[SYCL] Captured enum variables are incorrect inside SYCL kernels for CPU device

Signed-off-by: Vladimir Lazarev <vladimir.lazarev@intel.com>
Signed-off-by: Melanie Blower <melanie.blower@intel.com>

Author: Melanie Blower

clang/lib/Sema/SemaSYCL.cpp

@@ -513,7 +513,7 @@ CreateSYCLKernelBody(Sema &S, FunctionDecl *KernelCallerFunc, DeclContext *DC) {
         CXXMemberCallExpr *Call = CXXMemberCallExpr::Create(
             S.Context, ME, ParamStmts, ResultTy, VK, SourceLocation());
         BodyStmts.push_back(Call);
-      } else if (CRD || FieldType->isBuiltinType()) {
+      } else if (CRD || FieldType->isScalarType()) {
         // If field have built-in or a structure/class type just initialize
         // this field with corresponding kernel argument using '=' binary
         // operator. The structure/class type must be copy assignable - this
@@ -536,6 +536,8 @@ CreateSYCLKernelBody(Sema &S, FunctionDecl *KernelCallerFunc, DeclContext *DC) {
             BinaryOperator(Lhs, Rhs, BO_Assign, FieldType, VK_LValue,
                            OK_Ordinary, SourceLocation(), FPOptions());
         BodyStmts.push_back(Res);
+      } else {
+        llvm_unreachable("unsupported field type");
       }
       TargetFuncParam++;
     }

clang/test/SemaSYCL/spir-enum.cpp

@@ -0,0 +1,31 @@
+// RUN: %clang_cc1 -triple spir64-unknown-linux-sycldevice -std=c++11 -fsycl-is-device  -disable-llvm-optzns -disable-llvm-passes -S -emit-llvm -x c++ %s -o - | FileCheck %s
+
+template <typename name, typename Func>
+__attribute__((sycl_kernel)) void kernel_single_task(Func kernelFunc) {
+  kernelFunc();
+}
+
+enum enum_type: int {
+    A = 0,
+    B = 1,
+};
+
+void test(enum_type val)
+{
+  kernel_single_task<class kernel_function>([=]() {
+  //expected-warning@+1{{expression result unused}}
+  val;
+  });
+}
+
+int main() {
+
+  // CHECK: define spir_kernel void @_ZTSZ4test9enum_typeE15kernel_function(i32 %_arg_)
+
+  // CHECK: getelementptr inbounds %class.anon, %class.anon*
+  // CHECK: call spir_func void @"_ZZ4test9enum_typeENK3$_0clEv"(%class.anon* %0)
+
+
+  test( enum_type::B );
+  return 0;
+}