gcc/testsuite/gcc.dg/tree-ssa/loop-10.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized -fno-finite-loops" } */
   3 /* { dg-require-effective-target int32plus } */
   4
   5 int bar (void);
   6
   7 void foo (void)
   8 {
   9   unsigned i, j, n;
  10
  11   for (i = 0; i < 100000; i++)
  12     ;
  13
  14   n = bar ();
  15   for (i = 0; i < n; i++)
  16     ;
  17
  18   for (i = 0; i < n; i++)
  19     for (j = 0; j < n; j++)
  20       ;
  21
  22   /* These should not be removed.  */
  23   for (i = 0; i < 10000; i++)
  24     bar ();
  25
  26   for (i = 0; i != n; i += 2)
  27     ;
  28 }
  29
  30 /* { dg-final { scan-tree-dump-times "if " 3 "optimized" } } */
  31 /* { dg-final { scan-tree-dump-times "bar " 2 "optimized" } } */
  32