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| author | wbt <wbt@users.noreply.github.com> | 2018-01-23 22:44:37 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-01-23 22:44:37 +0800 |
| commit | 761eae2499b172334e5ea3e75573af99fae2a975 (patch) | |
| tree | 3ec324015e8d97e9b7ca43cb4dcc3c46b1b3bf31 /libevmasm/SemanticInformation.cpp | |
| parent | 7c69d88f937324b64ed8825f9e611e417421434b (diff) | |
| parent | e5def2da3d9b6cffbff42e2c9e1941831d2fe5ea (diff) | |
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Update from official repo
Diffstat (limited to 'libevmasm/SemanticInformation.cpp')
| -rw-r--r-- | libevmasm/SemanticInformation.cpp | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/libevmasm/SemanticInformation.cpp b/libevmasm/SemanticInformation.cpp index 61a6ccda..4c2290c4 100644 --- a/libevmasm/SemanticInformation.cpp +++ b/libevmasm/SemanticInformation.cpp @@ -153,6 +153,31 @@ bool SemanticInformation::isDeterministic(AssemblyItem const& _item) } } +bool SemanticInformation::movable(Instruction _instruction) +{ + // These are not really functional. + if (isDupInstruction(_instruction) || isSwapInstruction(_instruction)) + return false; + InstructionInfo info = instructionInfo(_instruction); + if (info.sideEffects) + return false; + switch (_instruction) + { + case Instruction::KECCAK256: + case Instruction::BALANCE: + case Instruction::EXTCODESIZE: + case Instruction::RETURNDATASIZE: + case Instruction::SLOAD: + case Instruction::PC: + case Instruction::MSIZE: + case Instruction::GAS: + return false; + default: + return true; + } + return true; +} + bool SemanticInformation::invalidatesMemory(Instruction _instruction) { switch (_instruction) |