Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 47 insertions, 0 deletions

diff --git a/clang-r353983/include/lld/Core/PassManager.h b/clang-r353983/include/lld/Core/PassManager.h
new file mode 100644
index 00000000..02499d09
--- /dev/null
+++ b/clang-r353983/include/lld/Core/PassManager.h
@@ -0,0 +1,47 @@
+//===- lld/Core/PassManager.h - Manage linker passes ----------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_CORE_PASS_MANAGER_H
+#define LLD_CORE_PASS_MANAGER_H
+
+#include "lld/Common/LLVM.h"
+#include "lld/Core/Pass.h"
+#include "llvm/Support/Error.h"
+#include <memory>
+#include <vector>
+
+namespace lld {
+class SimpleFile;
+class Pass;
+
+/// Owns and runs a collection of passes.
+///
+/// This class is currently just a container for passes and a way to run them.
+///
+/// In the future this should handle timing pass runs, running parallel passes,
+/// and validate/satisfy pass dependencies.
+class PassManager {
+public:
+  void add(std::unique_ptr<Pass> pass) {
+    _passes.push_back(std::move(pass));
+  }
+
+  llvm::Error runOnFile(SimpleFile &file) {
+    for (std::unique_ptr<Pass> &pass : _passes)
+      if (llvm::Error EC = pass->perform(file))
+        return EC;
+    return llvm::Error::success();
+  }
+
+private:
+  /// Passes in the order they should run.
+  std::vector<std::unique_ptr<Pass>> _passes;
+};
+} // end namespace lld
+
+#endif