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f12b58b3 | 1 | /* Compilation switch flag definitions for GCC. |
b278476e | 2 | Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
3 | Free Software Foundation, Inc. | |
addd8f36 | 4 | |
f12b58b3 | 5 | This file is part of GCC. |
addd8f36 | 6 | |
f12b58b3 | 7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
addd8f36 | 11 | |
f12b58b3 | 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
addd8f36 | 16 | |
17 | You should have received a copy of the GNU General Public License | |
f12b58b3 | 18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
addd8f36 | 21 | |
518796ad | 22 | #ifndef GCC_FLAGS_H |
23 | #define GCC_FLAGS_H | |
24 | ||
addd8f36 | 25 | /* Name of the input .c file being compiled. */ |
e772a198 | 26 | extern const char *main_input_filename; |
addd8f36 | 27 | |
28 | enum debug_info_type | |
29 | { | |
30 | NO_DEBUG, /* Write no debug info. */ | |
31 | DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */ | |
32 | SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */ | |
f9e15121 | 33 | DWARF_DEBUG, /* Write Dwarf debug info (using dwarfout.c). */ |
be6eb971 | 34 | DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */ |
f9e15121 | 35 | XCOFF_DEBUG /* Write IBM/Xcoff debug info (using dbxout.c). */ |
addd8f36 | 36 | }; |
37 | ||
38 | /* Specify which kind of debugging info to generate. */ | |
39 | extern enum debug_info_type write_symbols; | |
40 | ||
41 | enum debug_info_level | |
42 | { | |
43 | DINFO_LEVEL_NONE, /* Write no debugging info. */ | |
44 | DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */ | |
a7dce381 | 45 | DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */ |
addd8f36 | 46 | DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */ |
47 | }; | |
48 | ||
49 | /* Specify how much debugging info to generate. */ | |
50 | extern enum debug_info_level debug_info_level; | |
51 | ||
51d7935f | 52 | /* Nonzero means use GNU-only extensions in the generated symbolic |
53 | debugging information. */ | |
54 | extern int use_gnu_debug_info_extensions; | |
addd8f36 | 55 | |
56 | /* Nonzero means do optimizations. -opt. */ | |
57 | ||
58 | extern int optimize; | |
59 | ||
57361983 | 60 | /* Nonzero means optimize for size. -Os. */ |
61 | ||
62 | extern int optimize_size; | |
63 | ||
addd8f36 | 64 | /* Don't print functions as they are compiled and don't print |
65 | times taken by the various passes. -quiet. */ | |
66 | ||
67 | extern int quiet_flag; | |
68 | ||
2a8997e8 | 69 | /* Print times taken by the various passes. -ftime-report. */ |
70 | ||
71 | extern int time_report; | |
72 | ||
73 | /* Print memory still in use at end of compilation (which may have little | |
74 | to do with peak memory consumption). -fmem-report. */ | |
75 | ||
76 | extern int mem_report; | |
77 | ||
addd8f36 | 78 | /* Don't print warning messages. -w. */ |
79 | ||
80 | extern int inhibit_warnings; | |
81 | ||
02c09dab | 82 | /* Don't suppress warnings from system headers. -Wsystem-headers. */ |
83 | ||
84 | extern int warn_system_headers; | |
85 | ||
addd8f36 | 86 | /* Do print extra warnings (such as for uninitialized variables). -W. */ |
87 | ||
88 | extern int extra_warnings; | |
89 | ||
6dfd0eba | 90 | /* Nonzero to warn about unused variables, functions et.al. Use |
91 | set_Wunused() to update the -Wunused-* flags that correspond to the | |
a7dce381 | 92 | -Wunused option. */ |
addd8f36 | 93 | |
6dfd0eba | 94 | extern void set_Wunused PARAMS ((int setting)); |
95 | ||
96 | extern int warn_unused_function; | |
97 | extern int warn_unused_label; | |
98 | extern int warn_unused_parameter; | |
99 | extern int warn_unused_variable; | |
100 | extern int warn_unused_value; | |
addd8f36 | 101 | |
71a3455a | 102 | /* Nonzero to warn about code which is never reached. */ |
103 | ||
104 | extern int warn_notreached; | |
105 | ||
8d7ceea4 | 106 | /* Nonzero means warn if inline function is too large. */ |
107 | ||
108 | extern int warn_inline; | |
109 | ||
addd8f36 | 110 | /* Nonzero to warn about variables used before they are initialized. */ |
111 | ||
112 | extern int warn_uninitialized; | |
113 | ||
73f0c687 | 114 | /* Zero if unknown pragmas are ignored |
115 | One if the compiler should warn about an unknown pragma not in | |
116 | a system include file. | |
117 | Greater than one if the compiler should warn for all unknown | |
118 | pragmas. */ | |
119 | ||
120 | extern int warn_unknown_pragmas; | |
121 | ||
a7dce381 | 122 | /* Nonzero means warn about all declarations which shadow others. */ |
addd8f36 | 123 | |
124 | extern int warn_shadow; | |
125 | ||
126 | /* Warn if a switch on an enum fails to have a case for every enum value. */ | |
127 | ||
128 | extern int warn_switch; | |
129 | ||
130 | /* Nonzero means warn about function definitions that default the return type | |
131 | or that use a null return and have a return-type other than void. */ | |
132 | ||
133 | extern int warn_return_type; | |
134 | ||
a7dce381 | 135 | /* Warn about functions which might be candidates for attribute noreturn. */ |
fbc1c83e | 136 | |
137 | extern int warn_missing_noreturn; | |
138 | ||
addd8f36 | 139 | /* Nonzero means warn about pointer casts that increase the required |
140 | alignment of the target type (and might therefore lead to a crash | |
141 | due to a misaligned access). */ | |
142 | ||
143 | extern int warn_cast_align; | |
144 | ||
75db8365 | 145 | /* Nonzero means warn about any objects definitions whose size is larger |
146 | than N bytes. Also want about function definitions whose returned | |
147 | values are larger than N bytes. The value N is in `larger_than_size'. */ | |
148 | ||
149 | extern int warn_larger_than; | |
b278476e | 150 | extern HOST_WIDE_INT larger_than_size; |
addd8f36 | 151 | |
152 | /* Warn if a function returns an aggregate, | |
153 | since there are often incompatible calling conventions for doing this. */ | |
154 | ||
155 | extern int warn_aggregate_return; | |
156 | ||
fca12917 | 157 | /* Warn if packed attribute on struct is unnecessary and inefficient. */ |
158 | ||
159 | extern int warn_packed; | |
160 | ||
161 | /* Warn when gcc pads a structure to an alignment boundary. */ | |
162 | ||
163 | extern int warn_padded; | |
164 | ||
3ad51423 | 165 | /* Warn when an optimization pass is disabled. */ |
166 | ||
167 | extern int warn_disabled_optimization; | |
168 | ||
addd8f36 | 169 | /* Nonzero if generating code to do profiling. */ |
170 | ||
171 | extern int profile_flag; | |
172 | ||
173 | /* Nonzero if generating code to do profiling on the basis of basic blocks. */ | |
174 | ||
175 | extern int profile_block_flag; | |
176 | ||
a7dce381 | 177 | /* Nonzero if generating code to profile program flow graph arcs. */ |
1f902f41 | 178 | |
179 | extern int profile_arc_flag; | |
180 | ||
a7dce381 | 181 | /* Nonzero if generating info for gcov to calculate line test coverage. */ |
1f902f41 | 182 | |
183 | extern int flag_test_coverage; | |
184 | ||
a7dce381 | 185 | /* Nonzero indicates that branch taken probabilities should be calculated. */ |
1f902f41 | 186 | |
187 | extern int flag_branch_probabilities; | |
188 | ||
7565f115 | 189 | /* Nonzero if basic blocks should be reordered. */ |
190 | ||
191 | extern int flag_reorder_blocks; | |
192 | ||
193 | /* Nonzero if registers should be renamed. */ | |
194 | ||
195 | extern int flag_rename_registers; | |
196 | ||
addd8f36 | 197 | /* Nonzero for -pedantic switch: warn about anything |
198 | that standard C forbids. */ | |
199 | ||
200 | extern int pedantic; | |
201 | ||
202 | /* Temporarily suppress certain warnings. | |
203 | This is set while reading code from a system header file. */ | |
204 | ||
205 | extern int in_system_header; | |
206 | ||
207 | /* Nonzero for -dp: annotate the assembly with a comment describing the | |
208 | pattern and alternative used. */ | |
209 | ||
210 | extern int flag_print_asm_name; | |
211 | \f | |
212 | /* Now the symbols that are set with `-f' switches. */ | |
213 | ||
214 | /* Nonzero means `char' should be signed. */ | |
215 | ||
216 | extern int flag_signed_char; | |
217 | ||
218 | /* Nonzero means give an enum type only as many bytes as it needs. */ | |
219 | ||
220 | extern int flag_short_enums; | |
221 | ||
222 | /* Nonzero for -fcaller-saves: allocate values in regs that need to | |
223 | be saved across function calls, if that produces overall better code. | |
224 | Optional now, so people can test it. */ | |
225 | ||
226 | extern int flag_caller_saves; | |
227 | ||
228 | /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ | |
229 | ||
230 | extern int flag_pcc_struct_return; | |
231 | ||
232 | /* Nonzero for -fforce-mem: load memory value into a register | |
233 | before arithmetic on it. This makes better cse but slower compilation. */ | |
234 | ||
235 | extern int flag_force_mem; | |
236 | ||
237 | /* Nonzero for -fforce-addr: load memory address into a register before | |
238 | reference to memory. This makes better cse but slower compilation. */ | |
239 | ||
240 | extern int flag_force_addr; | |
241 | ||
242 | /* Nonzero for -fdefer-pop: don't pop args after each function call; | |
243 | instead save them up to pop many calls' args with one insns. */ | |
244 | ||
245 | extern int flag_defer_pop; | |
246 | ||
247 | /* Nonzero for -ffloat-store: don't allocate floats and doubles | |
248 | in extended-precision registers. */ | |
249 | ||
250 | extern int flag_float_store; | |
251 | ||
252 | /* Nonzero enables strength-reduction in loop.c. */ | |
253 | ||
254 | extern int flag_strength_reduce; | |
255 | ||
256 | /* Nonzero enables loop unrolling in unroll.c. Only loops for which the | |
257 | number of iterations can be calculated at compile-time (UNROLL_COMPLETELY, | |
258 | UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are | |
259 | unrolled. */ | |
260 | ||
261 | extern int flag_unroll_loops; | |
262 | ||
263 | /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled. | |
264 | This is generally not a win. */ | |
265 | ||
266 | extern int flag_unroll_all_loops; | |
267 | ||
a539e2e6 | 268 | /* Nonzero forces all invariant computations in loops to be moved |
a7dce381 | 269 | outside the loop. */ |
a539e2e6 | 270 | |
271 | extern int flag_move_all_movables; | |
272 | ||
273 | /* Nonzero forces all general induction variables in loops to be | |
a7dce381 | 274 | strength reduced. */ |
a539e2e6 | 275 | |
276 | extern int flag_reduce_all_givs; | |
277 | ||
addd8f36 | 278 | /* Nonzero for -fcse-follow-jumps: |
279 | have cse follow jumps to do a more extensive job. */ | |
280 | ||
281 | extern int flag_cse_follow_jumps; | |
282 | ||
ed84fed1 | 283 | /* Nonzero for -fcse-skip-blocks: |
284 | have cse follow a branch around a block. */ | |
285 | ||
286 | extern int flag_cse_skip_blocks; | |
287 | ||
addd8f36 | 288 | /* Nonzero for -fexpensive-optimizations: |
289 | perform miscellaneous relatively-expensive optimizations. */ | |
290 | extern int flag_expensive_optimizations; | |
291 | ||
292 | /* Nonzero for -fwritable-strings: | |
293 | store string constants in data segment and don't uniquize them. */ | |
294 | ||
295 | extern int flag_writable_strings; | |
296 | ||
297 | /* Nonzero means don't put addresses of constant functions in registers. | |
298 | Used for compiling the Unix kernel, where strange substitutions are | |
299 | done on the assembly output. */ | |
300 | ||
301 | extern int flag_no_function_cse; | |
302 | ||
303 | /* Nonzero for -fomit-frame-pointer: | |
304 | don't make a frame pointer in simple functions that don't require one. */ | |
305 | ||
306 | extern int flag_omit_frame_pointer; | |
307 | ||
308 | /* Nonzero to inhibit use of define_optimization peephole opts. */ | |
309 | ||
310 | extern int flag_no_peephole; | |
311 | ||
312 | /* Nonzero means all references through pointers are volatile. */ | |
313 | ||
314 | extern int flag_volatile; | |
315 | ||
be2828ce | 316 | /* Nonzero means treat all global and extern variables as volatile. */ |
0e28cae1 | 317 | |
318 | extern int flag_volatile_global; | |
319 | ||
be2828ce | 320 | /* Nonzero means treat all static variables as volatile. */ |
321 | ||
322 | extern int flag_volatile_static; | |
323 | ||
70d4a8b7 | 324 | /* Nonzero allows GCC to optimize sibling and tail recursive calls. */ |
325 | ||
326 | extern int flag_optimize_sibling_calls; | |
327 | ||
6dac5541 | 328 | /* Nonzero means the front end generally wants `errno' maintained by math |
7f3be425 | 329 | operations, like built-in SQRT. */ |
6dac5541 | 330 | |
331 | extern int flag_errno_math; | |
332 | ||
7f3be425 | 333 | /* Nonzero means that unsafe floating-point math optimizations are allowed |
334 | for the sake of speed. IEEE compliance is not guaranteed, and operations | |
335 | are allowed to assume that their arguments and results are "normal" | |
336 | (e.g., nonnegative for SQRT). */ | |
337 | ||
338 | extern int flag_unsafe_math_optimizations; | |
339 | ||
340 | /* Zero means that floating-point math operations cannot generate a | |
341 | (user-visible) trap. This is the case, for example, in nonstop | |
342 | IEEE 754 arithmetic. */ | |
343 | ||
344 | extern int flag_trapping_math; | |
345 | ||
27bc6aee | 346 | /* 0 means straightforward implementation of complex divide acceptable. |
347 | 1 means wide ranges of inputs must work for complex divide. | |
ea15b501 | 348 | 2 means C99-like requirements for complex divide (not yet implemented). */ |
27bc6aee | 349 | |
350 | extern int flag_complex_divide_method; | |
351 | ||
943e2912 | 352 | /* Nonzero means to run loop optimizations twice. */ |
353 | ||
354 | extern int flag_rerun_loop_opt; | |
355 | ||
addd8f36 | 356 | /* Nonzero means make functions that look like good inline candidates |
357 | go inline. */ | |
358 | ||
359 | extern int flag_inline_functions; | |
360 | ||
361 | /* Nonzero for -fkeep-inline-functions: even if we make a function | |
99c2edb0 | 362 | go inline everywhere, keep its definition around for debugging |
addd8f36 | 363 | purposes. */ |
364 | ||
365 | extern int flag_keep_inline_functions; | |
366 | ||
367 | /* Nonzero means that functions declared `inline' will be treated | |
368 | as `static'. Prevents generation of zillions of copies of unused | |
369 | static inline functions; instead, `inlines' are written out | |
370 | only when actually used. Used in conjunction with -g. Also | |
371 | does the right thing with #pragma interface. */ | |
372 | ||
373 | extern int flag_no_inline; | |
374 | ||
375 | /* Nonzero if we are only using compiler to check syntax errors. */ | |
376 | ||
377 | extern int flag_syntax_only; | |
378 | ||
f9e15121 | 379 | /* Nonzero means we should save auxiliary info into a .X file. */ |
addd8f36 | 380 | |
381 | extern int flag_gen_aux_info; | |
382 | ||
383 | /* Nonzero means make the text shared if supported. */ | |
384 | ||
385 | extern int flag_shared_data; | |
386 | ||
387 | /* flag_schedule_insns means schedule insns within basic blocks (before | |
388 | local_alloc). | |
389 | flag_schedule_insns_after_reload means schedule insns after | |
390 | global_alloc. */ | |
391 | ||
392 | extern int flag_schedule_insns; | |
393 | extern int flag_schedule_insns_after_reload; | |
394 | ||
3eb9a99d | 395 | /* The following flags have effect only for scheduling before register |
396 | allocation: | |
397 | ||
398 | flag_schedule_interblock means schedule insns accross basic blocks. | |
399 | flag_schedule_speculative means allow speculative motion of non-load insns. | |
400 | flag_schedule_speculative_load means allow speculative motion of some | |
401 | load insns. | |
402 | flag_schedule_speculative_load_dangerous allows speculative motion of more | |
12c2cca5 | 403 | load insns. */ |
3eb9a99d | 404 | |
405 | extern int flag_schedule_interblock; | |
406 | extern int flag_schedule_speculative; | |
407 | extern int flag_schedule_speculative_load; | |
408 | extern int flag_schedule_speculative_load_dangerous; | |
3eb9a99d | 409 | |
9641f63c | 410 | /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple |
a7dce381 | 411 | by a cheaper branch, on a count register. */ |
3eb9a99d | 412 | extern int flag_branch_on_count_reg; |
3eb9a99d | 413 | |
082ea57a | 414 | /* This option is set to 1 on -fsingle-precision-constant option which is |
415 | used to convert the floating point constants to single precision | |
a7dce381 | 416 | constants. */ |
082ea57a | 417 | |
418 | extern int flag_single_precision_constant; | |
3eb9a99d | 419 | |
a7dce381 | 420 | /* Nonzero means put things in delayed-branch slots if supported. */ |
addd8f36 | 421 | |
422 | extern int flag_delayed_branch; | |
423 | ||
fd63ca43 | 424 | /* Nonzero means suppress output of instruction numbers and line number |
425 | notes in debugging dumps. */ | |
426 | ||
427 | extern int flag_dump_unnumbered; | |
428 | ||
addd8f36 | 429 | /* Nonzero means pretend it is OK to examine bits of target floats, |
430 | even if that isn't true. The resulting code will have incorrect constants, | |
431 | but the same series of instructions that the native compiler would make. */ | |
432 | ||
433 | extern int flag_pretend_float; | |
434 | ||
435 | /* Nonzero means change certain warnings into errors. | |
436 | Usually these are warnings about failure to conform to some standard. */ | |
437 | ||
438 | extern int flag_pedantic_errors; | |
439 | ||
440 | /* Nonzero means generate position-independent code. | |
441 | This is not fully implemented yet. */ | |
442 | ||
443 | extern int flag_pic; | |
444 | ||
a92771b8 | 445 | /* Nonzero means generate extra code for exception handling and enable |
446 | exception handling. */ | |
447 | ||
448 | extern int flag_exceptions; | |
449 | ||
155b05dc | 450 | /* Nonzero means generate frame unwind info table when supported */ |
451 | ||
452 | extern int flag_unwind_tables; | |
453 | ||
9645fa4f | 454 | /* Nonzero means generate frame unwind info table exact at each insn boundary */ |
455 | ||
456 | extern int flag_asynchronous_unwind_tables; | |
457 | ||
9493f142 | 458 | /* Nonzero means don't place uninitialized global data in common storage |
459 | by default. */ | |
addd8f36 | 460 | |
461 | extern int flag_no_common; | |
462 | ||
463 | /* -finhibit-size-directive inhibits output of .size for ELF. | |
464 | This is used only for compiling crtstuff.c, | |
465 | and it may be extended to other effects | |
466 | needed for crtstuff.c on other systems. */ | |
467 | extern int flag_inhibit_size_directive; | |
468 | ||
f6e3ef26 | 469 | /* Nonzero means place each function into its own section on those platforms |
470 | which support arbitrary section names and unlimited numbers of sections. */ | |
471 | ||
472 | extern int flag_function_sections; | |
473 | ||
e70c91fb | 474 | /* ... and similar for data. */ |
475 | ||
476 | extern int flag_data_sections; | |
477 | ||
88ef61d1 | 478 | /* -fverbose-asm causes extra commentary information to be produced in |
479 | the generated assembly code (to make it more readable). This option | |
480 | is generally only of use to those who actually need to read the | |
4f96aab5 | 481 | generated assembly code (perhaps while debugging the compiler itself). |
220345e0 | 482 | -fno-verbose-asm, the default, causes the extra information |
4f96aab5 | 483 | to not be added and is useful when comparing two assembler files. */ |
88ef61d1 | 484 | |
485 | extern int flag_verbose_asm; | |
486 | ||
4f96aab5 | 487 | /* -dA causes debug information to be produced in |
488 | the generated assembly code (to make it more readable). This option | |
489 | is generally only of use to those who actually need to read the | |
490 | generated assembly code (perhaps while debugging the compiler itself). | |
491 | Currently, this switch is only used by dwarfout.c; however, it is intended | |
492 | to be a catchall for printing debug information in the assembler file. */ | |
493 | ||
494 | extern int flag_debug_asm; | |
495 | ||
af5e5fd0 | 496 | extern int flag_dump_rtl_in_asm; |
497 | ||
addd8f36 | 498 | /* -fgnu-linker specifies use of the GNU linker for initializations. |
499 | -fno-gnu-linker says that collect will be used. */ | |
500 | extern int flag_gnu_linker; | |
a6a1ab64 | 501 | |
502 | /* Tag all structures with __attribute__(packed) */ | |
503 | extern int flag_pack_struct; | |
f345c71e | 504 | |
ea0cb7ae | 505 | /* This flag is only tested if alias checking is enabled. |
506 | 0 if pointer arguments may alias each other. True in C. | |
507 | 1 if pointer arguments may not alias each other but may alias | |
508 | global variables. | |
509 | 2 if pointer arguments may not alias each other and may not | |
510 | alias global variables. True in Fortran. | |
511 | The value is ignored if flag_alias_check is 0. */ | |
512 | extern int flag_argument_noalias; | |
513 | ||
b5ba9f3a | 514 | /* Nonzero if we should do (language-dependent) alias analysis. |
515 | Typically, this analysis will assume that expressions of certain | |
516 | types do not alias expressions of certain other types. Only used | |
517 | if alias analysis (in general) is enabled. */ | |
518 | extern int flag_strict_aliasing; | |
519 | ||
8f8ac140 | 520 | /* Emit code to probe the stack, to help detect stack overflow; also |
521 | may cause large objects to be allocated dynamically. */ | |
f345c71e | 522 | extern int flag_stack_check; |
97bcb74e | 523 | |
524 | /* Do the full regmove optimization pass. */ | |
525 | extern int flag_regmove; | |
abd28cef | 526 | |
527 | /* Instrument functions with calls at entry and exit, for profiling. */ | |
528 | extern int flag_instrument_function_entry_exit; | |
82575fa7 | 529 | |
a7dce381 | 530 | /* Perform a peephole pass before sched2. */ |
82575fa7 | 531 | extern int flag_peephole2; |
5e57d7a8 | 532 | |
97d97fcc | 533 | /* Try to guess branch probablities. */ |
534 | extern int flag_guess_branch_prob; | |
535 | ||
5e57d7a8 | 536 | /* -fbounded-pointers causes gcc to compile pointers as composite |
537 | objects occupying three words: the pointer value, the base address | |
538 | of the referent object, and the address immediately beyond the end | |
539 | of the referent object. The base and extent allow us to perform | |
540 | runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */ | |
541 | extern int flag_bounded_pointers; | |
542 | ||
543 | /* -fcheck-bounds causes gcc to generate array bounds checks. | |
544 | For C, C++: defaults to value of flag_bounded_pointers. | |
545 | For ObjC: defaults to off. | |
546 | For Java: defaults to on. | |
547 | For Fortran: defaults to off. | |
548 | For CHILL: defaults to off. */ | |
549 | extern int flag_bounds_check; | |
214d02d0 | 550 | |
bb2821c0 | 551 | /* This will attempt to merge constant section constants, if 1 only |
552 | string constants and constants from constant pool, if 2 also constant | |
553 | variables. */ | |
554 | extern int flag_merge_constants; | |
555 | ||
214d02d0 | 556 | /* If one, renumber instruction UIDs to reduce the number of |
557 | unused UIDs if there are a lot of instructions. If greater than | |
558 | one, unconditionally renumber instruction UIDs. */ | |
559 | extern int flag_renumber_insns; | |
addd8f36 | 560 | \f |
561 | /* Other basic status info about current function. */ | |
562 | ||
563 | /* Nonzero means current function must be given a frame pointer. | |
564 | Set in stmt.c if anything is allocated on the stack there. | |
565 | Set in reload1.c if anything is allocated on the stack there. */ | |
566 | ||
567 | extern int frame_pointer_needed; | |
568 | ||
f0c10fcf | 569 | /* Nonzero if GCC must add code to check memory access (used by Checker). */ |
570 | ||
571 | extern int flag_check_memory_usage; | |
572 | ||
bec2d490 | 573 | /* Nonzero if the generated code should trap on signed overflow |
574 | for PLUS / SUB / MULT. */ | |
575 | extern int flag_trapv; | |
576 | ||
f0c10fcf | 577 | /* Nonzero if GCC must prefix function names (used with |
578 | flag_check_memory_usage). */ | |
579 | ||
580 | extern int flag_prefix_function_name; | |
a9fa9190 | 581 | |
582 | /* Value of the -G xx switch, and whether it was passed or not. */ | |
583 | extern int g_switch_value; | |
584 | extern int g_switch_set; | |
3eaf50a4 | 585 | |
61e95947 | 586 | /* Values of the -falign-* flags: how much to align labels in code. |
587 | 0 means `use default', 1 means `don't align'. | |
588 | For each variable, there is an _log variant which is the power | |
589 | of two not less than the variable, for .align output. */ | |
590 | ||
591 | extern int align_loops; | |
592 | extern int align_loops_log; | |
593 | extern int align_jumps; | |
594 | extern int align_jumps_log; | |
595 | extern int align_labels; | |
596 | extern int align_labels_log; | |
597 | extern int align_functions; | |
598 | extern int align_functions_log; | |
599 | ||
3eaf50a4 | 600 | /* Nonzero if we dump in VCG format, not plain text. */ |
601 | extern int dump_for_graph; | |
602 | ||
603 | /* Selection of the graph form. */ | |
604 | enum graph_dump_types | |
605 | { | |
606 | no_graph = 0, | |
607 | vcg | |
608 | }; | |
609 | extern enum graph_dump_types graph_dump_format; | |
5bbb9f06 | 610 | |
611 | /* Nonzero means ignore `#ident' directives. 0 means handle them. | |
612 | On SVR4 targets, it also controls whether or not to emit a | |
613 | string identifying the compiler. */ | |
614 | ||
615 | extern int flag_no_ident; | |
19f716e5 | 616 | |
8e802be9 | 617 | /* Nonzero if we want to perform enhanced load motion during gcse. */ |
618 | ||
619 | extern int flag_gcse_lm; | |
620 | ||
621 | /* Nonzero if we want to perform store motion after gcse. */ | |
622 | ||
623 | extern int flag_gcse_sm; | |
624 | ||
625 | ||
19f716e5 | 626 | /* Nonzero means we should do dwarf2 duplicate elimination. */ |
627 | ||
628 | extern int flag_eliminate_dwarf2_dups; | |
518796ad | 629 | |
630 | /* Non-zero means to collect statistics which might be expensive | |
631 | and to print them when we are done. */ | |
632 | extern int flag_detailed_statistics; | |
633 | ||
be5ed96c | 634 | /* Nonzero means enable synchronous exceptions for non-call instructions. */ |
635 | extern int flag_non_call_exceptions; | |
636 | ||
2a281353 | 637 | #endif /* ! GCC_FLAGS_H */ |