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61f71b34 | 1 | /* Default target hook functions. |
96e45421 | 2 | Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 |
e6ff3083 | 3 | Free Software Foundation, Inc. |
61f71b34 DD |
4 | |
5 | This file is part of GCC. | |
6 | ||
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 | |
9dcd6f09 | 9 | Software Foundation; either version 3, or (at your option) any later |
61f71b34 DD |
10 | version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
61f71b34 | 20 | |
dd37c5a0 DD |
21 | /* The migration of target macros to target hooks works as follows: |
22 | ||
23 | 1. Create a target hook that uses the existing target macros to | |
24 | implement the same functionality. | |
25 | ||
26 | 2. Convert all the MI files to use the hook instead of the macro. | |
27 | ||
28 | 3. Repeat for a majority of the remaining target macros. This will | |
29 | take some time. | |
30 | ||
31 | 4. Tell target maintainers to start migrating. | |
32 | ||
33 | 5. Eventually convert the backends to override the hook instead of | |
34 | defining the macros. This will take some time too. | |
35 | ||
36 | 6. TBD when, poison the macros. Unmigrated targets will break at | |
37 | this point. | |
38 | ||
39 | Note that we expect steps 1-3 to be done by the people that | |
40 | understand what the MI does with each macro, and step 5 to be done | |
41 | by the target maintainers for their respective targets. | |
42 | ||
43 | Note that steps 1 and 2 don't have to be done together, but no | |
44 | target can override the new hook until step 2 is complete for it. | |
45 | ||
46 | Once the macros are poisoned, we will revert to the old migration | |
47 | rules - migrate the macro, callers, and targets all at once. This | |
48 | comment can thus be removed at that point. */ | |
49 | ||
61f71b34 DD |
50 | #include "config.h" |
51 | #include "system.h" | |
52 | #include "coretypes.h" | |
53 | #include "tm.h" | |
54 | #include "machmode.h" | |
55 | #include "rtl.h" | |
56 | #include "tree.h" | |
57 | #include "expr.h" | |
d84a4ef1 | 58 | #include "output.h" |
718f9c0f | 59 | #include "diagnostic-core.h" |
61f71b34 DD |
60 | #include "function.h" |
61 | #include "target.h" | |
62 | #include "tm_p.h" | |
63 | #include "target-def.h" | |
7d69de61 | 64 | #include "ggc.h" |
150cdc9e | 65 | #include "hard-reg-set.h" |
ffa88471 | 66 | #include "regs.h" |
8a99f6f9 R |
67 | #include "reload.h" |
68 | #include "optabs.h" | |
69 | #include "recog.h" | |
a803773f JM |
70 | #include "intl.h" |
71 | #include "opts.h" | |
7352c013 RG |
72 | #include "tree-flow.h" |
73 | #include "tree-ssa-alias.h" | |
61f71b34 | 74 | |
6dd53648 | 75 | |
c6c3dba9 PB |
76 | bool |
77 | default_legitimate_address_p (enum machine_mode mode ATTRIBUTE_UNUSED, | |
78 | rtx addr ATTRIBUTE_UNUSED, | |
79 | bool strict ATTRIBUTE_UNUSED) | |
80 | { | |
81 | #ifdef GO_IF_LEGITIMATE_ADDRESS | |
82 | /* Defer to the old implementation using a goto. */ | |
83 | if (strict) | |
84 | return strict_memory_address_p (mode, addr); | |
85 | else | |
86 | return memory_address_p (mode, addr); | |
87 | #else | |
88 | gcc_unreachable (); | |
89 | #endif | |
90 | } | |
91 | ||
6773a41c RO |
92 | void |
93 | default_external_libcall (rtx fun ATTRIBUTE_UNUSED) | |
94 | { | |
95 | #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL | |
96 | ASM_OUTPUT_EXTERNAL_LIBCALL(asm_out_file, fun); | |
97 | #endif | |
98 | } | |
99 | ||
215b063c PB |
100 | int |
101 | default_unspec_may_trap_p (const_rtx x, unsigned flags) | |
102 | { | |
103 | int i; | |
104 | ||
105 | if (GET_CODE (x) == UNSPEC_VOLATILE | |
106 | /* Any floating arithmetic may trap. */ | |
107 | || (SCALAR_FLOAT_MODE_P (GET_MODE (x)) | |
108 | && flag_trapping_math)) | |
109 | return 1; | |
110 | ||
111 | for (i = 0; i < XVECLEN (x, 0); ++i) | |
112 | { | |
113 | if (may_trap_p_1 (XVECEXP (x, 0, i), flags)) | |
114 | return 1; | |
115 | } | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
cde0f3fd PB |
120 | enum machine_mode |
121 | default_promote_function_mode (const_tree type ATTRIBUTE_UNUSED, | |
122 | enum machine_mode mode, | |
123 | int *punsignedp ATTRIBUTE_UNUSED, | |
124 | const_tree funtype ATTRIBUTE_UNUSED, | |
125 | int for_return ATTRIBUTE_UNUSED) | |
126 | { | |
5e617be8 | 127 | if (type != NULL_TREE && for_return == 2) |
666e3ceb | 128 | return promote_mode (type, mode, punsignedp); |
cde0f3fd PB |
129 | return mode; |
130 | } | |
131 | ||
132 | enum machine_mode | |
133 | default_promote_function_mode_always_promote (const_tree type, | |
134 | enum machine_mode mode, | |
135 | int *punsignedp, | |
136 | const_tree funtype ATTRIBUTE_UNUSED, | |
137 | int for_return ATTRIBUTE_UNUSED) | |
138 | { | |
139 | return promote_mode (type, mode, punsignedp); | |
140 | } | |
141 | ||
142 | ||
e129d93a ILT |
143 | enum machine_mode |
144 | default_cc_modes_compatible (enum machine_mode m1, enum machine_mode m2) | |
145 | { | |
146 | if (m1 == m2) | |
147 | return m1; | |
148 | return VOIDmode; | |
149 | } | |
150 | ||
61f71b34 | 151 | bool |
586de218 KG |
152 | default_return_in_memory (const_tree type, |
153 | const_tree fntype ATTRIBUTE_UNUSED) | |
61f71b34 | 154 | { |
33d05111 | 155 | return (TYPE_MODE (type) == BLKmode); |
61f71b34 DD |
156 | } |
157 | ||
506d7b68 PB |
158 | rtx |
159 | default_legitimize_address (rtx x, rtx orig_x ATTRIBUTE_UNUSED, | |
160 | enum machine_mode mode ATTRIBUTE_UNUSED) | |
161 | { | |
162 | return x; | |
163 | } | |
164 | ||
61f71b34 DD |
165 | rtx |
166 | default_expand_builtin_saveregs (void) | |
167 | { | |
61f71b34 DD |
168 | error ("__builtin_saveregs not supported by this target"); |
169 | return const0_rtx; | |
61f71b34 DD |
170 | } |
171 | ||
172 | void | |
d5cc9181 | 173 | default_setup_incoming_varargs (cumulative_args_t ca ATTRIBUTE_UNUSED, |
61f71b34 DD |
174 | enum machine_mode mode ATTRIBUTE_UNUSED, |
175 | tree type ATTRIBUTE_UNUSED, | |
176 | int *pretend_arg_size ATTRIBUTE_UNUSED, | |
177 | int second_time ATTRIBUTE_UNUSED) | |
178 | { | |
61f71b34 DD |
179 | } |
180 | ||
d6da68b9 KH |
181 | /* The default implementation of TARGET_BUILTIN_SETJMP_FRAME_VALUE. */ |
182 | ||
183 | rtx | |
184 | default_builtin_setjmp_frame_value (void) | |
185 | { | |
186 | return virtual_stack_vars_rtx; | |
187 | } | |
188 | ||
3a4d587b | 189 | /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns false. */ |
8dfa8fcd | 190 | |
61f71b34 | 191 | bool |
d5cc9181 | 192 | hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t ca ATTRIBUTE_UNUSED) |
61f71b34 | 193 | { |
b602b7b6 | 194 | return false; |
61f71b34 DD |
195 | } |
196 | ||
197 | bool | |
d5cc9181 | 198 | default_pretend_outgoing_varargs_named (cumulative_args_t ca ATTRIBUTE_UNUSED) |
61f71b34 | 199 | { |
3a4d587b AM |
200 | return (targetm.calls.setup_incoming_varargs |
201 | != default_setup_incoming_varargs); | |
61f71b34 | 202 | } |
c6e8c921 | 203 | |
a1c496cb | 204 | enum machine_mode |
93f90be6 FJ |
205 | default_eh_return_filter_mode (void) |
206 | { | |
7b0518e3 | 207 | return targetm.unwind_word_mode (); |
93f90be6 FJ |
208 | } |
209 | ||
c7ff6e7a AK |
210 | enum machine_mode |
211 | default_libgcc_cmp_return_mode (void) | |
212 | { | |
213 | return word_mode; | |
214 | } | |
215 | ||
216 | enum machine_mode | |
217 | default_libgcc_shift_count_mode (void) | |
218 | { | |
219 | return word_mode; | |
220 | } | |
221 | ||
7b0518e3 UW |
222 | enum machine_mode |
223 | default_unwind_word_mode (void) | |
224 | { | |
225 | return word_mode; | |
226 | } | |
227 | ||
273a2526 RS |
228 | /* The default implementation of TARGET_SHIFT_TRUNCATION_MASK. */ |
229 | ||
230 | unsigned HOST_WIDE_INT | |
231 | default_shift_truncation_mask (enum machine_mode mode) | |
232 | { | |
233 | return SHIFT_COUNT_TRUNCATED ? GET_MODE_BITSIZE (mode) - 1 : 0; | |
234 | } | |
235 | ||
bc23502b PB |
236 | /* The default implementation of TARGET_MIN_DIVISIONS_FOR_RECIP_MUL. */ |
237 | ||
238 | unsigned int | |
239 | default_min_divisions_for_recip_mul (enum machine_mode mode ATTRIBUTE_UNUSED) | |
240 | { | |
241 | return have_insn_for (DIV, mode) ? 3 : 2; | |
242 | } | |
243 | ||
b12cbf2c AN |
244 | /* The default implementation of TARGET_MODE_REP_EXTENDED. */ |
245 | ||
246 | int | |
247 | default_mode_rep_extended (enum machine_mode mode ATTRIBUTE_UNUSED, | |
248 | enum machine_mode mode_rep ATTRIBUTE_UNUSED) | |
249 | { | |
250 | return UNKNOWN; | |
251 | } | |
252 | ||
c6e8c921 | 253 | /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns true. */ |
0938c9e8 | 254 | |
c6e8c921 | 255 | bool |
d5cc9181 | 256 | hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t a ATTRIBUTE_UNUSED) |
c6e8c921 GK |
257 | { |
258 | return true; | |
259 | } | |
4185ae53 | 260 | |
c77cd3d1 UB |
261 | /* Return machine mode for non-standard suffix |
262 | or VOIDmode if non-standard suffixes are unsupported. */ | |
263 | enum machine_mode | |
264 | default_mode_for_suffix (char suffix ATTRIBUTE_UNUSED) | |
265 | { | |
266 | return VOIDmode; | |
267 | } | |
4185ae53 PB |
268 | |
269 | /* The generic C++ ABI specifies this is a 64-bit value. */ | |
270 | tree | |
271 | default_cxx_guard_type (void) | |
272 | { | |
273 | return long_long_integer_type_node; | |
274 | } | |
46e995e0 PB |
275 | |
276 | ||
277 | /* Returns the size of the cookie to use when allocating an array | |
278 | whose elements have the indicated TYPE. Assumes that it is already | |
279 | known that a cookie is needed. */ | |
280 | ||
281 | tree | |
282 | default_cxx_get_cookie_size (tree type) | |
283 | { | |
284 | tree cookie_size; | |
285 | ||
286 | /* We need to allocate an additional max (sizeof (size_t), alignof | |
287 | (true_type)) bytes. */ | |
288 | tree sizetype_size; | |
289 | tree type_align; | |
a1c496cb | 290 | |
46e995e0 PB |
291 | sizetype_size = size_in_bytes (sizetype); |
292 | type_align = size_int (TYPE_ALIGN_UNIT (type)); | |
293 | if (INT_CST_LT_UNSIGNED (type_align, sizetype_size)) | |
294 | cookie_size = sizetype_size; | |
295 | else | |
296 | cookie_size = type_align; | |
297 | ||
298 | return cookie_size; | |
299 | } | |
8cd5a4e0 | 300 | |
8cd5a4e0 RH |
301 | /* Return true if a parameter must be passed by reference. This version |
302 | of the TARGET_PASS_BY_REFERENCE hook uses just MUST_PASS_IN_STACK. */ | |
303 | ||
304 | bool | |
d5cc9181 | 305 | hook_pass_by_reference_must_pass_in_stack (cumulative_args_t c ATTRIBUTE_UNUSED, |
586de218 | 306 | enum machine_mode mode ATTRIBUTE_UNUSED, const_tree type ATTRIBUTE_UNUSED, |
8cd5a4e0 RH |
307 | bool named_arg ATTRIBUTE_UNUSED) |
308 | { | |
309 | return targetm.calls.must_pass_in_stack (mode, type); | |
310 | } | |
951120ea | 311 | |
6cdd5672 RH |
312 | /* Return true if a parameter follows callee copies conventions. This |
313 | version of the hook is true for all named arguments. */ | |
314 | ||
315 | bool | |
d5cc9181 | 316 | hook_callee_copies_named (cumulative_args_t ca ATTRIBUTE_UNUSED, |
6cdd5672 | 317 | enum machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 318 | const_tree type ATTRIBUTE_UNUSED, bool named) |
6cdd5672 RH |
319 | { |
320 | return named; | |
321 | } | |
951120ea | 322 | |
6e2188e0 NF |
323 | /* Emit to STREAM the assembler syntax for insn operand X. */ |
324 | ||
325 | void | |
326 | default_print_operand (FILE *stream ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, | |
327 | int code ATTRIBUTE_UNUSED) | |
328 | { | |
329 | #ifdef PRINT_OPERAND | |
330 | PRINT_OPERAND (stream, x, code); | |
331 | #else | |
332 | gcc_unreachable (); | |
333 | #endif | |
334 | } | |
335 | ||
336 | /* Emit to STREAM the assembler syntax for an insn operand whose memory | |
337 | address is X. */ | |
338 | ||
339 | void | |
340 | default_print_operand_address (FILE *stream ATTRIBUTE_UNUSED, | |
341 | rtx x ATTRIBUTE_UNUSED) | |
342 | { | |
343 | #ifdef PRINT_OPERAND_ADDRESS | |
344 | PRINT_OPERAND_ADDRESS (stream, x); | |
345 | #else | |
346 | gcc_unreachable (); | |
347 | #endif | |
348 | } | |
349 | ||
350 | /* Return true if CODE is a valid punctuation character for the | |
351 | `print_operand' hook. */ | |
352 | ||
353 | bool | |
354 | default_print_operand_punct_valid_p (unsigned char code ATTRIBUTE_UNUSED) | |
355 | { | |
356 | #ifdef PRINT_OPERAND_PUNCT_VALID_P | |
357 | return PRINT_OPERAND_PUNCT_VALID_P (code); | |
358 | #else | |
359 | return false; | |
360 | #endif | |
361 | } | |
362 | ||
77754180 DK |
363 | /* The default implementation of TARGET_MANGLE_ASSEMBLER_NAME. */ |
364 | tree | |
365 | default_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED) | |
366 | { | |
367 | const char *skipped = name + (*name == '*' ? 1 : 0); | |
368 | const char *stripped = targetm.strip_name_encoding (skipped); | |
369 | if (*name != '*' && user_label_prefix[0]) | |
370 | stripped = ACONCAT ((user_label_prefix, stripped, NULL)); | |
371 | return get_identifier (stripped); | |
372 | } | |
373 | ||
6dd53648 RH |
374 | /* True if MODE is valid for the target. By "valid", we mean able to |
375 | be manipulated in non-trivial ways. In particular, this means all | |
376 | the arithmetic is supported. | |
377 | ||
378 | By default we guess this means that any C type is supported. If | |
379 | we can't map the mode back to a type that would be available in C, | |
380 | then reject it. Special case, here, is the double-word arithmetic | |
381 | supported by optabs.c. */ | |
382 | ||
383 | bool | |
384 | default_scalar_mode_supported_p (enum machine_mode mode) | |
385 | { | |
386 | int precision = GET_MODE_PRECISION (mode); | |
387 | ||
388 | switch (GET_MODE_CLASS (mode)) | |
389 | { | |
390 | case MODE_PARTIAL_INT: | |
391 | case MODE_INT: | |
392 | if (precision == CHAR_TYPE_SIZE) | |
393 | return true; | |
394 | if (precision == SHORT_TYPE_SIZE) | |
395 | return true; | |
396 | if (precision == INT_TYPE_SIZE) | |
397 | return true; | |
398 | if (precision == LONG_TYPE_SIZE) | |
399 | return true; | |
400 | if (precision == LONG_LONG_TYPE_SIZE) | |
401 | return true; | |
402 | if (precision == 2 * BITS_PER_WORD) | |
403 | return true; | |
404 | return false; | |
405 | ||
406 | case MODE_FLOAT: | |
407 | if (precision == FLOAT_TYPE_SIZE) | |
408 | return true; | |
409 | if (precision == DOUBLE_TYPE_SIZE) | |
410 | return true; | |
411 | if (precision == LONG_DOUBLE_TYPE_SIZE) | |
412 | return true; | |
413 | return false; | |
414 | ||
9a8ce21f | 415 | case MODE_DECIMAL_FLOAT: |
ab22c1fa CF |
416 | case MODE_FRACT: |
417 | case MODE_UFRACT: | |
418 | case MODE_ACCUM: | |
419 | case MODE_UACCUM: | |
9a8ce21f JG |
420 | return false; |
421 | ||
6dd53648 | 422 | default: |
1e128c5f | 423 | gcc_unreachable (); |
6dd53648 RH |
424 | } |
425 | } | |
6cdd5672 | 426 | |
2e681adf JR |
427 | /* Make some target macros useable by target-independent code. */ |
428 | bool | |
429 | targhook_words_big_endian (void) | |
430 | { | |
431 | return !!WORDS_BIG_ENDIAN; | |
432 | } | |
433 | ||
434 | bool | |
435 | targhook_float_words_big_endian (void) | |
436 | { | |
437 | return !!FLOAT_WORDS_BIG_ENDIAN; | |
438 | } | |
439 | ||
0884546e BE |
440 | /* True if the target supports decimal floating point. */ |
441 | ||
442 | bool | |
443 | default_decimal_float_supported_p (void) | |
444 | { | |
445 | return ENABLE_DECIMAL_FLOAT; | |
446 | } | |
447 | ||
ab22c1fa CF |
448 | /* True if the target supports fixed-point arithmetic. */ |
449 | ||
450 | bool | |
451 | default_fixed_point_supported_p (void) | |
452 | { | |
453 | return ENABLE_FIXED_POINT; | |
454 | } | |
455 | ||
e7e64a25 AS |
456 | /* NULL if INSN insn is valid within a low-overhead loop, otherwise returns |
457 | an error message. | |
b8698a0f | 458 | |
0fa2e4df | 459 | This function checks whether a given INSN is valid within a low-overhead |
e7e64a25 AS |
460 | loop. If INSN is invalid it returns the reason for that, otherwise it |
461 | returns NULL. A called function may clobber any special registers required | |
462 | for low-overhead looping. Additionally, some targets (eg, PPC) use the count | |
a71a498d AS |
463 | register for branch on table instructions. We reject the doloop pattern in |
464 | these cases. */ | |
465 | ||
e7e64a25 | 466 | const char * |
3101faab | 467 | default_invalid_within_doloop (const_rtx insn) |
a71a498d AS |
468 | { |
469 | if (CALL_P (insn)) | |
e7e64a25 | 470 | return "Function call in loop."; |
b8698a0f | 471 | |
481683e1 | 472 | if (JUMP_TABLE_DATA_P (insn)) |
e7e64a25 | 473 | return "Computed branch in the loop."; |
b8698a0f | 474 | |
e7e64a25 | 475 | return NULL; |
a71a498d AS |
476 | } |
477 | ||
2505a3f2 RG |
478 | /* Mapping of builtin functions to vectorized variants. */ |
479 | ||
480 | tree | |
62f7fd21 | 481 | default_builtin_vectorized_function (tree fndecl ATTRIBUTE_UNUSED, |
b95becfc RG |
482 | tree type_out ATTRIBUTE_UNUSED, |
483 | tree type_in ATTRIBUTE_UNUSED) | |
2505a3f2 RG |
484 | { |
485 | return NULL_TREE; | |
486 | } | |
487 | ||
f57d17f1 TM |
488 | /* Vectorized conversion. */ |
489 | ||
490 | tree | |
744aa42f | 491 | default_builtin_vectorized_conversion (unsigned int code ATTRIBUTE_UNUSED, |
88dd7150 RG |
492 | tree dest_type ATTRIBUTE_UNUSED, |
493 | tree src_type ATTRIBUTE_UNUSED) | |
f57d17f1 TM |
494 | { |
495 | return NULL_TREE; | |
496 | } | |
497 | ||
35e1a5e7 IR |
498 | /* Default vectorizer cost model values. */ |
499 | ||
500 | int | |
720f5239 | 501 | default_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost, |
a21892ad | 502 | tree vectype, |
720f5239 | 503 | int misalign ATTRIBUTE_UNUSED) |
35e1a5e7 | 504 | { |
a21892ad BS |
505 | unsigned elements; |
506 | ||
35e1a5e7 IR |
507 | switch (type_of_cost) |
508 | { | |
509 | case scalar_stmt: | |
510 | case scalar_load: | |
511 | case scalar_store: | |
512 | case vector_stmt: | |
513 | case vector_load: | |
514 | case vector_store: | |
515 | case vec_to_scalar: | |
516 | case scalar_to_vec: | |
517 | case cond_branch_not_taken: | |
518 | case vec_perm: | |
8bd37302 | 519 | case vec_promote_demote: |
35e1a5e7 IR |
520 | return 1; |
521 | ||
522 | case unaligned_load: | |
720f5239 | 523 | case unaligned_store: |
35e1a5e7 IR |
524 | return 2; |
525 | ||
526 | case cond_branch_taken: | |
527 | return 3; | |
528 | ||
a21892ad BS |
529 | case vec_construct: |
530 | elements = TYPE_VECTOR_SUBPARTS (vectype); | |
531 | return elements / 2 + 1; | |
532 | ||
35e1a5e7 IR |
533 | default: |
534 | gcc_unreachable (); | |
535 | } | |
536 | } | |
537 | ||
cc2137be UB |
538 | /* Reciprocal. */ |
539 | ||
540 | tree | |
744aa42f | 541 | default_builtin_reciprocal (unsigned int fn ATTRIBUTE_UNUSED, |
ac10986f | 542 | bool md_fn ATTRIBUTE_UNUSED, |
cc2137be UB |
543 | bool sqrt ATTRIBUTE_UNUSED) |
544 | { | |
545 | return NULL_TREE; | |
546 | } | |
547 | ||
6cdd5672 RH |
548 | bool |
549 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false ( | |
d5cc9181 | 550 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
6cdd5672 | 551 | enum machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 552 | const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
6cdd5672 RH |
553 | { |
554 | return false; | |
555 | } | |
556 | ||
557 | bool | |
558 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true ( | |
d5cc9181 | 559 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
6cdd5672 | 560 | enum machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 561 | const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
6cdd5672 RH |
562 | { |
563 | return true; | |
564 | } | |
78a52f11 RH |
565 | |
566 | int | |
567 | hook_int_CUMULATIVE_ARGS_mode_tree_bool_0 ( | |
d5cc9181 | 568 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
78a52f11 RH |
569 | enum machine_mode mode ATTRIBUTE_UNUSED, |
570 | tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) | |
571 | { | |
572 | return 0; | |
573 | } | |
4d3e6fae | 574 | |
3c07301f | 575 | void |
d5cc9181 | 576 | default_function_arg_advance (cumulative_args_t ca ATTRIBUTE_UNUSED, |
3c07301f NF |
577 | enum machine_mode mode ATTRIBUTE_UNUSED, |
578 | const_tree type ATTRIBUTE_UNUSED, | |
579 | bool named ATTRIBUTE_UNUSED) | |
580 | { | |
3c07301f | 581 | gcc_unreachable (); |
3c07301f NF |
582 | } |
583 | ||
584 | rtx | |
d5cc9181 | 585 | default_function_arg (cumulative_args_t ca ATTRIBUTE_UNUSED, |
3c07301f NF |
586 | enum machine_mode mode ATTRIBUTE_UNUSED, |
587 | const_tree type ATTRIBUTE_UNUSED, | |
588 | bool named ATTRIBUTE_UNUSED) | |
589 | { | |
3c07301f | 590 | gcc_unreachable (); |
3c07301f NF |
591 | } |
592 | ||
593 | rtx | |
d5cc9181 | 594 | default_function_incoming_arg (cumulative_args_t ca ATTRIBUTE_UNUSED, |
3c07301f NF |
595 | enum machine_mode mode ATTRIBUTE_UNUSED, |
596 | const_tree type ATTRIBUTE_UNUSED, | |
597 | bool named ATTRIBUTE_UNUSED) | |
598 | { | |
3c07301f | 599 | gcc_unreachable (); |
3c07301f NF |
600 | } |
601 | ||
c2ed6cf8 NF |
602 | unsigned int |
603 | default_function_arg_boundary (enum machine_mode mode ATTRIBUTE_UNUSED, | |
604 | const_tree type ATTRIBUTE_UNUSED) | |
605 | { | |
606 | return PARM_BOUNDARY; | |
607 | } | |
608 | ||
123148b5 BS |
609 | unsigned int |
610 | default_function_arg_round_boundary (enum machine_mode mode ATTRIBUTE_UNUSED, | |
611 | const_tree type ATTRIBUTE_UNUSED) | |
612 | { | |
613 | return PARM_BOUNDARY; | |
614 | } | |
615 | ||
b8698a0f | 616 | void |
912f2dac DB |
617 | hook_void_bitmap (bitmap regs ATTRIBUTE_UNUSED) |
618 | { | |
619 | } | |
620 | ||
4d3e6fae FJ |
621 | const char * |
622 | hook_invalid_arg_for_unprototyped_fn ( | |
3101faab KG |
623 | const_tree typelist ATTRIBUTE_UNUSED, |
624 | const_tree funcdecl ATTRIBUTE_UNUSED, | |
625 | const_tree val ATTRIBUTE_UNUSED) | |
4d3e6fae FJ |
626 | { |
627 | return NULL; | |
628 | } | |
7d69de61 RH |
629 | |
630 | /* Initialize the stack protection decls. */ | |
631 | ||
632 | /* Stack protection related decls living in libgcc. */ | |
633 | static GTY(()) tree stack_chk_guard_decl; | |
634 | ||
635 | tree | |
636 | default_stack_protect_guard (void) | |
637 | { | |
638 | tree t = stack_chk_guard_decl; | |
639 | ||
640 | if (t == NULL) | |
641 | { | |
623a6941 MK |
642 | rtx x; |
643 | ||
c2255bc4 AH |
644 | t = build_decl (UNKNOWN_LOCATION, |
645 | VAR_DECL, get_identifier ("__stack_chk_guard"), | |
7d69de61 RH |
646 | ptr_type_node); |
647 | TREE_STATIC (t) = 1; | |
648 | TREE_PUBLIC (t) = 1; | |
649 | DECL_EXTERNAL (t) = 1; | |
650 | TREE_USED (t) = 1; | |
651 | TREE_THIS_VOLATILE (t) = 1; | |
652 | DECL_ARTIFICIAL (t) = 1; | |
653 | DECL_IGNORED_P (t) = 1; | |
654 | ||
623a6941 MK |
655 | /* Do not share RTL as the declaration is visible outside of |
656 | current function. */ | |
657 | x = DECL_RTL (t); | |
658 | RTX_FLAG (x, used) = 1; | |
659 | ||
7d69de61 RH |
660 | stack_chk_guard_decl = t; |
661 | } | |
662 | ||
663 | return t; | |
664 | } | |
665 | ||
666 | static GTY(()) tree stack_chk_fail_decl; | |
667 | ||
b8698a0f | 668 | tree |
7d69de61 RH |
669 | default_external_stack_protect_fail (void) |
670 | { | |
671 | tree t = stack_chk_fail_decl; | |
672 | ||
673 | if (t == NULL_TREE) | |
674 | { | |
675 | t = build_function_type_list (void_type_node, NULL_TREE); | |
c2255bc4 AH |
676 | t = build_decl (UNKNOWN_LOCATION, |
677 | FUNCTION_DECL, get_identifier ("__stack_chk_fail"), t); | |
7d69de61 RH |
678 | TREE_STATIC (t) = 1; |
679 | TREE_PUBLIC (t) = 1; | |
680 | DECL_EXTERNAL (t) = 1; | |
681 | TREE_USED (t) = 1; | |
682 | TREE_THIS_VOLATILE (t) = 1; | |
683 | TREE_NOTHROW (t) = 1; | |
684 | DECL_ARTIFICIAL (t) = 1; | |
685 | DECL_IGNORED_P (t) = 1; | |
5b5cba1f JM |
686 | DECL_VISIBILITY (t) = VISIBILITY_DEFAULT; |
687 | DECL_VISIBILITY_SPECIFIED (t) = 1; | |
7d69de61 RH |
688 | |
689 | stack_chk_fail_decl = t; | |
690 | } | |
691 | ||
5039610b | 692 | return build_call_expr (t, 0); |
7d69de61 RH |
693 | } |
694 | ||
695 | tree | |
696 | default_hidden_stack_protect_fail (void) | |
697 | { | |
7ce918c5 JJ |
698 | #ifndef HAVE_GAS_HIDDEN |
699 | return default_external_stack_protect_fail (); | |
700 | #else | |
7d69de61 RH |
701 | tree t = stack_chk_fail_decl; |
702 | ||
7ce918c5 JJ |
703 | if (!flag_pic) |
704 | return default_external_stack_protect_fail (); | |
705 | ||
706 | if (t == NULL_TREE) | |
7d69de61 RH |
707 | { |
708 | t = build_function_type_list (void_type_node, NULL_TREE); | |
c2255bc4 | 709 | t = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL, |
7d69de61 RH |
710 | get_identifier ("__stack_chk_fail_local"), t); |
711 | TREE_STATIC (t) = 1; | |
712 | TREE_PUBLIC (t) = 1; | |
713 | DECL_EXTERNAL (t) = 1; | |
714 | TREE_USED (t) = 1; | |
715 | TREE_THIS_VOLATILE (t) = 1; | |
716 | TREE_NOTHROW (t) = 1; | |
717 | DECL_ARTIFICIAL (t) = 1; | |
718 | DECL_IGNORED_P (t) = 1; | |
719 | DECL_VISIBILITY_SPECIFIED (t) = 1; | |
720 | DECL_VISIBILITY (t) = VISIBILITY_HIDDEN; | |
721 | ||
722 | stack_chk_fail_decl = t; | |
723 | } | |
724 | ||
5039610b | 725 | return build_call_expr (t, 0); |
7ce918c5 | 726 | #endif |
7d69de61 RH |
727 | } |
728 | ||
8ddf681a | 729 | bool |
3101faab KG |
730 | hook_bool_const_rtx_commutative_p (const_rtx x, |
731 | int outer_code ATTRIBUTE_UNUSED) | |
8ddf681a R |
732 | { |
733 | return COMMUTATIVE_P (x); | |
734 | } | |
735 | ||
1d636cc6 | 736 | rtx |
586de218 KG |
737 | default_function_value (const_tree ret_type ATTRIBUTE_UNUSED, |
738 | const_tree fn_decl_or_type, | |
1d636cc6 RG |
739 | bool outgoing ATTRIBUTE_UNUSED) |
740 | { | |
741 | /* The old interface doesn't handle receiving the function type. */ | |
742 | if (fn_decl_or_type | |
743 | && !DECL_P (fn_decl_or_type)) | |
744 | fn_decl_or_type = NULL; | |
745 | ||
1d636cc6 RG |
746 | #ifdef FUNCTION_VALUE |
747 | return FUNCTION_VALUE (ret_type, fn_decl_or_type); | |
748 | #else | |
7fc6a96b | 749 | gcc_unreachable (); |
1d636cc6 RG |
750 | #endif |
751 | } | |
752 | ||
390b17c2 | 753 | rtx |
7fc6a96b AS |
754 | default_libcall_value (enum machine_mode mode ATTRIBUTE_UNUSED, |
755 | const_rtx fun ATTRIBUTE_UNUSED) | |
390b17c2 | 756 | { |
7fc6a96b | 757 | #ifdef LIBCALL_VALUE |
390b17c2 | 758 | return LIBCALL_VALUE (mode); |
7fc6a96b AS |
759 | #else |
760 | gcc_unreachable (); | |
761 | #endif | |
390b17c2 RE |
762 | } |
763 | ||
82f81f18 AS |
764 | /* The default hook for TARGET_FUNCTION_VALUE_REGNO_P. */ |
765 | ||
766 | bool | |
767 | default_function_value_regno_p (const unsigned int regno ATTRIBUTE_UNUSED) | |
768 | { | |
769 | #ifdef FUNCTION_VALUE_REGNO_P | |
770 | return FUNCTION_VALUE_REGNO_P (regno); | |
771 | #else | |
772 | gcc_unreachable (); | |
773 | #endif | |
774 | } | |
775 | ||
150cdc9e RH |
776 | rtx |
777 | default_internal_arg_pointer (void) | |
778 | { | |
779 | /* If the reg that the virtual arg pointer will be translated into is | |
780 | not a fixed reg or is the stack pointer, make a copy of the virtual | |
781 | arg pointer, and address parms via the copy. The frame pointer is | |
782 | considered fixed even though it is not marked as such. */ | |
783 | if ((ARG_POINTER_REGNUM == STACK_POINTER_REGNUM | |
784 | || ! (fixed_regs[ARG_POINTER_REGNUM] | |
785 | || ARG_POINTER_REGNUM == FRAME_POINTER_REGNUM))) | |
786 | return copy_to_reg (virtual_incoming_args_rtx); | |
787 | else | |
788 | return virtual_incoming_args_rtx; | |
789 | } | |
790 | ||
531ca746 RH |
791 | rtx |
792 | default_static_chain (const_tree fndecl, bool incoming_p) | |
793 | { | |
9f62cb92 | 794 | if (!DECL_STATIC_CHAIN (fndecl)) |
531ca746 RH |
795 | return NULL; |
796 | ||
797 | if (incoming_p) | |
798 | { | |
531ca746 RH |
799 | #ifdef STATIC_CHAIN_INCOMING_REGNUM |
800 | return gen_rtx_REG (Pmode, STATIC_CHAIN_INCOMING_REGNUM); | |
801 | #endif | |
802 | } | |
803 | ||
531ca746 RH |
804 | #ifdef STATIC_CHAIN_REGNUM |
805 | return gen_rtx_REG (Pmode, STATIC_CHAIN_REGNUM); | |
806 | #endif | |
807 | ||
2b4fa409 RH |
808 | { |
809 | static bool issued_error; | |
810 | if (!issued_error) | |
811 | { | |
812 | issued_error = true; | |
813 | sorry ("nested functions not supported on this target"); | |
814 | } | |
815 | ||
816 | /* It really doesn't matter what we return here, so long at it | |
817 | doesn't cause the rest of the compiler to crash. */ | |
818 | return gen_rtx_MEM (Pmode, stack_pointer_rtx); | |
819 | } | |
531ca746 RH |
820 | } |
821 | ||
531ca746 RH |
822 | void |
823 | default_trampoline_init (rtx ARG_UNUSED (m_tramp), tree ARG_UNUSED (t_func), | |
824 | rtx ARG_UNUSED (r_chain)) | |
825 | { | |
531ca746 | 826 | sorry ("nested function trampolines not supported on this target"); |
531ca746 RH |
827 | } |
828 | ||
079e7538 NF |
829 | int |
830 | default_return_pops_args (tree fundecl ATTRIBUTE_UNUSED, | |
831 | tree funtype ATTRIBUTE_UNUSED, | |
832 | int size ATTRIBUTE_UNUSED) | |
833 | { | |
834 | return 0; | |
835 | } | |
836 | ||
a87cf97e | 837 | reg_class_t |
81f40b79 ILT |
838 | default_branch_target_register_class (void) |
839 | { | |
840 | return NO_REGS; | |
841 | } | |
842 | ||
55a2c322 VM |
843 | extern bool |
844 | default_lra_p (void) | |
845 | { | |
846 | return false; | |
847 | } | |
848 | ||
849 | int | |
850 | default_register_priority (int hard_regno ATTRIBUTE_UNUSED) | |
851 | { | |
852 | return 0; | |
853 | } | |
854 | ||
855 | extern bool | |
856 | default_different_addr_displacement_p (void) | |
857 | { | |
858 | return false; | |
859 | } | |
860 | ||
a87cf97e | 861 | reg_class_t |
8a99f6f9 | 862 | default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, |
a87cf97e | 863 | reg_class_t reload_class_i ATTRIBUTE_UNUSED, |
8a99f6f9 R |
864 | enum machine_mode reload_mode ATTRIBUTE_UNUSED, |
865 | secondary_reload_info *sri) | |
866 | { | |
48c54229 | 867 | enum reg_class rclass = NO_REGS; |
a87cf97e | 868 | enum reg_class reload_class = (enum reg_class) reload_class_i; |
8a99f6f9 R |
869 | |
870 | if (sri->prev_sri && sri->prev_sri->t_icode != CODE_FOR_nothing) | |
871 | { | |
872 | sri->icode = sri->prev_sri->t_icode; | |
873 | return NO_REGS; | |
874 | } | |
875 | #ifdef SECONDARY_INPUT_RELOAD_CLASS | |
876 | if (in_p) | |
48c54229 | 877 | rclass = SECONDARY_INPUT_RELOAD_CLASS (reload_class, reload_mode, x); |
8a99f6f9 R |
878 | #endif |
879 | #ifdef SECONDARY_OUTPUT_RELOAD_CLASS | |
880 | if (! in_p) | |
48c54229 | 881 | rclass = SECONDARY_OUTPUT_RELOAD_CLASS (reload_class, reload_mode, x); |
8a99f6f9 | 882 | #endif |
48c54229 | 883 | if (rclass != NO_REGS) |
8a99f6f9 | 884 | { |
f9621cc4 RS |
885 | enum insn_code icode |
886 | = direct_optab_handler (in_p ? reload_in_optab : reload_out_optab, | |
887 | reload_mode); | |
8a99f6f9 R |
888 | |
889 | if (icode != CODE_FOR_nothing | |
2ef6ce06 | 890 | && !insn_operand_matches (icode, in_p, x)) |
8a99f6f9 R |
891 | icode = CODE_FOR_nothing; |
892 | else if (icode != CODE_FOR_nothing) | |
893 | { | |
894 | const char *insn_constraint, *scratch_constraint; | |
895 | char insn_letter, scratch_letter; | |
896 | enum reg_class insn_class, scratch_class; | |
897 | ||
898 | gcc_assert (insn_data[(int) icode].n_operands == 3); | |
899 | insn_constraint = insn_data[(int) icode].operand[!in_p].constraint; | |
900 | if (!*insn_constraint) | |
901 | insn_class = ALL_REGS; | |
902 | else | |
903 | { | |
904 | if (in_p) | |
905 | { | |
906 | gcc_assert (*insn_constraint == '='); | |
907 | insn_constraint++; | |
908 | } | |
909 | insn_letter = *insn_constraint; | |
910 | insn_class | |
911 | = (insn_letter == 'r' ? GENERAL_REGS | |
912 | : REG_CLASS_FROM_CONSTRAINT ((unsigned char) insn_letter, | |
913 | insn_constraint)); | |
914 | gcc_assert (insn_class != NO_REGS); | |
915 | } | |
916 | ||
917 | scratch_constraint = insn_data[(int) icode].operand[2].constraint; | |
11e30dd8 HPN |
918 | /* The scratch register's constraint must start with "=&", |
919 | except for an input reload, where only "=" is necessary, | |
920 | and where it might be beneficial to re-use registers from | |
921 | the input. */ | |
8a99f6f9 | 922 | gcc_assert (scratch_constraint[0] == '=' |
11e30dd8 HPN |
923 | && (in_p || scratch_constraint[1] == '&')); |
924 | scratch_constraint++; | |
925 | if (*scratch_constraint == '&') | |
926 | scratch_constraint++; | |
8a99f6f9 R |
927 | scratch_letter = *scratch_constraint; |
928 | scratch_class | |
929 | = (scratch_letter == 'r' ? GENERAL_REGS | |
930 | : REG_CLASS_FROM_CONSTRAINT ((unsigned char) scratch_letter, | |
931 | scratch_constraint)); | |
932 | ||
933 | if (reg_class_subset_p (reload_class, insn_class)) | |
934 | { | |
48c54229 KG |
935 | gcc_assert (scratch_class == rclass); |
936 | rclass = NO_REGS; | |
8a99f6f9 R |
937 | } |
938 | else | |
48c54229 | 939 | rclass = insn_class; |
8a99f6f9 R |
940 | |
941 | } | |
48c54229 | 942 | if (rclass == NO_REGS) |
8a99f6f9 R |
943 | sri->icode = icode; |
944 | else | |
945 | sri->t_icode = icode; | |
946 | } | |
48c54229 | 947 | return rclass; |
8a99f6f9 R |
948 | } |
949 | ||
9b580a0b RH |
950 | /* By default, if flag_pic is true, then neither local nor global relocs |
951 | should be placed in readonly memory. */ | |
952 | ||
953 | int | |
954 | default_reloc_rw_mask (void) | |
955 | { | |
956 | return flag_pic ? 3 : 0; | |
957 | } | |
958 | ||
5234b8f5 DS |
959 | /* By default, do no modification. */ |
960 | tree default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED, | |
961 | tree id) | |
962 | { | |
963 | return id; | |
964 | } | |
965 | ||
5aea1e76 UW |
966 | /* Default to natural alignment for vector types. */ |
967 | HOST_WIDE_INT | |
968 | default_vector_alignment (const_tree type) | |
969 | { | |
970 | return tree_low_cst (TYPE_SIZE (type), 0); | |
971 | } | |
972 | ||
5b900a4c | 973 | bool |
3101faab | 974 | default_builtin_vector_alignment_reachable (const_tree type, bool is_packed) |
5b900a4c DN |
975 | { |
976 | if (is_packed) | |
977 | return false; | |
978 | ||
979 | /* Assuming that types whose size is > pointer-size are not guaranteed to be | |
980 | naturally aligned. */ | |
981 | if (tree_int_cst_compare (TYPE_SIZE (type), bitsize_int (POINTER_SIZE)) > 0) | |
982 | return false; | |
983 | ||
984 | /* Assuming that types whose size is <= pointer-size | |
985 | are naturally aligned. */ | |
986 | return true; | |
987 | } | |
988 | ||
0601d0cf | 989 | /* By default, assume that a target supports any factor of misalignment |
b8698a0f | 990 | memory access if it supports movmisalign patten. |
0601d0cf RE |
991 | is_packed is true if the memory access is defined in a packed struct. */ |
992 | bool | |
993 | default_builtin_support_vector_misalignment (enum machine_mode mode, | |
994 | const_tree type | |
995 | ATTRIBUTE_UNUSED, | |
996 | int misalignment | |
997 | ATTRIBUTE_UNUSED, | |
998 | bool is_packed | |
999 | ATTRIBUTE_UNUSED) | |
1000 | { | |
947131ba | 1001 | if (optab_handler (movmisalign_optab, mode) != CODE_FOR_nothing) |
0601d0cf RE |
1002 | return true; |
1003 | return false; | |
1004 | } | |
1005 | ||
26983c22 L |
1006 | /* By default, only attempt to parallelize bitwise operations, and |
1007 | possibly adds/subtracts using bit-twiddling. */ | |
1008 | ||
cc4b5170 RG |
1009 | enum machine_mode |
1010 | default_preferred_simd_mode (enum machine_mode mode ATTRIBUTE_UNUSED) | |
26983c22 | 1011 | { |
cc4b5170 | 1012 | return word_mode; |
26983c22 L |
1013 | } |
1014 | ||
767f865f RG |
1015 | /* By default only the size derived from the preferred vector mode |
1016 | is tried. */ | |
1017 | ||
1018 | unsigned int | |
1019 | default_autovectorize_vector_sizes (void) | |
1020 | { | |
1021 | return 0; | |
1022 | } | |
1023 | ||
92345349 BS |
1024 | /* By default, the cost model accumulates three separate costs (prologue, |
1025 | loop body, and epilogue) for a vectorized loop or block. So allocate an | |
1026 | array of three unsigned ints, set it to zero, and return its address. */ | |
c3e7ee41 BS |
1027 | |
1028 | void * | |
1029 | default_init_cost (struct loop *loop_info ATTRIBUTE_UNUSED) | |
1030 | { | |
92345349 BS |
1031 | unsigned *cost = XNEWVEC (unsigned, 3); |
1032 | cost[vect_prologue] = cost[vect_body] = cost[vect_epilogue] = 0; | |
c3e7ee41 BS |
1033 | return cost; |
1034 | } | |
1035 | ||
1036 | /* By default, the cost model looks up the cost of the given statement | |
1037 | kind and mode, multiplies it by the occurrence count, accumulates | |
92345349 | 1038 | it into the cost specified by WHERE, and returns the cost added. */ |
c3e7ee41 BS |
1039 | |
1040 | unsigned | |
1041 | default_add_stmt_cost (void *data, int count, enum vect_cost_for_stmt kind, | |
92345349 BS |
1042 | struct _stmt_vec_info *stmt_info, int misalign, |
1043 | enum vect_cost_model_location where) | |
c3e7ee41 BS |
1044 | { |
1045 | unsigned *cost = (unsigned *) data; | |
1046 | unsigned retval = 0; | |
1047 | ||
1048 | if (flag_vect_cost_model) | |
1049 | { | |
92345349 | 1050 | tree vectype = stmt_info ? stmt_vectype (stmt_info) : NULL_TREE; |
c3e7ee41 BS |
1051 | int stmt_cost = default_builtin_vectorization_cost (kind, vectype, |
1052 | misalign); | |
1053 | /* Statements in an inner loop relative to the loop being | |
1054 | vectorized are weighted more heavily. The value here is | |
1055 | arbitrary and could potentially be improved with analysis. */ | |
92345349 | 1056 | if (where == vect_body && stmt_info && stmt_in_inner_loop_p (stmt_info)) |
c3e7ee41 BS |
1057 | count *= 50; /* FIXME. */ |
1058 | ||
1059 | retval = (unsigned) (count * stmt_cost); | |
92345349 | 1060 | cost[where] += retval; |
c3e7ee41 BS |
1061 | } |
1062 | ||
1063 | return retval; | |
1064 | } | |
1065 | ||
92345349 | 1066 | /* By default, the cost model just returns the accumulated costs. */ |
c3e7ee41 | 1067 | |
92345349 BS |
1068 | void |
1069 | default_finish_cost (void *data, unsigned *prologue_cost, | |
1070 | unsigned *body_cost, unsigned *epilogue_cost) | |
c3e7ee41 | 1071 | { |
92345349 BS |
1072 | unsigned *cost = (unsigned *) data; |
1073 | *prologue_cost = cost[vect_prologue]; | |
1074 | *body_cost = cost[vect_body]; | |
1075 | *epilogue_cost = cost[vect_epilogue]; | |
c3e7ee41 BS |
1076 | } |
1077 | ||
1078 | /* Free the cost data. */ | |
1079 | ||
1080 | void | |
1081 | default_destroy_cost_data (void *data) | |
1082 | { | |
1083 | free (data); | |
1084 | } | |
1085 | ||
d4ebfa65 BE |
1086 | /* Determine whether or not a pointer mode is valid. Assume defaults |
1087 | of ptr_mode or Pmode - can be overridden. */ | |
1088 | bool | |
1089 | default_valid_pointer_mode (enum machine_mode mode) | |
1090 | { | |
1091 | return (mode == ptr_mode || mode == Pmode); | |
1092 | } | |
1093 | ||
7352c013 RG |
1094 | /* Determine whether the memory reference specified by REF may alias |
1095 | the C libraries errno location. */ | |
1096 | bool | |
1097 | default_ref_may_alias_errno (ao_ref *ref) | |
1098 | { | |
1099 | tree base = ao_ref_base (ref); | |
1100 | /* The default implementation assumes the errno location is | |
1101 | a declaration of type int or is always accessed via a | |
1102 | pointer to int. We assume that accesses to errno are | |
1103 | not deliberately obfuscated (even in conforming ways). */ | |
1104 | if (TYPE_UNSIGNED (TREE_TYPE (base)) | |
1105 | || TYPE_MODE (TREE_TYPE (base)) != TYPE_MODE (integer_type_node)) | |
1106 | return false; | |
1107 | /* The default implementation assumes an errno location | |
1108 | declaration is never defined in the current compilation unit. */ | |
1109 | if (DECL_P (base) | |
1110 | && !TREE_STATIC (base)) | |
1111 | return true; | |
1112 | else if (TREE_CODE (base) == MEM_REF | |
1113 | && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME) | |
1114 | { | |
1115 | struct ptr_info_def *pi = SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)); | |
1116 | return !pi || pi->pt.anything || pi->pt.nonlocal; | |
1117 | } | |
1118 | return false; | |
1119 | } | |
1120 | ||
d4ebfa65 BE |
1121 | /* Return the mode for a pointer to a given ADDRSPACE, defaulting to ptr_mode |
1122 | for the generic address space only. */ | |
1123 | ||
1124 | enum machine_mode | |
1125 | default_addr_space_pointer_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) | |
1126 | { | |
1127 | gcc_assert (ADDR_SPACE_GENERIC_P (addrspace)); | |
1128 | return ptr_mode; | |
1129 | } | |
1130 | ||
1131 | /* Return the mode for an address in a given ADDRSPACE, defaulting to Pmode | |
1132 | for the generic address space only. */ | |
1133 | ||
1134 | enum machine_mode | |
1135 | default_addr_space_address_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) | |
1136 | { | |
1137 | gcc_assert (ADDR_SPACE_GENERIC_P (addrspace)); | |
1138 | return Pmode; | |
1139 | } | |
1140 | ||
1141 | /* Named address space version of valid_pointer_mode. */ | |
1142 | ||
1143 | bool | |
1144 | default_addr_space_valid_pointer_mode (enum machine_mode mode, addr_space_t as) | |
1145 | { | |
1146 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1147 | return (mode == targetm.addr_space.pointer_mode (as) | |
1148 | || mode == targetm.addr_space.address_mode (as)); | |
1149 | ||
1150 | return targetm.valid_pointer_mode (mode); | |
1151 | } | |
1152 | ||
1153 | /* Some places still assume that all pointer or address modes are the | |
1154 | standard Pmode and ptr_mode. These optimizations become invalid if | |
1155 | the target actually supports multiple different modes. For now, | |
1156 | we disable such optimizations on such targets, using this function. */ | |
1157 | ||
1158 | bool | |
1159 | target_default_pointer_address_modes_p (void) | |
1160 | { | |
1161 | if (targetm.addr_space.address_mode != default_addr_space_address_mode) | |
1162 | return false; | |
1163 | if (targetm.addr_space.pointer_mode != default_addr_space_pointer_mode) | |
1164 | return false; | |
1165 | ||
1166 | return true; | |
1167 | } | |
1168 | ||
09e881c9 BE |
1169 | /* Named address space version of legitimate_address_p. */ |
1170 | ||
1171 | bool | |
1172 | default_addr_space_legitimate_address_p (enum machine_mode mode, rtx mem, | |
1173 | bool strict, addr_space_t as) | |
1174 | { | |
1175 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1176 | gcc_unreachable (); | |
1177 | ||
1178 | return targetm.legitimate_address_p (mode, mem, strict); | |
1179 | } | |
1180 | ||
1181 | /* Named address space version of LEGITIMIZE_ADDRESS. */ | |
1182 | ||
1183 | rtx | |
1184 | default_addr_space_legitimize_address (rtx x, rtx oldx, | |
1185 | enum machine_mode mode, addr_space_t as) | |
1186 | { | |
1187 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1188 | return x; | |
1189 | ||
1190 | return targetm.legitimize_address (x, oldx, mode); | |
1191 | } | |
1192 | ||
1193 | /* The default hook for determining if one named address space is a subset of | |
1194 | another and to return which address space to use as the common address | |
1195 | space. */ | |
1196 | ||
1197 | bool | |
1198 | default_addr_space_subset_p (addr_space_t subset, addr_space_t superset) | |
1199 | { | |
1200 | return (subset == superset); | |
1201 | } | |
1202 | ||
1203 | /* The default hook for TARGET_ADDR_SPACE_CONVERT. This hook should never be | |
1204 | called for targets with only a generic address space. */ | |
1205 | ||
1206 | rtx | |
1207 | default_addr_space_convert (rtx op ATTRIBUTE_UNUSED, | |
1208 | tree from_type ATTRIBUTE_UNUSED, | |
1209 | tree to_type ATTRIBUTE_UNUSED) | |
1210 | { | |
1211 | gcc_unreachable (); | |
1212 | } | |
1213 | ||
dbc42c44 AS |
1214 | bool |
1215 | default_hard_regno_scratch_ok (unsigned int regno ATTRIBUTE_UNUSED) | |
1216 | { | |
1217 | return true; | |
1218 | } | |
1219 | ||
cbda7dc6 AS |
1220 | /* The default implementation of TARGET_MODE_DEPENDENT_ADDRESS_P. */ |
1221 | ||
1222 | bool | |
5bfed9a9 GJL |
1223 | default_mode_dependent_address_p (const_rtx addr ATTRIBUTE_UNUSED, |
1224 | addr_space_t addrspace ATTRIBUTE_UNUSED) | |
cbda7dc6 | 1225 | { |
cbda7dc6 | 1226 | return false; |
cbda7dc6 AS |
1227 | } |
1228 | ||
ab442df7 MM |
1229 | bool |
1230 | default_target_option_valid_attribute_p (tree ARG_UNUSED (fndecl), | |
1231 | tree ARG_UNUSED (name), | |
1232 | tree ARG_UNUSED (args), | |
1233 | int ARG_UNUSED (flags)) | |
1234 | { | |
5779e713 MM |
1235 | warning (OPT_Wattributes, |
1236 | "target attribute is not supported on this machine"); | |
1237 | ||
1238 | return false; | |
1239 | } | |
1240 | ||
1241 | bool | |
1242 | default_target_option_pragma_parse (tree ARG_UNUSED (args), | |
1243 | tree ARG_UNUSED (pop_target)) | |
1244 | { | |
1245 | warning (OPT_Wpragmas, | |
1246 | "#pragma GCC target is not supported for this machine"); | |
1247 | ||
ab442df7 MM |
1248 | return false; |
1249 | } | |
1250 | ||
1251 | bool | |
5cec9f59 | 1252 | default_target_can_inline_p (tree caller, tree callee) |
ab442df7 MM |
1253 | { |
1254 | bool ret = false; | |
1255 | tree callee_opts = DECL_FUNCTION_SPECIFIC_TARGET (callee); | |
1256 | tree caller_opts = DECL_FUNCTION_SPECIFIC_TARGET (caller); | |
1257 | ||
1258 | /* If callee has no option attributes, then it is ok to inline */ | |
1259 | if (!callee_opts) | |
1260 | ret = true; | |
1261 | ||
1262 | /* If caller has no option attributes, but callee does then it is not ok to | |
1263 | inline */ | |
1264 | else if (!caller_opts) | |
1265 | ret = false; | |
1266 | ||
dd5a833e MS |
1267 | /* If both caller and callee have attributes, assume that if the |
1268 | pointer is different, the two functions have different target | |
1269 | options since build_target_option_node uses a hash table for the | |
1270 | options. */ | |
ab442df7 MM |
1271 | else |
1272 | ret = (callee_opts == caller_opts); | |
1273 | ||
1274 | return ret; | |
1275 | } | |
1276 | ||
e6ff3083 AS |
1277 | #ifndef HAVE_casesi |
1278 | # define HAVE_casesi 0 | |
1279 | #endif | |
1280 | ||
1281 | /* If the machine does not have a case insn that compares the bounds, | |
1282 | this means extra overhead for dispatch tables, which raises the | |
1283 | threshold for using them. */ | |
1284 | ||
0cd2402d SB |
1285 | unsigned int |
1286 | default_case_values_threshold (void) | |
e6ff3083 AS |
1287 | { |
1288 | return (HAVE_casesi ? 4 : 5); | |
1289 | } | |
1290 | ||
2929029c WG |
1291 | bool |
1292 | default_have_conditional_execution (void) | |
1293 | { | |
1294 | #ifdef HAVE_conditional_execution | |
1295 | return HAVE_conditional_execution; | |
1296 | #else | |
1297 | return false; | |
1298 | #endif | |
1299 | } | |
1300 | ||
0a35513e AH |
1301 | tree |
1302 | default_builtin_tm_load_store (tree ARG_UNUSED (type)) | |
1303 | { | |
1304 | return NULL_TREE; | |
1305 | } | |
1306 | ||
f5c21ef3 AS |
1307 | /* Compute cost of moving registers to/from memory. */ |
1308 | ||
1309 | int | |
1310 | default_memory_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, | |
a87cf97e | 1311 | reg_class_t rclass ATTRIBUTE_UNUSED, |
f5c21ef3 AS |
1312 | bool in ATTRIBUTE_UNUSED) |
1313 | { | |
1314 | #ifndef MEMORY_MOVE_COST | |
a87cf97e | 1315 | return (4 + memory_move_secondary_cost (mode, (enum reg_class) rclass, in)); |
f5c21ef3 | 1316 | #else |
a87cf97e | 1317 | return MEMORY_MOVE_COST (mode, (enum reg_class) rclass, in); |
f5c21ef3 AS |
1318 | #endif |
1319 | } | |
1320 | ||
de8f4b07 AS |
1321 | /* Compute cost of moving data from a register of class FROM to one of |
1322 | TO, using MODE. */ | |
1323 | ||
1324 | int | |
1325 | default_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, | |
a87cf97e JR |
1326 | reg_class_t from ATTRIBUTE_UNUSED, |
1327 | reg_class_t to ATTRIBUTE_UNUSED) | |
de8f4b07 AS |
1328 | { |
1329 | #ifndef REGISTER_MOVE_COST | |
1330 | return 2; | |
1331 | #else | |
a87cf97e | 1332 | return REGISTER_MOVE_COST (mode, (enum reg_class) from, (enum reg_class) to); |
de8f4b07 AS |
1333 | #endif |
1334 | } | |
1335 | ||
3c5273a9 KT |
1336 | bool |
1337 | default_profile_before_prologue (void) | |
1338 | { | |
1339 | #ifdef PROFILE_BEFORE_PROLOGUE | |
1340 | return true; | |
1341 | #else | |
1342 | return false; | |
1343 | #endif | |
1344 | } | |
1345 | ||
fba42e24 AS |
1346 | /* The default implementation of TARGET_PREFERRED_RELOAD_CLASS. */ |
1347 | ||
1348 | reg_class_t | |
1349 | default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, | |
1350 | reg_class_t rclass) | |
1351 | { | |
1352 | #ifdef PREFERRED_RELOAD_CLASS | |
1353 | return (reg_class_t) PREFERRED_RELOAD_CLASS (x, (enum reg_class) rclass); | |
1354 | #else | |
1355 | return rclass; | |
1356 | #endif | |
1357 | } | |
1358 | ||
abd26bfb AS |
1359 | /* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS. */ |
1360 | ||
1361 | reg_class_t | |
1362 | default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
1363 | reg_class_t rclass) | |
1364 | { | |
abd26bfb | 1365 | return rclass; |
abd26bfb AS |
1366 | } |
1367 | ||
5f286f4a YQ |
1368 | /* The default implementation of TARGET_PREFERRED_RENAME_CLASS. */ |
1369 | reg_class_t | |
1370 | default_preferred_rename_class (reg_class_t rclass ATTRIBUTE_UNUSED) | |
1371 | { | |
1372 | return NO_REGS; | |
1373 | } | |
1374 | ||
07b8f0a8 AS |
1375 | /* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P. */ |
1376 | ||
1377 | bool | |
1378 | default_class_likely_spilled_p (reg_class_t rclass) | |
1379 | { | |
07b8f0a8 | 1380 | return (reg_class_size[(int) rclass] == 1); |
07b8f0a8 AS |
1381 | } |
1382 | ||
a8c44c52 AS |
1383 | /* The default implementation of TARGET_CLASS_MAX_NREGS. */ |
1384 | ||
1385 | unsigned char | |
1386 | default_class_max_nregs (reg_class_t rclass ATTRIBUTE_UNUSED, | |
1387 | enum machine_mode mode ATTRIBUTE_UNUSED) | |
1388 | { | |
1389 | #ifdef CLASS_MAX_NREGS | |
1390 | return (unsigned char) CLASS_MAX_NREGS ((enum reg_class) rclass, mode); | |
1391 | #else | |
1392 | return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD); | |
1393 | #endif | |
1394 | } | |
1395 | ||
f0a0390e RH |
1396 | /* Determine the debugging unwind mechanism for the target. */ |
1397 | ||
1398 | enum unwind_info_type | |
1399 | default_debug_unwind_info (void) | |
1400 | { | |
1401 | /* If the target wants to force the use of dwarf2 unwind info, let it. */ | |
1402 | /* ??? Change all users to the hook, then poison this. */ | |
1403 | #ifdef DWARF2_FRAME_INFO | |
1404 | if (DWARF2_FRAME_INFO) | |
1405 | return UI_DWARF2; | |
1406 | #endif | |
1407 | ||
1408 | /* Otherwise, only turn it on if dwarf2 debugging is enabled. */ | |
1409 | #ifdef DWARF2_DEBUGGING_INFO | |
1410 | if (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) | |
1411 | return UI_DWARF2; | |
1412 | #endif | |
1413 | ||
1414 | return UI_NONE; | |
1415 | } | |
1416 | ||
ffa88471 SE |
1417 | /* To be used by targets where reg_raw_mode doesn't return the right |
1418 | mode for registers used in apply_builtin_return and apply_builtin_arg. */ | |
1419 | ||
1420 | enum machine_mode | |
1421 | default_get_reg_raw_mode(int regno) | |
1422 | { | |
1423 | return reg_raw_mode[regno]; | |
1424 | } | |
1425 | ||
a803773f JM |
1426 | /* Return true if the state of option OPTION should be stored in PCH files |
1427 | and checked by default_pch_valid_p. Store the option's current state | |
1428 | in STATE if so. */ | |
1429 | ||
1430 | static inline bool | |
1431 | option_affects_pch_p (int option, struct cl_option_state *state) | |
1432 | { | |
1433 | if ((cl_options[option].flags & CL_TARGET) == 0) | |
1434 | return false; | |
1435 | if (option_flag_var (option, &global_options) == &target_flags) | |
1436 | if (targetm.check_pch_target_flags) | |
1437 | return false; | |
1438 | return get_option_state (&global_options, option, state); | |
1439 | } | |
1440 | ||
1441 | /* Default version of get_pch_validity. | |
1442 | By default, every flag difference is fatal; that will be mostly right for | |
1443 | most targets, but completely right for very few. */ | |
1444 | ||
1445 | void * | |
1446 | default_get_pch_validity (size_t *sz) | |
1447 | { | |
1448 | struct cl_option_state state; | |
1449 | size_t i; | |
1450 | char *result, *r; | |
1451 | ||
1452 | *sz = 2; | |
1453 | if (targetm.check_pch_target_flags) | |
1454 | *sz += sizeof (target_flags); | |
1455 | for (i = 0; i < cl_options_count; i++) | |
1456 | if (option_affects_pch_p (i, &state)) | |
1457 | *sz += state.size; | |
1458 | ||
1459 | result = r = XNEWVEC (char, *sz); | |
1460 | r[0] = flag_pic; | |
1461 | r[1] = flag_pie; | |
1462 | r += 2; | |
1463 | if (targetm.check_pch_target_flags) | |
1464 | { | |
1465 | memcpy (r, &target_flags, sizeof (target_flags)); | |
1466 | r += sizeof (target_flags); | |
1467 | } | |
1468 | ||
1469 | for (i = 0; i < cl_options_count; i++) | |
1470 | if (option_affects_pch_p (i, &state)) | |
1471 | { | |
1472 | memcpy (r, state.data, state.size); | |
1473 | r += state.size; | |
1474 | } | |
1475 | ||
1476 | return result; | |
1477 | } | |
1478 | ||
1479 | /* Return a message which says that a PCH file was created with a different | |
1480 | setting of OPTION. */ | |
1481 | ||
1482 | static const char * | |
1483 | pch_option_mismatch (const char *option) | |
1484 | { | |
1485 | char *r; | |
1486 | ||
1487 | asprintf (&r, _("created and used with differing settings of '%s'"), option); | |
1488 | if (r == NULL) | |
1489 | return _("out of memory"); | |
1490 | return r; | |
1491 | } | |
1492 | ||
1493 | /* Default version of pch_valid_p. */ | |
1494 | ||
1495 | const char * | |
1496 | default_pch_valid_p (const void *data_p, size_t len) | |
1497 | { | |
1498 | struct cl_option_state state; | |
1499 | const char *data = (const char *)data_p; | |
1500 | size_t i; | |
1501 | ||
1502 | /* -fpic and -fpie also usually make a PCH invalid. */ | |
1503 | if (data[0] != flag_pic) | |
1504 | return _("created and used with different settings of -fpic"); | |
1505 | if (data[1] != flag_pie) | |
1506 | return _("created and used with different settings of -fpie"); | |
1507 | data += 2; | |
1508 | ||
1509 | /* Check target_flags. */ | |
1510 | if (targetm.check_pch_target_flags) | |
1511 | { | |
1512 | int tf; | |
1513 | const char *r; | |
1514 | ||
1515 | memcpy (&tf, data, sizeof (target_flags)); | |
1516 | data += sizeof (target_flags); | |
1517 | len -= sizeof (target_flags); | |
1518 | r = targetm.check_pch_target_flags (tf); | |
1519 | if (r != NULL) | |
1520 | return r; | |
1521 | } | |
1522 | ||
1523 | for (i = 0; i < cl_options_count; i++) | |
1524 | if (option_affects_pch_p (i, &state)) | |
1525 | { | |
1526 | if (memcmp (data, state.data, state.size) != 0) | |
1527 | return pch_option_mismatch (cl_options[i].opt_text); | |
1528 | data += state.size; | |
1529 | len -= state.size; | |
1530 | } | |
1531 | ||
1532 | return NULL; | |
1533 | } | |
1534 | ||
d9886a9e L |
1535 | /* Default version of member_type_forces_blk. */ |
1536 | ||
1537 | bool | |
1538 | default_member_type_forces_blk (const_tree, enum machine_mode) | |
1539 | { | |
1540 | return false; | |
1541 | } | |
1542 | ||
7d69de61 | 1543 | #include "gt-targhooks.h" |