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272871b658
Summary: Starting in Clang 8.0 and GCC 8.0, `alignof` and `__alignof` return different values in same cases. Specifically `alignof` and `_Alignof` return the minimum alignment for a type, where as `__alignof` returns the preferred alignment. libc++ currently uses `__alignof` but means to use `alignof`. See llvm.org/PR39713 This patch introduces the macro `_LIBCPP_ALIGNOF` so we can control which spelling gets used. This patch does not introduce any ABI guard to provide the old behavior with newer compilers. However, if we decide that is needed, this patch makes it trivial to implement. I think we should commit this change immediately, and decide what we want to do about the ABI afterwards. Reviewers: ldionne, EricWF Reviewed By: ldionne, EricWF Subscribers: jyknight, christof, libcxx-commits Differential Revision: https://reviews.llvm.org/D54814 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@351289 91177308-0d34-0410-b5e6-96231b3b80d8 |
6 years ago | |
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| meta.trans.arr | 8 years ago | |
| meta.trans.cv | 8 years ago | |
| meta.trans.other | 6 years ago | |
| meta.trans.ptr | 9 years ago | |
| meta.trans.ref | 8 years ago | |
| meta.trans.sign | 8 years ago | |
| nothing_to_do.pass.cpp | 10 years ago | |