Added clang AST test for attribute propagation.

Author: rdeodhar

clang/test/SemaSYCL/parallel_for_wrapper_attr.cpp

@@ -0,0 +1,50 @@
+// RUN: %clang_cc1 %s -fsyntax-only -ast-dump -fsycl -fsycl-is-device -triple spir64 | FileCheck %s
+
+template <typename Name, typename Type>
+[[clang::sycl_kernel]] void __my_kernel__(Type bar) {
+  bar();
+}
+
+template <typename Name, typename Type> void parallel_for(Type lambda) {
+  __my_kernel__<Name>(lambda);
+}
+
+template <typename T> class Fobj {
+public:
+  Fobj() {}
+  void operator()() const {
+    auto L0 = []() [[intel::reqd_sub_group_size(4)]]{};
+    L0();
+  }
+};
+
+void invoke() {
+  Fobj<int> fobj1;
+  parallel_for<class __pf_kernel_wrapper>(fobj1);
+  Fobj<short> fobj2;
+  parallel_for<class PPP>(fobj2);
+}
+
+// CHECK-LABEL: ClassTemplateSpecializationDecl {{.*}} class Fobj definition
+// CHECK:       TemplateArgument type 'int'
+// CHECK:       CXXMethodDecl {{.*}} used operator() 'void () const'
+// CHECK:       CXXMethodDecl {{.*}} used operator() 'void () const' inline
+// CHECK-NEXT:  CompoundStmt
+// CHECK-NEXT:  IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NEXT:  IntegerLiteral {{.*}} 'int' 4
+// CHECK:       CXXOperatorCallExpr {{.*}} 'void':'void' '()'
+// CHECK:       IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NEXT:  IntegerLiteral {{.*}} 'int' 4
+// CHECK:       CXXDestructorDecl
+
+// CHECK-LABEL: ClassTemplateSpecializationDecl {{.*}} class Fobj definition
+// CHECK:       TemplateArgument type 'short'
+// CHECK:       CXXMethodDecl {{.*}} used operator() 'void () const'
+// CHECK:       CXXMethodDecl {{.*}} used operator() 'void () const' inline
+// CHECK-NEXT:  CompoundStmt
+// CHECK-NEXT:  IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NEXT:  IntegerLiteral {{.*}} 'int' 4
+// CHECK:       CXXOperatorCallExpr {{.*}} 'void':'void' '()'
+// CHECK-NOT:   IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NOT:   IntegerLiteral {{.*}} 'int' 4
+// CHECK:       CXXDestructorDecl