[PATCH] D13242: [SCEV] Factor out common visiting patterns for SCEV rewriters. NFC.

[silviu.baranga@arm.com via llvm-commits]

sbaranga created this revision.
sbaranga added reviewers: anemet, mzolotukhin.
sbaranga added a subscriber: llvm-commits.
Herald added a subscriber: sanjoy.

Add a SCEVRewriteVisitor class which contains the common
visiting patterns used when rewriting SCEVs.

SCEVParameterRewriter and SCEVApplyRewriter now inherit
from SCEVRewriteVisitor (and are therefore much simpler).

http://reviews.llvm.org/D13242

Files:
  include/llvm/Analysis/ScalarEvolutionExpressions.h

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