gcc/testsuite/gcc.dg/pr43562.c

   1 /* { dg-options "-O0" } */
   2 /* { dg-do compile } */
   3
   4 extern unsigned foo (void);
   5 extern void bar (void);
   6
   7 __attribute__ ((optimize ("O2")))
   8 void bak ()
   9 {
  10   unsigned a;
  11   while (1)
  12     {
  13       a = foo ();
  14       while (a)
  15         {
  16           a &= 1;
  17           bar ();
  18         }
  19     }
  20 }