-fvtable-gc

[Richard Henderson <rth at redhat dot com>]

So I was attempting this afternoon to implement the thing properly,
i.e. with notes and calls into varasm.c instead of random asm hackery
in cp/foo.c.  But I was defeated in my quest to figure out how to
differentiate method calls from normal calls, and member address
taking at all.

What is METHOD_CALL_EXPR if not for calling methods?  If I have 

  struct F { virtual void foo(); };
  void bar(F *f) { f->foo(); } 

I get a CALL_EXPR.  If I have

  typedef void (F::*F_ptr)();
  F_ptr baz() { return &F::foo; }

I get an OFFSET_REF, which isn't actually documented anywhere,
and I can't figure out what it means exactly.


r~