mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
1752 lines
56 KiB
C++
1752 lines
56 KiB
C++
/*
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This file is part of solidity.
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solidity 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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solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Component that translates Solidity code into Yul at statement level and below.
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*/
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#include <libsolidity/codegen/ir/IRGeneratorForStatements.h>
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#include <libsolidity/codegen/ABIFunctions.h>
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#include <libsolidity/codegen/ir/IRGenerationContext.h>
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#include <libsolidity/codegen/ir/IRLValue.h>
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#include <libsolidity/codegen/ir/IRVariable.h>
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#include <libsolidity/codegen/YulUtilFunctions.h>
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#include <libsolidity/codegen/ABIFunctions.h>
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#include <libsolidity/codegen/CompilerUtils.h>
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#include <libsolidity/ast/TypeProvider.h>
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#include <libevmasm/GasMeter.h>
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#include <libyul/AsmPrinter.h>
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#include <libyul/AsmData.h>
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#include <libyul/Dialect.h>
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#include <libyul/optimiser/ASTCopier.h>
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#include <libsolutil/Whiskers.h>
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#include <libsolutil/StringUtils.h>
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#include <libsolutil/Keccak256.h>
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#include <libsolutil/Visitor.h>
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#include <boost/range/adaptor/transformed.hpp>
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using namespace std;
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using namespace solidity;
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using namespace solidity::util;
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using namespace solidity::frontend;
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using namespace std::string_literals;
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namespace
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{
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struct CopyTranslate: public yul::ASTCopier
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{
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using ExternalRefsMap = std::map<yul::Identifier const*, InlineAssemblyAnnotation::ExternalIdentifierInfo>;
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CopyTranslate(yul::Dialect const& _dialect, IRGenerationContext& _context, ExternalRefsMap const& _references):
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m_dialect(_dialect), m_context(_context), m_references(_references) {}
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using ASTCopier::operator();
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yul::Expression operator()(yul::Identifier const& _identifier) override
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{
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if (m_references.count(&_identifier))
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{
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auto const& reference = m_references.at(&_identifier);
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auto const varDecl = dynamic_cast<VariableDeclaration const*>(reference.declaration);
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solUnimplementedAssert(varDecl, "");
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if (reference.isOffset || reference.isSlot)
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{
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solAssert(reference.isOffset != reference.isSlot, "");
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pair<u256, unsigned> slot_offset = m_context.storageLocationOfVariable(*varDecl);
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string const value = reference.isSlot ?
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slot_offset.first.str() :
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to_string(slot_offset.second);
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return yul::Literal{
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_identifier.location,
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yul::LiteralKind::Number,
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yul::YulString{value},
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{}
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};
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}
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}
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return ASTCopier::operator()(_identifier);
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}
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yul::YulString translateIdentifier(yul::YulString _name) override
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{
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// Strictly, the dialect used by inline assembly (m_dialect) could be different
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// from the Yul dialect we are compiling to. So we are assuming here that the builtin
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// functions are identical. This should not be a problem for now since everything
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// is EVM anyway.
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if (m_dialect.builtin(_name))
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return _name;
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else
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return yul::YulString{"usr$" + _name.str()};
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}
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yul::Identifier translate(yul::Identifier const& _identifier) override
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{
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if (!m_references.count(&_identifier))
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return ASTCopier::translate(_identifier);
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auto const& reference = m_references.at(&_identifier);
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auto const varDecl = dynamic_cast<VariableDeclaration const*>(reference.declaration);
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solUnimplementedAssert(varDecl, "");
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solAssert(
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reference.isOffset == false && reference.isSlot == false,
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"Should not be called for offset/slot"
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);
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return yul::Identifier{
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_identifier.location,
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yul::YulString{m_context.localVariable(*varDecl).name()}
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};
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}
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private:
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yul::Dialect const& m_dialect;
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IRGenerationContext& m_context;
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ExternalRefsMap const& m_references;
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};
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}
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string IRGeneratorForStatements::code() const
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{
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solAssert(!m_currentLValue, "LValue not reset!");
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return m_code.str();
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}
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void IRGeneratorForStatements::initializeStateVar(VariableDeclaration const& _varDecl)
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{
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solAssert(m_context.isStateVariable(_varDecl), "Must be a state variable.");
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solAssert(!_varDecl.isConstant(), "");
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solAssert(!_varDecl.immutable(), "");
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if (_varDecl.value())
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{
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_varDecl.value()->accept(*this);
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writeToLValue(IRLValue{
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*_varDecl.annotation().type,
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IRLValue::Storage{
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util::toCompactHexWithPrefix(m_context.storageLocationOfVariable(_varDecl).first),
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m_context.storageLocationOfVariable(_varDecl).second
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}
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}, *_varDecl.value());
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}
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}
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void IRGeneratorForStatements::initializeLocalVar(VariableDeclaration const& _varDecl)
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{
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solAssert(m_context.isLocalVariable(_varDecl), "Must be a local variable.");
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auto const* type = _varDecl.type();
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if (auto const* refType = dynamic_cast<ReferenceType const*>(type))
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if (refType->dataStoredIn(DataLocation::Storage) && refType->isPointer())
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return;
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IRVariable zero = zeroValue(*type);
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assign(m_context.localVariable(_varDecl), zero);
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}
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void IRGeneratorForStatements::endVisit(VariableDeclarationStatement const& _varDeclStatement)
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{
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if (Expression const* expression = _varDeclStatement.initialValue())
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{
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if (_varDeclStatement.declarations().size() > 1)
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{
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auto const* tupleType = dynamic_cast<TupleType const*>(expression->annotation().type);
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solAssert(tupleType, "Expected expression of tuple type.");
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solAssert(_varDeclStatement.declarations().size() == tupleType->components().size(), "Invalid number of tuple components.");
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for (size_t i = 0; i < _varDeclStatement.declarations().size(); ++i)
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if (auto const& decl = _varDeclStatement.declarations()[i])
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{
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solAssert(tupleType->components()[i], "");
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define(m_context.addLocalVariable(*decl), IRVariable(*expression).tupleComponent(i));
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}
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}
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else
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{
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VariableDeclaration const& varDecl = *_varDeclStatement.declarations().front();
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define(m_context.addLocalVariable(varDecl), *expression);
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}
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}
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else
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for (auto const& decl: _varDeclStatement.declarations())
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if (decl)
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{
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declare(m_context.addLocalVariable(*decl));
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initializeLocalVar(*decl);
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}
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}
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bool IRGeneratorForStatements::visit(Conditional const& _conditional)
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{
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_conditional.condition().accept(*this);
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string condition = expressionAsType(_conditional.condition(), *TypeProvider::boolean());
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declare(_conditional);
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m_code << "switch " << condition << "\n" "case 0 {\n";
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_conditional.falseExpression().accept(*this);
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assign(_conditional, _conditional.falseExpression());
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m_code << "}\n" "default {\n";
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_conditional.trueExpression().accept(*this);
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assign(_conditional, _conditional.trueExpression());
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m_code << "}\n";
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return false;
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}
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bool IRGeneratorForStatements::visit(Assignment const& _assignment)
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{
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_assignment.rightHandSide().accept(*this);
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Type const* intermediateType = type(_assignment.rightHandSide()).closestTemporaryType(
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&type(_assignment.leftHandSide())
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);
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IRVariable value = convert(_assignment.rightHandSide(), *intermediateType);
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_assignment.leftHandSide().accept(*this);
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solAssert(!!m_currentLValue, "LValue not retrieved.");
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if (_assignment.assignmentOperator() != Token::Assign)
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{
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solAssert(type(_assignment.leftHandSide()) == *intermediateType, "");
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solAssert(intermediateType->isValueType(), "Compound operators only available for value types.");
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IRVariable leftIntermediate = readFromLValue(*m_currentLValue);
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m_code << value.name() << " := " << binaryOperation(
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TokenTraits::AssignmentToBinaryOp(_assignment.assignmentOperator()),
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*intermediateType,
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leftIntermediate.name(),
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value.name()
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);
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}
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writeToLValue(*m_currentLValue, value);
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m_currentLValue.reset();
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if (*_assignment.annotation().type != *TypeProvider::emptyTuple())
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define(_assignment, value);
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return false;
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}
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bool IRGeneratorForStatements::visit(TupleExpression const& _tuple)
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{
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if (_tuple.isInlineArray())
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solUnimplementedAssert(false, "");
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else
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{
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bool lValueRequested = _tuple.annotation().lValueRequested;
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if (lValueRequested)
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solAssert(!m_currentLValue, "");
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if (_tuple.components().size() == 1)
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{
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solAssert(_tuple.components().front(), "");
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_tuple.components().front()->accept(*this);
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if (lValueRequested)
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solAssert(!!m_currentLValue, "");
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else
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define(_tuple, *_tuple.components().front());
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}
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else
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{
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vector<optional<IRLValue>> lvalues;
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for (size_t i = 0; i < _tuple.components().size(); ++i)
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if (auto const& component = _tuple.components()[i])
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{
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component->accept(*this);
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if (lValueRequested)
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{
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solAssert(!!m_currentLValue, "");
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lvalues.emplace_back(std::move(m_currentLValue));
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m_currentLValue.reset();
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}
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else
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define(IRVariable(_tuple).tupleComponent(i), *component);
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}
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else if (lValueRequested)
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lvalues.emplace_back();
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if (_tuple.annotation().lValueRequested)
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m_currentLValue.emplace(IRLValue{
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*_tuple.annotation().type,
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IRLValue::Tuple{std::move(lvalues)}
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});
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}
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}
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return false;
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}
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bool IRGeneratorForStatements::visit(IfStatement const& _ifStatement)
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{
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_ifStatement.condition().accept(*this);
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string condition = expressionAsType(_ifStatement.condition(), *TypeProvider::boolean());
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if (_ifStatement.falseStatement())
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{
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m_code << "switch " << condition << "\n" "case 0 {\n";
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_ifStatement.falseStatement()->accept(*this);
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m_code << "}\n" "default {\n";
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}
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else
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m_code << "if " << condition << " {\n";
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_ifStatement.trueStatement().accept(*this);
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m_code << "}\n";
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return false;
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}
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bool IRGeneratorForStatements::visit(ForStatement const& _forStatement)
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{
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generateLoop(
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_forStatement.body(),
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_forStatement.condition(),
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_forStatement.initializationExpression(),
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_forStatement.loopExpression()
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);
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return false;
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}
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bool IRGeneratorForStatements::visit(WhileStatement const& _whileStatement)
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{
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generateLoop(
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_whileStatement.body(),
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&_whileStatement.condition(),
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nullptr,
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nullptr,
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_whileStatement.isDoWhile()
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);
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return false;
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}
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bool IRGeneratorForStatements::visit(Continue const&)
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{
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m_code << "continue\n";
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return false;
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}
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bool IRGeneratorForStatements::visit(Break const&)
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{
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m_code << "break\n";
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return false;
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}
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void IRGeneratorForStatements::endVisit(Return const& _return)
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{
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if (Expression const* value = _return.expression())
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{
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solAssert(_return.annotation().functionReturnParameters, "Invalid return parameters pointer.");
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vector<ASTPointer<VariableDeclaration>> const& returnParameters =
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_return.annotation().functionReturnParameters->parameters();
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if (returnParameters.size() > 1)
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for (size_t i = 0; i < returnParameters.size(); ++i)
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assign(m_context.localVariable(*returnParameters[i]), IRVariable(*value).tupleComponent(i));
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else if (returnParameters.size() == 1)
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assign(m_context.localVariable(*returnParameters.front()), *value);
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}
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m_code << "leave\n";
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}
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void IRGeneratorForStatements::endVisit(UnaryOperation const& _unaryOperation)
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{
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Type const& resultType = type(_unaryOperation);
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Token const op = _unaryOperation.getOperator();
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if (op == Token::Delete)
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{
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solAssert(!!m_currentLValue, "LValue not retrieved.");
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std::visit(
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util::GenericVisitor{
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[&](IRLValue::Storage const& _storage) {
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m_code <<
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m_utils.storageSetToZeroFunction(m_currentLValue->type) <<
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"(" <<
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_storage.slot <<
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", " <<
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_storage.offsetString() <<
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")\n";
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m_currentLValue.reset();
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},
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[&](auto const&) {
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IRVariable zeroValue(m_context.newYulVariable(), m_currentLValue->type);
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define(zeroValue) << m_utils.zeroValueFunction(m_currentLValue->type) << "()\n";
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writeToLValue(*m_currentLValue, zeroValue);
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m_currentLValue.reset();
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}
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},
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m_currentLValue->kind
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);
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}
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else if (resultType.category() == Type::Category::RationalNumber)
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define(_unaryOperation) << formatNumber(resultType.literalValue(nullptr)) << "\n";
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else if (resultType.category() == Type::Category::Integer)
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{
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solAssert(resultType == type(_unaryOperation.subExpression()), "Result type doesn't match!");
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if (op == Token::Inc || op == Token::Dec)
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{
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solAssert(!!m_currentLValue, "LValue not retrieved.");
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IRVariable modifiedValue(m_context.newYulVariable(), resultType);
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IRVariable originalValue = readFromLValue(*m_currentLValue);
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define(modifiedValue) <<
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(op == Token::Inc ?
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m_utils.incrementCheckedFunction(resultType) :
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m_utils.decrementCheckedFunction(resultType)
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) <<
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"(" <<
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originalValue.name() <<
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")\n";
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writeToLValue(*m_currentLValue, modifiedValue);
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m_currentLValue.reset();
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define(_unaryOperation, _unaryOperation.isPrefixOperation() ? modifiedValue : originalValue);
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}
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else if (op == Token::BitNot)
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appendSimpleUnaryOperation(_unaryOperation, _unaryOperation.subExpression());
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else if (op == Token::Add)
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// According to SyntaxChecker...
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solAssert(false, "Use of unary + is disallowed.");
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else if (op == Token::Sub)
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{
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IntegerType const& intType = *dynamic_cast<IntegerType const*>(&resultType);
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define(_unaryOperation) <<
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m_utils.negateNumberCheckedFunction(intType) <<
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"(" <<
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IRVariable(_unaryOperation.subExpression()).name() <<
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")\n";
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}
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else
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solUnimplementedAssert(false, "Unary operator not yet implemented");
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}
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else if (resultType.category() == Type::Category::Bool)
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{
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solAssert(
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_unaryOperation.getOperator() != Token::BitNot,
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"Bitwise Negation can't be done on bool!"
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);
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appendSimpleUnaryOperation(_unaryOperation, _unaryOperation.subExpression());
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}
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else
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solUnimplementedAssert(false, "Unary operator not yet implemented");
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}
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bool IRGeneratorForStatements::visit(BinaryOperation const& _binOp)
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{
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solAssert(!!_binOp.annotation().commonType, "");
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TypePointer commonType = _binOp.annotation().commonType;
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langutil::Token op = _binOp.getOperator();
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if (op == Token::And || op == Token::Or)
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{
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// This can short-circuit!
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appendAndOrOperatorCode(_binOp);
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return false;
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}
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_binOp.leftExpression().accept(*this);
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_binOp.rightExpression().accept(*this);
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if (commonType->category() == Type::Category::RationalNumber)
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define(_binOp) << toCompactHexWithPrefix(commonType->literalValue(nullptr)) << "\n";
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else if (TokenTraits::isCompareOp(op))
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{
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if (auto type = dynamic_cast<FunctionType const*>(commonType))
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{
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solAssert(op == Token::Equal || op == Token::NotEqual, "Invalid function pointer comparison!");
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solAssert(type->kind() != FunctionType::Kind::External, "External function comparison not allowed!");
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}
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solAssert(commonType->isValueType(), "");
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bool isSigned = false;
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if (auto type = dynamic_cast<IntegerType const*>(commonType))
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isSigned = type->isSigned();
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string args =
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expressionAsType(_binOp.leftExpression(), *commonType) +
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", " +
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expressionAsType(_binOp.rightExpression(), *commonType);
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|
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string expr;
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if (op == Token::Equal)
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expr = "eq(" + move(args) + ")";
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else if (op == Token::NotEqual)
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expr = "iszero(eq(" + move(args) + "))";
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else if (op == Token::GreaterThanOrEqual)
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expr = "iszero(" + string(isSigned ? "slt(" : "lt(") + move(args) + "))";
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else if (op == Token::LessThanOrEqual)
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expr = "iszero(" + string(isSigned ? "sgt(" : "gt(") + move(args) + "))";
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else if (op == Token::GreaterThan)
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expr = (isSigned ? "sgt(" : "gt(") + move(args) + ")";
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else if (op == Token::LessThan)
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expr = (isSigned ? "slt(" : "lt(") + move(args) + ")";
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else
|
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solAssert(false, "Unknown comparison operator.");
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define(_binOp) << expr << "\n";
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}
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else
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{
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string left = expressionAsType(_binOp.leftExpression(), *commonType);
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string right = expressionAsType(_binOp.rightExpression(), *commonType);
|
|
define(_binOp) << binaryOperation(_binOp.getOperator(), *commonType, left, right) << "\n";
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void IRGeneratorForStatements::endVisit(FunctionCall const& _functionCall)
|
|
{
|
|
solUnimplementedAssert(
|
|
_functionCall.annotation().kind == FunctionCallKind::FunctionCall ||
|
|
_functionCall.annotation().kind == FunctionCallKind::TypeConversion,
|
|
"This type of function call is not yet implemented"
|
|
);
|
|
|
|
Type const& funcType = type(_functionCall.expression());
|
|
|
|
if (_functionCall.annotation().kind == FunctionCallKind::TypeConversion)
|
|
{
|
|
solAssert(funcType.category() == Type::Category::TypeType, "Expected category to be TypeType");
|
|
solAssert(_functionCall.arguments().size() == 1, "Expected one argument for type conversion");
|
|
define(_functionCall, *_functionCall.arguments().front());
|
|
return;
|
|
}
|
|
|
|
FunctionTypePointer functionType = dynamic_cast<FunctionType const*>(&funcType);
|
|
|
|
TypePointers parameterTypes = functionType->parameterTypes();
|
|
vector<ASTPointer<Expression const>> const& callArguments = _functionCall.arguments();
|
|
vector<ASTPointer<ASTString>> const& callArgumentNames = _functionCall.names();
|
|
if (!functionType->takesArbitraryParameters())
|
|
solAssert(callArguments.size() == parameterTypes.size(), "");
|
|
|
|
vector<ASTPointer<Expression const>> arguments;
|
|
if (callArgumentNames.empty())
|
|
// normal arguments
|
|
arguments = callArguments;
|
|
else
|
|
// named arguments
|
|
for (auto const& parameterName: functionType->parameterNames())
|
|
{
|
|
auto const it = std::find_if(callArgumentNames.cbegin(), callArgumentNames.cend(), [&](ASTPointer<ASTString> const& _argName) {
|
|
return *_argName == parameterName;
|
|
});
|
|
|
|
solAssert(it != callArgumentNames.cend(), "");
|
|
arguments.push_back(callArguments[std::distance(callArgumentNames.begin(), it)]);
|
|
}
|
|
|
|
solUnimplementedAssert(!functionType->bound(), "");
|
|
switch (functionType->kind())
|
|
{
|
|
case FunctionType::Kind::Internal:
|
|
{
|
|
vector<string> args;
|
|
for (unsigned i = 0; i < arguments.size(); ++i)
|
|
if (functionType->takesArbitraryParameters())
|
|
args.emplace_back(IRVariable(*arguments[i]).commaSeparatedList());
|
|
else
|
|
args.emplace_back(convert(*arguments[i], *parameterTypes[i]).commaSeparatedList());
|
|
|
|
if (auto identifier = dynamic_cast<Identifier const*>(&_functionCall.expression()))
|
|
{
|
|
solAssert(!functionType->bound(), "");
|
|
if (auto functionDef = dynamic_cast<FunctionDefinition const*>(identifier->annotation().referencedDeclaration))
|
|
{
|
|
define(_functionCall) <<
|
|
m_context.virtualFunctionName(*functionDef) <<
|
|
"(" <<
|
|
joinHumanReadable(args) <<
|
|
")\n";
|
|
return;
|
|
}
|
|
}
|
|
|
|
define(_functionCall) <<
|
|
m_context.internalDispatch(
|
|
TupleType(functionType->parameterTypes()).sizeOnStack(),
|
|
TupleType(functionType->returnParameterTypes()).sizeOnStack()
|
|
) <<
|
|
"(" <<
|
|
IRVariable(_functionCall.expression()).part("functionIdentifier").name() <<
|
|
joinHumanReadablePrefixed(args) <<
|
|
")\n";
|
|
break;
|
|
}
|
|
case FunctionType::Kind::External:
|
|
case FunctionType::Kind::DelegateCall:
|
|
case FunctionType::Kind::BareCall:
|
|
case FunctionType::Kind::BareDelegateCall:
|
|
case FunctionType::Kind::BareStaticCall:
|
|
appendExternalFunctionCall(_functionCall, arguments);
|
|
break;
|
|
case FunctionType::Kind::BareCallCode:
|
|
solAssert(false, "Callcode has been removed.");
|
|
case FunctionType::Kind::Event:
|
|
{
|
|
auto const& event = dynamic_cast<EventDefinition const&>(functionType->declaration());
|
|
TypePointers paramTypes = functionType->parameterTypes();
|
|
ABIFunctions abi(m_context.evmVersion(), m_context.revertStrings(), m_context.functionCollector());
|
|
|
|
vector<IRVariable> indexedArgs;
|
|
string nonIndexedArgs;
|
|
TypePointers nonIndexedArgTypes;
|
|
TypePointers nonIndexedParamTypes;
|
|
if (!event.isAnonymous())
|
|
define(indexedArgs.emplace_back(m_context.newYulVariable(), *TypeProvider::uint256())) <<
|
|
formatNumber(u256(h256::Arith(keccak256(functionType->externalSignature())))) << "\n";
|
|
for (size_t i = 0; i < event.parameters().size(); ++i)
|
|
{
|
|
Expression const& arg = *arguments[i];
|
|
if (event.parameters()[i]->isIndexed())
|
|
{
|
|
string value;
|
|
if (auto const& referenceType = dynamic_cast<ReferenceType const*>(paramTypes[i]))
|
|
define(indexedArgs.emplace_back(m_context.newYulVariable(), *TypeProvider::uint256())) <<
|
|
m_utils.packedHashFunction({arg.annotation().type}, {referenceType}) <<
|
|
"(" <<
|
|
IRVariable(arg).commaSeparatedList() <<
|
|
")";
|
|
else
|
|
indexedArgs.emplace_back(convert(arg, *paramTypes[i]));
|
|
}
|
|
else
|
|
{
|
|
string vars = IRVariable(arg).commaSeparatedList();
|
|
if (!vars.empty())
|
|
// In reverse because abi_encode expects it like that.
|
|
nonIndexedArgs = ", " + move(vars) + nonIndexedArgs;
|
|
nonIndexedArgTypes.push_back(arg.annotation().type);
|
|
nonIndexedParamTypes.push_back(paramTypes[i]);
|
|
}
|
|
}
|
|
solAssert(indexedArgs.size() <= 4, "Too many indexed arguments.");
|
|
Whiskers templ(R"({
|
|
let <pos> := <freeMemory>
|
|
let <end> := <encode>(<pos> <nonIndexedArgs>)
|
|
<log>(<pos>, sub(<end>, <pos>) <indexedArgs>)
|
|
})");
|
|
templ("pos", m_context.newYulVariable());
|
|
templ("end", m_context.newYulVariable());
|
|
templ("freeMemory", freeMemory());
|
|
templ("encode", abi.tupleEncoder(nonIndexedArgTypes, nonIndexedParamTypes));
|
|
templ("nonIndexedArgs", nonIndexedArgs);
|
|
templ("log", "log" + to_string(indexedArgs.size()));
|
|
templ("indexedArgs", joinHumanReadablePrefixed(indexedArgs | boost::adaptors::transformed([&](auto const& _arg) {
|
|
return _arg.commaSeparatedList();
|
|
})));
|
|
m_code << templ.render();
|
|
break;
|
|
}
|
|
case FunctionType::Kind::Assert:
|
|
case FunctionType::Kind::Require:
|
|
{
|
|
solAssert(arguments.size() > 0, "Expected at least one parameter for require/assert");
|
|
solAssert(arguments.size() <= 2, "Expected no more than two parameters for require/assert");
|
|
|
|
Type const* messageArgumentType = arguments.size() > 1 ? arguments[1]->annotation().type : nullptr;
|
|
string requireOrAssertFunction = m_utils.requireOrAssertFunction(
|
|
functionType->kind() == FunctionType::Kind::Assert,
|
|
messageArgumentType
|
|
);
|
|
|
|
m_code << move(requireOrAssertFunction) << "(" << IRVariable(*arguments[0]).name();
|
|
if (messageArgumentType && messageArgumentType->sizeOnStack() > 0)
|
|
m_code << ", " << IRVariable(*arguments[1]).commaSeparatedList();
|
|
m_code << ")\n";
|
|
|
|
break;
|
|
}
|
|
// Array creation using new
|
|
case FunctionType::Kind::ObjectCreation:
|
|
{
|
|
ArrayType const& arrayType = dynamic_cast<ArrayType const&>(*_functionCall.annotation().type);
|
|
solAssert(arguments.size() == 1, "");
|
|
|
|
IRVariable value = convert(*arguments[0], *TypeProvider::uint256());
|
|
define(_functionCall) <<
|
|
m_utils.allocateAndInitializeMemoryArrayFunction(arrayType) <<
|
|
"(" <<
|
|
value.commaSeparatedList() <<
|
|
")\n";
|
|
break;
|
|
}
|
|
case FunctionType::Kind::KECCAK256:
|
|
{
|
|
solAssert(arguments.size() == 1, "");
|
|
|
|
ArrayType const* arrayType = TypeProvider::bytesMemory();
|
|
auto array = convert(*arguments[0], *arrayType);
|
|
|
|
define(_functionCall) <<
|
|
"keccak256(" <<
|
|
m_utils.arrayDataAreaFunction(*arrayType) <<
|
|
"(" <<
|
|
array.commaSeparatedList() <<
|
|
"), " <<
|
|
m_utils.arrayLengthFunction(*arrayType) <<
|
|
"(" <<
|
|
array.commaSeparatedList() <<
|
|
"))\n";
|
|
break;
|
|
}
|
|
case FunctionType::Kind::ArrayPop:
|
|
{
|
|
auto const& memberAccessExpression = dynamic_cast<MemberAccess const&>(_functionCall.expression()).expression();
|
|
ArrayType const& arrayType = dynamic_cast<ArrayType const&>(*memberAccessExpression.annotation().type);
|
|
define(_functionCall) <<
|
|
m_utils.storageArrayPopFunction(arrayType) <<
|
|
"(" <<
|
|
IRVariable(_functionCall.expression()).commaSeparatedList() <<
|
|
")\n";
|
|
break;
|
|
}
|
|
case FunctionType::Kind::ArrayPush:
|
|
{
|
|
auto const& memberAccessExpression = dynamic_cast<MemberAccess const&>(_functionCall.expression()).expression();
|
|
ArrayType const& arrayType = dynamic_cast<ArrayType const&>(*memberAccessExpression.annotation().type);
|
|
if (arguments.empty())
|
|
{
|
|
auto slotName = m_context.newYulVariable();
|
|
auto offsetName = m_context.newYulVariable();
|
|
m_code << "let " << slotName << ", " << offsetName << " := " <<
|
|
m_utils.storageArrayPushZeroFunction(arrayType) <<
|
|
"(" << IRVariable(_functionCall.expression()).commaSeparatedList() << ")\n";
|
|
setLValue(_functionCall, IRLValue{
|
|
*arrayType.baseType(),
|
|
IRLValue::Storage{
|
|
slotName,
|
|
offsetName,
|
|
}
|
|
});
|
|
}
|
|
else
|
|
{
|
|
IRVariable argument = convert(*arguments.front(), *arrayType.baseType());
|
|
m_code <<
|
|
m_utils.storageArrayPushFunction(arrayType) <<
|
|
"(" <<
|
|
IRVariable(_functionCall.expression()).commaSeparatedList() <<
|
|
", " <<
|
|
argument.commaSeparatedList() <<
|
|
")\n";
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
solUnimplemented("FunctionKind " + toString(static_cast<int>(functionType->kind())) + " not yet implemented");
|
|
}
|
|
}
|
|
|
|
void IRGeneratorForStatements::endVisit(FunctionCallOptions const& _options)
|
|
{
|
|
FunctionType const& previousType = dynamic_cast<FunctionType const&>(*_options.expression().annotation().type);
|
|
|
|
solUnimplementedAssert(!previousType.bound(), "");
|
|
|
|
// Copy over existing values.
|
|
for (auto const& item: previousType.stackItems())
|
|
define(IRVariable(_options).part(get<0>(item)), IRVariable(_options.expression()).part(get<0>(item)));
|
|
|
|
for (size_t i = 0; i < _options.names().size(); ++i)
|
|
{
|
|
string const& name = *_options.names()[i];
|
|
solAssert(name == "salt" || name == "gas" || name == "value", "");
|
|
|
|
define(IRVariable(_options).part(name), *_options.options()[i]);
|
|
}
|
|
}
|
|
|
|
void IRGeneratorForStatements::endVisit(MemberAccess const& _memberAccess)
|
|
{
|
|
ASTString const& member = _memberAccess.memberName();
|
|
if (auto funType = dynamic_cast<FunctionType const*>(_memberAccess.annotation().type))
|
|
if (funType->bound())
|
|
{
|
|
solUnimplementedAssert(false, "");
|
|
}
|
|
|
|
switch (_memberAccess.expression().annotation().type->category())
|
|
{
|
|
case Type::Category::Contract:
|
|
{
|
|
ContractType const& type = dynamic_cast<ContractType const&>(*_memberAccess.expression().annotation().type);
|
|
if (type.isSuper())
|
|
{
|
|
solUnimplementedAssert(false, "");
|
|
}
|
|
// ordinary contract type
|
|
else if (Declaration const* declaration = _memberAccess.annotation().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.");
|
|
|
|
define(IRVariable(_memberAccess).part("address"), _memberAccess.expression());
|
|
define(IRVariable(_memberAccess).part("functionIdentifier")) << formatNumber(identifier) << "\n";
|
|
}
|
|
else
|
|
solAssert(false, "Invalid member access in contract");
|
|
break;
|
|
}
|
|
case Type::Category::Integer:
|
|
{
|
|
solAssert(false, "Invalid member access to integer");
|
|
break;
|
|
}
|
|
case Type::Category::Address:
|
|
{
|
|
if (member == "balance")
|
|
define(_memberAccess) <<
|
|
"balance(" <<
|
|
expressionAsType(_memberAccess.expression(), *TypeProvider::address()) <<
|
|
")\n";
|
|
else if (set<string>{"send", "transfer"}.count(member))
|
|
{
|
|
solAssert(dynamic_cast<AddressType const&>(*_memberAccess.expression().annotation().type).stateMutability() == StateMutability::Payable, "");
|
|
define(IRVariable{_memberAccess}.part("address"), _memberAccess.expression());
|
|
}
|
|
else if (set<string>{"call", "callcode", "delegatecall", "staticcall"}.count(member))
|
|
define(IRVariable{_memberAccess}.part("address"), _memberAccess.expression());
|
|
else
|
|
solAssert(false, "Invalid member access to address");
|
|
break;
|
|
}
|
|
case Type::Category::Function:
|
|
if (member == "selector")
|
|
{
|
|
solUnimplementedAssert(
|
|
dynamic_cast<FunctionType const&>(*_memberAccess.expression().annotation().type).kind() ==
|
|
FunctionType::Kind::External, ""
|
|
);
|
|
define(IRVariable{_memberAccess}, IRVariable(_memberAccess.expression()).part("functionIdentifier"));
|
|
}
|
|
else if (member == "address")
|
|
{
|
|
solUnimplementedAssert(
|
|
dynamic_cast<FunctionType const&>(*_memberAccess.expression().annotation().type).kind() ==
|
|
FunctionType::Kind::External, ""
|
|
);
|
|
define(IRVariable{_memberAccess}, IRVariable(_memberAccess.expression()).part("address"));
|
|
}
|
|
else
|
|
solAssert(
|
|
!!_memberAccess.expression().annotation().type->memberType(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")
|
|
define(_memberAccess) << "coinbase()\n";
|
|
else if (member == "timestamp")
|
|
define(_memberAccess) << "timestamp()\n";
|
|
else if (member == "difficulty")
|
|
define(_memberAccess) << "difficulty()\n";
|
|
else if (member == "number")
|
|
define(_memberAccess) << "number()\n";
|
|
else if (member == "gaslimit")
|
|
define(_memberAccess) << "gaslimit()\n";
|
|
else if (member == "sender")
|
|
define(_memberAccess) << "caller()\n";
|
|
else if (member == "value")
|
|
define(_memberAccess) << "callvalue()\n";
|
|
else if (member == "origin")
|
|
define(_memberAccess) << "origin()\n";
|
|
else if (member == "gasprice")
|
|
define(_memberAccess) << "gasprice()\n";
|
|
else if (member == "data")
|
|
{
|
|
IRVariable var(_memberAccess);
|
|
declare(var);
|
|
define(var.part("offset")) << "0\n";
|
|
define(var.part("length")) << "calldatasize()\n";
|
|
}
|
|
else if (member == "sig")
|
|
define(_memberAccess) <<
|
|
"and(calldataload(0), " <<
|
|
formatNumber(u256(0xffffffff) << (256 - 32)) <<
|
|
")\n";
|
|
else if (member == "gas")
|
|
solAssert(false, "Gas has been removed.");
|
|
else if (member == "blockhash")
|
|
solAssert(false, "Blockhash has been removed.");
|
|
else if (member == "creationCode" || member == "runtimeCode")
|
|
{
|
|
solUnimplementedAssert(false, "");
|
|
}
|
|
else if (member == "name")
|
|
{
|
|
solUnimplementedAssert(false, "");
|
|
}
|
|
else if (set<string>{"encode", "encodePacked", "encodeWithSelector", "encodeWithSignature", "decode"}.count(member))
|
|
{
|
|
// no-op
|
|
}
|
|
else
|
|
solAssert(false, "Unknown magic member.");
|
|
break;
|
|
case Type::Category::Struct:
|
|
{
|
|
solUnimplementedAssert(false, "");
|
|
}
|
|
case Type::Category::Enum:
|
|
{
|
|
EnumType const& type = dynamic_cast<EnumType const&>(*_memberAccess.expression().annotation().type);
|
|
define(_memberAccess) << to_string(type.memberValue(_memberAccess.memberName())) << "\n";
|
|
break;
|
|
}
|
|
case Type::Category::Array:
|
|
{
|
|
auto const& type = dynamic_cast<ArrayType const&>(*_memberAccess.expression().annotation().type);
|
|
|
|
if (member == "length")
|
|
{
|
|
if (!type.isDynamicallySized())
|
|
define(_memberAccess) << type.length() << "\n";
|
|
else
|
|
switch (type.location())
|
|
{
|
|
case DataLocation::CallData:
|
|
define(_memberAccess, IRVariable(_memberAccess.expression()).part("length"));
|
|
break;
|
|
case DataLocation::Storage:
|
|
{
|
|
define(_memberAccess) <<
|
|
m_utils.arrayLengthFunction(type) <<
|
|
"(" <<
|
|
IRVariable(_memberAccess.expression()).commaSeparatedList() <<
|
|
")\n";
|
|
break;
|
|
}
|
|
case DataLocation::Memory:
|
|
define(_memberAccess) <<
|
|
"mload(" <<
|
|
IRVariable(_memberAccess.expression()).commaSeparatedList() <<
|
|
")\n";
|
|
break;
|
|
}
|
|
}
|
|
else if (member == "pop" || member == "push")
|
|
{
|
|
solAssert(type.location() == DataLocation::Storage, "");
|
|
define(IRVariable{_memberAccess}.part("slot"), IRVariable{_memberAccess.expression()}.part("slot"));
|
|
}
|
|
else
|
|
solAssert(false, "Invalid array member access.");
|
|
|
|
break;
|
|
}
|
|
case Type::Category::FixedBytes:
|
|
{
|
|
auto const& type = dynamic_cast<FixedBytesType const&>(*_memberAccess.expression().annotation().type);
|
|
if (member == "length")
|
|
define(_memberAccess) << to_string(type.numBytes()) << "\n";
|
|
else
|
|
solAssert(false, "Illegal fixed bytes member.");
|
|
break;
|
|
}
|
|
default:
|
|
solAssert(false, "Member access to unknown type.");
|
|
}
|
|
}
|
|
|
|
bool IRGeneratorForStatements::visit(InlineAssembly const& _inlineAsm)
|
|
{
|
|
CopyTranslate bodyCopier{_inlineAsm.dialect(), m_context, _inlineAsm.annotation().externalReferences};
|
|
|
|
yul::Statement modified = bodyCopier(_inlineAsm.operations());
|
|
|
|
solAssert(holds_alternative<yul::Block>(modified), "");
|
|
|
|
// Do not provide dialect so that we get the full type information.
|
|
m_code << yul::AsmPrinter()(std::get<yul::Block>(std::move(modified))) << "\n";
|
|
return false;
|
|
}
|
|
|
|
|
|
void IRGeneratorForStatements::endVisit(IndexAccess const& _indexAccess)
|
|
{
|
|
Type const& baseType = *_indexAccess.baseExpression().annotation().type;
|
|
|
|
if (baseType.category() == Type::Category::Mapping)
|
|
{
|
|
solAssert(_indexAccess.indexExpression(), "Index expression expected.");
|
|
|
|
MappingType const& mappingType = dynamic_cast<MappingType const&>(baseType);
|
|
Type const& keyType = *_indexAccess.indexExpression()->annotation().type;
|
|
solAssert(keyType.sizeOnStack() <= 1, "");
|
|
|
|
string slot = m_context.newYulVariable();
|
|
Whiskers templ("let <slot> := <indexAccess>(<base> <key>)\n");
|
|
templ("slot", slot);
|
|
templ("indexAccess", m_utils.mappingIndexAccessFunction(mappingType, keyType));
|
|
templ("base", IRVariable(_indexAccess.baseExpression()).commaSeparatedList());
|
|
if (keyType.sizeOnStack() == 0)
|
|
templ("key", "");
|
|
else
|
|
templ("key", ", " + IRVariable(*_indexAccess.indexExpression()).commaSeparatedList());
|
|
m_code << templ.render();
|
|
setLValue(_indexAccess, IRLValue{
|
|
*_indexAccess.annotation().type,
|
|
IRLValue::Storage{
|
|
slot,
|
|
0u
|
|
}
|
|
});
|
|
}
|
|
else if (baseType.category() == Type::Category::Array || baseType.category() == Type::Category::ArraySlice)
|
|
{
|
|
ArrayType const& arrayType =
|
|
baseType.category() == Type::Category::Array ?
|
|
dynamic_cast<ArrayType const&>(baseType) :
|
|
dynamic_cast<ArraySliceType const&>(baseType).arrayType();
|
|
|
|
if (baseType.category() == Type::Category::ArraySlice)
|
|
solAssert(arrayType.dataStoredIn(DataLocation::CallData) && arrayType.isDynamicallySized(), "");
|
|
|
|
solAssert(_indexAccess.indexExpression(), "Index expression expected.");
|
|
|
|
switch (arrayType.location())
|
|
{
|
|
case DataLocation::Storage:
|
|
{
|
|
string slot = m_context.newYulVariable();
|
|
string offset = m_context.newYulVariable();
|
|
|
|
m_code << Whiskers(R"(
|
|
let <slot>, <offset> := <indexFunc>(<array>, <index>)
|
|
)")
|
|
("slot", slot)
|
|
("offset", offset)
|
|
("indexFunc", m_utils.storageArrayIndexAccessFunction(arrayType))
|
|
("array", IRVariable(_indexAccess.baseExpression()).part("slot").name())
|
|
("index", IRVariable(*_indexAccess.indexExpression()).name())
|
|
.render();
|
|
|
|
setLValue(_indexAccess, IRLValue{
|
|
*_indexAccess.annotation().type,
|
|
IRLValue::Storage{slot, offset}
|
|
});
|
|
|
|
break;
|
|
}
|
|
case DataLocation::Memory:
|
|
{
|
|
string const memAddress =
|
|
m_utils.memoryArrayIndexAccessFunction(arrayType) +
|
|
"(" +
|
|
IRVariable(_indexAccess.baseExpression()).part("mpos").name() +
|
|
", " +
|
|
expressionAsType(*_indexAccess.indexExpression(), *TypeProvider::uint256()) +
|
|
")";
|
|
|
|
setLValue(_indexAccess, IRLValue{
|
|
*arrayType.baseType(),
|
|
IRLValue::Memory{memAddress}
|
|
});
|
|
break;
|
|
}
|
|
case DataLocation::CallData:
|
|
{
|
|
IRVariable var(m_context.newYulVariable(), *arrayType.baseType());
|
|
define(var) <<
|
|
m_utils.calldataArrayIndexAccessFunction(arrayType) <<
|
|
"(" <<
|
|
IRVariable(_indexAccess.baseExpression()).commaSeparatedList() <<
|
|
", " <<
|
|
expressionAsType(*_indexAccess.indexExpression(), *TypeProvider::uint256()) <<
|
|
")\n";
|
|
if (arrayType.isByteArray())
|
|
define(_indexAccess) <<
|
|
m_utils.cleanupFunction(*arrayType.baseType()) <<
|
|
"(calldataload(" <<
|
|
var.name() <<
|
|
"))\n";
|
|
else if (arrayType.baseType()->isValueType())
|
|
define(_indexAccess) <<
|
|
m_utils.readFromCalldata(*arrayType.baseType()) <<
|
|
"(" <<
|
|
var.commaSeparatedList() <<
|
|
")\n";
|
|
else
|
|
define(_indexAccess, var);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else if (baseType.category() == Type::Category::FixedBytes)
|
|
solUnimplementedAssert(false, "");
|
|
else if (baseType.category() == Type::Category::TypeType)
|
|
{
|
|
solAssert(baseType.sizeOnStack() == 0, "");
|
|
solAssert(_indexAccess.annotation().type->sizeOnStack() == 0, "");
|
|
// no-op - this seems to be a lone array type (`structType[];`)
|
|
}
|
|
else
|
|
solAssert(false, "Index access only allowed for mappings or arrays.");
|
|
}
|
|
|
|
void IRGeneratorForStatements::endVisit(IndexRangeAccess const& _indexRangeAccess)
|
|
{
|
|
Type const& baseType = *_indexRangeAccess.baseExpression().annotation().type;
|
|
solAssert(
|
|
baseType.category() == Type::Category::Array || baseType.category() == Type::Category::ArraySlice,
|
|
"Index range accesses is available only on arrays and array slices."
|
|
);
|
|
|
|
ArrayType const& arrayType =
|
|
baseType.category() == Type::Category::Array ?
|
|
dynamic_cast<ArrayType const &>(baseType) :
|
|
dynamic_cast<ArraySliceType const &>(baseType).arrayType();
|
|
|
|
switch (arrayType.location())
|
|
{
|
|
case DataLocation::CallData:
|
|
{
|
|
solAssert(baseType.isDynamicallySized(), "");
|
|
IRVariable sliceStart{m_context.newYulVariable(), *TypeProvider::uint256()};
|
|
if (_indexRangeAccess.startExpression())
|
|
define(sliceStart, IRVariable{*_indexRangeAccess.startExpression()});
|
|
else
|
|
define(sliceStart) << u256(0) << "\n";
|
|
|
|
IRVariable sliceEnd{
|
|
m_context.newYulVariable(),
|
|
*TypeProvider::uint256()
|
|
};
|
|
if (_indexRangeAccess.endExpression())
|
|
define(sliceEnd, IRVariable{*_indexRangeAccess.endExpression()});
|
|
else
|
|
define(sliceEnd, IRVariable{_indexRangeAccess.baseExpression()}.part("length"));
|
|
|
|
IRVariable range{_indexRangeAccess};
|
|
define(range) <<
|
|
m_utils.calldataArrayIndexRangeAccess(arrayType) << "(" <<
|
|
IRVariable{_indexRangeAccess.baseExpression()}.commaSeparatedList() << ", " <<
|
|
sliceStart.name() << ", " <<
|
|
sliceEnd.name() << ")\n";
|
|
break;
|
|
}
|
|
default:
|
|
solUnimplementedAssert(false, "Index range accesses is implemented only on calldata arrays.");
|
|
}
|
|
}
|
|
|
|
void IRGeneratorForStatements::endVisit(Identifier const& _identifier)
|
|
{
|
|
Declaration const* declaration = _identifier.annotation().referencedDeclaration;
|
|
if (MagicVariableDeclaration const* magicVar = dynamic_cast<MagicVariableDeclaration const*>(declaration))
|
|
{
|
|
switch (magicVar->type()->category())
|
|
{
|
|
case Type::Category::Contract:
|
|
if (dynamic_cast<ContractType const&>(*magicVar->type()).isSuper())
|
|
solAssert(_identifier.name() == "super", "");
|
|
else
|
|
{
|
|
solAssert(_identifier.name() == "this", "");
|
|
define(_identifier) << "address()\n";
|
|
}
|
|
break;
|
|
case Type::Category::Integer:
|
|
solAssert(_identifier.name() == "now", "");
|
|
define(_identifier) << "timestamp()\n";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return;
|
|
}
|
|
else if (FunctionDefinition const* functionDef = dynamic_cast<FunctionDefinition const*>(declaration))
|
|
define(_identifier) << to_string(functionDef->resolveVirtual(m_context.mostDerivedContract()).id()) << "\n";
|
|
else if (VariableDeclaration const* varDecl = dynamic_cast<VariableDeclaration const*>(declaration))
|
|
{
|
|
// TODO for the constant case, we have to be careful:
|
|
// If the value is visited twice, `defineExpression` is called twice on
|
|
// the same expression.
|
|
solUnimplementedAssert(!varDecl->isConstant(), "");
|
|
solUnimplementedAssert(!varDecl->immutable(), "");
|
|
if (m_context.isLocalVariable(*varDecl))
|
|
setLValue(_identifier, IRLValue{
|
|
*varDecl->annotation().type,
|
|
IRLValue::Stack{m_context.localVariable(*varDecl)}
|
|
});
|
|
else if (m_context.isStateVariable(*varDecl))
|
|
setLValue(_identifier, IRLValue{
|
|
*varDecl->annotation().type,
|
|
IRLValue::Storage{
|
|
toCompactHexWithPrefix(m_context.storageLocationOfVariable(*varDecl).first),
|
|
m_context.storageLocationOfVariable(*varDecl).second
|
|
}
|
|
});
|
|
else
|
|
solAssert(false, "Invalid variable kind.");
|
|
}
|
|
else if (auto contract = dynamic_cast<ContractDefinition const*>(declaration))
|
|
{
|
|
solUnimplementedAssert(!contract->isLibrary(), "Libraries not yet supported.");
|
|
}
|
|
else if (dynamic_cast<EventDefinition const*>(declaration))
|
|
{
|
|
// no-op
|
|
}
|
|
else if (dynamic_cast<EnumDefinition const*>(declaration))
|
|
{
|
|
// no-op
|
|
}
|
|
else if (dynamic_cast<StructDefinition const*>(declaration))
|
|
{
|
|
// no-op
|
|
}
|
|
else
|
|
{
|
|
solAssert(false, "Identifier type not expected in expression context.");
|
|
}
|
|
}
|
|
|
|
bool IRGeneratorForStatements::visit(Literal const& _literal)
|
|
{
|
|
Type const& literalType = type(_literal);
|
|
|
|
switch (literalType.category())
|
|
{
|
|
case Type::Category::RationalNumber:
|
|
case Type::Category::Bool:
|
|
case Type::Category::Address:
|
|
define(_literal) << toCompactHexWithPrefix(literalType.literalValue(&_literal)) << "\n";
|
|
break;
|
|
case Type::Category::StringLiteral:
|
|
break; // will be done during conversion
|
|
default:
|
|
solUnimplemented("Only integer, boolean and string literals implemented for now.");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void IRGeneratorForStatements::appendExternalFunctionCall(
|
|
FunctionCall const& _functionCall,
|
|
vector<ASTPointer<Expression const>> const& _arguments
|
|
)
|
|
{
|
|
FunctionType const& funType = dynamic_cast<FunctionType const&>(type(_functionCall.expression()));
|
|
solAssert(
|
|
funType.takesArbitraryParameters() ||
|
|
_arguments.size() == funType.parameterTypes().size(), ""
|
|
);
|
|
solUnimplementedAssert(!funType.bound(), "");
|
|
FunctionType::Kind funKind = funType.kind();
|
|
|
|
solAssert(funKind != FunctionType::Kind::BareStaticCall || m_context.evmVersion().hasStaticCall(), "");
|
|
solAssert(funKind != FunctionType::Kind::BareCallCode, "Callcode has been removed.");
|
|
|
|
bool returnSuccessConditionAndReturndata = funKind == FunctionType::Kind::BareCall || funKind == FunctionType::Kind::BareDelegateCall || funKind == FunctionType::Kind::BareStaticCall;
|
|
bool isDelegateCall = funKind == FunctionType::Kind::BareDelegateCall || funKind == FunctionType::Kind::DelegateCall;
|
|
bool useStaticCall = funKind == FunctionType::Kind::BareStaticCall || (funType.stateMutability() <= StateMutability::View && m_context.evmVersion().hasStaticCall());
|
|
|
|
bool haveReturndatacopy = m_context.evmVersion().supportsReturndata();
|
|
unsigned estimatedReturnSize = 0;
|
|
bool dynamicReturnSize = false;
|
|
TypePointers returnTypes;
|
|
if (!returnSuccessConditionAndReturndata)
|
|
{
|
|
if (haveReturndatacopy)
|
|
returnTypes = funType.returnParameterTypes();
|
|
else
|
|
returnTypes = funType.returnParameterTypesWithoutDynamicTypes();
|
|
|
|
for (auto const& retType: returnTypes)
|
|
if (retType->isDynamicallyEncoded())
|
|
{
|
|
solAssert(haveReturndatacopy, "");
|
|
dynamicReturnSize = true;
|
|
estimatedReturnSize = 0;
|
|
break;
|
|
}
|
|
else if (retType->decodingType())
|
|
estimatedReturnSize += retType->decodingType()->calldataEncodedSize();
|
|
else
|
|
estimatedReturnSize += retType->calldataEncodedSize();
|
|
}
|
|
|
|
TypePointers argumentTypes;
|
|
vector<string> argumentStrings;
|
|
for (auto const& arg: _arguments)
|
|
{
|
|
argumentTypes.emplace_back(&type(*arg));
|
|
argumentStrings.emplace_back(IRVariable(*arg).commaSeparatedList());
|
|
}
|
|
string argumentString = argumentStrings.empty() ? ""s : (", " + joinHumanReadable(argumentStrings));
|
|
|
|
solUnimplementedAssert(funKind != FunctionType::Kind::ECRecover, "");
|
|
|
|
if (!m_context.evmVersion().canOverchargeGasForCall())
|
|
{
|
|
// Touch the end of the output area so that we do not pay for memory resize during the call
|
|
// (which we would have to subtract from the gas left)
|
|
// We could also just use MLOAD; POP right before the gas calculation, but the optimizer
|
|
// would remove that, so we use MSTORE here.
|
|
if (!funType.gasSet() && estimatedReturnSize > 0)
|
|
m_code << "mstore(add(" << freeMemory() << ", " << to_string(estimatedReturnSize) << "), 0)\n";
|
|
}
|
|
|
|
ABIFunctions abi(m_context.evmVersion(), m_context.revertStrings(), m_context.functionCollector());
|
|
|
|
solUnimplementedAssert(!funType.isBareCall(), "");
|
|
Whiskers templ(R"(
|
|
<?checkExistence>
|
|
if iszero(extcodesize(<address>)) { revert(0, 0) }
|
|
</checkExistence>
|
|
|
|
let <pos> := <freeMemory>
|
|
|
|
mstore(<pos>, <shl28>(<funId>))
|
|
let <end> := <encodeArgs>(add(<pos>, 4) <argumentString>)
|
|
|
|
let <result> := <call>(<gas>, <address>, <?hasValue> <value>, </hasValue> <pos>, sub(<end>, <pos>), <pos>, <reservedReturnSize>)
|
|
if iszero(<result>) { <forwardingRevert>() }
|
|
|
|
<?dynamicReturnSize>
|
|
returndatacopy(<pos>, 0, returndatasize())
|
|
</dynamicReturnSize>
|
|
|
|
mstore(<freeMemoryPointer>, add(<pos>, and(add(<returnSize>, 0x1f), not(0x1f))))
|
|
<?returns> let <retVars> := </returns> <abiDecode>(<pos>, add(<pos>, <returnSize>))
|
|
)");
|
|
templ("pos", m_context.newYulVariable());
|
|
templ("end", m_context.newYulVariable());
|
|
templ("result", m_context.newYulVariable());
|
|
templ("freeMemory", freeMemory());
|
|
templ("freeMemoryPointer", to_string(CompilerUtils::freeMemoryPointer));
|
|
templ("shl28", m_utils.shiftLeftFunction(8 * (32 - 4)));
|
|
templ("funId", IRVariable(_functionCall.expression()).part("functionIdentifier").name());
|
|
templ("address", IRVariable(_functionCall.expression()).part("address").name());
|
|
|
|
// If the function takes arbitrary parameters or is a bare call, copy dynamic length data in place.
|
|
// Move arguments to memory, will not update the free memory pointer (but will update the memory
|
|
// pointer on the stack).
|
|
bool encodeInPlace = funType.takesArbitraryParameters() || funType.isBareCall();
|
|
if (funType.kind() == FunctionType::Kind::ECRecover)
|
|
// This would be the only combination of padding and in-place encoding,
|
|
// but all parameters of ecrecover are value types anyway.
|
|
encodeInPlace = false;
|
|
bool encodeForLibraryCall = funKind == FunctionType::Kind::DelegateCall;
|
|
solUnimplementedAssert(!encodeInPlace, "");
|
|
solUnimplementedAssert(funType.padArguments(), "");
|
|
templ("encodeArgs", abi.tupleEncoder(argumentTypes, funType.parameterTypes(), encodeForLibraryCall));
|
|
templ("argumentString", argumentString);
|
|
|
|
// Output data will replace input data, unless we have ECRecover (then, output
|
|
// area will be 32 bytes just before input area).
|
|
solUnimplementedAssert(funKind != FunctionType::Kind::ECRecover, "");
|
|
|
|
solAssert(!isDelegateCall || !funType.valueSet(), "Value set for delegatecall");
|
|
solAssert(!useStaticCall || !funType.valueSet(), "Value set for staticcall");
|
|
|
|
templ("hasValue", !isDelegateCall && !useStaticCall);
|
|
templ("value", funType.valueSet() ? IRVariable(_functionCall.expression()).part("value").name() : "0");
|
|
|
|
// Check that the target contract exists (has code) for non-low-level calls.
|
|
bool checkExistence = (funKind == FunctionType::Kind::External || funKind == FunctionType::Kind::DelegateCall);
|
|
templ("checkExistence", checkExistence);
|
|
|
|
if (funType.gasSet())
|
|
templ("gas", IRVariable(_functionCall.expression()).part("gas").name());
|
|
else if (m_context.evmVersion().canOverchargeGasForCall())
|
|
// Send all gas (requires tangerine whistle EVM)
|
|
templ("gas", "gas()");
|
|
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.
|
|
u256 gasNeededByCaller = evmasm::GasCosts::callGas(m_context.evmVersion()) + 10;
|
|
if (funType.valueSet())
|
|
gasNeededByCaller += evmasm::GasCosts::callValueTransferGas;
|
|
if (!checkExistence)
|
|
gasNeededByCaller += evmasm::GasCosts::callNewAccountGas; // we never know
|
|
templ("gas", "sub(gas(), " + formatNumber(gasNeededByCaller) + ")");
|
|
}
|
|
// Order is important here, STATICCALL might overlap with DELEGATECALL.
|
|
if (isDelegateCall)
|
|
templ("call", "delegatecall");
|
|
else if (useStaticCall)
|
|
templ("call", "staticcall");
|
|
else
|
|
templ("call", "call");
|
|
|
|
templ("forwardingRevert", m_utils.forwardingRevertFunction());
|
|
|
|
solUnimplementedAssert(!returnSuccessConditionAndReturndata, "");
|
|
solUnimplementedAssert(funKind != FunctionType::Kind::RIPEMD160, "");
|
|
solUnimplementedAssert(funKind != FunctionType::Kind::ECRecover, "");
|
|
|
|
templ("dynamicReturnSize", dynamicReturnSize);
|
|
// Always use the actual return length, and not our calculated expected length, if returndatacopy is supported.
|
|
// This ensures it can catch badly formatted input from external calls.
|
|
if (haveReturndatacopy)
|
|
templ("returnSize", "returndatasize()");
|
|
else
|
|
templ("returnSize", to_string(estimatedReturnSize));
|
|
|
|
templ("reservedReturnSize", dynamicReturnSize ? "0" : to_string(estimatedReturnSize));
|
|
|
|
templ("abiDecode", abi.tupleDecoder(returnTypes, true));
|
|
templ("returns", !returnTypes.empty());
|
|
templ("retVars", IRVariable(_functionCall).commaSeparatedList());
|
|
|
|
m_code << templ.render();
|
|
}
|
|
|
|
string IRGeneratorForStatements::freeMemory()
|
|
{
|
|
return "mload(" + to_string(CompilerUtils::freeMemoryPointer) + ")";
|
|
}
|
|
|
|
IRVariable IRGeneratorForStatements::convert(IRVariable const& _from, Type const& _to)
|
|
{
|
|
if (_from.type() == _to)
|
|
return _from;
|
|
else
|
|
{
|
|
IRVariable converted(m_context.newYulVariable(), _to);
|
|
define(converted, _from);
|
|
return converted;
|
|
}
|
|
}
|
|
|
|
std::string IRGeneratorForStatements::expressionAsType(Expression const& _expression, Type const& _to)
|
|
{
|
|
IRVariable from(_expression);
|
|
if (from.type() == _to)
|
|
return from.commaSeparatedList();
|
|
else
|
|
return m_utils.conversionFunction(from.type(), _to) + "(" + from.commaSeparatedList() + ")";
|
|
}
|
|
|
|
std::ostream& IRGeneratorForStatements::define(IRVariable const& _var)
|
|
{
|
|
if (_var.type().sizeOnStack() > 0)
|
|
m_code << "let " << _var.commaSeparatedList() << " := ";
|
|
return m_code;
|
|
}
|
|
|
|
void IRGeneratorForStatements::declare(IRVariable const& _var)
|
|
{
|
|
if (_var.type().sizeOnStack() > 0)
|
|
m_code << "let " << _var.commaSeparatedList() << "\n";
|
|
}
|
|
|
|
void IRGeneratorForStatements::declareAssign(IRVariable const& _lhs, IRVariable const& _rhs, bool _declare)
|
|
{
|
|
string output;
|
|
if (_lhs.type() == _rhs.type())
|
|
for (auto const& [stackItemName, stackItemType]: _lhs.type().stackItems())
|
|
if (stackItemType)
|
|
declareAssign(_lhs.part(stackItemName), _rhs.part(stackItemName), _declare);
|
|
else
|
|
m_code << (_declare ? "let ": "") << _lhs.part(stackItemName).name() << " := " << _rhs.part(stackItemName).name() << "\n";
|
|
else
|
|
m_code <<
|
|
(_declare ? "let ": "") <<
|
|
_lhs.commaSeparatedList() <<
|
|
" := " <<
|
|
m_context.utils().conversionFunction(_rhs.type(), _lhs.type()) <<
|
|
"(" <<
|
|
_rhs.commaSeparatedList() <<
|
|
")\n";
|
|
}
|
|
|
|
IRVariable IRGeneratorForStatements::zeroValue(Type const& _type, bool _splitFunctionTypes)
|
|
{
|
|
IRVariable irVar{
|
|
"zero_value_for_type_" + _type.identifier() + m_context.newYulVariable(),
|
|
_type
|
|
};
|
|
define(irVar) << m_utils.zeroValueFunction(_type, _splitFunctionTypes) << "()\n";
|
|
return irVar;
|
|
}
|
|
|
|
void IRGeneratorForStatements::appendSimpleUnaryOperation(UnaryOperation const& _operation, Expression const& _expr)
|
|
{
|
|
string func;
|
|
|
|
if (_operation.getOperator() == Token::Not)
|
|
func = "iszero";
|
|
else if (_operation.getOperator() == Token::BitNot)
|
|
func = "not";
|
|
else
|
|
solAssert(false, "Invalid Token!");
|
|
|
|
define(_operation) <<
|
|
m_utils.cleanupFunction(type(_expr)) <<
|
|
"(" <<
|
|
func <<
|
|
"(" <<
|
|
IRVariable(_expr).commaSeparatedList() <<
|
|
")" <<
|
|
")\n";
|
|
}
|
|
|
|
string IRGeneratorForStatements::binaryOperation(
|
|
langutil::Token _operator,
|
|
Type const& _type,
|
|
string const& _left,
|
|
string const& _right
|
|
)
|
|
{
|
|
if (IntegerType const* type = dynamic_cast<IntegerType const*>(&_type))
|
|
{
|
|
string fun;
|
|
// TODO: Implement all operations for signed and unsigned types.
|
|
switch (_operator)
|
|
{
|
|
case Token::Add:
|
|
fun = m_utils.overflowCheckedIntAddFunction(*type);
|
|
break;
|
|
case Token::Sub:
|
|
fun = m_utils.overflowCheckedIntSubFunction(*type);
|
|
break;
|
|
case Token::Mul:
|
|
fun = m_utils.overflowCheckedIntMulFunction(*type);
|
|
break;
|
|
case Token::Div:
|
|
fun = m_utils.overflowCheckedIntDivFunction(*type);
|
|
break;
|
|
case Token::Mod:
|
|
fun = m_utils.checkedIntModFunction(*type);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
solUnimplementedAssert(!fun.empty(), "");
|
|
return fun + "(" + _left + ", " + _right + ")\n";
|
|
}
|
|
else
|
|
solUnimplementedAssert(false, "");
|
|
|
|
return {};
|
|
}
|
|
|
|
void IRGeneratorForStatements::appendAndOrOperatorCode(BinaryOperation const& _binOp)
|
|
{
|
|
langutil::Token const op = _binOp.getOperator();
|
|
solAssert(op == Token::Or || op == Token::And, "");
|
|
|
|
_binOp.leftExpression().accept(*this);
|
|
|
|
IRVariable value(_binOp);
|
|
define(value, _binOp.leftExpression());
|
|
if (op == Token::Or)
|
|
m_code << "if iszero(" << value.name() << ") {\n";
|
|
else
|
|
m_code << "if " << value.name() << " {\n";
|
|
_binOp.rightExpression().accept(*this);
|
|
assign(value, _binOp.rightExpression());
|
|
m_code << "}\n";
|
|
}
|
|
|
|
void IRGeneratorForStatements::writeToLValue(IRLValue const& _lvalue, IRVariable const& _value)
|
|
{
|
|
std::visit(
|
|
util::GenericVisitor{
|
|
[&](IRLValue::Storage const& _storage) {
|
|
std::optional<unsigned> offset;
|
|
|
|
if (std::holds_alternative<unsigned>(_storage.offset))
|
|
offset = std::get<unsigned>(_storage.offset);
|
|
|
|
m_code <<
|
|
m_utils.updateStorageValueFunction(_lvalue.type, offset) <<
|
|
"(" <<
|
|
_storage.slot <<
|
|
(
|
|
std::holds_alternative<string>(_storage.offset) ?
|
|
(", " + std::get<string>(_storage.offset)) :
|
|
""
|
|
) <<
|
|
_value.commaSeparatedListPrefixed() <<
|
|
")\n";
|
|
},
|
|
[&](IRLValue::Memory const& _memory) {
|
|
if (_lvalue.type.isValueType())
|
|
{
|
|
IRVariable prepared(m_context.newYulVariable(), _lvalue.type);
|
|
define(prepared, _value);
|
|
|
|
if (_memory.byteArrayElement)
|
|
{
|
|
solAssert(_lvalue.type == *TypeProvider::byte(), "");
|
|
m_code << "mstore8(" + _memory.address + ", byte(0, " + prepared.commaSeparatedList() + "))\n";
|
|
}
|
|
else
|
|
m_code << m_utils.writeToMemoryFunction(_lvalue.type) <<
|
|
"(" <<
|
|
_memory.address <<
|
|
", " <<
|
|
prepared.commaSeparatedList() <<
|
|
")\n";
|
|
}
|
|
else
|
|
{
|
|
solAssert(_lvalue.type.sizeOnStack() == 1, "");
|
|
solAssert(dynamic_cast<ReferenceType const*>(&_lvalue.type), "");
|
|
auto const* valueReferenceType = dynamic_cast<ReferenceType const*>(&_value.type());
|
|
solAssert(valueReferenceType && valueReferenceType->dataStoredIn(DataLocation::Memory), "");
|
|
m_code << "mstore(" + _memory.address + ", " + _value.part("mpos").name() + ")\n";
|
|
}
|
|
},
|
|
[&](IRLValue::Stack const& _stack) { assign(_stack.variable, _value); },
|
|
[&](IRLValue::Tuple const& _tuple) {
|
|
auto components = std::move(_tuple.components);
|
|
for (size_t i = 0; i < components.size(); i++)
|
|
{
|
|
size_t idx = components.size() - i - 1;
|
|
if (components[idx])
|
|
writeToLValue(*components[idx], _value.tupleComponent(idx));
|
|
}
|
|
}
|
|
},
|
|
_lvalue.kind
|
|
);
|
|
}
|
|
|
|
IRVariable IRGeneratorForStatements::readFromLValue(IRLValue const& _lvalue)
|
|
{
|
|
IRVariable result{m_context.newYulVariable(), _lvalue.type};
|
|
std::visit(GenericVisitor{
|
|
[&](IRLValue::Storage const& _storage) {
|
|
if (!_lvalue.type.isValueType())
|
|
define(result) << _storage.slot << "\n";
|
|
else if (std::holds_alternative<string>(_storage.offset))
|
|
define(result) <<
|
|
m_utils.readFromStorageDynamic(_lvalue.type, false) <<
|
|
"(" <<
|
|
_storage.slot <<
|
|
", " <<
|
|
std::get<string>(_storage.offset) <<
|
|
")\n";
|
|
else
|
|
define(result) <<
|
|
m_utils.readFromStorage(_lvalue.type, std::get<unsigned>(_storage.offset), false) <<
|
|
"(" <<
|
|
_storage.slot <<
|
|
")\n";
|
|
},
|
|
[&](IRLValue::Memory const& _memory) {
|
|
if (_memory.byteArrayElement)
|
|
define(result) <<
|
|
m_utils.cleanupFunction(_lvalue.type) <<
|
|
"(mload(" <<
|
|
_memory.address <<
|
|
"))\n";
|
|
else if (_lvalue.type.isValueType())
|
|
define(result) <<
|
|
m_utils.readFromMemory(_lvalue.type) <<
|
|
"(" <<
|
|
_memory.address <<
|
|
")\n";
|
|
else
|
|
define(result) << "mload(" << _memory.address << ")\n";
|
|
},
|
|
[&](IRLValue::Stack const& _stack) {
|
|
define(result, _stack.variable);
|
|
},
|
|
[&](IRLValue::Tuple const&) {
|
|
solAssert(false, "Attempted to read from tuple lvalue.");
|
|
}
|
|
}, _lvalue.kind);
|
|
return result;
|
|
}
|
|
|
|
void IRGeneratorForStatements::setLValue(Expression const& _expression, IRLValue _lvalue)
|
|
{
|
|
solAssert(!m_currentLValue, "");
|
|
|
|
if (_expression.annotation().lValueRequested)
|
|
{
|
|
m_currentLValue.emplace(std::move(_lvalue));
|
|
solAssert(!_lvalue.type.dataStoredIn(DataLocation::CallData), "");
|
|
}
|
|
else
|
|
// Only define the expression, if it will not be written to.
|
|
define(_expression, readFromLValue(_lvalue));
|
|
}
|
|
|
|
void IRGeneratorForStatements::generateLoop(
|
|
Statement const& _body,
|
|
Expression const* _conditionExpression,
|
|
Statement const* _initExpression,
|
|
ExpressionStatement const* _loopExpression,
|
|
bool _isDoWhile
|
|
)
|
|
{
|
|
string firstRun;
|
|
|
|
if (_isDoWhile)
|
|
{
|
|
solAssert(_conditionExpression, "Expected condition for doWhile");
|
|
firstRun = m_context.newYulVariable();
|
|
m_code << "let " << firstRun << " := 1\n";
|
|
}
|
|
|
|
m_code << "for {\n";
|
|
if (_initExpression)
|
|
_initExpression->accept(*this);
|
|
m_code << "} 1 {\n";
|
|
if (_loopExpression)
|
|
_loopExpression->accept(*this);
|
|
m_code << "}\n";
|
|
m_code << "{\n";
|
|
|
|
if (_conditionExpression)
|
|
{
|
|
if (_isDoWhile)
|
|
m_code << "if iszero(" << firstRun << ") {\n";
|
|
|
|
_conditionExpression->accept(*this);
|
|
m_code <<
|
|
"if iszero(" <<
|
|
expressionAsType(*_conditionExpression, *TypeProvider::boolean()) <<
|
|
") { break }\n";
|
|
|
|
if (_isDoWhile)
|
|
m_code << "}\n" << firstRun << " := 0\n";
|
|
}
|
|
|
|
_body.accept(*this);
|
|
|
|
m_code << "}\n";
|
|
}
|
|
|
|
Type const& IRGeneratorForStatements::type(Expression const& _expression)
|
|
{
|
|
solAssert(_expression.annotation().type, "Type of expression not set.");
|
|
return *_expression.annotation().type;
|
|
}
|