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