Add support for SPIR64 target - the 64bit counterpart of SPIR.

The new OpenCL SPIR extension spec will define separate SPIR for 32 and 64 bit architectures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168036 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed