1 /* { dg-do run } */
2 /* { dg-options "-O2 -floop-interchange -fassociative-math -fno-signed-zeros -fno-trapping-math -fdump-tree-linterchange-details" } */
3 /* { dg-require-effective-target size32plus } */
4 /* { dg-skip-if "too big data segment" { visium-*-* } } */
5 
6 /* Copied from graphite/interchange-4.c */
7 
8 #define DEBUG 0
9 #if DEBUG
10 #include <stdio.h>
11 #endif
12 
13 double u[1782225];
14 
15 static int __attribute__((noinline))
foo(int N,int * res)16 foo (int N, int *res)
17 {
18   int i, j;
19   double sum = 0;
20   for (i = 0; i < N; i++)
21     for (j = 0; j < N; j++)
22       sum = sum + u[i + 1335 * j];
23 
24   for (i = 0; i < N; i++)
25     u[1336 * i] *= 2;
26 
27   *res = sum + N + u[1336 * 2] + u[1336];
28 }
29 
30 extern void abort ();
31 
32 int
main(void)33 main (void)
34 {
35   int i, j, res;
36 
37   for (i = 0; i < 1782225; i++)
38     u[i] = 2;
39 
40   foo (1335, &res);
41 
42 #if DEBUG
43   fprintf (stderr, "res = %d \n", res);
44 #endif
45 
46   if (res != 3565793)
47     abort ();
48 
49   return 0;
50 }
51 
52 /* { dg-final { scan-tree-dump-times "Loop_pair<outer:., inner:.> is interchanged" 1 "linterchange"} } */
53