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, ATTRS)
  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    ATTRs is an attribute list as defined in builtin-attrs.def that
  56    describes the attributes of this builtin function.  */
  57
  58 /* A GCC builtin (like __builtin_saveregs) is provided by the
  59    compiler, but does not correspond to a function in the standard
  60    library.  */
  61 #undef DEF_GCC_BUILTIN
  62 #define DEF_GCC_BUILTIN(ENUM, NAME, TYPE)                       \
  63   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, BT_LAST,      \
  64                false, false, false, ATTR_NULL)
  65
  66
  67 /* A fallback builtin is a builtin (like __builtin_puts) that falls
  68    back to the corresopnding library function if necessary -- but
  69    for which we should not introduce the non-`__builtin' variant of
  70    the name.  */
  71 #undef DEF_FALLBACK_BUILTIN
  72 #define DEF_FALLBACK_BUILTIN(ENUM, NAME, TYPE, ATTRS)   \
  73   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
  74                false, true, false, ATTRS)
  75
  76 /* Like DEF_FALLBACK_BUILTIN, except that the function is not one that
  77    is specified by ANSI/ISO C.  So, when we're being fully conformant
  78    we ignore the version of these builtins that does not begin with
  79    __builtin.  */
  80 #undef DEF_EXT_FALLBACK_BUILTIN
  81 #define DEF_EXT_FALLBACK_BUILTIN(ENUM, NAME, TYPE)      \
  82   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
  83                false, true, true, ATTR_NOTHROW_LIST)
  84
  85 /* A library builtin (like __builtin_strchr) is a builtin equivalent
  86    of an ANSI/ISO standard library function.  In addition to the
  87    `__builtin' version, we will create an ordinary version (e.g,
  88    `strchr') as well.  If we cannot compute the answer using the
  89    builtin function, we will fall back to the standard library
  90    version. */
  91 #undef DEF_LIB_BUILTIN
  92 #define DEF_LIB_BUILTIN(ENUM, NAME, TYPE, ATTRS)        \
  93   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
  94                true, true, false, ATTRS)
  95
  96 /* Like DEF_LIB_BUILTIN, except that a call to the builtin should
  97    never fall back to the library version.  */
  98 #undef DEF_LIB_ALWAYS_BUILTIN
  99 #define DEF_LIB_ALWAYS_BUILTIN(ENUM, NAME, TYPE)        \
 100   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
 101                true, false, true, ATTR_CONST_NOTHROW_LIST)
 102
 103 /* Like DEF_LIB_BUILTIN, except that the function is not one that is
 104    specified by ANSI/ISO C.  So, when we're being fully conformant we
 105    ignore the version of these builtins that does not begin with
 106    __builtin.  */
 107 #undef DEF_EXT_LIB_BUILTIN
 108 #define DEF_EXT_LIB_BUILTIN(ENUM, NAME, TYPE, ATTRS)    \
 109   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
 110                true, true, true, ATTRS)
 111
 112 /* Like DEF_LIB_BUILTIN, except that the function is only a part of
 113    the standard in C99 or above.  */
 114 #undef DEF_C99_BUILTIN
 115 #define DEF_C99_BUILTIN(ENUM, NAME, TYPE)               \
 116   DEF_BUILTIN (ENUM, NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
 117                true, !flag_isoc99, true, ATTR_NOTHROW_LIST)
 118
 119 /* Like DEF_LIB_BUILTIN, except that the function is expanded in the
 120    front-end.  */
 121 #undef DEF_FRONT_END_LIB_BUILTIN
 122 #define DEF_FRONT_END_LIB_BUILTIN(ENUM, NAME, TYPE, ATTRS)      \
 123   DEF_BUILTIN (ENUM, NAME, BUILT_IN_FRONTEND, TYPE, TYPE,       \
 124                true, true, false, ATTRS)
 125
 126 /* Like DEF_FRONT_END_LIB_BUILTIN, except that the function is not one
 127    that is specified by ANSI/ISO C.  So, when we're being fully
 128    conformant we ignore the version of these builtins that does not
 129    begin with __builtin.  */
 130 #undef DEF_EXT_FRONT_END_LIB_BUILTIN
 131 #define DEF_EXT_FRONT_END_LIB_BUILTIN(ENUM, NAME, TYPE, ATTRS)  \
 132   DEF_BUILTIN (ENUM, NAME, BUILT_IN_FRONTEND, TYPE, TYPE,       \
 133                true, true, true, ATTRS)
 134
 135 /* A built-in that is not currently used.  */
 136 #undef DEF_UNUSED_BUILTIN
 137 #define DEF_UNUSED_BUILTIN(X)                                   \
 138   DEF_BUILTIN (X, (const char *) NULL, NOT_BUILT_IN, BT_LAST,   \
 139                BT_LAST, false, false, false, ATTR_NOTHROW_LIST)
 140
 141 /* If SMALL_STACK is defined, then `alloca' is only defined in its
 142    `__builtin' form.  */
 143 #if SMALL_STACK
 144 DEF_FALLBACK_BUILTIN(BUILT_IN_ALLOCA,
 145                      "__builtin_alloca",
 146                      BT_FN_PTR_SIZE,
 147                      ATTR_MALLOC_NOTHROW_LIST)
 148 #else
 149 DEF_EXT_LIB_BUILTIN(BUILT_IN_ALLOCA,
 150                     "__builtin_alloca",
 151                     BT_FN_PTR_SIZE,
 152                     ATTR_MALLOC_NOTHROW_LIST)
 153 #endif
 154
 155 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_ABS,
 156                        "__builtin_abs",
 157                        BT_FN_INT_INT)
 158 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_LABS,
 159                        "__builtin_labs",
 160                        BT_FN_LONG_LONG)
 161
 162 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_FABS,
 163                        "__builtin_fabs",
 164                        BT_FN_DOUBLE_DOUBLE)
 165 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_FABSF,
 166                        "__builtin_fabsf",
 167                        BT_FN_FLOAT_FLOAT)
 168 DEF_LIB_ALWAYS_BUILTIN(BUILT_IN_FABSL,
 169                        "__builtin_fabsl",
 170                        BT_FN_LONG_DOUBLE_LONG_DOUBLE)
 171
 172 DEF_C99_BUILTIN(BUILT_IN_LLABS,
 173                 "__builtin_llabs",
 174                 BT_FN_LONGLONG_LONGLONG)
 175 DEF_C99_BUILTIN(BUILT_IN_IMAXABS,
 176                 "__builtin_imaxabs",
 177                 BT_FN_INTMAX_INTMAX)
 178 DEF_C99_BUILTIN(BUILT_IN_CONJ,
 179                 "__builtin_conj",
 180                 BT_FN_COMPLEX_DOUBLE_COMPLEX_DOUBLE)
 181 DEF_C99_BUILTIN(BUILT_IN_CONJF,
 182                 "__builtin_conjf",
 183                 BT_FN_COMPLEX_FLOAT_COMPLEX_FLOAT)
 184 DEF_C99_BUILTIN(BUILT_IN_CONJL,
 185                 "__builtin_conjl",
 186                 BT_FN_COMPLEX_LONG_DOUBLE_COMPLEX_LONG_DOUBLE)
 187 DEF_C99_BUILTIN(BUILT_IN_CREAL,
 188                 "__builtin_creal",
 189                 BT_FN_DOUBLE_COMPLEX_DOUBLE)
 190 DEF_C99_BUILTIN(BUILT_IN_CREALF,
 191                 "__builtin_crealf",
 192                 BT_FN_FLOAT_COMPLEX_FLOAT)
 193 DEF_C99_BUILTIN(BUILT_IN_CREALL,
 194                 "__builtin_creall",
 195                 BT_FN_LONG_DOUBLE_COMPLEX_LONG_DOUBLE)
 196 DEF_C99_BUILTIN(BUILT_IN_CIMAG,
 197                 "__builtin_cimag",
 198                 BT_FN_DOUBLE_COMPLEX_DOUBLE)
 199 DEF_C99_BUILTIN(BUILT_IN_CIMAGF,
 200                 "__builtin_cimagf",
 201                 BT_FN_FLOAT_COMPLEX_FLOAT)
 202 DEF_C99_BUILTIN(BUILT_IN_CIMAGL,
 203                 "__builtin_cimagl",
 204                 BT_FN_LONG_DOUBLE_COMPLEX_LONG_DOUBLE)
 205
 206 DEF_UNUSED_BUILTIN(BUILT_IN_DIV)
 207 DEF_UNUSED_BUILTIN(BUILT_IN_LDIV)
 208 DEF_UNUSED_BUILTIN(BUILT_IN_FFLOOR)
 209 DEF_UNUSED_BUILTIN(BUILT_IN_FCEIL)
 210 DEF_UNUSED_BUILTIN(BUILT_IN_FMOD)
 211 DEF_UNUSED_BUILTIN(BUILT_IN_FREM)
 212
 213 /* The system prototypes for `bzero' and `bcmp' functions have many
 214    variations, so don't specify parameters to avoid conflicts.  The
 215    expand_* functions check the argument types anyway.  */
 216 DEF_BUILTIN (BUILT_IN_BZERO,
 217              "__builtin_bzero",
 218              BUILT_IN_NORMAL,
 219              BT_FN_VOID_PTR_SIZE,
 220              BT_FN_VOID_VAR,
 221              true, true, true,
 222              ATTR_NOTHROW_LIST)
 223 DEF_BUILTIN (BUILT_IN_BCMP,
 224              "__builtin_bcmp",
 225              BUILT_IN_NORMAL,
 226              BT_FN_INT_CONST_PTR_CONST_PTR_SIZE,
 227              BT_FN_INT_VAR,
 228              true, true, true,
 229              ATTR_PURE_NOTHROW_LIST)
 230
 231 DEF_EXT_LIB_BUILTIN(BUILT_IN_FFS,
 232                     "__builtin_ffs",
 233                     BT_FN_INT_INT,
 234                     ATTR_CONST_NOTHROW_LIST)
 235 DEF_EXT_LIB_BUILTIN(BUILT_IN_INDEX,
 236                     "__builtin_index",
 237                     BT_FN_STRING_CONST_STRING_INT,
 238                     ATTR_PURE_NOTHROW_LIST)
 239 DEF_EXT_LIB_BUILTIN(BUILT_IN_RINDEX,
 240                     "__builtin_rindex",
 241                     BT_FN_STRING_CONST_STRING_INT,
 242                     ATTR_PURE_NOTHROW_LIST)
 243
 244 DEF_LIB_BUILTIN(BUILT_IN_MEMCPY,
 245                 "__builtin_memcpy",
 246                 BT_FN_PTR_PTR_CONST_PTR_SIZE,
 247                 ATTR_NOTHROW_LIST)
 248 DEF_LIB_BUILTIN(BUILT_IN_MEMCMP,
 249                 "__builtin_memcmp",
 250                 BT_FN_INT_CONST_PTR_CONST_PTR_SIZE,
 251                 ATTR_PURE_NOTHROW_LIST)
 252 DEF_LIB_BUILTIN(BUILT_IN_MEMSET,
 253                 "__builtin_memset",
 254                 BT_FN_PTR_PTR_INT_SIZE,
 255                 ATTR_NOTHROW_LIST)
 256
 257 DEF_LIB_BUILTIN(BUILT_IN_STRCAT,
 258                 "__builtin_strcat",
 259                 BT_FN_STRING_STRING_CONST_STRING,
 260                 ATTR_NOTHROW_LIST)
 261 DEF_LIB_BUILTIN(BUILT_IN_STRNCAT,
 262                 "__builtin_strncat",
 263                 BT_FN_STRING_STRING_CONST_STRING_SIZE,
 264                 ATTR_NOTHROW_LIST)
 265 DEF_LIB_BUILTIN(BUILT_IN_STRCPY,
 266                 "__builtin_strcpy",
 267                 BT_FN_STRING_STRING_CONST_STRING,
 268                 ATTR_NOTHROW_LIST)
 269 DEF_LIB_BUILTIN(BUILT_IN_STRNCPY,
 270                 "__builtin_strncpy",
 271                 BT_FN_STRING_STRING_CONST_STRING_SIZE,
 272                 ATTR_NOTHROW_LIST)
 273 DEF_LIB_BUILTIN(BUILT_IN_STRCMP,
 274                 "__builtin_strcmp",
 275                 BT_FN_INT_CONST_STRING_CONST_STRING,
 276                 ATTR_PURE_NOTHROW_LIST)
 277 DEF_LIB_BUILTIN(BUILT_IN_STRNCMP,
 278                 "__builtin_strncmp",
 279                 BT_FN_INT_CONST_STRING_CONST_STRING_SIZE,
 280                 ATTR_PURE_NOTHROW_LIST)
 281 DEF_LIB_BUILTIN(BUILT_IN_STRLEN,
 282                 "__builtin_strlen",
 283                 BT_FN_SIZE_CONST_STRING,
 284                 ATTR_PURE_NOTHROW_LIST)
 285 DEF_LIB_BUILTIN(BUILT_IN_STRSTR,
 286                 "__builtin_strstr",
 287                 BT_FN_STRING_CONST_STRING_CONST_STRING,
 288                 ATTR_PURE_NOTHROW_LIST)
 289 DEF_LIB_BUILTIN(BUILT_IN_STRPBRK,
 290                 "__builtin_strpbrk",
 291                 BT_FN_STRING_CONST_STRING_CONST_STRING,
 292                 ATTR_PURE_NOTHROW_LIST)
 293 DEF_LIB_BUILTIN(BUILT_IN_STRSPN,
 294                 "__builtin_strspn",
 295                 BT_FN_SIZE_CONST_STRING_CONST_STRING,
 296                 ATTR_PURE_NOTHROW_LIST)
 297 DEF_LIB_BUILTIN(BUILT_IN_STRCSPN,
 298                 "__builtin_strcspn",
 299                 BT_FN_SIZE_CONST_STRING_CONST_STRING,
 300                 ATTR_PURE_NOTHROW_LIST)
 301 DEF_LIB_BUILTIN(BUILT_IN_STRCHR,
 302                 "__builtin_strchr",
 303                 BT_FN_STRING_CONST_STRING_INT,
 304                 ATTR_PURE_NOTHROW_LIST)
 305 DEF_LIB_BUILTIN(BUILT_IN_STRRCHR,
 306                 "__builtin_strrchr",
 307                 BT_FN_STRING_CONST_STRING_INT,
 308                 ATTR_PURE_NOTHROW_LIST)
 309
 310 DEF_LIB_BUILTIN(BUILT_IN_SQRT,
 311                 "__builtin_sqrt",
 312                 BT_FN_DOUBLE_DOUBLE,
 313                 flag_errno_math ? ATTR_NOTHROW_LIST
 314                                 : (flag_unsafe_math_optimizations
 315                                    ? ATTR_CONST_NOTHROW_LIST
 316                                    : ATTR_PURE_NOTHROW_LIST))
 317 DEF_LIB_BUILTIN(BUILT_IN_SIN,
 318                 "__builtin_sin",
 319                 BT_FN_DOUBLE_DOUBLE,
 320                 flag_unsafe_math_optimizations ? ATTR_CONST_NOTHROW_LIST
 321                                                : ATTR_PURE_NOTHROW_LIST)
 322 DEF_LIB_BUILTIN(BUILT_IN_COS,
 323                 "__builtin_cos",
 324                 BT_FN_DOUBLE_DOUBLE,
 325                 flag_unsafe_math_optimizations ? ATTR_CONST_NOTHROW_LIST
 326                                                : ATTR_PURE_NOTHROW_LIST)
 327 DEF_LIB_BUILTIN(BUILT_IN_SQRTF,
 328                 "__builtin_sqrtf",
 329                 BT_FN_FLOAT_FLOAT,
 330                 flag_errno_math ? ATTR_NOTHROW_LIST
 331                                 : (flag_unsafe_math_optimizations
 332                                    ? ATTR_CONST_NOTHROW_LIST
 333                                    : ATTR_PURE_NOTHROW_LIST))
 334 DEF_LIB_BUILTIN(BUILT_IN_SINF,
 335                 "__builtin_sinf",
 336                 BT_FN_FLOAT_FLOAT,
 337                 flag_unsafe_math_optimizations ? ATTR_CONST_NOTHROW_LIST
 338                                                : ATTR_PURE_NOTHROW_LIST)
 339 DEF_LIB_BUILTIN(BUILT_IN_COSF,
 340                 "__builtin_cosf",
 341                 BT_FN_FLOAT_FLOAT,
 342                 flag_unsafe_math_optimizations ? ATTR_CONST_NOTHROW_LIST
 343                                                : ATTR_PURE_NOTHROW_LIST)
 344 DEF_LIB_BUILTIN(BUILT_IN_SQRTL,
 345                 "__builtin_sqrtl",
 346                 BT_FN_LONG_DOUBLE_LONG_DOUBLE,
 347                 flag_errno_math ? ATTR_NOTHROW_LIST
 348                                 : (flag_unsafe_math_optimizations
 349                                    ? ATTR_CONST_NOTHROW_LIST
 350                                    : ATTR_PURE_NOTHROW_LIST))
 351 DEF_LIB_BUILTIN(BUILT_IN_SINL,
 352                 "__builtin_sinl",
 353                 BT_FN_LONG_DOUBLE_LONG_DOUBLE,
 354                 flag_unsafe_math_optimizations ? ATTR_CONST_NOTHROW_LIST
 355                                                : ATTR_PURE_NOTHROW_LIST)
 356 DEF_LIB_BUILTIN(BUILT_IN_COSL,
 357                 "__builtin_cosl",
 358                 BT_FN_LONG_DOUBLE_LONG_DOUBLE,
 359                 flag_unsafe_math_optimizations ? ATTR_CONST_NOTHROW_LIST
 360                                                : ATTR_PURE_NOTHROW_LIST)
 361
 362 DEF_UNUSED_BUILTIN(BUILT_IN_GETEXP)
 363 DEF_UNUSED_BUILTIN(BUILT_IN_GETMAN)
 364
 365 DEF_GCC_BUILTIN(BUILT_IN_SAVEREGS,
 366                 "__builtin_saveregs",
 367                 BT_FN_PTR_VAR)
 368 DEF_GCC_BUILTIN(BUILT_IN_CLASSIFY_TYPE,
 369                 "__builtin_classify_type",
 370                 BT_FN_INT_VAR)
 371 DEF_GCC_BUILTIN(BUILT_IN_NEXT_ARG,
 372                 "__builtin_next_arg",
 373                 BT_FN_PTR_VAR)
 374 DEF_GCC_BUILTIN(BUILT_IN_ARGS_INFO,
 375                 "__builtin_args_info",
 376                 BT_FN_INT_INT)
 377 DEF_GCC_BUILTIN(BUILT_IN_CONSTANT_P,
 378                 "__builtin_constant_p",
 379                 BT_FN_INT_VAR)
 380 DEF_GCC_BUILTIN(BUILT_IN_FRAME_ADDRESS,
 381                 "__builtin_frame_address",
 382                 BT_FN_PTR_UNSIGNED)
 383 DEF_GCC_BUILTIN(BUILT_IN_RETURN_ADDRESS,
 384                 "__builtin_return_address",
 385                 BT_FN_PTR_UNSIGNED)
 386 DEF_GCC_BUILTIN(BUILT_IN_AGGREGATE_INCOMING_ADDRESS,
 387                 "__builtin_aggregate_incoming_address",
 388                 BT_FN_PTR_VAR)
 389 DEF_GCC_BUILTIN(BUILT_IN_APPLY_ARGS,
 390                 "__builtin_apply_args",
 391                 BT_FN_PTR_VAR)
 392 DEF_GCC_BUILTIN(BUILT_IN_APPLY,
 393                 "__builtin_apply",
 394                 BT_FN_PTR_PTR_FN_VOID_VAR_PTR_SIZE)
 395 DEF_GCC_BUILTIN(BUILT_IN_RETURN,
 396                 "__builtin_return",
 397                 BT_FN_VOID_PTR)
 398 DEF_GCC_BUILTIN(BUILT_IN_SETJMP,
 399                 "__builtin_setjmp",
 400                 BT_FN_INT_PTR)
 401 DEF_GCC_BUILTIN(BUILT_IN_LONGJMP,
 402                 "__builtin_longjmp",
 403                 BT_FN_VOID_PTR_INT)
 404 DEF_GCC_BUILTIN(BUILT_IN_TRAP,
 405                 "__builtin_trap",
 406                 BT_FN_VOID)
 407 DEF_GCC_BUILTIN(BUILT_IN_PREFETCH,
 408                 "__builtin_prefetch",
 409                 BT_FN_VOID_CONST_PTR_VAR)
 410
 411 /* Stdio builtins.  */
 412 DEF_FALLBACK_BUILTIN(BUILT_IN_PUTCHAR,
 413                     "__builtin_putchar",
 414                      BT_FN_INT_INT,
 415                      ATTR_NOTHROW_LIST)
 416 DEF_FALLBACK_BUILTIN(BUILT_IN_PUTS,
 417                      "__builtin_puts",
 418                      BT_FN_INT_CONST_STRING,
 419                      ATTR_NOTHROW_LIST)
 420 DEF_FRONT_END_LIB_BUILTIN(BUILT_IN_PRINTF,
 421                           "__builtin_printf",
 422                           BT_FN_INT_CONST_STRING_VAR,
 423                           ATTR_FORMAT_PRINTF_1_2)
 424 DEF_FALLBACK_BUILTIN(BUILT_IN_FPUTC,
 425                      "__builtin_fputc",
 426                      BT_FN_INT_INT_PTR,
 427                      ATTR_NOTHROW_LIST)
 428 /* Declare the __builtin_ style with arguments and the regular style
 429    without them.  We rely on stdio.h to supply the arguments for the
 430    regular style declaration since we had to use void* instead of
 431    FILE* in the __builtin_ prototype supplied here.  */
 432 DEF_BUILTIN (BUILT_IN_FPUTS,
 433              "__builtin_fputs",
 434              BUILT_IN_NORMAL,
 435              BT_FN_INT_CONST_STRING_PTR,
 436              BT_FN_INT_VAR,
 437              true, true, false, ATTR_NOTHROW_LIST)
 438 DEF_FALLBACK_BUILTIN(BUILT_IN_FWRITE,
 439                      "__builtin_fwrite",
 440                      BT_FN_SIZE_CONST_PTR_SIZE_SIZE_PTR,
 441                       ATTR_NOTHROW_LIST)
 442 DEF_FRONT_END_LIB_BUILTIN(BUILT_IN_FPRINTF,
 443                          "__builtin_fprintf",
 444                          BT_FN_INT_PTR_CONST_STRING_VAR,
 445                          ATTR_FORMAT_PRINTF_2_3)
 446
 447 /* Stdio unlocked builtins.  */
 448
 449 DEF_EXT_FALLBACK_BUILTIN(BUILT_IN_PUTCHAR_UNLOCKED,
 450                          "__builtin_putchar_unlocked",
 451                          BT_FN_INT_INT)
 452 DEF_EXT_FALLBACK_BUILTIN(BUILT_IN_PUTS_UNLOCKED,
 453                          "__builtin_puts_unlocked",
 454                          BT_FN_INT_CONST_STRING)
 455 DEF_EXT_FRONT_END_LIB_BUILTIN(BUILT_IN_PRINTF_UNLOCKED,
 456                               "__builtin_printf_unlocked",
 457                               BT_FN_INT_CONST_STRING_VAR,
 458                               ATTR_FORMAT_PRINTF_1_2)
 459 DEF_EXT_FALLBACK_BUILTIN(BUILT_IN_FPUTC_UNLOCKED,
 460                          "__builtin_fputc_unlocked",
 461                          BT_FN_INT_INT_PTR)
 462 /* Declare the __builtin_ style with arguments and the regular style
 463    without them.  We rely on stdio.h to supply the arguments for the
 464    regular style declaration since we had to use void* instead of
 465    FILE* in the __builtin_ prototype supplied here.  */
 466 DEF_BUILTIN (BUILT_IN_FPUTS_UNLOCKED,
 467              "__builtin_fputs_unlocked",
 468              BUILT_IN_NORMAL,
 469              BT_FN_INT_CONST_STRING_PTR,
 470              BT_FN_INT_VAR,
 471              true, true, true, ATTR_NOTHROW_LIST)
 472 DEF_EXT_FALLBACK_BUILTIN(BUILT_IN_FWRITE_UNLOCKED,
 473                          "__builtin_fwrite_unlocked",
 474                          BT_FN_SIZE_CONST_PTR_SIZE_SIZE_PTR)
 475 DEF_EXT_FRONT_END_LIB_BUILTIN(BUILT_IN_FPRINTF_UNLOCKED,
 476                               "__builtin_fprintf_unlocked",
 477                               BT_FN_INT_PTR_CONST_STRING_VAR,
 478                               ATTR_FORMAT_PRINTF_2_3)
 479
 480   /* ISO C99 floating point unordered comparisons.  */
 481 DEF_GCC_BUILTIN(BUILT_IN_ISGREATER,
 482                 "__builtin_isgreater",
 483                 BT_FN_INT_VAR)
 484 DEF_GCC_BUILTIN(BUILT_IN_ISGREATEREQUAL,
 485                 "__builtin_isgreaterequal",
 486                 BT_FN_INT_VAR)
 487 DEF_GCC_BUILTIN(BUILT_IN_ISLESS,
 488                 "__builtin_isless",
 489                 BT_FN_INT_VAR)
 490 DEF_GCC_BUILTIN(BUILT_IN_ISLESSEQUAL,
 491                 "__builtin_islessequal",
 492                 BT_FN_INT_VAR)
 493 DEF_GCC_BUILTIN(BUILT_IN_ISLESSGREATER,
 494                 "__builtin_islessgreater",
 495                 BT_FN_INT_VAR)
 496 DEF_GCC_BUILTIN(BUILT_IN_ISUNORDERED,
 497                 "__builtin_isunordered",
 498                 BT_FN_INT_VAR)
 499
 500 /* Various hooks for the DWARF 2 __throw routine.  */
 501 DEF_GCC_BUILTIN(BUILT_IN_UNWIND_INIT,
 502                 "__builtin_unwind_init",
 503                 BT_FN_VOID)
 504 DEF_GCC_BUILTIN(BUILT_IN_DWARF_CFA,
 505                 "__builtin_dwarf_cfa",
 506                 BT_FN_PTR)
 507 DEF_GCC_BUILTIN(BUILT_IN_DWARF_FP_REGNUM,
 508                 "__builtin_dwarf_fp_regnum",
 509                 BT_FN_UNSIGNED)
 510 DEF_GCC_BUILTIN(BUILT_IN_INIT_DWARF_REG_SIZES,
 511                 "__builtin_init_dwarf_reg_size_table",
 512                 BT_FN_VOID_PTR)
 513 DEF_GCC_BUILTIN(BUILT_IN_FROB_RETURN_ADDR,
 514                 "__builtin_frob_return_addr",
 515                 BT_FN_PTR_PTR)
 516 DEF_GCC_BUILTIN(BUILT_IN_EXTRACT_RETURN_ADDR,
 517                 "__builtin_extract_return_addr",
 518                 BT_FN_PTR_PTR)
 519 DEF_GCC_BUILTIN(BUILT_IN_EH_RETURN,
 520                 "__builtin_eh_return",
 521                 BT_FN_VOID_PTRMODE_PTR)
 522 DEF_GCC_BUILTIN(BUILT_IN_EH_RETURN_DATA_REGNO,
 523                 "__builtin_eh_return_data_regno",
 524                 BT_FN_INT_INT)
 525
 526 /* Variable argument list (stdarg.h) support */
 527 DEF_GCC_BUILTIN(BUILT_IN_VA_START,
 528                 "__builtin_va_start",
 529                 BT_FN_VOID_VALIST_REF_VAR)
 530 DEF_GCC_BUILTIN(BUILT_IN_STDARG_START,          /* backward compat */
 531                 "__builtin_stdarg_start",
 532                 BT_FN_VOID_VALIST_REF_VAR)
 533 DEF_GCC_BUILTIN(BUILT_IN_VA_END,
 534                 "__builtin_va_end",
 535                 BT_FN_VOID_VALIST_REF)
 536 DEF_GCC_BUILTIN(BUILT_IN_VA_COPY,
 537                 "__builtin_va_copy",
 538                 BT_FN_VOID_VALIST_REF_VALIST_ARG)
 539
 540 DEF_GCC_BUILTIN(BUILT_IN_EXPECT,
 541                 "__builtin_expect",
 542                 BT_FN_LONG_LONG_LONG)
 543
 544 /* C++ extensions */
 545 DEF_UNUSED_BUILTIN(BUILT_IN_NEW)
 546 DEF_UNUSED_BUILTIN(BUILT_IN_VEC_NEW)
 547 DEF_UNUSED_BUILTIN(BUILT_IN_DELETE)
 548 DEF_UNUSED_BUILTIN(BUILT_IN_VEC_DELETE)
 549
 550 /* Declare abort, exit, _exit and _Exit */
 551 DEF_BUILTIN (BUILT_IN_ABORT,
 552              "__builtin_abort",
 553              NOT_BUILT_IN,
 554              BT_FN_VOID,
 555              BT_FN_VOID,
 556              1, 0, 0,
 557              ATTR_NORETURN_NOTHROW_LIST)
 558
 559 DEF_BUILTIN (BUILT_IN_EXIT,
 560              "__builtin_exit",
 561              NOT_BUILT_IN,
 562              BT_FN_VOID_INT,
 563              BT_FN_VOID_INT,
 564              1, 0, 0,
 565              ATTR_NORETURN_NOTHROW_LIST)
 566
 567 DEF_BUILTIN (BUILT_IN__EXIT,
 568              "__builtin__exit",
 569              NOT_BUILT_IN,
 570              BT_FN_VOID_INT,
 571              BT_FN_VOID_INT,
 572              1, 0, 1,
 573              ATTR_NORETURN_NOTHROW_LIST)
 574
 575 DEF_BUILTIN (BUILT_IN__EXIT2,
 576              "__builtin__Exit",
 577              NOT_BUILT_IN,
 578              BT_FN_VOID_INT,
 579              BT_FN_VOID_INT,
 580              1, 0, !flag_isoc99,
 581              ATTR_NORETURN_NOTHROW_LIST)
 582