[LLVMbugs] [Bug 18467] New: [-cxx-abi microsoft] wrong layout involving empty base class at offset 0

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18467

            Bug ID: 18467
           Summary: [-cxx-abi microsoft] wrong layout involving empty base
                    class at offset 0
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: david.majnemer at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

extern "C" int printf(const char *fmt, ...);

struct A {};
struct B {
  int field;
};
struct C : public A, public B {};
struct D : public C, public A, public B {};

int main() {
  printf("sizeof(D): %d\n", sizeof(D));
}

we get:
sizeof(D): 12

we should get:
sizeof(D): 8

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