Viewing file:  bb-slp-29.c (1.2 KB) -rw-r--r--
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/* { dg-require-effective-target vect_int } */
#include <stdarg.h>
#include "tree-vect.h"
#define A 3
#define B 4
#define N 256
short src[N], dst[N];
void foo (short * __restrict__ dst, short * __restrict__ src, int h,
int stride)
{
int i;
h /= 16;
for (i = 0; i < h; i++)
{
dst[0] = A*src[0] + B*src[1];
dst[1] = A*src[1] + B*src[2];
dst[2] = A*src[2] + B*src[3];
dst[3] = A*src[3] + B*src[4];
dst[4] = A*src[4] + B*src[5];
dst[5] = A*src[5] + B*src[6];
dst[6] = A*src[6] + B*src[7];
dst[7] = A*src[7] + B*src[8];
dst += stride;
src += stride;
asm volatile ("" ::: "memory");
}
}
int main (void)
{
int i;
check_vect ();
for (i = 0; i < N; i++)
{
dst[i] = 0;
src[i] = i;
}
foo (dst, src, N, 8);
for (i = 0; i < N/2; i++)
{
if (dst[i] != A * src[i] + B * src[i+1])
abort ();
}
return 0;
}
/* Exclude POWER8 (only POWER cpu for which vect_element_align is true)
because loops have vectorized before SLP gets a shot. */
/* { dg-final { scan-tree-dump-times "optimized: basic block" 1 "slp1" { target { { vect_int_mult && vect_element_align } && { ! powerpc*-*-* } } } } } */
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