gcc/internal-fn.def

   1 /* Internal functions.
   2    Copyright (C) 2011-2018 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 /* This file specifies a list of internal "functions".  These functions
  21    differ from built-in functions in that they have no linkage and cannot
  22    be called directly by the user.  They represent operations that are only
  23    synthesised by GCC itself.
  24
  25    Internal functions are used instead of tree codes if the operation
  26    and its operands are more naturally represented as a GIMPLE_CALL
  27    than a GIMPLE_ASSIGN.
  28
  29    Each entry in this file has one of the forms:
  30
  31      DEF_INTERNAL_FN (NAME, FLAGS, FNSPEC)
  32      DEF_INTERNAL_OPTAB_FN (NAME, FLAGS, OPTAB, TYPE)
  33      DEF_INTERNAL_SIGNED_OPTAB_FN (NAME, FLAGS, SELECTOR, SIGNED_OPTAB,
  34                                    UNSIGNED_OPTAB, TYPE)
  35      DEF_INTERNAL_FLT_FN (NAME, FLAGS, OPTAB, TYPE)
  36      DEF_INTERNAL_INT_FN (NAME, FLAGS, OPTAB, TYPE)
  37
  38    where NAME is the name of the function, FLAGS is a set of
  39    ECF_* flags and FNSPEC is a string describing functions fnspec.
  40
  41    DEF_INTERNAL_OPTAB_FN defines an internal function that maps to a
  42    direct optab.  The function should only be called with a given
  43    set of types if the associated optab is available for the modes
  44    of those types.  OPTAB says what optab to use (without the trailing
  45    "_optab") and TYPE categorizes the optab based on its inputs and
  46    outputs.  The possible types of optab are:
  47
  48    - mask_load: currently just maskload
  49    - load_lanes: currently just vec_load_lanes
  50    - mask_load_lanes: currently just vec_mask_load_lanes
  51    - gather_load: used for {mask_,}gather_load
  52
  53    - mask_store: currently just maskstore
  54    - store_lanes: currently just vec_store_lanes
  55    - mask_store_lanes: currently just vec_mask_store_lanes
  56    - scatter_store: used for {mask_,}scatter_store
  57
  58    - unary: a normal unary optab, such as vec_reverse_<mode>
  59    - binary: a normal binary optab, such as vec_interleave_lo_<mode>
  60    - ternary: a normal ternary optab, such as fma<mode>4
  61
  62    - cond_binary: a conditional binary optab, such as add<mode>cc
  63
  64    - fold_left: for scalar = FN (scalar, vector), keyed off the vector mode
  65
  66    DEF_INTERNAL_SIGNED_OPTAB_FN defines an internal function that
  67    maps to one of two optabs, depending on the signedness of an input.
  68    SIGNED_OPTAB and UNSIGNED_OPTAB are the optabs for signed and
  69    unsigned inputs respectively, both without the trailing "_optab".
  70    SELECTOR says which type in the tree_pair determines the signedness.
  71
  72    DEF_INTERNAL_FLT_FN is like DEF_INTERNAL_OPTAB_FN, but in addition,
  73    the function implements the computational part of a built-in math
  74    function BUILT_IN_<NAME>{F,,L}.  Unlike some built-in functions,
  75    these internal functions never set errno.
  76
  77    DEF_INTERNAL_INT_FN is like DEF_INTERNAL_OPTAB_FN, but in addition
  78    says that the function extends the C-level BUILT_IN_<NAME>{,L,LL,IMAX}
  79    group of functions to any integral mode (including vector modes).
  80
  81    Each entry must have a corresponding expander of the form:
  82
  83      void expand_NAME (gimple_call stmt)
  84
  85    where STMT is the statement that performs the call.  These are generated
  86    automatically for optab functions and call out to a function or macro
  87    called expand_<TYPE>_optab_fn.  */
  88
  89 #ifndef DEF_INTERNAL_FN
  90 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC)
  91 #endif
  92
  93 #ifndef DEF_INTERNAL_OPTAB_FN
  94 #define DEF_INTERNAL_OPTAB_FN(NAME, FLAGS, OPTAB, TYPE) \
  95   DEF_INTERNAL_FN (NAME, FLAGS | ECF_LEAF, NULL)
  96 #endif
  97
  98 #ifndef DEF_INTERNAL_SIGNED_OPTAB_FN
  99 #define DEF_INTERNAL_SIGNED_OPTAB_FN(NAME, FLAGS, SELECTOR, SIGNED_OPTAB, \
 100                                      UNSIGNED_OPTAB, TYPE) \
 101   DEF_INTERNAL_FN (NAME, FLAGS | ECF_LEAF, NULL)
 102 #endif
 103
 104 #ifndef DEF_INTERNAL_FLT_FN
 105 #define DEF_INTERNAL_FLT_FN(NAME, FLAGS, OPTAB, TYPE) \
 106   DEF_INTERNAL_OPTAB_FN (NAME, FLAGS, OPTAB, TYPE)
 107 #endif
 108
 109 #ifndef DEF_INTERNAL_FLT_FLOATN_FN
 110 #define DEF_INTERNAL_FLT_FLOATN_FN(NAME, FLAGS, OPTAB, TYPE) \
 111   DEF_INTERNAL_FLT_FN (NAME, FLAGS, OPTAB, TYPE)
 112 #endif
 113
 114 #ifndef DEF_INTERNAL_INT_FN
 115 #define DEF_INTERNAL_INT_FN(NAME, FLAGS, OPTAB, TYPE) \
 116   DEF_INTERNAL_OPTAB_FN (NAME, FLAGS, OPTAB, TYPE)
 117 #endif
 118
 119 DEF_INTERNAL_OPTAB_FN (MASK_LOAD, ECF_PURE, maskload, mask_load)
 120 DEF_INTERNAL_OPTAB_FN (LOAD_LANES, ECF_CONST, vec_load_lanes, load_lanes)
 121 DEF_INTERNAL_OPTAB_FN (MASK_LOAD_LANES, ECF_PURE,
 122                        vec_mask_load_lanes, mask_load_lanes)
 123
 124 DEF_INTERNAL_OPTAB_FN (GATHER_LOAD, ECF_PURE, gather_load, gather_load)
 125 DEF_INTERNAL_OPTAB_FN (MASK_GATHER_LOAD, ECF_PURE,
 126                        mask_gather_load, gather_load)
 127
 128 DEF_INTERNAL_OPTAB_FN (SCATTER_STORE, 0, scatter_store, scatter_store)
 129 DEF_INTERNAL_OPTAB_FN (MASK_SCATTER_STORE, 0,
 130                        mask_scatter_store, scatter_store)
 131
 132 DEF_INTERNAL_OPTAB_FN (MASK_STORE, 0, maskstore, mask_store)
 133 DEF_INTERNAL_OPTAB_FN (STORE_LANES, ECF_CONST, vec_store_lanes, store_lanes)
 134 DEF_INTERNAL_OPTAB_FN (MASK_STORE_LANES, 0,
 135                        vec_mask_store_lanes, mask_store_lanes)
 136
 137 DEF_INTERNAL_OPTAB_FN (WHILE_ULT, ECF_CONST | ECF_NOTHROW, while_ult, while)
 138
 139 DEF_INTERNAL_OPTAB_FN (VEC_SHL_INSERT, ECF_CONST | ECF_NOTHROW,
 140                        vec_shl_insert, binary)
 141
 142 DEF_INTERNAL_OPTAB_FN (FMS, ECF_CONST, fms, ternary)
 143 DEF_INTERNAL_OPTAB_FN (FNMA, ECF_CONST, fnma, ternary)
 144 DEF_INTERNAL_OPTAB_FN (FNMS, ECF_CONST, fnms, ternary)
 145
 146 DEF_INTERNAL_SIGNED_OPTAB_FN (AVG_FLOOR, ECF_CONST | ECF_NOTHROW, first,
 147                               savg_floor, uavg_floor, binary)
 148 DEF_INTERNAL_SIGNED_OPTAB_FN (AVG_CEIL, ECF_CONST | ECF_NOTHROW, first,
 149                               savg_ceil, uavg_ceil, binary)
 150
 151 DEF_INTERNAL_OPTAB_FN (COND_ADD, ECF_CONST, cond_add, cond_binary)
 152 DEF_INTERNAL_OPTAB_FN (COND_SUB, ECF_CONST, cond_sub, cond_binary)
 153 DEF_INTERNAL_OPTAB_FN (COND_MUL, ECF_CONST, cond_smul, cond_binary)
 154 DEF_INTERNAL_SIGNED_OPTAB_FN (COND_DIV, ECF_CONST, first,
 155                               cond_sdiv, cond_udiv, cond_binary)
 156 DEF_INTERNAL_SIGNED_OPTAB_FN (COND_MOD, ECF_CONST, first,
 157                               cond_smod, cond_umod, cond_binary)
 158 DEF_INTERNAL_OPTAB_FN (COND_RDIV, ECF_CONST, cond_sdiv, cond_binary)
 159 DEF_INTERNAL_SIGNED_OPTAB_FN (COND_MIN, ECF_CONST, first,
 160                               cond_smin, cond_umin, cond_binary)
 161 DEF_INTERNAL_SIGNED_OPTAB_FN (COND_MAX, ECF_CONST, first,
 162                               cond_smax, cond_umax, cond_binary)
 163 DEF_INTERNAL_OPTAB_FN (COND_AND, ECF_CONST | ECF_NOTHROW,
 164                        cond_and, cond_binary)
 165 DEF_INTERNAL_OPTAB_FN (COND_IOR, ECF_CONST | ECF_NOTHROW,
 166                        cond_ior, cond_binary)
 167 DEF_INTERNAL_OPTAB_FN (COND_XOR, ECF_CONST | ECF_NOTHROW,
 168                        cond_xor, cond_binary)
 169
 170 DEF_INTERNAL_OPTAB_FN (RSQRT, ECF_CONST, rsqrt, unary)
 171
 172 DEF_INTERNAL_OPTAB_FN (REDUC_PLUS, ECF_CONST | ECF_NOTHROW,
 173                        reduc_plus_scal, unary)
 174 DEF_INTERNAL_SIGNED_OPTAB_FN (REDUC_MAX, ECF_CONST | ECF_NOTHROW, first,
 175                               reduc_smax_scal, reduc_umax_scal, unary)
 176 DEF_INTERNAL_SIGNED_OPTAB_FN (REDUC_MIN, ECF_CONST | ECF_NOTHROW, first,
 177                               reduc_smin_scal, reduc_umin_scal, unary)
 178 DEF_INTERNAL_OPTAB_FN (REDUC_AND, ECF_CONST | ECF_NOTHROW,
 179                        reduc_and_scal, unary)
 180 DEF_INTERNAL_OPTAB_FN (REDUC_IOR, ECF_CONST | ECF_NOTHROW,
 181                        reduc_ior_scal, unary)
 182 DEF_INTERNAL_OPTAB_FN (REDUC_XOR, ECF_CONST | ECF_NOTHROW,
 183                        reduc_xor_scal, unary)
 184
 185 /* Extract the last active element from a vector.  */
 186 DEF_INTERNAL_OPTAB_FN (EXTRACT_LAST, ECF_CONST | ECF_NOTHROW,
 187                        extract_last, fold_left)
 188
 189 /* Same, but return the first argument if no elements are active.  */
 190 DEF_INTERNAL_OPTAB_FN (FOLD_EXTRACT_LAST, ECF_CONST | ECF_NOTHROW,
 191                        fold_extract_last, fold_extract)
 192
 193 DEF_INTERNAL_OPTAB_FN (FOLD_LEFT_PLUS, ECF_CONST | ECF_NOTHROW,
 194                        fold_left_plus, fold_left)
 195
 196 /* Unary math functions.  */
 197 DEF_INTERNAL_FLT_FN (ACOS, ECF_CONST, acos, unary)
 198 DEF_INTERNAL_FLT_FN (ASIN, ECF_CONST, asin, unary)
 199 DEF_INTERNAL_FLT_FN (ATAN, ECF_CONST, atan, unary)
 200 DEF_INTERNAL_FLT_FN (COS, ECF_CONST, cos, unary)
 201 DEF_INTERNAL_FLT_FN (EXP, ECF_CONST, exp, unary)
 202 DEF_INTERNAL_FLT_FN (EXP10, ECF_CONST, exp10, unary)
 203 DEF_INTERNAL_FLT_FN (EXP2, ECF_CONST, exp2, unary)
 204 DEF_INTERNAL_FLT_FN (EXPM1, ECF_CONST, expm1, unary)
 205 DEF_INTERNAL_FLT_FN (LOG, ECF_CONST, log, unary)
 206 DEF_INTERNAL_FLT_FN (LOG10, ECF_CONST, log10, unary)
 207 DEF_INTERNAL_FLT_FN (LOG1P, ECF_CONST, log1p, unary)
 208 DEF_INTERNAL_FLT_FN (LOG2, ECF_CONST, log2, unary)
 209 DEF_INTERNAL_FLT_FN (LOGB, ECF_CONST, logb, unary)
 210 DEF_INTERNAL_FLT_FN (SIGNIFICAND, ECF_CONST, significand, unary)
 211 DEF_INTERNAL_FLT_FN (SIN, ECF_CONST, sin, unary)
 212 DEF_INTERNAL_FLT_FLOATN_FN (SQRT, ECF_CONST, sqrt, unary)
 213 DEF_INTERNAL_FLT_FN (TAN, ECF_CONST, tan, unary)
 214
 215 /* FP rounding.  */
 216 DEF_INTERNAL_FLT_FLOATN_FN (CEIL, ECF_CONST, ceil, unary)
 217 DEF_INTERNAL_FLT_FLOATN_FN (FLOOR, ECF_CONST, floor, unary)
 218 DEF_INTERNAL_FLT_FLOATN_FN (NEARBYINT, ECF_CONST, nearbyint, unary)
 219 DEF_INTERNAL_FLT_FLOATN_FN (RINT, ECF_CONST, rint, unary)
 220 DEF_INTERNAL_FLT_FLOATN_FN (ROUND, ECF_CONST, round, unary)
 221 DEF_INTERNAL_FLT_FLOATN_FN (TRUNC, ECF_CONST, btrunc, unary)
 222
 223 /* Binary math functions.  */
 224 DEF_INTERNAL_FLT_FN (ATAN2, ECF_CONST, atan2, binary)
 225 DEF_INTERNAL_FLT_FLOATN_FN (COPYSIGN, ECF_CONST, copysign, binary)
 226 DEF_INTERNAL_FLT_FN (FMOD, ECF_CONST, fmod, binary)
 227 DEF_INTERNAL_FLT_FN (POW, ECF_CONST, pow, binary)
 228 DEF_INTERNAL_FLT_FN (REMAINDER, ECF_CONST, remainder, binary)
 229 DEF_INTERNAL_FLT_FN (SCALB, ECF_CONST, scalb, binary)
 230 DEF_INTERNAL_FLT_FLOATN_FN (FMIN, ECF_CONST, fmin, binary)
 231 DEF_INTERNAL_FLT_FLOATN_FN (FMAX, ECF_CONST, fmax, binary)
 232 DEF_INTERNAL_OPTAB_FN (XORSIGN, ECF_CONST, xorsign, binary)
 233
 234 /* FP scales.  */
 235 DEF_INTERNAL_FLT_FN (LDEXP, ECF_CONST, ldexp, binary)
 236
 237 /* Ternary math functions.  */
 238 DEF_INTERNAL_FLT_FN (FMA, ECF_CONST, fma, ternary)
 239
 240 /* Unary integer ops.  */
 241 DEF_INTERNAL_INT_FN (CLRSB, ECF_CONST | ECF_NOTHROW, clrsb, unary)
 242 DEF_INTERNAL_INT_FN (CLZ, ECF_CONST | ECF_NOTHROW, clz, unary)
 243 DEF_INTERNAL_INT_FN (CTZ, ECF_CONST | ECF_NOTHROW, ctz, unary)
 244 DEF_INTERNAL_INT_FN (FFS, ECF_CONST | ECF_NOTHROW, ffs, unary)
 245 DEF_INTERNAL_INT_FN (PARITY, ECF_CONST | ECF_NOTHROW, parity, unary)
 246 DEF_INTERNAL_INT_FN (POPCOUNT, ECF_CONST | ECF_NOTHROW, popcount, unary)
 247
 248 DEF_INTERNAL_FN (GOMP_USE_SIMT, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 249 DEF_INTERNAL_FN (GOMP_SIMT_ENTER, ECF_LEAF | ECF_NOTHROW, NULL)
 250 DEF_INTERNAL_FN (GOMP_SIMT_ENTER_ALLOC, ECF_LEAF | ECF_NOTHROW, NULL)
 251 DEF_INTERNAL_FN (GOMP_SIMT_EXIT, ECF_LEAF | ECF_NOTHROW, NULL)
 252 DEF_INTERNAL_FN (GOMP_SIMT_LANE, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 253 DEF_INTERNAL_FN (GOMP_SIMT_VF, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 254 DEF_INTERNAL_FN (GOMP_SIMT_LAST_LANE, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 255 DEF_INTERNAL_FN (GOMP_SIMT_ORDERED_PRED, ECF_LEAF | ECF_NOTHROW, NULL)
 256 DEF_INTERNAL_FN (GOMP_SIMT_VOTE_ANY, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 257 DEF_INTERNAL_FN (GOMP_SIMT_XCHG_BFLY, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 258 DEF_INTERNAL_FN (GOMP_SIMT_XCHG_IDX, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 259 DEF_INTERNAL_FN (GOMP_SIMD_LANE, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 260 DEF_INTERNAL_FN (GOMP_SIMD_VF, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 261 DEF_INTERNAL_FN (GOMP_SIMD_LAST_LANE, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 262 DEF_INTERNAL_FN (GOMP_SIMD_ORDERED_START, ECF_LEAF | ECF_NOTHROW, NULL)
 263 DEF_INTERNAL_FN (GOMP_SIMD_ORDERED_END, ECF_LEAF | ECF_NOTHROW, NULL)
 264 DEF_INTERNAL_FN (LOOP_VECTORIZED, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 265 DEF_INTERNAL_FN (LOOP_DIST_ALIAS, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 266 DEF_INTERNAL_FN (ANNOTATE,  ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 267 DEF_INTERNAL_FN (UBSAN_NULL, ECF_LEAF | ECF_NOTHROW, ".R.")
 268 DEF_INTERNAL_FN (UBSAN_BOUNDS, ECF_LEAF | ECF_NOTHROW, NULL)
 269 DEF_INTERNAL_FN (UBSAN_VPTR, ECF_LEAF | ECF_NOTHROW, ".RR..")
 270 DEF_INTERNAL_FN (UBSAN_CHECK_ADD, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 271 DEF_INTERNAL_FN (UBSAN_CHECK_SUB, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 272 DEF_INTERNAL_FN (UBSAN_CHECK_MUL, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 273 DEF_INTERNAL_FN (UBSAN_PTR, ECF_LEAF | ECF_NOTHROW, ".R.")
 274 DEF_INTERNAL_FN (UBSAN_OBJECT_SIZE, ECF_LEAF | ECF_NOTHROW, NULL)
 275 DEF_INTERNAL_FN (ABNORMAL_DISPATCHER, ECF_NORETURN, NULL)
 276 DEF_INTERNAL_FN (BUILTIN_EXPECT, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 277 DEF_INTERNAL_FN (ASAN_CHECK, ECF_TM_PURE | ECF_LEAF | ECF_NOTHROW, "..R..")
 278 DEF_INTERNAL_FN (ASAN_MARK, ECF_LEAF | ECF_NOTHROW, NULL)
 279 DEF_INTERNAL_FN (ASAN_POISON, ECF_LEAF | ECF_NOTHROW | ECF_NOVOPS, NULL)
 280 DEF_INTERNAL_FN (ASAN_POISON_USE, ECF_LEAF | ECF_NOTHROW | ECF_NOVOPS, NULL)
 281 DEF_INTERNAL_FN (ADD_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 282 DEF_INTERNAL_FN (SUB_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 283 DEF_INTERNAL_FN (MUL_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 284 DEF_INTERNAL_FN (TSAN_FUNC_EXIT, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 285 DEF_INTERNAL_FN (VA_ARG, ECF_NOTHROW | ECF_LEAF, NULL)
 286
 287 /* An unduplicable, uncombinable function.  Generally used to preserve
 288    a CFG property in the face of jump threading, tail merging or
 289    other such optimizations.  The first argument distinguishes
 290    between uses.  See internal-fn.h for usage.  */
 291 DEF_INTERNAL_FN (UNIQUE, ECF_NOTHROW, NULL)
 292 DEF_INTERNAL_FN (PHI, 0, NULL)
 293
 294 /* DIM_SIZE and DIM_POS return the size of a particular compute
 295    dimension and the executing thread's position within that
 296    dimension.  DIM_POS is pure (and not const) so that it isn't
 297    thought to clobber memory and can be gcse'd within a single
 298    parallel region, but not across FORK/JOIN boundaries.  They take a
 299    single INTEGER_CST argument.  This might be overly conservative.  */
 300 DEF_INTERNAL_FN (GOACC_DIM_SIZE, ECF_CONST | ECF_NOTHROW | ECF_LEAF, ".")
 301 DEF_INTERNAL_FN (GOACC_DIM_POS, ECF_PURE | ECF_NOTHROW | ECF_LEAF, ".")
 302
 303 /* OpenACC looping abstraction.  See internal-fn.h for usage.  */
 304 DEF_INTERNAL_FN (GOACC_LOOP, ECF_PURE | ECF_NOTHROW, NULL)
 305
 306 /* OpenACC reduction abstraction.  See internal-fn.h  for usage.  */
 307 DEF_INTERNAL_FN (GOACC_REDUCTION, ECF_NOTHROW | ECF_LEAF, NULL)
 308
 309 /* Openacc tile abstraction. Describes the spans of the element loop.
 310    GOACC_TILE (num-loops, loop-no, tile-arg, tile-mask, element-mask).  */
 311 DEF_INTERNAL_FN (GOACC_TILE, ECF_NOTHROW | ECF_LEAF, NULL)
 312
 313 /* Set errno to EDOM, if GCC knows how to do that directly for the
 314    current target.  */
 315 DEF_INTERNAL_FN (SET_EDOM, ECF_LEAF | ECF_NOTHROW, NULL)
 316
 317 /* Atomic functions.  These don't have ECF_NOTHROW because for
 318    -fnon-call-exceptions they can throw, otherwise we set
 319    gimple_call_nothrow_p on it.  */
 320 DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_SET, ECF_LEAF, NULL)
 321 DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_COMPLEMENT, ECF_LEAF, NULL)
 322 DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_RESET, ECF_LEAF, NULL)
 323 DEF_INTERNAL_FN (ATOMIC_COMPARE_EXCHANGE, ECF_LEAF, NULL)
 324
 325 /* To implement [[fallthrough]].  */
 326 DEF_INTERNAL_FN (FALLTHROUGH, ECF_LEAF | ECF_NOTHROW, NULL)
 327
 328 /* To implement __builtin_launder.  */
 329 DEF_INTERNAL_FN (LAUNDER, ECF_LEAF | ECF_NOTHROW | ECF_NOVOPS, NULL)
 330
 331 /* Divmod function.  */
 332 DEF_INTERNAL_FN (DIVMOD, ECF_CONST | ECF_LEAF, NULL)
 333
 334 /* A NOP function with arbitrary arguments and return value.  */
 335 DEF_INTERNAL_FN (NOP, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 336
 337 #undef DEF_INTERNAL_INT_FN
 338 #undef DEF_INTERNAL_FLT_FN
 339 #undef DEF_INTERNAL_FLT_FLOATN_FN
 340 #undef DEF_INTERNAL_SIGNED_OPTAB_FN
 341 #undef DEF_INTERNAL_OPTAB_FN
 342 #undef DEF_INTERNAL_FN