http://llvm.org/bugs/show_bug.cgi?id=17816
Bug ID: 17816
Summary: [-cxx-abi] Wrong class layout in the presence of
vbtables/vftables
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
-------------
struct A { int a; };
struct B { int b; };
struct C { int c; };
struct D : virtual A { int d; };
struct E : virtual B {
virtual void foo(); // Issues a vfptr.
int e;
};
struct F: virtual C, D, E { int f; };
F f;
---------------
As of r194076, it results in the following layout:
0 | struct F
12 | struct D (base)
12 | (D vbtable pointer)
16 | int d
0 | struct E (primary base)
0 | (E vftable pointer)
4 | (E vbtable pointer)
8 | int e
20 | int f
24 | struct C (virtual base)
24 | int c
28 | struct A (virtual base)
28 | int a
32 | struct B (virtual base)
32 | int b
However, the nvbase E should be laid out before nvbase D.
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