Remove dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173812 91177308-0d34-0410-b5e6-96231b3b80d8
Add constant extender support for MInst type instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173813 91177308-0d34-0410-b5e6-96231b3b80d8
Use multiclass for post-increment store instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173816 91177308-0d34-0410-b5e6-96231b3b80d8