1  /* Disabling epilogues until we find a better way to deal with scans.  */
       2  /* { dg-additional-options "--param vect-epilogues-nomask=0" } */
       3  /* { dg-require-effective-target vect_int } */
       4  
       5  #include <stdarg.h>
       6  #include "tree-vect.h"
       7  
       8  #define N 64
       9  
      10  #define DOT -21856
      11  
      12  signed char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63};
      13  signed char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {64,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1};
      14  
      15  /* char->short->short dot product.
      16     The dot-product pattern should be detected.
      17     Should be vectorized on vect_sdot_qi targets (targets that support 
      18     dot-product of signed char).  
      19     This test currently fails to vectorize on targets that support
      20     dot-product of chars into and int accumulator.
      21     Can also be vectorized as widening-mult + summation,
      22     or with type-conversion support.
      23   */
      24  __attribute__ ((noinline)) short
      25  foo(int len) {
      26    int i;
      27    short result = 0;
      28  
      29    for (i=0; i<len; i++) {
      30      result += (X[i] * Y[i]);
      31    }
      32    return result;
      33  }
      34  
      35  int main (void)
      36  {
      37    int i;
      38    short dot;
      39  
      40    check_vect ();
      41  
      42    dot = foo (N);
      43    if (dot != DOT)
      44      abort ();
      45  
      46    return 0;
      47  }
      48  
      49  /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */
      50  /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */
      51  
      52  /* When vectorizer is enhanced to vectorize accumulation into short for targets 
      53     that support accumulation into int (e.g. ia64) we'd have:
      54  dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } }
      55  */
      56  /* In the meantime expect: */
      57  /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi || vect_unpack } } } } */
      58