[LLVMbugs] [Bug 18617] New: MS ABI: Offset of pointer to member is wrong

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18617

            Bug ID: 18617
           Summary: MS ABI: Offset of pointer to member is wrong
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: All
            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 *, ...);
static char buffer[419430400];
inline void *operator new(size_t, void *pv) { return pv; }
struct __virtual_inheritance Virtual;
struct A {
  int Virtual::*Field;
  A() { printf("Field: %d\n", (int)((char *)&Field - buffer)); }
};
struct B : virtual A {};
int main() { new (buffer) B; }

we get:
Field: 4

msvc gets:
Field: 8

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