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diff --git a/libyul/optimiser/EquivalentFunctionCombiner.h b/libyul/optimiser/EquivalentFunctionCombiner.h
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+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * Optimiser component that combines syntactically equivalent functions.
+ */
+#pragma once
+
+#include <libyul/optimiser/ASTWalker.h>
+#include <libyul/optimiser/EquivalentFunctionDetector.h>
+#include <libyul/AsmDataForward.h>
+
+namespace yul
+{
+
+/**
+ * Optimiser component that detects syntactically equivalent functions and replaces all calls to any of them by calls
+ * to one particular of them.
+ *
+ * Prerequisite: Disambiguator, Function Hoister
+ */
+class EquivalentFunctionCombiner: public ASTModifier
+{
+public:
+	static void run(Block& _ast);
+
+	using ASTModifier::operator();
+	void operator()(FunctionCall& _funCall) override;
+
+private:
+	EquivalentFunctionCombiner(std::map<YulString, FunctionDefinition const*> _duplicates): m_duplicates(std::move(_duplicates)) {}
+	std::map<YulString, FunctionDefinition const*> m_duplicates;
+};
+
+
+}