[LLVMbugs] [Bug 19172] New: [Windows] Wrong this adjustment calculated for virtual destructor in a class with complex inheritance

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19172

            Bug ID: 19172
           Summary: [Windows] Wrong this adjustment calculated for virtual
                    destructor in a class with complex inheritance
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: timurrrr at google.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Repro:
--------------------------------
#include "common.h"

struct A {
  virtual ~A() {}
  int a;
};

struct B : virtual A {
  virtual ~B() {}
  int b;
};

struct C : virtual A {
  virtual ~C() {}
  void destroy();
  int c;
};

struct D : B, C {
  virtual ~D() {}
  int d;
};

struct E {
  virtual ~E() {}
  int e;
};

struct F : D, E {
  virtual ~F();
  int f;
};

extern int d_dtor_calls;

#ifdef CONFIG_1
F::~F() {
  CHECK_EQ(1, a);
  CHECK_EQ(2, b);
  CHECK_EQ(3, c);
  CHECK_EQ(4, d);
  CHECK_EQ(5, e);
  CHECK_EQ(6, f);
  d_dtor_calls++;
}

#else

int d_dtor_calls = 0;

void C::destroy() {
  delete this;
}

int main() {
  F *obj = new F;
  obj->a = 1;
  obj->b = 2;
  obj->c = 3;
  obj->d = 4;
  obj->e = 5;
  obj->f = 6;
  obj->destroy();
  CHECK_EQ(1, d_dtor_calls);
}
#endif
-------------------------------
If the F::~F() is compiled with Clang and everything else with CL, the program
segfaults.

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