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Summary: This patch forces the alignment of the `data` field of `IntervalMap`. It is because x86 MSVC doesn't apply automatically (without `__declspec(align(...))`) alignments more than 4 bytes, even if `alignof` has returned so. Consider the example: https://godbolt.org/z/zIPa_G Here `alignof` for both `S0` and `S1` returns `8`, but only `S1` is really aligned on x86. The explanation of this behavior is here: https://docs.microsoft.com/en-us/cpp/build/conflicts-with-the-x86-compiler Reviewers: bkramer, stoklund, hans, rnk Reviewed By: rnk Subscribers: dexonsmith, llvm-commits Differential Revision: https://reviews.llvm.org/D52613 llvm-svn: 344018
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