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| author | chriseth <chris@ethereum.org> | 2018-11-08 06:52:13 +0800 |
|---|---|---|
| committer | Alex Beregszaszi <alex@rtfs.hu> | 2018-11-15 04:52:30 +0800 |
| commit | 727e3f24bc57b9470b7972fe882d60117625afe5 (patch) | |
| tree | 199d350f723cd845a9fffd7f09811f187e7afe9d /libsolidity | |
| parent | 1e4765fba7a061d8440b5bdb57ba074874c7e171 (diff) | |
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Do not perform cleanup on unsigned integers when loading from calldata.
Diffstat (limited to 'libsolidity')
| -rw-r--r-- | libsolidity/codegen/CompilerUtils.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/libsolidity/codegen/CompilerUtils.cpp b/libsolidity/codegen/CompilerUtils.cpp index 90eb74fe..a0d11017 100644 --- a/libsolidity/codegen/CompilerUtils.cpp +++ b/libsolidity/codegen/CompilerUtils.cpp @@ -1236,6 +1236,7 @@ unsigned CompilerUtils::loadFromMemoryHelper(Type const& _type, bool _fromCallda } solAssert(numBytes <= 32, "Static memory load of more than 32 bytes requested."); m_context << (_fromCalldata ? Instruction::CALLDATALOAD : Instruction::MLOAD); + bool cleanupNeeded = true; if (isExternalFunctionType) splitExternalFunctionType(true); else if (numBytes != 32) @@ -1245,10 +1246,16 @@ unsigned CompilerUtils::loadFromMemoryHelper(Type const& _type, bool _fromCallda int shiftFactor = (32 - numBytes) * 8; rightShiftNumberOnStack(shiftFactor); if (leftAligned) + { leftShiftNumberOnStack(shiftFactor); + cleanupNeeded = false; + } + else if (IntegerType const* intType = dynamic_cast<IntegerType const*>(&_type)) + if (!intType->isSigned()) + cleanupNeeded = false; } if (_fromCalldata) - convertType(_type, _type, true, false, true); + convertType(_type, _type, cleanupNeeded, false, true); return numBytes; } |