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codegen: add an option to CovertType so that it can truncate sign bits

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Yoichi Hirai committed 2016-11-25 15:45:16 +01:00
1 parent 56d6641086
commit ea628001d5
3 files changed
+22 -10
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libsolidity/codegen/LValue.cpp
+2 -8
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@@ -234,7 +234,7 @@ void StorageItem::storeValue(Type const& _sourceType, SourceLocation const& _loc
m_context << Instruction::SWAP1;
utils.convertType(_sourceType, _sourceType, true);
utils.convertType(*m_dataType, *m_dataType, true);
utils.convertType(*m_dataType, *m_dataType, true, true);
m_context << Instruction::SWAP1;
m_context << Instruction::SSTORE;
@@ -280,13 +280,7 @@ void StorageItem::storeValue(Type const& _sourceType, SourceLocation const& _loc
{
solAssert(m_dataType->sizeOnStack() == 1, "Invalid stack size for opaque type.");
// remove the higher order bits
utils.convertType(*m_dataType, *m_dataType, true);
m_context
<< (u256(1) << (8 * (32 - m_dataType->storageBytes())))
<< Instruction::SWAP1
<< Instruction::DUP2
<< Instruction::MUL
<< Instruction::DIV;
utils.convertType(*m_dataType, *m_dataType, true, true);
}
m_context << Instruction::MUL << Instruction::OR;
// stack: value storage_ref updated_value