methods take an int or unsigned value instead of int64_t.
Also, add an 'addImm' method to the MachineInstrBuilder class, because the
fact that the hardware sign or zero extends it does not/should not matter
to the code generator. Once the old sparc backend is removed the difference
can be eliminated.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11976 91177308-0d34-0410-b5e6-96231b3b80d8
6a8a9b4413