1  /* Check that compare-branch is inverted properly.
       2     Example:
       3  	mov	#1,r0	->	tst	r8,r8
       4  	neg	r8,r1		bt	.L47
       5  	shad	r1,r0
       6  	tst	#1,r0
       7  	bf	.L47
       8  */
       9  /* { dg-do compile }  */
      10  /* { dg-options "-O2" } */
      11  /* { dg-final { scan-assembler-not "shad|neg" } } */
      12  
      13  int test_01_00 (int*, void*);
      14  int
      15  test_01 (int* m, void* v)
      16  {
      17    unsigned long n = (unsigned long)v - 1;
      18  
      19    if (!n)
      20      return 50;
      21    
      22    if (1 & (1 << n))	/* if n == 0: 1 & (1 << 0) -> true  */
      23      return 60;		
      24    else			/* if n != 0: 1 & (1 << n) -> false  */
      25      return -8;
      26  }