[mips][microMIPS] Make usage of ADDU16 and SUBU16 by code generator

Differential Revision: http://reviews.llvm.org/D7609


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229706 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed