clang/test/SemaCXX/vtordisp-mode.cpp

   1 // RUN: %clang_cc1 -triple i686-pc-win32 -std=c++11 -vtordisp-mode=0 -DVTORDISP_MODE=0 %s -verify
   2 // RUN: %clang_cc1 -triple i686-pc-win32 -std=c++11 -vtordisp-mode=1 -DVTORDISP_MODE=1 %s -verify
   3 // RUN: %clang_cc1 -triple i686-pc-win32 -std=c++11 -vtordisp-mode=2 -DVTORDISP_MODE=2 %s -verify
   4
   5 // expected-no-diagnostics
   6
   7 struct A {
   8   A();
   9   virtual void foo();
  10 };
  11
  12 // At /vd1, there is a vtordisp before A.
  13 struct B : virtual A {
  14   B();
  15   virtual void foo();
  16   virtual void bar();
  17 };
  18
  19 // At /vd2, there is a vtordisp before B, but only because it has its own
  20 // vftable.
  21 struct C : virtual B {
  22   C();
  23 };
  24
  25 // There are two vfptrs, two vbptrs, and some number of vtordisps.
  26 static_assert(sizeof(C) == 2 * 4 + 2 * 4 + 4 * VTORDISP_MODE, "size mismatch");