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61f71b34 | 1 | /* Default target hook functions. |
23a5b65a | 2 | Copyright (C) 2003-2014 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" | |
53 | #include "machmode.h" | |
54 | #include "rtl.h" | |
55 | #include "tree.h" | |
d8a2d370 DN |
56 | #include "stor-layout.h" |
57 | #include "varasm.h" | |
61f71b34 | 58 | #include "expr.h" |
d84a4ef1 | 59 | #include "output.h" |
718f9c0f | 60 | #include "diagnostic-core.h" |
83685514 AM |
61 | #include "hashtab.h" |
62 | #include "hash-set.h" | |
63 | #include "vec.h" | |
64 | #include "hard-reg-set.h" | |
65 | #include "input.h" | |
61f71b34 DD |
66 | #include "function.h" |
67 | #include "target.h" | |
68 | #include "tm_p.h" | |
69 | #include "target-def.h" | |
ffa88471 | 70 | #include "regs.h" |
8a99f6f9 R |
71 | #include "reload.h" |
72 | #include "optabs.h" | |
73 | #include "recog.h" | |
a803773f JM |
74 | #include "intl.h" |
75 | #include "opts.h" | |
2fb9a547 AM |
76 | #include "tree-ssa-alias.h" |
77 | #include "gimple-expr.h" | |
45b0be94 | 78 | #include "gimplify.h" |
d8a2d370 | 79 | #include "stringpool.h" |
442b4905 | 80 | #include "tree-ssanames.h" |
42e37616 | 81 | #include "insn-codes.h" |
61f71b34 | 82 | |
6dd53648 | 83 | |
c6c3dba9 PB |
84 | bool |
85 | default_legitimate_address_p (enum machine_mode mode ATTRIBUTE_UNUSED, | |
86 | rtx addr ATTRIBUTE_UNUSED, | |
87 | bool strict ATTRIBUTE_UNUSED) | |
88 | { | |
89 | #ifdef GO_IF_LEGITIMATE_ADDRESS | |
90 | /* Defer to the old implementation using a goto. */ | |
91 | if (strict) | |
92 | return strict_memory_address_p (mode, addr); | |
93 | else | |
94 | return memory_address_p (mode, addr); | |
95 | #else | |
96 | gcc_unreachable (); | |
97 | #endif | |
98 | } | |
99 | ||
6773a41c RO |
100 | void |
101 | default_external_libcall (rtx fun ATTRIBUTE_UNUSED) | |
102 | { | |
103 | #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL | |
c3284718 | 104 | ASM_OUTPUT_EXTERNAL_LIBCALL (asm_out_file, fun); |
6773a41c RO |
105 | #endif |
106 | } | |
107 | ||
215b063c PB |
108 | int |
109 | default_unspec_may_trap_p (const_rtx x, unsigned flags) | |
110 | { | |
111 | int i; | |
112 | ||
c84a808e EB |
113 | /* Any floating arithmetic may trap. */ |
114 | if ((SCALAR_FLOAT_MODE_P (GET_MODE (x)) && flag_trapping_math)) | |
215b063c PB |
115 | return 1; |
116 | ||
117 | for (i = 0; i < XVECLEN (x, 0); ++i) | |
118 | { | |
119 | if (may_trap_p_1 (XVECEXP (x, 0, i), flags)) | |
120 | return 1; | |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
cde0f3fd PB |
126 | enum machine_mode |
127 | default_promote_function_mode (const_tree type ATTRIBUTE_UNUSED, | |
128 | enum machine_mode mode, | |
129 | int *punsignedp ATTRIBUTE_UNUSED, | |
130 | const_tree funtype ATTRIBUTE_UNUSED, | |
131 | int for_return ATTRIBUTE_UNUSED) | |
132 | { | |
5e617be8 | 133 | if (type != NULL_TREE && for_return == 2) |
666e3ceb | 134 | return promote_mode (type, mode, punsignedp); |
cde0f3fd PB |
135 | return mode; |
136 | } | |
137 | ||
138 | enum machine_mode | |
139 | default_promote_function_mode_always_promote (const_tree type, | |
140 | enum machine_mode mode, | |
141 | int *punsignedp, | |
142 | const_tree funtype ATTRIBUTE_UNUSED, | |
143 | int for_return ATTRIBUTE_UNUSED) | |
144 | { | |
145 | return promote_mode (type, mode, punsignedp); | |
146 | } | |
147 | ||
e129d93a ILT |
148 | enum machine_mode |
149 | default_cc_modes_compatible (enum machine_mode m1, enum machine_mode m2) | |
150 | { | |
151 | if (m1 == m2) | |
152 | return m1; | |
153 | return VOIDmode; | |
154 | } | |
155 | ||
61f71b34 | 156 | bool |
586de218 KG |
157 | default_return_in_memory (const_tree type, |
158 | const_tree fntype ATTRIBUTE_UNUSED) | |
61f71b34 | 159 | { |
33d05111 | 160 | return (TYPE_MODE (type) == BLKmode); |
61f71b34 DD |
161 | } |
162 | ||
506d7b68 PB |
163 | rtx |
164 | default_legitimize_address (rtx x, rtx orig_x ATTRIBUTE_UNUSED, | |
165 | enum machine_mode mode ATTRIBUTE_UNUSED) | |
166 | { | |
167 | return x; | |
168 | } | |
169 | ||
61f71b34 DD |
170 | rtx |
171 | default_expand_builtin_saveregs (void) | |
172 | { | |
61f71b34 DD |
173 | error ("__builtin_saveregs not supported by this target"); |
174 | return const0_rtx; | |
61f71b34 DD |
175 | } |
176 | ||
177 | void | |
d5cc9181 | 178 | default_setup_incoming_varargs (cumulative_args_t ca ATTRIBUTE_UNUSED, |
61f71b34 DD |
179 | enum machine_mode mode ATTRIBUTE_UNUSED, |
180 | tree type ATTRIBUTE_UNUSED, | |
181 | int *pretend_arg_size ATTRIBUTE_UNUSED, | |
182 | int second_time ATTRIBUTE_UNUSED) | |
183 | { | |
61f71b34 DD |
184 | } |
185 | ||
d6da68b9 KH |
186 | /* The default implementation of TARGET_BUILTIN_SETJMP_FRAME_VALUE. */ |
187 | ||
188 | rtx | |
189 | default_builtin_setjmp_frame_value (void) | |
190 | { | |
191 | return virtual_stack_vars_rtx; | |
192 | } | |
193 | ||
3a4d587b | 194 | /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns false. */ |
8dfa8fcd | 195 | |
61f71b34 | 196 | bool |
d5cc9181 | 197 | hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t ca ATTRIBUTE_UNUSED) |
61f71b34 | 198 | { |
b602b7b6 | 199 | return false; |
61f71b34 DD |
200 | } |
201 | ||
202 | bool | |
d5cc9181 | 203 | default_pretend_outgoing_varargs_named (cumulative_args_t ca ATTRIBUTE_UNUSED) |
61f71b34 | 204 | { |
3a4d587b AM |
205 | return (targetm.calls.setup_incoming_varargs |
206 | != default_setup_incoming_varargs); | |
61f71b34 | 207 | } |
c6e8c921 | 208 | |
a1c496cb | 209 | enum machine_mode |
93f90be6 FJ |
210 | default_eh_return_filter_mode (void) |
211 | { | |
7b0518e3 | 212 | return targetm.unwind_word_mode (); |
93f90be6 FJ |
213 | } |
214 | ||
c7ff6e7a AK |
215 | enum machine_mode |
216 | default_libgcc_cmp_return_mode (void) | |
217 | { | |
218 | return word_mode; | |
219 | } | |
220 | ||
221 | enum machine_mode | |
222 | default_libgcc_shift_count_mode (void) | |
223 | { | |
224 | return word_mode; | |
225 | } | |
226 | ||
7b0518e3 UW |
227 | enum machine_mode |
228 | default_unwind_word_mode (void) | |
229 | { | |
230 | return word_mode; | |
231 | } | |
232 | ||
273a2526 RS |
233 | /* The default implementation of TARGET_SHIFT_TRUNCATION_MASK. */ |
234 | ||
235 | unsigned HOST_WIDE_INT | |
236 | default_shift_truncation_mask (enum machine_mode mode) | |
237 | { | |
238 | return SHIFT_COUNT_TRUNCATED ? GET_MODE_BITSIZE (mode) - 1 : 0; | |
239 | } | |
240 | ||
bc23502b PB |
241 | /* The default implementation of TARGET_MIN_DIVISIONS_FOR_RECIP_MUL. */ |
242 | ||
243 | unsigned int | |
244 | default_min_divisions_for_recip_mul (enum machine_mode mode ATTRIBUTE_UNUSED) | |
245 | { | |
246 | return have_insn_for (DIV, mode) ? 3 : 2; | |
247 | } | |
248 | ||
b12cbf2c AN |
249 | /* The default implementation of TARGET_MODE_REP_EXTENDED. */ |
250 | ||
251 | int | |
252 | default_mode_rep_extended (enum machine_mode mode ATTRIBUTE_UNUSED, | |
253 | enum machine_mode mode_rep ATTRIBUTE_UNUSED) | |
254 | { | |
255 | return UNKNOWN; | |
256 | } | |
257 | ||
c6e8c921 | 258 | /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns true. */ |
0938c9e8 | 259 | |
c6e8c921 | 260 | bool |
d5cc9181 | 261 | hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t a ATTRIBUTE_UNUSED) |
c6e8c921 GK |
262 | { |
263 | return true; | |
264 | } | |
4185ae53 | 265 | |
c77cd3d1 UB |
266 | /* Return machine mode for non-standard suffix |
267 | or VOIDmode if non-standard suffixes are unsupported. */ | |
268 | enum machine_mode | |
269 | default_mode_for_suffix (char suffix ATTRIBUTE_UNUSED) | |
270 | { | |
271 | return VOIDmode; | |
272 | } | |
4185ae53 PB |
273 | |
274 | /* The generic C++ ABI specifies this is a 64-bit value. */ | |
275 | tree | |
276 | default_cxx_guard_type (void) | |
277 | { | |
278 | return long_long_integer_type_node; | |
279 | } | |
46e995e0 | 280 | |
46e995e0 PB |
281 | /* Returns the size of the cookie to use when allocating an array |
282 | whose elements have the indicated TYPE. Assumes that it is already | |
283 | known that a cookie is needed. */ | |
284 | ||
285 | tree | |
286 | default_cxx_get_cookie_size (tree type) | |
287 | { | |
288 | tree cookie_size; | |
289 | ||
290 | /* We need to allocate an additional max (sizeof (size_t), alignof | |
291 | (true_type)) bytes. */ | |
292 | tree sizetype_size; | |
293 | tree type_align; | |
a1c496cb | 294 | |
46e995e0 PB |
295 | sizetype_size = size_in_bytes (sizetype); |
296 | type_align = size_int (TYPE_ALIGN_UNIT (type)); | |
807e902e | 297 | if (tree_int_cst_lt (type_align, sizetype_size)) |
46e995e0 PB |
298 | cookie_size = sizetype_size; |
299 | else | |
300 | cookie_size = type_align; | |
301 | ||
302 | return cookie_size; | |
303 | } | |
8cd5a4e0 | 304 | |
8cd5a4e0 RH |
305 | /* Return true if a parameter must be passed by reference. This version |
306 | of the TARGET_PASS_BY_REFERENCE hook uses just MUST_PASS_IN_STACK. */ | |
307 | ||
308 | bool | |
d5cc9181 | 309 | hook_pass_by_reference_must_pass_in_stack (cumulative_args_t c ATTRIBUTE_UNUSED, |
586de218 | 310 | enum machine_mode mode ATTRIBUTE_UNUSED, const_tree type ATTRIBUTE_UNUSED, |
8cd5a4e0 RH |
311 | bool named_arg ATTRIBUTE_UNUSED) |
312 | { | |
313 | return targetm.calls.must_pass_in_stack (mode, type); | |
314 | } | |
951120ea | 315 | |
6cdd5672 RH |
316 | /* Return true if a parameter follows callee copies conventions. This |
317 | version of the hook is true for all named arguments. */ | |
318 | ||
319 | bool | |
d5cc9181 | 320 | hook_callee_copies_named (cumulative_args_t ca ATTRIBUTE_UNUSED, |
6cdd5672 | 321 | enum machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 322 | const_tree type ATTRIBUTE_UNUSED, bool named) |
6cdd5672 RH |
323 | { |
324 | return named; | |
325 | } | |
951120ea | 326 | |
6e2188e0 NF |
327 | /* Emit to STREAM the assembler syntax for insn operand X. */ |
328 | ||
329 | void | |
330 | default_print_operand (FILE *stream ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, | |
331 | int code ATTRIBUTE_UNUSED) | |
332 | { | |
333 | #ifdef PRINT_OPERAND | |
334 | PRINT_OPERAND (stream, x, code); | |
335 | #else | |
336 | gcc_unreachable (); | |
337 | #endif | |
338 | } | |
339 | ||
340 | /* Emit to STREAM the assembler syntax for an insn operand whose memory | |
341 | address is X. */ | |
342 | ||
343 | void | |
344 | default_print_operand_address (FILE *stream ATTRIBUTE_UNUSED, | |
345 | rtx x ATTRIBUTE_UNUSED) | |
346 | { | |
347 | #ifdef PRINT_OPERAND_ADDRESS | |
348 | PRINT_OPERAND_ADDRESS (stream, x); | |
349 | #else | |
350 | gcc_unreachable (); | |
351 | #endif | |
352 | } | |
353 | ||
354 | /* Return true if CODE is a valid punctuation character for the | |
355 | `print_operand' hook. */ | |
356 | ||
357 | bool | |
358 | default_print_operand_punct_valid_p (unsigned char code ATTRIBUTE_UNUSED) | |
359 | { | |
360 | #ifdef PRINT_OPERAND_PUNCT_VALID_P | |
361 | return PRINT_OPERAND_PUNCT_VALID_P (code); | |
362 | #else | |
363 | return false; | |
364 | #endif | |
365 | } | |
366 | ||
77754180 DK |
367 | /* The default implementation of TARGET_MANGLE_ASSEMBLER_NAME. */ |
368 | tree | |
369 | default_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED) | |
370 | { | |
371 | const char *skipped = name + (*name == '*' ? 1 : 0); | |
372 | const char *stripped = targetm.strip_name_encoding (skipped); | |
373 | if (*name != '*' && user_label_prefix[0]) | |
374 | stripped = ACONCAT ((user_label_prefix, stripped, NULL)); | |
375 | return get_identifier (stripped); | |
376 | } | |
377 | ||
6dd53648 RH |
378 | /* True if MODE is valid for the target. By "valid", we mean able to |
379 | be manipulated in non-trivial ways. In particular, this means all | |
380 | the arithmetic is supported. | |
381 | ||
382 | By default we guess this means that any C type is supported. If | |
383 | we can't map the mode back to a type that would be available in C, | |
384 | then reject it. Special case, here, is the double-word arithmetic | |
385 | supported by optabs.c. */ | |
386 | ||
387 | bool | |
388 | default_scalar_mode_supported_p (enum machine_mode mode) | |
389 | { | |
390 | int precision = GET_MODE_PRECISION (mode); | |
391 | ||
392 | switch (GET_MODE_CLASS (mode)) | |
393 | { | |
394 | case MODE_PARTIAL_INT: | |
395 | case MODE_INT: | |
396 | if (precision == CHAR_TYPE_SIZE) | |
397 | return true; | |
398 | if (precision == SHORT_TYPE_SIZE) | |
399 | return true; | |
400 | if (precision == INT_TYPE_SIZE) | |
401 | return true; | |
402 | if (precision == LONG_TYPE_SIZE) | |
403 | return true; | |
404 | if (precision == LONG_LONG_TYPE_SIZE) | |
405 | return true; | |
406 | if (precision == 2 * BITS_PER_WORD) | |
407 | return true; | |
408 | return false; | |
409 | ||
410 | case MODE_FLOAT: | |
411 | if (precision == FLOAT_TYPE_SIZE) | |
412 | return true; | |
413 | if (precision == DOUBLE_TYPE_SIZE) | |
414 | return true; | |
415 | if (precision == LONG_DOUBLE_TYPE_SIZE) | |
416 | return true; | |
417 | return false; | |
418 | ||
9a8ce21f | 419 | case MODE_DECIMAL_FLOAT: |
ab22c1fa CF |
420 | case MODE_FRACT: |
421 | case MODE_UFRACT: | |
422 | case MODE_ACCUM: | |
423 | case MODE_UACCUM: | |
9a8ce21f JG |
424 | return false; |
425 | ||
6dd53648 | 426 | default: |
1e128c5f | 427 | gcc_unreachable (); |
6dd53648 RH |
428 | } |
429 | } | |
6cdd5672 | 430 | |
8cc4b7a2 JM |
431 | /* Return true if libgcc supports floating-point mode MODE (known to |
432 | be supported as a scalar mode). */ | |
433 | ||
434 | bool | |
435 | default_libgcc_floating_mode_supported_p (enum machine_mode mode) | |
436 | { | |
437 | switch (mode) | |
438 | { | |
439 | #ifdef HAVE_SFmode | |
440 | case SFmode: | |
441 | #endif | |
442 | #ifdef HAVE_DFmode | |
443 | case DFmode: | |
444 | #endif | |
445 | #ifdef HAVE_XFmode | |
446 | case XFmode: | |
447 | #endif | |
448 | #ifdef HAVE_TFmode | |
449 | case TFmode: | |
450 | #endif | |
451 | return true; | |
452 | ||
453 | default: | |
454 | return false; | |
455 | } | |
456 | } | |
457 | ||
2e681adf JR |
458 | /* Make some target macros useable by target-independent code. */ |
459 | bool | |
460 | targhook_words_big_endian (void) | |
461 | { | |
462 | return !!WORDS_BIG_ENDIAN; | |
463 | } | |
464 | ||
465 | bool | |
466 | targhook_float_words_big_endian (void) | |
467 | { | |
468 | return !!FLOAT_WORDS_BIG_ENDIAN; | |
469 | } | |
470 | ||
9193fb05 JM |
471 | /* True if the target supports floating-point exceptions and rounding |
472 | modes. */ | |
473 | ||
474 | bool | |
475 | default_float_exceptions_rounding_supported_p (void) | |
476 | { | |
477 | #ifdef HAVE_adddf3 | |
478 | return HAVE_adddf3; | |
479 | #else | |
480 | return false; | |
481 | #endif | |
482 | } | |
483 | ||
0884546e BE |
484 | /* True if the target supports decimal floating point. */ |
485 | ||
486 | bool | |
487 | default_decimal_float_supported_p (void) | |
488 | { | |
489 | return ENABLE_DECIMAL_FLOAT; | |
490 | } | |
491 | ||
ab22c1fa CF |
492 | /* True if the target supports fixed-point arithmetic. */ |
493 | ||
494 | bool | |
495 | default_fixed_point_supported_p (void) | |
496 | { | |
497 | return ENABLE_FIXED_POINT; | |
498 | } | |
499 | ||
2f251a05 AI |
500 | /* True if the target supports GNU indirect functions. */ |
501 | ||
502 | bool | |
503 | default_has_ifunc_p (void) | |
504 | { | |
505 | return HAVE_GNU_INDIRECT_FUNCTION; | |
506 | } | |
507 | ||
e7e64a25 AS |
508 | /* NULL if INSN insn is valid within a low-overhead loop, otherwise returns |
509 | an error message. | |
b8698a0f | 510 | |
0fa2e4df | 511 | This function checks whether a given INSN is valid within a low-overhead |
e7e64a25 AS |
512 | loop. If INSN is invalid it returns the reason for that, otherwise it |
513 | returns NULL. A called function may clobber any special registers required | |
514 | for low-overhead looping. Additionally, some targets (eg, PPC) use the count | |
a71a498d AS |
515 | register for branch on table instructions. We reject the doloop pattern in |
516 | these cases. */ | |
517 | ||
e7e64a25 | 518 | const char * |
ac44248e | 519 | default_invalid_within_doloop (const rtx_insn *insn) |
a71a498d AS |
520 | { |
521 | if (CALL_P (insn)) | |
e7e64a25 | 522 | return "Function call in loop."; |
b8698a0f | 523 | |
39718607 | 524 | if (tablejump_p (insn, NULL, NULL) || computed_jump_p (insn)) |
e7e64a25 | 525 | return "Computed branch in the loop."; |
b8698a0f | 526 | |
e7e64a25 | 527 | return NULL; |
a71a498d AS |
528 | } |
529 | ||
2505a3f2 RG |
530 | /* Mapping of builtin functions to vectorized variants. */ |
531 | ||
532 | tree | |
62f7fd21 | 533 | default_builtin_vectorized_function (tree fndecl ATTRIBUTE_UNUSED, |
b95becfc RG |
534 | tree type_out ATTRIBUTE_UNUSED, |
535 | tree type_in ATTRIBUTE_UNUSED) | |
2505a3f2 RG |
536 | { |
537 | return NULL_TREE; | |
538 | } | |
539 | ||
f57d17f1 TM |
540 | /* Vectorized conversion. */ |
541 | ||
542 | tree | |
744aa42f | 543 | default_builtin_vectorized_conversion (unsigned int code ATTRIBUTE_UNUSED, |
88dd7150 RG |
544 | tree dest_type ATTRIBUTE_UNUSED, |
545 | tree src_type ATTRIBUTE_UNUSED) | |
f57d17f1 TM |
546 | { |
547 | return NULL_TREE; | |
548 | } | |
549 | ||
35e1a5e7 IR |
550 | /* Default vectorizer cost model values. */ |
551 | ||
552 | int | |
720f5239 | 553 | default_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost, |
a21892ad | 554 | tree vectype, |
720f5239 | 555 | int misalign ATTRIBUTE_UNUSED) |
35e1a5e7 | 556 | { |
a21892ad BS |
557 | unsigned elements; |
558 | ||
35e1a5e7 IR |
559 | switch (type_of_cost) |
560 | { | |
561 | case scalar_stmt: | |
562 | case scalar_load: | |
563 | case scalar_store: | |
564 | case vector_stmt: | |
565 | case vector_load: | |
566 | case vector_store: | |
567 | case vec_to_scalar: | |
568 | case scalar_to_vec: | |
569 | case cond_branch_not_taken: | |
570 | case vec_perm: | |
8bd37302 | 571 | case vec_promote_demote: |
35e1a5e7 IR |
572 | return 1; |
573 | ||
574 | case unaligned_load: | |
720f5239 | 575 | case unaligned_store: |
35e1a5e7 IR |
576 | return 2; |
577 | ||
578 | case cond_branch_taken: | |
579 | return 3; | |
580 | ||
a21892ad BS |
581 | case vec_construct: |
582 | elements = TYPE_VECTOR_SUBPARTS (vectype); | |
583 | return elements / 2 + 1; | |
584 | ||
35e1a5e7 IR |
585 | default: |
586 | gcc_unreachable (); | |
587 | } | |
588 | } | |
589 | ||
cc2137be UB |
590 | /* Reciprocal. */ |
591 | ||
592 | tree | |
744aa42f | 593 | default_builtin_reciprocal (unsigned int fn ATTRIBUTE_UNUSED, |
ac10986f | 594 | bool md_fn ATTRIBUTE_UNUSED, |
cc2137be UB |
595 | bool sqrt ATTRIBUTE_UNUSED) |
596 | { | |
597 | return NULL_TREE; | |
598 | } | |
599 | ||
6cdd5672 RH |
600 | bool |
601 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false ( | |
d5cc9181 | 602 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
6cdd5672 | 603 | enum machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 604 | const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
6cdd5672 RH |
605 | { |
606 | return false; | |
607 | } | |
608 | ||
609 | bool | |
610 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true ( | |
d5cc9181 | 611 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
6cdd5672 | 612 | enum machine_mode mode ATTRIBUTE_UNUSED, |
586de218 | 613 | const_tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) |
6cdd5672 RH |
614 | { |
615 | return true; | |
616 | } | |
78a52f11 RH |
617 | |
618 | int | |
619 | hook_int_CUMULATIVE_ARGS_mode_tree_bool_0 ( | |
d5cc9181 | 620 | cumulative_args_t ca ATTRIBUTE_UNUSED, |
78a52f11 RH |
621 | enum machine_mode mode ATTRIBUTE_UNUSED, |
622 | tree type ATTRIBUTE_UNUSED, bool named ATTRIBUTE_UNUSED) | |
623 | { | |
624 | return 0; | |
625 | } | |
4d3e6fae | 626 | |
3c07301f | 627 | void |
d5cc9181 | 628 | default_function_arg_advance (cumulative_args_t ca ATTRIBUTE_UNUSED, |
3c07301f NF |
629 | enum machine_mode mode ATTRIBUTE_UNUSED, |
630 | const_tree type ATTRIBUTE_UNUSED, | |
631 | bool named ATTRIBUTE_UNUSED) | |
632 | { | |
3c07301f | 633 | gcc_unreachable (); |
3c07301f NF |
634 | } |
635 | ||
636 | rtx | |
d5cc9181 | 637 | default_function_arg (cumulative_args_t ca ATTRIBUTE_UNUSED, |
3c07301f NF |
638 | enum machine_mode mode ATTRIBUTE_UNUSED, |
639 | const_tree type ATTRIBUTE_UNUSED, | |
640 | bool named ATTRIBUTE_UNUSED) | |
641 | { | |
3c07301f | 642 | gcc_unreachable (); |
3c07301f NF |
643 | } |
644 | ||
645 | rtx | |
d5cc9181 | 646 | default_function_incoming_arg (cumulative_args_t ca ATTRIBUTE_UNUSED, |
3c07301f NF |
647 | enum machine_mode mode ATTRIBUTE_UNUSED, |
648 | const_tree type ATTRIBUTE_UNUSED, | |
649 | bool named ATTRIBUTE_UNUSED) | |
650 | { | |
3c07301f | 651 | gcc_unreachable (); |
3c07301f NF |
652 | } |
653 | ||
c2ed6cf8 NF |
654 | unsigned int |
655 | default_function_arg_boundary (enum machine_mode mode ATTRIBUTE_UNUSED, | |
656 | const_tree type ATTRIBUTE_UNUSED) | |
657 | { | |
658 | return PARM_BOUNDARY; | |
659 | } | |
660 | ||
123148b5 BS |
661 | unsigned int |
662 | default_function_arg_round_boundary (enum machine_mode mode ATTRIBUTE_UNUSED, | |
663 | const_tree type ATTRIBUTE_UNUSED) | |
664 | { | |
665 | return PARM_BOUNDARY; | |
666 | } | |
667 | ||
b8698a0f | 668 | void |
912f2dac DB |
669 | hook_void_bitmap (bitmap regs ATTRIBUTE_UNUSED) |
670 | { | |
671 | } | |
672 | ||
4d3e6fae FJ |
673 | const char * |
674 | hook_invalid_arg_for_unprototyped_fn ( | |
3101faab KG |
675 | const_tree typelist ATTRIBUTE_UNUSED, |
676 | const_tree funcdecl ATTRIBUTE_UNUSED, | |
677 | const_tree val ATTRIBUTE_UNUSED) | |
4d3e6fae FJ |
678 | { |
679 | return NULL; | |
680 | } | |
7d69de61 RH |
681 | |
682 | /* Initialize the stack protection decls. */ | |
683 | ||
684 | /* Stack protection related decls living in libgcc. */ | |
685 | static GTY(()) tree stack_chk_guard_decl; | |
686 | ||
687 | tree | |
688 | default_stack_protect_guard (void) | |
689 | { | |
690 | tree t = stack_chk_guard_decl; | |
691 | ||
692 | if (t == NULL) | |
693 | { | |
623a6941 MK |
694 | rtx x; |
695 | ||
c2255bc4 AH |
696 | t = build_decl (UNKNOWN_LOCATION, |
697 | VAR_DECL, get_identifier ("__stack_chk_guard"), | |
7d69de61 RH |
698 | ptr_type_node); |
699 | TREE_STATIC (t) = 1; | |
700 | TREE_PUBLIC (t) = 1; | |
701 | DECL_EXTERNAL (t) = 1; | |
702 | TREE_USED (t) = 1; | |
703 | TREE_THIS_VOLATILE (t) = 1; | |
704 | DECL_ARTIFICIAL (t) = 1; | |
705 | DECL_IGNORED_P (t) = 1; | |
706 | ||
623a6941 MK |
707 | /* Do not share RTL as the declaration is visible outside of |
708 | current function. */ | |
709 | x = DECL_RTL (t); | |
710 | RTX_FLAG (x, used) = 1; | |
711 | ||
7d69de61 RH |
712 | stack_chk_guard_decl = t; |
713 | } | |
714 | ||
715 | return t; | |
716 | } | |
717 | ||
718 | static GTY(()) tree stack_chk_fail_decl; | |
719 | ||
b8698a0f | 720 | tree |
7d69de61 RH |
721 | default_external_stack_protect_fail (void) |
722 | { | |
723 | tree t = stack_chk_fail_decl; | |
724 | ||
725 | if (t == NULL_TREE) | |
726 | { | |
727 | t = build_function_type_list (void_type_node, NULL_TREE); | |
c2255bc4 AH |
728 | t = build_decl (UNKNOWN_LOCATION, |
729 | FUNCTION_DECL, get_identifier ("__stack_chk_fail"), t); | |
7d69de61 RH |
730 | TREE_STATIC (t) = 1; |
731 | TREE_PUBLIC (t) = 1; | |
732 | DECL_EXTERNAL (t) = 1; | |
733 | TREE_USED (t) = 1; | |
734 | TREE_THIS_VOLATILE (t) = 1; | |
735 | TREE_NOTHROW (t) = 1; | |
736 | DECL_ARTIFICIAL (t) = 1; | |
737 | DECL_IGNORED_P (t) = 1; | |
5b5cba1f JM |
738 | DECL_VISIBILITY (t) = VISIBILITY_DEFAULT; |
739 | DECL_VISIBILITY_SPECIFIED (t) = 1; | |
7d69de61 RH |
740 | |
741 | stack_chk_fail_decl = t; | |
742 | } | |
743 | ||
5039610b | 744 | return build_call_expr (t, 0); |
7d69de61 RH |
745 | } |
746 | ||
747 | tree | |
748 | default_hidden_stack_protect_fail (void) | |
749 | { | |
7ce918c5 JJ |
750 | #ifndef HAVE_GAS_HIDDEN |
751 | return default_external_stack_protect_fail (); | |
752 | #else | |
7d69de61 RH |
753 | tree t = stack_chk_fail_decl; |
754 | ||
7ce918c5 JJ |
755 | if (!flag_pic) |
756 | return default_external_stack_protect_fail (); | |
757 | ||
758 | if (t == NULL_TREE) | |
7d69de61 RH |
759 | { |
760 | t = build_function_type_list (void_type_node, NULL_TREE); | |
c2255bc4 | 761 | t = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL, |
7d69de61 RH |
762 | get_identifier ("__stack_chk_fail_local"), t); |
763 | TREE_STATIC (t) = 1; | |
764 | TREE_PUBLIC (t) = 1; | |
765 | DECL_EXTERNAL (t) = 1; | |
766 | TREE_USED (t) = 1; | |
767 | TREE_THIS_VOLATILE (t) = 1; | |
768 | TREE_NOTHROW (t) = 1; | |
769 | DECL_ARTIFICIAL (t) = 1; | |
770 | DECL_IGNORED_P (t) = 1; | |
771 | DECL_VISIBILITY_SPECIFIED (t) = 1; | |
772 | DECL_VISIBILITY (t) = VISIBILITY_HIDDEN; | |
773 | ||
774 | stack_chk_fail_decl = t; | |
775 | } | |
776 | ||
5039610b | 777 | return build_call_expr (t, 0); |
7ce918c5 | 778 | #endif |
7d69de61 RH |
779 | } |
780 | ||
8ddf681a | 781 | bool |
3101faab KG |
782 | hook_bool_const_rtx_commutative_p (const_rtx x, |
783 | int outer_code ATTRIBUTE_UNUSED) | |
8ddf681a R |
784 | { |
785 | return COMMUTATIVE_P (x); | |
786 | } | |
787 | ||
1d636cc6 | 788 | rtx |
586de218 KG |
789 | default_function_value (const_tree ret_type ATTRIBUTE_UNUSED, |
790 | const_tree fn_decl_or_type, | |
1d636cc6 RG |
791 | bool outgoing ATTRIBUTE_UNUSED) |
792 | { | |
793 | /* The old interface doesn't handle receiving the function type. */ | |
794 | if (fn_decl_or_type | |
795 | && !DECL_P (fn_decl_or_type)) | |
796 | fn_decl_or_type = NULL; | |
797 | ||
1d636cc6 RG |
798 | #ifdef FUNCTION_VALUE |
799 | return FUNCTION_VALUE (ret_type, fn_decl_or_type); | |
800 | #else | |
7fc6a96b | 801 | gcc_unreachable (); |
1d636cc6 RG |
802 | #endif |
803 | } | |
804 | ||
390b17c2 | 805 | rtx |
7fc6a96b AS |
806 | default_libcall_value (enum machine_mode mode ATTRIBUTE_UNUSED, |
807 | const_rtx fun ATTRIBUTE_UNUSED) | |
390b17c2 | 808 | { |
7fc6a96b | 809 | #ifdef LIBCALL_VALUE |
390b17c2 | 810 | return LIBCALL_VALUE (mode); |
7fc6a96b AS |
811 | #else |
812 | gcc_unreachable (); | |
813 | #endif | |
390b17c2 RE |
814 | } |
815 | ||
82f81f18 AS |
816 | /* The default hook for TARGET_FUNCTION_VALUE_REGNO_P. */ |
817 | ||
818 | bool | |
819 | default_function_value_regno_p (const unsigned int regno ATTRIBUTE_UNUSED) | |
820 | { | |
821 | #ifdef FUNCTION_VALUE_REGNO_P | |
822 | return FUNCTION_VALUE_REGNO_P (regno); | |
823 | #else | |
824 | gcc_unreachable (); | |
825 | #endif | |
826 | } | |
827 | ||
150cdc9e RH |
828 | rtx |
829 | default_internal_arg_pointer (void) | |
830 | { | |
831 | /* If the reg that the virtual arg pointer will be translated into is | |
832 | not a fixed reg or is the stack pointer, make a copy of the virtual | |
833 | arg pointer, and address parms via the copy. The frame pointer is | |
834 | considered fixed even though it is not marked as such. */ | |
835 | if ((ARG_POINTER_REGNUM == STACK_POINTER_REGNUM | |
836 | || ! (fixed_regs[ARG_POINTER_REGNUM] | |
837 | || ARG_POINTER_REGNUM == FRAME_POINTER_REGNUM))) | |
838 | return copy_to_reg (virtual_incoming_args_rtx); | |
839 | else | |
840 | return virtual_incoming_args_rtx; | |
841 | } | |
842 | ||
531ca746 RH |
843 | rtx |
844 | default_static_chain (const_tree fndecl, bool incoming_p) | |
845 | { | |
9f62cb92 | 846 | if (!DECL_STATIC_CHAIN (fndecl)) |
531ca746 RH |
847 | return NULL; |
848 | ||
849 | if (incoming_p) | |
850 | { | |
531ca746 RH |
851 | #ifdef STATIC_CHAIN_INCOMING_REGNUM |
852 | return gen_rtx_REG (Pmode, STATIC_CHAIN_INCOMING_REGNUM); | |
853 | #endif | |
854 | } | |
855 | ||
531ca746 RH |
856 | #ifdef STATIC_CHAIN_REGNUM |
857 | return gen_rtx_REG (Pmode, STATIC_CHAIN_REGNUM); | |
858 | #endif | |
859 | ||
2b4fa409 RH |
860 | { |
861 | static bool issued_error; | |
862 | if (!issued_error) | |
863 | { | |
864 | issued_error = true; | |
865 | sorry ("nested functions not supported on this target"); | |
866 | } | |
867 | ||
868 | /* It really doesn't matter what we return here, so long at it | |
869 | doesn't cause the rest of the compiler to crash. */ | |
870 | return gen_rtx_MEM (Pmode, stack_pointer_rtx); | |
871 | } | |
531ca746 RH |
872 | } |
873 | ||
531ca746 RH |
874 | void |
875 | default_trampoline_init (rtx ARG_UNUSED (m_tramp), tree ARG_UNUSED (t_func), | |
876 | rtx ARG_UNUSED (r_chain)) | |
877 | { | |
531ca746 | 878 | sorry ("nested function trampolines not supported on this target"); |
531ca746 RH |
879 | } |
880 | ||
079e7538 NF |
881 | int |
882 | default_return_pops_args (tree fundecl ATTRIBUTE_UNUSED, | |
883 | tree funtype ATTRIBUTE_UNUSED, | |
884 | int size ATTRIBUTE_UNUSED) | |
885 | { | |
886 | return 0; | |
887 | } | |
888 | ||
a87cf97e | 889 | reg_class_t |
81f40b79 ILT |
890 | default_branch_target_register_class (void) |
891 | { | |
892 | return NO_REGS; | |
893 | } | |
894 | ||
55a2c322 VM |
895 | extern bool |
896 | default_lra_p (void) | |
897 | { | |
898 | return false; | |
899 | } | |
900 | ||
901 | int | |
902 | default_register_priority (int hard_regno ATTRIBUTE_UNUSED) | |
903 | { | |
904 | return 0; | |
905 | } | |
906 | ||
3b9ceb4b VM |
907 | extern bool |
908 | default_register_usage_leveling_p (void) | |
909 | { | |
910 | return false; | |
911 | } | |
912 | ||
55a2c322 VM |
913 | extern bool |
914 | default_different_addr_displacement_p (void) | |
915 | { | |
916 | return false; | |
917 | } | |
918 | ||
a87cf97e | 919 | reg_class_t |
8a99f6f9 | 920 | default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, |
a87cf97e | 921 | reg_class_t reload_class_i ATTRIBUTE_UNUSED, |
8a99f6f9 R |
922 | enum machine_mode reload_mode ATTRIBUTE_UNUSED, |
923 | secondary_reload_info *sri) | |
924 | { | |
48c54229 | 925 | enum reg_class rclass = NO_REGS; |
a87cf97e | 926 | enum reg_class reload_class = (enum reg_class) reload_class_i; |
8a99f6f9 R |
927 | |
928 | if (sri->prev_sri && sri->prev_sri->t_icode != CODE_FOR_nothing) | |
929 | { | |
930 | sri->icode = sri->prev_sri->t_icode; | |
931 | return NO_REGS; | |
932 | } | |
933 | #ifdef SECONDARY_INPUT_RELOAD_CLASS | |
934 | if (in_p) | |
48c54229 | 935 | rclass = SECONDARY_INPUT_RELOAD_CLASS (reload_class, reload_mode, x); |
8a99f6f9 R |
936 | #endif |
937 | #ifdef SECONDARY_OUTPUT_RELOAD_CLASS | |
938 | if (! in_p) | |
48c54229 | 939 | rclass = SECONDARY_OUTPUT_RELOAD_CLASS (reload_class, reload_mode, x); |
8a99f6f9 | 940 | #endif |
48c54229 | 941 | if (rclass != NO_REGS) |
8a99f6f9 | 942 | { |
f9621cc4 RS |
943 | enum insn_code icode |
944 | = direct_optab_handler (in_p ? reload_in_optab : reload_out_optab, | |
945 | reload_mode); | |
8a99f6f9 R |
946 | |
947 | if (icode != CODE_FOR_nothing | |
2ef6ce06 | 948 | && !insn_operand_matches (icode, in_p, x)) |
8a99f6f9 R |
949 | icode = CODE_FOR_nothing; |
950 | else if (icode != CODE_FOR_nothing) | |
951 | { | |
952 | const char *insn_constraint, *scratch_constraint; | |
8a99f6f9 R |
953 | enum reg_class insn_class, scratch_class; |
954 | ||
955 | gcc_assert (insn_data[(int) icode].n_operands == 3); | |
956 | insn_constraint = insn_data[(int) icode].operand[!in_p].constraint; | |
957 | if (!*insn_constraint) | |
958 | insn_class = ALL_REGS; | |
959 | else | |
960 | { | |
961 | if (in_p) | |
962 | { | |
963 | gcc_assert (*insn_constraint == '='); | |
964 | insn_constraint++; | |
965 | } | |
8677664e RS |
966 | insn_class = (reg_class_for_constraint |
967 | (lookup_constraint (insn_constraint))); | |
8a99f6f9 R |
968 | gcc_assert (insn_class != NO_REGS); |
969 | } | |
970 | ||
971 | scratch_constraint = insn_data[(int) icode].operand[2].constraint; | |
11e30dd8 HPN |
972 | /* The scratch register's constraint must start with "=&", |
973 | except for an input reload, where only "=" is necessary, | |
974 | and where it might be beneficial to re-use registers from | |
975 | the input. */ | |
8a99f6f9 | 976 | gcc_assert (scratch_constraint[0] == '=' |
11e30dd8 HPN |
977 | && (in_p || scratch_constraint[1] == '&')); |
978 | scratch_constraint++; | |
979 | if (*scratch_constraint == '&') | |
980 | scratch_constraint++; | |
8677664e RS |
981 | scratch_class = (reg_class_for_constraint |
982 | (lookup_constraint (scratch_constraint))); | |
8a99f6f9 R |
983 | |
984 | if (reg_class_subset_p (reload_class, insn_class)) | |
985 | { | |
48c54229 KG |
986 | gcc_assert (scratch_class == rclass); |
987 | rclass = NO_REGS; | |
8a99f6f9 R |
988 | } |
989 | else | |
48c54229 | 990 | rclass = insn_class; |
8a99f6f9 R |
991 | |
992 | } | |
48c54229 | 993 | if (rclass == NO_REGS) |
8a99f6f9 R |
994 | sri->icode = icode; |
995 | else | |
996 | sri->t_icode = icode; | |
997 | } | |
48c54229 | 998 | return rclass; |
8a99f6f9 R |
999 | } |
1000 | ||
9b580a0b RH |
1001 | /* By default, if flag_pic is true, then neither local nor global relocs |
1002 | should be placed in readonly memory. */ | |
1003 | ||
1004 | int | |
1005 | default_reloc_rw_mask (void) | |
1006 | { | |
1007 | return flag_pic ? 3 : 0; | |
1008 | } | |
1009 | ||
5234b8f5 DS |
1010 | /* By default, do no modification. */ |
1011 | tree default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED, | |
1012 | tree id) | |
1013 | { | |
1014 | return id; | |
1015 | } | |
1016 | ||
5aea1e76 UW |
1017 | /* Default to natural alignment for vector types. */ |
1018 | HOST_WIDE_INT | |
1019 | default_vector_alignment (const_tree type) | |
1020 | { | |
9439e9a1 | 1021 | return tree_to_shwi (TYPE_SIZE (type)); |
5aea1e76 UW |
1022 | } |
1023 | ||
5b900a4c | 1024 | bool |
3101faab | 1025 | default_builtin_vector_alignment_reachable (const_tree type, bool is_packed) |
5b900a4c DN |
1026 | { |
1027 | if (is_packed) | |
1028 | return false; | |
1029 | ||
1030 | /* Assuming that types whose size is > pointer-size are not guaranteed to be | |
1031 | naturally aligned. */ | |
1032 | if (tree_int_cst_compare (TYPE_SIZE (type), bitsize_int (POINTER_SIZE)) > 0) | |
1033 | return false; | |
1034 | ||
1035 | /* Assuming that types whose size is <= pointer-size | |
1036 | are naturally aligned. */ | |
1037 | return true; | |
1038 | } | |
1039 | ||
0601d0cf | 1040 | /* By default, assume that a target supports any factor of misalignment |
b8698a0f | 1041 | memory access if it supports movmisalign patten. |
0601d0cf RE |
1042 | is_packed is true if the memory access is defined in a packed struct. */ |
1043 | bool | |
1044 | default_builtin_support_vector_misalignment (enum machine_mode mode, | |
1045 | const_tree type | |
1046 | ATTRIBUTE_UNUSED, | |
1047 | int misalignment | |
1048 | ATTRIBUTE_UNUSED, | |
1049 | bool is_packed | |
1050 | ATTRIBUTE_UNUSED) | |
1051 | { | |
947131ba | 1052 | if (optab_handler (movmisalign_optab, mode) != CODE_FOR_nothing) |
0601d0cf RE |
1053 | return true; |
1054 | return false; | |
1055 | } | |
1056 | ||
26983c22 L |
1057 | /* By default, only attempt to parallelize bitwise operations, and |
1058 | possibly adds/subtracts using bit-twiddling. */ | |
1059 | ||
cc4b5170 RG |
1060 | enum machine_mode |
1061 | default_preferred_simd_mode (enum machine_mode mode ATTRIBUTE_UNUSED) | |
26983c22 | 1062 | { |
cc4b5170 | 1063 | return word_mode; |
26983c22 L |
1064 | } |
1065 | ||
767f865f RG |
1066 | /* By default only the size derived from the preferred vector mode |
1067 | is tried. */ | |
1068 | ||
1069 | unsigned int | |
1070 | default_autovectorize_vector_sizes (void) | |
1071 | { | |
1072 | return 0; | |
1073 | } | |
1074 | ||
92345349 BS |
1075 | /* By default, the cost model accumulates three separate costs (prologue, |
1076 | loop body, and epilogue) for a vectorized loop or block. So allocate an | |
1077 | array of three unsigned ints, set it to zero, and return its address. */ | |
c3e7ee41 BS |
1078 | |
1079 | void * | |
1080 | default_init_cost (struct loop *loop_info ATTRIBUTE_UNUSED) | |
1081 | { | |
92345349 BS |
1082 | unsigned *cost = XNEWVEC (unsigned, 3); |
1083 | cost[vect_prologue] = cost[vect_body] = cost[vect_epilogue] = 0; | |
c3e7ee41 BS |
1084 | return cost; |
1085 | } | |
1086 | ||
1087 | /* By default, the cost model looks up the cost of the given statement | |
1088 | kind and mode, multiplies it by the occurrence count, accumulates | |
92345349 | 1089 | it into the cost specified by WHERE, and returns the cost added. */ |
c3e7ee41 BS |
1090 | |
1091 | unsigned | |
1092 | default_add_stmt_cost (void *data, int count, enum vect_cost_for_stmt kind, | |
92345349 BS |
1093 | struct _stmt_vec_info *stmt_info, int misalign, |
1094 | enum vect_cost_model_location where) | |
c3e7ee41 BS |
1095 | { |
1096 | unsigned *cost = (unsigned *) data; | |
1097 | unsigned retval = 0; | |
1098 | ||
d6d11272 | 1099 | tree vectype = stmt_info ? stmt_vectype (stmt_info) : NULL_TREE; |
58e5400a BM |
1100 | int stmt_cost = targetm.vectorize.builtin_vectorization_cost (kind, vectype, |
1101 | misalign); | |
d6d11272 XDL |
1102 | /* Statements in an inner loop relative to the loop being |
1103 | vectorized are weighted more heavily. The value here is | |
1104 | arbitrary and could potentially be improved with analysis. */ | |
1105 | if (where == vect_body && stmt_info && stmt_in_inner_loop_p (stmt_info)) | |
1106 | count *= 50; /* FIXME. */ | |
1107 | ||
1108 | retval = (unsigned) (count * stmt_cost); | |
1109 | cost[where] += retval; | |
c3e7ee41 BS |
1110 | |
1111 | return retval; | |
1112 | } | |
1113 | ||
92345349 | 1114 | /* By default, the cost model just returns the accumulated costs. */ |
c3e7ee41 | 1115 | |
92345349 BS |
1116 | void |
1117 | default_finish_cost (void *data, unsigned *prologue_cost, | |
1118 | unsigned *body_cost, unsigned *epilogue_cost) | |
c3e7ee41 | 1119 | { |
92345349 BS |
1120 | unsigned *cost = (unsigned *) data; |
1121 | *prologue_cost = cost[vect_prologue]; | |
1122 | *body_cost = cost[vect_body]; | |
1123 | *epilogue_cost = cost[vect_epilogue]; | |
c3e7ee41 BS |
1124 | } |
1125 | ||
1126 | /* Free the cost data. */ | |
1127 | ||
1128 | void | |
1129 | default_destroy_cost_data (void *data) | |
1130 | { | |
1131 | free (data); | |
1132 | } | |
1133 | ||
d4ebfa65 BE |
1134 | /* Determine whether or not a pointer mode is valid. Assume defaults |
1135 | of ptr_mode or Pmode - can be overridden. */ | |
1136 | bool | |
1137 | default_valid_pointer_mode (enum machine_mode mode) | |
1138 | { | |
1139 | return (mode == ptr_mode || mode == Pmode); | |
1140 | } | |
1141 | ||
7352c013 RG |
1142 | /* Determine whether the memory reference specified by REF may alias |
1143 | the C libraries errno location. */ | |
1144 | bool | |
1145 | default_ref_may_alias_errno (ao_ref *ref) | |
1146 | { | |
1147 | tree base = ao_ref_base (ref); | |
1148 | /* The default implementation assumes the errno location is | |
1149 | a declaration of type int or is always accessed via a | |
1150 | pointer to int. We assume that accesses to errno are | |
1151 | not deliberately obfuscated (even in conforming ways). */ | |
1152 | if (TYPE_UNSIGNED (TREE_TYPE (base)) | |
1153 | || TYPE_MODE (TREE_TYPE (base)) != TYPE_MODE (integer_type_node)) | |
1154 | return false; | |
1155 | /* The default implementation assumes an errno location | |
1156 | declaration is never defined in the current compilation unit. */ | |
1157 | if (DECL_P (base) | |
1158 | && !TREE_STATIC (base)) | |
1159 | return true; | |
1160 | else if (TREE_CODE (base) == MEM_REF | |
1161 | && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME) | |
1162 | { | |
1163 | struct ptr_info_def *pi = SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)); | |
1164 | return !pi || pi->pt.anything || pi->pt.nonlocal; | |
1165 | } | |
1166 | return false; | |
1167 | } | |
1168 | ||
d4ebfa65 BE |
1169 | /* Return the mode for a pointer to a given ADDRSPACE, defaulting to ptr_mode |
1170 | for the generic address space only. */ | |
1171 | ||
1172 | enum machine_mode | |
1173 | default_addr_space_pointer_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) | |
1174 | { | |
1175 | gcc_assert (ADDR_SPACE_GENERIC_P (addrspace)); | |
1176 | return ptr_mode; | |
1177 | } | |
1178 | ||
1179 | /* Return the mode for an address in a given ADDRSPACE, defaulting to Pmode | |
1180 | for the generic address space only. */ | |
1181 | ||
1182 | enum machine_mode | |
1183 | default_addr_space_address_mode (addr_space_t addrspace ATTRIBUTE_UNUSED) | |
1184 | { | |
1185 | gcc_assert (ADDR_SPACE_GENERIC_P (addrspace)); | |
1186 | return Pmode; | |
1187 | } | |
1188 | ||
1189 | /* Named address space version of valid_pointer_mode. */ | |
1190 | ||
1191 | bool | |
1192 | default_addr_space_valid_pointer_mode (enum machine_mode mode, addr_space_t as) | |
1193 | { | |
1194 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1195 | return (mode == targetm.addr_space.pointer_mode (as) | |
1196 | || mode == targetm.addr_space.address_mode (as)); | |
1197 | ||
1198 | return targetm.valid_pointer_mode (mode); | |
1199 | } | |
1200 | ||
1201 | /* Some places still assume that all pointer or address modes are the | |
1202 | standard Pmode and ptr_mode. These optimizations become invalid if | |
1203 | the target actually supports multiple different modes. For now, | |
1204 | we disable such optimizations on such targets, using this function. */ | |
1205 | ||
1206 | bool | |
1207 | target_default_pointer_address_modes_p (void) | |
1208 | { | |
1209 | if (targetm.addr_space.address_mode != default_addr_space_address_mode) | |
1210 | return false; | |
1211 | if (targetm.addr_space.pointer_mode != default_addr_space_pointer_mode) | |
1212 | return false; | |
1213 | ||
1214 | return true; | |
1215 | } | |
1216 | ||
09e881c9 BE |
1217 | /* Named address space version of legitimate_address_p. */ |
1218 | ||
1219 | bool | |
1220 | default_addr_space_legitimate_address_p (enum machine_mode mode, rtx mem, | |
1221 | bool strict, addr_space_t as) | |
1222 | { | |
1223 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1224 | gcc_unreachable (); | |
1225 | ||
1226 | return targetm.legitimate_address_p (mode, mem, strict); | |
1227 | } | |
1228 | ||
1229 | /* Named address space version of LEGITIMIZE_ADDRESS. */ | |
1230 | ||
1231 | rtx | |
1232 | default_addr_space_legitimize_address (rtx x, rtx oldx, | |
1233 | enum machine_mode mode, addr_space_t as) | |
1234 | { | |
1235 | if (!ADDR_SPACE_GENERIC_P (as)) | |
1236 | return x; | |
1237 | ||
1238 | return targetm.legitimize_address (x, oldx, mode); | |
1239 | } | |
1240 | ||
1241 | /* The default hook for determining if one named address space is a subset of | |
1242 | another and to return which address space to use as the common address | |
1243 | space. */ | |
1244 | ||
1245 | bool | |
1246 | default_addr_space_subset_p (addr_space_t subset, addr_space_t superset) | |
1247 | { | |
1248 | return (subset == superset); | |
1249 | } | |
1250 | ||
1251 | /* The default hook for TARGET_ADDR_SPACE_CONVERT. This hook should never be | |
1252 | called for targets with only a generic address space. */ | |
1253 | ||
1254 | rtx | |
1255 | default_addr_space_convert (rtx op ATTRIBUTE_UNUSED, | |
1256 | tree from_type ATTRIBUTE_UNUSED, | |
1257 | tree to_type ATTRIBUTE_UNUSED) | |
1258 | { | |
1259 | gcc_unreachable (); | |
1260 | } | |
1261 | ||
dbc42c44 AS |
1262 | bool |
1263 | default_hard_regno_scratch_ok (unsigned int regno ATTRIBUTE_UNUSED) | |
1264 | { | |
1265 | return true; | |
1266 | } | |
1267 | ||
cbda7dc6 AS |
1268 | /* The default implementation of TARGET_MODE_DEPENDENT_ADDRESS_P. */ |
1269 | ||
1270 | bool | |
5bfed9a9 GJL |
1271 | default_mode_dependent_address_p (const_rtx addr ATTRIBUTE_UNUSED, |
1272 | addr_space_t addrspace ATTRIBUTE_UNUSED) | |
cbda7dc6 | 1273 | { |
cbda7dc6 | 1274 | return false; |
cbda7dc6 AS |
1275 | } |
1276 | ||
ab442df7 MM |
1277 | bool |
1278 | default_target_option_valid_attribute_p (tree ARG_UNUSED (fndecl), | |
1279 | tree ARG_UNUSED (name), | |
1280 | tree ARG_UNUSED (args), | |
1281 | int ARG_UNUSED (flags)) | |
1282 | { | |
5779e713 MM |
1283 | warning (OPT_Wattributes, |
1284 | "target attribute is not supported on this machine"); | |
1285 | ||
1286 | return false; | |
1287 | } | |
1288 | ||
1289 | bool | |
1290 | default_target_option_pragma_parse (tree ARG_UNUSED (args), | |
1291 | tree ARG_UNUSED (pop_target)) | |
1292 | { | |
1293 | warning (OPT_Wpragmas, | |
1294 | "#pragma GCC target is not supported for this machine"); | |
1295 | ||
ab442df7 MM |
1296 | return false; |
1297 | } | |
1298 | ||
1299 | bool | |
5cec9f59 | 1300 | default_target_can_inline_p (tree caller, tree callee) |
ab442df7 MM |
1301 | { |
1302 | bool ret = false; | |
1303 | tree callee_opts = DECL_FUNCTION_SPECIFIC_TARGET (callee); | |
1304 | tree caller_opts = DECL_FUNCTION_SPECIFIC_TARGET (caller); | |
1305 | ||
1306 | /* If callee has no option attributes, then it is ok to inline */ | |
1307 | if (!callee_opts) | |
1308 | ret = true; | |
1309 | ||
1310 | /* If caller has no option attributes, but callee does then it is not ok to | |
1311 | inline */ | |
1312 | else if (!caller_opts) | |
1313 | ret = false; | |
1314 | ||
dd5a833e MS |
1315 | /* If both caller and callee have attributes, assume that if the |
1316 | pointer is different, the two functions have different target | |
1317 | options since build_target_option_node uses a hash table for the | |
1318 | options. */ | |
ab442df7 MM |
1319 | else |
1320 | ret = (callee_opts == caller_opts); | |
1321 | ||
1322 | return ret; | |
1323 | } | |
1324 | ||
e6ff3083 AS |
1325 | #ifndef HAVE_casesi |
1326 | # define HAVE_casesi 0 | |
1327 | #endif | |
1328 | ||
1329 | /* If the machine does not have a case insn that compares the bounds, | |
1330 | this means extra overhead for dispatch tables, which raises the | |
1331 | threshold for using them. */ | |
1332 | ||
0cd2402d SB |
1333 | unsigned int |
1334 | default_case_values_threshold (void) | |
e6ff3083 AS |
1335 | { |
1336 | return (HAVE_casesi ? 4 : 5); | |
1337 | } | |
1338 | ||
2929029c WG |
1339 | bool |
1340 | default_have_conditional_execution (void) | |
1341 | { | |
1342 | #ifdef HAVE_conditional_execution | |
1343 | return HAVE_conditional_execution; | |
1344 | #else | |
1345 | return false; | |
1346 | #endif | |
1347 | } | |
1348 | ||
9b2b7279 AM |
1349 | /* By default we assume that c99 functions are present at the runtime, |
1350 | but sincos is not. */ | |
1351 | bool | |
1352 | default_libc_has_function (enum function_class fn_class) | |
1353 | { | |
1354 | if (fn_class == function_c94 | |
1355 | || fn_class == function_c99_misc | |
1356 | || fn_class == function_c99_math_complex) | |
1357 | return true; | |
1358 | ||
1359 | return false; | |
1360 | } | |
1361 | ||
1362 | bool | |
1363 | gnu_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED) | |
1364 | { | |
1365 | return true; | |
1366 | } | |
1367 | ||
1368 | bool | |
1369 | no_c99_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED) | |
1370 | { | |
1371 | return false; | |
1372 | } | |
1373 | ||
0a35513e AH |
1374 | tree |
1375 | default_builtin_tm_load_store (tree ARG_UNUSED (type)) | |
1376 | { | |
1377 | return NULL_TREE; | |
1378 | } | |
1379 | ||
f5c21ef3 AS |
1380 | /* Compute cost of moving registers to/from memory. */ |
1381 | ||
1382 | int | |
1383 | default_memory_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, | |
a87cf97e | 1384 | reg_class_t rclass ATTRIBUTE_UNUSED, |
f5c21ef3 AS |
1385 | bool in ATTRIBUTE_UNUSED) |
1386 | { | |
1387 | #ifndef MEMORY_MOVE_COST | |
a87cf97e | 1388 | return (4 + memory_move_secondary_cost (mode, (enum reg_class) rclass, in)); |
f5c21ef3 | 1389 | #else |
a87cf97e | 1390 | return MEMORY_MOVE_COST (mode, (enum reg_class) rclass, in); |
f5c21ef3 AS |
1391 | #endif |
1392 | } | |
1393 | ||
de8f4b07 AS |
1394 | /* Compute cost of moving data from a register of class FROM to one of |
1395 | TO, using MODE. */ | |
1396 | ||
1397 | int | |
1398 | default_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, | |
a87cf97e JR |
1399 | reg_class_t from ATTRIBUTE_UNUSED, |
1400 | reg_class_t to ATTRIBUTE_UNUSED) | |
de8f4b07 AS |
1401 | { |
1402 | #ifndef REGISTER_MOVE_COST | |
1403 | return 2; | |
1404 | #else | |
a87cf97e | 1405 | return REGISTER_MOVE_COST (mode, (enum reg_class) from, (enum reg_class) to); |
de8f4b07 AS |
1406 | #endif |
1407 | } | |
1408 | ||
3c5273a9 KT |
1409 | bool |
1410 | default_profile_before_prologue (void) | |
1411 | { | |
1412 | #ifdef PROFILE_BEFORE_PROLOGUE | |
1413 | return true; | |
1414 | #else | |
1415 | return false; | |
1416 | #endif | |
1417 | } | |
1418 | ||
fba42e24 AS |
1419 | /* The default implementation of TARGET_PREFERRED_RELOAD_CLASS. */ |
1420 | ||
1421 | reg_class_t | |
1422 | default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, | |
1423 | reg_class_t rclass) | |
1424 | { | |
1425 | #ifdef PREFERRED_RELOAD_CLASS | |
1426 | return (reg_class_t) PREFERRED_RELOAD_CLASS (x, (enum reg_class) rclass); | |
1427 | #else | |
1428 | return rclass; | |
1429 | #endif | |
1430 | } | |
1431 | ||
abd26bfb AS |
1432 | /* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS. */ |
1433 | ||
1434 | reg_class_t | |
1435 | default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
1436 | reg_class_t rclass) | |
1437 | { | |
abd26bfb | 1438 | return rclass; |
abd26bfb AS |
1439 | } |
1440 | ||
5f286f4a YQ |
1441 | /* The default implementation of TARGET_PREFERRED_RENAME_CLASS. */ |
1442 | reg_class_t | |
1443 | default_preferred_rename_class (reg_class_t rclass ATTRIBUTE_UNUSED) | |
1444 | { | |
1445 | return NO_REGS; | |
1446 | } | |
1447 | ||
07b8f0a8 AS |
1448 | /* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P. */ |
1449 | ||
1450 | bool | |
1451 | default_class_likely_spilled_p (reg_class_t rclass) | |
1452 | { | |
07b8f0a8 | 1453 | return (reg_class_size[(int) rclass] == 1); |
07b8f0a8 AS |
1454 | } |
1455 | ||
a8c44c52 AS |
1456 | /* The default implementation of TARGET_CLASS_MAX_NREGS. */ |
1457 | ||
1458 | unsigned char | |
1459 | default_class_max_nregs (reg_class_t rclass ATTRIBUTE_UNUSED, | |
1460 | enum machine_mode mode ATTRIBUTE_UNUSED) | |
1461 | { | |
1462 | #ifdef CLASS_MAX_NREGS | |
1463 | return (unsigned char) CLASS_MAX_NREGS ((enum reg_class) rclass, mode); | |
1464 | #else | |
1465 | return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD); | |
1466 | #endif | |
1467 | } | |
1468 | ||
f0a0390e RH |
1469 | /* Determine the debugging unwind mechanism for the target. */ |
1470 | ||
1471 | enum unwind_info_type | |
1472 | default_debug_unwind_info (void) | |
1473 | { | |
1474 | /* If the target wants to force the use of dwarf2 unwind info, let it. */ | |
1475 | /* ??? Change all users to the hook, then poison this. */ | |
1476 | #ifdef DWARF2_FRAME_INFO | |
1477 | if (DWARF2_FRAME_INFO) | |
1478 | return UI_DWARF2; | |
1479 | #endif | |
1480 | ||
1481 | /* Otherwise, only turn it on if dwarf2 debugging is enabled. */ | |
1482 | #ifdef DWARF2_DEBUGGING_INFO | |
1483 | if (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) | |
1484 | return UI_DWARF2; | |
1485 | #endif | |
1486 | ||
1487 | return UI_NONE; | |
1488 | } | |
1489 | ||
ff050c66 MF |
1490 | /* Determine the correct mode for a Dwarf frame register that represents |
1491 | register REGNO. */ | |
1492 | ||
1493 | enum machine_mode | |
1494 | default_dwarf_frame_reg_mode (int regno) | |
1495 | { | |
1496 | enum machine_mode save_mode = reg_raw_mode[regno]; | |
1497 | ||
1498 | if (HARD_REGNO_CALL_PART_CLOBBERED (regno, save_mode)) | |
1499 | save_mode = choose_hard_reg_mode (regno, 1, true); | |
1500 | return save_mode; | |
1501 | } | |
1502 | ||
ffa88471 SE |
1503 | /* To be used by targets where reg_raw_mode doesn't return the right |
1504 | mode for registers used in apply_builtin_return and apply_builtin_arg. */ | |
1505 | ||
1506 | enum machine_mode | |
c3284718 | 1507 | default_get_reg_raw_mode (int regno) |
ffa88471 SE |
1508 | { |
1509 | return reg_raw_mode[regno]; | |
1510 | } | |
1511 | ||
d56a43a0 AK |
1512 | /* Return true if a leaf function should stay leaf even with profiling |
1513 | enabled. */ | |
1514 | ||
1515 | bool | |
1516 | default_keep_leaf_when_profiled () | |
1517 | { | |
1518 | return false; | |
1519 | } | |
1520 | ||
a803773f JM |
1521 | /* Return true if the state of option OPTION should be stored in PCH files |
1522 | and checked by default_pch_valid_p. Store the option's current state | |
1523 | in STATE if so. */ | |
1524 | ||
1525 | static inline bool | |
1526 | option_affects_pch_p (int option, struct cl_option_state *state) | |
1527 | { | |
1528 | if ((cl_options[option].flags & CL_TARGET) == 0) | |
1529 | return false; | |
212bfe71 JR |
1530 | if ((cl_options[option].flags & CL_PCH_IGNORE) != 0) |
1531 | return false; | |
a803773f JM |
1532 | if (option_flag_var (option, &global_options) == &target_flags) |
1533 | if (targetm.check_pch_target_flags) | |
1534 | return false; | |
1535 | return get_option_state (&global_options, option, state); | |
1536 | } | |
1537 | ||
1538 | /* Default version of get_pch_validity. | |
1539 | By default, every flag difference is fatal; that will be mostly right for | |
1540 | most targets, but completely right for very few. */ | |
1541 | ||
1542 | void * | |
1543 | default_get_pch_validity (size_t *sz) | |
1544 | { | |
1545 | struct cl_option_state state; | |
1546 | size_t i; | |
1547 | char *result, *r; | |
1548 | ||
1549 | *sz = 2; | |
1550 | if (targetm.check_pch_target_flags) | |
1551 | *sz += sizeof (target_flags); | |
1552 | for (i = 0; i < cl_options_count; i++) | |
1553 | if (option_affects_pch_p (i, &state)) | |
1554 | *sz += state.size; | |
1555 | ||
1556 | result = r = XNEWVEC (char, *sz); | |
1557 | r[0] = flag_pic; | |
1558 | r[1] = flag_pie; | |
1559 | r += 2; | |
1560 | if (targetm.check_pch_target_flags) | |
1561 | { | |
1562 | memcpy (r, &target_flags, sizeof (target_flags)); | |
1563 | r += sizeof (target_flags); | |
1564 | } | |
1565 | ||
1566 | for (i = 0; i < cl_options_count; i++) | |
1567 | if (option_affects_pch_p (i, &state)) | |
1568 | { | |
1569 | memcpy (r, state.data, state.size); | |
1570 | r += state.size; | |
1571 | } | |
1572 | ||
1573 | return result; | |
1574 | } | |
1575 | ||
1576 | /* Return a message which says that a PCH file was created with a different | |
1577 | setting of OPTION. */ | |
1578 | ||
1579 | static const char * | |
1580 | pch_option_mismatch (const char *option) | |
1581 | { | |
1582 | char *r; | |
1583 | ||
1584 | asprintf (&r, _("created and used with differing settings of '%s'"), option); | |
1585 | if (r == NULL) | |
1586 | return _("out of memory"); | |
1587 | return r; | |
1588 | } | |
1589 | ||
1590 | /* Default version of pch_valid_p. */ | |
1591 | ||
1592 | const char * | |
1593 | default_pch_valid_p (const void *data_p, size_t len) | |
1594 | { | |
1595 | struct cl_option_state state; | |
1596 | const char *data = (const char *)data_p; | |
1597 | size_t i; | |
1598 | ||
1599 | /* -fpic and -fpie also usually make a PCH invalid. */ | |
1600 | if (data[0] != flag_pic) | |
1601 | return _("created and used with different settings of -fpic"); | |
1602 | if (data[1] != flag_pie) | |
1603 | return _("created and used with different settings of -fpie"); | |
1604 | data += 2; | |
1605 | ||
1606 | /* Check target_flags. */ | |
1607 | if (targetm.check_pch_target_flags) | |
1608 | { | |
1609 | int tf; | |
1610 | const char *r; | |
1611 | ||
1612 | memcpy (&tf, data, sizeof (target_flags)); | |
1613 | data += sizeof (target_flags); | |
1614 | len -= sizeof (target_flags); | |
1615 | r = targetm.check_pch_target_flags (tf); | |
1616 | if (r != NULL) | |
1617 | return r; | |
1618 | } | |
1619 | ||
1620 | for (i = 0; i < cl_options_count; i++) | |
1621 | if (option_affects_pch_p (i, &state)) | |
1622 | { | |
1623 | if (memcmp (data, state.data, state.size) != 0) | |
1624 | return pch_option_mismatch (cl_options[i].opt_text); | |
1625 | data += state.size; | |
1626 | len -= state.size; | |
1627 | } | |
1628 | ||
1629 | return NULL; | |
1630 | } | |
1631 | ||
42e37616 DM |
1632 | /* Default version of cstore_mode. */ |
1633 | ||
1634 | enum machine_mode | |
1635 | default_cstore_mode (enum insn_code icode) | |
1636 | { | |
1637 | return insn_data[(int) icode].operand[0].mode; | |
1638 | } | |
1639 | ||
d9886a9e L |
1640 | /* Default version of member_type_forces_blk. */ |
1641 | ||
1642 | bool | |
1643 | default_member_type_forces_blk (const_tree, enum machine_mode) | |
1644 | { | |
1645 | return false; | |
1646 | } | |
1647 | ||
f236ac95 RB |
1648 | /* Default version of canonicalize_comparison. */ |
1649 | ||
1650 | void | |
1651 | default_canonicalize_comparison (int *, rtx *, rtx *, bool) | |
1652 | { | |
1653 | } | |
1654 | ||
267bac10 JM |
1655 | /* Default implementation of TARGET_ATOMIC_ASSIGN_EXPAND_FENV. */ |
1656 | ||
1657 | void | |
1658 | default_atomic_assign_expand_fenv (tree *, tree *, tree *) | |
1659 | { | |
1660 | } | |
1661 | ||
4a7cb16f AM |
1662 | #ifndef PAD_VARARGS_DOWN |
1663 | #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN | |
1664 | #endif | |
1665 | ||
1666 | /* Build an indirect-ref expression over the given TREE, which represents a | |
1667 | piece of a va_arg() expansion. */ | |
1668 | tree | |
1669 | build_va_arg_indirect_ref (tree addr) | |
1670 | { | |
1671 | addr = build_simple_mem_ref_loc (EXPR_LOCATION (addr), addr); | |
4a7cb16f AM |
1672 | return addr; |
1673 | } | |
1674 | ||
1675 | /* The "standard" implementation of va_arg: read the value from the | |
1676 | current (padded) address and increment by the (padded) size. */ | |
1677 | ||
1678 | tree | |
1679 | std_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, | |
1680 | gimple_seq *post_p) | |
1681 | { | |
1682 | tree addr, t, type_size, rounded_size, valist_tmp; | |
1683 | unsigned HOST_WIDE_INT align, boundary; | |
1684 | bool indirect; | |
1685 | ||
1686 | #ifdef ARGS_GROW_DOWNWARD | |
1687 | /* All of the alignment and movement below is for args-grow-up machines. | |
1688 | As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all | |
1689 | implement their own specialized gimplify_va_arg_expr routines. */ | |
1690 | gcc_unreachable (); | |
1691 | #endif | |
1692 | ||
1693 | indirect = pass_by_reference (NULL, TYPE_MODE (type), type, false); | |
1694 | if (indirect) | |
1695 | type = build_pointer_type (type); | |
1696 | ||
1697 | align = PARM_BOUNDARY / BITS_PER_UNIT; | |
1698 | boundary = targetm.calls.function_arg_boundary (TYPE_MODE (type), type); | |
1699 | ||
1700 | /* When we align parameter on stack for caller, if the parameter | |
1701 | alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be | |
1702 | aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee | |
1703 | here with caller. */ | |
1704 | if (boundary > MAX_SUPPORTED_STACK_ALIGNMENT) | |
1705 | boundary = MAX_SUPPORTED_STACK_ALIGNMENT; | |
1706 | ||
1707 | boundary /= BITS_PER_UNIT; | |
1708 | ||
1709 | /* Hoist the valist value into a temporary for the moment. */ | |
1710 | valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL); | |
1711 | ||
1712 | /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually | |
1713 | requires greater alignment, we must perform dynamic alignment. */ | |
1714 | if (boundary > align | |
1715 | && !integer_zerop (TYPE_SIZE (type))) | |
1716 | { | |
1717 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, | |
1718 | fold_build_pointer_plus_hwi (valist_tmp, boundary - 1)); | |
1719 | gimplify_and_add (t, pre_p); | |
1720 | ||
1721 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, | |
1722 | fold_build2 (BIT_AND_EXPR, TREE_TYPE (valist), | |
1723 | valist_tmp, | |
1724 | build_int_cst (TREE_TYPE (valist), -boundary))); | |
1725 | gimplify_and_add (t, pre_p); | |
1726 | } | |
1727 | else | |
1728 | boundary = align; | |
1729 | ||
1730 | /* If the actual alignment is less than the alignment of the type, | |
1731 | adjust the type accordingly so that we don't assume strict alignment | |
1732 | when dereferencing the pointer. */ | |
1733 | boundary *= BITS_PER_UNIT; | |
1734 | if (boundary < TYPE_ALIGN (type)) | |
1735 | { | |
1736 | type = build_variant_type_copy (type); | |
1737 | TYPE_ALIGN (type) = boundary; | |
1738 | } | |
1739 | ||
1740 | /* Compute the rounded size of the type. */ | |
1741 | type_size = size_in_bytes (type); | |
1742 | rounded_size = round_up (type_size, align); | |
1743 | ||
1744 | /* Reduce rounded_size so it's sharable with the postqueue. */ | |
1745 | gimplify_expr (&rounded_size, pre_p, post_p, is_gimple_val, fb_rvalue); | |
1746 | ||
1747 | /* Get AP. */ | |
1748 | addr = valist_tmp; | |
1749 | if (PAD_VARARGS_DOWN && !integer_zerop (rounded_size)) | |
1750 | { | |
1751 | /* Small args are padded downward. */ | |
1752 | t = fold_build2_loc (input_location, GT_EXPR, sizetype, | |
1753 | rounded_size, size_int (align)); | |
1754 | t = fold_build3 (COND_EXPR, sizetype, t, size_zero_node, | |
1755 | size_binop (MINUS_EXPR, rounded_size, type_size)); | |
1756 | addr = fold_build_pointer_plus (addr, t); | |
1757 | } | |
1758 | ||
1759 | /* Compute new value for AP. */ | |
1760 | t = fold_build_pointer_plus (valist_tmp, rounded_size); | |
1761 | t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist, t); | |
1762 | gimplify_and_add (t, pre_p); | |
1763 | ||
1764 | addr = fold_convert (build_pointer_type (type), addr); | |
1765 | ||
1766 | if (indirect) | |
1767 | addr = build_va_arg_indirect_ref (addr); | |
1768 | ||
1769 | return build_va_arg_indirect_ref (addr); | |
1770 | } | |
1771 | ||
1d0216c8 RS |
1772 | /* An implementation of TARGET_CAN_USE_DOLOOP_P for targets that do |
1773 | not support nested low-overhead loops. */ | |
1774 | ||
1775 | bool | |
807e902e | 1776 | can_use_doloop_if_innermost (const widest_int &, const widest_int &, |
1d0216c8 RS |
1777 | unsigned int loop_depth, bool) |
1778 | { | |
1779 | return loop_depth == 1; | |
1780 | } | |
4a7cb16f | 1781 | |
7d69de61 | 1782 | #include "gt-targhooks.h" |