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Currently several places assume the VAL member is always at least the same size as pVal. In particular for a memcpy in the move assignment operator. While this is a true assumption, it isn't good practice to assume this. This patch gives the union a name so we can write the memcpy in terms of the union itself. This also adds a similar memcpy to the move constructor where we previously just copied using VAL directly. This patch is mostly just a mechanical addition of the U in front of VAL and pVAL everywhere. But several constructors had to be modified since we can't directly initializer a field of named union from the initializer list. Differential Revision: https://reviews.llvm.org/D30629 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302040 91177308-0d34-0410-b5e6-96231b3b80d8
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