[PATCH] D55842: Let TableGen write output only if it changed, instead of doing so in cmake, attempt 2

[Simon Pilgrim via Phabricator via llvm-commits]

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@thakis As discussed on PR43385 I think we're going to revert this as it doesn't seem to be working correctly on MSVC in conjunction with rL371683 <https://reviews.llvm.org/rL371683>


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https://reviews.llvm.org/D55842