tree cbf528aedc060c2e27ab9d7c3bb80e37e5bebd0a
parent 2b5899e7fc582a8adf16903c30be02ab947510c6
author Jingyue Wu <jingyue@google.com> 1431647599 +0000
committer Jingyue Wu <jingyue@google.com> 1431647599 +0000

[ValueTracking] refactor: extract method haveNoCommonBitsSet

Summary:
Extract method haveNoCommonBitsSet so that we don't have to duplicate this logic in
InstCombine and SeparateConstOffsetFromGEP.

This patch also makes SeparateConstOffsetFromGEP more precise by passing
DominatorTree to computeKnownBits.

Test Plan: value-tracking-domtree.ll that tests ValueTracking indeed leverages dominating conditions

Reviewers: broune, meheff, majnemer

Reviewed By: majnemer

Subscribers: jholewinski, llvm-commits

Differential Revision: http://reviews.llvm.org/D9734

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237407 91177308-0d34-0410-b5e6-96231b3b80d8