[clang] [clang] Factor out OpenACC part of `Sema` (PR #84184)

[Aaron Ballman via cfe-commits]

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@@ -0,0 +1,67 @@
+//===----- SemaOpenACC.h - 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 declares semantic analysis for OpenACC constructs and
+/// clauses.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_SEMA_SEMAOPENACC_H
+#define LLVM_CLANG_SEMA_SEMAOPENACC_H
+
+#include "clang/AST/DeclGroup.h"
+#include "clang/Basic/OpenACCKinds.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Sema/Ownership.h"
+
+namespace clang {
+
+class Sema;
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AaronBallman wrote:

Yeah, I envision the eventual goal of layering to be similar to that of layering elsewhere in the compiler, where it's fine for things at a higher level (SemaOpenACC, SemaOpenMP, etc) to call into things in a lower level (Sema) but not vice versa.

https://github.com/llvm/llvm-project/pull/84184