check_gcctorture_pr28634.c (377B)
1/* PR rtl-optimization/28634. On targets with delayed branches, 2 dbr_schedule could do the next iteration's addition in the 3 branch delay slot, then subtract the value again if the branch 4 wasn't taken. This can lead to rounding errors. */ 5double x = -0x1.0p53; 6double y = 1; 7int 8main (void) 9{ 10 while (y > 0) 11 y += x; 12 if (y != x + 1) 13 abort (); 14 exit (0); 15}