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61f71b34 | 1 | /* Default target hook functions. |
cbe34bb5 | 2 | Copyright (C) 2003-2017 Free Software Foundation, Inc. |
61f71b34 DD |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
61f71b34 DD |
9 | version. |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
61f71b34 | 19 | |
dd37c5a0 DD |
20 | /* The migration of target macros to target hooks works as follows: |
21 | ||
22 | 1. Create a target hook that uses the existing target macros to | |
23 | implement the same functionality. | |
24 | ||
25 | 2. Convert all the MI files to use the hook instead of the macro. | |
26 | ||
27 | 3. Repeat for a majority of the remaining target macros. This will | |
28 | take some time. | |
29 | ||
30 | 4. Tell target maintainers to start migrating. | |
31 | ||
32 | 5. Eventually convert the backends to override the hook instead of | |
33 | defining the macros. This will take some time too. | |
34 | ||
35 | 6. TBD when, poison the macros. Unmigrated targets will break at | |
36 | this point. | |
37 | ||
38 | Note that we expect steps 1-3 to be done by the people that | |
39 | understand what the MI does with each macro, and step 5 to be done | |
40 | by the target maintainers for their respective targets. | |
41 | ||
42 | Note that steps 1 and 2 don't have to be done together, but no | |
43 | target can override the new hook until step 2 is complete for it. | |
44 | ||
45 | Once the macros are poisoned, we will revert to the old migration | |
46 | rules - migrate the macro, callers, and targets all at once. This | |
47 | comment can thus be removed at that point. */ | |
48 | ||
61f71b34 DD |
49 | #include "config.h" |
50 | #include "system.h" | |
51 | #include "coretypes.h" | |
957060b5 AM |
52 | #include "target.h" |
53 | #include "function.h" | |
61f71b34 DD |
54 | #include "rtl.h" |
55 | #include "tree.h" | |
957060b5 AM |
56 | #include "tree-ssa-alias.h" |
57 | #include "gimple-expr.h" | |
4d0cdd0c | 58 | #include "memmodel.h" |
957060b5 AM |
59 | #include "tm_p.h" |
60 | #include "stringpool.h" | |
f90aa46c | 61 | #include "tree-vrp.h" |
957060b5 | 62 | #include "tree-ssanames.h" |
357067f2 | 63 | #include "profile-count.h" |
957060b5 AM |
64 | #include "optabs.h" |
65 | #include "regs.h" | |
957060b5 AM |
66 | #include "recog.h" |
67 | #include "diagnostic-core.h" | |
40e23961 | 68 | #include "fold-const.h" |
d8a2d370 DN |
69 | #include "stor-layout.h" |
70 | #include "varasm.h" | |
36566b39 | 71 | #include "flags.h" |
36566b39 PK |
72 | #include "explow.h" |
73 | #include "calls.h" | |
61f71b34 | 74 | #include "expr.h" |
d84a4ef1 | 75 | #include "output.h" |
8a99f6f9 | 76 | #include "reload.h" |
a803773f JM |
77 | #include "intl.h" |
78 | #include "opts.h" | |
45b0be94 | 79 | #include "gimplify.h" |
e914c11a JG |
80 | #include "predict.h" |
81 | #include "params.h" | |
c65699ef | 82 | #include "real.h" |
61f71b34 | 83 | |
6dd53648 | 84 | |
c6c3dba9 | 85 | bool |
ef4bddc2 | 86 | default_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED, |
c6c3dba9 PB |
87 | rtx addr ATTRIBUTE_UNUSED, |
88 | bool strict ATTRIBUTE_UNUSED) | |
89 | { | |
90 | #ifdef GO_IF_LEGITIMATE_ADDRESS | |
91 | /* Defer to the old implementation using a goto. */ | |
92 | if (strict) | |
93 | return strict_memory_address_p (mode, addr); | |
94 | else | |
95 | return memory_address_p (mode, addr); | |
96 | #else | |
97 | gcc_unreachable (); | |
98 | #endif | |
99 | } | |
100 | ||
6773a41c RO |
101 | void |
102 | default_external_libcall (rtx fun ATTRIBUTE_UNUSED) | |
103 | { | |
104 | #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL | |
c3284718 | 105 | ASM_OUTPUT_EXTERNAL_LIBCALL (asm_out_file, fun); |
6773a41c RO |
106 | #endif |
107 | } | |
108 | ||
215b063c PB |
109 | int |
110 | default_unspec_may_trap_p (const_rtx x, unsigned flags) | |
111 | { | |
112 | int i; | |
113 | ||
c84a808e EB |
114 | /* Any floating arithmetic may trap. */ |
115 | if ((SCALAR_FLOAT_MODE_P (GET_MODE (x)) && flag_trapping_math)) | |
215b063c PB |
116 | return 1; |
117 | ||
118 | for (i = 0; i < XVECLEN (x, 0); ++i) | |
119 | { | |
120 | if (may_trap_p_1 (XVECEXP (x, 0, i), flags)) | |
121 | return 1; | |
122 | } | |
123 | ||
124 | return 0; | |
125 | } | |
126 | ||
ef4bddc2 | 127 | machine_mode |
cde0f3fd | 128 | default_promote_function_mode (const_tree type ATTRIBUTE_UNUSED, |
ef4bddc2 | 129 | machine_mode mode, |
cde0f3fd PB |
130 | int *punsignedp ATTRIBUTE_UNUSED, |
131 | const_tree funtype ATTRIBUTE_UNUSED, | |
132 | int for_return ATTRIBUTE_UNUSED) | |
133 | { | |
5e617be8 | 134 | if (type != NULL_TREE && for_return == 2) |
666e3ceb | 135 | return promote_mode (type, mode, punsignedp); |
cde0f3fd PB |
136 | return mode; |
137 | } | |
138 | ||
ef4bddc2 | 139 | machine_mode |
cde0f3fd | 140 | default_promote_function_mode_always_promote (const_tree type, |
ef4bddc2 | 141 | machine_mode mode, |
cde0f3fd PB |
142 | int *punsignedp, |
143 | const_tree funtype ATTRIBUTE_UNUSED, | |
144 | int for_return ATTRIBUTE_UNUSED) | |
145 | { | |
146 | return promote_mode (type, mode, punsignedp); | |
147 | } | |
148 | ||
ef4bddc2 RS |
149 | machine_mode |
150 | default_cc_modes_compatible (machine_mode m1, machine_mode m2) | |
e129d93a ILT |
151 | { |
152 | if (m1 == m2) | |
153 | return m1; | |
154 | return VOIDmode; | |
155 | } | |
156 | ||
61f71b34 | 157 | bool |
586de218 KG |
158 | default_return_in_memory (const_tree type, |
159 | const_tree fntype ATTRIBUTE_UNUSED) | |
61f71b34 | 160 | { |
33d05111 | 161 | return (TYPE_MODE (type) == BLKmode); |
61f71b34 DD |
162 | } |
163 | ||
506d7b68 PB |
164 | rtx |
165 | default_legitimize_address (rtx x, rtx orig_x ATTRIBUTE_UNUSED, | |
ef4bddc2 | 166 | machine_mode mode ATTRIBUTE_UNUSED) |
506d7b68 PB |
167 | { |
168 | return x; | |
169 | } | |
170 | ||
14133a4d KK |
171 | bool |
172 | default_legitimize_address_displacement (rtx *disp ATTRIBUTE_UNUSED, | |
173 | rtx *offset ATTRIBUTE_UNUSED, | |
174 | machine_mode mode ATTRIBUTE_UNUSED) | |
175 | { | |
176 | return false; | |
177 | } | |
178 | ||
61f71b34 DD |
179 | rtx |
180 | default_expand_builtin_saveregs (void) | |
181 | { | |
61f71b34 DD |
182 | error ("__builtin_saveregs not supported by this target"); |
183 | return const0_rtx; | |
61f71b34 DD |
184 | } |
185 | ||
186 | void | |
d5cc9181 | 187 | default_setup_incoming_varargs (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 188 | machine_mode mode ATTRIBUTE_UNUSED, |
61f71b34 DD |
189 | tree type ATTRIBUTE_UNUSED, |
190 | int *pretend_arg_size ATTRIBUTE_UNUSED, | |
191 | int second_time ATTRIBUTE_UNUSED) | |
192 | { | |
61f71b34 DD |
193 | } |
194 | ||
d6da68b9 KH |
195 | /* The default implementation of TARGET_BUILTIN_SETJMP_FRAME_VALUE. */ |
196 | ||
197 | rtx | |
198 | default_builtin_setjmp_frame_value (void) | |
199 | { | |
200 | return virtual_stack_vars_rtx; | |
201 | } | |
202 | ||
3a4d587b | 203 | /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns false. */ |
8dfa8fcd | 204 | |
61f71b34 | 205 | bool |
d5cc9181 | 206 | hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t ca ATTRIBUTE_UNUSED) |
61f71b34 | 207 | { |
b602b7b6 | 208 | return false; |
61f71b34 DD |
209 | } |
210 | ||
211 | bool | |
d5cc9181 | 212 | default_pretend_outgoing_varargs_named (cumulative_args_t ca ATTRIBUTE_UNUSED) |
61f71b34 | 213 | { |
3a4d587b AM |
214 | return (targetm.calls.setup_incoming_varargs |
215 | != default_setup_incoming_varargs); | |
61f71b34 | 216 | } |
c6e8c921 | 217 | |
ef4bddc2 | 218 | machine_mode |
93f90be6 FJ |
219 | default_eh_return_filter_mode (void) |
220 | { | |
7b0518e3 | 221 | return targetm.unwind_word_mode (); |
93f90be6 FJ |
222 | } |
223 | ||
ef4bddc2 | 224 | machine_mode |
c7ff6e7a AK |
225 | default_libgcc_cmp_return_mode (void) |
226 | { | |
227 | return word_mode; | |
228 | } | |
229 | ||
ef4bddc2 | 230 | machine_mode |
c7ff6e7a AK |
231 | default_libgcc_shift_count_mode (void) |
232 | { | |
233 | return word_mode; | |
234 | } | |
235 | ||
ef4bddc2 | 236 | machine_mode |
7b0518e3 UW |
237 | default_unwind_word_mode (void) |
238 | { | |
239 | return word_mode; | |
240 | } | |
241 | ||
273a2526 RS |
242 | /* The default implementation of TARGET_SHIFT_TRUNCATION_MASK. */ |
243 | ||
244 | unsigned HOST_WIDE_INT | |
ef4bddc2 | 245 | default_shift_truncation_mask (machine_mode mode) |
273a2526 RS |
246 | { |
247 | return SHIFT_COUNT_TRUNCATED ? GET_MODE_BITSIZE (mode) - 1 : 0; | |
248 | } | |
249 | ||
bc23502b PB |
250 | /* The default implementation of TARGET_MIN_DIVISIONS_FOR_RECIP_MUL. */ |
251 | ||
252 | unsigned int | |
ef4bddc2 | 253 | default_min_divisions_for_recip_mul (machine_mode mode ATTRIBUTE_UNUSED) |
bc23502b PB |
254 | { |
255 | return have_insn_for (DIV, mode) ? 3 : 2; | |
256 | } | |
257 | ||
b12cbf2c AN |
258 | /* The default implementation of TARGET_MODE_REP_EXTENDED. */ |
259 | ||
260 | int | |
ef4bddc2 RS |
261 | default_mode_rep_extended (machine_mode mode ATTRIBUTE_UNUSED, |
262 | machine_mode mode_rep ATTRIBUTE_UNUSED) | |
b12cbf2c AN |
263 | { |
264 | return UNKNOWN; | |
265 | } | |
266 | ||
c6e8c921 | 267 | /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns true. */ |
0938c9e8 | 268 | |
c6e8c921 | 269 | bool |
d5cc9181 | 270 | hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t a ATTRIBUTE_UNUSED) |
c6e8c921 GK |
271 | { |
272 | return true; | |
273 | } | |
4185ae53 | 274 | |
c77cd3d1 UB |
275 | /* Return machine mode for non-standard suffix |
276 | or VOIDmode if non-standard suffixes are unsupported. */ | |
ef4bddc2 | 277 | machine_mode |
c77cd3d1 UB |
278 | default_mode_for_suffix (char suffix ATTRIBUTE_UNUSED) |
279 | { | |
280 | return VOIDmode; | |
281 | } | |
4185ae53 PB |
282 | |
283 | /* The generic C++ ABI specifies this is a 64-bit value. */ | |
284 | tree | |
285 | default_cxx_guard_type (void) | |
286 | { | |
287 | return long_long_integer_type_node; | |
288 | } | |
46e995e0 | 289 | |
46e995e0 PB |
290 | /* Returns the size of the cookie to use when allocating an array |
291 | whose elements have the indicated TYPE. Assumes that it is already | |
292 | known that a cookie is needed. */ | |
293 | ||
294 | tree | |
295 | default_cxx_get_cookie_size (tree type) | |
296 | { | |
297 | tree cookie_size; | |
298 | ||
299 | /* We need to allocate an additional max (sizeof (size_t), alignof | |
300 | (true_type)) bytes. */ | |
301 | tree sizetype_size; | |
302 | tree type_align; | |
a1c496cb | 303 | |
46e995e0 PB |
304 | sizetype_size = size_in_bytes (sizetype); |
305 | type_align = size_int (TYPE_ALIGN_UNIT (type)); | |
807e902e | 306 | if (tree_int_cst_lt (type_align, sizetype_size)) |
46e995e0 PB |
307 | cookie_size = sizetype_size; |
308 | else | |
309 | cookie_size = type_align; | |
310 | ||
311 | return cookie_size; | |
312 | } | |
8cd5a4e0 | 313 | |
8cd5a4e0 RH |
314 | /* Return true if a parameter must be passed by reference. This version |
315 | of the TARGET_PASS_BY_REFERENCE hook uses just MUST_PASS_IN_STACK. */ | |
316 | ||
317 | bool | |
d5cc9181 | 318 | hook_pass_by_reference_must_pass_in_stack (cumulative_args_t c ATTRIBUTE_UNUSED, |
ef4bddc2 | 319 | machine_mode mode ATTRIBUTE_UNUSED, const_tree type ATTRIBUTE_UNUSED, |
8cd5a4e0 RH |
320 | bool named_arg ATTRIBUTE_UNUSED) |
321 | { | |
322 | return targetm.calls.must_pass_in_stack (mode, type); | |
323 | } | |
951120ea | 324 | |
6cdd5672 RH |
325 | /* Return true if a parameter follows callee copies conventions. This |
326 | version of the hook is true for all named arguments. */ | |
327 | ||
328 | bool | |
d5cc9181 | 329 | hook_callee_copies_named (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 330 | machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 331 | const_tree type ATTRIBUTE_UNUSED, bool named) |
6cdd5672 RH |
332 | { |
333 | return named; | |
334 | } | |
951120ea | 335 | |
6e2188e0 NF |
336 | /* Emit to STREAM the assembler syntax for insn operand X. */ |
337 | ||
338 | void | |
339 | default_print_operand (FILE *stream ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, | |
340 | int code ATTRIBUTE_UNUSED) | |
341 | { | |
342 | #ifdef PRINT_OPERAND | |
343 | PRINT_OPERAND (stream, x, code); | |
344 | #else | |
345 | gcc_unreachable (); | |
346 | #endif | |
347 | } | |
348 | ||
349 | /* Emit to STREAM the assembler syntax for an insn operand whose memory | |
350 | address is X. */ | |
351 | ||
352 | void | |
353 | default_print_operand_address (FILE *stream ATTRIBUTE_UNUSED, | |
cc8ca59e | 354 | machine_mode /*mode*/, |
6e2188e0 NF |
355 | rtx x ATTRIBUTE_UNUSED) |
356 | { | |
357 | #ifdef PRINT_OPERAND_ADDRESS | |
358 | PRINT_OPERAND_ADDRESS (stream, x); | |
359 | #else | |
360 | gcc_unreachable (); | |
361 | #endif | |
362 | } | |
363 | ||
364 | /* Return true if CODE is a valid punctuation character for the | |
365 | `print_operand' hook. */ | |
366 | ||
367 | bool | |
368 | default_print_operand_punct_valid_p (unsigned char code ATTRIBUTE_UNUSED) | |
369 | { | |
370 | #ifdef PRINT_OPERAND_PUNCT_VALID_P | |
371 | return PRINT_OPERAND_PUNCT_VALID_P (code); | |
372 | #else | |
373 | return false; | |
374 | #endif | |
375 | } | |
376 | ||
77754180 DK |
377 | /* The default implementation of TARGET_MANGLE_ASSEMBLER_NAME. */ |
378 | tree | |
379 | default_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED) | |
380 | { | |
381 | const char *skipped = name + (*name == '*' ? 1 : 0); | |
382 | const char *stripped = targetm.strip_name_encoding (skipped); | |
383 | if (*name != '*' && user_label_prefix[0]) | |
384 | stripped = ACONCAT ((user_label_prefix, stripped, NULL)); | |
385 | return get_identifier (stripped); | |
386 | } | |
387 | ||
6dd53648 RH |
388 | /* True if MODE is valid for the target. By "valid", we mean able to |
389 | be manipulated in non-trivial ways. In particular, this means all | |
390 | the arithmetic is supported. | |
391 | ||
392 | By default we guess this means that any C type is supported. If | |
393 | we can't map the mode back to a type that would be available in C, | |
394 | then reject it. Special case, here, is the double-word arithmetic | |
395 | supported by optabs.c. */ | |
396 | ||
397 | bool | |
ef4bddc2 | 398 | default_scalar_mode_supported_p (machine_mode mode) |
6dd53648 RH |
399 | { |
400 | int precision = GET_MODE_PRECISION (mode); | |
401 | ||
402 | switch (GET_MODE_CLASS (mode)) | |
403 | { | |
404 | case MODE_PARTIAL_INT: | |
405 | case MODE_INT: | |
406 | if (precision == CHAR_TYPE_SIZE) | |
407 | return true; | |
408 | if (precision == SHORT_TYPE_SIZE) | |
409 | return true; | |
410 | if (precision == INT_TYPE_SIZE) | |
411 | return true; | |
412 | if (precision == LONG_TYPE_SIZE) | |
413 | return true; | |
414 | if (precision == LONG_LONG_TYPE_SIZE) | |
415 | return true; | |
416 | if (precision == 2 * BITS_PER_WORD) | |
417 | return true; | |
418 | return false; | |
419 | ||
420 | case MODE_FLOAT: | |
421 | if (precision == FLOAT_TYPE_SIZE) | |
422 | return true; | |
423 | if (precision == DOUBLE_TYPE_SIZE) | |
424 | return true; | |
425 | if (precision == LONG_DOUBLE_TYPE_SIZE) | |
426 | return true; | |
427 | return false; | |
428 | ||
9a8ce21f | 429 | case MODE_DECIMAL_FLOAT: |
ab22c1fa CF |
430 | case MODE_FRACT: |
431 | case MODE_UFRACT: | |
432 | case MODE_ACCUM: | |
433 | case MODE_UACCUM: | |
9a8ce21f JG |
434 | return false; |
435 | ||
6dd53648 | 436 | default: |
1e128c5f | 437 | gcc_unreachable (); |
6dd53648 RH |
438 | } |
439 | } | |
6cdd5672 | 440 | |
8cc4b7a2 JM |
441 | /* Return true if libgcc supports floating-point mode MODE (known to |
442 | be supported as a scalar mode). */ | |
443 | ||
444 | bool | |
ef4bddc2 | 445 | default_libgcc_floating_mode_supported_p (machine_mode mode) |
8cc4b7a2 JM |
446 | { |
447 | switch (mode) | |
448 | { | |
449 | #ifdef HAVE_SFmode | |
450 | case SFmode: | |
451 | #endif | |
452 | #ifdef HAVE_DFmode | |
453 | case DFmode: | |
454 | #endif | |
455 | #ifdef HAVE_XFmode | |
456 | case XFmode: | |
457 | #endif | |
458 | #ifdef HAVE_TFmode | |
459 | case TFmode: | |
460 | #endif | |
461 | return true; | |
462 | ||
463 | default: | |
464 | return false; | |
465 | } | |
466 | } | |
467 | ||
c65699ef JM |
468 | /* Return the machine mode to use for the type _FloatN, if EXTENDED is |
469 | false, or _FloatNx, if EXTENDED is true, or VOIDmode if not | |
470 | supported. */ | |
471 | machine_mode | |
472 | default_floatn_mode (int n, bool extended) | |
473 | { | |
474 | if (extended) | |
475 | { | |
476 | machine_mode cand1 = VOIDmode, cand2 = VOIDmode; | |
477 | switch (n) | |
478 | { | |
479 | case 32: | |
480 | #ifdef HAVE_DFmode | |
481 | cand1 = DFmode; | |
482 | #endif | |
483 | break; | |
484 | ||
485 | case 64: | |
486 | #ifdef HAVE_XFmode | |
487 | cand1 = XFmode; | |
488 | #endif | |
489 | #ifdef HAVE_TFmode | |
490 | cand2 = TFmode; | |
491 | #endif | |
492 | break; | |
493 | ||
494 | case 128: | |
495 | break; | |
496 | ||
497 | default: | |
498 | /* Those are the only valid _FloatNx types. */ | |
499 | gcc_unreachable (); | |
500 | } | |
501 | if (cand1 != VOIDmode | |
502 | && REAL_MODE_FORMAT (cand1)->ieee_bits > n | |
503 | && targetm.scalar_mode_supported_p (cand1) | |
504 | && targetm.libgcc_floating_mode_supported_p (cand1)) | |
505 | return cand1; | |
506 | if (cand2 != VOIDmode | |
507 | && REAL_MODE_FORMAT (cand2)->ieee_bits > n | |
508 | && targetm.scalar_mode_supported_p (cand2) | |
509 | && targetm.libgcc_floating_mode_supported_p (cand2)) | |
510 | return cand2; | |
511 | } | |
512 | else | |
513 | { | |
514 | machine_mode cand = VOIDmode; | |
515 | switch (n) | |
516 | { | |
517 | case 16: | |
3479b7af JG |
518 | /* Always enable _Float16 if we have basic support for the mode. |
519 | Targets can control the range and precision of operations on | |
520 | the _Float16 type using TARGET_C_EXCESS_PRECISION. */ | |
521 | #ifdef HAVE_HFmode | |
522 | cand = HFmode; | |
523 | #endif | |
c65699ef JM |
524 | break; |
525 | ||
526 | case 32: | |
527 | #ifdef HAVE_SFmode | |
528 | cand = SFmode; | |
529 | #endif | |
530 | break; | |
531 | ||
532 | case 64: | |
533 | #ifdef HAVE_DFmode | |
534 | cand = DFmode; | |
535 | #endif | |
536 | break; | |
537 | ||
538 | case 128: | |
539 | #ifdef HAVE_TFmode | |
540 | cand = TFmode; | |
541 | #endif | |
542 | break; | |
543 | ||
544 | default: | |
545 | break; | |
546 | } | |
547 | if (cand != VOIDmode | |
548 | && REAL_MODE_FORMAT (cand)->ieee_bits == n | |
549 | && targetm.scalar_mode_supported_p (cand) | |
550 | && targetm.libgcc_floating_mode_supported_p (cand)) | |
551 | return cand; | |
552 | } | |
553 | return VOIDmode; | |
554 | } | |
555 | ||
2e681adf JR |
556 | /* Make some target macros useable by target-independent code. */ |
557 | bool | |
558 | targhook_words_big_endian (void) | |
559 | { | |
560 | return !!WORDS_BIG_ENDIAN; | |
561 | } | |
562 | ||
563 | bool | |
564 | targhook_float_words_big_endian (void) | |
565 | { | |
566 | return !!FLOAT_WORDS_BIG_ENDIAN; | |
567 | } | |
568 | ||
9193fb05 JM |
569 | /* True if the target supports floating-point exceptions and rounding |
570 | modes. */ | |
571 | ||
572 | bool | |
573 | default_float_exceptions_rounding_supported_p (void) | |
574 | { | |
575 | #ifdef HAVE_adddf3 | |
576 | return HAVE_adddf3; | |
577 | #else | |
578 | return false; | |
579 | #endif | |
580 | } | |
581 | ||
0884546e BE |
582 | /* True if the target supports decimal floating point. */ |
583 | ||
584 | bool | |
585 | default_decimal_float_supported_p (void) | |
586 | { | |
587 | return ENABLE_DECIMAL_FLOAT; | |
588 | } | |
589 | ||
ab22c1fa CF |
590 | /* True if the target supports fixed-point arithmetic. */ |
591 | ||
592 | bool | |
593 | default_fixed_point_supported_p (void) | |
594 | { | |
595 | return ENABLE_FIXED_POINT; | |
596 | } | |
597 | ||
2f251a05 AI |
598 | /* True if the target supports GNU indirect functions. */ |
599 | ||
600 | bool | |
601 | default_has_ifunc_p (void) | |
602 | { | |
603 | return HAVE_GNU_INDIRECT_FUNCTION; | |
604 | } | |
605 | ||
e7e64a25 AS |
606 | /* NULL if INSN insn is valid within a low-overhead loop, otherwise returns |
607 | an error message. | |
b8698a0f | 608 | |
0fa2e4df | 609 | This function checks whether a given INSN is valid within a low-overhead |
e7e64a25 AS |
610 | loop. If INSN is invalid it returns the reason for that, otherwise it |
611 | returns NULL. A called function may clobber any special registers required | |
612 | for low-overhead looping. Additionally, some targets (eg, PPC) use the count | |
a71a498d AS |
613 | register for branch on table instructions. We reject the doloop pattern in |
614 | these cases. */ | |
615 | ||
e7e64a25 | 616 | const char * |
ac44248e | 617 | default_invalid_within_doloop (const rtx_insn *insn) |
a71a498d AS |
618 | { |
619 | if (CALL_P (insn)) | |
e7e64a25 | 620 | return "Function call in loop."; |
b8698a0f | 621 | |
39718607 | 622 | if (tablejump_p (insn, NULL, NULL) || computed_jump_p (insn)) |
e7e64a25 | 623 | return "Computed branch in the loop."; |
b8698a0f | 624 | |
e7e64a25 | 625 | return NULL; |
a71a498d AS |
626 | } |
627 | ||
2505a3f2 RG |
628 | /* Mapping of builtin functions to vectorized variants. */ |
629 | ||
630 | tree | |
10766209 RS |
631 | default_builtin_vectorized_function (unsigned int, tree, tree) |
632 | { | |
633 | return NULL_TREE; | |
634 | } | |
635 | ||
636 | /* Mapping of target builtin functions to vectorized variants. */ | |
637 | ||
638 | tree | |
639 | default_builtin_md_vectorized_function (tree, tree, tree) | |
2505a3f2 RG |
640 | { |
641 | return NULL_TREE; | |
642 | } | |
643 | ||
f57d17f1 TM |
644 | /* Vectorized conversion. */ |
645 | ||
646 | tree | |
744aa42f | 647 | default_builtin_vectorized_conversion (unsigned int code ATTRIBUTE_UNUSED, |
88dd7150 RG |
648 | tree dest_type ATTRIBUTE_UNUSED, |
649 | tree src_type ATTRIBUTE_UNUSED) | |
f57d17f1 TM |
650 | { |
651 | return NULL_TREE; | |
652 | } | |
653 | ||
35e1a5e7 IR |
654 | /* Default vectorizer cost model values. */ |
655 | ||
656 | int | |
720f5239 | 657 | default_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost, |
a21892ad | 658 | tree vectype, |
720f5239 | 659 | int misalign ATTRIBUTE_UNUSED) |
35e1a5e7 IR |
660 | { |
661 | switch (type_of_cost) | |
662 | { | |
663 | case scalar_stmt: | |
664 | case scalar_load: | |
665 | case scalar_store: | |
666 | case vector_stmt: | |
667 | case vector_load: | |
668 | case vector_store: | |
669 | case vec_to_scalar: | |
670 | case scalar_to_vec: | |
671 | case cond_branch_not_taken: | |
672 | case vec_perm: | |
8bd37302 | 673 | case vec_promote_demote: |
35e1a5e7 IR |
674 | return 1; |
675 | ||
676 | case unaligned_load: | |
720f5239 | 677 | case unaligned_store: |
35e1a5e7 IR |
678 | return 2; |
679 | ||
680 | case cond_branch_taken: | |
681 | return 3; | |
682 | ||
a21892ad | 683 | case vec_construct: |
fcea0bbb | 684 | return TYPE_VECTOR_SUBPARTS (vectype) - 1; |
a21892ad | 685 | |
35e1a5e7 IR |
686 | default: |
687 | gcc_unreachable (); | |
688 | } | |
689 | } | |
690 | ||
cc2137be UB |
691 | /* Reciprocal. */ |
692 | ||
693 | tree | |
ee62a5a6 | 694 | default_builtin_reciprocal (tree) |
cc2137be UB |
695 | { |
696 | return NULL_TREE; | |
697 | } | |
698 | ||
6cdd5672 RH |
699 | bool |
700 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false ( | |
d5cc9181 | 701 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 702 | machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 703 | const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
6cdd5672 RH |
704 | { |
705 | return false; | |
706 | } | |
707 | ||
708 | bool | |
709 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true ( | |
d5cc9181 | 710 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 711 | machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 712 | const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
6cdd5672 RH |
713 | { |
714 | return true; | |
715 | } | |
78a52f11 RH |
716 | |
717 | int | |
718 | hook_int_CUMULATIVE_ARGS_mode_tree_bool_0 ( | |
d5cc9181 | 719 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 720 | machine_mode mode ATTRIBUTE_UNUSED, |
78a52f11 RH |
721 | tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
722 | { | |
723 | return 0; | |
724 | } | |
4d3e6fae | 725 | |
3c07301f | 726 | void |
d5cc9181 | 727 | default_function_arg_advance (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 728 | machine_mode mode ATTRIBUTE_UNUSED, |
3c07301f NF |
729 | const_tree type ATTRIBUTE_UNUSED, |
730 | bool named ATTRIBUTE_UNUSED) | |
731 | { | |
3c07301f | 732 | gcc_unreachable (); |
3c07301f NF |
733 | } |
734 | ||
735 | rtx | |
d5cc9181 | 736 | default_function_arg (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 737 | machine_mode mode ATTRIBUTE_UNUSED, |
3c07301f NF |
738 | const_tree type ATTRIBUTE_UNUSED, |
739 | bool named ATTRIBUTE_UNUSED) | |
740 | { | |
3c07301f | 741 | gcc_unreachable (); |
3c07301f NF |
742 | } |
743 | ||
744 | rtx | |
d5cc9181 | 745 | default_function_incoming_arg (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 746 | machine_mode mode ATTRIBUTE_UNUSED, |
3c07301f NF |
747 | const_tree type ATTRIBUTE_UNUSED, |
748 | bool named ATTRIBUTE_UNUSED) | |
749 | { | |
3c07301f | 750 | gcc_unreachable (); |
3c07301f NF |
751 | } |
752 | ||
c2ed6cf8 | 753 | unsigned int |
ef4bddc2 | 754 | default_function_arg_boundary (machine_mode mode ATTRIBUTE_UNUSED, |
c2ed6cf8 NF |
755 | const_tree type ATTRIBUTE_UNUSED) |
756 | { | |
757 | return PARM_BOUNDARY; | |
758 | } | |
759 | ||
123148b5 | 760 | unsigned int |
ef4bddc2 | 761 | default_function_arg_round_boundary (machine_mode mode ATTRIBUTE_UNUSED, |
123148b5 BS |
762 | const_tree type ATTRIBUTE_UNUSED) |
763 | { | |
764 | return PARM_BOUNDARY; | |
765 | } | |
766 | ||
b8698a0f | 767 | void |
912f2dac DB |
768 | hook_void_bitmap (bitmap regs ATTRIBUTE_UNUSED) |
769 | { | |
770 | } | |
771 | ||
4d3e6fae FJ |
772 | const char * |
773 | hook_invalid_arg_for_unprototyped_fn ( | |
3101faab KG |
774 | const_tree typelist ATTRIBUTE_UNUSED, |
775 | const_tree funcdecl ATTRIBUTE_UNUSED, | |
776 | const_tree val ATTRIBUTE_UNUSED) | |
4d3e6fae FJ |
777 | { |
778 | return NULL; | |
779 | } | |
7d69de61 RH |
780 | |
781 | /* Initialize the stack protection decls. */ | |
782 | ||
783 | /* Stack protection related decls living in libgcc. */ | |
784 | static GTY(()) tree stack_chk_guard_decl; | |
785 | ||
786 | tree | |
787 | default_stack_protect_guard (void) | |
788 | { | |
789 | tree t = stack_chk_guard_decl; | |
790 | ||
791 | if (t == NULL) | |
792 | { | |
623a6941 MK |
793 | rtx x; |
794 | ||
c2255bc4 AH |
795 | t = build_decl (UNKNOWN_LOCATION, |
796 | VAR_DECL, get_identifier ("__stack_chk_guard"), | |
7d69de61 RH |
797 | ptr_type_node); |
798 | TREE_STATIC (t) = 1; | |
799 | TREE_PUBLIC (t) = 1; | |
800 | DECL_EXTERNAL (t) = 1; | |
801 | TREE_USED (t) = 1; | |
802 | TREE_THIS_VOLATILE (t) = 1; | |
803 | DECL_ARTIFICIAL (t) = 1; | |
804 | DECL_IGNORED_P (t) = 1; | |
805 | ||
623a6941 MK |
806 | /* Do not share RTL as the declaration is visible outside of |
807 | current function. */ | |
808 | x = DECL_RTL (t); | |
809 | RTX_FLAG (x, used) = 1; | |
810 | ||
7d69de61 RH |
811 | stack_chk_guard_decl = t; |
812 | } | |
813 | ||
814 | return t; | |
815 | } | |
816 | ||
817 | static GTY(()) tree stack_chk_fail_decl; | |
818 | ||
b8698a0f | 819 | tree |
7d69de61 RH |
820 | default_external_stack_protect_fail (void) |
821 | { | |
822 | tree t = stack_chk_fail_decl; | |
823 | ||
824 | if (t == NULL_TREE) | |
825 | { | |
826 | t = build_function_type_list (void_type_node, NULL_TREE); | |
c2255bc4 AH |
827 | t = build_decl (UNKNOWN_LOCATION, |
828 | FUNCTION_DECL, get_identifier ("__stack_chk_fail"), t); | |
7d69de61 RH |
829 | TREE_STATIC (t) = 1; |
830 | TREE_PUBLIC (t) = 1; | |
831 | DECL_EXTERNAL (t) = 1; | |
832 | TREE_USED (t) = 1; | |
833 | TREE_THIS_VOLATILE (t) = 1; | |
834 | TREE_NOTHROW (t) = 1; | |
835 | DECL_ARTIFICIAL (t) = 1; | |
836 | DECL_IGNORED_P (t) = 1; | |
5b5cba1f JM |
837 | DECL_VISIBILITY (t) = VISIBILITY_DEFAULT; |
838 | DECL_VISIBILITY_SPECIFIED (t) = 1; | |
7d69de61 RH |
839 | |
840 | stack_chk_fail_decl = t; | |
841 | } | |
842 | ||
5039610b | 843 | return build_call_expr (t, 0); |
7d69de61 RH |
844 | } |
845 | ||
846 | tree | |
847 | default_hidden_stack_protect_fail (void) | |
848 | { | |
7ce918c5 JJ |
849 | #ifndef HAVE_GAS_HIDDEN |
850 | return default_external_stack_protect_fail (); | |
851 | #else | |
7d69de61 RH |
852 | tree t = stack_chk_fail_decl; |
853 | ||
7ce918c5 JJ |
854 | if (!flag_pic) |
855 | return default_external_stack_protect_fail (); | |
856 | ||
857 | if (t == NULL_TREE) | |
7d69de61 RH |
858 | { |
859 | t = build_function_type_list (void_type_node, NULL_TREE); | |
c2255bc4 | 860 | t = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL, |
7d69de61 RH |
861 | get_identifier ("__stack_chk_fail_local"), t); |
862 | TREE_STATIC (t) = 1; | |
863 | TREE_PUBLIC (t) = 1; | |
864 | DECL_EXTERNAL (t) = 1; | |
865 | TREE_USED (t) = 1; | |
866 | TREE_THIS_VOLATILE (t) = 1; | |
867 | TREE_NOTHROW (t) = 1; | |
868 | DECL_ARTIFICIAL (t) = 1; | |
869 | DECL_IGNORED_P (t) = 1; | |
870 | DECL_VISIBILITY_SPECIFIED (t) = 1; | |
871 | DECL_VISIBILITY (t) = VISIBILITY_HIDDEN; | |
872 | ||
873 | stack_chk_fail_decl = t; | |
874 | } | |
875 | ||
5039610b | 876 | return build_call_expr (t, 0); |
7ce918c5 | 877 | #endif |
7d69de61 RH |
878 | } |
879 | ||
8ddf681a | 880 | bool |
3101faab KG |
881 | hook_bool_const_rtx_commutative_p (const_rtx x, |
882 | int outer_code ATTRIBUTE_UNUSED) | |
8ddf681a R |
883 | { |
884 | return COMMUTATIVE_P (x); | |
885 | } | |
886 | ||
1d636cc6 | 887 | rtx |
586de218 KG |
888 | default_function_value (const_tree ret_type ATTRIBUTE_UNUSED, |
889 | const_tree fn_decl_or_type, | |
1d636cc6 RG |
890 | bool outgoing ATTRIBUTE_UNUSED) |
891 | { | |
892 | /* The old interface doesn't handle receiving the function type. */ | |
893 | if (fn_decl_or_type | |
894 | && !DECL_P (fn_decl_or_type)) | |
895 | fn_decl_or_type = NULL; | |
896 | ||
1d636cc6 RG |
897 | #ifdef FUNCTION_VALUE |
898 | return FUNCTION_VALUE (ret_type, fn_decl_or_type); | |
899 | #else | |
7fc6a96b | 900 | gcc_unreachable (); |
1d636cc6 RG |
901 | #endif |
902 | } | |
903 | ||
390b17c2 | 904 | rtx |
ef4bddc2 | 905 | default_libcall_value (machine_mode mode ATTRIBUTE_UNUSED, |
7fc6a96b | 906 | const_rtx fun ATTRIBUTE_UNUSED) |
390b17c2 | 907 | { |
7fc6a96b | 908 | #ifdef LIBCALL_VALUE |
390b17c2 | 909 | return LIBCALL_VALUE (mode); |
7fc6a96b AS |
910 | #else |
911 | gcc_unreachable (); | |
912 | #endif | |
390b17c2 RE |
913 | } |
914 | ||
82f81f18 AS |
915 | /* The default hook for TARGET_FUNCTION_VALUE_REGNO_P. */ |
916 | ||
917 | bool | |
918 | default_function_value_regno_p (const unsigned int regno ATTRIBUTE_UNUSED) | |
919 | { | |
920 | #ifdef FUNCTION_VALUE_REGNO_P | |
921 | return FUNCTION_VALUE_REGNO_P (regno); | |
922 | #else | |
923 | gcc_unreachable (); | |
924 | #endif | |
925 | } | |
926 | ||
150cdc9e RH |
927 | rtx |
928 | default_internal_arg_pointer (void) | |
929 | { | |
930 | /* If the reg that the virtual arg pointer will be translated into is | |
931 | not a fixed reg or is the stack pointer, make a copy of the virtual | |
932 | arg pointer, and address parms via the copy. The frame pointer is | |
933 | considered fixed even though it is not marked as such. */ | |
934 | if ((ARG_POINTER_REGNUM == STACK_POINTER_REGNUM | |
935 | || ! (fixed_regs[ARG_POINTER_REGNUM] | |
936 | || ARG_POINTER_REGNUM == FRAME_POINTER_REGNUM))) | |
937 | return copy_to_reg (virtual_incoming_args_rtx); | |
938 | else | |
939 | return virtual_incoming_args_rtx; | |
940 | } | |
941 | ||
531ca746 | 942 | rtx |
c21df29b | 943 | default_static_chain (const_tree ARG_UNUSED (fndecl_or_type), bool incoming_p) |
531ca746 | 944 | { |
531ca746 RH |
945 | if (incoming_p) |
946 | { | |
531ca746 RH |
947 | #ifdef STATIC_CHAIN_INCOMING_REGNUM |
948 | return gen_rtx_REG (Pmode, STATIC_CHAIN_INCOMING_REGNUM); | |
949 | #endif | |
950 | } | |
951 | ||
531ca746 RH |
952 | #ifdef STATIC_CHAIN_REGNUM |
953 | return gen_rtx_REG (Pmode, STATIC_CHAIN_REGNUM); | |
954 | #endif | |
955 | ||
2b4fa409 RH |
956 | { |
957 | static bool issued_error; | |
958 | if (!issued_error) | |
959 | { | |
960 | issued_error = true; | |
961 | sorry ("nested functions not supported on this target"); | |
962 | } | |
963 | ||
964 | /* It really doesn't matter what we return here, so long at it | |
965 | doesn't cause the rest of the compiler to crash. */ | |
966 | return gen_rtx_MEM (Pmode, stack_pointer_rtx); | |
967 | } | |
531ca746 RH |
968 | } |
969 | ||
531ca746 RH |
970 | void |
971 | default_trampoline_init (rtx ARG_UNUSED (m_tramp), tree ARG_UNUSED (t_func), | |
972 | rtx ARG_UNUSED (r_chain)) | |
973 | { | |
531ca746 | 974 | sorry ("nested function trampolines not supported on this target"); |
531ca746 RH |
975 | } |
976 | ||
079e7538 NF |
977 | int |
978 | default_return_pops_args (tree fundecl ATTRIBUTE_UNUSED, | |
979 | tree funtype ATTRIBUTE_UNUSED, | |
980 | int size ATTRIBUTE_UNUSED) | |
981 | { | |
982 | return 0; | |
983 | } | |
984 | ||
a87cf97e | 985 | reg_class_t |
81f40b79 ILT |
986 | default_branch_target_register_class (void) |
987 | { | |
988 | return NO_REGS; | |
989 | } | |
990 | ||
5074a1f8 VM |
991 | reg_class_t |
992 | default_ira_change_pseudo_allocno_class (int regno ATTRIBUTE_UNUSED, | |
31e2b5a3 WD |
993 | reg_class_t cl, |
994 | reg_class_t best_cl ATTRIBUTE_UNUSED) | |
5074a1f8 VM |
995 | { |
996 | return cl; | |
997 | } | |
998 | ||
55a2c322 VM |
999 | extern bool |
1000 | default_lra_p (void) | |
1001 | { | |
794b71a4 | 1002 | return true; |
55a2c322 VM |
1003 | } |
1004 | ||
1005 | int | |
1006 | default_register_priority (int hard_regno ATTRIBUTE_UNUSED) | |
1007 | { | |
1008 | return 0; | |
1009 | } | |
1010 | ||
3b9ceb4b VM |
1011 | extern bool |
1012 | default_register_usage_leveling_p (void) | |
1013 | { | |
1014 | return false; | |
1015 | } | |
1016 | ||
55a2c322 VM |
1017 | extern bool |
1018 | default_different_addr_displacement_p (void) | |
1019 | { | |
1020 | return false; | |
1021 | } | |
1022 | ||
a87cf97e | 1023 | reg_class_t |
8a99f6f9 | 1024 | default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, |
a87cf97e | 1025 | reg_class_t reload_class_i ATTRIBUTE_UNUSED, |
ef4bddc2 | 1026 | machine_mode reload_mode ATTRIBUTE_UNUSED, |
8a99f6f9 R |
1027 | secondary_reload_info *sri) |
1028 | { | |
48c54229 | 1029 | enum reg_class rclass = NO_REGS; |
a87cf97e | 1030 | enum reg_class reload_class = (enum reg_class) reload_class_i; |
8a99f6f9 R |
1031 | |
1032 | if (sri->prev_sri && sri->prev_sri->t_icode != CODE_FOR_nothing) | |
1033 | { | |
1034 | sri->icode = sri->prev_sri->t_icode; | |
1035 | return NO_REGS; | |
1036 | } | |
1037 | #ifdef SECONDARY_INPUT_RELOAD_CLASS | |
1038 | if (in_p) | |
48c54229 | 1039 | rclass = SECONDARY_INPUT_RELOAD_CLASS (reload_class, reload_mode, x); |
8a99f6f9 R |
1040 | #endif |
1041 | #ifdef SECONDARY_OUTPUT_RELOAD_CLASS | |
1042 | if (! in_p) | |
48c54229 | 1043 | rclass = SECONDARY_OUTPUT_RELOAD_CLASS (reload_class, reload_mode, x); |
8a99f6f9 | 1044 | #endif |
48c54229 | 1045 | if (rclass != NO_REGS) |
8a99f6f9 | 1046 | { |
f9621cc4 RS |
1047 | enum insn_code icode |
1048 | = direct_optab_handler (in_p ? reload_in_optab : reload_out_optab, | |
1049 | reload_mode); | |
8a99f6f9 R |
1050 | |
1051 | if (icode != CODE_FOR_nothing | |
2ef6ce06 | 1052 | && !insn_operand_matches (icode, in_p, x)) |
8a99f6f9 R |
1053 | icode = CODE_FOR_nothing; |
1054 | else if (icode != CODE_FOR_nothing) | |
1055 | { | |
1056 | const char *insn_constraint, *scratch_constraint; | |
8a99f6f9 R |
1057 | enum reg_class insn_class, scratch_class; |
1058 | ||
1059 | gcc_assert (insn_data[(int) icode].n_operands == 3); | |
1060 | insn_constraint = insn_data[(int) icode].operand[!in_p].constraint; | |
1061 | if (!*insn_constraint) | |
1062 | insn_class = ALL_REGS; | |
1063 | else | |
1064 | { | |
1065 | if (in_p) | |
1066 | { | |
1067 | gcc_assert (*insn_constraint == '='); | |
1068 | insn_constraint++; | |
1069 | } | |
8677664e RS |
1070 | insn_class = (reg_class_for_constraint |
1071 | (lookup_constraint (insn_constraint))); | |
8a99f6f9 R |
1072 | gcc_assert (insn_class != NO_REGS); |
1073 | } | |
1074 | ||
1075 | scratch_constraint = insn_data[(int) icode].operand[2].constraint; | |
11e30dd8 HPN |
1076 | /* The scratch register's constraint must start with "=&", |
1077 | except for an input reload, where only "=" is necessary, | |
1078 | and where it might be beneficial to re-use registers from | |
1079 | the input. */ | |
8a99f6f9 | 1080 | gcc_assert (scratch_constraint[0] == '=' |
11e30dd8 HPN |
1081 | && (in_p || scratch_constraint[1] == '&')); |
1082 | scratch_constraint++; | |
1083 | if (*scratch_constraint == '&') | |
1084 | scratch_constraint++; | |
8677664e RS |
1085 | scratch_class = (reg_class_for_constraint |
1086 | (lookup_constraint (scratch_constraint))); | |
8a99f6f9 R |
1087 | |
1088 | if (reg_class_subset_p (reload_class, insn_class)) | |
1089 | { | |
48c54229 KG |
1090 | gcc_assert (scratch_class == rclass); |
1091 | rclass = NO_REGS; | |
8a99f6f9 R |
1092 | } |
1093 | else | |
48c54229 | 1094 | rclass = insn_class; |
8a99f6f9 R |
1095 | |
1096 | } | |
48c54229 | 1097 | if (rclass == NO_REGS) |
8a99f6f9 R |
1098 | sri->icode = icode; |
1099 | else | |
1100 | sri->t_icode = icode; | |
1101 | } | |
48c54229 | 1102 | return rclass; |
8a99f6f9 R |
1103 | } |
1104 | ||
9b580a0b RH |
1105 | /* By default, if flag_pic is true, then neither local nor global relocs |
1106 | should be placed in readonly memory. */ | |
1107 | ||
1108 | int | |
1109 | default_reloc_rw_mask (void) | |
1110 | { | |
1111 | return flag_pic ? 3 : 0; | |
1112 | } | |
1113 | ||
5234b8f5 DS |
1114 | /* By default, do no modification. */ |
1115 | tree default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED, | |
1116 | tree id) | |
1117 | { | |
1118 | return id; | |
1119 | } | |
1120 | ||
5aea1e76 UW |
1121 | /* Default to natural alignment for vector types. */ |
1122 | HOST_WIDE_INT | |
1123 | default_vector_alignment (const_tree type) | |
1124 | { | |
b6b552fd BS |
1125 | HOST_WIDE_INT align = tree_to_shwi (TYPE_SIZE (type)); |
1126 | if (align > MAX_OFILE_ALIGNMENT) | |
1127 | align = MAX_OFILE_ALIGNMENT; | |
1128 | return align; | |
5aea1e76 UW |
1129 | } |
1130 | ||
c2873892 RB |
1131 | /* By default assume vectors of element TYPE require a multiple of the natural |
1132 | alignment of TYPE. TYPE is naturally aligned if IS_PACKED is false. */ | |
5b900a4c | 1133 | bool |
a4cf4b64 | 1134 | default_builtin_vector_alignment_reachable (const_tree /*type*/, bool is_packed) |
5b900a4c | 1135 | { |
a4cf4b64 | 1136 | return ! is_packed; |
5b900a4c DN |
1137 | } |
1138 | ||
0601d0cf | 1139 | /* By default, assume that a target supports any factor of misalignment |
b8698a0f | 1140 | memory access if it supports movmisalign patten. |
0601d0cf RE |
1141 | is_packed is true if the memory access is defined in a packed struct. */ |
1142 | bool | |
ef4bddc2 | 1143 | default_builtin_support_vector_misalignment (machine_mode mode, |
0601d0cf RE |
1144 | const_tree type |
1145 | ATTRIBUTE_UNUSED, | |
1146 | int misalignment | |
1147 | ATTRIBUTE_UNUSED, | |
1148 | bool is_packed | |
1149 | ATTRIBUTE_UNUSED) | |
1150 | { | |
947131ba | 1151 | if (optab_handler (movmisalign_optab, mode) != CODE_FOR_nothing) |
0601d0cf RE |
1152 | return true; |
1153 | return false; | |
1154 | } | |
1155 | ||
26983c22 L |
1156 | /* By default, only attempt to parallelize bitwise operations, and |
1157 | possibly adds/subtracts using bit-twiddling. */ | |
1158 | ||
ef4bddc2 RS |
1159 | machine_mode |
1160 | default_preferred_simd_mode (machine_mode mode ATTRIBUTE_UNUSED) | |
26983c22 | 1161 | { |
cc4b5170 | 1162 | return word_mode; |
26983c22 L |
1163 | } |
1164 | ||
767f865f RG |
1165 | /* By default only the size derived from the preferred vector mode |
1166 | is tried. */ | |
1167 | ||
1168 | unsigned int | |
1169 | default_autovectorize_vector_sizes (void) | |
1170 | { | |
1171 | return 0; | |
1172 | } | |
1173 | ||
9f47c7e5 IE |
1174 | /* By defaults a vector of integers is used as a mask. */ |
1175 | ||
1176 | machine_mode | |
1177 | default_get_mask_mode (unsigned nunits, unsigned vector_size) | |
1178 | { | |
1179 | unsigned elem_size = vector_size / nunits; | |
1180 | machine_mode elem_mode | |
1181 | = smallest_mode_for_size (elem_size * BITS_PER_UNIT, MODE_INT); | |
e219e495 | 1182 | machine_mode vector_mode; |
9f47c7e5 IE |
1183 | |
1184 | gcc_assert (elem_size * nunits == vector_size); | |
1185 | ||
e219e495 | 1186 | vector_mode = mode_for_vector (elem_mode, nunits); |
df94599f IE |
1187 | if (!VECTOR_MODE_P (vector_mode) |
1188 | || !targetm.vector_mode_supported_p (vector_mode)) | |
e219e495 IE |
1189 | vector_mode = BLKmode; |
1190 | ||
1191 | return vector_mode; | |
9f47c7e5 IE |
1192 | } |
1193 | ||
92345349 BS |
1194 | /* By default, the cost model accumulates three separate costs (prologue, |
1195 | loop body, and epilogue) for a vectorized loop or block. So allocate an | |
1196 | array of three unsigned ints, set it to zero, and return its address. */ | |
c3e7ee41 BS |
1197 | |
1198 | void * | |
1199 | default_init_cost (struct loop *loop_info ATTRIBUTE_UNUSED) | |
1200 | { | |
92345349 BS |
1201 | unsigned *cost = XNEWVEC (unsigned, 3); |
1202 | cost[vect_prologue] = cost[vect_body] = cost[vect_epilogue] = 0; | |
c3e7ee41 BS |
1203 | return cost; |
1204 | } | |
1205 | ||
1206 | /* By default, the cost model looks up the cost of the given statement | |
1207 | kind and mode, multiplies it by the occurrence count, accumulates | |
92345349 | 1208 | it into the cost specified by WHERE, and returns the cost added. */ |
c3e7ee41 BS |
1209 | |
1210 | unsigned | |
1211 | default_add_stmt_cost (void *data, int count, enum vect_cost_for_stmt kind, | |
92345349 BS |
1212 | struct _stmt_vec_info *stmt_info, int misalign, |
1213 | enum vect_cost_model_location where) | |
c3e7ee41 BS |
1214 | { |
1215 | unsigned *cost = (unsigned *) data; | |
1216 | unsigned retval = 0; | |
1217 | ||
d6d11272 | 1218 | tree vectype = stmt_info ? stmt_vectype (stmt_info) : NULL_TREE; |
58e5400a BM |
1219 | int stmt_cost = targetm.vectorize.builtin_vectorization_cost (kind, vectype, |
1220 | misalign); | |
d6d11272 XDL |
1221 | /* Statements in an inner loop relative to the loop being |
1222 | vectorized are weighted more heavily. The value here is | |
1223 | arbitrary and could potentially be improved with analysis. */ | |
1224 | if (where == vect_body && stmt_info && stmt_in_inner_loop_p (stmt_info)) | |
1225 | count *= 50; /* FIXME. */ | |
1226 | ||
1227 | retval = (unsigned) (count * stmt_cost); | |
1228 | cost[where] += retval; | |
c3e7ee41 BS |
1229 | |
1230 | return retval; | |
1231 | } | |
1232 | ||
92345349 | 1233 | /* By default, the cost model just returns the accumulated costs. */ |
c3e7ee41 | 1234 | |
92345349 BS |
1235 | void |
1236 | default_finish_cost (void *data, unsigned *prologue_cost, | |
1237 | unsigned *body_cost, unsigned *epilogue_cost) | |
c3e7ee41 | 1238 | { |
92345349 BS |
1239 | unsigned *cost = (unsigned *) data; |
1240 | *prologue_cost = cost[vect_prologue]; | |
1241 | *body_cost = cost[vect_body]; | |
1242 | *epilogue_cost = cost[vect_epilogue]; | |
c3e7ee41 BS |
1243 | } |
1244 | ||
1245 | /* Free the cost data. */ | |
1246 | ||
1247 | void | |
1248 | default_destroy_cost_data (void *data) | |
1249 | { | |
1250 | free (data); | |
1251 | } | |
1252 | ||
d4ebfa65 BE |
1253 | /* Determine whether or not a pointer mode is valid. Assume defaults |
1254 | of ptr_mode or Pmode - can be overridden. */ | |
1255 | bool | |
ef4bddc2 | 1256 | default_valid_pointer_mode (machine_mode mode) |
d4ebfa65 BE |
1257 | { |
1258 | return (mode == ptr_mode || mode == Pmode); | |
1259 | } | |
1260 | ||
7352c013 RG |
1261 | /* Determine whether the memory reference specified by REF may alias |
1262 | the C libraries errno location. */ | |
1263 | bool | |
1264 | default_ref_may_alias_errno (ao_ref *ref) | |
1265 | { | |
1266 | tree base = ao_ref_base (ref); | |
1267 | /* The default implementation assumes the errno location is | |
1268 | a declaration of type int or is always accessed via a | |
1269 | pointer to int. We assume that accesses to errno are | |
1270 | not deliberately obfuscated (even in conforming ways). */ | |
1271 | if (TYPE_UNSIGNED (TREE_TYPE (base)) | |
1272 | || TYPE_MODE (TREE_TYPE (base)) != TYPE_MODE (integer_type_node)) | |
1273 | return false; | |
1274 | /* The default implementation assumes an errno location | |
1275 | declaration is never defined in the current compilation unit. */ | |
1276 | if (DECL_P (base) | |
1277 | && !TREE_STATIC (base)) | |
1278 | return true; | |
1279 | else if (TREE_CODE (base) == MEM_REF | |
1280 | && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME) | |
1281 | { | |
1282 | struct ptr_info_def *pi = SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)); | |
1283 | return !pi || pi->pt.anything || pi->pt.nonlocal; | |
1284 | } | |
1285 | return false; | |
1286 | } | |
1287 | ||
0f16c572 RH |
1288 | /* Return the mode for a pointer to a given ADDRSPACE, |
1289 | defaulting to ptr_mode for all address spaces. */ | |
d4ebfa65 | 1290 | |
ef4bddc2 | 1291 | machine_mode |
d4ebfa65 BE |
1292 | default_addr_space_pointer_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) |
1293 | { | |
d4ebfa65 BE |
1294 | return ptr_mode; |
1295 | } | |
1296 | ||
0f16c572 RH |
1297 | /* Return the mode for an address in a given ADDRSPACE, |
1298 | defaulting to Pmode for all address spaces. */ | |
d4ebfa65 | 1299 | |
ef4bddc2 | 1300 | machine_mode |
d4ebfa65 BE |
1301 | default_addr_space_address_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) |
1302 | { | |
d4ebfa65 BE |
1303 | return Pmode; |
1304 | } | |
1305 | ||
0f16c572 RH |
1306 | /* Named address space version of valid_pointer_mode. |
1307 | To match the above, the same modes apply to all address spaces. */ | |
d4ebfa65 BE |
1308 | |
1309 | bool | |
0f16c572 RH |
1310 | default_addr_space_valid_pointer_mode (machine_mode mode, |
1311 | addr_space_t as ATTRIBUTE_UNUSED) | |
d4ebfa65 | 1312 | { |
d4ebfa65 BE |
1313 | return targetm.valid_pointer_mode (mode); |
1314 | } | |
1315 | ||
1316 | /* Some places still assume that all pointer or address modes are the | |
1317 | standard Pmode and ptr_mode. These optimizations become invalid if | |
1318 | the target actually supports multiple different modes. For now, | |
1319 | we disable such optimizations on such targets, using this function. */ | |
1320 | ||
1321 | bool | |
1322 | target_default_pointer_address_modes_p (void) | |
1323 | { | |
1324 | if (targetm.addr_space.address_mode != default_addr_space_address_mode) | |
1325 | return false; | |
1326 | if (targetm.addr_space.pointer_mode != default_addr_space_pointer_mode) | |
1327 | return false; | |
1328 | ||
1329 | return true; | |
1330 | } | |
1331 | ||
0f16c572 RH |
1332 | /* Named address space version of legitimate_address_p. |
1333 | By default, all address spaces have the same form. */ | |
09e881c9 BE |
1334 | |
1335 | bool | |
ef4bddc2 | 1336 | default_addr_space_legitimate_address_p (machine_mode mode, rtx mem, |
0f16c572 RH |
1337 | bool strict, |
1338 | addr_space_t as ATTRIBUTE_UNUSED) | |
09e881c9 | 1339 | { |
09e881c9 BE |
1340 | return targetm.legitimate_address_p (mode, mem, strict); |
1341 | } | |
1342 | ||
0f16c572 RH |
1343 | /* Named address space version of LEGITIMIZE_ADDRESS. |
1344 | By default, all address spaces have the same form. */ | |
09e881c9 BE |
1345 | |
1346 | rtx | |
0f16c572 RH |
1347 | default_addr_space_legitimize_address (rtx x, rtx oldx, machine_mode mode, |
1348 | addr_space_t as ATTRIBUTE_UNUSED) | |
09e881c9 | 1349 | { |
09e881c9 BE |
1350 | return targetm.legitimize_address (x, oldx, mode); |
1351 | } | |
1352 | ||
1353 | /* The default hook for determining if one named address space is a subset of | |
1354 | another and to return which address space to use as the common address | |
1355 | space. */ | |
1356 | ||
1357 | bool | |
1358 | default_addr_space_subset_p (addr_space_t subset, addr_space_t superset) | |
1359 | { | |
1360 | return (subset == superset); | |
1361 | } | |
1362 | ||
6626f970 RH |
1363 | /* The default hook for determining if 0 within a named address |
1364 | space is a valid address. */ | |
1365 | ||
1366 | bool | |
1367 | default_addr_space_zero_address_valid (addr_space_t as ATTRIBUTE_UNUSED) | |
1368 | { | |
1369 | return false; | |
1370 | } | |
1371 | ||
f736b911 RH |
1372 | /* The default hook for debugging the address space is to return the |
1373 | address space number to indicate DW_AT_address_class. */ | |
1374 | int | |
1375 | default_addr_space_debug (addr_space_t as) | |
1376 | { | |
1377 | return as; | |
1378 | } | |
1379 | ||
ffc22840 GJL |
1380 | /* The default hook implementation for TARGET_ADDR_SPACE_DIAGNOSE_USAGE. |
1381 | Don't complain about any address space. */ | |
1382 | ||
1383 | void | |
1384 | default_addr_space_diagnose_usage (addr_space_t, location_t) | |
1385 | { | |
1386 | } | |
1387 | ||
1388 | ||
09e881c9 BE |
1389 | /* The default hook for TARGET_ADDR_SPACE_CONVERT. This hook should never be |
1390 | called for targets with only a generic address space. */ | |
1391 | ||
1392 | rtx | |
1393 | default_addr_space_convert (rtx op ATTRIBUTE_UNUSED, | |
1394 | tree from_type ATTRIBUTE_UNUSED, | |
1395 | tree to_type ATTRIBUTE_UNUSED) | |
1396 | { | |
1397 | gcc_unreachable (); | |
1398 | } | |
1399 | ||
dbc42c44 AS |
1400 | bool |
1401 | default_hard_regno_scratch_ok (unsigned int regno ATTRIBUTE_UNUSED) | |
1402 | { | |
1403 | return true; | |
1404 | } | |
1405 | ||
cbda7dc6 AS |
1406 | /* The default implementation of TARGET_MODE_DEPENDENT_ADDRESS_P. */ |
1407 | ||
1408 | bool | |
5bfed9a9 GJL |
1409 | default_mode_dependent_address_p (const_rtx addr ATTRIBUTE_UNUSED, |
1410 | addr_space_t addrspace ATTRIBUTE_UNUSED) | |
cbda7dc6 | 1411 | { |
cbda7dc6 | 1412 | return false; |
cbda7dc6 AS |
1413 | } |
1414 | ||
ab442df7 MM |
1415 | bool |
1416 | default_target_option_valid_attribute_p (tree ARG_UNUSED (fndecl), | |
1417 | tree ARG_UNUSED (name), | |
1418 | tree ARG_UNUSED (args), | |
1419 | int ARG_UNUSED (flags)) | |
1420 | { | |
5779e713 MM |
1421 | warning (OPT_Wattributes, |
1422 | "target attribute is not supported on this machine"); | |
1423 | ||
1424 | return false; | |
1425 | } | |
1426 | ||
1427 | bool | |
1428 | default_target_option_pragma_parse (tree ARG_UNUSED (args), | |
1429 | tree ARG_UNUSED (pop_target)) | |
1430 | { | |
1aa5ba4e DV |
1431 | /* If args is NULL the caller is handle_pragma_pop_options (). In that case, |
1432 | emit no warning because "#pragma GCC pop_target" is valid on targets that | |
1433 | do not have the "target" pragma. */ | |
1434 | if (args) | |
1435 | warning (OPT_Wpragmas, | |
1436 | "#pragma GCC target is not supported for this machine"); | |
5779e713 | 1437 | |
ab442df7 MM |
1438 | return false; |
1439 | } | |
1440 | ||
1441 | bool | |
5cec9f59 | 1442 | default_target_can_inline_p (tree caller, tree callee) |
ab442df7 MM |
1443 | { |
1444 | bool ret = false; | |
1445 | tree callee_opts = DECL_FUNCTION_SPECIFIC_TARGET (callee); | |
1446 | tree caller_opts = DECL_FUNCTION_SPECIFIC_TARGET (caller); | |
1447 | ||
1448 | /* If callee has no option attributes, then it is ok to inline */ | |
1449 | if (!callee_opts) | |
1450 | ret = true; | |
1451 | ||
1452 | /* If caller has no option attributes, but callee does then it is not ok to | |
1453 | inline */ | |
1454 | else if (!caller_opts) | |
1455 | ret = false; | |
1456 | ||
dd5a833e MS |
1457 | /* If both caller and callee have attributes, assume that if the |
1458 | pointer is different, the two functions have different target | |
1459 | options since build_target_option_node uses a hash table for the | |
1460 | options. */ | |
ab442df7 MM |
1461 | else |
1462 | ret = (callee_opts == caller_opts); | |
1463 | ||
1464 | return ret; | |
1465 | } | |
1466 | ||
e6ff3083 AS |
1467 | /* If the machine does not have a case insn that compares the bounds, |
1468 | this means extra overhead for dispatch tables, which raises the | |
1469 | threshold for using them. */ | |
1470 | ||
0cd2402d SB |
1471 | unsigned int |
1472 | default_case_values_threshold (void) | |
e6ff3083 | 1473 | { |
8684d89d | 1474 | return (targetm.have_casesi () ? 4 : 5); |
e6ff3083 AS |
1475 | } |
1476 | ||
2929029c WG |
1477 | bool |
1478 | default_have_conditional_execution (void) | |
1479 | { | |
2929029c | 1480 | return HAVE_conditional_execution; |
2929029c WG |
1481 | } |
1482 | ||
9b2b7279 AM |
1483 | /* By default we assume that c99 functions are present at the runtime, |
1484 | but sincos is not. */ | |
1485 | bool | |
1486 | default_libc_has_function (enum function_class fn_class) | |
1487 | { | |
1488 | if (fn_class == function_c94 | |
1489 | || fn_class == function_c99_misc | |
1490 | || fn_class == function_c99_math_complex) | |
1491 | return true; | |
1492 | ||
1493 | return false; | |
1494 | } | |
1495 | ||
1496 | bool | |
1497 | gnu_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED) | |
1498 | { | |
1499 | return true; | |
1500 | } | |
1501 | ||
1502 | bool | |
1503 | no_c99_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED) | |
1504 | { | |
1505 | return false; | |
1506 | } | |
1507 | ||
0a35513e AH |
1508 | tree |
1509 | default_builtin_tm_load_store (tree ARG_UNUSED (type)) | |
1510 | { | |
1511 | return NULL_TREE; | |
1512 | } | |
1513 | ||
f5c21ef3 AS |
1514 | /* Compute cost of moving registers to/from memory. */ |
1515 | ||
1516 | int | |
ef4bddc2 | 1517 | default_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
a87cf97e | 1518 | reg_class_t rclass ATTRIBUTE_UNUSED, |
f5c21ef3 AS |
1519 | bool in ATTRIBUTE_UNUSED) |
1520 | { | |
1521 | #ifndef MEMORY_MOVE_COST | |
a87cf97e | 1522 | return (4 + memory_move_secondary_cost (mode, (enum reg_class) rclass, in)); |
f5c21ef3 | 1523 | #else |
a87cf97e | 1524 | return MEMORY_MOVE_COST (mode, (enum reg_class) rclass, in); |
f5c21ef3 AS |
1525 | #endif |
1526 | } | |
1527 | ||
de8f4b07 AS |
1528 | /* Compute cost of moving data from a register of class FROM to one of |
1529 | TO, using MODE. */ | |
1530 | ||
1531 | int | |
ef4bddc2 | 1532 | default_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
a87cf97e JR |
1533 | reg_class_t from ATTRIBUTE_UNUSED, |
1534 | reg_class_t to ATTRIBUTE_UNUSED) | |
de8f4b07 AS |
1535 | { |
1536 | #ifndef REGISTER_MOVE_COST | |
1537 | return 2; | |
1538 | #else | |
a87cf97e | 1539 | return REGISTER_MOVE_COST (mode, (enum reg_class) from, (enum reg_class) to); |
de8f4b07 AS |
1540 | #endif |
1541 | } | |
1542 | ||
7cbed008 | 1543 | /* For hooks which use the MOVE_RATIO macro, this gives the legacy default |
9c582551 | 1544 | behavior. SPEED_P is true if we are compiling for speed. */ |
7cbed008 | 1545 | |
5a6bc9c7 | 1546 | unsigned int |
7cbed008 JG |
1547 | get_move_ratio (bool speed_p ATTRIBUTE_UNUSED) |
1548 | { | |
1549 | unsigned int move_ratio; | |
1550 | #ifdef MOVE_RATIO | |
1551 | move_ratio = (unsigned int) MOVE_RATIO (speed_p); | |
1552 | #else | |
1553 | #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti) | |
1554 | move_ratio = 2; | |
1555 | #else /* No movmem patterns, pick a default. */ | |
1556 | move_ratio = ((speed_p) ? 15 : 3); | |
1557 | #endif | |
1558 | #endif | |
1559 | return move_ratio; | |
1560 | } | |
1561 | ||
1562 | /* Return TRUE if the move_by_pieces/set_by_pieces infrastructure should be | |
1563 | used; return FALSE if the movmem/setmem optab should be expanded, or | |
1564 | a call to memcpy emitted. */ | |
1565 | ||
1566 | bool | |
445d7826 | 1567 | default_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size, |
7cbed008 JG |
1568 | unsigned int alignment, |
1569 | enum by_pieces_operation op, | |
1570 | bool speed_p) | |
1571 | { | |
1572 | unsigned int max_size = 0; | |
1573 | unsigned int ratio = 0; | |
1574 | ||
1575 | switch (op) | |
1576 | { | |
36b85e43 BS |
1577 | case CLEAR_BY_PIECES: |
1578 | max_size = STORE_MAX_PIECES; | |
1579 | ratio = CLEAR_RATIO (speed_p); | |
1580 | break; | |
1581 | case MOVE_BY_PIECES: | |
1582 | max_size = MOVE_MAX_PIECES; | |
1583 | ratio = get_move_ratio (speed_p); | |
1584 | break; | |
1585 | case SET_BY_PIECES: | |
1586 | max_size = STORE_MAX_PIECES; | |
1587 | ratio = SET_RATIO (speed_p); | |
1588 | break; | |
1589 | case STORE_BY_PIECES: | |
1590 | max_size = STORE_MAX_PIECES; | |
1591 | ratio = get_move_ratio (speed_p); | |
1592 | break; | |
1593 | case COMPARE_BY_PIECES: | |
1594 | max_size = COMPARE_MAX_PIECES; | |
1595 | /* Pick a likely default, just as in get_move_ratio. */ | |
1596 | ratio = speed_p ? 15 : 3; | |
1597 | break; | |
7cbed008 JG |
1598 | } |
1599 | ||
36b85e43 BS |
1600 | return by_pieces_ninsns (size, alignment, max_size + 1, op) < ratio; |
1601 | } | |
1602 | ||
1603 | /* This hook controls code generation for expanding a memcmp operation by | |
1604 | pieces. Return 1 for the normal pattern of compare/jump after each pair | |
1605 | of loads, or a higher number to reduce the number of branches. */ | |
1606 | ||
1607 | int | |
1608 | default_compare_by_pieces_branch_ratio (machine_mode) | |
1609 | { | |
1610 | return 1; | |
7cbed008 JG |
1611 | } |
1612 | ||
3c5273a9 KT |
1613 | bool |
1614 | default_profile_before_prologue (void) | |
1615 | { | |
1616 | #ifdef PROFILE_BEFORE_PROLOGUE | |
1617 | return true; | |
1618 | #else | |
1619 | return false; | |
1620 | #endif | |
1621 | } | |
1622 | ||
fba42e24 AS |
1623 | /* The default implementation of TARGET_PREFERRED_RELOAD_CLASS. */ |
1624 | ||
1625 | reg_class_t | |
1626 | default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, | |
1627 | reg_class_t rclass) | |
1628 | { | |
1629 | #ifdef PREFERRED_RELOAD_CLASS | |
1630 | return (reg_class_t) PREFERRED_RELOAD_CLASS (x, (enum reg_class) rclass); | |
1631 | #else | |
1632 | return rclass; | |
1633 | #endif | |
1634 | } | |
1635 | ||
abd26bfb AS |
1636 | /* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS. */ |
1637 | ||
1638 | reg_class_t | |
1639 | default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
1640 | reg_class_t rclass) | |
1641 | { | |
abd26bfb | 1642 | return rclass; |
abd26bfb AS |
1643 | } |
1644 | ||
5f286f4a YQ |
1645 | /* The default implementation of TARGET_PREFERRED_RENAME_CLASS. */ |
1646 | reg_class_t | |
1647 | default_preferred_rename_class (reg_class_t rclass ATTRIBUTE_UNUSED) | |
1648 | { | |
1649 | return NO_REGS; | |
1650 | } | |
1651 | ||
07b8f0a8 AS |
1652 | /* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P. */ |
1653 | ||
1654 | bool | |
1655 | default_class_likely_spilled_p (reg_class_t rclass) | |
1656 | { | |
07b8f0a8 | 1657 | return (reg_class_size[(int) rclass] == 1); |
07b8f0a8 AS |
1658 | } |
1659 | ||
a8c44c52 AS |
1660 | /* The default implementation of TARGET_CLASS_MAX_NREGS. */ |
1661 | ||
1662 | unsigned char | |
1663 | default_class_max_nregs (reg_class_t rclass ATTRIBUTE_UNUSED, | |
ef4bddc2 | 1664 | machine_mode mode ATTRIBUTE_UNUSED) |
a8c44c52 AS |
1665 | { |
1666 | #ifdef CLASS_MAX_NREGS | |
1667 | return (unsigned char) CLASS_MAX_NREGS ((enum reg_class) rclass, mode); | |
1668 | #else | |
1669 | return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD); | |
1670 | #endif | |
1671 | } | |
1672 | ||
f0a0390e RH |
1673 | /* Determine the debugging unwind mechanism for the target. */ |
1674 | ||
1675 | enum unwind_info_type | |
1676 | default_debug_unwind_info (void) | |
1677 | { | |
1678 | /* If the target wants to force the use of dwarf2 unwind info, let it. */ | |
1679 | /* ??? Change all users to the hook, then poison this. */ | |
1680 | #ifdef DWARF2_FRAME_INFO | |
1681 | if (DWARF2_FRAME_INFO) | |
1682 | return UI_DWARF2; | |
1683 | #endif | |
1684 | ||
1685 | /* Otherwise, only turn it on if dwarf2 debugging is enabled. */ | |
1686 | #ifdef DWARF2_DEBUGGING_INFO | |
1687 | if (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) | |
1688 | return UI_DWARF2; | |
1689 | #endif | |
1690 | ||
1691 | return UI_NONE; | |
1692 | } | |
1693 | ||
ff050c66 MF |
1694 | /* Determine the correct mode for a Dwarf frame register that represents |
1695 | register REGNO. */ | |
1696 | ||
ef4bddc2 | 1697 | machine_mode |
ff050c66 MF |
1698 | default_dwarf_frame_reg_mode (int regno) |
1699 | { | |
ef4bddc2 | 1700 | machine_mode save_mode = reg_raw_mode[regno]; |
ff050c66 MF |
1701 | |
1702 | if (HARD_REGNO_CALL_PART_CLOBBERED (regno, save_mode)) | |
1703 | save_mode = choose_hard_reg_mode (regno, 1, true); | |
1704 | return save_mode; | |
1705 | } | |
1706 | ||
ffa88471 SE |
1707 | /* To be used by targets where reg_raw_mode doesn't return the right |
1708 | mode for registers used in apply_builtin_return and apply_builtin_arg. */ | |
1709 | ||
ef4bddc2 | 1710 | machine_mode |
c3284718 | 1711 | default_get_reg_raw_mode (int regno) |
ffa88471 SE |
1712 | { |
1713 | return reg_raw_mode[regno]; | |
1714 | } | |
1715 | ||
d56a43a0 AK |
1716 | /* Return true if a leaf function should stay leaf even with profiling |
1717 | enabled. */ | |
1718 | ||
1719 | bool | |
1720 | default_keep_leaf_when_profiled () | |
1721 | { | |
1722 | return false; | |
1723 | } | |
1724 | ||
a803773f JM |
1725 | /* Return true if the state of option OPTION should be stored in PCH files |
1726 | and checked by default_pch_valid_p. Store the option's current state | |
1727 | in STATE if so. */ | |
1728 | ||
1729 | static inline bool | |
1730 | option_affects_pch_p (int option, struct cl_option_state *state) | |
1731 | { | |
1732 | if ((cl_options[option].flags & CL_TARGET) == 0) | |
1733 | return false; | |
212bfe71 JR |
1734 | if ((cl_options[option].flags & CL_PCH_IGNORE) != 0) |
1735 | return false; | |
a803773f JM |
1736 | if (option_flag_var (option, &global_options) == &target_flags) |
1737 | if (targetm.check_pch_target_flags) | |
1738 | return false; | |
1739 | return get_option_state (&global_options, option, state); | |
1740 | } | |
1741 | ||
1742 | /* Default version of get_pch_validity. | |
1743 | By default, every flag difference is fatal; that will be mostly right for | |
1744 | most targets, but completely right for very few. */ | |
1745 | ||
1746 | void * | |
1747 | default_get_pch_validity (size_t *sz) | |
1748 | { | |
1749 | struct cl_option_state state; | |
1750 | size_t i; | |
1751 | char *result, *r; | |
1752 | ||
1753 | *sz = 2; | |
1754 | if (targetm.check_pch_target_flags) | |
1755 | *sz += sizeof (target_flags); | |
1756 | for (i = 0; i < cl_options_count; i++) | |
1757 | if (option_affects_pch_p (i, &state)) | |
1758 | *sz += state.size; | |
1759 | ||
1760 | result = r = XNEWVEC (char, *sz); | |
1761 | r[0] = flag_pic; | |
1762 | r[1] = flag_pie; | |
1763 | r += 2; | |
1764 | if (targetm.check_pch_target_flags) | |
1765 | { | |
1766 | memcpy (r, &target_flags, sizeof (target_flags)); | |
1767 | r += sizeof (target_flags); | |
1768 | } | |
1769 | ||
1770 | for (i = 0; i < cl_options_count; i++) | |
1771 | if (option_affects_pch_p (i, &state)) | |
1772 | { | |
1773 | memcpy (r, state.data, state.size); | |
1774 | r += state.size; | |
1775 | } | |
1776 | ||
1777 | return result; | |
1778 | } | |
1779 | ||
1780 | /* Return a message which says that a PCH file was created with a different | |
1781 | setting of OPTION. */ | |
1782 | ||
1783 | static const char * | |
1784 | pch_option_mismatch (const char *option) | |
1785 | { | |
582f770b UB |
1786 | return xasprintf (_("created and used with differing settings of '%s'"), |
1787 | option); | |
a803773f JM |
1788 | } |
1789 | ||
1790 | /* Default version of pch_valid_p. */ | |
1791 | ||
1792 | const char * | |
1793 | default_pch_valid_p (const void *data_p, size_t len) | |
1794 | { | |
1795 | struct cl_option_state state; | |
1796 | const char *data = (const char *)data_p; | |
1797 | size_t i; | |
1798 | ||
1799 | /* -fpic and -fpie also usually make a PCH invalid. */ | |
1800 | if (data[0] != flag_pic) | |
1801 | return _("created and used with different settings of -fpic"); | |
1802 | if (data[1] != flag_pie) | |
1803 | return _("created and used with different settings of -fpie"); | |
1804 | data += 2; | |
1805 | ||
1806 | /* Check target_flags. */ | |
1807 | if (targetm.check_pch_target_flags) | |
1808 | { | |
1809 | int tf; | |
1810 | const char *r; | |
1811 | ||
1812 | memcpy (&tf, data, sizeof (target_flags)); | |
1813 | data += sizeof (target_flags); | |
1814 | len -= sizeof (target_flags); | |
1815 | r = targetm.check_pch_target_flags (tf); | |
1816 | if (r != NULL) | |
1817 | return r; | |
1818 | } | |
1819 | ||
1820 | for (i = 0; i < cl_options_count; i++) | |
1821 | if (option_affects_pch_p (i, &state)) | |
1822 | { | |
1823 | if (memcmp (data, state.data, state.size) != 0) | |
1824 | return pch_option_mismatch (cl_options[i].opt_text); | |
1825 | data += state.size; | |
1826 | len -= state.size; | |
1827 | } | |
1828 | ||
1829 | return NULL; | |
1830 | } | |
1831 | ||
42e37616 DM |
1832 | /* Default version of cstore_mode. */ |
1833 | ||
ef4bddc2 | 1834 | machine_mode |
42e37616 DM |
1835 | default_cstore_mode (enum insn_code icode) |
1836 | { | |
1837 | return insn_data[(int) icode].operand[0].mode; | |
1838 | } | |
1839 | ||
d9886a9e L |
1840 | /* Default version of member_type_forces_blk. */ |
1841 | ||
1842 | bool | |
ef4bddc2 | 1843 | default_member_type_forces_blk (const_tree, machine_mode) |
d9886a9e L |
1844 | { |
1845 | return false; | |
1846 | } | |
1847 | ||
d5e254e1 IE |
1848 | rtx |
1849 | default_load_bounds_for_arg (rtx addr ATTRIBUTE_UNUSED, | |
1850 | rtx ptr ATTRIBUTE_UNUSED, | |
1851 | rtx bnd ATTRIBUTE_UNUSED) | |
1852 | { | |
1853 | gcc_unreachable (); | |
1854 | } | |
1855 | ||
1856 | void | |
1857 | default_store_bounds_for_arg (rtx val ATTRIBUTE_UNUSED, | |
1858 | rtx addr ATTRIBUTE_UNUSED, | |
1859 | rtx bounds ATTRIBUTE_UNUSED, | |
1860 | rtx to ATTRIBUTE_UNUSED) | |
1861 | { | |
1862 | gcc_unreachable (); | |
1863 | } | |
1864 | ||
1865 | rtx | |
1866 | default_load_returned_bounds (rtx slot ATTRIBUTE_UNUSED) | |
1867 | { | |
1868 | gcc_unreachable (); | |
1869 | } | |
1870 | ||
1871 | void | |
1872 | default_store_returned_bounds (rtx slot ATTRIBUTE_UNUSED, | |
1873 | rtx bounds ATTRIBUTE_UNUSED) | |
1874 | { | |
1875 | gcc_unreachable (); | |
1876 | } | |
1877 | ||
f236ac95 RB |
1878 | /* Default version of canonicalize_comparison. */ |
1879 | ||
1880 | void | |
1881 | default_canonicalize_comparison (int *, rtx *, rtx *, bool) | |
1882 | { | |
1883 | } | |
1884 | ||
267bac10 JM |
1885 | /* Default implementation of TARGET_ATOMIC_ASSIGN_EXPAND_FENV. */ |
1886 | ||
1887 | void | |
1888 | default_atomic_assign_expand_fenv (tree *, tree *, tree *) | |
1889 | { | |
1890 | } | |
1891 | ||
4a7cb16f AM |
1892 | #ifndef PAD_VARARGS_DOWN |
1893 | #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN | |
1894 | #endif | |
1895 | ||
1896 | /* Build an indirect-ref expression over the given TREE, which represents a | |
1897 | piece of a va_arg() expansion. */ | |
1898 | tree | |
1899 | build_va_arg_indirect_ref (tree addr) | |
1900 | { | |
1901 | addr = build_simple_mem_ref_loc (EXPR_LOCATION (addr), addr); | |
4a7cb16f AM |
1902 | return addr; |
1903 | } | |
1904 | ||
1905 | /* The "standard" implementation of va_arg: read the value from the | |
1906 | current (padded) address and increment by the (padded) size. */ | |
1907 | ||
1908 | tree | |
1909 | std_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, | |
1910 | gimple_seq *post_p) | |
1911 | { | |
1912 | tree addr, t, type_size, rounded_size, valist_tmp; | |
1913 | unsigned HOST_WIDE_INT align, boundary; | |
1914 | bool indirect; | |
1915 | ||
4a7cb16f AM |
1916 | /* All of the alignment and movement below is for args-grow-up machines. |
1917 | As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all | |
1918 | implement their own specialized gimplify_va_arg_expr routines. */ | |
6dad9361 TS |
1919 | if (ARGS_GROW_DOWNWARD) |
1920 | gcc_unreachable (); | |
4a7cb16f AM |
1921 | |
1922 | indirect = pass_by_reference (NULL, TYPE_MODE (type), type, false); | |
1923 | if (indirect) | |
1924 | type = build_pointer_type (type); | |
1925 | ||
1926 | align = PARM_BOUNDARY / BITS_PER_UNIT; | |
1927 | boundary = targetm.calls.function_arg_boundary (TYPE_MODE (type), type); | |
1928 | ||
1929 | /* When we align parameter on stack for caller, if the parameter | |
1930 | alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be | |
1931 | aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee | |
1932 | here with caller. */ | |
1933 | if (boundary > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1934 | boundary = MAX_SUPPORTED_STACK_ALIGNMENT; | |
1935 | ||
1936 | boundary /= BITS_PER_UNIT; | |
1937 | ||
1938 | /* Hoist the valist value into a temporary for the moment. */ | |
1939 | valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL); | |
1940 | ||
1941 | /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually | |
1942 | requires greater alignment, we must perform dynamic alignment. */ | |
1943 | if (boundary > align | |
1944 | && !integer_zerop (TYPE_SIZE (type))) | |
1945 | { | |
1946 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, | |
1947 | fold_build_pointer_plus_hwi (valist_tmp, boundary - 1)); | |
1948 | gimplify_and_add (t, pre_p); | |
1949 | ||
1950 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, | |
1951 | fold_build2 (BIT_AND_EXPR, TREE_TYPE (valist), | |
1952 | valist_tmp, | |
1953 | build_int_cst (TREE_TYPE (valist), -boundary))); | |
1954 | gimplify_and_add (t, pre_p); | |
1955 | } | |
1956 | else | |
1957 | boundary = align; | |
1958 | ||
1959 | /* If the actual alignment is less than the alignment of the type, | |
1960 | adjust the type accordingly so that we don't assume strict alignment | |
1961 | when dereferencing the pointer. */ | |
1962 | boundary *= BITS_PER_UNIT; | |
1963 | if (boundary < TYPE_ALIGN (type)) | |
1964 | { | |
1965 | type = build_variant_type_copy (type); | |
fe37c7af | 1966 | SET_TYPE_ALIGN (type, boundary); |
4a7cb16f AM |
1967 | } |
1968 | ||
1969 | /* Compute the rounded size of the type. */ | |
1970 | type_size = size_in_bytes (type); | |
1971 | rounded_size = round_up (type_size, align); | |
1972 | ||
1973 | /* Reduce rounded_size so it's sharable with the postqueue. */ | |
1974 | gimplify_expr (&rounded_size, pre_p, post_p, is_gimple_val, fb_rvalue); | |
1975 | ||
1976 | /* Get AP. */ | |
1977 | addr = valist_tmp; | |
1978 | if (PAD_VARARGS_DOWN && !integer_zerop (rounded_size)) | |
1979 | { | |
1980 | /* Small args are padded downward. */ | |
1981 | t = fold_build2_loc (input_location, GT_EXPR, sizetype, | |
1982 | rounded_size, size_int (align)); | |
1983 | t = fold_build3 (COND_EXPR, sizetype, t, size_zero_node, | |
1984 | size_binop (MINUS_EXPR, rounded_size, type_size)); | |
1985 | addr = fold_build_pointer_plus (addr, t); | |
1986 | } | |
1987 | ||
1988 | /* Compute new value for AP. */ | |
1989 | t = fold_build_pointer_plus (valist_tmp, rounded_size); | |
1990 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist, t); | |
1991 | gimplify_and_add (t, pre_p); | |
1992 | ||
1993 | addr = fold_convert (build_pointer_type (type), addr); | |
1994 | ||
1995 | if (indirect) | |
1996 | addr = build_va_arg_indirect_ref (addr); | |
1997 | ||
1998 | return build_va_arg_indirect_ref (addr); | |
1999 | } | |
2000 | ||
d5e254e1 IE |
2001 | tree |
2002 | default_chkp_bound_type (void) | |
2003 | { | |
2004 | tree res = make_node (POINTER_BOUNDS_TYPE); | |
2005 | TYPE_PRECISION (res) = TYPE_PRECISION (size_type_node) * 2; | |
2006 | TYPE_NAME (res) = get_identifier ("__bounds_type"); | |
2007 | SET_TYPE_MODE (res, targetm.chkp_bound_mode ()); | |
2008 | layout_type (res); | |
2009 | return res; | |
2010 | } | |
2011 | ||
b8506a8a | 2012 | machine_mode |
d5e254e1 IE |
2013 | default_chkp_bound_mode (void) |
2014 | { | |
2015 | return VOIDmode; | |
2016 | } | |
2017 | ||
2018 | tree | |
2019 | default_builtin_chkp_function (unsigned int fcode ATTRIBUTE_UNUSED) | |
2020 | { | |
2021 | return NULL_TREE; | |
2022 | } | |
2023 | ||
2024 | rtx | |
2025 | default_chkp_function_value_bounds (const_tree ret_type ATTRIBUTE_UNUSED, | |
2026 | const_tree fn_decl_or_type ATTRIBUTE_UNUSED, | |
2027 | bool outgoing ATTRIBUTE_UNUSED) | |
2028 | { | |
2029 | gcc_unreachable (); | |
2030 | } | |
2031 | ||
2032 | tree | |
2033 | default_chkp_make_bounds_constant (HOST_WIDE_INT lb ATTRIBUTE_UNUSED, | |
2034 | HOST_WIDE_INT ub ATTRIBUTE_UNUSED) | |
2035 | { | |
2036 | return NULL_TREE; | |
2037 | } | |
2038 | ||
2039 | int | |
2040 | default_chkp_initialize_bounds (tree var ATTRIBUTE_UNUSED, | |
2041 | tree lb ATTRIBUTE_UNUSED, | |
2042 | tree ub ATTRIBUTE_UNUSED, | |
2043 | tree *stmts ATTRIBUTE_UNUSED) | |
2044 | { | |
2045 | return 0; | |
2046 | } | |
2047 | ||
2048 | void | |
2049 | default_setup_incoming_vararg_bounds (cumulative_args_t ca ATTRIBUTE_UNUSED, | |
b8506a8a | 2050 | machine_mode mode ATTRIBUTE_UNUSED, |
d5e254e1 IE |
2051 | tree type ATTRIBUTE_UNUSED, |
2052 | int *pretend_arg_size ATTRIBUTE_UNUSED, | |
2053 | int second_time ATTRIBUTE_UNUSED) | |
2054 | { | |
2055 | } | |
2056 | ||
1d0216c8 RS |
2057 | /* An implementation of TARGET_CAN_USE_DOLOOP_P for targets that do |
2058 | not support nested low-overhead loops. */ | |
2059 | ||
2060 | bool | |
807e902e | 2061 | can_use_doloop_if_innermost (const widest_int &, const widest_int &, |
1d0216c8 RS |
2062 | unsigned int loop_depth, bool) |
2063 | { | |
2064 | return loop_depth == 1; | |
2065 | } | |
4a7cb16f | 2066 | |
d95ab70a RS |
2067 | /* Default implementation of TARGET_OPTAB_SUPPORTED_P. */ |
2068 | ||
2069 | bool | |
2070 | default_optab_supported_p (int, machine_mode, machine_mode, optimization_type) | |
2071 | { | |
2072 | return true; | |
2073 | } | |
2074 | ||
e914c11a JG |
2075 | /* Default implementation of TARGET_MAX_NOCE_IFCVT_SEQ_COST. */ |
2076 | ||
2077 | unsigned int | |
2078 | default_max_noce_ifcvt_seq_cost (edge e) | |
2079 | { | |
2080 | bool predictable_p = predictable_edge_p (e); | |
2081 | ||
2082 | enum compiler_param param | |
2083 | = (predictable_p | |
2084 | ? PARAM_MAX_RTL_IF_CONVERSION_PREDICTABLE_COST | |
2085 | : PARAM_MAX_RTL_IF_CONVERSION_UNPREDICTABLE_COST); | |
2086 | ||
2087 | /* If we have a parameter set, use that, otherwise take a guess using | |
2088 | BRANCH_COST. */ | |
2089 | if (global_options_set.x_param_values[param]) | |
2090 | return PARAM_VALUE (param); | |
2091 | else | |
2092 | return BRANCH_COST (true, predictable_p) * COSTS_N_INSNS (3); | |
2093 | } | |
2094 | ||
894d8b41 EB |
2095 | /* Default implementation of TARGET_MIN_ARITHMETIC_PRECISION. */ |
2096 | ||
2097 | unsigned int | |
2098 | default_min_arithmetic_precision (void) | |
2099 | { | |
2100 | return WORD_REGISTER_OPERATIONS ? BITS_PER_WORD : BITS_PER_UNIT; | |
2101 | } | |
2102 | ||
42e02b20 JG |
2103 | /* Default implementation of TARGET_C_EXCESS_PRECISION. */ |
2104 | ||
2105 | enum flt_eval_method | |
2106 | default_excess_precision (enum excess_precision_type ATTRIBUTE_UNUSED) | |
2107 | { | |
2108 | return FLT_EVAL_METHOD_PROMOTE_TO_FLOAT; | |
2109 | } | |
2110 | ||
7d69de61 | 2111 | #include "gt-targhooks.h" |