[mips] Involves microMIPS's jump in the analyzable branch set

Involves microMIPS's jump in the analyzable branch set to reduce some
code patterns.

Differential revision: https://reviews.llvm.org/D50613

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340931 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed