internal int AddLexicalScope(LexicalScope scope)
{
int ret = lexicalScopes.Count;
this.lexicalScopes.Add(scope);
return(ret);
}
public void AddFunction(Function function)
{
// Store the function.
functions.Add(function);
// Register the local scopes.
for (int i = 0; i < function.GetLexicalScopeCount(); ++i)
{
LexicalScope scope = function.GetLexicalScope(i);
// Register the position filename.
TokenPosition pos = scope.Position;
if (pos == null)
{
pos = NullPosition;
}
AddFileName(pos.GetFileName());
}
// Register the variables names and positions.
foreach (LocalVariable local in function.GetLocals())
{
// Register the local name.
AddString(local.GetName());
// Register the position filename
TokenPosition localPos = local.Position;
if (localPos == null)
{
localPos = NullPosition;
}
AddFileName(localPos.GetFileName());
}
// Register the filenames.
string lastFilename = null;
foreach (BasicBlock bb in function.GetBasicBlocks())
{
foreach (Instruction instruction in bb.GetInstructions())
{
// Ignore instructions without position.
TokenPosition position = instruction.GetPosition();
if (position == null)
{
position = NullPosition;
}
// Set the filename.
string filename = position.GetFileName();
if (position != null && lastFilename != filename)
{
AddFileName(filename);
lastFilename = filename;
}
}
}
}
protected LexicalScope CreateLexicalScope(AstNode where, Function parentFunction)
{
LexicalScope ret = new LexicalScope(currentContainer, parentFunction);
ret.Position = where.GetPosition();
return ret;
}
internal int AddLexicalScope(LexicalScope scope)
{
int ret = lexicalScopes.Count;
this.lexicalScopes.Add(scope);
return ret;
}
private void PrepareReturning(AstNode where, Function function, LexicalScope scope)
{
// Get the definition node and check for generator.
FunctionDefinition defNode = function.DefinitionNode;
bool isGenerator = false;
if(defNode != null)
isGenerator = defNode.IsGenerator;
// Use standard return.
if(function.GetExceptionContext() == null && !isGenerator)
return;
// Create the return block.
BasicBlock returnBlock = new BasicBlock(function);
returnBlock.SetName("retBlock");
function.ReturnBlock = returnBlock;
// Create the return value local.
FunctionType functionType = function.GetFunctionType();
IChelaType retType = functionType.GetReturnType();
if(retType != ChelaType.GetVoidType() && !isGenerator)
function.ReturnValueVar = new LocalVariable(GenSym() + "_retval", scope, retType);
// Create the is returning flag.
function.ReturningVar = new LocalVariable(GenSym() + "_isret", scope, ChelaType.GetBoolType(), isGenerator);
function.ReturningVar.Type = LocalType.Return;
// Create the field for generators.
if(isGenerator)
{
FieldVariable returningField = new FieldVariable("returning", MemberFlags.Private,
ChelaType.GetBoolType(), defNode.GeneratorClass);
defNode.GeneratorClass.AddField(returningField);
function.ReturningVar.ActualVariable = returningField;
}
// Initializer the returning flag to false.
builder.CreateLoadBool(false);
PerformAssignment(where, function.ReturningVar);
}
private void DefineFunctionBody(FunctionDefinition node, Function function, LexicalScope topScope)
{
// Create the top basic block.
BasicBlock topBlock = CreateBasicBlock();
topBlock.SetName("top");
builder.SetBlock(topBlock);
// Prepare returning.
PrepareReturning(node, function, topScope);
// Store the arguments into local variables.
FunctionPrototype prototype = node.GetPrototype();
AstNode argument = prototype.GetArguments();
byte index = 0;
while(argument != null)
{
FunctionArgument argNode = (FunctionArgument) argument;
LocalVariable argVar = argNode.GetVariable();
if(argVar != null && !argVar.IsPseudoScope())
{
// Load the argument.
builder.CreateLoadArg(index);
// Store it into the local.
builder.CreateStoreLocal(argVar);
}
// Process the next argument.
argument = argument.GetNext();
index++;
}
// Generate constructor initialization.
if(function.IsConstructor())
{
Method ctor = (Method)function;
ConstructorInitializer ctorInit = prototype.GetConstructorInitializer();
if(ctorInit != null)
ctorInit.Accept(this);
else
CreateImplicitBaseConstructor(node, ctor);
// Initialize some field.
if(ctor.IsCtorLeaf())
{
Structure building = (Structure)ctor.GetParentScope();
GenerateFieldInitializations(node, building);
}
}
else if(function.IsStaticConstructor())
{
// Generate static field initialization.
Scope parent = function.GetParentScope();
Structure pbuilding = parent as Structure;
if(pbuilding != null)
GenerateStaticFieldInitializations(node, function, pbuilding);
}
// Visit his children.
VisitList(node.GetChildren());
// Finish return.
FinishReturn(node, function);
}
private void EmitFunctionDebugInfo(ModuleWriter writer, Function function)
{
// Emit the function id.
uint functionId = function.GetSerialId();
writer.Write(functionId);
// Emit the function position.
EmitPosition(writer, function.Position);
// Emit the lexical scopes.
byte numscopes = (byte)function.GetLexicalScopeCount();
writer.Write(numscopes);
for (int i = 0; i < numscopes; ++i)
{
// Get the lexical scope.
LexicalScope scope = function.GetLexicalScope(i);
// Find the parent index.
byte parentIndex = 0;
LexicalScope parentScope = scope.GetParentScope() as LexicalScope;
if (parentScope != null)
{
parentIndex = (byte)parentScope.Index;
}
// Emit the parent scope.
writer.Write(parentIndex);
// Write the scope position.
EmitPosition(writer, scope.Position);
}
// Emit the local data and positions.
ushort localCount = (ushort)function.GetLocalCount();
writer.Write(localCount);
foreach (LocalVariable local in function.GetLocals())
{
// Get the local scope.
byte localScope = 0;
LexicalScope scope = local.GetParentScope() as LexicalScope;
if (scope != null)
{
localScope = (byte)scope.Index;
}
// Write the variable data.
writer.Write(AddString(local.GetName()));
writer.Write(localScope);
writer.Write((byte)local.Type);
writer.Write((byte)local.ArgumentIndex);
EmitPosition(writer, local.Position);
}
// Emit each basic block position information.
ushort blockCount = (ushort)function.GetBasicBlockCount();
writer.Write(blockCount);
foreach (BasicBlock bb in function.GetBasicBlocks())
{
EmitBasicBlockDebugInfo(writer, bb);
}
}
