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Commit | Line | Data |
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79e68feb | 1 | /* Output variables, constants and external declarations, for GNU compiler. |
06ceef4e | 2 | Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, |
a8154559 | 3 | 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
79e68feb | 4 | |
1322177d | 5 | This file is part of GCC. |
79e68feb | 6 | |
1322177d LB |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
79e68feb | 11 | |
1322177d LB |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
79e68feb RS |
16 | |
17 | You should have received a copy of the GNU General Public License | |
1322177d LB |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
79e68feb RS |
21 | |
22 | ||
23 | /* This file handles generation of all the assembler code | |
24 | *except* the instructions of a function. | |
25 | This includes declarations of variables and their initial values. | |
26 | ||
27 | We also output the assembler code for constants stored in memory | |
28 | and are responsible for combining constants with the same value. */ | |
29 | ||
e9a25f70 | 30 | #include "config.h" |
670ee920 | 31 | #include "system.h" |
79e68feb RS |
32 | #include "rtl.h" |
33 | #include "tree.h" | |
34 | #include "flags.h" | |
57632c51 | 35 | #include "function.h" |
79e68feb RS |
36 | #include "expr.h" |
37 | #include "hard-reg-set.h" | |
38 | #include "regs.h" | |
fbd40359 | 39 | #include "output.h" |
24b09b50 | 40 | #include "real.h" |
10f0ad3d | 41 | #include "toplev.h" |
79e68feb | 42 | #include "obstack.h" |
bd7cf17e | 43 | #include "hashtab.h" |
3d6f7931 | 44 | #include "c-pragma.h" |
79c4e63f | 45 | #include "c-tree.h" |
87ff9c8e | 46 | #include "ggc.h" |
ac79cd5a | 47 | #include "langhooks.h" |
aa388f29 | 48 | #include "tm_p.h" |
653e276c | 49 | #include "debug.h" |
7c262518 | 50 | #include "target.h" |
79e68feb | 51 | |
440aabf8 NB |
52 | #ifdef XCOFF_DEBUGGING_INFO |
53 | #include "xcoffout.h" /* Needed for external data | |
54 | declarations for e.g. AIX 4.x. */ | |
55 | #endif | |
56 | ||
073b0524 RK |
57 | #ifndef TRAMPOLINE_ALIGNMENT |
58 | #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY | |
59 | #endif | |
60 | ||
79e68feb | 61 | #ifndef ASM_STABS_OP |
0a3e1f45 | 62 | #define ASM_STABS_OP "\t.stabs\t" |
79e68feb RS |
63 | #endif |
64 | ||
79e68feb | 65 | /* The (assembler) name of the first globally-visible object output. */ |
3b304f5b ZW |
66 | const char *first_global_object_name; |
67 | const char *weak_global_object_name; | |
79e68feb | 68 | |
79e68feb RS |
69 | extern struct obstack permanent_obstack; |
70 | #define obstack_chunk_alloc xmalloc | |
79e68feb | 71 | |
36edd3cc BS |
72 | struct addr_const; |
73 | struct constant_descriptor; | |
74 | struct rtx_const; | |
75 | struct pool_constant; | |
76 | ||
77 | #define MAX_RTX_HASH_TABLE 61 | |
78 | ||
79 | struct varasm_status | |
80 | { | |
81 | /* Hash facility for making memory-constants | |
82 | from constant rtl-expressions. It is used on RISC machines | |
83 | where immediate integer arguments and constant addresses are restricted | |
84 | so that such constants must be stored in memory. | |
85 | ||
86 | This pool of constants is reinitialized for each function | |
87 | so each function gets its own constants-pool that comes right before | |
88 | it. */ | |
89 | struct constant_descriptor **x_const_rtx_hash_table; | |
94b01be3 | 90 | struct pool_constant **x_const_rtx_sym_hash_table; |
36edd3cc BS |
91 | |
92 | /* Pointers to first and last constant in pool. */ | |
93 | struct pool_constant *x_first_pool, *x_last_pool; | |
94 | ||
95 | /* Current offset in constant pool (does not include any machine-specific | |
ffc5c6a9 | 96 | header). */ |
a79e3a45 | 97 | HOST_WIDE_INT x_pool_offset; |
36edd3cc BS |
98 | }; |
99 | ||
01d939e8 BS |
100 | #define const_rtx_hash_table (cfun->varasm->x_const_rtx_hash_table) |
101 | #define const_rtx_sym_hash_table (cfun->varasm->x_const_rtx_sym_hash_table) | |
102 | #define first_pool (cfun->varasm->x_first_pool) | |
103 | #define last_pool (cfun->varasm->x_last_pool) | |
104 | #define pool_offset (cfun->varasm->x_pool_offset) | |
36edd3cc | 105 | |
79e68feb RS |
106 | /* Number for making the label on the next |
107 | constant that is stored in memory. */ | |
108 | ||
109 | int const_labelno; | |
110 | ||
111 | /* Number for making the label on the next | |
112 | static variable internal to a function. */ | |
113 | ||
114 | int var_labelno; | |
115 | ||
dcc8e5e6 RS |
116 | /* Carry information from ASM_DECLARE_OBJECT_NAME |
117 | to ASM_FINISH_DECLARE_OBJECT. */ | |
118 | ||
119 | int size_directive_output; | |
120 | ||
cbed4565 RS |
121 | /* The last decl for which assemble_variable was called, |
122 | if it did ASM_DECLARE_OBJECT_NAME. | |
123 | If the last call to assemble_variable didn't do that, | |
124 | this holds 0. */ | |
125 | ||
126 | tree last_assemble_variable_decl; | |
127 | ||
a79e3a45 RK |
128 | /* RTX_UNCHANGING_P in a MEM can mean it is stored into, for initialization. |
129 | So giving constant the alias set for the type will allow such | |
130 | initializations to appear to conflict with the load of the constant. We | |
131 | avoid this by giving all constants an alias set for just constants. | |
a8154559 | 132 | Since there will be no stores to that alias set, nothing will ever |
a79e3a45 RK |
133 | conflict with them. */ |
134 | ||
135 | static HOST_WIDE_INT const_alias_set; | |
136 | ||
58782098 KG |
137 | static const char *strip_reg_name PARAMS ((const char *)); |
138 | static int contains_pointers_p PARAMS ((tree)); | |
139 | static void decode_addr_const PARAMS ((tree, struct addr_const *)); | |
140 | static int const_hash PARAMS ((tree)); | |
141 | static int compare_constant PARAMS ((tree, | |
5a13eaa4 | 142 | struct constant_descriptor *)); |
990e8954 | 143 | static const unsigned char *compare_constant_1 PARAMS ((tree, const unsigned char *)); |
58782098 KG |
144 | static struct constant_descriptor *record_constant PARAMS ((tree)); |
145 | static void record_constant_1 PARAMS ((tree)); | |
146 | static tree copy_constant PARAMS ((tree)); | |
147 | static void output_constant_def_contents PARAMS ((tree, int, int)); | |
148 | static void decode_rtx_const PARAMS ((enum machine_mode, rtx, | |
5a13eaa4 | 149 | struct rtx_const *)); |
58782098 KG |
150 | static int const_hash_rtx PARAMS ((enum machine_mode, rtx)); |
151 | static int compare_constant_rtx PARAMS ((enum machine_mode, rtx, | |
5a13eaa4 | 152 | struct constant_descriptor *)); |
58782098 | 153 | static struct constant_descriptor *record_constant_rtx PARAMS ((enum machine_mode, |
5a13eaa4 | 154 | rtx)); |
58782098 KG |
155 | static struct pool_constant *find_pool_constant PARAMS ((struct function *, rtx)); |
156 | static void mark_constant_pool PARAMS ((void)); | |
157 | static void mark_constants PARAMS ((rtx)); | |
fcbd8ef2 | 158 | static int mark_constant PARAMS ((rtx *current_rtx, void *data)); |
58782098 KG |
159 | static int output_addressed_constants PARAMS ((tree)); |
160 | static void output_after_function_constants PARAMS ((void)); | |
ffc5c6a9 | 161 | static unsigned HOST_WIDE_INT array_size_for_constructor PARAMS ((tree)); |
c8af3574 | 162 | static unsigned min_align PARAMS ((unsigned, unsigned)); |
ac79cd5a RK |
163 | static void output_constructor PARAMS ((tree, HOST_WIDE_INT, |
164 | unsigned int)); | |
19c5b1cf | 165 | static void globalize_decl PARAMS ((tree)); |
b14707c3 | 166 | static void maybe_assemble_visibility PARAMS ((tree)); |
715bdd29 RH |
167 | static int in_named_entry_eq PARAMS ((const PTR, const PTR)); |
168 | static hashval_t in_named_entry_hash PARAMS ((const PTR)); | |
0e05e8ea | 169 | #ifdef ASM_OUTPUT_BSS |
3cce094d | 170 | static void asm_output_bss PARAMS ((FILE *, tree, const char *, int, int)); |
0e05e8ea | 171 | #endif |
cab634f2 | 172 | #ifdef BSS_SECTION_ASM_OP |
0e05e8ea | 173 | #ifdef ASM_OUTPUT_ALIGNED_BSS |
3cce094d KG |
174 | static void asm_output_aligned_bss PARAMS ((FILE *, tree, const char *, |
175 | int, int)); | |
0e05e8ea | 176 | #endif |
cab634f2 | 177 | #endif /* BSS_SECTION_ASM_OP */ |
58782098 | 178 | static void mark_pool_constant PARAMS ((struct pool_constant *)); |
58782098 | 179 | static void mark_const_hash_entry PARAMS ((void *)); |
bd7cf17e JJ |
180 | static int mark_const_str_htab_1 PARAMS ((void **, void *)); |
181 | static void mark_const_str_htab PARAMS ((void *)); | |
182 | static hashval_t const_str_htab_hash PARAMS ((const void *x)); | |
183 | static int const_str_htab_eq PARAMS ((const void *x, const void *y)); | |
184 | static void const_str_htab_del PARAMS ((void *)); | |
3cce094d | 185 | static void asm_emit_uninitialised PARAMS ((tree, const char*, int, int)); |
1b18fc2c | 186 | static void resolve_unique_section PARAMS ((tree, int, int)); |
f90bf7ca | 187 | static void mark_weak PARAMS ((tree)); |
79e68feb | 188 | \f |
e5887033 DE |
189 | static enum in_section { no_section, in_text, in_data, in_named |
190 | #ifdef BSS_SECTION_ASM_OP | |
191 | , in_bss | |
192 | #endif | |
2cc07db4 RH |
193 | #ifdef CTORS_SECTION_ASM_OP |
194 | , in_ctors | |
195 | #endif | |
196 | #ifdef DTORS_SECTION_ASM_OP | |
197 | , in_dtors | |
198 | #endif | |
d48bc59a RH |
199 | #ifdef READONLY_DATA_SECTION_ASM_OP |
200 | , in_readonly_data | |
201 | #endif | |
79e68feb | 202 | #ifdef EXTRA_SECTIONS |
e5887033 | 203 | , EXTRA_SECTIONS |
79e68feb | 204 | #endif |
e5887033 | 205 | } in_section = no_section; |
79e68feb | 206 | |
8a425a05 | 207 | /* Return a non-zero value if DECL has a section attribute. */ |
a56e7c08 | 208 | #ifndef IN_NAMED_SECTION |
8a425a05 DE |
209 | #define IN_NAMED_SECTION(DECL) \ |
210 | ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \ | |
211 | && DECL_SECTION_NAME (DECL) != NULL_TREE) | |
a56e7c08 | 212 | #endif |
46f9491e | 213 | |
8a425a05 | 214 | /* Text of section name when in_section == in_named. */ |
520a57c8 | 215 | static const char *in_named_name; |
8a425a05 | 216 | |
715bdd29 RH |
217 | /* Hash table of flags that have been used for a particular named section. */ |
218 | ||
219 | struct in_named_entry | |
220 | { | |
221 | const char *name; | |
222 | unsigned int flags; | |
a8c01a59 | 223 | bool declared; |
715bdd29 RH |
224 | }; |
225 | ||
226 | static htab_t in_named_htab; | |
227 | ||
79e68feb RS |
228 | /* Define functions like text_section for any extra sections. */ |
229 | #ifdef EXTRA_SECTION_FUNCTIONS | |
230 | EXTRA_SECTION_FUNCTIONS | |
231 | #endif | |
232 | ||
233 | /* Tell assembler to switch to text section. */ | |
234 | ||
235 | void | |
236 | text_section () | |
237 | { | |
238 | if (in_section != in_text) | |
239 | { | |
d48bc59a | 240 | in_section = in_text; |
f99ffb60 RH |
241 | #ifdef TEXT_SECTION |
242 | TEXT_SECTION (); | |
243 | #else | |
b93a436e | 244 | fprintf (asm_out_file, "%s\n", TEXT_SECTION_ASM_OP); |
f99ffb60 | 245 | #endif |
79e68feb RS |
246 | } |
247 | } | |
248 | ||
79e68feb RS |
249 | /* Tell assembler to switch to data section. */ |
250 | ||
251 | void | |
252 | data_section () | |
253 | { | |
254 | if (in_section != in_data) | |
255 | { | |
d48bc59a | 256 | in_section = in_data; |
b93a436e | 257 | if (flag_shared_data) |
79e68feb RS |
258 | { |
259 | #ifdef SHARED_SECTION_ASM_OP | |
b93a436e | 260 | fprintf (asm_out_file, "%s\n", SHARED_SECTION_ASM_OP); |
79e68feb | 261 | #else |
b93a436e | 262 | fprintf (asm_out_file, "%s\n", DATA_SECTION_ASM_OP); |
79e68feb RS |
263 | #endif |
264 | } | |
b93a436e JL |
265 | else |
266 | fprintf (asm_out_file, "%s\n", DATA_SECTION_ASM_OP); | |
79e68feb RS |
267 | } |
268 | } | |
c26fbbca | 269 | |
3167de5b | 270 | /* Tell assembler to ALWAYS switch to data section, in case |
dd49a9ec | 271 | it's not sure where it is. */ |
3167de5b AM |
272 | |
273 | void | |
274 | force_data_section () | |
275 | { | |
276 | in_section = no_section; | |
277 | data_section (); | |
278 | } | |
79e68feb | 279 | |
7c6d68c8 RS |
280 | /* Tell assembler to switch to read-only data section. This is normally |
281 | the text section. */ | |
282 | ||
283 | void | |
284 | readonly_data_section () | |
285 | { | |
286 | #ifdef READONLY_DATA_SECTION | |
287 | READONLY_DATA_SECTION (); /* Note this can call data_section. */ | |
d48bc59a RH |
288 | #else |
289 | #ifdef READONLY_DATA_SECTION_ASM_OP | |
290 | if (in_section != in_readonly_data) | |
291 | { | |
292 | in_section = in_readonly_data; | |
293 | fputs (READONLY_DATA_SECTION_ASM_OP, asm_out_file); | |
294 | fputc ('\n', asm_out_file); | |
295 | } | |
7c6d68c8 RS |
296 | #else |
297 | text_section (); | |
298 | #endif | |
d48bc59a | 299 | #endif |
7c6d68c8 RS |
300 | } |
301 | ||
0f41302f | 302 | /* Determine if we're in the text section. */ |
79e68feb RS |
303 | |
304 | int | |
305 | in_text_section () | |
306 | { | |
307 | return in_section == in_text; | |
308 | } | |
8a425a05 | 309 | |
0f41302f | 310 | /* Determine if we're in the data section. */ |
6f2f3db7 | 311 | |
274351ba RK |
312 | int |
313 | in_data_section () | |
314 | { | |
315 | return in_section == in_data; | |
316 | } | |
6f2f3db7 | 317 | |
715bdd29 RH |
318 | /* Helper routines for maintaining in_named_htab. */ |
319 | ||
320 | static int | |
321 | in_named_entry_eq (p1, p2) | |
322 | const PTR p1; | |
323 | const PTR p2; | |
324 | { | |
325 | const struct in_named_entry *old = p1; | |
326 | const char *new = p2; | |
327 | ||
328 | return strcmp (old->name, new) == 0; | |
329 | } | |
330 | ||
331 | static hashval_t | |
332 | in_named_entry_hash (p) | |
333 | const PTR p; | |
334 | { | |
335 | const struct in_named_entry *old = p; | |
336 | return htab_hash_string (old->name); | |
337 | } | |
338 | ||
339 | /* If SECTION has been seen before as a named section, return the flags | |
340 | that were used. Otherwise, return 0. Note, that 0 is a perfectly valid | |
341 | set of flags for a section to have, so 0 does not mean that the section | |
342 | has not been seen. */ | |
343 | ||
344 | unsigned int | |
345 | get_named_section_flags (section) | |
346 | const char *section; | |
347 | { | |
348 | struct in_named_entry **slot; | |
349 | ||
c26fbbca | 350 | slot = (struct in_named_entry **) |
715bdd29 RH |
351 | htab_find_slot_with_hash (in_named_htab, section, |
352 | htab_hash_string (section), NO_INSERT); | |
353 | ||
354 | return slot ? (*slot)->flags : 0; | |
355 | } | |
356 | ||
a8c01a59 | 357 | /* Returns true if the section has been declared before. Sets internal |
c26fbbca | 358 | flag on this section in in_named_hash so subsequent calls on this |
2ba84f36 | 359 | section will return false. */ |
a8c01a59 RL |
360 | |
361 | bool | |
362 | named_section_first_declaration (name) | |
363 | const char *name; | |
364 | { | |
365 | struct in_named_entry **slot; | |
366 | ||
c26fbbca KH |
367 | slot = (struct in_named_entry **) |
368 | htab_find_slot_with_hash (in_named_htab, name, | |
a8c01a59 RL |
369 | htab_hash_string (name), NO_INSERT); |
370 | if (! (*slot)->declared) | |
371 | { | |
372 | (*slot)->declared = true; | |
373 | return true; | |
374 | } | |
c26fbbca | 375 | else |
a8c01a59 RL |
376 | { |
377 | return false; | |
378 | } | |
379 | } | |
380 | ||
381 | ||
715bdd29 RH |
382 | /* Record FLAGS for SECTION. If SECTION was previously recorded with a |
383 | different set of flags, return false. */ | |
384 | ||
385 | bool | |
386 | set_named_section_flags (section, flags) | |
387 | const char *section; | |
388 | unsigned int flags; | |
389 | { | |
390 | struct in_named_entry **slot, *entry; | |
391 | ||
c26fbbca | 392 | slot = (struct in_named_entry **) |
715bdd29 RH |
393 | htab_find_slot_with_hash (in_named_htab, section, |
394 | htab_hash_string (section), INSERT); | |
395 | entry = *slot; | |
396 | ||
397 | if (!entry) | |
398 | { | |
399 | entry = (struct in_named_entry *) xmalloc (sizeof (*entry)); | |
400 | *slot = entry; | |
401 | entry->name = ggc_strdup (section); | |
402 | entry->flags = flags; | |
8d2134aa | 403 | entry->declared = false; |
715bdd29 RH |
404 | } |
405 | else if (entry->flags != flags) | |
406 | return false; | |
407 | ||
408 | return true; | |
409 | } | |
410 | ||
7c262518 RH |
411 | /* Tell assembler to change to section NAME with attributes FLAGS. */ |
412 | ||
413 | void | |
715bdd29 | 414 | named_section_flags (name, flags) |
7c262518 RH |
415 | const char *name; |
416 | unsigned int flags; | |
7c262518 | 417 | { |
715bdd29 | 418 | if (in_section != in_named || strcmp (name, in_named_name) != 0) |
7c262518 | 419 | { |
715bdd29 RH |
420 | if (! set_named_section_flags (name, flags)) |
421 | abort (); | |
422 | ||
c26fbbca | 423 | (*targetm.asm_out.named_section) (name, flags); |
7c262518 RH |
424 | |
425 | if (flags & SECTION_FORGET) | |
426 | in_section = no_section; | |
427 | else | |
428 | { | |
429 | in_named_name = ggc_strdup (name); | |
430 | in_section = in_named; | |
431 | } | |
432 | } | |
433 | } | |
434 | ||
2ffe831c DE |
435 | /* Tell assembler to change to section NAME for DECL. |
436 | If DECL is NULL, just switch to section NAME. | |
ad4ff310 JM |
437 | If NAME is NULL, get the name from DECL. |
438 | If RELOC is 1, the initializer for DECL contains relocs. */ | |
8a425a05 DE |
439 | |
440 | void | |
ad4ff310 | 441 | named_section (decl, name, reloc) |
2ffe831c | 442 | tree decl; |
87e11268 | 443 | const char *name; |
7c262518 | 444 | int reloc; |
8a425a05 | 445 | { |
7c262518 RH |
446 | unsigned int flags; |
447 | ||
2f939d94 | 448 | if (decl != NULL_TREE && !DECL_P (decl)) |
2ffe831c DE |
449 | abort (); |
450 | if (name == NULL) | |
451 | name = TREE_STRING_POINTER (DECL_SECTION_NAME (decl)); | |
452 | ||
7c262518 | 453 | flags = (* targetm.section_type_flags) (decl, name, reloc); |
715bdd29 RH |
454 | |
455 | /* Sanity check user variables for flag changes. Non-user | |
10c45943 AG |
456 | section flag changes will abort in named_section_flags. |
457 | However, don't complain if SECTION_OVERRIDE is set. | |
458 | We trust that the setter knows that it is safe to ignore | |
459 | the default flags for this decl. */ | |
715bdd29 RH |
460 | if (decl && ! set_named_section_flags (name, flags)) |
461 | { | |
715bdd29 | 462 | flags = get_named_section_flags (name); |
10c45943 AG |
463 | if ((flags & SECTION_OVERRIDE) == 0) |
464 | error_with_decl (decl, "%s causes a section type conflict"); | |
715bdd29 RH |
465 | } |
466 | ||
467 | named_section_flags (name, flags); | |
7c262518 | 468 | } |
e9a25f70 | 469 | |
7c262518 RH |
470 | /* If required, set DECL_SECTION_NAME to a unique name. */ |
471 | ||
472 | static void | |
1b18fc2c | 473 | resolve_unique_section (decl, reloc, flag_function_or_data_sections) |
7c262518 | 474 | tree decl; |
715bdd29 | 475 | int reloc ATTRIBUTE_UNUSED; |
1b18fc2c | 476 | int flag_function_or_data_sections; |
7c262518 RH |
477 | { |
478 | if (DECL_SECTION_NAME (decl) == NULL_TREE | |
ae46c4e0 | 479 | && targetm.have_named_sections |
1b18fc2c | 480 | && (flag_function_or_data_sections |
ae46c4e0 RH |
481 | || DECL_ONE_ONLY (decl))) |
482 | (*targetm.asm_out.unique_section) (decl, reloc); | |
8a425a05 | 483 | } |
4d1065ed | 484 | |
e5887033 DE |
485 | #ifdef BSS_SECTION_ASM_OP |
486 | ||
487 | /* Tell the assembler to switch to the bss section. */ | |
488 | ||
489 | void | |
da2c5447 | 490 | bss_section () |
e5887033 DE |
491 | { |
492 | if (in_section != in_bss) | |
493 | { | |
e5887033 | 494 | #ifdef SHARED_BSS_SECTION_ASM_OP |
b93a436e JL |
495 | if (flag_shared_data) |
496 | fprintf (asm_out_file, "%s\n", SHARED_BSS_SECTION_ASM_OP); | |
497 | else | |
e5887033 | 498 | #endif |
b93a436e | 499 | fprintf (asm_out_file, "%s\n", BSS_SECTION_ASM_OP); |
e5887033 DE |
500 | |
501 | in_section = in_bss; | |
502 | } | |
503 | } | |
504 | ||
505 | #ifdef ASM_OUTPUT_BSS | |
506 | ||
507 | /* Utility function for ASM_OUTPUT_BSS for targets to use if | |
508 | they don't support alignments in .bss. | |
509 | ??? It is believed that this function will work in most cases so such | |
510 | support is localized here. */ | |
511 | ||
512 | static void | |
91fddd7c | 513 | asm_output_bss (file, decl, name, size, rounded) |
e5887033 | 514 | FILE *file; |
05b13f59 | 515 | tree decl ATTRIBUTE_UNUSED; |
3cce094d | 516 | const char *name; |
05b13f59 | 517 | int size ATTRIBUTE_UNUSED, rounded; |
e5887033 DE |
518 | { |
519 | ASM_GLOBALIZE_LABEL (file, name); | |
520 | bss_section (); | |
91fddd7c DE |
521 | #ifdef ASM_DECLARE_OBJECT_NAME |
522 | last_assemble_variable_decl = decl; | |
523 | ASM_DECLARE_OBJECT_NAME (file, name, decl); | |
524 | #else | |
525 | /* Standard thing is just output label for the object. */ | |
e5887033 | 526 | ASM_OUTPUT_LABEL (file, name); |
91fddd7c | 527 | #endif /* ASM_DECLARE_OBJECT_NAME */ |
e5887033 DE |
528 | ASM_OUTPUT_SKIP (file, rounded); |
529 | } | |
530 | ||
531 | #endif | |
532 | ||
533 | #ifdef ASM_OUTPUT_ALIGNED_BSS | |
534 | ||
535 | /* Utility function for targets to use in implementing | |
536 | ASM_OUTPUT_ALIGNED_BSS. | |
537 | ??? It is believed that this function will work in most cases so such | |
538 | support is localized here. */ | |
539 | ||
540 | static void | |
91fddd7c | 541 | asm_output_aligned_bss (file, decl, name, size, align) |
e5887033 | 542 | FILE *file; |
91ea4f8d | 543 | tree decl ATTRIBUTE_UNUSED; |
3cce094d | 544 | const char *name; |
e5887033 DE |
545 | int size, align; |
546 | { | |
547 | ASM_GLOBALIZE_LABEL (file, name); | |
548 | bss_section (); | |
549 | ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT)); | |
91fddd7c DE |
550 | #ifdef ASM_DECLARE_OBJECT_NAME |
551 | last_assemble_variable_decl = decl; | |
552 | ASM_DECLARE_OBJECT_NAME (file, name, decl); | |
553 | #else | |
554 | /* Standard thing is just output label for the object. */ | |
e5887033 | 555 | ASM_OUTPUT_LABEL (file, name); |
91fddd7c | 556 | #endif /* ASM_DECLARE_OBJECT_NAME */ |
f8bc3367 | 557 | ASM_OUTPUT_SKIP (file, size ? size : 1); |
e5887033 DE |
558 | } |
559 | ||
560 | #endif | |
561 | ||
562 | #endif /* BSS_SECTION_ASM_OP */ | |
563 | ||
4d1065ed DE |
564 | /* Switch to the section for function DECL. |
565 | ||
566 | If DECL is NULL_TREE, switch to the text section. | |
567 | ??? It's not clear that we will ever be passed NULL_TREE, but it's | |
568 | safer to handle it. */ | |
569 | ||
570 | void | |
571 | function_section (decl) | |
572 | tree decl; | |
573 | { | |
574 | if (decl != NULL_TREE | |
575 | && DECL_SECTION_NAME (decl) != NULL_TREE) | |
ad4ff310 | 576 | named_section (decl, (char *) 0, 0); |
8b43265c JL |
577 | else |
578 | text_section (); | |
4d1065ed | 579 | } |
f9da1f35 | 580 | |
ae46c4e0 RH |
581 | /* Switch to section for variable DECL. RELOC is the same as the |
582 | argument to SELECT_SECTION. */ | |
f9da1f35 DE |
583 | |
584 | void | |
585 | variable_section (decl, reloc) | |
586 | tree decl; | |
587 | int reloc; | |
588 | { | |
589 | if (IN_NAMED_SECTION (decl)) | |
ad4ff310 | 590 | named_section (decl, NULL, reloc); |
f9da1f35 | 591 | else |
ae46c4e0 | 592 | (*targetm.asm_out.select_section) (decl, reloc, DECL_ALIGN (decl)); |
f9da1f35 | 593 | } |
6adb4e3a MS |
594 | |
595 | /* Tell assembler to switch to the section for the exception handling | |
596 | table. */ | |
597 | ||
598 | void | |
07c9d2eb | 599 | default_exception_section () |
6adb4e3a | 600 | { |
7c262518 RH |
601 | if (targetm.have_named_sections) |
602 | named_section (NULL_TREE, ".gcc_except_table", 0); | |
603 | else if (flag_pic) | |
6adb4e3a MS |
604 | data_section (); |
605 | else | |
6adb4e3a | 606 | readonly_data_section (); |
6adb4e3a | 607 | } |
201556f0 JJ |
608 | |
609 | /* Tell assembler to switch to the section for string merging. */ | |
610 | ||
611 | void | |
612 | mergeable_string_section (decl, align, flags) | |
c26fbbca KH |
613 | tree decl ATTRIBUTE_UNUSED; |
614 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED; | |
615 | unsigned int flags ATTRIBUTE_UNUSED; | |
201556f0 JJ |
616 | { |
617 | #ifdef HAVE_GAS_SHF_MERGE | |
618 | if (flag_merge_constants | |
619 | && TREE_CODE (decl) == STRING_CST | |
620 | && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE | |
621 | && align <= 256 | |
622 | && TREE_STRING_LENGTH (decl) >= int_size_in_bytes (TREE_TYPE (decl))) | |
623 | { | |
624 | enum machine_mode mode; | |
625 | unsigned int modesize; | |
626 | const char *str; | |
627 | int i, j, len, unit; | |
628 | char name[30]; | |
629 | ||
630 | mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (decl))); | |
631 | modesize = GET_MODE_BITSIZE (mode); | |
632 | if (modesize >= 8 && modesize <= 256 | |
633 | && (modesize & (modesize - 1)) == 0) | |
634 | { | |
635 | if (align < modesize) | |
636 | align = modesize; | |
637 | ||
638 | str = TREE_STRING_POINTER (decl); | |
639 | len = TREE_STRING_LENGTH (decl); | |
640 | unit = GET_MODE_SIZE (mode); | |
641 | ||
642 | /* Check for embedded NUL characters. */ | |
643 | for (i = 0; i < len; i += unit) | |
644 | { | |
645 | for (j = 0; j < unit; j++) | |
c26fbbca | 646 | if (str[i + j] != '\0') |
201556f0 JJ |
647 | break; |
648 | if (j == unit) | |
649 | break; | |
650 | } | |
651 | if (i == len - unit) | |
652 | { | |
653 | sprintf (name, ".rodata.str%d.%d", modesize / 8, | |
654 | (int) (align / 8)); | |
655 | flags |= (modesize / 8) | SECTION_MERGE | SECTION_STRINGS; | |
656 | if (!i && modesize < align) | |
657 | { | |
658 | /* A "" string with requested alignment greater than | |
659 | character size might cause a problem: | |
660 | if some other string required even bigger | |
661 | alignment than "", then linker might think the | |
662 | "" is just part of padding after some other string | |
663 | and not put it into the hash table initially. | |
664 | But this means "" could have smaller alignment | |
665 | than requested. */ | |
666 | #ifdef ASM_OUTPUT_SECTION_START | |
667 | named_section_flags (name, flags); | |
668 | ASM_OUTPUT_SECTION_START (asm_out_file); | |
669 | #else | |
670 | readonly_data_section (); | |
671 | #endif | |
672 | return; | |
673 | } | |
674 | ||
675 | named_section_flags (name, flags); | |
676 | return; | |
677 | } | |
678 | } | |
679 | } | |
680 | #endif | |
681 | readonly_data_section (); | |
c26fbbca | 682 | } |
201556f0 JJ |
683 | |
684 | /* Tell assembler to switch to the section for constant merging. */ | |
685 | ||
686 | void | |
687 | mergeable_constant_section (mode, align, flags) | |
c26fbbca KH |
688 | enum machine_mode mode ATTRIBUTE_UNUSED; |
689 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED; | |
690 | unsigned int flags ATTRIBUTE_UNUSED; | |
201556f0 JJ |
691 | { |
692 | #ifdef HAVE_GAS_SHF_MERGE | |
693 | unsigned int modesize = GET_MODE_BITSIZE (mode); | |
694 | ||
695 | if (flag_merge_constants | |
696 | && mode != VOIDmode | |
697 | && mode != BLKmode | |
698 | && modesize <= align | |
699 | && align >= 8 | |
700 | && align <= 256 | |
701 | && (align & (align - 1)) == 0) | |
702 | { | |
703 | char name[24]; | |
704 | ||
705 | sprintf (name, ".rodata.cst%d", (int) (align / 8)); | |
706 | flags |= (align / 8) | SECTION_MERGE; | |
707 | named_section_flags (name, flags); | |
708 | return; | |
c26fbbca | 709 | } |
201556f0 JJ |
710 | #endif |
711 | readonly_data_section (); | |
712 | } | |
79e68feb | 713 | \f |
b4ac57ab RS |
714 | /* Given NAME, a putative register name, discard any customary prefixes. */ |
715 | ||
87e11268 | 716 | static const char * |
b4ac57ab | 717 | strip_reg_name (name) |
c26fbbca | 718 | const char *name; |
b4ac57ab RS |
719 | { |
720 | #ifdef REGISTER_PREFIX | |
721 | if (!strncmp (name, REGISTER_PREFIX, strlen (REGISTER_PREFIX))) | |
722 | name += strlen (REGISTER_PREFIX); | |
723 | #endif | |
724 | if (name[0] == '%' || name[0] == '#') | |
725 | name++; | |
726 | return name; | |
727 | } | |
dcfedcd0 | 728 | \f |
79e68feb RS |
729 | /* Decode an `asm' spec for a declaration as a register name. |
730 | Return the register number, or -1 if nothing specified, | |
c09e6498 RS |
731 | or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized, |
732 | or -3 if ASMSPEC is `cc' and is not recognized, | |
733 | or -4 if ASMSPEC is `memory' and is not recognized. | |
dcfedcd0 RK |
734 | Accept an exact spelling or a decimal number. |
735 | Prefixes such as % are optional. */ | |
79e68feb RS |
736 | |
737 | int | |
738 | decode_reg_name (asmspec) | |
c26fbbca | 739 | const char *asmspec; |
79e68feb RS |
740 | { |
741 | if (asmspec != 0) | |
742 | { | |
743 | int i; | |
744 | ||
b4ac57ab RS |
745 | /* Get rid of confusing prefixes. */ |
746 | asmspec = strip_reg_name (asmspec); | |
46f9491e | 747 | |
fff9e713 MT |
748 | /* Allow a decimal number as a "register name". */ |
749 | for (i = strlen (asmspec) - 1; i >= 0; i--) | |
0df6c2c7 | 750 | if (! ISDIGIT (asmspec[i])) |
fff9e713 MT |
751 | break; |
752 | if (asmspec[0] != 0 && i < 0) | |
753 | { | |
754 | i = atoi (asmspec); | |
755 | if (i < FIRST_PSEUDO_REGISTER && i >= 0) | |
756 | return i; | |
757 | else | |
758 | return -2; | |
759 | } | |
760 | ||
79e68feb | 761 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) |
b4ac57ab RS |
762 | if (reg_names[i][0] |
763 | && ! strcmp (asmspec, strip_reg_name (reg_names[i]))) | |
79e68feb RS |
764 | return i; |
765 | ||
79e68feb RS |
766 | #ifdef ADDITIONAL_REGISTER_NAMES |
767 | { | |
83182544 | 768 | static const struct { const char *const name; const int number; } table[] |
79e68feb RS |
769 | = ADDITIONAL_REGISTER_NAMES; |
770 | ||
b6a1cbae | 771 | for (i = 0; i < (int) ARRAY_SIZE (table); i++) |
79e68feb RS |
772 | if (! strcmp (asmspec, table[i].name)) |
773 | return table[i].number; | |
79e68feb RS |
774 | } |
775 | #endif /* ADDITIONAL_REGISTER_NAMES */ | |
776 | ||
c09e6498 RS |
777 | if (!strcmp (asmspec, "memory")) |
778 | return -4; | |
779 | ||
dcfedcd0 RK |
780 | if (!strcmp (asmspec, "cc")) |
781 | return -3; | |
782 | ||
79e68feb RS |
783 | return -2; |
784 | } | |
785 | ||
786 | return -1; | |
787 | } | |
788 | \f | |
19e7881c MM |
789 | /* Create the DECL_RTL for a VAR_DECL or FUNCTION_DECL. DECL should |
790 | have static storage duration. In other words, it should not be an | |
791 | automatic variable, including PARM_DECLs. | |
792 | ||
793 | There is, however, one exception: this function handles variables | |
794 | explicitly placed in a particular register by the user. | |
795 | ||
796 | ASMSPEC, if not 0, is the string which the user specified as the | |
797 | assembler symbol name. | |
79e68feb RS |
798 | |
799 | This is never called for PARM_DECL nodes. */ | |
800 | ||
801 | void | |
6c418184 | 802 | make_decl_rtl (decl, asmspec) |
79e68feb | 803 | tree decl; |
87e11268 | 804 | const char *asmspec; |
79e68feb | 805 | { |
6c418184 | 806 | int top_level = (DECL_CONTEXT (decl) == NULL_TREE); |
63ad61ed ZW |
807 | const char *name = 0; |
808 | const char *new_name = 0; | |
ca695ac9 | 809 | int reg_number; |
abde42f7 | 810 | rtx x; |
ca695ac9 | 811 | |
19e7881c | 812 | /* Check that we are not being given an automatic variable. */ |
9ea07fd0 | 813 | /* A weak alias has TREE_PUBLIC set but not the other bits. */ |
19e7881c MM |
814 | if (TREE_CODE (decl) == PARM_DECL |
815 | || TREE_CODE (decl) == RESULT_DECL | |
816 | || (TREE_CODE (decl) == VAR_DECL | |
817 | && !TREE_STATIC (decl) | |
9ea07fd0 | 818 | && !TREE_PUBLIC (decl) |
19e7881c MM |
819 | && !DECL_EXTERNAL (decl) |
820 | && !DECL_REGISTER (decl))) | |
821 | abort (); | |
822 | /* And that we were not given a type or a label. */ | |
46f9491e | 823 | else if (TREE_CODE (decl) == TYPE_DECL |
19e7881c MM |
824 | || TREE_CODE (decl) == LABEL_DECL) |
825 | abort (); | |
826 | ||
63ad61ed ZW |
827 | /* For a duplicate declaration, we can be called twice on the |
828 | same DECL node. Don't discard the RTL already made. */ | |
19e7881c | 829 | if (DECL_RTL_SET_P (decl)) |
79e68feb | 830 | { |
63ad61ed ZW |
831 | /* If the old RTL had the wrong mode, fix the mode. */ |
832 | if (GET_MODE (DECL_RTL (decl)) != DECL_MODE (decl)) | |
c4e59f51 RK |
833 | SET_DECL_RTL (decl, adjust_address_nv (DECL_RTL (decl), |
834 | DECL_MODE (decl), 0)); | |
76095e2f | 835 | |
63ad61ed ZW |
836 | /* ??? Another way to do this would be to do what halfpic.c does |
837 | and maintain a hashed table of such critters. */ | |
63ad61ed ZW |
838 | /* Let the target reassign the RTL if it wants. |
839 | This is necessary, for example, when one machine specific | |
840 | decl attribute overrides another. */ | |
fb49053f | 841 | (* targetm.encode_section_info) (decl, false); |
63ad61ed | 842 | return; |
79e68feb RS |
843 | } |
844 | ||
63ad61ed ZW |
845 | new_name = name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); |
846 | ||
847 | reg_number = decode_reg_name (asmspec); | |
848 | if (reg_number == -2) | |
8f820299 ZW |
849 | { |
850 | /* ASMSPEC is given, and not the name of a register. Mark the | |
851 | name with a star so assemble_name won't munge it. */ | |
852 | char *starred = alloca (strlen (asmspec) + 2); | |
853 | starred[0] = '*'; | |
854 | strcpy (starred + 1, asmspec); | |
855 | new_name = starred; | |
856 | } | |
63ad61ed ZW |
857 | |
858 | if (TREE_CODE (decl) != FUNCTION_DECL && DECL_REGISTER (decl)) | |
79e68feb | 859 | { |
79e68feb | 860 | /* First detect errors in declaring global registers. */ |
63ad61ed ZW |
861 | if (reg_number == -1) |
862 | error_with_decl (decl, "register name not specified for `%s'"); | |
863 | else if (reg_number < 0) | |
864 | error_with_decl (decl, "invalid register name for `%s'"); | |
865 | else if (TYPE_MODE (TREE_TYPE (decl)) == BLKmode) | |
12266a61 RK |
866 | error_with_decl (decl, |
867 | "data type of `%s' isn't suitable for a register"); | |
63ad61ed | 868 | else if (! HARD_REGNO_MODE_OK (reg_number, TYPE_MODE (TREE_TYPE (decl)))) |
12266a61 | 869 | error_with_decl (decl, |
63ad61ed | 870 | "register specified for `%s' isn't suitable for data type"); |
79e68feb | 871 | /* Now handle properly declared static register variables. */ |
63ad61ed | 872 | else |
79e68feb RS |
873 | { |
874 | int nregs; | |
12266a61 | 875 | |
e3406b2a | 876 | if (DECL_INITIAL (decl) != 0 && TREE_STATIC (decl)) |
79e68feb RS |
877 | { |
878 | DECL_INITIAL (decl) = 0; | |
879 | error ("global register variable has initial value"); | |
880 | } | |
79e68feb RS |
881 | if (TREE_THIS_VOLATILE (decl)) |
882 | warning ("volatile register variables don't work as you might wish"); | |
31e4b1c0 RK |
883 | |
884 | /* If the user specified one of the eliminables registers here, | |
885 | e.g., FRAME_POINTER_REGNUM, we don't want to get this variable | |
3ada20ee RH |
886 | confused with that register and be eliminated. This usage is |
887 | somewhat suspect... */ | |
888 | ||
889 | SET_DECL_RTL (decl, gen_rtx_raw_REG (DECL_MODE (decl), reg_number)); | |
890 | ORIGINAL_REGNO (DECL_RTL (decl)) = reg_number; | |
79e68feb RS |
891 | REG_USERVAR_P (DECL_RTL (decl)) = 1; |
892 | ||
6c418184 | 893 | if (TREE_STATIC (decl)) |
79e68feb | 894 | { |
ad800eb1 RK |
895 | /* Make this register global, so not usable for anything |
896 | else. */ | |
1cb36a98 RH |
897 | #ifdef ASM_DECLARE_REGISTER_GLOBAL |
898 | ASM_DECLARE_REGISTER_GLOBAL (asm_out_file, decl, reg_number, name); | |
899 | #endif | |
79e68feb RS |
900 | nregs = HARD_REGNO_NREGS (reg_number, DECL_MODE (decl)); |
901 | while (nregs > 0) | |
ad800eb1 | 902 | globalize_reg (reg_number + --nregs); |
79e68feb | 903 | } |
79e68feb | 904 | |
63ad61ed ZW |
905 | /* As a register variable, it has no section. */ |
906 | return; | |
907 | } | |
908 | } | |
0a5152d0 | 909 | |
63ad61ed ZW |
910 | /* Now handle ordinary static variables and functions (in memory). |
911 | Also handle vars declared register invalidly. */ | |
912 | ||
913 | if (reg_number >= 0 || reg_number == -3) | |
914 | error_with_decl (decl, | |
915 | "register name given for non-register variable `%s'"); | |
916 | ||
917 | /* Specifying a section attribute on a variable forces it into a | |
2d76cb1a | 918 | non-.bss section, and thus it cannot be common. */ |
63ad61ed ZW |
919 | if (TREE_CODE (decl) == VAR_DECL |
920 | && DECL_SECTION_NAME (decl) != NULL_TREE | |
921 | && DECL_INITIAL (decl) == NULL_TREE | |
922 | && DECL_COMMON (decl)) | |
923 | DECL_COMMON (decl) = 0; | |
924 | ||
5ff225fc MM |
925 | /* Variables can't be both common and weak. */ |
926 | if (TREE_CODE (decl) == VAR_DECL && DECL_WEAK (decl)) | |
927 | DECL_COMMON (decl) = 0; | |
928 | ||
63ad61ed ZW |
929 | /* Can't use just the variable's own name for a variable |
930 | whose scope is less than the whole file, unless it's a member | |
931 | of a local class (which will already be unambiguous). | |
932 | Concatenate a distinguishing number. */ | |
933 | if (!top_level && !TREE_PUBLIC (decl) | |
934 | && ! (DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl))) | |
60080880 JJ |
935 | && asmspec == 0 |
936 | && name == IDENTIFIER_POINTER (DECL_NAME (decl))) | |
63ad61ed ZW |
937 | { |
938 | char *label; | |
37a08a29 | 939 | |
63ad61ed ZW |
940 | ASM_FORMAT_PRIVATE_NAME (label, name, var_labelno); |
941 | var_labelno++; | |
942 | new_name = label; | |
943 | } | |
76095e2f | 944 | |
63ad61ed | 945 | if (name != new_name) |
ff8f4401 | 946 | { |
92643fea | 947 | SET_DECL_ASSEMBLER_NAME (decl, get_identifier (new_name)); |
63ad61ed ZW |
948 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); |
949 | } | |
d9525bec | 950 | |
63ad61ed | 951 | /* If this variable is to be treated as volatile, show its |
6d2f8887 | 952 | tree node has side effects. */ |
63ad61ed ZW |
953 | if ((flag_volatile_global && TREE_CODE (decl) == VAR_DECL |
954 | && TREE_PUBLIC (decl)) | |
955 | || ((flag_volatile_static && TREE_CODE (decl) == VAR_DECL | |
956 | && (TREE_PUBLIC (decl) || TREE_STATIC (decl))))) | |
957 | TREE_SIDE_EFFECTS (decl) = 1; | |
958 | ||
abde42f7 JH |
959 | x = gen_rtx_MEM (DECL_MODE (decl), gen_rtx_SYMBOL_REF (Pmode, name)); |
960 | SYMBOL_REF_WEAK (XEXP (x, 0)) = DECL_WEAK (decl); | |
63ad61ed | 961 | if (TREE_CODE (decl) != FUNCTION_DECL) |
abde42f7 JH |
962 | set_mem_attributes (x, decl, 1); |
963 | SET_DECL_RTL (decl, x); | |
63ad61ed ZW |
964 | |
965 | /* Optionally set flags or add text to the name to record information | |
966 | such as that it is a function name. | |
967 | If the name is changed, the macro ASM_OUTPUT_LABELREF | |
968 | will have to know how to strip this information. */ | |
fb49053f | 969 | (* targetm.encode_section_info) (decl, true); |
79e68feb | 970 | } |
4724d87a RS |
971 | |
972 | /* Make the rtl for variable VAR be volatile. | |
973 | Use this only for static variables. */ | |
974 | ||
fcbaecc6 | 975 | void |
4724d87a RS |
976 | make_var_volatile (var) |
977 | tree var; | |
978 | { | |
979 | if (GET_CODE (DECL_RTL (var)) != MEM) | |
980 | abort (); | |
981 | ||
982 | MEM_VOLATILE_P (DECL_RTL (var)) = 1; | |
983 | } | |
79e68feb | 984 | \f |
d447ec6f RS |
985 | /* Output alignment directive to align for constant expression EXP. */ |
986 | ||
987 | void | |
988 | assemble_constant_align (exp) | |
989 | tree exp; | |
990 | { | |
991 | int align; | |
992 | ||
993 | /* Align the location counter as required by EXP's data type. */ | |
994 | align = TYPE_ALIGN (TREE_TYPE (exp)); | |
995 | #ifdef CONSTANT_ALIGNMENT | |
996 | align = CONSTANT_ALIGNMENT (exp, align); | |
997 | #endif | |
998 | ||
999 | if (align > BITS_PER_UNIT) | |
91ea4f8d KG |
1000 | { |
1001 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT)); | |
1002 | } | |
d447ec6f RS |
1003 | } |
1004 | ||
79e68feb RS |
1005 | /* Output a string of literal assembler code |
1006 | for an `asm' keyword used between functions. */ | |
1007 | ||
1008 | void | |
1009 | assemble_asm (string) | |
1010 | tree string; | |
1011 | { | |
1012 | app_enable (); | |
1013 | ||
1014 | if (TREE_CODE (string) == ADDR_EXPR) | |
1015 | string = TREE_OPERAND (string, 0); | |
1016 | ||
1017 | fprintf (asm_out_file, "\t%s\n", TREE_STRING_POINTER (string)); | |
1018 | } | |
1019 | ||
2cc07db4 RH |
1020 | /* Record an element in the table of global destructors. SYMBOL is |
1021 | a SYMBOL_REF of the function to be called; PRIORITY is a number | |
1022 | between 0 and MAX_INIT_PRIORITY. */ | |
79e68feb RS |
1023 | |
1024 | void | |
2cc07db4 | 1025 | default_stabs_asm_out_destructor (symbol, priority) |
47907859 | 1026 | rtx symbol; |
2cc07db4 | 1027 | int priority ATTRIBUTE_UNUSED; |
79e68feb | 1028 | { |
2cc07db4 RH |
1029 | /* Tell GNU LD that this is part of the static destructor set. |
1030 | This will work for any system that uses stabs, most usefully | |
1031 | aout systems. */ | |
1032 | fprintf (asm_out_file, "%s\"___DTOR_LIST__\",22,0,0,", ASM_STABS_OP); | |
1033 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
1034 | fputc ('\n', asm_out_file); | |
1035 | } | |
47907859 | 1036 | |
2cc07db4 RH |
1037 | void |
1038 | default_named_section_asm_out_destructor (symbol, priority) | |
1039 | rtx symbol; | |
1040 | int priority; | |
1041 | { | |
1042 | const char *section = ".dtors"; | |
1043 | char buf[16]; | |
47907859 | 1044 | |
6d2f8887 | 1045 | /* ??? This only works reliably with the GNU linker. */ |
2cc07db4 | 1046 | if (priority != DEFAULT_INIT_PRIORITY) |
47907859 | 1047 | { |
47907859 RH |
1048 | sprintf (buf, ".dtors.%.5u", |
1049 | /* Invert the numbering so the linker puts us in the proper | |
1050 | order; constructors are run from right to left, and the | |
1051 | linker sorts in increasing order. */ | |
1052 | MAX_INIT_PRIORITY - priority); | |
2cc07db4 | 1053 | section = buf; |
47907859 RH |
1054 | } |
1055 | ||
715bdd29 RH |
1056 | named_section_flags (section, SECTION_WRITE); |
1057 | assemble_align (POINTER_SIZE); | |
c8af3574 | 1058 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); |
2cc07db4 RH |
1059 | } |
1060 | ||
1061 | #ifdef DTORS_SECTION_ASM_OP | |
1062 | void | |
1063 | dtors_section () | |
1064 | { | |
1065 | if (in_section != in_dtors) | |
79e68feb | 1066 | { |
2cc07db4 RH |
1067 | in_section = in_dtors; |
1068 | fputs (DTORS_SECTION_ASM_OP, asm_out_file); | |
79e68feb RS |
1069 | fputc ('\n', asm_out_file); |
1070 | } | |
79e68feb RS |
1071 | } |
1072 | ||
2cc07db4 RH |
1073 | void |
1074 | default_dtor_section_asm_out_destructor (symbol, priority) | |
1075 | rtx symbol; | |
1076 | int priority ATTRIBUTE_UNUSED; | |
1077 | { | |
1078 | dtors_section (); | |
c8af3574 RH |
1079 | assemble_align (POINTER_SIZE); |
1080 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 RH |
1081 | } |
1082 | #endif | |
1083 | ||
79e68feb RS |
1084 | /* Likewise for global constructors. */ |
1085 | ||
1086 | void | |
2cc07db4 | 1087 | default_stabs_asm_out_constructor (symbol, priority) |
47907859 | 1088 | rtx symbol; |
2cc07db4 | 1089 | int priority ATTRIBUTE_UNUSED; |
79e68feb | 1090 | { |
2cc07db4 RH |
1091 | /* Tell GNU LD that this is part of the static destructor set. |
1092 | This will work for any system that uses stabs, most usefully | |
1093 | aout systems. */ | |
1094 | fprintf (asm_out_file, "%s\"___CTOR_LIST__\",22,0,0,", ASM_STABS_OP); | |
1095 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
1096 | fputc ('\n', asm_out_file); | |
1097 | } | |
47907859 | 1098 | |
2cc07db4 RH |
1099 | void |
1100 | default_named_section_asm_out_constructor (symbol, priority) | |
1101 | rtx symbol; | |
1102 | int priority; | |
1103 | { | |
1104 | const char *section = ".ctors"; | |
1105 | char buf[16]; | |
47907859 | 1106 | |
6d2f8887 | 1107 | /* ??? This only works reliably with the GNU linker. */ |
2cc07db4 | 1108 | if (priority != DEFAULT_INIT_PRIORITY) |
47907859 | 1109 | { |
47907859 RH |
1110 | sprintf (buf, ".ctors.%.5u", |
1111 | /* Invert the numbering so the linker puts us in the proper | |
1112 | order; constructors are run from right to left, and the | |
1113 | linker sorts in increasing order. */ | |
1114 | MAX_INIT_PRIORITY - priority); | |
2cc07db4 | 1115 | section = buf; |
47907859 RH |
1116 | } |
1117 | ||
715bdd29 | 1118 | named_section_flags (section, SECTION_WRITE); |
c8af3574 RH |
1119 | assemble_align (POINTER_SIZE); |
1120 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 RH |
1121 | } |
1122 | ||
1123 | #ifdef CTORS_SECTION_ASM_OP | |
1124 | void | |
1125 | ctors_section () | |
1126 | { | |
1127 | if (in_section != in_ctors) | |
79e68feb | 1128 | { |
2cc07db4 RH |
1129 | in_section = in_ctors; |
1130 | fputs (CTORS_SECTION_ASM_OP, asm_out_file); | |
79e68feb RS |
1131 | fputc ('\n', asm_out_file); |
1132 | } | |
79e68feb | 1133 | } |
2cc07db4 RH |
1134 | |
1135 | void | |
1136 | default_ctor_section_asm_out_constructor (symbol, priority) | |
1137 | rtx symbol; | |
1138 | int priority ATTRIBUTE_UNUSED; | |
1139 | { | |
1140 | ctors_section (); | |
c8af3574 RH |
1141 | assemble_align (POINTER_SIZE); |
1142 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 RH |
1143 | } |
1144 | #endif | |
79e68feb | 1145 | \f |
97adc6ed ILT |
1146 | /* CONSTANT_POOL_BEFORE_FUNCTION may be defined as an expression with |
1147 | a non-zero value if the constant pool should be output before the | |
1148 | start of the function, or a zero value if the pool should output | |
1149 | after the end of the function. The default is to put it before the | |
1150 | start. */ | |
1151 | ||
1152 | #ifndef CONSTANT_POOL_BEFORE_FUNCTION | |
1153 | #define CONSTANT_POOL_BEFORE_FUNCTION 1 | |
1154 | #endif | |
1155 | ||
79e68feb RS |
1156 | /* Output assembler code for the constant pool of a function and associated |
1157 | with defining the name of the function. DECL describes the function. | |
1158 | NAME is the function's name. For the constant pool, we use the current | |
1159 | constant pool data. */ | |
1160 | ||
1161 | void | |
1162 | assemble_start_function (decl, fnname) | |
1163 | tree decl; | |
3cce094d | 1164 | const char *fnname; |
79e68feb RS |
1165 | { |
1166 | int align; | |
1167 | ||
1168 | /* The following code does not need preprocessing in the assembler. */ | |
1169 | ||
1170 | app_disable (); | |
1171 | ||
97adc6ed ILT |
1172 | if (CONSTANT_POOL_BEFORE_FUNCTION) |
1173 | output_constant_pool (fnname, decl); | |
79e68feb | 1174 | |
1b18fc2c | 1175 | resolve_unique_section (decl, 0, flag_function_sections); |
4d1065ed | 1176 | function_section (decl); |
79e68feb RS |
1177 | |
1178 | /* Tell assembler to move to target machine's alignment for functions. */ | |
1179 | align = floor_log2 (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
1180 | if (align > 0) | |
91ea4f8d KG |
1181 | { |
1182 | ASM_OUTPUT_ALIGN (asm_out_file, align); | |
1183 | } | |
79e68feb | 1184 | |
efa3896a GK |
1185 | /* Handle a user-specified function alignment. |
1186 | Note that we still need to align to FUNCTION_BOUNDARY, as above, | |
1187 | because ASM_OUTPUT_MAX_SKIP_ALIGN might not do any alignment at all. */ | |
194734e9 JH |
1188 | if (align_functions_log > align |
1189 | && cfun->function_frequency != FUNCTION_FREQUENCY_UNLIKELY_EXECUTED) | |
efa3896a GK |
1190 | { |
1191 | #ifdef ASM_OUTPUT_MAX_SKIP_ALIGN | |
46f9491e | 1192 | ASM_OUTPUT_MAX_SKIP_ALIGN (asm_out_file, |
c26fbbca | 1193 | align_functions_log, align_functions - 1); |
efa3896a GK |
1194 | #else |
1195 | ASM_OUTPUT_ALIGN (asm_out_file, align_functions_log); | |
1196 | #endif | |
1197 | } | |
1198 | ||
79e68feb RS |
1199 | #ifdef ASM_OUTPUT_FUNCTION_PREFIX |
1200 | ASM_OUTPUT_FUNCTION_PREFIX (asm_out_file, fnname); | |
1201 | #endif | |
1202 | ||
653e276c | 1203 | (*debug_hooks->begin_function) (decl); |
79e68feb RS |
1204 | |
1205 | /* Make function name accessible from other files, if appropriate. */ | |
1206 | ||
1207 | if (TREE_PUBLIC (decl)) | |
1208 | { | |
ee830309 | 1209 | if (! first_global_object_name) |
06bb02f7 | 1210 | { |
ec940faa | 1211 | const char *p; |
3b304f5b ZW |
1212 | char *name; |
1213 | ||
772c5265 | 1214 | p = (* targetm.strip_name_encoding) (fnname); |
3b304f5b ZW |
1215 | name = permalloc (strlen (p) + 1); |
1216 | strcpy (name, p); | |
ee830309 JM |
1217 | |
1218 | if (! DECL_WEAK (decl) && ! DECL_ONE_ONLY (decl)) | |
3b304f5b | 1219 | first_global_object_name = name; |
ee830309 | 1220 | else |
3b304f5b | 1221 | weak_global_object_name = name; |
06bb02f7 RK |
1222 | } |
1223 | ||
19c5b1cf | 1224 | globalize_decl (decl); |
b14707c3 RH |
1225 | |
1226 | maybe_assemble_visibility (decl); | |
79e68feb RS |
1227 | } |
1228 | ||
1229 | /* Do any machine/system dependent processing of the function name */ | |
8bd16853 | 1230 | #ifdef ASM_DECLARE_FUNCTION_NAME |
b93a436e | 1231 | ASM_DECLARE_FUNCTION_NAME (asm_out_file, fnname, current_function_decl); |
8bd16853 | 1232 | #else |
b93a436e JL |
1233 | /* Standard thing is just output label for the function. */ |
1234 | ASM_OUTPUT_LABEL (asm_out_file, fnname); | |
79e68feb RS |
1235 | #endif /* ASM_DECLARE_FUNCTION_NAME */ |
1236 | } | |
1237 | ||
1238 | /* Output assembler code associated with defining the size of the | |
1239 | function. DECL describes the function. NAME is the function's name. */ | |
1240 | ||
1241 | void | |
1242 | assemble_end_function (decl, fnname) | |
1243 | tree decl; | |
d9bba9c3 | 1244 | const char *fnname; |
79e68feb RS |
1245 | { |
1246 | #ifdef ASM_DECLARE_FUNCTION_SIZE | |
1247 | ASM_DECLARE_FUNCTION_SIZE (asm_out_file, fnname, decl); | |
1248 | #endif | |
97adc6ed | 1249 | if (! CONSTANT_POOL_BEFORE_FUNCTION) |
83488369 RK |
1250 | { |
1251 | output_constant_pool (fnname, decl); | |
1252 | function_section (decl); /* need to switch back */ | |
1253 | } | |
8839fca4 ILT |
1254 | |
1255 | /* Output any constants which should appear after the function. */ | |
1256 | output_after_function_constants (); | |
79e68feb RS |
1257 | } |
1258 | \f | |
1259 | /* Assemble code to leave SIZE bytes of zeros. */ | |
1260 | ||
1261 | void | |
1262 | assemble_zeros (size) | |
1263 | int size; | |
1264 | { | |
3c350eb3 CB |
1265 | /* Do no output if -fsyntax-only. */ |
1266 | if (flag_syntax_only) | |
1267 | return; | |
1268 | ||
79e68feb RS |
1269 | #ifdef ASM_NO_SKIP_IN_TEXT |
1270 | /* The `space' pseudo in the text section outputs nop insns rather than 0s, | |
1271 | so we must output 0s explicitly in the text section. */ | |
1272 | if (ASM_NO_SKIP_IN_TEXT && in_text_section ()) | |
1273 | { | |
1274 | int i; | |
c8af3574 RH |
1275 | for (i = 0; i < size; i++) |
1276 | assemble_integer (const0_rtx, 1, BITS_PER_UNIT, 1); | |
79e68feb RS |
1277 | } |
1278 | else | |
1279 | #endif | |
41fe4d9e | 1280 | if (size > 0) |
b93a436e | 1281 | ASM_OUTPUT_SKIP (asm_out_file, size); |
79e68feb RS |
1282 | } |
1283 | ||
a785e67e RS |
1284 | /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */ |
1285 | ||
1286 | void | |
1287 | assemble_align (align) | |
1288 | int align; | |
1289 | { | |
1290 | if (align > BITS_PER_UNIT) | |
91ea4f8d KG |
1291 | { |
1292 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT)); | |
1293 | } | |
a785e67e RS |
1294 | } |
1295 | ||
79e68feb RS |
1296 | /* Assemble a string constant with the specified C string as contents. */ |
1297 | ||
1298 | void | |
1299 | assemble_string (p, size) | |
9b3142b3 | 1300 | const char *p; |
79e68feb RS |
1301 | int size; |
1302 | { | |
79e68feb RS |
1303 | int pos = 0; |
1304 | int maximum = 2000; | |
1305 | ||
1306 | /* If the string is very long, split it up. */ | |
1307 | ||
1308 | while (pos < size) | |
1309 | { | |
1310 | int thissize = size - pos; | |
1311 | if (thissize > maximum) | |
1312 | thissize = maximum; | |
1313 | ||
b93a436e | 1314 | ASM_OUTPUT_ASCII (asm_out_file, p, thissize); |
79e68feb RS |
1315 | |
1316 | pos += thissize; | |
1317 | p += thissize; | |
1318 | } | |
1319 | } | |
69249c1b | 1320 | |
79e68feb | 1321 | \f |
b8694195 NC |
1322 | #if defined ASM_OUTPUT_ALIGNED_DECL_LOCAL |
1323 | #define ASM_EMIT_LOCAL(decl, name, size, rounded) \ | |
1324 | ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, decl, name, size, DECL_ALIGN (decl)) | |
1325 | #else | |
1326 | #if defined ASM_OUTPUT_ALIGNED_LOCAL | |
1327 | #define ASM_EMIT_LOCAL(decl, name, size, rounded) \ | |
1328 | ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, DECL_ALIGN (decl)) | |
1329 | #else | |
1330 | #define ASM_EMIT_LOCAL(decl, name, size, rounded) \ | |
1331 | ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded) | |
1332 | #endif | |
1333 | #endif | |
1334 | ||
1335 | #if defined ASM_OUTPUT_ALIGNED_BSS | |
1336 | #define ASM_EMIT_BSS(decl, name, size, rounded) \ | |
1337 | ASM_OUTPUT_ALIGNED_BSS (asm_out_file, decl, name, size, DECL_ALIGN (decl)) | |
1338 | #else | |
1339 | #if defined ASM_OUTPUT_BSS | |
1340 | #define ASM_EMIT_BSS(decl, name, size, rounded) \ | |
1341 | ASM_OUTPUT_BSS (asm_out_file, decl, name, size, rounded) | |
1342 | #else | |
1343 | #undef ASM_EMIT_BSS | |
1344 | #endif | |
1345 | #endif | |
1346 | ||
1347 | #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON | |
1348 | #define ASM_EMIT_COMMON(decl, name, size, rounded) \ | |
1349 | ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, decl, name, size, DECL_ALIGN (decl)) | |
1350 | #else | |
1351 | #if defined ASM_OUTPUT_ALIGNED_COMMON | |
1352 | #define ASM_EMIT_COMMON(decl, name, size, rounded) \ | |
1353 | ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, name, size, DECL_ALIGN (decl)) | |
1354 | #else | |
1355 | #define ASM_EMIT_COMMON(decl, name, size, rounded) \ | |
1356 | ASM_OUTPUT_COMMON (asm_out_file, name, size, rounded) | |
1357 | #endif | |
1358 | #endif | |
1359 | ||
1360 | static void | |
1361 | asm_emit_uninitialised (decl, name, size, rounded) | |
1362 | tree decl; | |
c26fbbca | 1363 | const char *name; |
05b13f59 | 1364 | int size ATTRIBUTE_UNUSED; |
95d75019 | 1365 | int rounded ATTRIBUTE_UNUSED; |
b8694195 | 1366 | { |
a56e7c08 NC |
1367 | enum |
1368 | { | |
b8694195 NC |
1369 | asm_dest_common, |
1370 | asm_dest_bss, | |
1371 | asm_dest_local | |
1372 | } | |
1373 | destination = asm_dest_local; | |
46f9491e | 1374 | |
b8694195 NC |
1375 | if (TREE_PUBLIC (decl)) |
1376 | { | |
1377 | #if defined ASM_EMIT_BSS | |
1378 | if (! DECL_COMMON (decl)) | |
1379 | destination = asm_dest_bss; | |
1380 | else | |
46f9491e | 1381 | #endif |
b8694195 NC |
1382 | destination = asm_dest_common; |
1383 | } | |
1384 | ||
1bd6476f RH |
1385 | if (destination == asm_dest_bss) |
1386 | globalize_decl (decl); | |
1b18fc2c | 1387 | resolve_unique_section (decl, 0, flag_data_sections); |
ecb0eece | 1388 | |
b8694195 NC |
1389 | if (flag_shared_data) |
1390 | { | |
1391 | switch (destination) | |
1392 | { | |
1393 | #ifdef ASM_OUTPUT_SHARED_BSS | |
1394 | case asm_dest_bss: | |
1395 | ASM_OUTPUT_SHARED_BSS (asm_out_file, decl, name, size, rounded); | |
1396 | return; | |
1397 | #endif | |
1398 | #ifdef ASM_OUTPUT_SHARED_COMMON | |
1399 | case asm_dest_common: | |
1400 | ASM_OUTPUT_SHARED_COMMON (asm_out_file, name, size, rounded); | |
1401 | return; | |
1402 | #endif | |
1403 | #ifdef ASM_OUTPUT_SHARED_LOCAL | |
1404 | case asm_dest_local: | |
1405 | ASM_OUTPUT_SHARED_LOCAL (asm_out_file, name, size, rounded); | |
1406 | return; | |
1407 | #endif | |
1408 | default: | |
1409 | break; | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | switch (destination) | |
1414 | { | |
1415 | #ifdef ASM_EMIT_BSS | |
1416 | case asm_dest_bss: | |
1417 | ASM_EMIT_BSS (decl, name, size, rounded); | |
1418 | break; | |
1419 | #endif | |
1420 | case asm_dest_common: | |
1421 | ASM_EMIT_COMMON (decl, name, size, rounded); | |
1422 | break; | |
1423 | case asm_dest_local: | |
1424 | ASM_EMIT_LOCAL (decl, name, size, rounded); | |
1425 | break; | |
1426 | default: | |
1427 | abort (); | |
1428 | } | |
1429 | ||
1430 | return; | |
1431 | } | |
1432 | ||
79e68feb RS |
1433 | /* Assemble everything that is needed for a variable or function declaration. |
1434 | Not used for automatic variables, and not used for function definitions. | |
1435 | Should not be called for variables of incomplete structure type. | |
1436 | ||
1437 | TOP_LEVEL is nonzero if this variable has file scope. | |
1438 | AT_END is nonzero if this is the special handling, at end of compilation, | |
ff8f4401 RS |
1439 | to define things that have had only tentative definitions. |
1440 | DONT_OUTPUT_DATA if nonzero means don't actually output the | |
1441 | initial value (that will be done by the caller). */ | |
79e68feb RS |
1442 | |
1443 | void | |
ff8f4401 | 1444 | assemble_variable (decl, top_level, at_end, dont_output_data) |
79e68feb | 1445 | tree decl; |
c84e2712 | 1446 | int top_level ATTRIBUTE_UNUSED; |
95d75019 | 1447 | int at_end ATTRIBUTE_UNUSED; |
5a13eaa4 | 1448 | int dont_output_data; |
79e68feb | 1449 | { |
b3694847 | 1450 | const char *name; |
f8344bea | 1451 | unsigned int align; |
79e68feb | 1452 | int reloc = 0; |
17eee61c | 1453 | rtx decl_rtl; |
79e68feb | 1454 | |
cbed4565 RS |
1455 | last_assemble_variable_decl = 0; |
1456 | ||
d36d70cc | 1457 | /* Normally no need to say anything here for external references, |
9faa82d8 | 1458 | since assemble_external is called by the language-specific code |
d36d70cc | 1459 | when a declaration is first seen. */ |
79e68feb | 1460 | |
44fe2e80 | 1461 | if (DECL_EXTERNAL (decl)) |
79e68feb RS |
1462 | return; |
1463 | ||
1464 | /* Output no assembler code for a function declaration. | |
1465 | Only definitions of functions output anything. */ | |
1466 | ||
1467 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
1468 | return; | |
1469 | ||
3914abb4 NB |
1470 | /* Do nothing for global register variables. */ |
1471 | if (DECL_RTL_SET_P (decl) && GET_CODE (DECL_RTL (decl)) == REG) | |
1472 | { | |
1473 | TREE_ASM_WRITTEN (decl) = 1; | |
1474 | return; | |
1475 | } | |
1476 | ||
79e68feb RS |
1477 | /* If type was incomplete when the variable was declared, |
1478 | see if it is complete now. */ | |
1479 | ||
1480 | if (DECL_SIZE (decl) == 0) | |
1481 | layout_decl (decl, 0); | |
1482 | ||
1483 | /* Still incomplete => don't allocate it; treat the tentative defn | |
1484 | (which is what it must have been) as an `extern' reference. */ | |
1485 | ||
ff8f4401 | 1486 | if (!dont_output_data && DECL_SIZE (decl) == 0) |
79e68feb RS |
1487 | { |
1488 | error_with_file_and_line (DECL_SOURCE_FILE (decl), | |
1489 | DECL_SOURCE_LINE (decl), | |
ea80ee44 | 1490 | "storage size of `%s' isn't known", |
79e68feb | 1491 | IDENTIFIER_POINTER (DECL_NAME (decl))); |
1c1a7ba4 | 1492 | TREE_ASM_WRITTEN (decl) = 1; |
79e68feb RS |
1493 | return; |
1494 | } | |
1495 | ||
1496 | /* The first declaration of a variable that comes through this function | |
1497 | decides whether it is global (in C, has external linkage) | |
1498 | or local (in C, has internal linkage). So do nothing more | |
1499 | if this function has already run. */ | |
1500 | ||
1501 | if (TREE_ASM_WRITTEN (decl)) | |
1502 | return; | |
1503 | ||
fb49053f RH |
1504 | /* Make sure targetm.encode_section_info is invoked before we set |
1505 | ASM_WRITTEN. */ | |
17eee61c | 1506 | decl_rtl = DECL_RTL (decl); |
46f9491e | 1507 | |
79e68feb RS |
1508 | TREE_ASM_WRITTEN (decl) = 1; |
1509 | ||
3c350eb3 CB |
1510 | /* Do no output if -fsyntax-only. */ |
1511 | if (flag_syntax_only) | |
1512 | return; | |
1513 | ||
809d6575 | 1514 | app_disable (); |
79e68feb | 1515 | |
770ae6cc RK |
1516 | if (! dont_output_data |
1517 | && ! host_integerp (DECL_SIZE_UNIT (decl), 1)) | |
ff8f4401 | 1518 | { |
770ae6cc | 1519 | error_with_decl (decl, "size of variable `%s' is too large"); |
544f03b4 | 1520 | return; |
79e68feb RS |
1521 | } |
1522 | ||
17eee61c | 1523 | name = XSTR (XEXP (decl_rtl, 0), 0); |
f796d997 JM |
1524 | if (TREE_PUBLIC (decl) && DECL_NAME (decl) |
1525 | && ! first_global_object_name | |
1526 | && ! (DECL_COMMON (decl) && (DECL_INITIAL (decl) == 0 | |
1527 | || DECL_INITIAL (decl) == error_mark_node)) | |
1528 | && ! DECL_WEAK (decl) | |
1529 | && ! DECL_ONE_ONLY (decl)) | |
1530 | { | |
ec940faa | 1531 | const char *p; |
3b304f5b | 1532 | char *xname; |
f796d997 | 1533 | |
772c5265 | 1534 | p = (* targetm.strip_name_encoding) (name); |
3b304f5b ZW |
1535 | xname = permalloc (strlen (p) + 1); |
1536 | strcpy (xname, p); | |
1537 | first_global_object_name = xname; | |
f796d997 JM |
1538 | } |
1539 | ||
8a198bd2 JW |
1540 | /* Compute the alignment of this data. */ |
1541 | ||
1542 | align = DECL_ALIGN (decl); | |
1543 | ||
1544 | /* In the case for initialing an array whose length isn't specified, | |
1545 | where we have not yet been able to do the layout, | |
1546 | figure out the proper alignment now. */ | |
1547 | if (dont_output_data && DECL_SIZE (decl) == 0 | |
1548 | && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
1549 | align = MAX (align, TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl)))); | |
1550 | ||
1551 | /* Some object file formats have a maximum alignment which they support. | |
1552 | In particular, a.out format supports a maximum alignment of 4. */ | |
1553 | #ifndef MAX_OFILE_ALIGNMENT | |
1554 | #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT | |
1555 | #endif | |
1556 | if (align > MAX_OFILE_ALIGNMENT) | |
1557 | { | |
1558 | warning_with_decl (decl, | |
357351e5 | 1559 | "alignment of `%s' is greater than maximum object file alignment. Using %d", |
44ec7e59 | 1560 | MAX_OFILE_ALIGNMENT/BITS_PER_UNIT); |
8a198bd2 JW |
1561 | align = MAX_OFILE_ALIGNMENT; |
1562 | } | |
1563 | ||
1564 | /* On some machines, it is good to increase alignment sometimes. */ | |
51084e13 RH |
1565 | if (! DECL_USER_ALIGN (decl)) |
1566 | { | |
8a198bd2 | 1567 | #ifdef DATA_ALIGNMENT |
51084e13 | 1568 | align = DATA_ALIGNMENT (TREE_TYPE (decl), align); |
8a198bd2 JW |
1569 | #endif |
1570 | #ifdef CONSTANT_ALIGNMENT | |
51084e13 RH |
1571 | if (DECL_INITIAL (decl) != 0 && DECL_INITIAL (decl) != error_mark_node) |
1572 | align = CONSTANT_ALIGNMENT (DECL_INITIAL (decl), align); | |
8a198bd2 | 1573 | #endif |
51084e13 | 1574 | } |
8a198bd2 JW |
1575 | |
1576 | /* Reset the alignment in case we have made it tighter, so we can benefit | |
1577 | from it in get_pointer_alignment. */ | |
1578 | DECL_ALIGN (decl) = align; | |
c952ff4b | 1579 | set_mem_align (decl_rtl, align); |
8a198bd2 | 1580 | |
b14707c3 RH |
1581 | if (TREE_PUBLIC (decl)) |
1582 | maybe_assemble_visibility (decl); | |
1583 | ||
15409448 JM |
1584 | /* Output any data that we will need to use the address of. */ |
1585 | if (DECL_INITIAL (decl) == error_mark_node) | |
1586 | reloc = contains_pointers_p (TREE_TYPE (decl)) ? 3 : 0; | |
1587 | else if (DECL_INITIAL (decl)) | |
1588 | reloc = output_addressed_constants (DECL_INITIAL (decl)); | |
d88a8ff5 | 1589 | resolve_unique_section (decl, reloc, flag_data_sections); |
15409448 | 1590 | |
79e68feb RS |
1591 | /* Handle uninitialized definitions. */ |
1592 | ||
3d78f2e9 RH |
1593 | /* If the decl has been given an explicit section name, then it |
1594 | isn't common, and shouldn't be handled as such. */ | |
1595 | if (DECL_SECTION_NAME (decl) || dont_output_data) | |
1596 | ; | |
1597 | /* We don't implement common thread-local data at present. */ | |
1598 | else if (DECL_THREAD_LOCAL (decl)) | |
1599 | { | |
1600 | if (DECL_COMMON (decl)) | |
1601 | sorry ("thread-local COMMON data not implemented"); | |
1602 | } | |
1603 | #ifndef ASM_EMIT_BSS | |
1604 | /* If the target can't output uninitialized but not common global data | |
1605 | in .bss, then we have to use .data. */ | |
1606 | /* ??? We should handle .bss via select_section mechanisms rather than | |
1607 | via special target hooks. That would eliminate this special case. */ | |
1608 | else if (!DECL_COMMON (decl)) | |
1609 | ; | |
e5887033 | 1610 | #endif |
3d78f2e9 RH |
1611 | else if (DECL_INITIAL (decl) == 0 |
1612 | || DECL_INITIAL (decl) == error_mark_node | |
1613 | || (flag_zero_initialized_in_bss | |
1614 | && initializer_zerop (DECL_INITIAL (decl)))) | |
79e68feb | 1615 | { |
770ae6cc RK |
1616 | unsigned HOST_WIDE_INT size = tree_low_cst (DECL_SIZE_UNIT (decl), 1); |
1617 | unsigned HOST_WIDE_INT rounded = size; | |
79e68feb | 1618 | |
79e68feb RS |
1619 | /* Don't allocate zero bytes of common, |
1620 | since that means "undefined external" in the linker. */ | |
770ae6cc RK |
1621 | if (size == 0) |
1622 | rounded = 1; | |
1623 | ||
79e68feb RS |
1624 | /* Round size up to multiple of BIGGEST_ALIGNMENT bits |
1625 | so that each uninitialized object starts on such a boundary. */ | |
1626 | rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1; | |
1627 | rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT) | |
1628 | * (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); | |
46f9491e | 1629 | |
ec1bff50 HPN |
1630 | /* Don't continue this line--convex cc version 4.1 would lose. */ |
1631 | #if !defined(ASM_OUTPUT_ALIGNED_COMMON) && !defined(ASM_OUTPUT_ALIGNED_DECL_COMMON) && !defined(ASM_OUTPUT_ALIGNED_BSS) | |
4cf7705a | 1632 | if ((unsigned HOST_WIDE_INT) DECL_ALIGN (decl) / BITS_PER_UNIT > rounded) |
46f9491e | 1633 | warning_with_decl |
357351e5 | 1634 | (decl, "requested alignment for %s is greater than implemented alignment of %d",rounded); |
4bcfa7a8 | 1635 | #endif |
46f9491e | 1636 | |
b8694195 | 1637 | asm_emit_uninitialised (decl, name, size, rounded); |
e5887033 | 1638 | |
544f03b4 | 1639 | return; |
79e68feb RS |
1640 | } |
1641 | ||
e5887033 DE |
1642 | /* Handle initialized definitions. |
1643 | Also handle uninitialized global definitions if -fno-common and the | |
1644 | target doesn't support ASM_OUTPUT_BSS. */ | |
79e68feb RS |
1645 | |
1646 | /* First make the assembler name(s) global if appropriate. */ | |
1647 | if (TREE_PUBLIC (decl) && DECL_NAME (decl)) | |
19c5b1cf | 1648 | globalize_decl (decl); |
79e68feb | 1649 | |
f9da1f35 DE |
1650 | /* Switch to the appropriate section. */ |
1651 | variable_section (decl, reloc); | |
79e68feb | 1652 | |
a8e2f179 RS |
1653 | /* dbxout.c needs to know this. */ |
1654 | if (in_text_section ()) | |
1655 | DECL_IN_TEXT_SECTION (decl) = 1; | |
1656 | ||
8a198bd2 | 1657 | /* Output the alignment of this data. */ |
79e68feb | 1658 | if (align > BITS_PER_UNIT) |
91ea4f8d KG |
1659 | { |
1660 | ASM_OUTPUT_ALIGN (asm_out_file, | |
1661 | floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT)); | |
1662 | } | |
79e68feb RS |
1663 | |
1664 | /* Do any machine/system dependent processing of the object. */ | |
8bd16853 | 1665 | #ifdef ASM_DECLARE_OBJECT_NAME |
b93a436e JL |
1666 | last_assemble_variable_decl = decl; |
1667 | ASM_DECLARE_OBJECT_NAME (asm_out_file, name, decl); | |
8bd16853 | 1668 | #else |
b93a436e JL |
1669 | /* Standard thing is just output label for the object. */ |
1670 | ASM_OUTPUT_LABEL (asm_out_file, name); | |
79e68feb RS |
1671 | #endif /* ASM_DECLARE_OBJECT_NAME */ |
1672 | ||
ff8f4401 | 1673 | if (!dont_output_data) |
79e68feb | 1674 | { |
15409448 | 1675 | if (DECL_INITIAL (decl) && DECL_INITIAL (decl) != error_mark_node) |
ff8f4401 | 1676 | /* Output the actual data. */ |
770ae6cc | 1677 | output_constant (DECL_INITIAL (decl), |
c8af3574 RH |
1678 | tree_low_cst (DECL_SIZE_UNIT (decl), 1), |
1679 | align); | |
ff8f4401 RS |
1680 | else |
1681 | /* Leave space for it. */ | |
770ae6cc | 1682 | assemble_zeros (tree_low_cst (DECL_SIZE_UNIT (decl), 1)); |
79e68feb | 1683 | } |
79e68feb RS |
1684 | } |
1685 | ||
2e9effae RS |
1686 | /* Return 1 if type TYPE contains any pointers. */ |
1687 | ||
1688 | static int | |
1689 | contains_pointers_p (type) | |
1690 | tree type; | |
1691 | { | |
1692 | switch (TREE_CODE (type)) | |
1693 | { | |
1694 | case POINTER_TYPE: | |
1695 | case REFERENCE_TYPE: | |
1696 | /* I'm not sure whether OFFSET_TYPE needs this treatment, | |
1697 | so I'll play safe and return 1. */ | |
1698 | case OFFSET_TYPE: | |
1699 | return 1; | |
1700 | ||
1701 | case RECORD_TYPE: | |
1702 | case UNION_TYPE: | |
1703 | case QUAL_UNION_TYPE: | |
1704 | { | |
1705 | tree fields; | |
1706 | /* For a type that has fields, see if the fields have pointers. */ | |
1707 | for (fields = TYPE_FIELDS (type); fields; fields = TREE_CHAIN (fields)) | |
ce49ea8a JM |
1708 | if (TREE_CODE (fields) == FIELD_DECL |
1709 | && contains_pointers_p (TREE_TYPE (fields))) | |
2e9effae RS |
1710 | return 1; |
1711 | return 0; | |
1712 | } | |
1713 | ||
1714 | case ARRAY_TYPE: | |
1715 | /* An array type contains pointers if its element type does. */ | |
1716 | return contains_pointers_p (TREE_TYPE (type)); | |
1717 | ||
1718 | default: | |
1719 | return 0; | |
1720 | } | |
1721 | } | |
1722 | ||
79e68feb | 1723 | /* Output something to declare an external symbol to the assembler. |
fff9e713 MT |
1724 | (Most assemblers don't need this, so we normally output nothing.) |
1725 | Do nothing if DECL is not external. */ | |
79e68feb RS |
1726 | |
1727 | void | |
1728 | assemble_external (decl) | |
91813b28 | 1729 | tree decl ATTRIBUTE_UNUSED; |
79e68feb | 1730 | { |
e6855a2d MM |
1731 | /* Because most platforms do not define ASM_OUTPUT_EXTERNAL, the |
1732 | main body of this code is only rarely exercised. To provide some | |
1733 | testing, on all platforms, we make sure that the ASM_OUT_FILE is | |
1734 | open. If it's not, we should not be calling this function. */ | |
1735 | if (!asm_out_file) | |
1736 | abort (); | |
1737 | ||
79e68feb | 1738 | #ifdef ASM_OUTPUT_EXTERNAL |
2f939d94 | 1739 | if (DECL_P (decl) && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl)) |
79e68feb | 1740 | { |
fff9e713 MT |
1741 | rtx rtl = DECL_RTL (decl); |
1742 | ||
1743 | if (GET_CODE (rtl) == MEM && GET_CODE (XEXP (rtl, 0)) == SYMBOL_REF | |
1744 | && ! SYMBOL_REF_USED (XEXP (rtl, 0))) | |
1745 | { | |
1746 | /* Some systems do require some output. */ | |
1747 | SYMBOL_REF_USED (XEXP (rtl, 0)) = 1; | |
1748 | ASM_OUTPUT_EXTERNAL (asm_out_file, decl, XSTR (XEXP (rtl, 0), 0)); | |
1749 | } | |
79e68feb RS |
1750 | } |
1751 | #endif | |
1752 | } | |
1753 | ||
1754 | /* Similar, for calling a library function FUN. */ | |
1755 | ||
1756 | void | |
1757 | assemble_external_libcall (fun) | |
c84e2712 | 1758 | rtx fun ATTRIBUTE_UNUSED; |
79e68feb RS |
1759 | { |
1760 | #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL | |
b93a436e JL |
1761 | /* Declare library function name external when first used, if nec. */ |
1762 | if (! SYMBOL_REF_USED (fun)) | |
79e68feb | 1763 | { |
b93a436e JL |
1764 | SYMBOL_REF_USED (fun) = 1; |
1765 | ASM_OUTPUT_EXTERNAL_LIBCALL (asm_out_file, fun); | |
79e68feb RS |
1766 | } |
1767 | #endif | |
1768 | } | |
1769 | ||
1770 | /* Declare the label NAME global. */ | |
1771 | ||
1772 | void | |
1773 | assemble_global (name) | |
e59f7d3d | 1774 | const char *name ATTRIBUTE_UNUSED; |
79e68feb RS |
1775 | { |
1776 | ASM_GLOBALIZE_LABEL (asm_out_file, name); | |
1777 | } | |
1778 | ||
1779 | /* Assemble a label named NAME. */ | |
1780 | ||
1781 | void | |
1782 | assemble_label (name) | |
d9bba9c3 | 1783 | const char *name; |
79e68feb | 1784 | { |
b93a436e | 1785 | ASM_OUTPUT_LABEL (asm_out_file, name); |
79e68feb RS |
1786 | } |
1787 | ||
1788 | /* Output to FILE a reference to the assembler name of a C-level name NAME. | |
1789 | If NAME starts with a *, the rest of NAME is output verbatim. | |
1790 | Otherwise NAME is transformed in an implementation-defined way | |
1791 | (usually by the addition of an underscore). | |
1792 | Many macros in the tm file are defined to call this function. */ | |
1793 | ||
1794 | void | |
1795 | assemble_name (file, name) | |
1796 | FILE *file; | |
ec940faa | 1797 | const char *name; |
79e68feb | 1798 | { |
ec940faa | 1799 | const char *real_name; |
a94dbf2c | 1800 | tree id; |
648fb7cf | 1801 | |
772c5265 | 1802 | real_name = (* targetm.strip_name_encoding) (name); |
87907387 | 1803 | |
a94dbf2c JM |
1804 | id = maybe_get_identifier (real_name); |
1805 | if (id) | |
1806 | TREE_SYMBOL_REFERENCED (id) = 1; | |
03e42132 | 1807 | |
79e68feb | 1808 | if (name[0] == '*') |
b93a436e | 1809 | fputs (&name[1], file); |
79e68feb | 1810 | else |
86aff125 | 1811 | ASM_OUTPUT_LABELREF (file, name); |
79e68feb RS |
1812 | } |
1813 | ||
1814 | /* Allocate SIZE bytes writable static space with a gensym name | |
1815 | and return an RTX to refer to its address. */ | |
1816 | ||
1817 | rtx | |
1818 | assemble_static_space (size) | |
1819 | int size; | |
1820 | { | |
1821 | char name[12]; | |
520a57c8 | 1822 | const char *namestring; |
79e68feb | 1823 | rtx x; |
79e68feb RS |
1824 | |
1825 | #if 0 | |
1826 | if (flag_shared_data) | |
1827 | data_section (); | |
1828 | #endif | |
1829 | ||
1830 | ASM_GENERATE_INTERNAL_LABEL (name, "LF", const_labelno); | |
1831 | ++const_labelno; | |
a8a05998 | 1832 | namestring = ggc_strdup (name); |
79e68feb | 1833 | |
b93a436e | 1834 | x = gen_rtx_SYMBOL_REF (Pmode, namestring); |
ca695ac9 | 1835 | |
e9a25f70 | 1836 | #ifdef ASM_OUTPUT_ALIGNED_DECL_LOCAL |
b93a436e JL |
1837 | ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, NULL_TREE, name, size, |
1838 | BIGGEST_ALIGNMENT); | |
e9a25f70 | 1839 | #else |
79e68feb | 1840 | #ifdef ASM_OUTPUT_ALIGNED_LOCAL |
b93a436e | 1841 | ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, BIGGEST_ALIGNMENT); |
79e68feb | 1842 | #else |
e016950d KG |
1843 | { |
1844 | /* Round size up to multiple of BIGGEST_ALIGNMENT bits | |
1845 | so that each uninitialized object starts on such a boundary. */ | |
2d76cb1a | 1846 | /* Variable `rounded' might or might not be used in ASM_OUTPUT_LOCAL. */ |
47c3ed98 KG |
1847 | int rounded ATTRIBUTE_UNUSED |
1848 | = ((size + (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1) | |
1849 | / (BIGGEST_ALIGNMENT / BITS_PER_UNIT) | |
1850 | * (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); | |
e016950d KG |
1851 | ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded); |
1852 | } | |
e9a25f70 | 1853 | #endif |
79e68feb RS |
1854 | #endif |
1855 | return x; | |
1856 | } | |
1857 | ||
1858 | /* Assemble the static constant template for function entry trampolines. | |
1859 | This is done at most once per compilation. | |
1860 | Returns an RTX for the address of the template. */ | |
1861 | ||
f0e969bd | 1862 | #ifdef TRAMPOLINE_TEMPLATE |
79e68feb RS |
1863 | rtx |
1864 | assemble_trampoline_template () | |
1865 | { | |
1866 | char label[256]; | |
fc608b03 | 1867 | const char *name; |
79e68feb RS |
1868 | int align; |
1869 | ||
37552631 | 1870 | /* By default, put trampoline templates in read-only data section. */ |
f49acdb4 | 1871 | |
37552631 RS |
1872 | #ifdef TRAMPOLINE_SECTION |
1873 | TRAMPOLINE_SECTION (); | |
1874 | #else | |
c8c29f85 | 1875 | readonly_data_section (); |
37552631 | 1876 | #endif |
f49acdb4 | 1877 | |
79e68feb | 1878 | /* Write the assembler code to define one. */ |
073b0524 | 1879 | align = floor_log2 (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT); |
79e68feb | 1880 | if (align > 0) |
91ea4f8d KG |
1881 | { |
1882 | ASM_OUTPUT_ALIGN (asm_out_file, align); | |
1883 | } | |
79e68feb RS |
1884 | |
1885 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LTRAMP", 0); | |
1886 | TRAMPOLINE_TEMPLATE (asm_out_file); | |
1887 | ||
1888 | /* Record the rtl to refer to it. */ | |
1889 | ASM_GENERATE_INTERNAL_LABEL (label, "LTRAMP", 0); | |
a8a05998 | 1890 | name = ggc_strdup (label); |
38a448ca | 1891 | return gen_rtx_SYMBOL_REF (Pmode, name); |
79e68feb | 1892 | } |
f0e969bd | 1893 | #endif |
79e68feb | 1894 | \f |
c8af3574 RH |
1895 | /* A and B are either alignments or offsets. Return the minimum alignment |
1896 | that may be assumed after adding the two together. */ | |
1897 | ||
1898 | static inline unsigned | |
1899 | min_align (a, b) | |
1900 | unsigned int a, b; | |
1901 | { | |
1902 | return (a | b) & -(a | b); | |
1903 | } | |
79e68feb | 1904 | |
301d03af RS |
1905 | /* Return the assembler directive for creating a given kind of integer |
1906 | object. SIZE is the number of bytes in the object and ALIGNED_P | |
1907 | indicates whether it is known to be aligned. Return NULL if the | |
1908 | assembly dialect has no such directive. | |
79e68feb | 1909 | |
301d03af RS |
1910 | The returned string should be printed at the start of a new line and |
1911 | be followed immediately by the object's initial value. */ | |
1912 | ||
1913 | const char * | |
1914 | integer_asm_op (size, aligned_p) | |
1915 | int size; | |
1916 | int aligned_p; | |
79e68feb | 1917 | { |
301d03af | 1918 | struct asm_int_op *ops; |
79e68feb | 1919 | |
301d03af RS |
1920 | if (aligned_p) |
1921 | ops = &targetm.asm_out.aligned_op; | |
c8af3574 | 1922 | else |
301d03af RS |
1923 | ops = &targetm.asm_out.unaligned_op; |
1924 | ||
1925 | switch (size) | |
c8af3574 | 1926 | { |
301d03af RS |
1927 | case 1: |
1928 | return targetm.asm_out.byte_op; | |
1929 | case 2: | |
1930 | return ops->hi; | |
1931 | case 4: | |
1932 | return ops->si; | |
1933 | case 8: | |
1934 | return ops->di; | |
1935 | case 16: | |
1936 | return ops->ti; | |
1937 | default: | |
1938 | return NULL; | |
1939 | } | |
1940 | } | |
c8af3574 | 1941 | |
301d03af RS |
1942 | /* Use directive OP to assemble an integer object X. Print OP at the |
1943 | start of the line, followed immediately by the value of X. */ | |
c8af3574 | 1944 | |
301d03af RS |
1945 | void |
1946 | assemble_integer_with_op (op, x) | |
1947 | const char *op; | |
1948 | rtx x; | |
1949 | { | |
1950 | fputs (op, asm_out_file); | |
1951 | output_addr_const (asm_out_file, x); | |
1952 | fputc ('\n', asm_out_file); | |
1953 | } | |
79e68feb | 1954 | |
301d03af | 1955 | /* The default implementation of the asm_out.integer target hook. */ |
79e68feb | 1956 | |
301d03af RS |
1957 | bool |
1958 | default_assemble_integer (x, size, aligned_p) | |
1959 | rtx x ATTRIBUTE_UNUSED; | |
1960 | unsigned int size ATTRIBUTE_UNUSED; | |
1961 | int aligned_p ATTRIBUTE_UNUSED; | |
1962 | { | |
1963 | const char *op = integer_asm_op (size, aligned_p); | |
1964 | return op && (assemble_integer_with_op (op, x), true); | |
1965 | } | |
79e68feb | 1966 | |
301d03af RS |
1967 | /* Assemble the integer constant X into an object of SIZE bytes. ALIGN is |
1968 | the alignment of the integer in bits. Return 1 if we were able to output | |
1969 | the constant, otherwise 0. If FORCE is non-zero, abort if we can't output | |
1970 | the constant. */ | |
79e68feb | 1971 | |
301d03af RS |
1972 | bool |
1973 | assemble_integer (x, size, align, force) | |
1974 | rtx x; | |
1975 | unsigned int size; | |
1976 | unsigned int align; | |
1977 | int force; | |
1978 | { | |
1979 | int aligned_p; | |
79e68feb | 1980 | |
301d03af | 1981 | aligned_p = (align >= MIN (size * BITS_PER_UNIT, BIGGEST_ALIGNMENT)); |
79e68feb | 1982 | |
301d03af RS |
1983 | /* See if the target hook can handle this kind of object. */ |
1984 | if ((*targetm.asm_out.integer) (x, size, aligned_p)) | |
1985 | return true; | |
79e68feb | 1986 | |
301d03af RS |
1987 | /* If the object is a multi-byte one, try splitting it up. Split |
1988 | it into words it if is multi-word, otherwise split it into bytes. */ | |
1989 | if (size > 1) | |
c8af3574 RH |
1990 | { |
1991 | enum machine_mode omode, imode; | |
301d03af RS |
1992 | unsigned int subalign; |
1993 | unsigned int subsize, i; | |
46f9491e | 1994 | |
301d03af RS |
1995 | subsize = size > UNITS_PER_WORD? UNITS_PER_WORD : 1; |
1996 | subalign = MIN (align, subsize * BITS_PER_UNIT); | |
1997 | omode = mode_for_size (subsize * BITS_PER_UNIT, MODE_INT, 0); | |
c8af3574 RH |
1998 | imode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0); |
1999 | ||
301d03af | 2000 | for (i = 0; i < size; i += subsize) |
c8af3574 | 2001 | { |
301d03af RS |
2002 | rtx partial = simplify_subreg (omode, x, imode, i); |
2003 | if (!partial || !assemble_integer (partial, subsize, subalign, 0)) | |
c8af3574 RH |
2004 | break; |
2005 | } | |
c8af3574 | 2006 | if (i == size) |
301d03af RS |
2007 | return true; |
2008 | ||
2009 | /* If we've printed some of it, but not all of it, there's no going | |
2010 | back now. */ | |
c8af3574 RH |
2011 | if (i > 0) |
2012 | abort (); | |
2013 | } | |
2014 | ||
79e68feb RS |
2015 | if (force) |
2016 | abort (); | |
2017 | ||
301d03af | 2018 | return false; |
79e68feb RS |
2019 | } |
2020 | \f | |
82af613f RH |
2021 | void |
2022 | assemble_real (d, mode, align) | |
2023 | REAL_VALUE_TYPE d; | |
2024 | enum machine_mode mode; | |
2025 | unsigned int align; | |
94aca342 | 2026 | { |
82af613f RH |
2027 | long data[4]; |
2028 | long l; | |
2029 | unsigned int nalign = min_align (align, 32); | |
79e68feb | 2030 | |
82af613f | 2031 | switch (BITS_PER_UNIT) |
79e68feb | 2032 | { |
82af613f RH |
2033 | case 8: |
2034 | switch (mode) | |
2035 | { | |
2036 | case SFmode: | |
2037 | REAL_VALUE_TO_TARGET_SINGLE (d, l); | |
2038 | assemble_integer (GEN_INT (l), 4, align, 1); | |
2039 | break; | |
2040 | case DFmode: | |
2041 | REAL_VALUE_TO_TARGET_DOUBLE (d, data); | |
2042 | assemble_integer (GEN_INT (data[0]), 4, align, 1); | |
2043 | assemble_integer (GEN_INT (data[1]), 4, nalign, 1); | |
2044 | break; | |
2045 | case XFmode: | |
2046 | REAL_VALUE_TO_TARGET_LONG_DOUBLE (d, data); | |
2047 | assemble_integer (GEN_INT (data[0]), 4, align, 1); | |
2048 | assemble_integer (GEN_INT (data[1]), 4, nalign, 1); | |
2049 | assemble_integer (GEN_INT (data[2]), 4, nalign, 1); | |
2050 | break; | |
2051 | case TFmode: | |
2052 | REAL_VALUE_TO_TARGET_LONG_DOUBLE (d, data); | |
2053 | assemble_integer (GEN_INT (data[0]), 4, align, 1); | |
2054 | assemble_integer (GEN_INT (data[1]), 4, nalign, 1); | |
2055 | assemble_integer (GEN_INT (data[2]), 4, nalign, 1); | |
2056 | assemble_integer (GEN_INT (data[3]), 4, nalign, 1); | |
2057 | break; | |
2058 | default: | |
2059 | abort (); | |
2060 | } | |
79e68feb | 2061 | break; |
79e68feb | 2062 | |
82af613f RH |
2063 | case 16: |
2064 | switch (mode) | |
2065 | { | |
2066 | case HFmode: | |
2067 | REAL_VALUE_TO_TARGET_SINGLE (d, l); | |
2068 | assemble_integer (GEN_INT (l), 2, align, 1); | |
2069 | break; | |
2070 | case TQFmode: | |
2071 | REAL_VALUE_TO_TARGET_DOUBLE (d, data); | |
2072 | assemble_integer (GEN_INT (data[0]), 2, align, 1); | |
2073 | assemble_integer (GEN_INT (data[1]), 1, nalign, 1); | |
2074 | break; | |
2075 | default: | |
2076 | abort (); | |
2077 | } | |
79e68feb | 2078 | break; |
79e68feb | 2079 | |
82af613f RH |
2080 | case 32: |
2081 | switch (mode) | |
2082 | { | |
2083 | case QFmode: | |
2084 | REAL_VALUE_TO_TARGET_SINGLE (d, l); | |
2085 | assemble_integer (GEN_INT (l), 1, align, 1); | |
2086 | break; | |
2087 | case HFmode: | |
2088 | REAL_VALUE_TO_TARGET_DOUBLE (d, data); | |
2089 | assemble_integer (GEN_INT (data[0]), 1, align, 1); | |
2090 | assemble_integer (GEN_INT (data[1]), 1, nalign, 1); | |
2091 | break; | |
2092 | default: | |
2093 | abort (); | |
2094 | } | |
79e68feb | 2095 | break; |
79e68feb RS |
2096 | |
2097 | default: | |
2098 | abort (); | |
2099 | } | |
94aca342 | 2100 | } |
79e68feb | 2101 | \f |
79e68feb RS |
2102 | /* Given an expression EXP with a constant value, |
2103 | reduce it to the sum of an assembler symbol and an integer. | |
2104 | Store them both in the structure *VALUE. | |
2105 | Abort if EXP does not reduce. */ | |
2106 | ||
2107 | struct addr_const | |
2108 | { | |
2109 | rtx base; | |
fb351073 | 2110 | HOST_WIDE_INT offset; |
79e68feb RS |
2111 | }; |
2112 | ||
2113 | static void | |
2114 | decode_addr_const (exp, value) | |
2115 | tree exp; | |
2116 | struct addr_const *value; | |
2117 | { | |
b3694847 SS |
2118 | tree target = TREE_OPERAND (exp, 0); |
2119 | int offset = 0; | |
2120 | rtx x; | |
79e68feb RS |
2121 | |
2122 | while (1) | |
2123 | { | |
2124 | if (TREE_CODE (target) == COMPONENT_REF | |
770ae6cc | 2125 | && host_integerp (byte_position (TREE_OPERAND (target, 1)), 0)) |
665f2503 | 2126 | |
79e68feb | 2127 | { |
770ae6cc | 2128 | offset += int_byte_position (TREE_OPERAND (target, 1)); |
79e68feb RS |
2129 | target = TREE_OPERAND (target, 0); |
2130 | } | |
b4e3fabb RK |
2131 | else if (TREE_CODE (target) == ARRAY_REF |
2132 | || TREE_CODE (target) == ARRAY_RANGE_REF) | |
79e68feb | 2133 | { |
770ae6cc RK |
2134 | offset += (tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (target)), 1) |
2135 | * tree_low_cst (TREE_OPERAND (target, 1), 0)); | |
79e68feb RS |
2136 | target = TREE_OPERAND (target, 0); |
2137 | } | |
2138 | else | |
2139 | break; | |
2140 | } | |
2141 | ||
2142 | switch (TREE_CODE (target)) | |
2143 | { | |
2144 | case VAR_DECL: | |
2145 | case FUNCTION_DECL: | |
2146 | x = DECL_RTL (target); | |
2147 | break; | |
2148 | ||
2149 | case LABEL_DECL: | |
b93a436e JL |
2150 | x = gen_rtx_MEM (FUNCTION_MODE, |
2151 | gen_rtx_LABEL_REF (VOIDmode, | |
2152 | label_rtx (TREE_OPERAND (exp, 0)))); | |
79e68feb RS |
2153 | break; |
2154 | ||
2155 | case REAL_CST: | |
2156 | case STRING_CST: | |
2157 | case COMPLEX_CST: | |
2158 | case CONSTRUCTOR: | |
2cf55b55 | 2159 | case INTEGER_CST: |
44e3910a RK |
2160 | /* This constant should have been output already, but we can't simply |
2161 | use TREE_CST_RTL since INTEGER_CST doesn't have one. */ | |
2162 | x = output_constant_def (target, 1); | |
79e68feb RS |
2163 | break; |
2164 | ||
2165 | default: | |
2166 | abort (); | |
2167 | } | |
2168 | ||
b93a436e JL |
2169 | if (GET_CODE (x) != MEM) |
2170 | abort (); | |
2171 | x = XEXP (x, 0); | |
79e68feb RS |
2172 | |
2173 | value->base = x; | |
2174 | value->offset = offset; | |
2175 | } | |
2176 | \f | |
69ef87e2 AH |
2177 | /* We do RTX_UNSPEC + XINT (blah), so nothing can go after RTX_UNSPEC. */ |
2178 | enum kind { RTX_UNKNOWN, RTX_DOUBLE, RTX_INT, RTX_VECTOR, RTX_UNSPEC }; | |
1f8f4a0b MM |
2179 | struct rtx_const |
2180 | { | |
9612ab65 ZW |
2181 | ENUM_BITFIELD(kind) kind : 16; |
2182 | ENUM_BITFIELD(machine_mode) mode : 16; | |
1f8f4a0b | 2183 | union { |
b216cd4a | 2184 | REAL_VALUE_TYPE du; |
1f8f4a0b MM |
2185 | struct addr_const addr; |
2186 | struct {HOST_WIDE_INT high, low;} di; | |
69ef87e2 AH |
2187 | |
2188 | /* The max vector size we have is 8 wide. This should be enough. */ | |
2189 | HOST_WIDE_INT veclo[16]; | |
2190 | HOST_WIDE_INT vechi[16]; | |
1f8f4a0b MM |
2191 | } un; |
2192 | }; | |
2193 | ||
79e68feb RS |
2194 | /* Uniquize all constants that appear in memory. |
2195 | Each constant in memory thus far output is recorded | |
2196 | in `const_hash_table' with a `struct constant_descriptor' | |
2197 | that contains a polish representation of the value of | |
2198 | the constant. | |
2199 | ||
2200 | We cannot store the trees in the hash table | |
2201 | because the trees may be temporary. */ | |
2202 | ||
2203 | struct constant_descriptor | |
2204 | { | |
2205 | struct constant_descriptor *next; | |
520a57c8 | 2206 | const char *label; |
14a774a9 | 2207 | rtx rtl; |
37357796 | 2208 | /* Make sure the data is reasonably aligned. */ |
46f9491e | 2209 | union |
37357796 RE |
2210 | { |
2211 | unsigned char contents[1]; | |
2212 | #ifdef HAVE_LONG_DOUBLE | |
2213 | long double d; | |
2214 | #else | |
2215 | double d; | |
2216 | #endif | |
2217 | } u; | |
79e68feb RS |
2218 | }; |
2219 | ||
2220 | #define HASHBITS 30 | |
2221 | #define MAX_HASH_TABLE 1009 | |
2222 | static struct constant_descriptor *const_hash_table[MAX_HASH_TABLE]; | |
2223 | ||
ac79cd5a RK |
2224 | /* We maintain a hash table of STRING_CST values. Unless we are asked to force |
2225 | out a string constant, we defer output of the constants until we know | |
2226 | they are actually used. This will be if something takes its address or if | |
2227 | there is a usage of the string in the RTL of a function. */ | |
2228 | ||
c203e7fe | 2229 | #define STRHASH(x) ((hashval_t) ((long) (x) >> 3)) |
bd7cf17e JJ |
2230 | |
2231 | struct deferred_string | |
2232 | { | |
520a57c8 | 2233 | const char *label; |
bd7cf17e JJ |
2234 | tree exp; |
2235 | int labelno; | |
2236 | }; | |
2237 | ||
2238 | static htab_t const_str_htab; | |
2239 | ||
76095e2f RH |
2240 | /* Mark a const_hash_table descriptor for GC. */ |
2241 | ||
46f9491e | 2242 | static void |
76095e2f RH |
2243 | mark_const_hash_entry (ptr) |
2244 | void *ptr; | |
2245 | { | |
2246 | struct constant_descriptor *desc = * (struct constant_descriptor **) ptr; | |
2247 | ||
2248 | while (desc) | |
2249 | { | |
14a774a9 | 2250 | ggc_mark_rtx (desc->rtl); |
76095e2f RH |
2251 | desc = desc->next; |
2252 | } | |
2253 | } | |
2254 | ||
bd7cf17e JJ |
2255 | /* Mark the hash-table element X (which is really a pointer to an |
2256 | struct deferred_string *). */ | |
46f9491e | 2257 | |
bd7cf17e JJ |
2258 | static int |
2259 | mark_const_str_htab_1 (x, data) | |
2260 | void **x; | |
2261 | void *data ATTRIBUTE_UNUSED; | |
2262 | { | |
2263 | ggc_mark_tree (((struct deferred_string *) *x)->exp); | |
2264 | return 1; | |
2265 | } | |
2266 | ||
2267 | /* Mark a const_str_htab for GC. */ | |
2268 | ||
46f9491e | 2269 | static void |
bd7cf17e JJ |
2270 | mark_const_str_htab (htab) |
2271 | void *htab; | |
2272 | { | |
2273 | htab_traverse (*((htab_t *) htab), mark_const_str_htab_1, NULL); | |
2274 | } | |
2275 | ||
2276 | /* Returns a hash code for X (which is a really a | |
2277 | struct deferred_string *). */ | |
2278 | ||
2279 | static hashval_t | |
2280 | const_str_htab_hash (x) | |
2281 | const void *x; | |
2282 | { | |
ce1cc601 | 2283 | return STRHASH (((const struct deferred_string *) x)->label); |
bd7cf17e JJ |
2284 | } |
2285 | ||
2286 | /* Returns non-zero if the value represented by X (which is really a | |
2287 | struct deferred_string *) is the same as that given by Y | |
2288 | (which is really a char *). */ | |
2289 | ||
2290 | static int | |
2291 | const_str_htab_eq (x, y) | |
2292 | const void *x; | |
2293 | const void *y; | |
2294 | { | |
ce1cc601 | 2295 | return (((const struct deferred_string *) x)->label == (const char *) y); |
bd7cf17e JJ |
2296 | } |
2297 | ||
2298 | /* Delete the hash table entry dfsp. */ | |
2299 | ||
2300 | static void | |
2301 | const_str_htab_del (dfsp) | |
c26fbbca | 2302 | void *dfsp; |
bd7cf17e JJ |
2303 | { |
2304 | free (dfsp); | |
2305 | } | |
2306 | ||
79e68feb RS |
2307 | /* Compute a hash code for a constant expression. */ |
2308 | ||
5a13eaa4 | 2309 | static int |
79e68feb RS |
2310 | const_hash (exp) |
2311 | tree exp; | |
2312 | { | |
b3694847 SS |
2313 | const char *p; |
2314 | int len, hi, i; | |
2315 | enum tree_code code = TREE_CODE (exp); | |
79e68feb | 2316 | |
a9d07d6e RK |
2317 | /* Either set P and LEN to the address and len of something to hash and |
2318 | exit the switch or return a value. */ | |
2319 | ||
2320 | switch (code) | |
79e68feb | 2321 | { |
a9d07d6e | 2322 | case INTEGER_CST: |
2afaa41c GM |
2323 | p = (char *) &TREE_INT_CST (exp); |
2324 | len = sizeof TREE_INT_CST (exp); | |
a9d07d6e RK |
2325 | break; |
2326 | ||
2327 | case REAL_CST: | |
79e68feb RS |
2328 | p = (char *) &TREE_REAL_CST (exp); |
2329 | len = sizeof TREE_REAL_CST (exp); | |
a9d07d6e | 2330 | break; |
79e68feb | 2331 | |
a9d07d6e RK |
2332 | case STRING_CST: |
2333 | p = TREE_STRING_POINTER (exp); | |
2334 | len = TREE_STRING_LENGTH (exp); | |
2335 | break; | |
79e68feb | 2336 | |
a9d07d6e RK |
2337 | case COMPLEX_CST: |
2338 | return (const_hash (TREE_REALPART (exp)) * 5 | |
2339 | + const_hash (TREE_IMAGPART (exp))); | |
2340 | ||
2341 | case CONSTRUCTOR: | |
2342 | if (TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) | |
79e68feb | 2343 | { |
3cce094d KG |
2344 | char *tmp; |
2345 | ||
a9d07d6e | 2346 | len = int_size_in_bytes (TREE_TYPE (exp)); |
3cce094d KG |
2347 | tmp = (char *) alloca (len); |
2348 | get_set_constructor_bytes (exp, (unsigned char *) tmp, len); | |
2349 | p = tmp; | |
a9d07d6e RK |
2350 | break; |
2351 | } | |
2352 | else | |
2353 | { | |
b3694847 | 2354 | tree link; |
a9d07d6e RK |
2355 | |
2356 | /* For record type, include the type in the hashing. | |
2357 | We do not do so for array types | |
2358 | because (1) the sizes of the elements are sufficient | |
2359 | and (2) distinct array types can have the same constructor. | |
2360 | Instead, we include the array size because the constructor could | |
2361 | be shorter. */ | |
2362 | if (TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE) | |
7bcac048 | 2363 | hi = ((unsigned long) TREE_TYPE (exp) & ((1 << HASHBITS) - 1)) |
a9d07d6e RK |
2364 | % MAX_HASH_TABLE; |
2365 | else | |
2366 | hi = ((5 + int_size_in_bytes (TREE_TYPE (exp))) | |
2367 | & ((1 << HASHBITS) - 1)) % MAX_HASH_TABLE; | |
2368 | ||
2369 | for (link = CONSTRUCTOR_ELTS (exp); link; link = TREE_CHAIN (link)) | |
2370 | if (TREE_VALUE (link)) | |
2371 | hi | |
2372 | = (hi * 603 + const_hash (TREE_VALUE (link))) % MAX_HASH_TABLE; | |
2373 | ||
2374 | return hi; | |
79e68feb | 2375 | } |
79e68feb | 2376 | |
a9d07d6e RK |
2377 | case ADDR_EXPR: |
2378 | { | |
2379 | struct addr_const value; | |
2380 | ||
2381 | decode_addr_const (exp, &value); | |
2382 | if (GET_CODE (value.base) == SYMBOL_REF) | |
2383 | { | |
2384 | /* Don't hash the address of the SYMBOL_REF; | |
2385 | only use the offset and the symbol name. */ | |
2386 | hi = value.offset; | |
2387 | p = XSTR (value.base, 0); | |
2388 | for (i = 0; p[i] != 0; i++) | |
2389 | hi = ((hi * 613) + (unsigned) (p[i])); | |
2390 | } | |
2391 | else if (GET_CODE (value.base) == LABEL_REF) | |
2392 | hi = value.offset + CODE_LABEL_NUMBER (XEXP (value.base, 0)) * 13; | |
6a651371 | 2393 | else |
c203e7fe | 2394 | abort (); |
a9d07d6e RK |
2395 | |
2396 | hi &= (1 << HASHBITS) - 1; | |
2397 | hi %= MAX_HASH_TABLE; | |
2398 | } | |
79e68feb | 2399 | return hi; |
a9d07d6e RK |
2400 | |
2401 | case PLUS_EXPR: | |
2402 | case MINUS_EXPR: | |
2403 | return (const_hash (TREE_OPERAND (exp, 0)) * 9 | |
2404 | + const_hash (TREE_OPERAND (exp, 1))); | |
2405 | ||
2406 | case NOP_EXPR: | |
2407 | case CONVERT_EXPR: | |
2408 | case NON_LVALUE_EXPR: | |
2409 | return const_hash (TREE_OPERAND (exp, 0)) * 7 + 2; | |
46f9491e | 2410 | |
e9a25f70 | 2411 | default: |
2d76cb1a | 2412 | /* A language specific constant. Just hash the code. */ |
dbbbbf3b | 2413 | return (int) code % MAX_HASH_TABLE; |
79e68feb | 2414 | } |
79e68feb RS |
2415 | |
2416 | /* Compute hashing function */ | |
2417 | hi = len; | |
2418 | for (i = 0; i < len; i++) | |
0f41302f | 2419 | hi = ((hi * 613) + (unsigned) (p[i])); |
79e68feb RS |
2420 | |
2421 | hi &= (1 << HASHBITS) - 1; | |
2422 | hi %= MAX_HASH_TABLE; | |
2423 | return hi; | |
2424 | } | |
2425 | \f | |
2426 | /* Compare a constant expression EXP with a constant-descriptor DESC. | |
2427 | Return 1 if DESC describes a constant with the same value as EXP. */ | |
2428 | ||
2429 | static int | |
2430 | compare_constant (exp, desc) | |
2431 | tree exp; | |
2432 | struct constant_descriptor *desc; | |
2433 | { | |
37357796 | 2434 | return 0 != compare_constant_1 (exp, desc->u.contents); |
79e68feb RS |
2435 | } |
2436 | ||
2437 | /* Compare constant expression EXP with a substring P of a constant descriptor. | |
2438 | If they match, return a pointer to the end of the substring matched. | |
2439 | If they do not match, return 0. | |
2440 | ||
2441 | Since descriptors are written in polish prefix notation, | |
2442 | this function can be used recursively to test one operand of EXP | |
2443 | against a subdescriptor, and if it succeeds it returns the | |
2444 | address of the subdescriptor for the next operand. */ | |
2445 | ||
990e8954 | 2446 | static const unsigned char * |
79e68feb RS |
2447 | compare_constant_1 (exp, p) |
2448 | tree exp; | |
990e8954 | 2449 | const unsigned char *p; |
79e68feb | 2450 | { |
b3694847 SS |
2451 | const unsigned char *strp; |
2452 | int len; | |
2453 | enum tree_code code = TREE_CODE (exp); | |
79e68feb RS |
2454 | |
2455 | if (code != (enum tree_code) *p++) | |
2456 | return 0; | |
2457 | ||
a9d07d6e RK |
2458 | /* Either set STRP, P and LEN to pointers and length to compare and exit the |
2459 | switch, or return the result of the comparison. */ | |
2460 | ||
2461 | switch (code) | |
79e68feb | 2462 | { |
a9d07d6e | 2463 | case INTEGER_CST: |
79e68feb RS |
2464 | /* Integer constants are the same only if the same width of type. */ |
2465 | if (*p++ != TYPE_PRECISION (TREE_TYPE (exp))) | |
2466 | return 0; | |
a9d07d6e | 2467 | |
2afaa41c GM |
2468 | strp = (unsigned char *) &TREE_INT_CST (exp); |
2469 | len = sizeof TREE_INT_CST (exp); | |
a9d07d6e RK |
2470 | break; |
2471 | ||
2472 | case REAL_CST: | |
79e68feb RS |
2473 | /* Real constants are the same only if the same width of type. */ |
2474 | if (*p++ != TYPE_PRECISION (TREE_TYPE (exp))) | |
2475 | return 0; | |
a9d07d6e | 2476 | |
990e8954 | 2477 | strp = (unsigned char *) &TREE_REAL_CST (exp); |
79e68feb | 2478 | len = sizeof TREE_REAL_CST (exp); |
a9d07d6e RK |
2479 | break; |
2480 | ||
2481 | case STRING_CST: | |
79e68feb RS |
2482 | if (flag_writable_strings) |
2483 | return 0; | |
a9d07d6e | 2484 | |
c8d8ed65 | 2485 | if ((enum machine_mode) *p++ != TYPE_MODE (TREE_TYPE (exp))) |
f163668c RK |
2486 | return 0; |
2487 | ||
e9d1b155 | 2488 | strp = (const unsigned char *) TREE_STRING_POINTER (exp); |
79e68feb | 2489 | len = TREE_STRING_LENGTH (exp); |
da61dec9 | 2490 | if (memcmp ((char *) &TREE_STRING_LENGTH (exp), p, |
ac79cd5a | 2491 | sizeof TREE_STRING_LENGTH (exp))) |
79e68feb | 2492 | return 0; |
a9d07d6e | 2493 | |
79e68feb | 2494 | p += sizeof TREE_STRING_LENGTH (exp); |
a9d07d6e | 2495 | break; |
79e68feb | 2496 | |
a9d07d6e RK |
2497 | case COMPLEX_CST: |
2498 | p = compare_constant_1 (TREE_REALPART (exp), p); | |
2499 | if (p == 0) | |
79e68feb | 2500 | return 0; |
79e68feb | 2501 | |
a9d07d6e | 2502 | return compare_constant_1 (TREE_IMAGPART (exp), p); |
79e68feb | 2503 | |
a9d07d6e RK |
2504 | case CONSTRUCTOR: |
2505 | if (TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) | |
eb528802 | 2506 | { |
a9d07d6e | 2507 | int xlen = len = int_size_in_bytes (TREE_TYPE (exp)); |
3cce094d | 2508 | unsigned char *tmp = (unsigned char *) alloca (len); |
a9d07d6e | 2509 | |
f9e158c3 | 2510 | get_set_constructor_bytes (exp, tmp, len); |
990e8954 | 2511 | strp = (unsigned char *) tmp; |
da61dec9 | 2512 | if (memcmp ((char *) &xlen, p, sizeof xlen)) |
eb528802 | 2513 | return 0; |
eb528802 | 2514 | |
a9d07d6e RK |
2515 | p += sizeof xlen; |
2516 | break; | |
2517 | } | |
2518 | else | |
77fa0940 | 2519 | { |
b3694847 | 2520 | tree link; |
a9d07d6e RK |
2521 | int length = list_length (CONSTRUCTOR_ELTS (exp)); |
2522 | tree type; | |
14a774a9 | 2523 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); |
e5e809f4 JL |
2524 | int have_purpose = 0; |
2525 | ||
2526 | for (link = CONSTRUCTOR_ELTS (exp); link; link = TREE_CHAIN (link)) | |
2527 | if (TREE_PURPOSE (link)) | |
2528 | have_purpose = 1; | |
a9d07d6e | 2529 | |
da61dec9 | 2530 | if (memcmp ((char *) &length, p, sizeof length)) |
a9d07d6e RK |
2531 | return 0; |
2532 | ||
2533 | p += sizeof length; | |
2534 | ||
2535 | /* For record constructors, insist that the types match. | |
46f9491e | 2536 | For arrays, just verify both constructors are for arrays. |
e5e809f4 JL |
2537 | Then insist that either both or none have any TREE_PURPOSE |
2538 | values. */ | |
a9d07d6e RK |
2539 | if (TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE) |
2540 | type = TREE_TYPE (exp); | |
2541 | else | |
2542 | type = 0; | |
2543 | ||
da61dec9 | 2544 | if (memcmp ((char *) &type, p, sizeof type)) |
a9d07d6e RK |
2545 | return 0; |
2546 | ||
14a774a9 RK |
2547 | if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE) |
2548 | { | |
da61dec9 | 2549 | if (memcmp ((char *) &mode, p, sizeof mode)) |
14a774a9 RK |
2550 | return 0; |
2551 | ||
2552 | p += sizeof mode; | |
2553 | } | |
2554 | ||
a9d07d6e RK |
2555 | p += sizeof type; |
2556 | ||
da61dec9 | 2557 | if (memcmp ((char *) &have_purpose, p, sizeof have_purpose)) |
e5e809f4 JL |
2558 | return 0; |
2559 | ||
2560 | p += sizeof have_purpose; | |
2561 | ||
a9d07d6e RK |
2562 | /* For arrays, insist that the size in bytes match. */ |
2563 | if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE) | |
77fa0940 | 2564 | { |
e5e809f4 JL |
2565 | HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (exp)); |
2566 | ||
da61dec9 | 2567 | if (memcmp ((char *) &size, p, sizeof size)) |
77fa0940 | 2568 | return 0; |
a9d07d6e RK |
2569 | |
2570 | p += sizeof size; | |
77fa0940 | 2571 | } |
a9d07d6e RK |
2572 | |
2573 | for (link = CONSTRUCTOR_ELTS (exp); link; link = TREE_CHAIN (link)) | |
77fa0940 | 2574 | { |
a9d07d6e RK |
2575 | if (TREE_VALUE (link)) |
2576 | { | |
2577 | if ((p = compare_constant_1 (TREE_VALUE (link), p)) == 0) | |
2578 | return 0; | |
2579 | } | |
2580 | else | |
2581 | { | |
2582 | tree zero = 0; | |
77fa0940 | 2583 | |
da61dec9 | 2584 | if (memcmp ((char *) &zero, p, sizeof zero)) |
e5e809f4 JL |
2585 | return 0; |
2586 | ||
2587 | p += sizeof zero; | |
2588 | } | |
2589 | ||
2590 | if (TREE_PURPOSE (link) | |
2591 | && TREE_CODE (TREE_PURPOSE (link)) == FIELD_DECL) | |
2592 | { | |
da61dec9 | 2593 | if (memcmp ((char *) &TREE_PURPOSE (link), p, |
c26fbbca | 2594 | sizeof TREE_PURPOSE (link))) |
e5e809f4 JL |
2595 | return 0; |
2596 | ||
2597 | p += sizeof TREE_PURPOSE (link); | |
2598 | } | |
2599 | else if (TREE_PURPOSE (link)) | |
2600 | { | |
2601 | if ((p = compare_constant_1 (TREE_PURPOSE (link), p)) == 0) | |
2602 | return 0; | |
2603 | } | |
2604 | else if (have_purpose) | |
2605 | { | |
2606 | int zero = 0; | |
2607 | ||
da61dec9 | 2608 | if (memcmp ((char *) &zero, p, sizeof zero)) |
a9d07d6e RK |
2609 | return 0; |
2610 | ||
2611 | p += sizeof zero; | |
2612 | } | |
77fa0940 | 2613 | } |
a9d07d6e RK |
2614 | |
2615 | return p; | |
77fa0940 RK |
2616 | } |
2617 | ||
a9d07d6e RK |
2618 | case ADDR_EXPR: |
2619 | { | |
2620 | struct addr_const value; | |
2621 | ||
2622 | decode_addr_const (exp, &value); | |
990e8954 | 2623 | strp = (unsigned char *) &value.offset; |
a9d07d6e RK |
2624 | len = sizeof value.offset; |
2625 | /* Compare the offset. */ | |
2626 | while (--len >= 0) | |
2627 | if (*p++ != *strp++) | |
2628 | return 0; | |
2629 | ||
2630 | /* Compare symbol name. */ | |
ce1cc601 KG |
2631 | strp = (const unsigned char *) XSTR (value.base, 0); |
2632 | len = strlen ((const char *) strp) + 1; | |
a9d07d6e RK |
2633 | } |
2634 | break; | |
2635 | ||
2636 | case PLUS_EXPR: | |
2637 | case MINUS_EXPR: | |
fa212801 | 2638 | case RANGE_EXPR: |
79e68feb | 2639 | p = compare_constant_1 (TREE_OPERAND (exp, 0), p); |
a9d07d6e RK |
2640 | if (p == 0) |
2641 | return 0; | |
2642 | ||
2643 | return compare_constant_1 (TREE_OPERAND (exp, 1), p); | |
2644 | ||
2645 | case NOP_EXPR: | |
2646 | case CONVERT_EXPR: | |
2647 | case NON_LVALUE_EXPR: | |
2648 | return compare_constant_1 (TREE_OPERAND (exp, 0), p); | |
e9a25f70 JL |
2649 | |
2650 | default: | |
ac79cd5a RK |
2651 | { |
2652 | tree new = (*lang_hooks.expand_constant) (exp); | |
2653 | ||
2654 | if (new != exp) | |
c26fbbca | 2655 | return compare_constant_1 (new, p); |
ac79cd5a RK |
2656 | else |
2657 | return 0; | |
2658 | } | |
79e68feb RS |
2659 | } |
2660 | ||
2661 | /* Compare constant contents. */ | |
2662 | while (--len >= 0) | |
2663 | if (*p++ != *strp++) | |
2664 | return 0; | |
2665 | ||
2666 | return p; | |
2667 | } | |
2668 | \f | |
2669 | /* Construct a constant descriptor for the expression EXP. | |
2670 | It is up to the caller to enter the descriptor in the hash table. */ | |
2671 | ||
2672 | static struct constant_descriptor * | |
2673 | record_constant (exp) | |
2674 | tree exp; | |
2675 | { | |
387e854a RK |
2676 | struct constant_descriptor *next = 0; |
2677 | char *label = 0; | |
14a774a9 | 2678 | rtx rtl = 0; |
cac16ef9 | 2679 | int pad; |
79e68feb | 2680 | |
14a774a9 | 2681 | /* Make a struct constant_descriptor. The first three pointers will |
387e854a RK |
2682 | be filled in later. Here we just leave space for them. */ |
2683 | ||
2684 | obstack_grow (&permanent_obstack, (char *) &next, sizeof next); | |
2685 | obstack_grow (&permanent_obstack, (char *) &label, sizeof label); | |
14a774a9 | 2686 | obstack_grow (&permanent_obstack, (char *) &rtl, sizeof rtl); |
cac16ef9 RH |
2687 | |
2688 | /* Align the descriptor for the data payload. */ | |
2689 | pad = (offsetof (struct constant_descriptor, u) | |
2690 | - offsetof(struct constant_descriptor, rtl) | |
2691 | - sizeof(next->rtl)); | |
2692 | if (pad > 0) | |
2693 | obstack_blank (&permanent_obstack, pad); | |
2694 | ||
79e68feb RS |
2695 | record_constant_1 (exp); |
2696 | return (struct constant_descriptor *) obstack_finish (&permanent_obstack); | |
2697 | } | |
2698 | ||
2699 | /* Add a description of constant expression EXP | |
2700 | to the object growing in `permanent_obstack'. | |
2701 | No need to return its address; the caller will get that | |
2702 | from the obstack when the object is complete. */ | |
2703 | ||
2704 | static void | |
2705 | record_constant_1 (exp) | |
2706 | tree exp; | |
2707 | { | |
b3694847 SS |
2708 | const unsigned char *strp; |
2709 | int len; | |
2710 | enum tree_code code = TREE_CODE (exp); | |
79e68feb RS |
2711 | |
2712 | obstack_1grow (&permanent_obstack, (unsigned int) code); | |
2713 | ||
2871d24f | 2714 | switch (code) |
79e68feb | 2715 | { |
2871d24f | 2716 | case INTEGER_CST: |
79e68feb | 2717 | obstack_1grow (&permanent_obstack, TYPE_PRECISION (TREE_TYPE (exp))); |
2afaa41c GM |
2718 | strp = (unsigned char *) &TREE_INT_CST (exp); |
2719 | len = sizeof TREE_INT_CST (exp); | |
2871d24f RK |
2720 | break; |
2721 | ||
2722 | case REAL_CST: | |
79e68feb | 2723 | obstack_1grow (&permanent_obstack, TYPE_PRECISION (TREE_TYPE (exp))); |
990e8954 | 2724 | strp = (unsigned char *) &TREE_REAL_CST (exp); |
79e68feb | 2725 | len = sizeof TREE_REAL_CST (exp); |
2871d24f RK |
2726 | break; |
2727 | ||
2728 | case STRING_CST: | |
79e68feb RS |
2729 | if (flag_writable_strings) |
2730 | return; | |
2871d24f | 2731 | |
f163668c | 2732 | obstack_1grow (&permanent_obstack, TYPE_MODE (TREE_TYPE (exp))); |
ce1cc601 | 2733 | strp = (const unsigned char *) TREE_STRING_POINTER (exp); |
79e68feb RS |
2734 | len = TREE_STRING_LENGTH (exp); |
2735 | obstack_grow (&permanent_obstack, (char *) &TREE_STRING_LENGTH (exp), | |
2736 | sizeof TREE_STRING_LENGTH (exp)); | |
2871d24f RK |
2737 | break; |
2738 | ||
2739 | case COMPLEX_CST: | |
79e68feb RS |
2740 | record_constant_1 (TREE_REALPART (exp)); |
2741 | record_constant_1 (TREE_IMAGPART (exp)); | |
2742 | return; | |
79e68feb | 2743 | |
2871d24f RK |
2744 | case CONSTRUCTOR: |
2745 | if (TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) | |
eb528802 | 2746 | { |
2871d24f RK |
2747 | int nbytes = int_size_in_bytes (TREE_TYPE (exp)); |
2748 | obstack_grow (&permanent_obstack, &nbytes, sizeof (nbytes)); | |
2749 | obstack_blank (&permanent_obstack, nbytes); | |
2750 | get_set_constructor_bytes | |
c26fbbca | 2751 | (exp, (unsigned char *) permanent_obstack.next_free - nbytes, |
2491d239 | 2752 | nbytes); |
2871d24f | 2753 | return; |
eb528802 | 2754 | } |
2871d24f | 2755 | else |
77fa0940 | 2756 | { |
b3694847 | 2757 | tree link; |
2871d24f | 2758 | int length = list_length (CONSTRUCTOR_ELTS (exp)); |
14a774a9 | 2759 | enum machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); |
2871d24f | 2760 | tree type; |
e5e809f4 JL |
2761 | int have_purpose = 0; |
2762 | ||
2763 | for (link = CONSTRUCTOR_ELTS (exp); link; link = TREE_CHAIN (link)) | |
2764 | if (TREE_PURPOSE (link)) | |
2765 | have_purpose = 1; | |
2871d24f RK |
2766 | |
2767 | obstack_grow (&permanent_obstack, (char *) &length, sizeof length); | |
2768 | ||
2769 | /* For record constructors, insist that the types match. | |
14a774a9 RK |
2770 | For arrays, just verify both constructors are for arrays |
2771 | of the same mode. Then insist that either both or none | |
2772 | have any TREE_PURPOSE values. */ | |
2871d24f RK |
2773 | if (TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE) |
2774 | type = TREE_TYPE (exp); | |
77fa0940 | 2775 | else |
2871d24f | 2776 | type = 0; |
14a774a9 | 2777 | |
2871d24f | 2778 | obstack_grow (&permanent_obstack, (char *) &type, sizeof type); |
14a774a9 RK |
2779 | if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE) |
2780 | obstack_grow (&permanent_obstack, &mode, sizeof mode); | |
46f9491e | 2781 | |
e5e809f4 JL |
2782 | obstack_grow (&permanent_obstack, (char *) &have_purpose, |
2783 | sizeof have_purpose); | |
2871d24f RK |
2784 | |
2785 | /* For arrays, insist that the size in bytes match. */ | |
2786 | if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE) | |
77fa0940 | 2787 | { |
e5e809f4 | 2788 | HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (exp)); |
2871d24f RK |
2789 | obstack_grow (&permanent_obstack, (char *) &size, sizeof size); |
2790 | } | |
77fa0940 | 2791 | |
2871d24f RK |
2792 | for (link = CONSTRUCTOR_ELTS (exp); link; link = TREE_CHAIN (link)) |
2793 | { | |
2794 | if (TREE_VALUE (link)) | |
2795 | record_constant_1 (TREE_VALUE (link)); | |
2796 | else | |
2797 | { | |
2798 | tree zero = 0; | |
2799 | ||
e5e809f4 JL |
2800 | obstack_grow (&permanent_obstack, |
2801 | (char *) &zero, sizeof zero); | |
2802 | } | |
2803 | ||
2804 | if (TREE_PURPOSE (link) | |
2805 | && TREE_CODE (TREE_PURPOSE (link)) == FIELD_DECL) | |
2806 | obstack_grow (&permanent_obstack, | |
2807 | (char *) &TREE_PURPOSE (link), | |
2808 | sizeof TREE_PURPOSE (link)); | |
2809 | else if (TREE_PURPOSE (link)) | |
2810 | record_constant_1 (TREE_PURPOSE (link)); | |
2811 | else if (have_purpose) | |
2812 | { | |
2813 | int zero = 0; | |
2814 | ||
2871d24f RK |
2815 | obstack_grow (&permanent_obstack, |
2816 | (char *) &zero, sizeof zero); | |
2817 | } | |
77fa0940 RK |
2818 | } |
2819 | } | |
79e68feb | 2820 | return; |
2871d24f RK |
2821 | |
2822 | case ADDR_EXPR: | |
2823 | { | |
2824 | struct addr_const value; | |
2825 | ||
2826 | decode_addr_const (exp, &value); | |
2827 | /* Record the offset. */ | |
2828 | obstack_grow (&permanent_obstack, | |
2829 | (char *) &value.offset, sizeof value.offset); | |
e67cd9f8 RH |
2830 | |
2831 | switch (GET_CODE (value.base)) | |
2832 | { | |
2833 | case SYMBOL_REF: | |
2834 | /* Record the symbol name. */ | |
2835 | obstack_grow (&permanent_obstack, XSTR (value.base, 0), | |
2836 | strlen (XSTR (value.base, 0)) + 1); | |
2837 | break; | |
2838 | case LABEL_REF: | |
2839 | /* Record the address of the CODE_LABEL. It may not have | |
2840 | been emitted yet, so it's UID may be zero. But pointer | |
2841 | identity is good enough. */ | |
2842 | obstack_grow (&permanent_obstack, &XEXP (value.base, 0), | |
2843 | sizeof (rtx)); | |
2844 | break; | |
2845 | default: | |
2846 | abort (); | |
2847 | } | |
2871d24f | 2848 | } |
79e68feb | 2849 | return; |
2871d24f RK |
2850 | |
2851 | case PLUS_EXPR: | |
2852 | case MINUS_EXPR: | |
fa212801 | 2853 | case RANGE_EXPR: |
79e68feb RS |
2854 | record_constant_1 (TREE_OPERAND (exp, 0)); |
2855 | record_constant_1 (TREE_OPERAND (exp, 1)); | |
2856 | return; | |
2871d24f RK |
2857 | |
2858 | case NOP_EXPR: | |
2859 | case CONVERT_EXPR: | |
2860 | case NON_LVALUE_EXPR: | |
79e68feb RS |
2861 | record_constant_1 (TREE_OPERAND (exp, 0)); |
2862 | return; | |
2871d24f RK |
2863 | |
2864 | default: | |
ac79cd5a RK |
2865 | { |
2866 | tree new = (*lang_hooks.expand_constant) (exp); | |
2867 | ||
2868 | if (new != exp) | |
c26fbbca | 2869 | record_constant_1 (new); |
ac79cd5a RK |
2870 | return; |
2871 | } | |
79e68feb RS |
2872 | } |
2873 | ||
2874 | /* Record constant contents. */ | |
2875 | obstack_grow (&permanent_obstack, strp, len); | |
2876 | } | |
2877 | \f | |
ff8f4401 RS |
2878 | /* Record a list of constant expressions that were passed to |
2879 | output_constant_def but that could not be output right away. */ | |
2880 | ||
2881 | struct deferred_constant | |
2882 | { | |
2883 | struct deferred_constant *next; | |
2884 | tree exp; | |
2885 | int reloc; | |
2886 | int labelno; | |
2887 | }; | |
2888 | ||
2889 | static struct deferred_constant *deferred_constants; | |
2890 | ||
8839fca4 ILT |
2891 | /* Another list of constants which should be output after the |
2892 | function. */ | |
2893 | static struct deferred_constant *after_function_constants; | |
2894 | ||
ff8f4401 RS |
2895 | /* Nonzero means defer output of addressed subconstants |
2896 | (i.e., those for which output_constant_def is called.) */ | |
2897 | static int defer_addressed_constants_flag; | |
2898 | ||
2899 | /* Start deferring output of subconstants. */ | |
2900 | ||
2901 | void | |
2902 | defer_addressed_constants () | |
2903 | { | |
2904 | defer_addressed_constants_flag++; | |
2905 | } | |
2906 | ||
2907 | /* Stop deferring output of subconstants, | |
2908 | and output now all those that have been deferred. */ | |
2909 | ||
2910 | void | |
2911 | output_deferred_addressed_constants () | |
2912 | { | |
2913 | struct deferred_constant *p, *next; | |
2914 | ||
2915 | defer_addressed_constants_flag--; | |
2916 | ||
2917 | if (defer_addressed_constants_flag > 0) | |
2918 | return; | |
2919 | ||
2920 | for (p = deferred_constants; p; p = next) | |
2921 | { | |
2922 | output_constant_def_contents (p->exp, p->reloc, p->labelno); | |
2923 | next = p->next; | |
2924 | free (p); | |
2925 | } | |
2926 | ||
2927 | deferred_constants = 0; | |
2928 | } | |
d12516f1 | 2929 | |
8839fca4 ILT |
2930 | /* Output any constants which should appear after a function. */ |
2931 | ||
2932 | static void | |
2933 | output_after_function_constants () | |
2934 | { | |
2935 | struct deferred_constant *p, *next; | |
2936 | ||
2937 | for (p = after_function_constants; p; p = next) | |
2938 | { | |
2939 | output_constant_def_contents (p->exp, p->reloc, p->labelno); | |
2940 | next = p->next; | |
2941 | free (p); | |
2942 | } | |
2943 | ||
2944 | after_function_constants = 0; | |
2945 | } | |
2946 | ||
d12516f1 RS |
2947 | /* Make a copy of the whole tree structure for a constant. |
2948 | This handles the same types of nodes that compare_constant | |
2949 | and record_constant handle. */ | |
2950 | ||
2951 | static tree | |
2952 | copy_constant (exp) | |
2953 | tree exp; | |
2954 | { | |
2955 | switch (TREE_CODE (exp)) | |
2956 | { | |
310bbbf4 JW |
2957 | case ADDR_EXPR: |
2958 | /* For ADDR_EXPR, we do not want to copy the decl whose address | |
2959 | is requested. We do want to copy constants though. */ | |
2960 | if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == 'c') | |
2961 | return build1 (TREE_CODE (exp), TREE_TYPE (exp), | |
2962 | copy_constant (TREE_OPERAND (exp, 0))); | |
2963 | else | |
2964 | return copy_node (exp); | |
2965 | ||
d12516f1 RS |
2966 | case INTEGER_CST: |
2967 | case REAL_CST: | |
2968 | case STRING_CST: | |
d12516f1 RS |
2969 | return copy_node (exp); |
2970 | ||
2971 | case COMPLEX_CST: | |
28eb1cb8 RK |
2972 | return build_complex (TREE_TYPE (exp), |
2973 | copy_constant (TREE_REALPART (exp)), | |
d12516f1 RS |
2974 | copy_constant (TREE_IMAGPART (exp))); |
2975 | ||
2976 | case PLUS_EXPR: | |
2977 | case MINUS_EXPR: | |
2978 | return build (TREE_CODE (exp), TREE_TYPE (exp), | |
2979 | copy_constant (TREE_OPERAND (exp, 0)), | |
2980 | copy_constant (TREE_OPERAND (exp, 1))); | |
2981 | ||
2982 | case NOP_EXPR: | |
2983 | case CONVERT_EXPR: | |
a9d07d6e | 2984 | case NON_LVALUE_EXPR: |
d12516f1 RS |
2985 | return build1 (TREE_CODE (exp), TREE_TYPE (exp), |
2986 | copy_constant (TREE_OPERAND (exp, 0))); | |
2987 | ||
2988 | case CONSTRUCTOR: | |
2989 | { | |
2990 | tree copy = copy_node (exp); | |
2991 | tree list = copy_list (CONSTRUCTOR_ELTS (exp)); | |
2992 | tree tail; | |
2993 | ||
bb31ce0a | 2994 | CONSTRUCTOR_ELTS (copy) = list; |
d12516f1 RS |
2995 | for (tail = list; tail; tail = TREE_CHAIN (tail)) |
2996 | TREE_VALUE (tail) = copy_constant (TREE_VALUE (tail)); | |
474bda6c PB |
2997 | if (TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) |
2998 | for (tail = list; tail; tail = TREE_CHAIN (tail)) | |
2999 | TREE_PURPOSE (tail) = copy_constant (TREE_PURPOSE (tail)); | |
d12516f1 RS |
3000 | |
3001 | return copy; | |
3002 | } | |
3003 | ||
3004 | default: | |
3005 | abort (); | |
3006 | } | |
3007 | } | |
ff8f4401 | 3008 | \f |
79e68feb RS |
3009 | /* Return an rtx representing a reference to constant data in memory |
3010 | for the constant expression EXP. | |
ff8f4401 | 3011 | |
79e68feb RS |
3012 | If assembler code for such a constant has already been output, |
3013 | return an rtx to refer to it. | |
ff8f4401 RS |
3014 | Otherwise, output such a constant in memory (or defer it for later) |
3015 | and generate an rtx for it. | |
3016 | ||
bd7cf17e JJ |
3017 | If DEFER is non-zero, the output of string constants can be deferred |
3018 | and output only if referenced in the function after all optimizations. | |
3019 | ||
ff8f4401 | 3020 | The TREE_CST_RTL of EXP is set up to point to that rtx. |
79e68feb RS |
3021 | The const_hash_table records which constants already have label strings. */ |
3022 | ||
3023 | rtx | |
bd7cf17e | 3024 | output_constant_def (exp, defer) |
79e68feb | 3025 | tree exp; |
bd7cf17e | 3026 | int defer; |
79e68feb | 3027 | { |
b3694847 SS |
3028 | int hash; |
3029 | struct constant_descriptor *desc; | |
bd7cf17e | 3030 | struct deferred_string **defstr; |
79e68feb | 3031 | char label[256]; |
79e68feb | 3032 | int reloc; |
14a774a9 | 3033 | int found = 1; |
bd7cf17e JJ |
3034 | int after_function = 0; |
3035 | int labelno = -1; | |
a79e3a45 | 3036 | rtx rtl; |
79e68feb | 3037 | |
ac79cd5a | 3038 | /* We can't just use the saved RTL if this is a defererred string constant |
2724afa4 | 3039 | and we are not to defer anymore. */ |
ac79cd5a RK |
3040 | if (TREE_CODE (exp) != INTEGER_CST && TREE_CST_RTL (exp) |
3041 | && (defer || !STRING_POOL_ADDRESS_P (XEXP (TREE_CST_RTL (exp), 0)))) | |
79e68feb RS |
3042 | return TREE_CST_RTL (exp); |
3043 | ||
3044 | /* Make sure any other constants whose addresses appear in EXP | |
3045 | are assigned label numbers. */ | |
3046 | ||
3047 | reloc = output_addressed_constants (exp); | |
3048 | ||
3049 | /* Compute hash code of EXP. Search the descriptors for that hash code | |
3050 | to see if any of them describes EXP. If yes, the descriptor records | |
3051 | the label number already assigned. */ | |
3052 | ||
00f07fb9 | 3053 | hash = const_hash (exp) % MAX_HASH_TABLE; |
46f9491e | 3054 | |
00f07fb9 RK |
3055 | for (desc = const_hash_table[hash]; desc; desc = desc->next) |
3056 | if (compare_constant (exp, desc)) | |
14a774a9 | 3057 | break; |
46f9491e | 3058 | |
14a774a9 | 3059 | if (desc == 0) |
00f07fb9 RK |
3060 | { |
3061 | /* No constant equal to EXP is known to have been output. | |
3062 | Make a constant descriptor to enter EXP in the hash table. | |
3063 | Assign the label number and record it in the descriptor for | |
3064 | future calls to this function to find. */ | |
46f9491e | 3065 | |
00f07fb9 | 3066 | /* Create a string containing the label name, in LABEL. */ |
bd7cf17e JJ |
3067 | labelno = const_labelno++; |
3068 | ASM_GENERATE_INTERNAL_LABEL (label, "LC", labelno); | |
00f07fb9 RK |
3069 | |
3070 | desc = record_constant (exp); | |
3071 | desc->next = const_hash_table[hash]; | |
a8a05998 | 3072 | desc->label = ggc_strdup (label); |
00f07fb9 | 3073 | const_hash_table[hash] = desc; |
46f9491e | 3074 | |
1f8f4a0b | 3075 | /* We have a symbol name; construct the SYMBOL_REF and the MEM. */ |
a79e3a45 | 3076 | rtl = desc->rtl |
14a774a9 RK |
3077 | = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (exp)), |
3078 | gen_rtx_SYMBOL_REF (Pmode, desc->label)); | |
00f07fb9 | 3079 | |
a79e3a45 RK |
3080 | set_mem_attributes (rtl, exp, 1); |
3081 | set_mem_alias_set (rtl, 0); | |
3082 | set_mem_alias_set (rtl, const_alias_set); | |
14a774a9 RK |
3083 | |
3084 | found = 0; | |
3085 | } | |
a79e3a45 RK |
3086 | else |
3087 | rtl = desc->rtl; | |
14a774a9 | 3088 | |
a79e3a45 RK |
3089 | if (TREE_CODE (exp) != INTEGER_CST) |
3090 | TREE_CST_RTL (exp) = rtl; | |
79e68feb RS |
3091 | |
3092 | /* Optionally set flags or add text to the name to record information | |
3093 | such as that it is a function name. If the name is changed, the macro | |
8a425a05 | 3094 | ASM_OUTPUT_LABELREF will have to know how to strip this information. */ |
e1b4533c AO |
3095 | /* A previously-processed constant would already have section info |
3096 | encoded in it. */ | |
3097 | if (! found) | |
3098 | { | |
fb49053f RH |
3099 | /* Take care not to invoke targetm.encode_section_info for |
3100 | constants which don't have a TREE_CST_RTL. */ | |
ec493bcb | 3101 | if (TREE_CODE (exp) != INTEGER_CST) |
fb49053f | 3102 | (*targetm.encode_section_info) (exp, true); |
ed4fbfa0 | 3103 | |
a79e3a45 | 3104 | desc->rtl = rtl; |
e1b4533c AO |
3105 | desc->label = XSTR (XEXP (desc->rtl, 0), 0); |
3106 | } | |
79e68feb | 3107 | |
bd7cf17e JJ |
3108 | #ifdef CONSTANT_AFTER_FUNCTION_P |
3109 | if (current_function_decl != 0 | |
3110 | && CONSTANT_AFTER_FUNCTION_P (exp)) | |
3111 | after_function = 1; | |
3112 | #endif | |
3113 | ||
3114 | if (found | |
a79e3a45 | 3115 | && STRING_POOL_ADDRESS_P (XEXP (rtl, 0)) |
bd7cf17e JJ |
3116 | && (!defer || defer_addressed_constants_flag || after_function)) |
3117 | { | |
3118 | defstr = (struct deferred_string **) | |
3119 | htab_find_slot_with_hash (const_str_htab, desc->label, | |
3120 | STRHASH (desc->label), NO_INSERT); | |
3121 | if (defstr) | |
3122 | { | |
3123 | /* If the string is currently deferred but we need to output it now, | |
3124 | remove it from deferred string hash table. */ | |
3125 | found = 0; | |
3126 | labelno = (*defstr)->labelno; | |
a79e3a45 | 3127 | STRING_POOL_ADDRESS_P (XEXP (rtl, 0)) = 0; |
bd7cf17e JJ |
3128 | htab_clear_slot (const_str_htab, (void **) defstr); |
3129 | } | |
3130 | } | |
3131 | ||
ff8f4401 RS |
3132 | /* If this is the first time we've seen this particular constant, |
3133 | output it (or defer its output for later). */ | |
14a774a9 | 3134 | if (! found) |
79e68feb | 3135 | { |
8839fca4 | 3136 | if (defer_addressed_constants_flag || after_function) |
ff8f4401 | 3137 | { |
a79e3a45 RK |
3138 | struct deferred_constant *p |
3139 | = (struct deferred_constant *) | |
3140 | xmalloc (sizeof (struct deferred_constant)); | |
ff8f4401 | 3141 | |
d12516f1 | 3142 | p->exp = copy_constant (exp); |
ff8f4401 | 3143 | p->reloc = reloc; |
bd7cf17e | 3144 | p->labelno = labelno; |
8839fca4 ILT |
3145 | if (after_function) |
3146 | { | |
3147 | p->next = after_function_constants; | |
3148 | after_function_constants = p; | |
3149 | } | |
3150 | else | |
3151 | { | |
3152 | p->next = deferred_constants; | |
3153 | deferred_constants = p; | |
3154 | } | |
ff8f4401 RS |
3155 | } |
3156 | else | |
3c350eb3 CB |
3157 | { |
3158 | /* Do no output if -fsyntax-only. */ | |
3159 | if (! flag_syntax_only) | |
bd7cf17e JJ |
3160 | { |
3161 | if (TREE_CODE (exp) != STRING_CST | |
3162 | || !defer | |
3163 | || flag_writable_strings | |
3164 | || (defstr = (struct deferred_string **) | |
3165 | htab_find_slot_with_hash (const_str_htab, | |
3166 | desc->label, | |
3167 | STRHASH (desc->label), | |
3168 | INSERT)) == NULL) | |
3169 | output_constant_def_contents (exp, reloc, labelno); | |
3170 | else | |
3171 | { | |
3172 | struct deferred_string *p; | |
3173 | ||
3174 | p = (struct deferred_string *) | |
3175 | xmalloc (sizeof (struct deferred_string)); | |
3176 | ||
3177 | p->exp = copy_constant (exp); | |
3178 | p->label = desc->label; | |
3179 | p->labelno = labelno; | |
3180 | *defstr = p; | |
a79e3a45 | 3181 | STRING_POOL_ADDRESS_P (XEXP (rtl, 0)) = 1; |
bd7cf17e JJ |
3182 | } |
3183 | } | |
3c350eb3 | 3184 | } |
ff8f4401 RS |
3185 | } |
3186 | ||
a79e3a45 | 3187 | return rtl; |
ff8f4401 RS |
3188 | } |
3189 | ||
3190 | /* Now output assembler code to define the label for EXP, | |
3191 | and follow it with the data of EXP. */ | |
79e68feb | 3192 | |
ff8f4401 RS |
3193 | static void |
3194 | output_constant_def_contents (exp, reloc, labelno) | |
3195 | tree exp; | |
3196 | int reloc; | |
3197 | int labelno; | |
3198 | { | |
3199 | int align; | |
3200 | ||
201556f0 JJ |
3201 | /* Align the location counter as required by EXP's data type. */ |
3202 | align = TYPE_ALIGN (TREE_TYPE (exp)); | |
3203 | #ifdef CONSTANT_ALIGNMENT | |
3204 | align = CONSTANT_ALIGNMENT (exp, align); | |
3205 | #endif | |
3206 | ||
8a425a05 | 3207 | if (IN_NAMED_SECTION (exp)) |
ad4ff310 | 3208 | named_section (exp, NULL, reloc); |
8a425a05 | 3209 | else |
ae46c4e0 | 3210 | (*targetm.asm_out.select_section) (exp, reloc, align); |
79e68feb | 3211 | |
ff8f4401 | 3212 | if (align > BITS_PER_UNIT) |
91ea4f8d KG |
3213 | { |
3214 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT)); | |
3215 | } | |
79e68feb | 3216 | |
ff8f4401 RS |
3217 | /* Output the label itself. */ |
3218 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LC", labelno); | |
79e68feb | 3219 | |
ff8f4401 RS |
3220 | /* Output the value of EXP. */ |
3221 | output_constant (exp, | |
3222 | (TREE_CODE (exp) == STRING_CST | |
c6b74046 JDA |
3223 | ? MAX (TREE_STRING_LENGTH (exp), |
3224 | int_size_in_bytes (TREE_TYPE (exp))) | |
c8af3574 RH |
3225 | : int_size_in_bytes (TREE_TYPE (exp))), |
3226 | align); | |
79e68feb | 3227 | |
79e68feb RS |
3228 | } |
3229 | \f | |
79e68feb RS |
3230 | /* Structure to represent sufficient information about a constant so that |
3231 | it can be output when the constant pool is output, so that function | |
3232 | integration can be done, and to simplify handling on machines that reference | |
3233 | constant pool as base+displacement. */ | |
3234 | ||
3235 | struct pool_constant | |
3236 | { | |
3237 | struct constant_descriptor *desc; | |
94b01be3 | 3238 | struct pool_constant *next, *next_sym; |
79e68feb | 3239 | rtx constant; |
94b01be3 | 3240 | enum machine_mode mode; |
79e68feb | 3241 | int labelno; |
a79e3a45 RK |
3242 | unsigned int align; |
3243 | HOST_WIDE_INT offset; | |
91674c37 | 3244 | int mark; |
79e68feb RS |
3245 | }; |
3246 | ||
79e68feb RS |
3247 | /* Hash code for a SYMBOL_REF with CONSTANT_POOL_ADDRESS_P true. |
3248 | The argument is XSTR (... , 0) */ | |
3249 | ||
3250 | #define SYMHASH(LABEL) \ | |
7bcac048 | 3251 | ((((unsigned long) (LABEL)) & ((1 << HASHBITS) - 1)) % MAX_RTX_HASH_TABLE) |
79e68feb | 3252 | \f |
36edd3cc | 3253 | /* Initialize constant pool hashing for a new function. */ |
79e68feb RS |
3254 | |
3255 | void | |
36edd3cc BS |
3256 | init_varasm_status (f) |
3257 | struct function *f; | |
79e68feb | 3258 | { |
36edd3cc BS |
3259 | struct varasm_status *p; |
3260 | p = (struct varasm_status *) xmalloc (sizeof (struct varasm_status)); | |
3261 | f->varasm = p; | |
3262 | p->x_const_rtx_hash_table | |
57632c51 | 3263 | = ((struct constant_descriptor **) |
1f8f4a0b | 3264 | xcalloc (MAX_RTX_HASH_TABLE, sizeof (struct constant_descriptor *))); |
36edd3cc | 3265 | p->x_const_rtx_sym_hash_table |
94b01be3 JJ |
3266 | = ((struct pool_constant **) |
3267 | xcalloc (MAX_RTX_HASH_TABLE, sizeof (struct pool_constant *))); | |
79e68feb | 3268 | |
36edd3cc BS |
3269 | p->x_first_pool = p->x_last_pool = 0; |
3270 | p->x_pool_offset = 0; | |
57632c51 | 3271 | } |
e2ecd91c | 3272 | |
87ff9c8e RH |
3273 | /* Mark PC for GC. */ |
3274 | ||
46f9491e | 3275 | static void |
87ff9c8e RH |
3276 | mark_pool_constant (pc) |
3277 | struct pool_constant *pc; | |
3278 | { | |
3279 | while (pc) | |
3280 | { | |
1f8f4a0b | 3281 | ggc_mark (pc); |
87ff9c8e | 3282 | ggc_mark_rtx (pc->constant); |
a79e3a45 | 3283 | ggc_mark_rtx (pc->desc->rtl); |
87ff9c8e RH |
3284 | pc = pc->next; |
3285 | } | |
3286 | } | |
3287 | ||
3288 | /* Mark P for GC. */ | |
3289 | ||
3290 | void | |
fa51b01b RH |
3291 | mark_varasm_status (p) |
3292 | struct varasm_status *p; | |
87ff9c8e | 3293 | { |
fa51b01b RH |
3294 | if (p == NULL) |
3295 | return; | |
3296 | ||
87ff9c8e | 3297 | mark_pool_constant (p->x_first_pool); |
87ff9c8e RH |
3298 | } |
3299 | ||
21cd906e MM |
3300 | /* Clear out all parts of the state in F that can safely be discarded |
3301 | after the function has been compiled, to let garbage collection | |
0a8a198c | 3302 | reclaim the memory. */ |
21cd906e | 3303 | |
e2ecd91c | 3304 | void |
0a8a198c | 3305 | free_varasm_status (f) |
e2ecd91c BS |
3306 | struct function *f; |
3307 | { | |
21cd906e | 3308 | struct varasm_status *p; |
1f8f4a0b | 3309 | int i; |
21cd906e | 3310 | |
21cd906e | 3311 | p = f->varasm; |
1f8f4a0b MM |
3312 | |
3313 | /* Clear out the hash tables. */ | |
3314 | for (i = 0; i < MAX_RTX_HASH_TABLE; ++i) | |
3315 | { | |
a79e3a45 | 3316 | struct constant_descriptor *cd; |
1f8f4a0b MM |
3317 | |
3318 | cd = p->x_const_rtx_hash_table[i]; | |
a79e3a45 RK |
3319 | while (cd) |
3320 | { | |
3321 | struct constant_descriptor *next = cd->next; | |
3322 | ||
3323 | free (cd); | |
3324 | cd = next; | |
3325 | } | |
1f8f4a0b MM |
3326 | } |
3327 | ||
e2ecd91c BS |
3328 | free (p->x_const_rtx_hash_table); |
3329 | free (p->x_const_rtx_sym_hash_table); | |
fa51b01b | 3330 | free (p); |
a79e3a45 | 3331 | |
fa51b01b | 3332 | f->varasm = NULL; |
e2ecd91c | 3333 | } |
57632c51 | 3334 | \f |
79e68feb | 3335 | |
79e68feb RS |
3336 | /* Express an rtx for a constant integer (perhaps symbolic) |
3337 | as the sum of a symbol or label plus an explicit integer. | |
3338 | They are stored into VALUE. */ | |
3339 | ||
3340 | static void | |
3341 | decode_rtx_const (mode, x, value) | |
3342 | enum machine_mode mode; | |
3343 | rtx x; | |
3344 | struct rtx_const *value; | |
3345 | { | |
3346 | /* Clear the whole structure, including any gaps. */ | |
da61dec9 | 3347 | memset (value, 0, sizeof (struct rtx_const)); |
79e68feb | 3348 | |
0f41302f | 3349 | value->kind = RTX_INT; /* Most usual kind. */ |
79e68feb RS |
3350 | value->mode = mode; |
3351 | ||
3352 | switch (GET_CODE (x)) | |
3353 | { | |
3354 | case CONST_DOUBLE: | |
3355 | value->kind = RTX_DOUBLE; | |
56e2d435 | 3356 | if (GET_MODE (x) != VOIDmode) |
0b19a5b9 RK |
3357 | { |
3358 | value->mode = GET_MODE (x); | |
b216cd4a | 3359 | REAL_VALUE_FROM_CONST_DOUBLE (value->un.du, x); |
0b19a5b9 RK |
3360 | } |
3361 | else | |
3362 | { | |
3363 | value->un.di.low = CONST_DOUBLE_LOW (x); | |
3364 | value->un.di.high = CONST_DOUBLE_HIGH (x); | |
3365 | } | |
79e68feb RS |
3366 | break; |
3367 | ||
69ef87e2 AH |
3368 | case CONST_VECTOR: |
3369 | { | |
3370 | int units, i; | |
3371 | rtx elt; | |
3372 | ||
3373 | units = CONST_VECTOR_NUNITS (x); | |
3374 | value->kind = RTX_VECTOR; | |
3375 | value->mode = mode; | |
3376 | ||
3377 | for (i = 0; i < units; ++i) | |
3378 | { | |
3379 | elt = CONST_VECTOR_ELT (x, i); | |
3380 | if (GET_MODE_CLASS (mode) == MODE_VECTOR_INT) | |
3381 | { | |
3382 | value->un.veclo[i] = (HOST_WIDE_INT) INTVAL (elt); | |
3383 | value->un.vechi[i] = 0; | |
3384 | } | |
3385 | else if (GET_MODE_CLASS (mode) == MODE_VECTOR_FLOAT) | |
3386 | { | |
3387 | value->un.veclo[i] = (HOST_WIDE_INT) CONST_DOUBLE_LOW (elt); | |
3388 | value->un.vechi[i] = (HOST_WIDE_INT) CONST_DOUBLE_HIGH (elt); | |
3389 | } | |
3390 | else | |
3391 | abort (); | |
3392 | } | |
3393 | } | |
3394 | break; | |
3395 | ||
79e68feb RS |
3396 | case CONST_INT: |
3397 | value->un.addr.offset = INTVAL (x); | |
3398 | break; | |
3399 | ||
3400 | case SYMBOL_REF: | |
3401 | case LABEL_REF: | |
3d037392 | 3402 | case PC: |
79e68feb RS |
3403 | value->un.addr.base = x; |
3404 | break; | |
3405 | ||
3406 | case CONST: | |
3407 | x = XEXP (x, 0); | |
422be3c3 | 3408 | if (GET_CODE (x) == PLUS && GET_CODE (XEXP (x, 1)) == CONST_INT) |
79e68feb RS |
3409 | { |
3410 | value->un.addr.base = XEXP (x, 0); | |
79e68feb RS |
3411 | value->un.addr.offset = INTVAL (XEXP (x, 1)); |
3412 | } | |
422be3c3 | 3413 | else if (GET_CODE (x) == MINUS && GET_CODE (XEXP (x, 1)) == CONST_INT) |
79e68feb RS |
3414 | { |
3415 | value->un.addr.base = XEXP (x, 0); | |
79e68feb RS |
3416 | value->un.addr.offset = - INTVAL (XEXP (x, 1)); |
3417 | } | |
3418 | else | |
422be3c3 AO |
3419 | { |
3420 | value->un.addr.base = x; | |
3421 | value->un.addr.offset = 0; | |
3422 | } | |
79e68feb RS |
3423 | break; |
3424 | ||
3425 | default: | |
fdf473ae RH |
3426 | value->kind = RTX_UNKNOWN; |
3427 | break; | |
79e68feb RS |
3428 | } |
3429 | ||
fecaac37 HP |
3430 | if (value->kind == RTX_INT && value->un.addr.base != 0 |
3431 | && GET_CODE (value->un.addr.base) == UNSPEC) | |
c26fbbca | 3432 | { |
fecaac37 HP |
3433 | /* For a simple UNSPEC, the base is set to the |
3434 | operand, the kind field is set to the index of | |
c26fbbca | 3435 | the unspec expression. |
fecaac37 | 3436 | Together with the code below, in case that |
c26fbbca KH |
3437 | the operand is a SYMBOL_REF or LABEL_REF, |
3438 | the address of the string or the code_label | |
fecaac37 HP |
3439 | is taken as base. */ |
3440 | if (XVECLEN (value->un.addr.base, 0) == 1) | |
c26fbbca | 3441 | { |
fecaac37 HP |
3442 | value->kind = RTX_UNSPEC + XINT (value->un.addr.base, 1); |
3443 | value->un.addr.base = XVECEXP (value->un.addr.base, 0, 0); | |
3444 | } | |
3445 | } | |
3446 | ||
fdf473ae | 3447 | if (value->kind > RTX_DOUBLE && value->un.addr.base != 0) |
79e68feb RS |
3448 | switch (GET_CODE (value->un.addr.base)) |
3449 | { | |
3450 | case SYMBOL_REF: | |
79e68feb | 3451 | /* Use the string's address, not the SYMBOL_REF's address, |
241a1bcc | 3452 | for the sake of addresses of library routines. */ |
dd1bd863 | 3453 | value->un.addr.base = (rtx) XSTR (value->un.addr.base, 0); |
241a1bcc FS |
3454 | break; |
3455 | ||
3456 | case LABEL_REF: | |
3457 | /* For a LABEL_REF, compare labels. */ | |
79e68feb | 3458 | value->un.addr.base = XEXP (value->un.addr.base, 0); |
46f9491e | 3459 | |
e9a25f70 JL |
3460 | default: |
3461 | break; | |
79e68feb RS |
3462 | } |
3463 | } | |
3464 | ||
57632c51 RS |
3465 | /* Given a MINUS expression, simplify it if both sides |
3466 | include the same symbol. */ | |
3467 | ||
3468 | rtx | |
3469 | simplify_subtraction (x) | |
3470 | rtx x; | |
3471 | { | |
3472 | struct rtx_const val0, val1; | |
3473 | ||
3474 | decode_rtx_const (GET_MODE (x), XEXP (x, 0), &val0); | |
3475 | decode_rtx_const (GET_MODE (x), XEXP (x, 1), &val1); | |
3476 | ||
fdf473ae RH |
3477 | if (val0.kind > RTX_DOUBLE |
3478 | && val0.kind == val1.kind | |
fecaac37 | 3479 | && val0.un.addr.base == val1.un.addr.base) |
57632c51 | 3480 | return GEN_INT (val0.un.addr.offset - val1.un.addr.offset); |
fdf473ae | 3481 | |
57632c51 RS |
3482 | return x; |
3483 | } | |
3484 | ||
79e68feb RS |
3485 | /* Compute a hash code for a constant RTL expression. */ |
3486 | ||
5a13eaa4 | 3487 | static int |
79e68feb RS |
3488 | const_hash_rtx (mode, x) |
3489 | enum machine_mode mode; | |
3490 | rtx x; | |
3491 | { | |
b3694847 SS |
3492 | int hi; |
3493 | size_t i; | |
79e68feb RS |
3494 | |
3495 | struct rtx_const value; | |
3496 | decode_rtx_const (mode, x, &value); | |
3497 | ||
3498 | /* Compute hashing function */ | |
3499 | hi = 0; | |
3500 | for (i = 0; i < sizeof value / sizeof (int); i++) | |
3501 | hi += ((int *) &value)[i]; | |
3502 | ||
3503 | hi &= (1 << HASHBITS) - 1; | |
3504 | hi %= MAX_RTX_HASH_TABLE; | |
3505 | return hi; | |
3506 | } | |
3507 | ||
3508 | /* Compare a constant rtl object X with a constant-descriptor DESC. | |
3509 | Return 1 if DESC describes a constant with the same value as X. */ | |
3510 | ||
3511 | static int | |
3512 | compare_constant_rtx (mode, x, desc) | |
3513 | enum machine_mode mode; | |
3514 | rtx x; | |
3515 | struct constant_descriptor *desc; | |
3516 | { | |
b3694847 SS |
3517 | int *p = (int *) desc->u.contents; |
3518 | int *strp; | |
3519 | int len; | |
79e68feb RS |
3520 | struct rtx_const value; |
3521 | ||
3522 | decode_rtx_const (mode, x, &value); | |
3523 | strp = (int *) &value; | |
3524 | len = sizeof value / sizeof (int); | |
3525 | ||
3526 | /* Compare constant contents. */ | |
3527 | while (--len >= 0) | |
3528 | if (*p++ != *strp++) | |
3529 | return 0; | |
3530 | ||
3531 | return 1; | |
3532 | } | |
3533 | ||
3534 | /* Construct a constant descriptor for the rtl-expression X. | |
3535 | It is up to the caller to enter the descriptor in the hash table. */ | |
3536 | ||
3537 | static struct constant_descriptor * | |
3538 | record_constant_rtx (mode, x) | |
3539 | enum machine_mode mode; | |
3540 | rtx x; | |
3541 | { | |
3542 | struct constant_descriptor *ptr; | |
79e68feb | 3543 | |
46f9491e | 3544 | ptr = ((struct constant_descriptor *) |
37357796 RE |
3545 | xcalloc (1, (offsetof (struct constant_descriptor, u) |
3546 | + sizeof (struct rtx_const)))); | |
3547 | decode_rtx_const (mode, x, (struct rtx_const *) ptr->u.contents); | |
79e68feb | 3548 | |
1f8f4a0b | 3549 | return ptr; |
79e68feb RS |
3550 | } |
3551 | \f | |
03f54026 RK |
3552 | /* Given a constant rtx X, return a MEM for the location in memory at which |
3553 | this constant has been placed. Return 0 if it not has been placed yet. */ | |
3554 | ||
3555 | rtx | |
3556 | mem_for_const_double (x) | |
3557 | rtx x; | |
3558 | { | |
3559 | enum machine_mode mode = GET_MODE (x); | |
3560 | struct constant_descriptor *desc; | |
3561 | ||
3562 | for (desc = const_rtx_hash_table[const_hash_rtx (mode, x)]; desc; | |
3563 | desc = desc->next) | |
3564 | if (compare_constant_rtx (mode, x, desc)) | |
3565 | return desc->rtl; | |
3566 | ||
3567 | return 0; | |
3568 | } | |
c26fbbca | 3569 | |
79e68feb RS |
3570 | /* Given a constant rtx X, make (or find) a memory constant for its value |
3571 | and return a MEM rtx to refer to it in memory. */ | |
3572 | ||
3573 | rtx | |
3574 | force_const_mem (mode, x) | |
3575 | enum machine_mode mode; | |
3576 | rtx x; | |
3577 | { | |
b3694847 SS |
3578 | int hash; |
3579 | struct constant_descriptor *desc; | |
79e68feb | 3580 | char label[256]; |
79e68feb | 3581 | rtx def; |
a79e3a45 RK |
3582 | struct pool_constant *pool; |
3583 | unsigned int align; | |
79e68feb RS |
3584 | |
3585 | /* Compute hash code of X. Search the descriptors for that hash code | |
a79e3a45 | 3586 | to see if any of them describes X. If yes, we have an rtx to use. */ |
79e68feb | 3587 | hash = const_hash_rtx (mode, x); |
79e68feb RS |
3588 | for (desc = const_rtx_hash_table[hash]; desc; desc = desc->next) |
3589 | if (compare_constant_rtx (mode, x, desc)) | |
a79e3a45 RK |
3590 | return desc->rtl; |
3591 | ||
3592 | /* No constant equal to X is known to have been output. | |
3593 | Make a constant descriptor to enter X in the hash table | |
3594 | and make a MEM for it. */ | |
3595 | desc = record_constant_rtx (mode, x); | |
3596 | desc->next = const_rtx_hash_table[hash]; | |
3597 | const_rtx_hash_table[hash] = desc; | |
c26fbbca | 3598 | |
a79e3a45 RK |
3599 | /* Align the location counter as required by EXP's data type. */ |
3600 | align = GET_MODE_ALIGNMENT (mode == VOIDmode ? word_mode : mode); | |
e5e8a8bf | 3601 | #ifdef CONSTANT_ALIGNMENT |
b0c48229 NB |
3602 | align = CONSTANT_ALIGNMENT (make_tree ((*lang_hooks.types.type_for_mode) |
3603 | (mode, 0), x), align); | |
e5e8a8bf | 3604 | #endif |
79e68feb | 3605 | |
a79e3a45 RK |
3606 | pool_offset += (align / BITS_PER_UNIT) - 1; |
3607 | pool_offset &= ~ ((align / BITS_PER_UNIT) - 1); | |
3608 | ||
3609 | if (GET_CODE (x) == LABEL_REF) | |
3610 | LABEL_PRESERVE_P (XEXP (x, 0)) = 1; | |
3611 | ||
3612 | /* Allocate a pool constant descriptor, fill it in, and chain it in. */ | |
3613 | pool = (struct pool_constant *) ggc_alloc (sizeof (struct pool_constant)); | |
3614 | pool->desc = desc; | |
3615 | pool->constant = x; | |
3616 | pool->mode = mode; | |
3617 | pool->labelno = const_labelno; | |
3618 | pool->align = align; | |
3619 | pool->offset = pool_offset; | |
3620 | pool->mark = 1; | |
3621 | pool->next = 0; | |
3622 | ||
3623 | if (last_pool == 0) | |
3624 | first_pool = pool; | |
3625 | else | |
3626 | last_pool->next = pool; | |
c26fbbca | 3627 | |
a79e3a45 RK |
3628 | last_pool = pool; |
3629 | pool_offset += GET_MODE_SIZE (mode); | |
79e68feb | 3630 | |
a79e3a45 RK |
3631 | /* Create a string containing the label name, in LABEL. */ |
3632 | ASM_GENERATE_INTERNAL_LABEL (label, "LC", const_labelno); | |
79e68feb | 3633 | |
a79e3a45 | 3634 | ++const_labelno; |
79e68feb | 3635 | |
a79e3a45 | 3636 | /* Construct the SYMBOL_REF and the MEM. */ |
79e68feb | 3637 | |
a79e3a45 RK |
3638 | pool->desc->rtl = def |
3639 | = gen_rtx_MEM (mode, gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label))); | |
3640 | set_mem_alias_set (def, const_alias_set); | |
b0c48229 | 3641 | set_mem_attributes (def, (*lang_hooks.types.type_for_mode) (mode, 0), 1); |
79e68feb | 3642 | RTX_UNCHANGING_P (def) = 1; |
289c5b45 | 3643 | |
a79e3a45 RK |
3644 | /* Add label to symbol hash table. */ |
3645 | hash = SYMHASH (XSTR (XEXP (def, 0), 0)); | |
3646 | pool->next_sym = const_rtx_sym_hash_table[hash]; | |
3647 | const_rtx_sym_hash_table[hash] = pool; | |
3648 | ||
79e68feb RS |
3649 | /* Mark the symbol_ref as belonging to this constants pool. */ |
3650 | CONSTANT_POOL_ADDRESS_P (XEXP (def, 0)) = 1; | |
3651 | current_function_uses_const_pool = 1; | |
3652 | ||
79e68feb RS |
3653 | return def; |
3654 | } | |
3655 | \f | |
3656 | /* Given a SYMBOL_REF with CONSTANT_POOL_ADDRESS_P true, return a pointer to | |
3657 | the corresponding pool_constant structure. */ | |
3658 | ||
3659 | static struct pool_constant * | |
36edd3cc BS |
3660 | find_pool_constant (f, addr) |
3661 | struct function *f; | |
79e68feb RS |
3662 | rtx addr; |
3663 | { | |
94b01be3 | 3664 | struct pool_constant *pool; |
3cce094d | 3665 | const char *label = XSTR (addr, 0); |
79e68feb | 3666 | |
94b01be3 JJ |
3667 | for (pool = f->varasm->x_const_rtx_sym_hash_table[SYMHASH (label)]; pool; |
3668 | pool = pool->next_sym) | |
a79e3a45 | 3669 | if (XSTR (XEXP (pool->desc->rtl, 0), 0) == label) |
94b01be3 | 3670 | return pool; |
79e68feb RS |
3671 | |
3672 | abort (); | |
3673 | } | |
3674 | ||
3675 | /* Given a constant pool SYMBOL_REF, return the corresponding constant. */ | |
3676 | ||
3677 | rtx | |
3678 | get_pool_constant (addr) | |
3679 | rtx addr; | |
3680 | { | |
01d939e8 | 3681 | return (find_pool_constant (cfun, addr))->constant; |
36edd3cc BS |
3682 | } |
3683 | ||
149d6f9e JJ |
3684 | /* Given a constant pool SYMBOL_REF, return the corresponding constant |
3685 | and whether it has been output or not. */ | |
3686 | ||
3687 | rtx | |
3688 | get_pool_constant_mark (addr, pmarked) | |
3689 | rtx addr; | |
3690 | bool *pmarked; | |
3691 | { | |
3692 | struct pool_constant *pool = find_pool_constant (cfun, addr); | |
3693 | *pmarked = (pool->mark != 0); | |
3694 | return pool->constant; | |
3695 | } | |
3696 | ||
36edd3cc BS |
3697 | /* Likewise, but for the constant pool of a specific function. */ |
3698 | ||
3699 | rtx | |
3700 | get_pool_constant_for_function (f, addr) | |
3701 | struct function *f; | |
3702 | rtx addr; | |
3703 | { | |
3704 | return (find_pool_constant (f, addr))->constant; | |
79e68feb RS |
3705 | } |
3706 | ||
3707 | /* Similar, return the mode. */ | |
3708 | ||
3709 | enum machine_mode | |
3710 | get_pool_mode (addr) | |
3711 | rtx addr; | |
3712 | { | |
01d939e8 | 3713 | return (find_pool_constant (cfun, addr))->mode; |
36edd3cc BS |
3714 | } |
3715 | ||
3716 | enum machine_mode | |
3717 | get_pool_mode_for_function (f, addr) | |
3718 | struct function *f; | |
3719 | rtx addr; | |
3720 | { | |
3721 | return (find_pool_constant (f, addr))->mode; | |
79e68feb RS |
3722 | } |
3723 | ||
3724 | /* Similar, return the offset in the constant pool. */ | |
3725 | ||
3726 | int | |
3727 | get_pool_offset (addr) | |
3728 | rtx addr; | |
3729 | { | |
01d939e8 | 3730 | return (find_pool_constant (cfun, addr))->offset; |
79e68feb RS |
3731 | } |
3732 | ||
3733 | /* Return the size of the constant pool. */ | |
3734 | ||
3735 | int | |
3736 | get_pool_size () | |
3737 | { | |
3738 | return pool_offset; | |
3739 | } | |
3740 | \f | |
3741 | /* Write all the constants in the constant pool. */ | |
3742 | ||
3743 | void | |
3744 | output_constant_pool (fnname, fndecl) | |
c26fbbca KH |
3745 | const char *fnname ATTRIBUTE_UNUSED; |
3746 | tree fndecl ATTRIBUTE_UNUSED; | |
79e68feb RS |
3747 | { |
3748 | struct pool_constant *pool; | |
3749 | rtx x; | |
b216cd4a | 3750 | REAL_VALUE_TYPE r; |
79e68feb | 3751 | |
91674c37 ILT |
3752 | /* It is possible for gcc to call force_const_mem and then to later |
3753 | discard the instructions which refer to the constant. In such a | |
3754 | case we do not need to output the constant. */ | |
8f0e7be4 | 3755 | mark_constant_pool (); |
91674c37 | 3756 | |
79e68feb RS |
3757 | #ifdef ASM_OUTPUT_POOL_PROLOGUE |
3758 | ASM_OUTPUT_POOL_PROLOGUE (asm_out_file, fnname, fndecl, pool_offset); | |
3759 | #endif | |
3760 | ||
3761 | for (pool = first_pool; pool; pool = pool->next) | |
3762 | { | |
085ce8c6 RH |
3763 | rtx tmp; |
3764 | ||
79e68feb RS |
3765 | x = pool->constant; |
3766 | ||
d2ce9169 | 3767 | if (! pool->mark) |
91674c37 ILT |
3768 | continue; |
3769 | ||
79e68feb RS |
3770 | /* See if X is a LABEL_REF (or a CONST referring to a LABEL_REF) |
3771 | whose CODE_LABEL has been deleted. This can occur if a jump table | |
3772 | is eliminated by optimization. If so, write a constant of zero | |
7b2b3f1f RK |
3773 | instead. Note that this can also happen by turning the |
3774 | CODE_LABEL into a NOTE. */ | |
085ce8c6 RH |
3775 | /* ??? This seems completely and utterly wrong. Certainly it's |
3776 | not true for NOTE_INSN_DELETED_LABEL, but I disbelieve proper | |
3777 | functioning even with INSN_DELETED_P and friends. */ | |
3778 | ||
3779 | tmp = x; | |
3780 | switch (GET_CODE (x)) | |
3781 | { | |
3782 | case CONST: | |
3783 | if (GET_CODE (XEXP (x, 0)) != PLUS | |
3784 | || GET_CODE (XEXP (XEXP (x, 0), 0)) != LABEL_REF) | |
3785 | break; | |
3786 | tmp = XEXP (XEXP (x, 0), 0); | |
3787 | /* FALLTHRU */ | |
3788 | ||
3789 | case LABEL_REF: | |
3790 | tmp = XEXP (x, 0); | |
3791 | if (INSN_DELETED_P (tmp) | |
3792 | || (GET_CODE (tmp) == NOTE | |
3793 | && NOTE_LINE_NUMBER (tmp) == NOTE_INSN_DELETED)) | |
3794 | { | |
3795 | abort (); | |
3796 | x = const0_rtx; | |
3797 | } | |
3798 | break; | |
46f9491e | 3799 | |
085ce8c6 RH |
3800 | default: |
3801 | break; | |
3802 | } | |
79e68feb RS |
3803 | |
3804 | /* First switch to correct section. */ | |
b64a1b53 | 3805 | (*targetm.asm_out.select_rtx_section) (pool->mode, x, pool->align); |
79e68feb RS |
3806 | |
3807 | #ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY | |
3808 | ASM_OUTPUT_SPECIAL_POOL_ENTRY (asm_out_file, x, pool->mode, | |
3809 | pool->align, pool->labelno, done); | |
3810 | #endif | |
3811 | ||
09e07be6 | 3812 | assemble_align (pool->align); |
79e68feb RS |
3813 | |
3814 | /* Output the label. */ | |
3815 | ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LC", pool->labelno); | |
3816 | ||
3817 | /* Output the value of the constant itself. */ | |
3818 | switch (GET_MODE_CLASS (pool->mode)) | |
3819 | { | |
3820 | case MODE_FLOAT: | |
3821 | if (GET_CODE (x) != CONST_DOUBLE) | |
3822 | abort (); | |
3823 | ||
b216cd4a ZW |
3824 | REAL_VALUE_FROM_CONST_DOUBLE (r, x); |
3825 | assemble_real (r, pool->mode, pool->align); | |
79e68feb RS |
3826 | break; |
3827 | ||
3828 | case MODE_INT: | |
ab8ab9d0 | 3829 | case MODE_PARTIAL_INT: |
c8af3574 | 3830 | assemble_integer (x, GET_MODE_SIZE (pool->mode), pool->align, 1); |
79e68feb RS |
3831 | break; |
3832 | ||
69ef87e2 AH |
3833 | case MODE_VECTOR_FLOAT: |
3834 | { | |
3835 | int i, units; | |
3836 | rtx elt; | |
3837 | ||
3838 | if (GET_CODE (x) != CONST_VECTOR) | |
3839 | abort (); | |
3840 | ||
3841 | units = CONST_VECTOR_NUNITS (x); | |
3842 | ||
3843 | for (i = 0; i < units; i++) | |
3844 | { | |
3845 | elt = CONST_VECTOR_ELT (x, i); | |
b216cd4a ZW |
3846 | REAL_VALUE_FROM_CONST_DOUBLE (r, elt); |
3847 | assemble_real (r, GET_MODE_INNER (pool->mode), pool->align); | |
69ef87e2 AH |
3848 | } |
3849 | } | |
3850 | break; | |
3851 | ||
c26fbbca | 3852 | case MODE_VECTOR_INT: |
69ef87e2 AH |
3853 | { |
3854 | int i, units; | |
3855 | rtx elt; | |
3856 | ||
3857 | if (GET_CODE (x) != CONST_VECTOR) | |
3858 | abort (); | |
3859 | ||
3860 | units = CONST_VECTOR_NUNITS (x); | |
3861 | ||
3862 | for (i = 0; i < units; i++) | |
3863 | { | |
3864 | elt = CONST_VECTOR_ELT (x, i); | |
3865 | assemble_integer (elt, GET_MODE_UNIT_SIZE (pool->mode), | |
3866 | pool->align, 1); | |
3867 | } | |
3868 | } | |
3869 | break; | |
3870 | ||
79e68feb RS |
3871 | default: |
3872 | abort (); | |
3873 | } | |
3874 | ||
29a82058 JL |
3875 | #ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY |
3876 | done: ; | |
3877 | #endif | |
7f83c0e7 JL |
3878 | } |
3879 | ||
5c8c0abd ILT |
3880 | #ifdef ASM_OUTPUT_POOL_EPILOGUE |
3881 | ASM_OUTPUT_POOL_EPILOGUE (asm_out_file, fnname, fndecl, pool_offset); | |
3882 | #endif | |
3883 | ||
79e68feb RS |
3884 | /* Done with this pool. */ |
3885 | first_pool = last_pool = 0; | |
3886 | } | |
91674c37 ILT |
3887 | |
3888 | /* Look through the instructions for this function, and mark all the | |
fcbd8ef2 JO |
3889 | entries in the constant pool which are actually being used. |
3890 | Emit used deferred strings. */ | |
91674c37 ILT |
3891 | |
3892 | static void | |
3893 | mark_constant_pool () | |
3894 | { | |
b3694847 | 3895 | rtx insn; |
d2ce9169 | 3896 | struct pool_constant *pool; |
91674c37 | 3897 | |
bd7cf17e | 3898 | if (first_pool == 0 && htab_elements (const_str_htab) == 0) |
91674c37 ILT |
3899 | return; |
3900 | ||
d2ce9169 RK |
3901 | for (pool = first_pool; pool; pool = pool->next) |
3902 | pool->mark = 0; | |
3903 | ||
91674c37 | 3904 | for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) |
2c3c49de | 3905 | if (INSN_P (insn)) |
91674c37 ILT |
3906 | mark_constants (PATTERN (insn)); |
3907 | ||
3908 | for (insn = current_function_epilogue_delay_list; | |
3909 | insn; | |
3910 | insn = XEXP (insn, 1)) | |
2c3c49de | 3911 | if (INSN_P (insn)) |
91674c37 ILT |
3912 | mark_constants (PATTERN (insn)); |
3913 | } | |
3914 | ||
fcbd8ef2 JO |
3915 | /* Look through appropriate parts of X, marking all entries in the |
3916 | constant pool which are actually being used. Entries that are only | |
3917 | referenced by other constants are also marked as used. Emit | |
3918 | deferred strings that are used. */ | |
3919 | ||
91674c37 ILT |
3920 | static void |
3921 | mark_constants (x) | |
fcbd8ef2 | 3922 | rtx x; |
91674c37 | 3923 | { |
b3694847 SS |
3924 | int i; |
3925 | const char *format_ptr; | |
91674c37 ILT |
3926 | |
3927 | if (x == 0) | |
3928 | return; | |
3929 | ||
3930 | if (GET_CODE (x) == SYMBOL_REF) | |
3931 | { | |
fcbd8ef2 | 3932 | mark_constant (&x, NULL); |
91674c37 ILT |
3933 | return; |
3934 | } | |
3935 | ||
3936 | /* Insns may appear inside a SEQUENCE. Only check the patterns of | |
3937 | insns, not any notes that may be attached. We don't want to mark | |
3938 | a constant just because it happens to appear in a REG_EQUIV note. */ | |
2c3c49de | 3939 | if (INSN_P (x)) |
91674c37 ILT |
3940 | { |
3941 | mark_constants (PATTERN (x)); | |
3942 | return; | |
3943 | } | |
3944 | ||
3945 | format_ptr = GET_RTX_FORMAT (GET_CODE (x)); | |
3946 | ||
3947 | for (i = 0; i < GET_RTX_LENGTH (GET_CODE (x)); i++) | |
3948 | { | |
3949 | switch (*format_ptr++) | |
3950 | { | |
3951 | case 'e': | |
3952 | mark_constants (XEXP (x, i)); | |
3953 | break; | |
3954 | ||
3955 | case 'E': | |
3956 | if (XVEC (x, i) != 0) | |
3957 | { | |
b3694847 | 3958 | int j; |
91674c37 ILT |
3959 | |
3960 | for (j = 0; j < XVECLEN (x, i); j++) | |
3961 | mark_constants (XVECEXP (x, i, j)); | |
3962 | } | |
3963 | break; | |
3964 | ||
3965 | case 'S': | |
3966 | case 's': | |
3967 | case '0': | |
3968 | case 'i': | |
3969 | case 'w': | |
3970 | case 'n': | |
3971 | case 'u': | |
3972 | break; | |
3973 | ||
3974 | default: | |
3975 | abort (); | |
3976 | } | |
3977 | } | |
3978 | } | |
fcbd8ef2 JO |
3979 | |
3980 | /* Given a SYMBOL_REF CURRENT_RTX, mark it and all constants it refers | |
3981 | to as used. Emit referenced deferred strings. This function can | |
a79e3a45 | 3982 | be used with for_each_rtx to mark all SYMBOL_REFs in an rtx. */ |
fcbd8ef2 JO |
3983 | |
3984 | static int | |
3985 | mark_constant (current_rtx, data) | |
3986 | rtx *current_rtx; | |
3987 | void *data ATTRIBUTE_UNUSED; | |
3988 | { | |
3989 | rtx x = *current_rtx; | |
3990 | ||
3991 | if (x == NULL_RTX) | |
3992 | return 0; | |
a79e3a45 | 3993 | |
fcbd8ef2 JO |
3994 | else if (GET_CODE (x) == SYMBOL_REF) |
3995 | { | |
3996 | if (CONSTANT_POOL_ADDRESS_P (x)) | |
3997 | { | |
3998 | struct pool_constant *pool = find_pool_constant (cfun, x); | |
c26fbbca KH |
3999 | if (pool->mark == 0) |
4000 | { | |
4001 | pool->mark = 1; | |
4002 | for_each_rtx (&(pool->constant), &mark_constant, NULL); | |
4003 | } | |
fcbd8ef2 JO |
4004 | else |
4005 | return -1; | |
4006 | } | |
4007 | else if (STRING_POOL_ADDRESS_P (x)) | |
4008 | { | |
4009 | struct deferred_string **defstr; | |
4010 | ||
4011 | defstr = (struct deferred_string **) | |
4012 | htab_find_slot_with_hash (const_str_htab, XSTR (x, 0), | |
4013 | STRHASH (XSTR (x, 0)), NO_INSERT); | |
4014 | if (defstr) | |
4015 | { | |
4016 | struct deferred_string *p = *defstr; | |
4017 | ||
4018 | STRING_POOL_ADDRESS_P (x) = 0; | |
4019 | output_constant_def_contents (p->exp, 0, p->labelno); | |
4020 | htab_clear_slot (const_str_htab, (void **) defstr); | |
4021 | } | |
4022 | } | |
4023 | } | |
4024 | return 0; | |
4025 | } | |
79e68feb RS |
4026 | \f |
4027 | /* Find all the constants whose addresses are referenced inside of EXP, | |
4028 | and make sure assembler code with a label has been output for each one. | |
4029 | Indicate whether an ADDR_EXPR has been encountered. */ | |
4030 | ||
5a13eaa4 | 4031 | static int |
79e68feb RS |
4032 | output_addressed_constants (exp) |
4033 | tree exp; | |
4034 | { | |
4035 | int reloc = 0; | |
ac79cd5a | 4036 | tree tem; |
79e68feb | 4037 | |
c165f94f CC |
4038 | /* Give the front-end a chance to convert VALUE to something that |
4039 | looks more like a constant to the back-end. */ | |
ac79cd5a | 4040 | exp = (*lang_hooks.expand_constant) (exp); |
c165f94f | 4041 | |
79e68feb RS |
4042 | switch (TREE_CODE (exp)) |
4043 | { | |
4044 | case ADDR_EXPR: | |
ac79cd5a RK |
4045 | /* Go inside any operations that get_inner_reference can handle and see |
4046 | if what's inside is a constant: no need to do anything here for | |
4047 | addresses of variables or functions. */ | |
4048 | for (tem = TREE_OPERAND (exp, 0); handled_component_p (tem); | |
4049 | tem = TREE_OPERAND (tem, 0)) | |
4050 | ; | |
79e68feb | 4051 | |
ac79cd5a RK |
4052 | if (TREE_CODE_CLASS (TREE_CODE (tem)) == 'c' |
4053 | || TREE_CODE (tem) == CONSTRUCTOR) | |
4054 | output_constant_def (tem, 0); | |
79e68feb | 4055 | |
d2c35e67 JH |
4056 | if (TREE_PUBLIC (tem)) |
4057 | reloc |= 2; | |
4058 | else | |
4059 | reloc |= 1; | |
79e68feb RS |
4060 | break; |
4061 | ||
4062 | case PLUS_EXPR: | |
4063 | case MINUS_EXPR: | |
4064 | reloc = output_addressed_constants (TREE_OPERAND (exp, 0)); | |
4065 | reloc |= output_addressed_constants (TREE_OPERAND (exp, 1)); | |
4066 | break; | |
4067 | ||
4068 | case NOP_EXPR: | |
4069 | case CONVERT_EXPR: | |
37a52112 | 4070 | case NON_LVALUE_EXPR: |
79e68feb RS |
4071 | reloc = output_addressed_constants (TREE_OPERAND (exp, 0)); |
4072 | break; | |
4073 | ||
4074 | case CONSTRUCTOR: | |
ac79cd5a RK |
4075 | for (tem = CONSTRUCTOR_ELTS (exp); tem; tem = TREE_CHAIN (tem)) |
4076 | if (TREE_VALUE (tem) != 0) | |
c26fbbca | 4077 | reloc |= output_addressed_constants (TREE_VALUE (tem)); |
ac79cd5a | 4078 | |
79e68feb RS |
4079 | break; |
4080 | ||
e9a25f70 | 4081 | default: |
79e68feb RS |
4082 | break; |
4083 | } | |
4084 | return reloc; | |
4085 | } | |
4086 | \f | |
14a774a9 RK |
4087 | /* Return nonzero if VALUE is a valid constant-valued expression |
4088 | for use in initializing a static variable; one that can be an | |
4089 | element of a "constant" initializer. | |
4090 | ||
4091 | Return null_pointer_node if the value is absolute; | |
4092 | if it is relocatable, return the variable that determines the relocation. | |
4093 | We assume that VALUE has been folded as much as possible; | |
4094 | therefore, we do not need to check for such things as | |
4095 | arithmetic-combinations of integers. */ | |
4096 | ||
4097 | tree | |
4098 | initializer_constant_valid_p (value, endtype) | |
4099 | tree value; | |
4100 | tree endtype; | |
4101 | { | |
99740276 MM |
4102 | /* Give the front-end a chance to convert VALUE to something that |
4103 | looks more like a constant to the back-end. */ | |
ac79cd5a | 4104 | value = (*lang_hooks.expand_constant) (value); |
99740276 | 4105 | |
14a774a9 RK |
4106 | switch (TREE_CODE (value)) |
4107 | { | |
4108 | case CONSTRUCTOR: | |
4109 | if ((TREE_CODE (TREE_TYPE (value)) == UNION_TYPE | |
4110 | || TREE_CODE (TREE_TYPE (value)) == RECORD_TYPE) | |
4111 | && TREE_CONSTANT (value) | |
4112 | && CONSTRUCTOR_ELTS (value)) | |
4113 | return | |
4114 | initializer_constant_valid_p (TREE_VALUE (CONSTRUCTOR_ELTS (value)), | |
4115 | endtype); | |
46f9491e | 4116 | |
14a774a9 RK |
4117 | return TREE_STATIC (value) ? null_pointer_node : 0; |
4118 | ||
4119 | case INTEGER_CST: | |
69ef87e2 | 4120 | case VECTOR_CST: |
14a774a9 RK |
4121 | case REAL_CST: |
4122 | case STRING_CST: | |
4123 | case COMPLEX_CST: | |
4124 | return null_pointer_node; | |
4125 | ||
4126 | case ADDR_EXPR: | |
67231816 | 4127 | case FDESC_EXPR: |
8c8de5fc | 4128 | return staticp (TREE_OPERAND (value, 0)) ? TREE_OPERAND (value, 0) : 0; |
14a774a9 | 4129 | |
ed239f5a | 4130 | case VIEW_CONVERT_EXPR: |
14a774a9 RK |
4131 | case NON_LVALUE_EXPR: |
4132 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype); | |
4133 | ||
4134 | case CONVERT_EXPR: | |
4135 | case NOP_EXPR: | |
4136 | /* Allow conversions between pointer types. */ | |
4137 | if (POINTER_TYPE_P (TREE_TYPE (value)) | |
4138 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
4139 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype); | |
4140 | ||
4141 | /* Allow conversions between real types. */ | |
4142 | if (FLOAT_TYPE_P (TREE_TYPE (value)) | |
4143 | && FLOAT_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
4144 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype); | |
4145 | ||
4146 | /* Allow length-preserving conversions between integer types. */ | |
4147 | if (INTEGRAL_TYPE_P (TREE_TYPE (value)) | |
4148 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0))) | |
4149 | && (TYPE_PRECISION (TREE_TYPE (value)) | |
4150 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (value, 0))))) | |
4151 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype); | |
4152 | ||
4153 | /* Allow conversions between other integer types only if | |
4154 | explicit value. */ | |
4155 | if (INTEGRAL_TYPE_P (TREE_TYPE (value)) | |
4156 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
4157 | { | |
4158 | tree inner = initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
4159 | endtype); | |
4160 | if (inner == null_pointer_node) | |
4161 | return null_pointer_node; | |
4162 | break; | |
4163 | } | |
4164 | ||
4165 | /* Allow (int) &foo provided int is as wide as a pointer. */ | |
4166 | if (INTEGRAL_TYPE_P (TREE_TYPE (value)) | |
4167 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0))) | |
4168 | && (TYPE_PRECISION (TREE_TYPE (value)) | |
4169 | >= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (value, 0))))) | |
4170 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
4171 | endtype); | |
4172 | ||
4173 | /* Likewise conversions from int to pointers, but also allow | |
4174 | conversions from 0. */ | |
4175 | if (POINTER_TYPE_P (TREE_TYPE (value)) | |
4176 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
4177 | { | |
4178 | if (integer_zerop (TREE_OPERAND (value, 0))) | |
4179 | return null_pointer_node; | |
4180 | else if (TYPE_PRECISION (TREE_TYPE (value)) | |
4181 | <= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
4182 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
4183 | endtype); | |
4184 | } | |
4185 | ||
4186 | /* Allow conversions to union types if the value inside is okay. */ | |
4187 | if (TREE_CODE (TREE_TYPE (value)) == UNION_TYPE) | |
4188 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
4189 | endtype); | |
4190 | break; | |
4191 | ||
4192 | case PLUS_EXPR: | |
4193 | if (! INTEGRAL_TYPE_P (endtype) | |
4194 | || TYPE_PRECISION (endtype) >= POINTER_SIZE) | |
c26fbbca | 4195 | { |
14a774a9 RK |
4196 | tree valid0 = initializer_constant_valid_p (TREE_OPERAND (value, 0), |
4197 | endtype); | |
4198 | tree valid1 = initializer_constant_valid_p (TREE_OPERAND (value, 1), | |
4199 | endtype); | |
4200 | /* If either term is absolute, use the other terms relocation. */ | |
4201 | if (valid0 == null_pointer_node) | |
4202 | return valid1; | |
4203 | if (valid1 == null_pointer_node) | |
4204 | return valid0; | |
c26fbbca | 4205 | } |
14a774a9 RK |
4206 | break; |
4207 | ||
4208 | case MINUS_EXPR: | |
4209 | if (! INTEGRAL_TYPE_P (endtype) | |
4210 | || TYPE_PRECISION (endtype) >= POINTER_SIZE) | |
4211 | { | |
4212 | tree valid0 = initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
4213 | endtype); | |
4214 | tree valid1 = initializer_constant_valid_p (TREE_OPERAND (value, 1), | |
4215 | endtype); | |
4216 | /* Win if second argument is absolute. */ | |
4217 | if (valid1 == null_pointer_node) | |
4218 | return valid0; | |
4219 | /* Win if both arguments have the same relocation. | |
4220 | Then the value is absolute. */ | |
4221 | if (valid0 == valid1 && valid0 != 0) | |
4222 | return null_pointer_node; | |
212addfa JO |
4223 | |
4224 | /* Since GCC guarantees that string constants are unique in the | |
4225 | generated code, a subtraction between two copies of the same | |
4226 | constant string is absolute. */ | |
4227 | if (valid0 && TREE_CODE (valid0) == STRING_CST && | |
4228 | valid1 && TREE_CODE (valid1) == STRING_CST && | |
4229 | TREE_STRING_POINTER (valid0) == TREE_STRING_POINTER (valid1)) | |
4230 | return null_pointer_node; | |
14a774a9 RK |
4231 | } |
4232 | ||
4233 | /* Support differences between labels. */ | |
4234 | if (INTEGRAL_TYPE_P (endtype)) | |
4235 | { | |
4236 | tree op0, op1; | |
4237 | op0 = TREE_OPERAND (value, 0); | |
4238 | op1 = TREE_OPERAND (value, 1); | |
fdf473ae RH |
4239 | |
4240 | /* Like STRIP_NOPS except allow the operand mode to widen. | |
4241 | This works around a feature of fold that simplfies | |
4242 | (int)(p1 - p2) to ((int)p1 - (int)p2) under the theory | |
4243 | that the narrower operation is cheaper. */ | |
4244 | ||
4245 | while (TREE_CODE (op0) == NOP_EXPR | |
4246 | || TREE_CODE (op0) == CONVERT_EXPR | |
4247 | || TREE_CODE (op0) == NON_LVALUE_EXPR) | |
4248 | { | |
4249 | tree inner = TREE_OPERAND (op0, 0); | |
4250 | if (inner == error_mark_node | |
4251 | || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner))) | |
4252 | || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op0))) | |
4253 | > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner))))) | |
4254 | break; | |
4255 | op0 = inner; | |
4256 | } | |
4257 | ||
4258 | while (TREE_CODE (op1) == NOP_EXPR | |
4259 | || TREE_CODE (op1) == CONVERT_EXPR | |
4260 | || TREE_CODE (op1) == NON_LVALUE_EXPR) | |
4261 | { | |
4262 | tree inner = TREE_OPERAND (op1, 0); | |
4263 | if (inner == error_mark_node | |
4264 | || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner))) | |
4265 | || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op1))) | |
4266 | > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner))))) | |
4267 | break; | |
4268 | op1 = inner; | |
4269 | } | |
14a774a9 RK |
4270 | |
4271 | if (TREE_CODE (op0) == ADDR_EXPR | |
4272 | && TREE_CODE (TREE_OPERAND (op0, 0)) == LABEL_DECL | |
4273 | && TREE_CODE (op1) == ADDR_EXPR | |
4274 | && TREE_CODE (TREE_OPERAND (op1, 0)) == LABEL_DECL) | |
4275 | return null_pointer_node; | |
4276 | } | |
4277 | break; | |
4278 | ||
4279 | default: | |
4280 | break; | |
4281 | } | |
4282 | ||
4283 | return 0; | |
4284 | } | |
4285 | \f | |
79e68feb RS |
4286 | /* Output assembler code for constant EXP to FILE, with no label. |
4287 | This includes the pseudo-op such as ".int" or ".byte", and a newline. | |
4288 | Assumes output_addressed_constants has been done on EXP already. | |
4289 | ||
4290 | Generate exactly SIZE bytes of assembler data, padding at the end | |
4291 | with zeros if necessary. SIZE must always be specified. | |
4292 | ||
4293 | SIZE is important for structure constructors, | |
4294 | since trailing members may have been omitted from the constructor. | |
4295 | It is also important for initialization of arrays from string constants | |
4296 | since the full length of the string constant might not be wanted. | |
4297 | It is also needed for initialization of unions, where the initializer's | |
4298 | type is just one member, and that may not be as long as the union. | |
4299 | ||
4300 | There a case in which we would fail to output exactly SIZE bytes: | |
4301 | for a structure constructor that wants to produce more than SIZE bytes. | |
c8af3574 RH |
4302 | But such constructors will never be generated for any possible input. |
4303 | ||
4304 | ALIGN is the alignment of the data in bits. */ | |
79e68feb RS |
4305 | |
4306 | void | |
c8af3574 RH |
4307 | output_constant (exp, size, align) |
4308 | tree exp; | |
ac79cd5a | 4309 | HOST_WIDE_INT size; |
c8af3574 | 4310 | unsigned int align; |
79e68feb | 4311 | { |
ac79cd5a RK |
4312 | enum tree_code code; |
4313 | HOST_WIDE_INT thissize; | |
79e68feb | 4314 | |
ed239f5a RK |
4315 | /* Some front-ends use constants other than the standard language-indepdent |
4316 | varieties, but which may still be output directly. Give the front-end a | |
4317 | chance to convert EXP to a language-independent representation. */ | |
ac79cd5a | 4318 | exp = (*lang_hooks.expand_constant) (exp); |
e697e20a | 4319 | |
e9996db7 | 4320 | if (size == 0 || flag_syntax_only) |
79e68feb RS |
4321 | return; |
4322 | ||
ac79cd5a RK |
4323 | /* Eliminate any conversions since we'll be outputting the underlying |
4324 | constant. */ | |
4325 | while (TREE_CODE (exp) == NOP_EXPR || TREE_CODE (exp) == CONVERT_EXPR | |
ed239f5a RK |
4326 | || TREE_CODE (exp) == NON_LVALUE_EXPR |
4327 | || TREE_CODE (exp) == VIEW_CONVERT_EXPR) | |
ac79cd5a RK |
4328 | exp = TREE_OPERAND (exp, 0); |
4329 | ||
4330 | code = TREE_CODE (TREE_TYPE (exp)); | |
4331 | thissize = int_size_in_bytes (TREE_TYPE (exp)); | |
be1ad04c | 4332 | |
fff9e713 MT |
4333 | /* Allow a constructor with no elements for any data type. |
4334 | This means to fill the space with zeros. */ | |
77fa0940 | 4335 | if (TREE_CODE (exp) == CONSTRUCTOR && CONSTRUCTOR_ELTS (exp) == 0) |
fff9e713 | 4336 | { |
b93a436e | 4337 | assemble_zeros (size); |
fff9e713 MT |
4338 | return; |
4339 | } | |
4340 | ||
67231816 RH |
4341 | if (TREE_CODE (exp) == FDESC_EXPR) |
4342 | { | |
f42f3c2d | 4343 | #ifdef ASM_OUTPUT_FDESC |
67231816 RH |
4344 | HOST_WIDE_INT part = tree_low_cst (TREE_OPERAND (exp, 1), 0); |
4345 | tree decl = TREE_OPERAND (exp, 0); | |
67231816 RH |
4346 | ASM_OUTPUT_FDESC (asm_out_file, decl, part); |
4347 | #else | |
4348 | abort (); | |
4349 | #endif | |
4350 | return; | |
4351 | } | |
4352 | ||
ac79cd5a RK |
4353 | /* Now output the underlying data. If we've handling the padding, return. |
4354 | Otherwise, break and ensure THISSIZE is the size written. */ | |
79e68feb RS |
4355 | switch (code) |
4356 | { | |
644ea577 RS |
4357 | case CHAR_TYPE: |
4358 | case BOOLEAN_TYPE: | |
79e68feb RS |
4359 | case INTEGER_TYPE: |
4360 | case ENUMERAL_TYPE: | |
4361 | case POINTER_TYPE: | |
4362 | case REFERENCE_TYPE: | |
37366632 | 4363 | if (! assemble_integer (expand_expr (exp, NULL_RTX, VOIDmode, |
79e68feb | 4364 | EXPAND_INITIALIZER), |
c8af3574 | 4365 | size, align, 0)) |
79e68feb | 4366 | error ("initializer for integer value is too complicated"); |
79e68feb RS |
4367 | break; |
4368 | ||
4369 | case REAL_TYPE: | |
4370 | if (TREE_CODE (exp) != REAL_CST) | |
4371 | error ("initializer for floating value is not a floating constant"); | |
4372 | ||
4373 | assemble_real (TREE_REAL_CST (exp), | |
c8af3574 RH |
4374 | mode_for_size (size * BITS_PER_UNIT, MODE_FLOAT, 0), |
4375 | align); | |
79e68feb RS |
4376 | break; |
4377 | ||
4378 | case COMPLEX_TYPE: | |
ac79cd5a RK |
4379 | output_constant (TREE_REALPART (exp), thissize / 2, align); |
4380 | output_constant (TREE_IMAGPART (exp), thissize / 2, | |
4381 | min_align (align, BITS_PER_UNIT * (thissize / 2))); | |
79e68feb RS |
4382 | break; |
4383 | ||
4384 | case ARRAY_TYPE: | |
e6834654 | 4385 | case VECTOR_TYPE: |
79e68feb RS |
4386 | if (TREE_CODE (exp) == CONSTRUCTOR) |
4387 | { | |
c8af3574 | 4388 | output_constructor (exp, size, align); |
79e68feb RS |
4389 | return; |
4390 | } | |
4391 | else if (TREE_CODE (exp) == STRING_CST) | |
4392 | { | |
ac79cd5a RK |
4393 | thissize = MIN (TREE_STRING_LENGTH (exp), size); |
4394 | assemble_string (TREE_STRING_POINTER (exp), thissize); | |
79e68feb RS |
4395 | } |
4396 | else | |
4397 | abort (); | |
4398 | break; | |
4399 | ||
4400 | case RECORD_TYPE: | |
4401 | case UNION_TYPE: | |
4402 | if (TREE_CODE (exp) == CONSTRUCTOR) | |
c8af3574 | 4403 | output_constructor (exp, size, align); |
79e68feb RS |
4404 | else |
4405 | abort (); | |
4406 | return; | |
474bda6c PB |
4407 | |
4408 | case SET_TYPE: | |
4409 | if (TREE_CODE (exp) == INTEGER_CST) | |
4410 | assemble_integer (expand_expr (exp, NULL_RTX, | |
4411 | VOIDmode, EXPAND_INITIALIZER), | |
c26fbbca | 4412 | thissize, align, 1); |
474bda6c PB |
4413 | else if (TREE_CODE (exp) == CONSTRUCTOR) |
4414 | { | |
ac79cd5a RK |
4415 | unsigned char *buffer = (unsigned char *) alloca (thissize); |
4416 | if (get_set_constructor_bytes (exp, buffer, thissize)) | |
474bda6c | 4417 | abort (); |
ac79cd5a | 4418 | assemble_string ((char *) buffer, thissize); |
474bda6c PB |
4419 | } |
4420 | else | |
4421 | error ("unknown set constructor type"); | |
4422 | return; | |
e9a25f70 | 4423 | |
0974a3b8 RK |
4424 | case ERROR_MARK: |
4425 | return; | |
4426 | ||
e9a25f70 | 4427 | default: |
ac79cd5a | 4428 | abort (); |
79e68feb RS |
4429 | } |
4430 | ||
ac79cd5a | 4431 | size -= thissize; |
79e68feb RS |
4432 | if (size > 0) |
4433 | assemble_zeros (size); | |
4434 | } | |
ca695ac9 | 4435 | |
79e68feb | 4436 | \f |
a25f1211 RH |
4437 | /* Subroutine of output_constructor, used for computing the size of |
4438 | arrays of unspecified length. VAL must be a CONSTRUCTOR of an array | |
4439 | type with an unspecified upper bound. */ | |
4440 | ||
ffc5c6a9 | 4441 | static unsigned HOST_WIDE_INT |
a25f1211 RH |
4442 | array_size_for_constructor (val) |
4443 | tree val; | |
4444 | { | |
4445 | tree max_index, i; | |
4446 | ||
ac79cd5a RK |
4447 | /* This code used to attempt to handle string constants that are not |
4448 | arrays of single-bytes, but nothing else does, so there's no point in | |
4449 | doing it here. */ | |
b6fc7110 | 4450 | if (TREE_CODE (val) == STRING_CST) |
ac79cd5a RK |
4451 | return TREE_STRING_LENGTH (val); |
4452 | ||
a25f1211 | 4453 | max_index = NULL_TREE; |
c26fbbca | 4454 | for (i = CONSTRUCTOR_ELTS (val); i; i = TREE_CHAIN (i)) |
a25f1211 RH |
4455 | { |
4456 | tree index = TREE_PURPOSE (i); | |
4457 | ||
4458 | if (TREE_CODE (index) == RANGE_EXPR) | |
4459 | index = TREE_OPERAND (index, 1); | |
4460 | if (max_index == NULL_TREE || tree_int_cst_lt (max_index, index)) | |
4461 | max_index = index; | |
4462 | } | |
4463 | ||
a25f1211 | 4464 | if (max_index == NULL_TREE) |
ffc5c6a9 | 4465 | return 0; |
a25f1211 RH |
4466 | |
4467 | /* Compute the total number of array elements. */ | |
46f9491e | 4468 | i = size_binop (MINUS_EXPR, convert (sizetype, max_index), |
ffc5c6a9 RH |
4469 | convert (sizetype, |
4470 | TYPE_MIN_VALUE (TYPE_DOMAIN (TREE_TYPE (val))))); | |
4471 | i = size_binop (PLUS_EXPR, i, convert (sizetype, integer_one_node)); | |
a25f1211 RH |
4472 | |
4473 | /* Multiply by the array element unit size to find number of bytes. */ | |
ffc5c6a9 | 4474 | i = size_binop (MULT_EXPR, i, TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (val)))); |
a25f1211 RH |
4475 | |
4476 | return tree_low_cst (i, 1); | |
4477 | } | |
4478 | ||
4479 | /* Subroutine of output_constant, used for CONSTRUCTORs (aggregate constants). | |
79e68feb RS |
4480 | Generate at least SIZE bytes, padding if necessary. */ |
4481 | ||
5a13eaa4 | 4482 | static void |
c8af3574 | 4483 | output_constructor (exp, size, align) |
79e68feb | 4484 | tree exp; |
ac79cd5a | 4485 | HOST_WIDE_INT size; |
c8af3574 | 4486 | unsigned int align; |
79e68feb | 4487 | { |
85f3d674 | 4488 | tree type = TREE_TYPE (exp); |
b3694847 | 4489 | tree link, field = 0; |
85f3d674 | 4490 | tree min_index = 0; |
79e68feb RS |
4491 | /* Number of bytes output or skipped so far. |
4492 | In other words, current position within the constructor. */ | |
85f3d674 | 4493 | HOST_WIDE_INT total_bytes = 0; |
79e68feb RS |
4494 | /* Non-zero means BYTE contains part of a byte, to be output. */ |
4495 | int byte_buffer_in_use = 0; | |
b3694847 | 4496 | int byte = 0; |
79e68feb | 4497 | |
37366632 | 4498 | if (HOST_BITS_PER_WIDE_INT < BITS_PER_UNIT) |
79e68feb RS |
4499 | abort (); |
4500 | ||
85f3d674 RK |
4501 | if (TREE_CODE (type) == RECORD_TYPE) |
4502 | field = TYPE_FIELDS (type); | |
79e68feb | 4503 | |
85f3d674 RK |
4504 | if (TREE_CODE (type) == ARRAY_TYPE |
4505 | && TYPE_DOMAIN (type) != 0) | |
4506 | min_index = TYPE_MIN_VALUE (TYPE_DOMAIN (type)); | |
13b457e7 | 4507 | |
79e68feb RS |
4508 | /* As LINK goes through the elements of the constant, |
4509 | FIELD goes through the structure fields, if the constant is a structure. | |
4510 | if the constant is a union, then we override this, | |
4511 | by getting the field from the TREE_LIST element. | |
43f7bed5 VM |
4512 | But the constant could also be an array. Then FIELD is zero. |
4513 | ||
4514 | There is always a maximum of one element in the chain LINK for unions | |
4515 | (even if the initializer in a source program incorrectly contains | |
2d76cb1a | 4516 | more one). */ |
79e68feb RS |
4517 | for (link = CONSTRUCTOR_ELTS (exp); |
4518 | link; | |
4519 | link = TREE_CHAIN (link), | |
4520 | field = field ? TREE_CHAIN (field) : 0) | |
4521 | { | |
4522 | tree val = TREE_VALUE (link); | |
3181cbfd RS |
4523 | tree index = 0; |
4524 | ||
85f3d674 RK |
4525 | /* The element in a union constructor specifies the proper field |
4526 | or index. */ | |
4527 | if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE | |
4528 | || TREE_CODE (type) == QUAL_UNION_TYPE) | |
4529 | && TREE_PURPOSE (link) != 0) | |
4530 | field = TREE_PURPOSE (link); | |
3181cbfd | 4531 | |
85f3d674 | 4532 | else if (TREE_CODE (type) == ARRAY_TYPE) |
3181cbfd RS |
4533 | index = TREE_PURPOSE (link); |
4534 | ||
79e68feb | 4535 | /* Eliminate the marker that makes a cast not be an lvalue. */ |
d964285c CH |
4536 | if (val != 0) |
4537 | STRIP_NOPS (val); | |
79e68feb | 4538 | |
8311a11f PB |
4539 | if (index && TREE_CODE (index) == RANGE_EXPR) |
4540 | { | |
bf1aaf0a | 4541 | unsigned HOST_WIDE_INT fieldsize |
85f3d674 RK |
4542 | = int_size_in_bytes (TREE_TYPE (type)); |
4543 | HOST_WIDE_INT lo_index = tree_low_cst (TREE_OPERAND (index, 0), 0); | |
4544 | HOST_WIDE_INT hi_index = tree_low_cst (TREE_OPERAND (index, 1), 0); | |
8311a11f | 4545 | HOST_WIDE_INT index; |
c8af3574 | 4546 | unsigned int align2 = min_align (align, fieldsize * BITS_PER_UNIT); |
85f3d674 | 4547 | |
8311a11f PB |
4548 | for (index = lo_index; index <= hi_index; index++) |
4549 | { | |
4550 | /* Output the element's initial value. */ | |
4551 | if (val == 0) | |
4552 | assemble_zeros (fieldsize); | |
4553 | else | |
c8af3574 | 4554 | output_constant (val, fieldsize, align2); |
8311a11f PB |
4555 | |
4556 | /* Count its size. */ | |
4557 | total_bytes += fieldsize; | |
4558 | } | |
4559 | } | |
4560 | else if (field == 0 || !DECL_BIT_FIELD (field)) | |
79e68feb | 4561 | { |
3181cbfd RS |
4562 | /* An element that is not a bit-field. */ |
4563 | ||
bf1aaf0a | 4564 | unsigned HOST_WIDE_INT fieldsize; |
79e68feb RS |
4565 | /* Since this structure is static, |
4566 | we know the positions are constant. */ | |
85f3d674 | 4567 | HOST_WIDE_INT pos = field ? int_byte_position (field) : 0; |
c8af3574 | 4568 | unsigned int align2; |
770ae6cc | 4569 | |
3181cbfd | 4570 | if (index != 0) |
85f3d674 RK |
4571 | pos = (tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (val)), 1) |
4572 | * (tree_low_cst (index, 0) - tree_low_cst (min_index, 0))); | |
79e68feb | 4573 | |
3181cbfd | 4574 | /* Output any buffered-up bit-fields preceding this element. */ |
79e68feb RS |
4575 | if (byte_buffer_in_use) |
4576 | { | |
eac50d7a | 4577 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); |
79e68feb RS |
4578 | total_bytes++; |
4579 | byte_buffer_in_use = 0; | |
4580 | } | |
4581 | ||
4582 | /* Advance to offset of this element. | |
4583 | Note no alignment needed in an array, since that is guaranteed | |
4584 | if each element has the proper size. */ | |
85f3d674 | 4585 | if ((field != 0 || index != 0) && pos != total_bytes) |
79e68feb | 4586 | { |
85f3d674 RK |
4587 | assemble_zeros (pos - total_bytes); |
4588 | total_bytes = pos; | |
79e68feb | 4589 | } |
ca2eed21 | 4590 | |
c8af3574 RH |
4591 | /* Find the alignment of this element. */ |
4592 | align2 = min_align (align, BITS_PER_UNIT * pos); | |
46f9491e | 4593 | |
79e68feb RS |
4594 | /* Determine size this element should occupy. */ |
4595 | if (field) | |
a25f1211 | 4596 | { |
ffc5c6a9 RH |
4597 | fieldsize = 0; |
4598 | ||
4599 | /* If this is an array with an unspecified upper bound, | |
4600 | the initializer determines the size. */ | |
4601 | /* ??? This ought to only checked if DECL_SIZE_UNIT is NULL, | |
4602 | but we cannot do this until the deprecated support for | |
4603 | initializing zero-length array members is removed. */ | |
4604 | if (TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE | |
4605 | && TYPE_DOMAIN (TREE_TYPE (field)) | |
4606 | && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (field)))) | |
4607 | { | |
a25f1211 | 4608 | fieldsize = array_size_for_constructor (val); |
ffc5c6a9 RH |
4609 | /* Given a non-empty initialization, this field had |
4610 | better be last. */ | |
4611 | if (fieldsize != 0 && TREE_CHAIN (field) != NULL_TREE) | |
4612 | abort (); | |
4613 | } | |
4614 | else if (DECL_SIZE_UNIT (field)) | |
4615 | { | |
4616 | /* ??? This can't be right. If the decl size overflows | |
4617 | a host integer we will silently emit no data. */ | |
4618 | if (host_integerp (DECL_SIZE_UNIT (field), 1)) | |
4619 | fieldsize = tree_low_cst (DECL_SIZE_UNIT (field), 1); | |
4620 | } | |
a25f1211 | 4621 | } |
79e68feb | 4622 | else |
85f3d674 | 4623 | fieldsize = int_size_in_bytes (TREE_TYPE (type)); |
79e68feb RS |
4624 | |
4625 | /* Output the element's initial value. */ | |
4626 | if (val == 0) | |
4627 | assemble_zeros (fieldsize); | |
4628 | else | |
c8af3574 | 4629 | output_constant (val, fieldsize, align2); |
79e68feb RS |
4630 | |
4631 | /* Count its size. */ | |
4632 | total_bytes += fieldsize; | |
4633 | } | |
4634 | else if (val != 0 && TREE_CODE (val) != INTEGER_CST) | |
4635 | error ("invalid initial value for member `%s'", | |
4636 | IDENTIFIER_POINTER (DECL_NAME (field))); | |
4637 | else | |
4638 | { | |
4639 | /* Element that is a bit-field. */ | |
4640 | ||
770ae6cc RK |
4641 | HOST_WIDE_INT next_offset = int_bit_position (field); |
4642 | HOST_WIDE_INT end_offset | |
4643 | = (next_offset + tree_low_cst (DECL_SIZE (field), 1)); | |
79e68feb RS |
4644 | |
4645 | if (val == 0) | |
4646 | val = integer_zero_node; | |
4647 | ||
4648 | /* If this field does not start in this (or, next) byte, | |
4649 | skip some bytes. */ | |
4650 | if (next_offset / BITS_PER_UNIT != total_bytes) | |
4651 | { | |
4652 | /* Output remnant of any bit field in previous bytes. */ | |
4653 | if (byte_buffer_in_use) | |
4654 | { | |
eac50d7a | 4655 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); |
79e68feb RS |
4656 | total_bytes++; |
4657 | byte_buffer_in_use = 0; | |
4658 | } | |
4659 | ||
4660 | /* If still not at proper byte, advance to there. */ | |
4661 | if (next_offset / BITS_PER_UNIT != total_bytes) | |
4662 | { | |
4663 | assemble_zeros (next_offset / BITS_PER_UNIT - total_bytes); | |
4664 | total_bytes = next_offset / BITS_PER_UNIT; | |
4665 | } | |
4666 | } | |
4667 | ||
4668 | if (! byte_buffer_in_use) | |
4669 | byte = 0; | |
4670 | ||
4671 | /* We must split the element into pieces that fall within | |
4672 | separate bytes, and combine each byte with previous or | |
4673 | following bit-fields. */ | |
4674 | ||
b4ac57ab | 4675 | /* next_offset is the offset n fbits from the beginning of |
79e68feb RS |
4676 | the structure to the next bit of this element to be processed. |
4677 | end_offset is the offset of the first bit past the end of | |
4678 | this element. */ | |
4679 | while (next_offset < end_offset) | |
4680 | { | |
4681 | int this_time; | |
e7105755 JW |
4682 | int shift; |
4683 | HOST_WIDE_INT value; | |
85f3d674 RK |
4684 | HOST_WIDE_INT next_byte = next_offset / BITS_PER_UNIT; |
4685 | HOST_WIDE_INT next_bit = next_offset % BITS_PER_UNIT; | |
79e68feb RS |
4686 | |
4687 | /* Advance from byte to byte | |
4688 | within this element when necessary. */ | |
4689 | while (next_byte != total_bytes) | |
4690 | { | |
eac50d7a | 4691 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); |
79e68feb RS |
4692 | total_bytes++; |
4693 | byte = 0; | |
4694 | } | |
4695 | ||
4696 | /* Number of bits we can process at once | |
4697 | (all part of the same byte). */ | |
4698 | this_time = MIN (end_offset - next_offset, | |
4699 | BITS_PER_UNIT - next_bit); | |
f76b9db2 | 4700 | if (BYTES_BIG_ENDIAN) |
79e68feb | 4701 | { |
f76b9db2 ILT |
4702 | /* On big-endian machine, take the most significant bits |
4703 | first (of the bits that are significant) | |
4704 | and put them into bytes from the most significant end. */ | |
4705 | shift = end_offset - next_offset - this_time; | |
85f3d674 | 4706 | |
f76b9db2 | 4707 | /* Don't try to take a bunch of bits that cross |
dfb2c079 HB |
4708 | the word boundary in the INTEGER_CST. We can |
4709 | only select bits from the LOW or HIGH part | |
4710 | not from both. */ | |
f76b9db2 ILT |
4711 | if (shift < HOST_BITS_PER_WIDE_INT |
4712 | && shift + this_time > HOST_BITS_PER_WIDE_INT) | |
4713 | { | |
8b1cb95b GK |
4714 | this_time = shift + this_time - HOST_BITS_PER_WIDE_INT; |
4715 | shift = HOST_BITS_PER_WIDE_INT; | |
f76b9db2 ILT |
4716 | } |
4717 | ||
4718 | /* Now get the bits from the appropriate constant word. */ | |
4719 | if (shift < HOST_BITS_PER_WIDE_INT) | |
85f3d674 | 4720 | value = TREE_INT_CST_LOW (val); |
f76b9db2 ILT |
4721 | else if (shift < 2 * HOST_BITS_PER_WIDE_INT) |
4722 | { | |
4723 | value = TREE_INT_CST_HIGH (val); | |
4724 | shift -= HOST_BITS_PER_WIDE_INT; | |
4725 | } | |
4726 | else | |
4727 | abort (); | |
85f3d674 | 4728 | |
dfb2c079 HB |
4729 | /* Get the result. This works only when: |
4730 | 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */ | |
f76b9db2 | 4731 | byte |= (((value >> shift) |
dfb2c079 | 4732 | & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1)) |
f76b9db2 | 4733 | << (BITS_PER_UNIT - this_time - next_bit)); |
79e68feb RS |
4734 | } |
4735 | else | |
79e68feb | 4736 | { |
f76b9db2 ILT |
4737 | /* On little-endian machines, |
4738 | take first the least significant bits of the value | |
4739 | and pack them starting at the least significant | |
4740 | bits of the bytes. */ | |
770ae6cc RK |
4741 | shift = next_offset - int_bit_position (field); |
4742 | ||
f76b9db2 | 4743 | /* Don't try to take a bunch of bits that cross |
dfb2c079 HB |
4744 | the word boundary in the INTEGER_CST. We can |
4745 | only select bits from the LOW or HIGH part | |
4746 | not from both. */ | |
f76b9db2 ILT |
4747 | if (shift < HOST_BITS_PER_WIDE_INT |
4748 | && shift + this_time > HOST_BITS_PER_WIDE_INT) | |
770ae6cc | 4749 | this_time = (HOST_BITS_PER_WIDE_INT - shift); |
f76b9db2 ILT |
4750 | |
4751 | /* Now get the bits from the appropriate constant word. */ | |
e9a25f70 | 4752 | if (shift < HOST_BITS_PER_WIDE_INT) |
f76b9db2 ILT |
4753 | value = TREE_INT_CST_LOW (val); |
4754 | else if (shift < 2 * HOST_BITS_PER_WIDE_INT) | |
4755 | { | |
4756 | value = TREE_INT_CST_HIGH (val); | |
4757 | shift -= HOST_BITS_PER_WIDE_INT; | |
4758 | } | |
4759 | else | |
4760 | abort (); | |
770ae6cc | 4761 | |
dfb2c079 HB |
4762 | /* Get the result. This works only when: |
4763 | 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */ | |
f76b9db2 | 4764 | byte |= (((value >> shift) |
dfb2c079 | 4765 | & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1)) |
f76b9db2 | 4766 | << next_bit); |
79e68feb | 4767 | } |
85f3d674 | 4768 | |
79e68feb RS |
4769 | next_offset += this_time; |
4770 | byte_buffer_in_use = 1; | |
4771 | } | |
4772 | } | |
4773 | } | |
85f3d674 | 4774 | |
79e68feb RS |
4775 | if (byte_buffer_in_use) |
4776 | { | |
eac50d7a | 4777 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); |
79e68feb RS |
4778 | total_bytes++; |
4779 | } | |
85f3d674 | 4780 | |
79e68feb RS |
4781 | if (total_bytes < size) |
4782 | assemble_zeros (size - total_bytes); | |
4783 | } | |
ca695ac9 | 4784 | |
ecb0eece | 4785 | /* This TREE_LIST contains any weak symbol declarations waiting |
46f9491e | 4786 | to be emitted. */ |
ecb0eece | 4787 | static tree weak_decls; |
0e9264a2 | 4788 | |
f90bf7ca MM |
4789 | /* Mark DECL as weak. */ |
4790 | ||
4791 | static void | |
4792 | mark_weak (decl) | |
4793 | tree decl; | |
4794 | { | |
4795 | DECL_WEAK (decl) = 1; | |
4796 | ||
4797 | if (DECL_RTL_SET_P (decl) | |
4798 | && GET_CODE (DECL_RTL (decl)) == MEM | |
4799 | && XEXP (DECL_RTL (decl), 0) | |
4800 | && GET_CODE (XEXP (DECL_RTL (decl), 0)) == SYMBOL_REF) | |
4801 | SYMBOL_REF_WEAK (XEXP (DECL_RTL (decl), 0)) = 1; | |
4802 | } | |
4803 | ||
45806a3f FS |
4804 | /* Merge weak status between NEWDECL and OLDDECL. */ |
4805 | ||
4806 | void | |
4807 | merge_weak (newdecl, olddecl) | |
4808 | tree newdecl; | |
4809 | tree olddecl; | |
4810 | { | |
45806a3f FS |
4811 | if (DECL_WEAK (newdecl) == DECL_WEAK (olddecl)) |
4812 | return; | |
4813 | ||
f90bf7ca MM |
4814 | if (DECL_WEAK (newdecl)) |
4815 | { | |
4816 | tree wd; | |
4817 | ||
4818 | /* NEWDECL is weak, but OLDDECL is not. */ | |
4819 | ||
4820 | /* If we already output the OLDDECL, we're in trouble; we can't | |
4821 | go back and make it weak. This error cannot caught in | |
4822 | declare_weak because the NEWDECL and OLDDECL was not yet | |
4823 | been merged; therefore, TREE_ASM_WRITTEN was not set. */ | |
14285ace | 4824 | if (TREE_ASM_WRITTEN (olddecl)) |
f90bf7ca MM |
4825 | error_with_decl (newdecl, |
4826 | "weak declaration of `%s' must precede definition"); | |
14285ace RH |
4827 | |
4828 | /* If we've already generated rtl referencing OLDDECL, we may | |
4829 | have done so in a way that will not function properly with | |
4830 | a weak symbol. */ | |
4831 | else if (TREE_USED (olddecl) | |
34fb9ba5 | 4832 | && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (olddecl))) |
14285ace RH |
4833 | warning_with_decl (newdecl, "weak declaration of `%s' after first use results in unspecified behavior"); |
4834 | ||
f90bf7ca MM |
4835 | if (SUPPORTS_WEAK) |
4836 | { | |
4837 | /* We put the NEWDECL on the weak_decls list at some point. | |
4838 | Replace it with the OLDDECL. */ | |
4839 | for (wd = weak_decls; wd; wd = TREE_CHAIN (wd)) | |
4840 | if (TREE_VALUE (wd) == newdecl) | |
4841 | { | |
4842 | TREE_VALUE (wd) = olddecl; | |
4843 | break; | |
4844 | } | |
4845 | /* We may not find the entry on the list. If NEWDECL is a | |
4846 | weak alias, then we will have already called | |
4847 | globalize_decl to remove the entry; in that case, we do | |
4848 | not need to do anything. */ | |
4849 | } | |
45806a3f | 4850 | |
f90bf7ca MM |
4851 | /* Make the OLDDECL weak; it's OLDDECL that we'll be keeping. */ |
4852 | mark_weak (olddecl); | |
4853 | } | |
4854 | else | |
4855 | /* OLDDECL was weak, but NEWDECL was not explicitly marked as | |
4856 | weak. Just update NEWDECL to indicate that it's weak too. */ | |
4857 | mark_weak (newdecl); | |
45806a3f FS |
4858 | } |
4859 | ||
4b8af8d9 JM |
4860 | /* Declare DECL to be a weak symbol. */ |
4861 | ||
4862 | void | |
4863 | declare_weak (decl) | |
4864 | tree decl; | |
4865 | { | |
4866 | if (! TREE_PUBLIC (decl)) | |
4867 | error_with_decl (decl, "weak declaration of `%s' must be public"); | |
45806a3f | 4868 | else if (TREE_CODE (decl) == FUNCTION_DECL && TREE_ASM_WRITTEN (decl)) |
daefd78b JM |
4869 | error_with_decl (decl, "weak declaration of `%s' must precede definition"); |
4870 | else if (SUPPORTS_WEAK) | |
ecb0eece RH |
4871 | { |
4872 | if (! DECL_WEAK (decl)) | |
4873 | weak_decls = tree_cons (NULL, decl, weak_decls); | |
4874 | } | |
4ae08f95 JM |
4875 | else |
4876 | warning_with_decl (decl, "weak declaration of `%s' not supported"); | |
4877 | ||
f90bf7ca | 4878 | mark_weak (decl); |
4b8af8d9 JM |
4879 | } |
4880 | ||
4881 | /* Emit any pending weak declarations. */ | |
4882 | ||
4883 | void | |
4884 | weak_finish () | |
4885 | { | |
ecb0eece RH |
4886 | tree t; |
4887 | ||
c26fbbca | 4888 | for (t = weak_decls; t; t = TREE_CHAIN (t)) |
4b8af8d9 | 4889 | { |
ecb0eece RH |
4890 | tree decl = TREE_VALUE (t); |
4891 | const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
4892 | ||
4893 | if (! TREE_USED (decl)) | |
4894 | continue; | |
4895 | ||
79c4e63f | 4896 | #ifdef ASM_WEAKEN_DECL |
ecb0eece | 4897 | ASM_WEAKEN_DECL (asm_out_file, decl, name, NULL); |
4ae08f95 JM |
4898 | #else |
4899 | #ifdef ASM_WEAKEN_LABEL | |
ecb0eece RH |
4900 | ASM_WEAKEN_LABEL (asm_out_file, name); |
4901 | #else | |
4902 | #ifdef ASM_OUTPUT_WEAK_ALIAS | |
4903 | warning ("only weak aliases are supported in this configuration"); | |
4904 | return; | |
4ae08f95 | 4905 | #endif |
79c4e63f | 4906 | #endif |
4ae08f95 | 4907 | #endif |
4b8af8d9 | 4908 | } |
4b8af8d9 | 4909 | } |
4ae08f95 | 4910 | |
19c5b1cf JM |
4911 | /* Emit the assembly bits to indicate that DECL is globally visible. */ |
4912 | ||
4913 | static void | |
4914 | globalize_decl (decl) | |
4915 | tree decl; | |
4916 | { | |
f9d09ae5 | 4917 | const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0); |
19c5b1cf JM |
4918 | |
4919 | #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL) | |
4920 | if (DECL_WEAK (decl)) | |
4921 | { | |
ecb0eece RH |
4922 | tree *p, t; |
4923 | ||
19c5b1cf JM |
4924 | #ifdef ASM_WEAKEN_DECL |
4925 | ASM_WEAKEN_DECL (asm_out_file, decl, name, 0); | |
4926 | #else | |
4927 | ASM_WEAKEN_LABEL (asm_out_file, name); | |
4928 | #endif | |
ecb0eece | 4929 | |
19c5b1cf JM |
4930 | /* Remove this function from the pending weak list so that |
4931 | we do not emit multiple .weak directives for it. */ | |
a81eed10 FS |
4932 | for (p = &weak_decls; (t = *p) ; ) |
4933 | { | |
4934 | if (DECL_ASSEMBLER_NAME (decl) == DECL_ASSEMBLER_NAME (TREE_VALUE (t))) | |
ecb0eece | 4935 | *p = TREE_CHAIN (t); |
a81eed10 FS |
4936 | else |
4937 | p = &TREE_CHAIN (t); | |
4938 | } | |
19c5b1cf JM |
4939 | return; |
4940 | } | |
19c5b1cf | 4941 | #endif |
ecb0eece | 4942 | |
19c5b1cf JM |
4943 | ASM_GLOBALIZE_LABEL (asm_out_file, name); |
4944 | } | |
4945 | ||
4ae08f95 JM |
4946 | /* Emit an assembler directive to make the symbol for DECL an alias to |
4947 | the symbol for TARGET. */ | |
4b8af8d9 JM |
4948 | |
4949 | void | |
4950 | assemble_alias (decl, target) | |
91813b28 | 4951 | tree decl, target ATTRIBUTE_UNUSED; |
4b8af8d9 | 4952 | { |
3cce094d | 4953 | const char *name; |
4b8af8d9 | 4954 | |
9ea07fd0 JW |
4955 | /* We must force creation of DECL_RTL for debug info generation, even though |
4956 | we don't use it here. */ | |
6496a589 | 4957 | make_decl_rtl (decl, NULL); |
9ea07fd0 | 4958 | |
19e7881c | 4959 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); |
4b8af8d9 | 4960 | |
4927276d | 4961 | #ifdef ASM_OUTPUT_DEF |
4b8af8d9 JM |
4962 | /* Make name accessible from other files, if appropriate. */ |
4963 | ||
4964 | if (TREE_PUBLIC (decl)) | |
4965 | { | |
19c5b1cf | 4966 | globalize_decl (decl); |
b14707c3 | 4967 | maybe_assemble_visibility (decl); |
4b8af8d9 JM |
4968 | } |
4969 | ||
e4faf1eb NC |
4970 | #ifdef ASM_OUTPUT_DEF_FROM_DECLS |
4971 | ASM_OUTPUT_DEF_FROM_DECLS (asm_out_file, decl, target); | |
4972 | #else | |
4b8af8d9 | 4973 | ASM_OUTPUT_DEF (asm_out_file, name, IDENTIFIER_POINTER (target)); |
e4faf1eb | 4974 | #endif |
79c4e63f AM |
4975 | #else /* !ASM_OUTPUT_DEF */ |
4976 | #if defined (ASM_OUTPUT_WEAK_ALIAS) || defined (ASM_WEAKEN_DECL) | |
4927276d JM |
4977 | if (! DECL_WEAK (decl)) |
4978 | warning ("only weak aliases are supported in this configuration"); | |
4979 | ||
79c4e63f AM |
4980 | #ifdef ASM_WEAKEN_DECL |
4981 | ASM_WEAKEN_DECL (asm_out_file, decl, name, IDENTIFIER_POINTER (target)); | |
4982 | #else | |
4927276d | 4983 | ASM_OUTPUT_WEAK_ALIAS (asm_out_file, name, IDENTIFIER_POINTER (target)); |
79c4e63f | 4984 | #endif |
4927276d JM |
4985 | #else |
4986 | warning ("alias definitions not supported in this configuration; ignored"); | |
4987 | #endif | |
4b8af8d9 | 4988 | #endif |
14285ace RH |
4989 | |
4990 | TREE_USED (decl) = 1; | |
4991 | TREE_ASM_WRITTEN (decl) = 1; | |
4992 | TREE_ASM_WRITTEN (DECL_ASSEMBLER_NAME (decl)) = 1; | |
4b8af8d9 | 4993 | } |
f796d997 | 4994 | |
47bd70b5 JJ |
4995 | /* Emit an assembler directive to set symbol for DECL visibility to |
4996 | VISIBILITY_TYPE. */ | |
4997 | ||
4998 | void | |
4999 | assemble_visibility (decl, visibility_type) | |
5000 | tree decl; | |
5001 | const char *visibility_type ATTRIBUTE_UNUSED; | |
5002 | { | |
5003 | const char *name; | |
5004 | ||
5005 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
5006 | ||
5007 | #ifdef HAVE_GAS_HIDDEN | |
5008 | fprintf (asm_out_file, "\t.%s\t%s\n", visibility_type, name); | |
5009 | #else | |
5010 | warning ("visibility attribute not supported in this configuration; ignored"); | |
5011 | #endif | |
5012 | } | |
5013 | ||
b14707c3 RH |
5014 | /* A helper function to call assemble_visibility when needed for a decl. */ |
5015 | ||
5016 | static void | |
5017 | maybe_assemble_visibility (decl) | |
5018 | tree decl; | |
5019 | { | |
5020 | tree visibility = lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)); | |
5021 | if (visibility) | |
5022 | { | |
5023 | const char *type | |
5024 | = TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (visibility))); | |
5025 | assemble_visibility (decl, type); | |
5026 | } | |
5027 | } | |
5028 | ||
f796d997 JM |
5029 | /* Returns 1 if the target configuration supports defining public symbols |
5030 | so that one of them will be chosen at link time instead of generating a | |
5031 | multiply-defined symbol error, whether through the use of weak symbols or | |
5032 | a target-specific mechanism for having duplicates discarded. */ | |
5033 | ||
5034 | int | |
5035 | supports_one_only () | |
5036 | { | |
5037 | if (SUPPORTS_ONE_ONLY) | |
5038 | return 1; | |
5039 | return SUPPORTS_WEAK; | |
5040 | } | |
5041 | ||
5042 | /* Set up DECL as a public symbol that can be defined in multiple | |
5043 | translation units without generating a linker error. */ | |
5044 | ||
5045 | void | |
5046 | make_decl_one_only (decl) | |
5047 | tree decl; | |
5048 | { | |
5049 | if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL) | |
5050 | abort (); | |
5051 | ||
5052 | TREE_PUBLIC (decl) = 1; | |
5053 | ||
5054 | if (TREE_CODE (decl) == VAR_DECL | |
5055 | && (DECL_INITIAL (decl) == 0 || DECL_INITIAL (decl) == error_mark_node)) | |
5056 | DECL_COMMON (decl) = 1; | |
5057 | else if (SUPPORTS_ONE_ONLY) | |
5058 | { | |
5059 | #ifdef MAKE_DECL_ONE_ONLY | |
5060 | MAKE_DECL_ONE_ONLY (decl); | |
5061 | #endif | |
5062 | DECL_ONE_ONLY (decl) = 1; | |
5063 | } | |
5064 | else if (SUPPORTS_WEAK) | |
5065 | DECL_WEAK (decl) = 1; | |
5066 | else | |
5067 | abort (); | |
5068 | } | |
76095e2f RH |
5069 | |
5070 | void | |
5071 | init_varasm_once () | |
5072 | { | |
bd7cf17e | 5073 | const_str_htab = htab_create (128, const_str_htab_hash, const_str_htab_eq, |
c26fbbca | 5074 | const_str_htab_del); |
715bdd29 RH |
5075 | in_named_htab = htab_create (31, in_named_entry_hash, |
5076 | in_named_entry_eq, NULL); | |
5077 | ||
14a774a9 | 5078 | ggc_add_root (const_hash_table, MAX_HASH_TABLE, sizeof const_hash_table[0], |
76095e2f | 5079 | mark_const_hash_entry); |
bd7cf17e JJ |
5080 | ggc_add_root (&const_str_htab, 1, sizeof const_str_htab, |
5081 | mark_const_str_htab); | |
ecb0eece | 5082 | ggc_add_tree_root (&weak_decls, 1); |
a79e3a45 RK |
5083 | |
5084 | const_alias_set = new_alias_set (); | |
76095e2f | 5085 | } |
7c262518 RH |
5086 | |
5087 | /* Select a set of attributes for section NAME based on the properties | |
5088 | of DECL and whether or not RELOC indicates that DECL's initializer | |
5089 | might contain runtime relocations. | |
5090 | ||
5091 | We make the section read-only and executable for a function decl, | |
715bdd29 | 5092 | read-only for a const data decl, and writable for a non-const data decl. */ |
7c262518 RH |
5093 | |
5094 | unsigned int | |
5095 | default_section_type_flags (decl, name, reloc) | |
5096 | tree decl; | |
5097 | const char *name; | |
5098 | int reloc; | |
5099 | { | |
7c262518 | 5100 | unsigned int flags; |
7c262518 RH |
5101 | |
5102 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) | |
5103 | flags = SECTION_CODE; | |
5104 | else if (decl && DECL_READONLY_SECTION (decl, reloc)) | |
5105 | flags = 0; | |
5106 | else | |
5107 | flags = SECTION_WRITE; | |
5108 | ||
5109 | if (decl && DECL_ONE_ONLY (decl)) | |
5110 | flags |= SECTION_LINKONCE; | |
5111 | ||
6f001fdf | 5112 | if (decl && TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL (decl)) |
c711ba8e RH |
5113 | flags |= SECTION_TLS | SECTION_WRITE; |
5114 | ||
7c262518 RH |
5115 | if (strcmp (name, ".bss") == 0 |
5116 | || strncmp (name, ".bss.", 5) == 0 | |
5117 | || strncmp (name, ".gnu.linkonce.b.", 16) == 0 | |
5118 | || strcmp (name, ".sbss") == 0 | |
5119 | || strncmp (name, ".sbss.", 6) == 0 | |
3d78f2e9 | 5120 | || strncmp (name, ".gnu.linkonce.sb.", 17) == 0 |
c711ba8e RH |
5121 | || strcmp (name, ".tbss") == 0 |
5122 | || strncmp (name, ".gnu.linkonce.tb.", 17) == 0) | |
7c262518 RH |
5123 | flags |= SECTION_BSS; |
5124 | ||
3d78f2e9 | 5125 | if (strcmp (name, ".tdata") == 0 |
c711ba8e RH |
5126 | || strcmp (name, ".tbss") == 0 |
5127 | || strncmp (name, ".gnu.linkonce.td.", 17) == 0 | |
5128 | || strncmp (name, ".gnu.linkonce.tb.", 17) == 0) | |
3d78f2e9 RH |
5129 | flags |= SECTION_TLS; |
5130 | ||
7c262518 RH |
5131 | return flags; |
5132 | } | |
5133 | ||
5134 | /* Output assembly to switch to section NAME with attribute FLAGS. | |
5135 | Four variants for common object file formats. */ | |
5136 | ||
5137 | void | |
715bdd29 | 5138 | default_no_named_section (name, flags) |
7c262518 RH |
5139 | const char *name ATTRIBUTE_UNUSED; |
5140 | unsigned int flags ATTRIBUTE_UNUSED; | |
7c262518 RH |
5141 | { |
5142 | /* Some object formats don't support named sections at all. The | |
5143 | front-end should already have flagged this as an error. */ | |
5144 | abort (); | |
5145 | } | |
5146 | ||
5147 | void | |
715bdd29 | 5148 | default_elf_asm_named_section (name, flags) |
7c262518 RH |
5149 | const char *name; |
5150 | unsigned int flags; | |
7c262518 | 5151 | { |
201556f0 | 5152 | char flagchars[10], *f = flagchars; |
7c262518 RH |
5153 | const char *type; |
5154 | ||
a8c01a59 RL |
5155 | if (! named_section_first_declaration (name)) |
5156 | { | |
5157 | fprintf (asm_out_file, "\t.section\t%s\n", name); | |
5158 | return; | |
5159 | } | |
5160 | ||
7c262518 RH |
5161 | if (!(flags & SECTION_DEBUG)) |
5162 | *f++ = 'a'; | |
5163 | if (flags & SECTION_WRITE) | |
5164 | *f++ = 'w'; | |
5165 | if (flags & SECTION_CODE) | |
5166 | *f++ = 'x'; | |
5167 | if (flags & SECTION_SMALL) | |
5168 | *f++ = 's'; | |
201556f0 JJ |
5169 | if (flags & SECTION_MERGE) |
5170 | *f++ = 'M'; | |
5171 | if (flags & SECTION_STRINGS) | |
5172 | *f++ = 'S'; | |
3d78f2e9 RH |
5173 | if (flags & SECTION_TLS) |
5174 | *f++ = 'T'; | |
7c262518 RH |
5175 | *f = '\0'; |
5176 | ||
5177 | if (flags & SECTION_BSS) | |
5178 | type = "nobits"; | |
5179 | else | |
5180 | type = "progbits"; | |
5181 | ||
201556f0 JJ |
5182 | if (flags & SECTION_ENTSIZE) |
5183 | fprintf (asm_out_file, "\t.section\t%s,\"%s\",@%s,%d\n", | |
5184 | name, flagchars, type, flags & SECTION_ENTSIZE); | |
5185 | else | |
5186 | fprintf (asm_out_file, "\t.section\t%s,\"%s\",@%s\n", | |
5187 | name, flagchars, type); | |
7c262518 RH |
5188 | } |
5189 | ||
5190 | void | |
715bdd29 | 5191 | default_coff_asm_named_section (name, flags) |
7c262518 RH |
5192 | const char *name; |
5193 | unsigned int flags; | |
7c262518 RH |
5194 | { |
5195 | char flagchars[8], *f = flagchars; | |
5196 | ||
5197 | if (flags & SECTION_WRITE) | |
5198 | *f++ = 'w'; | |
5199 | if (flags & SECTION_CODE) | |
5200 | *f++ = 'x'; | |
5201 | *f = '\0'; | |
5202 | ||
5203 | fprintf (asm_out_file, "\t.section\t%s,\"%s\"\n", name, flagchars); | |
5204 | } | |
5205 | ||
5206 | void | |
715bdd29 | 5207 | default_pe_asm_named_section (name, flags) |
7c262518 RH |
5208 | const char *name; |
5209 | unsigned int flags; | |
7c262518 | 5210 | { |
715bdd29 | 5211 | default_coff_asm_named_section (name, flags); |
7c262518 RH |
5212 | |
5213 | if (flags & SECTION_LINKONCE) | |
5214 | { | |
5215 | /* Functions may have been compiled at various levels of | |
5216 | optimization so we can't use `same_size' here. | |
5217 | Instead, have the linker pick one. */ | |
5218 | fprintf (asm_out_file, "\t.linkonce %s\n", | |
5219 | (flags & SECTION_CODE ? "discard" : "same_size")); | |
5220 | } | |
5221 | } | |
4a8d0c9c RH |
5222 | \f |
5223 | /* Used for vtable gc in GNU binutils. Record that the pointer at OFFSET | |
5224 | from SYMBOL is used in all classes derived from SYMBOL. */ | |
5225 | ||
5226 | void | |
5227 | assemble_vtable_entry (symbol, offset) | |
5228 | rtx symbol; | |
5229 | HOST_WIDE_INT offset; | |
5230 | { | |
5231 | fputs ("\t.vtable_entry ", asm_out_file); | |
5232 | output_addr_const (asm_out_file, symbol); | |
5233 | fputs (", ", asm_out_file); | |
5234 | fprintf (asm_out_file, HOST_WIDE_INT_PRINT_DEC, offset); | |
5235 | fputc ('\n', asm_out_file); | |
5236 | } | |
5237 | ||
684d9f3b | 5238 | /* Used for vtable gc in GNU binutils. Record the class hierarchy by noting |
4a8d0c9c RH |
5239 | that the vtable symbol CHILD is derived from the vtable symbol PARENT. */ |
5240 | ||
5241 | void | |
5242 | assemble_vtable_inherit (child, parent) | |
5243 | rtx child, parent; | |
5244 | { | |
5245 | fputs ("\t.vtable_inherit ", asm_out_file); | |
5246 | output_addr_const (asm_out_file, child); | |
5247 | fputs (", ", asm_out_file); | |
5248 | output_addr_const (asm_out_file, parent); | |
5249 | fputc ('\n', asm_out_file); | |
5250 | } | |
ae46c4e0 RH |
5251 | \f |
5252 | /* The lame default section selector. */ | |
5253 | ||
5254 | void | |
5255 | default_select_section (decl, reloc, align) | |
5256 | tree decl; | |
5257 | int reloc; | |
5258 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED; | |
5259 | { | |
5260 | bool readonly = false; | |
5261 | ||
5262 | if (DECL_P (decl)) | |
5263 | { | |
5264 | if (DECL_READONLY_SECTION (decl, reloc)) | |
5265 | readonly = true; | |
5266 | } | |
5267 | else if (TREE_CODE (decl) == CONSTRUCTOR) | |
5268 | { | |
5269 | if (! ((flag_pic && reloc) | |
5270 | || !TREE_READONLY (decl) | |
5271 | || TREE_SIDE_EFFECTS (decl) | |
5272 | || !TREE_CONSTANT (decl))) | |
5273 | readonly = true; | |
5274 | } | |
5275 | else if (TREE_CODE (decl) == STRING_CST) | |
5276 | readonly = !flag_writable_strings; | |
5277 | else if (! (flag_pic && reloc)) | |
5278 | readonly = true; | |
5279 | ||
5280 | if (readonly) | |
5281 | readonly_data_section (); | |
5282 | else | |
5283 | data_section (); | |
5284 | } | |
5285 | ||
5286 | /* A helper function for default_elf_select_section and | |
5287 | default_elf_unique_section. Categorizes the DECL. */ | |
5288 | ||
5289 | enum section_category | |
5290 | { | |
5291 | SECCAT_TEXT, | |
5292 | ||
5293 | SECCAT_RODATA, | |
5294 | SECCAT_RODATA_MERGE_STR, | |
5295 | SECCAT_RODATA_MERGE_STR_INIT, | |
5296 | SECCAT_RODATA_MERGE_CONST, | |
5297 | ||
5298 | SECCAT_DATA, | |
5299 | ||
5300 | /* To optimize loading of shared programs, define following subsections | |
5301 | of data section: | |
5302 | _REL Contains data that has relocations, so they get grouped | |
5303 | together and dynamic linker will visit fewer pages in memory. | |
5304 | _RO Contains data that is otherwise read-only. This is useful | |
5305 | with prelinking as most relocations won't be dynamically | |
5306 | linked and thus stay read only. | |
5307 | _LOCAL Marks data containing relocations only to local objects. | |
5308 | These relocations will get fully resolved by prelinking. */ | |
5309 | SECCAT_DATA_REL, | |
5310 | SECCAT_DATA_REL_LOCAL, | |
5311 | SECCAT_DATA_REL_RO, | |
5312 | SECCAT_DATA_REL_RO_LOCAL, | |
5313 | ||
5314 | SECCAT_SDATA, | |
5315 | SECCAT_TDATA, | |
5316 | ||
5317 | SECCAT_BSS, | |
5318 | SECCAT_SBSS, | |
5319 | SECCAT_TBSS | |
5320 | }; | |
5321 | ||
5322 | static enum section_category categorize_decl_for_section PARAMS ((tree, int)); | |
5323 | ||
5324 | static enum section_category | |
5325 | categorize_decl_for_section (decl, reloc) | |
5326 | tree decl; | |
5327 | int reloc; | |
5328 | { | |
5329 | enum section_category ret; | |
5330 | ||
5331 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
5332 | return SECCAT_TEXT; | |
5333 | else if (TREE_CODE (decl) == STRING_CST) | |
5334 | { | |
5335 | if (flag_writable_strings) | |
5336 | return SECCAT_DATA; | |
5337 | else | |
5338 | return SECCAT_RODATA_MERGE_STR; | |
5339 | } | |
5340 | else if (TREE_CODE (decl) == VAR_DECL) | |
5341 | { | |
5342 | if (DECL_INITIAL (decl) == NULL | |
5343 | || DECL_INITIAL (decl) == error_mark_node) | |
5344 | ret = SECCAT_BSS; | |
5345 | else if (! TREE_READONLY (decl) | |
5346 | || TREE_SIDE_EFFECTS (decl) | |
5347 | || ! TREE_CONSTANT (DECL_INITIAL (decl))) | |
5348 | { | |
5349 | if (flag_pic && (reloc & 2)) | |
5350 | ret = SECCAT_DATA_REL; | |
5351 | else if (flag_pic && reloc) | |
5352 | ret = SECCAT_DATA_REL_LOCAL; | |
5353 | else | |
5354 | ret = SECCAT_DATA; | |
5355 | } | |
5356 | else if (flag_pic && (reloc & 2)) | |
5357 | ret = SECCAT_DATA_REL_RO; | |
5358 | else if (flag_pic && reloc) | |
5359 | ret = SECCAT_DATA_REL_RO_LOCAL; | |
5360 | else if (flag_merge_constants < 2) | |
5361 | /* C and C++ don't allow different variables to share the same | |
5362 | location. -fmerge-all-constants allows even that (at the | |
5363 | expense of not conforming). */ | |
5364 | ret = SECCAT_RODATA; | |
5365 | else if (TREE_CODE (DECL_INITIAL (decl)) == STRING_CST) | |
5366 | ret = SECCAT_RODATA_MERGE_STR_INIT; | |
5367 | else | |
5368 | ret = SECCAT_RODATA_MERGE_CONST; | |
5369 | } | |
5370 | else if (TREE_CODE (decl) == CONSTRUCTOR) | |
5371 | { | |
5372 | if ((flag_pic && reloc) | |
5373 | || TREE_SIDE_EFFECTS (decl) | |
5374 | || ! TREE_CONSTANT (decl)) | |
5375 | ret = SECCAT_DATA; | |
5376 | else | |
5377 | ret = SECCAT_RODATA; | |
5378 | } | |
5379 | else | |
5380 | ret = SECCAT_RODATA; | |
5381 | ||
3d78f2e9 RH |
5382 | /* There are no read-only thread-local sections. */ |
5383 | if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL (decl)) | |
5384 | { | |
5385 | if (ret == SECCAT_BSS) | |
5386 | ret = SECCAT_TBSS; | |
5387 | else | |
5388 | ret = SECCAT_TDATA; | |
5389 | } | |
5390 | ||
ae46c4e0 | 5391 | /* If the target uses small data sections, select it. */ |
3d78f2e9 | 5392 | else if ((*targetm.in_small_data_p) (decl)) |
ae46c4e0 RH |
5393 | { |
5394 | if (ret == SECCAT_BSS) | |
5395 | ret = SECCAT_SBSS; | |
5396 | else | |
5397 | ret = SECCAT_SDATA; | |
5398 | } | |
5399 | ||
5400 | return ret; | |
5401 | } | |
5402 | ||
5403 | /* Select a section based on the above categorization. */ | |
5404 | ||
5405 | void | |
5406 | default_elf_select_section (decl, reloc, align) | |
5407 | tree decl; | |
5408 | int reloc; | |
5409 | unsigned HOST_WIDE_INT align; | |
5410 | { | |
5411 | switch (categorize_decl_for_section (decl, reloc)) | |
5412 | { | |
5413 | case SECCAT_TEXT: | |
5414 | /* We're not supposed to be called on FUNCTION_DECLs. */ | |
5415 | abort (); | |
5416 | case SECCAT_RODATA: | |
5417 | readonly_data_section (); | |
5418 | break; | |
5419 | case SECCAT_RODATA_MERGE_STR: | |
5420 | mergeable_string_section (decl, align, 0); | |
5421 | break; | |
5422 | case SECCAT_RODATA_MERGE_STR_INIT: | |
5423 | mergeable_string_section (DECL_INITIAL (decl), align, 0); | |
5424 | break; | |
5425 | case SECCAT_RODATA_MERGE_CONST: | |
5426 | mergeable_constant_section (DECL_MODE (decl), align, 0); | |
5427 | break; | |
5428 | case SECCAT_DATA: | |
5429 | data_section (); | |
5430 | break; | |
5431 | case SECCAT_DATA_REL: | |
5432 | named_section (NULL_TREE, ".data.rel", reloc); | |
5433 | break; | |
5434 | case SECCAT_DATA_REL_LOCAL: | |
5435 | named_section (NULL_TREE, ".data.rel.local", reloc); | |
5436 | break; | |
5437 | case SECCAT_DATA_REL_RO: | |
5438 | named_section (NULL_TREE, ".data.rel.ro", reloc); | |
5439 | break; | |
5440 | case SECCAT_DATA_REL_RO_LOCAL: | |
5441 | named_section (NULL_TREE, ".data.rel.ro.local", reloc); | |
5442 | break; | |
5443 | case SECCAT_SDATA: | |
5444 | named_section (NULL_TREE, ".sdata", reloc); | |
5445 | break; | |
5446 | case SECCAT_TDATA: | |
5447 | named_section (NULL_TREE, ".tdata", reloc); | |
5448 | break; | |
5449 | case SECCAT_BSS: | |
5450 | #ifdef BSS_SECTION_ASM_OP | |
5451 | bss_section (); | |
5452 | #else | |
5453 | named_section (NULL_TREE, ".bss", reloc); | |
5454 | #endif | |
5455 | break; | |
5456 | case SECCAT_SBSS: | |
5457 | named_section (NULL_TREE, ".sbss", reloc); | |
5458 | break; | |
5459 | case SECCAT_TBSS: | |
5460 | named_section (NULL_TREE, ".tbss", reloc); | |
5461 | break; | |
5462 | default: | |
5463 | abort (); | |
5464 | } | |
5465 | } | |
5466 | ||
5467 | /* Construct a unique section name based on the decl name and the | |
5468 | categorization performed above. */ | |
5469 | ||
5470 | void | |
5471 | default_unique_section (decl, reloc) | |
5472 | tree decl; | |
5473 | int reloc; | |
5474 | { | |
5475 | bool one_only = DECL_ONE_ONLY (decl); | |
5476 | const char *prefix, *name; | |
5477 | size_t nlen, plen; | |
5478 | char *string; | |
5479 | ||
5480 | switch (categorize_decl_for_section (decl, reloc)) | |
5481 | { | |
5482 | case SECCAT_TEXT: | |
5483 | prefix = one_only ? ".gnu.linkonce.t." : ".text."; | |
5484 | break; | |
5485 | case SECCAT_RODATA: | |
5486 | case SECCAT_RODATA_MERGE_STR: | |
5487 | case SECCAT_RODATA_MERGE_STR_INIT: | |
5488 | case SECCAT_RODATA_MERGE_CONST: | |
5489 | prefix = one_only ? ".gnu.linkonce.r." : ".rodata."; | |
5490 | break; | |
5491 | case SECCAT_DATA: | |
5492 | case SECCAT_DATA_REL: | |
5493 | case SECCAT_DATA_REL_LOCAL: | |
5494 | case SECCAT_DATA_REL_RO: | |
5495 | case SECCAT_DATA_REL_RO_LOCAL: | |
5496 | prefix = one_only ? ".gnu.linkonce.d." : ".data."; | |
5497 | break; | |
5498 | case SECCAT_SDATA: | |
5499 | prefix = one_only ? ".gnu.linkonce.s." : ".sdata."; | |
5500 | break; | |
5501 | case SECCAT_BSS: | |
5502 | prefix = one_only ? ".gnu.linkonce.b." : ".bss."; | |
5503 | break; | |
5504 | case SECCAT_SBSS: | |
5505 | prefix = one_only ? ".gnu.linkonce.sb." : ".sbss."; | |
5506 | break; | |
5507 | case SECCAT_TDATA: | |
c711ba8e RH |
5508 | prefix = one_only ? ".gnu.linkonce.td." : ".tdata."; |
5509 | break; | |
ae46c4e0 | 5510 | case SECCAT_TBSS: |
c711ba8e RH |
5511 | prefix = one_only ? ".gnu.linkonce.tb." : ".tbss."; |
5512 | break; | |
ae46c4e0 RH |
5513 | default: |
5514 | abort (); | |
5515 | } | |
5516 | plen = strlen (prefix); | |
5517 | ||
5518 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
772c5265 | 5519 | name = (* targetm.strip_name_encoding) (name); |
ae46c4e0 RH |
5520 | nlen = strlen (name); |
5521 | ||
5522 | string = alloca (nlen + plen + 1); | |
5523 | memcpy (string, prefix, plen); | |
5524 | memcpy (string + plen, name, nlen + 1); | |
5525 | ||
5526 | DECL_SECTION_NAME (decl) = build_string (nlen + plen, string); | |
5527 | } | |
b64a1b53 RH |
5528 | |
5529 | void | |
5530 | default_select_rtx_section (mode, x, align) | |
5531 | enum machine_mode mode ATTRIBUTE_UNUSED; | |
5532 | rtx x; | |
5533 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED; | |
5534 | { | |
5535 | if (flag_pic) | |
5536 | switch (GET_CODE (x)) | |
5537 | { | |
5538 | case CONST: | |
5539 | case SYMBOL_REF: | |
5540 | case LABEL_REF: | |
5541 | data_section (); | |
5542 | return; | |
5543 | ||
5544 | default: | |
5545 | break; | |
5546 | } | |
5547 | ||
5548 | readonly_data_section (); | |
5549 | } | |
5550 | ||
5551 | void | |
5552 | default_elf_select_rtx_section (mode, x, align) | |
5553 | enum machine_mode mode; | |
5554 | rtx x; | |
5555 | unsigned HOST_WIDE_INT align; | |
5556 | { | |
5557 | /* ??? Handle small data here somehow. */ | |
5558 | ||
5559 | if (flag_pic) | |
5560 | switch (GET_CODE (x)) | |
5561 | { | |
5562 | case CONST: | |
5563 | case SYMBOL_REF: | |
5564 | named_section (NULL_TREE, ".data.rel.ro", 3); | |
5565 | return; | |
5566 | ||
5567 | case LABEL_REF: | |
5568 | named_section (NULL_TREE, ".data.rel.ro.local", 1); | |
5569 | return; | |
5570 | ||
5571 | default: | |
5572 | break; | |
5573 | } | |
5574 | ||
5575 | mergeable_constant_section (mode, align, 0); | |
5576 | } | |
772c5265 RH |
5577 | |
5578 | /* By default, we do nothing for encode_section_info, so we need not | |
5579 | do anything but discard the '*' marker. */ | |
5580 | ||
5581 | const char * | |
5582 | default_strip_name_encoding (str) | |
5583 | const char *str; | |
5584 | { | |
5585 | return str + (*str == '*'); | |
5586 | } | |
47754fd5 RH |
5587 | |
5588 | /* Assume ELF-ish defaults, since that's pretty much the most liberal | |
5589 | wrt cross-module name binding. */ | |
5590 | ||
5591 | bool | |
5592 | default_binds_local_p (exp) | |
5593 | tree exp; | |
5594 | { | |
5595 | bool local_p; | |
5596 | ||
5597 | /* A non-decl is an entry in the constant pool. */ | |
5598 | if (!DECL_P (exp)) | |
5599 | local_p = true; | |
5600 | /* A variable is considered "local" if it is defined by this module. */ | |
121f5c2c | 5601 | else if (MODULE_LOCAL_P (exp)) |
47754fd5 RH |
5602 | local_p = true; |
5603 | /* Otherwise, variables defined outside this object may not be local. */ | |
5604 | else if (DECL_EXTERNAL (exp)) | |
5605 | local_p = false; | |
5606 | /* Linkonce and weak data are never local. */ | |
5607 | else if (DECL_ONE_ONLY (exp) || DECL_WEAK (exp)) | |
5608 | local_p = false; | |
5609 | /* Static variables are always local. */ | |
5610 | else if (! TREE_PUBLIC (exp)) | |
5611 | local_p = true; | |
5612 | /* If PIC, then assume that any global name can be overridden by | |
5613 | symbols resolved from other modules. */ | |
5614 | else if (flag_pic) | |
5615 | local_p = false; | |
5616 | /* Uninitialized COMMON variable may be unified with symbols | |
5617 | resolved from other modules. */ | |
5618 | else if (DECL_COMMON (exp) | |
5619 | && (DECL_INITIAL (exp) == NULL | |
5620 | || DECL_INITIAL (exp) == error_mark_node)) | |
5621 | local_p = false; | |
5622 | /* Otherwise we're left with initialized (or non-common) global data | |
5623 | which is of necessity defined locally. */ | |
5624 | else | |
5625 | local_p = true; | |
5626 | ||
5627 | return local_p; | |
5628 | } |