Revert "[X86] Widen the 'AND' mask if doing so shrinks the encoding size"

This reverts commit 245169 which miscompiles MultiSource/Applications/siod
from LNT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245432 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed