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https://github.com/ethereum/solidity
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@ -33,8 +33,12 @@ namespace solidity
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const unsigned int CompilerUtils::dataStartOffset = 4;
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const unsigned int CompilerUtils::dataStartOffset = 4;
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unsigned CompilerUtils::loadFromMemory(unsigned _offset, Type const& _type,
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unsigned CompilerUtils::loadFromMemory(
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bool _fromCalldata, bool _padToWordBoundaries)
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unsigned _offset,
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Type const& _type,
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bool _fromCalldata,
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bool _padToWordBoundaries
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)
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{
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{
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solAssert(_type.getCategory() != Type::Category::Array, "Unable to statically load dynamic type.");
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solAssert(_type.getCategory() != Type::Category::Array, "Unable to statically load dynamic type.");
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m_context << u256(_offset);
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m_context << u256(_offset);
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@ -42,7 +46,11 @@ unsigned CompilerUtils::loadFromMemory(unsigned _offset, Type const& _type,
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}
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}
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void CompilerUtils::loadFromMemoryDynamic(
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void CompilerUtils::loadFromMemoryDynamic(
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Type const& _type, bool _fromCalldata, bool _padToWordBoundaries, bool _keepUpdatedMemoryOffset)
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Type const& _type,
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bool _fromCalldata,
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bool _padToWordBoundaries,
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bool _keepUpdatedMemoryOffset
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)
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{
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{
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solAssert(_type.getCategory() != Type::Category::Array, "Arrays not yet implemented.");
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solAssert(_type.getCategory() != Type::Category::Array, "Arrays not yet implemented.");
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if (_keepUpdatedMemoryOffset)
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if (_keepUpdatedMemoryOffset)
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@ -41,20 +41,31 @@ public:
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/// @param _fromCalldata if true, load from calldata, not from memory
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/// @param _fromCalldata if true, load from calldata, not from memory
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/// @param _padToWordBoundaries if true, assume the data is padded to word (32 byte) boundaries
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/// @param _padToWordBoundaries if true, assume the data is padded to word (32 byte) boundaries
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/// @returns the number of bytes consumed in memory.
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/// @returns the number of bytes consumed in memory.
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unsigned loadFromMemory(unsigned _offset, Type const& _type = IntegerType(256),
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unsigned loadFromMemory(
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bool _fromCalldata = false, bool _padToWordBoundaries = false);
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unsigned _offset,
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Type const& _type = IntegerType(256),
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bool _fromCalldata = false,
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bool _padToWordBoundaries = false
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);
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/// Dynamic version of @see loadFromMemory, expects the memory offset on the stack.
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/// Dynamic version of @see loadFromMemory, expects the memory offset on the stack.
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/// Stack pre: memory_offset
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/// Stack pre: memory_offset
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/// Stack post: value... (memory_offset+length)
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/// Stack post: value... (memory_offset+length)
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void loadFromMemoryDynamic(Type const& _type, bool _fromCalldata = false,
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void loadFromMemoryDynamic(
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bool _padToWordBoundaries = true, bool _keepUpdatedMemoryOffset = true);
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Type const& _type,
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bool _fromCalldata = false,
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bool _padToWordBoundaries = true,
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bool _keepUpdatedMemoryOffset = true
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);
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/// Stores data from stack in memory.
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/// Stores data from stack in memory.
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/// @param _offset offset in memory
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/// @param _offset offset in memory
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/// @param _type type of the data on the stack
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/// @param _type type of the data on the stack
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/// @param _padToWordBoundaries if true, pad the data to word (32 byte) boundaries
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/// @param _padToWordBoundaries if true, pad the data to word (32 byte) boundaries
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/// @returns the number of bytes written to memory (can be different from _bytes if
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/// @returns the number of bytes written to memory (can be different from _bytes if
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/// _padToWordBoundaries is true)
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/// _padToWordBoundaries is true)
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unsigned storeInMemory(unsigned _offset, Type const& _type = IntegerType(256), bool _padToWordBoundaries = false);
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unsigned storeInMemory(unsigned _offset,
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Type const& _type = IntegerType(256),
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bool _padToWordBoundaries = false
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);
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/// Dynamic version of @see storeInMemory, expects the memory offset below the value on the stack
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/// Dynamic version of @see storeInMemory, expects the memory offset below the value on the stack
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/// and also updates that.
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/// and also updates that.
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/// Stack pre: memory_offset value...
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/// Stack pre: memory_offset value...
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16
LValue.cpp
16
LValue.cpp
@ -242,7 +242,7 @@ StorageByteArrayElement::StorageByteArrayElement(CompilerContext& _compilerConte
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void StorageByteArrayElement::retrieveValue(SourceLocation const&, bool _remove) const
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void StorageByteArrayElement::retrieveValue(SourceLocation const&, bool _remove) const
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{
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{
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// stack: ref bytenr
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// stack: ref byte_number
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if (_remove)
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if (_remove)
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m_context << eth::Instruction::SWAP1 << eth::Instruction::SLOAD
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m_context << eth::Instruction::SWAP1 << eth::Instruction::SLOAD
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<< eth::Instruction::SWAP1 << eth::Instruction::BYTE;
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<< eth::Instruction::SWAP1 << eth::Instruction::BYTE;
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@ -255,15 +255,15 @@ void StorageByteArrayElement::storeValue(Type const&, SourceLocation const&, boo
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{
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{
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//@todo optimize this
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//@todo optimize this
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// stack: value ref bytenr
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// stack: value ref byte_number
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m_context << u256(31) << eth::Instruction::SUB << u256(0x100) << eth::Instruction::EXP;
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m_context << u256(31) << eth::Instruction::SUB << u256(0x100) << eth::Instruction::EXP;
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// stack: value ref (1<<(8*(31-bytenr)))
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// stack: value ref (1<<(8*(31-byte_number)))
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m_context << eth::Instruction::DUP2 << eth::Instruction::SLOAD;
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m_context << eth::Instruction::DUP2 << eth::Instruction::SLOAD;
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// stack: value ref (1<<(8*(31-bytenr))) old_full_value
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// stack: value ref (1<<(8*(31-byte_number))) old_full_value
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// clear byte in old value
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// clear byte in old value
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m_context << eth::Instruction::DUP2 << u256(0xff) << eth::Instruction::MUL
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m_context << eth::Instruction::DUP2 << u256(0xff) << eth::Instruction::MUL
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<< eth::Instruction::NOT << eth::Instruction::AND;
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<< eth::Instruction::NOT << eth::Instruction::AND;
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// stack: value ref (1<<(32-bytenr)) old_full_value_with_cleared_byte
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// stack: value ref (1<<(32-byte_number)) old_full_value_with_cleared_byte
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m_context << eth::Instruction::SWAP1 << eth::Instruction::DUP4 << eth::Instruction::MUL
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m_context << eth::Instruction::SWAP1 << eth::Instruction::DUP4 << eth::Instruction::MUL
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<< eth::Instruction::OR;
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<< eth::Instruction::OR;
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// stack: value ref new_full_value
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// stack: value ref new_full_value
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@ -274,13 +274,13 @@ void StorageByteArrayElement::storeValue(Type const&, SourceLocation const&, boo
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void StorageByteArrayElement::setToZero(SourceLocation const&, bool _removeReference) const
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void StorageByteArrayElement::setToZero(SourceLocation const&, bool _removeReference) const
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{
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{
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// stack: ref bytenr
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// stack: ref byte_number
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if (!_removeReference)
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if (!_removeReference)
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m_context << eth::Instruction::SWAP1 << eth::Instruction::DUP2;
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m_context << eth::Instruction::SWAP1 << eth::Instruction::DUP2;
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m_context << u256(31) << eth::Instruction::SUB << u256(0x100) << eth::Instruction::EXP;
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m_context << u256(31) << eth::Instruction::SUB << u256(0x100) << eth::Instruction::EXP;
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// stack: ref (1<<(8*(31-bytenr)))
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// stack: ref (1<<(8*(31-byte_number)))
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m_context << eth::Instruction::DUP2 << eth::Instruction::SLOAD;
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m_context << eth::Instruction::DUP2 << eth::Instruction::SLOAD;
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// stack: ref (1<<(8*(31-bytenr))) old_full_value
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// stack: ref (1<<(8*(31-byte_number))) old_full_value
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// clear byte in old value
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// clear byte in old value
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m_context << eth::Instruction::SWAP1 << u256(0xff) << eth::Instruction::MUL << eth::Instruction::AND;
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m_context << eth::Instruction::SWAP1 << u256(0xff) << eth::Instruction::MUL << eth::Instruction::AND;
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// stack: ref old_full_value_with_cleared_byte
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// stack: ref old_full_value_with_cleared_byte
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48
LValue.h
48
LValue.h
@ -61,7 +61,9 @@ public:
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/// Stores zero in the lvalue. Removes the reference from the stack if @a _removeReference is true.
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/// Stores zero in the lvalue. Removes the reference from the stack if @a _removeReference is true.
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/// @a _location is the source location of the requested operation
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/// @a _location is the source location of the requested operation
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virtual void setToZero(
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virtual void setToZero(
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SourceLocation const& _location = SourceLocation(), bool _removeReference = true) const = 0;
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SourceLocation const& _location = SourceLocation(),
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bool _removeReference = true
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) const = 0;
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protected:
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protected:
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CompilerContext& m_context;
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CompilerContext& m_context;
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@ -78,10 +80,15 @@ public:
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virtual unsigned sizeOnStack() const override { return 0; }
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virtual unsigned sizeOnStack() const override { return 0; }
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virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
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virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
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virtual void storeValue(Type const& _sourceType,
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virtual void storeValue(
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SourceLocation const& _location = SourceLocation(), bool _move = false) const override;
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Type const& _sourceType,
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SourceLocation const& _location = SourceLocation(),
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bool _move = false
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) const override;
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virtual void setToZero(
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virtual void setToZero(
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SourceLocation const& _location = SourceLocation(), bool _removeReference = true) const override;
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SourceLocation const& _location = SourceLocation(),
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bool _removeReference = true
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) const override;
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private:
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private:
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/// Base stack offset (@see CompilerContext::getBaseStackOffsetOfVariable) of the local variable.
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/// Base stack offset (@see CompilerContext::getBaseStackOffsetOfVariable) of the local variable.
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@ -101,10 +108,15 @@ public:
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/// Constructs the LValue and assumes that the storage reference is already on the stack.
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/// Constructs the LValue and assumes that the storage reference is already on the stack.
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StorageItem(CompilerContext& _compilerContext, Type const& _type);
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StorageItem(CompilerContext& _compilerContext, Type const& _type);
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virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
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virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
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virtual void storeValue(Type const& _sourceType,
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virtual void storeValue(
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SourceLocation const& _location = SourceLocation(), bool _move = false) const override;
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Type const& _sourceType,
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SourceLocation const& _location = SourceLocation(),
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bool _move = false
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) const override;
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virtual void setToZero(
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virtual void setToZero(
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SourceLocation const& _location = SourceLocation(), bool _removeReference = true) const override;
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SourceLocation const& _location = SourceLocation(),
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bool _removeReference = true
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) const override;
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private:
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private:
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/// Number of stack elements occupied by the value (not the reference).
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/// Number of stack elements occupied by the value (not the reference).
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@ -123,10 +135,15 @@ public:
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StorageByteArrayElement(CompilerContext& _compilerContext);
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StorageByteArrayElement(CompilerContext& _compilerContext);
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virtual unsigned sizeOnStack() const override { return 2; }
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virtual unsigned sizeOnStack() const override { return 2; }
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virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
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virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
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virtual void storeValue(Type const& _sourceType,
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virtual void storeValue(
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SourceLocation const& _location = SourceLocation(), bool _move = false) const override;
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Type const& _sourceType,
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SourceLocation const& _location = SourceLocation(),
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bool _move = false
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) const override;
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virtual void setToZero(
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virtual void setToZero(
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SourceLocation const& _location = SourceLocation(), bool _removeReference = true) const override;
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SourceLocation const& _location = SourceLocation(),
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bool _removeReference = true
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) const override;
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};
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};
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/**
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/**
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@ -140,10 +157,15 @@ public:
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/// Constructs the LValue, assumes that the reference to the array head is already on the stack.
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/// Constructs the LValue, assumes that the reference to the array head is already on the stack.
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StorageArrayLength(CompilerContext& _compilerContext, ArrayType const& _arrayType);
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StorageArrayLength(CompilerContext& _compilerContext, ArrayType const& _arrayType);
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virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
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virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
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virtual void storeValue(Type const& _sourceType,
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virtual void storeValue(
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SourceLocation const& _location = SourceLocation(), bool _move = false) const override;
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Type const& _sourceType,
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SourceLocation const& _location = SourceLocation(),
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bool _move = false
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) const override;
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virtual void setToZero(
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virtual void setToZero(
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SourceLocation const& _location = SourceLocation(), bool _removeReference = true) const override;
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SourceLocation const& _location = SourceLocation(),
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bool _removeReference = true
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) const override;
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private:
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private:
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ArrayType const& m_arrayType;
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ArrayType const& m_arrayType;
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