[x86] Lowering Mask Set1 intrinsics to LLVM IR

This patch, together with a matching clang patch (https://reviews.llvm.org/D37668), implements the lowering of X86 mask set1 intrinsics to IR.

Differential Revision: https://reviews.llvm.org/D37669

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313625 91177308-0d34-0410-b5e6-96231b3b80d8
15 files changed