private void EmitVariable(LocalVariableDeclaration variable, CCodeBuilder code)
{
Requires.That(nameof(variable), variable.Exists, "tried to look up variable that does not exist");
var initializer = variable.IsParameter ? $" = {nameMangler.Mangle(variable.Name)}" : "";
code.AppendLine($"{typeConverter.Convert(variable.Type)} _{NameOf(variable.Reference)}{initializer}; // {variable}");
}
private void EmitVariable(VariableDeclaration declaration, CCodeBuilder code)
{
Requires.That(nameof(declaration), declaration.TypeIsNotEmpty, "tried to look up variable that does not exist");
var initializer = declaration.IsParameter ? $" = {(declaration.Symbol is SelfParameterSymbol ? nameMangler.SelfName : nameMangler.Mangle(declaration.Symbol!.Name!))}" : "";
code.AppendLine($"{typeConverter.Convert(declaration.Type)} _{declaration.Variable.Name}{initializer}; // {declaration}");
}
private void EmitBlock(BasicBlock block, bool voidReturn, CCodeBuilder code)
{
code.AppendLine($"bb{block.Number}:");
code.BeginBlock();
foreach (var statement in block.Statements)
{
EmitStatement(statement, voidReturn, code);
}
code.EndBlock();
}
private void EmitBlock(Block block, bool isConstructor, CCodeBuilder code)
{
code.AppendLine($"bb{block.Number}:");
code.BeginBlock();
foreach (var instruction in block.Instructions)
{
EmitInstruction(instruction, code);
}
EmitInstruction(block.Terminator, isConstructor, code);
code.EndBlock();
}
private void EmitInstruction(Instruction instruction, CCodeBuilder code)
{
code.AppendLine("// " + instruction);
switch (instruction)
{
default:
throw ExhaustiveMatch.Failed(instruction);
case InstructionWithResult ins:
EmitInstructionWithResult(ins, code);
break;
case CallInstruction ins:
{
if (!(ins.ResultPlace is null))
{
EmitResultPlace(ins.ResultPlace, code);
}
private void EmitStatement(Statement statement, bool voidReturn, CCodeBuilder code)
{
code.AppendLine("// " + statement);
switch (statement)
{
case IfStatement ifStatement:
code.AppendLine($"if({ConvertValue(ifStatement.Condition)}._value) goto bb{ifStatement.ThenBlockNumber}; else goto bb{ifStatement.ElseBlockNumber};");
break;
case GotoStatement gotoStatement:
code.AppendLine($"goto bb{gotoStatement.GotoBlockNumber};");
break;
case ReturnStatement _:
code.AppendLine(voidReturn ? "return;" : "return _result;");
break;
case AssignmentStatement assignment:
code.AppendLine(
$"{ConvertPlace(assignment.Place)} = {ConvertValue(assignment.Value)};");
break;
case ActionStatement action:
code.AppendLine(ConvertValue(action.Value) + ";");
break;
case DeleteStatement deleteStatement:
{
var self = ConvertValue(deleteStatement.Place);
var typeName = nameMangler.Mangle(deleteStatement.Type);
// TODO once deletes are implemented, call them
//code.AppendLine($"{self}._vtable->{typeName}___delete__1({self});");
code.AppendLine($"free({self}._self);");
break;
}
default:
throw NonExhaustiveMatchException.For(statement);
}
}
private void EmitFieldInitialization(FieldInitializationIL fieldInitialization, CCodeBuilder code)
{
var fieldName = nameMangler.Mangle(fieldInitialization.Field);
var parameterName = nameMangler.Mangle(fieldInitialization.Field.Name);
// Emit direct access to avoid any issues about whether corresponding variables exist
code.AppendLine($"_self._self->{fieldName} = {parameterName};");
}