1 files changed, 57 insertions, 0 deletions
diff --git a/lldb/source/Symbol/ClangUtil.cpp b/lldb/source/Symbol/ClangUtil.cpp
new file mode 100644
index 0000000000000..86be895fadcba
--- /dev/null
+++ b/lldb/source/Symbol/ClangUtil.cpp
@@ -0,0 +1,57 @@
+//===-- ClangUtil.cpp -------------------------------------------*- C++ -*-===//
+//
+// 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
+//
+// A collection of helper methods and data structures for manipulating clang
+// types and decls.
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Symbol/ClangUtil.h"
+#include "lldb/Symbol/ClangASTContext.h"
+
+using namespace clang;
+using namespace lldb_private;
+
+bool ClangUtil::IsClangType(const CompilerType &ct) {
+  if (llvm::dyn_cast_or_null<ClangASTContext>(ct.GetTypeSystem()) == nullptr)
+    return false;
+
+  if (!ct.GetOpaqueQualType())
+    return false;
+
+  return true;
+}
+
+QualType ClangUtil::GetQualType(const CompilerType &ct) {
+  // Make sure we have a clang type before making a clang::QualType
+  if (!IsClangType(ct))
+    return QualType();
+
+  return QualType::getFromOpaquePtr(ct.GetOpaqueQualType());
+}
+
+QualType ClangUtil::GetCanonicalQualType(const CompilerType &ct) {
+  if (!IsClangType(ct))
+    return QualType();
+
+  return GetQualType(ct).getCanonicalType();
+}
+
+CompilerType ClangUtil::RemoveFastQualifiers(const CompilerType &ct) {
+  if (!IsClangType(ct))
+    return ct;
+
+  QualType qual_type(GetQualType(ct));
+  qual_type.removeLocalFastQualifiers();
+  return CompilerType(ct.GetTypeSystem(), qual_type.getAsOpaquePtr());
+}
+
+clang::TagDecl *ClangUtil::GetAsTagDecl(const CompilerType &type) {
+  clang::QualType qual_type = ClangUtil::GetCanonicalQualType(type);
+  if (qual_type.isNull())
+    return nullptr;
+
+  return qual_type->getAsTagDecl();
+}