http://llvm.org/bugs/show_bug.cgi?id=20479
Bug ID: 20479
Summary: MS ABI: Insufficient VFTable entries generated by
clang
Product: clang
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
consider:
struct A {
virtual A *f() { return this; };
};
struct B : virtual A {
virtual B *f() { return this; };
B() {}
};
struct C : virtual A, B {};
C c;
clang has:
const C::`vftable'[0]: [thunk]:public: virtual struct A * __thiscall
B::f`vtordisp{4294967292,0}' (void)
MSVC has:
const C::`vftable'[0]: [thunk]:public: virtual struct B * __thiscall
B::f`vtordisp{4294967292,0}' (void)
const C::`vftable'[4]: public: virtual struct B * __thiscall B::f(void)
This bug can effect builds involving RTTI in interesting ways, this seems
pretty serious.
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