diff options
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) |