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f5ed85b2c8
simplified model for use simulating each iteration into a separate helper function that just returns the cache. Building this cache had nothing to do with the rest of the unroll analysis and so this removes an unnecessary coupling, etc. It should also make it easier to think about the concept of providing fast cached access to basic SCEV models as an orthogonal concept to the overall unroll simulation. I'd really like to see this kind of caching logic folded into SCEV itself, it seems weird for us to provide it at this layer rather than making repeated queries into SCEV fast all on their own. No functionality changed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237993 91177308-0d34-0410-b5e6-96231b3b80d8