gcc/testsuite/gcc.dg/pr101741.c

   1 /* PR tree-optimization/101741 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 " } */
   4
   5 int
   6 foo (void);
   7
   8 unsigned int
   9 toupper (int c)
  10 {
  11   c = foo ();
  12   while (c)
  13     c = toupper (c);
  14
  15   return c;
  16 }