*** old/src/share/vm/opto/connode.cpp	Fri Feb 17 16:23:59 2012
--- new/src/share/vm/opto/connode.cpp	Fri Feb 17 16:23:59 2012

*** 1049,1058 ****
--- 1049,1059 ----
  
  //=============================================================================
  //------------------------------Value------------------------------------------
  const Type *CastX2PNode::Value( PhaseTransform *phase ) const {
    const Type* t = phase->type(in(1));
+   if (t == Type::TOP) return Type::TOP;
    if (t->base() == Type_X && t->singleton()) {
      uintptr_t bits = (uintptr_t) t->is_intptr_t()->get_con();
      if (bits == 0)   return TypePtr::NULL_PTR;
      return TypeRawPtr::make((address) bits);
    }

*** 1119,1128 ****
--- 1120,1130 ----
  
  //=============================================================================
  //------------------------------Value------------------------------------------
  const Type *CastP2XNode::Value( PhaseTransform *phase ) const {
    const Type* t = phase->type(in(1));
+   if (t == Type::TOP) return Type::TOP;
    if (t->base() == Type::RawPtr && t->singleton()) {
      uintptr_t bits = (uintptr_t) t->is_rawptr()->get_con();
      return TypeX::make(bits);
    }
    return CastP2XNode::bottom_type();