Fix for PR1596: AdjustCopiesBackFrom() should conservatively check if any of its sub-registers may overlap with the interval of the copy that's being coalesced.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41084 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed