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Summary: The current implementation of aligned storage was written before we had `alignas`, so it used a list of builtin types to force the alignment. But this doesn't work overaligned requests. This patch adds a fallback case supporting over-alignment. It only affects case that were previously ill-formed. Reviewers: rsmith, ldionne, dlj, mclow.lists Reviewed By: mclow.lists Subscribers: mclow.lists, dexonsmith, libcxx-commits Differential Revision: https://reviews.llvm.org/D61301 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@359596 91177308-0d34-0410-b5e6-96231b3b80d8