1  /* { dg-do run } */
       2  /* { dg-options "-O2 -fno-tree-ch -fdump-tree-optimized" } */
       3  
       4  /* This test case is based on gcc.dg/tree-ssa/clz-char.c. */
       5  
       6  #define PREC (sizeof(short) * 8)
       7  
       8  int
       9  __attribute__ ((noinline, noclone))
      10  foo (unsigned short b) {
      11      int c = 0;
      12  
      13      if (b == 0)
      14        return PREC;
      15  
      16      while (!(b & (1 << (PREC - 1)))) {
      17  	b <<= 1;
      18  	c++;
      19      }
      20  
      21      return c;
      22  }
      23  
      24  int main()
      25  {
      26    if (foo(0) != PREC)
      27      __builtin_abort ();
      28    if (foo(1 << (PREC - 1)) != 0)
      29      __builtin_abort ();
      30    if (foo(35) != PREC - 6)
      31      __builtin_abort ();
      32    return 0;
      33  }
      34  
      35  /* { dg-final { scan-tree-dump-times "__builtin_clz|\\.CLZ" 1 "optimized" } } */