[IndVarSimplify] Make cost estimation in RewriteLoopExitValues smarter

Differential Revision: http://reviews.llvm.org/D11687



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244474 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed