Mercurial > hg > CbC > CbC_gcc
annotate gcc/flags.h @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | a06113de4d67 |
| children | b7f97abdc517 |
| rev | line source |
|---|---|
| 0 | 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 | |
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114 /* True if this is the LTO front end (lto1). This is used to disable |
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115 gimple generation and lowering passes that are normally run on the |
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116 output of a front end. These passes must be bypassed for lto since |
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117 they have already been done before the gimple was written. */ |
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118 |
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119 extern bool in_lto_p; |
| 0 | 120 |
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121 /* Nonzero if we should write GIMPLE bytecode for link-time optimization. */ |
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122 |
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123 extern int flag_generate_lto; |
| 0 | 124 |
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125 /* Used to set the level of -Wstrict-aliasing, when no level is specified. |
| 0 | 126 The external way to set the default level is to use |
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127 -Wstrict-aliasing=level. |
| 0 | 128 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified, |
| 129 and 0 otherwise. After calling this function, wstrict_aliasing will be | |
| 130 set to the default value of -Wstrict_aliasing=level. */ | |
| 131 | |
| 132 extern void set_Wstrict_aliasing (int onoff); | |
| 133 | |
| 134 /* Nonzero means warn about any objects definitions whose size is larger | |
| 135 than N bytes. Also want about function definitions whose returned | |
| 136 values are larger than N bytes. The value N is in `larger_than_size'. */ | |
| 137 | |
| 138 extern bool warn_larger_than; | |
| 139 extern HOST_WIDE_INT larger_than_size; | |
| 140 | |
| 141 /* Nonzero means warn about any function whose frame size is larger | |
| 142 than N bytes. */ | |
| 143 | |
| 144 extern bool warn_frame_larger_than; | |
| 145 extern HOST_WIDE_INT frame_larger_than_size; | |
| 146 | |
| 147 /* Nonzero for -dp: annotate the assembly with a comment describing the | |
| 148 pattern and alternative used. */ | |
| 149 | |
| 150 extern int flag_print_asm_name; | |
| 151 | |
| 152 /* Now the symbols that are set with `-f' switches. */ | |
| 153 | |
| 154 /* Nonzero means `char' should be signed. */ | |
| 155 | |
| 156 extern int flag_signed_char; | |
| 157 | |
| 158 /* Nonzero means give an enum type only as many bytes as it needs. A value | |
| 159 of 2 means it has not yet been initialized. */ | |
| 160 | |
| 161 extern int flag_short_enums; | |
| 162 | |
| 163 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ | |
| 164 | |
| 165 extern int flag_pcc_struct_return; | |
| 166 | |
| 167 /* 0 means straightforward implementation of complex divide acceptable. | |
| 168 1 means wide ranges of inputs must work for complex divide. | |
| 169 2 means C99-like requirements for complex multiply and divide. */ | |
| 170 | |
| 171 extern int flag_complex_method; | |
| 172 | |
| 173 /* Nonzero if we are only using compiler to check syntax errors. */ | |
| 174 | |
| 175 extern int rtl_dump_and_exit; | |
| 176 | |
| 177 /* Nonzero means we should save auxiliary info into a .X file. */ | |
| 178 | |
| 179 extern int flag_gen_aux_info; | |
| 180 | |
| 181 /* Nonzero means suppress output of instruction numbers and line number | |
| 182 notes in debugging dumps. */ | |
| 183 | |
| 184 extern int flag_dump_unnumbered; | |
| 185 | |
| 186 /* Nonzero means change certain warnings into errors. | |
| 187 Usually these are warnings about failure to conform to some standard. */ | |
| 188 | |
| 189 extern int flag_pedantic_errors; | |
| 190 | |
| 191 /* Nonzero means make permerror produce warnings instead of errors. */ | |
| 192 | |
| 193 extern int flag_permissive; | |
| 194 | |
| 195 /* Nonzero if we are compiling code for a shared library, zero for | |
| 196 executable. */ | |
| 197 | |
| 198 extern int flag_shlib; | |
| 199 | |
| 200 /* -dA causes debug information to be produced in | |
| 201 the generated assembly code (to make it more readable). This option | |
| 202 is generally only of use to those who actually need to read the | |
| 203 generated assembly code (perhaps while debugging the compiler itself). | |
| 204 Currently, this switch is only used by dwarfout.c; however, it is intended | |
| 205 to be a catchall for printing debug information in the assembler file. */ | |
| 206 | |
| 207 extern int flag_debug_asm; | |
| 208 | |
| 209 /* Generate code for GNU or NeXT Objective-C runtime environment. */ | |
| 210 | |
| 211 extern int flag_next_runtime; | |
| 212 | |
| 213 extern int flag_dump_rtl_in_asm; | |
| 214 | |
| 215 /* The algorithm used for the integrated register allocator (IRA). */ | |
| 216 enum ira_algorithm | |
| 217 { | |
| 218 IRA_ALGORITHM_CB, | |
| 219 IRA_ALGORITHM_PRIORITY | |
| 220 }; | |
| 221 | |
| 222 extern enum ira_algorithm flag_ira_algorithm; | |
| 223 | |
| 224 /* The regions used for the integrated register allocator (IRA). */ | |
| 225 enum ira_region | |
| 226 { | |
| 227 IRA_REGION_ONE, | |
| 228 IRA_REGION_ALL, | |
| 229 IRA_REGION_MIXED | |
| 230 }; | |
| 231 | |
| 232 extern enum ira_region flag_ira_region; | |
| 233 | |
| 234 extern unsigned int flag_ira_verbose; | |
| 235 | |
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236 /* The options for excess precision. */ |
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237 enum excess_precision |
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238 { |
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239 EXCESS_PRECISION_DEFAULT, |
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240 EXCESS_PRECISION_FAST, |
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241 EXCESS_PRECISION_STANDARD |
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242 }; |
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243 |
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244 /* The excess precision specified on the command line, or defaulted by |
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245 the front end. */ |
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246 extern enum excess_precision flag_excess_precision_cmdline; |
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247 |
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248 /* The excess precision currently in effect. */ |
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249 extern enum excess_precision flag_excess_precision; |
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250 |
| 0 | 251 |
| 252 /* Other basic status info about current function. */ | |
| 253 | |
| 254 /* Nonzero if subexpressions must be evaluated from left-to-right. */ | |
| 255 extern int flag_evaluation_order; | |
| 256 | |
| 257 /* Value of the -G xx switch, and whether it was passed or not. */ | |
| 258 extern unsigned HOST_WIDE_INT g_switch_value; | |
| 259 extern bool g_switch_set; | |
| 260 | |
| 261 /* Same for selective scheduling. */ | |
| 262 extern bool sel_sched_switch_set; | |
| 263 | |
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264 /* Whether to run the warn_unused_result attribute pass. */ |
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265 extern bool flag_warn_unused_result; |
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266 |
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267 /* Values of the -falign-* flags: how much to align labels in code. |
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268 0 means `use default', 1 means `don't align'. |
| 0 | 269 For each variable, there is an _log variant which is the power |
| 270 of two not less than the variable, for .align output. */ | |
| 271 | |
| 272 extern int align_loops_log; | |
| 273 extern int align_loops_max_skip; | |
| 274 extern int align_jumps_log; | |
| 275 extern int align_jumps_max_skip; | |
| 276 extern int align_labels_log; | |
| 277 extern int align_labels_max_skip; | |
| 278 extern int align_functions_log; | |
| 279 | |
| 280 /* Nonzero if we dump in VCG format, not plain text. */ | |
| 281 extern int dump_for_graph; | |
| 282 | |
| 283 /* Selection of the graph form. */ | |
| 284 enum graph_dump_types | |
| 285 { | |
| 286 no_graph = 0, | |
| 287 vcg | |
| 288 }; | |
| 289 extern enum graph_dump_types graph_dump_format; | |
| 290 | |
| 291 /* Nonzero means to collect statistics which might be expensive | |
| 292 and to print them when we are done. */ | |
| 293 extern int flag_detailed_statistics; | |
| 294 | |
| 295 /* Nonzero means that we defer emitting functions until they are actually | |
| 296 used. */ | |
| 297 extern int flag_remove_unreachable_functions; | |
| 298 | |
| 299 /* Nonzero if we should track variables. */ | |
| 300 extern int flag_var_tracking; | |
| 301 | |
| 302 /* True if flag_speculative_prefetching was set by user. Used to suppress | |
| 303 warning message in case flag was set by -fprofile-{generate,use}. */ | |
| 304 extern bool flag_speculative_prefetching_set; | |
| 305 | |
| 306 /* Type of stack check. */ | |
| 307 enum stack_check_type | |
| 308 { | |
| 309 /* Do not check the stack. */ | |
| 310 NO_STACK_CHECK = 0, | |
| 311 | |
| 312 /* Check the stack generically, i.e. assume no specific support | |
| 313 from the target configuration files. */ | |
| 314 GENERIC_STACK_CHECK, | |
| 315 | |
| 316 /* Check the stack and rely on the target configuration files to | |
| 317 check the static frame of functions, i.e. use the generic | |
| 318 mechanism only for dynamic stack allocations. */ | |
| 319 STATIC_BUILTIN_STACK_CHECK, | |
| 320 | |
| 321 /* Check the stack and entirely rely on the target configuration | |
| 322 files, i.e. do not use the generic mechanism at all. */ | |
| 323 FULL_BUILTIN_STACK_CHECK | |
| 324 }; | |
| 325 extern enum stack_check_type flag_stack_check; | |
| 326 | |
| 327 /* Returns TRUE if generated code should match ABI version N or | |
| 328 greater is in use. */ | |
| 329 | |
| 330 #define abi_version_at_least(N) \ | |
| 331 (flag_abi_version == 0 || flag_abi_version >= (N)) | |
| 332 | |
| 333 /* Return whether the function should be excluded from | |
| 334 instrumentation. */ | |
| 335 extern bool flag_instrument_functions_exclude_p (tree fndecl); | |
| 336 | |
| 337 /* True if the given mode has a NaN representation and the treatment of | |
| 338 NaN operands is important. Certain optimizations, such as folding | |
| 339 x * 0 into 0, are not correct for NaN operands, and are normally | |
| 340 disabled for modes with NaNs. The user can ask for them to be | |
| 341 done anyway using the -funsafe-math-optimizations switch. */ | |
| 342 #define HONOR_NANS(MODE) \ | |
| 343 (MODE_HAS_NANS (MODE) && !flag_finite_math_only) | |
| 344 | |
| 345 /* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ | |
| 346 #define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE)) | |
| 347 | |
| 348 /* As for HONOR_NANS, but true if the mode can represent infinity and | |
| 349 the treatment of infinite values is important. */ | |
| 350 #define HONOR_INFINITIES(MODE) \ | |
| 351 (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only) | |
| 352 | |
| 353 /* Like HONOR_NANS, but true if the given mode distinguishes between | |
| 354 positive and negative zero, and the sign of zero is important. */ | |
| 355 #define HONOR_SIGNED_ZEROS(MODE) \ | |
| 356 (MODE_HAS_SIGNED_ZEROS (MODE) && flag_signed_zeros) | |
| 357 | |
| 358 /* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, | |
| 359 and the rounding mode is important. */ | |
| 360 #define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
| 361 (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) | |
| 362 | |
| 363 /* True if overflow wraps around for the given integral type. That | |
| 364 is, TYPE_MAX + 1 == TYPE_MIN. */ | |
| 365 #define TYPE_OVERFLOW_WRAPS(TYPE) \ | |
| 366 (TYPE_UNSIGNED (TYPE) || flag_wrapv) | |
| 367 | |
| 368 /* True if overflow is undefined for the given integral type. We may | |
| 369 optimize on the assumption that values in the type never overflow. | |
| 370 | |
| 371 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED | |
| 372 must issue a warning based on warn_strict_overflow. In some cases | |
| 373 it will be appropriate to issue the warning immediately, and in | |
| 374 other cases it will be appropriate to simply set a flag and let the | |
| 375 caller decide whether a warning is appropriate or not. */ | |
| 376 #define TYPE_OVERFLOW_UNDEFINED(TYPE) \ | |
| 377 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow) | |
| 378 | |
| 379 /* True if overflow for the given integral type should issue a | |
| 380 trap. */ | |
| 381 #define TYPE_OVERFLOW_TRAPS(TYPE) \ | |
| 382 (!TYPE_UNSIGNED (TYPE) && flag_trapv) | |
| 383 | |
| 384 /* True if pointer types have undefined overflow. */ | |
| 385 #define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow) | |
| 386 | |
| 387 /* Names for the different levels of -Wstrict-overflow=N. The numeric | |
| 388 values here correspond to N. */ | |
| 389 | |
| 390 enum warn_strict_overflow_code | |
| 391 { | |
| 392 /* Overflow warning that should be issued with -Wall: a questionable | |
| 393 construct that is easy to avoid even when using macros. Example: | |
| 394 folding (x + CONSTANT > x) to 1. */ | |
| 395 WARN_STRICT_OVERFLOW_ALL = 1, | |
| 396 /* Overflow warning about folding a comparison to a constant because | |
| 397 of undefined signed overflow, other than cases covered by | |
| 398 WARN_STRICT_OVERFLOW_ALL. Example: folding (abs (x) >= 0) to 1 | |
| 399 (this is false when x == INT_MIN). */ | |
| 400 WARN_STRICT_OVERFLOW_CONDITIONAL = 2, | |
| 401 /* Overflow warning about changes to comparisons other than folding | |
| 402 them to a constant. Example: folding (x + 1 > 1) to (x > 0). */ | |
| 403 WARN_STRICT_OVERFLOW_COMPARISON = 3, | |
| 404 /* Overflow warnings not covered by the above cases. Example: | |
| 405 folding ((x * 10) / 5) to (x * 2). */ | |
| 406 WARN_STRICT_OVERFLOW_MISC = 4, | |
| 407 /* Overflow warnings about reducing magnitude of constants in | |
| 408 comparison. Example: folding (x + 2 > y) to (x + 1 >= y). */ | |
| 409 WARN_STRICT_OVERFLOW_MAGNITUDE = 5 | |
| 410 }; | |
| 411 | |
| 412 /* Whether to emit an overflow warning whose code is C. */ | |
| 413 #define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c)) | |
| 414 | |
| 415 #endif /* ! GCC_FLAGS_H */ |