Simple peephole optimizer that is activated even if not requested.

1 files changed, 53 insertions, 0 deletions

diff --git a/libevmasm/PeepholeOptimiser.h b/libevmasm/PeepholeOptimiser.h
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+++ b/libevmasm/PeepholeOptimiser.h
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+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum 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.
+
+	cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @file PeepholeOptimiser.h
+ * Performs local optimising code changes to assembly.
+ */
+#pragma once
+
+#include <vector>
+#include <cstddef>
+
+namespace dev
+{
+namespace eth
+{
+class AssemblyItem;
+using AssemblyItems = std::vector<AssemblyItem>;
+
+class PeepholeOptimisationMethod
+{
+public:
+	virtual size_t windowSize() const;
+	virtual bool apply(AssemblyItems::const_iterator _in, std::back_insert_iterator<AssemblyItems> _out);
+};
+
+class PeepholeOptimiser
+{
+public:
+	explicit PeepholeOptimiser(AssemblyItems& _items): m_items(_items) {}
+
+	bool optimise();
+
+private:
+	AssemblyItems& m_items;
+	AssemblyItems m_optimisedItems;
+};
+
+}
+}