ns = @names c32le {
   struct foo {
   	  @0x4 union {
	    	@0x0 int x;
		@0x4;
	  };
	  @0x8;
   };
   @0x0 struct foo foo;
};
as = mkzas(1024);
dom = mkdom(ns, as);
p = &dom`foo;
printf("%x %t %d\n", &p->x, p->x, p->x);