CodeGen: Make computeRegisterLiveness consider successors

If the end of the block is reached during the scan, check
the live ins of the successors. This was already done in the
other direction if the block entry was reached.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@341026 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed