[X86] Remove CodeGenOnly instructions added in r373021, but keep the isel patterns and add COPY_TO_REGCLASS to them.
[X86] Remove CodeGenOnly instructions added in r373021, but keep the isel patterns and add COPY_TO_REGCLASS to them.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@373031 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm