================
@@ -0,0 +1,132 @@
+//===--- SemaOpenACC.cpp - Semantic Analysis for OpenACC constructs 
-------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM 
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// This file implements semantic analysis for OpenACC constructs and
+/// clauses.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/DiagnosticSema.h"
+#include "clang/Basic/OpenACCKinds.h"
+#include "clang/Sema/Sema.h"
+
+using namespace clang;
+
+namespace {
+bool DiagnoseConstructAppertainment(Sema &S, OpenACCDirectiveKind K,
+                                    SourceLocation StartLoc, bool IsStmt) {
+  switch (K) {
+  default:
+  case OpenACCDirectiveKind::Invalid:
+    // Nothing to do here, both invalid and unimplemented don't really need to
+    // do anything.
+    break;
----------------
erichkeane wrote:

No, that would just end up crashing, we're calling into the 'act on start' even 
when invalid, which should allow us to handle 'state' of bad pragmas better, so 
'invalid' has to get through here without causing problems.  The intent is that 
we wont create an AST node here, but still allow 'checking' of everything else.

https://github.com/llvm/llvm-project/pull/81659
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