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1240 lines
42 KiB
1240 lines
42 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @author Christian <c@ethdev.com>
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* @date 2014
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* Solidity AST to EVM bytecode compiler for expressions.
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*/
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#include <utility>
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#include <numeric>
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#include <boost/range/adaptor/reversed.hpp>
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#include <libevmcore/Params.h>
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#include <libdevcore/Common.h>
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#include <libdevcore/SHA3.h>
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#include <libsolidity/AST.h>
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#include <libsolidity/ExpressionCompiler.h>
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#include <libsolidity/CompilerContext.h>
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#include <libsolidity/CompilerUtils.h>
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#include <libsolidity/LValue.h>
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using namespace std;
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namespace dev
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{
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namespace solidity
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{
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void ExpressionCompiler::compile(Expression const& _expression)
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{
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_expression.accept(*this);
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}
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void ExpressionCompiler::appendStateVariableInitialization(VariableDeclaration const& _varDecl)
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{
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if (!_varDecl.getValue())
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return;
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TypePointer type = _varDecl.getValue()->getType();
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solAssert(!!type, "Type information not available.");
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CompilerContext::LocationSetter locationSetter(m_context, _varDecl);
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_varDecl.getValue()->accept(*this);
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if (_varDecl.getType()->dataStoredIn(DataLocation::Storage))
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{
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// reference type, only convert value to mobile type and do final conversion in storeValue.
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utils().convertType(*type, *type->mobileType());
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type = type->mobileType();
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}
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else
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{
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utils().convertType(*type, *_varDecl.getType());
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type = _varDecl.getType();
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}
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StorageItem(m_context, _varDecl).storeValue(*type, _varDecl.getLocation(), true);
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}
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void ExpressionCompiler::appendStateVariableAccessor(VariableDeclaration const& _varDecl)
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{
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CompilerContext::LocationSetter locationSetter(m_context, _varDecl);
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FunctionType accessorType(_varDecl);
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TypePointers const& paramTypes = accessorType.getParameterTypes();
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// retrieve the position of the variable
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auto const& location = m_context.getStorageLocationOfVariable(_varDecl);
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m_context << location.first << u256(location.second);
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TypePointer returnType = _varDecl.getType();
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for (size_t i = 0; i < paramTypes.size(); ++i)
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{
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if (auto mappingType = dynamic_cast<MappingType const*>(returnType.get()))
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{
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solAssert(CompilerUtils::freeMemoryPointer >= 0x40, "");
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// pop offset
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m_context << eth::Instruction::POP;
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// move storage offset to memory.
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utils().storeInMemory(32);
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// move key to memory.
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utils().copyToStackTop(paramTypes.size() - i, 1);
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utils().storeInMemory(0);
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m_context << u256(64) << u256(0) << eth::Instruction::SHA3;
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// push offset
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m_context << u256(0);
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returnType = mappingType->getValueType();
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}
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else if (auto arrayType = dynamic_cast<ArrayType const*>(returnType.get()))
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{
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// pop offset
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m_context << eth::Instruction::POP;
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utils().copyToStackTop(paramTypes.size() - i + 1, 1);
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ArrayUtils(m_context).accessIndex(*arrayType);
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returnType = arrayType->getBaseType();
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}
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else
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solAssert(false, "Index access is allowed only for \"mapping\" and \"array\" types.");
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}
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// remove index arguments.
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if (paramTypes.size() == 1)
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m_context << eth::Instruction::SWAP2 << eth::Instruction::POP << eth::Instruction::SWAP1;
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else if (paramTypes.size() >= 2)
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{
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m_context << eth::swapInstruction(paramTypes.size());
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m_context << eth::Instruction::POP;
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m_context << eth::swapInstruction(paramTypes.size());
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utils().popStackSlots(paramTypes.size() - 1);
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}
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unsigned retSizeOnStack = 0;
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solAssert(accessorType.getReturnParameterTypes().size() >= 1, "");
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auto const& returnTypes = accessorType.getReturnParameterTypes();
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if (StructType const* structType = dynamic_cast<StructType const*>(returnType.get()))
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{
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// remove offset
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m_context << eth::Instruction::POP;
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auto const& names = accessorType.getReturnParameterNames();
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// struct
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for (size_t i = 0; i < names.size(); ++i)
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{
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if (returnTypes[i]->getCategory() == Type::Category::Mapping)
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continue;
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if (auto arrayType = dynamic_cast<ArrayType const*>(returnTypes[i].get()))
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if (!arrayType->isByteArray())
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continue;
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pair<u256, unsigned> const& offsets = structType->getStorageOffsetsOfMember(names[i]);
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m_context << eth::Instruction::DUP1 << u256(offsets.first) << eth::Instruction::ADD << u256(offsets.second);
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TypePointer memberType = structType->getMemberType(names[i]);
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StorageItem(m_context, *memberType).retrieveValue(SourceLocation(), true);
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utils().convertType(*memberType, *returnTypes[i]);
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utils().moveToStackTop(returnTypes[i]->getSizeOnStack());
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retSizeOnStack += returnTypes[i]->getSizeOnStack();
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}
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// remove slot
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m_context << eth::Instruction::POP;
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}
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else
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{
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// simple value or array
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solAssert(returnTypes.size() == 1, "");
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StorageItem(m_context, *returnType).retrieveValue(SourceLocation(), true);
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utils().convertType(*returnType, *returnTypes.front());
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retSizeOnStack = returnTypes.front()->getSizeOnStack();
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}
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solAssert(retSizeOnStack == utils().getSizeOnStack(returnTypes), "");
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solAssert(retSizeOnStack <= 15, "Stack is too deep.");
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m_context << eth::dupInstruction(retSizeOnStack + 1);
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m_context.appendJump(eth::AssemblyItem::JumpType::OutOfFunction);
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}
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bool ExpressionCompiler::visit(Assignment const& _assignment)
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{
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CompilerContext::LocationSetter locationSetter(m_context, _assignment);
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_assignment.getRightHandSide().accept(*this);
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TypePointer type = _assignment.getRightHandSide().getType();
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if (!_assignment.getType()->dataStoredIn(DataLocation::Storage))
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{
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utils().convertType(*type, *_assignment.getType());
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type = _assignment.getType();
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}
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else
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{
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utils().convertType(*type, *type->mobileType());
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type = type->mobileType();
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}
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_assignment.getLeftHandSide().accept(*this);
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solAssert(!!m_currentLValue, "LValue not retrieved.");
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Token::Value op = _assignment.getAssignmentOperator();
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if (op != Token::Assign) // compound assignment
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{
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solAssert(_assignment.getType()->isValueType(), "Compound operators not implemented for non-value types.");
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unsigned lvalueSize = m_currentLValue->sizeOnStack();
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unsigned itemSize = _assignment.getType()->getSizeOnStack();
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if (lvalueSize > 0)
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{
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utils().copyToStackTop(lvalueSize + itemSize, itemSize);
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utils().copyToStackTop(itemSize + lvalueSize, lvalueSize);
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// value lvalue_ref value lvalue_ref
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}
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m_currentLValue->retrieveValue(_assignment.getLocation(), true);
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appendOrdinaryBinaryOperatorCode(Token::AssignmentToBinaryOp(op), *_assignment.getType());
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if (lvalueSize > 0)
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{
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solAssert(itemSize + lvalueSize <= 16, "Stack too deep, try removing local variables.");
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// value [lvalue_ref] updated_value
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for (unsigned i = 0; i < itemSize; ++i)
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m_context << eth::swapInstruction(itemSize + lvalueSize) << eth::Instruction::POP;
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}
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}
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m_currentLValue->storeValue(*type, _assignment.getLocation());
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m_currentLValue.reset();
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return false;
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}
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bool ExpressionCompiler::visit(UnaryOperation const& _unaryOperation)
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{
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CompilerContext::LocationSetter locationSetter(m_context, _unaryOperation);
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//@todo type checking and creating code for an operator should be in the same place:
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// the operator should know how to convert itself and to which types it applies, so
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// put this code together with "Type::acceptsBinary/UnaryOperator" into a class that
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// represents the operator
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if (_unaryOperation.getType()->getCategory() == Type::Category::IntegerConstant)
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{
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m_context << _unaryOperation.getType()->literalValue(nullptr);
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return false;
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}
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_unaryOperation.getSubExpression().accept(*this);
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switch (_unaryOperation.getOperator())
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{
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case Token::Not: // !
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m_context << eth::Instruction::ISZERO;
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break;
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case Token::BitNot: // ~
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m_context << eth::Instruction::NOT;
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break;
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case Token::After: // after
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m_context << eth::Instruction::TIMESTAMP << eth::Instruction::ADD;
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break;
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case Token::Delete: // delete
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solAssert(!!m_currentLValue, "LValue not retrieved.");
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m_currentLValue->setToZero(_unaryOperation.getLocation());
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m_currentLValue.reset();
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break;
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case Token::Inc: // ++ (pre- or postfix)
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case Token::Dec: // -- (pre- or postfix)
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solAssert(!!m_currentLValue, "LValue not retrieved.");
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m_currentLValue->retrieveValue(_unaryOperation.getLocation());
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if (!_unaryOperation.isPrefixOperation())
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{
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// store value for later
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solAssert(_unaryOperation.getType()->getSizeOnStack() == 1, "Stack size != 1 not implemented.");
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m_context << eth::Instruction::DUP1;
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if (m_currentLValue->sizeOnStack() > 0)
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for (unsigned i = 1 + m_currentLValue->sizeOnStack(); i > 0; --i)
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m_context << eth::swapInstruction(i);
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}
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m_context << u256(1);
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if (_unaryOperation.getOperator() == Token::Inc)
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m_context << eth::Instruction::ADD;
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else
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m_context << eth::Instruction::SWAP1 << eth::Instruction::SUB;
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// Stack for prefix: [ref...] (*ref)+-1
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// Stack for postfix: *ref [ref...] (*ref)+-1
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for (unsigned i = m_currentLValue->sizeOnStack(); i > 0; --i)
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m_context << eth::swapInstruction(i);
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m_currentLValue->storeValue(
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*_unaryOperation.getType(), _unaryOperation.getLocation(),
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!_unaryOperation.isPrefixOperation());
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m_currentLValue.reset();
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break;
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case Token::Add: // +
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// unary add, so basically no-op
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break;
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case Token::Sub: // -
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m_context << u256(0) << eth::Instruction::SUB;
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break;
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default:
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BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid unary operator: " +
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string(Token::toString(_unaryOperation.getOperator()))));
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}
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return false;
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}
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bool ExpressionCompiler::visit(BinaryOperation const& _binaryOperation)
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{
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CompilerContext::LocationSetter locationSetter(m_context, _binaryOperation);
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Expression const& leftExpression = _binaryOperation.getLeftExpression();
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Expression const& rightExpression = _binaryOperation.getRightExpression();
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Type const& commonType = _binaryOperation.getCommonType();
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Token::Value const c_op = _binaryOperation.getOperator();
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if (c_op == Token::And || c_op == Token::Or) // special case: short-circuiting
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appendAndOrOperatorCode(_binaryOperation);
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else if (commonType.getCategory() == Type::Category::IntegerConstant)
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m_context << commonType.literalValue(nullptr);
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else
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{
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bool cleanupNeeded = commonType.getCategory() == Type::Category::Integer &&
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(Token::isCompareOp(c_op) || c_op == Token::Div || c_op == Token::Mod);
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// for commutative operators, push the literal as late as possible to allow improved optimization
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auto isLiteral = [](Expression const& _e)
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{
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return dynamic_cast<Literal const*>(&_e) || _e.getType()->getCategory() == Type::Category::IntegerConstant;
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};
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bool swap = m_optimize && Token::isCommutativeOp(c_op) && isLiteral(rightExpression) && !isLiteral(leftExpression);
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if (swap)
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{
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leftExpression.accept(*this);
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utils().convertType(*leftExpression.getType(), commonType, cleanupNeeded);
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rightExpression.accept(*this);
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utils().convertType(*rightExpression.getType(), commonType, cleanupNeeded);
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}
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else
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{
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rightExpression.accept(*this);
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utils().convertType(*rightExpression.getType(), commonType, cleanupNeeded);
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leftExpression.accept(*this);
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utils().convertType(*leftExpression.getType(), commonType, cleanupNeeded);
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}
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if (Token::isCompareOp(c_op))
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appendCompareOperatorCode(c_op, commonType);
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else
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appendOrdinaryBinaryOperatorCode(c_op, commonType);
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}
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// do not visit the child nodes, we already did that explicitly
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return false;
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}
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bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
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{
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CompilerContext::LocationSetter locationSetter(m_context, _functionCall);
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using Location = FunctionType::Location;
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if (_functionCall.isTypeConversion())
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{
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solAssert(_functionCall.getArguments().size() == 1, "");
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solAssert(_functionCall.getNames().empty(), "");
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Expression const& firstArgument = *_functionCall.getArguments().front();
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firstArgument.accept(*this);
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utils().convertType(*firstArgument.getType(), *_functionCall.getType());
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return false;
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}
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FunctionTypePointer functionType;
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if (_functionCall.isStructConstructorCall())
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{
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auto const& type = dynamic_cast<TypeType const&>(*_functionCall.getExpression().getType());
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auto const& structType = dynamic_cast<StructType const&>(*type.getActualType());
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functionType = structType.constructorType();
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}
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else
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functionType = dynamic_pointer_cast<FunctionType const>(_functionCall.getExpression().getType());
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TypePointers const& parameterTypes = functionType->getParameterTypes();
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vector<ASTPointer<Expression const>> const& callArguments = _functionCall.getArguments();
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vector<ASTPointer<ASTString>> const& callArgumentNames = _functionCall.getNames();
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if (!functionType->takesArbitraryParameters())
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solAssert(callArguments.size() == parameterTypes.size(), "");
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vector<ASTPointer<Expression const>> arguments;
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if (callArgumentNames.empty())
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// normal arguments
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arguments = callArguments;
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else
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// named arguments
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for (auto const& parameterName: functionType->getParameterNames())
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{
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bool found = false;
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for (size_t j = 0; j < callArgumentNames.size() && !found; j++)
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if ((found = (parameterName == *callArgumentNames[j])))
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// we found the actual parameter position
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arguments.push_back(callArguments[j]);
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solAssert(found, "");
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}
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if (_functionCall.isStructConstructorCall())
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{
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TypeType const& type = dynamic_cast<TypeType const&>(*_functionCall.getExpression().getType());
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auto const& structType = dynamic_cast<StructType const&>(*type.getActualType());
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m_context << u256(max(32u, structType.getCalldataEncodedSize(true)));
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utils().allocateMemory();
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m_context << eth::Instruction::DUP1;
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for (unsigned i = 0; i < arguments.size(); ++i)
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{
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arguments[i]->accept(*this);
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utils().convertType(*arguments[i]->getType(), *functionType->getParameterTypes()[i]);
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utils().storeInMemoryDynamic(*functionType->getParameterTypes()[i]);
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}
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m_context << eth::Instruction::POP;
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}
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else
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{
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FunctionType const& function = *functionType;
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switch (function.getLocation())
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{
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case Location::Internal:
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{
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// Calling convention: Caller pushes return address and arguments
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// Callee removes them and pushes return values
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eth::AssemblyItem returnLabel = m_context.pushNewTag();
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for (unsigned i = 0; i < arguments.size(); ++i)
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{
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arguments[i]->accept(*this);
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utils().convertType(*arguments[i]->getType(), *function.getParameterTypes()[i]);
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}
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_functionCall.getExpression().accept(*this);
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m_context.appendJump(eth::AssemblyItem::JumpType::IntoFunction);
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m_context << returnLabel;
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unsigned returnParametersSize = CompilerUtils::getSizeOnStack(function.getReturnParameterTypes());
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// callee adds return parameters, but removes arguments and return label
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m_context.adjustStackOffset(returnParametersSize - CompilerUtils::getSizeOnStack(function.getParameterTypes()) - 1);
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// @todo for now, the return value of a function is its first return value, so remove
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// all others
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for (unsigned i = 1; i < function.getReturnParameterTypes().size(); ++i)
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utils().popStackElement(*function.getReturnParameterTypes()[i]);
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break;
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}
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case Location::External:
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case Location::CallCode:
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case Location::Bare:
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case Location::BareCallCode:
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_functionCall.getExpression().accept(*this);
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appendExternalFunctionCall(function, arguments);
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break;
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case Location::Creation:
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{
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_functionCall.getExpression().accept(*this);
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solAssert(!function.gasSet(), "Gas limit set for contract creation.");
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solAssert(function.getReturnParameterTypes().size() == 1, "");
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TypePointers argumentTypes;
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for (auto const& arg: arguments)
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{
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arg->accept(*this);
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argumentTypes.push_back(arg->getType());
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}
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ContractDefinition const& contract = dynamic_cast<ContractType const&>(
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*function.getReturnParameterTypes().front()).getContractDefinition();
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// copy the contract's code into memory
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bytes const& bytecode = m_context.getCompiledContract(contract);
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utils().fetchFreeMemoryPointer();
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m_context << u256(bytecode.size()) << eth::Instruction::DUP1;
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//@todo could be done by actually appending the Assembly, but then we probably need to compile
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// multiple times. Will revisit once external fuctions are inlined.
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m_context.appendData(bytecode);
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m_context << eth::Instruction::DUP4 << eth::Instruction::CODECOPY;
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m_context << eth::Instruction::ADD;
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utils().encodeToMemory(argumentTypes, function.getParameterTypes());
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// now on stack: memory_end_ptr
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// need: size, offset, endowment
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utils().toSizeAfterFreeMemoryPointer();
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if (function.valueSet())
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m_context << eth::dupInstruction(3);
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else
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m_context << u256(0);
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m_context << eth::Instruction::CREATE;
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if (function.valueSet())
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m_context << eth::swapInstruction(1) << eth::Instruction::POP;
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break;
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}
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case Location::SetGas:
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{
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// stack layout: contract_address function_id [gas] [value]
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_functionCall.getExpression().accept(*this);
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arguments.front()->accept(*this);
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utils().convertType(*arguments.front()->getType(), IntegerType(256), true);
|
|
// Note that function is not the original function, but the ".gas" function.
|
|
// Its values of gasSet and valueSet is equal to the original function's though.
|
|
unsigned stackDepth = (function.gasSet() ? 1 : 0) + (function.valueSet() ? 1 : 0);
|
|
if (stackDepth > 0)
|
|
m_context << eth::swapInstruction(stackDepth);
|
|
if (function.gasSet())
|
|
m_context << eth::Instruction::POP;
|
|
break;
|
|
}
|
|
case Location::SetValue:
|
|
// stack layout: contract_address function_id [gas] [value]
|
|
_functionCall.getExpression().accept(*this);
|
|
// Note that function is not the original function, but the ".value" function.
|
|
// Its values of gasSet and valueSet is equal to the original function's though.
|
|
if (function.valueSet())
|
|
m_context << eth::Instruction::POP;
|
|
arguments.front()->accept(*this);
|
|
break;
|
|
case Location::Send:
|
|
_functionCall.getExpression().accept(*this);
|
|
m_context << u256(0); // do not send gas (there still is the stipend)
|
|
arguments.front()->accept(*this);
|
|
utils().convertType(
|
|
*arguments.front()->getType(),
|
|
*function.getParameterTypes().front(), true
|
|
);
|
|
appendExternalFunctionCall(
|
|
FunctionType(
|
|
TypePointers{},
|
|
TypePointers{},
|
|
strings(),
|
|
strings(),
|
|
Location::Bare,
|
|
false,
|
|
nullptr,
|
|
true,
|
|
true
|
|
),
|
|
{}
|
|
);
|
|
break;
|
|
case Location::Suicide:
|
|
arguments.front()->accept(*this);
|
|
utils().convertType(*arguments.front()->getType(), *function.getParameterTypes().front(), true);
|
|
m_context << eth::Instruction::SUICIDE;
|
|
break;
|
|
case Location::SHA3:
|
|
{
|
|
TypePointers argumentTypes;
|
|
for (auto const& arg: arguments)
|
|
{
|
|
arg->accept(*this);
|
|
argumentTypes.push_back(arg->getType());
|
|
}
|
|
utils().fetchFreeMemoryPointer();
|
|
utils().encodeToMemory(argumentTypes, TypePointers(), function.padArguments(), true);
|
|
utils().toSizeAfterFreeMemoryPointer();
|
|
m_context << eth::Instruction::SHA3;
|
|
break;
|
|
}
|
|
case Location::Log0:
|
|
case Location::Log1:
|
|
case Location::Log2:
|
|
case Location::Log3:
|
|
case Location::Log4:
|
|
{
|
|
unsigned logNumber = int(function.getLocation()) - int(Location::Log0);
|
|
for (unsigned arg = logNumber; arg > 0; --arg)
|
|
{
|
|
arguments[arg]->accept(*this);
|
|
utils().convertType(*arguments[arg]->getType(), *function.getParameterTypes()[arg], true);
|
|
}
|
|
arguments.front()->accept(*this);
|
|
utils().fetchFreeMemoryPointer();
|
|
utils().encodeToMemory(
|
|
{arguments.front()->getType()},
|
|
{function.getParameterTypes().front()},
|
|
false,
|
|
true);
|
|
utils().toSizeAfterFreeMemoryPointer();
|
|
m_context << eth::logInstruction(logNumber);
|
|
break;
|
|
}
|
|
case Location::Event:
|
|
{
|
|
_functionCall.getExpression().accept(*this);
|
|
auto const& event = dynamic_cast<EventDefinition const&>(function.getDeclaration());
|
|
unsigned numIndexed = 0;
|
|
// All indexed arguments go to the stack
|
|
for (unsigned arg = arguments.size(); arg > 0; --arg)
|
|
if (event.getParameters()[arg - 1]->isIndexed())
|
|
{
|
|
++numIndexed;
|
|
arguments[arg - 1]->accept(*this);
|
|
utils().convertType(
|
|
*arguments[arg - 1]->getType(),
|
|
*function.getParameterTypes()[arg - 1],
|
|
true
|
|
);
|
|
}
|
|
if (!event.isAnonymous())
|
|
{
|
|
m_context << u256(h256::Arith(dev::sha3(function.externalSignature(event.getName()))));
|
|
++numIndexed;
|
|
}
|
|
solAssert(numIndexed <= 4, "Too many indexed arguments.");
|
|
// Copy all non-indexed arguments to memory (data)
|
|
// Memory position is only a hack and should be removed once we have free memory pointer.
|
|
TypePointers nonIndexedArgTypes;
|
|
TypePointers nonIndexedParamTypes;
|
|
for (unsigned arg = 0; arg < arguments.size(); ++arg)
|
|
if (!event.getParameters()[arg]->isIndexed())
|
|
{
|
|
arguments[arg]->accept(*this);
|
|
nonIndexedArgTypes.push_back(arguments[arg]->getType());
|
|
nonIndexedParamTypes.push_back(function.getParameterTypes()[arg]);
|
|
}
|
|
utils().fetchFreeMemoryPointer();
|
|
utils().encodeToMemory(nonIndexedArgTypes, nonIndexedParamTypes);
|
|
// need: topic1 ... topicn memsize memstart
|
|
utils().toSizeAfterFreeMemoryPointer();
|
|
m_context << eth::logInstruction(numIndexed);
|
|
break;
|
|
}
|
|
case Location::BlockHash:
|
|
{
|
|
arguments[0]->accept(*this);
|
|
utils().convertType(*arguments[0]->getType(), *function.getParameterTypes()[0], true);
|
|
m_context << eth::Instruction::BLOCKHASH;
|
|
break;
|
|
}
|
|
case Location::ECRecover:
|
|
case Location::SHA256:
|
|
case Location::RIPEMD160:
|
|
{
|
|
_functionCall.getExpression().accept(*this);
|
|
static const map<Location, u256> contractAddresses{{Location::ECRecover, 1},
|
|
{Location::SHA256, 2},
|
|
{Location::RIPEMD160, 3}};
|
|
m_context << contractAddresses.find(function.getLocation())->second;
|
|
for (unsigned i = function.getSizeOnStack(); i > 0; --i)
|
|
m_context << eth::swapInstruction(i);
|
|
appendExternalFunctionCall(function, arguments);
|
|
break;
|
|
}
|
|
default:
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid function type."));
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool ExpressionCompiler::visit(NewExpression const&)
|
|
{
|
|
// code is created for the function call (CREATION) only
|
|
return false;
|
|
}
|
|
|
|
void ExpressionCompiler::endVisit(MemberAccess const& _memberAccess)
|
|
{
|
|
CompilerContext::LocationSetter locationSetter(m_context, _memberAccess);
|
|
ASTString const& member = _memberAccess.getMemberName();
|
|
switch (_memberAccess.getExpression().getType()->getCategory())
|
|
{
|
|
case Type::Category::Contract:
|
|
{
|
|
bool alsoSearchInteger = false;
|
|
ContractType const& type = dynamic_cast<ContractType const&>(*_memberAccess.getExpression().getType());
|
|
if (type.isSuper())
|
|
{
|
|
solAssert(!!_memberAccess.referencedDeclaration(), "Referenced declaration not resolved.");
|
|
m_context << m_context.getSuperFunctionEntryLabel(
|
|
dynamic_cast<FunctionDefinition const&>(*_memberAccess.referencedDeclaration()),
|
|
type.getContractDefinition()
|
|
).pushTag();
|
|
}
|
|
else
|
|
{
|
|
// ordinary contract type
|
|
if (Declaration const* declaration = _memberAccess.referencedDeclaration())
|
|
{
|
|
u256 identifier;
|
|
if (auto const* variable = dynamic_cast<VariableDeclaration const*>(declaration))
|
|
identifier = FunctionType(*variable).externalIdentifier();
|
|
else if (auto const* function = dynamic_cast<FunctionDefinition const*>(declaration))
|
|
identifier = FunctionType(*function).externalIdentifier();
|
|
else
|
|
solAssert(false, "Contract member is neither variable nor function.");
|
|
utils().convertType(type, IntegerType(0, IntegerType::Modifier::Address), true);
|
|
m_context << identifier;
|
|
}
|
|
else
|
|
// not found in contract, search in members inherited from address
|
|
alsoSearchInteger = true;
|
|
}
|
|
if (!alsoSearchInteger)
|
|
break;
|
|
}
|
|
case Type::Category::Integer:
|
|
if (member == "balance")
|
|
{
|
|
utils().convertType(
|
|
*_memberAccess.getExpression().getType(),
|
|
IntegerType(0, IntegerType::Modifier::Address),
|
|
true
|
|
);
|
|
m_context << eth::Instruction::BALANCE;
|
|
}
|
|
else if ((set<string>{"send", "call", "callcode"}).count(member))
|
|
utils().convertType(
|
|
*_memberAccess.getExpression().getType(),
|
|
IntegerType(0, IntegerType::Modifier::Address),
|
|
true
|
|
);
|
|
else
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid member access to integer."));
|
|
break;
|
|
case Type::Category::Function:
|
|
solAssert(!!_memberAccess.getExpression().getType()->getMemberType(member),
|
|
"Invalid member access to function.");
|
|
break;
|
|
case Type::Category::Magic:
|
|
// we can ignore the kind of magic and only look at the name of the member
|
|
if (member == "coinbase")
|
|
m_context << eth::Instruction::COINBASE;
|
|
else if (member == "timestamp")
|
|
m_context << eth::Instruction::TIMESTAMP;
|
|
else if (member == "difficulty")
|
|
m_context << eth::Instruction::DIFFICULTY;
|
|
else if (member == "number")
|
|
m_context << eth::Instruction::NUMBER;
|
|
else if (member == "gaslimit")
|
|
m_context << eth::Instruction::GASLIMIT;
|
|
else if (member == "sender")
|
|
m_context << eth::Instruction::CALLER;
|
|
else if (member == "value")
|
|
m_context << eth::Instruction::CALLVALUE;
|
|
else if (member == "origin")
|
|
m_context << eth::Instruction::ORIGIN;
|
|
else if (member == "gas")
|
|
m_context << eth::Instruction::GAS;
|
|
else if (member == "gasprice")
|
|
m_context << eth::Instruction::GASPRICE;
|
|
else if (member == "data")
|
|
m_context << u256(0) << eth::Instruction::CALLDATASIZE;
|
|
else if (member == "sig")
|
|
m_context << u256(0) << eth::Instruction::CALLDATALOAD
|
|
<< (u256(0xffffffff) << (256 - 32)) << eth::Instruction::AND;
|
|
else
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown magic member."));
|
|
break;
|
|
case Type::Category::Struct:
|
|
{
|
|
StructType const& type = dynamic_cast<StructType const&>(*_memberAccess.getExpression().getType());
|
|
switch (type.location())
|
|
{
|
|
case DataLocation::Storage:
|
|
{
|
|
pair<u256, unsigned> const& offsets = type.getStorageOffsetsOfMember(member);
|
|
m_context << offsets.first << eth::Instruction::ADD << u256(offsets.second);
|
|
setLValueToStorageItem(_memberAccess);
|
|
break;
|
|
}
|
|
case DataLocation::Memory:
|
|
{
|
|
m_context << type.memoryOffsetOfMember(member) << eth::Instruction::ADD;
|
|
setLValue<MemoryItem>(_memberAccess, *_memberAccess.getType());
|
|
break;
|
|
}
|
|
default:
|
|
solAssert(false, "Illegal data location for struct.");
|
|
}
|
|
break;
|
|
}
|
|
case Type::Category::Enum:
|
|
{
|
|
EnumType const& type = dynamic_cast<EnumType const&>(*_memberAccess.getExpression().getType());
|
|
m_context << type.getMemberValue(_memberAccess.getMemberName());
|
|
break;
|
|
}
|
|
case Type::Category::TypeType:
|
|
{
|
|
TypeType const& type = dynamic_cast<TypeType const&>(*_memberAccess.getExpression().getType());
|
|
solAssert(
|
|
!type.getMembers().membersByName(_memberAccess.getMemberName()).empty(),
|
|
"Invalid member access to " + type.toString(false)
|
|
);
|
|
|
|
if (dynamic_cast<ContractType const*>(type.getActualType().get()))
|
|
{
|
|
auto const* function = dynamic_cast<FunctionDefinition const*>(_memberAccess.referencedDeclaration());
|
|
solAssert(!!function, "Function not found in member access");
|
|
m_context << m_context.getFunctionEntryLabel(*function).pushTag();
|
|
}
|
|
else if (auto enumType = dynamic_cast<EnumType const*>(type.getActualType().get()))
|
|
m_context << enumType->getMemberValue(_memberAccess.getMemberName());
|
|
break;
|
|
}
|
|
case Type::Category::Array:
|
|
{
|
|
solAssert(member == "length", "Illegal array member.");
|
|
auto const& type = dynamic_cast<ArrayType const&>(*_memberAccess.getExpression().getType());
|
|
if (!type.isDynamicallySized())
|
|
{
|
|
utils().popStackElement(type);
|
|
m_context << type.getLength();
|
|
}
|
|
else
|
|
switch (type.location())
|
|
{
|
|
case DataLocation::CallData:
|
|
m_context << eth::Instruction::SWAP1 << eth::Instruction::POP;
|
|
break;
|
|
case DataLocation::Storage:
|
|
setLValue<StorageArrayLength>(_memberAccess, type);
|
|
break;
|
|
case DataLocation::Memory:
|
|
m_context << eth::Instruction::MLOAD;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Member access to unknown type."));
|
|
}
|
|
}
|
|
|
|
bool ExpressionCompiler::visit(IndexAccess const& _indexAccess)
|
|
{
|
|
CompilerContext::LocationSetter locationSetter(m_context, _indexAccess);
|
|
_indexAccess.getBaseExpression().accept(*this);
|
|
|
|
Type const& baseType = *_indexAccess.getBaseExpression().getType();
|
|
if (baseType.getCategory() == Type::Category::Mapping)
|
|
{
|
|
// stack: storage_base_ref
|
|
Type const& keyType = *dynamic_cast<MappingType const&>(baseType).getKeyType();
|
|
m_context << u256(0); // memory position
|
|
solAssert(_indexAccess.getIndexExpression(), "Index expression expected.");
|
|
solAssert(keyType.getCalldataEncodedSize() <= 0x20, "Dynamic keys not yet implemented.");
|
|
appendExpressionCopyToMemory(keyType, *_indexAccess.getIndexExpression());
|
|
m_context << eth::Instruction::SWAP1;
|
|
solAssert(CompilerUtils::freeMemoryPointer >= 0x40, "");
|
|
utils().storeInMemoryDynamic(IntegerType(256));
|
|
m_context << u256(0) << eth::Instruction::SHA3;
|
|
m_context << u256(0);
|
|
setLValueToStorageItem(_indexAccess);
|
|
}
|
|
else if (baseType.getCategory() == Type::Category::Array)
|
|
{
|
|
ArrayType const& arrayType = dynamic_cast<ArrayType const&>(baseType);
|
|
solAssert(_indexAccess.getIndexExpression(), "Index expression expected.");
|
|
|
|
_indexAccess.getIndexExpression()->accept(*this);
|
|
// stack layout: <base_ref> [<length>] <index>
|
|
ArrayUtils(m_context).accessIndex(arrayType);
|
|
switch (arrayType.location())
|
|
{
|
|
case DataLocation::Storage:
|
|
if (arrayType.isByteArray())
|
|
{
|
|
solAssert(!arrayType.isString(), "Index access to string is not allowed.");
|
|
setLValue<StorageByteArrayElement>(_indexAccess);
|
|
}
|
|
else
|
|
setLValueToStorageItem(_indexAccess);
|
|
break;
|
|
case DataLocation::Memory:
|
|
setLValue<MemoryItem>(_indexAccess, *_indexAccess.getType(), !arrayType.isByteArray());
|
|
break;
|
|
case DataLocation::CallData:
|
|
//@todo if we implement this, the value in calldata has to be added to the base offset
|
|
solAssert(!arrayType.getBaseType()->isDynamicallySized(), "Nested arrays not yet implemented.");
|
|
if (arrayType.getBaseType()->isValueType())
|
|
CompilerUtils(m_context).loadFromMemoryDynamic(
|
|
*arrayType.getBaseType(),
|
|
true,
|
|
!arrayType.isByteArray(),
|
|
false
|
|
);
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
solAssert(false, "Index access only allowed for mappings or arrays.");
|
|
|
|
return false;
|
|
}
|
|
|
|
void ExpressionCompiler::endVisit(Identifier const& _identifier)
|
|
{
|
|
CompilerContext::LocationSetter locationSetter(m_context, _identifier);
|
|
Declaration const* declaration = &_identifier.getReferencedDeclaration();
|
|
if (MagicVariableDeclaration const* magicVar = dynamic_cast<MagicVariableDeclaration const*>(declaration))
|
|
{
|
|
switch (magicVar->getType()->getCategory())
|
|
{
|
|
case Type::Category::Contract:
|
|
// "this" or "super"
|
|
if (!dynamic_cast<ContractType const&>(*magicVar->getType()).isSuper())
|
|
m_context << eth::Instruction::ADDRESS;
|
|
break;
|
|
case Type::Category::Integer:
|
|
// "now"
|
|
m_context << eth::Instruction::TIMESTAMP;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
else if (FunctionDefinition const* functionDef = dynamic_cast<FunctionDefinition const*>(declaration))
|
|
m_context << m_context.getVirtualFunctionEntryLabel(*functionDef).pushTag();
|
|
else if (auto variable = dynamic_cast<VariableDeclaration const*>(declaration))
|
|
{
|
|
if (!variable->isConstant())
|
|
setLValueFromDeclaration(*declaration, _identifier);
|
|
else
|
|
variable->getValue()->accept(*this);
|
|
}
|
|
else if (dynamic_cast<ContractDefinition const*>(declaration))
|
|
{
|
|
// no-op
|
|
}
|
|
else if (dynamic_cast<EventDefinition const*>(declaration))
|
|
{
|
|
// no-op
|
|
}
|
|
else if (dynamic_cast<EnumDefinition const*>(declaration))
|
|
{
|
|
// no-op
|
|
}
|
|
else
|
|
{
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Identifier type not expected in expression context."));
|
|
}
|
|
}
|
|
|
|
void ExpressionCompiler::endVisit(Literal const& _literal)
|
|
{
|
|
CompilerContext::LocationSetter locationSetter(m_context, _literal);
|
|
TypePointer type = _literal.getType();
|
|
switch (type->getCategory())
|
|
{
|
|
case Type::Category::IntegerConstant:
|
|
case Type::Category::Bool:
|
|
m_context << type->literalValue(&_literal);
|
|
break;
|
|
case Type::Category::StringLiteral:
|
|
break; // will be done during conversion
|
|
default:
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Only integer, boolean and string literals implemented for now."));
|
|
}
|
|
}
|
|
|
|
void ExpressionCompiler::appendAndOrOperatorCode(BinaryOperation const& _binaryOperation)
|
|
{
|
|
Token::Value const c_op = _binaryOperation.getOperator();
|
|
solAssert(c_op == Token::Or || c_op == Token::And, "");
|
|
|
|
_binaryOperation.getLeftExpression().accept(*this);
|
|
m_context << eth::Instruction::DUP1;
|
|
if (c_op == Token::And)
|
|
m_context << eth::Instruction::ISZERO;
|
|
eth::AssemblyItem endLabel = m_context.appendConditionalJump();
|
|
m_context << eth::Instruction::POP;
|
|
_binaryOperation.getRightExpression().accept(*this);
|
|
m_context << endLabel;
|
|
}
|
|
|
|
void ExpressionCompiler::appendCompareOperatorCode(Token::Value _operator, Type const& _type)
|
|
{
|
|
if (_operator == Token::Equal || _operator == Token::NotEqual)
|
|
{
|
|
m_context << eth::Instruction::EQ;
|
|
if (_operator == Token::NotEqual)
|
|
m_context << eth::Instruction::ISZERO;
|
|
}
|
|
else
|
|
{
|
|
bool isSigned = false;
|
|
if (auto type = dynamic_cast<IntegerType const*>(&_type))
|
|
isSigned = type->isSigned();
|
|
|
|
switch (_operator)
|
|
{
|
|
case Token::GreaterThanOrEqual:
|
|
m_context <<
|
|
(isSigned ? eth::Instruction::SLT : eth::Instruction::LT) <<
|
|
eth::Instruction::ISZERO;
|
|
break;
|
|
case Token::LessThanOrEqual:
|
|
m_context <<
|
|
(isSigned ? eth::Instruction::SGT : eth::Instruction::GT) <<
|
|
eth::Instruction::ISZERO;
|
|
break;
|
|
case Token::GreaterThan:
|
|
m_context << (isSigned ? eth::Instruction::SGT : eth::Instruction::GT);
|
|
break;
|
|
case Token::LessThan:
|
|
m_context << (isSigned ? eth::Instruction::SLT : eth::Instruction::LT);
|
|
break;
|
|
default:
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown comparison operator."));
|
|
}
|
|
}
|
|
}
|
|
|
|
void ExpressionCompiler::appendOrdinaryBinaryOperatorCode(Token::Value _operator, Type const& _type)
|
|
{
|
|
if (Token::isArithmeticOp(_operator))
|
|
appendArithmeticOperatorCode(_operator, _type);
|
|
else if (Token::isBitOp(_operator))
|
|
appendBitOperatorCode(_operator);
|
|
else if (Token::isShiftOp(_operator))
|
|
appendShiftOperatorCode(_operator);
|
|
else
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown binary operator."));
|
|
}
|
|
|
|
void ExpressionCompiler::appendArithmeticOperatorCode(Token::Value _operator, Type const& _type)
|
|
{
|
|
IntegerType const& type = dynamic_cast<IntegerType const&>(_type);
|
|
bool const c_isSigned = type.isSigned();
|
|
|
|
switch (_operator)
|
|
{
|
|
case Token::Add:
|
|
m_context << eth::Instruction::ADD;
|
|
break;
|
|
case Token::Sub:
|
|
m_context << eth::Instruction::SUB;
|
|
break;
|
|
case Token::Mul:
|
|
m_context << eth::Instruction::MUL;
|
|
break;
|
|
case Token::Div:
|
|
m_context << (c_isSigned ? eth::Instruction::SDIV : eth::Instruction::DIV);
|
|
break;
|
|
case Token::Mod:
|
|
m_context << (c_isSigned ? eth::Instruction::SMOD : eth::Instruction::MOD);
|
|
break;
|
|
case Token::Exp:
|
|
m_context << eth::Instruction::EXP;
|
|
break;
|
|
default:
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown arithmetic operator."));
|
|
}
|
|
}
|
|
|
|
void ExpressionCompiler::appendBitOperatorCode(Token::Value _operator)
|
|
{
|
|
switch (_operator)
|
|
{
|
|
case Token::BitOr:
|
|
m_context << eth::Instruction::OR;
|
|
break;
|
|
case Token::BitAnd:
|
|
m_context << eth::Instruction::AND;
|
|
break;
|
|
case Token::BitXor:
|
|
m_context << eth::Instruction::XOR;
|
|
break;
|
|
default:
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown bit operator."));
|
|
}
|
|
}
|
|
|
|
void ExpressionCompiler::appendShiftOperatorCode(Token::Value _operator)
|
|
{
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Shift operators not yet implemented."));
|
|
switch (_operator)
|
|
{
|
|
case Token::SHL:
|
|
break;
|
|
case Token::SAR:
|
|
break;
|
|
default:
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown shift operator."));
|
|
}
|
|
}
|
|
|
|
void ExpressionCompiler::appendExternalFunctionCall(
|
|
FunctionType const& _functionType,
|
|
vector<ASTPointer<Expression const>> const& _arguments
|
|
)
|
|
{
|
|
solAssert(_functionType.takesArbitraryParameters() ||
|
|
_arguments.size() == _functionType.getParameterTypes().size(), "");
|
|
|
|
// Assumed stack content here:
|
|
// <stack top>
|
|
// value [if _functionType.valueSet()]
|
|
// gas [if _functionType.gasSet()]
|
|
// function identifier [unless bare]
|
|
// contract address
|
|
|
|
unsigned gasValueSize = (_functionType.gasSet() ? 1 : 0) + (_functionType.valueSet() ? 1 : 0);
|
|
|
|
unsigned contractStackPos = m_context.currentToBaseStackOffset(1 + gasValueSize + (_functionType.isBareCall() ? 0 : 1));
|
|
unsigned gasStackPos = m_context.currentToBaseStackOffset(gasValueSize);
|
|
unsigned valueStackPos = m_context.currentToBaseStackOffset(1);
|
|
|
|
using FunctionKind = FunctionType::Location;
|
|
FunctionKind funKind = _functionType.getLocation();
|
|
bool returnSuccessCondition = funKind == FunctionKind::Bare || funKind == FunctionKind::BareCallCode;
|
|
|
|
//@todo only return the first return value for now
|
|
Type const* firstReturnType =
|
|
_functionType.getReturnParameterTypes().empty() ?
|
|
nullptr :
|
|
_functionType.getReturnParameterTypes().front().get();
|
|
unsigned retSize = 0;
|
|
if (returnSuccessCondition)
|
|
retSize = 0; // return value actually is success condition
|
|
else if (firstReturnType)
|
|
{
|
|
retSize = firstReturnType->getCalldataEncodedSize();
|
|
solAssert(retSize > 0, "Unable to return dynamic type from external call.");
|
|
}
|
|
|
|
// Evaluate arguments.
|
|
TypePointers argumentTypes;
|
|
bool manualFunctionId =
|
|
(funKind == FunctionKind::Bare || funKind == FunctionKind::BareCallCode) &&
|
|
!_arguments.empty() &&
|
|
_arguments.front()->getType()->mobileType()->getCalldataEncodedSize(false) ==
|
|
CompilerUtils::dataStartOffset;
|
|
if (manualFunctionId)
|
|
{
|
|
// If we have a BareCall or BareCallCode and the first type has exactly 4 bytes, use it as
|
|
// function identifier.
|
|
_arguments.front()->accept(*this);
|
|
utils().convertType(
|
|
*_arguments.front()->getType(),
|
|
IntegerType(8 * CompilerUtils::dataStartOffset),
|
|
true
|
|
);
|
|
for (unsigned i = 0; i < gasValueSize; ++i)
|
|
m_context << eth::swapInstruction(gasValueSize - i);
|
|
gasStackPos++;
|
|
valueStackPos++;
|
|
}
|
|
for (size_t i = manualFunctionId ? 1 : 0; i < _arguments.size(); ++i)
|
|
{
|
|
_arguments[i]->accept(*this);
|
|
argumentTypes.push_back(_arguments[i]->getType());
|
|
}
|
|
|
|
// Copy function identifier to memory.
|
|
utils().fetchFreeMemoryPointer();
|
|
if (!_functionType.isBareCall() || manualFunctionId)
|
|
{
|
|
m_context << eth::dupInstruction(2 + gasValueSize + CompilerUtils::getSizeOnStack(argumentTypes));
|
|
utils().storeInMemoryDynamic(IntegerType(8 * CompilerUtils::dataStartOffset), false);
|
|
}
|
|
// If the function takes arbitrary parameters, copy dynamic length data in place.
|
|
// Move argumenst to memory, will not update the free memory pointer (but will update the memory
|
|
// pointer on the stack).
|
|
utils().encodeToMemory(
|
|
argumentTypes,
|
|
_functionType.getParameterTypes(),
|
|
_functionType.padArguments(),
|
|
_functionType.takesArbitraryParameters()
|
|
);
|
|
|
|
// Stack now:
|
|
// <stack top>
|
|
// input_memory_end
|
|
// value [if _functionType.valueSet()]
|
|
// gas [if _functionType.gasSet()]
|
|
// function identifier [unless bare]
|
|
// contract address
|
|
|
|
// Output data will replace input data.
|
|
// put on stack: <size of output> <memory pos of output> <size of input> <memory pos of input>
|
|
m_context << u256(retSize);
|
|
utils().fetchFreeMemoryPointer();
|
|
m_context << eth::Instruction::DUP1 << eth::Instruction::DUP4 << eth::Instruction::SUB;
|
|
m_context << eth::Instruction::DUP2;
|
|
|
|
// CALL arguments: outSize, outOff, inSize, inOff (already present up to here)
|
|
// value, addr, gas (stack top)
|
|
if (_functionType.valueSet())
|
|
m_context << eth::dupInstruction(m_context.baseToCurrentStackOffset(valueStackPos));
|
|
else
|
|
m_context << u256(0);
|
|
m_context << eth::dupInstruction(m_context.baseToCurrentStackOffset(contractStackPos));
|
|
|
|
if (_functionType.gasSet())
|
|
m_context << eth::dupInstruction(m_context.baseToCurrentStackOffset(gasStackPos));
|
|
else
|
|
// send all gas except the amount needed to execute "SUB" and "CALL"
|
|
// @todo this retains too much gas for now, needs to be fine-tuned.
|
|
m_context <<
|
|
u256(eth::c_callGas + 10 + (_functionType.valueSet() ? eth::c_callValueTransferGas : 0) + eth::c_callNewAccountGas) <<
|
|
eth::Instruction::GAS <<
|
|
eth::Instruction::SUB;
|
|
if (funKind == FunctionKind::CallCode || funKind == FunctionKind::BareCallCode)
|
|
m_context << eth::Instruction::CALLCODE;
|
|
else
|
|
m_context << eth::Instruction::CALL;
|
|
|
|
unsigned remainsSize =
|
|
2 + // contract address, input_memory_end
|
|
_functionType.valueSet() +
|
|
_functionType.gasSet() +
|
|
(!_functionType.isBareCall() || manualFunctionId);
|
|
|
|
if (returnSuccessCondition)
|
|
m_context << eth::swapInstruction(remainsSize);
|
|
else
|
|
{
|
|
//Propagate error condition (if CALL pushes 0 on stack).
|
|
m_context << eth::Instruction::ISZERO;
|
|
m_context.appendConditionalJumpTo(m_context.errorTag());
|
|
}
|
|
|
|
utils().popStackSlots(remainsSize);
|
|
|
|
if (returnSuccessCondition)
|
|
{
|
|
// already there
|
|
}
|
|
else if (funKind == FunctionKind::RIPEMD160)
|
|
{
|
|
// fix: built-in contract returns right-aligned data
|
|
utils().fetchFreeMemoryPointer();
|
|
utils().loadFromMemoryDynamic(IntegerType(160), false, true, false);
|
|
utils().convertType(IntegerType(160), FixedBytesType(20));
|
|
}
|
|
else if (firstReturnType)
|
|
{
|
|
//@todo manually update free memory pointer if we accept returning memory-stored objects
|
|
utils().fetchFreeMemoryPointer();
|
|
utils().loadFromMemoryDynamic(*firstReturnType, false, true, false);
|
|
|
|
}
|
|
}
|
|
|
|
void ExpressionCompiler::appendExpressionCopyToMemory(Type const& _expectedType, Expression const& _expression)
|
|
{
|
|
solAssert(_expectedType.isValueType(), "Not implemented for non-value types.");
|
|
_expression.accept(*this);
|
|
utils().convertType(*_expression.getType(), _expectedType, true);
|
|
utils().storeInMemoryDynamic(_expectedType);
|
|
}
|
|
|
|
void ExpressionCompiler::setLValueFromDeclaration(Declaration const& _declaration, Expression const& _expression)
|
|
{
|
|
if (m_context.isLocalVariable(&_declaration))
|
|
setLValue<StackVariable>(_expression, _declaration);
|
|
else if (m_context.isStateVariable(&_declaration))
|
|
setLValue<StorageItem>(_expression, _declaration);
|
|
else
|
|
BOOST_THROW_EXCEPTION(InternalCompilerError()
|
|
<< errinfo_sourceLocation(_expression.getLocation())
|
|
<< errinfo_comment("Identifier type not supported or identifier not found."));
|
|
}
|
|
|
|
void ExpressionCompiler::setLValueToStorageItem(Expression const& _expression)
|
|
{
|
|
setLValue<StorageItem>(_expression, *_expression.getType());
|
|
}
|
|
|
|
CompilerUtils ExpressionCompiler::utils()
|
|
{
|
|
return CompilerUtils(m_context);
|
|
}
|
|
|
|
}
|
|
}
|
|
|