gcc/testsuite/gcc.dg/vect/vect-outer-4b.c

   1 /* { dg-do compile } */
   2
   3 #define N 40
   4 #define M 128
   5 signed short in[N+M];
   6 signed short coeff[M];
   7 int out[N];
   8
   9 /* Outer-loop vectorization. */
  10
  11 void
  12 foo (){
  13   int i,j;
  14   int diff;
  15
  16   for (i = 0; i < N; i++) {
  17     diff = 0;
  18     for (j = 0; j < M; j+=8) {
  19       diff += in[j+i]*coeff[j];
  20     }
  21     out[i]=diff;
  22   }
  23 }
  24
  25 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" { target vect_widen_mult_hi_to_si } } } */