1  /* { dg-require-effective-target vect_float } */
       2  
       3  #include <stdarg.h>
       4  #include "tree-vect.h"
       5  
       6  #define N 40
       7  #define M 128
       8  float in[N+M];
       9  float coeff[M];
      10  float out[N];
      11  
      12  /* Outer-loop vectorization.  */
      13  
      14  __attribute__ ((noinline)) void
      15  foo (){
      16    int i,j;
      17    float diff;
      18  
      19    for (i = 0; i < N; i++) {
      20      diff = 0;
      21      for (j = 0; j < M; j+=4) {
      22        diff += in[j+i]*coeff[j]; 
      23      }
      24      out[i]=diff;
      25    }
      26  }
      27  
      28  int main (void)
      29  {
      30    check_vect ();
      31    int i, j;
      32    float diff;
      33  
      34    for (i = 0; i < M; i++)
      35      coeff[i] = i;
      36    for (i = 0; i < N+M; i++)
      37      in[i] = i;
      38  
      39    foo ();
      40    
      41    for (i = 0; i < N; i++) {
      42      diff = 0;
      43      for (j = 0; j < M; j+=4) {
      44        diff += in[j+i]*coeff[j];
      45      }
      46      if (out[i] != diff)
      47        abort ();
      48    }
      49  
      50    return 0;
      51  }
      52  
      53  /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" } } */
      54  /* { dg-final { scan-tree-dump-times "zero step in outer loop." 1 "vect" } } */