MIPS: Initial version of optimizing compiler for MIPS64R6.

(cherry picked from commit 4dda3376b71209fae07f5c3c8ac3eb4b54207aa8)
(amended for mnc-dev)

Bug: 21555893
Change-Id: I874dc356eee6ab061a32f8f3df5f8ac3a4ab7dcf
Signed-off-by: Alexey Frunze <Alexey.Frunze@imgtec.com>
Signed-off-by: Douglas Leung <douglas.leung@imgtec.com>
16 files changed