1 long subv0(void *p, int   a) { return p - ((void*)0); }
   2 long subvc(void *p, int   a) { return p - ((void*)8); }
   3 long subva(void *p, int   a) { return p - ((void*)a); }
   4 long subvq(void *p, void *q) { return p - q; }
   5 
   6 long subi0(int  *p, int   a) { return p - ((int *)0); }
   7 long subic(int  *p, int   a) { return p - ((int *)8); }
   8 long subia(int  *p, int   a) { return p - ((int *)a); }
   9 long subiq(int  *p, int  *q) { return p - q; }
  10 
  11 long subvm3(void *p, int   a) { return (p - ((void*)0)) * 3; }
  12 long subvx3(void *p, int   a) { return (p - ((void*)0)) ^ 3; }
  13 
  14 /*
  15  * check-name: pointer-sub
  16  * check-command: sparsec -Wno-int-to-pointer-cast -Wno-decl -c $file -o tmp.o
  17  */