[X86] RegCall - Handling v64i1 in 32/64 bit target

Register Calling Convention defines a new behavior for v64i1 types.
This type should be saved in GPR.
However for 32 bit machine we need to split the value into 2 GPRs (because each is 32 bit).

Differential Revision: https://reviews.llvm.org/D26181

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287217 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed