http://llvm.org/bugs/show_bug.cgi?id=19399
Bug ID: 19399
Summary: MS ABI: Layout of class hierarchy with overridden
methods and virtual inheritance is wrong
Product: clang
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
consider:
extern "C" int printf(const char *, ...);
struct A {
virtual void fun() {}
};
struct B: public A {};
struct C: public virtual A {
virtual void fun() {}
C() {}
};
struct D: public virtual C, public virtual B {};
int main() {
printf("sizeof(D): %Iu\n", sizeof(D));
}
32-bit:
clang gives D size 24, msvc gives it size 20
64-bit:
clang gives D size 48, msvc gives it size 40
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