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Diffstat (limited to 'SemanticInformation.h')
-rw-r--r-- | SemanticInformation.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/SemanticInformation.h b/SemanticInformation.h new file mode 100644 index 00000000..27aa6f1a --- /dev/null +++ b/SemanticInformation.h @@ -0,0 +1,51 @@ +/* + 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 SemanticInformation.h + * @author Christian <c@ethdev.com> + * @date 2015 + * Helper to provide semantic information about assembly items. + */ + +#pragma once + + +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); +}; + +} +} |