gcc/testsuite/gcc.dg/pr54919.c

   1 /* PR tree-optimization/54919 */
   2 /* Testcase by Zdenek Sojka <zsojka@seznam.cz> */
   3
   4 /* { dg-do run } */
   5 /* { dg-options "-O3 -ffast-math -funroll-loops -fvariable-expansion-in-unroller" } */
   6
   7 int a[10];
   8 extern void abort(void) __attribute__((noreturn));
   9
  10 int __attribute__((__noinline__, __noclone__))
  11 foo (void)
  12 {
  13   double d;
  14   int i;
  15   for (i = 0, d = 0; i < 64; i++)
  16     d--;
  17   return (int) d;
  18 }
  19
  20 int
  21 main (void)
  22 {
  23   if (foo () != -64)
  24     abort ();
  25   return 0;
  26 }
  27