Handle the case of live 16-bit subregisters in X86FixupBWInsts

Differential Revision: https://reviews.llvm.org/D40524

Change-Id: Ie3a405b28503ceae999f5f3ba07a68fa733a2400

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321674 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed