R600: Reenable llvm.R600.load.input/interp.input for compatibility

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194484 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused variable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194485 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Remove unused variable."

This reverts commit r194485.

The variable is unused in some macro instantiations, but not others. We should
probably fix clang to not warn on this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194486 91177308-0d34-0410-b5e6-96231b3b80d8