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/* { dg-do compile } */
/* { dg-require-effective-target vect_int } */
 
void f(unsigned char *s, unsigned char *d, int n) {
    int i;
    for (i = 0; i < n; i += 4) {
        d[i + 0] += s[i + 0];
        d[i + 1] += s[i + 1];
        d[i + 2] += s[i + 2];
        d[i + 3] += s[i + 3];
    }
}
 
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" {xfail vect_no_align } } } */
/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" {xfail vect_no_align } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */