[AVX512] Added load/store from BW/VL subsets to Register2Memory opcode tables.
Added lowering tests for these instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218508 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Generalize the handling of f128 return values to support f128 arguments.

Summary:
This will allow us to handle f128 arguments without duplicating code from
CCState::AnalyzeFormalArguments() or CCState::AnalyzeCallOperands().

No functional change.

Reviewers: vmedic

Reviewed By: vmedic

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5292

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218509 91177308-0d34-0410-b5e6-96231b3b80d8