- if (generator.registerFor(m_ident))
- return generator.emitUnexpectedLoad(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 -----------------------------------
-
-DeleteBracketNode::~DeleteBracketNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void DeleteBracketNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_base);
- releaser.release(m_subscript);
-}
-
-RegisterID* DeleteBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> r0 = generator.emitNode(m_base.get());
- RegisterID* r1 = generator.emitNode(m_subscript.get());
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitDeleteByVal(generator.finalDestination(dst), r0.get(), r1);
-}
-
-// ------------------------------ DeleteDotNode -----------------------------------
-
-DeleteDotNode::~DeleteDotNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void DeleteDotNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_base);
-}
-
-RegisterID* DeleteDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RegisterID* r0 = generator.emitNode(m_base.get());
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitDeleteById(generator.finalDestination(dst), r0, m_ident);
-}
-
-// ------------------------------ DeleteValueNode -----------------------------------
-
-DeleteValueNode::~DeleteValueNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void DeleteValueNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
-}
-
-RegisterID* DeleteValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitNode(generator.ignoredResult(), m_expr.get());
-
- // delete on a non-location expression ignores the value and returns true
- return generator.emitUnexpectedLoad(generator.finalDestination(dst), true);
-}
-
-// ------------------------------ VoidNode -------------------------------------
-
-VoidNode::~VoidNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void VoidNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
-}
-
-RegisterID* VoidNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult()) {
- generator.emitNode(generator.ignoredResult(), m_expr.get());
- return 0;
- }
- RefPtr<RegisterID> r0 = generator.emitNode(m_expr.get());
- 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 -----------------------------------
-
-TypeOfValueNode::~TypeOfValueNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void TypeOfValueNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
-}
-
-RegisterID* TypeOfValueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult()) {
- generator.emitNode(generator.ignoredResult(), m_expr.get());
- return 0;
- }
- RefPtr<RegisterID> src = generator.emitNode(m_expr.get());
- 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.emitUnexpectedLoad(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 ----------------------------------
-
-PrefixBracketNode::~PrefixBracketNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void PrefixBracketNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_base);
- releaser.release(m_subscript);
-}
-
-RegisterID* PrefixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNode(m_base.get());
- RefPtr<RegisterID> property = generator.emitNode(m_subscript.get());
- 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 ----------------------------------
-
-PrefixDotNode::~PrefixDotNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void PrefixDotNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_base);
-}
-
-RegisterID* PrefixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNode(m_base.get());
- 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 -----------------------------------
-
-PrefixErrorNode::~PrefixErrorNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void PrefixErrorNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
-}
-
-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 -----------------------------------
-
-UnaryOpNode::~UnaryOpNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void UnaryOpNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
-}
-
-RegisterID* UnaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RegisterID* src = generator.emitNode(m_expr.get());
- return generator.emitUnaryOp(opcodeID(), generator.finalDestination(dst), src);
-}
-
-// ------------------------------ Binary Operation Nodes -----------------------------------
-
-BinaryOpNode::~BinaryOpNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void BinaryOpNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr1);
- releaser.release(m_expr2);
-}
-
-RegisterID* BinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- OpcodeID opcodeID = this->opcodeID();
- 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.get() : m_expr1.get());
- return generator.emitUnaryOp(op_neq_null, generator.finalDestination(dst, src.get()), src.get());
- }
- }
-
- RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1.get(), m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2.get());
- 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.get() : m_expr1.get());
- return generator.emitUnaryOp(op_eq_null, generator.finalDestination(dst, src.get()), src.get());
- }
-
- RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(m_expr1.get(), m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2.get());
- 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.get(), m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2.get());
- 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.get(), m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2.get());
- 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.get(), m_rightHasAssignments, m_expr2->isPure(generator));
- RegisterID* src2 = generator.emitNode(m_expr2.get());
- 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.get(), m_rightHasAssignments, m_expr2->isPure(generator));
- RefPtr<RegisterID> src2 = generator.emitNode(m_expr2.get());
-
- 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 ----------------------------
-
-LogicalOpNode::~LogicalOpNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void LogicalOpNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr1);
- releaser.release(m_expr2);
-}
-
-RegisterID* LogicalOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> temp = generator.tempDestination(dst);
- RefPtr<Label> target = generator.newLabel();
-
- generator.emitNode(temp.get(), m_expr1.get());
- if (m_operator == OpLogicalAnd)
- generator.emitJumpIfFalse(temp.get(), target.get());
- else
- generator.emitJumpIfTrue(temp.get(), target.get());
- generator.emitNode(temp.get(), m_expr2.get());
- generator.emitLabel(target.get());
-
- return generator.moveToDestinationIfNeeded(dst, temp.get());
-}
-
-// ------------------------------ ConditionalNode ------------------------------
-
-ConditionalNode::~ConditionalNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ConditionalNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_logical);
- releaser.release(m_expr1);
- releaser.release(m_expr2);
-}
-
-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.get());
- generator.emitJumpIfFalse(cond, beforeElse.get());
-
- generator.emitNode(newDst.get(), m_expr1.get());
- generator.emitJump(afterElse.get());
-
- generator.emitLabel(beforeElse.get());
- generator.emitNode(newDst.get(), m_expr2.get());
-
- generator.emitLabel(afterElse.get());
-
- return newDst.get();
-}
-
-// ------------------------------ ReadModifyResolveNode -----------------------------------
-
-ReadModifyResolveNode::~ReadModifyResolveNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ReadModifyResolveNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_right);
-}
-
-// FIXME: should this be moved to be a method on BytecodeGenerator?
-static ALWAYS_INLINE RegisterID* emitReadModifyAssignment(BytecodeGenerator& generator, RegisterID* dst, RegisterID* src1, RegisterID* src2, Operator oper, OperandTypes types)
-{
- OpcodeID opcodeID;
- switch (oper) {
- case OpMultEq:
- opcodeID = op_mul;
- break;
- case OpDivEq:
- opcodeID = op_div;
- break;
- case OpPlusEq:
- 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;
- }
-
- 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)) {
- RegisterID* src2 = generator.emitNode(m_right.get());
- return emitReadModifyAssignment(generator, generator.finalDestination(dst), local, src2, 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);
- RegisterID* src2 = generator.emitNode(m_right.get());
- emitReadModifyAssignment(generator, result.get(), result.get(), src2, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- generator.emitMove(local, result.get());
- return generator.moveToDestinationIfNeeded(dst, result.get());
- }
-
- RegisterID* src2 = generator.emitNode(m_right.get());
- RegisterID* result = emitReadModifyAssignment(generator, local, local, src2, 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* src2 = generator.emitNode(m_right.get());
- RegisterID* result = emitReadModifyAssignment(generator, generator.finalDestination(dst, src1.get()), src1.get(), src2, 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* src2 = generator.emitNode(m_right.get());
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- RegisterID* result = emitReadModifyAssignment(generator, generator.finalDestination(dst, src1.get()), src1.get(), src2, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- return generator.emitPutById(base.get(), m_ident, result);
-}
-
-// ------------------------------ AssignResolveNode -----------------------------------
-
-AssignResolveNode::~AssignResolveNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void AssignResolveNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_right);
-}
-
-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.get());
-
- RegisterID* result = generator.emitNode(local, m_right.get());
- 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.get());
- 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.get());
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitPutById(base.get(), m_ident, value);
-}
-
-// ------------------------------ AssignDotNode -----------------------------------
-
-AssignDotNode::~AssignDotNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void AssignDotNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_base);
- releaser.release(m_right);
-}
-
-RegisterID* AssignDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base.get(), m_rightHasAssignments, m_right->isPure(generator));
- RefPtr<RegisterID> value = generator.destinationForAssignResult(dst);
- RegisterID* result = generator.emitNode(value.get(), m_right.get());
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutById(base.get(), m_ident, result);
- return generator.moveToDestinationIfNeeded(dst, result);
-}
-
-// ------------------------------ ReadModifyDotNode -----------------------------------
-
-ReadModifyDotNode::~ReadModifyDotNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ReadModifyDotNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_base);
- releaser.release(m_right);
-}
-
-RegisterID* ReadModifyDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base.get(), 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* change = generator.emitNode(m_right.get());
- RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), change, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitPutById(base.get(), m_ident, updatedValue);
-}
-
-// ------------------------------ AssignErrorNode -----------------------------------
-
-AssignErrorNode::~AssignErrorNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void AssignErrorNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_left);
- releaser.release(m_right);
-}
-
-RegisterID* AssignErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- return emitThrowError(generator, ReferenceError, "Left side of assignment is not a reference.");
-}
-
-// ------------------------------ AssignBracketNode -----------------------------------
-
-AssignBracketNode::~AssignBracketNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void AssignBracketNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_base);
- releaser.release(m_subscript);
- releaser.release(m_right);
-}
-
-RegisterID* AssignBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base.get(), m_subscriptHasAssignments || m_rightHasAssignments, m_subscript->isPure(generator) && m_right->isPure(generator));
- RefPtr<RegisterID> property = generator.emitNodeForLeftHandSide(m_subscript.get(), m_rightHasAssignments, m_right->isPure(generator));
- RefPtr<RegisterID> value = generator.destinationForAssignResult(dst);
- RegisterID* result = generator.emitNode(value.get(), m_right.get());
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutByVal(base.get(), property.get(), result);
- return generator.moveToDestinationIfNeeded(dst, result);
-}
-
-// ------------------------------ ReadModifyBracketNode -----------------------------------
-
-ReadModifyBracketNode::~ReadModifyBracketNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ReadModifyBracketNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_base);
- releaser.release(m_subscript);
- releaser.release(m_right);
-}
-
-RegisterID* ReadModifyBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base.get(), m_subscriptHasAssignments || m_rightHasAssignments, m_subscript->isPure(generator) && m_right->isPure(generator));
- RefPtr<RegisterID> property = generator.emitNodeForLeftHandSide(m_subscript.get(), 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* change = generator.emitNode(m_right.get());
- RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), change, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutByVal(base.get(), property.get(), updatedValue);
-
- return updatedValue;
-}
-
-// ------------------------------ CommaNode ------------------------------------
-
-CommaNode::~CommaNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void CommaNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr1);
- releaser.release(m_expr2);
-}
-
-RegisterID* CommaNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- generator.emitNode(generator.ignoredResult(), m_expr1.get());
- return generator.emitNode(dst, m_expr2.get());
-}
-
-// ------------------------------ ConstDeclNode ------------------------------------
-
-ConstDeclNode::~ConstDeclNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ConstDeclNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_next);
- releaser.release(m_init);
-}
-
-ConstDeclNode::ConstDeclNode(JSGlobalData* globalData, const Identifier& ident, ExpressionNode* init)
- : ExpressionNode(globalData)
- , m_ident(ident)
- , m_init(init)
-{
-}
-
-RegisterID* ConstDeclNode::emitCodeSingle(BytecodeGenerator& generator)
-{
- if (RegisterID* local = generator.constRegisterFor(m_ident)) {
- if (!m_init)
- return local;
-
- return generator.emitNode(local, m_init.get());
- }
-
- // 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.get()) : 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.get())
- result = n->emitCodeSingle(generator);
-
- return result;
-}
-
-// ------------------------------ ConstStatementNode -----------------------------
-
-ConstStatementNode::~ConstStatementNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ConstStatementNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_next);
-}
-
-RegisterID* ConstStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- return generator.emitNode(m_next.get());
-}
-
-// ------------------------------ Helper functions for handling Vectors of StatementNode -------------------------------
-
-static inline RegisterID* statementListEmitCode(const StatementVector& statements, BytecodeGenerator& generator, RegisterID* dst)
-{
- StatementVector::const_iterator end = statements.end();
- for (StatementVector::const_iterator it = statements.begin(); it != end; ++it) {
- StatementNode* n = it->get();
- if (!n->isLoop())
- generator.emitDebugHook(WillExecuteStatement, n->firstLine(), n->lastLine());
- generator.emitNode(dst, n);
- }
- return 0;
-}
-
-// ------------------------------ BlockNode ------------------------------------
-
-BlockNode::~BlockNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void BlockNode::releaseNodes(NodeReleaser& releaser)
-{
- size_t size = m_children.size();
- for (size_t i = 0; i < size; ++i)
- releaser.release(m_children[i]);
-}
-
-BlockNode::BlockNode(JSGlobalData* globalData, SourceElements* children)
- : StatementNode(globalData)
-{
- if (children)
- children->releaseContentsIntoVector(m_children);
-}
-
-RegisterID* BlockNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- return statementListEmitCode(m_children, generator, dst);
-}
-
-// ------------------------------ EmptyStatementNode ---------------------------
-
-RegisterID* EmptyStatementNode::emitBytecode(BytecodeGenerator&, RegisterID* dst)
-{
- 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);
- return generator.emitNode(dst, m_expr.get());
-}
-
-// ------------------------------ VarStatementNode ----------------------------
-
-VarStatementNode::~VarStatementNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void VarStatementNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
-}
-
-RegisterID* VarStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
-{
- ASSERT(m_expr);
- return generator.emitNode(m_expr.get());
-}
-
-// ------------------------------ IfNode ---------------------------------------
-
-IfNode::~IfNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void IfNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_condition);
- releaser.release(m_ifBlock);
-}
-
-RegisterID* IfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<Label> afterThen = generator.newLabel();
-
- RegisterID* cond = generator.emitNode(m_condition.get());
- generator.emitJumpIfFalse(cond, afterThen.get());
-
- if (!m_ifBlock->isBlock())
- generator.emitDebugHook(WillExecuteStatement, m_ifBlock->firstLine(), m_ifBlock->lastLine());
-
- generator.emitNode(dst, m_ifBlock.get());
- generator.emitLabel(afterThen.get());
-
- // FIXME: This should return the last statement executed so that it can be returned as a Completion.
- return 0;
-}
-
-// ------------------------------ IfElseNode ---------------------------------------
-
-IfElseNode::~IfElseNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void IfElseNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_elseBlock);
- IfNode::releaseNodes(releaser);
-}
-
-RegisterID* IfElseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<Label> beforeElse = generator.newLabel();
- RefPtr<Label> afterElse = generator.newLabel();
-
- RegisterID* cond = generator.emitNode(m_condition.get());
- generator.emitJumpIfFalse(cond, beforeElse.get());
-
- if (!m_ifBlock->isBlock())
- generator.emitDebugHook(WillExecuteStatement, m_ifBlock->firstLine(), m_ifBlock->lastLine());
-
- generator.emitNode(dst, m_ifBlock.get());
- generator.emitJump(afterElse.get());
-
- generator.emitLabel(beforeElse.get());
-
- if (!m_elseBlock->isBlock())
- generator.emitDebugHook(WillExecuteStatement, m_elseBlock->firstLine(), m_elseBlock->lastLine());
-
- generator.emitNode(dst, m_elseBlock.get());
-
- generator.emitLabel(afterElse.get());
-
- // FIXME: This should return the last statement executed so that it can be returned as a Completion.
- return 0;
-}
-
-// ------------------------------ DoWhileNode ----------------------------------
-
-DoWhileNode::~DoWhileNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void DoWhileNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_statement);
- releaser.release(m_expr);
-}
-
-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());
-
- if (!m_statement->isBlock())
- generator.emitDebugHook(WillExecuteStatement, m_statement->firstLine(), m_statement->lastLine());
-
- RefPtr<RegisterID> result = generator.emitNode(dst, m_statement.get());
-
- generator.emitLabel(scope->continueTarget());
- generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
- RegisterID* cond = generator.emitNode(m_expr.get());
- generator.emitJumpIfTrue(cond, topOfLoop.get());
-
- generator.emitLabel(scope->breakTarget());
- return result.get();
-}
-
-// ------------------------------ WhileNode ------------------------------------
-
-WhileNode::~WhileNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void WhileNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
- releaser.release(m_statement);
-}
-
-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());
-
- if (!m_statement->isBlock())
- generator.emitDebugHook(WillExecuteStatement, m_statement->firstLine(), m_statement->lastLine());
-
- generator.emitNode(dst, m_statement.get());
-
- generator.emitLabel(scope->continueTarget());
- generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
- RegisterID* cond = generator.emitNode(m_expr.get());
- 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 --------------------------------------
-
-ForNode::~ForNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ForNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr1);
- releaser.release(m_expr2);
- releaser.release(m_expr3);
- releaser.release(m_statement);
-}
-
-RegisterID* ForNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- dst = 0;
-
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
-
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- if (m_expr1)
- generator.emitNode(generator.ignoredResult(), m_expr1.get());
-
- RefPtr<Label> condition = generator.newLabel();
- generator.emitJump(condition.get());
-
- RefPtr<Label> topOfLoop = generator.newLabel();
- generator.emitLabel(topOfLoop.get());
-
- if (!m_statement->isBlock())
- generator.emitDebugHook(WillExecuteStatement, m_statement->firstLine(), m_statement->lastLine());
- RefPtr<RegisterID> result = generator.emitNode(dst, m_statement.get());
-
- generator.emitLabel(scope->continueTarget());
- if (m_expr3)
- generator.emitNode(generator.ignoredResult(), m_expr3.get());
-
- generator.emitLabel(condition.get());
- if (m_expr2) {
- RegisterID* cond = generator.emitNode(m_expr2.get());
- generator.emitJumpIfTrue(cond, topOfLoop.get());
- } else
- generator.emitJump(topOfLoop.get());
-
- generator.emitLabel(scope->breakTarget());
- return result.get();
-}
-
-// ------------------------------ ForInNode ------------------------------------
-
-ForInNode::~ForInNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ForInNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_init);
- releaser.release(m_lexpr);
- releaser.release(m_expr);
- releaser.release(m_statement);
-}
-
-ForInNode::ForInNode(JSGlobalData* globalData, ExpressionNode* l, ExpressionNode* expr, StatementNode* statement)
- : StatementNode(globalData)
- , m_init(0L)
- , m_lexpr(l)
- , m_expr(expr)
- , m_statement(statement)
- , m_identIsVarDecl(false)
-{
-}
-
-ForInNode::ForInNode(JSGlobalData* globalData, const Identifier& ident, ExpressionNode* in, ExpressionNode* expr, StatementNode* statement, int divot, int startOffset, int endOffset)
- : StatementNode(globalData)
- , m_ident(ident)
- , m_lexpr(new ResolveNode(globalData, ident, divot - startOffset))
- , m_expr(expr)
- , m_statement(statement)
- , m_identIsVarDecl(true)
-{
- if (in) {
- AssignResolveNode* node = new AssignResolveNode(globalData, ident, in, true);
- node->setExceptionSourceCode(divot, divot - startOffset, endOffset - divot);
- m_init = node;
- }
- // for( var foo = bar in baz )
-}
-
-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.get());
- RegisterID* forInBase = generator.emitNode(m_expr.get());
- 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.get())->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.get());
- 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.get());
- 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);
- }
-
- if (!m_statement->isBlock())
- generator.emitDebugHook(WillExecuteStatement, m_statement->firstLine(), m_statement->lastLine());
- generator.emitNode(dst, m_statement.get());
-
- generator.emitLabel(scope->continueTarget());
- generator.emitNextPropertyName(propertyName, iter.get(), loopStart.get());
- generator.emitLabel(scope->breakTarget());
- return dst;
-}
-
-// ------------------------------ ContinueNode ---------------------------------
-
-// ECMA 12.7
-RegisterID* ContinueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- 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)
-{
- 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 -----------------------------------
-
-ReturnNode::~ReturnNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ReturnNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_value);
-}
-
-RegisterID* ReturnNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- 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.get()) : 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 -------------------------------------
-
-WithNode::~WithNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void WithNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
- releaser.release(m_statement);
-}
-
-RegisterID* WithNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<RegisterID> scope = generator.newTemporary();
- generator.emitNode(scope.get(), m_expr.get()); // scope must be protected until popped
- generator.emitExpressionInfo(m_divot, m_expressionLength, 0);
- generator.emitPushScope(scope.get());
- RegisterID* result = generator.emitNode(dst, m_statement.get());
- generator.emitPopScope();
- return result;
-}
-
-// ------------------------------ CaseClauseNode --------------------------------
-
-CaseClauseNode::~CaseClauseNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void CaseClauseNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
-}
-
-// ------------------------------ ClauseListNode --------------------------------
-
-ClauseListNode::~ClauseListNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ClauseListNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_clause);
- releaser.release(m_next);
-}
-
-// ------------------------------ CaseBlockNode --------------------------------
-
-CaseBlockNode::~CaseBlockNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void CaseBlockNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_list1);
- releaser.release(m_defaultClause);
- releaser.release(m_list2);
-}
-
-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();
- JSValuePtr jsValue = JSValuePtr::makeInt32Fast(static_cast<int32_t>(value));
- if ((typeForTable & ~SwitchNumber) || !jsValue || (jsValue.getInt32Fast() != value)) {
- typeForTable = SwitchNeither;
- break;
- }
- int32_t intVal = static_cast<int32_t>(value);
- ASSERT(intVal == value);
- 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.get(), literalVector, typeForTable, singleCharacterSwitch, min_num, max_num);
- processClauseList(m_list2.get(), 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.get(); 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.get(); 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.get(); list; list = list->getNext()) {
- generator.emitLabel(labelVector[i++].get());
- result = statementListEmitCode(list->getClause()->children(), generator, dst);
- }
-
- if (m_defaultClause) {
- generator.emitLabel(defaultLabel.get());
- result = statementListEmitCode(m_defaultClause->children(), generator, dst);
- }
-
- for (ClauseListNode* list = m_list2.get(); list; list = list->getNext()) {
- generator.emitLabel(labelVector[i++].get());
- result = 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 -----------------------------------
-
-SwitchNode::~SwitchNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void SwitchNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
- releaser.release(m_block);
-}
-
-RegisterID* SwitchNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Switch);
-
- RefPtr<RegisterID> r0 = generator.emitNode(m_expr.get());
- RegisterID* r1 = m_block->emitBytecodeForBlock(generator, r0.get(), dst);
-
- generator.emitLabel(scope->breakTarget());
- return r1;
-}
-
-// ------------------------------ LabelNode ------------------------------------
-
-LabelNode::~LabelNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void LabelNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_statement);
-}
-
-RegisterID* LabelNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- 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.get());
-
- generator.emitLabel(scope->breakTarget());
- return r0;
-}
-
-// ------------------------------ ThrowNode ------------------------------------
-
-ThrowNode::~ThrowNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ThrowNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_expr);
-}
-
-RegisterID* ThrowNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- dst = 0;
- RefPtr<RegisterID> expr = generator.emitNode(dst, m_expr.get());
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitThrow(expr.get());
- return dst;
-}
-
-// ------------------------------ TryNode --------------------------------------
-
-TryNode::~TryNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void TryNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_tryBlock);
- releaser.release(m_catchBlock);
- releaser.release(m_finallyBlock);
-}
-
-RegisterID* TryNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- RefPtr<Label> tryStartLabel = generator.newLabel();
- RefPtr<Label> tryEndLabel = 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.get());
- generator.emitLabel(tryEndLabel.get());
-
- if (m_catchBlock) {
- RefPtr<Label> handlerEndLabel = generator.newLabel();
- generator.emitJump(handlerEndLabel.get());
- RefPtr<RegisterID> exceptionRegister = generator.emitCatch(generator.newTemporary(), tryStartLabel.get(), tryEndLabel.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.get());
- generator.emitPopScope();
- generator.emitLabel(handlerEndLabel.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();
- generator.emitJumpSubroutine(finallyReturnAddr.get(), finallyStart.get());
- // Use a label to record the subtle fact that sret will return to the
- // next instruction. sret is the only way to jump without an explicit label.
- generator.emitLabel(generator.newLabel().get());
- generator.emitJump(finallyEndLabel.get());
-
- // Finally block for exception path
- RefPtr<RegisterID> tempExceptionRegister = generator.emitCatch(generator.newTemporary(), tryStartLabel.get(), generator.emitLabel(generator.newLabel().get()).get());
- generator.emitJumpSubroutine(finallyReturnAddr.get(), finallyStart.get());
- // Use a label to record the subtle fact that sret will return to the
- // next instruction. sret is the only way to jump without an explicit label.
- generator.emitLabel(generator.newLabel().get());
- generator.emitThrow(tempExceptionRegister.get());
-
- // emit the finally block itself
- generator.emitLabel(finallyStart.get());
- generator.emitNode(dst, m_finallyBlock.get());
- generator.emitSubroutineReturn(finallyReturnAddr.get());
-
- generator.emitLabel(finallyEndLabel.get());
- }
-
- return dst;
-}
-
-// ------------------------------ ParameterNode -----------------------------
-
-ParameterNode::~ParameterNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ParameterNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_next);
-}
-
-// -----------------------------ScopeNodeData ---------------------------
-
-ScopeNodeData::ScopeNodeData(SourceElements* children, VarStack* varStack, FunctionStack* funcStack, int numConstants)
- : m_numConstants(numConstants)
-{
- if (varStack)
- m_varStack = *varStack;
- if (funcStack)
- m_functionStack = *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 -----------------------------
-
-ScopeNode::ScopeNode(JSGlobalData* globalData)
- : StatementNode(globalData)
- , m_features(NoFeatures)
-{
-#if ENABLE(OPCODE_SAMPLING)
- globalData->interpreter->sampler()->notifyOfScope(this);
-#endif
-}
-
-ScopeNode::ScopeNode(JSGlobalData* globalData, const SourceCode& source, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, CodeFeatures features, int numConstants)
- : StatementNode(globalData)
- , m_data(new ScopeNodeData(children, varStack, funcStack, numConstants))
- , m_features(features)
- , m_source(source)
-{
-#if ENABLE(OPCODE_SAMPLING)
- globalData->interpreter->sampler()->notifyOfScope(this);
-#endif
-}
-
-ScopeNode::~ScopeNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void ScopeNode::releaseNodes(NodeReleaser& releaser)
-{
- if (!m_data)
- return;
- size_t size = m_data->m_children.size();
- for (size_t i = 0; i < size; ++i)
- releaser.release(m_data->m_children[i]);
-}
-
-// ------------------------------ ProgramNode -----------------------------
-
-ProgramNode::ProgramNode(JSGlobalData* globalData, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, const SourceCode& source, CodeFeatures features, int numConstants)
- : ScopeNode(globalData, source, children, varStack, funcStack, features, numConstants)
-{
-}
-
-ProgramNode* ProgramNode::create(JSGlobalData* globalData, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, const SourceCode& source, CodeFeatures features, int numConstants)
-{
- return new ProgramNode(globalData, children, varStack, funcStack, source, features, numConstants);
-}
-
-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()));
-
- BytecodeGenerator generator(this, globalObject->debugger(), scopeChain, &globalObject->symbolTable(), m_code.get());
- generator.generate();
-
- destroyData();
-}
-
-// ------------------------------ EvalNode -----------------------------
-
-EvalNode::EvalNode(JSGlobalData* globalData, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, const SourceCode& source, CodeFeatures features, int numConstants)
- : ScopeNode(globalData, source, children, varStack, funcStack, features, numConstants)
-{
-}
-
-EvalNode* EvalNode::create(JSGlobalData* globalData, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, const SourceCode& source, CodeFeatures features, int numConstants)
-{
- return new EvalNode(globalData, children, varStack, funcStack, source, features, numConstants);
-}
-
-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()));
-
- BytecodeGenerator generator(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()));
-
- BytecodeGenerator generator(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 -----------------------------
-
-FunctionBodyNode::FunctionBodyNode(JSGlobalData* globalData)
- : ScopeNode(globalData)
- , m_parameters(0)
- , m_parameterCount(0)
- , m_refCount(0)
-{
-}
-
-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)
- , m_refCount(0)
-{
-}
-
-FunctionBodyNode::~FunctionBodyNode()
-{
- ASSERT(!m_refCount);
- for (size_t i = 0; i < m_parameterCount; ++i)
- m_parameters[i].~Identifier();
- fastFree(m_parameters);
-}
-
-void FunctionBodyNode::finishParsing(const SourceCode& source, ParameterNode* firstParameter)
-{
- 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);
-}
-
-void FunctionBodyNode::finishParsing(Identifier* parameters, size_t parameterCount)
-{
- ASSERT(!source().isNull());
- m_parameters = parameters;
- m_parameterCount = parameterCount;
-}
-
-void FunctionBodyNode::mark()
-{
- if (m_code)
- m_code->mark();
-}
-
-FunctionBodyNode* FunctionBodyNode::create(JSGlobalData* globalData)
-{
- return new FunctionBodyNode(globalData);
-}
-
-FunctionBodyNode* FunctionBodyNode::create(JSGlobalData* globalData, SourceElements* children, VarStack* varStack, FunctionStack* funcStack, const SourceCode& sourceCode, CodeFeatures features, int numConstants)
-{
- return new FunctionBodyNode(globalData, children, varStack, funcStack, sourceCode, features, numConstants);
-}
-
-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()));
-
- BytecodeGenerator generator(this, globalObject->debugger(), scopeChain, &m_code->symbolTable(), m_code.get());
- generator.generate();
-
- destroyData();
-}
-
-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()));
-
- BytecodeGenerator generator(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().get());
- 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 ---------------------------------
-
-FuncDeclNode::~FuncDeclNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void FuncDeclNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_parameter);
- releaser.release(m_body);
-}
-
-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 ---------------------------------
-
-FuncExprNode::~FuncExprNode()
-{
- NodeReleaser::releaseAllNodes(this);
-}
-
-void FuncExprNode::releaseNodes(NodeReleaser& releaser)
-{
- releaser.release(m_parameter);
- releaser.release(m_body);
-}
-
-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.
- */
projects / apple / javascriptcore.git / blobdiff