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  /* { dg-require-effective-target arm_v8_2a_dotprod_neon_hw { target { aarch64*-*-* || arm*-*-* } } } */
       5  /* { dg-additional-options "-march=armv8.2-a+dotprod" { target { aarch64*-*-* } } } */
       6  /* { dg-add-options arm_v8_2a_dotprod_neon }  */
       7  
       8  #include <stdarg.h>
       9  #include "tree-vect.h"
      10  
      11  #define N 64
      12  
      13  #define DOT1 43680
      14  
      15  signed char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
      16  signed char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
      17  
      18  /* char->short->int dot product.
      19     The dot-product pattern should be detected.
      20     Vectorizable on vect_sdot_qi targets (targets that support dot-product of 
      21     signed chars).
      22  
      23     In the future could also be vectorized as widening-mult + widening-summation,
      24     or with type-conversion support.
      25   */
      26  __attribute__ ((noinline)) int
      27  foo1(int len) {
      28    int i;
      29    int result = 0;
      30    short prod;
      31  
      32    for (i=0; i<len; i++) {
      33      prod = X[i] * Y[i];
      34      result += prod;
      35    }
      36    return result;
      37  }
      38  
      39  int main (void)
      40  {
      41    int i, dot1;
      42  
      43    check_vect ();
      44  
      45    for (i=0; i<N; i++) {
      46      X[i] = i;
      47      Y[i] = 64-i;
      48      __asm__ volatile ("");
      49    }
      50  
      51    dot1 = foo1 (N);
      52    if (dot1 != DOT1)
      53      abort ();
      54  
      55    return 0;
      56  }
      57  
      58  /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */
      59  /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */
      60  /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } } } */
      61  /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi && vect_widen_sum_hi_to_si } } } } */
      62