clang/test/SemaCXX/ms_struct.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -DTEST_FOR_WARNING -Wno-error=incompatible-ms-struct -verify -triple i686-apple-darwin9 -std=c++11 %s
   2 // RUN: %clang_cc1 -fsyntax-only -DTEST_FOR_WARNING -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 // RUN: %clang_cc1 -fsyntax-only -DNO_PRAGMA -mms-bitfields -verify -triple armv7-apple-darwin9 -std=c++11 %s
   5
   6 #ifndef NO_PRAGMA
   7 #pragma ms_struct on
   8 #endif
   9
  10 struct A {
  11   unsigned long a:4;
  12   unsigned char b;
  13 };
  14
  15 struct B : public A {
  16 #ifdef TEST_FOR_ERROR
  17   // expected-error@-2 {{ms_struct may not produce Microsoft-compatible layouts for classes with base classes or virtual functions}}
  18 #elif defined(TEST_FOR_WARNING)
  19   // expected-warning@-4 {{ms_struct may not produce Microsoft-compatible layouts for classes with base classes or virtual functions}}
  20 #endif
  21   unsigned long c:16;
  22         int d;
  23   B();
  24 };
  25
  26 static_assert(__builtin_offsetof(B, d) == 12,
  27   "We can't allocate the bitfield into the padding under ms_struct");
  28
  29 // rdar://16178895
  30 struct C {
  31 #ifdef TEST_FOR_ERROR
  32   // expected-error@-2 {{ms_struct may not produce Microsoft-compatible layouts for classes with base classes or virtual functions}}
  33 #elif defined(TEST_FOR_WARNING)
  34   // expected-warning@-4 {{ms_struct may not produce Microsoft-compatible layouts for classes with base classes or virtual functions}}
  35 #endif
  36   virtual void foo();
  37   long long n;
  38 };
  39
  40 static_assert(__builtin_offsetof(C, n) == 8,
  41               "long long field in ms_struct should be 8-byte aligned");
  42 #if !defined(TEST_FOR_ERROR) && !defined(TEST_FOR_WARNING)
  43 // expected-no-diagnostics
  44 #endif