Enable queue_t and clk_event_t comparisons in C++ mode

Support queue_t and clk_event_t comparisons in C++ for OpenCL mode, to
preserve backwards compatibility with OpenCL C.

Differential Revision: https://reviews.llvm.org/D62208

llvm-svn: 361467

Author: svenvh

clang/lib/Sema/SemaExpr.cpp

@@ -10808,7 +10808,7 @@ QualType Sema::CheckCompareOperands(ExprResult &LHS, ExprResult &RHS,
     return computeResultTy();
   }
 
-  if (getLangOpts().OpenCLVersion >= 200) {
+  if (getLangOpts().OpenCLVersion >= 200 || getLangOpts().OpenCLCPlusPlus) {
     if (LHSType->isClkEventT() && RHSType->isClkEventT()) {
       return computeResultTy();
     }

clang/test/SemaOpenCL/clk_event_t.cl

@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL2.0
+// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=c++
 
 // Taken from opencl-c.h
 #define CLK_NULL_EVENT (__builtin_astype(((void*)(__SIZE_MAX__)), clk_event_t))