| /* A test for strength reduction and induction variable elimination. */ |
| |
| /* { dg-do compile } */ |
| /* { dg-options "-O1 -fdump-tree-optimized" } */ |
| /* { dg-require-effective-target size32plus } */ |
| |
| /* Size of this structure should be sufficiently weird so that no memory |
| addressing mode applies. */ |
| |
| struct bla |
| { |
| char x[187]; |
| int y; |
| char z[253]; |
| } arr_base[100]; |
| |
| void xxx(void) |
| { |
| int iter; |
| |
| for (iter = 0; iter < 100; iter++) |
| arr_base[iter].y = 17 * iter; |
| } |
| |
| /* Access to arr_base[iter].y should be strength reduced, i.e., there should |
| be no multiplication. */ |
| |
| /* { dg-final { scan-tree-dump-times " \\* \[^\\n\\r\]*=" 0 "optimized" } } */ |
| /* { dg-final { scan-tree-dump-times "\[^\\n\\r\]*= \\* " 0 "optimized" } } */ |
| |
| /* 17 * iter should be strength reduced. */ |
| |
| /* { dg-final { scan-tree-dump-times " \\* 17" 0 "optimized" } } */ |
| /* { dg-final { scan-tree-dump-times " \\+ 17" 1 "optimized" } } */ |
| |
| /* The induction variable comparison with 99 should be eliminated |
| and replaced by comparison of one of the newly created ivs. */ |
| |
| /* { dg-final { scan-tree-dump-times "iter" 0 "optimized" } } */ |
| /* { dg-final { scan-tree-dump-times "= 99" 0 "optimized" } } */ |
| /* { dg-final { scan-tree-dump-times "< 100" 0 "optimized" } } */ |
| |
