1  /* PR rtl-optimization/27671.
       2     The combiner used to simplify "a ^ b == a" to "a" via
       3     simplify_relational_operation_1 in simplify-rtx.c.  */
       4  /* { dg-do run } */
       5  /* { dg-options "-O1" } */
       6  /* { dg-options "-O1 -march=pentium4" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
       7  
       8  extern void abort (void) __attribute__ ((noreturn));
       9  extern void exit (int) __attribute__ ((noreturn));
      10  
      11  static void __attribute__ ((noinline))
      12  bar (int k)
      13  {
      14    int n = k % 2;
      15    if (n == 0)
      16      abort ();
      17  }
      18  
      19  int
      20  main (void)
      21  {  
      22    bar (1);
      23    exit (0);
      24  }