Sanjoy Das fa29211988 [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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276505 91177308-0d34-0410-b5e6-96231b3b80d8
2016-07-23 00:54:36 +00:00
..