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Loop unswitching makes substantial changes to a loop that can also affect cached SCEV info in its outer loops as well, but it only cares to invalidate SCEV cache for the innermost loop in case of full unswitching and does not invalidate anything at all in case of trivial unswitching. As result, we may end up with incorrect data in cache. Differential Revision: https://reviews.llvm.org/D46045 Reviewed By: mzolotukhin llvm-svn: 333072
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