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| author | chriseth <chris@ethereum.org> | 2018-05-16 20:43:57 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-05-16 20:43:57 +0800 |
| commit | e67f0147998a9e3835ed3ce8bf6a0a0c634216c5 (patch) | |
| tree | b9c0b7d41cd9f78ae3404704a888da30e767edbe /libsolidity/interface/GasEstimator.cpp | |
| parent | 124ca40dc525a987a88176c6e5170978e82fa290 (diff) | |
| parent | 1e45d3ab2e0ca688c2ae48ab657f11496ccebc12 (diff) | |
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Merge pull request #4148 from ethereum/develop
Merge develop into release for 0.4.24
Diffstat (limited to 'libsolidity/interface/GasEstimator.cpp')
| -rw-r--r-- | libsolidity/interface/GasEstimator.cpp | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/libsolidity/interface/GasEstimator.cpp b/libsolidity/interface/GasEstimator.cpp index a496cc21..a532f86e 100644 --- a/libsolidity/interface/GasEstimator.cpp +++ b/libsolidity/interface/GasEstimator.cpp @@ -136,13 +136,22 @@ GasEstimator::GasConsumption GasEstimator::functionalEstimation( ExpressionClasses& classes = state->expressionClasses(); using Id = ExpressionClasses::Id; using Ids = vector<Id>; - // div(calldataload(0), 1 << 224) equals to hashValue Id hashValue = classes.find(u256(FixedHash<4>::Arith(FixedHash<4>(dev::keccak256(_signature))))); Id calldata = classes.find(Instruction::CALLDATALOAD, Ids{classes.find(u256(0))}); - classes.forceEqual(hashValue, Instruction::DIV, Ids{ - calldata, - classes.find(u256(1) << 224) - }); + if (!m_evmVersion.hasBitwiseShifting()) + // div(calldataload(0), 1 << 224) equals to hashValue + classes.forceEqual( + hashValue, + Instruction::DIV, + Ids{calldata, classes.find(u256(1) << 224)} + ); + else + // shr(0xe0, calldataload(0)) equals to hashValue + classes.forceEqual( + hashValue, + Instruction::SHR, + Ids{classes.find(u256(0xe0)), calldata} + ); // lt(calldatasize(), 4) equals to 0 (ignore the shortcut for fallback functions) classes.forceEqual( classes.find(u256(0)), |