gcc/testsuite/gcc.dg/pr82004.c

   1 /* PR tree-optimization/82004 */
   2 /* { dg-do run } */
   3 /* { dg-options "-Ofast" } */
   4
   5 extern double log10 (double);
   6 extern double pow (double, double);
   7
   8 __attribute__((noipa)) void
   9 bar (double x)
  10 {
  11   if (x < 0.001)
  12     __builtin_abort ();
  13   asm volatile ("" : : : "memory");
  14 }
  15
  16 int
  17 main ()
  18 {
  19   double d = 0.001;
  20   double e = 10.0;
  21   double f = (log10 (e) - log10 (d)) / 400.0;
  22   double g = log10 (d) - f;
  23   volatile int q = 0;
  24   int i;
  25   if (__builtin_expect (q == 0, 0))
  26     for (i = 0; i < 400; ++i)
  27       {
  28         g = g + f;
  29         bar (pow (10.0, g));
  30       }
  31   return 0;
  32 }