#define N 500 int foo(void) { int i, j, k; int A[N+5][N+5][N+5]; /* Loop i: carried no dependency. */ for (i = 0; i < N; i++) for (j = 0; j < N; j++) for (k = 0; k < N; k++) A[k+1][j+2][i+1] = A[k][j][i+1]; for (i = 0; i < N; i++) /* Loop j: carried no dependency. */ for (j = 0; j < N; j++) /* Loop k: carreid no dependency. */ for (k = 0; k < N; k++) A[i+1][j][k] = A[i][j][k+1]; return A[1][5][2]; } int main(void) { foo(); return 0; } /* Check that parallel code generation part make the right answer. */ /* { dg-final { scan-tree-dump-times "3 loops carried no dependency" 1 "graphite" } } */ /* { dg-final { cleanup-tree-dump "graphite" } } */ /* { dg-final { scan-tree-dump-times "loopfn.0" 5 "optimized" } } */ /* { dg-final { cleanup-tree-dump "parloops" } } */ /* { dg-final { cleanup-tree-dump "optimized" } } */