1  __attribute__ ((__noreturn__)) extern void fail (void);
       2  
       3  char x;
       4  
       5  /* This used to get stuck in an infinite loop in find_comparison_args
       6     when compiling this function for MIPS at -O2.  */
       7  
       8  void foo (const unsigned char y)
       9  {
      10     ((void) (__builtin_expect((!! y == y), 1) ? 0 : (fail (), 0)));
      11     x = ! y;
      12  }
      13  
      14  /* This used to similarly get stuck when compiling for PowerPC at -O2.  */
      15  
      16  int foo2 (int arg)
      17  {
      18    if (arg != !arg)
      19      fail ();
      20    if (arg)
      21      fail ();
      22  }