summaryrefslogtreecommitdiff
path: root/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s16a.c
blob: c986344165bde3689956d2d73a8488f22f6cf4a9 (plain)
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
/* { dg-require-effective-target vect_int } */

#include <stdarg.h>
#include "tree-vect.h"

#define N 64
#define DOT 43680

signed short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
signed short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));

/* short->int->int dot product.
   Detected as a dot-product pattern.
   Vectorized on targets that support dot-product for signed shorts.  */

__attribute__ ((noinline)) int
foo (int len)
{
  int i;
  int result = 0;

  for (i = 0; i < len; i++)
    {
      result += (X[i] * Y[i]);
    }
  return result;
}


int
main (void)
{
  int i;
  int dot;

  check_vect ();

  for (i = 0; i < N; i++)
    {
      X[i] = i;
      Y[i] = N - i;
      __asm__ volatile ("");
    }

  dot = foo (N);
  if (dot != DOT)
    abort ();

  return 0;
}

/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_hi } } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_mult_hi_to_si } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */