/* Verify straight-line strength reduction for multiply candidates | |
with variable stride and control flow, increment = -1. */ | |
/* { dg-do compile } */ | |
/* { dg-options "-O3 -fdump-tree-optimized" } */ | |
int | |
f (int n, int x, int stride) | |
{ | |
int a, x1, x2, x3; | |
a = x * stride; | |
if (n > 64) | |
{ | |
x1 = x - 1; | |
a += x1 * stride; | |
x2 = x1 - 1; | |
a += x2 * stride; | |
} | |
else | |
{ | |
x3 = x - 1; | |
a += x3 * stride; | |
} | |
return a; | |
} | |
/* { dg-final { scan-tree-dump-times " \\* " 1 "optimized" } } */ |