,
7326 | (SECTION_ENTSIZE
& 1),
7328 switch_to_section (sec
);
7337 /* The return value is currently ignored by the caller, but must be 0.
7338 For -fverbose-asm the return value would be the number of characters
7339 emitted into the assembler file. */
7343 /* Emit text to declare externally defined symbols. It is needed to
7344 properly support non-default visibility. */
7346 default_elf_asm_output_external (FILE *file ATTRIBUTE_UNUSED
,
7348 const char *name ATTRIBUTE_UNUSED
)
7350 /* We output the name if and only if TREE_SYMBOL_REFERENCED is
7351 set in order to avoid putting out names that are never really
7353 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))
7354 && targetm
.binds_local_p (decl
))
7355 maybe_assemble_visibility (decl
);
7358 /* The default hook for TARGET_ASM_OUTPUT_SOURCE_FILENAME. */
7361 default_asm_output_source_filename (FILE *file
, const char *name
)
7363 #ifdef ASM_OUTPUT_SOURCE_FILENAME
7364 ASM_OUTPUT_SOURCE_FILENAME (file
, name
);
7366 fprintf (file
, "\t.file\t");
7367 output_quoted_string (file
, name
);
7372 /* Output a file name in the form wanted by System V. */
7375 output_file_directive (FILE *asm_file
, const char *input_name
)
7380 if (input_name
== NULL
)
7381 input_name
= "<stdin>";
7383 input_name
= remap_debug_filename (input_name
);
7385 len
= strlen (input_name
);
7386 na
= input_name
+ len
;
7388 /* NA gets INPUT_NAME sans directory names. */
7389 while (na
> input_name
)
7391 if (IS_DIR_SEPARATOR (na
[-1]))
7396 targetm
.asm_out
.output_source_filename (asm_file
, na
);
7399 /* Create a DEBUG_EXPR_DECL / DEBUG_EXPR pair from RTL expression
7402 make_debug_expr_from_rtl (const_rtx exp
)
7404 tree ddecl
= make_node (DEBUG_EXPR_DECL
), type
;
7405 enum machine_mode mode
= GET_MODE (exp
);
7408 DECL_ARTIFICIAL (ddecl
) = 1;
7409 if (REG_P (exp
) && REG_EXPR (exp
))
7410 type
= TREE_TYPE (REG_EXPR (exp
));
7411 else if (MEM_P (exp
) && MEM_EXPR (exp
))
7412 type
= TREE_TYPE (MEM_EXPR (exp
));
7415 if (type
&& TYPE_MODE (type
) == mode
)
7416 TREE_TYPE (ddecl
) = type
;
7418 TREE_TYPE (ddecl
) = lang_hooks
.types
.type_for_mode (mode
, 1);
7419 DECL_MODE (ddecl
) = mode
;
7420 dval
= gen_rtx_DEBUG_EXPR (mode
);
7421 DEBUG_EXPR_TREE_DECL (dval
) = ddecl
;
7422 SET_DECL_RTL (ddecl
, dval
);
7426 #ifdef ELF_ASCII_ESCAPES
7427 /* Default ASM_OUTPUT_LIMITED_STRING for ELF targets. */
7430 default_elf_asm_output_limited_string (FILE *f
, const char *s
)
7435 fputs (STRING_ASM_OP
, f
);
7440 escape
= ELF_ASCII_ESCAPES
[c
];
7447 /* TODO: Print in hex with fast function, important for -flto. */
7448 fprintf (f
, "\\%03o", c
);
7461 /* Default ASM_OUTPUT_ASCII for ELF targets. */
7464 default_elf_asm_output_ascii (FILE *f
, const char *s
, unsigned int len
)
7466 const char *limit
= s
+ len
;
7467 const char *last_null
= NULL
;
7468 unsigned bytes_in_chunk
= 0;
7472 for (; s
< limit
; s
++)
7476 if (bytes_in_chunk
>= 60)
7485 for (p
= s
; p
< limit
&& *p
!= '\0'; p
++)
7492 if (p
< limit
&& (p
- s
) <= (long) ELF_STRING_LIMIT
)
7494 if (bytes_in_chunk
> 0)
7501 default_elf_asm_output_limited_string (f
, s
);
7506 if (bytes_in_chunk
== 0)
7507 fputs (ASCII_DATA_ASM_OP
"\"", f
);
7510 escape
= ELF_ASCII_ESCAPES
[c
];
7518 /* TODO: Print in hex with fast function, important for -flto. */
7519 fprintf (f
, "\\%03o", c
);
7520 bytes_in_chunk
+= 4;
7525 bytes_in_chunk
+= 2;
7532 if (bytes_in_chunk
> 0)
7540 static GTY(()) section
*elf_init_array_section
;
7541 static GTY(()) section
*elf_fini_array_section
;
7544 get_elf_initfini_array_priority_section (int priority
,
7548 if (priority
!= DEFAULT_INIT_PRIORITY
)
7551 sprintf (buf
, "%s.%.5u",
7552 constructor_p
? ".init_array" : ".fini_array",
7554 sec
= get_section (buf
, SECTION_WRITE
| SECTION_NOTYPE
, NULL_TREE
);
7560 if (elf_init_array_section
== NULL
)
7561 elf_init_array_section
7562 = get_section (".init_array",
7563 SECTION_WRITE
| SECTION_NOTYPE
, NULL_TREE
);
7564 sec
= elf_init_array_section
;
7568 if (elf_fini_array_section
== NULL
)
7569 elf_fini_array_section
7570 = get_section (".fini_array",
7571 SECTION_WRITE
| SECTION_NOTYPE
, NULL_TREE
);
7572 sec
= elf_fini_array_section
;
7578 /* Use .init_array section for constructors. */
7581 default_elf_init_array_asm_out_constructor (rtx symbol
, int priority
)
7583 section
*sec
= get_elf_initfini_array_priority_section (priority
,
7585 assemble_addr_to_section (symbol
, sec
);
7588 /* Use .fini_array section for destructors. */
7591 default_elf_fini_array_asm_out_destructor (rtx symbol
, int priority
)
7593 section
*sec
= get_elf_initfini_array_priority_section (priority
,
7595 assemble_addr_to_section (symbol
, sec
);
7598 /* Default TARGET_ASM_OUTPUT_IDENT hook.
7600 This is a bit of a cheat. The real default is a no-op, but this
7601 hook is the default for all targets with a .ident directive. */
7604 default_asm_output_ident_directive (const char *ident_str
)
7606 const char *ident_asm_op
= "\t.ident\t";
7608 /* If we are still in the front end, do not write out the string
7609 to asm_out_file. Instead, add a fake top-level asm statement.
7610 This allows the front ends to use this hook without actually
7611 writing to asm_out_file, to handle #ident or Pragma Ident. */
7612 if (cgraph_state
== CGRAPH_STATE_PARSING
)
7614 char *buf
= ACONCAT ((ident_asm_op
, "\"", ident_str
, "\"\n", NULL
));
7615 add_asm_node (build_string (strlen (buf
), buf
));
7618 fprintf (asm_out_file
, "%s\"%s\"\n", ident_asm_op
, ident_str
);
7621 #include "gt-varasm.h"