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61f71b34 | 1 | /* Default target hook functions. |
5624e564 | 2 | Copyright (C) 2003-2015 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" | |
52 | #include "tm.h" | |
61f71b34 | 53 | #include "rtl.h" |
40e23961 | 54 | #include "alias.h" |
61f71b34 | 55 | #include "tree.h" |
40e23961 | 56 | #include "fold-const.h" |
d8a2d370 DN |
57 | #include "stor-layout.h" |
58 | #include "varasm.h" | |
36566b39 PK |
59 | #include "function.h" |
60 | #include "flags.h" | |
36566b39 PK |
61 | #include "insn-config.h" |
62 | #include "expmed.h" | |
63 | #include "dojump.h" | |
64 | #include "explow.h" | |
65 | #include "calls.h" | |
66 | #include "emit-rtl.h" | |
67 | #include "stmt.h" | |
61f71b34 | 68 | #include "expr.h" |
d84a4ef1 | 69 | #include "output.h" |
718f9c0f | 70 | #include "diagnostic-core.h" |
61f71b34 DD |
71 | #include "target.h" |
72 | #include "tm_p.h" | |
ffa88471 | 73 | #include "regs.h" |
8a99f6f9 | 74 | #include "reload.h" |
b0710fe1 | 75 | #include "insn-codes.h" |
8a99f6f9 R |
76 | #include "optabs.h" |
77 | #include "recog.h" | |
a803773f JM |
78 | #include "intl.h" |
79 | #include "opts.h" | |
2fb9a547 AM |
80 | #include "tree-ssa-alias.h" |
81 | #include "gimple-expr.h" | |
45b0be94 | 82 | #include "gimplify.h" |
d8a2d370 | 83 | #include "stringpool.h" |
442b4905 | 84 | #include "tree-ssanames.h" |
61f71b34 | 85 | |
6dd53648 | 86 | |
c6c3dba9 | 87 | bool |
ef4bddc2 | 88 | default_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED, |
c6c3dba9 PB |
89 | rtx addr ATTRIBUTE_UNUSED, |
90 | bool strict ATTRIBUTE_UNUSED) | |
91 | { | |
92 | #ifdef GO_IF_LEGITIMATE_ADDRESS | |
93 | /* Defer to the old implementation using a goto. */ | |
94 | if (strict) | |
95 | return strict_memory_address_p (mode, addr); | |
96 | else | |
97 | return memory_address_p (mode, addr); | |
98 | #else | |
99 | gcc_unreachable (); | |
100 | #endif | |
101 | } | |
102 | ||
6773a41c RO |
103 | void |
104 | default_external_libcall (rtx fun ATTRIBUTE_UNUSED) | |
105 | { | |
106 | #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL | |
c3284718 | 107 | ASM_OUTPUT_EXTERNAL_LIBCALL (asm_out_file, fun); |
6773a41c RO |
108 | #endif |
109 | } | |
110 | ||
215b063c PB |
111 | int |
112 | default_unspec_may_trap_p (const_rtx x, unsigned flags) | |
113 | { | |
114 | int i; | |
115 | ||
c84a808e EB |
116 | /* Any floating arithmetic may trap. */ |
117 | if ((SCALAR_FLOAT_MODE_P (GET_MODE (x)) && flag_trapping_math)) | |
215b063c PB |
118 | return 1; |
119 | ||
120 | for (i = 0; i < XVECLEN (x, 0); ++i) | |
121 | { | |
122 | if (may_trap_p_1 (XVECEXP (x, 0, i), flags)) | |
123 | return 1; | |
124 | } | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
ef4bddc2 | 129 | machine_mode |
cde0f3fd | 130 | default_promote_function_mode (const_tree type ATTRIBUTE_UNUSED, |
ef4bddc2 | 131 | machine_mode mode, |
cde0f3fd PB |
132 | int *punsignedp ATTRIBUTE_UNUSED, |
133 | const_tree funtype ATTRIBUTE_UNUSED, | |
134 | int for_return ATTRIBUTE_UNUSED) | |
135 | { | |
5e617be8 | 136 | if (type != NULL_TREE && for_return == 2) |
666e3ceb | 137 | return promote_mode (type, mode, punsignedp); |
cde0f3fd PB |
138 | return mode; |
139 | } | |
140 | ||
ef4bddc2 | 141 | machine_mode |
cde0f3fd | 142 | default_promote_function_mode_always_promote (const_tree type, |
ef4bddc2 | 143 | machine_mode mode, |
cde0f3fd PB |
144 | int *punsignedp, |
145 | const_tree funtype ATTRIBUTE_UNUSED, | |
146 | int for_return ATTRIBUTE_UNUSED) | |
147 | { | |
148 | return promote_mode (type, mode, punsignedp); | |
149 | } | |
150 | ||
ef4bddc2 RS |
151 | machine_mode |
152 | default_cc_modes_compatible (machine_mode m1, machine_mode m2) | |
e129d93a ILT |
153 | { |
154 | if (m1 == m2) | |
155 | return m1; | |
156 | return VOIDmode; | |
157 | } | |
158 | ||
61f71b34 | 159 | bool |
586de218 KG |
160 | default_return_in_memory (const_tree type, |
161 | const_tree fntype ATTRIBUTE_UNUSED) | |
61f71b34 | 162 | { |
33d05111 | 163 | return (TYPE_MODE (type) == BLKmode); |
61f71b34 DD |
164 | } |
165 | ||
506d7b68 PB |
166 | rtx |
167 | default_legitimize_address (rtx x, rtx orig_x ATTRIBUTE_UNUSED, | |
ef4bddc2 | 168 | machine_mode mode ATTRIBUTE_UNUSED) |
506d7b68 PB |
169 | { |
170 | return x; | |
171 | } | |
172 | ||
14133a4d KK |
173 | bool |
174 | default_legitimize_address_displacement (rtx *disp ATTRIBUTE_UNUSED, | |
175 | rtx *offset ATTRIBUTE_UNUSED, | |
176 | machine_mode mode ATTRIBUTE_UNUSED) | |
177 | { | |
178 | return false; | |
179 | } | |
180 | ||
61f71b34 DD |
181 | rtx |
182 | default_expand_builtin_saveregs (void) | |
183 | { | |
61f71b34 DD |
184 | error ("__builtin_saveregs not supported by this target"); |
185 | return const0_rtx; | |
61f71b34 DD |
186 | } |
187 | ||
188 | void | |
d5cc9181 | 189 | default_setup_incoming_varargs (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 190 | machine_mode mode ATTRIBUTE_UNUSED, |
61f71b34 DD |
191 | tree type ATTRIBUTE_UNUSED, |
192 | int *pretend_arg_size ATTRIBUTE_UNUSED, | |
193 | int second_time ATTRIBUTE_UNUSED) | |
194 | { | |
61f71b34 DD |
195 | } |
196 | ||
d6da68b9 KH |
197 | /* The default implementation of TARGET_BUILTIN_SETJMP_FRAME_VALUE. */ |
198 | ||
199 | rtx | |
200 | default_builtin_setjmp_frame_value (void) | |
201 | { | |
202 | return virtual_stack_vars_rtx; | |
203 | } | |
204 | ||
3a4d587b | 205 | /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns false. */ |
8dfa8fcd | 206 | |
61f71b34 | 207 | bool |
d5cc9181 | 208 | hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t ca ATTRIBUTE_UNUSED) |
61f71b34 | 209 | { |
b602b7b6 | 210 | return false; |
61f71b34 DD |
211 | } |
212 | ||
213 | bool | |
d5cc9181 | 214 | default_pretend_outgoing_varargs_named (cumulative_args_t ca ATTRIBUTE_UNUSED) |
61f71b34 | 215 | { |
3a4d587b AM |
216 | return (targetm.calls.setup_incoming_varargs |
217 | != default_setup_incoming_varargs); | |
61f71b34 | 218 | } |
c6e8c921 | 219 | |
ef4bddc2 | 220 | machine_mode |
93f90be6 FJ |
221 | default_eh_return_filter_mode (void) |
222 | { | |
7b0518e3 | 223 | return targetm.unwind_word_mode (); |
93f90be6 FJ |
224 | } |
225 | ||
ef4bddc2 | 226 | machine_mode |
c7ff6e7a AK |
227 | default_libgcc_cmp_return_mode (void) |
228 | { | |
229 | return word_mode; | |
230 | } | |
231 | ||
ef4bddc2 | 232 | machine_mode |
c7ff6e7a AK |
233 | default_libgcc_shift_count_mode (void) |
234 | { | |
235 | return word_mode; | |
236 | } | |
237 | ||
ef4bddc2 | 238 | machine_mode |
7b0518e3 UW |
239 | default_unwind_word_mode (void) |
240 | { | |
241 | return word_mode; | |
242 | } | |
243 | ||
273a2526 RS |
244 | /* The default implementation of TARGET_SHIFT_TRUNCATION_MASK. */ |
245 | ||
246 | unsigned HOST_WIDE_INT | |
ef4bddc2 | 247 | default_shift_truncation_mask (machine_mode mode) |
273a2526 RS |
248 | { |
249 | return SHIFT_COUNT_TRUNCATED ? GET_MODE_BITSIZE (mode) - 1 : 0; | |
250 | } | |
251 | ||
bc23502b PB |
252 | /* The default implementation of TARGET_MIN_DIVISIONS_FOR_RECIP_MUL. */ |
253 | ||
254 | unsigned int | |
ef4bddc2 | 255 | default_min_divisions_for_recip_mul (machine_mode mode ATTRIBUTE_UNUSED) |
bc23502b PB |
256 | { |
257 | return have_insn_for (DIV, mode) ? 3 : 2; | |
258 | } | |
259 | ||
b12cbf2c AN |
260 | /* The default implementation of TARGET_MODE_REP_EXTENDED. */ |
261 | ||
262 | int | |
ef4bddc2 RS |
263 | default_mode_rep_extended (machine_mode mode ATTRIBUTE_UNUSED, |
264 | machine_mode mode_rep ATTRIBUTE_UNUSED) | |
b12cbf2c AN |
265 | { |
266 | return UNKNOWN; | |
267 | } | |
268 | ||
c6e8c921 | 269 | /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns true. */ |
0938c9e8 | 270 | |
c6e8c921 | 271 | bool |
d5cc9181 | 272 | hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t a ATTRIBUTE_UNUSED) |
c6e8c921 GK |
273 | { |
274 | return true; | |
275 | } | |
4185ae53 | 276 | |
c77cd3d1 UB |
277 | /* Return machine mode for non-standard suffix |
278 | or VOIDmode if non-standard suffixes are unsupported. */ | |
ef4bddc2 | 279 | machine_mode |
c77cd3d1 UB |
280 | default_mode_for_suffix (char suffix ATTRIBUTE_UNUSED) |
281 | { | |
282 | return VOIDmode; | |
283 | } | |
4185ae53 PB |
284 | |
285 | /* The generic C++ ABI specifies this is a 64-bit value. */ | |
286 | tree | |
287 | default_cxx_guard_type (void) | |
288 | { | |
289 | return long_long_integer_type_node; | |
290 | } | |
46e995e0 | 291 | |
46e995e0 PB |
292 | /* Returns the size of the cookie to use when allocating an array |
293 | whose elements have the indicated TYPE. Assumes that it is already | |
294 | known that a cookie is needed. */ | |
295 | ||
296 | tree | |
297 | default_cxx_get_cookie_size (tree type) | |
298 | { | |
299 | tree cookie_size; | |
300 | ||
301 | /* We need to allocate an additional max (sizeof (size_t), alignof | |
302 | (true_type)) bytes. */ | |
303 | tree sizetype_size; | |
304 | tree type_align; | |
a1c496cb | 305 | |
46e995e0 PB |
306 | sizetype_size = size_in_bytes (sizetype); |
307 | type_align = size_int (TYPE_ALIGN_UNIT (type)); | |
807e902e | 308 | if (tree_int_cst_lt (type_align, sizetype_size)) |
46e995e0 PB |
309 | cookie_size = sizetype_size; |
310 | else | |
311 | cookie_size = type_align; | |
312 | ||
313 | return cookie_size; | |
314 | } | |
8cd5a4e0 | 315 | |
8cd5a4e0 RH |
316 | /* Return true if a parameter must be passed by reference. This version |
317 | of the TARGET_PASS_BY_REFERENCE hook uses just MUST_PASS_IN_STACK. */ | |
318 | ||
319 | bool | |
d5cc9181 | 320 | hook_pass_by_reference_must_pass_in_stack (cumulative_args_t c ATTRIBUTE_UNUSED, |
ef4bddc2 | 321 | machine_mode mode ATTRIBUTE_UNUSED, const_tree type ATTRIBUTE_UNUSED, |
8cd5a4e0 RH |
322 | bool named_arg ATTRIBUTE_UNUSED) |
323 | { | |
324 | return targetm.calls.must_pass_in_stack (mode, type); | |
325 | } | |
951120ea | 326 | |
6cdd5672 RH |
327 | /* Return true if a parameter follows callee copies conventions. This |
328 | version of the hook is true for all named arguments. */ | |
329 | ||
330 | bool | |
d5cc9181 | 331 | hook_callee_copies_named (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 332 | machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 333 | const_tree type ATTRIBUTE_UNUSED, bool named) |
6cdd5672 RH |
334 | { |
335 | return named; | |
336 | } | |
951120ea | 337 | |
6e2188e0 NF |
338 | /* Emit to STREAM the assembler syntax for insn operand X. */ |
339 | ||
340 | void | |
341 | default_print_operand (FILE *stream ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, | |
342 | int code ATTRIBUTE_UNUSED) | |
343 | { | |
344 | #ifdef PRINT_OPERAND | |
345 | PRINT_OPERAND (stream, x, code); | |
346 | #else | |
347 | gcc_unreachable (); | |
348 | #endif | |
349 | } | |
350 | ||
351 | /* Emit to STREAM the assembler syntax for an insn operand whose memory | |
352 | address is X. */ | |
353 | ||
354 | void | |
355 | default_print_operand_address (FILE *stream ATTRIBUTE_UNUSED, | |
356 | rtx x ATTRIBUTE_UNUSED) | |
357 | { | |
358 | #ifdef PRINT_OPERAND_ADDRESS | |
359 | PRINT_OPERAND_ADDRESS (stream, x); | |
360 | #else | |
361 | gcc_unreachable (); | |
362 | #endif | |
363 | } | |
364 | ||
365 | /* Return true if CODE is a valid punctuation character for the | |
366 | `print_operand' hook. */ | |
367 | ||
368 | bool | |
369 | default_print_operand_punct_valid_p (unsigned char code ATTRIBUTE_UNUSED) | |
370 | { | |
371 | #ifdef PRINT_OPERAND_PUNCT_VALID_P | |
372 | return PRINT_OPERAND_PUNCT_VALID_P (code); | |
373 | #else | |
374 | return false; | |
375 | #endif | |
376 | } | |
377 | ||
77754180 DK |
378 | /* The default implementation of TARGET_MANGLE_ASSEMBLER_NAME. */ |
379 | tree | |
380 | default_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED) | |
381 | { | |
382 | const char *skipped = name + (*name == '*' ? 1 : 0); | |
383 | const char *stripped = targetm.strip_name_encoding (skipped); | |
384 | if (*name != '*' && user_label_prefix[0]) | |
385 | stripped = ACONCAT ((user_label_prefix, stripped, NULL)); | |
386 | return get_identifier (stripped); | |
387 | } | |
388 | ||
6dd53648 RH |
389 | /* True if MODE is valid for the target. By "valid", we mean able to |
390 | be manipulated in non-trivial ways. In particular, this means all | |
391 | the arithmetic is supported. | |
392 | ||
393 | By default we guess this means that any C type is supported. If | |
394 | we can't map the mode back to a type that would be available in C, | |
395 | then reject it. Special case, here, is the double-word arithmetic | |
396 | supported by optabs.c. */ | |
397 | ||
398 | bool | |
ef4bddc2 | 399 | default_scalar_mode_supported_p (machine_mode mode) |
6dd53648 RH |
400 | { |
401 | int precision = GET_MODE_PRECISION (mode); | |
402 | ||
403 | switch (GET_MODE_CLASS (mode)) | |
404 | { | |
405 | case MODE_PARTIAL_INT: | |
406 | case MODE_INT: | |
407 | if (precision == CHAR_TYPE_SIZE) | |
408 | return true; | |
409 | if (precision == SHORT_TYPE_SIZE) | |
410 | return true; | |
411 | if (precision == INT_TYPE_SIZE) | |
412 | return true; | |
413 | if (precision == LONG_TYPE_SIZE) | |
414 | return true; | |
415 | if (precision == LONG_LONG_TYPE_SIZE) | |
416 | return true; | |
417 | if (precision == 2 * BITS_PER_WORD) | |
418 | return true; | |
419 | return false; | |
420 | ||
421 | case MODE_FLOAT: | |
422 | if (precision == FLOAT_TYPE_SIZE) | |
423 | return true; | |
424 | if (precision == DOUBLE_TYPE_SIZE) | |
425 | return true; | |
426 | if (precision == LONG_DOUBLE_TYPE_SIZE) | |
427 | return true; | |
428 | return false; | |
429 | ||
9a8ce21f | 430 | case MODE_DECIMAL_FLOAT: |
ab22c1fa CF |
431 | case MODE_FRACT: |
432 | case MODE_UFRACT: | |
433 | case MODE_ACCUM: | |
434 | case MODE_UACCUM: | |
9a8ce21f JG |
435 | return false; |
436 | ||
6dd53648 | 437 | default: |
1e128c5f | 438 | gcc_unreachable (); |
6dd53648 RH |
439 | } |
440 | } | |
6cdd5672 | 441 | |
8cc4b7a2 JM |
442 | /* Return true if libgcc supports floating-point mode MODE (known to |
443 | be supported as a scalar mode). */ | |
444 | ||
445 | bool | |
ef4bddc2 | 446 | default_libgcc_floating_mode_supported_p (machine_mode mode) |
8cc4b7a2 JM |
447 | { |
448 | switch (mode) | |
449 | { | |
450 | #ifdef HAVE_SFmode | |
451 | case SFmode: | |
452 | #endif | |
453 | #ifdef HAVE_DFmode | |
454 | case DFmode: | |
455 | #endif | |
456 | #ifdef HAVE_XFmode | |
457 | case XFmode: | |
458 | #endif | |
459 | #ifdef HAVE_TFmode | |
460 | case TFmode: | |
461 | #endif | |
462 | return true; | |
463 | ||
464 | default: | |
465 | return false; | |
466 | } | |
467 | } | |
468 | ||
2e681adf JR |
469 | /* Make some target macros useable by target-independent code. */ |
470 | bool | |
471 | targhook_words_big_endian (void) | |
472 | { | |
473 | return !!WORDS_BIG_ENDIAN; | |
474 | } | |
475 | ||
476 | bool | |
477 | targhook_float_words_big_endian (void) | |
478 | { | |
479 | return !!FLOAT_WORDS_BIG_ENDIAN; | |
480 | } | |
481 | ||
9193fb05 JM |
482 | /* True if the target supports floating-point exceptions and rounding |
483 | modes. */ | |
484 | ||
485 | bool | |
486 | default_float_exceptions_rounding_supported_p (void) | |
487 | { | |
488 | #ifdef HAVE_adddf3 | |
489 | return HAVE_adddf3; | |
490 | #else | |
491 | return false; | |
492 | #endif | |
493 | } | |
494 | ||
0884546e BE |
495 | /* True if the target supports decimal floating point. */ |
496 | ||
497 | bool | |
498 | default_decimal_float_supported_p (void) | |
499 | { | |
500 | return ENABLE_DECIMAL_FLOAT; | |
501 | } | |
502 | ||
ab22c1fa CF |
503 | /* True if the target supports fixed-point arithmetic. */ |
504 | ||
505 | bool | |
506 | default_fixed_point_supported_p (void) | |
507 | { | |
508 | return ENABLE_FIXED_POINT; | |
509 | } | |
510 | ||
2f251a05 AI |
511 | /* True if the target supports GNU indirect functions. */ |
512 | ||
513 | bool | |
514 | default_has_ifunc_p (void) | |
515 | { | |
516 | return HAVE_GNU_INDIRECT_FUNCTION; | |
517 | } | |
518 | ||
e7e64a25 AS |
519 | /* NULL if INSN insn is valid within a low-overhead loop, otherwise returns |
520 | an error message. | |
b8698a0f | 521 | |
0fa2e4df | 522 | This function checks whether a given INSN is valid within a low-overhead |
e7e64a25 AS |
523 | loop. If INSN is invalid it returns the reason for that, otherwise it |
524 | returns NULL. A called function may clobber any special registers required | |
525 | for low-overhead looping. Additionally, some targets (eg, PPC) use the count | |
a71a498d AS |
526 | register for branch on table instructions. We reject the doloop pattern in |
527 | these cases. */ | |
528 | ||
e7e64a25 | 529 | const char * |
ac44248e | 530 | default_invalid_within_doloop (const rtx_insn *insn) |
a71a498d AS |
531 | { |
532 | if (CALL_P (insn)) | |
e7e64a25 | 533 | return "Function call in loop."; |
b8698a0f | 534 | |
39718607 | 535 | if (tablejump_p (insn, NULL, NULL) || computed_jump_p (insn)) |
e7e64a25 | 536 | return "Computed branch in the loop."; |
b8698a0f | 537 | |
e7e64a25 | 538 | return NULL; |
a71a498d AS |
539 | } |
540 | ||
2505a3f2 RG |
541 | /* Mapping of builtin functions to vectorized variants. */ |
542 | ||
543 | tree | |
62f7fd21 | 544 | default_builtin_vectorized_function (tree fndecl ATTRIBUTE_UNUSED, |
b95becfc RG |
545 | tree type_out ATTRIBUTE_UNUSED, |
546 | tree type_in ATTRIBUTE_UNUSED) | |
2505a3f2 RG |
547 | { |
548 | return NULL_TREE; | |
549 | } | |
550 | ||
f57d17f1 TM |
551 | /* Vectorized conversion. */ |
552 | ||
553 | tree | |
744aa42f | 554 | default_builtin_vectorized_conversion (unsigned int code ATTRIBUTE_UNUSED, |
88dd7150 RG |
555 | tree dest_type ATTRIBUTE_UNUSED, |
556 | tree src_type ATTRIBUTE_UNUSED) | |
f57d17f1 TM |
557 | { |
558 | return NULL_TREE; | |
559 | } | |
560 | ||
35e1a5e7 IR |
561 | /* Default vectorizer cost model values. */ |
562 | ||
563 | int | |
720f5239 | 564 | default_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost, |
a21892ad | 565 | tree vectype, |
720f5239 | 566 | int misalign ATTRIBUTE_UNUSED) |
35e1a5e7 | 567 | { |
a21892ad BS |
568 | unsigned elements; |
569 | ||
35e1a5e7 IR |
570 | switch (type_of_cost) |
571 | { | |
572 | case scalar_stmt: | |
573 | case scalar_load: | |
574 | case scalar_store: | |
575 | case vector_stmt: | |
576 | case vector_load: | |
577 | case vector_store: | |
578 | case vec_to_scalar: | |
579 | case scalar_to_vec: | |
580 | case cond_branch_not_taken: | |
581 | case vec_perm: | |
8bd37302 | 582 | case vec_promote_demote: |
35e1a5e7 IR |
583 | return 1; |
584 | ||
585 | case unaligned_load: | |
720f5239 | 586 | case unaligned_store: |
35e1a5e7 IR |
587 | return 2; |
588 | ||
589 | case cond_branch_taken: | |
590 | return 3; | |
591 | ||
a21892ad BS |
592 | case vec_construct: |
593 | elements = TYPE_VECTOR_SUBPARTS (vectype); | |
594 | return elements / 2 + 1; | |
595 | ||
35e1a5e7 IR |
596 | default: |
597 | gcc_unreachable (); | |
598 | } | |
599 | } | |
600 | ||
cc2137be UB |
601 | /* Reciprocal. */ |
602 | ||
603 | tree | |
744aa42f | 604 | default_builtin_reciprocal (unsigned int fn ATTRIBUTE_UNUSED, |
ac10986f | 605 | bool md_fn ATTRIBUTE_UNUSED, |
cc2137be UB |
606 | bool sqrt ATTRIBUTE_UNUSED) |
607 | { | |
608 | return NULL_TREE; | |
609 | } | |
610 | ||
6cdd5672 RH |
611 | bool |
612 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false ( | |
d5cc9181 | 613 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 614 | machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 615 | const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
6cdd5672 RH |
616 | { |
617 | return false; | |
618 | } | |
619 | ||
620 | bool | |
621 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true ( | |
d5cc9181 | 622 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 623 | machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 624 | const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
6cdd5672 RH |
625 | { |
626 | return true; | |
627 | } | |
78a52f11 RH |
628 | |
629 | int | |
630 | hook_int_CUMULATIVE_ARGS_mode_tree_bool_0 ( | |
d5cc9181 | 631 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 632 | machine_mode mode ATTRIBUTE_UNUSED, |
78a52f11 RH |
633 | tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
634 | { | |
635 | return 0; | |
636 | } | |
4d3e6fae | 637 | |
3c07301f | 638 | void |
d5cc9181 | 639 | default_function_arg_advance (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 640 | machine_mode mode ATTRIBUTE_UNUSED, |
3c07301f NF |
641 | const_tree type ATTRIBUTE_UNUSED, |
642 | bool named ATTRIBUTE_UNUSED) | |
643 | { | |
3c07301f | 644 | gcc_unreachable (); |
3c07301f NF |
645 | } |
646 | ||
647 | rtx | |
d5cc9181 | 648 | default_function_arg (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 649 | machine_mode mode ATTRIBUTE_UNUSED, |
3c07301f NF |
650 | const_tree type ATTRIBUTE_UNUSED, |
651 | bool named ATTRIBUTE_UNUSED) | |
652 | { | |
3c07301f | 653 | gcc_unreachable (); |
3c07301f NF |
654 | } |
655 | ||
656 | rtx | |
d5cc9181 | 657 | default_function_incoming_arg (cumulative_args_t ca ATTRIBUTE_UNUSED, |
ef4bddc2 | 658 | machine_mode mode ATTRIBUTE_UNUSED, |
3c07301f NF |
659 | const_tree type ATTRIBUTE_UNUSED, |
660 | bool named ATTRIBUTE_UNUSED) | |
661 | { | |
3c07301f | 662 | gcc_unreachable (); |
3c07301f NF |
663 | } |
664 | ||
c2ed6cf8 | 665 | unsigned int |
ef4bddc2 | 666 | default_function_arg_boundary (machine_mode mode ATTRIBUTE_UNUSED, |
c2ed6cf8 NF |
667 | const_tree type ATTRIBUTE_UNUSED) |
668 | { | |
669 | return PARM_BOUNDARY; | |
670 | } | |
671 | ||
123148b5 | 672 | unsigned int |
ef4bddc2 | 673 | default_function_arg_round_boundary (machine_mode mode ATTRIBUTE_UNUSED, |
123148b5 BS |
674 | const_tree type ATTRIBUTE_UNUSED) |
675 | { | |
676 | return PARM_BOUNDARY; | |
677 | } | |
678 | ||
b8698a0f | 679 | void |
912f2dac DB |
680 | hook_void_bitmap (bitmap regs ATTRIBUTE_UNUSED) |
681 | { | |
682 | } | |
683 | ||
4d3e6fae FJ |
684 | const char * |
685 | hook_invalid_arg_for_unprototyped_fn ( | |
3101faab KG |
686 | const_tree typelist ATTRIBUTE_UNUSED, |
687 | const_tree funcdecl ATTRIBUTE_UNUSED, | |
688 | const_tree val ATTRIBUTE_UNUSED) | |
4d3e6fae FJ |
689 | { |
690 | return NULL; | |
691 | } | |
7d69de61 RH |
692 | |
693 | /* Initialize the stack protection decls. */ | |
694 | ||
695 | /* Stack protection related decls living in libgcc. */ | |
696 | static GTY(()) tree stack_chk_guard_decl; | |
697 | ||
698 | tree | |
699 | default_stack_protect_guard (void) | |
700 | { | |
701 | tree t = stack_chk_guard_decl; | |
702 | ||
703 | if (t == NULL) | |
704 | { | |
623a6941 MK |
705 | rtx x; |
706 | ||
c2255bc4 AH |
707 | t = build_decl (UNKNOWN_LOCATION, |
708 | VAR_DECL, get_identifier ("__stack_chk_guard"), | |
7d69de61 RH |
709 | ptr_type_node); |
710 | TREE_STATIC (t) = 1; | |
711 | TREE_PUBLIC (t) = 1; | |
712 | DECL_EXTERNAL (t) = 1; | |
713 | TREE_USED (t) = 1; | |
714 | TREE_THIS_VOLATILE (t) = 1; | |
715 | DECL_ARTIFICIAL (t) = 1; | |
716 | DECL_IGNORED_P (t) = 1; | |
717 | ||
623a6941 MK |
718 | /* Do not share RTL as the declaration is visible outside of |
719 | current function. */ | |
720 | x = DECL_RTL (t); | |
721 | RTX_FLAG (x, used) = 1; | |
722 | ||
7d69de61 RH |
723 | stack_chk_guard_decl = t; |
724 | } | |
725 | ||
726 | return t; | |
727 | } | |
728 | ||
729 | static GTY(()) tree stack_chk_fail_decl; | |
730 | ||
b8698a0f | 731 | tree |
7d69de61 RH |
732 | default_external_stack_protect_fail (void) |
733 | { | |
734 | tree t = stack_chk_fail_decl; | |
735 | ||
736 | if (t == NULL_TREE) | |
737 | { | |
738 | t = build_function_type_list (void_type_node, NULL_TREE); | |
c2255bc4 AH |
739 | t = build_decl (UNKNOWN_LOCATION, |
740 | FUNCTION_DECL, get_identifier ("__stack_chk_fail"), t); | |
7d69de61 RH |
741 | TREE_STATIC (t) = 1; |
742 | TREE_PUBLIC (t) = 1; | |
743 | DECL_EXTERNAL (t) = 1; | |
744 | TREE_USED (t) = 1; | |
745 | TREE_THIS_VOLATILE (t) = 1; | |
746 | TREE_NOTHROW (t) = 1; | |
747 | DECL_ARTIFICIAL (t) = 1; | |
748 | DECL_IGNORED_P (t) = 1; | |
5b5cba1f JM |
749 | DECL_VISIBILITY (t) = VISIBILITY_DEFAULT; |
750 | DECL_VISIBILITY_SPECIFIED (t) = 1; | |
7d69de61 RH |
751 | |
752 | stack_chk_fail_decl = t; | |
753 | } | |
754 | ||
5039610b | 755 | return build_call_expr (t, 0); |
7d69de61 RH |
756 | } |
757 | ||
758 | tree | |
759 | default_hidden_stack_protect_fail (void) | |
760 | { | |
7ce918c5 JJ |
761 | #ifndef HAVE_GAS_HIDDEN |
762 | return default_external_stack_protect_fail (); | |
763 | #else | |
7d69de61 RH |
764 | tree t = stack_chk_fail_decl; |
765 | ||
7ce918c5 JJ |
766 | if (!flag_pic) |
767 | return default_external_stack_protect_fail (); | |
768 | ||
769 | if (t == NULL_TREE) | |
7d69de61 RH |
770 | { |
771 | t = build_function_type_list (void_type_node, NULL_TREE); | |
c2255bc4 | 772 | t = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL, |
7d69de61 RH |
773 | get_identifier ("__stack_chk_fail_local"), t); |
774 | TREE_STATIC (t) = 1; | |
775 | TREE_PUBLIC (t) = 1; | |
776 | DECL_EXTERNAL (t) = 1; | |
777 | TREE_USED (t) = 1; | |
778 | TREE_THIS_VOLATILE (t) = 1; | |
779 | TREE_NOTHROW (t) = 1; | |
780 | DECL_ARTIFICIAL (t) = 1; | |
781 | DECL_IGNORED_P (t) = 1; | |
782 | DECL_VISIBILITY_SPECIFIED (t) = 1; | |
783 | DECL_VISIBILITY (t) = VISIBILITY_HIDDEN; | |
784 | ||
785 | stack_chk_fail_decl = t; | |
786 | } | |
787 | ||
5039610b | 788 | return build_call_expr (t, 0); |
7ce918c5 | 789 | #endif |
7d69de61 RH |
790 | } |
791 | ||
8ddf681a | 792 | bool |
3101faab KG |
793 | hook_bool_const_rtx_commutative_p (const_rtx x, |
794 | int outer_code ATTRIBUTE_UNUSED) | |
8ddf681a R |
795 | { |
796 | return COMMUTATIVE_P (x); | |
797 | } | |
798 | ||
1d636cc6 | 799 | rtx |
586de218 KG |
800 | default_function_value (const_tree ret_type ATTRIBUTE_UNUSED, |
801 | const_tree fn_decl_or_type, | |
1d636cc6 RG |
802 | bool outgoing ATTRIBUTE_UNUSED) |
803 | { | |
804 | /* The old interface doesn't handle receiving the function type. */ | |
805 | if (fn_decl_or_type | |
806 | && !DECL_P (fn_decl_or_type)) | |
807 | fn_decl_or_type = NULL; | |
808 | ||
1d636cc6 RG |
809 | #ifdef FUNCTION_VALUE |
810 | return FUNCTION_VALUE (ret_type, fn_decl_or_type); | |
811 | #else | |
7fc6a96b | 812 | gcc_unreachable (); |
1d636cc6 RG |
813 | #endif |
814 | } | |
815 | ||
390b17c2 | 816 | rtx |
ef4bddc2 | 817 | default_libcall_value (machine_mode mode ATTRIBUTE_UNUSED, |
7fc6a96b | 818 | const_rtx fun ATTRIBUTE_UNUSED) |
390b17c2 | 819 | { |
7fc6a96b | 820 | #ifdef LIBCALL_VALUE |
390b17c2 | 821 | return LIBCALL_VALUE (mode); |
7fc6a96b AS |
822 | #else |
823 | gcc_unreachable (); | |
824 | #endif | |
390b17c2 RE |
825 | } |
826 | ||
82f81f18 AS |
827 | /* The default hook for TARGET_FUNCTION_VALUE_REGNO_P. */ |
828 | ||
829 | bool | |
830 | default_function_value_regno_p (const unsigned int regno ATTRIBUTE_UNUSED) | |
831 | { | |
832 | #ifdef FUNCTION_VALUE_REGNO_P | |
833 | return FUNCTION_VALUE_REGNO_P (regno); | |
834 | #else | |
835 | gcc_unreachable (); | |
836 | #endif | |
837 | } | |
838 | ||
150cdc9e RH |
839 | rtx |
840 | default_internal_arg_pointer (void) | |
841 | { | |
842 | /* If the reg that the virtual arg pointer will be translated into is | |
843 | not a fixed reg or is the stack pointer, make a copy of the virtual | |
844 | arg pointer, and address parms via the copy. The frame pointer is | |
845 | considered fixed even though it is not marked as such. */ | |
846 | if ((ARG_POINTER_REGNUM == STACK_POINTER_REGNUM | |
847 | || ! (fixed_regs[ARG_POINTER_REGNUM] | |
848 | || ARG_POINTER_REGNUM == FRAME_POINTER_REGNUM))) | |
849 | return copy_to_reg (virtual_incoming_args_rtx); | |
850 | else | |
851 | return virtual_incoming_args_rtx; | |
852 | } | |
853 | ||
531ca746 | 854 | rtx |
c21df29b | 855 | default_static_chain (const_tree ARG_UNUSED (fndecl_or_type), bool incoming_p) |
531ca746 | 856 | { |
531ca746 RH |
857 | if (incoming_p) |
858 | { | |
531ca746 RH |
859 | #ifdef STATIC_CHAIN_INCOMING_REGNUM |
860 | return gen_rtx_REG (Pmode, STATIC_CHAIN_INCOMING_REGNUM); | |
861 | #endif | |
862 | } | |
863 | ||
531ca746 RH |
864 | #ifdef STATIC_CHAIN_REGNUM |
865 | return gen_rtx_REG (Pmode, STATIC_CHAIN_REGNUM); | |
866 | #endif | |
867 | ||
2b4fa409 RH |
868 | { |
869 | static bool issued_error; | |
870 | if (!issued_error) | |
871 | { | |
872 | issued_error = true; | |
873 | sorry ("nested functions not supported on this target"); | |
874 | } | |
875 | ||
876 | /* It really doesn't matter what we return here, so long at it | |
877 | doesn't cause the rest of the compiler to crash. */ | |
878 | return gen_rtx_MEM (Pmode, stack_pointer_rtx); | |
879 | } | |
531ca746 RH |
880 | } |
881 | ||
531ca746 RH |
882 | void |
883 | default_trampoline_init (rtx ARG_UNUSED (m_tramp), tree ARG_UNUSED (t_func), | |
884 | rtx ARG_UNUSED (r_chain)) | |
885 | { | |
531ca746 | 886 | sorry ("nested function trampolines not supported on this target"); |
531ca746 RH |
887 | } |
888 | ||
079e7538 NF |
889 | int |
890 | default_return_pops_args (tree fundecl ATTRIBUTE_UNUSED, | |
891 | tree funtype ATTRIBUTE_UNUSED, | |
892 | int size ATTRIBUTE_UNUSED) | |
893 | { | |
894 | return 0; | |
895 | } | |
896 | ||
a87cf97e | 897 | reg_class_t |
81f40b79 ILT |
898 | default_branch_target_register_class (void) |
899 | { | |
900 | return NO_REGS; | |
901 | } | |
902 | ||
5074a1f8 VM |
903 | reg_class_t |
904 | default_ira_change_pseudo_allocno_class (int regno ATTRIBUTE_UNUSED, | |
905 | reg_class_t cl) | |
906 | { | |
907 | return cl; | |
908 | } | |
909 | ||
55a2c322 VM |
910 | extern bool |
911 | default_lra_p (void) | |
912 | { | |
913 | return false; | |
914 | } | |
915 | ||
916 | int | |
917 | default_register_priority (int hard_regno ATTRIBUTE_UNUSED) | |
918 | { | |
919 | return 0; | |
920 | } | |
921 | ||
3b9ceb4b VM |
922 | extern bool |
923 | default_register_usage_leveling_p (void) | |
924 | { | |
925 | return false; | |
926 | } | |
927 | ||
55a2c322 VM |
928 | extern bool |
929 | default_different_addr_displacement_p (void) | |
930 | { | |
931 | return false; | |
932 | } | |
933 | ||
a87cf97e | 934 | reg_class_t |
8a99f6f9 | 935 | default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, |
a87cf97e | 936 | reg_class_t reload_class_i ATTRIBUTE_UNUSED, |
ef4bddc2 | 937 | machine_mode reload_mode ATTRIBUTE_UNUSED, |
8a99f6f9 R |
938 | secondary_reload_info *sri) |
939 | { | |
48c54229 | 940 | enum reg_class rclass = NO_REGS; |
a87cf97e | 941 | enum reg_class reload_class = (enum reg_class) reload_class_i; |
8a99f6f9 R |
942 | |
943 | if (sri->prev_sri && sri->prev_sri->t_icode != CODE_FOR_nothing) | |
944 | { | |
945 | sri->icode = sri->prev_sri->t_icode; | |
946 | return NO_REGS; | |
947 | } | |
948 | #ifdef SECONDARY_INPUT_RELOAD_CLASS | |
949 | if (in_p) | |
48c54229 | 950 | rclass = SECONDARY_INPUT_RELOAD_CLASS (reload_class, reload_mode, x); |
8a99f6f9 R |
951 | #endif |
952 | #ifdef SECONDARY_OUTPUT_RELOAD_CLASS | |
953 | if (! in_p) | |
48c54229 | 954 | rclass = SECONDARY_OUTPUT_RELOAD_CLASS (reload_class, reload_mode, x); |
8a99f6f9 | 955 | #endif |
48c54229 | 956 | if (rclass != NO_REGS) |
8a99f6f9 | 957 | { |
f9621cc4 RS |
958 | enum insn_code icode |
959 | = direct_optab_handler (in_p ? reload_in_optab : reload_out_optab, | |
960 | reload_mode); | |
8a99f6f9 R |
961 | |
962 | if (icode != CODE_FOR_nothing | |
2ef6ce06 | 963 | && !insn_operand_matches (icode, in_p, x)) |
8a99f6f9 R |
964 | icode = CODE_FOR_nothing; |
965 | else if (icode != CODE_FOR_nothing) | |
966 | { | |
967 | const char *insn_constraint, *scratch_constraint; | |
8a99f6f9 R |
968 | enum reg_class insn_class, scratch_class; |
969 | ||
970 | gcc_assert (insn_data[(int) icode].n_operands == 3); | |
971 | insn_constraint = insn_data[(int) icode].operand[!in_p].constraint; | |
972 | if (!*insn_constraint) | |
973 | insn_class = ALL_REGS; | |
974 | else | |
975 | { | |
976 | if (in_p) | |
977 | { | |
978 | gcc_assert (*insn_constraint == '='); | |
979 | insn_constraint++; | |
980 | } | |
8677664e RS |
981 | insn_class = (reg_class_for_constraint |
982 | (lookup_constraint (insn_constraint))); | |
8a99f6f9 R |
983 | gcc_assert (insn_class != NO_REGS); |
984 | } | |
985 | ||
986 | scratch_constraint = insn_data[(int) icode].operand[2].constraint; | |
11e30dd8 HPN |
987 | /* The scratch register's constraint must start with "=&", |
988 | except for an input reload, where only "=" is necessary, | |
989 | and where it might be beneficial to re-use registers from | |
990 | the input. */ | |
8a99f6f9 | 991 | gcc_assert (scratch_constraint[0] == '=' |
11e30dd8 HPN |
992 | && (in_p || scratch_constraint[1] == '&')); |
993 | scratch_constraint++; | |
994 | if (*scratch_constraint == '&') | |
995 | scratch_constraint++; | |
8677664e RS |
996 | scratch_class = (reg_class_for_constraint |
997 | (lookup_constraint (scratch_constraint))); | |
8a99f6f9 R |
998 | |
999 | if (reg_class_subset_p (reload_class, insn_class)) | |
1000 | { | |
48c54229 KG |
1001 | gcc_assert (scratch_class == rclass); |
1002 | rclass = NO_REGS; | |
8a99f6f9 R |
1003 | } |
1004 | else | |
48c54229 | 1005 | rclass = insn_class; |
8a99f6f9 R |
1006 | |
1007 | } | |
48c54229 | 1008 | if (rclass == NO_REGS) |
8a99f6f9 R |
1009 | sri->icode = icode; |
1010 | else | |
1011 | sri->t_icode = icode; | |
1012 | } | |
48c54229 | 1013 | return rclass; |
8a99f6f9 R |
1014 | } |
1015 | ||
9b580a0b RH |
1016 | /* By default, if flag_pic is true, then neither local nor global relocs |
1017 | should be placed in readonly memory. */ | |
1018 | ||
1019 | int | |
1020 | default_reloc_rw_mask (void) | |
1021 | { | |
1022 | return flag_pic ? 3 : 0; | |
1023 | } | |
1024 | ||
5234b8f5 DS |
1025 | /* By default, do no modification. */ |
1026 | tree default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED, | |
1027 | tree id) | |
1028 | { | |
1029 | return id; | |
1030 | } | |
1031 | ||
5aea1e76 UW |
1032 | /* Default to natural alignment for vector types. */ |
1033 | HOST_WIDE_INT | |
1034 | default_vector_alignment (const_tree type) | |
1035 | { | |
9439e9a1 | 1036 | return tree_to_shwi (TYPE_SIZE (type)); |
5aea1e76 UW |
1037 | } |
1038 | ||
5b900a4c | 1039 | bool |
3101faab | 1040 | default_builtin_vector_alignment_reachable (const_tree type, bool is_packed) |
5b900a4c DN |
1041 | { |
1042 | if (is_packed) | |
1043 | return false; | |
1044 | ||
1045 | /* Assuming that types whose size is > pointer-size are not guaranteed to be | |
1046 | naturally aligned. */ | |
1047 | if (tree_int_cst_compare (TYPE_SIZE (type), bitsize_int (POINTER_SIZE)) > 0) | |
1048 | return false; | |
1049 | ||
1050 | /* Assuming that types whose size is <= pointer-size | |
1051 | are naturally aligned. */ | |
1052 | return true; | |
1053 | } | |
1054 | ||
0601d0cf | 1055 | /* By default, assume that a target supports any factor of misalignment |
b8698a0f | 1056 | memory access if it supports movmisalign patten. |
0601d0cf RE |
1057 | is_packed is true if the memory access is defined in a packed struct. */ |
1058 | bool | |
ef4bddc2 | 1059 | default_builtin_support_vector_misalignment (machine_mode mode, |
0601d0cf RE |
1060 | const_tree type |
1061 | ATTRIBUTE_UNUSED, | |
1062 | int misalignment | |
1063 | ATTRIBUTE_UNUSED, | |
1064 | bool is_packed | |
1065 | ATTRIBUTE_UNUSED) | |
1066 | { | |
947131ba | 1067 | if (optab_handler (movmisalign_optab, mode) != CODE_FOR_nothing) |
0601d0cf RE |
1068 | return true; |
1069 | return false; | |
1070 | } | |
1071 | ||
26983c22 L |
1072 | /* By default, only attempt to parallelize bitwise operations, and |
1073 | possibly adds/subtracts using bit-twiddling. */ | |
1074 | ||
ef4bddc2 RS |
1075 | machine_mode |
1076 | default_preferred_simd_mode (machine_mode mode ATTRIBUTE_UNUSED) | |
26983c22 | 1077 | { |
cc4b5170 | 1078 | return word_mode; |
26983c22 L |
1079 | } |
1080 | ||
767f865f RG |
1081 | /* By default only the size derived from the preferred vector mode |
1082 | is tried. */ | |
1083 | ||
1084 | unsigned int | |
1085 | default_autovectorize_vector_sizes (void) | |
1086 | { | |
1087 | return 0; | |
1088 | } | |
1089 | ||
92345349 BS |
1090 | /* By default, the cost model accumulates three separate costs (prologue, |
1091 | loop body, and epilogue) for a vectorized loop or block. So allocate an | |
1092 | array of three unsigned ints, set it to zero, and return its address. */ | |
c3e7ee41 BS |
1093 | |
1094 | void * | |
1095 | default_init_cost (struct loop *loop_info ATTRIBUTE_UNUSED) | |
1096 | { | |
92345349 BS |
1097 | unsigned *cost = XNEWVEC (unsigned, 3); |
1098 | cost[vect_prologue] = cost[vect_body] = cost[vect_epilogue] = 0; | |
c3e7ee41 BS |
1099 | return cost; |
1100 | } | |
1101 | ||
1102 | /* By default, the cost model looks up the cost of the given statement | |
1103 | kind and mode, multiplies it by the occurrence count, accumulates | |
92345349 | 1104 | it into the cost specified by WHERE, and returns the cost added. */ |
c3e7ee41 BS |
1105 | |
1106 | unsigned | |
1107 | default_add_stmt_cost (void *data, int count, enum vect_cost_for_stmt kind, | |
92345349 BS |
1108 | struct _stmt_vec_info *stmt_info, int misalign, |
1109 | enum vect_cost_model_location where) | |
c3e7ee41 BS |
1110 | { |
1111 | unsigned *cost = (unsigned *) data; | |
1112 | unsigned retval = 0; | |
1113 | ||
d6d11272 | 1114 | tree vectype = stmt_info ? stmt_vectype (stmt_info) : NULL_TREE; |
58e5400a BM |
1115 | int stmt_cost = targetm.vectorize.builtin_vectorization_cost (kind, vectype, |
1116 | misalign); | |
d6d11272 XDL |
1117 | /* Statements in an inner loop relative to the loop being |
1118 | vectorized are weighted more heavily. The value here is | |
1119 | arbitrary and could potentially be improved with analysis. */ | |
1120 | if (where == vect_body && stmt_info && stmt_in_inner_loop_p (stmt_info)) | |
1121 | count *= 50; /* FIXME. */ | |
1122 | ||
1123 | retval = (unsigned) (count * stmt_cost); | |
1124 | cost[where] += retval; | |
c3e7ee41 BS |
1125 | |
1126 | return retval; | |
1127 | } | |
1128 | ||
92345349 | 1129 | /* By default, the cost model just returns the accumulated costs. */ |
c3e7ee41 | 1130 | |
92345349 BS |
1131 | void |
1132 | default_finish_cost (void *data, unsigned *prologue_cost, | |
1133 | unsigned *body_cost, unsigned *epilogue_cost) | |
c3e7ee41 | 1134 | { |
92345349 BS |
1135 | unsigned *cost = (unsigned *) data; |
1136 | *prologue_cost = cost[vect_prologue]; | |
1137 | *body_cost = cost[vect_body]; | |
1138 | *epilogue_cost = cost[vect_epilogue]; | |
c3e7ee41 BS |
1139 | } |
1140 | ||
1141 | /* Free the cost data. */ | |
1142 | ||
1143 | void | |
1144 | default_destroy_cost_data (void *data) | |
1145 | { | |
1146 | free (data); | |
1147 | } | |
1148 | ||
d4ebfa65 BE |
1149 | /* Determine whether or not a pointer mode is valid. Assume defaults |
1150 | of ptr_mode or Pmode - can be overridden. */ | |
1151 | bool | |
ef4bddc2 | 1152 | default_valid_pointer_mode (machine_mode mode) |
d4ebfa65 BE |
1153 | { |
1154 | return (mode == ptr_mode || mode == Pmode); | |
1155 | } | |
1156 | ||
7352c013 RG |
1157 | /* Determine whether the memory reference specified by REF may alias |
1158 | the C libraries errno location. */ | |
1159 | bool | |
1160 | default_ref_may_alias_errno (ao_ref *ref) | |
1161 | { | |
1162 | tree base = ao_ref_base (ref); | |
1163 | /* The default implementation assumes the errno location is | |
1164 | a declaration of type int or is always accessed via a | |
1165 | pointer to int. We assume that accesses to errno are | |
1166 | not deliberately obfuscated (even in conforming ways). */ | |
1167 | if (TYPE_UNSIGNED (TREE_TYPE (base)) | |
1168 | || TYPE_MODE (TREE_TYPE (base)) != TYPE_MODE (integer_type_node)) | |
1169 | return false; | |
1170 | /* The default implementation assumes an errno location | |
1171 | declaration is never defined in the current compilation unit. */ | |
1172 | if (DECL_P (base) | |
1173 | && !TREE_STATIC (base)) | |
1174 | return true; | |
1175 | else if (TREE_CODE (base) == MEM_REF | |
1176 | && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME) | |
1177 | { | |
1178 | struct ptr_info_def *pi = SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)); | |
1179 | return !pi || pi->pt.anything || pi->pt.nonlocal; | |
1180 | } | |
1181 | return false; | |
1182 | } | |
1183 | ||
d4ebfa65 BE |
1184 | /* Return the mode for a pointer to a given ADDRSPACE, defaulting to ptr_mode |
1185 | for the generic address space only. */ | |
1186 | ||
ef4bddc2 | 1187 | machine_mode |
d4ebfa65 BE |
1188 | default_addr_space_pointer_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) |
1189 | { | |
1190 | gcc_assert (ADDR_SPACE_GENERIC_P (addrspace)); | |
1191 | return ptr_mode; | |
1192 | } | |
1193 | ||
1194 | /* Return the mode for an address in a given ADDRSPACE, defaulting to Pmode | |
1195 | for the generic address space only. */ | |
1196 | ||
ef4bddc2 | 1197 | machine_mode |
d4ebfa65 BE |
1198 | default_addr_space_address_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) |
1199 | { | |
1200 | gcc_assert (ADDR_SPACE_GENERIC_P (addrspace)); | |
1201 | return Pmode; | |
1202 | } | |
1203 | ||
1204 | /* Named address space version of valid_pointer_mode. */ | |
1205 | ||
1206 | bool | |
ef4bddc2 | 1207 | default_addr_space_valid_pointer_mode (machine_mode mode, addr_space_t as) |
d4ebfa65 BE |
1208 | { |
1209 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1210 | return (mode == targetm.addr_space.pointer_mode (as) | |
1211 | || mode == targetm.addr_space.address_mode (as)); | |
1212 | ||
1213 | return targetm.valid_pointer_mode (mode); | |
1214 | } | |
1215 | ||
1216 | /* Some places still assume that all pointer or address modes are the | |
1217 | standard Pmode and ptr_mode. These optimizations become invalid if | |
1218 | the target actually supports multiple different modes. For now, | |
1219 | we disable such optimizations on such targets, using this function. */ | |
1220 | ||
1221 | bool | |
1222 | target_default_pointer_address_modes_p (void) | |
1223 | { | |
1224 | if (targetm.addr_space.address_mode != default_addr_space_address_mode) | |
1225 | return false; | |
1226 | if (targetm.addr_space.pointer_mode != default_addr_space_pointer_mode) | |
1227 | return false; | |
1228 | ||
1229 | return true; | |
1230 | } | |
1231 | ||
09e881c9 BE |
1232 | /* Named address space version of legitimate_address_p. */ |
1233 | ||
1234 | bool | |
ef4bddc2 | 1235 | default_addr_space_legitimate_address_p (machine_mode mode, rtx mem, |
09e881c9 BE |
1236 | bool strict, addr_space_t as) |
1237 | { | |
1238 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1239 | gcc_unreachable (); | |
1240 | ||
1241 | return targetm.legitimate_address_p (mode, mem, strict); | |
1242 | } | |
1243 | ||
1244 | /* Named address space version of LEGITIMIZE_ADDRESS. */ | |
1245 | ||
1246 | rtx | |
1247 | default_addr_space_legitimize_address (rtx x, rtx oldx, | |
ef4bddc2 | 1248 | machine_mode mode, addr_space_t as) |
09e881c9 BE |
1249 | { |
1250 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1251 | return x; | |
1252 | ||
1253 | return targetm.legitimize_address (x, oldx, mode); | |
1254 | } | |
1255 | ||
1256 | /* The default hook for determining if one named address space is a subset of | |
1257 | another and to return which address space to use as the common address | |
1258 | space. */ | |
1259 | ||
1260 | bool | |
1261 | default_addr_space_subset_p (addr_space_t subset, addr_space_t superset) | |
1262 | { | |
1263 | return (subset == superset); | |
1264 | } | |
1265 | ||
1266 | /* The default hook for TARGET_ADDR_SPACE_CONVERT. This hook should never be | |
1267 | called for targets with only a generic address space. */ | |
1268 | ||
1269 | rtx | |
1270 | default_addr_space_convert (rtx op ATTRIBUTE_UNUSED, | |
1271 | tree from_type ATTRIBUTE_UNUSED, | |
1272 | tree to_type ATTRIBUTE_UNUSED) | |
1273 | { | |
1274 | gcc_unreachable (); | |
1275 | } | |
1276 | ||
dbc42c44 AS |
1277 | bool |
1278 | default_hard_regno_scratch_ok (unsigned int regno ATTRIBUTE_UNUSED) | |
1279 | { | |
1280 | return true; | |
1281 | } | |
1282 | ||
cbda7dc6 AS |
1283 | /* The default implementation of TARGET_MODE_DEPENDENT_ADDRESS_P. */ |
1284 | ||
1285 | bool | |
5bfed9a9 GJL |
1286 | default_mode_dependent_address_p (const_rtx addr ATTRIBUTE_UNUSED, |
1287 | addr_space_t addrspace ATTRIBUTE_UNUSED) | |
cbda7dc6 | 1288 | { |
cbda7dc6 | 1289 | return false; |
cbda7dc6 AS |
1290 | } |
1291 | ||
ab442df7 MM |
1292 | bool |
1293 | default_target_option_valid_attribute_p (tree ARG_UNUSED (fndecl), | |
1294 | tree ARG_UNUSED (name), | |
1295 | tree ARG_UNUSED (args), | |
1296 | int ARG_UNUSED (flags)) | |
1297 | { | |
5779e713 MM |
1298 | warning (OPT_Wattributes, |
1299 | "target attribute is not supported on this machine"); | |
1300 | ||
1301 | return false; | |
1302 | } | |
1303 | ||
1304 | bool | |
1305 | default_target_option_pragma_parse (tree ARG_UNUSED (args), | |
1306 | tree ARG_UNUSED (pop_target)) | |
1307 | { | |
1308 | warning (OPT_Wpragmas, | |
1309 | "#pragma GCC target is not supported for this machine"); | |
1310 | ||
ab442df7 MM |
1311 | return false; |
1312 | } | |
1313 | ||
1314 | bool | |
5cec9f59 | 1315 | default_target_can_inline_p (tree caller, tree callee) |
ab442df7 MM |
1316 | { |
1317 | bool ret = false; | |
1318 | tree callee_opts = DECL_FUNCTION_SPECIFIC_TARGET (callee); | |
1319 | tree caller_opts = DECL_FUNCTION_SPECIFIC_TARGET (caller); | |
1320 | ||
1321 | /* If callee has no option attributes, then it is ok to inline */ | |
1322 | if (!callee_opts) | |
1323 | ret = true; | |
1324 | ||
1325 | /* If caller has no option attributes, but callee does then it is not ok to | |
1326 | inline */ | |
1327 | else if (!caller_opts) | |
1328 | ret = false; | |
1329 | ||
dd5a833e MS |
1330 | /* If both caller and callee have attributes, assume that if the |
1331 | pointer is different, the two functions have different target | |
1332 | options since build_target_option_node uses a hash table for the | |
1333 | options. */ | |
ab442df7 MM |
1334 | else |
1335 | ret = (callee_opts == caller_opts); | |
1336 | ||
1337 | return ret; | |
1338 | } | |
1339 | ||
e6ff3083 AS |
1340 | /* If the machine does not have a case insn that compares the bounds, |
1341 | this means extra overhead for dispatch tables, which raises the | |
1342 | threshold for using them. */ | |
1343 | ||
0cd2402d SB |
1344 | unsigned int |
1345 | default_case_values_threshold (void) | |
e6ff3083 | 1346 | { |
8684d89d | 1347 | return (targetm.have_casesi () ? 4 : 5); |
e6ff3083 AS |
1348 | } |
1349 | ||
2929029c WG |
1350 | bool |
1351 | default_have_conditional_execution (void) | |
1352 | { | |
1353 | #ifdef HAVE_conditional_execution | |
1354 | return HAVE_conditional_execution; | |
1355 | #else | |
1356 | return false; | |
1357 | #endif | |
1358 | } | |
1359 | ||
9b2b7279 AM |
1360 | /* By default we assume that c99 functions are present at the runtime, |
1361 | but sincos is not. */ | |
1362 | bool | |
1363 | default_libc_has_function (enum function_class fn_class) | |
1364 | { | |
1365 | if (fn_class == function_c94 | |
1366 | || fn_class == function_c99_misc | |
1367 | || fn_class == function_c99_math_complex) | |
1368 | return true; | |
1369 | ||
1370 | return false; | |
1371 | } | |
1372 | ||
1373 | bool | |
1374 | gnu_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED) | |
1375 | { | |
1376 | return true; | |
1377 | } | |
1378 | ||
1379 | bool | |
1380 | no_c99_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED) | |
1381 | { | |
1382 | return false; | |
1383 | } | |
1384 | ||
0a35513e AH |
1385 | tree |
1386 | default_builtin_tm_load_store (tree ARG_UNUSED (type)) | |
1387 | { | |
1388 | return NULL_TREE; | |
1389 | } | |
1390 | ||
f5c21ef3 AS |
1391 | /* Compute cost of moving registers to/from memory. */ |
1392 | ||
1393 | int | |
ef4bddc2 | 1394 | default_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
a87cf97e | 1395 | reg_class_t rclass ATTRIBUTE_UNUSED, |
f5c21ef3 AS |
1396 | bool in ATTRIBUTE_UNUSED) |
1397 | { | |
1398 | #ifndef MEMORY_MOVE_COST | |
a87cf97e | 1399 | return (4 + memory_move_secondary_cost (mode, (enum reg_class) rclass, in)); |
f5c21ef3 | 1400 | #else |
a87cf97e | 1401 | return MEMORY_MOVE_COST (mode, (enum reg_class) rclass, in); |
f5c21ef3 AS |
1402 | #endif |
1403 | } | |
1404 | ||
de8f4b07 AS |
1405 | /* Compute cost of moving data from a register of class FROM to one of |
1406 | TO, using MODE. */ | |
1407 | ||
1408 | int | |
ef4bddc2 | 1409 | default_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
a87cf97e JR |
1410 | reg_class_t from ATTRIBUTE_UNUSED, |
1411 | reg_class_t to ATTRIBUTE_UNUSED) | |
de8f4b07 AS |
1412 | { |
1413 | #ifndef REGISTER_MOVE_COST | |
1414 | return 2; | |
1415 | #else | |
a87cf97e | 1416 | return REGISTER_MOVE_COST (mode, (enum reg_class) from, (enum reg_class) to); |
de8f4b07 AS |
1417 | #endif |
1418 | } | |
1419 | ||
7cbed008 JG |
1420 | /* For hooks which use the MOVE_RATIO macro, this gives the legacy default |
1421 | behaviour. SPEED_P is true if we are compiling for speed. */ | |
1422 | ||
5a6bc9c7 | 1423 | unsigned int |
7cbed008 JG |
1424 | get_move_ratio (bool speed_p ATTRIBUTE_UNUSED) |
1425 | { | |
1426 | unsigned int move_ratio; | |
1427 | #ifdef MOVE_RATIO | |
1428 | move_ratio = (unsigned int) MOVE_RATIO (speed_p); | |
1429 | #else | |
1430 | #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti) | |
1431 | move_ratio = 2; | |
1432 | #else /* No movmem patterns, pick a default. */ | |
1433 | move_ratio = ((speed_p) ? 15 : 3); | |
1434 | #endif | |
1435 | #endif | |
1436 | return move_ratio; | |
1437 | } | |
1438 | ||
1439 | /* Return TRUE if the move_by_pieces/set_by_pieces infrastructure should be | |
1440 | used; return FALSE if the movmem/setmem optab should be expanded, or | |
1441 | a call to memcpy emitted. */ | |
1442 | ||
1443 | bool | |
445d7826 | 1444 | default_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size, |
7cbed008 JG |
1445 | unsigned int alignment, |
1446 | enum by_pieces_operation op, | |
1447 | bool speed_p) | |
1448 | { | |
1449 | unsigned int max_size = 0; | |
1450 | unsigned int ratio = 0; | |
1451 | ||
1452 | switch (op) | |
1453 | { | |
1454 | case CLEAR_BY_PIECES: | |
1455 | max_size = STORE_MAX_PIECES; | |
1456 | ratio = CLEAR_RATIO (speed_p); | |
1457 | break; | |
1458 | case MOVE_BY_PIECES: | |
1459 | max_size = MOVE_MAX_PIECES; | |
1460 | ratio = get_move_ratio (speed_p); | |
1461 | break; | |
1462 | case SET_BY_PIECES: | |
1463 | max_size = STORE_MAX_PIECES; | |
1464 | ratio = SET_RATIO (speed_p); | |
1465 | break; | |
1466 | case STORE_BY_PIECES: | |
1467 | max_size = STORE_MAX_PIECES; | |
1468 | ratio = get_move_ratio (speed_p); | |
1469 | break; | |
1470 | } | |
1471 | ||
1472 | return move_by_pieces_ninsns (size, alignment, max_size + 1) < ratio; | |
1473 | } | |
1474 | ||
3c5273a9 KT |
1475 | bool |
1476 | default_profile_before_prologue (void) | |
1477 | { | |
1478 | #ifdef PROFILE_BEFORE_PROLOGUE | |
1479 | return true; | |
1480 | #else | |
1481 | return false; | |
1482 | #endif | |
1483 | } | |
1484 | ||
fba42e24 AS |
1485 | /* The default implementation of TARGET_PREFERRED_RELOAD_CLASS. */ |
1486 | ||
1487 | reg_class_t | |
1488 | default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, | |
1489 | reg_class_t rclass) | |
1490 | { | |
1491 | #ifdef PREFERRED_RELOAD_CLASS | |
1492 | return (reg_class_t) PREFERRED_RELOAD_CLASS (x, (enum reg_class) rclass); | |
1493 | #else | |
1494 | return rclass; | |
1495 | #endif | |
1496 | } | |
1497 | ||
abd26bfb AS |
1498 | /* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS. */ |
1499 | ||
1500 | reg_class_t | |
1501 | default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
1502 | reg_class_t rclass) | |
1503 | { | |
abd26bfb | 1504 | return rclass; |
abd26bfb AS |
1505 | } |
1506 | ||
5f286f4a YQ |
1507 | /* The default implementation of TARGET_PREFERRED_RENAME_CLASS. */ |
1508 | reg_class_t | |
1509 | default_preferred_rename_class (reg_class_t rclass ATTRIBUTE_UNUSED) | |
1510 | { | |
1511 | return NO_REGS; | |
1512 | } | |
1513 | ||
07b8f0a8 AS |
1514 | /* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P. */ |
1515 | ||
1516 | bool | |
1517 | default_class_likely_spilled_p (reg_class_t rclass) | |
1518 | { | |
07b8f0a8 | 1519 | return (reg_class_size[(int) rclass] == 1); |
07b8f0a8 AS |
1520 | } |
1521 | ||
a8c44c52 AS |
1522 | /* The default implementation of TARGET_CLASS_MAX_NREGS. */ |
1523 | ||
1524 | unsigned char | |
1525 | default_class_max_nregs (reg_class_t rclass ATTRIBUTE_UNUSED, | |
ef4bddc2 | 1526 | machine_mode mode ATTRIBUTE_UNUSED) |
a8c44c52 AS |
1527 | { |
1528 | #ifdef CLASS_MAX_NREGS | |
1529 | return (unsigned char) CLASS_MAX_NREGS ((enum reg_class) rclass, mode); | |
1530 | #else | |
1531 | return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD); | |
1532 | #endif | |
1533 | } | |
1534 | ||
f0a0390e RH |
1535 | /* Determine the debugging unwind mechanism for the target. */ |
1536 | ||
1537 | enum unwind_info_type | |
1538 | default_debug_unwind_info (void) | |
1539 | { | |
1540 | /* If the target wants to force the use of dwarf2 unwind info, let it. */ | |
1541 | /* ??? Change all users to the hook, then poison this. */ | |
1542 | #ifdef DWARF2_FRAME_INFO | |
1543 | if (DWARF2_FRAME_INFO) | |
1544 | return UI_DWARF2; | |
1545 | #endif | |
1546 | ||
1547 | /* Otherwise, only turn it on if dwarf2 debugging is enabled. */ | |
1548 | #ifdef DWARF2_DEBUGGING_INFO | |
1549 | if (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) | |
1550 | return UI_DWARF2; | |
1551 | #endif | |
1552 | ||
1553 | return UI_NONE; | |
1554 | } | |
1555 | ||
ff050c66 MF |
1556 | /* Determine the correct mode for a Dwarf frame register that represents |
1557 | register REGNO. */ | |
1558 | ||
ef4bddc2 | 1559 | machine_mode |
ff050c66 MF |
1560 | default_dwarf_frame_reg_mode (int regno) |
1561 | { | |
ef4bddc2 | 1562 | machine_mode save_mode = reg_raw_mode[regno]; |
ff050c66 MF |
1563 | |
1564 | if (HARD_REGNO_CALL_PART_CLOBBERED (regno, save_mode)) | |
1565 | save_mode = choose_hard_reg_mode (regno, 1, true); | |
1566 | return save_mode; | |
1567 | } | |
1568 | ||
ffa88471 SE |
1569 | /* To be used by targets where reg_raw_mode doesn't return the right |
1570 | mode for registers used in apply_builtin_return and apply_builtin_arg. */ | |
1571 | ||
ef4bddc2 | 1572 | machine_mode |
c3284718 | 1573 | default_get_reg_raw_mode (int regno) |
ffa88471 SE |
1574 | { |
1575 | return reg_raw_mode[regno]; | |
1576 | } | |
1577 | ||
d56a43a0 AK |
1578 | /* Return true if a leaf function should stay leaf even with profiling |
1579 | enabled. */ | |
1580 | ||
1581 | bool | |
1582 | default_keep_leaf_when_profiled () | |
1583 | { | |
1584 | return false; | |
1585 | } | |
1586 | ||
a803773f JM |
1587 | /* Return true if the state of option OPTION should be stored in PCH files |
1588 | and checked by default_pch_valid_p. Store the option's current state | |
1589 | in STATE if so. */ | |
1590 | ||
1591 | static inline bool | |
1592 | option_affects_pch_p (int option, struct cl_option_state *state) | |
1593 | { | |
1594 | if ((cl_options[option].flags & CL_TARGET) == 0) | |
1595 | return false; | |
212bfe71 JR |
1596 | if ((cl_options[option].flags & CL_PCH_IGNORE) != 0) |
1597 | return false; | |
a803773f JM |
1598 | if (option_flag_var (option, &global_options) == &target_flags) |
1599 | if (targetm.check_pch_target_flags) | |
1600 | return false; | |
1601 | return get_option_state (&global_options, option, state); | |
1602 | } | |
1603 | ||
1604 | /* Default version of get_pch_validity. | |
1605 | By default, every flag difference is fatal; that will be mostly right for | |
1606 | most targets, but completely right for very few. */ | |
1607 | ||
1608 | void * | |
1609 | default_get_pch_validity (size_t *sz) | |
1610 | { | |
1611 | struct cl_option_state state; | |
1612 | size_t i; | |
1613 | char *result, *r; | |
1614 | ||
1615 | *sz = 2; | |
1616 | if (targetm.check_pch_target_flags) | |
1617 | *sz += sizeof (target_flags); | |
1618 | for (i = 0; i < cl_options_count; i++) | |
1619 | if (option_affects_pch_p (i, &state)) | |
1620 | *sz += state.size; | |
1621 | ||
1622 | result = r = XNEWVEC (char, *sz); | |
1623 | r[0] = flag_pic; | |
1624 | r[1] = flag_pie; | |
1625 | r += 2; | |
1626 | if (targetm.check_pch_target_flags) | |
1627 | { | |
1628 | memcpy (r, &target_flags, sizeof (target_flags)); | |
1629 | r += sizeof (target_flags); | |
1630 | } | |
1631 | ||
1632 | for (i = 0; i < cl_options_count; i++) | |
1633 | if (option_affects_pch_p (i, &state)) | |
1634 | { | |
1635 | memcpy (r, state.data, state.size); | |
1636 | r += state.size; | |
1637 | } | |
1638 | ||
1639 | return result; | |
1640 | } | |
1641 | ||
1642 | /* Return a message which says that a PCH file was created with a different | |
1643 | setting of OPTION. */ | |
1644 | ||
1645 | static const char * | |
1646 | pch_option_mismatch (const char *option) | |
1647 | { | |
582f770b UB |
1648 | return xasprintf (_("created and used with differing settings of '%s'"), |
1649 | option); | |
a803773f JM |
1650 | } |
1651 | ||
1652 | /* Default version of pch_valid_p. */ | |
1653 | ||
1654 | const char * | |
1655 | default_pch_valid_p (const void *data_p, size_t len) | |
1656 | { | |
1657 | struct cl_option_state state; | |
1658 | const char *data = (const char *)data_p; | |
1659 | size_t i; | |
1660 | ||
1661 | /* -fpic and -fpie also usually make a PCH invalid. */ | |
1662 | if (data[0] != flag_pic) | |
1663 | return _("created and used with different settings of -fpic"); | |
1664 | if (data[1] != flag_pie) | |
1665 | return _("created and used with different settings of -fpie"); | |
1666 | data += 2; | |
1667 | ||
1668 | /* Check target_flags. */ | |
1669 | if (targetm.check_pch_target_flags) | |
1670 | { | |
1671 | int tf; | |
1672 | const char *r; | |
1673 | ||
1674 | memcpy (&tf, data, sizeof (target_flags)); | |
1675 | data += sizeof (target_flags); | |
1676 | len -= sizeof (target_flags); | |
1677 | r = targetm.check_pch_target_flags (tf); | |
1678 | if (r != NULL) | |
1679 | return r; | |
1680 | } | |
1681 | ||
1682 | for (i = 0; i < cl_options_count; i++) | |
1683 | if (option_affects_pch_p (i, &state)) | |
1684 | { | |
1685 | if (memcmp (data, state.data, state.size) != 0) | |
1686 | return pch_option_mismatch (cl_options[i].opt_text); | |
1687 | data += state.size; | |
1688 | len -= state.size; | |
1689 | } | |
1690 | ||
1691 | return NULL; | |
1692 | } | |
1693 | ||
42e37616 DM |
1694 | /* Default version of cstore_mode. */ |
1695 | ||
ef4bddc2 | 1696 | machine_mode |
42e37616 DM |
1697 | default_cstore_mode (enum insn_code icode) |
1698 | { | |
1699 | return insn_data[(int) icode].operand[0].mode; | |
1700 | } | |
1701 | ||
d9886a9e L |
1702 | /* Default version of member_type_forces_blk. */ |
1703 | ||
1704 | bool | |
ef4bddc2 | 1705 | default_member_type_forces_blk (const_tree, machine_mode) |
d9886a9e L |
1706 | { |
1707 | return false; | |
1708 | } | |
1709 | ||
d5e254e1 IE |
1710 | rtx |
1711 | default_load_bounds_for_arg (rtx addr ATTRIBUTE_UNUSED, | |
1712 | rtx ptr ATTRIBUTE_UNUSED, | |
1713 | rtx bnd ATTRIBUTE_UNUSED) | |
1714 | { | |
1715 | gcc_unreachable (); | |
1716 | } | |
1717 | ||
1718 | void | |
1719 | default_store_bounds_for_arg (rtx val ATTRIBUTE_UNUSED, | |
1720 | rtx addr ATTRIBUTE_UNUSED, | |
1721 | rtx bounds ATTRIBUTE_UNUSED, | |
1722 | rtx to ATTRIBUTE_UNUSED) | |
1723 | { | |
1724 | gcc_unreachable (); | |
1725 | } | |
1726 | ||
1727 | rtx | |
1728 | default_load_returned_bounds (rtx slot ATTRIBUTE_UNUSED) | |
1729 | { | |
1730 | gcc_unreachable (); | |
1731 | } | |
1732 | ||
1733 | void | |
1734 | default_store_returned_bounds (rtx slot ATTRIBUTE_UNUSED, | |
1735 | rtx bounds ATTRIBUTE_UNUSED) | |
1736 | { | |
1737 | gcc_unreachable (); | |
1738 | } | |
1739 | ||
f236ac95 RB |
1740 | /* Default version of canonicalize_comparison. */ |
1741 | ||
1742 | void | |
1743 | default_canonicalize_comparison (int *, rtx *, rtx *, bool) | |
1744 | { | |
1745 | } | |
1746 | ||
267bac10 JM |
1747 | /* Default implementation of TARGET_ATOMIC_ASSIGN_EXPAND_FENV. */ |
1748 | ||
1749 | void | |
1750 | default_atomic_assign_expand_fenv (tree *, tree *, tree *) | |
1751 | { | |
1752 | } | |
1753 | ||
4a7cb16f AM |
1754 | #ifndef PAD_VARARGS_DOWN |
1755 | #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN | |
1756 | #endif | |
1757 | ||
1758 | /* Build an indirect-ref expression over the given TREE, which represents a | |
1759 | piece of a va_arg() expansion. */ | |
1760 | tree | |
1761 | build_va_arg_indirect_ref (tree addr) | |
1762 | { | |
1763 | addr = build_simple_mem_ref_loc (EXPR_LOCATION (addr), addr); | |
4a7cb16f AM |
1764 | return addr; |
1765 | } | |
1766 | ||
1767 | /* The "standard" implementation of va_arg: read the value from the | |
1768 | current (padded) address and increment by the (padded) size. */ | |
1769 | ||
1770 | tree | |
1771 | std_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, | |
1772 | gimple_seq *post_p) | |
1773 | { | |
1774 | tree addr, t, type_size, rounded_size, valist_tmp; | |
1775 | unsigned HOST_WIDE_INT align, boundary; | |
1776 | bool indirect; | |
1777 | ||
4a7cb16f AM |
1778 | /* All of the alignment and movement below is for args-grow-up machines. |
1779 | As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all | |
1780 | implement their own specialized gimplify_va_arg_expr routines. */ | |
6dad9361 TS |
1781 | if (ARGS_GROW_DOWNWARD) |
1782 | gcc_unreachable (); | |
4a7cb16f AM |
1783 | |
1784 | indirect = pass_by_reference (NULL, TYPE_MODE (type), type, false); | |
1785 | if (indirect) | |
1786 | type = build_pointer_type (type); | |
1787 | ||
1788 | align = PARM_BOUNDARY / BITS_PER_UNIT; | |
1789 | boundary = targetm.calls.function_arg_boundary (TYPE_MODE (type), type); | |
1790 | ||
1791 | /* When we align parameter on stack for caller, if the parameter | |
1792 | alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be | |
1793 | aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee | |
1794 | here with caller. */ | |
1795 | if (boundary > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1796 | boundary = MAX_SUPPORTED_STACK_ALIGNMENT; | |
1797 | ||
1798 | boundary /= BITS_PER_UNIT; | |
1799 | ||
1800 | /* Hoist the valist value into a temporary for the moment. */ | |
1801 | valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL); | |
1802 | ||
1803 | /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually | |
1804 | requires greater alignment, we must perform dynamic alignment. */ | |
1805 | if (boundary > align | |
1806 | && !integer_zerop (TYPE_SIZE (type))) | |
1807 | { | |
1808 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, | |
1809 | fold_build_pointer_plus_hwi (valist_tmp, boundary - 1)); | |
1810 | gimplify_and_add (t, pre_p); | |
1811 | ||
1812 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, | |
1813 | fold_build2 (BIT_AND_EXPR, TREE_TYPE (valist), | |
1814 | valist_tmp, | |
1815 | build_int_cst (TREE_TYPE (valist), -boundary))); | |
1816 | gimplify_and_add (t, pre_p); | |
1817 | } | |
1818 | else | |
1819 | boundary = align; | |
1820 | ||
1821 | /* If the actual alignment is less than the alignment of the type, | |
1822 | adjust the type accordingly so that we don't assume strict alignment | |
1823 | when dereferencing the pointer. */ | |
1824 | boundary *= BITS_PER_UNIT; | |
1825 | if (boundary < TYPE_ALIGN (type)) | |
1826 | { | |
1827 | type = build_variant_type_copy (type); | |
1828 | TYPE_ALIGN (type) = boundary; | |
1829 | } | |
1830 | ||
1831 | /* Compute the rounded size of the type. */ | |
1832 | type_size = size_in_bytes (type); | |
1833 | rounded_size = round_up (type_size, align); | |
1834 | ||
1835 | /* Reduce rounded_size so it's sharable with the postqueue. */ | |
1836 | gimplify_expr (&rounded_size, pre_p, post_p, is_gimple_val, fb_rvalue); | |
1837 | ||
1838 | /* Get AP. */ | |
1839 | addr = valist_tmp; | |
1840 | if (PAD_VARARGS_DOWN && !integer_zerop (rounded_size)) | |
1841 | { | |
1842 | /* Small args are padded downward. */ | |
1843 | t = fold_build2_loc (input_location, GT_EXPR, sizetype, | |
1844 | rounded_size, size_int (align)); | |
1845 | t = fold_build3 (COND_EXPR, sizetype, t, size_zero_node, | |
1846 | size_binop (MINUS_EXPR, rounded_size, type_size)); | |
1847 | addr = fold_build_pointer_plus (addr, t); | |
1848 | } | |
1849 | ||
1850 | /* Compute new value for AP. */ | |
1851 | t = fold_build_pointer_plus (valist_tmp, rounded_size); | |
1852 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist, t); | |
1853 | gimplify_and_add (t, pre_p); | |
1854 | ||
1855 | addr = fold_convert (build_pointer_type (type), addr); | |
1856 | ||
1857 | if (indirect) | |
1858 | addr = build_va_arg_indirect_ref (addr); | |
1859 | ||
1860 | return build_va_arg_indirect_ref (addr); | |
1861 | } | |
1862 | ||
d5e254e1 IE |
1863 | tree |
1864 | default_chkp_bound_type (void) | |
1865 | { | |
1866 | tree res = make_node (POINTER_BOUNDS_TYPE); | |
1867 | TYPE_PRECISION (res) = TYPE_PRECISION (size_type_node) * 2; | |
1868 | TYPE_NAME (res) = get_identifier ("__bounds_type"); | |
1869 | SET_TYPE_MODE (res, targetm.chkp_bound_mode ()); | |
1870 | layout_type (res); | |
1871 | return res; | |
1872 | } | |
1873 | ||
1874 | enum machine_mode | |
1875 | default_chkp_bound_mode (void) | |
1876 | { | |
1877 | return VOIDmode; | |
1878 | } | |
1879 | ||
1880 | tree | |
1881 | default_builtin_chkp_function (unsigned int fcode ATTRIBUTE_UNUSED) | |
1882 | { | |
1883 | return NULL_TREE; | |
1884 | } | |
1885 | ||
1886 | rtx | |
1887 | default_chkp_function_value_bounds (const_tree ret_type ATTRIBUTE_UNUSED, | |
1888 | const_tree fn_decl_or_type ATTRIBUTE_UNUSED, | |
1889 | bool outgoing ATTRIBUTE_UNUSED) | |
1890 | { | |
1891 | gcc_unreachable (); | |
1892 | } | |
1893 | ||
1894 | tree | |
1895 | default_chkp_make_bounds_constant (HOST_WIDE_INT lb ATTRIBUTE_UNUSED, | |
1896 | HOST_WIDE_INT ub ATTRIBUTE_UNUSED) | |
1897 | { | |
1898 | return NULL_TREE; | |
1899 | } | |
1900 | ||
1901 | int | |
1902 | default_chkp_initialize_bounds (tree var ATTRIBUTE_UNUSED, | |
1903 | tree lb ATTRIBUTE_UNUSED, | |
1904 | tree ub ATTRIBUTE_UNUSED, | |
1905 | tree *stmts ATTRIBUTE_UNUSED) | |
1906 | { | |
1907 | return 0; | |
1908 | } | |
1909 | ||
1910 | void | |
1911 | default_setup_incoming_vararg_bounds (cumulative_args_t ca ATTRIBUTE_UNUSED, | |
1912 | enum machine_mode mode ATTRIBUTE_UNUSED, | |
1913 | tree type ATTRIBUTE_UNUSED, | |
1914 | int *pretend_arg_size ATTRIBUTE_UNUSED, | |
1915 | int second_time ATTRIBUTE_UNUSED) | |
1916 | { | |
1917 | } | |
1918 | ||
1d0216c8 RS |
1919 | /* An implementation of TARGET_CAN_USE_DOLOOP_P for targets that do |
1920 | not support nested low-overhead loops. */ | |
1921 | ||
1922 | bool | |
807e902e | 1923 | can_use_doloop_if_innermost (const widest_int &, const widest_int &, |
1d0216c8 RS |
1924 | unsigned int loop_depth, bool) |
1925 | { | |
1926 | return loop_depth == 1; | |
1927 | } | |
4a7cb16f | 1928 | |
7d69de61 | 1929 | #include "gt-targhooks.h" |