1  /* { dg-require-effective-target vect_int } */
       2  
       3  #include <stdarg.h>
       4  #include "tree-vect.h"
       5  
       6  #define N 64
       7  
       8  #define DOT1 43680
       9  #define DOT2 43680
      10  
      11  unsigned short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
      12  unsigned short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
      13  
      14  /* short->short->int dot product. 
      15     Not detected as a dot-product pattern.
      16     Requires support for non-widneing multiplication and widening-summation.  */
      17  __attribute__ ((noinline)) unsigned int
      18  foo1(int len) {
      19    int i;
      20    unsigned int result = 0;
      21    unsigned short prod;
      22  
      23    for (i=0; i<len; i++) {
      24      prod = X[i] * Y[i];
      25      result += prod;
      26    }
      27    return result;
      28  }
      29  
      30  int main (void)
      31  {
      32    unsigned int dot1;
      33    unsigned short i;
      34  
      35    check_vect ();
      36  
      37    for (i=0; i<N; i++) {
      38      X[i] = i;
      39      Y[i] = 64-i;
      40    }
      41  
      42    dot1 = foo1 (N);
      43    if (dot1 != DOT1)
      44      abort ();
      45  
      46    return 0;
      47  }
      48  
      49  /* The initialization loop in main also gets vectorized.  */
      50  /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" { xfail *-*-* } } } */
      51  /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target { vect_short_mult && vect_widen_sum_hi_to_si } } } } */