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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, |
06e4eab5 | 3 | 1998, 1999, 2000, 2001, 2002, 2003, 2004 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" |
4977bab6 ZW |
32 | #include "coretypes.h" |
33 | #include "tm.h" | |
79e68feb RS |
34 | #include "rtl.h" |
35 | #include "tree.h" | |
36 | #include "flags.h" | |
57632c51 | 37 | #include "function.h" |
79e68feb RS |
38 | #include "expr.h" |
39 | #include "hard-reg-set.h" | |
40 | #include "regs.h" | |
24b09b50 | 41 | #include "real.h" |
c7836bcd | 42 | #include "output.h" |
10f0ad3d | 43 | #include "toplev.h" |
bd7cf17e | 44 | #include "hashtab.h" |
3d6f7931 | 45 | #include "c-pragma.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" |
6de9cd9a | 51 | #include "tree-mudflap.h" |
1668aabc | 52 | #include "cgraph.h" |
750054a2 | 53 | #include "cfglayout.h" |
79e68feb | 54 | |
440aabf8 NB |
55 | #ifdef XCOFF_DEBUGGING_INFO |
56 | #include "xcoffout.h" /* Needed for external data | |
57 | declarations for e.g. AIX 4.x. */ | |
58 | #endif | |
59 | ||
79e68feb | 60 | #ifndef ASM_STABS_OP |
0a3e1f45 | 61 | #define ASM_STABS_OP "\t.stabs\t" |
79e68feb RS |
62 | #endif |
63 | ||
79e68feb | 64 | /* The (assembler) name of the first globally-visible object output. */ |
3b304f5b ZW |
65 | const char *first_global_object_name; |
66 | const char *weak_global_object_name; | |
79e68feb | 67 | |
36edd3cc | 68 | struct addr_const; |
e2500fed | 69 | struct constant_descriptor_rtx; |
3234b52d | 70 | struct rtx_constant_pool; |
36edd3cc | 71 | |
e2500fed | 72 | struct varasm_status GTY(()) |
36edd3cc | 73 | { |
3234b52d RH |
74 | /* If we're using a per-function constant pool, this is it. */ |
75 | struct rtx_constant_pool *pool; | |
10b6a274 ZW |
76 | |
77 | /* Number of tree-constants deferred during the expansion of this | |
78 | function. */ | |
79 | unsigned int deferred_constants; | |
36edd3cc BS |
80 | }; |
81 | ||
10b6a274 | 82 | #define n_deferred_constants (cfun->varasm->deferred_constants) |
36edd3cc | 83 | |
79e68feb RS |
84 | /* Number for making the label on the next |
85 | constant that is stored in memory. */ | |
86 | ||
17211ab5 | 87 | static GTY(()) int const_labelno; |
79e68feb | 88 | |
dcc8e5e6 RS |
89 | /* Carry information from ASM_DECLARE_OBJECT_NAME |
90 | to ASM_FINISH_DECLARE_OBJECT. */ | |
91 | ||
92 | int size_directive_output; | |
93 | ||
cbed4565 RS |
94 | /* The last decl for which assemble_variable was called, |
95 | if it did ASM_DECLARE_OBJECT_NAME. | |
96 | If the last call to assemble_variable didn't do that, | |
97 | this holds 0. */ | |
98 | ||
99 | tree last_assemble_variable_decl; | |
100 | ||
750054a2 CT |
101 | /* The following global variable indicates if the section label for the |
102 | "cold" section of code has been output yet to the assembler. The | |
103 | label is useful when running gdb. This is part of the optimization that | |
104 | partitions hot and cold basic blocks into separate sections of the .o | |
105 | file. */ | |
106 | ||
107 | bool unlikely_section_label_printed = false; | |
108 | ||
a79e3a45 RK |
109 | /* RTX_UNCHANGING_P in a MEM can mean it is stored into, for initialization. |
110 | So giving constant the alias set for the type will allow such | |
111 | initializations to appear to conflict with the load of the constant. We | |
112 | avoid this by giving all constants an alias set for just constants. | |
a8154559 | 113 | Since there will be no stores to that alias set, nothing will ever |
a79e3a45 RK |
114 | conflict with them. */ |
115 | ||
116 | static HOST_WIDE_INT const_alias_set; | |
117 | ||
2e1eedd6 AJ |
118 | static const char *strip_reg_name (const char *); |
119 | static int contains_pointers_p (tree); | |
9be6533a RS |
120 | #ifdef ASM_OUTPUT_EXTERNAL |
121 | static bool incorporeal_function_p (tree); | |
122 | #endif | |
2e1eedd6 AJ |
123 | static void decode_addr_const (tree, struct addr_const *); |
124 | static hashval_t const_desc_hash (const void *); | |
125 | static int const_desc_eq (const void *, const void *); | |
126 | static hashval_t const_hash_1 (const tree); | |
127 | static int compare_constant (const tree, const tree); | |
128 | static tree copy_constant (tree); | |
129 | static void output_constant_def_contents (rtx); | |
b2218cc1 | 130 | static void output_addressed_constants (tree); |
2e1eedd6 AJ |
131 | static unsigned HOST_WIDE_INT array_size_for_constructor (tree); |
132 | static unsigned min_align (unsigned, unsigned); | |
133 | static void output_constructor (tree, unsigned HOST_WIDE_INT, unsigned int); | |
134 | static void globalize_decl (tree); | |
135 | static void maybe_assemble_visibility (tree); | |
136 | static int in_named_entry_eq (const void *, const void *); | |
137 | static hashval_t in_named_entry_hash (const void *); | |
78a47b1d | 138 | #ifdef BSS_SECTION_ASM_OP |
0e05e8ea | 139 | #ifdef ASM_OUTPUT_BSS |
2e1eedd6 AJ |
140 | static void asm_output_bss (FILE *, tree, const char *, |
141 | unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT); | |
0e05e8ea JL |
142 | #endif |
143 | #ifdef ASM_OUTPUT_ALIGNED_BSS | |
2e1eedd6 AJ |
144 | static void asm_output_aligned_bss (FILE *, tree, const char *, |
145 | unsigned HOST_WIDE_INT, int) | |
146 | ATTRIBUTE_UNUSED; | |
0e05e8ea | 147 | #endif |
cab634f2 | 148 | #endif /* BSS_SECTION_ASM_OP */ |
2e1eedd6 AJ |
149 | static bool asm_emit_uninitialised (tree, const char*, |
150 | unsigned HOST_WIDE_INT, | |
151 | unsigned HOST_WIDE_INT); | |
152 | static void mark_weak (tree); | |
79e68feb | 153 | \f |
750054a2 CT |
154 | enum in_section { no_section, in_text, in_unlikely_executed_text, in_data, |
155 | in_named | |
e5887033 DE |
156 | #ifdef BSS_SECTION_ASM_OP |
157 | , in_bss | |
158 | #endif | |
2cc07db4 RH |
159 | #ifdef CTORS_SECTION_ASM_OP |
160 | , in_ctors | |
161 | #endif | |
162 | #ifdef DTORS_SECTION_ASM_OP | |
163 | , in_dtors | |
164 | #endif | |
d48bc59a RH |
165 | #ifdef READONLY_DATA_SECTION_ASM_OP |
166 | , in_readonly_data | |
167 | #endif | |
79e68feb | 168 | #ifdef EXTRA_SECTIONS |
e5887033 | 169 | , EXTRA_SECTIONS |
79e68feb | 170 | #endif |
17211ab5 GK |
171 | }; |
172 | static GTY(()) enum in_section in_section = no_section; | |
79e68feb | 173 | |
0e9e1e0a | 174 | /* Return a nonzero value if DECL has a section attribute. */ |
a56e7c08 | 175 | #ifndef IN_NAMED_SECTION |
8a425a05 DE |
176 | #define IN_NAMED_SECTION(DECL) \ |
177 | ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \ | |
178 | && DECL_SECTION_NAME (DECL) != NULL_TREE) | |
a56e7c08 | 179 | #endif |
46f9491e | 180 | |
8a425a05 | 181 | /* Text of section name when in_section == in_named. */ |
17211ab5 | 182 | static GTY(()) const char *in_named_name; |
8a425a05 | 183 | |
715bdd29 RH |
184 | /* Hash table of flags that have been used for a particular named section. */ |
185 | ||
17211ab5 | 186 | struct in_named_entry GTY(()) |
715bdd29 RH |
187 | { |
188 | const char *name; | |
189 | unsigned int flags; | |
a8c01a59 | 190 | bool declared; |
715bdd29 RH |
191 | }; |
192 | ||
17211ab5 | 193 | static GTY((param_is (struct in_named_entry))) htab_t in_named_htab; |
715bdd29 | 194 | |
79e68feb RS |
195 | /* Define functions like text_section for any extra sections. */ |
196 | #ifdef EXTRA_SECTION_FUNCTIONS | |
197 | EXTRA_SECTION_FUNCTIONS | |
198 | #endif | |
199 | ||
200 | /* Tell assembler to switch to text section. */ | |
201 | ||
202 | void | |
2e1eedd6 | 203 | text_section (void) |
79e68feb RS |
204 | { |
205 | if (in_section != in_text) | |
206 | { | |
d48bc59a | 207 | in_section = in_text; |
34982294 AP |
208 | fprintf (asm_out_file, "%s\n", TEXT_SECTION_ASM_OP); |
209 | ASM_OUTPUT_ALIGN (asm_out_file, 2); | |
750054a2 CT |
210 | } |
211 | } | |
212 | ||
213 | /* Tell assembler to switch to unlikely-to-be-executed text section. */ | |
214 | ||
215 | void | |
216 | unlikely_text_section (void) | |
217 | { | |
218 | if ((in_section != in_unlikely_executed_text) | |
219 | && (in_section != in_named | |
220 | || strcmp (in_named_name, UNLIKELY_EXECUTED_TEXT_SECTION_NAME) != 0)) | |
221 | { | |
34982294 AP |
222 | if (targetm.have_named_sections) |
223 | named_section (NULL_TREE, UNLIKELY_EXECUTED_TEXT_SECTION_NAME, 0); | |
224 | else | |
225 | { | |
226 | in_section = in_unlikely_executed_text; | |
227 | fprintf (asm_out_file, "%s\n", TEXT_SECTION_ASM_OP); | |
34982294 | 228 | } |
750054a2 | 229 | |
750054a2 CT |
230 | if (!unlikely_section_label_printed) |
231 | { | |
232 | fprintf (asm_out_file, "__%s_unlikely_section:\n", | |
233 | current_function_name ()); | |
234 | unlikely_section_label_printed = true; | |
73ad3de5 | 235 | |
1ae58c30 | 236 | /* Make sure that we have appropriate alignment for instructions |
73ad3de5 RH |
237 | in this section. */ |
238 | assemble_align (FUNCTION_BOUNDARY); | |
750054a2 | 239 | } |
79e68feb RS |
240 | } |
241 | } | |
242 | ||
79e68feb RS |
243 | /* Tell assembler to switch to data section. */ |
244 | ||
245 | void | |
2e1eedd6 | 246 | data_section (void) |
79e68feb RS |
247 | { |
248 | if (in_section != in_data) | |
249 | { | |
d48bc59a | 250 | in_section = in_data; |
dc79b3b8 | 251 | fprintf (asm_out_file, "%s\n", DATA_SECTION_ASM_OP); |
79e68feb RS |
252 | } |
253 | } | |
c26fbbca | 254 | |
7c6d68c8 RS |
255 | /* Tell assembler to switch to read-only data section. This is normally |
256 | the text section. */ | |
257 | ||
258 | void | |
2e1eedd6 | 259 | readonly_data_section (void) |
7c6d68c8 RS |
260 | { |
261 | #ifdef READONLY_DATA_SECTION | |
262 | READONLY_DATA_SECTION (); /* Note this can call data_section. */ | |
d48bc59a RH |
263 | #else |
264 | #ifdef READONLY_DATA_SECTION_ASM_OP | |
265 | if (in_section != in_readonly_data) | |
266 | { | |
267 | in_section = in_readonly_data; | |
268 | fputs (READONLY_DATA_SECTION_ASM_OP, asm_out_file); | |
269 | fputc ('\n', asm_out_file); | |
270 | } | |
7c6d68c8 RS |
271 | #else |
272 | text_section (); | |
273 | #endif | |
d48bc59a | 274 | #endif |
7c6d68c8 RS |
275 | } |
276 | ||
0f41302f | 277 | /* Determine if we're in the text section. */ |
79e68feb RS |
278 | |
279 | int | |
2e1eedd6 | 280 | in_text_section (void) |
79e68feb RS |
281 | { |
282 | return in_section == in_text; | |
283 | } | |
8a425a05 | 284 | |
750054a2 CT |
285 | /* Determine if we're in the unlikely-to-be-executed text section. */ |
286 | ||
287 | int | |
288 | in_unlikely_text_section (void) | |
289 | { | |
290 | return in_section == in_unlikely_executed_text; | |
291 | } | |
292 | ||
0f41302f | 293 | /* Determine if we're in the data section. */ |
6f2f3db7 | 294 | |
274351ba | 295 | int |
2e1eedd6 | 296 | in_data_section (void) |
274351ba RK |
297 | { |
298 | return in_section == in_data; | |
299 | } | |
6f2f3db7 | 300 | |
715bdd29 RH |
301 | /* Helper routines for maintaining in_named_htab. */ |
302 | ||
303 | static int | |
2e1eedd6 | 304 | in_named_entry_eq (const void *p1, const void *p2) |
715bdd29 RH |
305 | { |
306 | const struct in_named_entry *old = p1; | |
307 | const char *new = p2; | |
308 | ||
309 | return strcmp (old->name, new) == 0; | |
310 | } | |
311 | ||
312 | static hashval_t | |
2e1eedd6 | 313 | in_named_entry_hash (const void *p) |
715bdd29 RH |
314 | { |
315 | const struct in_named_entry *old = p; | |
316 | return htab_hash_string (old->name); | |
317 | } | |
318 | ||
319 | /* If SECTION has been seen before as a named section, return the flags | |
320 | that were used. Otherwise, return 0. Note, that 0 is a perfectly valid | |
321 | set of flags for a section to have, so 0 does not mean that the section | |
322 | has not been seen. */ | |
323 | ||
324 | unsigned int | |
2e1eedd6 | 325 | get_named_section_flags (const char *section) |
715bdd29 RH |
326 | { |
327 | struct in_named_entry **slot; | |
328 | ||
c26fbbca | 329 | slot = (struct in_named_entry **) |
715bdd29 RH |
330 | htab_find_slot_with_hash (in_named_htab, section, |
331 | htab_hash_string (section), NO_INSERT); | |
332 | ||
333 | return slot ? (*slot)->flags : 0; | |
334 | } | |
335 | ||
a8c01a59 | 336 | /* Returns true if the section has been declared before. Sets internal |
c26fbbca | 337 | flag on this section in in_named_hash so subsequent calls on this |
2ba84f36 | 338 | section will return false. */ |
a8c01a59 RL |
339 | |
340 | bool | |
2e1eedd6 | 341 | named_section_first_declaration (const char *name) |
a8c01a59 RL |
342 | { |
343 | struct in_named_entry **slot; | |
344 | ||
c26fbbca KH |
345 | slot = (struct in_named_entry **) |
346 | htab_find_slot_with_hash (in_named_htab, name, | |
a8c01a59 RL |
347 | htab_hash_string (name), NO_INSERT); |
348 | if (! (*slot)->declared) | |
349 | { | |
350 | (*slot)->declared = true; | |
351 | return true; | |
352 | } | |
c26fbbca | 353 | else |
a8c01a59 RL |
354 | { |
355 | return false; | |
356 | } | |
357 | } | |
358 | ||
359 | ||
715bdd29 RH |
360 | /* Record FLAGS for SECTION. If SECTION was previously recorded with a |
361 | different set of flags, return false. */ | |
362 | ||
363 | bool | |
2e1eedd6 | 364 | set_named_section_flags (const char *section, unsigned int flags) |
715bdd29 RH |
365 | { |
366 | struct in_named_entry **slot, *entry; | |
367 | ||
c26fbbca | 368 | slot = (struct in_named_entry **) |
715bdd29 RH |
369 | htab_find_slot_with_hash (in_named_htab, section, |
370 | htab_hash_string (section), INSERT); | |
371 | entry = *slot; | |
372 | ||
373 | if (!entry) | |
374 | { | |
703ad42b | 375 | entry = ggc_alloc (sizeof (*entry)); |
715bdd29 RH |
376 | *slot = entry; |
377 | entry->name = ggc_strdup (section); | |
378 | entry->flags = flags; | |
8d2134aa | 379 | entry->declared = false; |
715bdd29 RH |
380 | } |
381 | else if (entry->flags != flags) | |
382 | return false; | |
383 | ||
384 | return true; | |
385 | } | |
386 | ||
7c262518 RH |
387 | /* Tell assembler to change to section NAME with attributes FLAGS. */ |
388 | ||
389 | void | |
2e1eedd6 | 390 | named_section_flags (const char *name, unsigned int flags) |
7c262518 | 391 | { |
715bdd29 | 392 | if (in_section != in_named || strcmp (name, in_named_name) != 0) |
7c262518 | 393 | { |
715bdd29 RH |
394 | if (! set_named_section_flags (name, flags)) |
395 | abort (); | |
396 | ||
5fd9b178 | 397 | targetm.asm_out.named_section (name, flags); |
7c262518 RH |
398 | |
399 | if (flags & SECTION_FORGET) | |
400 | in_section = no_section; | |
401 | else | |
402 | { | |
403 | in_named_name = ggc_strdup (name); | |
404 | in_section = in_named; | |
405 | } | |
406 | } | |
407 | } | |
408 | ||
2ffe831c DE |
409 | /* Tell assembler to change to section NAME for DECL. |
410 | If DECL is NULL, just switch to section NAME. | |
ad4ff310 JM |
411 | If NAME is NULL, get the name from DECL. |
412 | If RELOC is 1, the initializer for DECL contains relocs. */ | |
8a425a05 DE |
413 | |
414 | void | |
2e1eedd6 | 415 | named_section (tree decl, const char *name, int reloc) |
8a425a05 | 416 | { |
7c262518 RH |
417 | unsigned int flags; |
418 | ||
2f939d94 | 419 | if (decl != NULL_TREE && !DECL_P (decl)) |
2ffe831c DE |
420 | abort (); |
421 | if (name == NULL) | |
422 | name = TREE_STRING_POINTER (DECL_SECTION_NAME (decl)); | |
423 | ||
245f1bfa | 424 | flags = targetm.section_type_flags (decl, name, reloc); |
715bdd29 RH |
425 | |
426 | /* Sanity check user variables for flag changes. Non-user | |
10c45943 AG |
427 | section flag changes will abort in named_section_flags. |
428 | However, don't complain if SECTION_OVERRIDE is set. | |
429 | We trust that the setter knows that it is safe to ignore | |
430 | the default flags for this decl. */ | |
715bdd29 RH |
431 | if (decl && ! set_named_section_flags (name, flags)) |
432 | { | |
715bdd29 | 433 | flags = get_named_section_flags (name); |
10c45943 | 434 | if ((flags & SECTION_OVERRIDE) == 0) |
ddd2d57e | 435 | error ("%J%D causes a section type conflict", decl, decl); |
715bdd29 RH |
436 | } |
437 | ||
438 | named_section_flags (name, flags); | |
7c262518 | 439 | } |
e9a25f70 | 440 | |
7c262518 RH |
441 | /* If required, set DECL_SECTION_NAME to a unique name. */ |
442 | ||
89ce1c8f | 443 | void |
2e1eedd6 AJ |
444 | resolve_unique_section (tree decl, int reloc ATTRIBUTE_UNUSED, |
445 | int flag_function_or_data_sections) | |
7c262518 RH |
446 | { |
447 | if (DECL_SECTION_NAME (decl) == NULL_TREE | |
ae46c4e0 | 448 | && targetm.have_named_sections |
1b18fc2c | 449 | && (flag_function_or_data_sections |
ae46c4e0 | 450 | || DECL_ONE_ONLY (decl))) |
5fd9b178 | 451 | targetm.asm_out.unique_section (decl, reloc); |
8a425a05 | 452 | } |
4d1065ed | 453 | |
e5887033 DE |
454 | #ifdef BSS_SECTION_ASM_OP |
455 | ||
456 | /* Tell the assembler to switch to the bss section. */ | |
457 | ||
458 | void | |
2e1eedd6 | 459 | bss_section (void) |
e5887033 DE |
460 | { |
461 | if (in_section != in_bss) | |
462 | { | |
abf843c4 | 463 | fprintf (asm_out_file, "%s\n", BSS_SECTION_ASM_OP); |
e5887033 DE |
464 | in_section = in_bss; |
465 | } | |
466 | } | |
467 | ||
468 | #ifdef ASM_OUTPUT_BSS | |
469 | ||
470 | /* Utility function for ASM_OUTPUT_BSS for targets to use if | |
471 | they don't support alignments in .bss. | |
472 | ??? It is believed that this function will work in most cases so such | |
473 | support is localized here. */ | |
474 | ||
475 | static void | |
2e1eedd6 AJ |
476 | asm_output_bss (FILE *file, tree decl ATTRIBUTE_UNUSED, |
477 | const char *name, | |
478 | unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED, | |
479 | unsigned HOST_WIDE_INT rounded) | |
e5887033 | 480 | { |
5fd9b178 | 481 | targetm.asm_out.globalize_label (file, name); |
e5887033 | 482 | bss_section (); |
91fddd7c DE |
483 | #ifdef ASM_DECLARE_OBJECT_NAME |
484 | last_assemble_variable_decl = decl; | |
485 | ASM_DECLARE_OBJECT_NAME (file, name, decl); | |
486 | #else | |
487 | /* Standard thing is just output label for the object. */ | |
e5887033 | 488 | ASM_OUTPUT_LABEL (file, name); |
91fddd7c | 489 | #endif /* ASM_DECLARE_OBJECT_NAME */ |
95bfe95f | 490 | ASM_OUTPUT_SKIP (file, rounded ? rounded : 1); |
e5887033 DE |
491 | } |
492 | ||
493 | #endif | |
494 | ||
495 | #ifdef ASM_OUTPUT_ALIGNED_BSS | |
496 | ||
497 | /* Utility function for targets to use in implementing | |
498 | ASM_OUTPUT_ALIGNED_BSS. | |
499 | ??? It is believed that this function will work in most cases so such | |
500 | support is localized here. */ | |
501 | ||
502 | static void | |
2e1eedd6 AJ |
503 | asm_output_aligned_bss (FILE *file, tree decl ATTRIBUTE_UNUSED, |
504 | const char *name, unsigned HOST_WIDE_INT size, | |
505 | int align) | |
e5887033 | 506 | { |
e5887033 DE |
507 | bss_section (); |
508 | ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT)); | |
91fddd7c DE |
509 | #ifdef ASM_DECLARE_OBJECT_NAME |
510 | last_assemble_variable_decl = decl; | |
511 | ASM_DECLARE_OBJECT_NAME (file, name, decl); | |
512 | #else | |
513 | /* Standard thing is just output label for the object. */ | |
e5887033 | 514 | ASM_OUTPUT_LABEL (file, name); |
91fddd7c | 515 | #endif /* ASM_DECLARE_OBJECT_NAME */ |
f8bc3367 | 516 | ASM_OUTPUT_SKIP (file, size ? size : 1); |
e5887033 DE |
517 | } |
518 | ||
519 | #endif | |
520 | ||
521 | #endif /* BSS_SECTION_ASM_OP */ | |
522 | ||
4d1065ed DE |
523 | /* Switch to the section for function DECL. |
524 | ||
525 | If DECL is NULL_TREE, switch to the text section. | |
526 | ??? It's not clear that we will ever be passed NULL_TREE, but it's | |
527 | safer to handle it. */ | |
528 | ||
529 | void | |
2e1eedd6 | 530 | function_section (tree decl) |
4d1065ed | 531 | { |
750054a2 CT |
532 | if (scan_ahead_for_unlikely_executed_note (get_insns())) |
533 | unlikely_text_section (); | |
8b43265c | 534 | else |
750054a2 CT |
535 | { |
536 | if (decl != NULL_TREE | |
537 | && DECL_SECTION_NAME (decl) != NULL_TREE) | |
538 | named_section (decl, (char *) 0, 0); | |
539 | else | |
540 | text_section (); | |
541 | } | |
4d1065ed | 542 | } |
f9da1f35 | 543 | |
ae46c4e0 RH |
544 | /* Switch to section for variable DECL. RELOC is the same as the |
545 | argument to SELECT_SECTION. */ | |
f9da1f35 DE |
546 | |
547 | void | |
2e1eedd6 | 548 | variable_section (tree decl, int reloc) |
f9da1f35 DE |
549 | { |
550 | if (IN_NAMED_SECTION (decl)) | |
ad4ff310 | 551 | named_section (decl, NULL, reloc); |
f9da1f35 | 552 | else |
5fd9b178 | 553 | targetm.asm_out.select_section (decl, reloc, DECL_ALIGN (decl)); |
f9da1f35 | 554 | } |
6adb4e3a | 555 | |
201556f0 JJ |
556 | /* Tell assembler to switch to the section for string merging. */ |
557 | ||
558 | void | |
2e1eedd6 AJ |
559 | mergeable_string_section (tree decl ATTRIBUTE_UNUSED, |
560 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED, | |
561 | unsigned int flags ATTRIBUTE_UNUSED) | |
201556f0 | 562 | { |
5d4856a0 | 563 | if (HAVE_GAS_SHF_MERGE && flag_merge_constants |
201556f0 JJ |
564 | && TREE_CODE (decl) == STRING_CST |
565 | && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE | |
566 | && align <= 256 | |
567 | && TREE_STRING_LENGTH (decl) >= int_size_in_bytes (TREE_TYPE (decl))) | |
568 | { | |
569 | enum machine_mode mode; | |
570 | unsigned int modesize; | |
571 | const char *str; | |
572 | int i, j, len, unit; | |
573 | char name[30]; | |
574 | ||
575 | mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (decl))); | |
576 | modesize = GET_MODE_BITSIZE (mode); | |
577 | if (modesize >= 8 && modesize <= 256 | |
578 | && (modesize & (modesize - 1)) == 0) | |
579 | { | |
580 | if (align < modesize) | |
581 | align = modesize; | |
582 | ||
583 | str = TREE_STRING_POINTER (decl); | |
584 | len = TREE_STRING_LENGTH (decl); | |
585 | unit = GET_MODE_SIZE (mode); | |
586 | ||
587 | /* Check for embedded NUL characters. */ | |
588 | for (i = 0; i < len; i += unit) | |
589 | { | |
590 | for (j = 0; j < unit; j++) | |
c26fbbca | 591 | if (str[i + j] != '\0') |
201556f0 JJ |
592 | break; |
593 | if (j == unit) | |
594 | break; | |
595 | } | |
596 | if (i == len - unit) | |
597 | { | |
598 | sprintf (name, ".rodata.str%d.%d", modesize / 8, | |
599 | (int) (align / 8)); | |
600 | flags |= (modesize / 8) | SECTION_MERGE | SECTION_STRINGS; | |
601 | if (!i && modesize < align) | |
602 | { | |
603 | /* A "" string with requested alignment greater than | |
604 | character size might cause a problem: | |
605 | if some other string required even bigger | |
606 | alignment than "", then linker might think the | |
607 | "" is just part of padding after some other string | |
608 | and not put it into the hash table initially. | |
609 | But this means "" could have smaller alignment | |
610 | than requested. */ | |
611 | #ifdef ASM_OUTPUT_SECTION_START | |
612 | named_section_flags (name, flags); | |
613 | ASM_OUTPUT_SECTION_START (asm_out_file); | |
614 | #else | |
615 | readonly_data_section (); | |
616 | #endif | |
617 | return; | |
618 | } | |
619 | ||
620 | named_section_flags (name, flags); | |
621 | return; | |
622 | } | |
623 | } | |
624 | } | |
5d4856a0 | 625 | |
201556f0 | 626 | readonly_data_section (); |
c26fbbca | 627 | } |
201556f0 JJ |
628 | |
629 | /* Tell assembler to switch to the section for constant merging. */ | |
630 | ||
631 | void | |
2e1eedd6 AJ |
632 | mergeable_constant_section (enum machine_mode mode ATTRIBUTE_UNUSED, |
633 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED, | |
634 | unsigned int flags ATTRIBUTE_UNUSED) | |
201556f0 | 635 | { |
201556f0 JJ |
636 | unsigned int modesize = GET_MODE_BITSIZE (mode); |
637 | ||
5d4856a0 | 638 | if (HAVE_GAS_SHF_MERGE && flag_merge_constants |
201556f0 JJ |
639 | && mode != VOIDmode |
640 | && mode != BLKmode | |
641 | && modesize <= align | |
642 | && align >= 8 | |
643 | && align <= 256 | |
644 | && (align & (align - 1)) == 0) | |
645 | { | |
646 | char name[24]; | |
647 | ||
648 | sprintf (name, ".rodata.cst%d", (int) (align / 8)); | |
649 | flags |= (align / 8) | SECTION_MERGE; | |
650 | named_section_flags (name, flags); | |
651 | return; | |
c26fbbca | 652 | } |
5d4856a0 | 653 | |
201556f0 JJ |
654 | readonly_data_section (); |
655 | } | |
79e68feb | 656 | \f |
b4ac57ab RS |
657 | /* Given NAME, a putative register name, discard any customary prefixes. */ |
658 | ||
87e11268 | 659 | static const char * |
2e1eedd6 | 660 | strip_reg_name (const char *name) |
b4ac57ab RS |
661 | { |
662 | #ifdef REGISTER_PREFIX | |
663 | if (!strncmp (name, REGISTER_PREFIX, strlen (REGISTER_PREFIX))) | |
664 | name += strlen (REGISTER_PREFIX); | |
665 | #endif | |
666 | if (name[0] == '%' || name[0] == '#') | |
667 | name++; | |
668 | return name; | |
669 | } | |
dcfedcd0 | 670 | \f |
79e68feb RS |
671 | /* Decode an `asm' spec for a declaration as a register name. |
672 | Return the register number, or -1 if nothing specified, | |
c09e6498 RS |
673 | or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized, |
674 | or -3 if ASMSPEC is `cc' and is not recognized, | |
675 | or -4 if ASMSPEC is `memory' and is not recognized. | |
dcfedcd0 RK |
676 | Accept an exact spelling or a decimal number. |
677 | Prefixes such as % are optional. */ | |
79e68feb RS |
678 | |
679 | int | |
2e1eedd6 | 680 | decode_reg_name (const char *asmspec) |
79e68feb RS |
681 | { |
682 | if (asmspec != 0) | |
683 | { | |
684 | int i; | |
685 | ||
b4ac57ab RS |
686 | /* Get rid of confusing prefixes. */ |
687 | asmspec = strip_reg_name (asmspec); | |
46f9491e | 688 | |
fff9e713 MT |
689 | /* Allow a decimal number as a "register name". */ |
690 | for (i = strlen (asmspec) - 1; i >= 0; i--) | |
0df6c2c7 | 691 | if (! ISDIGIT (asmspec[i])) |
fff9e713 MT |
692 | break; |
693 | if (asmspec[0] != 0 && i < 0) | |
694 | { | |
695 | i = atoi (asmspec); | |
696 | if (i < FIRST_PSEUDO_REGISTER && i >= 0) | |
697 | return i; | |
698 | else | |
699 | return -2; | |
700 | } | |
701 | ||
79e68feb | 702 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) |
b4ac57ab RS |
703 | if (reg_names[i][0] |
704 | && ! strcmp (asmspec, strip_reg_name (reg_names[i]))) | |
79e68feb RS |
705 | return i; |
706 | ||
79e68feb RS |
707 | #ifdef ADDITIONAL_REGISTER_NAMES |
708 | { | |
83182544 | 709 | static const struct { const char *const name; const int number; } table[] |
79e68feb RS |
710 | = ADDITIONAL_REGISTER_NAMES; |
711 | ||
b6a1cbae | 712 | for (i = 0; i < (int) ARRAY_SIZE (table); i++) |
79e68feb RS |
713 | if (! strcmp (asmspec, table[i].name)) |
714 | return table[i].number; | |
79e68feb RS |
715 | } |
716 | #endif /* ADDITIONAL_REGISTER_NAMES */ | |
717 | ||
c09e6498 RS |
718 | if (!strcmp (asmspec, "memory")) |
719 | return -4; | |
720 | ||
dcfedcd0 RK |
721 | if (!strcmp (asmspec, "cc")) |
722 | return -3; | |
723 | ||
79e68feb RS |
724 | return -2; |
725 | } | |
726 | ||
727 | return -1; | |
728 | } | |
729 | \f | |
19e7881c MM |
730 | /* Create the DECL_RTL for a VAR_DECL or FUNCTION_DECL. DECL should |
731 | have static storage duration. In other words, it should not be an | |
732 | automatic variable, including PARM_DECLs. | |
733 | ||
734 | There is, however, one exception: this function handles variables | |
735 | explicitly placed in a particular register by the user. | |
736 | ||
737 | ASMSPEC, if not 0, is the string which the user specified as the | |
738 | assembler symbol name. | |
79e68feb RS |
739 | |
740 | This is never called for PARM_DECL nodes. */ | |
741 | ||
742 | void | |
2e1eedd6 | 743 | make_decl_rtl (tree decl, const char *asmspec) |
79e68feb | 744 | { |
63ad61ed | 745 | const char *name = 0; |
ca695ac9 | 746 | int reg_number; |
abde42f7 | 747 | rtx x; |
ca695ac9 | 748 | |
19e7881c | 749 | /* Check that we are not being given an automatic variable. */ |
9ea07fd0 | 750 | /* A weak alias has TREE_PUBLIC set but not the other bits. */ |
19e7881c MM |
751 | if (TREE_CODE (decl) == PARM_DECL |
752 | || TREE_CODE (decl) == RESULT_DECL | |
753 | || (TREE_CODE (decl) == VAR_DECL | |
754 | && !TREE_STATIC (decl) | |
9ea07fd0 | 755 | && !TREE_PUBLIC (decl) |
19e7881c MM |
756 | && !DECL_EXTERNAL (decl) |
757 | && !DECL_REGISTER (decl))) | |
758 | abort (); | |
759 | /* And that we were not given a type or a label. */ | |
46f9491e | 760 | else if (TREE_CODE (decl) == TYPE_DECL |
19e7881c MM |
761 | || TREE_CODE (decl) == LABEL_DECL) |
762 | abort (); | |
763 | ||
63ad61ed ZW |
764 | /* For a duplicate declaration, we can be called twice on the |
765 | same DECL node. Don't discard the RTL already made. */ | |
19e7881c | 766 | if (DECL_RTL_SET_P (decl)) |
79e68feb | 767 | { |
63ad61ed ZW |
768 | /* If the old RTL had the wrong mode, fix the mode. */ |
769 | if (GET_MODE (DECL_RTL (decl)) != DECL_MODE (decl)) | |
c4e59f51 RK |
770 | SET_DECL_RTL (decl, adjust_address_nv (DECL_RTL (decl), |
771 | DECL_MODE (decl), 0)); | |
76095e2f | 772 | |
b2e2d0cc EC |
773 | /* ??? Another way to do this would be to maintain a hashed |
774 | table of such critters. Instead of adding stuff to a DECL | |
775 | to give certain attributes to it, we could use an external | |
776 | hash map from DECL to set of attributes. */ | |
777 | ||
63ad61ed ZW |
778 | /* Let the target reassign the RTL if it wants. |
779 | This is necessary, for example, when one machine specific | |
780 | decl attribute overrides another. */ | |
245f1bfa | 781 | targetm.encode_section_info (decl, DECL_RTL (decl), false); |
6de9cd9a DN |
782 | |
783 | /* Make this function static known to the mudflap runtime. */ | |
784 | if (flag_mudflap && TREE_CODE (decl) == VAR_DECL) | |
785 | mudflap_enqueue_decl (decl); | |
786 | ||
63ad61ed | 787 | return; |
79e68feb RS |
788 | } |
789 | ||
63ad61ed ZW |
790 | reg_number = decode_reg_name (asmspec); |
791 | if (reg_number == -2) | |
8f820299 ZW |
792 | { |
793 | /* ASMSPEC is given, and not the name of a register. Mark the | |
794 | name with a star so assemble_name won't munge it. */ | |
795 | char *starred = alloca (strlen (asmspec) + 2); | |
796 | starred[0] = '*'; | |
797 | strcpy (starred + 1, asmspec); | |
fccc4eb2 | 798 | change_decl_assembler_name (decl, get_identifier (starred)); |
8f820299 | 799 | } |
63ad61ed | 800 | |
26e0dcb3 GK |
801 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); |
802 | ||
63ad61ed | 803 | if (TREE_CODE (decl) != FUNCTION_DECL && DECL_REGISTER (decl)) |
79e68feb | 804 | { |
79e68feb | 805 | /* First detect errors in declaring global registers. */ |
63ad61ed | 806 | if (reg_number == -1) |
ddd2d57e | 807 | error ("%Jregister name not specified for '%D'", decl, decl); |
63ad61ed | 808 | else if (reg_number < 0) |
ddd2d57e | 809 | error ("%Jinvalid register name for '%D'", decl, decl); |
63ad61ed | 810 | else if (TYPE_MODE (TREE_TYPE (decl)) == BLKmode) |
ddd2d57e RH |
811 | error ("%Jdata type of '%D' isn't suitable for a register", |
812 | decl, decl); | |
63ad61ed | 813 | else if (! HARD_REGNO_MODE_OK (reg_number, TYPE_MODE (TREE_TYPE (decl)))) |
ddd2d57e RH |
814 | error ("%Jregister specified for '%D' isn't suitable for data type", |
815 | decl, decl); | |
79e68feb | 816 | /* Now handle properly declared static register variables. */ |
63ad61ed | 817 | else |
79e68feb RS |
818 | { |
819 | int nregs; | |
12266a61 | 820 | |
e3406b2a | 821 | if (DECL_INITIAL (decl) != 0 && TREE_STATIC (decl)) |
79e68feb RS |
822 | { |
823 | DECL_INITIAL (decl) = 0; | |
824 | error ("global register variable has initial value"); | |
825 | } | |
79e68feb RS |
826 | if (TREE_THIS_VOLATILE (decl)) |
827 | warning ("volatile register variables don't work as you might wish"); | |
31e4b1c0 RK |
828 | |
829 | /* If the user specified one of the eliminables registers here, | |
830 | e.g., FRAME_POINTER_REGNUM, we don't want to get this variable | |
3ada20ee RH |
831 | confused with that register and be eliminated. This usage is |
832 | somewhat suspect... */ | |
833 | ||
834 | SET_DECL_RTL (decl, gen_rtx_raw_REG (DECL_MODE (decl), reg_number)); | |
835 | ORIGINAL_REGNO (DECL_RTL (decl)) = reg_number; | |
79e68feb RS |
836 | REG_USERVAR_P (DECL_RTL (decl)) = 1; |
837 | ||
6c418184 | 838 | if (TREE_STATIC (decl)) |
79e68feb | 839 | { |
ad800eb1 RK |
840 | /* Make this register global, so not usable for anything |
841 | else. */ | |
1cb36a98 RH |
842 | #ifdef ASM_DECLARE_REGISTER_GLOBAL |
843 | ASM_DECLARE_REGISTER_GLOBAL (asm_out_file, decl, reg_number, name); | |
844 | #endif | |
66fd46b6 | 845 | nregs = hard_regno_nregs[reg_number][DECL_MODE (decl)]; |
79e68feb | 846 | while (nregs > 0) |
ad800eb1 | 847 | globalize_reg (reg_number + --nregs); |
79e68feb | 848 | } |
79e68feb | 849 | |
63ad61ed ZW |
850 | /* As a register variable, it has no section. */ |
851 | return; | |
852 | } | |
853 | } | |
0a5152d0 | 854 | |
63ad61ed ZW |
855 | /* Now handle ordinary static variables and functions (in memory). |
856 | Also handle vars declared register invalidly. */ | |
857 | ||
858 | if (reg_number >= 0 || reg_number == -3) | |
ddd2d57e | 859 | error ("%Jregister name given for non-register variable '%D'", decl, decl); |
63ad61ed ZW |
860 | |
861 | /* Specifying a section attribute on a variable forces it into a | |
2d76cb1a | 862 | non-.bss section, and thus it cannot be common. */ |
63ad61ed ZW |
863 | if (TREE_CODE (decl) == VAR_DECL |
864 | && DECL_SECTION_NAME (decl) != NULL_TREE | |
865 | && DECL_INITIAL (decl) == NULL_TREE | |
866 | && DECL_COMMON (decl)) | |
867 | DECL_COMMON (decl) = 0; | |
868 | ||
5ff225fc MM |
869 | /* Variables can't be both common and weak. */ |
870 | if (TREE_CODE (decl) == VAR_DECL && DECL_WEAK (decl)) | |
871 | DECL_COMMON (decl) = 0; | |
872 | ||
52859c77 RH |
873 | x = gen_rtx_SYMBOL_REF (Pmode, name); |
874 | SYMBOL_REF_WEAK (x) = DECL_WEAK (decl); | |
875 | SYMBOL_REF_DECL (x) = decl; | |
2e1eedd6 | 876 | |
52859c77 | 877 | x = gen_rtx_MEM (DECL_MODE (decl), x); |
63ad61ed | 878 | if (TREE_CODE (decl) != FUNCTION_DECL) |
abde42f7 JH |
879 | set_mem_attributes (x, decl, 1); |
880 | SET_DECL_RTL (decl, x); | |
63ad61ed ZW |
881 | |
882 | /* Optionally set flags or add text to the name to record information | |
883 | such as that it is a function name. | |
884 | If the name is changed, the macro ASM_OUTPUT_LABELREF | |
885 | will have to know how to strip this information. */ | |
245f1bfa | 886 | targetm.encode_section_info (decl, DECL_RTL (decl), true); |
6de9cd9a DN |
887 | |
888 | /* Make this function static known to the mudflap runtime. */ | |
889 | if (flag_mudflap && TREE_CODE (decl) == VAR_DECL) | |
890 | mudflap_enqueue_decl (decl); | |
79e68feb | 891 | } |
4724d87a RS |
892 | |
893 | /* Make the rtl for variable VAR be volatile. | |
894 | Use this only for static variables. */ | |
895 | ||
fcbaecc6 | 896 | void |
2e1eedd6 | 897 | make_var_volatile (tree var) |
4724d87a | 898 | { |
3c0cb5de | 899 | if (!MEM_P (DECL_RTL (var))) |
4724d87a RS |
900 | abort (); |
901 | ||
902 | MEM_VOLATILE_P (DECL_RTL (var)) = 1; | |
903 | } | |
79e68feb RS |
904 | \f |
905 | /* Output a string of literal assembler code | |
906 | for an `asm' keyword used between functions. */ | |
907 | ||
908 | void | |
2e1eedd6 | 909 | assemble_asm (tree string) |
79e68feb RS |
910 | { |
911 | app_enable (); | |
912 | ||
913 | if (TREE_CODE (string) == ADDR_EXPR) | |
914 | string = TREE_OPERAND (string, 0); | |
915 | ||
916 | fprintf (asm_out_file, "\t%s\n", TREE_STRING_POINTER (string)); | |
917 | } | |
918 | ||
2cc07db4 RH |
919 | /* Record an element in the table of global destructors. SYMBOL is |
920 | a SYMBOL_REF of the function to be called; PRIORITY is a number | |
921 | between 0 and MAX_INIT_PRIORITY. */ | |
79e68feb RS |
922 | |
923 | void | |
2e1eedd6 | 924 | default_stabs_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
79e68feb | 925 | { |
2cc07db4 RH |
926 | /* Tell GNU LD that this is part of the static destructor set. |
927 | This will work for any system that uses stabs, most usefully | |
928 | aout systems. */ | |
929 | fprintf (asm_out_file, "%s\"___DTOR_LIST__\",22,0,0,", ASM_STABS_OP); | |
930 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
931 | fputc ('\n', asm_out_file); | |
932 | } | |
47907859 | 933 | |
2cc07db4 | 934 | void |
2e1eedd6 | 935 | default_named_section_asm_out_destructor (rtx symbol, int priority) |
2cc07db4 RH |
936 | { |
937 | const char *section = ".dtors"; | |
938 | char buf[16]; | |
47907859 | 939 | |
6d2f8887 | 940 | /* ??? This only works reliably with the GNU linker. */ |
2cc07db4 | 941 | if (priority != DEFAULT_INIT_PRIORITY) |
47907859 | 942 | { |
47907859 RH |
943 | sprintf (buf, ".dtors.%.5u", |
944 | /* Invert the numbering so the linker puts us in the proper | |
945 | order; constructors are run from right to left, and the | |
946 | linker sorts in increasing order. */ | |
947 | MAX_INIT_PRIORITY - priority); | |
2cc07db4 | 948 | section = buf; |
47907859 RH |
949 | } |
950 | ||
715bdd29 RH |
951 | named_section_flags (section, SECTION_WRITE); |
952 | assemble_align (POINTER_SIZE); | |
c8af3574 | 953 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); |
2cc07db4 RH |
954 | } |
955 | ||
956 | #ifdef DTORS_SECTION_ASM_OP | |
957 | void | |
2e1eedd6 | 958 | dtors_section (void) |
2cc07db4 RH |
959 | { |
960 | if (in_section != in_dtors) | |
79e68feb | 961 | { |
2cc07db4 RH |
962 | in_section = in_dtors; |
963 | fputs (DTORS_SECTION_ASM_OP, asm_out_file); | |
79e68feb RS |
964 | fputc ('\n', asm_out_file); |
965 | } | |
79e68feb RS |
966 | } |
967 | ||
2cc07db4 | 968 | void |
2e1eedd6 AJ |
969 | default_dtor_section_asm_out_destructor (rtx symbol, |
970 | int priority ATTRIBUTE_UNUSED) | |
2cc07db4 RH |
971 | { |
972 | dtors_section (); | |
c8af3574 RH |
973 | assemble_align (POINTER_SIZE); |
974 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 RH |
975 | } |
976 | #endif | |
977 | ||
79e68feb RS |
978 | /* Likewise for global constructors. */ |
979 | ||
980 | void | |
2e1eedd6 | 981 | default_stabs_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
79e68feb | 982 | { |
2cc07db4 RH |
983 | /* Tell GNU LD that this is part of the static destructor set. |
984 | This will work for any system that uses stabs, most usefully | |
985 | aout systems. */ | |
986 | fprintf (asm_out_file, "%s\"___CTOR_LIST__\",22,0,0,", ASM_STABS_OP); | |
987 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
988 | fputc ('\n', asm_out_file); | |
989 | } | |
47907859 | 990 | |
2cc07db4 | 991 | void |
2e1eedd6 | 992 | default_named_section_asm_out_constructor (rtx symbol, int priority) |
2cc07db4 RH |
993 | { |
994 | const char *section = ".ctors"; | |
995 | char buf[16]; | |
47907859 | 996 | |
6d2f8887 | 997 | /* ??? This only works reliably with the GNU linker. */ |
2cc07db4 | 998 | if (priority != DEFAULT_INIT_PRIORITY) |
47907859 | 999 | { |
47907859 RH |
1000 | sprintf (buf, ".ctors.%.5u", |
1001 | /* Invert the numbering so the linker puts us in the proper | |
1002 | order; constructors are run from right to left, and the | |
1003 | linker sorts in increasing order. */ | |
1004 | MAX_INIT_PRIORITY - priority); | |
2cc07db4 | 1005 | section = buf; |
47907859 RH |
1006 | } |
1007 | ||
715bdd29 | 1008 | named_section_flags (section, SECTION_WRITE); |
c8af3574 RH |
1009 | assemble_align (POINTER_SIZE); |
1010 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 RH |
1011 | } |
1012 | ||
1013 | #ifdef CTORS_SECTION_ASM_OP | |
1014 | void | |
2e1eedd6 | 1015 | ctors_section (void) |
2cc07db4 RH |
1016 | { |
1017 | if (in_section != in_ctors) | |
79e68feb | 1018 | { |
2cc07db4 RH |
1019 | in_section = in_ctors; |
1020 | fputs (CTORS_SECTION_ASM_OP, asm_out_file); | |
79e68feb RS |
1021 | fputc ('\n', asm_out_file); |
1022 | } | |
79e68feb | 1023 | } |
2cc07db4 RH |
1024 | |
1025 | void | |
2e1eedd6 AJ |
1026 | default_ctor_section_asm_out_constructor (rtx symbol, |
1027 | int priority ATTRIBUTE_UNUSED) | |
2cc07db4 RH |
1028 | { |
1029 | ctors_section (); | |
c8af3574 RH |
1030 | assemble_align (POINTER_SIZE); |
1031 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 RH |
1032 | } |
1033 | #endif | |
79e68feb | 1034 | \f |
97adc6ed | 1035 | /* CONSTANT_POOL_BEFORE_FUNCTION may be defined as an expression with |
0e9e1e0a | 1036 | a nonzero value if the constant pool should be output before the |
97adc6ed ILT |
1037 | start of the function, or a zero value if the pool should output |
1038 | after the end of the function. The default is to put it before the | |
1039 | start. */ | |
1040 | ||
1041 | #ifndef CONSTANT_POOL_BEFORE_FUNCTION | |
1042 | #define CONSTANT_POOL_BEFORE_FUNCTION 1 | |
1043 | #endif | |
1044 | ||
810db579 JH |
1045 | /* DECL is an object (either VAR_DECL or FUNCTION_DECL) which is going |
1046 | to be output to assembler. | |
1047 | Set first_global_object_name and weak_global_object_name as appropriate. */ | |
1048 | ||
1049 | void | |
1050 | notice_global_symbol (tree decl) | |
1051 | { | |
8af11e80 JH |
1052 | const char **type = &first_global_object_name; |
1053 | ||
1054 | if (first_global_object_name | |
1055 | || !TREE_PUBLIC (decl) || DECL_EXTERNAL (decl) | |
1056 | || !DECL_NAME (decl) | |
1057 | || (TREE_CODE (decl) != FUNCTION_DECL | |
1058 | && (TREE_CODE (decl) != VAR_DECL | |
1059 | || (DECL_COMMON (decl) | |
1060 | && (DECL_INITIAL (decl) == 0 | |
0f334035 | 1061 | || DECL_INITIAL (decl) == error_mark_node)))) |
3c0cb5de | 1062 | || !MEM_P (DECL_RTL (decl))) |
8af11e80 JH |
1063 | return; |
1064 | ||
321440fd | 1065 | /* We win when global object is found, but it is useful to know about weak |
8af11e80 JH |
1066 | symbol as well so we can produce nicer unique names. */ |
1067 | if (DECL_WEAK (decl) || DECL_ONE_ONLY (decl)) | |
1068 | type = &weak_global_object_name; | |
1069 | ||
1070 | if (!*type) | |
810db579 JH |
1071 | { |
1072 | const char *p; | |
1073 | char *name; | |
1074 | rtx decl_rtl = DECL_RTL (decl); | |
1075 | ||
245f1bfa | 1076 | p = targetm.strip_name_encoding (XSTR (XEXP (decl_rtl, 0), 0)); |
810db579 JH |
1077 | name = xstrdup (p); |
1078 | ||
8af11e80 | 1079 | *type = name; |
810db579 JH |
1080 | } |
1081 | } | |
1082 | ||
79e68feb RS |
1083 | /* Output assembler code for the constant pool of a function and associated |
1084 | with defining the name of the function. DECL describes the function. | |
1085 | NAME is the function's name. For the constant pool, we use the current | |
1086 | constant pool data. */ | |
1087 | ||
1088 | void | |
2e1eedd6 | 1089 | assemble_start_function (tree decl, const char *fnname) |
79e68feb RS |
1090 | { |
1091 | int align; | |
1092 | ||
750054a2 CT |
1093 | unlikely_section_label_printed = false; |
1094 | ||
79e68feb RS |
1095 | /* The following code does not need preprocessing in the assembler. */ |
1096 | ||
1097 | app_disable (); | |
1098 | ||
97adc6ed ILT |
1099 | if (CONSTANT_POOL_BEFORE_FUNCTION) |
1100 | output_constant_pool (fnname, decl); | |
79e68feb | 1101 | |
1b18fc2c | 1102 | resolve_unique_section (decl, 0, flag_function_sections); |
4d1065ed | 1103 | function_section (decl); |
79e68feb RS |
1104 | |
1105 | /* Tell assembler to move to target machine's alignment for functions. */ | |
1106 | align = floor_log2 (FUNCTION_BOUNDARY / BITS_PER_UNIT); | |
f963b5d9 RS |
1107 | if (align < force_align_functions_log) |
1108 | align = force_align_functions_log; | |
79e68feb | 1109 | if (align > 0) |
91ea4f8d KG |
1110 | { |
1111 | ASM_OUTPUT_ALIGN (asm_out_file, align); | |
1112 | } | |
79e68feb | 1113 | |
efa3896a GK |
1114 | /* Handle a user-specified function alignment. |
1115 | Note that we still need to align to FUNCTION_BOUNDARY, as above, | |
1116 | because ASM_OUTPUT_MAX_SKIP_ALIGN might not do any alignment at all. */ | |
194734e9 JH |
1117 | if (align_functions_log > align |
1118 | && cfun->function_frequency != FUNCTION_FREQUENCY_UNLIKELY_EXECUTED) | |
efa3896a GK |
1119 | { |
1120 | #ifdef ASM_OUTPUT_MAX_SKIP_ALIGN | |
46f9491e | 1121 | ASM_OUTPUT_MAX_SKIP_ALIGN (asm_out_file, |
c26fbbca | 1122 | align_functions_log, align_functions - 1); |
efa3896a GK |
1123 | #else |
1124 | ASM_OUTPUT_ALIGN (asm_out_file, align_functions_log); | |
1125 | #endif | |
1126 | } | |
1127 | ||
79e68feb RS |
1128 | #ifdef ASM_OUTPUT_FUNCTION_PREFIX |
1129 | ASM_OUTPUT_FUNCTION_PREFIX (asm_out_file, fnname); | |
1130 | #endif | |
1131 | ||
653e276c | 1132 | (*debug_hooks->begin_function) (decl); |
79e68feb RS |
1133 | |
1134 | /* Make function name accessible from other files, if appropriate. */ | |
1135 | ||
1136 | if (TREE_PUBLIC (decl)) | |
1137 | { | |
810db579 | 1138 | notice_global_symbol (decl); |
06bb02f7 | 1139 | |
19c5b1cf | 1140 | globalize_decl (decl); |
b14707c3 RH |
1141 | |
1142 | maybe_assemble_visibility (decl); | |
79e68feb RS |
1143 | } |
1144 | ||
6614fd40 | 1145 | /* Do any machine/system dependent processing of the function name. */ |
8bd16853 | 1146 | #ifdef ASM_DECLARE_FUNCTION_NAME |
b93a436e | 1147 | ASM_DECLARE_FUNCTION_NAME (asm_out_file, fnname, current_function_decl); |
8bd16853 | 1148 | #else |
b93a436e JL |
1149 | /* Standard thing is just output label for the function. */ |
1150 | ASM_OUTPUT_LABEL (asm_out_file, fnname); | |
79e68feb RS |
1151 | #endif /* ASM_DECLARE_FUNCTION_NAME */ |
1152 | } | |
1153 | ||
1154 | /* Output assembler code associated with defining the size of the | |
1155 | function. DECL describes the function. NAME is the function's name. */ | |
1156 | ||
1157 | void | |
2e1eedd6 | 1158 | assemble_end_function (tree decl, const char *fnname) |
79e68feb RS |
1159 | { |
1160 | #ifdef ASM_DECLARE_FUNCTION_SIZE | |
1161 | ASM_DECLARE_FUNCTION_SIZE (asm_out_file, fnname, decl); | |
1162 | #endif | |
97adc6ed | 1163 | if (! CONSTANT_POOL_BEFORE_FUNCTION) |
83488369 RK |
1164 | { |
1165 | output_constant_pool (fnname, decl); | |
1166 | function_section (decl); /* need to switch back */ | |
1167 | } | |
79e68feb RS |
1168 | } |
1169 | \f | |
1170 | /* Assemble code to leave SIZE bytes of zeros. */ | |
1171 | ||
1172 | void | |
2e1eedd6 | 1173 | assemble_zeros (unsigned HOST_WIDE_INT size) |
79e68feb | 1174 | { |
3c350eb3 CB |
1175 | /* Do no output if -fsyntax-only. */ |
1176 | if (flag_syntax_only) | |
1177 | return; | |
1178 | ||
79e68feb RS |
1179 | #ifdef ASM_NO_SKIP_IN_TEXT |
1180 | /* The `space' pseudo in the text section outputs nop insns rather than 0s, | |
1181 | so we must output 0s explicitly in the text section. */ | |
750054a2 CT |
1182 | if ((ASM_NO_SKIP_IN_TEXT && in_text_section ()) |
1183 | || (ASM_NO_SKIP_IN_TEXT && in_unlikely_text_section ())) | |
79e68feb | 1184 | { |
58e15542 | 1185 | unsigned HOST_WIDE_INT i; |
c8af3574 RH |
1186 | for (i = 0; i < size; i++) |
1187 | assemble_integer (const0_rtx, 1, BITS_PER_UNIT, 1); | |
79e68feb RS |
1188 | } |
1189 | else | |
1190 | #endif | |
41fe4d9e | 1191 | if (size > 0) |
b93a436e | 1192 | ASM_OUTPUT_SKIP (asm_out_file, size); |
79e68feb RS |
1193 | } |
1194 | ||
a785e67e RS |
1195 | /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */ |
1196 | ||
1197 | void | |
2e1eedd6 | 1198 | assemble_align (int align) |
a785e67e RS |
1199 | { |
1200 | if (align > BITS_PER_UNIT) | |
91ea4f8d KG |
1201 | { |
1202 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT)); | |
1203 | } | |
a785e67e RS |
1204 | } |
1205 | ||
79e68feb RS |
1206 | /* Assemble a string constant with the specified C string as contents. */ |
1207 | ||
1208 | void | |
2e1eedd6 | 1209 | assemble_string (const char *p, int size) |
79e68feb | 1210 | { |
79e68feb RS |
1211 | int pos = 0; |
1212 | int maximum = 2000; | |
1213 | ||
1214 | /* If the string is very long, split it up. */ | |
1215 | ||
1216 | while (pos < size) | |
1217 | { | |
1218 | int thissize = size - pos; | |
1219 | if (thissize > maximum) | |
1220 | thissize = maximum; | |
1221 | ||
b93a436e | 1222 | ASM_OUTPUT_ASCII (asm_out_file, p, thissize); |
79e68feb RS |
1223 | |
1224 | pos += thissize; | |
1225 | p += thissize; | |
1226 | } | |
1227 | } | |
69249c1b | 1228 | |
79e68feb | 1229 | \f |
b8694195 NC |
1230 | #if defined ASM_OUTPUT_ALIGNED_DECL_LOCAL |
1231 | #define ASM_EMIT_LOCAL(decl, name, size, rounded) \ | |
1232 | ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, decl, name, size, DECL_ALIGN (decl)) | |
1233 | #else | |
1234 | #if defined ASM_OUTPUT_ALIGNED_LOCAL | |
1235 | #define ASM_EMIT_LOCAL(decl, name, size, rounded) \ | |
1236 | ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, DECL_ALIGN (decl)) | |
1237 | #else | |
1238 | #define ASM_EMIT_LOCAL(decl, name, size, rounded) \ | |
1239 | ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded) | |
1240 | #endif | |
1241 | #endif | |
1242 | ||
1243 | #if defined ASM_OUTPUT_ALIGNED_BSS | |
1244 | #define ASM_EMIT_BSS(decl, name, size, rounded) \ | |
1245 | ASM_OUTPUT_ALIGNED_BSS (asm_out_file, decl, name, size, DECL_ALIGN (decl)) | |
1246 | #else | |
1247 | #if defined ASM_OUTPUT_BSS | |
1248 | #define ASM_EMIT_BSS(decl, name, size, rounded) \ | |
1249 | ASM_OUTPUT_BSS (asm_out_file, decl, name, size, rounded) | |
1250 | #else | |
1251 | #undef ASM_EMIT_BSS | |
1252 | #endif | |
1253 | #endif | |
1254 | ||
1255 | #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON | |
1256 | #define ASM_EMIT_COMMON(decl, name, size, rounded) \ | |
1257 | ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, decl, name, size, DECL_ALIGN (decl)) | |
1258 | #else | |
1259 | #if defined ASM_OUTPUT_ALIGNED_COMMON | |
1260 | #define ASM_EMIT_COMMON(decl, name, size, rounded) \ | |
1261 | ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, name, size, DECL_ALIGN (decl)) | |
1262 | #else | |
1263 | #define ASM_EMIT_COMMON(decl, name, size, rounded) \ | |
1264 | ASM_OUTPUT_COMMON (asm_out_file, name, size, rounded) | |
1265 | #endif | |
1266 | #endif | |
1267 | ||
54fbf6a1 | 1268 | static bool |
2e1eedd6 AJ |
1269 | asm_emit_uninitialised (tree decl, const char *name, |
1270 | unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED, | |
1271 | unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED) | |
b8694195 | 1272 | { |
a56e7c08 NC |
1273 | enum |
1274 | { | |
b8694195 NC |
1275 | asm_dest_common, |
1276 | asm_dest_bss, | |
1277 | asm_dest_local | |
1278 | } | |
1279 | destination = asm_dest_local; | |
46f9491e | 1280 | |
54fbf6a1 DE |
1281 | /* ??? We should handle .bss via select_section mechanisms rather than |
1282 | via special target hooks. That would eliminate this special case. */ | |
b8694195 NC |
1283 | if (TREE_PUBLIC (decl)) |
1284 | { | |
54fbf6a1 DE |
1285 | if (!DECL_COMMON (decl)) |
1286 | #ifdef ASM_EMIT_BSS | |
b8694195 | 1287 | destination = asm_dest_bss; |
54fbf6a1 DE |
1288 | #else |
1289 | return false; | |
46f9491e | 1290 | #endif |
54fbf6a1 | 1291 | else |
b8694195 NC |
1292 | destination = asm_dest_common; |
1293 | } | |
1294 | ||
1bd6476f RH |
1295 | if (destination == asm_dest_bss) |
1296 | globalize_decl (decl); | |
1b18fc2c | 1297 | resolve_unique_section (decl, 0, flag_data_sections); |
ecb0eece | 1298 | |
b8694195 NC |
1299 | if (flag_shared_data) |
1300 | { | |
1301 | switch (destination) | |
1302 | { | |
1303 | #ifdef ASM_OUTPUT_SHARED_BSS | |
1304 | case asm_dest_bss: | |
1305 | ASM_OUTPUT_SHARED_BSS (asm_out_file, decl, name, size, rounded); | |
1306 | return; | |
1307 | #endif | |
1308 | #ifdef ASM_OUTPUT_SHARED_COMMON | |
1309 | case asm_dest_common: | |
1310 | ASM_OUTPUT_SHARED_COMMON (asm_out_file, name, size, rounded); | |
1311 | return; | |
1312 | #endif | |
1313 | #ifdef ASM_OUTPUT_SHARED_LOCAL | |
1314 | case asm_dest_local: | |
1315 | ASM_OUTPUT_SHARED_LOCAL (asm_out_file, name, size, rounded); | |
1316 | return; | |
1317 | #endif | |
1318 | default: | |
1319 | break; | |
1320 | } | |
1321 | } | |
1322 | ||
1323 | switch (destination) | |
1324 | { | |
1325 | #ifdef ASM_EMIT_BSS | |
1326 | case asm_dest_bss: | |
1327 | ASM_EMIT_BSS (decl, name, size, rounded); | |
1328 | break; | |
1329 | #endif | |
1330 | case asm_dest_common: | |
1331 | ASM_EMIT_COMMON (decl, name, size, rounded); | |
1332 | break; | |
1333 | case asm_dest_local: | |
1334 | ASM_EMIT_LOCAL (decl, name, size, rounded); | |
1335 | break; | |
1336 | default: | |
1337 | abort (); | |
1338 | } | |
1339 | ||
54fbf6a1 | 1340 | return true; |
b8694195 NC |
1341 | } |
1342 | ||
79e68feb RS |
1343 | /* Assemble everything that is needed for a variable or function declaration. |
1344 | Not used for automatic variables, and not used for function definitions. | |
1345 | Should not be called for variables of incomplete structure type. | |
1346 | ||
1347 | TOP_LEVEL is nonzero if this variable has file scope. | |
1348 | AT_END is nonzero if this is the special handling, at end of compilation, | |
ff8f4401 RS |
1349 | to define things that have had only tentative definitions. |
1350 | DONT_OUTPUT_DATA if nonzero means don't actually output the | |
1351 | initial value (that will be done by the caller). */ | |
79e68feb RS |
1352 | |
1353 | void | |
2e1eedd6 AJ |
1354 | assemble_variable (tree decl, int top_level ATTRIBUTE_UNUSED, |
1355 | int at_end ATTRIBUTE_UNUSED, int dont_output_data) | |
79e68feb | 1356 | { |
b3694847 | 1357 | const char *name; |
f8344bea | 1358 | unsigned int align; |
79e68feb | 1359 | int reloc = 0; |
17eee61c | 1360 | rtx decl_rtl; |
79e68feb | 1361 | |
d35543c0 | 1362 | if (lang_hooks.decls.prepare_assemble_variable) |
ae2bcd98 | 1363 | lang_hooks.decls.prepare_assemble_variable (decl); |
d35543c0 | 1364 | |
cbed4565 RS |
1365 | last_assemble_variable_decl = 0; |
1366 | ||
d36d70cc | 1367 | /* Normally no need to say anything here for external references, |
9faa82d8 | 1368 | since assemble_external is called by the language-specific code |
d36d70cc | 1369 | when a declaration is first seen. */ |
79e68feb | 1370 | |
44fe2e80 | 1371 | if (DECL_EXTERNAL (decl)) |
79e68feb RS |
1372 | return; |
1373 | ||
1374 | /* Output no assembler code for a function declaration. | |
1375 | Only definitions of functions output anything. */ | |
1376 | ||
1377 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
1378 | return; | |
1379 | ||
3914abb4 | 1380 | /* Do nothing for global register variables. */ |
f8cfc6aa | 1381 | if (DECL_RTL_SET_P (decl) && REG_P (DECL_RTL (decl))) |
3914abb4 NB |
1382 | { |
1383 | TREE_ASM_WRITTEN (decl) = 1; | |
1384 | return; | |
1385 | } | |
1386 | ||
79e68feb RS |
1387 | /* If type was incomplete when the variable was declared, |
1388 | see if it is complete now. */ | |
1389 | ||
1390 | if (DECL_SIZE (decl) == 0) | |
1391 | layout_decl (decl, 0); | |
1392 | ||
1393 | /* Still incomplete => don't allocate it; treat the tentative defn | |
1394 | (which is what it must have been) as an `extern' reference. */ | |
1395 | ||
ff8f4401 | 1396 | if (!dont_output_data && DECL_SIZE (decl) == 0) |
79e68feb | 1397 | { |
ddd2d57e | 1398 | error ("%Jstorage size of `%D' isn't known", decl, decl); |
1c1a7ba4 | 1399 | TREE_ASM_WRITTEN (decl) = 1; |
79e68feb RS |
1400 | return; |
1401 | } | |
1402 | ||
1403 | /* The first declaration of a variable that comes through this function | |
1404 | decides whether it is global (in C, has external linkage) | |
1405 | or local (in C, has internal linkage). So do nothing more | |
1406 | if this function has already run. */ | |
1407 | ||
1408 | if (TREE_ASM_WRITTEN (decl)) | |
1409 | return; | |
1410 | ||
fb49053f RH |
1411 | /* Make sure targetm.encode_section_info is invoked before we set |
1412 | ASM_WRITTEN. */ | |
17eee61c | 1413 | decl_rtl = DECL_RTL (decl); |
46f9491e | 1414 | |
79e68feb RS |
1415 | TREE_ASM_WRITTEN (decl) = 1; |
1416 | ||
3c350eb3 CB |
1417 | /* Do no output if -fsyntax-only. */ |
1418 | if (flag_syntax_only) | |
1419 | return; | |
1420 | ||
809d6575 | 1421 | app_disable (); |
79e68feb | 1422 | |
770ae6cc RK |
1423 | if (! dont_output_data |
1424 | && ! host_integerp (DECL_SIZE_UNIT (decl), 1)) | |
ff8f4401 | 1425 | { |
ddd2d57e | 1426 | error ("%Jsize of variable '%D' is too large", decl, decl); |
544f03b4 | 1427 | return; |
79e68feb RS |
1428 | } |
1429 | ||
17eee61c | 1430 | name = XSTR (XEXP (decl_rtl, 0), 0); |
810db579 JH |
1431 | if (TREE_PUBLIC (decl) && DECL_NAME (decl)) |
1432 | notice_global_symbol (decl); | |
f796d997 | 1433 | |
8a198bd2 JW |
1434 | /* Compute the alignment of this data. */ |
1435 | ||
1436 | align = DECL_ALIGN (decl); | |
1437 | ||
1438 | /* In the case for initialing an array whose length isn't specified, | |
1439 | where we have not yet been able to do the layout, | |
1440 | figure out the proper alignment now. */ | |
1441 | if (dont_output_data && DECL_SIZE (decl) == 0 | |
1442 | && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
1443 | align = MAX (align, TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl)))); | |
1444 | ||
1445 | /* Some object file formats have a maximum alignment which they support. | |
1446 | In particular, a.out format supports a maximum alignment of 4. */ | |
1447 | #ifndef MAX_OFILE_ALIGNMENT | |
1448 | #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT | |
1449 | #endif | |
1450 | if (align > MAX_OFILE_ALIGNMENT) | |
1451 | { | |
ddd2d57e RH |
1452 | warning ("%Jalignment of '%D' is greater than maximum object " |
1453 | "file alignment. Using %d", decl, decl, | |
1454 | MAX_OFILE_ALIGNMENT/BITS_PER_UNIT); | |
8a198bd2 JW |
1455 | align = MAX_OFILE_ALIGNMENT; |
1456 | } | |
1457 | ||
1458 | /* On some machines, it is good to increase alignment sometimes. */ | |
51084e13 RH |
1459 | if (! DECL_USER_ALIGN (decl)) |
1460 | { | |
8a198bd2 | 1461 | #ifdef DATA_ALIGNMENT |
51084e13 | 1462 | align = DATA_ALIGNMENT (TREE_TYPE (decl), align); |
8a198bd2 JW |
1463 | #endif |
1464 | #ifdef CONSTANT_ALIGNMENT | |
51084e13 | 1465 | if (DECL_INITIAL (decl) != 0 && DECL_INITIAL (decl) != error_mark_node) |
41077ce4 | 1466 | align = CONSTANT_ALIGNMENT (DECL_INITIAL (decl), align); |
8a198bd2 | 1467 | #endif |
51084e13 | 1468 | } |
8a198bd2 JW |
1469 | |
1470 | /* Reset the alignment in case we have made it tighter, so we can benefit | |
1471 | from it in get_pointer_alignment. */ | |
1472 | DECL_ALIGN (decl) = align; | |
c952ff4b | 1473 | set_mem_align (decl_rtl, align); |
8a198bd2 | 1474 | |
b14707c3 RH |
1475 | if (TREE_PUBLIC (decl)) |
1476 | maybe_assemble_visibility (decl); | |
1477 | ||
15409448 JM |
1478 | /* Output any data that we will need to use the address of. */ |
1479 | if (DECL_INITIAL (decl) == error_mark_node) | |
1480 | reloc = contains_pointers_p (TREE_TYPE (decl)) ? 3 : 0; | |
1481 | else if (DECL_INITIAL (decl)) | |
b2218cc1 AO |
1482 | { |
1483 | reloc = compute_reloc_for_constant (DECL_INITIAL (decl)); | |
1484 | output_addressed_constants (DECL_INITIAL (decl)); | |
1485 | } | |
d88a8ff5 | 1486 | resolve_unique_section (decl, reloc, flag_data_sections); |
15409448 | 1487 | |
79e68feb RS |
1488 | /* Handle uninitialized definitions. */ |
1489 | ||
3d78f2e9 RH |
1490 | /* If the decl has been given an explicit section name, then it |
1491 | isn't common, and shouldn't be handled as such. */ | |
1492 | if (DECL_SECTION_NAME (decl) || dont_output_data) | |
1493 | ; | |
1494 | /* We don't implement common thread-local data at present. */ | |
1495 | else if (DECL_THREAD_LOCAL (decl)) | |
1496 | { | |
1497 | if (DECL_COMMON (decl)) | |
1498 | sorry ("thread-local COMMON data not implemented"); | |
1499 | } | |
3d78f2e9 RH |
1500 | else if (DECL_INITIAL (decl) == 0 |
1501 | || DECL_INITIAL (decl) == error_mark_node | |
41077ce4 | 1502 | || (flag_zero_initialized_in_bss |
af75fb67 JM |
1503 | /* Leave constant zeroes in .rodata so they can be shared. */ |
1504 | && !TREE_READONLY (decl) | |
3d78f2e9 | 1505 | && initializer_zerop (DECL_INITIAL (decl)))) |
79e68feb | 1506 | { |
770ae6cc RK |
1507 | unsigned HOST_WIDE_INT size = tree_low_cst (DECL_SIZE_UNIT (decl), 1); |
1508 | unsigned HOST_WIDE_INT rounded = size; | |
79e68feb | 1509 | |
79e68feb RS |
1510 | /* Don't allocate zero bytes of common, |
1511 | since that means "undefined external" in the linker. */ | |
770ae6cc RK |
1512 | if (size == 0) |
1513 | rounded = 1; | |
1514 | ||
79e68feb RS |
1515 | /* Round size up to multiple of BIGGEST_ALIGNMENT bits |
1516 | so that each uninitialized object starts on such a boundary. */ | |
1517 | rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1; | |
1518 | rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT) | |
1519 | * (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); | |
46f9491e | 1520 | |
ec1bff50 | 1521 | #if !defined(ASM_OUTPUT_ALIGNED_COMMON) && !defined(ASM_OUTPUT_ALIGNED_DECL_COMMON) && !defined(ASM_OUTPUT_ALIGNED_BSS) |
4cf7705a | 1522 | if ((unsigned HOST_WIDE_INT) DECL_ALIGN (decl) / BITS_PER_UNIT > rounded) |
ddd2d57e RH |
1523 | warning ("%Jrequested alignment for '%D' is greater than " |
1524 | "implemented alignment of %d", decl, decl, rounded); | |
4bcfa7a8 | 1525 | #endif |
46f9491e | 1526 | |
54fbf6a1 DE |
1527 | /* If the target cannot output uninitialized but not common global data |
1528 | in .bss, then we have to use .data, so fall through. */ | |
1529 | if (asm_emit_uninitialised (decl, name, size, rounded)) | |
1530 | return; | |
79e68feb RS |
1531 | } |
1532 | ||
e5887033 DE |
1533 | /* Handle initialized definitions. |
1534 | Also handle uninitialized global definitions if -fno-common and the | |
1535 | target doesn't support ASM_OUTPUT_BSS. */ | |
79e68feb RS |
1536 | |
1537 | /* First make the assembler name(s) global if appropriate. */ | |
1538 | if (TREE_PUBLIC (decl) && DECL_NAME (decl)) | |
19c5b1cf | 1539 | globalize_decl (decl); |
79e68feb | 1540 | |
f9da1f35 DE |
1541 | /* Switch to the appropriate section. */ |
1542 | variable_section (decl, reloc); | |
79e68feb | 1543 | |
a8e2f179 | 1544 | /* dbxout.c needs to know this. */ |
750054a2 | 1545 | if (in_text_section () || in_unlikely_text_section ()) |
a8e2f179 RS |
1546 | DECL_IN_TEXT_SECTION (decl) = 1; |
1547 | ||
8a198bd2 | 1548 | /* Output the alignment of this data. */ |
79e68feb | 1549 | if (align > BITS_PER_UNIT) |
91ea4f8d KG |
1550 | { |
1551 | ASM_OUTPUT_ALIGN (asm_out_file, | |
1552 | floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT)); | |
1553 | } | |
79e68feb RS |
1554 | |
1555 | /* Do any machine/system dependent processing of the object. */ | |
8bd16853 | 1556 | #ifdef ASM_DECLARE_OBJECT_NAME |
b93a436e JL |
1557 | last_assemble_variable_decl = decl; |
1558 | ASM_DECLARE_OBJECT_NAME (asm_out_file, name, decl); | |
8bd16853 | 1559 | #else |
b93a436e JL |
1560 | /* Standard thing is just output label for the object. */ |
1561 | ASM_OUTPUT_LABEL (asm_out_file, name); | |
79e68feb RS |
1562 | #endif /* ASM_DECLARE_OBJECT_NAME */ |
1563 | ||
ff8f4401 | 1564 | if (!dont_output_data) |
79e68feb | 1565 | { |
08a8c6b6 JB |
1566 | if (DECL_INITIAL (decl) |
1567 | && DECL_INITIAL (decl) != error_mark_node | |
1568 | && !initializer_zerop (DECL_INITIAL (decl))) | |
ff8f4401 | 1569 | /* Output the actual data. */ |
770ae6cc | 1570 | output_constant (DECL_INITIAL (decl), |
c8af3574 RH |
1571 | tree_low_cst (DECL_SIZE_UNIT (decl), 1), |
1572 | align); | |
ff8f4401 RS |
1573 | else |
1574 | /* Leave space for it. */ | |
770ae6cc | 1575 | assemble_zeros (tree_low_cst (DECL_SIZE_UNIT (decl), 1)); |
79e68feb | 1576 | } |
79e68feb RS |
1577 | } |
1578 | ||
2e9effae RS |
1579 | /* Return 1 if type TYPE contains any pointers. */ |
1580 | ||
1581 | static int | |
2e1eedd6 | 1582 | contains_pointers_p (tree type) |
2e9effae RS |
1583 | { |
1584 | switch (TREE_CODE (type)) | |
1585 | { | |
1586 | case POINTER_TYPE: | |
1587 | case REFERENCE_TYPE: | |
1588 | /* I'm not sure whether OFFSET_TYPE needs this treatment, | |
1589 | so I'll play safe and return 1. */ | |
1590 | case OFFSET_TYPE: | |
1591 | return 1; | |
1592 | ||
1593 | case RECORD_TYPE: | |
1594 | case UNION_TYPE: | |
1595 | case QUAL_UNION_TYPE: | |
1596 | { | |
1597 | tree fields; | |
1598 | /* For a type that has fields, see if the fields have pointers. */ | |
1599 | for (fields = TYPE_FIELDS (type); fields; fields = TREE_CHAIN (fields)) | |
ce49ea8a JM |
1600 | if (TREE_CODE (fields) == FIELD_DECL |
1601 | && contains_pointers_p (TREE_TYPE (fields))) | |
2e9effae RS |
1602 | return 1; |
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | case ARRAY_TYPE: | |
1607 | /* An array type contains pointers if its element type does. */ | |
1608 | return contains_pointers_p (TREE_TYPE (type)); | |
1609 | ||
1610 | default: | |
1611 | return 0; | |
1612 | } | |
1613 | } | |
1614 | ||
9be6533a RS |
1615 | #ifdef ASM_OUTPUT_EXTERNAL |
1616 | /* True if DECL is a function decl for which no out-of-line copy exists. | |
1617 | It is assumed that DECL's assembler name has been set. */ | |
1618 | ||
1619 | static bool | |
1620 | incorporeal_function_p (tree decl) | |
1621 | { | |
1622 | if (TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl)) | |
1623 | { | |
1624 | const char *name; | |
1625 | ||
1626 | if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL | |
1627 | && DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA) | |
1628 | return true; | |
1629 | ||
1630 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
1631 | if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) | |
1632 | return true; | |
1633 | } | |
1634 | return false; | |
1635 | } | |
1636 | #endif | |
1637 | ||
79e68feb | 1638 | /* Output something to declare an external symbol to the assembler. |
fff9e713 MT |
1639 | (Most assemblers don't need this, so we normally output nothing.) |
1640 | Do nothing if DECL is not external. */ | |
79e68feb RS |
1641 | |
1642 | void | |
2e1eedd6 | 1643 | assemble_external (tree decl ATTRIBUTE_UNUSED) |
79e68feb | 1644 | { |
e6855a2d MM |
1645 | /* Because most platforms do not define ASM_OUTPUT_EXTERNAL, the |
1646 | main body of this code is only rarely exercised. To provide some | |
1647 | testing, on all platforms, we make sure that the ASM_OUT_FILE is | |
1648 | open. If it's not, we should not be calling this function. */ | |
1649 | if (!asm_out_file) | |
1650 | abort (); | |
1651 | ||
79e68feb | 1652 | #ifdef ASM_OUTPUT_EXTERNAL |
2f939d94 | 1653 | if (DECL_P (decl) && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl)) |
79e68feb | 1654 | { |
fff9e713 MT |
1655 | rtx rtl = DECL_RTL (decl); |
1656 | ||
3c0cb5de | 1657 | if (MEM_P (rtl) && GET_CODE (XEXP (rtl, 0)) == SYMBOL_REF |
9be6533a RS |
1658 | && !SYMBOL_REF_USED (XEXP (rtl, 0)) |
1659 | && !incorporeal_function_p (decl)) | |
fff9e713 MT |
1660 | { |
1661 | /* Some systems do require some output. */ | |
1662 | SYMBOL_REF_USED (XEXP (rtl, 0)) = 1; | |
1663 | ASM_OUTPUT_EXTERNAL (asm_out_file, decl, XSTR (XEXP (rtl, 0), 0)); | |
1664 | } | |
79e68feb RS |
1665 | } |
1666 | #endif | |
1667 | } | |
1668 | ||
1669 | /* Similar, for calling a library function FUN. */ | |
1670 | ||
1671 | void | |
6773a41c | 1672 | assemble_external_libcall (rtx fun) |
79e68feb | 1673 | { |
b93a436e JL |
1674 | /* Declare library function name external when first used, if nec. */ |
1675 | if (! SYMBOL_REF_USED (fun)) | |
79e68feb | 1676 | { |
b93a436e | 1677 | SYMBOL_REF_USED (fun) = 1; |
5fd9b178 | 1678 | targetm.asm_out.external_libcall (fun); |
79e68feb | 1679 | } |
79e68feb RS |
1680 | } |
1681 | ||
79e68feb RS |
1682 | /* Assemble a label named NAME. */ |
1683 | ||
1684 | void | |
2e1eedd6 | 1685 | assemble_label (const char *name) |
79e68feb | 1686 | { |
b93a436e | 1687 | ASM_OUTPUT_LABEL (asm_out_file, name); |
79e68feb RS |
1688 | } |
1689 | ||
bb9a388d | 1690 | /* Set the symbol_referenced flag for ID. */ |
4d7d0451 | 1691 | void |
2e1eedd6 | 1692 | mark_referenced (tree id) |
4d7d0451 | 1693 | { |
4d7d0451 JH |
1694 | TREE_SYMBOL_REFERENCED (id) = 1; |
1695 | } | |
1696 | ||
bb9a388d ZW |
1697 | /* Set the symbol_referenced flag for DECL and notify callgraph. */ |
1698 | void | |
1699 | mark_decl_referenced (tree decl) | |
1700 | { | |
1701 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
1702 | cgraph_mark_needed_node (cgraph_node (decl)); | |
1703 | else if (TREE_CODE (decl) == VAR_DECL) | |
1704 | cgraph_varpool_mark_needed_node (cgraph_varpool_node (decl)); | |
1705 | /* else do nothing - we can get various sorts of CST nodes here, | |
1706 | which do not need to be marked. */ | |
1707 | } | |
1708 | ||
79e68feb RS |
1709 | /* Output to FILE a reference to the assembler name of a C-level name NAME. |
1710 | If NAME starts with a *, the rest of NAME is output verbatim. | |
1711 | Otherwise NAME is transformed in an implementation-defined way | |
1712 | (usually by the addition of an underscore). | |
1713 | Many macros in the tm file are defined to call this function. */ | |
1714 | ||
1715 | void | |
2e1eedd6 | 1716 | assemble_name (FILE *file, const char *name) |
79e68feb | 1717 | { |
ec940faa | 1718 | const char *real_name; |
a94dbf2c | 1719 | tree id; |
648fb7cf | 1720 | |
245f1bfa | 1721 | real_name = targetm.strip_name_encoding (name); |
87907387 | 1722 | |
a94dbf2c JM |
1723 | id = maybe_get_identifier (real_name); |
1724 | if (id) | |
4d7d0451 | 1725 | mark_referenced (id); |
03e42132 | 1726 | |
79e68feb | 1727 | if (name[0] == '*') |
b93a436e | 1728 | fputs (&name[1], file); |
79e68feb | 1729 | else |
86aff125 | 1730 | ASM_OUTPUT_LABELREF (file, name); |
79e68feb RS |
1731 | } |
1732 | ||
1733 | /* Allocate SIZE bytes writable static space with a gensym name | |
1734 | and return an RTX to refer to its address. */ | |
1735 | ||
1736 | rtx | |
2e1eedd6 | 1737 | assemble_static_space (unsigned HOST_WIDE_INT size) |
79e68feb RS |
1738 | { |
1739 | char name[12]; | |
520a57c8 | 1740 | const char *namestring; |
79e68feb | 1741 | rtx x; |
79e68feb RS |
1742 | |
1743 | #if 0 | |
1744 | if (flag_shared_data) | |
1745 | data_section (); | |
1746 | #endif | |
1747 | ||
1748 | ASM_GENERATE_INTERNAL_LABEL (name, "LF", const_labelno); | |
1749 | ++const_labelno; | |
a8a05998 | 1750 | namestring = ggc_strdup (name); |
79e68feb | 1751 | |
b93a436e | 1752 | x = gen_rtx_SYMBOL_REF (Pmode, namestring); |
52859c77 | 1753 | SYMBOL_REF_FLAGS (x) = SYMBOL_FLAG_LOCAL; |
ca695ac9 | 1754 | |
e9a25f70 | 1755 | #ifdef ASM_OUTPUT_ALIGNED_DECL_LOCAL |
b93a436e JL |
1756 | ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, NULL_TREE, name, size, |
1757 | BIGGEST_ALIGNMENT); | |
e9a25f70 | 1758 | #else |
79e68feb | 1759 | #ifdef ASM_OUTPUT_ALIGNED_LOCAL |
b93a436e | 1760 | ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, BIGGEST_ALIGNMENT); |
79e68feb | 1761 | #else |
e016950d KG |
1762 | { |
1763 | /* Round size up to multiple of BIGGEST_ALIGNMENT bits | |
1764 | so that each uninitialized object starts on such a boundary. */ | |
2d76cb1a | 1765 | /* Variable `rounded' might or might not be used in ASM_OUTPUT_LOCAL. */ |
58e15542 | 1766 | unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED |
47c3ed98 KG |
1767 | = ((size + (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1) |
1768 | / (BIGGEST_ALIGNMENT / BITS_PER_UNIT) | |
1769 | * (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); | |
e016950d KG |
1770 | ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded); |
1771 | } | |
e9a25f70 | 1772 | #endif |
79e68feb RS |
1773 | #endif |
1774 | return x; | |
1775 | } | |
1776 | ||
1777 | /* Assemble the static constant template for function entry trampolines. | |
1778 | This is done at most once per compilation. | |
1779 | Returns an RTX for the address of the template. */ | |
1780 | ||
6de9cd9a DN |
1781 | static GTY(()) rtx initial_trampoline; |
1782 | ||
f0e969bd | 1783 | #ifdef TRAMPOLINE_TEMPLATE |
79e68feb | 1784 | rtx |
2e1eedd6 | 1785 | assemble_trampoline_template (void) |
79e68feb RS |
1786 | { |
1787 | char label[256]; | |
fc608b03 | 1788 | const char *name; |
79e68feb | 1789 | int align; |
52859c77 | 1790 | rtx symbol; |
79e68feb | 1791 | |
6de9cd9a DN |
1792 | if (initial_trampoline) |
1793 | return initial_trampoline; | |
1794 | ||
37552631 | 1795 | /* By default, put trampoline templates in read-only data section. */ |
f49acdb4 | 1796 | |
37552631 RS |
1797 | #ifdef TRAMPOLINE_SECTION |
1798 | TRAMPOLINE_SECTION (); | |
1799 | #else | |
c8c29f85 | 1800 | readonly_data_section (); |
37552631 | 1801 | #endif |
f49acdb4 | 1802 | |
79e68feb | 1803 | /* Write the assembler code to define one. */ |
073b0524 | 1804 | align = floor_log2 (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT); |
79e68feb | 1805 | if (align > 0) |
91ea4f8d KG |
1806 | { |
1807 | ASM_OUTPUT_ALIGN (asm_out_file, align); | |
1808 | } | |
79e68feb | 1809 | |
5fd9b178 | 1810 | targetm.asm_out.internal_label (asm_out_file, "LTRAMP", 0); |
79e68feb RS |
1811 | TRAMPOLINE_TEMPLATE (asm_out_file); |
1812 | ||
1813 | /* Record the rtl to refer to it. */ | |
1814 | ASM_GENERATE_INTERNAL_LABEL (label, "LTRAMP", 0); | |
a8a05998 | 1815 | name = ggc_strdup (label); |
52859c77 RH |
1816 | symbol = gen_rtx_SYMBOL_REF (Pmode, name); |
1817 | SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_LOCAL; | |
1818 | ||
6de9cd9a DN |
1819 | initial_trampoline = gen_rtx_MEM (BLKmode, symbol); |
1820 | set_mem_align (initial_trampoline, TRAMPOLINE_ALIGNMENT); | |
1821 | ||
1822 | return initial_trampoline; | |
79e68feb | 1823 | } |
f0e969bd | 1824 | #endif |
79e68feb | 1825 | \f |
c8af3574 RH |
1826 | /* A and B are either alignments or offsets. Return the minimum alignment |
1827 | that may be assumed after adding the two together. */ | |
1828 | ||
1829 | static inline unsigned | |
2e1eedd6 | 1830 | min_align (unsigned int a, unsigned int b) |
c8af3574 RH |
1831 | { |
1832 | return (a | b) & -(a | b); | |
1833 | } | |
79e68feb | 1834 | |
301d03af RS |
1835 | /* Return the assembler directive for creating a given kind of integer |
1836 | object. SIZE is the number of bytes in the object and ALIGNED_P | |
1837 | indicates whether it is known to be aligned. Return NULL if the | |
1838 | assembly dialect has no such directive. | |
79e68feb | 1839 | |
301d03af RS |
1840 | The returned string should be printed at the start of a new line and |
1841 | be followed immediately by the object's initial value. */ | |
1842 | ||
1843 | const char * | |
2e1eedd6 | 1844 | integer_asm_op (int size, int aligned_p) |
79e68feb | 1845 | { |
301d03af | 1846 | struct asm_int_op *ops; |
79e68feb | 1847 | |
301d03af RS |
1848 | if (aligned_p) |
1849 | ops = &targetm.asm_out.aligned_op; | |
c8af3574 | 1850 | else |
301d03af RS |
1851 | ops = &targetm.asm_out.unaligned_op; |
1852 | ||
1853 | switch (size) | |
c8af3574 | 1854 | { |
301d03af RS |
1855 | case 1: |
1856 | return targetm.asm_out.byte_op; | |
1857 | case 2: | |
1858 | return ops->hi; | |
1859 | case 4: | |
1860 | return ops->si; | |
1861 | case 8: | |
1862 | return ops->di; | |
1863 | case 16: | |
1864 | return ops->ti; | |
1865 | default: | |
1866 | return NULL; | |
1867 | } | |
1868 | } | |
c8af3574 | 1869 | |
301d03af RS |
1870 | /* Use directive OP to assemble an integer object X. Print OP at the |
1871 | start of the line, followed immediately by the value of X. */ | |
c8af3574 | 1872 | |
301d03af | 1873 | void |
2e1eedd6 | 1874 | assemble_integer_with_op (const char *op, rtx x) |
301d03af RS |
1875 | { |
1876 | fputs (op, asm_out_file); | |
1877 | output_addr_const (asm_out_file, x); | |
1878 | fputc ('\n', asm_out_file); | |
1879 | } | |
79e68feb | 1880 | |
301d03af | 1881 | /* The default implementation of the asm_out.integer target hook. */ |
79e68feb | 1882 | |
301d03af | 1883 | bool |
2e1eedd6 AJ |
1884 | default_assemble_integer (rtx x ATTRIBUTE_UNUSED, |
1885 | unsigned int size ATTRIBUTE_UNUSED, | |
1886 | int aligned_p ATTRIBUTE_UNUSED) | |
301d03af RS |
1887 | { |
1888 | const char *op = integer_asm_op (size, aligned_p); | |
1889 | return op && (assemble_integer_with_op (op, x), true); | |
1890 | } | |
79e68feb | 1891 | |
301d03af RS |
1892 | /* Assemble the integer constant X into an object of SIZE bytes. ALIGN is |
1893 | the alignment of the integer in bits. Return 1 if we were able to output | |
0e9e1e0a | 1894 | the constant, otherwise 0. If FORCE is nonzero, abort if we can't output |
301d03af | 1895 | the constant. */ |
79e68feb | 1896 | |
301d03af | 1897 | bool |
2e1eedd6 | 1898 | assemble_integer (rtx x, unsigned int size, unsigned int align, int force) |
301d03af RS |
1899 | { |
1900 | int aligned_p; | |
79e68feb | 1901 | |
301d03af | 1902 | aligned_p = (align >= MIN (size * BITS_PER_UNIT, BIGGEST_ALIGNMENT)); |
79e68feb | 1903 | |
301d03af | 1904 | /* See if the target hook can handle this kind of object. */ |
5fd9b178 | 1905 | if (targetm.asm_out.integer (x, size, aligned_p)) |
301d03af | 1906 | return true; |
79e68feb | 1907 | |
301d03af RS |
1908 | /* If the object is a multi-byte one, try splitting it up. Split |
1909 | it into words it if is multi-word, otherwise split it into bytes. */ | |
1910 | if (size > 1) | |
c8af3574 RH |
1911 | { |
1912 | enum machine_mode omode, imode; | |
301d03af RS |
1913 | unsigned int subalign; |
1914 | unsigned int subsize, i; | |
46f9491e | 1915 | |
301d03af RS |
1916 | subsize = size > UNITS_PER_WORD? UNITS_PER_WORD : 1; |
1917 | subalign = MIN (align, subsize * BITS_PER_UNIT); | |
1918 | omode = mode_for_size (subsize * BITS_PER_UNIT, MODE_INT, 0); | |
c8af3574 RH |
1919 | imode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0); |
1920 | ||
301d03af | 1921 | for (i = 0; i < size; i += subsize) |
c8af3574 | 1922 | { |
301d03af RS |
1923 | rtx partial = simplify_subreg (omode, x, imode, i); |
1924 | if (!partial || !assemble_integer (partial, subsize, subalign, 0)) | |
c8af3574 RH |
1925 | break; |
1926 | } | |
c8af3574 | 1927 | if (i == size) |
301d03af RS |
1928 | return true; |
1929 | ||
1930 | /* If we've printed some of it, but not all of it, there's no going | |
1931 | back now. */ | |
c8af3574 RH |
1932 | if (i > 0) |
1933 | abort (); | |
1934 | } | |
1935 | ||
79e68feb RS |
1936 | if (force) |
1937 | abort (); | |
1938 | ||
301d03af | 1939 | return false; |
79e68feb RS |
1940 | } |
1941 | \f | |
82af613f | 1942 | void |
2e1eedd6 | 1943 | assemble_real (REAL_VALUE_TYPE d, enum machine_mode mode, unsigned int align) |
94aca342 | 1944 | { |
82af613f | 1945 | long data[4]; |
b409761a ZW |
1946 | int i; |
1947 | int bitsize, nelts, nunits, units_per; | |
1948 | ||
02befdf4 | 1949 | /* This is hairy. We have a quantity of known size. real_to_target |
b409761a ZW |
1950 | will put it into an array of *host* longs, 32 bits per element |
1951 | (even if long is more than 32 bits). We need to determine the | |
1952 | number of array elements that are occupied (nelts) and the number | |
1953 | of *target* min-addressable units that will be occupied in the | |
02befdf4 ZW |
1954 | object file (nunits). We cannot assume that 32 divides the |
1955 | mode's bitsize (size * BITS_PER_UNIT) evenly. | |
1956 | ||
1957 | size * BITS_PER_UNIT is used here to make sure that padding bits | |
1958 | (which might appear at either end of the value; real_to_target | |
1959 | will include the padding bits in its output array) are included. */ | |
1960 | ||
1961 | nunits = GET_MODE_SIZE (mode); | |
1962 | bitsize = nunits * BITS_PER_UNIT; | |
b409761a ZW |
1963 | nelts = CEIL (bitsize, 32); |
1964 | units_per = 32 / BITS_PER_UNIT; | |
1965 | ||
1966 | real_to_target (data, &d, mode); | |
1967 | ||
1968 | /* Put out the first word with the specified alignment. */ | |
1969 | assemble_integer (GEN_INT (data[0]), MIN (nunits, units_per), align, 1); | |
1970 | nunits -= units_per; | |
1971 | ||
1972 | /* Subsequent words need only 32-bit alignment. */ | |
1973 | align = min_align (align, 32); | |
1974 | ||
1975 | for (i = 1; i < nelts; i++) | |
79e68feb | 1976 | { |
b409761a ZW |
1977 | assemble_integer (GEN_INT (data[i]), MIN (nunits, units_per), align, 1); |
1978 | nunits -= units_per; | |
79e68feb | 1979 | } |
94aca342 | 1980 | } |
79e68feb | 1981 | \f |
79e68feb RS |
1982 | /* Given an expression EXP with a constant value, |
1983 | reduce it to the sum of an assembler symbol and an integer. | |
1984 | Store them both in the structure *VALUE. | |
1985 | Abort if EXP does not reduce. */ | |
1986 | ||
e2500fed | 1987 | struct addr_const GTY(()) |
79e68feb RS |
1988 | { |
1989 | rtx base; | |
fb351073 | 1990 | HOST_WIDE_INT offset; |
79e68feb RS |
1991 | }; |
1992 | ||
1993 | static void | |
2e1eedd6 | 1994 | decode_addr_const (tree exp, struct addr_const *value) |
79e68feb | 1995 | { |
b3694847 SS |
1996 | tree target = TREE_OPERAND (exp, 0); |
1997 | int offset = 0; | |
1998 | rtx x; | |
79e68feb RS |
1999 | |
2000 | while (1) | |
2001 | { | |
2002 | if (TREE_CODE (target) == COMPONENT_REF | |
770ae6cc | 2003 | && host_integerp (byte_position (TREE_OPERAND (target, 1)), 0)) |
665f2503 | 2004 | |
79e68feb | 2005 | { |
770ae6cc | 2006 | offset += int_byte_position (TREE_OPERAND (target, 1)); |
79e68feb RS |
2007 | target = TREE_OPERAND (target, 0); |
2008 | } | |
b4e3fabb RK |
2009 | else if (TREE_CODE (target) == ARRAY_REF |
2010 | || TREE_CODE (target) == ARRAY_RANGE_REF) | |
79e68feb | 2011 | { |
770ae6cc RK |
2012 | offset += (tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (target)), 1) |
2013 | * tree_low_cst (TREE_OPERAND (target, 1), 0)); | |
79e68feb RS |
2014 | target = TREE_OPERAND (target, 0); |
2015 | } | |
2016 | else | |
2017 | break; | |
2018 | } | |
2019 | ||
2020 | switch (TREE_CODE (target)) | |
2021 | { | |
2022 | case VAR_DECL: | |
2023 | case FUNCTION_DECL: | |
2024 | x = DECL_RTL (target); | |
2025 | break; | |
2026 | ||
2027 | case LABEL_DECL: | |
b93a436e | 2028 | x = gen_rtx_MEM (FUNCTION_MODE, |
046e4e36 | 2029 | gen_rtx_LABEL_REF (VOIDmode, force_label_rtx (target))); |
79e68feb RS |
2030 | break; |
2031 | ||
2032 | case REAL_CST: | |
2033 | case STRING_CST: | |
2034 | case COMPLEX_CST: | |
2035 | case CONSTRUCTOR: | |
2cf55b55 | 2036 | case INTEGER_CST: |
44e3910a | 2037 | x = output_constant_def (target, 1); |
79e68feb RS |
2038 | break; |
2039 | ||
2040 | default: | |
2041 | abort (); | |
2042 | } | |
2043 | ||
3c0cb5de | 2044 | if (!MEM_P (x)) |
b93a436e JL |
2045 | abort (); |
2046 | x = XEXP (x, 0); | |
79e68feb RS |
2047 | |
2048 | value->base = x; | |
2049 | value->offset = offset; | |
2050 | } | |
2051 | \f | |
2052 | /* Uniquize all constants that appear in memory. | |
2053 | Each constant in memory thus far output is recorded | |
5e9295fa | 2054 | in `const_desc_table'. */ |
79e68feb | 2055 | |
e2500fed | 2056 | struct constant_descriptor_tree GTY(()) |
79e68feb | 2057 | { |
e2500fed | 2058 | /* A MEM for the constant. */ |
14a774a9 | 2059 | rtx rtl; |
e2500fed GK |
2060 | |
2061 | /* The value of the constant. */ | |
2062 | tree value; | |
79e68feb RS |
2063 | }; |
2064 | ||
10b6a274 ZW |
2065 | static GTY((param_is (struct constant_descriptor_tree))) |
2066 | htab_t const_desc_htab; | |
79e68feb | 2067 | |
2e1eedd6 AJ |
2068 | static struct constant_descriptor_tree * build_constant_desc (tree); |
2069 | static void maybe_output_constant_def_contents (struct constant_descriptor_tree *, int); | |
bd7cf17e | 2070 | |
79e68feb RS |
2071 | /* Compute a hash code for a constant expression. */ |
2072 | ||
10b6a274 | 2073 | static hashval_t |
2e1eedd6 | 2074 | const_desc_hash (const void *ptr) |
46b33600 | 2075 | { |
10b6a274 | 2076 | return const_hash_1 (((struct constant_descriptor_tree *)ptr)->value); |
46b33600 RH |
2077 | } |
2078 | ||
10b6a274 | 2079 | static hashval_t |
2e1eedd6 | 2080 | const_hash_1 (const tree exp) |
79e68feb | 2081 | { |
b3694847 | 2082 | const char *p; |
10b6a274 | 2083 | hashval_t hi; |
46b33600 | 2084 | int len, i; |
b3694847 | 2085 | enum tree_code code = TREE_CODE (exp); |
79e68feb | 2086 | |
a9d07d6e RK |
2087 | /* Either set P and LEN to the address and len of something to hash and |
2088 | exit the switch or return a value. */ | |
2089 | ||
2090 | switch (code) | |
79e68feb | 2091 | { |
a9d07d6e | 2092 | case INTEGER_CST: |
2afaa41c GM |
2093 | p = (char *) &TREE_INT_CST (exp); |
2094 | len = sizeof TREE_INT_CST (exp); | |
a9d07d6e RK |
2095 | break; |
2096 | ||
2097 | case REAL_CST: | |
46b33600 | 2098 | return real_hash (TREE_REAL_CST_PTR (exp)); |
79e68feb | 2099 | |
a9d07d6e | 2100 | case STRING_CST: |
3521b33c ZW |
2101 | p = TREE_STRING_POINTER (exp); |
2102 | len = TREE_STRING_LENGTH (exp); | |
a9d07d6e | 2103 | break; |
5e9295fa | 2104 | |
a9d07d6e | 2105 | case COMPLEX_CST: |
46b33600 RH |
2106 | return (const_hash_1 (TREE_REALPART (exp)) * 5 |
2107 | + const_hash_1 (TREE_IMAGPART (exp))); | |
a9d07d6e RK |
2108 | |
2109 | case CONSTRUCTOR: | |
2110 | if (TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) | |
79e68feb | 2111 | { |
3cce094d KG |
2112 | char *tmp; |
2113 | ||
a9d07d6e | 2114 | len = int_size_in_bytes (TREE_TYPE (exp)); |
703ad42b | 2115 | tmp = alloca (len); |
3cce094d KG |
2116 | get_set_constructor_bytes (exp, (unsigned char *) tmp, len); |
2117 | p = tmp; | |
a9d07d6e RK |
2118 | break; |
2119 | } | |
2120 | else | |
2121 | { | |
b3694847 | 2122 | tree link; |
a9d07d6e | 2123 | |
46b33600 | 2124 | hi = 5 + int_size_in_bytes (TREE_TYPE (exp)); |
a9d07d6e RK |
2125 | |
2126 | for (link = CONSTRUCTOR_ELTS (exp); link; link = TREE_CHAIN (link)) | |
2127 | if (TREE_VALUE (link)) | |
46b33600 | 2128 | hi = hi * 603 + const_hash_1 (TREE_VALUE (link)); |
a9d07d6e RK |
2129 | |
2130 | return hi; | |
79e68feb | 2131 | } |
79e68feb | 2132 | |
a9d07d6e | 2133 | case ADDR_EXPR: |
5d056e9b | 2134 | case FDESC_EXPR: |
a9d07d6e RK |
2135 | { |
2136 | struct addr_const value; | |
2137 | ||
2138 | decode_addr_const (exp, &value); | |
2139 | if (GET_CODE (value.base) == SYMBOL_REF) | |
2140 | { | |
2141 | /* Don't hash the address of the SYMBOL_REF; | |
2142 | only use the offset and the symbol name. */ | |
2143 | hi = value.offset; | |
2144 | p = XSTR (value.base, 0); | |
2145 | for (i = 0; p[i] != 0; i++) | |
2146 | hi = ((hi * 613) + (unsigned) (p[i])); | |
2147 | } | |
2148 | else if (GET_CODE (value.base) == LABEL_REF) | |
2149 | hi = value.offset + CODE_LABEL_NUMBER (XEXP (value.base, 0)) * 13; | |
6a651371 | 2150 | else |
c203e7fe | 2151 | abort (); |
a9d07d6e | 2152 | } |
79e68feb | 2153 | return hi; |
a9d07d6e RK |
2154 | |
2155 | case PLUS_EXPR: | |
2156 | case MINUS_EXPR: | |
46b33600 RH |
2157 | return (const_hash_1 (TREE_OPERAND (exp, 0)) * 9 |
2158 | + const_hash_1 (TREE_OPERAND (exp, 1))); | |
a9d07d6e RK |
2159 | |
2160 | case NOP_EXPR: | |
2161 | case CONVERT_EXPR: | |
2162 | case NON_LVALUE_EXPR: | |
46b33600 | 2163 | return const_hash_1 (TREE_OPERAND (exp, 0)) * 7 + 2; |
46f9491e | 2164 | |
e9a25f70 | 2165 | default: |
2d76cb1a | 2166 | /* A language specific constant. Just hash the code. */ |
46b33600 | 2167 | return code; |
79e68feb | 2168 | } |
79e68feb | 2169 | |
f9da5064 | 2170 | /* Compute hashing function. */ |
79e68feb RS |
2171 | hi = len; |
2172 | for (i = 0; i < len; i++) | |
0f41302f | 2173 | hi = ((hi * 613) + (unsigned) (p[i])); |
79e68feb | 2174 | |
79e68feb RS |
2175 | return hi; |
2176 | } | |
79e68feb | 2177 | |
10b6a274 ZW |
2178 | /* Wrapper of compare_constant, for the htab interface. */ |
2179 | static int | |
2e1eedd6 | 2180 | const_desc_eq (const void *p1, const void *p2) |
10b6a274 ZW |
2181 | { |
2182 | return compare_constant (((struct constant_descriptor_tree *)p1)->value, | |
2183 | ((struct constant_descriptor_tree *)p2)->value); | |
2184 | } | |
2185 | ||
e2500fed GK |
2186 | /* Compare t1 and t2, and return 1 only if they are known to result in |
2187 | the same bit pattern on output. */ | |
79e68feb | 2188 | |
e2500fed | 2189 | static int |
2e1eedd6 | 2190 | compare_constant (const tree t1, const tree t2) |
79e68feb | 2191 | { |
e2500fed | 2192 | enum tree_code typecode; |
79e68feb | 2193 | |
e2500fed GK |
2194 | if (t1 == NULL_TREE) |
2195 | return t2 == NULL_TREE; | |
2196 | if (t2 == NULL_TREE) | |
79e68feb RS |
2197 | return 0; |
2198 | ||
e2500fed GK |
2199 | if (TREE_CODE (t1) != TREE_CODE (t2)) |
2200 | return 0; | |
a9d07d6e | 2201 | |
e2500fed | 2202 | switch (TREE_CODE (t1)) |
79e68feb | 2203 | { |
a9d07d6e | 2204 | case INTEGER_CST: |
79e68feb | 2205 | /* Integer constants are the same only if the same width of type. */ |
e2500fed | 2206 | if (TYPE_PRECISION (TREE_TYPE (t1)) != TYPE_PRECISION (TREE_TYPE (t2))) |
79e68feb | 2207 | return 0; |
e2500fed | 2208 | return tree_int_cst_equal (t1, t2); |
a9d07d6e RK |
2209 | |
2210 | case REAL_CST: | |
79e68feb | 2211 | /* Real constants are the same only if the same width of type. */ |
e2500fed | 2212 | if (TYPE_PRECISION (TREE_TYPE (t1)) != TYPE_PRECISION (TREE_TYPE (t2))) |
79e68feb | 2213 | return 0; |
a9d07d6e | 2214 | |
e2500fed | 2215 | return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1), TREE_REAL_CST (t2)); |
a9d07d6e RK |
2216 | |
2217 | case STRING_CST: | |
e2500fed | 2218 | if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2))) |
79e68feb | 2219 | return 0; |
a9d07d6e | 2220 | |
e2500fed GK |
2221 | return (TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2) |
2222 | && ! memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2), | |
2223 | TREE_STRING_LENGTH (t1))); | |
79e68feb | 2224 | |
a9d07d6e | 2225 | case COMPLEX_CST: |
e2500fed GK |
2226 | return (compare_constant (TREE_REALPART (t1), TREE_REALPART (t2)) |
2227 | && compare_constant (TREE_IMAGPART (t1), TREE_IMAGPART (t2))); | |
79e68feb | 2228 | |
a9d07d6e | 2229 | case CONSTRUCTOR: |
e2500fed GK |
2230 | typecode = TREE_CODE (TREE_TYPE (t1)); |
2231 | if (typecode != TREE_CODE (TREE_TYPE (t2))) | |
2232 | return 0; | |
eb528802 | 2233 | |
e2500fed | 2234 | if (typecode == SET_TYPE) |
77fa0940 | 2235 | { |
e2500fed GK |
2236 | int len = int_size_in_bytes (TREE_TYPE (t2)); |
2237 | unsigned char *tmp1, *tmp2; | |
a9d07d6e | 2238 | |
e2500fed | 2239 | if (int_size_in_bytes (TREE_TYPE (t1)) != len) |
a9d07d6e RK |
2240 | return 0; |
2241 | ||
703ad42b KG |
2242 | tmp1 = alloca (len); |
2243 | tmp2 = alloca (len); | |
a9d07d6e | 2244 | |
e2500fed GK |
2245 | if (get_set_constructor_bytes (t1, tmp1, len) != NULL_TREE) |
2246 | return 0; | |
2247 | if (get_set_constructor_bytes (t2, tmp2, len) != NULL_TREE) | |
a9d07d6e | 2248 | return 0; |
b2e2d0cc | 2249 | |
eae216e8 | 2250 | return memcmp (tmp1, tmp2, len) == 0; |
e2500fed GK |
2251 | } |
2252 | else | |
2253 | { | |
2254 | tree l1, l2; | |
a9d07d6e | 2255 | |
e2500fed | 2256 | if (typecode == ARRAY_TYPE) |
14a774a9 | 2257 | { |
e2500fed GK |
2258 | HOST_WIDE_INT size_1 = int_size_in_bytes (TREE_TYPE (t1)); |
2259 | /* For arrays, check that the sizes all match. */ | |
2260 | if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2)) | |
2261 | || size_1 == -1 | |
2262 | || size_1 != int_size_in_bytes (TREE_TYPE (t2))) | |
14a774a9 | 2263 | return 0; |
14a774a9 | 2264 | } |
e2500fed | 2265 | else |
77fa0940 | 2266 | { |
e2500fed GK |
2267 | /* For record and union constructors, require exact type |
2268 | equality. */ | |
2269 | if (TREE_TYPE (t1) != TREE_TYPE (t2)) | |
77fa0940 RK |
2270 | return 0; |
2271 | } | |
a9d07d6e | 2272 | |
e2500fed GK |
2273 | for (l1 = CONSTRUCTOR_ELTS (t1), l2 = CONSTRUCTOR_ELTS (t2); |
2274 | l1 && l2; | |
2275 | l1 = TREE_CHAIN (l1), l2 = TREE_CHAIN (l2)) | |
77fa0940 | 2276 | { |
4b7e68e7 | 2277 | /* Check that each value is the same... */ |
e2500fed GK |
2278 | if (! compare_constant (TREE_VALUE (l1), TREE_VALUE (l2))) |
2279 | return 0; | |
2280 | /* ... and that they apply to the same fields! */ | |
2281 | if (typecode == ARRAY_TYPE) | |
a9d07d6e | 2282 | { |
e2500fed GK |
2283 | if (! compare_constant (TREE_PURPOSE (l1), |
2284 | TREE_PURPOSE (l2))) | |
a9d07d6e RK |
2285 | return 0; |
2286 | } | |
2287 | else | |
2288 | { | |
e2500fed | 2289 | if (TREE_PURPOSE (l1) != TREE_PURPOSE (l2)) |
e5e809f4 | 2290 | return 0; |
a9d07d6e | 2291 | } |
77fa0940 | 2292 | } |
b2e2d0cc | 2293 | |
e2500fed | 2294 | return l1 == NULL_TREE && l2 == NULL_TREE; |
77fa0940 RK |
2295 | } |
2296 | ||
a9d07d6e | 2297 | case ADDR_EXPR: |
5d056e9b | 2298 | case FDESC_EXPR: |
a9d07d6e | 2299 | { |
e2500fed | 2300 | struct addr_const value1, value2; |
a9d07d6e | 2301 | |
e2500fed GK |
2302 | decode_addr_const (t1, &value1); |
2303 | decode_addr_const (t2, &value2); | |
2304 | return (value1.offset == value2.offset | |
2305 | && strcmp (XSTR (value1.base, 0), XSTR (value2.base, 0)) == 0); | |
a9d07d6e | 2306 | } |
a9d07d6e RK |
2307 | |
2308 | case PLUS_EXPR: | |
2309 | case MINUS_EXPR: | |
fa212801 | 2310 | case RANGE_EXPR: |
e2500fed GK |
2311 | return (compare_constant (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)) |
2312 | && compare_constant(TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1))); | |
a9d07d6e RK |
2313 | |
2314 | case NOP_EXPR: | |
2315 | case CONVERT_EXPR: | |
2316 | case NON_LVALUE_EXPR: | |
a3d71605 | 2317 | case VIEW_CONVERT_EXPR: |
e2500fed | 2318 | return compare_constant (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); |
e9a25f70 JL |
2319 | |
2320 | default: | |
ac79cd5a | 2321 | { |
e2500fed | 2322 | tree nt1, nt2; |
ae2bcd98 RS |
2323 | nt1 = lang_hooks.expand_constant (t1); |
2324 | nt2 = lang_hooks.expand_constant (t2); | |
e2500fed GK |
2325 | if (nt1 != t1 || nt2 != t2) |
2326 | return compare_constant (nt1, nt2); | |
ac79cd5a RK |
2327 | else |
2328 | return 0; | |
2329 | } | |
79e68feb RS |
2330 | } |
2331 | ||
e2500fed GK |
2332 | /* Should not get here. */ |
2333 | abort (); | |
79e68feb RS |
2334 | } |
2335 | \f | |
e2500fed GK |
2336 | /* Make a copy of the whole tree structure for a constant. This |
2337 | handles the same types of nodes that compare_constant handles. */ | |
d12516f1 RS |
2338 | |
2339 | static tree | |
2e1eedd6 | 2340 | copy_constant (tree exp) |
d12516f1 RS |
2341 | { |
2342 | switch (TREE_CODE (exp)) | |
2343 | { | |
310bbbf4 JW |
2344 | case ADDR_EXPR: |
2345 | /* For ADDR_EXPR, we do not want to copy the decl whose address | |
2346 | is requested. We do want to copy constants though. */ | |
2347 | if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (exp, 0))) == 'c') | |
2348 | return build1 (TREE_CODE (exp), TREE_TYPE (exp), | |
2349 | copy_constant (TREE_OPERAND (exp, 0))); | |
2350 | else | |
2351 | return copy_node (exp); | |
2352 | ||
d12516f1 RS |
2353 | case INTEGER_CST: |
2354 | case REAL_CST: | |
2355 | case STRING_CST: | |
d12516f1 RS |
2356 | return copy_node (exp); |
2357 | ||
2358 | case COMPLEX_CST: | |
28eb1cb8 RK |
2359 | return build_complex (TREE_TYPE (exp), |
2360 | copy_constant (TREE_REALPART (exp)), | |
d12516f1 RS |
2361 | copy_constant (TREE_IMAGPART (exp))); |
2362 | ||
2363 | case PLUS_EXPR: | |
2364 | case MINUS_EXPR: | |
2365 | return build (TREE_CODE (exp), TREE_TYPE (exp), | |
2366 | copy_constant (TREE_OPERAND (exp, 0)), | |
2367 | copy_constant (TREE_OPERAND (exp, 1))); | |
2368 | ||
2369 | case NOP_EXPR: | |
2370 | case CONVERT_EXPR: | |
a9d07d6e | 2371 | case NON_LVALUE_EXPR: |
a71c8ddc | 2372 | case VIEW_CONVERT_EXPR: |
d12516f1 RS |
2373 | return build1 (TREE_CODE (exp), TREE_TYPE (exp), |
2374 | copy_constant (TREE_OPERAND (exp, 0))); | |
2375 | ||
2376 | case CONSTRUCTOR: | |
2377 | { | |
2378 | tree copy = copy_node (exp); | |
2379 | tree list = copy_list (CONSTRUCTOR_ELTS (exp)); | |
2380 | tree tail; | |
2381 | ||
bb31ce0a | 2382 | CONSTRUCTOR_ELTS (copy) = list; |
d12516f1 RS |
2383 | for (tail = list; tail; tail = TREE_CHAIN (tail)) |
2384 | TREE_VALUE (tail) = copy_constant (TREE_VALUE (tail)); | |
474bda6c PB |
2385 | if (TREE_CODE (TREE_TYPE (exp)) == SET_TYPE) |
2386 | for (tail = list; tail; tail = TREE_CHAIN (tail)) | |
2387 | TREE_PURPOSE (tail) = copy_constant (TREE_PURPOSE (tail)); | |
d12516f1 RS |
2388 | |
2389 | return copy; | |
2390 | } | |
2391 | ||
2392 | default: | |
e2500fed GK |
2393 | { |
2394 | tree t; | |
ae2bcd98 | 2395 | t = lang_hooks.expand_constant (exp); |
e2500fed GK |
2396 | if (t != exp) |
2397 | return copy_constant (t); | |
2398 | else | |
2399 | abort (); | |
2400 | } | |
d12516f1 RS |
2401 | } |
2402 | } | |
ff8f4401 | 2403 | \f |
293107d1 ZW |
2404 | /* Subroutine of output_constant_def: |
2405 | No constant equal to EXP is known to have been output. | |
2406 | Make a constant descriptor to enter EXP in the hash table. | |
2407 | Assign the label number and construct RTL to refer to the | |
2408 | constant's location in memory. | |
2409 | Caller is responsible for updating the hash table. */ | |
2410 | ||
2411 | static struct constant_descriptor_tree * | |
2e1eedd6 | 2412 | build_constant_desc (tree exp) |
293107d1 ZW |
2413 | { |
2414 | rtx symbol; | |
2415 | rtx rtl; | |
2416 | char label[256]; | |
2417 | int labelno; | |
2418 | struct constant_descriptor_tree *desc; | |
2419 | ||
2420 | desc = ggc_alloc (sizeof (*desc)); | |
3521b33c | 2421 | desc->value = copy_constant (exp); |
293107d1 | 2422 | |
9cf737f8 | 2423 | /* Propagate marked-ness to copied constant. */ |
6de9cd9a DN |
2424 | if (flag_mudflap && mf_marked_p (exp)) |
2425 | mf_mark (desc->value); | |
2426 | ||
293107d1 ZW |
2427 | /* Create a string containing the label name, in LABEL. */ |
2428 | labelno = const_labelno++; | |
2429 | ASM_GENERATE_INTERNAL_LABEL (label, "LC", labelno); | |
2430 | ||
2431 | /* We have a symbol name; construct the SYMBOL_REF and the MEM. */ | |
2432 | symbol = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label)); | |
2433 | SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_LOCAL; | |
2adb9af1 RH |
2434 | SYMBOL_REF_DECL (symbol) = desc->value; |
2435 | TREE_CONSTANT_POOL_ADDRESS_P (symbol) = 1; | |
293107d1 ZW |
2436 | |
2437 | rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (exp)), symbol); | |
2438 | set_mem_attributes (rtl, exp, 1); | |
2439 | set_mem_alias_set (rtl, 0); | |
2440 | set_mem_alias_set (rtl, const_alias_set); | |
2441 | ||
2442 | /* Set flags or add text to the name to record information, such as | |
2443 | that it is a local symbol. If the name is changed, the macro | |
2444 | ASM_OUTPUT_LABELREF will have to know how to strip this | |
10b6a274 ZW |
2445 | information. This call might invalidate our local variable |
2446 | SYMBOL; we can't use it afterward. */ | |
2447 | ||
5fd9b178 | 2448 | targetm.encode_section_info (exp, rtl, true); |
293107d1 ZW |
2449 | |
2450 | desc->rtl = rtl; | |
293107d1 ZW |
2451 | |
2452 | return desc; | |
2453 | } | |
2454 | ||
79e68feb RS |
2455 | /* Return an rtx representing a reference to constant data in memory |
2456 | for the constant expression EXP. | |
ff8f4401 | 2457 | |
79e68feb RS |
2458 | If assembler code for such a constant has already been output, |
2459 | return an rtx to refer to it. | |
b20cbca2 | 2460 | Otherwise, output such a constant in memory |
ff8f4401 RS |
2461 | and generate an rtx for it. |
2462 | ||
10b6a274 ZW |
2463 | If DEFER is nonzero, this constant can be deferred and output only |
2464 | if referenced in the function after all optimizations. | |
bd7cf17e | 2465 | |
5e9295fa | 2466 | `const_desc_table' records which constants already have label strings. */ |
79e68feb RS |
2467 | |
2468 | rtx | |
2e1eedd6 | 2469 | output_constant_def (tree exp, int defer) |
79e68feb | 2470 | { |
e2500fed | 2471 | struct constant_descriptor_tree *desc; |
10b6a274 ZW |
2472 | struct constant_descriptor_tree key; |
2473 | void **loc; | |
79e68feb | 2474 | |
10b6a274 ZW |
2475 | /* Look up EXP in the table of constant descriptors. If we didn't find |
2476 | it, create a new one. */ | |
2477 | key.value = exp; | |
2478 | loc = htab_find_slot (const_desc_htab, &key, INSERT); | |
46f9491e | 2479 | |
10b6a274 | 2480 | desc = *loc; |
14a774a9 | 2481 | if (desc == 0) |
00f07fb9 | 2482 | { |
293107d1 | 2483 | desc = build_constant_desc (exp); |
10b6a274 | 2484 | *loc = desc; |
14a774a9 RK |
2485 | } |
2486 | ||
10b6a274 | 2487 | maybe_output_constant_def_contents (desc, defer); |
293107d1 ZW |
2488 | return desc->rtl; |
2489 | } | |
79e68feb | 2490 | |
10b6a274 ZW |
2491 | /* Subroutine of output_constant_def: Decide whether or not we need to |
2492 | output the constant DESC now, and if so, do it. */ | |
293107d1 | 2493 | static void |
2e1eedd6 AJ |
2494 | maybe_output_constant_def_contents (struct constant_descriptor_tree *desc, |
2495 | int defer) | |
293107d1 | 2496 | { |
10b6a274 | 2497 | rtx symbol = XEXP (desc->rtl, 0); |
2adb9af1 | 2498 | tree exp = desc->value; |
10b6a274 | 2499 | |
293107d1 ZW |
2500 | if (flag_syntax_only) |
2501 | return; | |
79e68feb | 2502 | |
2adb9af1 | 2503 | if (TREE_ASM_WRITTEN (exp)) |
10b6a274 ZW |
2504 | /* Already output; don't do it again. */ |
2505 | return; | |
2506 | ||
3521b33c ZW |
2507 | /* We can always defer constants as long as the context allows |
2508 | doing so. */ | |
2509 | if (defer) | |
bd7cf17e | 2510 | { |
2adb9af1 RH |
2511 | /* Increment n_deferred_constants if it exists. It needs to be at |
2512 | least as large as the number of constants actually referred to | |
2513 | by the function. If it's too small we'll stop looking too early | |
2514 | and fail to emit constants; if it's too large we'll only look | |
2515 | through the entire function when we could have stopped earlier. */ | |
10b6a274 ZW |
2516 | if (cfun) |
2517 | n_deferred_constants++; | |
32a61907 | 2518 | return; |
ff8f4401 RS |
2519 | } |
2520 | ||
10b6a274 | 2521 | output_constant_def_contents (symbol); |
ff8f4401 RS |
2522 | } |
2523 | ||
10b6a274 | 2524 | /* We must output the constant data referred to by SYMBOL; do so. */ |
79e68feb | 2525 | |
ff8f4401 | 2526 | static void |
2e1eedd6 | 2527 | output_constant_def_contents (rtx symbol) |
ff8f4401 | 2528 | { |
10b6a274 ZW |
2529 | tree exp = SYMBOL_REF_DECL (symbol); |
2530 | const char *label = XSTR (symbol, 0); | |
18f3e349 | 2531 | HOST_WIDE_INT size; |
10b6a274 | 2532 | |
293107d1 ZW |
2533 | /* Make sure any other constants whose addresses appear in EXP |
2534 | are assigned label numbers. */ | |
b2218cc1 | 2535 | int reloc = compute_reloc_for_constant (exp); |
ff8f4401 | 2536 | |
201556f0 | 2537 | /* Align the location counter as required by EXP's data type. */ |
293107d1 | 2538 | int align = TYPE_ALIGN (TREE_TYPE (exp)); |
201556f0 JJ |
2539 | #ifdef CONSTANT_ALIGNMENT |
2540 | align = CONSTANT_ALIGNMENT (exp, align); | |
2541 | #endif | |
2542 | ||
b2218cc1 AO |
2543 | output_addressed_constants (exp); |
2544 | ||
10b6a274 | 2545 | /* We are no longer deferring this constant. */ |
2adb9af1 | 2546 | TREE_ASM_WRITTEN (exp) = 1; |
10b6a274 | 2547 | |
8a425a05 | 2548 | if (IN_NAMED_SECTION (exp)) |
ad4ff310 | 2549 | named_section (exp, NULL, reloc); |
8a425a05 | 2550 | else |
5fd9b178 | 2551 | targetm.asm_out.select_section (exp, reloc, align); |
79e68feb | 2552 | |
ff8f4401 | 2553 | if (align > BITS_PER_UNIT) |
91ea4f8d KG |
2554 | { |
2555 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT)); | |
2556 | } | |
79e68feb | 2557 | |
18f3e349 GK |
2558 | size = int_size_in_bytes (TREE_TYPE (exp)); |
2559 | if (TREE_CODE (exp) == STRING_CST) | |
2560 | size = MAX (TREE_STRING_LENGTH (exp), size); | |
2561 | ||
2562 | /* Do any machine/system dependent processing of the constant. */ | |
2563 | #ifdef ASM_DECLARE_CONSTANT_NAME | |
2564 | ASM_DECLARE_CONSTANT_NAME (asm_out_file, label, exp, size); | |
2565 | #else | |
2566 | /* Standard thing is just output label for the constant. */ | |
293107d1 | 2567 | ASM_OUTPUT_LABEL (asm_out_file, label); |
18f3e349 | 2568 | #endif /* ASM_DECLARE_CONSTANT_NAME */ |
79e68feb | 2569 | |
ff8f4401 | 2570 | /* Output the value of EXP. */ |
18f3e349 | 2571 | output_constant (exp, size, align); |
6de9cd9a DN |
2572 | if (flag_mudflap) |
2573 | mudflap_enqueue_constant (exp); | |
a2a6a79b | 2574 | } |
75c20980 RH |
2575 | |
2576 | /* Look up EXP in the table of constant descriptors. Return the rtl | |
2577 | if it has been emitted, else null. */ | |
2578 | ||
2579 | rtx | |
2580 | lookup_constant_def (tree exp) | |
2581 | { | |
2582 | struct constant_descriptor_tree *desc; | |
2583 | struct constant_descriptor_tree key; | |
2584 | ||
2585 | key.value = exp; | |
2586 | desc = htab_find (const_desc_htab, &key); | |
2587 | ||
2588 | return (desc ? desc->rtl : NULL_RTX); | |
2589 | } | |
79e68feb | 2590 | \f |
e2500fed GK |
2591 | /* Used in the hash tables to avoid outputting the same constant |
2592 | twice. Unlike 'struct constant_descriptor_tree', RTX constants | |
3234b52d RH |
2593 | are output once per function, not once per file. */ |
2594 | /* ??? Only a few targets need per-function constant pools. Most | |
2595 | can use one per-file pool. Should add a targetm bit to tell the | |
2596 | difference. */ | |
2597 | ||
2598 | struct rtx_constant_pool GTY(()) | |
2599 | { | |
2600 | /* Pointers to first and last constant in pool, as ordered by offset. */ | |
2601 | struct constant_descriptor_rtx *first; | |
2602 | struct constant_descriptor_rtx *last; | |
2603 | ||
2604 | /* Hash facility for making memory-constants from constant rtl-expressions. | |
2605 | It is used on RISC machines where immediate integer arguments and | |
2606 | constant addresses are restricted so that such constants must be stored | |
2607 | in memory. */ | |
2608 | htab_t GTY((param_is (struct constant_descriptor_rtx))) const_rtx_htab; | |
2609 | htab_t GTY((param_is (struct constant_descriptor_rtx))) const_rtx_sym_htab; | |
2610 | ||
2611 | /* Current offset in constant pool (does not include any | |
2612 | machine-specific header). */ | |
2613 | HOST_WIDE_INT offset; | |
e2500fed GK |
2614 | }; |
2615 | ||
3234b52d | 2616 | struct constant_descriptor_rtx GTY((chain_next ("%h.next"))) |
79e68feb | 2617 | { |
3234b52d RH |
2618 | struct constant_descriptor_rtx *next; |
2619 | rtx mem; | |
2620 | rtx sym; | |
79e68feb | 2621 | rtx constant; |
3234b52d RH |
2622 | HOST_WIDE_INT offset; |
2623 | hashval_t hash; | |
94b01be3 | 2624 | enum machine_mode mode; |
a79e3a45 | 2625 | unsigned int align; |
3234b52d | 2626 | int labelno; |
91674c37 | 2627 | int mark; |
79e68feb RS |
2628 | }; |
2629 | ||
3234b52d | 2630 | /* Hash and compare functions for const_rtx_htab. */ |
79e68feb | 2631 | |
3234b52d RH |
2632 | static hashval_t |
2633 | const_desc_rtx_hash (const void *ptr) | |
2634 | { | |
2635 | const struct constant_descriptor_rtx *desc = ptr; | |
2636 | return desc->hash; | |
2637 | } | |
79e68feb | 2638 | |
3234b52d RH |
2639 | static int |
2640 | const_desc_rtx_eq (const void *a, const void *b) | |
79e68feb | 2641 | { |
3234b52d RH |
2642 | const struct constant_descriptor_rtx *x = a; |
2643 | const struct constant_descriptor_rtx *y = b; | |
2644 | ||
2645 | if (x->mode != y->mode) | |
2646 | return 0; | |
2647 | return rtx_equal_p (x->constant, y->constant); | |
57632c51 | 2648 | } |
79e68feb | 2649 | |
3234b52d | 2650 | /* Hash and compare functions for const_rtx_sym_htab. */ |
79e68feb | 2651 | |
3234b52d RH |
2652 | static hashval_t |
2653 | const_desc_rtx_sym_hash (const void *ptr) | |
79e68feb | 2654 | { |
3234b52d RH |
2655 | const struct constant_descriptor_rtx *desc = ptr; |
2656 | return htab_hash_string (XSTR (desc->sym, 0)); | |
2657 | } | |
79e68feb | 2658 | |
3234b52d RH |
2659 | static int |
2660 | const_desc_rtx_sym_eq (const void *a, const void *b) | |
2661 | { | |
2662 | const struct constant_descriptor_rtx *x = a; | |
2663 | const struct constant_descriptor_rtx *y = b; | |
a8c0bbc7 | 2664 | return XSTR (x->sym, 0) == XSTR (y->sym, 0); |
3234b52d | 2665 | } |
79e68feb | 2666 | |
3234b52d | 2667 | /* This is the worker function for const_rtx_hash, called via for_each_rtx. */ |
46b33600 | 2668 | |
3234b52d RH |
2669 | static int |
2670 | const_rtx_hash_1 (rtx *xp, void *data) | |
2671 | { | |
2672 | unsigned HOST_WIDE_INT hwi; | |
2673 | enum machine_mode mode; | |
2674 | enum rtx_code code; | |
2675 | hashval_t h, *hp; | |
2676 | rtx x; | |
46b33600 | 2677 | |
3234b52d RH |
2678 | x = *xp; |
2679 | code = GET_CODE (x); | |
2680 | mode = GET_MODE (x); | |
2681 | h = (hashval_t) code * 1048573 + mode; | |
79e68feb | 2682 | |
3234b52d RH |
2683 | switch (code) |
2684 | { | |
2685 | case CONST_INT: | |
2686 | hwi = INTVAL (x); | |
2687 | fold_hwi: | |
69ef87e2 | 2688 | { |
3234b52d RH |
2689 | const int shift = sizeof (hashval_t) * CHAR_BIT; |
2690 | const int n = sizeof (HOST_WIDE_INT) / sizeof (hashval_t); | |
2691 | int i; | |
69ef87e2 | 2692 | |
3234b52d RH |
2693 | h ^= (hashval_t) hwi; |
2694 | for (i = 1; i < n; ++i) | |
46b33600 | 2695 | { |
3234b52d RH |
2696 | hwi >>= shift; |
2697 | h ^= (hashval_t) hwi; | |
69ef87e2 AH |
2698 | } |
2699 | } | |
2700 | break; | |
2701 | ||
3234b52d RH |
2702 | case CONST_DOUBLE: |
2703 | if (mode == VOIDmode) | |
2704 | { | |
2705 | hwi = CONST_DOUBLE_LOW (x) ^ CONST_DOUBLE_HIGH (x); | |
2706 | goto fold_hwi; | |
2707 | } | |
2708 | else | |
2709 | h ^= real_hash (CONST_DOUBLE_REAL_VALUE (x)); | |
79e68feb RS |
2710 | break; |
2711 | ||
2712 | case SYMBOL_REF: | |
3234b52d RH |
2713 | h ^= htab_hash_string (XSTR (x, 0)); |
2714 | break; | |
2715 | ||
79e68feb | 2716 | case LABEL_REF: |
3234b52d | 2717 | h = h * 251 + CODE_LABEL_NUMBER (XEXP (x, 0)); |
79e68feb RS |
2718 | break; |
2719 | ||
3234b52d RH |
2720 | case UNSPEC: |
2721 | case UNSPEC_VOLATILE: | |
2722 | h = h * 251 + XINT (x, 1); | |
79e68feb RS |
2723 | break; |
2724 | ||
2725 | default: | |
fdf473ae | 2726 | break; |
79e68feb RS |
2727 | } |
2728 | ||
3234b52d RH |
2729 | hp = data; |
2730 | *hp = *hp * 509 + h; | |
2731 | return 0; | |
79e68feb RS |
2732 | } |
2733 | ||
3234b52d | 2734 | /* Compute a hash value for X, which should be a constant. */ |
57632c51 | 2735 | |
3234b52d RH |
2736 | static hashval_t |
2737 | const_rtx_hash (rtx x) | |
57632c51 | 2738 | { |
3234b52d RH |
2739 | hashval_t h = 0; |
2740 | for_each_rtx (&x, const_rtx_hash_1, &h); | |
2741 | return h; | |
57632c51 RS |
2742 | } |
2743 | ||
3234b52d RH |
2744 | \f |
2745 | /* Initialize constant pool hashing for a new function. */ | |
79e68feb | 2746 | |
3234b52d RH |
2747 | void |
2748 | init_varasm_status (struct function *f) | |
79e68feb | 2749 | { |
3234b52d RH |
2750 | struct varasm_status *p; |
2751 | struct rtx_constant_pool *pool; | |
79e68feb | 2752 | |
3234b52d RH |
2753 | p = ggc_alloc (sizeof (struct varasm_status)); |
2754 | f->varasm = p; | |
79e68feb | 2755 | |
3234b52d RH |
2756 | pool = ggc_alloc (sizeof (struct rtx_constant_pool)); |
2757 | p->pool = pool; | |
2758 | p->deferred_constants = 0; | |
79e68feb | 2759 | |
3234b52d RH |
2760 | pool->const_rtx_htab = htab_create_ggc (31, const_desc_rtx_hash, |
2761 | const_desc_rtx_eq, NULL); | |
2762 | pool->const_rtx_sym_htab = htab_create_ggc (31, const_desc_rtx_sym_hash, | |
2763 | const_desc_rtx_sym_eq, NULL); | |
2764 | pool->first = pool->last = NULL; | |
2765 | pool->offset = 0; | |
79e68feb | 2766 | } |
3234b52d RH |
2767 | \f |
2768 | /* Given a MINUS expression, simplify it if both sides | |
2769 | include the same symbol. */ | |
79e68feb | 2770 | |
3234b52d RH |
2771 | rtx |
2772 | simplify_subtraction (rtx x) | |
79e68feb | 2773 | { |
3234b52d RH |
2774 | rtx r = simplify_rtx (x); |
2775 | return r ? r : x; | |
79e68feb RS |
2776 | } |
2777 | \f | |
2778 | /* Given a constant rtx X, make (or find) a memory constant for its value | |
2779 | and return a MEM rtx to refer to it in memory. */ | |
2780 | ||
2781 | rtx | |
2e1eedd6 | 2782 | force_const_mem (enum machine_mode mode, rtx x) |
79e68feb | 2783 | { |
3234b52d RH |
2784 | struct constant_descriptor_rtx *desc, tmp; |
2785 | struct rtx_constant_pool *pool = cfun->varasm->pool; | |
79e68feb | 2786 | char label[256]; |
52859c77 | 2787 | rtx def, symbol; |
3234b52d | 2788 | hashval_t hash; |
a79e3a45 | 2789 | unsigned int align; |
3234b52d | 2790 | void **slot; |
79e68feb | 2791 | |
3a04ff64 | 2792 | /* If we're not allowed to drop X into the constant pool, don't. */ |
5fd9b178 | 2793 | if (targetm.cannot_force_const_mem (x)) |
3a04ff64 RH |
2794 | return NULL_RTX; |
2795 | ||
3234b52d RH |
2796 | /* Lookup the value in the hashtable. */ |
2797 | tmp.constant = x; | |
2798 | tmp.mode = mode; | |
2799 | hash = const_rtx_hash (x); | |
2800 | slot = htab_find_slot_with_hash (pool->const_rtx_htab, &tmp, hash, INSERT); | |
2801 | desc = *slot; | |
2802 | ||
2803 | /* If the constant was already present, return its memory. */ | |
2804 | if (desc) | |
2805 | return copy_rtx (desc->mem); | |
2806 | ||
2807 | /* Otherwise, create a new descriptor. */ | |
2808 | desc = ggc_alloc (sizeof (*desc)); | |
2809 | *slot = desc; | |
c26fbbca | 2810 | |
a79e3a45 RK |
2811 | /* Align the location counter as required by EXP's data type. */ |
2812 | align = GET_MODE_ALIGNMENT (mode == VOIDmode ? word_mode : mode); | |
e5e8a8bf | 2813 | #ifdef CONSTANT_ALIGNMENT |
1063147c | 2814 | { |
ae2bcd98 | 2815 | tree type = lang_hooks.types.type_for_mode (mode, 0); |
1063147c RS |
2816 | if (type != NULL_TREE) |
2817 | align = CONSTANT_ALIGNMENT (make_tree (type, x), align); | |
2818 | } | |
e5e8a8bf | 2819 | #endif |
79e68feb | 2820 | |
3234b52d RH |
2821 | pool->offset += (align / BITS_PER_UNIT) - 1; |
2822 | pool->offset &= ~ ((align / BITS_PER_UNIT) - 1); | |
2823 | ||
2824 | desc->next = NULL; | |
2825 | desc->constant = tmp.constant; | |
2826 | desc->offset = pool->offset; | |
2827 | desc->hash = hash; | |
2828 | desc->mode = mode; | |
2829 | desc->align = align; | |
2830 | desc->labelno = const_labelno; | |
2831 | desc->mark = 0; | |
2832 | ||
2833 | pool->offset += GET_MODE_SIZE (mode); | |
2834 | if (pool->last) | |
2835 | pool->last->next = desc; | |
a79e3a45 | 2836 | else |
3234b52d RH |
2837 | pool->first = pool->last = desc; |
2838 | pool->last = desc; | |
79e68feb | 2839 | |
a79e3a45 RK |
2840 | /* Create a string containing the label name, in LABEL. */ |
2841 | ASM_GENERATE_INTERNAL_LABEL (label, "LC", const_labelno); | |
a79e3a45 | 2842 | ++const_labelno; |
79e68feb | 2843 | |
3234b52d RH |
2844 | /* Construct the SYMBOL_REF. Make sure to mark it as belonging to |
2845 | the constants pool. */ | |
2846 | desc->sym = symbol = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label)); | |
52859c77 | 2847 | SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_LOCAL; |
3234b52d RH |
2848 | CONSTANT_POOL_ADDRESS_P (symbol) = 1; |
2849 | current_function_uses_const_pool = 1; | |
2850 | ||
2851 | /* Insert the descriptor into the symbol cross-reference table too. */ | |
2852 | slot = htab_find_slot (pool->const_rtx_sym_htab, desc, INSERT); | |
2853 | if (*slot) | |
2854 | abort (); | |
2855 | *slot = desc; | |
52859c77 | 2856 | |
3234b52d RH |
2857 | /* Construct the MEM. */ |
2858 | desc->mem = def = gen_rtx_MEM (mode, symbol); | |
ae2bcd98 | 2859 | set_mem_attributes (def, lang_hooks.types.type_for_mode (mode, 0), 1); |
79e68feb | 2860 | RTX_UNCHANGING_P (def) = 1; |
289c5b45 | 2861 | |
3234b52d RH |
2862 | /* If we're dropping a label to the constant pool, make sure we |
2863 | don't delete it. */ | |
2864 | if (GET_CODE (x) == LABEL_REF) | |
2865 | LABEL_PRESERVE_P (XEXP (x, 0)) = 1; | |
79e68feb | 2866 | |
21e9fc47 | 2867 | return copy_rtx (def); |
79e68feb RS |
2868 | } |
2869 | \f | |
2870 | /* Given a SYMBOL_REF with CONSTANT_POOL_ADDRESS_P true, return a pointer to | |
3234b52d | 2871 | the corresponding constant_descriptor_rtx structure. */ |
79e68feb | 2872 | |
3234b52d RH |
2873 | static struct constant_descriptor_rtx * |
2874 | find_pool_constant (struct rtx_constant_pool *pool, rtx sym) | |
79e68feb | 2875 | { |
3234b52d RH |
2876 | struct constant_descriptor_rtx tmp; |
2877 | tmp.sym = sym; | |
2878 | return htab_find (pool->const_rtx_sym_htab, &tmp); | |
79e68feb RS |
2879 | } |
2880 | ||
2881 | /* Given a constant pool SYMBOL_REF, return the corresponding constant. */ | |
2882 | ||
2883 | rtx | |
2e1eedd6 | 2884 | get_pool_constant (rtx addr) |
79e68feb | 2885 | { |
3234b52d | 2886 | return find_pool_constant (cfun->varasm->pool, addr)->constant; |
36edd3cc BS |
2887 | } |
2888 | ||
149d6f9e JJ |
2889 | /* Given a constant pool SYMBOL_REF, return the corresponding constant |
2890 | and whether it has been output or not. */ | |
2891 | ||
2892 | rtx | |
2e1eedd6 | 2893 | get_pool_constant_mark (rtx addr, bool *pmarked) |
149d6f9e | 2894 | { |
3234b52d RH |
2895 | struct constant_descriptor_rtx *desc; |
2896 | ||
2897 | desc = find_pool_constant (cfun->varasm->pool, addr); | |
2898 | *pmarked = (desc->mark != 0); | |
2899 | return desc->constant; | |
149d6f9e JJ |
2900 | } |
2901 | ||
36edd3cc BS |
2902 | /* Likewise, but for the constant pool of a specific function. */ |
2903 | ||
2904 | rtx | |
2e1eedd6 | 2905 | get_pool_constant_for_function (struct function *f, rtx addr) |
36edd3cc | 2906 | { |
3234b52d | 2907 | return find_pool_constant (f->varasm->pool, addr)->constant; |
79e68feb RS |
2908 | } |
2909 | ||
2910 | /* Similar, return the mode. */ | |
2911 | ||
2912 | enum machine_mode | |
2e1eedd6 | 2913 | get_pool_mode (rtx addr) |
79e68feb | 2914 | { |
3234b52d | 2915 | return find_pool_constant (cfun->varasm->pool, addr)->mode; |
36edd3cc BS |
2916 | } |
2917 | ||
2918 | enum machine_mode | |
2e1eedd6 | 2919 | get_pool_mode_for_function (struct function *f, rtx addr) |
36edd3cc | 2920 | { |
3234b52d | 2921 | return find_pool_constant (f->varasm->pool, addr)->mode; |
79e68feb RS |
2922 | } |
2923 | ||
2924 | /* Similar, return the offset in the constant pool. */ | |
2925 | ||
2926 | int | |
2e1eedd6 | 2927 | get_pool_offset (rtx addr) |
79e68feb | 2928 | { |
3234b52d | 2929 | return find_pool_constant (cfun->varasm->pool, addr)->offset; |
79e68feb RS |
2930 | } |
2931 | ||
2932 | /* Return the size of the constant pool. */ | |
2933 | ||
2934 | int | |
2e1eedd6 | 2935 | get_pool_size (void) |
79e68feb | 2936 | { |
3234b52d | 2937 | return cfun->varasm->pool->offset; |
79e68feb RS |
2938 | } |
2939 | \f | |
3234b52d RH |
2940 | /* Worker function for output_constant_pool_1. Emit assembly for X |
2941 | in MODE with known alignment ALIGN. */ | |
79e68feb | 2942 | |
3234b52d RH |
2943 | static void |
2944 | output_constant_pool_2 (enum machine_mode mode, rtx x, unsigned int align) | |
79e68feb | 2945 | { |
3234b52d | 2946 | switch (GET_MODE_CLASS (mode)) |
79e68feb | 2947 | { |
3234b52d RH |
2948 | case MODE_FLOAT: |
2949 | if (GET_CODE (x) != CONST_DOUBLE) | |
2950 | abort (); | |
2951 | else | |
085ce8c6 | 2952 | { |
3234b52d RH |
2953 | REAL_VALUE_TYPE r; |
2954 | REAL_VALUE_FROM_CONST_DOUBLE (r, x); | |
2955 | assemble_real (r, mode, align); | |
085ce8c6 | 2956 | } |
3234b52d | 2957 | break; |
79e68feb | 2958 | |
3234b52d RH |
2959 | case MODE_INT: |
2960 | case MODE_PARTIAL_INT: | |
2961 | assemble_integer (x, GET_MODE_SIZE (mode), align, 1); | |
2962 | break; | |
79e68feb | 2963 | |
3234b52d RH |
2964 | case MODE_VECTOR_FLOAT: |
2965 | case MODE_VECTOR_INT: | |
2966 | { | |
2967 | int i, units; | |
2968 | enum machine_mode submode = GET_MODE_INNER (mode); | |
2969 | unsigned int subalign = MIN (align, GET_MODE_BITSIZE (submode)); | |
79e68feb | 2970 | |
3234b52d RH |
2971 | if (GET_CODE (x) != CONST_VECTOR) |
2972 | abort (); | |
2973 | units = CONST_VECTOR_NUNITS (x); | |
79e68feb | 2974 | |
3234b52d | 2975 | for (i = 0; i < units; i++) |
69ef87e2 | 2976 | { |
3234b52d RH |
2977 | rtx elt = CONST_VECTOR_ELT (x, i); |
2978 | output_constant_pool_2 (submode, elt, i ? subalign : align); | |
69ef87e2 | 2979 | } |
3234b52d RH |
2980 | } |
2981 | break; | |
69ef87e2 | 2982 | |
3234b52d RH |
2983 | default: |
2984 | abort (); | |
2985 | } | |
2986 | } | |
69ef87e2 | 2987 | |
3234b52d | 2988 | /* Worker function for output_constant_pool. Emit POOL. */ |
69ef87e2 | 2989 | |
3234b52d RH |
2990 | static void |
2991 | output_constant_pool_1 (struct constant_descriptor_rtx *desc) | |
2992 | { | |
2993 | rtx x, tmp; | |
69ef87e2 | 2994 | |
3234b52d RH |
2995 | if (!desc->mark) |
2996 | return; | |
2997 | x = desc->constant; | |
2998 | ||
2999 | /* See if X is a LABEL_REF (or a CONST referring to a LABEL_REF) | |
3000 | whose CODE_LABEL has been deleted. This can occur if a jump table | |
3001 | is eliminated by optimization. If so, write a constant of zero | |
3002 | instead. Note that this can also happen by turning the | |
3003 | CODE_LABEL into a NOTE. */ | |
3004 | /* ??? This seems completely and utterly wrong. Certainly it's | |
3005 | not true for NOTE_INSN_DELETED_LABEL, but I disbelieve proper | |
3006 | functioning even with INSN_DELETED_P and friends. */ | |
3007 | ||
3008 | tmp = x; | |
3009 | switch (GET_CODE (x)) | |
3010 | { | |
3011 | case CONST: | |
3012 | if (GET_CODE (XEXP (x, 0)) != PLUS | |
3013 | || GET_CODE (XEXP (XEXP (x, 0), 0)) != LABEL_REF) | |
3014 | break; | |
3015 | tmp = XEXP (XEXP (x, 0), 0); | |
3016 | /* FALLTHRU */ | |
69ef87e2 | 3017 | |
3234b52d RH |
3018 | case LABEL_REF: |
3019 | tmp = XEXP (x, 0); | |
3020 | if (INSN_DELETED_P (tmp) | |
4b4bf941 | 3021 | || (NOTE_P (tmp) |
3234b52d RH |
3022 | && NOTE_LINE_NUMBER (tmp) == NOTE_INSN_DELETED)) |
3023 | { | |
79e68feb | 3024 | abort (); |
3234b52d | 3025 | x = const0_rtx; |
79e68feb | 3026 | } |
3234b52d | 3027 | break; |
79e68feb | 3028 | |
3234b52d RH |
3029 | default: |
3030 | break; | |
3031 | } | |
3032 | ||
3033 | /* First switch to correct section. */ | |
5fd9b178 | 3034 | targetm.asm_out.select_rtx_section (desc->mode, x, desc->align); |
f4111593 | 3035 | |
29a82058 | 3036 | #ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY |
3234b52d RH |
3037 | ASM_OUTPUT_SPECIAL_POOL_ENTRY (asm_out_file, x, desc->mode, |
3038 | desc->align, desc->labelno, done); | |
29a82058 | 3039 | #endif |
7f83c0e7 | 3040 | |
3234b52d | 3041 | assemble_align (desc->align); |
5c8c0abd | 3042 | |
3234b52d | 3043 | /* Output the label. */ |
5fd9b178 | 3044 | targetm.asm_out.internal_label (asm_out_file, "LC", desc->labelno); |
91674c37 | 3045 | |
3234b52d RH |
3046 | /* Output the data. */ |
3047 | output_constant_pool_2 (desc->mode, x, desc->align); | |
91674c37 | 3048 | |
3234b52d RH |
3049 | /* Make sure all constants in SECTION_MERGE and not SECTION_STRINGS |
3050 | sections have proper size. */ | |
3051 | if (desc->align > GET_MODE_BITSIZE (desc->mode) | |
3052 | && in_section == in_named | |
3053 | && get_named_section_flags (in_named_name) & SECTION_MERGE) | |
3054 | assemble_align (desc->align); | |
91674c37 | 3055 | |
3234b52d RH |
3056 | #ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY |
3057 | done: | |
3058 | #endif | |
3059 | return; | |
3060 | } | |
91674c37 | 3061 | |
3234b52d RH |
3062 | /* Given a SYMBOL_REF CURRENT_RTX, mark it and all constants it refers |
3063 | to as used. Emit referenced deferred strings. This function can | |
3064 | be used with for_each_rtx to mark all SYMBOL_REFs in an rtx. */ | |
d2ce9169 | 3065 | |
3234b52d RH |
3066 | static int |
3067 | mark_constant (rtx *current_rtx, void *data) | |
3068 | { | |
3069 | struct rtx_constant_pool *pool = data; | |
3070 | rtx x = *current_rtx; | |
91674c37 | 3071 | |
3234b52d RH |
3072 | if (x == NULL_RTX || GET_CODE (x) != SYMBOL_REF) |
3073 | return 0; | |
afdfb380 | 3074 | |
3234b52d RH |
3075 | if (CONSTANT_POOL_ADDRESS_P (x)) |
3076 | { | |
3077 | struct constant_descriptor_rtx *desc = find_pool_constant (pool, x); | |
3078 | if (desc->mark == 0) | |
3079 | { | |
3080 | desc->mark = 1; | |
3081 | for_each_rtx (&desc->constant, mark_constant, pool); | |
3082 | } | |
afdfb380 | 3083 | } |
3234b52d RH |
3084 | else if (TREE_CONSTANT_POOL_ADDRESS_P (x)) |
3085 | { | |
3086 | tree exp = SYMBOL_REF_DECL (x); | |
3087 | if (!TREE_ASM_WRITTEN (exp)) | |
3088 | { | |
3089 | n_deferred_constants--; | |
3090 | output_constant_def_contents (x); | |
3091 | } | |
3092 | } | |
3093 | ||
3094 | return -1; | |
3095 | } | |
91674c37 | 3096 | |
3234b52d | 3097 | /* Look through appropriate parts of INSN, marking all entries in the |
fcbd8ef2 JO |
3098 | constant pool which are actually being used. Entries that are only |
3099 | referenced by other constants are also marked as used. Emit | |
3100 | deferred strings that are used. */ | |
3101 | ||
91674c37 | 3102 | static void |
3234b52d | 3103 | mark_constants (struct rtx_constant_pool *pool, rtx insn) |
91674c37 | 3104 | { |
3234b52d | 3105 | if (!INSN_P (insn)) |
91674c37 ILT |
3106 | return; |
3107 | ||
91674c37 ILT |
3108 | /* Insns may appear inside a SEQUENCE. Only check the patterns of |
3109 | insns, not any notes that may be attached. We don't want to mark | |
3110 | a constant just because it happens to appear in a REG_EQUIV note. */ | |
3234b52d | 3111 | if (GET_CODE (PATTERN (insn)) == SEQUENCE) |
91674c37 | 3112 | { |
3234b52d RH |
3113 | rtx seq = PATTERN (insn); |
3114 | int i, n = XVECLEN (seq, 0); | |
3115 | for (i = 0; i < n; ++i) | |
3116 | { | |
3117 | rtx subinsn = XVECEXP (seq, 0, i); | |
3118 | if (INSN_P (subinsn)) | |
3119 | for_each_rtx (&PATTERN (subinsn), mark_constant, pool); | |
3120 | } | |
91674c37 | 3121 | } |
3234b52d RH |
3122 | else |
3123 | for_each_rtx (&PATTERN (insn), mark_constant, pool); | |
3124 | } | |
91674c37 | 3125 | |
3234b52d RH |
3126 | /* Look through the instructions for this function, and mark all the |
3127 | entries in POOL which are actually being used. Emit deferred constants | |
3128 | which have indeed been used. */ | |
91674c37 | 3129 | |
3234b52d RH |
3130 | static void |
3131 | mark_constant_pool (struct rtx_constant_pool *pool) | |
3132 | { | |
3133 | rtx insn, link; | |
91674c37 | 3134 | |
3234b52d RH |
3135 | if (pool->first == 0 && n_deferred_constants == 0) |
3136 | return; | |
91674c37 | 3137 | |
3234b52d RH |
3138 | for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) |
3139 | mark_constants (pool, insn); | |
91674c37 | 3140 | |
3234b52d RH |
3141 | for (link = current_function_epilogue_delay_list; |
3142 | link; | |
3143 | link = XEXP (link, 1)) | |
3144 | mark_constants (pool, XEXP (link, 0)); | |
91674c37 | 3145 | } |
fcbd8ef2 | 3146 | |
3234b52d | 3147 | /* Write all the constants in the constant pool. */ |
fcbd8ef2 | 3148 | |
3234b52d RH |
3149 | void |
3150 | output_constant_pool (const char *fnname ATTRIBUTE_UNUSED, | |
3151 | tree fndecl ATTRIBUTE_UNUSED) | |
fcbd8ef2 | 3152 | { |
3234b52d RH |
3153 | struct rtx_constant_pool *pool = cfun->varasm->pool; |
3154 | struct constant_descriptor_rtx *desc; | |
fcbd8ef2 | 3155 | |
3234b52d RH |
3156 | /* It is possible for gcc to call force_const_mem and then to later |
3157 | discard the instructions which refer to the constant. In such a | |
3158 | case we do not need to output the constant. */ | |
3159 | mark_constant_pool (pool); | |
a79e3a45 | 3160 | |
3234b52d RH |
3161 | #ifdef ASM_OUTPUT_POOL_PROLOGUE |
3162 | ASM_OUTPUT_POOL_PROLOGUE (asm_out_file, fnname, fndecl, pool->offset); | |
3163 | #endif | |
3164 | ||
3165 | for (desc = pool->first; desc ; desc = desc->next) | |
3166 | output_constant_pool_1 (desc); | |
3167 | ||
3168 | #ifdef ASM_OUTPUT_POOL_EPILOGUE | |
3169 | ASM_OUTPUT_POOL_EPILOGUE (asm_out_file, fnname, fndecl, pool->offset); | |
3170 | #endif | |
fcbd8ef2 | 3171 | } |
79e68feb | 3172 | \f |
b2218cc1 | 3173 | /* Determine what kind of relocations EXP may need. */ |
79e68feb | 3174 | |
b2218cc1 AO |
3175 | int |
3176 | compute_reloc_for_constant (tree exp) | |
79e68feb | 3177 | { |
7eca317a | 3178 | int reloc = 0, reloc2; |
ac79cd5a | 3179 | tree tem; |
79e68feb | 3180 | |
c165f94f CC |
3181 | /* Give the front-end a chance to convert VALUE to something that |
3182 | looks more like a constant to the back-end. */ | |
ae2bcd98 | 3183 | exp = lang_hooks.expand_constant (exp); |
c165f94f | 3184 | |
79e68feb RS |
3185 | switch (TREE_CODE (exp)) |
3186 | { | |
3187 | case ADDR_EXPR: | |
5d056e9b | 3188 | case FDESC_EXPR: |
ac79cd5a RK |
3189 | /* Go inside any operations that get_inner_reference can handle and see |
3190 | if what's inside is a constant: no need to do anything here for | |
3191 | addresses of variables or functions. */ | |
3192 | for (tem = TREE_OPERAND (exp, 0); handled_component_p (tem); | |
3193 | tem = TREE_OPERAND (tem, 0)) | |
3194 | ; | |
79e68feb | 3195 | |
d2c35e67 JH |
3196 | if (TREE_PUBLIC (tem)) |
3197 | reloc |= 2; | |
3198 | else | |
3199 | reloc |= 1; | |
79e68feb RS |
3200 | break; |
3201 | ||
3202 | case PLUS_EXPR: | |
b2218cc1 AO |
3203 | reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0)); |
3204 | reloc |= compute_reloc_for_constant (TREE_OPERAND (exp, 1)); | |
79e68feb RS |
3205 | break; |
3206 | ||
7eca317a | 3207 | case MINUS_EXPR: |
b2218cc1 AO |
3208 | reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0)); |
3209 | reloc2 = compute_reloc_for_constant (TREE_OPERAND (exp, 1)); | |
7eca317a JJ |
3210 | /* The difference of two local labels is computable at link time. */ |
3211 | if (reloc == 1 && reloc2 == 1) | |
3212 | reloc = 0; | |
3213 | else | |
3214 | reloc |= reloc2; | |
3215 | break; | |
3216 | ||
79e68feb RS |
3217 | case NOP_EXPR: |
3218 | case CONVERT_EXPR: | |
37a52112 | 3219 | case NON_LVALUE_EXPR: |
b2218cc1 | 3220 | reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0)); |
79e68feb RS |
3221 | break; |
3222 | ||
3223 | case CONSTRUCTOR: | |
ac79cd5a RK |
3224 | for (tem = CONSTRUCTOR_ELTS (exp); tem; tem = TREE_CHAIN (tem)) |
3225 | if (TREE_VALUE (tem) != 0) | |
b2218cc1 | 3226 | reloc |= compute_reloc_for_constant (TREE_VALUE (tem)); |
ac79cd5a | 3227 | |
79e68feb RS |
3228 | break; |
3229 | ||
e9a25f70 | 3230 | default: |
79e68feb RS |
3231 | break; |
3232 | } | |
3233 | return reloc; | |
3234 | } | |
b2218cc1 AO |
3235 | |
3236 | /* Find all the constants whose addresses are referenced inside of EXP, | |
3237 | and make sure assembler code with a label has been output for each one. | |
3238 | Indicate whether an ADDR_EXPR has been encountered. */ | |
3239 | ||
3240 | static void | |
3241 | output_addressed_constants (tree exp) | |
3242 | { | |
3243 | tree tem; | |
3244 | ||
3245 | /* Give the front-end a chance to convert VALUE to something that | |
3246 | looks more like a constant to the back-end. */ | |
ae2bcd98 | 3247 | exp = lang_hooks.expand_constant (exp); |
b2218cc1 AO |
3248 | |
3249 | switch (TREE_CODE (exp)) | |
3250 | { | |
3251 | case ADDR_EXPR: | |
3252 | case FDESC_EXPR: | |
3253 | /* Go inside any operations that get_inner_reference can handle and see | |
3254 | if what's inside is a constant: no need to do anything here for | |
3255 | addresses of variables or functions. */ | |
3256 | for (tem = TREE_OPERAND (exp, 0); handled_component_p (tem); | |
3257 | tem = TREE_OPERAND (tem, 0)) | |
3258 | ; | |
3259 | ||
3260 | if (TREE_CODE_CLASS (TREE_CODE (tem)) == 'c' | |
3261 | || TREE_CODE (tem) == CONSTRUCTOR) | |
3262 | output_constant_def (tem, 0); | |
3263 | break; | |
3264 | ||
3265 | case PLUS_EXPR: | |
3266 | case MINUS_EXPR: | |
3267 | output_addressed_constants (TREE_OPERAND (exp, 1)); | |
3268 | /* Fall through. */ | |
3269 | ||
3270 | case NOP_EXPR: | |
3271 | case CONVERT_EXPR: | |
3272 | case NON_LVALUE_EXPR: | |
3273 | output_addressed_constants (TREE_OPERAND (exp, 0)); | |
3274 | break; | |
3275 | ||
3276 | case CONSTRUCTOR: | |
3277 | for (tem = CONSTRUCTOR_ELTS (exp); tem; tem = TREE_CHAIN (tem)) | |
3278 | if (TREE_VALUE (tem) != 0) | |
3279 | output_addressed_constants (TREE_VALUE (tem)); | |
3280 | ||
3281 | break; | |
3282 | ||
3283 | default: | |
3284 | break; | |
3285 | } | |
3286 | } | |
79e68feb | 3287 | \f |
14a774a9 RK |
3288 | /* Return nonzero if VALUE is a valid constant-valued expression |
3289 | for use in initializing a static variable; one that can be an | |
3290 | element of a "constant" initializer. | |
3291 | ||
3292 | Return null_pointer_node if the value is absolute; | |
3293 | if it is relocatable, return the variable that determines the relocation. | |
3294 | We assume that VALUE has been folded as much as possible; | |
3295 | therefore, we do not need to check for such things as | |
3296 | arithmetic-combinations of integers. */ | |
3297 | ||
3298 | tree | |
2e1eedd6 | 3299 | initializer_constant_valid_p (tree value, tree endtype) |
14a774a9 | 3300 | { |
99740276 MM |
3301 | /* Give the front-end a chance to convert VALUE to something that |
3302 | looks more like a constant to the back-end. */ | |
ae2bcd98 | 3303 | value = lang_hooks.expand_constant (value); |
99740276 | 3304 | |
14a774a9 RK |
3305 | switch (TREE_CODE (value)) |
3306 | { | |
3307 | case CONSTRUCTOR: | |
3308 | if ((TREE_CODE (TREE_TYPE (value)) == UNION_TYPE | |
3309 | || TREE_CODE (TREE_TYPE (value)) == RECORD_TYPE) | |
3310 | && TREE_CONSTANT (value) | |
3311 | && CONSTRUCTOR_ELTS (value)) | |
cf9ad9a7 MM |
3312 | { |
3313 | tree elt; | |
3314 | bool absolute = true; | |
3315 | ||
3316 | for (elt = CONSTRUCTOR_ELTS (value); elt; elt = TREE_CHAIN (elt)) | |
3317 | { | |
3318 | tree reloc; | |
3319 | value = TREE_VALUE (elt); | |
3320 | reloc = initializer_constant_valid_p (value, TREE_TYPE (value)); | |
3321 | if (!reloc) | |
3322 | return NULL_TREE; | |
3323 | if (reloc != null_pointer_node) | |
3324 | absolute = false; | |
3325 | } | |
3326 | /* For a non-absolute relocation, there is no single | |
3327 | variable that can be "the variable that determines the | |
3328 | relocation." */ | |
3329 | return absolute ? null_pointer_node : error_mark_node; | |
3330 | } | |
46f9491e | 3331 | |
cf9ad9a7 | 3332 | return TREE_STATIC (value) ? null_pointer_node : NULL_TREE; |
14a774a9 RK |
3333 | |
3334 | case INTEGER_CST: | |
69ef87e2 | 3335 | case VECTOR_CST: |
14a774a9 RK |
3336 | case REAL_CST: |
3337 | case STRING_CST: | |
3338 | case COMPLEX_CST: | |
3339 | return null_pointer_node; | |
3340 | ||
3341 | case ADDR_EXPR: | |
67231816 | 3342 | case FDESC_EXPR: |
8c8de5fc | 3343 | return staticp (TREE_OPERAND (value, 0)) ? TREE_OPERAND (value, 0) : 0; |
14a774a9 | 3344 | |
ed239f5a | 3345 | case VIEW_CONVERT_EXPR: |
14a774a9 RK |
3346 | case NON_LVALUE_EXPR: |
3347 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype); | |
3348 | ||
3349 | case CONVERT_EXPR: | |
3350 | case NOP_EXPR: | |
3351 | /* Allow conversions between pointer types. */ | |
3352 | if (POINTER_TYPE_P (TREE_TYPE (value)) | |
3353 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
3354 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype); | |
3355 | ||
3356 | /* Allow conversions between real types. */ | |
3357 | if (FLOAT_TYPE_P (TREE_TYPE (value)) | |
3358 | && FLOAT_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
3359 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype); | |
3360 | ||
3361 | /* Allow length-preserving conversions between integer types. */ | |
3362 | if (INTEGRAL_TYPE_P (TREE_TYPE (value)) | |
3363 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0))) | |
3364 | && (TYPE_PRECISION (TREE_TYPE (value)) | |
3365 | == TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (value, 0))))) | |
3366 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), endtype); | |
3367 | ||
3368 | /* Allow conversions between other integer types only if | |
3369 | explicit value. */ | |
3370 | if (INTEGRAL_TYPE_P (TREE_TYPE (value)) | |
3371 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
3372 | { | |
3373 | tree inner = initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
3374 | endtype); | |
3375 | if (inner == null_pointer_node) | |
3376 | return null_pointer_node; | |
3377 | break; | |
3378 | } | |
3379 | ||
3380 | /* Allow (int) &foo provided int is as wide as a pointer. */ | |
3381 | if (INTEGRAL_TYPE_P (TREE_TYPE (value)) | |
3382 | && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0))) | |
3383 | && (TYPE_PRECISION (TREE_TYPE (value)) | |
3384 | >= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (value, 0))))) | |
3385 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
3386 | endtype); | |
3387 | ||
3388 | /* Likewise conversions from int to pointers, but also allow | |
3389 | conversions from 0. */ | |
0dff37fb MM |
3390 | if ((POINTER_TYPE_P (TREE_TYPE (value)) |
3391 | || TREE_CODE (TREE_TYPE (value)) == OFFSET_TYPE) | |
14a774a9 RK |
3392 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (value, 0)))) |
3393 | { | |
3394 | if (integer_zerop (TREE_OPERAND (value, 0))) | |
3395 | return null_pointer_node; | |
3396 | else if (TYPE_PRECISION (TREE_TYPE (value)) | |
3397 | <= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (value, 0)))) | |
3398 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
3399 | endtype); | |
3400 | } | |
3401 | ||
64480988 MM |
3402 | /* Allow conversions to struct or union types if the value |
3403 | inside is okay. */ | |
3404 | if (TREE_CODE (TREE_TYPE (value)) == RECORD_TYPE | |
3405 | || TREE_CODE (TREE_TYPE (value)) == UNION_TYPE) | |
14a774a9 RK |
3406 | return initializer_constant_valid_p (TREE_OPERAND (value, 0), |
3407 | endtype); | |
3408 | break; | |
3409 | ||
3410 | case PLUS_EXPR: | |
3411 | if (! INTEGRAL_TYPE_P (endtype) | |
3412 | || TYPE_PRECISION (endtype) >= POINTER_SIZE) | |
c26fbbca | 3413 | { |
14a774a9 RK |
3414 | tree valid0 = initializer_constant_valid_p (TREE_OPERAND (value, 0), |
3415 | endtype); | |
3416 | tree valid1 = initializer_constant_valid_p (TREE_OPERAND (value, 1), | |
3417 | endtype); | |
3418 | /* If either term is absolute, use the other terms relocation. */ | |
3419 | if (valid0 == null_pointer_node) | |
3420 | return valid1; | |
3421 | if (valid1 == null_pointer_node) | |
3422 | return valid0; | |
c26fbbca | 3423 | } |
14a774a9 RK |
3424 | break; |
3425 | ||
3426 | case MINUS_EXPR: | |
3427 | if (! INTEGRAL_TYPE_P (endtype) | |
3428 | || TYPE_PRECISION (endtype) >= POINTER_SIZE) | |
3429 | { | |
3430 | tree valid0 = initializer_constant_valid_p (TREE_OPERAND (value, 0), | |
3431 | endtype); | |
3432 | tree valid1 = initializer_constant_valid_p (TREE_OPERAND (value, 1), | |
3433 | endtype); | |
3434 | /* Win if second argument is absolute. */ | |
3435 | if (valid1 == null_pointer_node) | |
3436 | return valid0; | |
3437 | /* Win if both arguments have the same relocation. | |
3438 | Then the value is absolute. */ | |
3439 | if (valid0 == valid1 && valid0 != 0) | |
3440 | return null_pointer_node; | |
212addfa JO |
3441 | |
3442 | /* Since GCC guarantees that string constants are unique in the | |
3443 | generated code, a subtraction between two copies of the same | |
3444 | constant string is absolute. */ | |
3445 | if (valid0 && TREE_CODE (valid0) == STRING_CST && | |
3446 | valid1 && TREE_CODE (valid1) == STRING_CST && | |
3447 | TREE_STRING_POINTER (valid0) == TREE_STRING_POINTER (valid1)) | |
3448 | return null_pointer_node; | |
14a774a9 RK |
3449 | } |
3450 | ||
3451 | /* Support differences between labels. */ | |
3452 | if (INTEGRAL_TYPE_P (endtype)) | |
3453 | { | |
3454 | tree op0, op1; | |
3455 | op0 = TREE_OPERAND (value, 0); | |
3456 | op1 = TREE_OPERAND (value, 1); | |
fdf473ae RH |
3457 | |
3458 | /* Like STRIP_NOPS except allow the operand mode to widen. | |
14b493d6 | 3459 | This works around a feature of fold that simplifies |
fdf473ae RH |
3460 | (int)(p1 - p2) to ((int)p1 - (int)p2) under the theory |
3461 | that the narrower operation is cheaper. */ | |
3462 | ||
3463 | while (TREE_CODE (op0) == NOP_EXPR | |
3464 | || TREE_CODE (op0) == CONVERT_EXPR | |
3465 | || TREE_CODE (op0) == NON_LVALUE_EXPR) | |
3466 | { | |
3467 | tree inner = TREE_OPERAND (op0, 0); | |
3468 | if (inner == error_mark_node | |
3469 | || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner))) | |
3470 | || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op0))) | |
3471 | > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner))))) | |
3472 | break; | |
3473 | op0 = inner; | |
3474 | } | |
3475 | ||
3476 | while (TREE_CODE (op1) == NOP_EXPR | |
3477 | || TREE_CODE (op1) == CONVERT_EXPR | |
3478 | || TREE_CODE (op1) == NON_LVALUE_EXPR) | |
3479 | { | |
3480 | tree inner = TREE_OPERAND (op1, 0); | |
3481 | if (inner == error_mark_node | |
3482 | || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner))) | |
3483 | || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op1))) | |
3484 | > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner))))) | |
3485 | break; | |
3486 | op1 = inner; | |
3487 | } | |
14a774a9 RK |
3488 | |
3489 | if (TREE_CODE (op0) == ADDR_EXPR | |
3490 | && TREE_CODE (TREE_OPERAND (op0, 0)) == LABEL_DECL | |
3491 | && TREE_CODE (op1) == ADDR_EXPR | |
3492 | && TREE_CODE (TREE_OPERAND (op1, 0)) == LABEL_DECL) | |
3493 | return null_pointer_node; | |
3494 | } | |
3495 | break; | |
3496 | ||
3497 | default: | |
3498 | break; | |
3499 | } | |
3500 | ||
3501 | return 0; | |
3502 | } | |
3503 | \f | |
79e68feb RS |
3504 | /* Output assembler code for constant EXP to FILE, with no label. |
3505 | This includes the pseudo-op such as ".int" or ".byte", and a newline. | |
3506 | Assumes output_addressed_constants has been done on EXP already. | |
3507 | ||
3508 | Generate exactly SIZE bytes of assembler data, padding at the end | |
3509 | with zeros if necessary. SIZE must always be specified. | |
3510 | ||
3511 | SIZE is important for structure constructors, | |
3512 | since trailing members may have been omitted from the constructor. | |
3513 | It is also important for initialization of arrays from string constants | |
3514 | since the full length of the string constant might not be wanted. | |
3515 | It is also needed for initialization of unions, where the initializer's | |
3516 | type is just one member, and that may not be as long as the union. | |
3517 | ||
3518 | There a case in which we would fail to output exactly SIZE bytes: | |
3519 | for a structure constructor that wants to produce more than SIZE bytes. | |
c8af3574 RH |
3520 | But such constructors will never be generated for any possible input. |
3521 | ||
3522 | ALIGN is the alignment of the data in bits. */ | |
79e68feb RS |
3523 | |
3524 | void | |
2e1eedd6 | 3525 | output_constant (tree exp, unsigned HOST_WIDE_INT size, unsigned int align) |
79e68feb | 3526 | { |
ac79cd5a | 3527 | enum tree_code code; |
58e15542 | 3528 | unsigned HOST_WIDE_INT thissize; |
79e68feb | 3529 | |
14b493d6 | 3530 | /* Some front-ends use constants other than the standard language-independent |
ed239f5a RK |
3531 | varieties, but which may still be output directly. Give the front-end a |
3532 | chance to convert EXP to a language-independent representation. */ | |
ae2bcd98 | 3533 | exp = lang_hooks.expand_constant (exp); |
e697e20a | 3534 | |
e9996db7 | 3535 | if (size == 0 || flag_syntax_only) |
79e68feb RS |
3536 | return; |
3537 | ||
ac79cd5a RK |
3538 | /* Eliminate any conversions since we'll be outputting the underlying |
3539 | constant. */ | |
3540 | while (TREE_CODE (exp) == NOP_EXPR || TREE_CODE (exp) == CONVERT_EXPR | |
ed239f5a RK |
3541 | || TREE_CODE (exp) == NON_LVALUE_EXPR |
3542 | || TREE_CODE (exp) == VIEW_CONVERT_EXPR) | |
ac79cd5a RK |
3543 | exp = TREE_OPERAND (exp, 0); |
3544 | ||
3545 | code = TREE_CODE (TREE_TYPE (exp)); | |
3546 | thissize = int_size_in_bytes (TREE_TYPE (exp)); | |
be1ad04c | 3547 | |
fff9e713 MT |
3548 | /* Allow a constructor with no elements for any data type. |
3549 | This means to fill the space with zeros. */ | |
77fa0940 | 3550 | if (TREE_CODE (exp) == CONSTRUCTOR && CONSTRUCTOR_ELTS (exp) == 0) |
fff9e713 | 3551 | { |
b93a436e | 3552 | assemble_zeros (size); |
fff9e713 MT |
3553 | return; |
3554 | } | |
3555 | ||
67231816 RH |
3556 | if (TREE_CODE (exp) == FDESC_EXPR) |
3557 | { | |
f42f3c2d | 3558 | #ifdef ASM_OUTPUT_FDESC |
67231816 RH |
3559 | HOST_WIDE_INT part = tree_low_cst (TREE_OPERAND (exp, 1), 0); |
3560 | tree decl = TREE_OPERAND (exp, 0); | |
67231816 RH |
3561 | ASM_OUTPUT_FDESC (asm_out_file, decl, part); |
3562 | #else | |
3563 | abort (); | |
3564 | #endif | |
3565 | return; | |
3566 | } | |
3567 | ||
ac79cd5a | 3568 | /* Now output the underlying data. If we've handling the padding, return. |
42048866 | 3569 | Otherwise, break and ensure SIZE is the size written. */ |
79e68feb RS |
3570 | switch (code) |
3571 | { | |
644ea577 RS |
3572 | case CHAR_TYPE: |
3573 | case BOOLEAN_TYPE: | |
79e68feb RS |
3574 | case INTEGER_TYPE: |
3575 | case ENUMERAL_TYPE: | |
3576 | case POINTER_TYPE: | |
3577 | case REFERENCE_TYPE: | |
a5ac359a | 3578 | case OFFSET_TYPE: |
37366632 | 3579 | if (! assemble_integer (expand_expr (exp, NULL_RTX, VOIDmode, |
79e68feb | 3580 | EXPAND_INITIALIZER), |
42048866 | 3581 | MIN (size, thissize), align, 0)) |
79e68feb | 3582 | error ("initializer for integer value is too complicated"); |
79e68feb RS |
3583 | break; |
3584 | ||
3585 | case REAL_TYPE: | |
3586 | if (TREE_CODE (exp) != REAL_CST) | |
3587 | error ("initializer for floating value is not a floating constant"); | |
3588 | ||
02befdf4 | 3589 | assemble_real (TREE_REAL_CST (exp), TYPE_MODE (TREE_TYPE (exp)), align); |
79e68feb RS |
3590 | break; |
3591 | ||
3592 | case COMPLEX_TYPE: | |
ac79cd5a RK |
3593 | output_constant (TREE_REALPART (exp), thissize / 2, align); |
3594 | output_constant (TREE_IMAGPART (exp), thissize / 2, | |
3595 | min_align (align, BITS_PER_UNIT * (thissize / 2))); | |
79e68feb RS |
3596 | break; |
3597 | ||
3598 | case ARRAY_TYPE: | |
e6834654 | 3599 | case VECTOR_TYPE: |
79e68feb RS |
3600 | if (TREE_CODE (exp) == CONSTRUCTOR) |
3601 | { | |
c8af3574 | 3602 | output_constructor (exp, size, align); |
79e68feb RS |
3603 | return; |
3604 | } | |
3605 | else if (TREE_CODE (exp) == STRING_CST) | |
3606 | { | |
58e15542 JH |
3607 | thissize = MIN ((unsigned HOST_WIDE_INT)TREE_STRING_LENGTH (exp), |
3608 | size); | |
ac79cd5a | 3609 | assemble_string (TREE_STRING_POINTER (exp), thissize); |
79e68feb | 3610 | } |
d744e06e AH |
3611 | else if (TREE_CODE (exp) == VECTOR_CST) |
3612 | { | |
3613 | int elt_size; | |
3614 | tree link; | |
3615 | unsigned int nalign; | |
3616 | enum machine_mode inner; | |
3617 | ||
3618 | inner = GET_MODE_INNER (TYPE_MODE (TREE_TYPE (exp))); | |
3619 | nalign = MIN (align, GET_MODE_ALIGNMENT (inner)); | |
3620 | ||
3621 | elt_size = GET_MODE_UNIT_SIZE (TYPE_MODE (TREE_TYPE (exp))); | |
3622 | ||
3623 | link = TREE_VECTOR_CST_ELTS (exp); | |
3624 | output_constant (TREE_VALUE (link), elt_size, align); | |
3625 | while ((link = TREE_CHAIN (link)) != NULL) | |
3626 | output_constant (TREE_VALUE (link), elt_size, nalign); | |
3627 | } | |
79e68feb RS |
3628 | else |
3629 | abort (); | |
3630 | break; | |
3631 | ||
3632 | case RECORD_TYPE: | |
3633 | case UNION_TYPE: | |
3634 | if (TREE_CODE (exp) == CONSTRUCTOR) | |
c8af3574 | 3635 | output_constructor (exp, size, align); |
79e68feb RS |
3636 | else |
3637 | abort (); | |
3638 | return; | |
474bda6c PB |
3639 | |
3640 | case SET_TYPE: | |
3641 | if (TREE_CODE (exp) == INTEGER_CST) | |
3642 | assemble_integer (expand_expr (exp, NULL_RTX, | |
3643 | VOIDmode, EXPAND_INITIALIZER), | |
c26fbbca | 3644 | thissize, align, 1); |
474bda6c PB |
3645 | else if (TREE_CODE (exp) == CONSTRUCTOR) |
3646 | { | |
703ad42b | 3647 | unsigned char *buffer = alloca (thissize); |
ac79cd5a | 3648 | if (get_set_constructor_bytes (exp, buffer, thissize)) |
474bda6c | 3649 | abort (); |
ac79cd5a | 3650 | assemble_string ((char *) buffer, thissize); |
474bda6c PB |
3651 | } |
3652 | else | |
3653 | error ("unknown set constructor type"); | |
3654 | return; | |
e9a25f70 | 3655 | |
0974a3b8 RK |
3656 | case ERROR_MARK: |
3657 | return; | |
3658 | ||
e9a25f70 | 3659 | default: |
ac79cd5a | 3660 | abort (); |
79e68feb RS |
3661 | } |
3662 | ||
d3e0dffb JH |
3663 | if (size > thissize) |
3664 | assemble_zeros (size - thissize); | |
79e68feb | 3665 | } |
ca695ac9 | 3666 | |
79e68feb | 3667 | \f |
a25f1211 RH |
3668 | /* Subroutine of output_constructor, used for computing the size of |
3669 | arrays of unspecified length. VAL must be a CONSTRUCTOR of an array | |
3670 | type with an unspecified upper bound. */ | |
3671 | ||
ffc5c6a9 | 3672 | static unsigned HOST_WIDE_INT |
2e1eedd6 | 3673 | array_size_for_constructor (tree val) |
a25f1211 RH |
3674 | { |
3675 | tree max_index, i; | |
3676 | ||
ac79cd5a RK |
3677 | /* This code used to attempt to handle string constants that are not |
3678 | arrays of single-bytes, but nothing else does, so there's no point in | |
3679 | doing it here. */ | |
b6fc7110 | 3680 | if (TREE_CODE (val) == STRING_CST) |
ac79cd5a RK |
3681 | return TREE_STRING_LENGTH (val); |
3682 | ||
a25f1211 | 3683 | max_index = NULL_TREE; |
c26fbbca | 3684 | for (i = CONSTRUCTOR_ELTS (val); i; i = TREE_CHAIN (i)) |
a25f1211 RH |
3685 | { |
3686 | tree index = TREE_PURPOSE (i); | |
3687 | ||
3688 | if (TREE_CODE (index) == RANGE_EXPR) | |
3689 | index = TREE_OPERAND (index, 1); | |
3690 | if (max_index == NULL_TREE || tree_int_cst_lt (max_index, index)) | |
3691 | max_index = index; | |
3692 | } | |
3693 | ||
a25f1211 | 3694 | if (max_index == NULL_TREE) |
ffc5c6a9 | 3695 | return 0; |
a25f1211 RH |
3696 | |
3697 | /* Compute the total number of array elements. */ | |
46f9491e | 3698 | i = size_binop (MINUS_EXPR, convert (sizetype, max_index), |
ffc5c6a9 RH |
3699 | convert (sizetype, |
3700 | TYPE_MIN_VALUE (TYPE_DOMAIN (TREE_TYPE (val))))); | |
3701 | i = size_binop (PLUS_EXPR, i, convert (sizetype, integer_one_node)); | |
a25f1211 RH |
3702 | |
3703 | /* Multiply by the array element unit size to find number of bytes. */ | |
ffc5c6a9 | 3704 | i = size_binop (MULT_EXPR, i, TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (val)))); |
a25f1211 RH |
3705 | |
3706 | return tree_low_cst (i, 1); | |
3707 | } | |
3708 | ||
3709 | /* Subroutine of output_constant, used for CONSTRUCTORs (aggregate constants). | |
79e68feb RS |
3710 | Generate at least SIZE bytes, padding if necessary. */ |
3711 | ||
5a13eaa4 | 3712 | static void |
2e1eedd6 AJ |
3713 | output_constructor (tree exp, unsigned HOST_WIDE_INT size, |
3714 | unsigned int align) | |
79e68feb | 3715 | { |
85f3d674 | 3716 | tree type = TREE_TYPE (exp); |
b3694847 | 3717 | tree link, field = 0; |
85f3d674 | 3718 | tree min_index = 0; |
79e68feb RS |
3719 | /* Number of bytes output or skipped so far. |
3720 | In other words, current position within the constructor. */ | |
85f3d674 | 3721 | HOST_WIDE_INT total_bytes = 0; |
272d0bee | 3722 | /* Nonzero means BYTE contains part of a byte, to be output. */ |
79e68feb | 3723 | int byte_buffer_in_use = 0; |
b3694847 | 3724 | int byte = 0; |
79e68feb | 3725 | |
37366632 | 3726 | if (HOST_BITS_PER_WIDE_INT < BITS_PER_UNIT) |
79e68feb RS |
3727 | abort (); |
3728 | ||
85f3d674 RK |
3729 | if (TREE_CODE (type) == RECORD_TYPE) |
3730 | field = TYPE_FIELDS (type); | |
79e68feb | 3731 | |
85f3d674 RK |
3732 | if (TREE_CODE (type) == ARRAY_TYPE |
3733 | && TYPE_DOMAIN (type) != 0) | |
3734 | min_index = TYPE_MIN_VALUE (TYPE_DOMAIN (type)); | |
13b457e7 | 3735 | |
79e68feb RS |
3736 | /* As LINK goes through the elements of the constant, |
3737 | FIELD goes through the structure fields, if the constant is a structure. | |
3738 | if the constant is a union, then we override this, | |
3739 | by getting the field from the TREE_LIST element. | |
43f7bed5 VM |
3740 | But the constant could also be an array. Then FIELD is zero. |
3741 | ||
3742 | There is always a maximum of one element in the chain LINK for unions | |
3743 | (even if the initializer in a source program incorrectly contains | |
2d76cb1a | 3744 | more one). */ |
79e68feb RS |
3745 | for (link = CONSTRUCTOR_ELTS (exp); |
3746 | link; | |
3747 | link = TREE_CHAIN (link), | |
3748 | field = field ? TREE_CHAIN (field) : 0) | |
3749 | { | |
3750 | tree val = TREE_VALUE (link); | |
3181cbfd RS |
3751 | tree index = 0; |
3752 | ||
85f3d674 RK |
3753 | /* The element in a union constructor specifies the proper field |
3754 | or index. */ | |
3755 | if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE | |
3756 | || TREE_CODE (type) == QUAL_UNION_TYPE) | |
3757 | && TREE_PURPOSE (link) != 0) | |
3758 | field = TREE_PURPOSE (link); | |
3181cbfd | 3759 | |
85f3d674 | 3760 | else if (TREE_CODE (type) == ARRAY_TYPE) |
3181cbfd RS |
3761 | index = TREE_PURPOSE (link); |
3762 | ||
907393db | 3763 | #ifdef ASM_COMMENT_START |
bce988a2 AH |
3764 | if (field && flag_verbose_asm) |
3765 | fprintf (asm_out_file, "%s %s:\n", | |
3766 | ASM_COMMENT_START, | |
3767 | DECL_NAME (field) | |
3768 | ? IDENTIFIER_POINTER (DECL_NAME (field)) | |
3769 | : "<anonymous>"); | |
907393db | 3770 | #endif |
bce988a2 | 3771 | |
79e68feb | 3772 | /* Eliminate the marker that makes a cast not be an lvalue. */ |
d964285c CH |
3773 | if (val != 0) |
3774 | STRIP_NOPS (val); | |
79e68feb | 3775 | |
8311a11f PB |
3776 | if (index && TREE_CODE (index) == RANGE_EXPR) |
3777 | { | |
bf1aaf0a | 3778 | unsigned HOST_WIDE_INT fieldsize |
85f3d674 RK |
3779 | = int_size_in_bytes (TREE_TYPE (type)); |
3780 | HOST_WIDE_INT lo_index = tree_low_cst (TREE_OPERAND (index, 0), 0); | |
3781 | HOST_WIDE_INT hi_index = tree_low_cst (TREE_OPERAND (index, 1), 0); | |
8311a11f | 3782 | HOST_WIDE_INT index; |
c8af3574 | 3783 | unsigned int align2 = min_align (align, fieldsize * BITS_PER_UNIT); |
85f3d674 | 3784 | |
8311a11f PB |
3785 | for (index = lo_index; index <= hi_index; index++) |
3786 | { | |
3787 | /* Output the element's initial value. */ | |
3788 | if (val == 0) | |
3789 | assemble_zeros (fieldsize); | |
3790 | else | |
c8af3574 | 3791 | output_constant (val, fieldsize, align2); |
8311a11f PB |
3792 | |
3793 | /* Count its size. */ | |
3794 | total_bytes += fieldsize; | |
3795 | } | |
3796 | } | |
3797 | else if (field == 0 || !DECL_BIT_FIELD (field)) | |
79e68feb | 3798 | { |
3181cbfd RS |
3799 | /* An element that is not a bit-field. */ |
3800 | ||
bf1aaf0a | 3801 | unsigned HOST_WIDE_INT fieldsize; |
79e68feb RS |
3802 | /* Since this structure is static, |
3803 | we know the positions are constant. */ | |
85f3d674 | 3804 | HOST_WIDE_INT pos = field ? int_byte_position (field) : 0; |
c8af3574 | 3805 | unsigned int align2; |
770ae6cc | 3806 | |
3181cbfd | 3807 | if (index != 0) |
85f3d674 RK |
3808 | pos = (tree_low_cst (TYPE_SIZE_UNIT (TREE_TYPE (val)), 1) |
3809 | * (tree_low_cst (index, 0) - tree_low_cst (min_index, 0))); | |
79e68feb | 3810 | |
3181cbfd | 3811 | /* Output any buffered-up bit-fields preceding this element. */ |
79e68feb RS |
3812 | if (byte_buffer_in_use) |
3813 | { | |
eac50d7a | 3814 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); |
79e68feb RS |
3815 | total_bytes++; |
3816 | byte_buffer_in_use = 0; | |
3817 | } | |
3818 | ||
3819 | /* Advance to offset of this element. | |
3820 | Note no alignment needed in an array, since that is guaranteed | |
3821 | if each element has the proper size. */ | |
85f3d674 | 3822 | if ((field != 0 || index != 0) && pos != total_bytes) |
79e68feb | 3823 | { |
85f3d674 RK |
3824 | assemble_zeros (pos - total_bytes); |
3825 | total_bytes = pos; | |
79e68feb | 3826 | } |
ca2eed21 | 3827 | |
c8af3574 RH |
3828 | /* Find the alignment of this element. */ |
3829 | align2 = min_align (align, BITS_PER_UNIT * pos); | |
46f9491e | 3830 | |
79e68feb RS |
3831 | /* Determine size this element should occupy. */ |
3832 | if (field) | |
a25f1211 | 3833 | { |
ffc5c6a9 RH |
3834 | fieldsize = 0; |
3835 | ||
3836 | /* If this is an array with an unspecified upper bound, | |
3837 | the initializer determines the size. */ | |
3838 | /* ??? This ought to only checked if DECL_SIZE_UNIT is NULL, | |
3839 | but we cannot do this until the deprecated support for | |
3840 | initializing zero-length array members is removed. */ | |
3841 | if (TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE | |
3842 | && TYPE_DOMAIN (TREE_TYPE (field)) | |
3843 | && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (field)))) | |
3844 | { | |
a25f1211 | 3845 | fieldsize = array_size_for_constructor (val); |
ffc5c6a9 RH |
3846 | /* Given a non-empty initialization, this field had |
3847 | better be last. */ | |
3848 | if (fieldsize != 0 && TREE_CHAIN (field) != NULL_TREE) | |
3849 | abort (); | |
3850 | } | |
3851 | else if (DECL_SIZE_UNIT (field)) | |
3852 | { | |
3853 | /* ??? This can't be right. If the decl size overflows | |
3854 | a host integer we will silently emit no data. */ | |
3855 | if (host_integerp (DECL_SIZE_UNIT (field), 1)) | |
3856 | fieldsize = tree_low_cst (DECL_SIZE_UNIT (field), 1); | |
3857 | } | |
a25f1211 | 3858 | } |
79e68feb | 3859 | else |
85f3d674 | 3860 | fieldsize = int_size_in_bytes (TREE_TYPE (type)); |
79e68feb RS |
3861 | |
3862 | /* Output the element's initial value. */ | |
3863 | if (val == 0) | |
3864 | assemble_zeros (fieldsize); | |
3865 | else | |
c8af3574 | 3866 | output_constant (val, fieldsize, align2); |
79e68feb RS |
3867 | |
3868 | /* Count its size. */ | |
3869 | total_bytes += fieldsize; | |
3870 | } | |
3871 | else if (val != 0 && TREE_CODE (val) != INTEGER_CST) | |
3872 | error ("invalid initial value for member `%s'", | |
3873 | IDENTIFIER_POINTER (DECL_NAME (field))); | |
3874 | else | |
3875 | { | |
3876 | /* Element that is a bit-field. */ | |
3877 | ||
770ae6cc RK |
3878 | HOST_WIDE_INT next_offset = int_bit_position (field); |
3879 | HOST_WIDE_INT end_offset | |
3880 | = (next_offset + tree_low_cst (DECL_SIZE (field), 1)); | |
79e68feb RS |
3881 | |
3882 | if (val == 0) | |
3883 | val = integer_zero_node; | |
3884 | ||
3885 | /* If this field does not start in this (or, next) byte, | |
3886 | skip some bytes. */ | |
3887 | if (next_offset / BITS_PER_UNIT != total_bytes) | |
3888 | { | |
3889 | /* Output remnant of any bit field in previous bytes. */ | |
3890 | if (byte_buffer_in_use) | |
3891 | { | |
eac50d7a | 3892 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); |
79e68feb RS |
3893 | total_bytes++; |
3894 | byte_buffer_in_use = 0; | |
3895 | } | |
3896 | ||
3897 | /* If still not at proper byte, advance to there. */ | |
3898 | if (next_offset / BITS_PER_UNIT != total_bytes) | |
3899 | { | |
3900 | assemble_zeros (next_offset / BITS_PER_UNIT - total_bytes); | |
3901 | total_bytes = next_offset / BITS_PER_UNIT; | |
3902 | } | |
3903 | } | |
3904 | ||
3905 | if (! byte_buffer_in_use) | |
3906 | byte = 0; | |
3907 | ||
3908 | /* We must split the element into pieces that fall within | |
3909 | separate bytes, and combine each byte with previous or | |
3910 | following bit-fields. */ | |
3911 | ||
b4ac57ab | 3912 | /* next_offset is the offset n fbits from the beginning of |
79e68feb RS |
3913 | the structure to the next bit of this element to be processed. |
3914 | end_offset is the offset of the first bit past the end of | |
3915 | this element. */ | |
3916 | while (next_offset < end_offset) | |
3917 | { | |
3918 | int this_time; | |
e7105755 JW |
3919 | int shift; |
3920 | HOST_WIDE_INT value; | |
85f3d674 RK |
3921 | HOST_WIDE_INT next_byte = next_offset / BITS_PER_UNIT; |
3922 | HOST_WIDE_INT next_bit = next_offset % BITS_PER_UNIT; | |
79e68feb RS |
3923 | |
3924 | /* Advance from byte to byte | |
3925 | within this element when necessary. */ | |
3926 | while (next_byte != total_bytes) | |
3927 | { | |
eac50d7a | 3928 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); |
79e68feb RS |
3929 | total_bytes++; |
3930 | byte = 0; | |
3931 | } | |
3932 | ||
3933 | /* Number of bits we can process at once | |
3934 | (all part of the same byte). */ | |
3935 | this_time = MIN (end_offset - next_offset, | |
3936 | BITS_PER_UNIT - next_bit); | |
f76b9db2 | 3937 | if (BYTES_BIG_ENDIAN) |
79e68feb | 3938 | { |
f76b9db2 ILT |
3939 | /* On big-endian machine, take the most significant bits |
3940 | first (of the bits that are significant) | |
3941 | and put them into bytes from the most significant end. */ | |
3942 | shift = end_offset - next_offset - this_time; | |
85f3d674 | 3943 | |
f76b9db2 | 3944 | /* Don't try to take a bunch of bits that cross |
dfb2c079 HB |
3945 | the word boundary in the INTEGER_CST. We can |
3946 | only select bits from the LOW or HIGH part | |
3947 | not from both. */ | |
f76b9db2 ILT |
3948 | if (shift < HOST_BITS_PER_WIDE_INT |
3949 | && shift + this_time > HOST_BITS_PER_WIDE_INT) | |
3950 | { | |
8b1cb95b GK |
3951 | this_time = shift + this_time - HOST_BITS_PER_WIDE_INT; |
3952 | shift = HOST_BITS_PER_WIDE_INT; | |
f76b9db2 ILT |
3953 | } |
3954 | ||
3955 | /* Now get the bits from the appropriate constant word. */ | |
3956 | if (shift < HOST_BITS_PER_WIDE_INT) | |
85f3d674 | 3957 | value = TREE_INT_CST_LOW (val); |
f76b9db2 ILT |
3958 | else if (shift < 2 * HOST_BITS_PER_WIDE_INT) |
3959 | { | |
3960 | value = TREE_INT_CST_HIGH (val); | |
3961 | shift -= HOST_BITS_PER_WIDE_INT; | |
3962 | } | |
3963 | else | |
3964 | abort (); | |
85f3d674 | 3965 | |
dfb2c079 HB |
3966 | /* Get the result. This works only when: |
3967 | 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */ | |
f76b9db2 | 3968 | byte |= (((value >> shift) |
dfb2c079 | 3969 | & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1)) |
f76b9db2 | 3970 | << (BITS_PER_UNIT - this_time - next_bit)); |
79e68feb RS |
3971 | } |
3972 | else | |
79e68feb | 3973 | { |
f76b9db2 ILT |
3974 | /* On little-endian machines, |
3975 | take first the least significant bits of the value | |
3976 | and pack them starting at the least significant | |
3977 | bits of the bytes. */ | |
770ae6cc RK |
3978 | shift = next_offset - int_bit_position (field); |
3979 | ||
f76b9db2 | 3980 | /* Don't try to take a bunch of bits that cross |
dfb2c079 HB |
3981 | the word boundary in the INTEGER_CST. We can |
3982 | only select bits from the LOW or HIGH part | |
3983 | not from both. */ | |
f76b9db2 ILT |
3984 | if (shift < HOST_BITS_PER_WIDE_INT |
3985 | && shift + this_time > HOST_BITS_PER_WIDE_INT) | |
770ae6cc | 3986 | this_time = (HOST_BITS_PER_WIDE_INT - shift); |
f76b9db2 ILT |
3987 | |
3988 | /* Now get the bits from the appropriate constant word. */ | |
e9a25f70 | 3989 | if (shift < HOST_BITS_PER_WIDE_INT) |
f76b9db2 ILT |
3990 | value = TREE_INT_CST_LOW (val); |
3991 | else if (shift < 2 * HOST_BITS_PER_WIDE_INT) | |
3992 | { | |
3993 | value = TREE_INT_CST_HIGH (val); | |
3994 | shift -= HOST_BITS_PER_WIDE_INT; | |
3995 | } | |
3996 | else | |
3997 | abort (); | |
770ae6cc | 3998 | |
dfb2c079 HB |
3999 | /* Get the result. This works only when: |
4000 | 1 <= this_time <= HOST_BITS_PER_WIDE_INT. */ | |
f76b9db2 | 4001 | byte |= (((value >> shift) |
dfb2c079 | 4002 | & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1)) |
f76b9db2 | 4003 | << next_bit); |
79e68feb | 4004 | } |
85f3d674 | 4005 | |
79e68feb RS |
4006 | next_offset += this_time; |
4007 | byte_buffer_in_use = 1; | |
4008 | } | |
4009 | } | |
4010 | } | |
85f3d674 | 4011 | |
79e68feb RS |
4012 | if (byte_buffer_in_use) |
4013 | { | |
eac50d7a | 4014 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); |
79e68feb RS |
4015 | total_bytes++; |
4016 | } | |
85f3d674 | 4017 | |
58e15542 | 4018 | if ((unsigned HOST_WIDE_INT)total_bytes < size) |
79e68feb RS |
4019 | assemble_zeros (size - total_bytes); |
4020 | } | |
ca695ac9 | 4021 | |
ecb0eece | 4022 | /* This TREE_LIST contains any weak symbol declarations waiting |
46f9491e | 4023 | to be emitted. */ |
e2500fed | 4024 | static GTY(()) tree weak_decls; |
0e9264a2 | 4025 | |
f90bf7ca MM |
4026 | /* Mark DECL as weak. */ |
4027 | ||
4028 | static void | |
2e1eedd6 | 4029 | mark_weak (tree decl) |
f90bf7ca MM |
4030 | { |
4031 | DECL_WEAK (decl) = 1; | |
4032 | ||
4033 | if (DECL_RTL_SET_P (decl) | |
3c0cb5de | 4034 | && MEM_P (DECL_RTL (decl)) |
f90bf7ca MM |
4035 | && XEXP (DECL_RTL (decl), 0) |
4036 | && GET_CODE (XEXP (DECL_RTL (decl), 0)) == SYMBOL_REF) | |
4037 | SYMBOL_REF_WEAK (XEXP (DECL_RTL (decl), 0)) = 1; | |
4038 | } | |
41077ce4 | 4039 | |
45806a3f FS |
4040 | /* Merge weak status between NEWDECL and OLDDECL. */ |
4041 | ||
4042 | void | |
2e1eedd6 | 4043 | merge_weak (tree newdecl, tree olddecl) |
45806a3f | 4044 | { |
45806a3f FS |
4045 | if (DECL_WEAK (newdecl) == DECL_WEAK (olddecl)) |
4046 | return; | |
4047 | ||
f90bf7ca MM |
4048 | if (DECL_WEAK (newdecl)) |
4049 | { | |
4050 | tree wd; | |
41077ce4 | 4051 | |
f90bf7ca MM |
4052 | /* NEWDECL is weak, but OLDDECL is not. */ |
4053 | ||
4054 | /* If we already output the OLDDECL, we're in trouble; we can't | |
4055 | go back and make it weak. This error cannot caught in | |
4056 | declare_weak because the NEWDECL and OLDDECL was not yet | |
4057 | been merged; therefore, TREE_ASM_WRITTEN was not set. */ | |
14285ace | 4058 | if (TREE_ASM_WRITTEN (olddecl)) |
ddd2d57e RH |
4059 | error ("%Jweak declaration of '%D' must precede definition", |
4060 | newdecl, newdecl); | |
14285ace RH |
4061 | |
4062 | /* If we've already generated rtl referencing OLDDECL, we may | |
4063 | have done so in a way that will not function properly with | |
4064 | a weak symbol. */ | |
4065 | else if (TREE_USED (olddecl) | |
34fb9ba5 | 4066 | && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (olddecl))) |
ddd2d57e RH |
4067 | warning ("%Jweak declaration of '%D' after first use results " |
4068 | "in unspecified behavior", newdecl, newdecl); | |
14285ace | 4069 | |
f90bf7ca MM |
4070 | if (SUPPORTS_WEAK) |
4071 | { | |
4072 | /* We put the NEWDECL on the weak_decls list at some point. | |
4073 | Replace it with the OLDDECL. */ | |
4074 | for (wd = weak_decls; wd; wd = TREE_CHAIN (wd)) | |
4075 | if (TREE_VALUE (wd) == newdecl) | |
4076 | { | |
4077 | TREE_VALUE (wd) = olddecl; | |
4078 | break; | |
4079 | } | |
4080 | /* We may not find the entry on the list. If NEWDECL is a | |
4081 | weak alias, then we will have already called | |
4082 | globalize_decl to remove the entry; in that case, we do | |
4083 | not need to do anything. */ | |
4084 | } | |
45806a3f | 4085 | |
f90bf7ca MM |
4086 | /* Make the OLDDECL weak; it's OLDDECL that we'll be keeping. */ |
4087 | mark_weak (olddecl); | |
4088 | } | |
4089 | else | |
4090 | /* OLDDECL was weak, but NEWDECL was not explicitly marked as | |
4091 | weak. Just update NEWDECL to indicate that it's weak too. */ | |
4092 | mark_weak (newdecl); | |
45806a3f FS |
4093 | } |
4094 | ||
4b8af8d9 JM |
4095 | /* Declare DECL to be a weak symbol. */ |
4096 | ||
4097 | void | |
2e1eedd6 | 4098 | declare_weak (tree decl) |
4b8af8d9 JM |
4099 | { |
4100 | if (! TREE_PUBLIC (decl)) | |
ddd2d57e | 4101 | error ("%Jweak declaration of '%D' must be public", decl, decl); |
45806a3f | 4102 | else if (TREE_CODE (decl) == FUNCTION_DECL && TREE_ASM_WRITTEN (decl)) |
ddd2d57e | 4103 | error ("%Jweak declaration of '%D' must precede definition", decl, decl); |
daefd78b | 4104 | else if (SUPPORTS_WEAK) |
ecb0eece RH |
4105 | { |
4106 | if (! DECL_WEAK (decl)) | |
4107 | weak_decls = tree_cons (NULL, decl, weak_decls); | |
4108 | } | |
4ae08f95 | 4109 | else |
ddd2d57e | 4110 | warning ("%Jweak declaration of '%D' not supported", decl, decl); |
4ae08f95 | 4111 | |
f90bf7ca | 4112 | mark_weak (decl); |
4b8af8d9 JM |
4113 | } |
4114 | ||
4115 | /* Emit any pending weak declarations. */ | |
4116 | ||
4117 | void | |
2e1eedd6 | 4118 | weak_finish (void) |
4b8af8d9 | 4119 | { |
ecb0eece RH |
4120 | tree t; |
4121 | ||
c26fbbca | 4122 | for (t = weak_decls; t; t = TREE_CHAIN (t)) |
4b8af8d9 | 4123 | { |
ecb0eece | 4124 | tree decl = TREE_VALUE (t); |
4977bab6 ZW |
4125 | #if defined (ASM_WEAKEN_DECL) || defined (ASM_WEAKEN_LABEL) |
4126 | const char *const name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
4127 | #endif | |
ecb0eece RH |
4128 | |
4129 | if (! TREE_USED (decl)) | |
4130 | continue; | |
4131 | ||
79c4e63f | 4132 | #ifdef ASM_WEAKEN_DECL |
ecb0eece | 4133 | ASM_WEAKEN_DECL (asm_out_file, decl, name, NULL); |
4ae08f95 JM |
4134 | #else |
4135 | #ifdef ASM_WEAKEN_LABEL | |
ecb0eece RH |
4136 | ASM_WEAKEN_LABEL (asm_out_file, name); |
4137 | #else | |
4138 | #ifdef ASM_OUTPUT_WEAK_ALIAS | |
4139 | warning ("only weak aliases are supported in this configuration"); | |
4140 | return; | |
4ae08f95 | 4141 | #endif |
79c4e63f | 4142 | #endif |
4ae08f95 | 4143 | #endif |
4b8af8d9 | 4144 | } |
4b8af8d9 | 4145 | } |
4ae08f95 | 4146 | |
19c5b1cf JM |
4147 | /* Emit the assembly bits to indicate that DECL is globally visible. */ |
4148 | ||
4149 | static void | |
2e1eedd6 | 4150 | globalize_decl (tree decl) |
19c5b1cf | 4151 | { |
f9d09ae5 | 4152 | const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0); |
19c5b1cf JM |
4153 | |
4154 | #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL) | |
4155 | if (DECL_WEAK (decl)) | |
4156 | { | |
ecb0eece RH |
4157 | tree *p, t; |
4158 | ||
19c5b1cf JM |
4159 | #ifdef ASM_WEAKEN_DECL |
4160 | ASM_WEAKEN_DECL (asm_out_file, decl, name, 0); | |
4161 | #else | |
4162 | ASM_WEAKEN_LABEL (asm_out_file, name); | |
4163 | #endif | |
ecb0eece | 4164 | |
19c5b1cf JM |
4165 | /* Remove this function from the pending weak list so that |
4166 | we do not emit multiple .weak directives for it. */ | |
a81eed10 FS |
4167 | for (p = &weak_decls; (t = *p) ; ) |
4168 | { | |
4169 | if (DECL_ASSEMBLER_NAME (decl) == DECL_ASSEMBLER_NAME (TREE_VALUE (t))) | |
ecb0eece | 4170 | *p = TREE_CHAIN (t); |
a81eed10 FS |
4171 | else |
4172 | p = &TREE_CHAIN (t); | |
4173 | } | |
19c5b1cf JM |
4174 | return; |
4175 | } | |
4746cf84 MA |
4176 | #elif defined(ASM_MAKE_LABEL_LINKONCE) |
4177 | if (DECL_ONE_ONLY (decl)) | |
4178 | ASM_MAKE_LABEL_LINKONCE (asm_out_file, name); | |
19c5b1cf | 4179 | #endif |
ecb0eece | 4180 | |
5fd9b178 | 4181 | targetm.asm_out.globalize_label (asm_out_file, name); |
19c5b1cf JM |
4182 | } |
4183 | ||
4ae08f95 JM |
4184 | /* Emit an assembler directive to make the symbol for DECL an alias to |
4185 | the symbol for TARGET. */ | |
4b8af8d9 JM |
4186 | |
4187 | void | |
2e1eedd6 | 4188 | assemble_alias (tree decl, tree target ATTRIBUTE_UNUSED) |
4b8af8d9 | 4189 | { |
3cce094d | 4190 | const char *name; |
4b8af8d9 | 4191 | |
9ea07fd0 JW |
4192 | /* We must force creation of DECL_RTL for debug info generation, even though |
4193 | we don't use it here. */ | |
6496a589 | 4194 | make_decl_rtl (decl, NULL); |
9ea07fd0 | 4195 | |
19e7881c | 4196 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); |
4b8af8d9 | 4197 | |
4927276d | 4198 | #ifdef ASM_OUTPUT_DEF |
4b8af8d9 JM |
4199 | /* Make name accessible from other files, if appropriate. */ |
4200 | ||
4201 | if (TREE_PUBLIC (decl)) | |
4202 | { | |
19c5b1cf | 4203 | globalize_decl (decl); |
b14707c3 | 4204 | maybe_assemble_visibility (decl); |
4b8af8d9 JM |
4205 | } |
4206 | ||
e4faf1eb NC |
4207 | #ifdef ASM_OUTPUT_DEF_FROM_DECLS |
4208 | ASM_OUTPUT_DEF_FROM_DECLS (asm_out_file, decl, target); | |
4209 | #else | |
4b8af8d9 | 4210 | ASM_OUTPUT_DEF (asm_out_file, name, IDENTIFIER_POINTER (target)); |
e4faf1eb | 4211 | #endif |
79c4e63f AM |
4212 | #else /* !ASM_OUTPUT_DEF */ |
4213 | #if defined (ASM_OUTPUT_WEAK_ALIAS) || defined (ASM_WEAKEN_DECL) | |
06e4eab5 RS |
4214 | if (DECL_WEAK (decl)) |
4215 | { | |
4216 | tree *p, t; | |
79c4e63f | 4217 | #ifdef ASM_WEAKEN_DECL |
06e4eab5 | 4218 | ASM_WEAKEN_DECL (asm_out_file, decl, name, IDENTIFIER_POINTER (target)); |
79c4e63f | 4219 | #else |
06e4eab5 | 4220 | ASM_OUTPUT_WEAK_ALIAS (asm_out_file, name, IDENTIFIER_POINTER (target)); |
79c4e63f | 4221 | #endif |
06e4eab5 RS |
4222 | /* Remove this function from the pending weak list so that |
4223 | we do not emit multiple .weak directives for it. */ | |
4224 | for (p = &weak_decls; (t = *p) ; ) | |
4225 | if (DECL_ASSEMBLER_NAME (decl) | |
4226 | == DECL_ASSEMBLER_NAME (TREE_VALUE (t))) | |
4227 | *p = TREE_CHAIN (t); | |
4228 | else | |
4229 | p = &TREE_CHAIN (t); | |
4230 | } | |
4231 | else | |
4232 | warning ("only weak aliases are supported in this configuration"); | |
4233 | ||
4927276d JM |
4234 | #else |
4235 | warning ("alias definitions not supported in this configuration; ignored"); | |
4236 | #endif | |
4b8af8d9 | 4237 | #endif |
14285ace RH |
4238 | |
4239 | TREE_USED (decl) = 1; | |
4240 | TREE_ASM_WRITTEN (decl) = 1; | |
4241 | TREE_ASM_WRITTEN (DECL_ASSEMBLER_NAME (decl)) = 1; | |
4b8af8d9 | 4242 | } |
f796d997 | 4243 | |
47bd70b5 | 4244 | /* Emit an assembler directive to set symbol for DECL visibility to |
25fdb4dc | 4245 | the visibility type VIS, which must not be VISIBILITY_DEFAULT. */ |
47bd70b5 JJ |
4246 | |
4247 | void | |
2e1eedd6 | 4248 | default_assemble_visibility (tree decl, int vis) |
47bd70b5 | 4249 | { |
25fdb4dc RH |
4250 | static const char * const visibility_types[] = { |
4251 | NULL, "internal", "hidden", "protected" | |
4252 | }; | |
4253 | ||
4254 | const char *name, *type; | |
47bd70b5 | 4255 | |
267594f3 | 4256 | name = (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))); |
25fdb4dc | 4257 | type = visibility_types[vis]; |
47bd70b5 JJ |
4258 | |
4259 | #ifdef HAVE_GAS_HIDDEN | |
267594f3 R |
4260 | fprintf (asm_out_file, "\t.%s\t", type); |
4261 | assemble_name (asm_out_file, name); | |
4262 | fprintf (asm_out_file, "\n"); | |
47bd70b5 JJ |
4263 | #else |
4264 | warning ("visibility attribute not supported in this configuration; ignored"); | |
4265 | #endif | |
4266 | } | |
4267 | ||
b14707c3 RH |
4268 | /* A helper function to call assemble_visibility when needed for a decl. */ |
4269 | ||
4270 | static void | |
2e1eedd6 | 4271 | maybe_assemble_visibility (tree decl) |
b14707c3 | 4272 | { |
968b41a1 | 4273 | enum symbol_visibility vis = DECL_VISIBILITY (decl); |
25fdb4dc RH |
4274 | |
4275 | if (vis != VISIBILITY_DEFAULT) | |
245f1bfa | 4276 | targetm.asm_out.visibility (decl, vis); |
b14707c3 RH |
4277 | } |
4278 | ||
f796d997 JM |
4279 | /* Returns 1 if the target configuration supports defining public symbols |
4280 | so that one of them will be chosen at link time instead of generating a | |
4281 | multiply-defined symbol error, whether through the use of weak symbols or | |
4282 | a target-specific mechanism for having duplicates discarded. */ | |
4283 | ||
4284 | int | |
2e1eedd6 | 4285 | supports_one_only (void) |
f796d997 JM |
4286 | { |
4287 | if (SUPPORTS_ONE_ONLY) | |
4288 | return 1; | |
4289 | return SUPPORTS_WEAK; | |
4290 | } | |
4291 | ||
4292 | /* Set up DECL as a public symbol that can be defined in multiple | |
4293 | translation units without generating a linker error. */ | |
4294 | ||
4295 | void | |
2e1eedd6 | 4296 | make_decl_one_only (tree decl) |
f796d997 JM |
4297 | { |
4298 | if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL) | |
4299 | abort (); | |
4300 | ||
4301 | TREE_PUBLIC (decl) = 1; | |
4302 | ||
4746cf84 | 4303 | if (SUPPORTS_ONE_ONLY) |
f796d997 JM |
4304 | { |
4305 | #ifdef MAKE_DECL_ONE_ONLY | |
4306 | MAKE_DECL_ONE_ONLY (decl); | |
4307 | #endif | |
4308 | DECL_ONE_ONLY (decl) = 1; | |
4309 | } | |
4746cf84 MA |
4310 | else if (TREE_CODE (decl) == VAR_DECL |
4311 | && (DECL_INITIAL (decl) == 0 || DECL_INITIAL (decl) == error_mark_node)) | |
4312 | DECL_COMMON (decl) = 1; | |
f796d997 | 4313 | else if (SUPPORTS_WEAK) |
7d4444ea | 4314 | DECL_WEAK (decl) = 1; |
f796d997 JM |
4315 | else |
4316 | abort (); | |
4317 | } | |
76095e2f RH |
4318 | |
4319 | void | |
2e1eedd6 | 4320 | init_varasm_once (void) |
76095e2f | 4321 | { |
17211ab5 GK |
4322 | in_named_htab = htab_create_ggc (31, in_named_entry_hash, |
4323 | in_named_entry_eq, NULL); | |
10b6a274 ZW |
4324 | const_desc_htab = htab_create_ggc (1009, const_desc_hash, |
4325 | const_desc_eq, NULL); | |
715bdd29 | 4326 | |
a79e3a45 | 4327 | const_alias_set = new_alias_set (); |
76095e2f | 4328 | } |
7c262518 | 4329 | |
dce81a1a | 4330 | enum tls_model |
2e1eedd6 | 4331 | decl_tls_model (tree decl) |
dce81a1a JJ |
4332 | { |
4333 | enum tls_model kind; | |
4334 | tree attr = lookup_attribute ("tls_model", DECL_ATTRIBUTES (decl)); | |
4335 | bool is_local; | |
4336 | ||
4337 | if (attr) | |
4338 | { | |
4339 | attr = TREE_VALUE (TREE_VALUE (attr)); | |
4340 | if (TREE_CODE (attr) != STRING_CST) | |
4341 | abort (); | |
4342 | if (!strcmp (TREE_STRING_POINTER (attr), "local-exec")) | |
4343 | kind = TLS_MODEL_LOCAL_EXEC; | |
4344 | else if (!strcmp (TREE_STRING_POINTER (attr), "initial-exec")) | |
4345 | kind = TLS_MODEL_INITIAL_EXEC; | |
4346 | else if (!strcmp (TREE_STRING_POINTER (attr), "local-dynamic")) | |
4347 | kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC; | |
4348 | else if (!strcmp (TREE_STRING_POINTER (attr), "global-dynamic")) | |
4349 | kind = TLS_MODEL_GLOBAL_DYNAMIC; | |
4350 | else | |
4351 | abort (); | |
4352 | return kind; | |
4353 | } | |
4354 | ||
5fd9b178 | 4355 | is_local = targetm.binds_local_p (decl); |
dce81a1a JJ |
4356 | if (!flag_pic) |
4357 | { | |
4358 | if (is_local) | |
4359 | kind = TLS_MODEL_LOCAL_EXEC; | |
4360 | else | |
4361 | kind = TLS_MODEL_INITIAL_EXEC; | |
4362 | } | |
4363 | /* Local dynamic is inefficient when we're not combining the | |
4364 | parts of the address. */ | |
4365 | else if (optimize && is_local) | |
4366 | kind = TLS_MODEL_LOCAL_DYNAMIC; | |
4367 | else | |
4368 | kind = TLS_MODEL_GLOBAL_DYNAMIC; | |
4369 | if (kind < flag_tls_default) | |
4370 | kind = flag_tls_default; | |
4371 | ||
4372 | return kind; | |
4373 | } | |
4374 | ||
7c262518 RH |
4375 | /* Select a set of attributes for section NAME based on the properties |
4376 | of DECL and whether or not RELOC indicates that DECL's initializer | |
4377 | might contain runtime relocations. | |
4378 | ||
4379 | We make the section read-only and executable for a function decl, | |
715bdd29 | 4380 | read-only for a const data decl, and writable for a non-const data decl. */ |
7c262518 RH |
4381 | |
4382 | unsigned int | |
2e1eedd6 | 4383 | default_section_type_flags (tree decl, const char *name, int reloc) |
2cc9fb4c DE |
4384 | { |
4385 | return default_section_type_flags_1 (decl, name, reloc, flag_pic); | |
4386 | } | |
4387 | ||
4388 | unsigned int | |
2e1eedd6 AJ |
4389 | default_section_type_flags_1 (tree decl, const char *name, int reloc, |
4390 | int shlib) | |
7c262518 | 4391 | { |
7c262518 | 4392 | unsigned int flags; |
7c262518 RH |
4393 | |
4394 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) | |
4395 | flags = SECTION_CODE; | |
2cc9fb4c | 4396 | else if (decl && decl_readonly_section_1 (decl, reloc, shlib)) |
7c262518 | 4397 | flags = 0; |
750054a2 CT |
4398 | else if (strcmp (name, UNLIKELY_EXECUTED_TEXT_SECTION_NAME) == 0) |
4399 | flags = SECTION_CODE; | |
7c262518 RH |
4400 | else |
4401 | flags = SECTION_WRITE; | |
4402 | ||
4403 | if (decl && DECL_ONE_ONLY (decl)) | |
4404 | flags |= SECTION_LINKONCE; | |
4405 | ||
6f001fdf | 4406 | if (decl && TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL (decl)) |
c711ba8e RH |
4407 | flags |= SECTION_TLS | SECTION_WRITE; |
4408 | ||
7c262518 RH |
4409 | if (strcmp (name, ".bss") == 0 |
4410 | || strncmp (name, ".bss.", 5) == 0 | |
4411 | || strncmp (name, ".gnu.linkonce.b.", 16) == 0 | |
4412 | || strcmp (name, ".sbss") == 0 | |
4413 | || strncmp (name, ".sbss.", 6) == 0 | |
3d78f2e9 | 4414 | || strncmp (name, ".gnu.linkonce.sb.", 17) == 0 |
c711ba8e RH |
4415 | || strcmp (name, ".tbss") == 0 |
4416 | || strncmp (name, ".gnu.linkonce.tb.", 17) == 0) | |
7c262518 RH |
4417 | flags |= SECTION_BSS; |
4418 | ||
3d78f2e9 | 4419 | if (strcmp (name, ".tdata") == 0 |
c711ba8e RH |
4420 | || strcmp (name, ".tbss") == 0 |
4421 | || strncmp (name, ".gnu.linkonce.td.", 17) == 0 | |
4422 | || strncmp (name, ".gnu.linkonce.tb.", 17) == 0) | |
3d78f2e9 RH |
4423 | flags |= SECTION_TLS; |
4424 | ||
6a0a6ac4 AM |
4425 | /* These three sections have special ELF types. They are neither |
4426 | SHT_PROGBITS nor SHT_NOBITS, so when changing sections we don't | |
4427 | want to print a section type (@progbits or @nobits). If someone | |
4428 | is silly enough to emit code or TLS variables to one of these | |
4429 | sections, then don't handle them specially. */ | |
4430 | if (!(flags & (SECTION_CODE | SECTION_BSS | SECTION_TLS)) | |
4431 | && (strcmp (name, ".init_array") == 0 | |
4432 | || strcmp (name, ".fini_array") == 0 | |
4433 | || strcmp (name, ".preinit_array") == 0)) | |
4434 | flags |= SECTION_NOTYPE; | |
4435 | ||
7c262518 RH |
4436 | return flags; |
4437 | } | |
4438 | ||
4439 | /* Output assembly to switch to section NAME with attribute FLAGS. | |
4440 | Four variants for common object file formats. */ | |
4441 | ||
4442 | void | |
2e1eedd6 AJ |
4443 | default_no_named_section (const char *name ATTRIBUTE_UNUSED, |
4444 | unsigned int flags ATTRIBUTE_UNUSED) | |
7c262518 RH |
4445 | { |
4446 | /* Some object formats don't support named sections at all. The | |
4447 | front-end should already have flagged this as an error. */ | |
4448 | abort (); | |
4449 | } | |
4450 | ||
4451 | void | |
2e1eedd6 | 4452 | default_elf_asm_named_section (const char *name, unsigned int flags) |
7c262518 | 4453 | { |
201556f0 | 4454 | char flagchars[10], *f = flagchars; |
7c262518 | 4455 | |
a8c01a59 RL |
4456 | if (! named_section_first_declaration (name)) |
4457 | { | |
4458 | fprintf (asm_out_file, "\t.section\t%s\n", name); | |
4459 | return; | |
4460 | } | |
4461 | ||
7c262518 RH |
4462 | if (!(flags & SECTION_DEBUG)) |
4463 | *f++ = 'a'; | |
4464 | if (flags & SECTION_WRITE) | |
4465 | *f++ = 'w'; | |
4466 | if (flags & SECTION_CODE) | |
4467 | *f++ = 'x'; | |
4468 | if (flags & SECTION_SMALL) | |
4469 | *f++ = 's'; | |
201556f0 JJ |
4470 | if (flags & SECTION_MERGE) |
4471 | *f++ = 'M'; | |
4472 | if (flags & SECTION_STRINGS) | |
4473 | *f++ = 'S'; | |
3d78f2e9 RH |
4474 | if (flags & SECTION_TLS) |
4475 | *f++ = 'T'; | |
7c262518 RH |
4476 | *f = '\0'; |
4477 | ||
6a0a6ac4 | 4478 | fprintf (asm_out_file, "\t.section\t%s,\"%s\"", name, flagchars); |
7c262518 | 4479 | |
6a0a6ac4 AM |
4480 | if (!(flags & SECTION_NOTYPE)) |
4481 | { | |
4482 | const char *type; | |
4483 | ||
4484 | if (flags & SECTION_BSS) | |
4485 | type = "nobits"; | |
4486 | else | |
4487 | type = "progbits"; | |
4488 | ||
4489 | fprintf (asm_out_file, ",@%s", type); | |
4490 | ||
4491 | if (flags & SECTION_ENTSIZE) | |
4492 | fprintf (asm_out_file, ",%d", flags & SECTION_ENTSIZE); | |
4493 | } | |
4494 | ||
4495 | putc ('\n', asm_out_file); | |
7c262518 RH |
4496 | } |
4497 | ||
4498 | void | |
2e1eedd6 | 4499 | default_coff_asm_named_section (const char *name, unsigned int flags) |
7c262518 RH |
4500 | { |
4501 | char flagchars[8], *f = flagchars; | |
4502 | ||
4503 | if (flags & SECTION_WRITE) | |
4504 | *f++ = 'w'; | |
4505 | if (flags & SECTION_CODE) | |
4506 | *f++ = 'x'; | |
4507 | *f = '\0'; | |
4508 | ||
4509 | fprintf (asm_out_file, "\t.section\t%s,\"%s\"\n", name, flagchars); | |
4510 | } | |
4511 | ||
4512 | void | |
2e1eedd6 | 4513 | default_pe_asm_named_section (const char *name, unsigned int flags) |
7c262518 | 4514 | { |
715bdd29 | 4515 | default_coff_asm_named_section (name, flags); |
7c262518 RH |
4516 | |
4517 | if (flags & SECTION_LINKONCE) | |
4518 | { | |
4519 | /* Functions may have been compiled at various levels of | |
4520 | optimization so we can't use `same_size' here. | |
4521 | Instead, have the linker pick one. */ | |
4522 | fprintf (asm_out_file, "\t.linkonce %s\n", | |
4523 | (flags & SECTION_CODE ? "discard" : "same_size")); | |
4524 | } | |
4525 | } | |
4a8d0c9c | 4526 | \f |
ae46c4e0 RH |
4527 | /* The lame default section selector. */ |
4528 | ||
4529 | void | |
2e1eedd6 AJ |
4530 | default_select_section (tree decl, int reloc, |
4531 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
ae46c4e0 RH |
4532 | { |
4533 | bool readonly = false; | |
4534 | ||
4535 | if (DECL_P (decl)) | |
4536 | { | |
4e4d733e | 4537 | if (decl_readonly_section (decl, reloc)) |
ae46c4e0 RH |
4538 | readonly = true; |
4539 | } | |
4540 | else if (TREE_CODE (decl) == CONSTRUCTOR) | |
4541 | { | |
4542 | if (! ((flag_pic && reloc) | |
4543 | || !TREE_READONLY (decl) | |
4544 | || TREE_SIDE_EFFECTS (decl) | |
4545 | || !TREE_CONSTANT (decl))) | |
4546 | readonly = true; | |
4547 | } | |
4548 | else if (TREE_CODE (decl) == STRING_CST) | |
3521b33c | 4549 | readonly = true; |
ae46c4e0 RH |
4550 | else if (! (flag_pic && reloc)) |
4551 | readonly = true; | |
4552 | ||
4553 | if (readonly) | |
4554 | readonly_data_section (); | |
4555 | else | |
4556 | data_section (); | |
4557 | } | |
4558 | ||
4559 | /* A helper function for default_elf_select_section and | |
4560 | default_elf_unique_section. Categorizes the DECL. */ | |
4561 | ||
4562 | enum section_category | |
4563 | { | |
4564 | SECCAT_TEXT, | |
4565 | ||
4566 | SECCAT_RODATA, | |
4567 | SECCAT_RODATA_MERGE_STR, | |
4568 | SECCAT_RODATA_MERGE_STR_INIT, | |
4569 | SECCAT_RODATA_MERGE_CONST, | |
275b6d80 | 4570 | SECCAT_SRODATA, |
ae46c4e0 RH |
4571 | |
4572 | SECCAT_DATA, | |
4573 | ||
4574 | /* To optimize loading of shared programs, define following subsections | |
4575 | of data section: | |
4576 | _REL Contains data that has relocations, so they get grouped | |
4577 | together and dynamic linker will visit fewer pages in memory. | |
4578 | _RO Contains data that is otherwise read-only. This is useful | |
4579 | with prelinking as most relocations won't be dynamically | |
4580 | linked and thus stay read only. | |
4581 | _LOCAL Marks data containing relocations only to local objects. | |
4582 | These relocations will get fully resolved by prelinking. */ | |
4583 | SECCAT_DATA_REL, | |
4584 | SECCAT_DATA_REL_LOCAL, | |
4585 | SECCAT_DATA_REL_RO, | |
4586 | SECCAT_DATA_REL_RO_LOCAL, | |
4587 | ||
4588 | SECCAT_SDATA, | |
4589 | SECCAT_TDATA, | |
4590 | ||
4591 | SECCAT_BSS, | |
4592 | SECCAT_SBSS, | |
4593 | SECCAT_TBSS | |
4594 | }; | |
4595 | ||
2cc9fb4c | 4596 | static enum section_category |
2e1eedd6 | 4597 | categorize_decl_for_section (tree, int, int); |
ae46c4e0 RH |
4598 | |
4599 | static enum section_category | |
2e1eedd6 | 4600 | categorize_decl_for_section (tree decl, int reloc, int shlib) |
ae46c4e0 RH |
4601 | { |
4602 | enum section_category ret; | |
4603 | ||
4604 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
4605 | return SECCAT_TEXT; | |
4606 | else if (TREE_CODE (decl) == STRING_CST) | |
6de9cd9a DN |
4607 | { |
4608 | if (flag_mudflap) /* or !flag_merge_constants */ | |
4609 | return SECCAT_RODATA; | |
4610 | else | |
4611 | return SECCAT_RODATA_MERGE_STR; | |
4612 | } | |
ae46c4e0 RH |
4613 | else if (TREE_CODE (decl) == VAR_DECL) |
4614 | { | |
4615 | if (DECL_INITIAL (decl) == NULL | |
08a8c6b6 JB |
4616 | || DECL_INITIAL (decl) == error_mark_node |
4617 | || (flag_zero_initialized_in_bss | |
4618 | /* Leave constant zeroes in .rodata so they can be shared. */ | |
4619 | && !TREE_READONLY (decl) | |
4620 | && initializer_zerop (DECL_INITIAL (decl)))) | |
ae46c4e0 RH |
4621 | ret = SECCAT_BSS; |
4622 | else if (! TREE_READONLY (decl) | |
4623 | || TREE_SIDE_EFFECTS (decl) | |
4624 | || ! TREE_CONSTANT (DECL_INITIAL (decl))) | |
4625 | { | |
2cc9fb4c | 4626 | if (shlib && (reloc & 2)) |
ae46c4e0 | 4627 | ret = SECCAT_DATA_REL; |
2cc9fb4c | 4628 | else if (shlib && reloc) |
ae46c4e0 RH |
4629 | ret = SECCAT_DATA_REL_LOCAL; |
4630 | else | |
4631 | ret = SECCAT_DATA; | |
4632 | } | |
2cc9fb4c | 4633 | else if (shlib && (reloc & 2)) |
ae46c4e0 | 4634 | ret = SECCAT_DATA_REL_RO; |
2cc9fb4c | 4635 | else if (shlib && reloc) |
ae46c4e0 | 4636 | ret = SECCAT_DATA_REL_RO_LOCAL; |
7eca317a | 4637 | else if (reloc || flag_merge_constants < 2) |
ae46c4e0 RH |
4638 | /* C and C++ don't allow different variables to share the same |
4639 | location. -fmerge-all-constants allows even that (at the | |
4640 | expense of not conforming). */ | |
4641 | ret = SECCAT_RODATA; | |
4642 | else if (TREE_CODE (DECL_INITIAL (decl)) == STRING_CST) | |
4643 | ret = SECCAT_RODATA_MERGE_STR_INIT; | |
4644 | else | |
4645 | ret = SECCAT_RODATA_MERGE_CONST; | |
4646 | } | |
4647 | else if (TREE_CODE (decl) == CONSTRUCTOR) | |
4648 | { | |
2cc9fb4c | 4649 | if ((shlib && reloc) |
ae46c4e0 RH |
4650 | || TREE_SIDE_EFFECTS (decl) |
4651 | || ! TREE_CONSTANT (decl)) | |
4652 | ret = SECCAT_DATA; | |
4653 | else | |
4654 | ret = SECCAT_RODATA; | |
4655 | } | |
4656 | else | |
4657 | ret = SECCAT_RODATA; | |
4658 | ||
3d78f2e9 RH |
4659 | /* There are no read-only thread-local sections. */ |
4660 | if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL (decl)) | |
4661 | { | |
08a8c6b6 JB |
4662 | /* Note that this would be *just* SECCAT_BSS, except that there's |
4663 | no concept of a read-only thread-local-data section. */ | |
4664 | if (ret == SECCAT_BSS | |
4665 | || (flag_zero_initialized_in_bss | |
4666 | && initializer_zerop (DECL_INITIAL (decl)))) | |
3d78f2e9 RH |
4667 | ret = SECCAT_TBSS; |
4668 | else | |
4669 | ret = SECCAT_TDATA; | |
4670 | } | |
4671 | ||
ae46c4e0 | 4672 | /* If the target uses small data sections, select it. */ |
5fd9b178 | 4673 | else if (targetm.in_small_data_p (decl)) |
ae46c4e0 RH |
4674 | { |
4675 | if (ret == SECCAT_BSS) | |
4676 | ret = SECCAT_SBSS; | |
275b6d80 DE |
4677 | else if (targetm.have_srodata_section && ret == SECCAT_RODATA) |
4678 | ret = SECCAT_SRODATA; | |
ae46c4e0 RH |
4679 | else |
4680 | ret = SECCAT_SDATA; | |
4681 | } | |
4682 | ||
4683 | return ret; | |
4684 | } | |
4685 | ||
4e4d733e | 4686 | bool |
2e1eedd6 | 4687 | decl_readonly_section (tree decl, int reloc) |
4e4d733e | 4688 | { |
2cc9fb4c DE |
4689 | return decl_readonly_section_1 (decl, reloc, flag_pic); |
4690 | } | |
4691 | ||
4692 | bool | |
2e1eedd6 | 4693 | decl_readonly_section_1 (tree decl, int reloc, int shlib) |
2cc9fb4c DE |
4694 | { |
4695 | switch (categorize_decl_for_section (decl, reloc, shlib)) | |
4e4d733e L |
4696 | { |
4697 | case SECCAT_RODATA: | |
4698 | case SECCAT_RODATA_MERGE_STR: | |
4699 | case SECCAT_RODATA_MERGE_STR_INIT: | |
4700 | case SECCAT_RODATA_MERGE_CONST: | |
275b6d80 | 4701 | case SECCAT_SRODATA: |
4e4d733e L |
4702 | return true; |
4703 | break; | |
4704 | default: | |
4705 | return false; | |
4706 | break; | |
4707 | } | |
4708 | } | |
4709 | ||
ae46c4e0 RH |
4710 | /* Select a section based on the above categorization. */ |
4711 | ||
4712 | void | |
2e1eedd6 AJ |
4713 | default_elf_select_section (tree decl, int reloc, |
4714 | unsigned HOST_WIDE_INT align) | |
ae46c4e0 | 4715 | { |
2cc9fb4c DE |
4716 | default_elf_select_section_1 (decl, reloc, align, flag_pic); |
4717 | } | |
4718 | ||
4719 | void | |
2e1eedd6 AJ |
4720 | default_elf_select_section_1 (tree decl, int reloc, |
4721 | unsigned HOST_WIDE_INT align, int shlib) | |
2cc9fb4c DE |
4722 | { |
4723 | switch (categorize_decl_for_section (decl, reloc, shlib)) | |
ae46c4e0 RH |
4724 | { |
4725 | case SECCAT_TEXT: | |
4726 | /* We're not supposed to be called on FUNCTION_DECLs. */ | |
4727 | abort (); | |
4728 | case SECCAT_RODATA: | |
4729 | readonly_data_section (); | |
4730 | break; | |
4731 | case SECCAT_RODATA_MERGE_STR: | |
4732 | mergeable_string_section (decl, align, 0); | |
4733 | break; | |
4734 | case SECCAT_RODATA_MERGE_STR_INIT: | |
4735 | mergeable_string_section (DECL_INITIAL (decl), align, 0); | |
4736 | break; | |
4737 | case SECCAT_RODATA_MERGE_CONST: | |
4738 | mergeable_constant_section (DECL_MODE (decl), align, 0); | |
4739 | break; | |
275b6d80 DE |
4740 | case SECCAT_SRODATA: |
4741 | named_section (NULL_TREE, ".sdata2", reloc); | |
4742 | break; | |
ae46c4e0 RH |
4743 | case SECCAT_DATA: |
4744 | data_section (); | |
4745 | break; | |
4746 | case SECCAT_DATA_REL: | |
4747 | named_section (NULL_TREE, ".data.rel", reloc); | |
4748 | break; | |
4749 | case SECCAT_DATA_REL_LOCAL: | |
4750 | named_section (NULL_TREE, ".data.rel.local", reloc); | |
4751 | break; | |
4752 | case SECCAT_DATA_REL_RO: | |
4753 | named_section (NULL_TREE, ".data.rel.ro", reloc); | |
4754 | break; | |
4755 | case SECCAT_DATA_REL_RO_LOCAL: | |
4756 | named_section (NULL_TREE, ".data.rel.ro.local", reloc); | |
4757 | break; | |
4758 | case SECCAT_SDATA: | |
4759 | named_section (NULL_TREE, ".sdata", reloc); | |
4760 | break; | |
4761 | case SECCAT_TDATA: | |
4762 | named_section (NULL_TREE, ".tdata", reloc); | |
4763 | break; | |
4764 | case SECCAT_BSS: | |
4765 | #ifdef BSS_SECTION_ASM_OP | |
4766 | bss_section (); | |
4767 | #else | |
4768 | named_section (NULL_TREE, ".bss", reloc); | |
4769 | #endif | |
4770 | break; | |
4771 | case SECCAT_SBSS: | |
4772 | named_section (NULL_TREE, ".sbss", reloc); | |
4773 | break; | |
4774 | case SECCAT_TBSS: | |
4775 | named_section (NULL_TREE, ".tbss", reloc); | |
4776 | break; | |
4777 | default: | |
4778 | abort (); | |
4779 | } | |
4780 | } | |
4781 | ||
41077ce4 | 4782 | /* Construct a unique section name based on the decl name and the |
ae46c4e0 RH |
4783 | categorization performed above. */ |
4784 | ||
4785 | void | |
2e1eedd6 | 4786 | default_unique_section (tree decl, int reloc) |
2cc9fb4c DE |
4787 | { |
4788 | default_unique_section_1 (decl, reloc, flag_pic); | |
4789 | } | |
4790 | ||
4791 | void | |
2e1eedd6 | 4792 | default_unique_section_1 (tree decl, int reloc, int shlib) |
ae46c4e0 RH |
4793 | { |
4794 | bool one_only = DECL_ONE_ONLY (decl); | |
4795 | const char *prefix, *name; | |
4796 | size_t nlen, plen; | |
4797 | char *string; | |
4798 | ||
2cc9fb4c | 4799 | switch (categorize_decl_for_section (decl, reloc, shlib)) |
ae46c4e0 RH |
4800 | { |
4801 | case SECCAT_TEXT: | |
4802 | prefix = one_only ? ".gnu.linkonce.t." : ".text."; | |
4803 | break; | |
4804 | case SECCAT_RODATA: | |
4805 | case SECCAT_RODATA_MERGE_STR: | |
4806 | case SECCAT_RODATA_MERGE_STR_INIT: | |
4807 | case SECCAT_RODATA_MERGE_CONST: | |
4808 | prefix = one_only ? ".gnu.linkonce.r." : ".rodata."; | |
4809 | break; | |
275b6d80 DE |
4810 | case SECCAT_SRODATA: |
4811 | prefix = one_only ? ".gnu.linkonce.s2." : ".sdata2."; | |
4812 | break; | |
ae46c4e0 RH |
4813 | case SECCAT_DATA: |
4814 | case SECCAT_DATA_REL: | |
4815 | case SECCAT_DATA_REL_LOCAL: | |
4816 | case SECCAT_DATA_REL_RO: | |
4817 | case SECCAT_DATA_REL_RO_LOCAL: | |
4818 | prefix = one_only ? ".gnu.linkonce.d." : ".data."; | |
4819 | break; | |
4820 | case SECCAT_SDATA: | |
4821 | prefix = one_only ? ".gnu.linkonce.s." : ".sdata."; | |
4822 | break; | |
4823 | case SECCAT_BSS: | |
4824 | prefix = one_only ? ".gnu.linkonce.b." : ".bss."; | |
4825 | break; | |
4826 | case SECCAT_SBSS: | |
4827 | prefix = one_only ? ".gnu.linkonce.sb." : ".sbss."; | |
4828 | break; | |
4829 | case SECCAT_TDATA: | |
c711ba8e RH |
4830 | prefix = one_only ? ".gnu.linkonce.td." : ".tdata."; |
4831 | break; | |
ae46c4e0 | 4832 | case SECCAT_TBSS: |
c711ba8e RH |
4833 | prefix = one_only ? ".gnu.linkonce.tb." : ".tbss."; |
4834 | break; | |
ae46c4e0 RH |
4835 | default: |
4836 | abort (); | |
4837 | } | |
4838 | plen = strlen (prefix); | |
4839 | ||
4840 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
245f1bfa | 4841 | name = targetm.strip_name_encoding (name); |
ae46c4e0 RH |
4842 | nlen = strlen (name); |
4843 | ||
4844 | string = alloca (nlen + plen + 1); | |
4845 | memcpy (string, prefix, plen); | |
4846 | memcpy (string + plen, name, nlen + 1); | |
4847 | ||
4848 | DECL_SECTION_NAME (decl) = build_string (nlen + plen, string); | |
4849 | } | |
b64a1b53 RH |
4850 | |
4851 | void | |
2e1eedd6 AJ |
4852 | default_select_rtx_section (enum machine_mode mode ATTRIBUTE_UNUSED, |
4853 | rtx x, | |
4854 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 RH |
4855 | { |
4856 | if (flag_pic) | |
4857 | switch (GET_CODE (x)) | |
4858 | { | |
4859 | case CONST: | |
4860 | case SYMBOL_REF: | |
4861 | case LABEL_REF: | |
4862 | data_section (); | |
4863 | return; | |
4864 | ||
4865 | default: | |
4866 | break; | |
4867 | } | |
4868 | ||
4869 | readonly_data_section (); | |
4870 | } | |
4871 | ||
4872 | void | |
2e1eedd6 AJ |
4873 | default_elf_select_rtx_section (enum machine_mode mode, rtx x, |
4874 | unsigned HOST_WIDE_INT align) | |
b64a1b53 RH |
4875 | { |
4876 | /* ??? Handle small data here somehow. */ | |
4877 | ||
4878 | if (flag_pic) | |
4879 | switch (GET_CODE (x)) | |
4880 | { | |
4881 | case CONST: | |
4882 | case SYMBOL_REF: | |
4883 | named_section (NULL_TREE, ".data.rel.ro", 3); | |
4884 | return; | |
4885 | ||
4886 | case LABEL_REF: | |
4887 | named_section (NULL_TREE, ".data.rel.ro.local", 1); | |
4888 | return; | |
4889 | ||
4890 | default: | |
4891 | break; | |
4892 | } | |
4893 | ||
4894 | mergeable_constant_section (mode, align, 0); | |
4895 | } | |
772c5265 | 4896 | |
52859c77 RH |
4897 | /* Set the generally applicable flags on the SYMBOL_REF for EXP. */ |
4898 | ||
4899 | void | |
2e1eedd6 | 4900 | default_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
52859c77 | 4901 | { |
c6a2438a | 4902 | rtx symbol; |
52859c77 RH |
4903 | int flags; |
4904 | ||
52859c77 | 4905 | /* Careful not to prod global register variables. */ |
3c0cb5de | 4906 | if (!MEM_P (rtl)) |
52859c77 RH |
4907 | return; |
4908 | symbol = XEXP (rtl, 0); | |
4909 | if (GET_CODE (symbol) != SYMBOL_REF) | |
4910 | return; | |
4911 | ||
4912 | flags = 0; | |
4913 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
4914 | flags |= SYMBOL_FLAG_FUNCTION; | |
5fd9b178 | 4915 | if (targetm.binds_local_p (decl)) |
52859c77 | 4916 | flags |= SYMBOL_FLAG_LOCAL; |
5fd9b178 | 4917 | if (targetm.in_small_data_p (decl)) |
52859c77 RH |
4918 | flags |= SYMBOL_FLAG_SMALL; |
4919 | if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL (decl)) | |
4920 | flags |= decl_tls_model (decl) << SYMBOL_FLAG_TLS_SHIFT; | |
1b8135a4 RH |
4921 | /* ??? Why is DECL_EXTERNAL ever set for non-PUBLIC names? Without |
4922 | being PUBLIC, the thing *must* be defined in this translation unit. | |
4923 | Prevent this buglet from being propagated into rtl code as well. */ | |
4924 | if (DECL_P (decl) && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl)) | |
52859c77 RH |
4925 | flags |= SYMBOL_FLAG_EXTERNAL; |
4926 | ||
4927 | SYMBOL_REF_FLAGS (symbol) = flags; | |
4928 | } | |
4929 | ||
772c5265 RH |
4930 | /* By default, we do nothing for encode_section_info, so we need not |
4931 | do anything but discard the '*' marker. */ | |
4932 | ||
4933 | const char * | |
2e1eedd6 | 4934 | default_strip_name_encoding (const char *str) |
772c5265 RH |
4935 | { |
4936 | return str + (*str == '*'); | |
4937 | } | |
47754fd5 RH |
4938 | |
4939 | /* Assume ELF-ish defaults, since that's pretty much the most liberal | |
4940 | wrt cross-module name binding. */ | |
4941 | ||
4942 | bool | |
2e1eedd6 | 4943 | default_binds_local_p (tree exp) |
2cc9fb4c | 4944 | { |
24a4dd31 | 4945 | return default_binds_local_p_1 (exp, flag_shlib); |
2cc9fb4c DE |
4946 | } |
4947 | ||
4948 | bool | |
2e1eedd6 | 4949 | default_binds_local_p_1 (tree exp, int shlib) |
47754fd5 RH |
4950 | { |
4951 | bool local_p; | |
4952 | ||
4953 | /* A non-decl is an entry in the constant pool. */ | |
4954 | if (!DECL_P (exp)) | |
4955 | local_p = true; | |
923c7cdf RH |
4956 | /* Static variables are always local. */ |
4957 | else if (! TREE_PUBLIC (exp)) | |
4958 | local_p = true; | |
4959 | /* A variable is local if the user tells us so. */ | |
968b41a1 | 4960 | else if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT) |
47754fd5 RH |
4961 | local_p = true; |
4962 | /* Otherwise, variables defined outside this object may not be local. */ | |
4963 | else if (DECL_EXTERNAL (exp)) | |
4964 | local_p = false; | |
4965 | /* Linkonce and weak data are never local. */ | |
4966 | else if (DECL_ONE_ONLY (exp) || DECL_WEAK (exp)) | |
4967 | local_p = false; | |
47754fd5 RH |
4968 | /* If PIC, then assume that any global name can be overridden by |
4969 | symbols resolved from other modules. */ | |
2cc9fb4c | 4970 | else if (shlib) |
47754fd5 RH |
4971 | local_p = false; |
4972 | /* Uninitialized COMMON variable may be unified with symbols | |
4973 | resolved from other modules. */ | |
4974 | else if (DECL_COMMON (exp) | |
4975 | && (DECL_INITIAL (exp) == NULL | |
4976 | || DECL_INITIAL (exp) == error_mark_node)) | |
4977 | local_p = false; | |
4978 | /* Otherwise we're left with initialized (or non-common) global data | |
4979 | which is of necessity defined locally. */ | |
4980 | else | |
4981 | local_p = true; | |
4982 | ||
4983 | return local_p; | |
4984 | } | |
e2500fed | 4985 | |
4977bab6 | 4986 | /* Determine whether or not a pointer mode is valid. Assume defaults |
5bdc5878 | 4987 | of ptr_mode or Pmode - can be overridden. */ |
4977bab6 | 4988 | bool |
2e1eedd6 | 4989 | default_valid_pointer_mode (enum machine_mode mode) |
4977bab6 ZW |
4990 | { |
4991 | return (mode == ptr_mode || mode == Pmode); | |
4992 | } | |
4993 | ||
5eb99654 KG |
4994 | /* Default function to output code that will globalize a label. A |
4995 | target must define GLOBAL_ASM_OP or provide it's own function to | |
4996 | globalize a label. */ | |
4997 | #ifdef GLOBAL_ASM_OP | |
4998 | void | |
2e1eedd6 | 4999 | default_globalize_label (FILE * stream, const char *name) |
5eb99654 KG |
5000 | { |
5001 | fputs (GLOBAL_ASM_OP, stream); | |
5002 | assemble_name (stream, name); | |
5003 | putc ('\n', stream); | |
5004 | } | |
5005 | #endif /* GLOBAL_ASM_OP */ | |
2e1eedd6 | 5006 | |
4746cf84 MA |
5007 | /* Default function to output a label for unwind information. The |
5008 | default is to do nothing. A target that needs nonlocal labels for | |
9cf737f8 | 5009 | unwind information must provide its own function to do this. */ |
4746cf84 MA |
5010 | void |
5011 | default_emit_unwind_label (FILE * stream ATTRIBUTE_UNUSED, | |
5012 | tree decl ATTRIBUTE_UNUSED, | |
eeab4d81 | 5013 | int for_eh ATTRIBUTE_UNUSED, |
4746cf84 MA |
5014 | int empty ATTRIBUTE_UNUSED) |
5015 | { | |
5016 | } | |
5017 | ||
4977bab6 ZW |
5018 | /* This is how to output an internal numbered label where PREFIX is |
5019 | the class of label and LABELNO is the number within the class. */ | |
5020 | ||
5021 | void | |
2e1eedd6 AJ |
5022 | default_internal_label (FILE *stream, const char *prefix, |
5023 | unsigned long labelno) | |
4977bab6 ZW |
5024 | { |
5025 | char *const buf = alloca (40 + strlen (prefix)); | |
5026 | ASM_GENERATE_INTERNAL_LABEL (buf, prefix, labelno); | |
5027 | ASM_OUTPUT_LABEL (stream, buf); | |
5028 | } | |
5029 | ||
1bc7c5b6 ZW |
5030 | /* This is the default behavior at the beginning of a file. It's |
5031 | controlled by two other target-hook toggles. */ | |
5032 | void | |
2e1eedd6 | 5033 | default_file_start (void) |
1bc7c5b6 ZW |
5034 | { |
5035 | if (targetm.file_start_app_off && !flag_verbose_asm) | |
5036 | fputs (ASM_APP_OFF, asm_out_file); | |
5037 | ||
5038 | if (targetm.file_start_file_directive) | |
5039 | output_file_directive (asm_out_file, main_input_filename); | |
5040 | } | |
5041 | ||
a5fe455b ZW |
5042 | /* This is a generic routine suitable for use as TARGET_ASM_FILE_END |
5043 | which emits a special section directive used to indicate whether or | |
5044 | not this object file needs an executable stack. This is primarily | |
5045 | a GNU extension to ELF but could be used on other targets. */ | |
6de9cd9a DN |
5046 | |
5047 | int trampolines_created; | |
5048 | ||
a5fe455b | 5049 | void |
2e1eedd6 | 5050 | file_end_indicate_exec_stack (void) |
a5fe455b ZW |
5051 | { |
5052 | unsigned int flags = SECTION_DEBUG; | |
5053 | if (trampolines_created) | |
5054 | flags |= SECTION_CODE; | |
5055 | ||
5056 | named_section_flags (".note.GNU-stack", flags); | |
5057 | } | |
5058 | ||
e2500fed | 5059 | #include "gt-varasm.h" |