gcc/testsuite/gcc.dg/autopar/outer-3.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ftree-parallelize-loops=4 -fdump-tree-parloops-details -fdump-tree-optimized" } */
   3
   4 void abort (void);
   5
   6 void parloop (int N)
   7 {
   8   int i, j;
   9   int x[500][500];
  10
  11   for (i = 0; i < N; i++)
  12     for (j = 0; j < i; j++)
  13       x[i][j] = i + j + 3;
  14
  15   for (i = 0; i < N; i++)
  16     for (j = 0; j < i; j++)
  17       if (x[i][j] != i + j + 3)
  18         abort ();
  19 }
  20
  21 int main(void)
  22 {
  23   parloop(500);
  24
  25   return 0;
  26 }
  27
  28
  29 /* Check that outer loop is parallelized.  */
  30 /* { dg-final { scan-tree-dump-times "parallelizing outer loop" 1 "parloops" } } */
  31 /* { dg-final { scan-tree-dump-times "loopfn" 5 "optimized" } } */
  32 /* { dg-final { cleanup-tree-dump "parloops" } } */
  33 /* { dg-final { cleanup-tree-dump "optimized" } } */