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)16foo (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)33main (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