/* A test for strength reduction and induction variable elimination. */ /* { dg-do compile } */ /* { dg-options "-O1 -fdump-tree-vars" } */ /* 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. */ /* { dg-final { scan-tree-dump-times "arr_base\[^\\n\\r\]*=" 0 "vars" } } */ /* 17 * iter should be strength reduced. */ /* { dg-final { scan-tree-dump-times " \\* 17" 0 "vars" } } */ /* { dg-final { scan-tree-dump-times " \\+ 17" 1 "vars" } } */ /* The induction variable comparison with 99 should be eliminated and replaced by comparison of the variable for 17 * iter with 1700. */ /* { dg-final { scan-tree-dump-times "1700" 1 "vars" } } */ /* { dg-final { scan-tree-dump-times "iter" 0 "vars" } } */