From b50e65437ebad535af29e84156b8b1af71f61c3d Mon Sep 17 00:00:00 2001 From: Dimitry Date: Mon, 21 Mar 2016 11:55:45 +0300 Subject: move libevmasm --- libevmasm/SemanticInformation.h | 59 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 libevmasm/SemanticInformation.h (limited to 'libevmasm/SemanticInformation.h') diff --git a/libevmasm/SemanticInformation.h b/libevmasm/SemanticInformation.h new file mode 100644 index 00000000..094f4591 --- /dev/null +++ b/libevmasm/SemanticInformation.h @@ -0,0 +1,59 @@ +/* + 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 . +*/ +/** + * @file SemanticInformation.h + * @author Christian + * @date 2015 + * Helper to provide semantic information about assembly items. + */ + +#pragma once + +#include + +namespace dev +{ +namespace eth +{ + +class AssemblyItem; + +/** + * Helper functions to provide context-independent information about assembly items. + */ +struct SemanticInformation +{ + /// @returns true if the given items starts a new block for common subexpression analysis. + static bool breaksCSEAnalysisBlock(AssemblyItem const& _item); + /// @returns true if the item is a two-argument operation whose value does not depend on the + /// order of its arguments. + static bool isCommutativeOperation(AssemblyItem const& _item); + static bool isDupInstruction(AssemblyItem const& _item); + static bool isSwapInstruction(AssemblyItem const& _item); + static bool isJumpInstruction(AssemblyItem const& _item); + static bool altersControlFlow(AssemblyItem const& _item); + /// @returns false if the value put on the stack by _item depends on anything else than + /// the information in the current block header, memory, storage or stack. + static bool isDeterministic(AssemblyItem const& _item); + /// @returns true if the given instruction modifies memory. + static bool invalidatesMemory(Instruction _instruction); + /// @returns true if the given instruction modifies storage (even indirectly). + static bool invalidatesStorage(Instruction _instruction); +}; + +} +} -- cgit