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Commit | Line | Data |
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1322177d | 1 | /* Compilation switch flag definitions for GCC. |
e295f317 | 2 | Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, |
1194fc79 | 3 | 2003, 2004 |
06ceef4e | 4 | Free Software Foundation, Inc. |
f7a29665 | 5 | |
1322177d | 6 | This file is part of GCC. |
f7a29665 | 7 | |
1322177d LB |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 2, or (at your option) any later | |
11 | version. | |
f7a29665 | 12 | |
1322177d LB |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
f7a29665 RS |
17 | |
18 | You should have received a copy of the GNU General Public License | |
1322177d LB |
19 | along with GCC; see the file COPYING. If not, write to the Free |
20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
f7a29665 | 22 | |
0e5921e8 ZW |
23 | #ifndef GCC_FLAGS_H |
24 | #define GCC_FLAGS_H | |
25 | ||
f7a29665 RS |
26 | enum debug_info_type |
27 | { | |
28 | NO_DEBUG, /* Write no debug info. */ | |
29 | DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */ | |
30 | SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */ | |
d45cf215 | 31 | DWARF_DEBUG, /* Write Dwarf debug info (using dwarfout.c). */ |
9a666dda | 32 | DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */ |
7a0c8d71 | 33 | XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */ |
23d1aac4 | 34 | VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */ |
7a0c8d71 | 35 | VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c). |
23d1aac4 | 36 | and DWARF v2 debug info (using dwarf2out.c). */ |
f7a29665 RS |
37 | }; |
38 | ||
39 | /* Specify which kind of debugging info to generate. */ | |
40 | extern enum debug_info_type write_symbols; | |
41 | ||
df026186 GK |
42 | /* Names of debug_info_type, for error messages. */ |
43 | extern const char *const debug_type_names[]; | |
44 | ||
f7a29665 RS |
45 | enum debug_info_level |
46 | { | |
47 | DINFO_LEVEL_NONE, /* Write no debugging info. */ | |
48 | DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */ | |
eebedaa5 | 49 | DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */ |
f7a29665 RS |
50 | DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */ |
51 | }; | |
52 | ||
53 | /* Specify how much debugging info to generate. */ | |
54 | extern enum debug_info_level debug_info_level; | |
55 | ||
79604d8f CH |
56 | /* Nonzero means use GNU-only extensions in the generated symbolic |
57 | debugging information. */ | |
df38ffef | 58 | extern bool use_gnu_debug_info_extensions; |
f7a29665 | 59 | |
45751525 RE |
60 | /* Nonzero means emit debugging information only for symbols which are used. */ |
61 | extern int flag_debug_only_used_symbols; | |
62 | ||
f7a29665 RS |
63 | /* Nonzero means do optimizations. -opt. */ |
64 | ||
65 | extern int optimize; | |
66 | ||
c6aded7c AG |
67 | /* Nonzero means optimize for size. -Os. */ |
68 | ||
69 | extern int optimize_size; | |
70 | ||
f7a29665 RS |
71 | /* Don't print functions as they are compiled and don't print |
72 | times taken by the various passes. -quiet. */ | |
73 | ||
74 | extern int quiet_flag; | |
75 | ||
fba0bfd4 ZW |
76 | /* Print memory still in use at end of compilation (which may have little |
77 | to do with peak memory consumption). -fmem-report. */ | |
78 | ||
79 | extern int mem_report; | |
80 | ||
f7a29665 RS |
81 | /* Don't print warning messages. -w. */ |
82 | ||
e01cc6dc | 83 | extern bool inhibit_warnings; |
f7a29665 | 84 | |
317639a8 BC |
85 | /* Don't suppress warnings from system headers. -Wsystem-headers. */ |
86 | ||
e01cc6dc | 87 | extern bool warn_system_headers; |
317639a8 | 88 | |
65ca2d60 PE |
89 | /* Do print extra warnings (such as for uninitialized variables). |
90 | -W/-Wextra. */ | |
f7a29665 | 91 | |
e01cc6dc NB |
92 | extern bool extra_warnings; |
93 | ||
94 | /* If -Werror. */ | |
95 | ||
96 | extern bool warnings_are_errors; | |
f7a29665 | 97 | |
078721e1 AC |
98 | /* Nonzero to warn about unused variables, functions et.al. Use |
99 | set_Wunused() to update the -Wunused-* flags that correspond to the | |
eebedaa5 | 100 | -Wunused option. */ |
f7a29665 | 101 | |
6cf9ac28 | 102 | extern void set_Wunused (int setting); |
078721e1 | 103 | |
e01cc6dc NB |
104 | extern bool warn_unused_function; |
105 | extern bool warn_unused_label; | |
106 | extern bool warn_unused_parameter; | |
107 | extern bool warn_unused_variable; | |
108 | extern bool warn_unused_value; | |
f7a29665 | 109 | |
312f6255 GK |
110 | /* Nonzero to warn about code which is never reached. */ |
111 | ||
e01cc6dc | 112 | extern bool warn_notreached; |
312f6255 | 113 | |
67729b99 BK |
114 | /* Nonzero means warn if inline function is too large. */ |
115 | ||
e01cc6dc | 116 | extern bool warn_inline; |
67729b99 | 117 | |
f7a29665 RS |
118 | /* Nonzero to warn about variables used before they are initialized. */ |
119 | ||
120 | extern int warn_uninitialized; | |
121 | ||
eebedaa5 | 122 | /* Nonzero means warn about all declarations which shadow others. */ |
f7a29665 | 123 | |
e01cc6dc | 124 | extern bool warn_shadow; |
f7a29665 | 125 | |
d6961341 AC |
126 | /* Warn if a switch on an enum, that does not have a default case, |
127 | fails to have a case for every enum value. */ | |
f7a29665 | 128 | |
e01cc6dc | 129 | extern bool warn_switch; |
f7a29665 | 130 | |
d6961341 AC |
131 | /* Warn if a switch does not have a default case. */ |
132 | ||
e01cc6dc | 133 | extern bool warn_switch_default; |
d6961341 | 134 | |
173028e5 AC |
135 | /* Warn if a switch on an enum fails to have a case for every enum |
136 | value (regardless of the presence or otherwise of a default case). */ | |
137 | ||
e01cc6dc | 138 | extern bool warn_switch_enum; |
173028e5 | 139 | |
f7a29665 RS |
140 | /* Nonzero means warn about function definitions that default the return type |
141 | or that use a null return and have a return-type other than void. */ | |
142 | ||
143 | extern int warn_return_type; | |
144 | ||
eebedaa5 | 145 | /* Warn about functions which might be candidates for attribute noreturn. */ |
b313a0fe | 146 | |
e01cc6dc | 147 | extern bool warn_missing_noreturn; |
b313a0fe | 148 | |
f7a29665 RS |
149 | /* Nonzero means warn about pointer casts that increase the required |
150 | alignment of the target type (and might therefore lead to a crash | |
151 | due to a misaligned access). */ | |
152 | ||
e01cc6dc | 153 | extern bool warn_cast_align; |
f7a29665 | 154 | |
76817b9d RK |
155 | /* Nonzero means warn about any objects definitions whose size is larger |
156 | than N bytes. Also want about function definitions whose returned | |
157 | values are larger than N bytes. The value N is in `larger_than_size'. */ | |
158 | ||
e01cc6dc | 159 | extern bool warn_larger_than; |
06ceef4e | 160 | extern HOST_WIDE_INT larger_than_size; |
f7a29665 RS |
161 | |
162 | /* Warn if a function returns an aggregate, | |
163 | since there are often incompatible calling conventions for doing this. */ | |
164 | ||
e01cc6dc | 165 | extern bool warn_aggregate_return; |
f7a29665 | 166 | |
3c12fcc2 GM |
167 | /* Warn if packed attribute on struct is unnecessary and inefficient. */ |
168 | ||
e01cc6dc | 169 | extern bool warn_packed; |
3c12fcc2 GM |
170 | |
171 | /* Warn when gcc pads a structure to an alignment boundary. */ | |
172 | ||
e01cc6dc | 173 | extern bool warn_padded; |
3c12fcc2 | 174 | |
18424ae1 BL |
175 | /* Warn when an optimization pass is disabled. */ |
176 | ||
e01cc6dc | 177 | extern bool warn_disabled_optimization; |
18424ae1 | 178 | |
e23bd218 IR |
179 | /* Nonzero means warn about uses of __attribute__((deprecated)) |
180 | declarations. */ | |
181 | ||
e01cc6dc | 182 | extern bool warn_deprecated_decl; |
e23bd218 | 183 | |
bf52f899 NS |
184 | /* Nonzero means warn about constructs which might not be strict |
185 | aliasing safe. */ | |
186 | ||
5399d643 | 187 | extern int warn_strict_aliasing; |
bf52f899 | 188 | |
f7a29665 RS |
189 | /* Nonzero if generating code to do profiling. */ |
190 | ||
191 | extern int profile_flag; | |
192 | ||
eebedaa5 | 193 | /* Nonzero if generating code to profile program flow graph arcs. */ |
a7dbb8b4 DE |
194 | |
195 | extern int profile_arc_flag; | |
196 | ||
af166e5d ZD |
197 | /* Nonzero if value profile should be measured. */ |
198 | ||
199 | extern int flag_profile_values; | |
200 | ||
eebedaa5 | 201 | /* Nonzero if generating info for gcov to calculate line test coverage. */ |
a7dbb8b4 DE |
202 | |
203 | extern int flag_test_coverage; | |
204 | ||
eebedaa5 | 205 | /* Nonzero indicates that branch taken probabilities should be calculated. */ |
a7dbb8b4 DE |
206 | |
207 | extern int flag_branch_probabilities; | |
208 | ||
b883f801 MM |
209 | /* Nonzero if basic blocks should be reordered. */ |
210 | ||
211 | extern int flag_reorder_blocks; | |
212 | ||
194734e9 JH |
213 | /* Nonzero if functions should be reordered. */ |
214 | ||
215 | extern int flag_reorder_functions; | |
216 | ||
b883f801 MM |
217 | /* Nonzero if registers should be renamed. */ |
218 | ||
219 | extern int flag_rename_registers; | |
220 | ||
f7a29665 RS |
221 | /* Nonzero for -pedantic switch: warn about anything |
222 | that standard C forbids. */ | |
223 | ||
224 | extern int pedantic; | |
225 | ||
226 | /* Temporarily suppress certain warnings. | |
227 | This is set while reading code from a system header file. */ | |
228 | ||
229 | extern int in_system_header; | |
230 | ||
231 | /* Nonzero for -dp: annotate the assembly with a comment describing the | |
232 | pattern and alternative used. */ | |
233 | ||
234 | extern int flag_print_asm_name; | |
235 | \f | |
236 | /* Now the symbols that are set with `-f' switches. */ | |
237 | ||
238 | /* Nonzero means `char' should be signed. */ | |
239 | ||
240 | extern int flag_signed_char; | |
241 | ||
242 | /* Nonzero means give an enum type only as many bytes as it needs. */ | |
243 | ||
244 | extern int flag_short_enums; | |
245 | ||
246 | /* Nonzero for -fcaller-saves: allocate values in regs that need to | |
247 | be saved across function calls, if that produces overall better code. | |
248 | Optional now, so people can test it. */ | |
249 | ||
250 | extern int flag_caller_saves; | |
251 | ||
252 | /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ | |
253 | ||
254 | extern int flag_pcc_struct_return; | |
255 | ||
256 | /* Nonzero for -fforce-mem: load memory value into a register | |
257 | before arithmetic on it. This makes better cse but slower compilation. */ | |
258 | ||
259 | extern int flag_force_mem; | |
260 | ||
261 | /* Nonzero for -fforce-addr: load memory address into a register before | |
262 | reference to memory. This makes better cse but slower compilation. */ | |
263 | ||
264 | extern int flag_force_addr; | |
265 | ||
266 | /* Nonzero for -fdefer-pop: don't pop args after each function call; | |
267 | instead save them up to pop many calls' args with one insns. */ | |
268 | ||
269 | extern int flag_defer_pop; | |
270 | ||
271 | /* Nonzero for -ffloat-store: don't allocate floats and doubles | |
272 | in extended-precision registers. */ | |
273 | ||
274 | extern int flag_float_store; | |
275 | ||
276 | /* Nonzero enables strength-reduction in loop.c. */ | |
277 | ||
278 | extern int flag_strength_reduce; | |
279 | ||
280 | /* Nonzero enables loop unrolling in unroll.c. Only loops for which the | |
281 | number of iterations can be calculated at compile-time (UNROLL_COMPLETELY, | |
282 | UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are | |
283 | unrolled. */ | |
284 | ||
b17d5d7c | 285 | extern int flag_old_unroll_loops; |
f7a29665 RS |
286 | |
287 | /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled. | |
288 | This is generally not a win. */ | |
289 | ||
b17d5d7c | 290 | extern int flag_old_unroll_all_loops; |
f7a29665 | 291 | |
e5eb27e5 | 292 | /* Nonzero forces all invariant computations in loops to be moved |
eebedaa5 | 293 | outside the loop. */ |
e5eb27e5 JL |
294 | |
295 | extern int flag_move_all_movables; | |
296 | ||
0dd0e980 JH |
297 | /* Nonzero enables prefetch optimizations for arrays in loops. */ |
298 | ||
299 | extern int flag_prefetch_loop_arrays; | |
300 | ||
e5eb27e5 | 301 | /* Nonzero forces all general induction variables in loops to be |
eebedaa5 | 302 | strength reduced. */ |
e5eb27e5 JL |
303 | |
304 | extern int flag_reduce_all_givs; | |
305 | ||
f7a29665 RS |
306 | /* Nonzero for -fcse-follow-jumps: |
307 | have cse follow jumps to do a more extensive job. */ | |
308 | ||
309 | extern int flag_cse_follow_jumps; | |
310 | ||
8b3686ed RK |
311 | /* Nonzero for -fcse-skip-blocks: |
312 | have cse follow a branch around a block. */ | |
313 | ||
314 | extern int flag_cse_skip_blocks; | |
315 | ||
f7a29665 RS |
316 | /* Nonzero for -fexpensive-optimizations: |
317 | perform miscellaneous relatively-expensive optimizations. */ | |
318 | extern int flag_expensive_optimizations; | |
319 | ||
f7a29665 RS |
320 | /* Nonzero means don't put addresses of constant functions in registers. |
321 | Used for compiling the Unix kernel, where strange substitutions are | |
322 | done on the assembly output. */ | |
323 | ||
324 | extern int flag_no_function_cse; | |
325 | ||
326 | /* Nonzero for -fomit-frame-pointer: | |
327 | don't make a frame pointer in simple functions that don't require one. */ | |
328 | ||
329 | extern int flag_omit_frame_pointer; | |
330 | ||
331 | /* Nonzero to inhibit use of define_optimization peephole opts. */ | |
332 | ||
333 | extern int flag_no_peephole; | |
334 | ||
db8cb48e JH |
335 | /* Nonzero allows GCC to optimize sibling and tail recursive calls. */ |
336 | ||
337 | extern int flag_optimize_sibling_calls; | |
338 | ||
41af162c | 339 | /* Nonzero means the front end generally wants `errno' maintained by math |
de6c5979 | 340 | operations, like built-in SQRT. */ |
41af162c CB |
341 | |
342 | extern int flag_errno_math; | |
343 | ||
de6c5979 BL |
344 | /* Nonzero means that unsafe floating-point math optimizations are allowed |
345 | for the sake of speed. IEEE compliance is not guaranteed, and operations | |
346 | are allowed to assume that their arguments and results are "normal" | |
347 | (e.g., nonnegative for SQRT). */ | |
348 | ||
349 | extern int flag_unsafe_math_optimizations; | |
350 | ||
2e8f2e8f TM |
351 | /* Nonzero means that no NaNs or +-Infs are expected. */ |
352 | ||
353 | extern int flag_finite_math_only; | |
354 | ||
de6c5979 BL |
355 | /* Zero means that floating-point math operations cannot generate a |
356 | (user-visible) trap. This is the case, for example, in nonstop | |
357 | IEEE 754 arithmetic. */ | |
358 | ||
359 | extern int flag_trapping_math; | |
360 | ||
039c3d42 RS |
361 | /* Nonzero means disable transformations that assume default floating |
362 | point rounding behavior. */ | |
363 | ||
364 | extern int flag_rounding_math; | |
365 | ||
c64f913e CB |
366 | /* 0 means straightforward implementation of complex divide acceptable. |
367 | 1 means wide ranges of inputs must work for complex divide. | |
526aba28 | 368 | 2 means C99-like requirements for complex divide (not yet implemented). */ |
c64f913e CB |
369 | |
370 | extern int flag_complex_divide_method; | |
371 | ||
64fde701 JW |
372 | /* Nonzero means to run loop optimizations twice. */ |
373 | ||
374 | extern int flag_rerun_loop_opt; | |
375 | ||
f7a29665 RS |
376 | /* Nonzero means make functions that look like good inline candidates |
377 | go inline. */ | |
378 | ||
379 | extern int flag_inline_functions; | |
380 | ||
381 | /* Nonzero for -fkeep-inline-functions: even if we make a function | |
8008b228 | 382 | go inline everywhere, keep its definition around for debugging |
f7a29665 RS |
383 | purposes. */ |
384 | ||
385 | extern int flag_keep_inline_functions; | |
386 | ||
387 | /* Nonzero means that functions declared `inline' will be treated | |
388 | as `static'. Prevents generation of zillions of copies of unused | |
389 | static inline functions; instead, `inlines' are written out | |
390 | only when actually used. Used in conjunction with -g. Also | |
391 | does the right thing with #pragma interface. */ | |
392 | ||
393 | extern int flag_no_inline; | |
394 | ||
2cb921f4 AH |
395 | /* Nonzero means that we don't want inlining by virtue of -fno-inline, |
396 | not just because the tree inliner turned us off. */ | |
397 | ||
398 | extern int flag_really_no_inline; | |
399 | ||
f7a29665 RS |
400 | /* Nonzero if we are only using compiler to check syntax errors. */ |
401 | ||
402 | extern int flag_syntax_only; | |
f6db1481 | 403 | extern int rtl_dump_and_exit; |
f7a29665 | 404 | |
d45cf215 | 405 | /* Nonzero means we should save auxiliary info into a .X file. */ |
f7a29665 RS |
406 | |
407 | extern int flag_gen_aux_info; | |
408 | ||
409 | /* Nonzero means make the text shared if supported. */ | |
410 | ||
411 | extern int flag_shared_data; | |
412 | ||
413 | /* flag_schedule_insns means schedule insns within basic blocks (before | |
414 | local_alloc). | |
415 | flag_schedule_insns_after_reload means schedule insns after | |
416 | global_alloc. */ | |
417 | ||
418 | extern int flag_schedule_insns; | |
419 | extern int flag_schedule_insns_after_reload; | |
b9422b69 JH |
420 | extern int flag_sched2_use_superblocks; |
421 | extern int flag_sched2_use_traces; | |
f7a29665 | 422 | |
8c660648 JL |
423 | /* The following flags have effect only for scheduling before register |
424 | allocation: | |
425 | ||
e03b7153 | 426 | flag_schedule_interblock means schedule insns across basic blocks. |
8c660648 JL |
427 | flag_schedule_speculative means allow speculative motion of non-load insns. |
428 | flag_schedule_speculative_load means allow speculative motion of some | |
429 | load insns. | |
430 | flag_schedule_speculative_load_dangerous allows speculative motion of more | |
8e7336f8 | 431 | load insns. */ |
8c660648 JL |
432 | |
433 | extern int flag_schedule_interblock; | |
434 | extern int flag_schedule_speculative; | |
435 | extern int flag_schedule_speculative_load; | |
436 | extern int flag_schedule_speculative_load_dangerous; | |
8c660648 | 437 | |
569fa502 DN |
438 | /* The following flags have an effect during scheduling after register |
439 | allocation: | |
440 | ||
441 | sched_stalled_insns means that insns can be moved prematurely from the queue | |
442 | of stalled insns into the ready list. | |
443 | ||
444 | sched_stalled_insns_dep controls how many recently scheduled cycles will | |
445 | be examined for a dependency on a stalled insn that is candidate for | |
446 | premature removal from the queue of stalled insns into the ready list (has | |
447 | an effect only if the flag 'sched_stalled_insns' is set). */ | |
448 | ||
449 | extern int flag_sched_stalled_insns; | |
450 | extern int flag_sched_stalled_insns_dep; | |
451 | ||
5527bf14 | 452 | /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple |
eebedaa5 | 453 | by a cheaper branch, on a count register. */ |
8c660648 | 454 | extern int flag_branch_on_count_reg; |
8c660648 | 455 | |
46d3a873 CC |
456 | /* This option is set to 1 on -fsingle-precision-constant option which is |
457 | used to convert the floating point constants to single precision | |
eebedaa5 | 458 | constants. */ |
46d3a873 CC |
459 | |
460 | extern int flag_single_precision_constant; | |
8c660648 | 461 | |
eebedaa5 | 462 | /* Nonzero means put things in delayed-branch slots if supported. */ |
f7a29665 RS |
463 | |
464 | extern int flag_delayed_branch; | |
465 | ||
b707b450 R |
466 | /* Nonzero means suppress output of instruction numbers and line number |
467 | notes in debugging dumps. */ | |
468 | ||
469 | extern int flag_dump_unnumbered; | |
470 | ||
f7a29665 RS |
471 | /* Nonzero means change certain warnings into errors. |
472 | Usually these are warnings about failure to conform to some standard. */ | |
473 | ||
474 | extern int flag_pedantic_errors; | |
475 | ||
3d78f2e9 RH |
476 | /* Nonzero means generate position-independent code. 1 vs 2 for a |
477 | target-dependent "small" or "large" mode. */ | |
f7a29665 RS |
478 | |
479 | extern int flag_pic; | |
480 | ||
24a4dd31 JJ |
481 | /* Nonzero if we are compiling position independent code for executable. |
482 | 1 vs 2 for a target-dependent "small" or "large" mode. */ | |
483 | ||
484 | extern int flag_pie; | |
485 | ||
486 | /* Nonzero if we are compiling code for a shared library, zero for | |
487 | executable. */ | |
488 | ||
489 | extern int flag_shlib; | |
490 | ||
0f41302f MS |
491 | /* Nonzero means generate extra code for exception handling and enable |
492 | exception handling. */ | |
493 | ||
494 | extern int flag_exceptions; | |
495 | ||
f9da5064 | 496 | /* Nonzero means generate frame unwind info table when supported. */ |
14a774a9 RK |
497 | |
498 | extern int flag_unwind_tables; | |
499 | ||
f9da5064 | 500 | /* Nonzero means generate frame unwind info table exact at each insn boundary. */ |
b932f770 JH |
501 | |
502 | extern int flag_asynchronous_unwind_tables; | |
503 | ||
2786cbad JM |
504 | /* Nonzero means don't place uninitialized global data in common storage |
505 | by default. */ | |
f7a29665 RS |
506 | |
507 | extern int flag_no_common; | |
508 | ||
509 | /* -finhibit-size-directive inhibits output of .size for ELF. | |
510 | This is used only for compiling crtstuff.c, | |
511 | and it may be extended to other effects | |
512 | needed for crtstuff.c on other systems. */ | |
513 | extern int flag_inhibit_size_directive; | |
514 | ||
cf440348 JL |
515 | /* Nonzero means place each function into its own section on those platforms |
516 | which support arbitrary section names and unlimited numbers of sections. */ | |
517 | ||
518 | extern int flag_function_sections; | |
519 | ||
7d0756fb CM |
520 | /* ... and similar for data. */ |
521 | ||
522 | extern int flag_data_sections; | |
523 | ||
9a631e8e RS |
524 | /* -fverbose-asm causes extra commentary information to be produced in |
525 | the generated assembly code (to make it more readable). This option | |
526 | is generally only of use to those who actually need to read the | |
32b592fb | 527 | generated assembly code (perhaps while debugging the compiler itself). |
c85f7c16 | 528 | -fno-verbose-asm, the default, causes the extra information |
32b592fb | 529 | to not be added and is useful when comparing two assembler files. */ |
9a631e8e RS |
530 | |
531 | extern int flag_verbose_asm; | |
532 | ||
32b592fb DE |
533 | /* -dA causes debug information to be produced in |
534 | the generated assembly code (to make it more readable). This option | |
535 | is generally only of use to those who actually need to read the | |
536 | generated assembly code (perhaps while debugging the compiler itself). | |
537 | Currently, this switch is only used by dwarfout.c; however, it is intended | |
538 | to be a catchall for printing debug information in the assembler file. */ | |
539 | ||
540 | extern int flag_debug_asm; | |
541 | ||
c349e40b SC |
542 | extern int flag_dump_rtl_in_asm; |
543 | ||
d8a25128 HPN |
544 | /* Greater than zero if user symbols are prepended by a leading underscore |
545 | in generated assembly code. */ | |
546 | extern int flag_leading_underscore; | |
547 | ||
566cdc73 MM |
548 | /* Tag all structures with __attribute__(packed) */ |
549 | extern int flag_pack_struct; | |
bf1c5332 | 550 | |
9ae8ffe7 JL |
551 | /* This flag is only tested if alias checking is enabled. |
552 | 0 if pointer arguments may alias each other. True in C. | |
553 | 1 if pointer arguments may not alias each other but may alias | |
554 | global variables. | |
555 | 2 if pointer arguments may not alias each other and may not | |
556 | alias global variables. True in Fortran. | |
557 | The value is ignored if flag_alias_check is 0. */ | |
558 | extern int flag_argument_noalias; | |
559 | ||
41472af8 MM |
560 | /* Nonzero if we should do (language-dependent) alias analysis. |
561 | Typically, this analysis will assume that expressions of certain | |
562 | types do not alias expressions of certain other types. Only used | |
563 | if alias analysis (in general) is enabled. */ | |
564 | extern int flag_strict_aliasing; | |
565 | ||
a157febd GK |
566 | /* Emit code to probe the stack, to help detect stack overflow; also |
567 | may cause large objects to be allocated dynamically. */ | |
bf1c5332 | 568 | extern int flag_stack_check; |
1230327b R |
569 | |
570 | /* Do the full regmove optimization pass. */ | |
571 | extern int flag_regmove; | |
07417085 KR |
572 | |
573 | /* Instrument functions with calls at entry and exit, for profiling. */ | |
574 | extern int flag_instrument_function_entry_exit; | |
ede7cd44 | 575 | |
eebedaa5 | 576 | /* Perform a peephole pass before sched2. */ |
ede7cd44 | 577 | extern int flag_peephole2; |
a8aa7975 | 578 | |
fbe5a4a6 | 579 | /* Try to guess branch probabilities. */ |
3ff51205 AH |
580 | extern int flag_guess_branch_prob; |
581 | ||
a8aa7975 | 582 | /* -fcheck-bounds causes gcc to generate array bounds checks. |
e03b7153 | 583 | For C, C++ and ObjC: defaults off. |
a8aa7975 | 584 | For Java: defaults to on. |
e03b7153 | 585 | For Fortran: defaults to off. */ |
a8aa7975 | 586 | extern int flag_bounds_check; |
673b5311 | 587 | |
201556f0 JJ |
588 | /* This will attempt to merge constant section constants, if 1 only |
589 | string constants and constants from constant pool, if 2 also constant | |
590 | variables. */ | |
591 | extern int flag_merge_constants; | |
592 | ||
673b5311 MM |
593 | /* If one, renumber instruction UIDs to reduce the number of |
594 | unused UIDs if there are a lot of instructions. If greater than | |
595 | one, unconditionally renumber instruction UIDs. */ | |
596 | extern int flag_renumber_insns; | |
f7a29665 RS |
597 | \f |
598 | /* Other basic status info about current function. */ | |
599 | ||
600 | /* Nonzero means current function must be given a frame pointer. | |
601 | Set in stmt.c if anything is allocated on the stack there. | |
602 | Set in reload1.c if anything is allocated on the stack there. */ | |
603 | ||
604 | extern int frame_pointer_needed; | |
605 | ||
91ce572a CC |
606 | /* Nonzero if the generated code should trap on signed overflow |
607 | for PLUS / SUB / MULT. */ | |
608 | extern int flag_trapv; | |
609 | ||
4fa26a60 RS |
610 | /* Nonzero if the signed arithmetic overflow should wrap around. */ |
611 | extern int flag_wrapv; | |
612 | ||
c67e6e14 RS |
613 | /* Nonzero if subexpressions must be evaluated from left-to-right. */ |
614 | extern int flag_evaluation_order; | |
615 | ||
bb8ebb7f | 616 | /* Value of the -G xx switch, and whether it was passed or not. */ |
307b599c | 617 | extern unsigned HOST_WIDE_INT g_switch_value; |
d185d268 | 618 | extern bool g_switch_set; |
735a0e33 | 619 | |
efa3896a GK |
620 | /* Values of the -falign-* flags: how much to align labels in code. |
621 | 0 means `use default', 1 means `don't align'. | |
622 | For each variable, there is an _log variant which is the power | |
623 | of two not less than the variable, for .align output. */ | |
624 | ||
625 | extern int align_loops; | |
626 | extern int align_loops_log; | |
2cca7283 | 627 | extern int align_loops_max_skip; |
efa3896a GK |
628 | extern int align_jumps; |
629 | extern int align_jumps_log; | |
2cca7283 | 630 | extern int align_jumps_max_skip; |
efa3896a GK |
631 | extern int align_labels; |
632 | extern int align_labels_log; | |
2cca7283 | 633 | extern int align_labels_max_skip; |
efa3896a GK |
634 | extern int align_functions; |
635 | extern int align_functions_log; | |
636 | ||
f963b5d9 RS |
637 | /* Like align_functions_log above, but used by front-ends to force the |
638 | minimum function alignment. Zero means no alignment is forced. */ | |
639 | extern int force_align_functions_log; | |
640 | ||
735a0e33 UD |
641 | /* Nonzero if we dump in VCG format, not plain text. */ |
642 | extern int dump_for_graph; | |
643 | ||
644 | /* Selection of the graph form. */ | |
645 | enum graph_dump_types | |
646 | { | |
647 | no_graph = 0, | |
648 | vcg | |
649 | }; | |
650 | extern enum graph_dump_types graph_dump_format; | |
be163a70 ZW |
651 | |
652 | /* Nonzero means ignore `#ident' directives. 0 means handle them. | |
653 | On SVR4 targets, it also controls whether or not to emit a | |
654 | string identifying the compiler. */ | |
655 | ||
656 | extern int flag_no_ident; | |
881c6935 | 657 | |
34ee7f82 RS |
658 | /* Nonzero means perform global CSE. */ |
659 | ||
660 | extern int flag_gcse; | |
661 | ||
a13d4ebf AM |
662 | /* Nonzero if we want to perform enhanced load motion during gcse. */ |
663 | ||
664 | extern int flag_gcse_lm; | |
665 | ||
666 | /* Nonzero if we want to perform store motion after gcse. */ | |
667 | ||
668 | extern int flag_gcse_sm; | |
669 | ||
f5f2e3cd MH |
670 | /* Nonzero if we want to perform redundant load-after-store elimination |
671 | in gcse. */ | |
672 | ||
673 | extern int flag_gcse_las; | |
674 | ||
f9957958 MH |
675 | /* Nonzero if we want to perform global redundancy elimination after |
676 | register allocation. */ | |
677 | ||
678 | extern int flag_gcse_after_reload; | |
679 | ||
fca9dc00 ZD |
680 | /* Nonzero if value histograms should be used to optimize code. */ |
681 | extern int flag_value_profile_transformations; | |
682 | ||
fe3ad572 SC |
683 | /* Perform branch target register optimization before prologue / epilogue |
684 | threading. */ | |
685 | ||
686 | extern int flag_branch_target_load_optimize; | |
687 | ||
688 | /* Perform branch target register optimization after prologue / epilogue | |
689 | threading and jump2. */ | |
690 | ||
691 | extern int flag_branch_target_load_optimize2; | |
692 | ||
1194fc79 R |
693 | /* For the bt-load pass, nonzero means don't re-use branch target registers |
694 | in any basic block. */ | |
695 | extern int flag_btr_bb_exclusive; | |
696 | ||
a13d4ebf | 697 | |
881c6935 JM |
698 | /* Nonzero means we should do dwarf2 duplicate elimination. */ |
699 | ||
700 | extern int flag_eliminate_dwarf2_dups; | |
0e5921e8 | 701 | |
73c68f61 SS |
702 | /* Nonzero means we should do unused type elimination. */ |
703 | ||
704 | extern int flag_eliminate_unused_debug_types; | |
705 | ||
cc2902df | 706 | /* Nonzero means to collect statistics which might be expensive |
0e5921e8 ZW |
707 | and to print them when we are done. */ |
708 | extern int flag_detailed_statistics; | |
709 | ||
894d0e39 RH |
710 | /* Nonzero means enable synchronous exceptions for non-call instructions. */ |
711 | extern int flag_non_call_exceptions; | |
712 | ||
27b41650 KG |
713 | /* Nonzero means put zero initialized data in the bss section. */ |
714 | extern int flag_zero_initialized_in_bss; | |
715 | ||
52bfebf0 RS |
716 | /* Nonzero means disable transformations observable by signaling NaNs. */ |
717 | extern int flag_signaling_nans; | |
718 | ||
e72fcfe8 JH |
719 | extern int flag_unit_at_a_time; |
720 | ||
62551c66 JH |
721 | extern int flag_web; |
722 | ||
d4d1ebc1 JH |
723 | /* Nonzero means that we defer emitting functions until they are actually |
724 | used. */ | |
725 | extern int flag_remove_unreachable_functions; | |
726 | ||
014a1138 JZ |
727 | /* Nonzero if we should track variables. */ |
728 | extern int flag_var_tracking; | |
729 | ||
a37db56b GK |
730 | /* A string that's used when a random name is required. NULL means |
731 | to make it really random. */ | |
732 | ||
733 | extern const char *flag_random_seed; | |
734 | ||
57782ad8 MM |
735 | /* The version of the C++ ABI in use. The following values are |
736 | allowed: | |
737 | ||
738 | 0: The version of the ABI believed most conformant with the | |
739 | C++ ABI specification. This ABI may change as bugs are | |
740 | discovered and fixed. Therefore, 0 will not necessarily | |
741 | indicate the same ABI in different versions of G++. | |
742 | ||
743 | 1: The version of the ABI first used in G++ 3.2. | |
744 | ||
745 | Additional positive integers will be assigned as new versions of | |
746 | the ABI become the default version of the ABI. */ | |
747 | ||
748 | extern int flag_abi_version; | |
749 | ||
750 | /* Returns TRUE if generated code should match ABI version N or | |
751 | greater is in use. */ | |
752 | ||
753 | #define abi_version_at_least(N) \ | |
754 | (flag_abi_version == 0 || flag_abi_version >= (N)) | |
755 | ||
71925bc0 RS |
756 | /* True if the given mode has a NaN representation and the treatment of |
757 | NaN operands is important. Certain optimizations, such as folding | |
758 | x * 0 into x, are not correct for NaN operands, and are normally | |
759 | disabled for modes with NaNs. The user can ask for them to be | |
760 | done anyway using the -funsafe-math-optimizations switch. */ | |
761 | #define HONOR_NANS(MODE) \ | |
2e8f2e8f | 762 | (MODE_HAS_NANS (MODE) && !flag_finite_math_only) |
71925bc0 | 763 | |
52bfebf0 RS |
764 | /* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ |
765 | #define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE)) | |
766 | ||
71925bc0 RS |
767 | /* As for HONOR_NANS, but true if the mode can represent infinity and |
768 | the treatment of infinite values is important. */ | |
769 | #define HONOR_INFINITIES(MODE) \ | |
2e8f2e8f | 770 | (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only) |
71925bc0 RS |
771 | |
772 | /* Like HONOR_NANS, but true if the given mode distinguishes between | |
fbe5a4a6 | 773 | positive and negative zero, and the sign of zero is important. */ |
71925bc0 RS |
774 | #define HONOR_SIGNED_ZEROS(MODE) \ |
775 | (MODE_HAS_SIGNED_ZEROS (MODE) && !flag_unsafe_math_optimizations) | |
776 | ||
777 | /* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, | |
778 | and the rounding mode is important. */ | |
779 | #define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
039c3d42 | 780 | (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) |
71925bc0 | 781 | |
88657302 | 782 | #endif /* ! GCC_FLAGS_H */ |