Viewing file:  vect-106.c (1.24 KB) -rw-r--r--
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/* { dg-require-effective-target vect_int } */
#include <stdlib.h>
#include <stdarg.h>
#include "tree-vect.h"
#define N 9
static int a[N] = {1,2,3,4,5,6,7,8,9};
static int b[N] = {2,3,4,5,6,7,8,9,0};
__attribute__ ((noinline))
int main1 () {
int i;
int *p, *q, *p1, *q1;
p = (unsigned int *) malloc (sizeof (unsigned int) * N);
q = (unsigned int *) malloc (sizeof (unsigned int) * N);
p1 = p; q1 = q;
/* Vectorizable, before pointer plus we would get a redundant cast
(caused by pointer arithmetics), alias analysis fails to distinguish
between the pointers. */
for (i = 0; i < N; i++)
{
*(q + i) = a[i];
*(p + i) = b[i];
}
/* check results: */
for (i = 0; i < N; i++)
{
if (*q != a[i] || *p != b[i])
abort();
q++;
p++;
}
q = q1;
p = p1;
/* Vectorizable. */
for (i = 0; i < N; i++)
{
*q = b[i];
*p = a[i];
q++;
p++;
}
q = q1;
p = p1;
/* check results: */
for (i = 0; i < N; i++)
{
if (*q != b[i] || *p != a[i])
abort();
q++;
p++;
}
return 0;
}
int main (void)
{
check_vect ();
return main1 ();
}
/* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
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