// { dg-do run  }// Test that we only call f once and that pointers to different subobjects// compare as different.struct A { void f() { } };struct B: public A { };struct C: public A { };struct D : public B, public C { };typedef void (B::*bp)();typedef void (C::*cp)();typedef void (D::*dp)();dp d1;int call;dp f () { ++call; return d1; }int main(){  bp b = &A::f;  cp c = &A::f;  d1 = b;  dp d2 = c;  return (f() == d2 || call != 1);}