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diff --git a/llvm/include/llvm/Transforms/IPO/MergeFunctions.h b/llvm/include/llvm/Transforms/IPO/MergeFunctions.h
new file mode 100644
index 00000000000..822f0fd9918
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+++ b/llvm/include/llvm/Transforms/IPO/MergeFunctions.h
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+//===- MergeFunctions.h - Merge Identical Functions -------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass transforms simple global variables that never have their address
+// taken.  If obviously true, it marks read/write globals as constant, deletes
+// variables only stored to, etc.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_IPO_MERGEFUNCTIONS_H
+#define LLVM_TRANSFORMS_IPO_MERGEFUNCTIONS_H
+
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+class Module;
+
+/// Merge identical functions.
+class MergeFunctionsPass : public PassInfoMixin<MergeFunctionsPass> {
+public:
+  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+};
+
+} // end namespace llvm
+
+#endif // LLVM_TRANSFORMS_IPO_MERGEFUNCTIONS_H