[GISel]:Skip legalizing Intermediate inst(with generic types)

During legalization, targets can create Pseudo Instructions with
generic types. We shouldn't try to legalize them.

Reviewed by Quentin, dsanders
https://reviews.llvm.org/D32575

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302199 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed