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_usad_char } */
4 
5 #include <stdarg.h>
6 #include "tree-vect.h"
7 
8 #define N 64
9 #define SAD N*N/2
10 
11 unsigned char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
12 unsigned char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
13 int abs (int);
14 
15 /* Sum of absolute differences between arrays of unsigned char types.
16    Detected as a sad pattern.
17    Vectorized on targets that support sad for unsigned chars.  */
18 
19 __attribute__ ((noinline)) int
foo(int len)20 foo (int len)
21 {
22   int i;
23   int result = 0;
24 
25   for (i = 0; i < len; i++)
26     result += abs (X[i] - Y[i]);
27 
28   return result;
29 }
30 
31 
32 int
main(void)33 main (void)
34 {
35   int i;
36   int sad;
37 
38   check_vect ();
39 
40   for (i = 0; i < N; i++)
41     {
42       X[i] = i;
43       Y[i] = N - i;
44       __asm__ volatile ("");
45     }
46 
47   sad = foo (N);
48   if (sad != SAD)
49     abort ();
50 
51   return 0;
52 }
53 
54 /* { dg-final { scan-tree-dump-times "sad pattern recognized" 1 "vect" } } */
55 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
56 
57