gcc/testsuite/gcc.dg/tree-ssa/ltrans-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ftree-loop-linear -fdump-tree-ltrans-all" } */
   3 /* { dg-require-effective-target size32plus } */
   4
   5 double u[1782225];
   6 int foo(int N, int *res)
   7 {
   8   int i, j;
   9   double sum = 0.0;
  10   /* This loop should be converted to a perfect nest and
  11      interchanged. */
  12   for (i = 0; i < N; i++)
  13     {
  14       for (j = 0; j < N; j++)
  15         sum = sum + u[i + 1335 * j];
  16
  17       u[1336 * i] *= 2;
  18     }
  19   *res = sum + N;
  20 }
  21 /* { dg-final { scan-tree-dump-times "converted loop nest to perfect loop nest" 1 "ltrans"} } */
  22 /* { dg-final { scan-tree-dump-times "transformed loop" 1 "ltrans"} } */
  23 /* { dg-final { cleanup-tree-dump "ltrans" } } */