Viewing file:  loop-interchange-1.c (999 B) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-O2 -floop-interchange -fassociative-math -fno-signed-zeros -fno-trapping-math -fdump-tree-linterchange-details" } */
/* { dg-require-effective-target size32plus } */
/* { dg-skip-if "too big data segment" { visium-*-* } } */
/* Copied from graphite/interchange-4.c */
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#endif
double u[1782225];
static int __attribute__((noinline))
foo (int N, int *res)
{
int i, j;
double sum = 0;
for (i = 0; i < N; i++)
for (j = 0; j < N; j++)
sum = sum + u[i + 1335 * j];
for (i = 0; i < N; i++)
u[1336 * i] *= 2;
*res = sum + N + u[1336 * 2] + u[1336];
}
extern void abort ();
int
main (void)
{
int i, j, res;
for (i = 0; i < 1782225; i++)
u[i] = 2;
foo (1335, &res);
#if DEBUG
fprintf (stderr, "res = %d \n", res);
#endif
if (res != 3565793)
abort ();
return 0;
}
/* { dg-final { scan-tree-dump-times "Loop_pair<outer:., inner:.> is interchanged" 1 "linterchange"} } */
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