Split out the plain '.{8|16|32|64}' suffix handling.

Make it easier to deal with aliases for instructions that do require a suffix
but accept more specific variants of the same size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144588 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed