nodes.cpp

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void ArrayNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_element);
}

RegisterID* ArrayNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    // FIXME: Should we put all of this code into emitNewArray?

    unsigned length = 0;
    ElementNode* firstPutElement;
    for (firstPutElement = m_element.get(); firstPutElement; firstPutElement = firstPutElement->next()) {
        if (firstPutElement->elision())
            break;
        ++length;
    }

    if (!firstPutElement && !m_elision)
        return generator.emitNewArray(generator.finalDestination(dst), m_element.get());

    RefPtr<RegisterID> array = generator.emitNewArray(generator.tempDestination(dst), m_element.get());

    for (ElementNode* n = firstPutElement; n; n = n->next()) {
        RegisterID* value = generator.emitNode(n->value());
        length += n->elision();
        generator.emitPutByIndex(array.get(), length++, value);
    }

    if (m_elision) {
        RegisterID* value = generator.emitLoad(0, jsNumber(generator.globalData(), m_elision + length));
        generator.emitPutById(array.get(), generator.propertyNames().length, value);
    }

    return generator.moveToDestinationIfNeeded(dst, array.get());
}

// ------------------------------ PropertyNode ----------------------------

PropertyNode::~PropertyNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void PropertyNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_assign);
}

// ------------------------------ ObjectLiteralNode ----------------------------

ObjectLiteralNode::~ObjectLiteralNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void ObjectLiteralNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_list);
}

RegisterID* ObjectLiteralNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
     if (!m_list) {
         if (dst == generator.ignoredResult())
             return 0;
         return generator.emitNewObject(generator.finalDestination(dst));
     }
     return generator.emitNode(dst, m_list.get());
}

// ------------------------------ PropertyListNode -----------------------------

PropertyListNode::~PropertyListNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void PropertyListNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_node);
    releaser.release(m_next);
}

RegisterID* PropertyListNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    RefPtr<RegisterID> newObj = generator.tempDestination(dst);
    
    generator.emitNewObject(newObj.get());
    
    for (PropertyListNode* p = this; p; p = p->m_next.get()) {
        RegisterID* value = generator.emitNode(p->m_node->m_assign.get());
        
        switch (p->m_node->m_type) {
            case PropertyNode::Constant: {
                generator.emitPutById(newObj.get(), p->m_node->name(), value);
                break;
            }
            case PropertyNode::Getter: {
                generator.emitPutGetter(newObj.get(), p->m_node->name(), value);
                break;
            }
            case PropertyNode::Setter: {
                generator.emitPutSetter(newObj.get(), p->m_node->name(), value);
                break;
            }
            default:
                ASSERT_NOT_REACHED();
        }
    }
    
    return generator.moveToDestinationIfNeeded(dst, newObj.get());
}

// ------------------------------ BracketAccessorNode --------------------------------

BracketAccessorNode::~BracketAccessorNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void BracketAccessorNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_base);
    releaser.release(m_subscript);
}

RegisterID* BracketAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base.get(), m_subscriptHasAssignments, m_subscript->isPure(generator));
    RegisterID* property = generator.emitNode(m_subscript.get());
    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
    return generator.emitGetByVal(generator.finalDestination(dst), base.get(), property);
}

// ------------------------------ DotAccessorNode --------------------------------

DotAccessorNode::~DotAccessorNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void DotAccessorNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_base);
}

RegisterID* DotAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    RegisterID* base = generator.emitNode(m_base.get());
    generator.emitExpressionInfo(divot(), startOffset(), endOffset());
    return generator.emitGetById(generator.finalDestination(dst), base, m_ident);
}

// ------------------------------ ArgumentListNode -----------------------------

ArgumentListNode::~ArgumentListNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void ArgumentListNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_next);
    releaser.release(m_expr);
}

RegisterID* ArgumentListNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    ASSERT(m_expr);
    return generator.emitNode(dst, m_expr.get());
}

// ------------------------------ ArgumentsNode -----------------------------

ArgumentsNode::~ArgumentsNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void ArgumentsNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_listNode);
}

// ------------------------------ NewExprNode ----------------------------------

NewExprNode::~NewExprNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void NewExprNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_expr);
    releaser.release(m_args);
}

RegisterID* NewExprNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    RefPtr<RegisterID> func = generator.emitNode(m_expr.get());
    return generator.emitConstruct(generator.finalDestination(dst), func.get(), m_args.get(), divot(), startOffset(), endOffset());
}

// ------------------------------ EvalFunctionCallNode ----------------------------------

EvalFunctionCallNode::~EvalFunctionCallNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void EvalFunctionCallNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_args);
}

RegisterID* EvalFunctionCallNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    RefPtr<RegisterID> func = generator.tempDestination(dst);
    RefPtr<RegisterID> thisRegister = generator.newTemporary();
    generator.emitExpressionInfo(divot() - startOffset() + 4, 4, 0);
    generator.emitResolveWithBase(thisRegister.get(), func.get(), generator.propertyNames().eval);
    return generator.emitCallEval(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args.get(), divot(), startOffset(), endOffset());
}

// ------------------------------ FunctionCallValueNode ----------------------------------

FunctionCallValueNode::~FunctionCallValueNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void FunctionCallValueNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_expr);
    releaser.release(m_args);
}

RegisterID* FunctionCallValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    RefPtr<RegisterID> func = generator.emitNode(m_expr.get());
    RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
    return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args.get(), divot(), startOffset(), endOffset());
}

// ------------------------------ FunctionCallResolveNode ----------------------------------

FunctionCallResolveNode::~FunctionCallResolveNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void FunctionCallResolveNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_args);
}

RegisterID* FunctionCallResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    if (RefPtr<RegisterID> local = generator.registerFor(m_ident)) {
        RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
        return generator.emitCall(generator.finalDestination(dst, thisRegister.get()), local.get(), thisRegister.get(), m_args.get(), divot(), startOffset(), endOffset());
    }

    int index = 0;
    size_t depth = 0;
    JSObject* globalObject = 0;
    if (generator.findScopedProperty(m_ident, index, depth, false, globalObject) && index != missingSymbolMarker()) {
        RefPtr<RegisterID> func = generator.emitGetScopedVar(generator.newTemporary(), depth, index, globalObject);
        RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
        return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args.get(), divot(), startOffset(), endOffset());
    }

    RefPtr<RegisterID> func = generator.newTemporary();
    RefPtr<RegisterID> thisRegister = generator.newTemporary();
    int identifierStart = divot() - startOffset();
    generator.emitExpressionInfo(identifierStart + m_ident.size(), m_ident.size(), 0);
    generator.emitResolveFunction(thisRegister.get(), func.get(), m_ident);
    return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args.get(), divot(), startOffset(), endOffset());
}

// ------------------------------ FunctionCallBracketNode ----------------------------------

FunctionCallBracketNode::~FunctionCallBracketNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void FunctionCallBracketNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_base);
    releaser.release(m_subscript);
    releaser.release(m_args);
}

RegisterID* FunctionCallBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    RefPtr<RegisterID> base = generator.emitNode(m_base.get());
    RegisterID* property = generator.emitNode(m_subscript.get());
    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
    RefPtr<RegisterID> function = generator.emitGetByVal(generator.tempDestination(dst), base.get(), property);
    RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
    return generator.emitCall(generator.finalDestination(dst, function.get()), function.get(), thisRegister.get(), m_args.get(), divot(), startOffset(), endOffset());
}

// ------------------------------ FunctionCallDotNode ----------------------------------

FunctionCallDotNode::~FunctionCallDotNode()
{
    NodeReleaser::releaseAllNodes(this);
}

void FunctionCallDotNode::releaseNodes(NodeReleaser& releaser)
{
    releaser.release(m_base);
    releaser.release(m_args);
}

RegisterID* FunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    RefPtr<RegisterID> base = generator.emitNode(m_base.get());
    generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
    RefPtr<RegisterID> function = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
    RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
    return generator.emitCall(generator.finalDestination(dst, function.get()), function.get(), thisRegister.get(), m_args.get(), divot(), startOffset(), endOffset());
}

// ------------------------------ PostfixResolveNode ----------------------------------

static RegisterID* emitPreIncOrDec(BytecodeGenerator& generator, RegisterID* srcDst, Operator oper)
{
    return (oper == OpPlusPlus) ? generator.emitPreInc(srcDst) : generator.emitPreDec(srcDst);
}

static RegisterID* emitPostIncOrDec(BytecodeGenerator& generator, RegisterID* dst, RegisterID* srcDst, Operator oper)
{
    return (oper == OpPlusPlus) ? generator.emitPostInc(dst, srcDst) : generator.emitPostDec(dst, srcDst);
}

RegisterID* PostfixResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
    if (RegisterID* local = generator.registerFor(m_ident)) {
        if (generator.isLocalConstant(m_ident)) {
            if (dst == generator.ignoredResult())
                return 0;
            return generator.emitToJSNumber(generator.finalDestination(dst), local);
        }

        if (dst == generator.ignoredResult())
            return emitPreIncOrDec(generator, local, m_operator);
        return emitPostIncOrDec(generator, generator.finalDestination(dst), local, m_operator);
    }

    int index = 0;
    size_t depth = 0;
    JSObject* globalObject = 0;
    if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
        RefPtr<RegisterID> value = generator.emitGetScopedVar(generator.newTemporary(), depth, index, globalObject);
        RegisterID* oldValue;
        if (dst == generator.ignoredResult()) {
            oldValue = 0;
            emitPreIncOrDec(generator, value.get(), m_operator);
        } else {
            oldValue = emitPostIncOrDec(generator, generator.finalDestination(dst), value.get(), m_operator);
        }
        generator.emitPutScopedVar(depth, index, value.get(), globalObject);
        return oldValue;
    }