gcc/testsuite/gcc.dg/pr28726.c

   1 /* PR rtl-optimization/28726 */
   2 /* Origin: Sigurd Schneider <sg313d@gmail.com> */
   3
   4 /* { dg-do run } */
   5 /* { dg-options "-O2 -fsched2-use-superblocks" } */
   6
   7 extern void abort (void);
   8
   9 static double my_loop(void) __attribute__((noinline));
  10
  11 static double my_loop(void)
  12 {
  13   double retval = 0.0;
  14   const unsigned char *start = "\005\b\000";
  15   const unsigned char *const end = start + 2;
  16
  17   while (start < end)
  18     retval += *start++;
  19
  20   return retval;
  21 }
  22
  23 int main(void)
  24 {
  25   if (my_loop() != 13.0)
  26     abort ();
  27
  28   return 0;
  29 }