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Commit a7d9ec87 authored by Sanjoy Das's avatar Sanjoy Das
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[SCEV] Make isImpliedCondOperandsViaRanges smarter 

This change lets us prove things like

  "{X,+,10} s< 5000" implies "{X+7,+,10} does not sign overflow"

It does this by replacing replacing getConstantDifference by
computeConstantDifference (which is smarter) in
isImpliedCondOperandsViaRanges.

llvm-svn: 276505
parent 401d031e
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