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38f8b050 | 1 | /* Target hook definitions. |
96e45421 JM |
2 | Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, |
3 | 2011 | |
38f8b050 JR |
4 | Free Software Foundation, Inc. |
5 | ||
6 | This program is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by the | |
8 | Free Software Foundation; either version 3, or (at your option) any | |
9 | later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. | |
19 | ||
20 | In other words, you are welcome to use, share and improve this program. | |
21 | You are forbidden to forbid anyone else to use, share and improve | |
22 | what you give them. Help stamp out software-hoarding! */ | |
23 | ||
acce4e77 JM |
24 | /* See target-hooks-macros.h for details of macros that should be |
25 | provided by the including file, and how to use them here. */ | |
26 | #include "target-hooks-macros.h" | |
38f8b050 | 27 | |
acce4e77 JM |
28 | #undef HOOK_TYPE |
29 | #define HOOK_TYPE "Target Hook" | |
38f8b050 | 30 | |
acce4e77 | 31 | HOOK_VECTOR (TARGET_INITIALIZER, gcc_target) |
38f8b050 JR |
32 | |
33 | /* Functions that output assembler for the target. */ | |
34 | #define HOOK_PREFIX "TARGET_ASM_" | |
35 | HOOK_VECTOR (TARGET_ASM_OUT, asm_out) | |
36 | ||
37 | /* Opening and closing parentheses for asm expression grouping. */ | |
38 | DEFHOOKPOD | |
39 | (open_paren, | |
40 | "", | |
41 | const char *, "(") | |
42 | DEFHOOKPODX (close_paren, const char *, ")") | |
43 | ||
44 | /* Assembler instructions for creating various kinds of integer object. */ | |
45 | DEFHOOKPOD | |
46 | (byte_op, | |
47 | "", | |
48 | const char *, "\t.byte\t") | |
49 | DEFHOOKPOD (aligned_op, "*", struct asm_int_op, TARGET_ASM_ALIGNED_INT_OP) | |
50 | DEFHOOKPOD (unaligned_op, "*", struct asm_int_op, TARGET_ASM_UNALIGNED_INT_OP) | |
51 | ||
ad0c4c36 DD |
52 | /* The maximum number of bytes to skip when applying |
53 | LABEL_ALIGN_AFTER_BARRIER. */ | |
54 | DEFHOOK | |
55 | (label_align_after_barrier_max_skip, | |
56 | "", | |
57 | int, (rtx label), | |
58 | default_label_align_after_barrier_max_skip) | |
59 | ||
60 | /* The maximum number of bytes to skip when applying | |
61 | LOOP_ALIGN. */ | |
62 | DEFHOOK | |
63 | (loop_align_max_skip, | |
64 | "", | |
65 | int, (rtx label), | |
66 | default_loop_align_max_skip) | |
67 | ||
68 | /* The maximum number of bytes to skip when applying | |
69 | LABEL_ALIGN. */ | |
70 | DEFHOOK | |
71 | (label_align_max_skip, | |
72 | "", | |
73 | int, (rtx label), | |
74 | default_label_align_max_skip) | |
75 | ||
76 | /* The maximum number of bytes to skip when applying | |
77 | JUMP_ALIGN. */ | |
78 | DEFHOOK | |
79 | (jump_align_max_skip, | |
80 | "", | |
81 | int, (rtx label), | |
82 | default_jump_align_max_skip) | |
83 | ||
38f8b050 JR |
84 | /* Try to output the assembler code for an integer object whose |
85 | value is given by X. SIZE is the size of the object in bytes and | |
86 | ALIGNED_P indicates whether it is aligned. Return true if | |
87 | successful. Only handles cases for which BYTE_OP, ALIGNED_OP | |
88 | and UNALIGNED_OP are NULL. */ | |
89 | DEFHOOK | |
90 | (integer, | |
91 | "", | |
92 | /* Only handles cases for which BYTE_OP, ALIGNED_OP and UNALIGNED_OP are | |
93 | NULL. */ | |
94 | bool, (rtx x, unsigned int size, int aligned_p), | |
95 | default_assemble_integer) | |
96 | ||
97 | /* Output code that will globalize a label. */ | |
98 | DEFHOOK | |
99 | (globalize_label, | |
100 | "", | |
101 | void, (FILE *stream, const char *name), | |
102 | default_globalize_label) | |
103 | ||
104 | /* Output code that will globalize a declaration. */ | |
105 | DEFHOOK | |
106 | (globalize_decl_name, | |
107 | "", | |
108 | void, (FILE *stream, tree decl), default_globalize_decl_name) | |
109 | ||
110 | /* Output code that will emit a label for unwind info, if this | |
111 | target requires such labels. Second argument is the decl the | |
112 | unwind info is associated with, third is a boolean: true if | |
113 | this is for exception handling, fourth is a boolean: true if | |
114 | this is only a placeholder for an omitted FDE. */ | |
115 | DEFHOOK | |
116 | (emit_unwind_label, | |
117 | "", | |
118 | void, (FILE *stream, tree decl, int for_eh, int empty), | |
119 | default_emit_unwind_label) | |
120 | ||
121 | /* Output code that will emit a label to divide up the exception table. */ | |
122 | DEFHOOK | |
123 | (emit_except_table_label, | |
124 | "", | |
125 | void, (FILE *stream), | |
126 | default_emit_except_table_label) | |
127 | ||
a68b5e52 RH |
128 | /* Emit a directive for setting the personality for the function. */ |
129 | DEFHOOK | |
130 | (emit_except_personality, | |
131 | "If the target implements @code{TARGET_ASM_UNWIND_EMIT}, this hook may be\ | |
132 | used to emit a directive to install a personality hook into the unwind\ | |
133 | info. This hook should not be used if dwarf2 unwind info is used.", | |
134 | void, (rtx personality), | |
135 | NULL) | |
136 | ||
38f8b050 JR |
137 | /* Emit any directives required to unwind this instruction. */ |
138 | DEFHOOK | |
139 | (unwind_emit, | |
140 | "", | |
141 | void, (FILE *stream, rtx insn), | |
2784ed9c | 142 | NULL) |
38f8b050 | 143 | |
3bc6b3e6 RH |
144 | DEFHOOKPOD |
145 | (unwind_emit_before_insn, | |
146 | "True if the @code{TARGET_ASM_UNWIND_EMIT} hook should be called before\ | |
147 | the assembly for @var{insn} has been emitted, false if the hook should\ | |
148 | be called afterward.", | |
149 | bool, true) | |
150 | ||
4ee3b013 JR |
151 | /* Generate an internal label. |
152 | For now this is just a wrapper for ASM_GENERATE_INTERNAL_LABEL. */ | |
153 | DEFHOOK_UNDOC | |
154 | (generate_internal_label, | |
155 | "", | |
156 | void, (char *buf, const char *prefix, unsigned long labelno), | |
157 | default_generate_internal_label) | |
158 | ||
38f8b050 JR |
159 | /* Output an internal label. */ |
160 | DEFHOOK | |
161 | (internal_label, | |
162 | "", | |
163 | void, (FILE *stream, const char *prefix, unsigned long labelno), | |
164 | default_internal_label) | |
165 | ||
166 | /* Output label for the constant. */ | |
ad78130c | 167 | DEFHOOK |
38f8b050 JR |
168 | (declare_constant_name, |
169 | "", | |
ad78130c | 170 | void, (FILE *file, const char *name, const_tree expr, HOST_WIDE_INT size), |
38f8b050 JR |
171 | default_asm_declare_constant_name) |
172 | ||
173 | /* Emit a ttype table reference to a typeinfo object. */ | |
174 | DEFHOOK | |
175 | (ttype, | |
176 | "", | |
177 | bool, (rtx sym), | |
178 | hook_bool_rtx_false) | |
179 | ||
180 | /* Emit an assembler directive to set visibility for the symbol | |
181 | associated with the tree decl. */ | |
182 | DEFHOOK | |
183 | (assemble_visibility, | |
184 | "", | |
185 | void, (tree decl, int visibility), | |
186 | default_assemble_visibility) | |
187 | ||
188 | /* Output the assembler code for entry to a function. */ | |
189 | DEFHOOK | |
190 | (function_prologue, | |
191 | "", | |
192 | void, (FILE *file, HOST_WIDE_INT size), | |
193 | default_function_pro_epilogue) | |
194 | ||
195 | /* Output the assembler code for end of prologue. */ | |
196 | DEFHOOK | |
197 | (function_end_prologue, | |
198 | "", | |
199 | void, (FILE *file), | |
200 | no_asm_to_stream) | |
201 | ||
202 | /* Output the assembler code for start of epilogue. */ | |
203 | DEFHOOK | |
204 | (function_begin_epilogue, | |
205 | "", | |
206 | void, (FILE *file), | |
207 | no_asm_to_stream) | |
208 | ||
209 | /* Output the assembler code for function exit. */ | |
210 | DEFHOOK | |
211 | (function_epilogue, | |
212 | "", | |
213 | void, (FILE *file, HOST_WIDE_INT size), | |
214 | default_function_pro_epilogue) | |
215 | ||
216 | /* Initialize target-specific sections. */ | |
217 | DEFHOOK | |
218 | (init_sections, | |
219 | "", | |
220 | void, (void), | |
221 | hook_void_void) | |
222 | ||
223 | /* Tell assembler to change to section NAME with attributes FLAGS. | |
224 | If DECL is non-NULL, it is the VAR_DECL or FUNCTION_DECL with | |
225 | which this section is associated. */ | |
226 | DEFHOOK | |
227 | (named_section, | |
228 | "", | |
229 | void, (const char *name, unsigned int flags, tree decl), | |
230 | default_no_named_section) | |
231 | ||
f16d3f39 JH |
232 | /* Return preferred text (sub)section for function DECL. |
233 | Main purpose of this function is to separate cold, normal and hot | |
234 | functions. STARTUP is true when function is known to be used only | |
235 | at startup (from static constructors or it is main()). | |
236 | EXIT is true when function is known to be used only at exit | |
237 | (from static destructors). | |
238 | Return NULL if function should go to default text section. */ | |
239 | DEFHOOK | |
240 | (function_section, | |
241 | "", | |
242 | section *, (tree decl, enum node_frequency freq, bool startup, bool exit), | |
243 | default_function_section) | |
244 | ||
14d11d40 IS |
245 | /* Output the assembler code for function exit. */ |
246 | DEFHOOK | |
247 | (function_switched_text_sections, | |
248 | "Used by the target to emit any assembler directives or additional\ | |
249 | labels needed when a function is partitioned between different\ | |
250 | sections. Output should be written to @var{file}. The function\ | |
251 | decl is available as @var{decl} and the new section is `cold' if\ | |
252 | @var{new_is_cold} is @code{true}.", | |
253 | void, (FILE *file, tree decl, bool new_is_cold), | |
254 | default_function_switched_text_sections) | |
255 | ||
38f8b050 JR |
256 | /* Return a mask describing how relocations should be treated when |
257 | selecting sections. Bit 1 should be set if global relocations | |
258 | should be placed in a read-write section; bit 0 should be set if | |
259 | local relocations should be placed in a read-write section. */ | |
260 | DEFHOOK | |
261 | (reloc_rw_mask, | |
262 | "", | |
263 | int, (void), | |
264 | default_reloc_rw_mask) | |
265 | ||
266 | /* Return a section for EXP. It may be a DECL or a constant. RELOC | |
267 | is nonzero if runtime relocations must be applied; bit 1 will be | |
268 | set if the runtime relocations require non-local name resolution. | |
269 | ALIGN is the required alignment of the data. */ | |
270 | DEFHOOK | |
271 | (select_section, | |
272 | "", | |
273 | section *, (tree exp, int reloc, unsigned HOST_WIDE_INT align), | |
274 | default_select_section) | |
275 | ||
276 | /* Return a section for X. MODE is X's mode and ALIGN is its | |
277 | alignment in bits. */ | |
278 | DEFHOOK | |
279 | (select_rtx_section, | |
280 | "", | |
281 | section *, (enum machine_mode mode, rtx x, unsigned HOST_WIDE_INT align), | |
282 | default_select_rtx_section) | |
283 | ||
284 | /* Select a unique section name for DECL. RELOC is the same as | |
285 | for SELECT_SECTION. */ | |
286 | DEFHOOK | |
287 | (unique_section, | |
288 | "", | |
289 | void, (tree decl, int reloc), | |
290 | default_unique_section) | |
291 | ||
292 | /* Return the readonly data section associated with function DECL. */ | |
293 | DEFHOOK | |
294 | (function_rodata_section, | |
295 | "", | |
296 | section *, (tree decl), | |
297 | default_function_rodata_section) | |
298 | ||
299 | /* Output a constructor for a symbol with a given priority. */ | |
300 | DEFHOOK | |
301 | (constructor, | |
302 | "", | |
303 | void, (rtx symbol, int priority), NULL) | |
304 | ||
305 | /* Output a destructor for a symbol with a given priority. */ | |
306 | DEFHOOK | |
307 | (destructor, | |
308 | "", | |
309 | void, (rtx symbol, int priority), NULL) | |
310 | ||
311 | /* Output the assembler code for a thunk function. THUNK_DECL is the | |
312 | declaration for the thunk function itself, FUNCTION is the decl for | |
313 | the target function. DELTA is an immediate constant offset to be | |
314 | added to THIS. If VCALL_OFFSET is nonzero, the word at | |
315 | *(*this + vcall_offset) should be added to THIS. */ | |
316 | DEFHOOK | |
317 | (output_mi_thunk, | |
318 | "", | |
319 | void, (FILE *file, tree thunk_fndecl, HOST_WIDE_INT delta, | |
320 | HOST_WIDE_INT vcall_offset, tree function), | |
321 | NULL) | |
322 | ||
323 | /* Determine whether output_mi_thunk would succeed. */ | |
324 | /* ??? Ideally, this hook would not exist, and success or failure | |
325 | would be returned from output_mi_thunk directly. But there's | |
326 | too much undo-able setup involved in invoking output_mi_thunk. | |
327 | Could be fixed by making output_mi_thunk emit rtl instead of | |
328 | text to the output file. */ | |
329 | DEFHOOK | |
330 | (can_output_mi_thunk, | |
331 | "", | |
332 | bool, (const_tree thunk_fndecl, HOST_WIDE_INT delta, | |
333 | HOST_WIDE_INT vcall_offset, const_tree function), | |
334 | hook_bool_const_tree_hwi_hwi_const_tree_false) | |
335 | ||
336 | /* Output any boilerplate text needed at the beginning of a | |
337 | translation unit. */ | |
338 | DEFHOOK | |
339 | (file_start, | |
340 | "", | |
341 | void, (void), | |
342 | default_file_start) | |
343 | ||
344 | /* Output any boilerplate text needed at the end of a translation unit. */ | |
345 | DEFHOOK | |
346 | (file_end, | |
347 | "", | |
348 | void, (void), | |
349 | hook_void_void) | |
350 | ||
351 | /* Output any boilerplate text needed at the beginning of an | |
352 | LTO output stream. */ | |
353 | DEFHOOK | |
354 | (lto_start, | |
355 | "", | |
356 | void, (void), | |
357 | hook_void_void) | |
358 | ||
359 | /* Output any boilerplate text needed at the end of an | |
360 | LTO output stream. */ | |
361 | DEFHOOK | |
362 | (lto_end, | |
363 | "", | |
364 | void, (void), | |
365 | hook_void_void) | |
366 | ||
367 | /* Output any boilerplace text needed at the end of a | |
368 | translation unit before debug and unwind info is emitted. */ | |
369 | DEFHOOK | |
370 | (code_end, | |
371 | "", | |
372 | void, (void), | |
373 | hook_void_void) | |
374 | ||
375 | /* Output an assembler pseudo-op to declare a library function name | |
376 | external. */ | |
377 | DEFHOOK | |
378 | (external_libcall, | |
379 | "", | |
380 | void, (rtx symref), | |
381 | default_external_libcall) | |
382 | ||
383 | /* Output an assembler directive to mark decl live. This instructs | |
384 | linker to not dead code strip this symbol. */ | |
385 | DEFHOOK | |
386 | (mark_decl_preserved, | |
387 | "", | |
388 | void, (const char *symbol), | |
389 | hook_void_constcharptr) | |
390 | ||
391 | /* Output a record of the command line switches that have been passed. */ | |
392 | DEFHOOK | |
393 | (record_gcc_switches, | |
394 | "", | |
395 | int, (print_switch_type type, const char *text), | |
396 | NULL) | |
397 | ||
398 | /* The name of the section that the example ELF implementation of | |
399 | record_gcc_switches will use to store the information. Target | |
400 | specific versions of record_gcc_switches may or may not use | |
401 | this information. */ | |
402 | DEFHOOKPOD | |
403 | (record_gcc_switches_section, | |
404 | "", | |
405 | const char *, ".GCC.command.line") | |
406 | ||
407 | /* Output the definition of a section anchor. */ | |
408 | DEFHOOK | |
409 | (output_anchor, | |
410 | "", | |
411 | void, (rtx x), | |
412 | default_asm_output_anchor) | |
413 | ||
414 | /* Output a DTP-relative reference to a TLS symbol. */ | |
415 | DEFHOOK | |
416 | (output_dwarf_dtprel, | |
417 | "", | |
418 | void, (FILE *file, int size, rtx x), | |
419 | NULL) | |
420 | ||
421 | /* Some target machines need to postscan each insn after it is output. */ | |
422 | DEFHOOK | |
423 | (final_postscan_insn, | |
424 | "", | |
425 | void, (FILE *file, rtx insn, rtx *opvec, int noperands), | |
426 | NULL) | |
427 | ||
428 | /* Emit the trampoline template. This hook may be NULL. */ | |
429 | DEFHOOK | |
430 | (trampoline_template, | |
431 | "", | |
432 | void, (FILE *f), | |
433 | NULL) | |
434 | ||
b5f5d41d AS |
435 | DEFHOOK |
436 | (output_source_filename, | |
437 | "Output COFF information or DWARF debugging information which indicates\ | |
438 | that filename @var{name} is the current source file to the stdio\ | |
439 | stream @var{file}.\n\ | |
440 | \n\ | |
441 | This target hook need not be defined if the standard form of output\ | |
442 | for the file format in use is appropriate.", | |
443 | void ,(FILE *file, const char *name), | |
444 | default_asm_output_source_filename) | |
445 | ||
6cbd8875 AS |
446 | DEFHOOK |
447 | (output_addr_const_extra, | |
448 | "", | |
449 | bool, (FILE *file, rtx x), | |
450 | default_asm_output_addr_const_extra) | |
451 | ||
38f8b050 JR |
452 | /* ??? The TARGET_PRINT_OPERAND* hooks are part of the asm_out struct, |
453 | even though that is not reflected in the macro name to override their | |
454 | initializers. */ | |
455 | #undef HOOK_PREFIX | |
456 | #define HOOK_PREFIX "TARGET_" | |
457 | ||
458 | /* Emit a machine-specific insn operand. */ | |
4d00d5dd JR |
459 | /* ??? tm.texi only documents the old macro PRINT_OPERAND, |
460 | not this hook, and uses a different name for the argument FILE. */ | |
38f8b050 JR |
461 | DEFHOOK_UNDOC |
462 | (print_operand, | |
463 | "", | |
464 | void, (FILE *file, rtx x, int code), | |
465 | default_print_operand) | |
466 | ||
467 | /* Emit a machine-specific memory address. */ | |
4d00d5dd JR |
468 | /* ??? tm.texi only documents the old macro PRINT_OPERAND_ADDRESS, |
469 | not this hook, and uses different argument names. */ | |
38f8b050 JR |
470 | DEFHOOK_UNDOC |
471 | (print_operand_address, | |
472 | "", | |
473 | void, (FILE *file, rtx addr), | |
474 | default_print_operand_address) | |
475 | ||
476 | /* Determine whether CODE is a valid punctuation character for the | |
477 | `print_operand' hook. */ | |
4d00d5dd JR |
478 | /* ??? tm.texi only documents the old macro PRINT_OPERAND_PUNCT_VALID_P, |
479 | not this hook. */ | |
38f8b050 JR |
480 | DEFHOOK_UNDOC |
481 | (print_operand_punct_valid_p, | |
482 | "", | |
483 | bool ,(unsigned char code), | |
484 | default_print_operand_punct_valid_p) | |
485 | ||
77754180 DK |
486 | /* Given a symbol name, perform same mangling as assemble_name and |
487 | ASM_OUTPUT_LABELREF, returning result as an IDENTIFIER_NODE. */ | |
488 | DEFHOOK | |
489 | (mangle_assembler_name, | |
490 | "Given a symbol @var{name}, perform same mangling as @code{varasm.c}'s\ | |
491 | @code{assemble_name}, but in memory rather than to a file stream, returning\ | |
492 | result as an @code{IDENTIFIER_NODE}. Required for correct LTO symtabs. The\ | |
493 | default implementation calls the @code{TARGET_STRIP_NAME_ENCODING} hook and\ | |
494 | then prepends the @code{USER_LABEL_PREFIX}, if any.", | |
495 | tree, (const char *name), | |
496 | default_mangle_assembler_name) | |
497 | ||
38f8b050 JR |
498 | HOOK_VECTOR_END (asm_out) |
499 | ||
500 | /* Functions relating to instruction scheduling. All of these | |
501 | default to null pointers, which haifa-sched.c looks for and handles. */ | |
502 | #undef HOOK_PREFIX | |
503 | #define HOOK_PREFIX "TARGET_SCHED_" | |
504 | HOOK_VECTOR (TARGET_SCHED, sched) | |
505 | ||
506 | /* Given the current cost, COST, of an insn, INSN, calculate and | |
507 | return a new cost based on its relationship to DEP_INSN through | |
508 | the dependence LINK. The default is to make no adjustment. */ | |
509 | DEFHOOK | |
510 | (adjust_cost, | |
511 | "", | |
512 | int, (rtx insn, rtx link, rtx dep_insn, int cost), NULL) | |
513 | ||
514 | /* Adjust the priority of an insn as you see fit. Returns the new priority. */ | |
515 | DEFHOOK | |
516 | (adjust_priority, | |
517 | "", | |
518 | int, (rtx insn, int priority), NULL) | |
519 | ||
520 | /* Function which returns the maximum number of insns that can be | |
521 | scheduled in the same machine cycle. This must be constant | |
522 | over an entire compilation. The default is 1. */ | |
523 | DEFHOOK | |
524 | (issue_rate, | |
525 | "", | |
526 | int, (void), NULL) | |
527 | ||
528 | /* Calculate how much this insn affects how many more insns we | |
529 | can emit this cycle. Default is they all cost the same. */ | |
530 | DEFHOOK | |
531 | (variable_issue, | |
532 | "", | |
533 | int, (FILE *file, int verbose, rtx insn, int more), NULL) | |
534 | ||
535 | /* Initialize machine-dependent scheduling code. */ | |
536 | DEFHOOK | |
537 | (init, | |
538 | "", | |
539 | void, (FILE *file, int verbose, int max_ready), NULL) | |
540 | ||
541 | /* Finalize machine-dependent scheduling code. */ | |
542 | DEFHOOK | |
543 | (finish, | |
544 | "", | |
545 | void, (FILE *file, int verbose), NULL) | |
546 | ||
547 | /* Initialize machine-dependent function wide scheduling code. */ | |
548 | DEFHOOK | |
549 | (init_global, | |
550 | "", | |
551 | void, (FILE *file, int verbose, int old_max_uid), NULL) | |
552 | ||
553 | /* Finalize machine-dependent function wide scheduling code. */ | |
554 | DEFHOOK | |
555 | (finish_global, | |
556 | "", | |
557 | void, (FILE *file, int verbose), NULL) | |
558 | ||
559 | /* Reorder insns in a machine-dependent fashion, in two different | |
560 | places. Default does nothing. */ | |
561 | DEFHOOK | |
562 | (reorder, | |
563 | "", | |
564 | int, (FILE *file, int verbose, rtx *ready, int *n_readyp, int clock), NULL) | |
565 | ||
566 | DEFHOOK | |
567 | (reorder2, | |
568 | "", | |
569 | int, (FILE *file, int verbose, rtx *ready, int *n_readyp, int clock), NULL) | |
570 | ||
571 | /* The following member value is a pointer to a function called | |
572 | after evaluation forward dependencies of insns in chain given | |
573 | by two parameter values (head and tail correspondingly). */ | |
574 | DEFHOOK | |
575 | (dependencies_evaluation_hook, | |
576 | "", | |
577 | void, (rtx head, rtx tail), NULL) | |
578 | ||
579 | /* The values of the following four members are pointers to functions | |
580 | used to simplify the automaton descriptions. dfa_pre_cycle_insn and | |
581 | dfa_post_cycle_insn give functions returning insns which are used to | |
582 | change the pipeline hazard recognizer state when the new simulated | |
583 | processor cycle correspondingly starts and finishes. The function | |
584 | defined by init_dfa_pre_cycle_insn and init_dfa_post_cycle_insn are | |
585 | used to initialize the corresponding insns. The default values of | |
586 | the members result in not changing the automaton state when the | |
587 | new simulated processor cycle correspondingly starts and finishes. */ | |
588 | ||
589 | DEFHOOK | |
590 | (init_dfa_pre_cycle_insn, | |
591 | "", | |
592 | void, (void), NULL) | |
593 | ||
594 | DEFHOOK | |
595 | (dfa_pre_cycle_insn, | |
596 | "", | |
597 | rtx, (void), NULL) | |
598 | ||
599 | DEFHOOK | |
600 | (init_dfa_post_cycle_insn, | |
601 | "", | |
602 | void, (void), NULL) | |
603 | ||
604 | DEFHOOK | |
605 | (dfa_post_cycle_insn, | |
606 | "", | |
607 | rtx, (void), NULL) | |
608 | ||
609 | /* The values of the following two members are pointers to | |
610 | functions used to simplify the automaton descriptions. | |
611 | dfa_pre_advance_cycle and dfa_post_advance_cycle are getting called | |
612 | immediately before and after cycle is advanced. */ | |
613 | ||
614 | DEFHOOK | |
615 | (dfa_pre_advance_cycle, | |
616 | "", | |
617 | void, (void), NULL) | |
618 | ||
619 | DEFHOOK | |
620 | (dfa_post_advance_cycle, | |
621 | "", | |
622 | void, (void), NULL) | |
623 | ||
624 | /* The following member value is a pointer to a function returning value | |
625 | which defines how many insns in queue `ready' will we try for | |
626 | multi-pass scheduling. If the member value is nonzero and the | |
627 | function returns positive value, the DFA based scheduler will make | |
628 | multi-pass scheduling for the first cycle. In other words, we will | |
629 | try to choose ready insn which permits to start maximum number of | |
630 | insns on the same cycle. */ | |
631 | DEFHOOK | |
632 | (first_cycle_multipass_dfa_lookahead, | |
633 | "", | |
634 | int, (void), NULL) | |
635 | ||
636 | /* The following member value is pointer to a function controlling | |
637 | what insns from the ready insn queue will be considered for the | |
638 | multipass insn scheduling. If the hook returns zero for insn | |
639 | passed as the parameter, the insn will be not chosen to be issued. */ | |
640 | DEFHOOK | |
641 | (first_cycle_multipass_dfa_lookahead_guard, | |
642 | "", | |
643 | int, (rtx insn), NULL) | |
644 | ||
894fd6f2 MK |
645 | /* This hook prepares the target for a new round of multipass |
646 | scheduling. | |
647 | DATA is a pointer to target-specific data used for multipass scheduling. | |
648 | READY_TRY and N_READY represent the current state of search in the | |
649 | optimization space. The target can filter out instructions that | |
650 | should not be tried during current round by setting corresponding | |
651 | elements in READY_TRY to non-zero. | |
652 | FIRST_CYCLE_INSN_P is true if this is the first round of multipass | |
653 | scheduling on current cycle. */ | |
654 | DEFHOOK | |
655 | (first_cycle_multipass_begin, | |
656 | "", | |
657 | void, (void *data, char *ready_try, int n_ready, bool first_cycle_insn_p), | |
658 | NULL) | |
659 | ||
660 | /* This hook is called when multipass scheduling evaluates instruction INSN. | |
661 | DATA is a pointer to target-specific data that can be used to record effects | |
662 | of INSN on CPU that are not described in DFA. | |
663 | READY_TRY and N_READY represent the current state of search in the | |
664 | optimization space. The target can filter out instructions that | |
665 | should not be tried after issueing INSN by setting corresponding | |
666 | elements in READY_TRY to non-zero. | |
667 | INSN is the instruction being evaluated. | |
668 | PREV_DATA is a pointer to target-specific data corresponding | |
669 | to a state before issueing INSN. */ | |
670 | DEFHOOK | |
671 | (first_cycle_multipass_issue, | |
672 | "", | |
673 | void, (void *data, char *ready_try, int n_ready, rtx insn, | |
674 | const void *prev_data), NULL) | |
675 | ||
676 | /* This hook is called when multipass scheduling backtracks from evaluation of | |
677 | instruction corresponding to DATA. | |
678 | DATA is a pointer to target-specific data that stores the effects | |
679 | of instruction from which the algorithm backtracks on CPU that are not | |
680 | described in DFA. | |
681 | READY_TRY and N_READY represent the current state of search in the | |
682 | optimization space. The target can filter out instructions that | |
683 | should not be tried after issueing INSN by setting corresponding | |
684 | elements in READY_TRY to non-zero. */ | |
685 | DEFHOOK | |
686 | (first_cycle_multipass_backtrack, | |
687 | "", | |
688 | void, (const void *data, char *ready_try, int n_ready), NULL) | |
689 | ||
690 | /* This hook notifies the target about the result of the concluded current | |
691 | round of multipass scheduling. | |
692 | DATA is a pointer. | |
693 | If DATA is non-NULL it points to target-specific data used for multipass | |
694 | scheduling which corresponds to instruction at the start of the chain of | |
695 | the winning solution. DATA is NULL when multipass scheduling cannot find | |
696 | a good enough solution on current cycle and decides to retry later, | |
697 | usually after advancing the cycle count. */ | |
698 | DEFHOOK | |
699 | (first_cycle_multipass_end, | |
700 | "", | |
701 | void, (const void *data), NULL) | |
702 | ||
703 | /* This hook is called to initialize target-specific data for multipass | |
704 | scheduling after it has been allocated. | |
705 | DATA is a pointer to target-specific data that stores the effects | |
706 | of instruction from which the algorithm backtracks on CPU that are not | |
707 | described in DFA. */ | |
708 | DEFHOOK | |
709 | (first_cycle_multipass_init, | |
710 | "", | |
711 | void, (void *data), NULL) | |
712 | ||
713 | /* This hook is called to finalize target-specific data for multipass | |
714 | scheduling before it is deallocated. | |
715 | DATA is a pointer to target-specific data that stores the effects | |
716 | of instruction from which the algorithm backtracks on CPU that are not | |
717 | described in DFA. */ | |
718 | DEFHOOK | |
719 | (first_cycle_multipass_fini, | |
720 | "", | |
721 | void, (void *data), NULL) | |
722 | ||
38f8b050 JR |
723 | /* The following member value is pointer to a function called by |
724 | the insn scheduler before issuing insn passed as the third | |
725 | parameter on given cycle. If the hook returns nonzero, the | |
726 | insn is not issued on given processors cycle. Instead of that, | |
727 | the processor cycle is advanced. If the value passed through | |
728 | the last parameter is zero, the insn ready queue is not sorted | |
729 | on the new cycle start as usually. The first parameter passes | |
730 | file for debugging output. The second one passes the scheduler | |
731 | verbose level of the debugging output. The forth and the fifth | |
732 | parameter values are correspondingly processor cycle on which | |
733 | the previous insn has been issued and the current processor cycle. */ | |
c06bbdf7 | 734 | DEFHOOK |
38f8b050 JR |
735 | (dfa_new_cycle, |
736 | "", | |
c06bbdf7 JR |
737 | int, (FILE *dump, int verbose, rtx insn, int last_clock, |
738 | int clock, int *sort_p), | |
38f8b050 JR |
739 | NULL) |
740 | ||
741 | /* The following member value is a pointer to a function called by the | |
742 | insn scheduler. It should return true if there exists a dependence | |
743 | which is considered costly by the target, between the insn | |
744 | DEP_PRO (&_DEP), and the insn DEP_CON (&_DEP). The first parameter is | |
745 | the dep that represents the dependence between the two insns. The | |
746 | second argument is the cost of the dependence as estimated by | |
747 | the scheduler. The last argument is the distance in cycles | |
748 | between the already scheduled insn (first parameter) and the | |
749 | second insn (second parameter). */ | |
750 | DEFHOOK | |
751 | (is_costly_dependence, | |
752 | "", | |
753 | bool, (struct _dep *_dep, int cost, int distance), NULL) | |
754 | ||
755 | DEFHOOK_UNDOC | |
756 | (adjust_cost_2, | |
757 | "Given the current cost, @var{cost}, of an insn, @var{insn}, calculate and\ | |
758 | return a new cost based on its relationship to @var{dep_insn} through the\ | |
759 | dependence of weakness @var{dw}. The default is to make no adjustment.", | |
760 | int, (rtx insn, int dep_type1, rtx dep_insn, int cost, int dw), NULL) | |
761 | ||
762 | /* The following member value is a pointer to a function called | |
763 | by the insn scheduler. This hook is called to notify the backend | |
764 | that new instructions were emitted. */ | |
765 | DEFHOOK | |
766 | (h_i_d_extended, | |
767 | "", | |
768 | void, (void), NULL) | |
769 | ||
770 | /* Next 5 functions are for multi-point scheduling. */ | |
771 | ||
772 | /* Allocate memory for scheduler context. */ | |
773 | DEFHOOK | |
774 | (alloc_sched_context, | |
775 | "", | |
776 | void *, (void), NULL) | |
777 | ||
778 | /* Fills the context from the local machine scheduler context. */ | |
779 | DEFHOOK | |
780 | (init_sched_context, | |
781 | "", | |
782 | void, (void *tc, bool clean_p), NULL) | |
783 | ||
784 | /* Sets local machine scheduler context to a saved value. */ | |
785 | DEFHOOK | |
786 | (set_sched_context, | |
787 | "", | |
788 | void, (void *tc), NULL) | |
789 | ||
790 | /* Clears a scheduler context so it becomes like after init. */ | |
791 | DEFHOOK | |
792 | (clear_sched_context, | |
793 | "", | |
794 | void, (void *tc), NULL) | |
795 | ||
796 | /* Frees the scheduler context. */ | |
797 | DEFHOOK | |
798 | (free_sched_context, | |
799 | "", | |
800 | void, (void *tc), NULL) | |
801 | ||
802 | /* The following member value is a pointer to a function called | |
803 | by the insn scheduler. | |
804 | The first parameter is an instruction, the second parameter is the type | |
805 | of the requested speculation, and the third parameter is a pointer to the | |
806 | speculative pattern of the corresponding type (set if return value == 1). | |
807 | It should return | |
808 | -1, if there is no pattern, that will satisfy the requested speculation type, | |
809 | 0, if current pattern satisfies the requested speculation type, | |
810 | 1, if pattern of the instruction should be changed to the newly | |
811 | generated one. */ | |
812 | DEFHOOK | |
813 | (speculate_insn, | |
814 | "", | |
815 | int, (rtx insn, int request, rtx *new_pat), NULL) | |
816 | ||
817 | /* The following member value is a pointer to a function called | |
818 | by the insn scheduler. It should return true if the check instruction | |
819 | passed as the parameter needs a recovery block. */ | |
820 | DEFHOOK | |
821 | (needs_block_p, | |
822 | "", | |
823 | bool, (int dep_status), NULL) | |
824 | ||
825 | /* The following member value is a pointer to a function called | |
826 | by the insn scheduler. It should return a pattern for the check | |
827 | instruction. | |
828 | The first parameter is a speculative instruction, the second parameter | |
829 | is the label of the corresponding recovery block (or null, if it is a | |
830 | simple check). If the mutation of the check is requested (e.g. from | |
831 | ld.c to chk.a), the third parameter is true - in this case the first | |
832 | parameter is the previous check. */ | |
833 | DEFHOOK | |
834 | (gen_spec_check, | |
835 | "", | |
836 | rtx, (rtx insn, rtx label, int mutate_p), NULL) | |
837 | ||
838 | /* The following member value is a pointer to a function controlling | |
839 | what insns from the ready insn queue will be considered for the | |
840 | multipass insn scheduling. If the hook returns zero for the insn | |
841 | passed as the parameter, the insn will not be chosen to be | |
842 | issued. This hook is used to discard speculative instructions, | |
843 | that stand at the first position of the ready list. */ | |
844 | DEFHOOK | |
845 | (first_cycle_multipass_dfa_lookahead_guard_spec, | |
846 | "", | |
847 | bool, (const_rtx insn), NULL) | |
848 | ||
849 | /* The following member value is a pointer to a function that provides | |
850 | information about the speculation capabilities of the target. | |
851 | The parameter is a pointer to spec_info variable. */ | |
852 | DEFHOOK | |
853 | (set_sched_flags, | |
854 | "", | |
855 | void, (struct spec_info_def *spec_info), NULL) | |
856 | ||
857 | DEFHOOK_UNDOC | |
858 | (get_insn_spec_ds, | |
859 | "Return speculation types of instruction @var{insn}.", | |
860 | int, (rtx insn), NULL) | |
861 | ||
862 | DEFHOOK_UNDOC | |
863 | (get_insn_checked_ds, | |
864 | "Return speculation types that are checked for instruction @var{insn}", | |
865 | int, (rtx insn), NULL) | |
866 | ||
867 | DEFHOOK_UNDOC | |
868 | (skip_rtx_p, | |
869 | "Return bool if rtx scanning should just skip current layer and\ | |
870 | advance to the inner rtxes.", | |
871 | bool, (const_rtx x), NULL) | |
872 | ||
873 | /* The following member value is a pointer to a function that provides | |
874 | information about the target resource-based lower bound which is | |
875 | used by the swing modulo scheduler. The parameter is a pointer | |
876 | to ddg variable. */ | |
877 | DEFHOOK | |
878 | (sms_res_mii, | |
879 | "", | |
880 | int, (struct ddg *g), NULL) | |
881 | ||
7942e47e RY |
882 | /* The following member value is a function that initializes dispatch |
883 | schedling and adds instructions to dispatch window according to its | |
884 | parameters. */ | |
885 | DEFHOOK | |
886 | (dispatch_do, | |
887 | "", | |
888 | void, (rtx insn, int x), | |
889 | hook_void_rtx_int) | |
890 | ||
891 | /* The following member value is a a function that returns true is | |
892 | dispatch schedling is supported in hardware and condition passed | |
893 | as the second parameter is true. */ | |
894 | DEFHOOK | |
895 | (dispatch, | |
896 | "", | |
897 | bool, (rtx insn, int x), | |
898 | hook_bool_rtx_int_false) | |
899 | ||
b0bd15f7 BS |
900 | DEFHOOKPOD |
901 | (exposed_pipeline, | |
902 | "True if the processor has an exposed pipeline, which means that not just\n\ | |
903 | the order of instructions is important for correctness when scheduling, but\n\ | |
904 | also the latencies of operations.", | |
905 | bool, false) | |
906 | ||
38f8b050 JR |
907 | HOOK_VECTOR_END (sched) |
908 | ||
909 | /* Functions relating to vectorization. */ | |
910 | #undef HOOK_PREFIX | |
911 | #define HOOK_PREFIX "TARGET_VECTORIZE_" | |
912 | HOOK_VECTOR (TARGET_VECTORIZE, vectorize) | |
913 | ||
914 | /* The following member value is a pointer to a function called | |
915 | by the vectorizer, and return the decl of the target builtin | |
916 | function. */ | |
917 | DEFHOOK | |
918 | (builtin_mask_for_load, | |
919 | "", | |
920 | tree, (void), NULL) | |
921 | ||
922 | /* Returns a code for builtin that realizes vectorized version of | |
923 | function, or NULL_TREE if not available. */ | |
924 | DEFHOOK | |
925 | (builtin_vectorized_function, | |
926 | "", | |
927 | tree, (tree fndecl, tree vec_type_out, tree vec_type_in), | |
928 | default_builtin_vectorized_function) | |
929 | ||
930 | /* Returns a function declaration for a builtin that realizes the | |
931 | vector conversion, or NULL_TREE if not available. */ | |
932 | DEFHOOK | |
933 | (builtin_conversion, | |
934 | "", | |
935 | tree, (unsigned code, tree dest_type, tree src_type), | |
936 | default_builtin_vectorized_conversion) | |
937 | ||
938 | /* Target builtin that implements vector widening multiplication. | |
939 | builtin_mul_widen_eve computes the element-by-element products | |
940 | for the even elements, and builtin_mul_widen_odd computes the | |
941 | element-by-element products for the odd elements. */ | |
942 | DEFHOOK | |
943 | (builtin_mul_widen_even, | |
944 | "", | |
945 | tree, (tree x), NULL) | |
946 | ||
947 | DEFHOOK | |
948 | (builtin_mul_widen_odd, | |
949 | "", | |
950 | tree, (tree x), NULL) | |
951 | ||
720f5239 IR |
952 | /* Cost of different vector/scalar statements in vectorization cost |
953 | model. In case of misaligned vector loads and stores the cost depends | |
954 | on the data type and misalignment value. */ | |
38f8b050 JR |
955 | DEFHOOK |
956 | (builtin_vectorization_cost, | |
957 | "", | |
720f5239 | 958 | int, (enum vect_cost_for_stmt type_of_cost, tree vectype, int misalign), |
38f8b050 JR |
959 | default_builtin_vectorization_cost) |
960 | ||
961 | /* Return true if vector alignment is reachable (by peeling N | |
962 | iterations) for the given type. */ | |
963 | DEFHOOK | |
964 | (vector_alignment_reachable, | |
965 | "", | |
966 | bool, (const_tree type, bool is_packed), | |
967 | default_builtin_vector_alignment_reachable) | |
968 | ||
969 | /* Target builtin that implements vector permute. */ | |
970 | DEFHOOK | |
971 | (builtin_vec_perm, | |
972 | "", | |
973 | tree, (tree type, tree *mask_element_type), NULL) | |
974 | ||
975 | /* Return true if a vector created for builtin_vec_perm is valid. */ | |
976 | DEFHOOK | |
977 | (builtin_vec_perm_ok, | |
978 | "", | |
979 | bool, (tree vec_type, tree mask), | |
980 | hook_bool_tree_tree_true) | |
981 | ||
982 | /* Return true if the target supports misaligned store/load of a | |
983 | specific factor denoted in the third parameter. The last parameter | |
984 | is true if the access is defined in a packed struct. */ | |
985 | DEFHOOK | |
986 | (support_vector_misalignment, | |
987 | "", | |
988 | bool, | |
989 | (enum machine_mode mode, const_tree type, int misalignment, bool is_packed), | |
990 | default_builtin_support_vector_misalignment) | |
991 | ||
cc4b5170 RG |
992 | /* Returns the preferred mode for SIMD operations for the specified |
993 | scalar mode. */ | |
26983c22 | 994 | DEFHOOK |
cc4b5170 | 995 | (preferred_simd_mode, |
26983c22 | 996 | "", |
cc4b5170 | 997 | enum machine_mode, |
26983c22 | 998 | (enum machine_mode mode), |
cc4b5170 | 999 | default_preferred_simd_mode) |
26983c22 | 1000 | |
767f865f RG |
1001 | /* Returns a mask of vector sizes to iterate over when auto-vectorizing |
1002 | after processing the preferred one derived from preferred_simd_mode. */ | |
1003 | DEFHOOK | |
1004 | (autovectorize_vector_sizes, | |
1005 | "", | |
1006 | unsigned int, | |
1007 | (void), | |
1008 | default_autovectorize_vector_sizes) | |
1009 | ||
38f8b050 JR |
1010 | HOOK_VECTOR_END (vectorize) |
1011 | ||
1012 | #undef HOOK_PREFIX | |
1013 | #define HOOK_PREFIX "TARGET_" | |
1014 | ||
38f8b050 JR |
1015 | /* Allow target specific overriding of option settings after options have |
1016 | been changed by an attribute or pragma or when it is reset at the | |
1017 | end of the code affected by an attribute or pragma. */ | |
1018 | DEFHOOK | |
1019 | (override_options_after_change, | |
1020 | "", | |
1021 | void, (void), | |
1022 | hook_void_void) | |
1023 | ||
38f8b050 JR |
1024 | /* Display extra, target specific information in response to a |
1025 | --target-help switch. */ | |
1026 | DEFHOOK | |
1027 | (help, | |
1028 | "", | |
1029 | void, (void), NULL) | |
1030 | ||
1031 | DEFHOOK_UNDOC | |
1032 | (eh_return_filter_mode, | |
1033 | "Return machine mode for filter value.", | |
1034 | enum machine_mode, (void), | |
1035 | default_eh_return_filter_mode) | |
1036 | ||
1037 | /* Return machine mode for libgcc expanded cmp instructions. */ | |
1038 | DEFHOOK | |
1039 | (libgcc_cmp_return_mode, | |
1040 | "", | |
1041 | enum machine_mode, (void), | |
1042 | default_libgcc_cmp_return_mode) | |
1043 | ||
1044 | /* Return machine mode for libgcc expanded shift instructions. */ | |
1045 | DEFHOOK | |
1046 | (libgcc_shift_count_mode, | |
1047 | "", | |
1048 | enum machine_mode, (void), | |
1049 | default_libgcc_shift_count_mode) | |
1050 | ||
1051 | /* Return machine mode to be used for _Unwind_Word type. */ | |
1052 | DEFHOOK | |
1053 | (unwind_word_mode, | |
1054 | "", | |
1055 | enum machine_mode, (void), | |
1056 | default_unwind_word_mode) | |
1057 | ||
1058 | /* Given two decls, merge their attributes and return the result. */ | |
1059 | DEFHOOK | |
1060 | (merge_decl_attributes, | |
1061 | "", | |
1062 | tree, (tree olddecl, tree newdecl), | |
1063 | merge_decl_attributes) | |
1064 | ||
1065 | /* Given two types, merge their attributes and return the result. */ | |
1066 | DEFHOOK | |
1067 | (merge_type_attributes, | |
1068 | "", | |
1069 | tree, (tree type1, tree type2), | |
1070 | merge_type_attributes) | |
1071 | ||
1072 | /* Table of machine attributes and functions to handle them. | |
1073 | Ignored if NULL. */ | |
1074 | DEFHOOKPOD | |
1075 | (attribute_table, | |
1076 | "", | |
1077 | const struct attribute_spec *, NULL) | |
1078 | ||
1079 | /* Return true iff attribute NAME expects a plain identifier as its first | |
1080 | argument. */ | |
1081 | DEFHOOK | |
1082 | (attribute_takes_identifier_p, | |
1083 | "", | |
1084 | bool, (const_tree name), | |
1085 | hook_bool_const_tree_false) | |
1086 | ||
1087 | /* Return zero if the attributes on TYPE1 and TYPE2 are incompatible, | |
1088 | one if they are compatible and two if they are nearly compatible | |
1089 | (which causes a warning to be generated). */ | |
1090 | DEFHOOK | |
1091 | (comp_type_attributes, | |
1092 | "", | |
1093 | int, (const_tree type1, const_tree type2), | |
1094 | hook_int_const_tree_const_tree_1) | |
1095 | ||
1096 | /* Assign default attributes to the newly defined TYPE. */ | |
1097 | DEFHOOK | |
1098 | (set_default_type_attributes, | |
1099 | "", | |
1100 | void, (tree type), | |
1101 | hook_void_tree) | |
1102 | ||
1103 | /* Insert attributes on the newly created DECL. */ | |
1104 | DEFHOOK | |
1105 | (insert_attributes, | |
1106 | "", | |
1107 | void, (tree node, tree *attr_ptr), | |
1108 | hook_void_tree_treeptr) | |
1109 | ||
1110 | /* Return true if FNDECL (which has at least one machine attribute) | |
1111 | can be inlined despite its machine attributes, false otherwise. */ | |
1112 | DEFHOOK | |
1113 | (function_attribute_inlinable_p, | |
1114 | "", | |
1115 | bool, (const_tree fndecl), | |
1116 | hook_bool_const_tree_false) | |
1117 | ||
1118 | /* Return true if bitfields in RECORD_TYPE should follow the | |
1119 | Microsoft Visual C++ bitfield layout rules. */ | |
1120 | DEFHOOK | |
1121 | (ms_bitfield_layout_p, | |
1122 | "", | |
1123 | bool, (const_tree record_type), | |
1124 | hook_bool_const_tree_false) | |
1125 | ||
2e681adf JR |
1126 | /* For now this is only an interface to WORDS_BIG_ENDIAN for |
1127 | target-independent code like the front ends, need performance testing | |
1128 | before switching completely to the target hook. */ | |
1129 | DEFHOOK_UNDOC | |
1130 | (words_big_endian, | |
1131 | "", | |
1132 | bool, (void), | |
1133 | targhook_words_big_endian) | |
1134 | ||
1135 | /* Likewise for FLOAT_WORDS_BIG_ENDIAN. */ | |
1136 | DEFHOOK_UNDOC | |
1137 | (float_words_big_endian, | |
1138 | "", | |
1139 | bool, (void), | |
1140 | targhook_float_words_big_endian) | |
1141 | ||
38f8b050 JR |
1142 | /* True if the target supports decimal floating point. */ |
1143 | DEFHOOK | |
1144 | (decimal_float_supported_p, | |
1145 | "", | |
1146 | bool, (void), | |
1147 | default_decimal_float_supported_p) | |
1148 | ||
1149 | /* True if the target supports fixed-point. */ | |
1150 | DEFHOOK | |
1151 | (fixed_point_supported_p, | |
1152 | "", | |
1153 | bool, (void), | |
1154 | default_fixed_point_supported_p) | |
1155 | ||
1156 | /* Return true if anonymous bitfields affect structure alignment. */ | |
1157 | DEFHOOK | |
1158 | (align_anon_bitfield, | |
1159 | "", | |
1160 | bool, (void), | |
1161 | hook_bool_void_false) | |
1162 | ||
1163 | /* Return true if volatile bitfields should use the narrowest type possible. | |
1164 | Return false if they should use the container type. */ | |
1165 | DEFHOOK | |
1166 | (narrow_volatile_bitfield, | |
1167 | "", | |
1168 | bool, (void), | |
1169 | hook_bool_void_false) | |
1170 | ||
1171 | /* Set up target-specific built-in functions. */ | |
1172 | DEFHOOK | |
1173 | (init_builtins, | |
1174 | "", | |
1175 | void, (void), | |
1176 | hook_void_void) | |
1177 | ||
1178 | /* Initialize (if INITIALIZE_P is true) and return the target-specific | |
1179 | built-in function decl for CODE. | |
1180 | Return NULL if that is not possible. Return error_mark_node if CODE | |
1181 | is outside of the range of valid target builtin function codes. */ | |
1182 | DEFHOOK | |
1183 | (builtin_decl, | |
1184 | "", | |
1185 | tree, (unsigned code, bool initialize_p), NULL) | |
1186 | ||
1187 | /* Expand a target-specific builtin. */ | |
1188 | DEFHOOK | |
1189 | (expand_builtin, | |
1190 | "", | |
1191 | rtx, | |
1192 | (tree exp, rtx target, rtx subtarget, enum machine_mode mode, int ignore), | |
1193 | default_expand_builtin) | |
1194 | ||
1195 | /* Select a replacement for a target-specific builtin. This is done | |
1196 | *before* regular type checking, and so allows the target to | |
1197 | implement a crude form of function overloading. The result is a | |
1198 | complete expression that implements the operation. PARAMS really | |
1199 | has type VEC(tree,gc)*, but we don't want to include tree.h here. */ | |
d66f5459 | 1200 | DEFHOOK |
38f8b050 JR |
1201 | (resolve_overloaded_builtin, |
1202 | "", | |
d66f5459 | 1203 | tree, (unsigned int /*location_t*/ loc, tree fndecl, void *arglist), NULL) |
38f8b050 JR |
1204 | |
1205 | /* Fold a target-specific builtin. */ | |
08914aaa | 1206 | DEFHOOK |
38f8b050 JR |
1207 | (fold_builtin, |
1208 | "", | |
08914aaa | 1209 | tree, (tree fndecl, int n_args, tree *argp, bool ignore), |
38f8b050 JR |
1210 | hook_tree_tree_int_treep_bool_null) |
1211 | ||
1212 | /* Returns a code for a target-specific builtin that implements | |
1213 | reciprocal of the function, or NULL_TREE if not available. */ | |
89356d17 | 1214 | DEFHOOK |
38f8b050 JR |
1215 | (builtin_reciprocal, |
1216 | "", | |
89356d17 | 1217 | tree, (unsigned fn, bool md_fn, bool sqrt), |
38f8b050 JR |
1218 | default_builtin_reciprocal) |
1219 | ||
1220 | /* For a vendor-specific TYPE, return a pointer to a statically-allocated | |
1221 | string containing the C++ mangling for TYPE. In all other cases, return | |
1222 | NULL. */ | |
1223 | DEFHOOK | |
1224 | (mangle_type, | |
1225 | "", | |
1226 | const char *, (const_tree type), | |
1227 | hook_constcharptr_const_tree_null) | |
1228 | ||
1229 | /* Make any adjustments to libfunc names needed for this target. */ | |
1230 | DEFHOOK | |
1231 | (init_libfuncs, | |
1232 | "", | |
1233 | void, (void), | |
1234 | hook_void_void) | |
1235 | ||
cdbf4541 BS |
1236 | /* Add a __gnu_ prefix to library functions rather than just __. */ |
1237 | DEFHOOKPOD | |
1238 | (libfunc_gnu_prefix, | |
1239 | "If false (the default), internal library routines start with two\n\ | |
1240 | underscores. If set to true, these routines start with @code{__gnu_}\n\ | |
1241 | instead. E.g., @code{__muldi3} changes to @code{__gnu_muldi3}. This\n\ | |
1242 | currently only affects functions defined in @file{libgcc2.c}. If this\n\ | |
1243 | is set to true, the @file{tm.h} file must also\n\ | |
1244 | @code{#define LIBGCC2_GNU_PREFIX}.", | |
1245 | bool, false) | |
1246 | ||
38f8b050 JR |
1247 | /* Given a decl, a section name, and whether the decl initializer |
1248 | has relocs, choose attributes for the section. */ | |
1249 | /* ??? Should be merged with SELECT_SECTION and UNIQUE_SECTION. */ | |
1250 | DEFHOOK | |
1251 | (section_type_flags, | |
1252 | "", | |
1253 | unsigned int, (tree decl, const char *name, int reloc), | |
1254 | default_section_type_flags) | |
1255 | ||
1256 | /* True if new jumps cannot be created, to replace existing ones or | |
1257 | not, at the current point in the compilation. */ | |
1258 | DEFHOOK | |
1259 | (cannot_modify_jumps_p, | |
1260 | "", | |
1261 | bool, (void), | |
1262 | hook_bool_void_false) | |
1263 | ||
1264 | /* Return a register class for which branch target register | |
1265 | optimizations should be applied. */ | |
1266 | DEFHOOK | |
1267 | (branch_target_register_class, | |
1268 | "", | |
a87cf97e | 1269 | reg_class_t, (void), |
38f8b050 JR |
1270 | default_branch_target_register_class) |
1271 | ||
1272 | /* Return true if branch target register optimizations should include | |
1273 | callee-saved registers that are not already live during the current | |
1274 | function. AFTER_PE_GEN is true if prologues and epilogues have | |
1275 | already been generated. */ | |
1276 | DEFHOOK | |
1277 | (branch_target_register_callee_saved, | |
1278 | "", | |
1279 | bool, (bool after_prologue_epilogue_gen), | |
1280 | hook_bool_bool_false) | |
1281 | ||
1282 | /* Return true if the target supports conditional execution. */ | |
1283 | DEFHOOK | |
1284 | (have_conditional_execution, | |
1285 | "", | |
1286 | bool, (void), | |
1287 | default_have_conditional_execution) | |
1288 | ||
1289 | /* Return a new value for loop unroll size. */ | |
1290 | DEFHOOK | |
1291 | (loop_unroll_adjust, | |
1292 | "", | |
1293 | unsigned, (unsigned nunroll, struct loop *loop), | |
1294 | NULL) | |
1295 | ||
1a627b35 RS |
1296 | /* True if X is a legitimate MODE-mode immediate operand. */ |
1297 | DEFHOOK | |
1298 | (legitimate_constant_p, | |
1299 | "", | |
1300 | bool, (enum machine_mode mode, rtx x), | |
1301 | hook_bool_mode_rtx_true) | |
1302 | ||
38f8b050 JR |
1303 | /* True if the constant X cannot be placed in the constant pool. */ |
1304 | DEFHOOK | |
1305 | (cannot_force_const_mem, | |
1306 | "", | |
fbbf66e7 RS |
1307 | bool, (enum machine_mode mode, rtx x), |
1308 | hook_bool_mode_rtx_false) | |
38f8b050 JR |
1309 | |
1310 | DEFHOOK_UNDOC | |
1311 | (cannot_copy_insn_p, | |
1312 | "True if the insn @var{x} cannot be duplicated.", | |
1313 | bool, (rtx), NULL) | |
1314 | ||
1315 | /* True if X is considered to be commutative. */ | |
1316 | DEFHOOK | |
1317 | (commutative_p, | |
1318 | "", | |
1319 | bool, (const_rtx x, int outer_code), | |
1320 | hook_bool_const_rtx_commutative_p) | |
1321 | ||
1322 | /* True if ADDR is an address-expression whose effect depends | |
1323 | on the mode of the memory reference it is used in. */ | |
1324 | DEFHOOK | |
1325 | (mode_dependent_address_p, | |
1326 | "", | |
1327 | bool, (const_rtx addr), | |
1328 | default_mode_dependent_address_p) | |
1329 | ||
1330 | /* Given an invalid address X for a given machine mode, try machine-specific | |
1331 | ways to make it legitimate. Return X or an invalid address on failure. */ | |
1332 | DEFHOOK | |
1333 | (legitimize_address, | |
1334 | "", | |
1335 | rtx, (rtx x, rtx oldx, enum machine_mode mode), | |
1336 | default_legitimize_address) | |
1337 | ||
1338 | /* Given an address RTX, undo the effects of LEGITIMIZE_ADDRESS. */ | |
1339 | DEFHOOK | |
1340 | (delegitimize_address, | |
1341 | "", | |
1342 | rtx, (rtx x), | |
1343 | delegitimize_mem_from_attrs) | |
1344 | ||
1345 | /* Given an address RTX, say whether it is valid. */ | |
1346 | DEFHOOK | |
1347 | (legitimate_address_p, | |
1348 | "", | |
1349 | bool, (enum machine_mode mode, rtx x, bool strict), | |
1350 | default_legitimate_address_p) | |
1351 | ||
1352 | /* True if the given constant can be put into an object_block. */ | |
1353 | DEFHOOK | |
1354 | (use_blocks_for_constant_p, | |
1355 | "", | |
1356 | bool, (enum machine_mode mode, const_rtx x), | |
1357 | hook_bool_mode_const_rtx_false) | |
1358 | ||
1359 | /* The minimum and maximum byte offsets for anchored addresses. */ | |
1360 | DEFHOOKPOD | |
1361 | (min_anchor_offset, | |
1362 | "", | |
1363 | HOST_WIDE_INT, 0) | |
1364 | ||
1365 | DEFHOOKPOD | |
1366 | (max_anchor_offset, | |
1367 | "", | |
1368 | HOST_WIDE_INT, 0) | |
1369 | ||
1370 | /* True if section anchors can be used to access the given symbol. */ | |
1371 | DEFHOOK | |
1372 | (use_anchors_for_symbol_p, | |
1373 | "", | |
1374 | bool, (const_rtx x), | |
1375 | default_use_anchors_for_symbol_p) | |
1376 | ||
1377 | /* True if it is OK to do sibling call optimization for the specified | |
1378 | call expression EXP. DECL will be the called function, or NULL if | |
1379 | this is an indirect call. */ | |
1380 | DEFHOOK | |
1381 | (function_ok_for_sibcall, | |
1382 | "", | |
1383 | bool, (tree decl, tree exp), | |
1384 | hook_bool_tree_tree_false) | |
1385 | ||
1386 | /* Establish appropriate back-end context for processing the function | |
1387 | FNDECL. The argument might be NULL to indicate processing at top | |
1388 | level, outside of any function scope. */ | |
1389 | DEFHOOK | |
1390 | (set_current_function, | |
1391 | "", | |
1392 | void, (tree decl), hook_void_tree) | |
1393 | ||
1394 | /* True if EXP should be placed in a "small data" section. */ | |
1395 | DEFHOOK | |
1396 | (in_small_data_p, | |
1397 | "", | |
1398 | bool, (const_tree exp), | |
1399 | hook_bool_const_tree_false) | |
1400 | ||
1401 | /* True if EXP names an object for which name resolution must resolve | |
1402 | to the current executable or shared library. */ | |
1403 | DEFHOOK | |
1404 | (binds_local_p, | |
1405 | "", | |
1406 | bool, (const_tree exp), | |
1407 | default_binds_local_p) | |
1408 | ||
3c5273a9 KT |
1409 | /* Check if profiling code is before or after prologue. */ |
1410 | DEFHOOK | |
1411 | (profile_before_prologue, | |
1412 | "It returns true if target wants profile code emitted before prologue.\n\n\ | |
1413 | The default version of this hook use the target macro\n\ | |
1414 | @code{PROFILE_BEFORE_PROLOGUE}.", | |
1415 | bool, (void), | |
1416 | default_profile_before_prologue) | |
1417 | ||
38f8b050 JR |
1418 | /* Modify and return the identifier of a DECL's external name, |
1419 | originally identified by ID, as required by the target, | |
1420 | (eg, append @nn to windows32 stdcall function names). | |
1421 | The default is to return ID without modification. */ | |
1422 | DEFHOOK | |
1423 | (mangle_decl_assembler_name, | |
1424 | "", | |
1425 | tree, (tree decl, tree id), | |
1426 | default_mangle_decl_assembler_name) | |
1427 | ||
1428 | /* Do something target-specific to record properties of the DECL into | |
1429 | the associated SYMBOL_REF. */ | |
1430 | DEFHOOK | |
1431 | (encode_section_info, | |
1432 | "", | |
1433 | void, (tree decl, rtx rtl, int new_decl_p), | |
1434 | default_encode_section_info) | |
1435 | ||
1436 | /* Undo the effects of encode_section_info on the symbol string. */ | |
1437 | DEFHOOK | |
1438 | (strip_name_encoding, | |
1439 | "", | |
1440 | const char *, (const char *name), | |
1441 | default_strip_name_encoding) | |
1442 | ||
1443 | /* If shift optabs for MODE are known to always truncate the shift count, | |
1444 | return the mask that they apply. Return 0 otherwise. */ | |
1445 | DEFHOOK | |
1446 | (shift_truncation_mask, | |
1447 | "", | |
1448 | unsigned HOST_WIDE_INT, (enum machine_mode mode), | |
1449 | default_shift_truncation_mask) | |
1450 | ||
1451 | /* Return the number of divisions in the given MODE that should be present, | |
1452 | so that it is profitable to turn the division into a multiplication by | |
1453 | the reciprocal. */ | |
1454 | DEFHOOK | |
1455 | (min_divisions_for_recip_mul, | |
1456 | "", | |
1457 | unsigned int, (enum machine_mode mode), | |
1458 | default_min_divisions_for_recip_mul) | |
1459 | ||
1460 | /* If the representation of integral MODE is such that values are | |
1461 | always sign-extended to a wider mode MODE_REP then return | |
1462 | SIGN_EXTEND. Return UNKNOWN otherwise. */ | |
1463 | /* Note that the return type ought to be RTX_CODE, but that's not | |
1464 | necessarily defined at this point. */ | |
1465 | DEFHOOK | |
1466 | (mode_rep_extended, | |
1467 | "", | |
1468 | int, (enum machine_mode mode, enum machine_mode rep_mode), | |
1469 | default_mode_rep_extended) | |
1470 | ||
1471 | /* True if MODE is valid for a pointer in __attribute__((mode("MODE"))). */ | |
1472 | DEFHOOK | |
1473 | (valid_pointer_mode, | |
1474 | "", | |
1475 | bool, (enum machine_mode mode), | |
1476 | default_valid_pointer_mode) | |
1477 | ||
7352c013 RG |
1478 | /* Disambiguate with errno. */ |
1479 | DEFHOOK | |
1480 | (ref_may_alias_errno, | |
1481 | "Define this to return nonzero if the memory reference @var{ref}\ | |
1482 | may alias with the system C library errno location. The default\ | |
1483 | version of this hook assumes the system C library errno location\ | |
1484 | is either a declaration of type int or accessed by dereferencing\ | |
1485 | a pointer to int.", | |
1486 | bool, (struct ao_ref_s *ref), | |
1487 | default_ref_may_alias_errno) | |
1488 | ||
38f8b050 JR |
1489 | /* Support for named address spaces. */ |
1490 | #undef HOOK_PREFIX | |
1491 | #define HOOK_PREFIX "TARGET_ADDR_SPACE_" | |
1492 | HOOK_VECTOR (TARGET_ADDR_SPACE_HOOKS, addr_space) | |
1493 | ||
1494 | /* MODE to use for a pointer into another address space. */ | |
1495 | DEFHOOK | |
1496 | (pointer_mode, | |
1497 | "", | |
1498 | enum machine_mode, (addr_space_t address_space), | |
1499 | default_addr_space_pointer_mode) | |
1500 | ||
1501 | /* MODE to use for an address in another address space. */ | |
1502 | DEFHOOK | |
1503 | (address_mode, | |
1504 | "", | |
1505 | enum machine_mode, (addr_space_t address_space), | |
1506 | default_addr_space_address_mode) | |
1507 | ||
1508 | /* True if MODE is valid for a pointer in __attribute__((mode("MODE"))) | |
1509 | in another address space. */ | |
1510 | DEFHOOK | |
1511 | (valid_pointer_mode, | |
1512 | "", | |
1513 | bool, (enum machine_mode mode, addr_space_t as), | |
1514 | default_addr_space_valid_pointer_mode) | |
1515 | ||
1516 | /* True if an address is a valid memory address to a given named address | |
1517 | space for a given mode. */ | |
1518 | DEFHOOK | |
1519 | (legitimate_address_p, | |
1520 | "", | |
1521 | bool, (enum machine_mode mode, rtx exp, bool strict, addr_space_t as), | |
1522 | default_addr_space_legitimate_address_p) | |
1523 | ||
1524 | /* Return an updated address to convert an invalid pointer to a named | |
1525 | address space to a valid one. If NULL_RTX is returned use machine | |
1526 | independent methods to make the address valid. */ | |
1527 | DEFHOOK | |
1528 | (legitimize_address, | |
1529 | "", | |
1530 | rtx, (rtx x, rtx oldx, enum machine_mode mode, addr_space_t as), | |
1531 | default_addr_space_legitimize_address) | |
1532 | ||
1533 | /* True if one named address space is a subset of another named address. */ | |
1534 | DEFHOOK | |
1535 | (subset_p, | |
1536 | "", | |
1537 | bool, (addr_space_t superset, addr_space_t subset), | |
1538 | default_addr_space_subset_p) | |
1539 | ||
1540 | /* Function to convert an rtl expression from one address space to another. */ | |
1541 | DEFHOOK | |
1542 | (convert, | |
1543 | "", | |
1544 | rtx, (rtx op, tree from_type, tree to_type), | |
1545 | default_addr_space_convert) | |
1546 | ||
1547 | HOOK_VECTOR_END (addr_space) | |
1548 | ||
1549 | #undef HOOK_PREFIX | |
1550 | #define HOOK_PREFIX "TARGET_" | |
1551 | ||
1552 | /* True if MODE is valid for the target. By "valid", we mean able to | |
1553 | be manipulated in non-trivial ways. In particular, this means all | |
1554 | the arithmetic is supported. */ | |
1555 | DEFHOOK | |
1556 | (scalar_mode_supported_p, | |
1557 | "", | |
1558 | bool, (enum machine_mode mode), | |
1559 | default_scalar_mode_supported_p) | |
1560 | ||
1561 | /* Similarly for vector modes. "Supported" here is less strict. At | |
1562 | least some operations are supported; need to check optabs or builtins | |
1563 | for further details. */ | |
1564 | DEFHOOK | |
1565 | (vector_mode_supported_p, | |
1566 | "", | |
1567 | bool, (enum machine_mode mode), | |
1568 | hook_bool_mode_false) | |
1569 | ||
0f6d54f7 RS |
1570 | /* True if we should try to use a scalar mode to represent an array, |
1571 | overriding the usual MAX_FIXED_MODE limit. */ | |
1572 | DEFHOOK | |
1573 | (array_mode_supported_p, | |
1574 | "Return true if GCC should try to use a scalar mode to store an array\n\ | |
1575 | of @var{nelems} elements, given that each element has mode @var{mode}.\n\ | |
1576 | Returning true here overrides the usual @code{MAX_FIXED_MODE} limit\n\ | |
1577 | and allows GCC to use any defined integer mode.\n\ | |
1578 | \n\ | |
1579 | One use of this hook is to support vector load and store operations\n\ | |
1580 | that operate on several homogeneous vectors. For example, ARM NEON\n\ | |
1581 | has operations like:\n\ | |
1582 | \n\ | |
1583 | @smallexample\n\ | |
1584 | int8x8x3_t vld3_s8 (const int8_t *)\n\ | |
1585 | @end smallexample\n\ | |
1586 | \n\ | |
1587 | where the return type is defined as:\n\ | |
1588 | \n\ | |
1589 | @smallexample\n\ | |
1590 | typedef struct int8x8x3_t\n\ | |
1591 | @{\n\ | |
1592 | int8x8_t val[3];\n\ | |
1593 | @} int8x8x3_t;\n\ | |
1594 | @end smallexample\n\ | |
1595 | \n\ | |
1596 | If this hook allows @code{val} to have a scalar mode, then\n\ | |
1597 | @code{int8x8x3_t} can have the same mode. GCC can then store\n\ | |
1598 | @code{int8x8x3_t}s in registers rather than forcing them onto the stack.", | |
1599 | bool, (enum machine_mode mode, unsigned HOST_WIDE_INT nelems), | |
1600 | hook_bool_mode_uhwi_false) | |
1601 | ||
38f8b050 JR |
1602 | /* Compute cost of moving data from a register of class FROM to one of |
1603 | TO, using MODE. */ | |
1604 | DEFHOOK | |
1605 | (register_move_cost, | |
1606 | "", | |
a87cf97e | 1607 | int, (enum machine_mode mode, reg_class_t from, reg_class_t to), |
38f8b050 JR |
1608 | default_register_move_cost) |
1609 | ||
1610 | /* Compute cost of moving registers to/from memory. */ | |
1611 | /* ??? Documenting the argument types for this hook requires a GFDL | |
1612 | license grant. Also, the documentation uses a different name for RCLASS. */ | |
911852ff | 1613 | DEFHOOK |
38f8b050 JR |
1614 | (memory_move_cost, |
1615 | "", | |
a87cf97e | 1616 | int, (enum machine_mode mode, reg_class_t rclass, bool in), |
38f8b050 JR |
1617 | default_memory_move_cost) |
1618 | ||
1619 | /* True for MODE if the target expects that registers in this mode will | |
1620 | be allocated to registers in a small register class. The compiler is | |
1621 | allowed to use registers explicitly used in the rtl as spill registers | |
1622 | but it should prevent extending the lifetime of these registers. */ | |
1623 | DEFHOOK | |
1624 | (small_register_classes_for_mode_p, | |
1625 | "", | |
1626 | bool, (enum machine_mode mode), | |
1627 | hook_bool_mode_false) | |
1628 | ||
e692f276 RH |
1629 | /* Register number for a flags register. Only needs to be defined if the |
1630 | target is constrainted to use post-reload comparison elimination. */ | |
1631 | DEFHOOKPOD | |
1632 | (flags_regnum, | |
1633 | "If the target has a dedicated flags register, and it needs to use the\ | |
1634 | post-reload comparison elimination pass, then this value should be set\ | |
1635 | appropriately.", | |
1636 | unsigned int, INVALID_REGNUM) | |
1637 | ||
38f8b050 JR |
1638 | /* Compute a (partial) cost for rtx X. Return true if the complete |
1639 | cost has been computed, and false if subexpressions should be | |
1640 | scanned. In either case, *TOTAL contains the cost result. */ | |
1641 | /* Note that CODE and OUTER_CODE ought to be RTX_CODE, but that's | |
1642 | not necessarily defined at this point. */ | |
1643 | DEFHOOK | |
1644 | (rtx_costs, | |
1645 | "", | |
1646 | bool, (rtx x, int code, int outer_code, int *total, bool speed), | |
1647 | hook_bool_rtx_int_int_intp_bool_false) | |
1648 | ||
1649 | /* Compute the cost of X, used as an address. Never called with | |
1650 | invalid addresses. */ | |
1651 | DEFHOOK | |
1652 | (address_cost, | |
1653 | "", | |
1654 | int, (rtx address, bool speed), | |
1655 | default_address_cost) | |
1656 | ||
1657 | /* Return where to allocate pseudo for a given hard register initial value. */ | |
1658 | DEFHOOK | |
1659 | (allocate_initial_value, | |
1660 | "", | |
1661 | rtx, (rtx hard_reg), NULL) | |
1662 | ||
1663 | /* Return nonzero if evaluating UNSPEC[_VOLATILE] X might cause a trap. | |
1664 | FLAGS has the same meaning as in rtlanal.c: may_trap_p_1. */ | |
1665 | DEFHOOK | |
1666 | (unspec_may_trap_p, | |
1667 | "", | |
1668 | int, (const_rtx x, unsigned flags), | |
1669 | default_unspec_may_trap_p) | |
1670 | ||
1671 | /* Given a register, this hook should return a parallel of registers | |
1672 | to represent where to find the register pieces. Define this hook | |
1673 | if the register and its mode are represented in Dwarf in | |
1674 | non-contiguous locations, or if the register should be | |
1675 | represented in more than one register in Dwarf. Otherwise, this | |
1676 | hook should return NULL_RTX. */ | |
1677 | DEFHOOK | |
1678 | (dwarf_register_span, | |
1679 | "", | |
1680 | rtx, (rtx reg), | |
1681 | hook_rtx_rtx_null) | |
1682 | ||
1683 | /* If expand_builtin_init_dwarf_reg_sizes needs to fill in table | |
1684 | entries not corresponding directly to registers below | |
1685 | FIRST_PSEUDO_REGISTER, this hook should generate the necessary | |
1686 | code, given the address of the table. */ | |
1687 | DEFHOOK | |
1688 | (init_dwarf_reg_sizes_extra, | |
1689 | "", | |
1690 | void, (tree address), | |
1691 | hook_void_tree) | |
1692 | ||
1693 | /* Fetch the fixed register(s) which hold condition codes, for | |
1694 | targets where it makes sense to look for duplicate assignments to | |
1695 | the condition codes. This should return true if there is such a | |
1696 | register, false otherwise. The arguments should be set to the | |
1697 | fixed register numbers. Up to two condition code registers are | |
1698 | supported. If there is only one for this target, the int pointed | |
1699 | at by the second argument should be set to -1. */ | |
1700 | DEFHOOK | |
1701 | (fixed_condition_code_regs, | |
1702 | "", | |
1703 | bool, (unsigned int *p1, unsigned int *p2), | |
1704 | hook_bool_uintp_uintp_false) | |
1705 | ||
1706 | /* If two condition code modes are compatible, return a condition | |
1707 | code mode which is compatible with both, such that a comparison | |
1708 | done in the returned mode will work for both of the original | |
1709 | modes. If the condition code modes are not compatible, return | |
1710 | VOIDmode. */ | |
1711 | DEFHOOK | |
1712 | (cc_modes_compatible, | |
1713 | "", | |
1714 | enum machine_mode, (enum machine_mode m1, enum machine_mode m2), | |
1715 | default_cc_modes_compatible) | |
1716 | ||
1717 | /* Do machine-dependent code transformations. Called just before | |
1718 | delayed-branch scheduling. */ | |
1719 | DEFHOOK | |
1720 | (machine_dependent_reorg, | |
1721 | "", | |
1722 | void, (void), NULL) | |
1723 | ||
1724 | /* Create the __builtin_va_list type. */ | |
1725 | DEFHOOK | |
1726 | (build_builtin_va_list, | |
1727 | "", | |
1728 | tree, (void), | |
1729 | std_build_builtin_va_list) | |
1730 | ||
1731 | /* Enumerate the va list variants. */ | |
07a5b2bc | 1732 | DEFHOOK |
38f8b050 JR |
1733 | (enum_va_list_p, |
1734 | "", | |
1735 | int, (int idx, const char **pname, tree *ptree), | |
1736 | NULL) | |
1737 | ||
1738 | /* Get the cfun/fndecl calling abi __builtin_va_list type. */ | |
1739 | DEFHOOK | |
1740 | (fn_abi_va_list, | |
1741 | "", | |
1742 | tree, (tree fndecl), | |
1743 | std_fn_abi_va_list) | |
1744 | ||
1745 | /* Get the __builtin_va_list type dependent on input type. */ | |
1746 | DEFHOOK | |
1747 | (canonical_va_list_type, | |
1748 | "", | |
1749 | tree, (tree type), | |
1750 | std_canonical_va_list_type) | |
1751 | ||
1752 | /* ??? Documenting this hook requires a GFDL license grant. */ | |
1753 | DEFHOOK_UNDOC | |
1754 | (expand_builtin_va_start, | |
1755 | "Expand the @code{__builtin_va_start} builtin.", | |
1756 | void, (tree valist, rtx nextarg), NULL) | |
1757 | ||
1758 | /* Gimplifies a VA_ARG_EXPR. */ | |
1759 | DEFHOOK | |
1760 | (gimplify_va_arg_expr, | |
1761 | "", | |
1762 | tree, (tree valist, tree type, gimple_seq *pre_p, gimple_seq *post_p), | |
1763 | std_gimplify_va_arg_expr) | |
1764 | ||
1765 | /* Validity-checking routines for PCH files, target-specific. | |
1766 | get_pch_validity returns a pointer to the data to be stored, | |
1767 | and stores the size in its argument. pch_valid_p gets the same | |
1768 | information back and returns NULL if the PCH is valid, | |
1769 | or an error message if not. */ | |
1770 | DEFHOOK | |
1771 | (get_pch_validity, | |
1772 | "", | |
1773 | void *, (size_t *sz), | |
1774 | default_get_pch_validity) | |
1775 | ||
1776 | DEFHOOK | |
1777 | (pch_valid_p, | |
1778 | "", | |
1779 | const char *, (const void *data, size_t sz), | |
1780 | default_pch_valid_p) | |
1781 | ||
1782 | /* If nonnull, this function checks whether a PCH file with the | |
1783 | given set of target flags can be used. It returns NULL if so, | |
1784 | otherwise it returns an error message. */ | |
1785 | DEFHOOK | |
1786 | (check_pch_target_flags, | |
1787 | "", | |
1788 | const char *, (int pch_flags), NULL) | |
1789 | ||
1790 | /* True if the compiler should give an enum type only as many | |
1791 | bytes as it takes to represent the range of possible values of | |
1792 | that type. */ | |
1793 | DEFHOOK | |
1794 | (default_short_enums, | |
1795 | "", | |
1796 | bool, (void), | |
1797 | hook_bool_void_false) | |
1798 | ||
1799 | /* This target hook returns an rtx that is used to store the address | |
1800 | of the current frame into the built-in setjmp buffer. */ | |
1801 | DEFHOOK | |
1802 | (builtin_setjmp_frame_value, | |
1803 | "", | |
1804 | rtx, (void), | |
1805 | default_builtin_setjmp_frame_value) | |
1806 | ||
1807 | /* This target hook should add STRING_CST trees for any hard regs | |
1808 | the port wishes to automatically clobber for an asm. */ | |
1809 | DEFHOOK | |
1810 | (md_asm_clobbers, | |
1811 | "", | |
1812 | tree, (tree outputs, tree inputs, tree clobbers), | |
1813 | hook_tree_tree_tree_tree_3rd_identity) | |
1814 | ||
1815 | /* This target hook allows the backend to specify a calling convention | |
1816 | in the debug information. This function actually returns an | |
1817 | enum dwarf_calling_convention, but because of forward declarations | |
1818 | and not wanting to include dwarf2.h everywhere target.h is included | |
1819 | the function is being declared as an int. */ | |
1820 | DEFHOOK | |
1821 | (dwarf_calling_convention, | |
1822 | "", | |
1823 | int, (const_tree function), | |
1824 | hook_int_const_tree_0) | |
1825 | ||
1826 | /* This target hook allows the backend to emit frame-related insns that | |
1827 | contain UNSPECs or UNSPEC_VOLATILEs. The call frame debugging info | |
1828 | engine will invoke it on insns of the form | |
1829 | (set (reg) (unspec [...] UNSPEC_INDEX)) | |
1830 | and | |
1831 | (set (reg) (unspec_volatile [...] UNSPECV_INDEX)) | |
1832 | to let the backend emit the call frame instructions. */ | |
1833 | DEFHOOK | |
1834 | (dwarf_handle_frame_unspec, | |
1835 | "", | |
1836 | void, (const char *label, rtx pattern, int index), NULL) | |
1837 | ||
1838 | /* ??? Documenting this hook requires a GFDL license grant. */ | |
1839 | DEFHOOK_UNDOC | |
1840 | (stdarg_optimize_hook, | |
1841 | "Perform architecture specific checking of statements gimplified\ | |
1842 | from @code{VA_ARG_EXPR}. @var{stmt} is the statement. Returns true if\ | |
1843 | the statement doesn't need to be checked for @code{va_list} references.", | |
1844 | bool, (struct stdarg_info *ai, const_gimple stmt), NULL) | |
1845 | ||
1846 | /* This target hook allows the operating system to override the DECL | |
1847 | that represents the external variable that contains the stack | |
1848 | protection guard variable. The type of this DECL is ptr_type_node. */ | |
1849 | DEFHOOK | |
1850 | (stack_protect_guard, | |
1851 | "", | |
1852 | tree, (void), | |
1853 | default_stack_protect_guard) | |
1854 | ||
1855 | /* This target hook allows the operating system to override the CALL_EXPR | |
1856 | that is invoked when a check vs the guard variable fails. */ | |
1857 | DEFHOOK | |
1858 | (stack_protect_fail, | |
1859 | "", | |
1860 | tree, (void), | |
1861 | default_external_stack_protect_fail) | |
1862 | ||
1863 | /* Returns NULL if target supports the insn within a doloop block, | |
1864 | otherwise it returns an error message. */ | |
1865 | DEFHOOK | |
1866 | (invalid_within_doloop, | |
1867 | "", | |
1868 | const char *, (const_rtx insn), | |
1869 | default_invalid_within_doloop) | |
1870 | ||
1871 | DEFHOOK | |
1872 | (valid_dllimport_attribute_p, | |
1873 | "@var{decl} is a variable or function with @code{__attribute__((dllimport))}\ | |
1874 | specified. Use this hook if the target needs to add extra validation\ | |
1875 | checks to @code{handle_dll_attribute}.", | |
1876 | bool, (const_tree decl), | |
1877 | hook_bool_const_tree_true) | |
1878 | ||
1879 | /* If non-zero, align constant anchors in CSE to a multiple of this | |
1880 | value. */ | |
1881 | DEFHOOKPOD | |
1882 | (const_anchor, | |
1883 | "", | |
1884 | unsigned HOST_WIDE_INT, 0) | |
1885 | ||
1886 | /* Functions relating to calls - argument passing, returns, etc. */ | |
1887 | /* Members of struct call have no special macro prefix. */ | |
1888 | HOOK_VECTOR (TARGET_CALLS, calls) | |
1889 | ||
1890 | DEFHOOK | |
1891 | (promote_function_mode, | |
1892 | "", | |
1893 | enum machine_mode, (const_tree type, enum machine_mode mode, int *punsignedp, | |
1894 | const_tree funtype, int for_return), | |
1895 | default_promote_function_mode) | |
1896 | ||
1897 | DEFHOOK | |
1898 | (promote_prototypes, | |
1899 | "", | |
1900 | bool, (const_tree fntype), | |
1901 | hook_bool_const_tree_false) | |
1902 | ||
1903 | DEFHOOK | |
1904 | (struct_value_rtx, | |
1905 | "", | |
1906 | rtx, (tree fndecl, int incoming), | |
1907 | hook_rtx_tree_int_null) | |
1908 | DEFHOOK | |
1909 | (return_in_memory, | |
1910 | "", | |
1911 | bool, (const_tree type, const_tree fntype), | |
1912 | default_return_in_memory) | |
1913 | ||
1914 | DEFHOOK | |
1915 | (return_in_msb, | |
1916 | "", | |
1917 | bool, (const_tree type), | |
1918 | hook_bool_const_tree_false) | |
1919 | ||
1920 | /* Return true if a parameter must be passed by reference. TYPE may | |
1921 | be null if this is a libcall. CA may be null if this query is | |
1922 | from __builtin_va_arg. */ | |
ec9f85e5 | 1923 | DEFHOOK |
38f8b050 JR |
1924 | (pass_by_reference, |
1925 | "", | |
1926 | bool, | |
1927 | (CUMULATIVE_ARGS *cum, enum machine_mode mode, const_tree type, bool named), | |
1928 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false) | |
1929 | ||
1930 | DEFHOOK | |
1931 | (expand_builtin_saveregs, | |
1932 | "", | |
1933 | rtx, (void), | |
1934 | default_expand_builtin_saveregs) | |
1935 | ||
1936 | /* Returns pretend_argument_size. */ | |
1937 | DEFHOOK | |
1938 | (setup_incoming_varargs, | |
1939 | "", | |
1940 | void, (CUMULATIVE_ARGS *args_so_far, enum machine_mode mode, tree type, | |
1941 | int *pretend_args_size, int second_time), | |
1942 | default_setup_incoming_varargs) | |
1943 | ||
1944 | DEFHOOK | |
1945 | (strict_argument_naming, | |
1946 | "", | |
1947 | bool, (CUMULATIVE_ARGS *ca), | |
1948 | hook_bool_CUMULATIVE_ARGS_false) | |
1949 | ||
1950 | /* Returns true if we should use | |
1951 | targetm.calls.setup_incoming_varargs() and/or | |
1952 | targetm.calls.strict_argument_naming(). */ | |
1953 | DEFHOOK | |
1954 | (pretend_outgoing_varargs_named, | |
1955 | "", | |
1956 | bool, (CUMULATIVE_ARGS *ca), | |
1957 | default_pretend_outgoing_varargs_named) | |
1958 | ||
1959 | /* Given a complex type T, return true if a parameter of type T | |
1960 | should be passed as two scalars. */ | |
1961 | DEFHOOK | |
1962 | (split_complex_arg, | |
1963 | "", | |
1964 | bool, (const_tree type), NULL) | |
1965 | ||
1966 | /* Return true if type T, mode MODE, may not be passed in registers, | |
1967 | but must be passed on the stack. */ | |
1968 | /* ??? This predicate should be applied strictly after pass-by-reference. | |
1969 | Need audit to verify that this is the case. */ | |
1970 | DEFHOOK | |
1971 | (must_pass_in_stack, | |
1972 | "", | |
1973 | bool, (enum machine_mode mode, const_tree type), | |
1974 | must_pass_in_stack_var_size_or_pad) | |
1975 | ||
1976 | /* Return true if type TYPE, mode MODE, which is passed by reference, | |
1977 | should have the object copy generated by the callee rather than | |
1978 | the caller. It is never called for TYPE requiring constructors. */ | |
1979 | DEFHOOK | |
1980 | (callee_copies, | |
1981 | "", | |
1982 | bool, | |
1983 | (CUMULATIVE_ARGS *cum, enum machine_mode mode, const_tree type, bool named), | |
1984 | hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false) | |
1985 | ||
1986 | /* Return zero for arguments passed entirely on the stack or entirely | |
1987 | in registers. If passed in both, return the number of bytes passed | |
1988 | in registers; the balance is therefore passed on the stack. */ | |
1989 | DEFHOOK | |
1990 | (arg_partial_bytes, | |
1991 | "", | |
1992 | int, (CUMULATIVE_ARGS *cum, enum machine_mode mode, tree type, bool named), | |
1993 | hook_int_CUMULATIVE_ARGS_mode_tree_bool_0) | |
1994 | ||
1995 | /* Update the state in CA to advance past an argument in the | |
1996 | argument list. The values MODE, TYPE, and NAMED describe that | |
1997 | argument. */ | |
b25b9e8f | 1998 | DEFHOOK |
38f8b050 JR |
1999 | (function_arg_advance, |
2000 | "", | |
2001 | void, | |
2002 | (CUMULATIVE_ARGS *ca, enum machine_mode mode, const_tree type, bool named), | |
2003 | default_function_arg_advance) | |
2004 | ||
2005 | /* Return zero if the argument described by the state of CA should | |
2006 | be placed on a stack, or a hard register in which to store the | |
2007 | argument. The values MODE, TYPE, and NAMED describe that | |
2008 | argument. */ | |
b25b9e8f | 2009 | DEFHOOK |
38f8b050 JR |
2010 | (function_arg, |
2011 | "", | |
29e88142 | 2012 | rtx, (CUMULATIVE_ARGS *ca, enum machine_mode mode, const_tree type, |
38f8b050 JR |
2013 | bool named), |
2014 | default_function_arg) | |
2015 | ||
2016 | /* Likewise, but for machines with register windows. Return the | |
2017 | location where the argument will appear to the callee. */ | |
b25b9e8f | 2018 | DEFHOOK |
38f8b050 JR |
2019 | (function_incoming_arg, |
2020 | "", | |
29e88142 | 2021 | rtx, (CUMULATIVE_ARGS *ca, enum machine_mode mode, const_tree type, |
38f8b050 JR |
2022 | bool named), |
2023 | default_function_incoming_arg) | |
2024 | ||
c2ed6cf8 NF |
2025 | DEFHOOK |
2026 | (function_arg_boundary, | |
2027 | "", | |
2028 | unsigned int, (enum machine_mode mode, const_tree type), | |
2029 | default_function_arg_boundary) | |
2030 | ||
38f8b050 JR |
2031 | /* Return the diagnostic message string if function without a prototype |
2032 | is not allowed for this 'val' argument; NULL otherwise. */ | |
2033 | DEFHOOK | |
2034 | (invalid_arg_for_unprototyped_fn, | |
2035 | "", | |
2036 | const char *, (const_tree typelist, const_tree funcdecl, const_tree val), | |
2037 | hook_invalid_arg_for_unprototyped_fn) | |
2038 | ||
2039 | /* Return an rtx for the return value location of the function | |
2040 | specified by FN_DECL_OR_TYPE with a return type of RET_TYPE. */ | |
2041 | DEFHOOK | |
2042 | (function_value, | |
2043 | "", | |
2044 | rtx, (const_tree ret_type, const_tree fn_decl_or_type, bool outgoing), | |
2045 | default_function_value) | |
2046 | ||
2047 | /* Return the rtx for the result of a libcall of mode MODE, | |
2048 | calling the function FN_NAME. */ | |
2049 | DEFHOOK | |
2050 | (libcall_value, | |
2051 | "", | |
2052 | rtx, (enum machine_mode mode, const_rtx fun), | |
2053 | default_libcall_value) | |
2054 | ||
2055 | /* Return true if REGNO is a possible register number for | |
2056 | a function value as seen by the caller. */ | |
2057 | DEFHOOK | |
2058 | (function_value_regno_p, | |
2059 | "", | |
2060 | bool, (const unsigned int regno), | |
2061 | default_function_value_regno_p) | |
2062 | ||
2063 | /* ??? Documenting this hook requires a GFDL license grant. */ | |
2064 | DEFHOOK_UNDOC | |
2065 | (internal_arg_pointer, | |
2066 | "Return an rtx for the argument pointer incoming to the\ | |
2067 | current function.", | |
2068 | rtx, (void), | |
2069 | default_internal_arg_pointer) | |
2070 | ||
2071 | /* Update the current function stack boundary if needed. */ | |
2072 | DEFHOOK | |
2073 | (update_stack_boundary, | |
2074 | "", | |
2075 | void, (void), NULL) | |
2076 | ||
2077 | /* Handle stack alignment and return an rtx for Dynamic Realign | |
2078 | Argument Pointer if necessary. */ | |
2079 | DEFHOOK | |
2080 | (get_drap_rtx, | |
2081 | "", | |
2082 | rtx, (void), NULL) | |
2083 | ||
2084 | /* Return true if all function parameters should be spilled to the | |
2085 | stack. */ | |
2086 | DEFHOOK | |
2087 | (allocate_stack_slots_for_args, | |
2088 | "", | |
2089 | bool, (void), | |
2090 | hook_bool_void_true) | |
2091 | ||
2092 | /* Return an rtx for the static chain for FNDECL. If INCOMING_P is true, | |
2093 | then it should be for the callee; otherwise for the caller. */ | |
2094 | DEFHOOK | |
2095 | (static_chain, | |
2096 | "", | |
2097 | rtx, (const_tree fndecl, bool incoming_p), | |
2098 | default_static_chain) | |
2099 | ||
2100 | /* Fill in the trampoline at MEM with a call to FNDECL and a | |
2101 | static chain value of CHAIN. */ | |
2102 | DEFHOOK | |
2103 | (trampoline_init, | |
2104 | "", | |
2105 | void, (rtx m_tramp, tree fndecl, rtx static_chain), | |
2106 | default_trampoline_init) | |
2107 | ||
2108 | /* Adjust the address of the trampoline in a target-specific way. */ | |
2109 | DEFHOOK | |
2110 | (trampoline_adjust_address, | |
2111 | "", | |
2112 | rtx, (rtx addr), NULL) | |
2113 | ||
2114 | /* Return the number of bytes of its own arguments that a function | |
2115 | pops on returning, or 0 if the function pops no arguments and the | |
2116 | caller must therefore pop them all after the function returns. */ | |
2117 | /* ??? tm.texi has no types for the parameters. */ | |
893d13d5 | 2118 | DEFHOOK |
38f8b050 JR |
2119 | (return_pops_args, |
2120 | "", | |
2121 | int, (tree fundecl, tree funtype, int size), | |
2122 | default_return_pops_args) | |
2123 | ||
ffa88471 SE |
2124 | /* Return a mode wide enough to copy any function value that might be |
2125 | returned. */ | |
2126 | DEFHOOK | |
2127 | (get_raw_result_mode, | |
2128 | "This target hook returns the mode to be used when accessing raw return\ | |
2129 | registers in @code{__builtin_return}. Define this macro if the value\ | |
2130 | in @var{reg_raw_mode} is not correct.", | |
2131 | enum machine_mode, (int regno), | |
2132 | default_get_reg_raw_mode) | |
2133 | ||
2134 | /* Return a mode wide enough to copy any argument value that might be | |
2135 | passed. */ | |
2136 | DEFHOOK | |
2137 | (get_raw_arg_mode, | |
2138 | "This target hook returns the mode to be used when accessing raw argument\ | |
2139 | registers in @code{__builtin_apply_args}. Define this macro if the value\ | |
2140 | in @var{reg_raw_mode} is not correct.", | |
2141 | enum machine_mode, (int regno), | |
2142 | default_get_reg_raw_mode) | |
2143 | ||
38f8b050 JR |
2144 | HOOK_VECTOR_END (calls) |
2145 | ||
2146 | /* Return the diagnostic message string if conversion from FROMTYPE | |
2147 | to TOTYPE is not allowed, NULL otherwise. */ | |
2148 | DEFHOOK | |
2149 | (invalid_conversion, | |
2150 | "", | |
2151 | const char *, (const_tree fromtype, const_tree totype), | |
2152 | hook_constcharptr_const_tree_const_tree_null) | |
2153 | ||
2154 | /* Return the diagnostic message string if the unary operation OP is | |
2155 | not permitted on TYPE, NULL otherwise. */ | |
2156 | DEFHOOK | |
2157 | (invalid_unary_op, | |
2158 | "", | |
2159 | const char *, (int op, const_tree type), | |
2160 | hook_constcharptr_int_const_tree_null) | |
2161 | ||
2162 | /* Return the diagnostic message string if the binary operation OP | |
2163 | is not permitted on TYPE1 and TYPE2, NULL otherwise. */ | |
2164 | DEFHOOK | |
2165 | (invalid_binary_op, | |
2166 | "", | |
2167 | const char *, (int op, const_tree type1, const_tree type2), | |
2168 | hook_constcharptr_int_const_tree_const_tree_null) | |
2169 | ||
2170 | /* Return the diagnostic message string if TYPE is not valid as a | |
2171 | function parameter type, NULL otherwise. */ | |
2172 | DEFHOOK | |
2173 | (invalid_parameter_type, | |
2174 | "", | |
2175 | const char *, (const_tree type), | |
2176 | hook_constcharptr_const_tree_null) | |
2177 | ||
2178 | /* Return the diagnostic message string if TYPE is not valid as a | |
2179 | function return type, NULL otherwise. */ | |
2180 | DEFHOOK | |
2181 | (invalid_return_type, | |
2182 | "", | |
2183 | const char *, (const_tree type), | |
2184 | hook_constcharptr_const_tree_null) | |
2185 | ||
2186 | /* If values of TYPE are promoted to some other type when used in | |
2187 | expressions (analogous to the integer promotions), return that type, | |
2188 | or NULL_TREE otherwise. */ | |
2189 | DEFHOOK | |
2190 | (promoted_type, | |
2191 | "", | |
2192 | tree, (const_tree type), | |
2193 | hook_tree_const_tree_null) | |
2194 | ||
2195 | /* Convert EXPR to TYPE, if target-specific types with special conversion | |
2196 | rules are involved. Return the converted expression, or NULL to apply | |
2197 | the standard conversion rules. */ | |
2198 | DEFHOOK | |
2199 | (convert_to_type, | |
2200 | "", | |
2201 | tree, (tree type, tree expr), | |
2202 | hook_tree_tree_tree_null) | |
2203 | ||
38f8b050 JR |
2204 | /* Return the class for a secondary reload, and fill in extra information. */ |
2205 | DEFHOOK | |
2206 | (secondary_reload, | |
2207 | "", | |
a87cf97e JR |
2208 | reg_class_t, |
2209 | (bool in_p, rtx x, reg_class_t reload_class, enum machine_mode reload_mode, | |
38f8b050 JR |
2210 | secondary_reload_info *sri), |
2211 | default_secondary_reload) | |
2212 | ||
fba42e24 AS |
2213 | /* Given an rtx X being reloaded into a reg required to be in class CLASS, |
2214 | return the class of reg to actually use. */ | |
2215 | DEFHOOK | |
2216 | (preferred_reload_class, | |
2217 | "", | |
2218 | reg_class_t, | |
2219 | (rtx x, reg_class_t rclass), | |
2220 | default_preferred_reload_class) | |
2221 | ||
abd26bfb AS |
2222 | /* Like TARGET_PREFERRED_RELOAD_CLASS, but for output reloads instead of |
2223 | input reloads. */ | |
2224 | DEFHOOK | |
2225 | (preferred_output_reload_class, | |
2226 | "", | |
2227 | reg_class_t, | |
2228 | (rtx x, reg_class_t rclass), | |
2229 | default_preferred_output_reload_class) | |
2230 | ||
07b8f0a8 AS |
2231 | DEFHOOK |
2232 | (class_likely_spilled_p, | |
2233 | "", | |
2234 | bool, (reg_class_t rclass), | |
2235 | default_class_likely_spilled_p) | |
2236 | ||
5f286f4a YQ |
2237 | DEFHOOK |
2238 | (preferred_rename_class, | |
2239 | "A target hook that places additional preference on the register\ | |
2240 | class to use when it is necessary to rename a register in class\ | |
6d3fbe2f JR |
2241 | @var{rclass} to another class, or perhaps @var{NO_REGS}, if no\ |
2242 | preferred register class is found or hook @code{preferred_rename_class}\ | |
5f286f4a YQ |
2243 | is not implemented.\ |
2244 | Sometimes returning a more restrictive class makes better code. For\ | |
2245 | example, on ARM, thumb-2 instructions using @code{LO_REGS} may be\ | |
2246 | smaller than instructions using @code{GENERIC_REGS}. By returning\ | |
2247 | @code{LO_REGS} from @code{preferred_rename_class}, code size can\ | |
2248 | be reduced.", | |
2249 | reg_class_t, (reg_class_t rclass), | |
2250 | default_preferred_rename_class) | |
2251 | ||
38f8b050 JR |
2252 | /* This target hook allows the backend to perform additional |
2253 | processing while initializing for variable expansion. */ | |
2254 | DEFHOOK | |
2255 | (expand_to_rtl_hook, | |
2256 | "", | |
2257 | void, (void), | |
2258 | hook_void_void) | |
2259 | ||
2260 | /* This target hook allows the backend to perform additional | |
2261 | instantiations on rtx that are not actually in insns yet, | |
2262 | but will be later. */ | |
2263 | DEFHOOK | |
2264 | (instantiate_decls, | |
2265 | "", | |
2266 | void, (void), | |
2267 | hook_void_void) | |
2268 | ||
2269 | /* Return true if is OK to use a hard register REGNO as scratch register | |
2270 | in peephole2. */ | |
2271 | DEFHOOK | |
2272 | (hard_regno_scratch_ok, | |
2273 | "", | |
2274 | bool, (unsigned int regno), | |
2275 | default_hard_regno_scratch_ok) | |
2276 | ||
2277 | /* Return the smallest number of different values for which it is best to | |
2278 | use a jump-table instead of a tree of conditional branches. */ | |
2279 | DEFHOOK | |
2280 | (case_values_threshold, | |
2281 | "", | |
2282 | unsigned int, (void), | |
2283 | default_case_values_threshold) | |
2284 | ||
2285 | /* Retutn true if a function must have and use a frame pointer. */ | |
2286 | DEFHOOK | |
2287 | (frame_pointer_required, | |
2288 | "", | |
2289 | bool, (void), | |
2290 | hook_bool_void_false) | |
2291 | ||
2292 | /* Returns true if the compiler is allowed to try to replace register number | |
2293 | from-reg with register number to-reg. */ | |
2294 | DEFHOOK | |
2295 | (can_eliminate, | |
2296 | "", | |
2297 | bool, (const int from_reg, const int to_reg), | |
2298 | hook_bool_const_int_const_int_true) | |
2299 | ||
5efd84c5 NF |
2300 | /* Modify any or all of fixed_regs, call_used_regs, global_regs, |
2301 | reg_names, and reg_class_contents to account of the vagaries of the | |
2302 | target. */ | |
2303 | DEFHOOK | |
2304 | (conditional_register_usage, | |
2305 | "", | |
2306 | void, (void), | |
2307 | hook_void_void) | |
2308 | ||
38f8b050 JR |
2309 | /* Functions specific to the C family of frontends. */ |
2310 | #undef HOOK_PREFIX | |
2311 | #define HOOK_PREFIX "TARGET_C_" | |
2312 | HOOK_VECTOR (TARGET_C, c) | |
2313 | ||
2314 | /* ??? Documenting this hook requires a GFDL license grant. */ | |
2315 | DEFHOOK_UNDOC | |
2316 | (mode_for_suffix, | |
2317 | "Return machine mode for non-standard constant literal suffix @var{c},\ | |
2318 | or VOIDmode if non-standard suffixes are unsupported.", | |
2319 | enum machine_mode, (char c), | |
2320 | default_mode_for_suffix) | |
2321 | ||
2322 | HOOK_VECTOR_END (c) | |
2323 | ||
2324 | /* Functions specific to the C++ frontend. */ | |
2325 | #undef HOOK_PREFIX | |
2326 | #define HOOK_PREFIX "TARGET_CXX_" | |
2327 | HOOK_VECTOR (TARGET_CXX, cxx) | |
2328 | ||
2329 | /* Return the integer type used for guard variables. */ | |
2330 | DEFHOOK | |
2331 | (guard_type, | |
2332 | "", | |
2333 | tree, (void), | |
2334 | default_cxx_guard_type) | |
2335 | ||
2336 | /* Return true if only the low bit of the guard should be tested. */ | |
2337 | DEFHOOK | |
2338 | (guard_mask_bit, | |
2339 | "", | |
2340 | bool, (void), | |
2341 | hook_bool_void_false) | |
2342 | ||
2343 | /* Returns the size of the array cookie for an array of type. */ | |
2344 | DEFHOOK | |
2345 | (get_cookie_size, | |
2346 | "", | |
2347 | tree, (tree type), | |
2348 | default_cxx_get_cookie_size) | |
2349 | ||
2350 | /* Returns true if the element size should be stored in the array cookie. */ | |
2351 | DEFHOOK | |
2352 | (cookie_has_size, | |
2353 | "", | |
2354 | bool, (void), | |
2355 | hook_bool_void_false) | |
2356 | ||
2357 | /* Allows backends to perform additional processing when | |
2358 | deciding if a class should be exported or imported. */ | |
2359 | DEFHOOK | |
2360 | (import_export_class, | |
2361 | "", | |
2362 | int, (tree type, int import_export), NULL) | |
2363 | ||
2364 | /* Returns true if constructors and destructors return "this". */ | |
2365 | DEFHOOK | |
2366 | (cdtor_returns_this, | |
2367 | "", | |
2368 | bool, (void), | |
2369 | hook_bool_void_false) | |
2370 | ||
2371 | /* Returns true if the key method for a class can be an inline | |
2372 | function, so long as it is not declared inline in the class | |
2373 | itself. Returning true is the behavior required by the Itanium C++ ABI. */ | |
2374 | DEFHOOK | |
2375 | (key_method_may_be_inline, | |
2376 | "", | |
2377 | bool, (void), | |
2378 | hook_bool_void_true) | |
2379 | ||
2380 | DEFHOOK | |
2381 | (determine_class_data_visibility, | |
2382 | "@var{decl} is a virtual table, virtual table table, typeinfo object,\ | |
2383 | or other similar implicit class data object that will be emitted with\ | |
2384 | external linkage in this translation unit. No ELF visibility has been\ | |
2385 | explicitly specified. If the target needs to specify a visibility\ | |
2386 | other than that of the containing class, use this hook to set\ | |
2387 | @code{DECL_VISIBILITY} and @code{DECL_VISIBILITY_SPECIFIED}.", | |
2388 | void, (tree decl), | |
2389 | hook_void_tree) | |
2390 | ||
2391 | /* Returns true (the default) if virtual tables and other | |
2392 | similar implicit class data objects are always COMDAT if they | |
2393 | have external linkage. If this hook returns false, then | |
2394 | class data for classes whose virtual table will be emitted in | |
2395 | only one translation unit will not be COMDAT. */ | |
2396 | DEFHOOK | |
2397 | (class_data_always_comdat, | |
2398 | "", | |
2399 | bool, (void), | |
2400 | hook_bool_void_true) | |
2401 | ||
2402 | /* Returns true (the default) if the RTTI for the basic types, | |
2403 | which is always defined in the C++ runtime, should be COMDAT; | |
2404 | false if it should not be COMDAT. */ | |
2405 | DEFHOOK | |
2406 | (library_rtti_comdat, | |
2407 | "", | |
2408 | bool, (void), | |
2409 | hook_bool_void_true) | |
2410 | ||
2411 | /* Returns true if __aeabi_atexit should be used to register static | |
2412 | destructors. */ | |
2413 | DEFHOOK | |
2414 | (use_aeabi_atexit, | |
2415 | "", | |
2416 | bool, (void), | |
2417 | hook_bool_void_false) | |
2418 | ||
2419 | /* Returns true if target may use atexit in the same manner as | |
2420 | __cxa_atexit to register static destructors. */ | |
2421 | DEFHOOK | |
2422 | (use_atexit_for_cxa_atexit, | |
2423 | "", | |
2424 | bool, (void), | |
2425 | hook_bool_void_false) | |
2426 | ||
2427 | DEFHOOK | |
2428 | (adjust_class_at_definition, | |
2429 | "@var{type} is a C++ class (i.e., RECORD_TYPE or UNION_TYPE) that has just\ | |
2430 | been defined. Use this hook to make adjustments to the class (eg, tweak\ | |
2431 | visibility or perform any other required target modifications).", | |
2432 | void, (tree type), | |
2433 | hook_void_tree) | |
2434 | ||
2435 | HOOK_VECTOR_END (cxx) | |
2436 | ||
2437 | /* Functions and data for emulated TLS support. */ | |
2438 | #undef HOOK_PREFIX | |
2439 | #define HOOK_PREFIX "TARGET_EMUTLS_" | |
2440 | HOOK_VECTOR (TARGET_EMUTLS, emutls) | |
2441 | ||
2442 | /* Name of the address and common functions. */ | |
2443 | DEFHOOKPOD | |
2444 | (get_address, | |
2445 | "", | |
2446 | const char *, "__builtin___emutls_get_address") | |
2447 | ||
2448 | DEFHOOKPOD | |
2449 | (register_common, | |
2450 | "", | |
2451 | const char *, "__builtin___emutls_register_common") | |
2452 | ||
2453 | /* Prefixes for proxy variable and template. */ | |
2454 | DEFHOOKPOD | |
2455 | (var_section, | |
2456 | "", | |
2457 | const char *, NULL) | |
2458 | ||
2459 | DEFHOOKPOD | |
2460 | (tmpl_section, | |
2461 | "", | |
2462 | const char *, NULL) | |
2463 | ||
2464 | /* Prefixes for proxy variable and template. */ | |
2465 | DEFHOOKPOD | |
2466 | (var_prefix, | |
2467 | "", | |
2468 | const char *, NULL) | |
2469 | ||
2470 | DEFHOOKPOD | |
2471 | (tmpl_prefix, | |
2472 | "", | |
2473 | const char *, NULL) | |
2474 | ||
2475 | /* Function to generate field definitions of the proxy variable. */ | |
2476 | DEFHOOK | |
2477 | (var_fields, | |
2478 | "", | |
2479 | tree, (tree type, tree *name), | |
2480 | default_emutls_var_fields) | |
2481 | ||
2482 | /* Function to initialize a proxy variable. */ | |
2483 | DEFHOOK | |
2484 | (var_init, | |
2485 | "", | |
2486 | tree, (tree var, tree decl, tree tmpl_addr), | |
2487 | default_emutls_var_init) | |
2488 | ||
2489 | /* Whether we are allowed to alter the usual alignment of the | |
2490 | proxy variable. */ | |
2491 | DEFHOOKPOD | |
2492 | (var_align_fixed, | |
2493 | "", | |
2494 | bool, false) | |
2495 | ||
2496 | /* Whether we can emit debug information for TLS vars. */ | |
2497 | DEFHOOKPOD | |
2498 | (debug_form_tls_address, | |
2499 | "", | |
2500 | bool, false) | |
2501 | ||
2502 | HOOK_VECTOR_END (emutls) | |
2503 | ||
2504 | #undef HOOK_PREFIX | |
2505 | #define HOOK_PREFIX "TARGET_OPTION_" | |
2506 | HOOK_VECTOR (TARGET_OPTION_HOOKS, target_option_hooks) | |
2507 | ||
2508 | /* Function to validate the attribute((option(...))) strings or NULL. If | |
2509 | the option is validated, it is assumed that DECL_FUNCTION_SPECIFIC will | |
2510 | be filled in in the function decl node. */ | |
2511 | DEFHOOK | |
2512 | (valid_attribute_p, | |
2513 | "", | |
2514 | bool, (tree fndecl, tree name, tree args, int flags), | |
2515 | default_target_option_valid_attribute_p) | |
2516 | ||
2517 | /* Function to save any extra target state in the target options structure. */ | |
2518 | DEFHOOK | |
2519 | (save, | |
2520 | "", | |
2521 | void, (struct cl_target_option *ptr), NULL) | |
2522 | ||
2523 | /* Function to restore any extra target state from the target options | |
2524 | structure. */ | |
2525 | DEFHOOK | |
2526 | (restore, | |
2527 | "", | |
2528 | void, (struct cl_target_option *ptr), NULL) | |
2529 | ||
2530 | /* Function to print any extra target state from the target options | |
2531 | structure. */ | |
2532 | DEFHOOK | |
2533 | (print, | |
2534 | "", | |
2535 | void, (FILE *file, int indent, struct cl_target_option *ptr), NULL) | |
2536 | ||
2537 | /* Function to parse arguments to be validated for #pragma option, and to | |
2538 | change the state if the options are valid. If the first argument is | |
2539 | NULL, the second argument specifies the default options to use. Return | |
2540 | true if the options are valid, and set the current state. */ | |
56cb42ea JR |
2541 | /* ??? The documentation in tm.texi is incomplete. */ |
2542 | DEFHOOK | |
38f8b050 JR |
2543 | (pragma_parse, |
2544 | "", | |
2545 | bool, (tree args, tree pop_target), | |
2546 | default_target_option_pragma_parse) | |
2547 | ||
2548 | /* Do option overrides for the target. */ | |
2549 | DEFHOOK | |
2550 | (override, | |
2551 | "", | |
2552 | void, (void), | |
c5387660 | 2553 | hook_void_void) |
38f8b050 | 2554 | |
128dc8e2 JM |
2555 | DEFHOOK |
2556 | (default_params, | |
2557 | "Set target-dependent default values for @option{--param} settings, using\ | |
2558 | calls to @code{set_default_param_value}.", | |
2559 | void, (void), | |
2560 | hook_void_void) | |
2561 | ||
38f8b050 JR |
2562 | /* Function to determine if one function can inline another function. */ |
2563 | #undef HOOK_PREFIX | |
2564 | #define HOOK_PREFIX "TARGET_" | |
2565 | DEFHOOK | |
2566 | (can_inline_p, | |
2567 | "", | |
2568 | bool, (tree caller, tree callee), | |
2569 | default_target_can_inline_p) | |
2570 | ||
2571 | HOOK_VECTOR_END (target_option) | |
2572 | ||
2573 | /* For targets that need to mark extra registers as live on entry to | |
2574 | the function, they should define this target hook and set their | |
2575 | bits in the bitmap passed in. */ | |
2576 | DEFHOOK | |
2577 | (extra_live_on_entry, | |
2578 | "", | |
2579 | void, (bitmap regs), | |
2580 | hook_void_bitmap) | |
2581 | ||
f0a0390e RH |
2582 | /* Determine the type of unwind info to emit for debugging. */ |
2583 | DEFHOOK | |
2584 | (debug_unwind_info, | |
2585 | "", | |
2586 | enum unwind_info_type, (void), | |
2587 | default_debug_unwind_info) | |
2588 | ||
38f8b050 JR |
2589 | /* Leave the boolean fields at the end. */ |
2590 | ||
38f8b050 JR |
2591 | /* True if we can create zeroed data by switching to a BSS section |
2592 | and then using ASM_OUTPUT_SKIP to allocate the space. */ | |
2593 | DEFHOOKPOD | |
2594 | (have_switchable_bss_sections, | |
2595 | "", | |
2596 | bool, false) | |
2597 | ||
2598 | /* True if "native" constructors and destructors are supported, | |
2599 | false if we're using collect2 for the job. */ | |
2600 | DEFHOOKPOD | |
2601 | (have_ctors_dtors, | |
2602 | "", | |
2603 | bool, false) | |
2604 | ||
2605 | /* True if thread-local storage is supported. */ | |
2606 | DEFHOOKPOD | |
2607 | (have_tls, | |
2608 | "", | |
2609 | bool, false) | |
2610 | ||
2611 | /* True if a small readonly data section is supported. */ | |
2612 | DEFHOOKPOD | |
2613 | (have_srodata_section, | |
2614 | "", | |
2615 | bool, false) | |
2616 | ||
2617 | /* True if EH frame info sections should be zero-terminated. */ | |
2618 | DEFHOOKPOD | |
2619 | (terminate_dw2_eh_frame_info, | |
2620 | "", | |
2621 | bool, true) | |
2622 | ||
2623 | /* True if #NO_APP should be emitted at the beginning of assembly output. */ | |
2624 | DEFHOOKPOD | |
2625 | (asm_file_start_app_off, | |
2626 | "", | |
2627 | bool, false) | |
2628 | ||
2629 | /* True if output_file_directive should be called for main_input_filename | |
2630 | at the beginning of assembly output. */ | |
2631 | DEFHOOKPOD | |
2632 | (asm_file_start_file_directive, | |
2633 | "", | |
2634 | bool, false) | |
2635 | ||
2636 | DEFHOOKPOD | |
2637 | (handle_pragma_extern_prefix, | |
2638 | "True if @code{#pragma extern_prefix} is to be supported.", | |
2639 | bool, 0) | |
2640 | ||
2641 | /* True if the target is allowed to reorder memory accesses unless | |
2642 | synchronization is explicitly requested. */ | |
2643 | DEFHOOKPOD | |
2644 | (relaxed_ordering, | |
2645 | "", | |
2646 | bool, false) | |
2647 | ||
2648 | /* Returns true if we should generate exception tables for use with the | |
2649 | ARM EABI. The effects the encoding of function exception specifications. */ | |
2650 | DEFHOOKPOD | |
2651 | (arm_eabi_unwinder, | |
2652 | "", | |
2653 | bool, false) | |
2654 | ||
9730bc27 TT |
2655 | DEFHOOKPOD |
2656 | (want_debug_pub_sections, | |
2657 | "True if the @code{.debug_pubtypes} and @code{.debug_pubnames} sections\ | |
2658 | should be emitted. These sections are not used on most platforms, and\ | |
2659 | in particular GDB does not use them.", | |
2660 | bool, false) | |
2661 | ||
2ba42841 AO |
2662 | DEFHOOKPOD |
2663 | (delay_sched2, "True if sched2 is not to be run at its normal place. \ | |
2664 | This usually means it will be run as part of machine-specific reorg.", | |
2665 | bool, false) | |
2666 | ||
2667 | DEFHOOKPOD | |
2668 | (delay_vartrack, "True if vartrack is not to be run at its normal place. \ | |
2669 | This usually means it will be run as part of machine-specific reorg.", | |
2670 | bool, false) | |
2671 | ||
38f8b050 JR |
2672 | /* Leave the boolean fields at the end. */ |
2673 | ||
38f8b050 JR |
2674 | /* Close the 'struct gcc_target' definition. */ |
2675 | HOOK_VECTOR_END (C90_EMPTY_HACK) |