Do not overwrite an input register in shift operations.

'second_reg' is an input register that can survive the instruction.
Instead use the output register as a temporary result.

bug:21667432

(cherry picked from commit a4f3581da73b83484a30ab499c4f8ad43b378dab)

Change-Id: Ic1f399964911b8a9fc57352130c92b2a0a1b8e0d
5 files changed