5fa5ffeb6c
Fixes #64619 Clang warns diagnostic for non-standard layout types in `offsetof` only if they are in evaluated context. With this patch, you'll also get diagnostic if you use `offsetof` on non-standard layout types in any other contexts
44 lines
1.7 KiB
C++
44 lines
1.7 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -DTEST_FOR_WARNING -Wno-error=incompatible-ms-struct -verify -triple i686-apple-darwin9 -std=c++11 %s
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// RUN: %clang_cc1 -fsyntax-only -DTEST_FOR_WARNING -Wno-error=incompatible-ms-struct -verify -triple armv7-apple-darwin9 -std=c++11 %s
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// RUN: %clang_cc1 -fsyntax-only -DTEST_FOR_ERROR -verify -triple armv7-apple-darwin9 -std=c++11 %s
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// RUN: %clang_cc1 -fsyntax-only -DNO_PRAGMA -mms-bitfields -verify -triple armv7-apple-darwin9 -std=c++11 %s
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#ifndef NO_PRAGMA
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#pragma ms_struct on
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#endif
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struct A {
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unsigned long a:4;
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unsigned char b;
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};
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struct B : public A {
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#ifdef TEST_FOR_ERROR
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// expected-error@-2 {{ms_struct may not produce Microsoft-compatible layouts for classes with base classes or virtual functions}}
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#elif defined(TEST_FOR_WARNING)
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// expected-warning@-4 {{ms_struct may not produce Microsoft-compatible layouts for classes with base classes or virtual functions}}
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#endif
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unsigned long c:16;
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int d;
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B();
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};
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static_assert(__builtin_offsetof(B, d) == 12,
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"We can't allocate the bitfield into the padding under ms_struct");
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// expected-warning@-2 {{offset of on non-standard-layout type 'B'}}
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struct C {
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#ifdef TEST_FOR_ERROR
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// expected-error@-2 {{ms_struct may not produce Microsoft-compatible layouts for classes with base classes or virtual functions}}
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#elif defined(TEST_FOR_WARNING)
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// expected-warning@-4 {{ms_struct may not produce Microsoft-compatible layouts for classes with base classes or virtual functions}}
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#endif
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virtual void foo();
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long long n;
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};
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static_assert(__builtin_offsetof(C, n) == 8,
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"long long field in ms_struct should be 8-byte aligned");
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// expected-warning@-2 {{offset of on non-standard-layout type 'C'}}
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