Consider:
----
struct A { virtual ~A(); }; // 4
struct B { virtual ~B(); }; // 4
struct X : virtual public A,
virtual public B { // 8
};
struct Y : virtual public B { // 4
virtual ~Y();
};
struct Z : virtual public X, public Y { // 8
Z();
};
Z::Z() {}
----
In this example, the DECL_SIZE_UNIT of "Z" is 8 bytes. Here, the FIELD_DECL
corresponding to it's Y superclass has an offset of 0 bytes and size 4 bytes.
The FIELD_DECL for the X superclass has an offset of 4 bytes and and a size of
8 bytes, which means that the end of the object is 12 bytes, despite the fact
that Z has a DECL_SIZE_UNIT of 8 bytes.
-Chris
--
Summary: Type layout bug
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: sabre at nondot dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26426
