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IRGeneratorForStatements.cpp
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IRGeneratorForStatements.cpp
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/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
// SPDX-License-Identifier: GPL-3.0
/**
* Component that translates Solidity code into Yul at statement level and below.
*/
#include <libsolidity/codegen/ir/IRGeneratorForStatements.h>
#include <libsolidity/codegen/ABIFunctions.h>
#include <libsolidity/codegen/ir/IRGenerationContext.h>
#include <libsolidity/codegen/ir/IRLValue.h>
#include <libsolidity/codegen/ir/IRVariable.h>
#include <libsolidity/codegen/YulUtilFunctions.h>
#include <libsolidity/codegen/ABIFunctions.h>
#include <libsolidity/codegen/CompilerUtils.h>
#include <libsolidity/codegen/ReturnInfo.h>
#include <libsolidity/ast/TypeProvider.h>
#include <libsolidity/ast/ASTUtils.h>
#include <libevmasm/GasMeter.h>
#include <libyul/AsmPrinter.h>
#include <libyul/AST.h>
#include <libyul/Dialect.h>
#include <libyul/Utilities.h>
#include <libyul/optimiser/ASTCopier.h>
#include <liblangutil/Exceptions.h>
#include <libsolutil/Whiskers.h>
#include <libsolutil/StringUtils.h>
#include <libsolutil/Keccak256.h>
#include <libsolutil/FunctionSelector.h>
#include <libsolutil/Visitor.h>
#include <range/v3/algorithm/all_of.hpp>
#include <range/v3/view/transform.hpp>
using namespace solidity;
using namespace solidity::util;
using namespace solidity::frontend;
using namespace std::string_literals;
namespace
{
struct CopyTranslate: public yul::ASTCopier
{
using ExternalRefsMap = std::map<yul::Identifier const*, InlineAssemblyAnnotation::ExternalIdentifierInfo>;
CopyTranslate(yul::Dialect const& _dialect, IRGenerationContext& _context, ExternalRefsMap const& _references):
m_dialect(_dialect), m_context(_context), m_references(_references) {}
using ASTCopier::operator();
yul::Expression operator()(yul::Identifier const& _identifier) override
{
// The operator() function is only called in lvalue context. In rvalue context,
// only translate(yul::Identifier) is called.
if (m_references.count(&_identifier))
return translateReference(_identifier);
else
return ASTCopier::operator()(_identifier);
}
yul::YulString translateIdentifier(yul::YulString _name) override
{
// Strictly, the dialect used by inline assembly (m_dialect) could be different
// from the Yul dialect we are compiling to. So we are assuming here that the builtin
// functions are identical. This should not be a problem for now since everything
// is EVM anyway.
if (m_dialect.builtin(_name))
return _name;
else
return yul::YulString{"usr$" + _name.str()};
}
yul::Identifier translate(yul::Identifier const& _identifier) override
{
if (!m_references.count(&_identifier))
return ASTCopier::translate(_identifier);
yul::Expression translated = translateReference(_identifier);
solAssert(std::holds_alternative<yul::Identifier>(translated));
return std::get<yul::Identifier>(std::move(translated));
}
private:
/// Translates a reference to a local variable, potentially including
/// a suffix. Might return a literal, which causes this to be invalid in
/// lvalue-context.
yul::Expression translateReference(yul::Identifier const& _identifier)
{
auto const& reference = m_references.at(&_identifier);
auto const varDecl = dynamic_cast<VariableDeclaration const*>(reference.declaration);
solUnimplementedAssert(varDecl);
std::string const& suffix = reference.suffix;
std::string value;
if (suffix.empty() && varDecl->isLocalVariable())
{
auto const& var = m_context.localVariable(*varDecl);
solAssert(var.type().sizeOnStack() == 1);
value = var.commaSeparatedList();
}
else if (varDecl->isConstant())
{
VariableDeclaration const* variable = rootConstVariableDeclaration(*varDecl);
solAssert(variable);
if (variable->value()->annotation().type->category() == Type::Category::RationalNumber)
{
u256 intValue = dynamic_cast<RationalNumberType const&>(*variable->value()->annotation().type).literalValue(nullptr);
if (auto const* bytesType = dynamic_cast<FixedBytesType const*>(variable->type()))
intValue <<= 256 - 8 * bytesType->numBytes();
else
solAssert(variable->type()->category() == Type::Category::Integer);
value = intValue.str();
}
else if (auto const* literal = dynamic_cast<Literal const*>(variable->value().get()))
{
Type const* type = literal->annotation().type;
switch (type->category())
{
case Type::Category::Bool:
case Type::Category::Address:
solAssert(type->category() == variable->annotation().type->category());
value = toCompactHexWithPrefix(type->literalValue(literal));
break;
case Type::Category::StringLiteral:
{
auto const& stringLiteral = dynamic_cast<StringLiteralType const&>(*type);
solAssert(variable->type()->category() == Type::Category::FixedBytes);
unsigned const numBytes = dynamic_cast<FixedBytesType const&>(*variable->type()).numBytes();
solAssert(stringLiteral.value().size() <= numBytes);
value = formatNumber(u256(h256(stringLiteral.value(), h256::AlignLeft)));
break;
}
default:
solAssert(false);
}
}
else
solAssert(false, "Invalid constant in inline assembly.");
}
else if (varDecl->isStateVariable())
{
if (suffix == "slot")
value = m_context.storageLocationOfStateVariable(*varDecl).first.str();
else if (suffix == "offset")
value = std::to_string(m_context.storageLocationOfStateVariable(*varDecl).second);
else
solAssert(false);
}
else if (varDecl->type()->dataStoredIn(DataLocation::Storage))
{
solAssert(suffix == "slot" || suffix == "offset");
solAssert(varDecl->isLocalVariable());
solAssert(!varDecl->type()->isValueType());
if (suffix == "slot")
value = IRVariable{*varDecl}.part("slot").name();
else
{
solAssert(!IRVariable{*varDecl}.hasPart("offset"));
value = "0"s;
}
}
else if (varDecl->type()->dataStoredIn(DataLocation::CallData))
{
solAssert(suffix == "offset" || suffix == "length");
value = IRVariable{*varDecl}.part(suffix).name();
}
else if (
auto const* functionType = dynamic_cast<FunctionType const*>(varDecl->type());
functionType && functionType->kind() == FunctionType::Kind::External
)
{
solAssert(suffix == "selector" || suffix == "address");
solAssert(varDecl->type()->sizeOnStack() == 2);
if (suffix == "selector")
value = IRVariable{*varDecl}.part("functionSelector").name();
else
value = IRVariable{*varDecl}.part("address").name();
}
else
solAssert(false);
if (isDigit(value.front()))
return yul::Literal{_identifier.debugData, yul::LiteralKind::Number, yul::valueOfNumberLiteral(value), {}};
else
return yul::Identifier{_identifier.debugData, yul::YulString{value}};
}
yul::Dialect const& m_dialect;
IRGenerationContext& m_context;
ExternalRefsMap const& m_references;
};
}
std::string IRGeneratorForStatementsBase::code() const
{
return m_code.str();
}
std::ostringstream& IRGeneratorForStatementsBase::appendCode(bool _addLocationComment)
{
if (
_addLocationComment &&
m_currentLocation.isValid() &&
m_lastLocation != m_currentLocation
)
m_code << dispenseLocationComment(m_currentLocation, m_context) << "\n";
m_lastLocation = m_currentLocation;
return m_code;
}
void IRGeneratorForStatementsBase::setLocation(ASTNode const& _node)
{
m_currentLocation = _node.location();
}
std::string IRGeneratorForStatements::code() const
{
solAssert(!m_currentLValue, "LValue not reset!");
return IRGeneratorForStatementsBase::code();
}
void IRGeneratorForStatements::generate(Block const& _block)
{
try
{
_block.accept(*this);
}
catch (langutil::UnimplementedFeatureError const& _error)
{
if (!boost::get_error_info<langutil::errinfo_sourceLocation>(_error))
_error << langutil::errinfo_sourceLocation(m_currentLocation);
BOOST_THROW_EXCEPTION(_error);
}
}
void IRGeneratorForStatements::initializeStateVar(VariableDeclaration const& _varDecl)
{
try
{
setLocation(_varDecl);
solAssert(_varDecl.immutable() || m_context.isStateVariable(_varDecl), "Must be immutable or a state variable.");
solAssert(!_varDecl.isConstant());
if (!_varDecl.value())
return;
_varDecl.value()->accept(*this);
writeToLValue(
_varDecl.immutable() ?
IRLValue{*_varDecl.annotation().type, IRLValue::Immutable{&_varDecl}} :
IRLValue{*_varDecl.annotation().type, IRLValue::Storage{
toCompactHexWithPrefix(m_context.storageLocationOfStateVariable(_varDecl).first),
m_context.storageLocationOfStateVariable(_varDecl).second
}},
*_varDecl.value()
);
}
catch (langutil::UnimplementedFeatureError const& _error)
{
if (!boost::get_error_info<langutil::errinfo_sourceLocation>(_error))
_error << langutil::errinfo_sourceLocation(m_currentLocation);
BOOST_THROW_EXCEPTION(_error);
}
}
void IRGeneratorForStatements::initializeLocalVar(VariableDeclaration const& _varDecl)
{
try
{
setLocation(_varDecl);
solAssert(m_context.isLocalVariable(_varDecl), "Must be a local variable.");
auto const* type = _varDecl.type();
if (dynamic_cast<MappingType const*>(type))
return;
else if (auto const* refType = dynamic_cast<ReferenceType const*>(type))
if (refType->dataStoredIn(DataLocation::Storage) && refType->isPointer())
return;
IRVariable zero = zeroValue(*type);
assign(m_context.localVariable(_varDecl), zero);
}
catch (langutil::UnimplementedFeatureError const& _error)
{
if (!boost::get_error_info<langutil::errinfo_sourceLocation>(_error))
_error << langutil::errinfo_sourceLocation(m_currentLocation);
BOOST_THROW_EXCEPTION(_error);
}
}
IRVariable IRGeneratorForStatements::evaluateExpression(Expression const& _expression, Type const& _targetType)
{
try
{
setLocation(_expression);
_expression.accept(*this);
setLocation(_expression);
IRVariable variable{m_context.newYulVariable(), _targetType};
define(variable, _expression);
return variable;
}
catch (langutil::UnimplementedFeatureError const& _error)
{
if (!boost::get_error_info<langutil::errinfo_sourceLocation>(_error))
_error << langutil::errinfo_sourceLocation(m_currentLocation);
BOOST_THROW_EXCEPTION(_error);
}
}
std::string IRGeneratorForStatements::constantValueFunction(VariableDeclaration const& _constant)
{
try
{
std::string functionName = IRNames::constantValueFunction(_constant);
return m_context.functionCollector().createFunction(functionName, [&] {
Whiskers templ(R"(
<sourceLocationComment>
function <functionName>() -> <ret> {
<code>
<ret> := <value>
}
)");
templ("sourceLocationComment", dispenseLocationComment(_constant, m_context));
templ("functionName", functionName);
IRGeneratorForStatements generator(m_context, m_utils, m_optimiserSettings);
solAssert(_constant.value());
Type const& constantType = *_constant.type();
templ("value", generator.evaluateExpression(*_constant.value(), constantType).commaSeparatedList());
templ("code", generator.code());
templ("ret", IRVariable("ret", constantType).commaSeparatedList());
return templ.render();
});
}
catch (langutil::UnimplementedFeatureError const& _error)
{
if (!boost::get_error_info<langutil::errinfo_sourceLocation>(_error))
_error << langutil::errinfo_sourceLocation(m_currentLocation);
BOOST_THROW_EXCEPTION(_error);
}
}
void IRGeneratorForStatements::endVisit(VariableDeclarationStatement const& _varDeclStatement)
{
setLocation(_varDeclStatement);
auto static notTransient = [](std::shared_ptr<VariableDeclaration> const& _varDeclaration) {
return (_varDeclaration ? _varDeclaration->referenceLocation() != VariableDeclaration::Location::Transient : true);
};
solUnimplementedAssert(
ranges::all_of(_varDeclStatement.declarations(), notTransient),
"Transient storage variables are not supported."
);
if (Expression const* expression = _varDeclStatement.initialValue())
{
if (_varDeclStatement.declarations().size() > 1)
{
auto const* tupleType = dynamic_cast<TupleType const*>(expression->annotation().type);
solAssert(tupleType, "Expected expression of tuple type.");
solAssert(_varDeclStatement.declarations().size() == tupleType->components().size(), "Invalid number of tuple components.");
for (size_t i = 0; i < _varDeclStatement.declarations().size(); ++i)
if (auto const& decl = _varDeclStatement.declarations()[i])
{
solAssert(tupleType->components()[i]);
define(m_context.addLocalVariable(*decl), IRVariable(*expression).tupleComponent(i));
}
}
else
{
VariableDeclaration const& varDecl = *_varDeclStatement.declarations().front();
define(m_context.addLocalVariable(varDecl), *expression);
}
}
else
for (auto const& decl: _varDeclStatement.declarations())
if (decl)
{
declare(m_context.addLocalVariable(*decl));
initializeLocalVar(*decl);
}
}
bool IRGeneratorForStatements::visit(Conditional const& _conditional)
{
_conditional.condition().accept(*this);
setLocation(_conditional);
std::string condition = expressionAsType(_conditional.condition(), *TypeProvider::boolean());
declare(_conditional);
appendCode() << "switch " << condition << "\n" "case 0 {\n";
_conditional.falseExpression().accept(*this);
setLocation(_conditional);
assign(_conditional, _conditional.falseExpression());
appendCode() << "}\n" "default {\n";
_conditional.trueExpression().accept(*this);
setLocation(_conditional);
assign(_conditional, _conditional.trueExpression());
appendCode() << "}\n";
return false;
}
bool IRGeneratorForStatements::visit(Assignment const& _assignment)
{
_assignment.rightHandSide().accept(*this);
setLocation(_assignment);
Token assignmentOperator = _assignment.assignmentOperator();
Token binaryOperator =
assignmentOperator == Token::Assign ?
assignmentOperator :
TokenTraits::AssignmentToBinaryOp(assignmentOperator);
if (TokenTraits::isShiftOp(binaryOperator))
solAssert(type(_assignment.rightHandSide()).mobileType());
IRVariable value =
type(_assignment.leftHandSide()).isValueType() ?
convert(
_assignment.rightHandSide(),
TokenTraits::isShiftOp(binaryOperator) ? *type(_assignment.rightHandSide()).mobileType() : type(_assignment)
) :
_assignment.rightHandSide();
_assignment.leftHandSide().accept(*this);
solAssert(!!m_currentLValue, "LValue not retrieved.");
setLocation(_assignment);
if (assignmentOperator != Token::Assign)
{
solAssert(type(_assignment.leftHandSide()).isValueType(), "Compound operators only available for value types.");
solAssert(binaryOperator != Token::Exp);
solAssert(type(_assignment) == type(_assignment.leftHandSide()));
IRVariable leftIntermediate = readFromLValue(*m_currentLValue);
solAssert(type(_assignment) == leftIntermediate.type());
define(_assignment) << (
TokenTraits::isShiftOp(binaryOperator) ?
shiftOperation(binaryOperator, leftIntermediate, value) :
binaryOperation(binaryOperator, type(_assignment), leftIntermediate.name(), value.name())
) << "\n";
writeToLValue(*m_currentLValue, IRVariable(_assignment));
}
else
{
writeToLValue(*m_currentLValue, value);
if (dynamic_cast<ReferenceType const*>(&m_currentLValue->type))
define(_assignment, readFromLValue(*m_currentLValue));
else if (*_assignment.annotation().type != *TypeProvider::emptyTuple())
define(_assignment, value);
}
m_currentLValue.reset();
return false;
}
bool IRGeneratorForStatements::visit(TupleExpression const& _tuple)
{
setLocation(_tuple);
if (_tuple.isInlineArray())
{
auto const& arrayType = dynamic_cast<ArrayType const&>(*_tuple.annotation().type);
solAssert(!arrayType.isDynamicallySized(), "Cannot create dynamically sized inline array.");
define(_tuple) <<
m_utils.allocateMemoryArrayFunction(arrayType) <<
"(" <<
_tuple.components().size() <<
")\n";
std::string mpos = IRVariable(_tuple).part("mpos").name();
Type const& baseType = *arrayType.baseType();
for (size_t i = 0; i < _tuple.components().size(); i++)
{
Expression const& component = *_tuple.components()[i];
component.accept(*this);
setLocation(_tuple);
IRVariable converted = convert(component, baseType);
appendCode() <<
m_utils.writeToMemoryFunction(baseType) <<
"(" <<
("add(" + mpos + ", " + std::to_string(i * arrayType.memoryStride()) + ")") <<
", " <<
converted.commaSeparatedList() <<
")\n";
}
}
else
{
bool willBeWrittenTo = _tuple.annotation().willBeWrittenTo;
if (willBeWrittenTo)
solAssert(!m_currentLValue);
if (_tuple.components().size() == 1)
{
solAssert(_tuple.components().front());
_tuple.components().front()->accept(*this);
setLocation(_tuple);
if (willBeWrittenTo)
solAssert(!!m_currentLValue);
else
define(_tuple, *_tuple.components().front());
}
else
{
std::vector<std::optional<IRLValue>> lvalues;
for (size_t i = 0; i < _tuple.components().size(); ++i)
if (auto const& component = _tuple.components()[i])
{
component->accept(*this);
setLocation(_tuple);
if (willBeWrittenTo)
{
solAssert(!!m_currentLValue);
lvalues.emplace_back(std::move(m_currentLValue));
m_currentLValue.reset();
}
else
define(IRVariable(_tuple).tupleComponent(i), *component);
}
else if (willBeWrittenTo)
lvalues.emplace_back();
if (_tuple.annotation().willBeWrittenTo)
m_currentLValue.emplace(IRLValue{
*_tuple.annotation().type,
IRLValue::Tuple{std::move(lvalues)}
});
}
}
return false;
}
bool IRGeneratorForStatements::visit(Block const& _block)
{
if (_block.unchecked())
{
solAssert(m_context.arithmetic() == Arithmetic::Checked);
m_context.setArithmetic(Arithmetic::Wrapping);
}
return true;
}
void IRGeneratorForStatements::endVisit(Block const& _block)
{
if (_block.unchecked())
{
solAssert(m_context.arithmetic() == Arithmetic::Wrapping);
m_context.setArithmetic(Arithmetic::Checked);
}
}
bool IRGeneratorForStatements::visit(IfStatement const& _ifStatement)
{
_ifStatement.condition().accept(*this);
setLocation(_ifStatement);
std::string condition = expressionAsType(_ifStatement.condition(), *TypeProvider::boolean());
if (_ifStatement.falseStatement())
{
appendCode() << "switch " << condition << "\n" "case 0 {\n";
_ifStatement.falseStatement()->accept(*this);
setLocation(_ifStatement);
appendCode() << "}\n" "default {\n";
}
else
appendCode() << "if " << condition << " {\n";
_ifStatement.trueStatement().accept(*this);
setLocation(_ifStatement);
appendCode() << "}\n";
return false;
}
void IRGeneratorForStatements::endVisit(PlaceholderStatement const& _placeholder)
{
solAssert(m_placeholderCallback);
setLocation(_placeholder);
appendCode() << m_placeholderCallback();
}
bool IRGeneratorForStatements::visit(ForStatement const& _forStatement)
{
setLocation(_forStatement);
generateLoop(
_forStatement.body(),
_forStatement.condition(),
_forStatement.initializationExpression(),
_forStatement.loopExpression(),
false, // _isDoWhile
*_forStatement.annotation().isSimpleCounterLoop
);
return false;
}
bool IRGeneratorForStatements::visit(WhileStatement const& _whileStatement)
{
setLocation(_whileStatement);
generateLoop(
_whileStatement.body(),
&_whileStatement.condition(),
nullptr,
nullptr,
_whileStatement.isDoWhile()
);
return false;
}
bool IRGeneratorForStatements::visit(Continue const& _continue)
{
setLocation(_continue);
appendCode() << "continue\n";
return false;
}
bool IRGeneratorForStatements::visit(Break const& _break)
{
setLocation(_break);
appendCode() << "break\n";
return false;
}
void IRGeneratorForStatements::endVisit(Return const& _return)
{
setLocation(_return);
if (Expression const* value = _return.expression())
{
solAssert(_return.annotation().functionReturnParameters, "Invalid return parameters pointer.");
std::vector<ASTPointer<VariableDeclaration>> const& returnParameters =
_return.annotation().functionReturnParameters->parameters();
if (returnParameters.size() > 1)
for (size_t i = 0; i < returnParameters.size(); ++i)
assign(m_context.localVariable(*returnParameters[i]), IRVariable(*value).tupleComponent(i));
else if (returnParameters.size() == 1)
assign(m_context.localVariable(*returnParameters.front()), *value);
}
appendCode() << "leave\n";
}
bool IRGeneratorForStatements::visit(UnaryOperation const& _unaryOperation)
{
setLocation(_unaryOperation);
FunctionDefinition const* function = *_unaryOperation.annotation().userDefinedFunction;
if (function)
{
_unaryOperation.subExpression().accept(*this);
setLocation(_unaryOperation);
solAssert(function->isImplemented());
solAssert(function->isFree());
solAssert(function->parameters().size() == 1);
solAssert(function->returnParameters().size() == 1);
solAssert(*function->returnParameters()[0]->type() == *_unaryOperation.annotation().type);
std::string argument = expressionAsType(_unaryOperation.subExpression(), *function->parameters()[0]->type());
solAssert(!argument.empty());
solAssert(_unaryOperation.userDefinedFunctionType()->kind() == FunctionType::Kind::Internal);
define(_unaryOperation) <<
m_context.enqueueFunctionForCodeGeneration(*function) <<
("(" + argument + ")\n");
return false;
}
Type const& resultType = type(_unaryOperation);
Token const op = _unaryOperation.getOperator();
if (resultType.category() == Type::Category::RationalNumber)
{
define(_unaryOperation) << formatNumber(resultType.literalValue(nullptr)) << "\n";
return false;
}
_unaryOperation.subExpression().accept(*this);
setLocation(_unaryOperation);
if (op == Token::Delete)
{
solAssert(!!m_currentLValue, "LValue not retrieved.");
std::visit(
util::GenericVisitor{
[&](IRLValue::Storage const& _storage) {
appendCode() <<
m_utils.storageSetToZeroFunction(m_currentLValue->type) <<
"(" <<
_storage.slot <<
", " <<
_storage.offsetString() <<
")\n";
m_currentLValue.reset();
},
[&](auto const&) {
IRVariable zeroValue(m_context.newYulVariable(), m_currentLValue->type);
define(zeroValue) << m_utils.zeroValueFunction(m_currentLValue->type) << "()\n";
writeToLValue(*m_currentLValue, zeroValue);
m_currentLValue.reset();
}
},
m_currentLValue->kind
);
}
else if (resultType.category() == Type::Category::Integer)
{
solAssert(resultType == type(_unaryOperation.subExpression()), "Result type doesn't match!");
if (op == Token::Inc || op == Token::Dec)
{
solAssert(!!m_currentLValue, "LValue not retrieved.");
IRVariable modifiedValue(m_context.newYulVariable(), resultType);
IRVariable originalValue = readFromLValue(*m_currentLValue);
bool checked = m_context.arithmetic() == Arithmetic::Checked;
define(modifiedValue) <<
(op == Token::Inc ?
(checked ? m_utils.incrementCheckedFunction(resultType) : m_utils.incrementWrappingFunction(resultType)) :
(checked ? m_utils.decrementCheckedFunction(resultType) : m_utils.decrementWrappingFunction(resultType))
) <<
"(" <<
originalValue.name() <<
")\n";
writeToLValue(*m_currentLValue, modifiedValue);
m_currentLValue.reset();
define(_unaryOperation, _unaryOperation.isPrefixOperation() ? modifiedValue : originalValue);
}
else if (op == Token::BitNot)
appendSimpleUnaryOperation(_unaryOperation, _unaryOperation.subExpression());
else if (op == Token::Add)
// According to SyntaxChecker...
solAssert(false, "Use of unary + is disallowed.");
else if (op == Token::Sub)
{
IntegerType const& intType = *dynamic_cast<IntegerType const*>(&resultType);
define(_unaryOperation) << (
m_context.arithmetic() == Arithmetic::Checked ?
m_utils.negateNumberCheckedFunction(intType) :
m_utils.negateNumberWrappingFunction(intType)
) << "(" << IRVariable(_unaryOperation.subExpression()).name() << ")\n";
}
else
solUnimplemented("Unary operator not yet implemented");
}
else if (resultType.category() == Type::Category::FixedBytes)
{
solAssert(op == Token::BitNot, "Only bitwise negation is allowed for FixedBytes");
solAssert(resultType == type(_unaryOperation.subExpression()), "Result type doesn't match!");
appendSimpleUnaryOperation(_unaryOperation, _unaryOperation.subExpression());
}
else if (resultType.category() == Type::Category::Bool)
{
solAssert(
op != Token::BitNot,
"Bitwise Negation can't be done on bool!"
);
appendSimpleUnaryOperation(_unaryOperation, _unaryOperation.subExpression());
}
else
solUnimplemented("Unary operator not yet implemented");
return false;
}
void IRGeneratorForStatements::endVisit(RevertStatement const& _revertStatement)
{
ErrorDefinition const* error = dynamic_cast<ErrorDefinition const*>(ASTNode::referencedDeclaration(_revertStatement.errorCall().expression()));
solAssert(error);
revertWithError(
error->functionType(true)->externalSignature(),
error->functionType(true)->parameterTypes(),
_revertStatement.errorCall().sortedArguments()
);
}
bool IRGeneratorForStatements::visit(BinaryOperation const& _binOp)
{
setLocation(_binOp);
FunctionDefinition const* function = *_binOp.annotation().userDefinedFunction;
if (function)
{
_binOp.leftExpression().accept(*this);
_binOp.rightExpression().accept(*this);
setLocation(_binOp);
solAssert(function->isImplemented());
solAssert(function->isFree());
solAssert(function->parameters().size() == 2);
solAssert(function->returnParameters().size() == 1);
solAssert(*function->returnParameters()[0]->type() == *_binOp.annotation().type);
std::string left = expressionAsType(_binOp.leftExpression(), *function->parameters()[0]->type());
std::string right = expressionAsType(_binOp.rightExpression(), *function->parameters()[1]->type());
solAssert(!left.empty() && !right.empty());
solAssert(_binOp.userDefinedFunctionType()->kind() == FunctionType::Kind::Internal);
define(_binOp) <<
m_context.enqueueFunctionForCodeGeneration(*function) <<
("(" + left + ", " + right + ")\n");
return false;
}
solAssert(!!_binOp.annotation().commonType);
Type const* commonType = _binOp.annotation().commonType;
langutil::Token op = _binOp.getOperator();
if (op == Token::And || op == Token::Or)
{
// This can short-circuit!
appendAndOrOperatorCode(_binOp);
return false;
}
if (commonType->category() == Type::Category::RationalNumber)
{
define(_binOp) << toCompactHexWithPrefix(commonType->literalValue(nullptr)) << "\n";
return false; // skip sub-expressions
}
_binOp.leftExpression().accept(*this);
_binOp.rightExpression().accept(*this);
setLocation(_binOp);
if (TokenTraits::isCompareOp(op))
{
solAssert(commonType->isValueType());
bool isSigned = false;
if (auto type = dynamic_cast<IntegerType const*>(commonType))
isSigned = type->isSigned();
std::string args = expressionAsCleanedType(_binOp.leftExpression(), *commonType);
args += ", " + expressionAsCleanedType(_binOp.rightExpression(), *commonType);
auto functionType = dynamic_cast<FunctionType const*>(commonType);
solAssert(functionType ? (op == Token::Equal || op == Token::NotEqual) : true, "Invalid function pointer comparison!");
std::string expr;
if (functionType && functionType->kind() == FunctionType::Kind::External)
{
solUnimplementedAssert(functionType->sizeOnStack() == 2, "");
expr = m_utils.externalFunctionPointersEqualFunction() +
"(" +
IRVariable{_binOp.leftExpression()}.part("address").name() + "," +
IRVariable{_binOp.leftExpression()}.part("functionSelector").name() + "," +
IRVariable{_binOp.rightExpression()}.part("address").name() + "," +
IRVariable{_binOp.rightExpression()}.part("functionSelector").name() +
")";
if (op == Token::NotEqual)
expr = "iszero(" + expr + ")";
}
else if (op == Token::Equal)
expr = "eq(" + std::move(args) + ")";
else if (op == Token::NotEqual)
expr = "iszero(eq(" + std::move(args) + "))";
else if (op == Token::GreaterThanOrEqual)
expr = "iszero(" + std::string(isSigned ? "slt(" : "lt(") + std::move(args) + "))";
else if (op == Token::LessThanOrEqual)
expr = "iszero(" + std::string(isSigned ? "sgt(" : "gt(") + std::move(args) + "))";
else if (op == Token::GreaterThan)
expr = (isSigned ? "sgt(" : "gt(") + std::move(args) + ")";
else if (op == Token::LessThan)
expr = (isSigned ? "slt(" : "lt(") + std::move(args) + ")";
else
solAssert(false, "Unknown comparison operator.");
define(_binOp) << expr << "\n";
}
else if (op == Token::Exp)
{
IRVariable left = convert(_binOp.leftExpression(), *commonType);
IRVariable right = convert(_binOp.rightExpression(), *type(_binOp.rightExpression()).mobileType());
if (m_context.arithmetic() == Arithmetic::Wrapping)
define(_binOp) << m_utils.wrappingIntExpFunction(
dynamic_cast<IntegerType const&>(left.type()),
dynamic_cast<IntegerType const&>(right.type())
) << "(" << left.name() << ", " << right.name() << ")\n";
else if (auto rationalNumberType = dynamic_cast<RationalNumberType const*>(_binOp.leftExpression().annotation().type))
{
solAssert(rationalNumberType->integerType(), "Invalid literal as the base for exponentiation.");
solAssert(dynamic_cast<IntegerType const*>(commonType));
define(_binOp) << m_utils.overflowCheckedIntLiteralExpFunction(
*rationalNumberType,
dynamic_cast<IntegerType const&>(right.type()),
dynamic_cast<IntegerType const&>(*commonType)
) << "(" << right.name() << ")\n";
}
else
define(_binOp) << m_utils.overflowCheckedIntExpFunction(
dynamic_cast<IntegerType const&>(left.type()),
dynamic_cast<IntegerType const&>(right.type())
) << "(" << left.name() << ", " << right.name() << ")\n";
}
else if (TokenTraits::isShiftOp(op))
{
IRVariable left = convert(_binOp.leftExpression(), *commonType);
IRVariable right = convert(_binOp.rightExpression(), *type(_binOp.rightExpression()).mobileType());
define(_binOp) << shiftOperation(_binOp.getOperator(), left, right) << "\n";
}
else
{
std::string left = expressionAsType(_binOp.leftExpression(), *commonType);
std::string right = expressionAsType(_binOp.rightExpression(), *commonType);
define(_binOp) << binaryOperation(_binOp.getOperator(), *commonType, left, right) << "\n";
}
return false;
}
void IRGeneratorForStatements::endVisit(FunctionCall const& _functionCall)
{
setLocation(_functionCall);
auto functionCallKind = *_functionCall.annotation().kind;
if (functionCallKind == FunctionCallKind::TypeConversion)
{
solAssert(
_functionCall.expression().annotation().type->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 = nullptr;
if (functionCallKind == FunctionCallKind::StructConstructorCall)
{
auto const& type = dynamic_cast<TypeType const&>(*_functionCall.expression().annotation().type);
auto const& structType = dynamic_cast<StructType const&>(*type.actualType());
functionType = structType.constructorType();
}
else
functionType = dynamic_cast<FunctionType const*>(_functionCall.expression().annotation().type);
TypePointers parameterTypes = functionType->parameterTypes();
std::vector<ASTPointer<Expression const>> const& arguments = _functionCall.sortedArguments();
if (functionCallKind == FunctionCallKind::StructConstructorCall)
{
TypeType const& type = dynamic_cast<TypeType const&>(*_functionCall.expression().annotation().type);
auto const& structType = dynamic_cast<StructType const&>(*type.actualType());
define(_functionCall) << m_utils.allocateMemoryStructFunction(structType) << "()\n";
MemberList::MemberMap members = structType.nativeMembers(nullptr);
solAssert(members.size() == arguments.size(), "Struct parameter mismatch.");
for (size_t i = 0; i < arguments.size(); i++)
{