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/* { dg-require-effective-target vect_usad_char } */
#include <stdarg.h>
#include "tree-vect.h"
#define N 64
#define SAD N*N/2
unsigned char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
unsigned char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
int abs (int);
/* Sum of absolute differences between arrays of unsigned char types.
Detected as a sad pattern.
Vectorized on targets that support sad for unsigned chars. */
__attribute__ ((noinline)) int
foo (int len)
{
int i;
int result = 0;
for (i = 0; i < len; i++)
result += abs (X[i] - Y[i]);
return result;
}
int
main (void)
{
int i;
int sad;
check_vect ();
for (i = 0; i < N; i++)
{
X[i] = i;
Y[i] = N - i;
__asm__ volatile ("");
}
sad = foo (N);
if (sad != SAD)
abort ();
return 0;
}
/* { dg-final { scan-tree-dump-times "vect_recog_sad_pattern: detected" 1 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
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