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/* { dg-do compile } */
 
#define N 320
#define M 1024
signed short in[N+M];
signed short coeff[M];
int out[N];
 
/* Outer-loop vectorization.  */
 
void
foo (){
  int i,j;
  int diff;
 
  for (i = 0; i < N; i++) {
    diff = 0;
    for (j = 0; j < M; j+=8) {
      diff += in[j+i]*coeff[j];
    }
    out[i]=diff;
  }
}
 
/* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" { target vect_widen_mult_hi_to_si } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */