gcc/testsuite/gcc.dg/pr36017.c

   1 /* PR rtl-optimization/36017 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2" } */
   4
   5 #if defined (__AVR__) && (__SIZEOF_DOUBLE__ == __SIZEOF_FLOAT__)
   6 extern double sqrt (double) __asm ("sqrtf");
   7 #else
   8 extern double sqrt (double);
   9 #endif
  10 extern void abort (void);
  11
  12 __attribute__((noinline)) double
  13 foo (double a)
  14 {
  15   double b, c, d = 0.7;
  16   if (a <= d)
  17     b = sqrt (d * a);
  18   else
  19     {
  20       c = (1.0 - d) * (1.0 - a);
  21       b = c > 0 ? 1.0 - sqrt (c) : 1.0;
  22     }
  23   return b;
  24 }
  25
  26 int
  27 main (void)
  28 {
  29   double c = foo (0.5);
  30   if (c > 0.5917)
  31     abort ();
  32   return 0;
  33 }