gcc/testsuite/gcc.dg/Waddress-2.c

   1 /* PR c/48778 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Waddress" } */
   4
   5 #define NULL ((void *) 0)
   6
   7 #define M1(b) ((b) != NULL ? 0 : (b))
   8 #define M2(b) ((b) == NULL ? 0 : (b))
   9 #define M3(b) (NULL != (b) ? 0 : (b))
  10 #define M4(b) (NULL == (b) ? 0 : (b))
  11
  12 int
  13 func (int b)
  14 {
  15   if (M1 (&b) > 0)
  16     return 1;
  17   if (M2 (&b) > 0)
  18     return 2;
  19   if (M3 (&b) > 0)
  20     return 3;
  21   if (M4 (&b) > 0)
  22     return 4;
  23   return 0;
  24 }