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* [CodeGen] Add invalidation of the loop SCEVs after merge block generation.Michael Kruse2017-05-221-0/+70
The SCEVs of loops surrounding the escape users of a merge blocks are forgotten, so that loop trip counts based on old values can be revoked. This fixes llvm.org//PR32536 Contributed-by: Baranidharan Mohan <mbdharan@gmail.com> Differential Revision: https://reviews.llvm.org/D33195 llvm-svn: 303561
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