void CodeGenVisitor::JIT(Expression* e) {
StatementList* sl = new StatementList();
sl->addStatement(new ReturnStatement(e));
FunctionDefinition* fd = new FunctionDefinition(Type::INT, "", new ParameterList(), sl);
value_ = 0;
fd->accept(this);
if (!value_) {
delete fd;
throw "error evaluating expression";
}
llvm::Function* f = dynamic_cast<llvm::Function*>(value_);
void* fPtr = ee_->getPointerToFunction(f);
// some casting ... because we like magic
int (*fP)() = (int (*)())(intptr_t)fPtr;
std::cout << "Evaluated to: " << fP() << std::endl;
// throw it away
f->eraseFromParent();
}
void Compiler::appendBaseConstructor(FunctionDefinition const& _constructor)
{
CompilerContext::LocationSetter locationSetter(m_context, _constructor);
FunctionType constructorType(_constructor);
if (!constructorType.getParameterTypes().empty())
{
solAssert(m_baseArguments.count(&_constructor), "");
std::vector<ASTPointer<Expression>> const* arguments = m_baseArguments[&_constructor];
solAssert(arguments, "");
for (unsigned i = 0; i < arguments->size(); ++i)
compileExpression(*(arguments->at(i)), constructorType.getParameterTypes()[i]);
}
_constructor.accept(*this);
}
void Compiler::appendConstructor(FunctionDefinition const& _constructor)
{
CompilerContext::LocationSetter locationSetter(m_context, _constructor);
// copy constructor arguments from code to memory and then to stack, they are supplied after the actual program
if (!_constructor.getParameters().empty())
{
unsigned argumentSize = 0;
for (ASTPointer<VariableDeclaration> const& var: _constructor.getParameters())
if (var->getType()->isDynamicallySized())
{
argumentSize = 0;
break;
}
else
argumentSize += var->getType()->getCalldataEncodedSize();
CompilerUtils(m_context).fetchFreeMemoryPointer();
if (argumentSize == 0)
{
// argument size is dynamic, use CODESIZE to determine it
m_context.appendProgramSize(); // program itself
// CODESIZE is program plus manually added arguments
m_context << eth::Instruction::CODESIZE << eth::Instruction::SUB;
}
else
m_context << u256(argumentSize);
// stack: <memptr> <argument size>
m_context << eth::Instruction::DUP1;
m_context.appendProgramSize();
m_context << eth::Instruction::DUP4 << eth::Instruction::CODECOPY;
m_context << eth::Instruction::ADD;
CompilerUtils(m_context).storeFreeMemoryPointer();
appendCalldataUnpacker(
FunctionType(_constructor).getParameterTypes(),
true,
CompilerUtils::freeMemoryPointer + 0x20
);
}
_constructor.accept(*this);
}
