gcc/testsuite/gcc.dg/fold-isnan-1.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target inf } */
   3 /* { dg-options "-O2 -fdump-tree-optimized" } */
   4
   5 int foo(int x)
   6 {
   7   return __builtin_isnan((double)x);
   8 }
   9
  10 int foof(int x)
  11 {
  12   return __builtin_isnanf((float)x);
  13 }
  14
  15 int fool(int x)
  16 {
  17   return __builtin_isnanl((long double)x);
  18 }
  19
  20 /* { dg-final { scan-tree-dump-times "_isnan" 0 "optimized" } } */
  21 /* { dg-final { scan-tree-dump-times " unord " 0 "optimized" } } */