gcc/builtins.def

   1 /* This file contains the definitions and documentation for the
   2    builtins used in the GNU compiler.
   3    Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   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.
  11
  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.
  16
  17 You should have received a copy of the GNU General Public License
  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.  */
  21
  22 /* Before including this file, you should define a macro:
  23
  24      DEF_BUILTIN (ENUM, NAME, CLASS, TYPE, LIBTYPE, BOTH_P,
  25                   FALLBACK_P, NONANSI_P)
  26
  27    This macro will be called once for each builtin function.  The
  28    ENUM will be of type `enum built_in_function', and will indicate
  29    which builtin function is being processed.  The NAME of the builtin
  30    function (which will always start with `__builtin_') is a string
  31    literal.  The CLASS is of type `enum built_in_class' and indicates
  32    what kind of builtin is being processed.
  33
  34    Some builtins are actually two separate functions.  For example,
  35    for `strcmp' there are two builtin functions; `__builtin_strcmp'
  36    and `strcmp' itself.  Both behave identically.  Other builtins
  37    define only the `__builtin' variant.  If BOTH_P is TRUE, then this
  38    builtin has both variants; otherwise, it is has only the first
  39    variant.
  40
  41    TYPE indicates the type of the function.  The symbols correspond to
  42    enumerals from builtin-types.def.  If BOTH_P is true, then LIBTYPE
  43    is the type of the non-`__builtin_' variant.  Otherwise, LIBTYPE
  44    should be ignored.
  45
  46    If FALLBACK_P is true then, if for some reason, the compiler cannot
  47    expand the builtin function directly, it will call the
  48    corresponding library function (which does not have the
  49    `__builtin_' prefix.
  50
  51    If NONANSI_P is true, then the non-`__builtin_' variant is not an
  52    ANSI/ISO library function, and so we should pretend it does not
  53    exist when compiling in ANSI conformant mode.  */
  54
  55 /* A GCC builtin (like __builtin_saveregs) is provided by the
  56    compiler, but does not correspond to a function in the standard
  57    library.  */
  58 #undef DEF_GCC_BUILTIN
  59 #define DEF_GCC_BUILTIN(ENUM, NAME, TYPE)                       \
  60   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, BT_LAST,      \
  61                false, false, false)
  62
  63
  64 /* A fallback builtin is a builtin (like __builtin_puts) that falls
  65    back to the corresopnding library function if necessary -- but
  66    for which we should not introduce the non-`__builtin' variant of
  67    the name.  */
  68 #undef DEF_FALLBACK_BUILTIN
  69 #define DEF_FALLBACK_BUILTIN(ENUM, NAME, TYPE)          \
  70   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
  71                false, true, false)
  72
  73 /* Like DEF_FALLBACK_BUILTIN, except that the function is not one that
  74    is specified by ANSI/ISO C.  So, when we're being fully conformant
  75    we ignore the version of these builtins that does not begin with
  76    __builtin.  */
  77 #undef DEF_EXT_FALLBACK_BUILTIN
  78 #define DEF_EXT_FALLBACK_BUILTIN(ENUM, NAME, TYPE)      \
  79   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
  80                false, true, true)
  81
  82 /* A library builtin (like __builtin_strchr) is a builtin equivalent
  83    of an ANSI/ISO standard library function.  In addition to the
  84    `__builtin' version, we will create an ordinary version (e.g,
  85    `strchr') as well.  If we cannot compute the answer using the
  86    builtin function, we will fall back to the standard library
  87    version. */
  88 #undef DEF_LIB_BUILTIN
  89 #define DEF_LIB_BUILTIN(ENUM, NAME, TYPE)               \
  90   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
  91                true, true, false)
  92
  93 /* Like DEF_LIB_BUILTIN, except that a call to the builtin should
  94    never fall back to the library version.  */
  95 #undef DEF_LIB_ALWAYS_BUILTIN
  96 #define DEF_LIB_ALWAYS_BUILTIN(ENUM, NAME, TYPE)        \
  97   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
  98                true, false, true)
  99
 100 /* Like DEF_LIB_BUILTIN, except that the function is not one that is
 101    specified by ANSI/ISO C.  So, when we're being fully conformant we
 102    ignore the version of these builtins that does not begin with
 103    __builtin.  */
 104 #undef DEF_EXT_LIB_BUILTIN
 105 #define DEF_EXT_LIB_BUILTIN(ENUM, NAME, TYPE)           \
 106   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
 107                true, true, true)
 108
 109 /* Like DEF_LIB_BUILTIN, except that the function is only a part of
 110    the standard in C99 or above.  */
 111 #undef DEF_C99_BUILTIN
 112 #define DEF_C99_BUILTIN(ENUM, NAME, TYPE)               \
 113   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
 114                true, !flag_isoc99, true)
 115
 116 /* Like DEF_LIB_BUILTIN, except that the function is expanded in the
 117    front-end.  */
 118 #undef DEF_FRONT_END_LIB_BUILTIN
 119 #define DEF_FRONT_END_LIB_BUILTIN(ENUM, NAME, TYPE)             \
 120   DEF_BUILTIN (ENUM, NAME, BUILT_IN_FRONTEND, TYPE, TYPE,       \
 121                true, true, false)
 122
 123 /* Like DEF_FRONT_END_LIB_BUILTIN, except that the function is not one
 124    that is specified by ANSI/ISO C.  So, when we're being fully
 125    conformant we ignore the version of these builtins that does not
 126    begin with __builtin.  */
 127 #undef DEF_EXT_FRONT_END_LIB_BUILTIN
 128 #define DEF_EXT_FRONT_END_LIB_BUILTIN(ENUM, NAME, TYPE)         \
 129   DEF_BUILTIN (ENUM, NAME, BUILT_IN_FRONTEND, TYPE, TYPE,       \
 130                true, true, true)
 131
 132 /* A built-in that is not currently used.  */
 133 #undef DEF_UNUSED_BUILTIN
 134 #define DEF_UNUSED_BUILTIN(X)                                   \
 135   DEF_BUILTIN (X, (const char *) NULL, NOT_BUILT_IN, BT_LAST,   \
 136                BT_LAST, false, false, false)
 137
 138 /* If SMALL_STACK is defined, then `alloca' is only defined in its
 139    `__builtin' form.  */
 140 #if SMALL_STACK
 141 DEF_FALLBACK_BUILTIN(BUILT_IN_ALLOCA,
 142                      "__builtin_alloca",
 143                      BT_FN_PTR_SIZE)
 144 #else
 145 DEF_EXT_LIB_BUILTIN(BUILT_IN_ALLOCA,
 146                     "__builtin_alloca",
 147                     BT_FN_PTR_SIZE)
 148 #endif
 149
 150 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_ABS,
 151                        "__builtin_abs",
 152                        BT_FN_INT_INT)
 153 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_LABS,
 154                        "__builtin_labs",
 155                        BT_FN_LONG_LONG)
 156
 157 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_FABS,
 158                        "__builtin_fabs",
 159                        BT_FN_DOUBLE_DOUBLE)
 160 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_FABSF,
 161                        "__builtin_fabsf",
 162                        BT_FN_FLOAT_FLOAT)
 163 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_FABSL,
 164                        "__builtin_fabsl",
 165                        BT_FN_LONG_DOUBLE_LONG_DOUBLE)
 166
 167 DEF_C99_BUILTIN(BUILT_IN_LLABS,
 168                 "__builtin_llabs",
 169                 BT_FN_LONGLONG_LONGLONG)
 170 DEF_C99_BUILTIN(BUILT_IN_IMAXABS,
 171                 "__builtin_imaxabs",
 172                 BT_FN_INTMAX_INTMAX)
 173 DEF_C99_BUILTIN(BUILT_IN_CONJ,
 174                 "__builtin_conj",
 175                 BT_FN_COMPLEX_DOUBLE_COMPLEX_DOUBLE)
 176 DEF_C99_BUILTIN(BUILT_IN_CONJF,
 177                 "__builtin_conjf",
 178                 BT_FN_COMPLEX_FLOAT_COMPLEX_FLOAT)
 179 DEF_C99_BUILTIN(BUILT_IN_CONJL,
 180                 "__builtin_conjl",
 181                 BT_FN_COMPLEX_LONG_DOUBLE_COMPLEX_LONG_DOUBLE)
 182 DEF_C99_BUILTIN(BUILT_IN_CREAL,
 183                 "__builtin_creal",
 184                 BT_FN_DOUBLE_COMPLEX_DOUBLE)
 185 DEF_C99_BUILTIN(BUILT_IN_CREALF,
 186                 "__builtin_crealf",
 187                 BT_FN_FLOAT_COMPLEX_FLOAT)
 188 DEF_C99_BUILTIN(BUILT_IN_CREALL,
 189                 "__builtin_creall",
 190                 BT_FN_LONG_DOUBLE_COMPLEX_LONG_DOUBLE)
 191 DEF_C99_BUILTIN(BUILT_IN_CIMAG,
 192                 "__builtin_cimag",
 193                 BT_FN_DOUBLE_COMPLEX_DOUBLE)
 194 DEF_C99_BUILTIN(BUILT_IN_CIMAGF,
 195                 "__builtin_cimagf",
 196                 BT_FN_FLOAT_COMPLEX_FLOAT)
 197 DEF_C99_BUILTIN(BUILT_IN_CIMAGL,
 198                 "__builtin_cimagl",
 199                 BT_FN_LONG_DOUBLE_COMPLEX_LONG_DOUBLE)
 200
 201 DEF_UNUSED_BUILTIN(BUILT_IN_DIV)
 202 DEF_UNUSED_BUILTIN(BUILT_IN_LDIV)
 203 DEF_UNUSED_BUILTIN(BUILT_IN_FFLOOR)
 204 DEF_UNUSED_BUILTIN(BUILT_IN_FCEIL)
 205 DEF_UNUSED_BUILTIN(BUILT_IN_FMOD)
 206 DEF_UNUSED_BUILTIN(BUILT_IN_FREM)
 207
 208 /* The system prototypes for `bzero' and `bcmp' functions have many
 209    variations, so don't specify parameters to avoid conflicts.  The
 210    expand_* functions check the argument types anyway.  */
 211 DEF_BUILTIN (BUILT_IN_BZERO,
 212              "__builtin_bzero",
 213              BUILT_IN_NORMAL,
 214              BT_FN_VOID_TRAD_PTR_LEN,
 215              BT_FN_VOID_VAR,
 216              true, true, true)
 217 DEF_BUILTIN (BUILT_IN_BCMP,
 218              "__builtin_bcmp",
 219              BUILT_IN_NORMAL,
 220              BT_FN_INT_TRAD_CONST_PTR_TRAD_CONST_PTR_LEN,
 221              BT_FN_INT_VAR,
 222              true, true, true)
 223
 224 DEF_EXT_LIB_BUILTIN(BUILT_IN_FFS,
 225                     "__builtin_ffs",
 226                     BT_FN_INT_INT)
 227 DEF_EXT_LIB_BUILTIN(BUILT_IN_INDEX,
 228                     "__builtin_index",
 229                     BT_FN_STRING_CONST_STRING_INT)
 230 DEF_EXT_LIB_BUILTIN(BUILT_IN_RINDEX,
 231                     "__builtin_rindex",
 232                     BT_FN_STRING_CONST_STRING_INT)
 233
 234 DEF_LIB_BUILTIN(BUILT_IN_MEMCPY,
 235                 "__builtin_memcpy",
 236                 BT_FN_TRAD_PTR_PTR_CONST_PTR_SIZE)
 237 DEF_LIB_BUILTIN(BUILT_IN_MEMCMP,
 238                 "__builtin_memcmp",
 239                 BT_FN_INT_CONST_PTR_CONST_PTR_SIZE)
 240 DEF_LIB_BUILTIN(BUILT_IN_MEMSET,
 241                 "__builtin_memset",
 242                 BT_FN_TRAD_PTR_PTR_INT_SIZE)
 243
 244 DEF_LIB_BUILTIN(BUILT_IN_STRCAT,
 245                 "__builtin_strcat",
 246                 BT_FN_STRING_STRING_CONST_STRING)
 247 DEF_LIB_BUILTIN(BUILT_IN_STRNCAT,
 248                 "__builtin_strncat",
 249                 BT_FN_STRING_STRING_CONST_STRING_SIZE)
 250 DEF_LIB_BUILTIN(BUILT_IN_STRCPY,
 251                 "__builtin_strcpy",
 252                 BT_FN_STRING_STRING_CONST_STRING)
 253 DEF_LIB_BUILTIN(BUILT_IN_STRNCPY,
 254                 "__builtin_strncpy",
 255                 BT_FN_STRING_STRING_CONST_STRING_SIZE)
 256 DEF_LIB_BUILTIN(BUILT_IN_STRCMP,
 257                 "__builtin_strcmp",
 258                 BT_FN_INT_CONST_STRING_CONST_STRING)
 259 DEF_LIB_BUILTIN(BUILT_IN_STRNCMP,
 260                 "__builtin_strncmp",
 261                 BT_FN_INT_CONST_STRING_CONST_STRING_SIZE)
 262 DEF_LIB_BUILTIN(BUILT_IN_STRLEN,
 263                 "__builtin_strlen",
 264                 BT_FN_LEN_CONST_STRING)
 265 DEF_LIB_BUILTIN(BUILT_IN_STRSTR,
 266                 "__builtin_strstr",
 267                 BT_FN_STRING_CONST_STRING_CONST_STRING)
 268 DEF_LIB_BUILTIN(BUILT_IN_STRPBRK,
 269                 "__builtin_strpbrk",
 270                 BT_FN_STRING_CONST_STRING_CONST_STRING)
 271 DEF_LIB_BUILTIN(BUILT_IN_STRSPN,
 272                 "__builtin_strspn",
 273                 BT_FN_SIZE_CONST_STRING_CONST_STRING)
 274 DEF_LIB_BUILTIN(BUILT_IN_STRCSPN,
 275                 "__builtin_strcspn",
 276                 BT_FN_SIZE_CONST_STRING_CONST_STRING)
 277 DEF_LIB_BUILTIN(BUILT_IN_STRCHR,
 278                 "__builtin_strchr",
 279                 BT_FN_STRING_CONST_STRING_INT)
 280 DEF_LIB_BUILTIN(BUILT_IN_STRRCHR,
 281                 "__builtin_strrchr",
 282                 BT_FN_STRING_CONST_STRING_INT)
 283
 284 DEF_LIB_BUILTIN(BUILT_IN_SQRT,
 285                 "__builtin_sqrt",
 286                 BT_FN_DOUBLE_DOUBLE)
 287 DEF_LIB_BUILTIN(BUILT_IN_SIN,
 288                 "__builtin_sin",
 289                 BT_FN_DOUBLE_DOUBLE)
 290 DEF_LIB_BUILTIN(BUILT_IN_COS,
 291                 "__builtin_cos",
 292                 BT_FN_DOUBLE_DOUBLE)
 293 DEF_LIB_BUILTIN(BUILT_IN_SQRTF,
 294                 "__builtin_sqrtf",
 295                 BT_FN_FLOAT_FLOAT)
 296 DEF_LIB_BUILTIN(BUILT_IN_SINF,
 297                 "__builtin_sinf",
 298                 BT_FN_FLOAT_FLOAT)
 299 DEF_LIB_BUILTIN(BUILT_IN_COSF,
 300                 "__builtin_cosf",
 301                 BT_FN_FLOAT_FLOAT)
 302 DEF_LIB_BUILTIN(BUILT_IN_SQRTL,
 303                 "__builtin_sqrtl",
 304                 BT_FN_LONG_DOUBLE_LONG_DOUBLE)
 305 DEF_LIB_BUILTIN(BUILT_IN_SINL,
 306                 "__builtin_sinl",
 307                 BT_FN_LONG_DOUBLE_LONG_DOUBLE)
 308 DEF_LIB_BUILTIN(BUILT_IN_COSL,
 309                 "__builtin_cosl",
 310                 BT_FN_LONG_DOUBLE_LONG_DOUBLE)
 311
 312 DEF_UNUSED_BUILTIN(BUILT_IN_GETEXP)
 313 DEF_UNUSED_BUILTIN(BUILT_IN_GETMAN)
 314
 315 DEF_GCC_BUILTIN(BUILT_IN_SAVEREGS,
 316                 "__builtin_saveregs",
 317                 BT_FN_PTR_VAR)
 318 DEF_GCC_BUILTIN(BUILT_IN_CLASSIFY_TYPE,
 319                 "__builtin_classify_type",
 320                 BT_FN_INT_VAR)
 321 DEF_GCC_BUILTIN(BUILT_IN_NEXT_ARG,
 322                 "__builtin_next_arg",
 323                 BT_FN_PTR_VAR)
 324 DEF_GCC_BUILTIN(BUILT_IN_ARGS_INFO,
 325                 "__builtin_args_info",
 326                 BT_FN_INT_INT)
 327 DEF_GCC_BUILTIN(BUILT_IN_CONSTANT_P,
 328                 "__builtin_constant_p",
 329                 BT_FN_INT_VAR)
 330 DEF_GCC_BUILTIN(BUILT_IN_FRAME_ADDRESS,
 331                 "__builtin_frame_address",
 332                 BT_FN_PTR_UNSIGNED)
 333 DEF_GCC_BUILTIN(BUILT_IN_RETURN_ADDRESS,
 334                 "__builtin_return_address",
 335                 BT_FN_PTR_UNSIGNED)
 336 DEF_GCC_BUILTIN(BUILT_IN_AGGREGATE_INCOMING_ADDRESS,
 337                 "__builtin_aggregate_incoming_address",
 338                 BT_FN_PTR_VAR)
 339 DEF_GCC_BUILTIN(BUILT_IN_APPLY_ARGS,
 340                 "__builtin_apply_args",
 341                 BT_FN_PTR_VAR)
 342 DEF_GCC_BUILTIN(BUILT_IN_APPLY,
 343                 "__builtin_apply",
 344                 BT_FN_PTR_PTR_FN_VOID_VAR_PTR_SIZE)
 345 DEF_GCC_BUILTIN(BUILT_IN_RETURN,
 346                 "__builtin_return",
 347                 BT_FN_VOID_PTR)
 348 DEF_GCC_BUILTIN(BUILT_IN_SETJMP,
 349                 "__builtin_setjmp",
 350                 BT_FN_INT_PTR)
 351 DEF_GCC_BUILTIN(BUILT_IN_LONGJMP,
 352                 "__builtin_longjmp",
 353                 BT_FN_VOID_PTR_INT)
 354 DEF_GCC_BUILTIN(BUILT_IN_TRAP,
 355                 "__builtin_trap",
 356                 BT_FN_VOID)
 357 DEF_GCC_BUILTIN(BUILT_IN_PREFETCH,
 358                 "__builtin_prefetch",
 359                 BT_FN_VOID_PTR_VAR)
 360
 361 /* Stdio builtins.  */
 362 DEF_FALLBACK_BUILTIN(BUILT_IN_PUTCHAR,
 363                     "__builtin_putchar",
 364                      BT_FN_INT_INT)
 365 DEF_FALLBACK_BUILTIN(BUILT_IN_PUTS,
 366                      "__builtin_puts",
 367                      BT_FN_INT_CONST_STRING)
 368 DEF_FRONT_END_LIB_BUILTIN(BUILT_IN_PRINTF,
 369                           "__builtin_printf",
 370                           BT_FN_INT_CONST_STRING_VAR)
 371 DEF_FALLBACK_BUILTIN(BUILT_IN_FPUTC,
 372                      "__builtin_fputc",
 373                      BT_FN_INT_INT_PTR)
 374 /* Declare the __builtin_ style with arguments and the regular style
 375    without them.  We rely on stdio.h to supply the arguments for the
 376    regular style declaration since we had to use void* instead of
 377    FILE* in the __builtin_ prototype supplied here.  */
 378 DEF_BUILTIN (BUILT_IN_FPUTS,
 379              "__builtin_fputs",
 380              BUILT_IN_NORMAL,
 381              BT_FN_INT_CONST_STRING_PTR,
 382              BT_FN_INT_VAR,
 383              true, true, false)
 384 DEF_FALLBACK_BUILTIN(BUILT_IN_FWRITE,
 385                      "__builtin_fwrite",
 386                      BT_FN_SIZE_CONST_PTR_SIZE_SIZE_PTR)
 387 DEF_FRONT_END_LIB_BUILTIN(BUILT_IN_FPRINTF,
 388                          "__builtin_fprintf",
 389                          BT_FN_INT_PTR_CONST_STRING_VAR)
 390
 391 /* Stdio unlocked builtins.  */
 392
 393 DEF_EXT_FALLBACK_BUILTIN(BUILT_IN_PUTCHAR_UNLOCKED,
 394                          "__builtin_putchar_unlocked",
 395                          BT_FN_INT_INT)
 396 DEF_EXT_FALLBACK_BUILTIN(BUILT_IN_PUTS_UNLOCKED,
 397                          "__builtin_puts_unlocked",
 398                          BT_FN_INT_CONST_STRING)
 399 DEF_EXT_FRONT_END_LIB_BUILTIN(BUILT_IN_PRINTF_UNLOCKED,
 400                               "__builtin_printf_unlocked",
 401                               BT_FN_INT_CONST_STRING_VAR)
 402 DEF_EXT_FALLBACK_BUILTIN(BUILT_IN_FPUTC_UNLOCKED,
 403                          "__builtin_fputc_unlocked",
 404                          BT_FN_INT_INT_PTR)
 405 /* Declare the __builtin_ style with arguments and the regular style
 406    without them.  We rely on stdio.h to supply the arguments for the
 407    regular style declaration since we had to use void* instead of
 408    FILE* in the __builtin_ prototype supplied here.  */
 409 DEF_BUILTIN (BUILT_IN_FPUTS_UNLOCKED,
 410              "__builtin_fputs_unlocked",
 411              BUILT_IN_NORMAL,
 412              BT_FN_INT_CONST_STRING_PTR,
 413              BT_FN_INT_VAR,
 414              true, true, true)
 415 DEF_EXT_FALLBACK_BUILTIN(BUILT_IN_FWRITE_UNLOCKED,
 416                          "__builtin_fwrite_unlocked",
 417                          BT_FN_SIZE_CONST_PTR_SIZE_SIZE_PTR)
 418 DEF_EXT_FRONT_END_LIB_BUILTIN(BUILT_IN_FPRINTF_UNLOCKED,
 419                               "__builtin_fprintf_unlocked",
 420                               BT_FN_INT_PTR_CONST_STRING_VAR)
 421
 422   /* ISO C99 floating point unordered comparisons.  */
 423 DEF_GCC_BUILTIN(BUILT_IN_ISGREATER,
 424                 "__builtin_isgreater",
 425                 BT_FN_INT_VAR)
 426 DEF_GCC_BUILTIN(BUILT_IN_ISGREATEREQUAL,
 427                 "__builtin_isgreaterequal",
 428                 BT_FN_INT_VAR)
 429 DEF_GCC_BUILTIN(BUILT_IN_ISLESS,
 430                 "__builtin_isless",
 431                 BT_FN_INT_VAR)
 432 DEF_GCC_BUILTIN(BUILT_IN_ISLESSEQUAL,
 433                 "__builtin_islessequal",
 434                 BT_FN_INT_VAR)
 435 DEF_GCC_BUILTIN(BUILT_IN_ISLESSGREATER,
 436                 "__builtin_islessgreater",
 437                 BT_FN_INT_VAR)
 438 DEF_GCC_BUILTIN(BUILT_IN_ISUNORDERED,
 439                 "__builtin_isunordered",
 440                 BT_FN_INT_VAR)
 441
 442 /* Various hooks for the DWARF 2 __throw routine.  */
 443 DEF_GCC_BUILTIN(BUILT_IN_UNWIND_INIT,
 444                 "__builtin_unwind_init",
 445                 BT_FN_VOID)
 446 DEF_GCC_BUILTIN(BUILT_IN_DWARF_CFA,
 447                 "__builtin_dwarf_cfa",
 448                 BT_FN_PTR)
 449 DEF_GCC_BUILTIN(BUILT_IN_DWARF_FP_REGNUM,
 450                 "__builtin_dwarf_fp_regnum",
 451                 BT_FN_UNSIGNED)
 452 DEF_GCC_BUILTIN(BUILT_IN_INIT_DWARF_REG_SIZES,
 453                 "__builtin_init_dwarf_reg_size_table",
 454                 BT_FN_VOID_PTR)
 455 DEF_GCC_BUILTIN(BUILT_IN_FROB_RETURN_ADDR,
 456                 "__builtin_frob_return_addr",
 457                 BT_FN_PTR_PTR)
 458 DEF_GCC_BUILTIN(BUILT_IN_EXTRACT_RETURN_ADDR,
 459                 "__builtin_extract_return_addr",
 460                 BT_FN_PTR_PTR)
 461 DEF_GCC_BUILTIN(BUILT_IN_EH_RETURN,
 462                 "__builtin_eh_return",
 463                 BT_FN_VOID_PTRMODE_PTR)
 464 DEF_GCC_BUILTIN(BUILT_IN_EH_RETURN_DATA_REGNO,
 465                 "__builtin_eh_return_data_regno",
 466                 BT_FN_INT_INT)
 467
 468 DEF_GCC_BUILTIN(BUILT_IN_VARARGS_START,
 469                 "__builtin_varargs_start",
 470                 BT_FN_VOID_VALIST_REF)
 471 DEF_GCC_BUILTIN(BUILT_IN_STDARG_START,
 472                 "__builtin_stdarg_start",
 473                 BT_FN_VOID_VALIST_REF_VAR)
 474 DEF_GCC_BUILTIN(BUILT_IN_VA_END,
 475                 "__builtin_va_end",
 476                 BT_FN_VOID_VALIST_REF)
 477 DEF_GCC_BUILTIN(BUILT_IN_VA_COPY,
 478                 "__builtin_va_copy",
 479                 BT_FN_VOID_VALIST_REF_VALIST_ARG)
 480 DEF_GCC_BUILTIN(BUILT_IN_EXPECT,
 481                 "__builtin_expect",
 482                 BT_FN_LONG_LONG_LONG)
 483
 484 /* C++ extensions */
 485 DEF_UNUSED_BUILTIN(BUILT_IN_NEW)
 486 DEF_UNUSED_BUILTIN(BUILT_IN_VEC_NEW)
 487 DEF_UNUSED_BUILTIN(BUILT_IN_DELETE)
 488 DEF_UNUSED_BUILTIN(BUILT_IN_VEC_DELETE)