[OpenCL] Do not generate "kernel_arg_type_qual" metadata for non-pointer args

Summary:
"kernel_arg_type_qual" metadata should contain const/volatile/restrict
tags only for pointer types to match the corresponding requirement of
the OpenCL specification.

OpenCL 2.0 spec 5.9.3 Kernel Object Queries:

CL_KERNEL_ARG_TYPE_VOLATILE is returned if the argument is a pointer
and the referenced type is declared with the volatile qualifier.
[...]
Similarly, CL_KERNEL_ARG_TYPE_CONST is returned if the argument is a
pointer and the referenced type is declared with the restrict or const
qualifier.
[...]
CL_KERNEL_ARG_TYPE_RESTRICT will be returned if the pointer type is
marked restrict.

Reviewers: Anastasia, cfe-commits

Reviewed By: Anastasia

Subscribers: bader, yaxunl

Differential Revision: https://reviews.llvm.org/D31321

llvm-svn: 299192

1 files changed, 0 insertions, 5 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index d1c068eda9a..346679b08f6 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -610,11 +610,6 @@ static void GenOpenCLArgMetadata(const FunctionDecl *FD, llvm::Function *Fn,
 
       argBaseTypeNames.push_back(llvm::MDString::get(Context, baseTypeName));
 
-      // Get argument type qualifiers:
-      if (ty.isConstQualified())
-        typeQuals = "const";
-      if (ty.isVolatileQualified())
-        typeQuals += typeQuals.empty() ? "volatile" : " volatile";
       if (isPipe)
         typeQuals = "pipe";
     }