[OpenCL] Clang diagnostics allow reporting C++ for OpenCL version.

Some Clang diagnostics could only report OpenCL C version. Because
C++ for OpenCL can be used as an alternative to OpenCL C, the text
for diagnostics should reflect that.

Desrciptions modified for these diagnostics:
`err_opencl_unknown_type_specifier`
`warn_option_invalid_ocl_version`
`err_attribute_requires_opencl_version`
`warn_opencl_attr_deprecated_ignored`
`ext_opencl_ext_vector_type_rgba_selector`

Differential Revision: https://reviews.llvm.org/D107648

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/lib/Basic/LangOptions.cpp b/clang/lib/Basic/LangOptions.cpp
index bebf317..169b679 100644
--- a/clang/lib/Basic/LangOptions.cpp
+++ b/clang/lib/Basic/LangOptions.cpp
@@ -56,6 +56,16 @@ void LangOptions::remapPathPrefix(SmallString<256> &Path) const {
       break;
 }
 
+std::string LangOptions::getOpenCLVersionString() const {
+  std::string Result;
+  {
+    llvm::raw_string_ostream Out(Result);
+    Out << (OpenCLCPlusPlus ? "C++ for OpenCL" : "OpenCL C") << " version "
+        << getOpenCLVersionTuple().getAsString();
+  }
+  return Result;
+}
+
 FPOptions FPOptions::defaultWithoutTrailingStorage(const LangOptions &LO) {
   FPOptions result(LO);
   return result;