Mercurial > hg > CbC > CbC_gcc
comparison gcc/flags.h @ 0:a06113de4d67
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author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
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children | 77e2b8dfacca |
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1 /* Compilation switch flag definitions for GCC. | |
2 Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, | |
3 2003, 2004, 2005, 2006, 2007, 2008, 2009 | |
4 Free Software Foundation, Inc. | |
5 | |
6 This file is part of GCC. | |
7 | |
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 3, or (at your option) any later | |
11 version. | |
12 | |
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. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
19 along with GCC; see the file COPYING3. If not see | |
20 <http://www.gnu.org/licenses/>. */ | |
21 | |
22 #ifndef GCC_FLAGS_H | |
23 #define GCC_FLAGS_H | |
24 | |
25 #include "coretypes.h" | |
26 #include "options.h" | |
27 #include "real.h" | |
28 | |
29 enum debug_info_type | |
30 { | |
31 NO_DEBUG, /* Write no debug info. */ | |
32 DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */ | |
33 SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */ | |
34 DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */ | |
35 XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */ | |
36 VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */ | |
37 VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c). | |
38 and DWARF v2 debug info (using dwarf2out.c). */ | |
39 }; | |
40 | |
41 /* Specify which kind of debugging info to generate. */ | |
42 extern enum debug_info_type write_symbols; | |
43 | |
44 /* Names of debug_info_type, for error messages. */ | |
45 extern const char *const debug_type_names[]; | |
46 | |
47 enum debug_info_level | |
48 { | |
49 DINFO_LEVEL_NONE, /* Write no debugging info. */ | |
50 DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */ | |
51 DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */ | |
52 DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */ | |
53 }; | |
54 | |
55 /* Specify how much debugging info to generate. */ | |
56 extern enum debug_info_level debug_info_level; | |
57 | |
58 /* A major contribution to object and executable size is debug | |
59 information size. A major contribution to debug information | |
60 size is struct descriptions replicated in several object files. | |
61 The following function determines whether or not debug information | |
62 should be generated for a given struct. The indirect parameter | |
63 indicates that the struct is being handled indirectly, via | |
64 a pointer. See opts.c for the implementation. */ | |
65 | |
66 enum debug_info_usage | |
67 { | |
68 DINFO_USAGE_DFN, /* A struct definition. */ | |
69 DINFO_USAGE_DIR_USE, /* A direct use, such as the type of a variable. */ | |
70 DINFO_USAGE_IND_USE, /* An indirect use, such as through a pointer. */ | |
71 DINFO_USAGE_NUM_ENUMS /* The number of enumerators. */ | |
72 }; | |
73 | |
74 extern bool should_emit_struct_debug (tree type_decl, enum debug_info_usage); | |
75 extern void set_struct_debug_option (const char *value); | |
76 | |
77 /* Nonzero means use GNU-only extensions in the generated symbolic | |
78 debugging information. */ | |
79 extern bool use_gnu_debug_info_extensions; | |
80 | |
81 /* Enumerate visibility settings. This is deliberately ordered from most | |
82 to least visibility. */ | |
83 #ifndef SYMBOL_VISIBILITY_DEFINED | |
84 #define SYMBOL_VISIBILITY_DEFINED | |
85 enum symbol_visibility | |
86 { | |
87 VISIBILITY_DEFAULT, | |
88 VISIBILITY_PROTECTED, | |
89 VISIBILITY_HIDDEN, | |
90 VISIBILITY_INTERNAL | |
91 }; | |
92 #endif | |
93 | |
94 /* The default visibility for all symbols (unless overridden). */ | |
95 extern enum symbol_visibility default_visibility; | |
96 | |
97 struct visibility_flags | |
98 { | |
99 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */ | |
100 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */ | |
101 }; | |
102 | |
103 /* Global visibility options. */ | |
104 extern struct visibility_flags visibility_options; | |
105 | |
106 /* Nonzero means do optimizations. -opt. */ | |
107 | |
108 extern int optimize; | |
109 | |
110 /* Nonzero means optimize for size. -Os. */ | |
111 | |
112 extern int optimize_size; | |
113 | |
114 /* Do print extra warnings (such as for uninitialized variables). | |
115 -W/-Wextra. */ | |
116 | |
117 extern bool extra_warnings; | |
118 | |
119 /* Used to set the level of -Wstrict-aliasing, when no level is specified. | |
120 The external way to set the default level is to use | |
121 -Wstrict-aliasing=level. | |
122 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified, | |
123 and 0 otherwise. After calling this function, wstrict_aliasing will be | |
124 set to the default value of -Wstrict_aliasing=level. */ | |
125 | |
126 extern void set_Wstrict_aliasing (int onoff); | |
127 | |
128 /* Nonzero means warn about any objects definitions whose size is larger | |
129 than N bytes. Also want about function definitions whose returned | |
130 values are larger than N bytes. The value N is in `larger_than_size'. */ | |
131 | |
132 extern bool warn_larger_than; | |
133 extern HOST_WIDE_INT larger_than_size; | |
134 | |
135 /* Nonzero means warn about any function whose frame size is larger | |
136 than N bytes. */ | |
137 | |
138 extern bool warn_frame_larger_than; | |
139 extern HOST_WIDE_INT frame_larger_than_size; | |
140 | |
141 /* Nonzero for -dp: annotate the assembly with a comment describing the | |
142 pattern and alternative used. */ | |
143 | |
144 extern int flag_print_asm_name; | |
145 | |
146 /* Now the symbols that are set with `-f' switches. */ | |
147 | |
148 /* Nonzero means `char' should be signed. */ | |
149 | |
150 extern int flag_signed_char; | |
151 | |
152 /* Nonzero means give an enum type only as many bytes as it needs. A value | |
153 of 2 means it has not yet been initialized. */ | |
154 | |
155 extern int flag_short_enums; | |
156 | |
157 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ | |
158 | |
159 extern int flag_pcc_struct_return; | |
160 | |
161 /* 0 means straightforward implementation of complex divide acceptable. | |
162 1 means wide ranges of inputs must work for complex divide. | |
163 2 means C99-like requirements for complex multiply and divide. */ | |
164 | |
165 extern int flag_complex_method; | |
166 | |
167 /* Nonzero if we are only using compiler to check syntax errors. */ | |
168 | |
169 extern int rtl_dump_and_exit; | |
170 | |
171 /* Nonzero means we should save auxiliary info into a .X file. */ | |
172 | |
173 extern int flag_gen_aux_info; | |
174 | |
175 /* Nonzero means suppress output of instruction numbers and line number | |
176 notes in debugging dumps. */ | |
177 | |
178 extern int flag_dump_unnumbered; | |
179 | |
180 /* Nonzero means change certain warnings into errors. | |
181 Usually these are warnings about failure to conform to some standard. */ | |
182 | |
183 extern int flag_pedantic_errors; | |
184 | |
185 /* Nonzero means make permerror produce warnings instead of errors. */ | |
186 | |
187 extern int flag_permissive; | |
188 | |
189 /* Nonzero if we are compiling code for a shared library, zero for | |
190 executable. */ | |
191 | |
192 extern int flag_shlib; | |
193 | |
194 /* -dA causes debug information to be produced in | |
195 the generated assembly code (to make it more readable). This option | |
196 is generally only of use to those who actually need to read the | |
197 generated assembly code (perhaps while debugging the compiler itself). | |
198 Currently, this switch is only used by dwarfout.c; however, it is intended | |
199 to be a catchall for printing debug information in the assembler file. */ | |
200 | |
201 extern int flag_debug_asm; | |
202 | |
203 /* Generate code for GNU or NeXT Objective-C runtime environment. */ | |
204 | |
205 extern int flag_next_runtime; | |
206 | |
207 extern int flag_dump_rtl_in_asm; | |
208 | |
209 /* The algorithm used for the integrated register allocator (IRA). */ | |
210 enum ira_algorithm | |
211 { | |
212 IRA_ALGORITHM_CB, | |
213 IRA_ALGORITHM_PRIORITY | |
214 }; | |
215 | |
216 extern enum ira_algorithm flag_ira_algorithm; | |
217 | |
218 /* The regions used for the integrated register allocator (IRA). */ | |
219 enum ira_region | |
220 { | |
221 IRA_REGION_ONE, | |
222 IRA_REGION_ALL, | |
223 IRA_REGION_MIXED | |
224 }; | |
225 | |
226 extern enum ira_region flag_ira_region; | |
227 | |
228 extern unsigned int flag_ira_verbose; | |
229 | |
230 | |
231 /* Other basic status info about current function. */ | |
232 | |
233 /* Nonzero if subexpressions must be evaluated from left-to-right. */ | |
234 extern int flag_evaluation_order; | |
235 | |
236 /* Value of the -G xx switch, and whether it was passed or not. */ | |
237 extern unsigned HOST_WIDE_INT g_switch_value; | |
238 extern bool g_switch_set; | |
239 | |
240 /* Same for selective scheduling. */ | |
241 extern bool sel_sched_switch_set; | |
242 | |
243 /* Values of the -falign-* flags: how much to align labels in code. | |
244 0 means `use default', 1 means `don't align'. | |
245 For each variable, there is an _log variant which is the power | |
246 of two not less than the variable, for .align output. */ | |
247 | |
248 extern int align_loops_log; | |
249 extern int align_loops_max_skip; | |
250 extern int align_jumps_log; | |
251 extern int align_jumps_max_skip; | |
252 extern int align_labels_log; | |
253 extern int align_labels_max_skip; | |
254 extern int align_functions_log; | |
255 | |
256 /* Nonzero if we dump in VCG format, not plain text. */ | |
257 extern int dump_for_graph; | |
258 | |
259 /* Selection of the graph form. */ | |
260 enum graph_dump_types | |
261 { | |
262 no_graph = 0, | |
263 vcg | |
264 }; | |
265 extern enum graph_dump_types graph_dump_format; | |
266 | |
267 /* Nonzero means to collect statistics which might be expensive | |
268 and to print them when we are done. */ | |
269 extern int flag_detailed_statistics; | |
270 | |
271 /* Nonzero means that we defer emitting functions until they are actually | |
272 used. */ | |
273 extern int flag_remove_unreachable_functions; | |
274 | |
275 /* Nonzero if we should track variables. */ | |
276 extern int flag_var_tracking; | |
277 | |
278 /* True if flag_speculative_prefetching was set by user. Used to suppress | |
279 warning message in case flag was set by -fprofile-{generate,use}. */ | |
280 extern bool flag_speculative_prefetching_set; | |
281 | |
282 /* Type of stack check. */ | |
283 enum stack_check_type | |
284 { | |
285 /* Do not check the stack. */ | |
286 NO_STACK_CHECK = 0, | |
287 | |
288 /* Check the stack generically, i.e. assume no specific support | |
289 from the target configuration files. */ | |
290 GENERIC_STACK_CHECK, | |
291 | |
292 /* Check the stack and rely on the target configuration files to | |
293 check the static frame of functions, i.e. use the generic | |
294 mechanism only for dynamic stack allocations. */ | |
295 STATIC_BUILTIN_STACK_CHECK, | |
296 | |
297 /* Check the stack and entirely rely on the target configuration | |
298 files, i.e. do not use the generic mechanism at all. */ | |
299 FULL_BUILTIN_STACK_CHECK | |
300 }; | |
301 extern enum stack_check_type flag_stack_check; | |
302 | |
303 /* Returns TRUE if generated code should match ABI version N or | |
304 greater is in use. */ | |
305 | |
306 #define abi_version_at_least(N) \ | |
307 (flag_abi_version == 0 || flag_abi_version >= (N)) | |
308 | |
309 /* Return whether the function should be excluded from | |
310 instrumentation. */ | |
311 extern bool flag_instrument_functions_exclude_p (tree fndecl); | |
312 | |
313 /* True if the given mode has a NaN representation and the treatment of | |
314 NaN operands is important. Certain optimizations, such as folding | |
315 x * 0 into 0, are not correct for NaN operands, and are normally | |
316 disabled for modes with NaNs. The user can ask for them to be | |
317 done anyway using the -funsafe-math-optimizations switch. */ | |
318 #define HONOR_NANS(MODE) \ | |
319 (MODE_HAS_NANS (MODE) && !flag_finite_math_only) | |
320 | |
321 /* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ | |
322 #define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE)) | |
323 | |
324 /* As for HONOR_NANS, but true if the mode can represent infinity and | |
325 the treatment of infinite values is important. */ | |
326 #define HONOR_INFINITIES(MODE) \ | |
327 (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only) | |
328 | |
329 /* Like HONOR_NANS, but true if the given mode distinguishes between | |
330 positive and negative zero, and the sign of zero is important. */ | |
331 #define HONOR_SIGNED_ZEROS(MODE) \ | |
332 (MODE_HAS_SIGNED_ZEROS (MODE) && flag_signed_zeros) | |
333 | |
334 /* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, | |
335 and the rounding mode is important. */ | |
336 #define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
337 (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) | |
338 | |
339 /* True if overflow wraps around for the given integral type. That | |
340 is, TYPE_MAX + 1 == TYPE_MIN. */ | |
341 #define TYPE_OVERFLOW_WRAPS(TYPE) \ | |
342 (TYPE_UNSIGNED (TYPE) || flag_wrapv) | |
343 | |
344 /* True if overflow is undefined for the given integral type. We may | |
345 optimize on the assumption that values in the type never overflow. | |
346 | |
347 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED | |
348 must issue a warning based on warn_strict_overflow. In some cases | |
349 it will be appropriate to issue the warning immediately, and in | |
350 other cases it will be appropriate to simply set a flag and let the | |
351 caller decide whether a warning is appropriate or not. */ | |
352 #define TYPE_OVERFLOW_UNDEFINED(TYPE) \ | |
353 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow) | |
354 | |
355 /* True if overflow for the given integral type should issue a | |
356 trap. */ | |
357 #define TYPE_OVERFLOW_TRAPS(TYPE) \ | |
358 (!TYPE_UNSIGNED (TYPE) && flag_trapv) | |
359 | |
360 /* True if pointer types have undefined overflow. */ | |
361 #define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow) | |
362 | |
363 /* Names for the different levels of -Wstrict-overflow=N. The numeric | |
364 values here correspond to N. */ | |
365 | |
366 enum warn_strict_overflow_code | |
367 { | |
368 /* Overflow warning that should be issued with -Wall: a questionable | |
369 construct that is easy to avoid even when using macros. Example: | |
370 folding (x + CONSTANT > x) to 1. */ | |
371 WARN_STRICT_OVERFLOW_ALL = 1, | |
372 /* Overflow warning about folding a comparison to a constant because | |
373 of undefined signed overflow, other than cases covered by | |
374 WARN_STRICT_OVERFLOW_ALL. Example: folding (abs (x) >= 0) to 1 | |
375 (this is false when x == INT_MIN). */ | |
376 WARN_STRICT_OVERFLOW_CONDITIONAL = 2, | |
377 /* Overflow warning about changes to comparisons other than folding | |
378 them to a constant. Example: folding (x + 1 > 1) to (x > 0). */ | |
379 WARN_STRICT_OVERFLOW_COMPARISON = 3, | |
380 /* Overflow warnings not covered by the above cases. Example: | |
381 folding ((x * 10) / 5) to (x * 2). */ | |
382 WARN_STRICT_OVERFLOW_MISC = 4, | |
383 /* Overflow warnings about reducing magnitude of constants in | |
384 comparison. Example: folding (x + 2 > y) to (x + 1 >= y). */ | |
385 WARN_STRICT_OVERFLOW_MAGNITUDE = 5 | |
386 }; | |
387 | |
388 /* Whether to emit an overflow warning whose code is C. */ | |
389 #define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c)) | |
390 | |
391 #endif /* ! GCC_FLAGS_H */ |