Remove caching of an unused subtarget from MSP430FrameLowering.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211830 91177308-0d34-0410-b5e6-96231b3b80d8
Remove uses and caches of the target machine and subtarget from
both MSP430InstrInfo and MSP430RegisterInfo. Remove unused member
variable StackAlign from MSP430RegisterInfo. Update constructors
accordingly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211835 91177308-0d34-0410-b5e6-96231b3b80d8
Move the subtarget dependent features from the target machine to
the subtarget for the MSP430 target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211836 91177308-0d34-0410-b5e6-96231b3b80d8
Remove extraneous parens and extraneous const cast (and fix the
prototype for the function to patch what we were returning).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211837 91177308-0d34-0410-b5e6-96231b3b80d8
Remove commented out code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211838 91177308-0d34-0410-b5e6-96231b3b80d8
Remove comment that duplicated information in the constructor
that it's after.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211839 91177308-0d34-0410-b5e6-96231b3b80d8
Remove caching of the target machine in NVPTXInstrInfo and
update constructor accordingly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211840 91177308-0d34-0410-b5e6-96231b3b80d8