Index: clang/lib/Sema/SemaTemplateDeduction.cpp
===================================================================
--- clang/lib/Sema/SemaTemplateDeduction.cpp
+++ clang/lib/Sema/SemaTemplateDeduction.cpp
@@ -3886,7 +3886,7 @@
     //   "lvalue reference to A" is used in place of A for type deduction.
     if (isForwardingReference(QualType(ParamRefType, 0), FirstInnerIndex) &&
         Arg->isLValue()) {
-      if (S.getLangOpts().OpenCL)
+      if (S.getLangOpts().OpenCL  && !ArgType.hasAddressSpace())
         ArgType = S.Context.getAddrSpaceQualType(ArgType, LangAS::opencl_generic);
       ArgType = S.Context.getLValueReferenceType(ArgType);
     }