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672a6f42 | 1 | /* Data structure definitions for a generic GCC target. |
c7ec5472 MK |
2 | Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 |
3 | Free Software Foundation, Inc. | |
672a6f42 NB |
4 | |
5 | This program is free software; you can redistribute it and/or modify it | |
6 | under the terms of the GNU General Public License as published by the | |
7 | Free Software Foundation; either version 2, or (at your option) any | |
8 | later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
366ccddb | 17 | Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
672a6f42 NB |
18 | |
19 | In other words, you are welcome to use, share and improve this program. | |
20 | You are forbidden to forbid anyone else to use, share and improve | |
21 | what you give them. Help stamp out software-hoarding! */ | |
22 | ||
23 | /* This file contains a data structure that describes a GCC target. | |
17b53c33 | 24 | At present it is incomplete, but in future it should grow to |
672a6f42 NB |
25 | contain most or all target machine and target O/S specific |
26 | information. | |
27 | ||
28 | This structure has its initializer declared in target-def.h in the | |
29 | form of large macro TARGET_INITIALIZER that expands to many smaller | |
30 | macros. | |
31 | ||
32 | The smaller macros each initialize one component of the structure, | |
33 | and each has a default. Each target should have a file that | |
34 | includes target.h and target-def.h, and overrides any inappropriate | |
35 | defaults by undefining the relevant macro and defining a suitable | |
36 | replacement. That file should then contain the definition of | |
f6897b10 | 37 | "targetm" like so: |
672a6f42 | 38 | |
f6897b10 | 39 | struct gcc_target targetm = TARGET_INITIALIZER; |
672a6f42 NB |
40 | |
41 | Doing things this way allows us to bring together everything that | |
17b53c33 NB |
42 | defines a GCC target. By supplying a default that is appropriate |
43 | to most targets, we can easily add new items without needing to | |
44 | edit dozens of target configuration files. It should also allow us | |
45 | to gradually reduce the amount of conditional compilation that is | |
46 | scattered throughout GCC. */ | |
672a6f42 | 47 | |
59587b18 JQ |
48 | #ifndef GCC_TARGET_H |
49 | #define GCC_TARGET_H | |
50 | ||
7bb1ad93 | 51 | #include "tm.h" |
59587b18 | 52 | #include "insn-modes.h" |
7bb1ad93 | 53 | |
e0d9d0dd NC |
54 | /* Types used by the record_gcc_switches() target function. */ |
55 | typedef enum | |
56 | { | |
57 | SWITCH_TYPE_PASSED, /* A switch passed on the command line. */ | |
58 | SWITCH_TYPE_ENABLED, /* An option that is currently enabled. */ | |
59 | SWITCH_TYPE_DESCRIPTIVE, /* Descriptive text, not a switch or option. */ | |
60 | SWITCH_TYPE_LINE_START, /* Please emit any necessary text at the start of a line. */ | |
61 | SWITCH_TYPE_LINE_END /* Please emit a line terminator. */ | |
62 | } | |
63 | print_switch_type; | |
64 | ||
65 | typedef int (* print_switch_fn_type) (print_switch_type, const char *); | |
66 | ||
67 | /* An example implementation for ELF targets. Defined in varasm.c */ | |
68 | extern int elf_record_gcc_switches (print_switch_type type, const char *); | |
69 | ||
9d30f3c1 | 70 | struct stdarg_info; |
496d7bb0 | 71 | struct spec_info_def; |
9d30f3c1 | 72 | |
8a99f6f9 R |
73 | /* The struct used by the secondary_reload target hook. */ |
74 | typedef struct secondary_reload_info | |
75 | { | |
76 | /* icode is actually an enum insn_code, but we don't want to force every | |
77 | file that includes target.h to include optabs.h . */ | |
78 | int icode; | |
79 | int extra_cost; /* Cost for using (a) scratch register(s) to be taken | |
80 | into account by copy_cost. */ | |
81 | /* The next two members are for the use of the backward | |
82 | compatibility hook. */ | |
83 | struct secondary_reload_info *prev_sri; | |
84 | int t_icode; /* Actually an enum insn_code - see above. */ | |
85 | } secondary_reload_info; | |
86 | ||
87 | ||
672a6f42 NB |
88 | struct gcc_target |
89 | { | |
08c148a8 NB |
90 | /* Functions that output assembler for the target. */ |
91 | struct asm_out | |
92 | { | |
17b53c33 NB |
93 | /* Opening and closing parentheses for asm expression grouping. */ |
94 | const char *open_paren, *close_paren; | |
95 | ||
301d03af RS |
96 | /* Assembler instructions for creating various kinds of integer object. */ |
97 | const char *byte_op; | |
98 | struct asm_int_op | |
99 | { | |
100 | const char *hi; | |
101 | const char *si; | |
102 | const char *di; | |
103 | const char *ti; | |
104 | } aligned_op, unaligned_op; | |
105 | ||
106 | /* Try to output the assembler code for an integer object whose | |
107 | value is given by X. SIZE is the size of the object in bytes and | |
108 | ALIGNED_P indicates whether it is aligned. Return true if | |
109 | successful. Only handles cases for which BYTE_OP, ALIGNED_OP | |
110 | and UNALIGNED_OP are NULL. */ | |
46c5ad27 | 111 | bool (* integer) (rtx x, unsigned int size, int aligned_p); |
301d03af | 112 | |
5eb99654 | 113 | /* Output code that will globalize a label. */ |
46c5ad27 | 114 | void (* globalize_label) (FILE *, const char *); |
5eb99654 | 115 | |
812b587e SE |
116 | /* Output code that will globalise a declaration. */ |
117 | void (* globalize_decl_name) (FILE *, tree); | |
118 | ||
4746cf84 MA |
119 | /* Output code that will emit a label for unwind info, if this |
120 | target requires such labels. Second argument is the decl the | |
eeab4d81 MS |
121 | unwind info is associated with, third is a boolean: true if |
122 | this is for exception handling, fourth is a boolean: true if | |
9cf737f8 | 123 | this is only a placeholder for an omitted FDE. */ |
eeab4d81 | 124 | void (* unwind_label) (FILE *, tree, int, int); |
4746cf84 | 125 | |
083cad55 EC |
126 | /* Output code that will emit a label to divide up the exception |
127 | table. */ | |
128 | void (* except_table_label) (FILE *); | |
129 | ||
951120ea PB |
130 | /* Emit any directives required to unwind this instruction. */ |
131 | void (* unwind_emit) (FILE *, rtx); | |
132 | ||
4977bab6 | 133 | /* Output an internal label. */ |
46c5ad27 | 134 | void (* internal_label) (FILE *, const char *, unsigned long); |
4977bab6 | 135 | |
617a1b71 PB |
136 | /* Emit a ttype table reference to a typeinfo object. */ |
137 | bool (* ttype) (rtx); | |
138 | ||
93638d7a AM |
139 | /* Emit an assembler directive to set visibility for the symbol |
140 | associated with the tree decl. */ | |
46c5ad27 | 141 | void (* visibility) (tree, int); |
93638d7a | 142 | |
08c148a8 | 143 | /* Output the assembler code for entry to a function. */ |
46c5ad27 | 144 | void (* function_prologue) (FILE *, HOST_WIDE_INT); |
08c148a8 | 145 | |
b4c25db2 | 146 | /* Output the assembler code for end of prologue. */ |
46c5ad27 | 147 | void (* function_end_prologue) (FILE *); |
b4c25db2 NB |
148 | |
149 | /* Output the assembler code for start of epilogue. */ | |
46c5ad27 | 150 | void (* function_begin_epilogue) (FILE *); |
b4c25db2 | 151 | |
08c148a8 | 152 | /* Output the assembler code for function exit. */ |
46c5ad27 | 153 | void (* function_epilogue) (FILE *, HOST_WIDE_INT); |
7c262518 | 154 | |
d6b5193b RS |
155 | /* Initialize target-specific sections. */ |
156 | void (* init_sections) (void); | |
157 | ||
c18a5b6c MM |
158 | /* Tell assembler to change to section NAME with attributes FLAGS. |
159 | If DECL is non-NULL, it is the VAR_DECL or FUNCTION_DECL with | |
160 | which this section is associated. */ | |
161 | void (* named_section) (const char *name, unsigned int flags, tree decl); | |
2cc07db4 | 162 | |
d6b5193b RS |
163 | /* Return a section for EXP. It may be a DECL or a constant. RELOC |
164 | is nonzero if runtime relocations must be applied; bit 1 will be | |
165 | set if the runtime relocations require non-local name resolution. | |
166 | ALIGN is the required alignment of the data. */ | |
167 | section *(* select_section) (tree, int, unsigned HOST_WIDE_INT); | |
ae46c4e0 | 168 | |
d6b5193b RS |
169 | /* Return a section for X. MODE is X's mode and ALIGN is its |
170 | alignment in bits. */ | |
171 | section *(* select_rtx_section) (enum machine_mode, rtx, | |
172 | unsigned HOST_WIDE_INT); | |
b64a1b53 | 173 | |
ae46c4e0 RH |
174 | /* Select a unique section name for DECL. RELOC is the same as |
175 | for SELECT_SECTION. */ | |
46c5ad27 | 176 | void (* unique_section) (tree, int); |
ae46c4e0 | 177 | |
d6b5193b RS |
178 | /* Return the readonly data section associated with function DECL. */ |
179 | section *(* function_rodata_section) (tree); | |
ab5c8549 | 180 | |
2cc07db4 | 181 | /* Output a constructor for a symbol with a given priority. */ |
46c5ad27 | 182 | void (* constructor) (rtx, int); |
2cc07db4 RH |
183 | |
184 | /* Output a destructor for a symbol with a given priority. */ | |
46c5ad27 | 185 | void (* destructor) (rtx, int); |
483ab821 | 186 | |
3961e8fe RH |
187 | /* Output the assembler code for a thunk function. THUNK_DECL is the |
188 | declaration for the thunk function itself, FUNCTION is the decl for | |
189 | the target function. DELTA is an immediate constant offset to be | |
476c5eb6 | 190 | added to THIS. If VCALL_OFFSET is nonzero, the word at |
3961e8fe | 191 | *(*this + vcall_offset) should be added to THIS. */ |
46c5ad27 AJ |
192 | void (* output_mi_thunk) (FILE *file, tree thunk_decl, |
193 | HOST_WIDE_INT delta, HOST_WIDE_INT vcall_offset, | |
194 | tree function_decl); | |
3961e8fe RH |
195 | |
196 | /* Determine whether output_mi_thunk would succeed. */ | |
197 | /* ??? Ideally, this hook would not exist, and success or failure | |
198 | would be returned from output_mi_thunk directly. But there's | |
199 | too much undo-able setup involved in invoking output_mi_thunk. | |
200 | Could be fixed by making output_mi_thunk emit rtl instead of | |
201 | text to the output file. */ | |
46c5ad27 AJ |
202 | bool (* can_output_mi_thunk) (tree thunk_decl, HOST_WIDE_INT delta, |
203 | HOST_WIDE_INT vcall_offset, | |
204 | tree function_decl); | |
a5fe455b | 205 | |
1bc7c5b6 ZW |
206 | /* Output any boilerplate text needed at the beginning of a |
207 | translation unit. */ | |
46c5ad27 | 208 | void (*file_start) (void); |
1bc7c5b6 ZW |
209 | |
210 | /* Output any boilerplate text needed at the end of a | |
211 | translation unit. */ | |
46c5ad27 | 212 | void (*file_end) (void); |
6773a41c RO |
213 | |
214 | /* Output an assembler pseudo-op to declare a library function name | |
215 | external. */ | |
216 | void (*external_libcall) (rtx); | |
8e3e233b | 217 | |
e0d9d0dd | 218 | /* Output an assembler directive to mark decl live. This instructs |
8e3e233b DP |
219 | linker to not dead code strip this symbol. */ |
220 | void (*mark_decl_preserved) (const char *); | |
221 | ||
e0d9d0dd NC |
222 | /* Output a record of the command line switches that have been passed. */ |
223 | print_switch_fn_type record_gcc_switches; | |
224 | /* The name of the section that the example ELF implementation of | |
225 | record_gcc_switches will use to store the information. Target | |
226 | specific versions of record_gcc_switches may or may not use | |
227 | this information. */ | |
228 | const char * record_gcc_switches_section; | |
229 | ||
aacd3885 RS |
230 | /* Output the definition of a section anchor. */ |
231 | void (*output_anchor) (rtx); | |
232 | ||
fdbe66f2 EB |
233 | /* Output a DTP-relative reference to a TLS symbol. */ |
234 | void (*output_dwarf_dtprel) (FILE *file, int size, rtx x); | |
235 | ||
08c148a8 NB |
236 | } asm_out; |
237 | ||
c237e94a ZW |
238 | /* Functions relating to instruction scheduling. */ |
239 | struct sched | |
240 | { | |
241 | /* Given the current cost, COST, of an insn, INSN, calculate and | |
242 | return a new cost based on its relationship to DEP_INSN through | |
243 | the dependence LINK. The default is to make no adjustment. */ | |
46c5ad27 | 244 | int (* adjust_cost) (rtx insn, rtx link, rtx def_insn, int cost); |
c237e94a ZW |
245 | |
246 | /* Adjust the priority of an insn as you see fit. Returns the new | |
247 | priority. */ | |
46c5ad27 | 248 | int (* adjust_priority) (rtx, int); |
c237e94a ZW |
249 | |
250 | /* Function which returns the maximum number of insns that can be | |
251 | scheduled in the same machine cycle. This must be constant | |
252 | over an entire compilation. The default is 1. */ | |
46c5ad27 | 253 | int (* issue_rate) (void); |
c237e94a ZW |
254 | |
255 | /* Calculate how much this insn affects how many more insns we | |
256 | can emit this cycle. Default is they all cost the same. */ | |
46c5ad27 | 257 | int (* variable_issue) (FILE *, int, rtx, int); |
41077ce4 | 258 | |
c237e94a | 259 | /* Initialize machine-dependent scheduling code. */ |
46c5ad27 | 260 | void (* md_init) (FILE *, int, int); |
c237e94a ZW |
261 | |
262 | /* Finalize machine-dependent scheduling code. */ | |
46c5ad27 | 263 | void (* md_finish) (FILE *, int); |
c237e94a | 264 | |
58565a33 SKG |
265 | /* Initialize machine-dependent function while scheduling code. */ |
266 | void (* md_init_global) (FILE *, int, int); | |
267 | ||
268 | /* Finalize machine-dependent function wide scheduling code. */ | |
269 | void (* md_finish_global) (FILE *, int); | |
270 | ||
c237e94a ZW |
271 | /* Reorder insns in a machine-dependent fashion, in two different |
272 | places. Default does nothing. */ | |
46c5ad27 AJ |
273 | int (* reorder) (FILE *, int, rtx *, int *, int); |
274 | int (* reorder2) (FILE *, int, rtx *, int *, int); | |
c237e94a | 275 | |
30028c85 VM |
276 | /* The following member value is a pointer to a function called |
277 | after evaluation forward dependencies of insns in chain given | |
278 | by two parameter values (head and tail correspondingly). */ | |
46c5ad27 | 279 | void (* dependencies_evaluation_hook) (rtx, rtx); |
30028c85 | 280 | |
fae15c93 VM |
281 | /* The values of the following four members are pointers to |
282 | functions used to simplify the automaton descriptions. | |
283 | dfa_pre_cycle_insn and dfa_post_cycle_insn give functions | |
284 | returning insns which are used to change the pipeline hazard | |
285 | recognizer state when the new simulated processor cycle | |
286 | correspondingly starts and finishes. The function defined by | |
287 | init_dfa_pre_cycle_insn and init_dfa_post_cycle_insn are used | |
288 | to initialize the corresponding insns. The default values of | |
d91edf86 | 289 | the members result in not changing the automaton state when |
fae15c93 VM |
290 | the new simulated processor cycle correspondingly starts and |
291 | finishes. */ | |
46c5ad27 AJ |
292 | void (* init_dfa_pre_cycle_insn) (void); |
293 | rtx (* dfa_pre_cycle_insn) (void); | |
294 | void (* init_dfa_post_cycle_insn) (void); | |
295 | rtx (* dfa_post_cycle_insn) (void); | |
fa0aee89 | 296 | |
fae15c93 VM |
297 | /* The following member value is a pointer to a function returning value |
298 | which defines how many insns in queue `ready' will we try for | |
5ad6fca5 | 299 | multi-pass scheduling. If the member value is nonzero and the |
fae15c93 VM |
300 | function returns positive value, the DFA based scheduler will make |
301 | multi-pass scheduling for the first cycle. In other words, we will | |
302 | try to choose ready insn which permits to start maximum number of | |
303 | insns on the same cycle. */ | |
46c5ad27 | 304 | int (* first_cycle_multipass_dfa_lookahead) (void); |
fa0aee89 | 305 | |
30028c85 VM |
306 | /* The following member value is pointer to a function controlling |
307 | what insns from the ready insn queue will be considered for the | |
308 | multipass insn scheduling. If the hook returns zero for insn | |
309 | passed as the parameter, the insn will be not chosen to be | |
310 | issued. */ | |
46c5ad27 | 311 | int (* first_cycle_multipass_dfa_lookahead_guard) (rtx); |
fa0aee89 | 312 | |
30028c85 VM |
313 | /* The following member value is pointer to a function called by |
314 | the insn scheduler before issuing insn passed as the third | |
315 | parameter on given cycle. If the hook returns nonzero, the | |
316 | insn is not issued on given processors cycle. Instead of that, | |
317 | the processor cycle is advanced. If the value passed through | |
318 | the last parameter is zero, the insn ready queue is not sorted | |
319 | on the new cycle start as usually. The first parameter passes | |
320 | file for debugging output. The second one passes the scheduler | |
321 | verbose level of the debugging output. The forth and the fifth | |
322 | parameter values are correspondingly processor cycle on which | |
323 | the previous insn has been issued and the current processor | |
324 | cycle. */ | |
46c5ad27 | 325 | int (* dfa_new_cycle) (FILE *, int, rtx, int, int, int *); |
fa0aee89 | 326 | |
569fa502 DN |
327 | /* The following member value is a pointer to a function called |
328 | by the insn scheduler. It should return true if there exists a | |
f676971a EC |
329 | dependence which is considered costly by the target, between |
330 | the insn passed as the first parameter, and the insn passed as | |
331 | the second parameter. The third parameter is the INSN_DEPEND | |
569fa502 DN |
332 | link that represents the dependence between the two insns. The |
333 | fourth argument is the cost of the dependence as estimated by | |
f676971a | 334 | the scheduler. The last argument is the distance in cycles |
569fa502 | 335 | between the already scheduled insn (first parameter) and the |
80fcc7bc SB |
336 | the second insn (second parameter). */ |
337 | bool (* is_costly_dependence) (rtx, rtx, rtx, int, int); | |
496d7bb0 MK |
338 | |
339 | /* Given the current cost, COST, of an insn, INSN, calculate and | |
340 | return a new cost based on its relationship to DEP_INSN through the | |
341 | dependence of type DEP_TYPE. The default is to make no adjustment. */ | |
342 | int (* adjust_cost_2) (rtx insn, int, rtx def_insn, int cost); | |
343 | ||
344 | /* The following member value is a pointer to a function called | |
345 | by the insn scheduler. This hook is called to notify the backend | |
346 | that new instructions were emitted. */ | |
347 | void (* h_i_d_extended) (void); | |
348 | ||
349 | /* The following member value is a pointer to a function called | |
350 | by the insn scheduler. | |
351 | The first parameter is an instruction, the second parameter is the type | |
352 | of the requested speculation, and the third parameter is a pointer to the | |
353 | speculative pattern of the corresponding type (set if return value == 1). | |
354 | It should return | |
355 | -1, if there is no pattern, that will satisfy the requested speculation | |
356 | type, | |
357 | 0, if current pattern satisfies the requested speculation type, | |
358 | 1, if pattern of the instruction should be changed to the newly | |
359 | generated one. */ | |
c7ec5472 | 360 | int (* speculate_insn) (rtx, int, rtx *); |
496d7bb0 MK |
361 | |
362 | /* The following member value is a pointer to a function called | |
363 | by the insn scheduler. It should return true if the check instruction | |
364 | corresponding to the instruction passed as the parameter needs a | |
365 | recovery block. */ | |
366 | bool (* needs_block_p) (rtx); | |
367 | ||
368 | /* The following member value is a pointer to a function called | |
369 | by the insn scheduler. It should return a pattern for the check | |
370 | instruction. | |
371 | The first parameter is a speculative instruction, the second parameter | |
372 | is the label of the corresponding recovery block (or null, if it is a | |
373 | simple check). If the mutation of the check is requested (e.g. from | |
374 | ld.c to chk.a), the third parameter is true - in this case the first | |
375 | parameter is the previous check. */ | |
376 | rtx (* gen_check) (rtx, rtx, bool); | |
377 | ||
378 | /* The following member value is a pointer to a function controlling | |
379 | what insns from the ready insn queue will be considered for the | |
380 | multipass insn scheduling. If the hook returns zero for the insn | |
381 | passed as the parameter, the insn will not be chosen to be | |
382 | issued. This hook is used to discard speculative instructions, | |
383 | that stand at the first position of the ready list. */ | |
384 | bool (* first_cycle_multipass_dfa_lookahead_guard_spec) (rtx); | |
385 | ||
386 | /* The following member value is a pointer to a function that provides | |
387 | information about the speculation capabilities of the target. | |
388 | The parameter is a pointer to spec_info variable. */ | |
389 | void (* set_sched_flags) (struct spec_info_def *); | |
c237e94a ZW |
390 | } sched; |
391 | ||
7ccf35ed DN |
392 | /* Functions relating to vectorization. */ |
393 | struct vectorize | |
394 | { | |
d16b59fa | 395 | /* The following member value is a pointer to a function called |
7ccf35ed DN |
396 | by the vectorizer, and return the decl of the target builtin |
397 | function. */ | |
398 | tree (* builtin_mask_for_load) (void); | |
89d67cca | 399 | |
2505a3f2 RG |
400 | /* Returns a code for builtin that realizes vectorized version of |
401 | function, or NULL_TREE if not available. */ | |
402 | tree (* builtin_vectorized_function) (unsigned, tree); | |
403 | ||
89d67cca DN |
404 | /* Target builtin that implements vector widening multiplication. |
405 | builtin_mul_widen_eve computes the element-by-element products | |
406 | for the even elements, and builtin_mul_widen_odd computes the | |
407 | element-by-element products for the odd elements. */ | |
408 | tree (* builtin_mul_widen_even) (tree); | |
409 | tree (* builtin_mul_widen_odd) (tree); | |
7ccf35ed DN |
410 | } vectorize; |
411 | ||
75685792 RS |
412 | /* The initial value of target_flags. */ |
413 | int default_target_flags; | |
414 | ||
415 | /* Handle target switch CODE (an OPT_* value). ARG is the argument | |
416 | passed to the switch; it is NULL if no argument was. VALUE is the | |
417 | value of ARG if CODE specifies a UInteger option, otherwise it is | |
418 | 1 if the positive form of the switch was used and 0 if the negative | |
419 | form was. Return true if the switch was valid. */ | |
420 | bool (* handle_option) (size_t code, const char *arg, int value); | |
421 | ||
8c27b7d4 | 422 | /* Return machine mode for filter value. */ |
93f90be6 FJ |
423 | enum machine_mode (* eh_return_filter_mode) (void); |
424 | ||
672a6f42 | 425 | /* Given two decls, merge their attributes and return the result. */ |
46c5ad27 | 426 | tree (* merge_decl_attributes) (tree, tree); |
672a6f42 NB |
427 | |
428 | /* Given two types, merge their attributes and return the result. */ | |
46c5ad27 | 429 | tree (* merge_type_attributes) (tree, tree); |
672a6f42 | 430 | |
349ae713 NB |
431 | /* Table of machine attributes and functions to handle them. |
432 | Ignored if NULL. */ | |
91d231cb | 433 | const struct attribute_spec *attribute_table; |
8d8e52be JM |
434 | |
435 | /* Return zero if the attributes on TYPE1 and TYPE2 are incompatible, | |
436 | one if they are compatible and two if they are nearly compatible | |
437 | (which causes a warning to be generated). */ | |
46c5ad27 | 438 | int (* comp_type_attributes) (tree type1, tree type2); |
8d8e52be JM |
439 | |
440 | /* Assign default attributes to the newly defined TYPE. */ | |
46c5ad27 | 441 | void (* set_default_type_attributes) (tree type); |
12a68f1f JM |
442 | |
443 | /* Insert attributes on the newly created DECL. */ | |
46c5ad27 | 444 | void (* insert_attributes) (tree decl, tree *attributes); |
f6155fda | 445 | |
91d231cb JM |
446 | /* Return true if FNDECL (which has at least one machine attribute) |
447 | can be inlined despite its machine attributes, false otherwise. */ | |
46c5ad27 | 448 | bool (* function_attribute_inlinable_p) (tree fndecl); |
91d231cb | 449 | |
f913c102 AO |
450 | /* Return true if bitfields in RECORD_TYPE should follow the |
451 | Microsoft Visual C++ bitfield layout rules. */ | |
46c5ad27 | 452 | bool (* ms_bitfield_layout_p) (tree record_type); |
f913c102 | 453 | |
9a8ce21f JG |
454 | /* True if the target supports decimal floating point. */ |
455 | bool (* decimal_float_supported_p) (void); | |
456 | ||
13c1cd82 PB |
457 | /* Return true if anonymous bitfields affect structure alignment. */ |
458 | bool (* align_anon_bitfield) (void); | |
459 | ||
c2a64439 PB |
460 | /* Return true if volatile bitfields should use the narrowest type possible. |
461 | Return false if they should use the container type. */ | |
462 | bool (* narrow_volatile_bitfield) (void); | |
463 | ||
f6155fda | 464 | /* Set up target-specific built-in functions. */ |
46c5ad27 | 465 | void (* init_builtins) (void); |
f6155fda SS |
466 | |
467 | /* Expand a target-specific builtin. */ | |
46c5ad27 AJ |
468 | rtx (* expand_builtin) (tree exp, rtx target, rtx subtarget, |
469 | enum machine_mode mode, int ignore); | |
7c262518 | 470 | |
58646b77 PB |
471 | /* Select a replacement for a target-specific builtin. This is done |
472 | *before* regular type checking, and so allows the target to implement | |
473 | a crude form of function overloading. The result is a complete | |
474 | expression that implements the operation. */ | |
475 | tree (*resolve_overloaded_builtin) (tree decl, tree params); | |
476 | ||
c2dda19b | 477 | /* Fold a target-specific builtin. */ |
a05a80fc | 478 | tree (* fold_builtin) (tree fndecl, tree arglist, bool ignore); |
083cad55 | 479 | |
f18eca82 ZL |
480 | /* For a vendor-specific fundamental TYPE, return a pointer to |
481 | a statically-allocated string containing the C++ mangling for | |
482 | TYPE. In all other cases, return NULL. */ | |
483 | const char * (* mangle_fundamental_type) (tree type); | |
484 | ||
c15c90bb ZW |
485 | /* Make any adjustments to libfunc names needed for this target. */ |
486 | void (* init_libfuncs) (void); | |
487 | ||
7c262518 RH |
488 | /* Given a decl, a section name, and whether the decl initializer |
489 | has relocs, choose attributes for the section. */ | |
490 | /* ??? Should be merged with SELECT_SECTION and UNIQUE_SECTION. */ | |
46c5ad27 | 491 | unsigned int (* section_type_flags) (tree, const char *, int); |
7c262518 | 492 | |
e4ec2cac AO |
493 | /* True if new jumps cannot be created, to replace existing ones or |
494 | not, at the current point in the compilation. */ | |
46c5ad27 | 495 | bool (* cannot_modify_jumps_p) (void); |
ae46c4e0 | 496 | |
a3424f5c RH |
497 | /* Return a register class for which branch target register |
498 | optimizations should be applied. */ | |
46c5ad27 | 499 | int (* branch_target_register_class) (void); |
a3424f5c RH |
500 | |
501 | /* Return true if branch target register optimizations should include | |
502 | callee-saved registers that are not already live during the current | |
503 | function. AFTER_PE_GEN is true if prologues and epilogues have | |
504 | already been generated. */ | |
46c5ad27 | 505 | bool (* branch_target_register_callee_saved) (bool after_pe_gen); |
fe3ad572 | 506 | |
3a04ff64 | 507 | /* True if the constant X cannot be placed in the constant pool. */ |
46c5ad27 | 508 | bool (* cannot_force_const_mem) (rtx); |
3a04ff64 | 509 | |
0b077eac | 510 | /* True if the insn X cannot be duplicated. */ |
46c5ad27 | 511 | bool (* cannot_copy_insn_p) (rtx); |
0b077eac | 512 | |
8ddf681a R |
513 | /* True if X is considered to be commutative. */ |
514 | bool (* commutative_p) (rtx, int); | |
515 | ||
7daebb7a | 516 | /* Given an address RTX, undo the effects of LEGITIMIZE_ADDRESS. */ |
46c5ad27 | 517 | rtx (* delegitimize_address) (rtx); |
7daebb7a | 518 | |
aacd3885 RS |
519 | /* True if the given constant can be put into an object_block. */ |
520 | bool (* use_blocks_for_constant_p) (enum machine_mode, rtx); | |
521 | ||
522 | /* The minimum and maximum byte offsets for anchored addresses. */ | |
523 | HOST_WIDE_INT min_anchor_offset; | |
524 | HOST_WIDE_INT max_anchor_offset; | |
525 | ||
526 | /* True if section anchors can be used to access the given symbol. */ | |
527 | bool (* use_anchors_for_symbol_p) (rtx); | |
528 | ||
4977bab6 ZW |
529 | /* True if it is OK to do sibling call optimization for the specified |
530 | call expression EXP. DECL will be the called function, or NULL if | |
531 | this is an indirect call. */ | |
46c5ad27 AJ |
532 | bool (*function_ok_for_sibcall) (tree decl, tree exp); |
533 | ||
ae46c4e0 | 534 | /* True if EXP should be placed in a "small data" section. */ |
46c5ad27 | 535 | bool (* in_small_data_p) (tree); |
fb49053f | 536 | |
47754fd5 RH |
537 | /* True if EXP names an object for which name resolution must resolve |
538 | to the current module. */ | |
46c5ad27 | 539 | bool (* binds_local_p) (tree); |
47754fd5 | 540 | |
fb49053f RH |
541 | /* Do something target-specific to record properties of the DECL into |
542 | the associated SYMBOL_REF. */ | |
46c5ad27 | 543 | void (* encode_section_info) (tree, rtx, int); |
772c5265 RH |
544 | |
545 | /* Undo the effects of encode_section_info on the symbol string. */ | |
46c5ad27 | 546 | const char * (* strip_name_encoding) (const char *); |
47754fd5 | 547 | |
273a2526 RS |
548 | /* If shift optabs for MODE are known to always truncate the shift count, |
549 | return the mask that they apply. Return 0 otherwise. */ | |
550 | unsigned HOST_WIDE_INT (* shift_truncation_mask) (enum machine_mode mode); | |
551 | ||
bc23502b PB |
552 | /* Return the number of divisions in the given MODE that should be present, |
553 | so that it is profitable to turn the division into a multiplication by | |
554 | the reciprocal. */ | |
555 | unsigned int (* min_divisions_for_recip_mul) (enum machine_mode mode); | |
556 | ||
b12cbf2c AN |
557 | /* If the representation of integral MODE is such that values are |
558 | always sign-extended to a wider mode MODE_REP then return | |
559 | SIGN_EXTEND. Return UNKNOWN otherwise. */ | |
560 | /* Note that the return type ought to be RTX_CODE, but that's not | |
561 | necessarily defined at this point. */ | |
562 | int (* mode_rep_extended) (enum machine_mode mode, | |
563 | enum machine_mode mode_rep); | |
564 | ||
3c50106f | 565 | /* True if MODE is valid for a pointer in __attribute__((mode("MODE"))). */ |
46c5ad27 | 566 | bool (* valid_pointer_mode) (enum machine_mode mode); |
3c50106f | 567 | |
6dd53648 RH |
568 | /* True if MODE is valid for the target. By "valid", we mean able to |
569 | be manipulated in non-trivial ways. In particular, this means all | |
570 | the arithmetic is supported. */ | |
571 | bool (* scalar_mode_supported_p) (enum machine_mode mode); | |
572 | ||
573 | /* Similarly for vector modes. "Supported" here is less strict. At | |
574 | least some operations are supported; need to check optabs or builtins | |
575 | for further details. */ | |
f676971a EC |
576 | bool (* vector_mode_supported_p) (enum machine_mode mode); |
577 | ||
c8e4f0e9 | 578 | /* True if a vector is opaque. */ |
46c5ad27 | 579 | bool (* vector_opaque_p) (tree); |
62e1dfcf | 580 | |
3c50106f RH |
581 | /* Compute a (partial) cost for rtx X. Return true if the complete |
582 | cost has been computed, and false if subexpressions should be | |
583 | scanned. In either case, *TOTAL contains the cost result. */ | |
584 | /* Note that CODE and OUTER_CODE ought to be RTX_CODE, but that's | |
585 | not necessarily defined at this point. */ | |
46c5ad27 | 586 | bool (* rtx_costs) (rtx x, int code, int outer_code, int *total); |
3c50106f | 587 | |
dcefdf67 RH |
588 | /* Compute the cost of X, used as an address. Never called with |
589 | invalid addresses. */ | |
46c5ad27 | 590 | int (* address_cost) (rtx x); |
dcefdf67 | 591 | |
b48f503c KK |
592 | /* Return where to allocate pseudo for a given hard register initial |
593 | value. */ | |
594 | rtx (* allocate_initial_value) (rtx x); | |
595 | ||
96714395 AH |
596 | /* Given a register, this hook should return a parallel of registers |
597 | to represent where to find the register pieces. Define this hook | |
598 | if the register and its mode are represented in Dwarf in | |
599 | non-contiguous locations, or if the register should be | |
600 | represented in more than one register in Dwarf. Otherwise, this | |
601 | hook should return NULL_RTX. */ | |
46c5ad27 | 602 | rtx (* dwarf_register_span) (rtx); |
96714395 | 603 | |
e129d93a ILT |
604 | /* Fetch the fixed register(s) which hold condition codes, for |
605 | targets where it makes sense to look for duplicate assignments to | |
606 | the condition codes. This should return true if there is such a | |
607 | register, false otherwise. The arguments should be set to the | |
608 | fixed register numbers. Up to two condition code registers are | |
609 | supported. If there is only one for this target, the int pointed | |
610 | at by the second argument should be set to -1. */ | |
611 | bool (* fixed_condition_code_regs) (unsigned int *, unsigned int *); | |
612 | ||
613 | /* If two condition code modes are compatible, return a condition | |
614 | code mode which is compatible with both, such that a comparison | |
615 | done in the returned mode will work for both of the original | |
616 | modes. If the condition code modes are not compatible, return | |
617 | VOIDmode. */ | |
618 | enum machine_mode (* cc_modes_compatible) (enum machine_mode, | |
619 | enum machine_mode); | |
620 | ||
18dbd950 RS |
621 | /* Do machine-dependent code transformations. Called just before |
622 | delayed-branch scheduling. */ | |
46c5ad27 | 623 | void (* machine_dependent_reorg) (void); |
18dbd950 | 624 | |
c35d187f RH |
625 | /* Create the __builtin_va_list type. */ |
626 | tree (* build_builtin_va_list) (void); | |
627 | ||
cdc3ddb8 RH |
628 | /* Gimplifies a VA_ARG_EXPR. */ |
629 | tree (* gimplify_va_arg_expr) (tree valist, tree type, tree *pre_p, | |
630 | tree *post_p); | |
631 | ||
7bb1ad93 GK |
632 | /* Validity-checking routines for PCH files, target-specific. |
633 | get_pch_validity returns a pointer to the data to be stored, | |
634 | and stores the size in its argument. pch_valid_p gets the same | |
635 | information back and returns NULL if the PCH is valid, | |
636 | or an error message if not. | |
637 | */ | |
638 | void * (* get_pch_validity) (size_t *); | |
639 | const char * (* pch_valid_p) (const void *, size_t); | |
640 | ||
8d932be3 RS |
641 | /* If nonnull, this function checks whether a PCH file with the |
642 | given set of target flags can be used. It returns NULL if so, | |
643 | otherwise it returns an error message. */ | |
644 | const char *(*check_pch_target_flags) (int); | |
645 | ||
a841ab8b | 646 | /* True if the compiler should give an enum type only as many |
221ee7c9 KH |
647 | bytes as it takes to represent the range of possible values of |
648 | that type. */ | |
649 | bool (* default_short_enums) (void); | |
650 | ||
d6da68b9 | 651 | /* This target hook returns an rtx that is used to store the address |
a841ab8b | 652 | of the current frame into the built-in setjmp buffer. */ |
d6da68b9 KH |
653 | rtx (* builtin_setjmp_frame_value) (void); |
654 | ||
67dfe110 | 655 | /* This target hook should add STRING_CST trees for any hard regs |
61158923 HPN |
656 | the port wishes to automatically clobber for an asm. */ |
657 | tree (* md_asm_clobbers) (tree, tree, tree); | |
67dfe110 | 658 | |
a1c496cb EC |
659 | /* This target hook allows the backend to specify a calling convention |
660 | in the debug information. This function actually returns an | |
661 | enum dwarf_calling_convention, but because of forward declarations | |
662 | and not wanting to include dwarf2.h everywhere target.h is included | |
663 | the function is being declared as an int. */ | |
664 | int (* dwarf_calling_convention) (tree); | |
665 | ||
e54c7471 EB |
666 | /* This target hook allows the backend to emit frame-related insns that |
667 | contain UNSPECs or UNSPEC_VOLATILEs. The call frame debugging info | |
668 | engine will invoke it on insns of the form | |
669 | (set (reg) (unspec [...] UNSPEC_INDEX)) | |
670 | and | |
671 | (set (reg) (unspec_volatile [...] UNSPECV_INDEX)) | |
672 | to let the backend emit the call frame instructions. */ | |
673 | void (* dwarf_handle_frame_unspec) (const char *, rtx, int); | |
674 | ||
9d30f3c1 JJ |
675 | /* Perform architecture specific checking of statements gimplified |
676 | from VA_ARG_EXPR. LHS is left hand side of MODIFY_EXPR, RHS | |
677 | is right hand side. Returns true if the statements doesn't need | |
678 | to be checked for va_list references. */ | |
7d69de61 RH |
679 | bool (* stdarg_optimize_hook) (struct stdarg_info *ai, tree lhs, tree rhs); |
680 | ||
681 | /* This target hook allows the operating system to override the DECL | |
682 | that represents the external variable that contains the stack | |
683 | protection guard variable. The type of this DECL is ptr_type_node. */ | |
684 | tree (* stack_protect_guard) (void); | |
685 | ||
686 | /* This target hook allows the operating system to override the CALL_EXPR | |
687 | that is invoked when a check vs the guard variable fails. */ | |
688 | tree (* stack_protect_fail) (void); | |
9d30f3c1 | 689 | |
e7e64a25 AS |
690 | /* Returns NULL if target supports the insn within a doloop block, |
691 | otherwise it returns an error message. */ | |
692 | const char * (*invalid_within_doloop) (rtx); | |
43d9ad1d DS |
693 | |
694 | /* DECL is a variable or function with __attribute__((dllimport)) | |
695 | specified. Use this hook if the target needs to add extra validation | |
696 | checks to handle_dll_attribute (). */ | |
697 | bool (* valid_dllimport_attribute_p) (tree decl); | |
083cad55 | 698 | |
42ba5130 RH |
699 | /* Functions relating to calls - argument passing, returns, etc. */ |
700 | struct calls { | |
701 | bool (*promote_function_args) (tree fntype); | |
702 | bool (*promote_function_return) (tree fntype); | |
703 | bool (*promote_prototypes) (tree fntype); | |
704 | rtx (*struct_value_rtx) (tree fndecl, int incoming); | |
705 | bool (*return_in_memory) (tree type, tree fndecl); | |
706 | bool (*return_in_msb) (tree type); | |
8cd5a4e0 RH |
707 | |
708 | /* Return true if a parameter must be passed by reference. TYPE may | |
709 | be null if this is a libcall. CA may be null if this query is | |
710 | from __builtin_va_arg. */ | |
711 | bool (*pass_by_reference) (CUMULATIVE_ARGS *ca, enum machine_mode mode, | |
712 | tree type, bool named_arg); | |
713 | ||
42ba5130 RH |
714 | rtx (*expand_builtin_saveregs) (void); |
715 | /* Returns pretend_argument_size. */ | |
716 | void (*setup_incoming_varargs) (CUMULATIVE_ARGS *ca, enum machine_mode mode, | |
717 | tree type, int *pretend_arg_size, | |
718 | int second_time); | |
719 | bool (*strict_argument_naming) (CUMULATIVE_ARGS *ca); | |
720 | /* Returns true if we should use | |
721 | targetm.calls.setup_incoming_varargs() and/or | |
722 | targetm.calls.strict_argument_naming(). */ | |
723 | bool (*pretend_outgoing_varargs_named) (CUMULATIVE_ARGS *ca); | |
724 | ||
725 | /* Given a complex type T, return true if a parameter of type T | |
726 | should be passed as two scalars. */ | |
727 | bool (* split_complex_arg) (tree type); | |
fe984136 RH |
728 | |
729 | /* Return true if type T, mode MODE, may not be passed in registers, | |
730 | but must be passed on the stack. */ | |
731 | /* ??? This predicate should be applied strictly after pass-by-reference. | |
732 | Need audit to verify that this is the case. */ | |
733 | bool (* must_pass_in_stack) (enum machine_mode mode, tree t); | |
6cdd5672 RH |
734 | |
735 | /* Return true if type TYPE, mode MODE, which is passed by reference, | |
736 | should have the object copy generated by the callee rather than | |
737 | the caller. It is never called for TYPE requiring constructors. */ | |
738 | bool (* callee_copies) (CUMULATIVE_ARGS *ca, enum machine_mode mode, | |
739 | tree type, bool named); | |
78a52f11 RH |
740 | |
741 | /* Return zero for arguments passed entirely on the stack or entirely | |
742 | in registers. If passed in both, return the number of bytes passed | |
743 | in registers; the balance is therefore passed on the stack. */ | |
744 | int (* arg_partial_bytes) (CUMULATIVE_ARGS *ca, enum machine_mode mode, | |
745 | tree type, bool named); | |
4d3e6fae FJ |
746 | |
747 | /* Return the diagnostic message string if function without a prototype | |
748 | is not allowed for this 'val' argument; NULL otherwise. */ | |
083cad55 | 749 | const char *(*invalid_arg_for_unprototyped_fn) (tree typelist, |
4d3e6fae | 750 | tree funcdecl, tree val); |
1d636cc6 RG |
751 | |
752 | /* Return an rtx for the return value location of the function | |
753 | specified by FN_DECL_OR_TYPE with a return type of RET_TYPE. */ | |
754 | rtx (*function_value) (tree ret_type, tree fn_decl_or_type, | |
755 | bool outgoing); | |
150cdc9e RH |
756 | |
757 | /* Return an rtx for the argument pointer incoming to the | |
758 | current function. */ | |
759 | rtx (*internal_arg_pointer) (void); | |
42ba5130 RH |
760 | } calls; |
761 | ||
4de67c26 JM |
762 | /* Return the diagnostic message string if conversion from FROMTYPE |
763 | to TOTYPE is not allowed, NULL otherwise. */ | |
764 | const char *(*invalid_conversion) (tree fromtype, tree totype); | |
765 | ||
766 | /* Return the diagnostic message string if the unary operation OP is | |
767 | not permitted on TYPE, NULL otherwise. */ | |
768 | const char *(*invalid_unary_op) (int op, tree type); | |
769 | ||
770 | /* Return the diagnostic message string if the binary operation OP | |
771 | is not permitted on TYPE1 and TYPE2, NULL otherwise. */ | |
772 | const char *(*invalid_binary_op) (int op, tree type1, tree type2); | |
773 | ||
8a99f6f9 R |
774 | /* Return the class for a secondary reload, and fill in extra information. */ |
775 | enum reg_class (*secondary_reload) (bool, rtx, enum reg_class, | |
776 | enum machine_mode, | |
777 | struct secondary_reload_info *); | |
778 | ||
4185ae53 PB |
779 | /* Functions specific to the C++ frontend. */ |
780 | struct cxx { | |
781 | /* Return the integer type used for guard variables. */ | |
782 | tree (*guard_type) (void); | |
783 | /* Return true if only the low bit of the guard should be tested. */ | |
784 | bool (*guard_mask_bit) (void); | |
46e995e0 PB |
785 | /* Returns the size of the array cookie for an array of type. */ |
786 | tree (*get_cookie_size) (tree); | |
787 | /* Returns true if the element size should be stored in the | |
788 | array cookie. */ | |
789 | bool (*cookie_has_size) (void); | |
d59c7b4b NC |
790 | /* Allows backends to perform additional processing when |
791 | deciding if a class should be exported or imported. */ | |
792 | int (*import_export_class) (tree, int); | |
44d10c10 PB |
793 | /* Returns true if constructors and destructors return "this". */ |
794 | bool (*cdtor_returns_this) (void); | |
af287697 MM |
795 | /* Returns true if the key method for a class can be an inline |
796 | function, so long as it is not declared inline in the class | |
797 | itself. Returning true is the behavior required by the Itanium | |
798 | C++ ABI. */ | |
799 | bool (*key_method_may_be_inline) (void); | |
1e731102 MM |
800 | /* DECL is a virtual table, virtual table table, typeinfo object, |
801 | or other similar implicit class data object that will be | |
802 | emitted with external linkage in this translation unit. No ELF | |
803 | visibility has been explicitly specified. If the target needs | |
804 | to specify a visibility other than that of the containing class, | |
805 | use this hook to set DECL_VISIBILITY and | |
083cad55 | 806 | DECL_VISIBILITY_SPECIFIED. */ |
1e731102 MM |
807 | void (*determine_class_data_visibility) (tree decl); |
808 | /* Returns true (the default) if virtual tables and other | |
809 | similar implicit class data objects are always COMDAT if they | |
810 | have external linkage. If this hook returns false, then | |
811 | class data for classes whose virtual table will be emitted in | |
812 | only one translation unit will not be COMDAT. */ | |
813 | bool (*class_data_always_comdat) (void); | |
157600d0 GK |
814 | /* Returns true (the default) if the RTTI for the basic types, |
815 | which is always defined in the C++ runtime, should be COMDAT; | |
816 | false if it should not be COMDAT. */ | |
817 | bool (*library_rtti_comdat) (void); | |
9f62c3e3 PB |
818 | /* Returns true if __aeabi_atexit should be used to register static |
819 | destructors. */ | |
820 | bool (*use_aeabi_atexit) (void); | |
97388150 DS |
821 | /* Returns true if target may use atexit in the same manner as |
822 | __cxa_atexit to register static destructors. */ | |
823 | bool (*use_atexit_for_cxa_atexit) (void); | |
43d9ad1d DS |
824 | /* TYPE is a C++ class (i.e., RECORD_TYPE or UNION_TYPE) that |
825 | has just been defined. Use this hook to make adjustments to the | |
826 | class (eg, tweak visibility or perform any other required | |
083cad55 | 827 | target modifications). */ |
43d9ad1d | 828 | void (*adjust_class_at_definition) (tree type); |
4185ae53 | 829 | } cxx; |
e0d9d0dd | 830 | |
912f2dac DB |
831 | /* For targets that need to mark extra registers as live on entry to |
832 | the function, they should define this target hook and set their | |
833 | bits in the bitmap passed in. */ | |
834 | void (*live_on_entry) (bitmap); | |
4185ae53 | 835 | |
617a1b71 PB |
836 | /* True if unwinding tables should be generated by default. */ |
837 | bool unwind_tables_default; | |
838 | ||
47754fd5 RH |
839 | /* Leave the boolean fields at the end. */ |
840 | ||
841 | /* True if arbitrary sections are supported. */ | |
842 | bool have_named_sections; | |
843 | ||
434aeebb RS |
844 | /* True if we can create zeroed data by switching to a BSS section |
845 | and then using ASM_OUTPUT_SKIP to allocate the space. */ | |
846 | bool have_switchable_bss_sections; | |
847 | ||
47754fd5 RH |
848 | /* True if "native" constructors and destructors are supported, |
849 | false if we're using collect2 for the job. */ | |
850 | bool have_ctors_dtors; | |
3d78f2e9 RH |
851 | |
852 | /* True if thread-local storage is supported. */ | |
853 | bool have_tls; | |
275b6d80 DE |
854 | |
855 | /* True if a small readonly data section is supported. */ | |
856 | bool have_srodata_section; | |
7606e68f SS |
857 | |
858 | /* True if EH frame info sections should be zero-terminated. */ | |
859 | bool terminate_dw2_eh_frame_info; | |
1bc7c5b6 ZW |
860 | |
861 | /* True if #NO_APP should be emitted at the beginning of | |
862 | assembly output. */ | |
863 | bool file_start_app_off; | |
864 | ||
865 | /* True if output_file_directive should be called for main_input_filename | |
866 | at the beginning of assembly output. */ | |
867 | bool file_start_file_directive; | |
61f71b34 | 868 | |
84b8b0e0 ZW |
869 | /* True if #pragma redefine_extname is to be supported. */ |
870 | bool handle_pragma_redefine_extname; | |
871 | ||
872 | /* True if #pragma extern_prefix is to be supported. */ | |
873 | bool handle_pragma_extern_prefix; | |
874 | ||
445cf5eb JM |
875 | /* True if the target is allowed to reorder memory accesses unless |
876 | synchronization is explicitly requested. */ | |
877 | bool relaxed_ordering; | |
878 | ||
617a1b71 PB |
879 | /* Returns true if we should generate exception tables for use with the |
880 | ARM EABI. The effects the encoding of function exception specifications. | |
881 | */ | |
882 | bool arm_eabi_unwinder; | |
883 | ||
42ba5130 | 884 | /* Leave the boolean fields at the end. */ |
672a6f42 NB |
885 | }; |
886 | ||
f6897b10 | 887 | extern struct gcc_target targetm; |
59587b18 JQ |
888 | |
889 | #endif /* GCC_TARGET_H */ |