Driver: Implement -cl-denorms-are-zero

This is currently a no-op, which is allowed by the OpenCL specification.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216179 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Add processor type for hainan

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216180 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Implement getPointerWidthV()

This fixes a crash in the OCL_ImgProc/Canny OpenCV test.

NOTE: This is a candidate for the 3.5 branch.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216181 91177308-0d34-0410-b5e6-96231b3b80d8