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/* { dg-do compile } */
/* { dg-options "-O -fdump-tree-optimized" } */

int a[4];
int *x, *y, *z;

void foo(void)
{
        x = &a[3] - 1;
        y = &a[1] + 1;
        z = 1 + &a[1];
}

void bar(int i)
{
        x = &a[i] - 1;
        y = &a[i] + 1;
        z = 1 + &a[i];
}

/* { dg-final { scan-tree-dump-times "&a\\\[2\\\]" 3 "optimized" } } */
/* { dg-final { scan-tree-dump-times "&a\\\[.* - 1\\\]" 1 "optimized" } } */
/* { dg-final { scan-tree-dump-times "&a\\\[.* \\+ 1\\\]" 1 "optimized" } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */