| /* Verify straight-line strength reduction for add candidates in |
| which the stride is unknown and increments appear that differ |
| only in sign. Verify the increments are shared. */ |
| |
| /* { dg-do compile } */ |
| /* { dg-options "-O3 -fdump-tree-optimized" } */ |
| |
| int |
| f (int s, int c) |
| { |
| int a1, a2, a3, a4, x1, x2, x3, x4, x; |
| |
| a1 = 2 * s; |
| x1 = c + a1; |
| a2 = 4 * s; /* incr = +2 */ |
| x2 = c + a2; |
| a3 = 7 * s; |
| x3 = c + a3; |
| a4 = 5 * s; /* incr = -2 */ |
| x4 = c + a4; |
| x = x1 + x2 + x3 + x4; |
| return x; |
| } |
| |
| /* { dg-final { scan-tree-dump-times " \\* 2" 1 "optimized" } } */ |
| /* { dg-final { scan-tree-dump-times " \\* -2" 0 "optimized" } } */ |
