1 // RUN: %clang_cc1 -fsyntax-only -Wno-error=incompatible-ms-struct -verify -triple i686-apple-darwin9 -std=c++11 %s 2 // RUN: %clang_cc1 -fsyntax-only -Wno-error=incompatible-ms-struct -verify -triple armv7-apple-darwin9 -std=c++11 %s 3 // RUN: %clang_cc1 -fsyntax-only -DTEST_FOR_ERROR -verify -triple armv7-apple-darwin9 -std=c++11 %s 4 5 #pragma ms_struct on 6 7 struct A { 8 unsigned long a:4; 9 unsigned char b; 10 }; 11 12 struct B : public A { 13 #ifdef TEST_FOR_ERROR 14 // expected-error@-2 {{ms_struct may not produce MSVC-compatible layouts for classes with base classes or virtual functions}} 15 #else 16 // expected-warning@-4 {{ms_struct may not produce MSVC-compatible layouts for classes with base classes or virtual functions}} 17 #endif 18 unsigned long c:16; 19 int d; 20 B(); 21 }; 22 23 static_assert(__builtin_offsetof(B, d) == 12, 24 "We can't allocate the bitfield into the padding under ms_struct"); 25 26 // rdar://16178895 27 struct C { 28 #ifdef TEST_FOR_ERROR 29 // expected-error@-2 {{ms_struct may not produce MSVC-compatible layouts for classes with base classes or virtual functions}} 30 #else 31 // expected-warning@-4 {{ms_struct may not produce MSVC-compatible layouts for classes with base classes or virtual functions}} 32 #endif 33 virtual void foo(); 34 long long n; 35 }; 36 37 static_assert(__builtin_offsetof(C, n) == 8, 38 "long long field in ms_struct should be 8-byte aligned"); 39