namespace JSC {
-static void substitute(UString& string, const UString& substring);
-// ------------------------------ ThrowableExpressionData --------------------------------
-
-static void substitute(UString& string, const UString& substring)
-{
- int position = string.find("%s");
- ASSERT(position != -1);
- UString newString = string.substr(0, position);
- newString.append(substring);
- newString.append(string.substr(position + 2));
- string = newString;
-}
-
-RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType e, const char* msg)
-{
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- RegisterID* exception = generator.emitNewError(generator.newTemporary(), e, jsString(generator.globalData(), msg));
- generator.emitThrow(exception);
- return exception;
-}
-
-RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType e, const char* msg, const Identifier& label)
-{
- UString message = msg;
- substitute(message, label.ustring());
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- RegisterID* exception = generator.emitNewError(generator.newTemporary(), e, jsString(generator.globalData(), message));
- generator.emitThrow(exception);
- return exception;
-}
-
-// ------------------------------ StatementNode --------------------------------
-
-void StatementNode::setLoc(int firstLine, int lastLine)
-{
- m_line = firstLine;
- m_lastLine = lastLine;
-}
-
-// ------------------------------ SourceElements --------------------------------
-
-void SourceElements::append(StatementNode* statement)
-{
- if (statement->isEmptyStatement())
- return;
- m_statements.append(statement);
-}
-
-// ------------------------------ NullNode -------------------------------------
-
-RegisterID* NullNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitLoad(dst, jsNull());
-}
-
-// ------------------------------ BooleanNode ----------------------------------
-
-RegisterID* BooleanNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitLoad(dst, m_value);
-}
-
-// ------------------------------ NumberNode -----------------------------------
-
-RegisterID* NumberNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitLoad(dst, m_double);
-}
-
-// ------------------------------ StringNode -----------------------------------
-
-RegisterID* StringNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitLoad(dst, m_value);
-}
-
-// ------------------------------ RegExpNode -----------------------------------
-
-RegisterID* RegExpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegExp> regExp = RegExp::create(generator.globalData(), m_pattern, m_flags);
- if (!regExp->isValid())
- return emitThrowError(generator, SyntaxError, ("Invalid regular expression: " + UString(regExp->errorMessage())).UTF8String().c_str());
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitNewRegExp(generator.finalDestination(dst), regExp.get());
-}
-
-// ------------------------------ ThisNode -------------------------------------
-
-RegisterID* ThisNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- return 0;
- return generator.moveToDestinationIfNeeded(dst, generator.thisRegister());
-}
-
-// ------------------------------ ResolveNode ----------------------------------
-
-bool ResolveNode::isPure(BytecodeGenerator& generator) const
-{
- return generator.isLocal(m_ident);
-}
-
-RegisterID* ResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (RegisterID* local = generator.registerFor(m_ident)) {
- if (dst == generator.ignoredResult())
- return 0;
- return generator.moveToDestinationIfNeeded(dst, local);
- }
-
- generator.emitExpressionInfo(m_startOffset + m_ident.size(), m_ident.size(), 0);
- return generator.emitResolve(generator.finalDestination(dst), m_ident);
-}
-
-// ------------------------------ ArrayNode ------------------------------------
-
-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; firstPutElement; firstPutElement = firstPutElement->next()) {
- if (firstPutElement->elision())
- break;
- ++length;
- }
-
- if (!firstPutElement && !m_elision)
- return generator.emitNewArray(generator.finalDestination(dst), m_element);
-
- RefPtr<RegisterID> array = generator.emitNewArray(generator.tempDestination(dst), m_element);
-
- 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());
-}
-
-bool ArrayNode::isSimpleArray() const
-{
- if (m_elision || m_optional)
- return false;
- for (ElementNode* ptr = m_element; ptr; ptr = ptr->next()) {
- if (ptr->elision())
- return false;
- }
- return true;
-}
-
-ArgumentListNode* ArrayNode::toArgumentList(JSGlobalData* globalData) const
-{
- ASSERT(!m_elision && !m_optional);
- ElementNode* ptr = m_element;
- if (!ptr)
- return 0;
- ArgumentListNode* head = new (globalData) ArgumentListNode(globalData, ptr->value());
- ArgumentListNode* tail = head;
- ptr = ptr->next();
- for (; ptr; ptr = ptr->next()) {
- ASSERT(!ptr->elision());
- tail = new (globalData) ArgumentListNode(globalData, tail, ptr->value());
- }
- return head;
-}
-
-// ------------------------------ ObjectLiteralNode ----------------------------
-
-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);
-}
-
-// ------------------------------ PropertyListNode -----------------------------
-
-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) {
- RegisterID* value = generator.emitNode(p->m_node->m_assign);
-
- 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 --------------------------------
-
-RegisterID* BracketAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments, m_subscript->isPure(generator));
- RegisterID* property = generator.emitNode(m_subscript);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitGetByVal(generator.finalDestination(dst), base.get(), property);
-}
-
-// ------------------------------ DotAccessorNode --------------------------------
-
-RegisterID* DotAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RegisterID* base = generator.emitNode(m_base);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitGetById(generator.finalDestination(dst), base, m_ident);
-}
-
-// ------------------------------ ArgumentListNode -----------------------------
-
-RegisterID* ArgumentListNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- ASSERT(m_expr);
- return generator.emitNode(dst, m_expr);
-}
-
-// ------------------------------ NewExprNode ----------------------------------
-
-RegisterID* NewExprNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> func = generator.emitNode(m_expr);
- return generator.emitConstruct(generator.finalDestination(dst), func.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ EvalFunctionCallNode ----------------------------------
-
-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, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ FunctionCallValueNode ----------------------------------
-
-RegisterID* FunctionCallValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> func = generator.emitNode(m_expr);
- RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsNull());
- return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ FunctionCallResolveNode ----------------------------------
-
-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, 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, 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.emitResolveWithBase(thisRegister.get(), func.get(), m_ident);
- return generator.emitCall(generator.finalDestination(dst, func.get()), func.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ FunctionCallBracketNode ----------------------------------
-
-RegisterID* FunctionCallBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
- RegisterID* property = generator.emitNode(m_subscript);
- 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, divot(), startOffset(), endOffset());
-}
-
-// ------------------------------ FunctionCallDotNode ----------------------------------
-
-RegisterID* FunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> function = generator.tempDestination(dst);
- RefPtr<RegisterID> thisRegister = generator.newTemporary();
- generator.emitNode(thisRegister.get(), m_base);
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
- generator.emitMethodCheck();
- generator.emitGetById(function.get(), thisRegister.get(), m_ident);
- return generator.emitCall(generator.finalDestination(dst, function.get()), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
-}
-
-RegisterID* CallFunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<Label> realCall = generator.newLabel();
- RefPtr<Label> end = generator.newLabel();
- RefPtr<RegisterID> base = generator.emitNode(m_base);
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
- RefPtr<RegisterID> function = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
- RefPtr<RegisterID> finalDestination = generator.finalDestination(dst, function.get());
- generator.emitJumpIfNotFunctionCall(function.get(), realCall.get());
- {
- RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
- RefPtr<RegisterID> thisRegister = generator.newTemporary();
- ArgumentListNode* oldList = m_args->m_listNode;
- if (m_args->m_listNode && m_args->m_listNode->m_expr) {
- generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
- m_args->m_listNode = m_args->m_listNode->m_next;
- } else
- generator.emitLoad(thisRegister.get(), jsNull());
-
- generator.emitCall(finalDestination.get(), realFunction.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
- generator.emitJump(end.get());
- m_args->m_listNode = oldList;
- }
- generator.emitLabel(realCall.get());
- {
- RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
- generator.emitCall(finalDestination.get(), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
- }
- generator.emitLabel(end.get());
- return finalDestination.get();
-}
-
-static bool areTrivialApplyArguments(ArgumentsNode* args)
-{
- return !args->m_listNode || !args->m_listNode->m_expr || !args->m_listNode->m_next
- || (!args->m_listNode->m_next->m_next && args->m_listNode->m_next->m_expr->isSimpleArray());
-}
-
-RegisterID* ApplyFunctionCallDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- // A few simple cases can be trivially handled as ordinary function calls.
- // function.apply(), function.apply(arg) -> identical to function.call
- // function.apply(thisArg, [arg0, arg1, ...]) -> can be trivially coerced into function.call(thisArg, arg0, arg1, ...) and saves object allocation
- bool mayBeCall = areTrivialApplyArguments(m_args);
-
- RefPtr<Label> realCall = generator.newLabel();
- RefPtr<Label> end = generator.newLabel();
- RefPtr<RegisterID> base = generator.emitNode(m_base);
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
- RefPtr<RegisterID> function = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
- RefPtr<RegisterID> finalDestination = generator.finalDestination(dst, function.get());
- generator.emitJumpIfNotFunctionApply(function.get(), realCall.get());
- {
- if (mayBeCall) {
- RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
- RefPtr<RegisterID> thisRegister = generator.newTemporary();
- ArgumentListNode* oldList = m_args->m_listNode;
- if (m_args->m_listNode && m_args->m_listNode->m_expr) {
- generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
- m_args->m_listNode = m_args->m_listNode->m_next;
- if (m_args->m_listNode) {
- ASSERT(m_args->m_listNode->m_expr->isSimpleArray());
- ASSERT(!m_args->m_listNode->m_next);
- m_args->m_listNode = static_cast<ArrayNode*>(m_args->m_listNode->m_expr)->toArgumentList(generator.globalData());
- }
- } else
- generator.emitLoad(thisRegister.get(), jsNull());
- generator.emitCall(finalDestination.get(), realFunction.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
- m_args->m_listNode = oldList;
- } else {
- ASSERT(m_args->m_listNode && m_args->m_listNode->m_next);
- RefPtr<RegisterID> realFunction = generator.emitMove(generator.newTemporary(), base.get());
- RefPtr<RegisterID> argsCountRegister = generator.newTemporary();
- RefPtr<RegisterID> thisRegister = generator.newTemporary();
- RefPtr<RegisterID> argsRegister = generator.newTemporary();
- generator.emitNode(thisRegister.get(), m_args->m_listNode->m_expr);
- ArgumentListNode* args = m_args->m_listNode->m_next;
- bool isArgumentsApply = false;
- if (args->m_expr->isResolveNode()) {
- ResolveNode* resolveNode = static_cast<ResolveNode*>(args->m_expr);
- isArgumentsApply = generator.willResolveToArguments(resolveNode->identifier());
- if (isArgumentsApply)
- generator.emitMove(argsRegister.get(), generator.uncheckedRegisterForArguments());
- }
- if (!isArgumentsApply)
- generator.emitNode(argsRegister.get(), args->m_expr);
- while ((args = args->m_next))
- generator.emitNode(args->m_expr);
-
- generator.emitLoadVarargs(argsCountRegister.get(), argsRegister.get());
- generator.emitCallVarargs(finalDestination.get(), realFunction.get(), thisRegister.get(), argsCountRegister.get(), divot(), startOffset(), endOffset());
- }
- generator.emitJump(end.get());
- }
- generator.emitLabel(realCall.get());
- {
- RefPtr<RegisterID> thisRegister = generator.emitMove(generator.newTemporary(), base.get());
- generator.emitCall(finalDestination.get(), function.get(), thisRegister.get(), m_args, divot(), startOffset(), endOffset());
- }
- generator.emitLabel(end.get());
- return finalDestination.get();
-}
-
-// ------------------------------ 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)
-{
- if (srcDst == dst)
- return generator.emitToJSNumber(dst, srcDst);
- 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;
- }
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- RefPtr<RegisterID> value = generator.newTemporary();
- RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), value.get(), m_ident);
- 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.emitPutById(base.get(), m_ident, value.get());
- return oldValue;
-}
-
-// ------------------------------ PostfixBracketNode ----------------------------------
-
-RegisterID* PostfixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
- RefPtr<RegisterID> property = generator.emitNode(m_subscript);
-
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
- RefPtr<RegisterID> value = generator.emitGetByVal(generator.newTemporary(), base.get(), property.get());
- RegisterID* oldValue;
- if (dst == generator.ignoredResult()) {
- oldValue = 0;
- if (m_operator == OpPlusPlus)
- generator.emitPreInc(value.get());
- else
- generator.emitPreDec(value.get());
- } else {
- oldValue = (m_operator == OpPlusPlus) ? generator.emitPostInc(generator.finalDestination(dst), value.get()) : generator.emitPostDec(generator.finalDestination(dst), value.get());
- }
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutByVal(base.get(), property.get(), value.get());
- return oldValue;
-}
-
-// ------------------------------ PostfixDotNode ----------------------------------
-
-RegisterID* PostfixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
-
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
- RefPtr<RegisterID> value = generator.emitGetById(generator.newTemporary(), base.get(), m_ident);
- RegisterID* oldValue;
- if (dst == generator.ignoredResult()) {
- oldValue = 0;
- if (m_operator == OpPlusPlus)
- generator.emitPreInc(value.get());
- else
- generator.emitPreDec(value.get());
- } else {
- oldValue = (m_operator == OpPlusPlus) ? generator.emitPostInc(generator.finalDestination(dst), value.get()) : generator.emitPostDec(generator.finalDestination(dst), value.get());
- }
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutById(base.get(), m_ident, value.get());
- return oldValue;
-}
-
-// ------------------------------ PostfixErrorNode -----------------------------------
-
-RegisterID* PostfixErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- return emitThrowError(generator, ReferenceError, m_operator == OpPlusPlus ? "Postfix ++ operator applied to value that is not a reference." : "Postfix -- operator applied to value that is not a reference.");
-}
-
-// ------------------------------ DeleteResolveNode -----------------------------------
-
-RegisterID* DeleteResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (generator.registerFor(m_ident))
- return generator.emitLoad(generator.finalDestination(dst), false);
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- RegisterID* base = generator.emitResolveBase(generator.tempDestination(dst), m_ident);
- return generator.emitDeleteById(generator.finalDestination(dst, base), base, m_ident);
-}
-
-// ------------------------------ DeleteBracketNode -----------------------------------
-
-RegisterID* DeleteBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> r0 = generator.emitNode(m_base);
- RegisterID* r1 = generator.emitNode(m_subscript);
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitDeleteByVal(generator.finalDestination(dst), r0.get(), r1);
-}
-
-// ------------------------------ DeleteDotNode -----------------------------------
-
-RegisterID* DeleteDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RegisterID* r0 = generator.emitNode(m_base);
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitDeleteById(generator.finalDestination(dst), r0, m_ident);
-}
-
-// ------------------------------ DeleteValueNode -----------------------------------
-
-RegisterID* DeleteValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitNode(generator.ignoredResult(), m_expr);
-
- // delete on a non-location expression ignores the value and returns true
- return generator.emitLoad(generator.finalDestination(dst), true);
-}
-
-// ------------------------------ VoidNode -------------------------------------
-
-RegisterID* VoidNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult()) {
- generator.emitNode(generator.ignoredResult(), m_expr);
- return 0;
- }
- RefPtr<RegisterID> r0 = generator.emitNode(m_expr);
- return generator.emitLoad(dst, jsUndefined());
-}
-
-// ------------------------------ TypeOfValueNode -----------------------------------
-
-RegisterID* TypeOfResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (RegisterID* local = generator.registerFor(m_ident)) {
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitTypeOf(generator.finalDestination(dst), local);
- }
-
- RefPtr<RegisterID> scratch = generator.emitResolveBase(generator.tempDestination(dst), m_ident);
- generator.emitGetById(scratch.get(), scratch.get(), m_ident);
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitTypeOf(generator.finalDestination(dst, scratch.get()), scratch.get());
-}
-
-// ------------------------------ TypeOfValueNode -----------------------------------
-
-RegisterID* TypeOfValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult()) {
- generator.emitNode(generator.ignoredResult(), m_expr);
- return 0;
- }
- RefPtr<RegisterID> src = generator.emitNode(m_expr);
- return generator.emitTypeOf(generator.finalDestination(dst), src.get());
-}
-
-// ------------------------------ PrefixResolveNode ----------------------------------
-
-RegisterID* PrefixResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (RegisterID* local = generator.registerFor(m_ident)) {
- if (generator.isLocalConstant(m_ident)) {
- if (dst == generator.ignoredResult())
- return 0;
- RefPtr<RegisterID> r0 = generator.emitLoad(generator.finalDestination(dst), (m_operator == OpPlusPlus) ? 1.0 : -1.0);
- return generator.emitBinaryOp(op_add, r0.get(), local, r0.get(), OperandTypes());
- }
-
- emitPreIncOrDec(generator, local, m_operator);
- return generator.moveToDestinationIfNeeded(dst, local);
- }
-
- int index = 0;
- size_t depth = 0;
- JSObject* globalObject = 0;
- if (generator.findScopedProperty(m_ident, index, depth, false, globalObject) && index != missingSymbolMarker()) {
- RefPtr<RegisterID> propDst = generator.emitGetScopedVar(generator.tempDestination(dst), depth, index, globalObject);
- emitPreIncOrDec(generator, propDst.get(), m_operator);
- generator.emitPutScopedVar(depth, index, propDst.get(), globalObject);
- return generator.moveToDestinationIfNeeded(dst, propDst.get());
- }
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- RefPtr<RegisterID> propDst = generator.tempDestination(dst);
- RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), propDst.get(), m_ident);
- emitPreIncOrDec(generator, propDst.get(), m_operator);
- generator.emitPutById(base.get(), m_ident, propDst.get());
- return generator.moveToDestinationIfNeeded(dst, propDst.get());
-}
-
-// ------------------------------ PrefixBracketNode ----------------------------------
-
-RegisterID* PrefixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
- RefPtr<RegisterID> property = generator.emitNode(m_subscript);
- RefPtr<RegisterID> propDst = generator.tempDestination(dst);
-
- generator.emitExpressionInfo(divot() + m_subexpressionDivotOffset, m_subexpressionStartOffset, endOffset() - m_subexpressionDivotOffset);
- RegisterID* value = generator.emitGetByVal(propDst.get(), base.get(), property.get());
- if (m_operator == OpPlusPlus)
- generator.emitPreInc(value);
- else
- generator.emitPreDec(value);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutByVal(base.get(), property.get(), value);
- return generator.moveToDestinationIfNeeded(dst, propDst.get());
-}
-
-// ------------------------------ PrefixDotNode ----------------------------------
-
-RegisterID* PrefixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
- RefPtr<RegisterID> propDst = generator.tempDestination(dst);
-
- generator.emitExpressionInfo(divot() + m_subexpressionDivotOffset, m_subexpressionStartOffset, endOffset() - m_subexpressionDivotOffset);
- RegisterID* value = generator.emitGetById(propDst.get(), base.get(), m_ident);
- if (m_operator == OpPlusPlus)
- generator.emitPreInc(value);
- else
- generator.emitPreDec(value);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutById(base.get(), m_ident, value);
- return generator.moveToDestinationIfNeeded(dst, propDst.get());
-}
-
-// ------------------------------ PrefixErrorNode -----------------------------------
-
-RegisterID* PrefixErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- return emitThrowError(generator, ReferenceError, m_operator == OpPlusPlus ? "Prefix ++ operator applied to value that is not a reference." : "Prefix -- operator applied to value that is not a reference.");
-}
-
-// ------------------------------ Unary Operation Nodes -----------------------------------
-
-RegisterID* UnaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RegisterID* src = generator.emitNode(m_expr);
- return generator.emitUnaryOp(opcodeID(), generator.finalDestination(dst), src);
-}
-
-// ------------------------------ Binary Operation Nodes -----------------------------------
-
-// BinaryOpNode::emitStrcat:
-//
-// This node generates an op_strcat operation. This opcode can handle concatenation of three or
-// more values, where we can determine a set of separate op_add operations would be operating on
-// string values.
-//
-// This function expects to be operating on a graph of AST nodes looking something like this:
-//
-// (a)... (b)
-// \ /
-// (+) (c)
-// \ /
-// [d] ((+))
-// \ /
-// [+=]
-//
-// The assignment operation is optional, if it exists the register holding the value on the
-// lefthand side of the assignment should be passing as the optional 'lhs' argument.
-//
-// The method should be called on the node at the root of the tree of regular binary add
-// operations (marked in the diagram with a double set of parentheses). This node must
-// be performing a string concatenation (determined by statically detecting that at least
-// one child must be a string).
-//
-// Since the minimum number of values being concatenated together is expected to be 3, if
-// a lhs to a concatenating assignment is not provided then the root add should have at
-// least one left child that is also an add that can be determined to be operating on strings.
-//
-RegisterID* BinaryOpNode::emitStrcat(BytecodeGenerator& generator, RegisterID* dst, RegisterID* lhs, ReadModifyResolveNode* emitExpressionInfoForMe)
-{
- ASSERT(isAdd());
- ASSERT(resultDescriptor().definitelyIsString());
-
- // Create a list of expressions for all the adds in the tree of nodes we can convert into
- // a string concatenation. The rightmost node (c) is added first. The rightmost node is
- // added first, and the leftmost child is never added, so the vector produced for the
- // example above will be [ c, b ].
- Vector<ExpressionNode*, 16> reverseExpressionList;
- reverseExpressionList.append(m_expr2);
-
- // Examine the left child of the add. So long as this is a string add, add its right-child
- // to the list, and keep processing along the left fork.
- ExpressionNode* leftMostAddChild = m_expr1;
- while (leftMostAddChild->isAdd() && leftMostAddChild->resultDescriptor().definitelyIsString()) {
- reverseExpressionList.append(static_cast<AddNode*>(leftMostAddChild)->m_expr2);
- leftMostAddChild = static_cast<AddNode*>(leftMostAddChild)->m_expr1;
- }
-
- Vector<RefPtr<RegisterID>, 16> temporaryRegisters;
-
- // If there is an assignment, allocate a temporary to hold the lhs after conversion.
- // We could possibly avoid this (the lhs is converted last anyway, we could let the
- // op_strcat node handle its conversion if required).
- if (lhs)
- temporaryRegisters.append(generator.newTemporary());
-
- // Emit code for the leftmost node ((a) in the example).
- temporaryRegisters.append(generator.newTemporary());
- RegisterID* leftMostAddChildTempRegister = temporaryRegisters.last().get();
- generator.emitNode(leftMostAddChildTempRegister, leftMostAddChild);
-
- // Note on ordering of conversions:
- //
- // We maintain the same ordering of conversions as we would see if the concatenations
- // was performed as a sequence of adds (otherwise this optimization could change
- // behaviour should an object have been provided a valueOf or toString method).
- //
- // Considering the above example, the sequnce of execution is:
- // * evaluate operand (a)
- // * evaluate operand (b)
- // * convert (a) to primitive <- (this would be triggered by the first add)
- // * convert (b) to primitive <- (ditto)
- // * evaluate operand (c)
- // * convert (c) to primitive <- (this would be triggered by the second add)
- // And optionally, if there is an assignment:
- // * convert (d) to primitive <- (this would be triggered by the assigning addition)
- //
- // As such we do not plant an op to convert the leftmost child now. Instead, use
- // 'leftMostAddChildTempRegister' as a flag to trigger generation of the conversion
- // once the second node has been generated. However, if the leftmost child is an
- // immediate we can trivially determine that no conversion will be required.
- // If this is the case
- if (leftMostAddChild->isString())
- leftMostAddChildTempRegister = 0;
-
- while (reverseExpressionList.size()) {
- ExpressionNode* node = reverseExpressionList.last();
- reverseExpressionList.removeLast();
-
- // Emit the code for the current node.
- temporaryRegisters.append(generator.newTemporary());
- generator.emitNode(temporaryRegisters.last().get(), node);
-
- // On the first iteration of this loop, when we first reach this point we have just
- // generated the second node, which means it is time to convert the leftmost operand.
- if (leftMostAddChildTempRegister) {
- generator.emitToPrimitive(leftMostAddChildTempRegister, leftMostAddChildTempRegister);
- leftMostAddChildTempRegister = 0; // Only do this once.
- }
- // Plant a conversion for this node, if necessary.
- if (!node->isString())
- generator.emitToPrimitive(temporaryRegisters.last().get(), temporaryRegisters.last().get());
- }
- ASSERT(temporaryRegisters.size() >= 3);
-
- // Certain read-modify nodes require expression info to be emitted *after* m_right has been generated.
- // If this is required the node is passed as 'emitExpressionInfoForMe'; do so now.
- if (emitExpressionInfoForMe)
- generator.emitExpressionInfo(emitExpressionInfoForMe->divot(), emitExpressionInfoForMe->startOffset(), emitExpressionInfoForMe->endOffset());
-
- // If there is an assignment convert the lhs now. This will also copy lhs to
- // the temporary register we allocated for it.
- if (lhs)
- generator.emitToPrimitive(temporaryRegisters[0].get(), lhs);
-
- return generator.emitStrcat(generator.finalDestination(dst, temporaryRegisters[0].get()), temporaryRegisters[0].get(), temporaryRegisters.size());
-}
-
-RegisterID* BinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- OpcodeID opcodeID = this->opcodeID();
-
- if (opcodeID == op_add && m_expr1->isAdd() && m_expr1->resultDescriptor().definitelyIsString())
- return emitStrcat(generator, dst);
-
- if (opcodeID == op_neq) {
- if (m_expr1->isNull() || m_expr2->isNull()) {
- RefPtr<RegisterID> src = generator.tempDestination(dst);
- generator.emitNode(src.get(), m_expr1->isNull() ? m_expr2 : m_expr1);
- return generator.emitUnaryOp(op_neq_null, generator.finalDestination(dst, src.get()), src.get());
- }
- }
-
- RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2);
- return generator.emitBinaryOp(opcodeID, generator.finalDestination(dst, src1.get()), src1.get(), src2, OperandTypes(m_expr1->resultDescriptor(), m_expr2->resultDescriptor()));
-}
-
-RegisterID* EqualNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (m_expr1->isNull() || m_expr2->isNull()) {
- RefPtr<RegisterID> src = generator.tempDestination(dst);
- generator.emitNode(src.get(), m_expr1->isNull() ? m_expr2 : m_expr1);
- return generator.emitUnaryOp(op_eq_null, generator.finalDestination(dst, src.get()), src.get());
- }
-
- RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2);
- return generator.emitEqualityOp(op_eq, generator.finalDestination(dst, src1.get()), src1.get(), src2);
-}
-
-RegisterID* StrictEqualNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2);
- return generator.emitEqualityOp(op_stricteq, generator.finalDestination(dst, src1.get()), src1.get(), src2);
-}
-
-RegisterID* ReverseBinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2);
- return generator.emitBinaryOp(opcodeID(), generator.finalDestination(dst, src1.get()), src2, src1.get(), OperandTypes(m_expr2->resultDescriptor(), m_expr1->resultDescriptor()));
-}
-
-RegisterID* ThrowableBinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitBinaryOp(opcodeID(), generator.finalDestination(dst, src1.get()), src1.get(), src2, OperandTypes(m_expr1->resultDescriptor(), m_expr2->resultDescriptor()));
-}
-
-RegisterID* InstanceOfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1, m_rightHasAssignments, m_expr2->isPure(generator));
- RefPtr<RegisterID> src2 = generator.emitNode(m_expr2);
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitGetByIdExceptionInfo(op_instanceof);
- RegisterID* src2Prototype = generator.emitGetById(generator.newTemporary(), src2.get(), generator.globalData()->propertyNames->prototype);
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitInstanceOf(generator.finalDestination(dst, src1.get()), src1.get(), src2.get(), src2Prototype);
-}
-
-// ------------------------------ LogicalOpNode ----------------------------
-
-RegisterID* LogicalOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> temp = generator.tempDestination(dst);
- RefPtr<Label> target = generator.newLabel();
-
- generator.emitNode(temp.get(), m_expr1);
- if (m_operator == OpLogicalAnd)
- generator.emitJumpIfFalse(temp.get(), target.get());
- else
- generator.emitJumpIfTrue(temp.get(), target.get());
- generator.emitNode(temp.get(), m_expr2);
- generator.emitLabel(target.get());
-
- return generator.moveToDestinationIfNeeded(dst, temp.get());
-}
-
-// ------------------------------ ConditionalNode ------------------------------
-
-RegisterID* ConditionalNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> newDst = generator.finalDestination(dst);
- RefPtr<Label> beforeElse = generator.newLabel();
- RefPtr<Label> afterElse = generator.newLabel();
-
- RegisterID* cond = generator.emitNode(m_logical);
- generator.emitJumpIfFalse(cond, beforeElse.get());
-
- generator.emitNode(newDst.get(), m_expr1);
- generator.emitJump(afterElse.get());
-
- generator.emitLabel(beforeElse.get());
- generator.emitNode(newDst.get(), m_expr2);
-
- generator.emitLabel(afterElse.get());
-
- return newDst.get();
-}
-
-// ------------------------------ ReadModifyResolveNode -----------------------------------
-
-// FIXME: should this be moved to be a method on BytecodeGenerator?
-static ALWAYS_INLINE RegisterID* emitReadModifyAssignment(BytecodeGenerator& generator, RegisterID* dst, RegisterID* src1, ExpressionNode* m_right, Operator oper, OperandTypes types, ReadModifyResolveNode* emitExpressionInfoForMe = 0)
-{
- OpcodeID opcodeID;
- switch (oper) {
- case OpMultEq:
- opcodeID = op_mul;
- break;
- case OpDivEq:
- opcodeID = op_div;
- break;
- case OpPlusEq:
- if (m_right->isAdd() && m_right->resultDescriptor().definitelyIsString())
- return static_cast<AddNode*>(m_right)->emitStrcat(generator, dst, src1, emitExpressionInfoForMe);
- opcodeID = op_add;
- break;
- case OpMinusEq:
- opcodeID = op_sub;
- break;
- case OpLShift:
- opcodeID = op_lshift;
- break;
- case OpRShift:
- opcodeID = op_rshift;
- break;
- case OpURShift:
- opcodeID = op_urshift;
- break;
- case OpAndEq:
- opcodeID = op_bitand;
- break;
- case OpXOrEq:
- opcodeID = op_bitxor;
- break;
- case OpOrEq:
- opcodeID = op_bitor;
- break;
- case OpModEq:
- opcodeID = op_mod;
- break;
- default:
- ASSERT_NOT_REACHED();
- return dst;
- }
-
- RegisterID* src2 = generator.emitNode(m_right);
-
- // Certain read-modify nodes require expression info to be emitted *after* m_right has been generated.
- // If this is required the node is passed as 'emitExpressionInfoForMe'; do so now.
- if (emitExpressionInfoForMe)
- generator.emitExpressionInfo(emitExpressionInfoForMe->divot(), emitExpressionInfoForMe->startOffset(), emitExpressionInfoForMe->endOffset());
-
- return generator.emitBinaryOp(opcodeID, dst, src1, src2, types);
-}
-
-RegisterID* ReadModifyResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (RegisterID* local = generator.registerFor(m_ident)) {
- if (generator.isLocalConstant(m_ident)) {
- return emitReadModifyAssignment(generator, generator.finalDestination(dst), local, m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- }
-
- if (generator.leftHandSideNeedsCopy(m_rightHasAssignments, m_right->isPure(generator))) {
- RefPtr<RegisterID> result = generator.newTemporary();
- generator.emitMove(result.get(), local);
- emitReadModifyAssignment(generator, result.get(), result.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- generator.emitMove(local, result.get());
- return generator.moveToDestinationIfNeeded(dst, result.get());
- }
-
- RegisterID* result = emitReadModifyAssignment(generator, local, local, m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- return generator.moveToDestinationIfNeeded(dst, result);
- }
-
- int index = 0;
- size_t depth = 0;
- JSObject* globalObject = 0;
- if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
- RefPtr<RegisterID> src1 = generator.emitGetScopedVar(generator.tempDestination(dst), depth, index, globalObject);
- RegisterID* result = emitReadModifyAssignment(generator, generator.finalDestination(dst, src1.get()), src1.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- generator.emitPutScopedVar(depth, index, result, globalObject);
- return result;
- }
-
- RefPtr<RegisterID> src1 = generator.tempDestination(dst);
- generator.emitExpressionInfo(divot() - startOffset() + m_ident.size(), m_ident.size(), 0);
- RefPtr<RegisterID> base = generator.emitResolveWithBase(generator.newTemporary(), src1.get(), m_ident);
- RegisterID* result = emitReadModifyAssignment(generator, generator.finalDestination(dst, src1.get()), src1.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()), this);
- return generator.emitPutById(base.get(), m_ident, result);
-}
-
-// ------------------------------ AssignResolveNode -----------------------------------
-
-RegisterID* AssignResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (RegisterID* local = generator.registerFor(m_ident)) {
- if (generator.isLocalConstant(m_ident))
- return generator.emitNode(dst, m_right);
-
- RegisterID* result = generator.emitNode(local, m_right);
- return generator.moveToDestinationIfNeeded(dst, result);
- }
-
- int index = 0;
- size_t depth = 0;
- JSObject* globalObject = 0;
- if (generator.findScopedProperty(m_ident, index, depth, true, globalObject) && index != missingSymbolMarker()) {
- if (dst == generator.ignoredResult())
- dst = 0;
- RegisterID* value = generator.emitNode(dst, m_right);
- generator.emitPutScopedVar(depth, index, value, globalObject);
- return value;
- }
-
- RefPtr<RegisterID> base = generator.emitResolveBase(generator.newTemporary(), m_ident);
- if (dst == generator.ignoredResult())
- dst = 0;
- RegisterID* value = generator.emitNode(dst, m_right);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitPutById(base.get(), m_ident, value);
-}
-
-// ------------------------------ AssignDotNode -----------------------------------
-
-RegisterID* AssignDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_rightHasAssignments, m_right->isPure(generator));
- RefPtr<RegisterID> value = generator.destinationForAssignResult(dst);
- RegisterID* result = generator.emitNode(value.get(), m_right);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutById(base.get(), m_ident, result);
- return generator.moveToDestinationIfNeeded(dst, result);
-}
-
-// ------------------------------ ReadModifyDotNode -----------------------------------
-
-RegisterID* ReadModifyDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_rightHasAssignments, m_right->isPure(generator));
-
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
- RefPtr<RegisterID> value = generator.emitGetById(generator.tempDestination(dst), base.get(), m_ident);
- RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitPutById(base.get(), m_ident, updatedValue);
-}
-
-// ------------------------------ AssignErrorNode -----------------------------------
-
-RegisterID* AssignErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- return emitThrowError(generator, ReferenceError, "Left side of assignment is not a reference.");
-}
-
-// ------------------------------ AssignBracketNode -----------------------------------
-
-RegisterID* AssignBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments || m_rightHasAssignments, m_subscript->isPure(generator) && m_right->isPure(generator));
- RefPtr<RegisterID> property = generator.emitNodeForLeftHandSide(m_subscript, m_rightHasAssignments, m_right->isPure(generator));
- RefPtr<RegisterID> value = generator.destinationForAssignResult(dst);
- RegisterID* result = generator.emitNode(value.get(), m_right);
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutByVal(base.get(), property.get(), result);
- return generator.moveToDestinationIfNeeded(dst, result);
-}
-
-// ------------------------------ ReadModifyBracketNode -----------------------------------
-
-RegisterID* ReadModifyBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments || m_rightHasAssignments, m_subscript->isPure(generator) && m_right->isPure(generator));
- RefPtr<RegisterID> property = generator.emitNodeForLeftHandSide(m_subscript, m_rightHasAssignments, m_right->isPure(generator));
-
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
- RefPtr<RegisterID> value = generator.emitGetByVal(generator.tempDestination(dst), base.get(), property.get());
- RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutByVal(base.get(), property.get(), updatedValue);
-
- return updatedValue;
-}
-
-// ------------------------------ CommaNode ------------------------------------
-
-RegisterID* CommaNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- ASSERT(m_expressions.size() > 1);
- for (size_t i = 0; i < m_expressions.size() - 1; i++)
- generator.emitNode(generator.ignoredResult(), m_expressions[i]);
- return generator.emitNode(dst, m_expressions.last());
-}
-
-// ------------------------------ ConstDeclNode ------------------------------------
-
-RegisterID* ConstDeclNode::emitCodeSingle(BytecodeGenerator& generator)
-{
- if (RegisterID* local = generator.constRegisterFor(m_ident)) {
- if (!m_init)
- return local;
-
- return generator.emitNode(local, m_init);
- }
-
- // FIXME: While this code should only be hit in eval code, it will potentially
- // assign to the wrong base if m_ident exists in an intervening dynamic scope.
- RefPtr<RegisterID> base = generator.emitResolveBase(generator.newTemporary(), m_ident);
- RegisterID* value = m_init ? generator.emitNode(m_init) : generator.emitLoad(0, jsUndefined());
- return generator.emitPutById(base.get(), m_ident, value);
-}
-
-RegisterID* ConstDeclNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- RegisterID* result = 0;
- for (ConstDeclNode* n = this; n; n = n->m_next)
- result = n->emitCodeSingle(generator);
-
- return result;
-}
-
-// ------------------------------ ConstStatementNode -----------------------------
-
-RegisterID* ConstStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- return generator.emitNode(m_next);
-}
-
-// ------------------------------ Helper functions for handling Vectors of StatementNode -------------------------------
-
-static inline void statementListEmitCode(const StatementVector& statements, BytecodeGenerator& generator, RegisterID* dst)
-{
- size_t size = statements.size();
- for (size_t i = 0; i < size; ++i)
- generator.emitNode(dst, statements[i]);
-}
-
-// ------------------------------ BlockNode ------------------------------------
-
-RegisterID* BlockNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- statementListEmitCode(m_children, generator, dst);
- return 0;
-}
-
-// ------------------------------ EmptyStatementNode ---------------------------
-
-RegisterID* EmptyStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- return dst;
-}
-
-// ------------------------------ DebuggerStatementNode ---------------------------
-
-RegisterID* DebuggerStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(DidReachBreakpoint, firstLine(), lastLine());
- return dst;
-}
-
-// ------------------------------ ExprStatementNode ----------------------------
-
-RegisterID* ExprStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- ASSERT(m_expr);
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- return generator.emitNode(dst, m_expr);
-}
-
-// ------------------------------ VarStatementNode ----------------------------
-
-RegisterID* VarStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- ASSERT(m_expr);
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- return generator.emitNode(m_expr);
-}
-
-// ------------------------------ IfNode ---------------------------------------
-
-RegisterID* IfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- RefPtr<Label> afterThen = generator.newLabel();
-
- RegisterID* cond = generator.emitNode(m_condition);
- generator.emitJumpIfFalse(cond, afterThen.get());
-
- generator.emitNode(dst, m_ifBlock);
- generator.emitLabel(afterThen.get());
-
- // FIXME: This should return the last statement executed so that it can be returned as a Completion.
- return 0;
-}
-
-// ------------------------------ IfElseNode ---------------------------------------
-
-RegisterID* IfElseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- RefPtr<Label> beforeElse = generator.newLabel();
- RefPtr<Label> afterElse = generator.newLabel();
-
- RegisterID* cond = generator.emitNode(m_condition);
- generator.emitJumpIfFalse(cond, beforeElse.get());
-
- generator.emitNode(dst, m_ifBlock);
- generator.emitJump(afterElse.get());
-
- generator.emitLabel(beforeElse.get());
-
- generator.emitNode(dst, m_elseBlock);
-
- generator.emitLabel(afterElse.get());
-
- // FIXME: This should return the last statement executed so that it can be returned as a Completion.
- return 0;
-}
-
-// ------------------------------ DoWhileNode ----------------------------------
-
-RegisterID* DoWhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-
- RefPtr<Label> topOfLoop = generator.newLabel();
- generator.emitLabel(topOfLoop.get());
-
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- RefPtr<RegisterID> result = generator.emitNode(dst, m_statement);
-
- generator.emitLabel(scope->continueTarget());
- generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
- RegisterID* cond = generator.emitNode(m_expr);
- generator.emitJumpIfTrue(cond, topOfLoop.get());
-
- generator.emitLabel(scope->breakTarget());
- return result.get();
-}
-
-// ------------------------------ WhileNode ------------------------------------
-
-RegisterID* WhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-
- generator.emitJump(scope->continueTarget());
-
- RefPtr<Label> topOfLoop = generator.newLabel();
- generator.emitLabel(topOfLoop.get());
-
- generator.emitNode(dst, m_statement);
-
- generator.emitLabel(scope->continueTarget());
- generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
- RegisterID* cond = generator.emitNode(m_expr);
- generator.emitJumpIfTrue(cond, topOfLoop.get());
-
- generator.emitLabel(scope->breakTarget());
-
- // FIXME: This should return the last statement executed so that it can be returned as a Completion
- return 0;
-}
-
-// ------------------------------ ForNode --------------------------------------
-
-RegisterID* ForNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- if (m_expr1)
- generator.emitNode(generator.ignoredResult(), m_expr1);
-
- RefPtr<Label> condition = generator.newLabel();
- generator.emitJump(condition.get());
-
- RefPtr<Label> topOfLoop = generator.newLabel();
- generator.emitLabel(topOfLoop.get());
-
- RefPtr<RegisterID> result = generator.emitNode(dst, m_statement);
-
- generator.emitLabel(scope->continueTarget());
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- if (m_expr3)
- generator.emitNode(generator.ignoredResult(), m_expr3);
-
- generator.emitLabel(condition.get());
- if (m_expr2) {
- RegisterID* cond = generator.emitNode(m_expr2);
- generator.emitJumpIfTrue(cond, topOfLoop.get());
- } else
- generator.emitJump(topOfLoop.get());
-
- generator.emitLabel(scope->breakTarget());
- return result.get();
-}
-
-// ------------------------------ ForInNode ------------------------------------
-
-RegisterID* ForInNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-
- if (!m_lexpr->isLocation())
- return emitThrowError(generator, ReferenceError, "Left side of for-in statement is not a reference.");
-
- RefPtr<Label> continueTarget = generator.newLabel();
-
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- if (m_init)
- generator.emitNode(generator.ignoredResult(), m_init);
- RegisterID* forInBase = generator.emitNode(m_expr);
- RefPtr<RegisterID> iter = generator.emitGetPropertyNames(generator.newTemporary(), forInBase);
- generator.emitJump(scope->continueTarget());
-
- RefPtr<Label> loopStart = generator.newLabel();
- generator.emitLabel(loopStart.get());
-
- RegisterID* propertyName;
- if (m_lexpr->isResolveNode()) {
- const Identifier& ident = static_cast<ResolveNode*>(m_lexpr)->identifier();
- propertyName = generator.registerFor(ident);
- if (!propertyName) {
- propertyName = generator.newTemporary();
- RefPtr<RegisterID> protect = propertyName;
- RegisterID* base = generator.emitResolveBase(generator.newTemporary(), ident);
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutById(base, ident, propertyName);
- }
- } else if (m_lexpr->isDotAccessorNode()) {
- DotAccessorNode* assignNode = static_cast<DotAccessorNode*>(m_lexpr);
- const Identifier& ident = assignNode->identifier();
- propertyName = generator.newTemporary();
- RefPtr<RegisterID> protect = propertyName;
- RegisterID* base = generator.emitNode(assignNode->base());
-
- generator.emitExpressionInfo(assignNode->divot(), assignNode->startOffset(), assignNode->endOffset());
- generator.emitPutById(base, ident, propertyName);
- } else {
- ASSERT(m_lexpr->isBracketAccessorNode());
- BracketAccessorNode* assignNode = static_cast<BracketAccessorNode*>(m_lexpr);
- propertyName = generator.newTemporary();
- RefPtr<RegisterID> protect = propertyName;
- RefPtr<RegisterID> base = generator.emitNode(assignNode->base());
- RegisterID* subscript = generator.emitNode(assignNode->subscript());
-
- generator.emitExpressionInfo(assignNode->divot(), assignNode->startOffset(), assignNode->endOffset());
- generator.emitPutByVal(base.get(), subscript, propertyName);
- }
-
- generator.emitNode(dst, m_statement);
-
- generator.emitLabel(scope->continueTarget());
- generator.emitNextPropertyName(propertyName, iter.get(), loopStart.get());
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- generator.emitLabel(scope->breakTarget());
- return dst;
-}
-
-// ------------------------------ ContinueNode ---------------------------------
-
-// ECMA 12.7
-RegisterID* ContinueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- LabelScope* scope = generator.continueTarget(m_ident);
-
- if (!scope)
- return m_ident.isEmpty()
- ? emitThrowError(generator, SyntaxError, "Invalid continue statement.")
- : emitThrowError(generator, SyntaxError, "Undefined label: '%s'.", m_ident);
-
- generator.emitJumpScopes(scope->continueTarget(), scope->scopeDepth());
- return dst;
-}
-
-// ------------------------------ BreakNode ------------------------------------
-
-// ECMA 12.8
-RegisterID* BreakNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- LabelScope* scope = generator.breakTarget(m_ident);
-
- if (!scope)
- return m_ident.isEmpty()
- ? emitThrowError(generator, SyntaxError, "Invalid break statement.")
- : emitThrowError(generator, SyntaxError, "Undefined label: '%s'.", m_ident);
-
- generator.emitJumpScopes(scope->breakTarget(), scope->scopeDepth());
- return dst;
-}
-
-// ------------------------------ ReturnNode -----------------------------------
-
-RegisterID* ReturnNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- if (generator.codeType() != FunctionCode)
- return emitThrowError(generator, SyntaxError, "Invalid return statement.");
-
- if (dst == generator.ignoredResult())
- dst = 0;
- RegisterID* r0 = m_value ? generator.emitNode(dst, m_value) : generator.emitLoad(dst, jsUndefined());
- RefPtr<RegisterID> returnRegister;
- if (generator.scopeDepth()) {
- RefPtr<Label> l0 = generator.newLabel();
- if (generator.hasFinaliser() && !r0->isTemporary()) {
- returnRegister = generator.emitMove(generator.newTemporary(), r0);
- r0 = returnRegister.get();
- }
- generator.emitJumpScopes(l0.get(), 0);
- generator.emitLabel(l0.get());
- }
- generator.emitDebugHook(WillLeaveCallFrame, firstLine(), lastLine());
- return generator.emitReturn(r0);
-}
-
-// ------------------------------ WithNode -------------------------------------
-
-RegisterID* WithNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- RefPtr<RegisterID> scope = generator.newTemporary();
- generator.emitNode(scope.get(), m_expr); // scope must be protected until popped
- generator.emitExpressionInfo(m_divot, m_expressionLength, 0);
- generator.emitPushScope(scope.get());
- RegisterID* result = generator.emitNode(dst, m_statement);
- generator.emitPopScope();
- return result;
-}
-
-// ------------------------------ CaseBlockNode --------------------------------
-
-enum SwitchKind {
- SwitchUnset = 0,
- SwitchNumber = 1,
- SwitchString = 2,
- SwitchNeither = 3
-};
-
-static void processClauseList(ClauseListNode* list, Vector<ExpressionNode*, 8>& literalVector, SwitchKind& typeForTable, bool& singleCharacterSwitch, int32_t& min_num, int32_t& max_num)
-{
- for (; list; list = list->getNext()) {
- ExpressionNode* clauseExpression = list->getClause()->expr();
- literalVector.append(clauseExpression);
- if (clauseExpression->isNumber()) {
- double value = static_cast<NumberNode*>(clauseExpression)->value();
- int32_t intVal = static_cast<int32_t>(value);
- if ((typeForTable & ~SwitchNumber) || (intVal != value)) {
- typeForTable = SwitchNeither;
- break;
- }
- if (intVal < min_num)
- min_num = intVal;
- if (intVal > max_num)
- max_num = intVal;
- typeForTable = SwitchNumber;
- continue;
- }
- if (clauseExpression->isString()) {
- if (typeForTable & ~SwitchString) {
- typeForTable = SwitchNeither;
- break;
- }
- const UString& value = static_cast<StringNode*>(clauseExpression)->value().ustring();
- if (singleCharacterSwitch &= value.size() == 1) {
- int32_t intVal = value.rep()->data()[0];
- if (intVal < min_num)
- min_num = intVal;
- if (intVal > max_num)
- max_num = intVal;
- }
- typeForTable = SwitchString;
- continue;
- }
- typeForTable = SwitchNeither;
- break;
- }
-}
-
-SwitchInfo::SwitchType CaseBlockNode::tryOptimizedSwitch(Vector<ExpressionNode*, 8>& literalVector, int32_t& min_num, int32_t& max_num)
-{
- SwitchKind typeForTable = SwitchUnset;
- bool singleCharacterSwitch = true;
-
- processClauseList(m_list1, literalVector, typeForTable, singleCharacterSwitch, min_num, max_num);
- processClauseList(m_list2, literalVector, typeForTable, singleCharacterSwitch, min_num, max_num);
-
- if (typeForTable == SwitchUnset || typeForTable == SwitchNeither)
- return SwitchInfo::SwitchNone;
-
- if (typeForTable == SwitchNumber) {
- int32_t range = max_num - min_num;
- if (min_num <= max_num && range <= 1000 && (range / literalVector.size()) < 10)
- return SwitchInfo::SwitchImmediate;
- return SwitchInfo::SwitchNone;
- }
-
- ASSERT(typeForTable == SwitchString);
-
- if (singleCharacterSwitch) {
- int32_t range = max_num - min_num;
- if (min_num <= max_num && range <= 1000 && (range / literalVector.size()) < 10)
- return SwitchInfo::SwitchCharacter;
- }
-
- return SwitchInfo::SwitchString;
-}
-
-RegisterID* CaseBlockNode::emitBytecodeForBlock(BytecodeGenerator& generator, RegisterID* switchExpression, RegisterID* dst)
-{
- RefPtr<Label> defaultLabel;
- Vector<RefPtr<Label>, 8> labelVector;
- Vector<ExpressionNode*, 8> literalVector;
- int32_t min_num = std::numeric_limits<int32_t>::max();
- int32_t max_num = std::numeric_limits<int32_t>::min();
- SwitchInfo::SwitchType switchType = tryOptimizedSwitch(literalVector, min_num, max_num);
-
- if (switchType != SwitchInfo::SwitchNone) {
- // Prepare the various labels
- for (uint32_t i = 0; i < literalVector.size(); i++)
- labelVector.append(generator.newLabel());
- defaultLabel = generator.newLabel();
- generator.beginSwitch(switchExpression, switchType);
- } else {
- // Setup jumps
- for (ClauseListNode* list = m_list1; list; list = list->getNext()) {
- RefPtr<RegisterID> clauseVal = generator.newTemporary();
- generator.emitNode(clauseVal.get(), list->getClause()->expr());
- generator.emitBinaryOp(op_stricteq, clauseVal.get(), clauseVal.get(), switchExpression, OperandTypes());
- labelVector.append(generator.newLabel());
- generator.emitJumpIfTrue(clauseVal.get(), labelVector[labelVector.size() - 1].get());
- }
-
- for (ClauseListNode* list = m_list2; list; list = list->getNext()) {
- RefPtr<RegisterID> clauseVal = generator.newTemporary();
- generator.emitNode(clauseVal.get(), list->getClause()->expr());
- generator.emitBinaryOp(op_stricteq, clauseVal.get(), clauseVal.get(), switchExpression, OperandTypes());
- labelVector.append(generator.newLabel());
- generator.emitJumpIfTrue(clauseVal.get(), labelVector[labelVector.size() - 1].get());
- }
- defaultLabel = generator.newLabel();
- generator.emitJump(defaultLabel.get());
- }
-
- RegisterID* result = 0;
-
- size_t i = 0;
- for (ClauseListNode* list = m_list1; list; list = list->getNext()) {
- generator.emitLabel(labelVector[i++].get());
- statementListEmitCode(list->getClause()->children(), generator, dst);
- }
-
- if (m_defaultClause) {
- generator.emitLabel(defaultLabel.get());
- statementListEmitCode(m_defaultClause->children(), generator, dst);
- }
-
- for (ClauseListNode* list = m_list2; list; list = list->getNext()) {
- generator.emitLabel(labelVector[i++].get());
- statementListEmitCode(list->getClause()->children(), generator, dst);
- }
- if (!m_defaultClause)
- generator.emitLabel(defaultLabel.get());
-
- ASSERT(i == labelVector.size());
- if (switchType != SwitchInfo::SwitchNone) {
- ASSERT(labelVector.size() == literalVector.size());
- generator.endSwitch(labelVector.size(), labelVector.data(), literalVector.data(), defaultLabel.get(), min_num, max_num);
- }
- return result;
-}
-
-// ------------------------------ SwitchNode -----------------------------------
-
-RegisterID* SwitchNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Switch);
-
- RefPtr<RegisterID> r0 = generator.emitNode(m_expr);
- RegisterID* r1 = m_block->emitBytecodeForBlock(generator, r0.get(), dst);
-
- generator.emitLabel(scope->breakTarget());
- return r1;
-}
-
-// ------------------------------ LabelNode ------------------------------------
+// ------------------------------ StatementNode --------------------------------
-RegisterID* LabelNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void StatementNode::setLoc(int firstLine, int lastLine)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- if (generator.breakTarget(m_name))
- return emitThrowError(generator, SyntaxError, "Duplicate label: %s.", m_name);
-
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::NamedLabel, &m_name);
- RegisterID* r0 = generator.emitNode(dst, m_statement);
-
- generator.emitLabel(scope->breakTarget());
- return r0;
+ m_line = firstLine;
+ m_lastLine = lastLine;
}
-// ------------------------------ ThrowNode ------------------------------------
+// ------------------------------ SourceElements --------------------------------
-RegisterID* ThrowNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void SourceElements::append(StatementNode* statement)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- if (dst == generator.ignoredResult())
- dst = 0;
- RefPtr<RegisterID> expr = generator.emitNode(m_expr);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitThrow(expr.get());
- return 0;
+ if (statement->isEmptyStatement())
+ return;
+ m_statements.append(statement);
}
-// ------------------------------ TryNode --------------------------------------
-
-RegisterID* TryNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+inline StatementNode* SourceElements::singleStatement() const
{
- // NOTE: The catch and finally blocks must be labeled explicitly, so the
- // optimizer knows they may be jumped to from anywhere.
-
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- RefPtr<Label> tryStartLabel = generator.newLabel();
- RefPtr<Label> finallyStart;
- RefPtr<RegisterID> finallyReturnAddr;
- if (m_finallyBlock) {
- finallyStart = generator.newLabel();
- finallyReturnAddr = generator.newTemporary();
- generator.pushFinallyContext(finallyStart.get(), finallyReturnAddr.get());
- }
-
- generator.emitLabel(tryStartLabel.get());
- generator.emitNode(dst, m_tryBlock);
-
- if (m_catchBlock) {
- RefPtr<Label> catchEndLabel = generator.newLabel();
-
- // Normal path: jump over the catch block.
- generator.emitJump(catchEndLabel.get());
-
- // Uncaught exception path: the catch block.
- RefPtr<Label> here = generator.emitLabel(generator.newLabel().get());
- RefPtr<RegisterID> exceptionRegister = generator.emitCatch(generator.newTemporary(), tryStartLabel.get(), here.get());
- if (m_catchHasEval) {
- RefPtr<RegisterID> dynamicScopeObject = generator.emitNewObject(generator.newTemporary());
- generator.emitPutById(dynamicScopeObject.get(), m_exceptionIdent, exceptionRegister.get());
- generator.emitMove(exceptionRegister.get(), dynamicScopeObject.get());
- generator.emitPushScope(exceptionRegister.get());
- } else
- generator.emitPushNewScope(exceptionRegister.get(), m_exceptionIdent, exceptionRegister.get());
- generator.emitNode(dst, m_catchBlock);
- generator.emitPopScope();
- generator.emitLabel(catchEndLabel.get());
- }
-
- if (m_finallyBlock) {
- generator.popFinallyContext();
- // there may be important registers live at the time we jump
- // to a finally block (such as for a return or throw) so we
- // ref the highest register ever used as a conservative
- // approach to not clobbering anything important
- RefPtr<RegisterID> highestUsedRegister = generator.highestUsedRegister();
- RefPtr<Label> finallyEndLabel = generator.newLabel();
-
- // Normal path: invoke the finally block, then jump over it.
- generator.emitJumpSubroutine(finallyReturnAddr.get(), finallyStart.get());
- generator.emitJump(finallyEndLabel.get());
-
- // Uncaught exception path: invoke the finally block, then re-throw the exception.
- RefPtr<Label> here = generator.emitLabel(generator.newLabel().get());
- RefPtr<RegisterID> tempExceptionRegister = generator.emitCatch(generator.newTemporary(), tryStartLabel.get(), here.get());
- generator.emitJumpSubroutine(finallyReturnAddr.get(), finallyStart.get());
- generator.emitThrow(tempExceptionRegister.get());
-
- // The finally block.
- generator.emitLabel(finallyStart.get());
- generator.emitNode(dst, m_finallyBlock);
- generator.emitSubroutineReturn(finallyReturnAddr.get());
-
- generator.emitLabel(finallyEndLabel.get());
- }
-
- return dst;
+ size_t size = m_statements.size();
+ return size == 1 ? m_statements[0] : 0;
}
// -----------------------------ScopeNodeData ---------------------------
-ScopeNodeData::ScopeNodeData(ParserArena& arena, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, int numConstants)
+ScopeNodeData::ScopeNodeData(ParserArena& arena, SourceElements* statements, VarStack* varStack, FunctionStack* funcStack, int numConstants)
: m_numConstants(numConstants)
+ , m_statements(statements)
{
m_arena.swap(arena);
if (varStack)
m_varStack.swap(*varStack);
if (funcStack)
m_functionStack.swap(*funcStack);
- if (children)
- children->releaseContentsIntoVector(m_children);
-}
-
-void ScopeNodeData::mark()
-{
- FunctionStack::iterator end = m_functionStack.end();
- for (FunctionStack::iterator ptr = m_functionStack.begin(); ptr != end; ++ptr) {
- FunctionBodyNode* body = (*ptr)->body();
- if (!body->isGenerated())
- continue;
- body->generatedBytecode().mark();
- }
}
// ------------------------------ ScopeNode -----------------------------
, ParserArenaRefCounted(globalData)
, m_features(NoFeatures)
{
-#if ENABLE(CODEBLOCK_SAMPLING)
- if (SamplingTool* sampler = globalData->interpreter->sampler())
- sampler->notifyOfScope(this);
-#endif
}
ScopeNode::ScopeNode(JSGlobalData* globalData, const SourceCode& source, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, CodeFeatures features, int numConstants)
, m_features(features)
, m_source(source)
{
-#if ENABLE(CODEBLOCK_SAMPLING)
- if (SamplingTool* sampler = globalData->interpreter->sampler())
- sampler->notifyOfScope(this);
-#endif
+}
+
+StatementNode* ScopeNode::singleStatement() const
+{
+ return m_data->m_statements ? m_data->m_statements->singleStatement() : 0;
}
// ------------------------------ ProgramNode -----------------------------
return node.release();
}
-RegisterID* ProgramNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- generator.emitDebugHook(WillExecuteProgram, firstLine(), lastLine());
-
- RefPtr<RegisterID> dstRegister = generator.newTemporary();
- generator.emitLoad(dstRegister.get(), jsUndefined());
- statementListEmitCode(children(), generator, dstRegister.get());
-
- generator.emitDebugHook(DidExecuteProgram, firstLine(), lastLine());
- generator.emitEnd(dstRegister.get());
- return 0;
-}
-
-void ProgramNode::generateBytecode(ScopeChainNode* scopeChainNode)
-{
- ScopeChain scopeChain(scopeChainNode);
- JSGlobalObject* globalObject = scopeChain.globalObject();
-
- m_code.set(new ProgramCodeBlock(this, GlobalCode, globalObject, source().provider()));
-
- OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(this, globalObject->debugger(), scopeChain, &globalObject->symbolTable(), m_code.get()));
- generator->generate();
-
- destroyData();
-}
-
-#if ENABLE(JIT)
-void ProgramNode::generateJITCode(ScopeChainNode* scopeChainNode)
-{
- bytecode(scopeChainNode);
- ASSERT(m_code);
- ASSERT(!m_jitCode);
- JIT::compile(scopeChainNode->globalData, m_code.get());
- ASSERT(m_jitCode);
-}
-#endif
-
// ------------------------------ EvalNode -----------------------------
inline EvalNode::EvalNode(JSGlobalData* globalData, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, const SourceCode& source, CodeFeatures features, int numConstants)
return node.release();
}
-RegisterID* EvalNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- generator.emitDebugHook(WillExecuteProgram, firstLine(), lastLine());
-
- RefPtr<RegisterID> dstRegister = generator.newTemporary();
- generator.emitLoad(dstRegister.get(), jsUndefined());
- statementListEmitCode(children(), generator, dstRegister.get());
-
- generator.emitDebugHook(DidExecuteProgram, firstLine(), lastLine());
- generator.emitEnd(dstRegister.get());
- return 0;
-}
-
-void EvalNode::generateBytecode(ScopeChainNode* scopeChainNode)
-{
- ScopeChain scopeChain(scopeChainNode);
- JSGlobalObject* globalObject = scopeChain.globalObject();
-
- m_code.set(new EvalCodeBlock(this, globalObject, source().provider(), scopeChain.localDepth()));
-
- OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(this, globalObject->debugger(), scopeChain, &m_code->symbolTable(), m_code.get()));
- generator->generate();
-
- // Eval code needs to hang on to its declaration stacks to keep declaration info alive until Interpreter::execute time,
- // so the entire ScopeNodeData cannot be destoyed.
- children().clear();
-}
-
-EvalCodeBlock& EvalNode::bytecodeForExceptionInfoReparse(ScopeChainNode* scopeChainNode, CodeBlock* codeBlockBeingRegeneratedFrom)
-{
- ASSERT(!m_code);
-
- ScopeChain scopeChain(scopeChainNode);
- JSGlobalObject* globalObject = scopeChain.globalObject();
-
- m_code.set(new EvalCodeBlock(this, globalObject, source().provider(), scopeChain.localDepth()));
-
- OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(this, globalObject->debugger(), scopeChain, &m_code->symbolTable(), m_code.get()));
- generator->setRegeneratingForExceptionInfo(codeBlockBeingRegeneratedFrom);
- generator->generate();
-
- return *m_code;
-}
-
-void EvalNode::mark()
-{
- // We don't need to mark our own CodeBlock as the JSGlobalObject takes care of that
- data()->mark();
-}
+// ------------------------------ FunctionBodyNode -----------------------------
-#if ENABLE(JIT)
-void EvalNode::generateJITCode(ScopeChainNode* scopeChainNode)
+FunctionParameters::FunctionParameters(ParameterNode* firstParameter)
{
- bytecode(scopeChainNode);
- ASSERT(m_code);
- ASSERT(!m_jitCode);
- JIT::compile(scopeChainNode->globalData, m_code.get());
- ASSERT(m_jitCode);
+ for (ParameterNode* parameter = firstParameter; parameter; parameter = parameter->nextParam())
+ append(parameter->ident());
}
-#endif
-
-// ------------------------------ FunctionBodyNode -----------------------------
inline FunctionBodyNode::FunctionBodyNode(JSGlobalData* globalData)
: ScopeNode(globalData)
- , m_parameters(0)
- , m_parameterCount(0)
{
}
inline FunctionBodyNode::FunctionBodyNode(JSGlobalData* globalData, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, const SourceCode& sourceCode, CodeFeatures features, int numConstants)
: ScopeNode(globalData, sourceCode, children, varStack, funcStack, features, numConstants)
- , m_parameters(0)
- , m_parameterCount(0)
-{
-}
-
-FunctionBodyNode::~FunctionBodyNode()
{
- for (size_t i = 0; i < m_parameterCount; ++i)
- m_parameters[i].~Identifier();
- fastFree(m_parameters);
}
-void FunctionBodyNode::finishParsing(const SourceCode& source, ParameterNode* firstParameter)
+void FunctionBodyNode::finishParsing(const SourceCode& source, ParameterNode* firstParameter, const Identifier& ident)
{
- Vector<Identifier> parameters;
- for (ParameterNode* parameter = firstParameter; parameter; parameter = parameter->nextParam())
- parameters.append(parameter->ident());
- size_t count = parameters.size();
-
setSource(source);
- finishParsing(parameters.releaseBuffer(), count);
+ finishParsing(FunctionParameters::create(firstParameter), ident);
}
-void FunctionBodyNode::finishParsing(Identifier* parameters, size_t parameterCount)
+void FunctionBodyNode::finishParsing(PassRefPtr<FunctionParameters> parameters, const Identifier& ident)
{
ASSERT(!source().isNull());
m_parameters = parameters;
- m_parameterCount = parameterCount;
-}
-
-void FunctionBodyNode::mark()
-{
- if (m_code)
- m_code->mark();
-}
-
-#if ENABLE(JIT)
-PassRefPtr<FunctionBodyNode> FunctionBodyNode::createNativeThunk(JSGlobalData* globalData)
-{
- RefPtr<FunctionBodyNode> body = new FunctionBodyNode(globalData);
- globalData->parser->arena().reset();
- body->m_code.set(new CodeBlock(body.get()));
- body->m_jitCode = JITCode(JITCode::HostFunction(globalData->jitStubs.ctiNativeCallThunk()));
- return body.release();
-}
-#endif
-
-bool FunctionBodyNode::isHostFunction() const
-{
- return m_code && m_code->codeType() == NativeCode;
+ m_ident = ident;
}
FunctionBodyNode* FunctionBodyNode::create(JSGlobalData* globalData)
return node.release();
}
-void FunctionBodyNode::generateBytecode(ScopeChainNode* scopeChainNode)
-{
- // This branch is only necessary since you can still create a non-stub FunctionBodyNode by
- // calling Parser::parse<FunctionBodyNode>().
- if (!data())
- scopeChainNode->globalData->parser->reparseInPlace(scopeChainNode->globalData, this);
- ASSERT(data());
-
- ScopeChain scopeChain(scopeChainNode);
- JSGlobalObject* globalObject = scopeChain.globalObject();
-
- m_code.set(new CodeBlock(this, FunctionCode, source().provider(), source().startOffset()));
-
- OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(this, globalObject->debugger(), scopeChain, &m_code->symbolTable(), m_code.get()));
- generator->generate();
-
- destroyData();
-}
-
-#if ENABLE(JIT)
-void FunctionBodyNode::generateJITCode(ScopeChainNode* scopeChainNode)
-{
- bytecode(scopeChainNode);
- ASSERT(m_code);
- ASSERT(!m_jitCode);
- JIT::compile(scopeChainNode->globalData, m_code.get());
- ASSERT(m_jitCode);
-}
-#endif
-
-CodeBlock& FunctionBodyNode::bytecodeForExceptionInfoReparse(ScopeChainNode* scopeChainNode, CodeBlock* codeBlockBeingRegeneratedFrom)
-{
- ASSERT(!m_code);
-
- ScopeChain scopeChain(scopeChainNode);
- JSGlobalObject* globalObject = scopeChain.globalObject();
-
- m_code.set(new CodeBlock(this, FunctionCode, source().provider(), source().startOffset()));
-
- OwnPtr<BytecodeGenerator> generator(new BytecodeGenerator(this, globalObject->debugger(), scopeChain, &m_code->symbolTable(), m_code.get()));
- generator->setRegeneratingForExceptionInfo(codeBlockBeingRegeneratedFrom);
- generator->generate();
-
- return *m_code;
-}
-
-RegisterID* FunctionBodyNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- generator.emitDebugHook(DidEnterCallFrame, firstLine(), lastLine());
- statementListEmitCode(children(), generator, generator.ignoredResult());
- if (children().size() && children().last()->isBlock()) {
- BlockNode* blockNode = static_cast<BlockNode*>(children().last());
- if (blockNode->children().size() && blockNode->children().last()->isReturnNode())
- return 0;
- }
-
- RegisterID* r0 = generator.emitLoad(0, jsUndefined());
- generator.emitDebugHook(WillLeaveCallFrame, firstLine(), lastLine());
- generator.emitReturn(r0);
- return 0;
-}
-
-UString FunctionBodyNode::paramString() const
-{
- UString s("");
- for (size_t pos = 0; pos < m_parameterCount; ++pos) {
- if (!s.isEmpty())
- s += ", ";
- s += parameters()[pos].ustring();
- }
-
- return s;
-}
-
-Identifier* FunctionBodyNode::copyParameters()
-{
- Identifier* parameters = static_cast<Identifier*>(fastMalloc(m_parameterCount * sizeof(Identifier)));
- VectorCopier<false, Identifier>::uninitializedCopy(m_parameters, m_parameters + m_parameterCount, parameters);
- return parameters;
-}
-
-// ------------------------------ FuncDeclNode ---------------------------------
-
-JSFunction* FuncDeclNode::makeFunction(ExecState* exec, ScopeChainNode* scopeChain)
-{
- return new (exec) JSFunction(exec, m_ident, m_body.get(), scopeChain);
-}
-
-RegisterID* FuncDeclNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- dst = 0;
- return dst;
-}
-
-// ------------------------------ FuncExprNode ---------------------------------
-
-RegisterID* FuncExprNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- return generator.emitNewFunctionExpression(generator.finalDestination(dst), this);
-}
-
-JSFunction* FuncExprNode::makeFunction(ExecState* exec, ScopeChainNode* scopeChain)
-{
- JSFunction* func = new (exec) JSFunction(exec, m_ident, m_body.get(), scopeChain);
-
- /*
- The Identifier in a FunctionExpression can be referenced from inside
- the FunctionExpression's FunctionBody to allow the function to call
- itself recursively. However, unlike in a FunctionDeclaration, the
- Identifier in a FunctionExpression cannot be referenced from and
- does not affect the scope enclosing the FunctionExpression.
- */
-
- if (!m_ident.isNull()) {
- JSStaticScopeObject* functionScopeObject = new (exec) JSStaticScopeObject(exec, m_ident, func, ReadOnly | DontDelete);
- func->scope().push(functionScopeObject);
- }
-
- return func;
-}
-
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff