/*
* Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
-* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012, 2013 Apple Inc. All rights reserved.
* Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
* Copyright (C) 2007 Maks Orlovich
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
+ * Copyright (C) 2012 Igalia, S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
#include "Nodes.h"
#include "NodeConstructors.h"
+#include "BuiltinNames.h"
#include "BytecodeGenerator.h"
#include "CallFrame.h"
#include "Debugger.h"
#include "JIT.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
-#include "JSStaticScopeObject.h"
+#include "JSNameScope.h"
+#include "JSONObject.h"
#include "LabelScope.h"
#include "Lexer.h"
-#include "Operations.h"
+#include "JSCInlines.h"
#include "Parser.h"
#include "PropertyNameArray.h"
#include "RegExpCache.h"
#include "RegExpObject.h"
#include "SamplingTool.h"
+#include "StackAlignment.h"
#include <wtf/Assertions.h>
#include <wtf/RefCountedLeakCounter.h>
#include <wtf/Threading.h>
because the assignment node, "x =", passes r[x] as dst to the number node, "1".
*/
-// ------------------------------ ThrowableExpressionData --------------------------------
-
-static void substitute(UString& string, const UString& substring)
+void ExpressionNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, FallThroughMode fallThroughMode)
{
- unsigned position = string.find("%s");
- ASSERT(position != UString::NotFound);
- string = makeString(string.substr(0, position), substring, string.substr(position + 2));
-}
-
-RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* message)
-{
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- RegisterID* exception = generator.emitNewError(generator.newTemporary(), type, jsString(generator.globalData(), message));
- generator.emitThrow(exception);
- return exception;
+ RegisterID* result = generator.emitNode(this);
+ if (fallThroughMode == FallThroughMeansTrue)
+ generator.emitJumpIfFalse(result, falseTarget);
+ else
+ generator.emitJumpIfTrue(result, trueTarget);
}
-RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* messageTemplate, const UString& label)
-{
- UString message = messageTemplate;
- substitute(message, label);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- RegisterID* exception = generator.emitNewError(generator.newTemporary(), type, jsString(generator.globalData(), message));
- generator.emitThrow(exception);
- return exception;
-}
+// ------------------------------ ThrowableExpressionData --------------------------------
-inline RegisterID* ThrowableExpressionData::emitThrowError(BytecodeGenerator& generator, ErrorType type, const char* messageTemplate, const Identifier& label)
+RegisterID* ThrowableExpressionData::emitThrowReferenceError(BytecodeGenerator& generator, const String& message)
{
- return emitThrowError(generator, type, messageTemplate, label.ustring());
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ generator.emitThrowReferenceError(message);
+ return generator.newTemporary();
}
-// ------------------------------ NullNode -------------------------------------
+// ------------------------------ ConstantNode ----------------------------------
-RegisterID* NullNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void ConstantNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, FallThroughMode fallThroughMode)
{
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitLoad(dst, jsNull());
-}
-
-// ------------------------------ BooleanNode ----------------------------------
+ TriState value = jsValue(generator).pureToBoolean();
+ if (value == MixedTriState)
+ ExpressionNode::emitBytecodeInConditionContext(generator, trueTarget, falseTarget, fallThroughMode);
+ else if (value == TrueTriState && fallThroughMode == FallThroughMeansFalse)
+ generator.emitJump(trueTarget);
+ else if (value == FalseTriState && fallThroughMode == FallThroughMeansTrue)
+ generator.emitJump(falseTarget);
-RegisterID* BooleanNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
-{
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitLoad(dst, m_value);
+ // All other cases are unconditional fall-throughs, like "if (true)".
}
-// ------------------------------ NumberNode -----------------------------------
-
-RegisterID* NumberNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+RegisterID* ConstantNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
if (dst == generator.ignoredResult())
return 0;
- return generator.emitLoad(dst, m_value);
+ return generator.emitLoad(dst, jsValue(generator));
}
-// ------------------------------ StringNode -----------------------------------
-
-RegisterID* StringNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+JSValue StringNode::jsValue(BytecodeGenerator& generator) const
{
- if (dst == generator.ignoredResult())
- return 0;
- return generator.emitLoad(dst, m_value);
+ return generator.addStringConstant(m_value);
}
// ------------------------------ RegExpNode -----------------------------------
RegisterID* RegExpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- RefPtr<RegExp> regExp = generator.globalData()->regExpCache()->lookupOrCreate(m_pattern.ustring(), m_flags.ustring());
- if (!regExp->isValid())
- return emitThrowError(generator, SyntaxError, "Invalid regular expression: %s", regExp->errorMessage());
if (dst == generator.ignoredResult())
return 0;
- return generator.emitNewRegExp(generator.finalDestination(dst), regExp.get());
+ return generator.emitNewRegExp(generator.finalDestination(dst), RegExp::create(*generator.vm(), m_pattern.string(), regExpFlags(m_flags.string())));
}
// ------------------------------ ThisNode -------------------------------------
bool ResolveNode::isPure(BytecodeGenerator& generator) const
{
- return generator.isLocal(m_ident);
+ return generator.local(m_ident).get();
}
RegisterID* ResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- if (RegisterID* local = generator.registerFor(m_ident)) {
+ if (Local local = generator.local(m_ident)) {
if (dst == generator.ignoredResult())
return 0;
- return generator.moveToDestinationIfNeeded(dst, local);
+ return generator.moveToDestinationIfNeeded(dst, local.get());
}
- generator.emitExpressionInfo(m_startOffset + m_ident.size(), m_ident.size(), 0);
- return generator.emitResolve(generator.finalDestination(dst), m_ident);
+ JSTextPosition divot = m_start + m_ident.length();
+ generator.emitExpressionInfo(divot, m_start, divot);
+ RefPtr<RegisterID> scope = generator.emitResolveScope(generator.tempDestination(dst), m_ident);
+ return generator.emitGetFromScope(generator.finalDestination(dst), scope.get(), m_ident, ThrowIfNotFound);
}
// ------------------------------ ArrayNode ------------------------------------
unsigned length = 0;
ElementNode* firstPutElement;
for (firstPutElement = m_element; firstPutElement; firstPutElement = firstPutElement->next()) {
- if (firstPutElement->elision())
+ if (firstPutElement->elision() || firstPutElement->value()->isSpreadExpression())
break;
++length;
}
if (!firstPutElement && !m_elision)
- return generator.emitNewArray(generator.finalDestination(dst), m_element);
-
- RefPtr<RegisterID> array = generator.emitNewArray(generator.tempDestination(dst), m_element);
+ return generator.emitNewArray(generator.finalDestination(dst), m_element, length);
- for (ElementNode* n = firstPutElement; n; n = n->next()) {
+ RefPtr<RegisterID> array = generator.emitNewArray(generator.tempDestination(dst), m_element, length);
+ ElementNode* n = firstPutElement;
+ for (; n; n = n->next()) {
+ if (n->value()->isSpreadExpression())
+ goto handleSpread;
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));
+ RegisterID* value = generator.emitLoad(0, jsNumber(m_elision + length));
generator.emitPutById(array.get(), generator.propertyNames().length, value);
}
return generator.moveToDestinationIfNeeded(dst, array.get());
+
+handleSpread:
+ RefPtr<RegisterID> index = generator.emitLoad(generator.newTemporary(), jsNumber(length));
+ auto spreader = [this, array, index](BytecodeGenerator& generator, RegisterID* value)
+ {
+ generator.emitDirectPutByVal(array.get(), index.get(), value);
+ generator.emitInc(index.get());
+ };
+ for (; n; n = n->next()) {
+ if (n->elision())
+ generator.emitBinaryOp(op_add, index.get(), index.get(), generator.emitLoad(0, jsNumber(n->elision())), OperandTypes(ResultType::numberTypeIsInt32(), ResultType::numberTypeIsInt32()));
+ if (n->value()->isSpreadExpression()) {
+ SpreadExpressionNode* spread = static_cast<SpreadExpressionNode*>(n->value());
+ generator.emitEnumeration(spread, spread->expression(), spreader);
+ } else {
+ generator.emitDirectPutByVal(array.get(), index.get(), generator.emitNode(n->value()));
+ generator.emitInc(index.get());
+ }
+ }
+
+ if (m_elision) {
+ generator.emitBinaryOp(op_add, index.get(), index.get(), generator.emitLoad(0, jsNumber(m_elision)), OperandTypes(ResultType::numberTypeIsInt32(), ResultType::numberTypeIsInt32()));
+ generator.emitPutById(array.get(), generator.propertyNames().length, index.get());
+ }
+ return generator.moveToDestinationIfNeeded(dst, array.get());
}
bool ArrayNode::isSimpleArray() const
return true;
}
-ArgumentListNode* ArrayNode::toArgumentList(JSGlobalData* globalData) const
+ArgumentListNode* ArrayNode::toArgumentList(VM* vm, int lineNumber, int startPosition) const
{
ASSERT(!m_elision && !m_optional);
ElementNode* ptr = m_element;
if (!ptr)
return 0;
- ArgumentListNode* head = new (globalData) ArgumentListNode(globalData, ptr->value());
+ JSTokenLocation location;
+ location.line = lineNumber;
+ location.startOffset = startPosition;
+ ArgumentListNode* head = new (vm) ArgumentListNode(location, ptr->value());
ArgumentListNode* tail = head;
ptr = ptr->next();
for (; ptr; ptr = ptr->next()) {
ASSERT(!ptr->elision());
- tail = new (globalData) ArgumentListNode(globalData, tail, ptr->value());
+ tail = new (vm) ArgumentListNode(location, tail, ptr->value());
}
return head;
}
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.emitDirectPutById(newObj.get(), p->m_node->name(), value);
- break;
- }
- case PropertyNode::Getter: {
- generator.emitPutGetter(newObj.get(), p->m_node->name(), value);
- break;
+ // Fast case: this loop just handles regular value properties.
+ PropertyListNode* p = this;
+ for (; p && p->m_node->m_type == PropertyNode::Constant; p = p->m_next) {
+ if (p->m_node->m_name) {
+ generator.emitDirectPutById(newObj.get(), *p->m_node->name(), generator.emitNode(p->m_node->m_assign));
+ continue;
+ }
+ RefPtr<RegisterID> propertyName = generator.emitNode(p->m_node->m_expression);
+ generator.emitDirectPutByVal(newObj.get(), propertyName.get(), generator.emitNode(p->m_node->m_assign));
+ }
+
+ // Were there any get/set properties?
+ if (p) {
+ typedef std::pair<PropertyNode*, PropertyNode*> GetterSetterPair;
+ typedef HashMap<StringImpl*, GetterSetterPair> GetterSetterMap;
+ GetterSetterMap map;
+
+ // Build a map, pairing get/set values together.
+ for (PropertyListNode* q = p; q; q = q->m_next) {
+ PropertyNode* node = q->m_node;
+ if (node->m_type == PropertyNode::Constant)
+ continue;
+
+ GetterSetterPair pair(node, static_cast<PropertyNode*>(0));
+ GetterSetterMap::AddResult result = map.add(node->name()->impl(), pair);
+ if (!result.isNewEntry)
+ result.iterator->value.second = node;
+ }
+
+ // Iterate over the remaining properties in the list.
+ for (; p; p = p->m_next) {
+ PropertyNode* node = p->m_node;
+
+ // Handle regular values.
+ if (node->m_type == PropertyNode::Constant) {
+ if (node->name()) {
+ generator.emitDirectPutById(newObj.get(), *node->name(), generator.emitNode(node->m_assign));
+ continue;
+ }
+ RefPtr<RegisterID> propertyName = generator.emitNode(p->m_node->m_expression);
+ generator.emitDirectPutByVal(newObj.get(), propertyName.get(), generator.emitNode(p->m_node->m_assign));
+ continue;
}
- case PropertyNode::Setter: {
- generator.emitPutSetter(newObj.get(), p->m_node->name(), value);
- break;
+
+ RegisterID* value = generator.emitNode(node->m_assign);
+
+ // This is a get/set property, find its entry in the map.
+ ASSERT(node->m_type == PropertyNode::Getter || node->m_type == PropertyNode::Setter);
+ GetterSetterMap::iterator it = map.find(node->name()->impl());
+ ASSERT(it != map.end());
+ GetterSetterPair& pair = it->value;
+
+ // Was this already generated as a part of its partner?
+ if (pair.second == node)
+ continue;
+
+ // Generate the paired node now.
+ RefPtr<RegisterID> getterReg;
+ RefPtr<RegisterID> setterReg;
+
+ if (node->m_type == PropertyNode::Getter) {
+ getterReg = value;
+ if (pair.second) {
+ ASSERT(pair.second->m_type == PropertyNode::Setter);
+ setterReg = generator.emitNode(pair.second->m_assign);
+ } else {
+ setterReg = generator.newTemporary();
+ generator.emitLoad(setterReg.get(), jsUndefined());
+ }
+ } else {
+ ASSERT(node->m_type == PropertyNode::Setter);
+ setterReg = value;
+ if (pair.second) {
+ ASSERT(pair.second->m_type == PropertyNode::Getter);
+ getterReg = generator.emitNode(pair.second->m_assign);
+ } else {
+ getterReg = generator.newTemporary();
+ generator.emitLoad(getterReg.get(), jsUndefined());
+ }
}
- default:
- ASSERT_NOT_REACHED();
+
+ generator.emitPutGetterSetter(newObj.get(), *node->name(), getterReg.get(), setterReg.get());
}
}
-
+
return generator.moveToDestinationIfNeeded(dst, newObj.get());
}
RegisterID* BracketAccessorNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
+ if (m_base->isResolveNode()
+ && generator.willResolveToArguments(static_cast<ResolveNode*>(m_base)->identifier())
+ && !generator.symbolTable().slowArguments()) {
+ RefPtr<RegisterID> property = generator.emitNode(m_subscript);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ return generator.emitGetArgumentByVal(generator.finalDestination(dst), generator.uncheckedRegisterForArguments(), property.get());
+ }
+
RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments, m_subscript->isPure(generator));
RegisterID* property = generator.emitNode(m_subscript);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
return generator.emitGetByVal(generator.finalDestination(dst), base.get(), property);
}
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);
+ if (m_ident == generator.propertyNames().length) {
+ if (!m_base->isResolveNode())
+ goto nonArgumentsPath;
+ ResolveNode* resolveNode = static_cast<ResolveNode*>(m_base);
+ if (!generator.willResolveToArguments(resolveNode->identifier()))
+ goto nonArgumentsPath;
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ return generator.emitGetArgumentsLength(generator.finalDestination(dst), generator.uncheckedRegisterForArguments());
+ }
+
+nonArgumentsPath:
+ RefPtr<RegisterID> base = generator.emitNode(m_base);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ return generator.emitGetById(generator.finalDestination(dst), base.get(), m_ident);
}
// ------------------------------ ArgumentListNode -----------------------------
RegisterID* NewExprNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
+ ExpectedFunction expectedFunction;
+ if (m_expr->isResolveNode())
+ expectedFunction = generator.expectedFunctionForIdentifier(static_cast<ResolveNode*>(m_expr)->identifier());
+ else
+ expectedFunction = NoExpectedFunction;
RefPtr<RegisterID> func = generator.emitNode(m_expr);
- return generator.emitConstruct(generator.finalDestination(dst), func.get(), m_args, divot(), startOffset(), endOffset());
+ RefPtr<RegisterID> returnValue = generator.finalDestination(dst, func.get());
+ CallArguments callArguments(generator, m_args);
+ return generator.emitConstruct(returnValue.get(), func.get(), expectedFunction, callArguments, divot(), divotStart(), divotEnd());
+}
+
+CallArguments::CallArguments(BytecodeGenerator& generator, ArgumentsNode* argumentsNode, unsigned additionalArguments)
+ : m_argumentsNode(argumentsNode)
+ , m_padding(0)
+{
+ if (generator.shouldEmitProfileHooks())
+ m_profileHookRegister = generator.newTemporary();
+
+ size_t argumentCountIncludingThis = 1 + additionalArguments; // 'this' register.
+ if (argumentsNode) {
+ for (ArgumentListNode* node = argumentsNode->m_listNode; node; node = node->m_next)
+ ++argumentCountIncludingThis;
+ }
+
+ m_argv.grow(argumentCountIncludingThis);
+ for (int i = argumentCountIncludingThis - 1; i >= 0; --i) {
+ m_argv[i] = generator.newTemporary();
+ ASSERT(static_cast<size_t>(i) == m_argv.size() - 1 || m_argv[i]->index() == m_argv[i + 1]->index() - 1);
+ }
+
+ while (stackOffset() % stackAlignmentRegisters()) {
+ m_argv.insert(0, generator.newTemporary());
+ m_padding++;
+ }
}
// ------------------------------ 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());
+ if (Local local = generator.local(generator.propertyNames().eval)) {
+ RefPtr<RegisterID> func = generator.emitMove(generator.tempDestination(dst), local.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitLoad(callArguments.thisRegister(), jsUndefined());
+ return generator.emitCallEval(generator.finalDestination(dst, func.get()), func.get(), callArguments, divot(), divotStart(), divotEnd());
+ }
+
+ RefPtr<RegisterID> func = generator.newTemporary();
+ CallArguments callArguments(generator, m_args);
+ JSTextPosition newDivot = divotStart() + 4;
+ generator.emitExpressionInfo(newDivot, divotStart(), newDivot);
+ generator.emitResolveScope(callArguments.thisRegister(), generator.propertyNames().eval);
+ generator.emitGetFromScope(func.get(), callArguments.thisRegister(), generator.propertyNames().eval, ThrowIfNotFound);
+ return generator.emitCallEval(generator.finalDestination(dst, func.get()), func.get(), callArguments, divot(), divotStart(), divotEnd());
}
// ------------------------------ 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());
+ RefPtr<RegisterID> returnValue = generator.finalDestination(dst, func.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitLoad(callArguments.thisRegister(), jsUndefined());
+ return generator.emitCall(returnValue.get(), func.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
}
// ------------------------------ 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());
- }
+ ExpectedFunction expectedFunction = generator.expectedFunctionForIdentifier(m_ident);
- int index = 0;
- size_t depth = 0;
- JSObject* globalObject = 0;
- bool requiresDynamicChecks = false;
- if (generator.findScopedProperty(m_ident, index, depth, false, requiresDynamicChecks, globalObject) && index != missingSymbolMarker() && !requiresDynamicChecks) {
- 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());
+ if (Local local = generator.local(m_ident)) {
+ RefPtr<RegisterID> func = generator.emitMove(generator.tempDestination(dst), local.get());
+ RefPtr<RegisterID> returnValue = generator.finalDestination(dst, func.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitLoad(callArguments.thisRegister(), jsUndefined());
+ // This passes NoExpectedFunction because we expect that if the function is in a
+ // local variable, then it's not one of our built-in constructors.
+ return generator.emitCall(returnValue.get(), func.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
}
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());
+ RefPtr<RegisterID> returnValue = generator.finalDestination(dst, func.get());
+ CallArguments callArguments(generator, m_args);
+
+ JSTextPosition newDivot = divotStart() + m_ident.length();
+ generator.emitExpressionInfo(newDivot, divotStart(), newDivot);
+ generator.emitResolveScope(callArguments.thisRegister(), m_ident);
+ generator.emitGetFromScope(func.get(), callArguments.thisRegister(), m_ident, ThrowIfNotFound);
+ return generator.emitCall(returnValue.get(), func.get(), expectedFunction, callArguments, divot(), divotStart(), divotEnd());
}
// ------------------------------ 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());
+ RefPtr<RegisterID> property = generator.emitNode(m_subscript);
+ generator.emitExpressionInfo(subexpressionDivot(), subexpressionStart(), subexpressionEnd());
+ RefPtr<RegisterID> function = generator.emitGetByVal(generator.tempDestination(dst), base.get(), property.get());
+ RefPtr<RegisterID> returnValue = generator.finalDestination(dst, function.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitMove(callArguments.thisRegister(), base.get());
+ return generator.emitCall(returnValue.get(), function.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
}
// ------------------------------ 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());
+ RefPtr<RegisterID> returnValue = generator.finalDestination(dst, function.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitNode(callArguments.thisRegister(), m_base);
+ generator.emitExpressionInfo(subexpressionDivot(), subexpressionStart(), subexpressionEnd());
+ generator.emitGetById(function.get(), callArguments.thisRegister(), m_ident);
+ return generator.emitCall(returnValue.get(), function.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
+}
+
+static RegisterID* getArgumentByVal(BytecodeGenerator& generator, ExpressionNode* base, RegisterID* property, RegisterID* dst, JSTextPosition divot, JSTextPosition divotStart, JSTextPosition divotEnd)
+{
+ if (base->isResolveNode()
+ && generator.willResolveToArguments(static_cast<ResolveNode*>(base)->identifier())
+ && !generator.symbolTable().slowArguments()) {
+ generator.emitExpressionInfo(divot, divotStart, divotEnd);
+ return generator.emitGetArgumentByVal(generator.finalDestination(dst), generator.uncheckedRegisterForArguments(), property);
+ }
+ return nullptr;
}
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());
+ generator.emitExpressionInfo(subexpressionDivot(), subexpressionStart(), subexpressionEnd());
+ RefPtr<RegisterID> function;
+ bool emitCallCheck = !generator.isBuiltinFunction();
+ if (emitCallCheck) {
+ function = generator.emitGetById(generator.tempDestination(dst), base.get(), generator.propertyNames().builtinNames().callPublicName());
+ generator.emitJumpIfNotFunctionCall(function.get(), realCall.get());
+ }
+ RefPtr<RegisterID> returnValue = generator.finalDestination(dst);
{
- 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);
+ if (m_args->m_listNode && m_args->m_listNode->m_expr && m_args->m_listNode->m_expr->isSpreadExpression()) {
+ RefPtr<RegisterID> profileHookRegister;
+ if (generator.shouldEmitProfileHooks())
+ profileHookRegister = generator.newTemporary();
+ SpreadExpressionNode* spread = static_cast<SpreadExpressionNode*>(m_args->m_listNode->m_expr);
+ ExpressionNode* subject = spread->expression();
+ RefPtr<RegisterID> thisRegister = getArgumentByVal(generator, subject, generator.emitLoad(0, jsNumber(0)), 0, spread->divot(), spread->divotStart(), spread->divotEnd());
+ RefPtr<RegisterID> argumentsRegister;
+ if (thisRegister)
+ argumentsRegister = generator.uncheckedRegisterForArguments();
+ else {
+ argumentsRegister = generator.emitNode(subject);
+ generator.emitExpressionInfo(spread->divot(), spread->divotStart(), spread->divotEnd());
+ thisRegister = generator.emitGetByVal(generator.newTemporary(), argumentsRegister.get(), generator.emitLoad(0, jsNumber(0)));
+ }
+ generator.emitCallVarargs(returnValue.get(), base.get(), thisRegister.get(), argumentsRegister.get(), generator.newTemporary(), 1, profileHookRegister.get(), divot(), divotStart(), divotEnd());
+ } else if (m_args->m_listNode && m_args->m_listNode->m_expr) {
+ ArgumentListNode* oldList = m_args->m_listNode;
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;
+ RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitNode(callArguments.thisRegister(), oldList->m_expr);
+ generator.emitCall(returnValue.get(), realFunction.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
+ m_args->m_listNode = oldList;
+ } else {
+ RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitLoad(callArguments.thisRegister(), jsUndefined());
+ generator.emitCall(returnValue.get(), realFunction.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
+ }
}
- 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());
+ if (emitCallCheck) {
+ generator.emitJump(end.get());
+ generator.emitLabel(realCall.get());
+ {
+ CallArguments callArguments(generator, m_args);
+ generator.emitMove(callArguments.thisRegister(), base.get());
+ generator.emitCall(returnValue.get(), function.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
+ }
+ generator.emitLabel(end.get());
}
- generator.emitLabel(end.get());
- return finalDestination.get();
+ return returnValue.get();
}
-
+
static bool areTrivialApplyArguments(ArgumentsNode* args)
{
return !args->m_listNode || !args->m_listNode->m_expr || !args->m_listNode->m_next
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();
+ generator.emitExpressionInfo(subexpressionDivot(), subexpressionStart(), subexpressionEnd());
+ RefPtr<RegisterID> function;
+ RefPtr<RegisterID> returnValue = generator.finalDestination(dst, function.get());
+ bool emitCallCheck = !generator.isBuiltinFunction();
+ if (emitCallCheck) {
+ function = generator.emitGetById(generator.tempDestination(dst), base.get(), generator.propertyNames().builtinNames().applyPublicName());
+ generator.emitJumpIfNotFunctionApply(function.get(), realCall.get());
+ }
+ if (mayBeCall) {
+ if (m_args->m_listNode && m_args->m_listNode->m_expr) {
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);
+ if (m_args->m_listNode->m_expr->isSpreadExpression()) {
+ SpreadExpressionNode* spread = static_cast<SpreadExpressionNode*>(m_args->m_listNode->m_expr);
+ RefPtr<RegisterID> profileHookRegister;
+ if (generator.shouldEmitProfileHooks())
+ profileHookRegister = generator.newTemporary();
+ RefPtr<RegisterID> realFunction = generator.emitMove(generator.newTemporary(), base.get());
+ RefPtr<RegisterID> index = generator.emitLoad(generator.newTemporary(), jsNumber(0));
+ RefPtr<RegisterID> thisRegister = generator.emitLoad(generator.newTemporary(), jsUndefined());
+ RefPtr<RegisterID> argumentsRegister = generator.emitLoad(generator.newTemporary(), jsUndefined());
+
+ auto extractor = [&thisRegister, &argumentsRegister, &index](BytecodeGenerator& generator, RegisterID* value)
+ {
+ RefPtr<Label> haveThis = generator.newLabel();
+ RefPtr<Label> end = generator.newLabel();
+ RefPtr<RegisterID> compareResult = generator.newTemporary();
+ RefPtr<RegisterID> indexZeroCompareResult = generator.emitBinaryOp(op_eq, compareResult.get(), index.get(), generator.emitLoad(0, jsNumber(0)), OperandTypes(ResultType::numberTypeIsInt32(), ResultType::numberTypeIsInt32()));
+ generator.emitJumpIfFalse(indexZeroCompareResult.get(), haveThis.get());
+ generator.emitMove(thisRegister.get(), value);
+ generator.emitLoad(index.get(), jsNumber(1));
+ generator.emitJump(end.get());
+ generator.emitLabel(haveThis.get());
+ RefPtr<RegisterID> indexOneCompareResult = generator.emitBinaryOp(op_eq, compareResult.get(), index.get(), generator.emitLoad(0, jsNumber(1)), OperandTypes(ResultType::numberTypeIsInt32(), ResultType::numberTypeIsInt32()));
+ generator.emitJumpIfFalse(indexOneCompareResult.get(), end.get());
+ generator.emitMove(argumentsRegister.get(), value);
+ generator.emitLoad(index.get(), jsNumber(2));
+ generator.emitLabel(end.get());
+ };
+ generator.emitEnumeration(this, spread->expression(), extractor);
+ generator.emitCallVarargs(returnValue.get(), realFunction.get(), thisRegister.get(), argumentsRegister.get(), generator.newTemporary(), 0, profileHookRegister.get(), divot(), divotStart(), divotEnd());
+ } else if (m_args->m_listNode->m_next) {
+ ASSERT(m_args->m_listNode->m_next->m_expr->isSimpleArray());
+ ASSERT(!m_args->m_listNode->m_next->m_next);
+ m_args->m_listNode = static_cast<ArrayNode*>(m_args->m_listNode->m_next->m_expr)->toArgumentList(generator.vm(), 0, 0);
+ RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitNode(callArguments.thisRegister(), oldList->m_expr);
+ generator.emitCall(returnValue.get(), realFunction.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
+ } else {
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());
+ RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitNode(callArguments.thisRegister(), oldList->m_expr);
+ generator.emitCall(returnValue.get(), realFunction.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
+ }
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());
+ RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitLoad(callArguments.thisRegister(), jsUndefined());
+ generator.emitCall(returnValue.get(), realFunction.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
}
- generator.emitJump(end.get());
+ } else {
+ ASSERT(m_args->m_listNode && m_args->m_listNode->m_next);
+ RefPtr<RegisterID> profileHookRegister;
+ if (generator.shouldEmitProfileHooks())
+ profileHookRegister = generator.newTemporary();
+ RefPtr<RegisterID> realFunction = generator.emitMove(generator.tempDestination(dst), base.get());
+ RefPtr<RegisterID> thisRegister = generator.emitNode(m_args->m_listNode->m_expr);
+ RefPtr<RegisterID> argsRegister;
+ ArgumentListNode* args = m_args->m_listNode->m_next;
+ if (args->m_expr->isResolveNode() && generator.willResolveToArguments(static_cast<ResolveNode*>(args->m_expr)->identifier()) && !generator.symbolTable().slowArguments())
+ argsRegister = generator.uncheckedRegisterForArguments();
+ else
+ argsRegister = generator.emitNode(args->m_expr);
+
+ // Function.prototype.apply ignores extra arguments, but we still
+ // need to evaluate them for side effects.
+ while ((args = args->m_next))
+ generator.emitNode(args->m_expr);
+
+ generator.emitCallVarargs(returnValue.get(), realFunction.get(), thisRegister.get(), argsRegister.get(), generator.newTemporary(), 0, profileHookRegister.get(), divot(), divotStart(), divotEnd());
}
- 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());
+ if (emitCallCheck) {
+ generator.emitJump(end.get());
+ generator.emitLabel(realCall.get());
+ CallArguments callArguments(generator, m_args);
+ generator.emitMove(callArguments.thisRegister(), base.get());
+ generator.emitCall(returnValue.get(), function.get(), NoExpectedFunction, callArguments, divot(), divotStart(), divotEnd());
+ generator.emitLabel(end.get());
}
- generator.emitLabel(end.get());
- return finalDestination.get();
+ return returnValue.get();
}
-// ------------------------------ PostfixResolveNode ----------------------------------
+// ------------------------------ PostfixNode ----------------------------------
-static RegisterID* emitPreIncOrDec(BytecodeGenerator& generator, RegisterID* srcDst, Operator oper)
+static RegisterID* emitIncOrDec(BytecodeGenerator& generator, RegisterID* srcDst, Operator oper)
{
- return (oper == OpPlusPlus) ? generator.emitPreInc(srcDst) : generator.emitPreDec(srcDst);
+ return (oper == OpPlusPlus) ? generator.emitInc(srcDst) : generator.emitDec(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);
+ if (dst == srcDst)
+ return generator.emitToNumber(generator.finalDestination(dst), srcDst);
+ RefPtr<RegisterID> tmp = generator.emitToNumber(generator.tempDestination(dst), srcDst);
+ emitIncOrDec(generator, srcDst, oper);
+ return generator.moveToDestinationIfNeeded(dst, tmp.get());
}
-RegisterID* PostfixResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+RegisterID* PostfixNode::emitResolve(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;
- bool requiresDynamicChecks = false;
- if (generator.findScopedProperty(m_ident, index, depth, true, requiresDynamicChecks, globalObject) && index != missingSymbolMarker() && !requiresDynamicChecks) {
- 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);
+ if (dst == generator.ignoredResult())
+ return PrefixNode::emitResolve(generator, dst);
+
+ ASSERT(m_expr->isResolveNode());
+ ResolveNode* resolve = static_cast<ResolveNode*>(m_expr);
+ const Identifier& ident = resolve->identifier();
+
+ if (Local local = generator.local(ident)) {
+ RefPtr<RegisterID> localReg = local.get();
+ if (local.isReadOnly()) {
+ generator.emitReadOnlyExceptionIfNeeded();
+ localReg = generator.emitMove(generator.tempDestination(dst), localReg.get());
+ } else if (local.isCaptured()) {
+ RefPtr<RegisterID> tempDst = generator.finalDestination(dst);
+ ASSERT(dst != localReg);
+ RefPtr<RegisterID> tempDstSrc = generator.newTemporary();
+ generator.emitToNumber(tempDst.get(), localReg.get());
+ generator.emitMove(tempDstSrc.get(), localReg.get());
+ emitIncOrDec(generator, tempDstSrc.get(), m_operator);
+ generator.emitMove(localReg.get(), tempDstSrc.get());
+ return tempDst.get();
}
- generator.emitPutScopedVar(depth, index, value.get(), globalObject);
- return oldValue;
+ return emitPostIncOrDec(generator, generator.finalDestination(dst), localReg.get(), m_operator);
}
- 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;
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RefPtr<RegisterID> scope = generator.emitResolveScope(generator.newTemporary(), ident);
+ RefPtr<RegisterID> value = generator.emitGetFromScope(generator.newTemporary(), scope.get(), ident, ThrowIfNotFound);
+ RefPtr<RegisterID> oldValue = emitPostIncOrDec(generator, generator.finalDestination(dst), value.get(), m_operator);
+ generator.emitPutToScope(scope.get(), ident, value.get(), ThrowIfNotFound);
+ return oldValue.get();
}
-// ------------------------------ PostfixBracketNode ----------------------------------
-
-RegisterID* PostfixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+RegisterID* PostfixNode::emitBracket(BytecodeGenerator& generator, RegisterID* dst)
{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
- RefPtr<RegisterID> property = generator.emitNode(m_subscript);
+ if (dst == generator.ignoredResult())
+ return PrefixNode::emitBracket(generator, dst);
+
+ ASSERT(m_expr->isBracketAccessorNode());
+ BracketAccessorNode* bracketAccessor = static_cast<BracketAccessorNode*>(m_expr);
+ ExpressionNode* baseNode = bracketAccessor->base();
+ ExpressionNode* subscript = bracketAccessor->subscript();
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+ RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(baseNode, bracketAccessor->subscriptHasAssignments(), subscript->isPure(generator));
+ RefPtr<RegisterID> property = generator.emitNode(subscript);
+
+ generator.emitExpressionInfo(bracketAccessor->divot(), bracketAccessor->divotStart(), bracketAccessor->divotEnd());
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());
+ RegisterID* oldValue = emitPostIncOrDec(generator, generator.tempDestination(dst), value.get(), m_operator);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
generator.emitPutByVal(base.get(), property.get(), value.get());
- return oldValue;
+ return generator.moveToDestinationIfNeeded(dst, oldValue);
}
-// ------------------------------ PostfixDotNode ----------------------------------
-
-RegisterID* PostfixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+RegisterID* PostfixNode::emitDot(BytecodeGenerator& generator, RegisterID* dst)
{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
+ if (dst == generator.ignoredResult())
+ return PrefixNode::emitDot(generator, dst);
- 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;
-}
+ ASSERT(m_expr->isDotAccessorNode());
+ DotAccessorNode* dotAccessor = static_cast<DotAccessorNode*>(m_expr);
+ ExpressionNode* baseNode = dotAccessor->base();
+ const Identifier& ident = dotAccessor->identifier();
-// ------------------------------ PostfixErrorNode -----------------------------------
+ RefPtr<RegisterID> base = generator.emitNode(baseNode);
+
+ generator.emitExpressionInfo(dotAccessor->divot(), dotAccessor->divotStart(), dotAccessor->divotEnd());
+ RefPtr<RegisterID> value = generator.emitGetById(generator.newTemporary(), base.get(), ident);
+ RegisterID* oldValue = emitPostIncOrDec(generator, generator.tempDestination(dst), value.get(), m_operator);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ generator.emitPutById(base.get(), ident, value.get());
+ return generator.moveToDestinationIfNeeded(dst, oldValue);
+}
-RegisterID* PostfixErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+RegisterID* PostfixNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- return emitThrowError(generator, ReferenceError, m_operator == OpPlusPlus
+ if (m_expr->isResolveNode())
+ return emitResolve(generator, dst);
+
+ if (m_expr->isBracketAccessorNode())
+ return emitBracket(generator, dst);
+
+ if (m_expr->isDotAccessorNode())
+ return emitDot(generator, dst);
+
+ return emitThrowReferenceError(generator, m_operator == OpPlusPlus
? "Postfix ++ operator applied to value that is not a reference."
: "Postfix -- operator applied to value that is not a reference.");
}
RegisterID* DeleteResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- if (generator.registerFor(m_ident))
+ if (generator.local(m_ident).get())
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);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RefPtr<RegisterID> base = generator.emitResolveScope(generator.tempDestination(dst), m_ident);
+ return generator.emitDeleteById(generator.finalDestination(dst, base.get()), base.get(), m_ident);
}
// ------------------------------ DeleteBracketNode -----------------------------------
RegisterID* DeleteBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
RefPtr<RegisterID> r0 = generator.emitNode(m_base);
- RegisterID* r1 = generator.emitNode(m_subscript);
+ RefPtr<RegisterID> r1 = generator.emitNode(m_subscript);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitDeleteByVal(generator.finalDestination(dst), r0.get(), r1);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ return generator.emitDeleteByVal(generator.finalDestination(dst), r0.get(), r1.get());
}
// ------------------------------ DeleteDotNode -----------------------------------
RegisterID* DeleteDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- RegisterID* r0 = generator.emitNode(m_base);
+ RefPtr<RegisterID> r0 = generator.emitNode(m_base);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitDeleteById(generator.finalDestination(dst), r0, m_ident);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ return generator.emitDeleteById(generator.finalDestination(dst), r0.get(), m_ident);
}
// ------------------------------ DeleteValueNode -----------------------------------
RegisterID* TypeOfResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- if (RegisterID* local = generator.registerFor(m_ident)) {
+ if (Local local = generator.local(m_ident)) {
if (dst == generator.ignoredResult())
return 0;
- return generator.emitTypeOf(generator.finalDestination(dst), local);
+ return generator.emitTypeOf(generator.finalDestination(dst), local.get());
}
- RefPtr<RegisterID> scratch = generator.emitResolveBase(generator.tempDestination(dst), m_ident);
- generator.emitGetById(scratch.get(), scratch.get(), m_ident);
+ RefPtr<RegisterID> scope = generator.emitResolveScope(generator.tempDestination(dst), m_ident);
+ RefPtr<RegisterID> value = generator.emitGetFromScope(generator.newTemporary(), scope.get(), m_ident, DoNotThrowIfNotFound);
if (dst == generator.ignoredResult())
return 0;
- return generator.emitTypeOf(generator.finalDestination(dst, scratch.get()), scratch.get());
+ return generator.emitTypeOf(generator.finalDestination(dst, scope.get()), value.get());
}
// ------------------------------ TypeOfValueNode -----------------------------------
return generator.emitTypeOf(generator.finalDestination(dst), src.get());
}
-// ------------------------------ PrefixResolveNode ----------------------------------
+// ------------------------------ PrefixNode ----------------------------------
-RegisterID* PrefixResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+RegisterID* PrefixNode::emitResolve(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);
- }
+ ASSERT(m_expr->isResolveNode());
+ ResolveNode* resolve = static_cast<ResolveNode*>(m_expr);
+ const Identifier& ident = resolve->identifier();
- int index = 0;
- size_t depth = 0;
- JSObject* globalObject = 0;
- bool requiresDynamicChecks = false;
- if (generator.findScopedProperty(m_ident, index, depth, false, requiresDynamicChecks, globalObject) && index != missingSymbolMarker() && !requiresDynamicChecks) {
- 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());
+ if (Local local = generator.local(ident)) {
+ RefPtr<RegisterID> localReg = local.get();
+ if (local.isReadOnly()) {
+ generator.emitReadOnlyExceptionIfNeeded();
+ localReg = generator.emitMove(generator.tempDestination(dst), localReg.get());
+ } else if (local.isCaptured()) {
+ RefPtr<RegisterID> tempDst = generator.tempDestination(dst);
+ generator.emitMove(tempDst.get(), localReg.get());
+ emitIncOrDec(generator, tempDst.get(), m_operator);
+ generator.emitMove(localReg.get(), tempDst.get());
+ return generator.moveToDestinationIfNeeded(dst, tempDst.get());
+ }
+ emitIncOrDec(generator, localReg.get(), m_operator);
+ return generator.moveToDestinationIfNeeded(dst, localReg.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());
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RefPtr<RegisterID> scope = generator.emitResolveScope(generator.tempDestination(dst), ident);
+ RefPtr<RegisterID> value = generator.emitGetFromScope(generator.newTemporary(), scope.get(), ident, ThrowIfNotFound);
+ emitIncOrDec(generator, value.get(), m_operator);
+ generator.emitPutToScope(scope.get(), ident, value.get(), ThrowIfNotFound);
+ return generator.moveToDestinationIfNeeded(dst, value.get());
}
-// ------------------------------ PrefixBracketNode ----------------------------------
-
-RegisterID* PrefixBracketNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+RegisterID* PrefixNode::emitBracket(BytecodeGenerator& generator, RegisterID* dst)
{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
- RefPtr<RegisterID> property = generator.emitNode(m_subscript);
+ ASSERT(m_expr->isBracketAccessorNode());
+ BracketAccessorNode* bracketAccessor = static_cast<BracketAccessorNode*>(m_expr);
+ ExpressionNode* baseNode = bracketAccessor->base();
+ ExpressionNode* subscript = bracketAccessor->subscript();
+
+ RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(baseNode, bracketAccessor->subscriptHasAssignments(), subscript->isPure(generator));
+ RefPtr<RegisterID> property = generator.emitNode(subscript);
RefPtr<RegisterID> propDst = generator.tempDestination(dst);
- generator.emitExpressionInfo(divot() + m_subexpressionDivotOffset, m_subexpressionStartOffset, endOffset() - m_subexpressionDivotOffset);
+ generator.emitExpressionInfo(bracketAccessor->divot(), bracketAccessor->divotStart(), bracketAccessor->divotEnd());
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());
+ emitIncOrDec(generator, value, m_operator);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
generator.emitPutByVal(base.get(), property.get(), value);
return generator.moveToDestinationIfNeeded(dst, propDst.get());
}
-// ------------------------------ PrefixDotNode ----------------------------------
-
-RegisterID* PrefixDotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+RegisterID* PrefixNode::emitDot(BytecodeGenerator& generator, RegisterID* dst)
{
- RefPtr<RegisterID> base = generator.emitNode(m_base);
+ ASSERT(m_expr->isDotAccessorNode());
+ DotAccessorNode* dotAccessor = static_cast<DotAccessorNode*>(m_expr);
+ ExpressionNode* baseNode = dotAccessor->base();
+ const Identifier& ident = dotAccessor->identifier();
+
+ RefPtr<RegisterID> base = generator.emitNode(baseNode);
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);
+ generator.emitExpressionInfo(dotAccessor->divot(), dotAccessor->divotStart(), dotAccessor->divotEnd());
+ RegisterID* value = generator.emitGetById(propDst.get(), base.get(), ident);
+ emitIncOrDec(generator, value, m_operator);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ generator.emitPutById(base.get(), ident, value);
return generator.moveToDestinationIfNeeded(dst, propDst.get());
}
-// ------------------------------ PrefixErrorNode -----------------------------------
-
-RegisterID* PrefixErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+RegisterID* PrefixNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- return emitThrowError(generator, ReferenceError, m_operator == OpPlusPlus
+ if (m_expr->isResolveNode())
+ return emitResolve(generator, dst);
+
+ if (m_expr->isBracketAccessorNode())
+ return emitBracket(generator, dst);
+
+ if (m_expr->isDotAccessorNode())
+ return emitDot(generator, dst);
+
+ return emitThrowReferenceError(generator, m_operator == OpPlusPlus
? "Prefix ++ operator applied to value that is not a reference."
: "Prefix -- operator applied to value that is not a reference.");
}
RegisterID* UnaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- RegisterID* src = generator.emitNode(m_expr);
- return generator.emitUnaryOp(opcodeID(), generator.finalDestination(dst), src);
+ RefPtr<RegisterID> src = generator.emitNode(m_expr);
+ generator.emitExpressionInfo(position(), position(), position());
+ return generator.emitUnaryOp(opcodeID(), generator.finalDestination(dst), src.get());
}
-
+// ------------------------------ BitwiseNotNode -----------------------------------
+
+RegisterID* BitwiseNotNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+ RefPtr<RegisterID> src2 = generator.emitLoad(generator.newTemporary(), jsNumber(-1));
+ RefPtr<RegisterID> src1 = generator.emitNode(m_expr);
+ return generator.emitBinaryOp(op_bitxor, generator.finalDestination(dst, src1.get()), src1.get(), src2.get(), OperandTypes(m_expr->resultDescriptor(), ResultType::numberTypeIsInt32()));
+}
+
// ------------------------------ LogicalNotNode -----------------------------------
-void LogicalNotNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, bool fallThroughMeansTrue)
+void LogicalNotNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, FallThroughMode fallThroughMode)
{
- ASSERT(expr()->hasConditionContextCodegen());
-
// reverse the true and false targets
- generator.emitNodeInConditionContext(expr(), falseTarget, trueTarget, !fallThroughMeansTrue);
+ generator.emitNodeInConditionContext(expr(), falseTarget, trueTarget, invert(fallThroughMode));
}
ASSERT(isAdd());
ASSERT(resultDescriptor().definitelyIsString());
- IncreaseEmitNodeDepth stackGuard(generator, 3);
-
// 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
// 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());
-
+ generator.emitExpressionInfo(emitExpressionInfoForMe->divot(), emitExpressionInfoForMe->divotStart(), emitExpressionInfoForMe->divotEnd());
// If there is an assignment convert the lhs now. This will also copy lhs to
// the temporary register we allocated for it.
if (lhs)
return generator.emitStrcat(generator.finalDestination(dst, temporaryRegisters[0].get()), temporaryRegisters[0].get(), temporaryRegisters.size());
}
+void BinaryOpNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, FallThroughMode fallThroughMode)
+{
+ TriState branchCondition;
+ ExpressionNode* branchExpression;
+ tryFoldToBranch(generator, branchCondition, branchExpression);
+
+ if (branchCondition == MixedTriState)
+ ExpressionNode::emitBytecodeInConditionContext(generator, trueTarget, falseTarget, fallThroughMode);
+ else if (branchCondition == TrueTriState)
+ generator.emitNodeInConditionContext(branchExpression, trueTarget, falseTarget, fallThroughMode);
+ else
+ generator.emitNodeInConditionContext(branchExpression, falseTarget, trueTarget, invert(fallThroughMode));
+}
+
+static inline bool canFoldToBranch(OpcodeID opcodeID, ExpressionNode* branchExpression, JSValue constant)
+{
+ ResultType expressionType = branchExpression->resultDescriptor();
+
+ if (expressionType.definitelyIsBoolean() && constant.isBoolean())
+ return true;
+ else if (expressionType.definitelyIsBoolean() && constant.isInt32() && (constant.asInt32() == 0 || constant.asInt32() == 1))
+ return opcodeID == op_eq || opcodeID == op_neq; // Strict equality is false in the case of type mismatch.
+ else if (expressionType.isInt32() && constant.isInt32() && constant.asInt32() == 0)
+ return true;
+
+ return false;
+}
+
+void BinaryOpNode::tryFoldToBranch(BytecodeGenerator& generator, TriState& branchCondition, ExpressionNode*& branchExpression)
+{
+ branchCondition = MixedTriState;
+ branchExpression = 0;
+
+ ConstantNode* constant = 0;
+ if (m_expr1->isConstant()) {
+ constant = static_cast<ConstantNode*>(m_expr1);
+ branchExpression = m_expr2;
+ } else if (m_expr2->isConstant()) {
+ constant = static_cast<ConstantNode*>(m_expr2);
+ branchExpression = m_expr1;
+ }
+
+ if (!constant)
+ return;
+ ASSERT(branchExpression);
+
+ OpcodeID opcodeID = this->opcodeID();
+ JSValue value = constant->jsValue(generator);
+ bool canFoldToBranch = JSC::canFoldToBranch(opcodeID, branchExpression, value);
+ if (!canFoldToBranch)
+ return;
+
+ if (opcodeID == op_eq || opcodeID == op_stricteq)
+ branchCondition = triState(value.pureToBoolean());
+ else if (opcodeID == op_neq || opcodeID == op_nstricteq)
+ branchCondition = triState(!value.pureToBoolean());
+}
+
RegisterID* BinaryOpNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
OpcodeID opcodeID = this->opcodeID();
- if (opcodeID == op_add && m_expr1->isAdd() && m_expr1->resultDescriptor().definitelyIsString())
+ if (opcodeID == op_add && m_expr1->isAdd() && m_expr1->resultDescriptor().definitelyIsString()) {
+ generator.emitExpressionInfo(position(), position(), position());
return emitStrcat(generator, dst);
+ }
if (opcodeID == op_neq) {
if (m_expr1->isNull() || m_expr2->isNull()) {
}
}
- 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()));
+ ExpressionNode* left = m_expr1;
+ ExpressionNode* right = m_expr2;
+ if (opcodeID == op_neq || opcodeID == op_nstricteq) {
+ if (left->isString())
+ std::swap(left, right);
+ }
+
+ RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(left, m_rightHasAssignments, right->isPure(generator));
+ bool wasTypeof = generator.m_lastOpcodeID == op_typeof;
+ RefPtr<RegisterID> src2 = generator.emitNode(right);
+ generator.emitExpressionInfo(position(), position(), position());
+ if (wasTypeof && (opcodeID == op_neq || opcodeID == op_nstricteq)) {
+ RefPtr<RegisterID> tmp = generator.tempDestination(dst);
+ if (opcodeID == op_neq)
+ generator.emitEqualityOp(op_eq, generator.finalDestination(tmp.get(), src1.get()), src1.get(), src2.get());
+ else if (opcodeID == op_nstricteq)
+ generator.emitEqualityOp(op_stricteq, generator.finalDestination(tmp.get(), src1.get()), src1.get(), src2.get());
+ else
+ RELEASE_ASSERT_NOT_REACHED();
+ return generator.emitUnaryOp(op_not, generator.finalDestination(dst, tmp.get()), tmp.get());
+ }
+ RegisterID* result = generator.emitBinaryOp(opcodeID, generator.finalDestination(dst, src1.get()), src1.get(), src2.get(), OperandTypes(left->resultDescriptor(), right->resultDescriptor()));
+ if (opcodeID == op_urshift && dst != generator.ignoredResult())
+ return generator.emitUnaryOp(op_unsigned, result, result);
+ return result;
}
RegisterID* EqualNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
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);
+ ExpressionNode* left = m_expr1;
+ ExpressionNode* right = m_expr2;
+ if (left->isString())
+ std::swap(left, right);
+
+ RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(left, m_rightHasAssignments, m_expr2->isPure(generator));
+ RefPtr<RegisterID> src2 = generator.emitNode(right);
+ return generator.emitEqualityOp(op_eq, generator.finalDestination(dst, src1.get()), src1.get(), src2.get());
}
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);
-}
+ ExpressionNode* left = m_expr1;
+ ExpressionNode* right = m_expr2;
+ if (left->isString())
+ std::swap(left, right);
-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()));
+ RefPtr<RegisterID> src1 = generator.emitNodeForLeftHandSide(left, m_rightHasAssignments, m_expr2->isPure(generator));
+ RefPtr<RegisterID> src2 = generator.emitNode(right);
+ return generator.emitEqualityOp(op_stricteq, generator.finalDestination(dst, src1.get()), src1.get(), src2.get());
}
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()));
+ RefPtr<RegisterID> src2 = generator.emitNode(m_expr2);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ return generator.emitBinaryOp(opcodeID(), generator.finalDestination(dst, src1.get()), src1.get(), src2.get(), 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);
+ RefPtr<RegisterID> prototype = generator.newTemporary();
+ RefPtr<RegisterID> dstReg = generator.finalDestination(dst, src1.get());
+ RefPtr<Label> target = generator.newLabel();
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitGetByIdExceptionInfo(op_instanceof);
- RegisterID* src2Prototype = generator.emitGetById(generator.newTemporary(), src2.get(), generator.globalData()->propertyNames->prototype);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ generator.emitCheckHasInstance(dstReg.get(), src1.get(), src2.get(), target.get());
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- return generator.emitInstanceOf(generator.finalDestination(dst, src1.get()), src1.get(), src2.get(), src2Prototype);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ generator.emitGetById(prototype.get(), src2.get(), generator.vm()->propertyNames->prototype);
+
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RegisterID* result = generator.emitInstanceOf(dstReg.get(), src1.get(), prototype.get());
+ generator.emitLabel(target.get());
+ return result;
}
// ------------------------------ LogicalOpNode ----------------------------
return generator.moveToDestinationIfNeeded(dst, temp.get());
}
-void LogicalOpNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, bool fallThroughMeansTrue)
+void LogicalOpNode::emitBytecodeInConditionContext(BytecodeGenerator& generator, Label* trueTarget, Label* falseTarget, FallThroughMode fallThroughMode)
{
- if (m_expr1->hasConditionContextCodegen()) {
- RefPtr<Label> afterExpr1 = generator.newLabel();
- if (m_operator == OpLogicalAnd)
- generator.emitNodeInConditionContext(m_expr1, afterExpr1.get(), falseTarget, true);
- else
- generator.emitNodeInConditionContext(m_expr1, trueTarget, afterExpr1.get(), false);
- generator.emitLabel(afterExpr1.get());
- } else {
- RegisterID* temp = generator.emitNode(m_expr1);
- if (m_operator == OpLogicalAnd)
- generator.emitJumpIfFalse(temp, falseTarget);
- else
- generator.emitJumpIfTrue(temp, trueTarget);
- }
+ RefPtr<Label> afterExpr1 = generator.newLabel();
+ if (m_operator == OpLogicalAnd)
+ generator.emitNodeInConditionContext(m_expr1, afterExpr1.get(), falseTarget, FallThroughMeansTrue);
+ else
+ generator.emitNodeInConditionContext(m_expr1, trueTarget, afterExpr1.get(), FallThroughMeansFalse);
+ generator.emitLabel(afterExpr1.get());
- if (m_expr2->hasConditionContextCodegen())
- generator.emitNodeInConditionContext(m_expr2, trueTarget, falseTarget, fallThroughMeansTrue);
- else {
- RegisterID* temp = generator.emitNode(m_expr2);
- if (fallThroughMeansTrue)
- generator.emitJumpIfFalse(temp, falseTarget);
- else
- generator.emitJumpIfTrue(temp, trueTarget);
- }
+ generator.emitNodeInConditionContext(m_expr2, trueTarget, falseTarget, fallThroughMode);
}
// ------------------------------ ConditionalNode ------------------------------
RefPtr<Label> beforeElse = generator.newLabel();
RefPtr<Label> afterElse = generator.newLabel();
- if (m_logical->hasConditionContextCodegen()) {
- RefPtr<Label> beforeThen = generator.newLabel();
- generator.emitNodeInConditionContext(m_logical, beforeThen.get(), beforeElse.get(), true);
- generator.emitLabel(beforeThen.get());
- } else {
- RegisterID* cond = generator.emitNode(m_logical);
- generator.emitJumpIfFalse(cond, beforeElse.get());
- }
+ RefPtr<Label> beforeThen = generator.newLabel();
+ generator.emitNodeInConditionContext(m_logical, beforeThen.get(), beforeElse.get(), FallThroughMeansTrue);
+ generator.emitLabel(beforeThen.get());
generator.emitNode(newDst.get(), m_expr1);
generator.emitJump(afterElse.get());
opcodeID = op_mod;
break;
default:
- ASSERT_NOT_REACHED();
+ RELEASE_ASSERT_NOT_REACHED();
return dst;
}
// 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);
+ generator.emitExpressionInfo(emitExpressionInfoForMe->divot(), emitExpressionInfoForMe->divotStart(), emitExpressionInfoForMe->divotEnd());
+ RegisterID* result = generator.emitBinaryOp(opcodeID, dst, src1, src2, types);
+ if (oper == OpURShift)
+ return generator.emitUnaryOp(op_unsigned, result, result);
+ return result;
}
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 (Local local = generator.local(m_ident)) {
+ if (local.isReadOnly()) {
+ generator.emitReadOnlyExceptionIfNeeded();
+ return emitReadModifyAssignment(generator, generator.finalDestination(dst), local.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
}
- if (generator.leftHandSideNeedsCopy(m_rightHasAssignments, m_right->isPure(generator))) {
+ if (local.isCaptured()
+ || generator.leftHandSideNeedsCopy(m_rightHasAssignments, m_right->isPure(generator))) {
RefPtr<RegisterID> result = generator.newTemporary();
- generator.emitMove(result.get(), local);
+ generator.emitMove(result.get(), local.get());
emitReadModifyAssignment(generator, result.get(), result.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- generator.emitMove(local, result.get());
+ generator.emitMove(local.get(), result.get());
return generator.moveToDestinationIfNeeded(dst, result.get());
}
- RegisterID* result = emitReadModifyAssignment(generator, local, local, m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
+ RegisterID* result = emitReadModifyAssignment(generator, local.get(), local.get(), 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;
- bool requiresDynamicChecks = false;
- if (generator.findScopedProperty(m_ident, index, depth, true, requiresDynamicChecks, globalObject) && index != missingSymbolMarker() && !requiresDynamicChecks) {
- 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);
+ JSTextPosition newDivot = divotStart() + m_ident.length();
+ generator.emitExpressionInfo(newDivot, divotStart(), newDivot);
+ RefPtr<RegisterID> scope = generator.emitResolveScope(generator.newTemporary(), m_ident);
+ RefPtr<RegisterID> value = generator.emitGetFromScope(generator.newTemporary(), scope.get(), m_ident, ThrowIfNotFound);
+ RefPtr<RegisterID> result = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, m_operator, OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()), this);
+ return generator.emitPutToScope(scope.get(), m_ident, result.get(), ThrowIfNotFound);
}
// ------------------------------ AssignResolveNode -----------------------------------
RegisterID* AssignResolveNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- if (RegisterID* local = generator.registerFor(m_ident)) {
- if (generator.isLocalConstant(m_ident))
+ if (Local local = generator.local(m_ident)) {
+ if (local.isReadOnly()) {
+ generator.emitReadOnlyExceptionIfNeeded();
return generator.emitNode(dst, m_right);
-
- RegisterID* result = generator.emitNode(local, m_right);
+ }
+ if (local.isCaptured()) {
+ RefPtr<RegisterID> tempDst = generator.tempDestination(dst);
+ generator.emitNode(tempDst.get(), m_right);
+ generator.emitMove(local.get(), tempDst.get());
+ return generator.moveToDestinationIfNeeded(dst, tempDst.get());
+ }
+ RegisterID* result = generator.emitNode(local.get(), m_right);
return generator.moveToDestinationIfNeeded(dst, result);
}
- int index = 0;
- size_t depth = 0;
- JSObject* globalObject = 0;
- bool requiresDynamicChecks = false;
- if (generator.findScopedProperty(m_ident, index, depth, true, requiresDynamicChecks, globalObject) && index != missingSymbolMarker() && !requiresDynamicChecks) {
- 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 (generator.isStrictMode())
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RefPtr<RegisterID> scope = generator.emitResolveScope(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);
+ RefPtr<RegisterID> result = generator.emitNode(dst, m_right);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ return generator.emitPutToScope(scope.get(), m_ident, result.get(), generator.isStrictMode() ? ThrowIfNotFound : DoNotThrowIfNotFound);
}
// ------------------------------ AssignDotNode -----------------------------------
{
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);
+ RefPtr<RegisterID> result = generator.emitNode(value.get(), m_right);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RegisterID* forwardResult = (dst == generator.ignoredResult()) ? result.get() : generator.moveToDestinationIfNeeded(generator.tempDestination(result.get()), result.get());
+ generator.emitPutById(base.get(), m_ident, forwardResult);
+ return generator.moveToDestinationIfNeeded(dst, forwardResult);
}
// ------------------------------ ReadModifyDotNode -----------------------------------
{
RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_rightHasAssignments, m_right->isPure(generator));
- generator.emitExpressionInfo(divot() - m_subexpressionDivotOffset, startOffset() - m_subexpressionDivotOffset, m_subexpressionEndOffset);
+ generator.emitExpressionInfo(subexpressionDivot(), subexpressionStart(), subexpressionEnd());
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()));
+ RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, static_cast<JSC::Operator>(m_operator), OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
return generator.emitPutById(base.get(), m_ident, updatedValue);
}
RegisterID* AssignErrorNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
{
- return emitThrowError(generator, ReferenceError, "Left side of assignment is not a reference.");
+ return emitThrowReferenceError(generator, "Left side of assignment is not a reference.");
}
// ------------------------------ AssignBracketNode -----------------------------------
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);
+ RefPtr<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);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RegisterID* forwardResult = (dst == generator.ignoredResult()) ? result.get() : generator.moveToDestinationIfNeeded(generator.tempDestination(result.get()), result.get());
+ generator.emitPutByVal(base.get(), property.get(), forwardResult);
+ return generator.moveToDestinationIfNeeded(dst, forwardResult);
}
// ------------------------------ ReadModifyBracketNode -----------------------------------
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);
+ generator.emitExpressionInfo(subexpressionDivot(), subexpressionStart(), subexpressionEnd());
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()));
+ RegisterID* updatedValue = emitReadModifyAssignment(generator, generator.finalDestination(dst, value.get()), value.get(), m_right, static_cast<JSC::Operator>(m_operator), OperandTypes(ResultType::unknownType(), m_right->resultDescriptor()));
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
generator.emitPutByVal(base.get(), property.get(), updatedValue);
return updatedValue;
RegisterID* ConstDeclNode::emitCodeSingle(BytecodeGenerator& generator)
{
- if (RegisterID* local = generator.constRegisterFor(m_ident)) {
+ // FIXME: This code does not match the behavior of const in Firefox.
+ if (Local local = generator.constLocal(m_ident)) {
if (!m_init)
- return local;
+ return local.get();
- return generator.emitNode(local, m_init);
+ if (local.isCaptured()) {
+ RefPtr<RegisterID> tempDst = generator.newTemporary();
+ generator.emitNode(tempDst.get(), m_init);
+ return generator.emitMove(local.get(), tempDst.get());
+ }
+
+ return generator.emitNode(local.get(), m_init);
}
- if (generator.codeType() != EvalCode) {
- if (m_init)
- return generator.emitNode(m_init);
- else
- return generator.emitResolve(generator.newTemporary(), m_ident);
- }
- // 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);
+ RefPtr<RegisterID> value = m_init ? generator.emitNode(m_init) : generator.emitLoad(0, jsUndefined());
+
+ if (generator.codeType() == GlobalCode)
+ return generator.emitInitGlobalConst(m_ident, value.get());
+
+ if (generator.codeType() != EvalCode)
+ return value.get();
+
+ // FIXME: This will result in incorrect assignment if m_ident exists in an intervening with scope.
+ RefPtr<RegisterID> scope = generator.emitResolveScope(generator.newTemporary(), m_ident);
+ return generator.emitPutToScope(scope.get(), m_ident, value.get(), DoNotThrowIfNotFound);
}
RegisterID* ConstDeclNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
// ------------------------------ ConstStatementNode -----------------------------
-RegisterID* ConstStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+void ConstStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- return generator.emitNode(m_next);
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
+ generator.emitNode(m_next);
}
// ------------------------------ SourceElements -------------------------------
return m_statements ? m_statements->lastStatement() : 0;
}
-RegisterID* BlockNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+inline StatementNode* BlockNode::singleStatement() const
{
- if (m_statements)
- m_statements->emitBytecode(generator, dst);
- return 0;
+ return m_statements ? m_statements->singleStatement() : 0;
+}
+
+void BlockNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+ if (!m_statements)
+ return;
+ m_statements->emitBytecode(generator, dst);
}
// ------------------------------ EmptyStatementNode ---------------------------
-RegisterID* EmptyStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void EmptyStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- return dst;
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
}
// ------------------------------ DebuggerStatementNode ---------------------------
-RegisterID* DebuggerStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void DebuggerStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
{
- generator.emitDebugHook(DidReachBreakpoint, firstLine(), lastLine());
- return dst;
+ generator.emitDebugHook(DidReachBreakpoint, lastLine(), startOffset(), lineStartOffset());
}
// ------------------------------ ExprStatementNode ----------------------------
-RegisterID* ExprStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void ExprStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
ASSERT(m_expr);
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- return generator.emitNode(dst, m_expr);
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
+ generator.emitNode(dst, m_expr);
}
// ------------------------------ VarStatementNode ----------------------------
-RegisterID* VarStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+void VarStatementNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
{
ASSERT(m_expr);
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- return generator.emitNode(m_expr);
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
+ generator.emitNode(m_expr);
}
-// ------------------------------ IfNode ---------------------------------------
+// ------------------------------ IfElseNode ---------------------------------------
-RegisterID* IfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+static inline StatementNode* singleStatement(StatementNode* statementNode)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- RefPtr<Label> afterThen = generator.newLabel();
+ if (statementNode->isBlock())
+ return static_cast<BlockNode*>(statementNode)->singleStatement();
+ return statementNode;
+}
- if (m_condition->hasConditionContextCodegen()) {
- RefPtr<Label> beforeThen = generator.newLabel();
- generator.emitNodeInConditionContext(m_condition, beforeThen.get(), afterThen.get(), true);
- generator.emitLabel(beforeThen.get());
- } else {
- RegisterID* cond = generator.emitNode(m_condition);
- generator.emitJumpIfFalse(cond, afterThen.get());
+bool IfElseNode::tryFoldBreakAndContinue(BytecodeGenerator& generator, StatementNode* ifBlock,
+ Label*& trueTarget, FallThroughMode& fallThroughMode)
+{
+ StatementNode* singleStatement = JSC::singleStatement(ifBlock);
+ if (!singleStatement)
+ return false;
+
+ if (singleStatement->isBreak()) {
+ BreakNode* breakNode = static_cast<BreakNode*>(singleStatement);
+ Label* target = breakNode->trivialTarget(generator);
+ if (!target)
+ return false;
+ trueTarget = target;
+ fallThroughMode = FallThroughMeansFalse;
+ return true;
}
- generator.emitNode(dst, m_ifBlock);
- generator.emitLabel(afterThen.get());
+ if (singleStatement->isContinue()) {
+ ContinueNode* continueNode = static_cast<ContinueNode*>(singleStatement);
+ Label* target = continueNode->trivialTarget(generator);
+ if (!target)
+ return false;
+ trueTarget = target;
+ fallThroughMode = FallThroughMeansFalse;
+ return true;
+ }
- // FIXME: This should return the last statement executed so that it can be returned as a Completion.
- return 0;
+ return false;
}
-// ------------------------------ IfElseNode ---------------------------------------
-
-RegisterID* IfElseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void IfElseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
+ RefPtr<Label> beforeThen = generator.newLabel();
RefPtr<Label> beforeElse = generator.newLabel();
RefPtr<Label> afterElse = generator.newLabel();
- if (m_condition->hasConditionContextCodegen()) {
- RefPtr<Label> beforeThen = generator.newLabel();
- generator.emitNodeInConditionContext(m_condition, beforeThen.get(), beforeElse.get(), true);
- generator.emitLabel(beforeThen.get());
- } else {
- RegisterID* cond = generator.emitNode(m_condition);
- generator.emitJumpIfFalse(cond, beforeElse.get());
- }
+ Label* trueTarget = beforeThen.get();
+ Label* falseTarget = beforeElse.get();
+ FallThroughMode fallThroughMode = FallThroughMeansTrue;
+ bool didFoldIfBlock = tryFoldBreakAndContinue(generator, m_ifBlock, trueTarget, fallThroughMode);
- generator.emitNode(dst, m_ifBlock);
- generator.emitJump(afterElse.get());
+ generator.emitNodeInConditionContext(m_condition, trueTarget, falseTarget, fallThroughMode);
+ generator.emitLabel(beforeThen.get());
+
+ if (!didFoldIfBlock) {
+ generator.emitNode(dst, m_ifBlock);
+ if (m_elseBlock)
+ generator.emitJump(afterElse.get());
+ }
generator.emitLabel(beforeElse.get());
- generator.emitNode(dst, m_elseBlock);
+ if (m_elseBlock)
+ 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)
+void DoWhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
+ LabelScopePtr scope = generator.newLabelScope(LabelScope::Loop);
RefPtr<Label> topOfLoop = generator.newLabel();
generator.emitLabel(topOfLoop.get());
+ generator.emitLoopHint();
+ generator.emitDebugHook(WillExecuteStatement, lastLine(), startOffset(), lineStartOffset());
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- RefPtr<RegisterID> result = generator.emitNode(dst, m_statement);
+ generator.emitNode(dst, m_statement);
generator.emitLabel(scope->continueTarget());
- generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
- if (m_expr->hasConditionContextCodegen())
- generator.emitNodeInConditionContext(m_expr, topOfLoop.get(), scope->breakTarget(), false);
- else {
- RegisterID* cond = generator.emitNode(m_expr);
- generator.emitJumpIfTrue(cond, topOfLoop.get());
- }
+ generator.emitDebugHook(WillExecuteStatement, lastLine(), startOffset(), lineStartOffset());
+ generator.emitNodeInConditionContext(m_expr, topOfLoop.get(), scope->breakTarget(), FallThroughMeansFalse);
generator.emitLabel(scope->breakTarget());
- return result.get();
}
// ------------------------------ WhileNode ------------------------------------
-RegisterID* WhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void WhileNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
+ LabelScopePtr scope = generator.newLabelScope(LabelScope::Loop);
+ RefPtr<Label> topOfLoop = generator.newLabel();
- generator.emitJump(scope->continueTarget());
+ generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->startOffset(), m_expr->lineStartOffset());
+ generator.emitNodeInConditionContext(m_expr, topOfLoop.get(), scope->breakTarget(), FallThroughMeansTrue);
- RefPtr<Label> topOfLoop = generator.newLabel();
generator.emitLabel(topOfLoop.get());
+ generator.emitLoopHint();
generator.emitNode(dst, m_statement);
generator.emitLabel(scope->continueTarget());
- generator.emitDebugHook(WillExecuteStatement, m_expr->lineNo(), m_expr->lineNo());
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
- if (m_expr->hasConditionContextCodegen())
- generator.emitNodeInConditionContext(m_expr, topOfLoop.get(), scope->breakTarget(), false);
- else {
- RegisterID* cond = generator.emitNode(m_expr);
- generator.emitJumpIfTrue(cond, topOfLoop.get());
- }
+ generator.emitNodeInConditionContext(m_expr, topOfLoop.get(), scope->breakTarget(), FallThroughMeansFalse);
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)
+void ForNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Loop);
+ LabelScopePtr scope = generator.newLabelScope(LabelScope::Loop);
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
if (m_expr1)
generator.emitNode(generator.ignoredResult(), m_expr1);
-
- RefPtr<Label> condition = generator.newLabel();
- generator.emitJump(condition.get());
-
+
RefPtr<Label> topOfLoop = generator.newLabel();
+ if (m_expr2)
+ generator.emitNodeInConditionContext(m_expr2, topOfLoop.get(), scope->breakTarget(), FallThroughMeansTrue);
+
generator.emitLabel(topOfLoop.get());
+ generator.emitLoopHint();
- RefPtr<RegisterID> result = generator.emitNode(dst, m_statement);
+ generator.emitNode(dst, m_statement);
generator.emitLabel(scope->continueTarget());
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
if (m_expr3)
generator.emitNode(generator.ignoredResult(), m_expr3);
- generator.emitLabel(condition.get());
- if (m_expr2) {
- if (m_expr2->hasConditionContextCodegen())
- generator.emitNodeInConditionContext(m_expr2, topOfLoop.get(), scope->breakTarget(), false);
- else {
- RegisterID* cond = generator.emitNode(m_expr2);
- generator.emitJumpIfTrue(cond, topOfLoop.get());
- }
- } else
+ if (m_expr2)
+ generator.emitNodeInConditionContext(m_expr2, topOfLoop.get(), scope->breakTarget(), FallThroughMeansFalse);
+ else
generator.emitJump(topOfLoop.get());
generator.emitLabel(scope->breakTarget());
- return result.get();
}
// ------------------------------ ForInNode ------------------------------------
-RegisterID* ForInNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void ForInNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- IncreaseEmitNodeDepth stackGuard(generator);
-
- 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.");
+ LabelScopePtr scope = generator.newLabelScope(LabelScope::Loop);
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ if (!m_lexpr->isAssignmentLocation()) {
+ emitThrowReferenceError(generator, "Left side of for-in statement is not a reference.");
+ return;
+ }
- if (m_init)
- generator.emitNode(generator.ignoredResult(), m_init);
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
RefPtr<RegisterID> base = generator.newTemporary();
generator.emitNode(base.get(), m_expr);
RefPtr<Label> loopStart = generator.newLabel();
generator.emitLabel(loopStart.get());
+ generator.emitLoopHint();
RegisterID* propertyName;
bool optimizedForinAccess = false;
if (m_lexpr->isResolveNode()) {
const Identifier& ident = static_cast<ResolveNode*>(m_lexpr)->identifier();
- propertyName = generator.registerFor(ident);
- if (!propertyName) {
+ Local local = generator.local(ident);
+ if (!local.get()) {
propertyName = generator.newTemporary();
RefPtr<RegisterID> protect = propertyName;
- RegisterID* base = generator.emitResolveBase(generator.newTemporary(), ident);
-
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
- generator.emitPutById(base, ident, propertyName);
+ if (generator.isStrictMode())
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RegisterID* scope = generator.emitResolveScope(generator.newTemporary(), ident);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ generator.emitPutToScope(scope, ident, propertyName, generator.isStrictMode() ? ThrowIfNotFound : DoNotThrowIfNotFound);
} else {
- expectedSubscript = generator.emitMove(generator.newTemporary(), propertyName);
- generator.pushOptimisedForIn(expectedSubscript.get(), iter.get(), i.get(), propertyName);
+ expectedSubscript = generator.newTemporary();
+ propertyName = expectedSubscript.get();
+ generator.emitMove(local.get(), propertyName);
+ generator.pushOptimisedForIn(expectedSubscript.get(), iter.get(), i.get(), local.get());
optimizedForinAccess = true;
}
} else if (m_lexpr->isDotAccessorNode()) {
RefPtr<RegisterID> protect = propertyName;
RegisterID* base = generator.emitNode(assignNode->base());
- generator.emitExpressionInfo(assignNode->divot(), assignNode->startOffset(), assignNode->endOffset());
+ generator.emitExpressionInfo(assignNode->divot(), assignNode->divotStart(), assignNode->divotEnd());
generator.emitPutById(base, ident, propertyName);
- } else {
- ASSERT(m_lexpr->isBracketAccessorNode());
+ } else if (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.emitExpressionInfo(assignNode->divot(), assignNode->divotStart(), assignNode->divotEnd());
generator.emitPutByVal(base.get(), subscript, propertyName);
- }
+ } else {
+ ASSERT(m_lexpr->isDeconstructionNode());
+ DeconstructingAssignmentNode* assignNode = static_cast<DeconstructingAssignmentNode*>(m_lexpr);
+ auto binding = assignNode->bindings();
+ if (binding->isBindingNode()) {
+ auto simpleBinding = static_cast<BindingNode*>(binding);
+ Identifier ident = simpleBinding->boundProperty();
+ Local local = generator.local(ident);
+ propertyName = local.get();
+ if (!propertyName || local.isCaptured())
+ goto genericBinding;
+ expectedSubscript = generator.emitMove(generator.newTemporary(), propertyName);
+ generator.pushOptimisedForIn(expectedSubscript.get(), iter.get(), i.get(), propertyName);
+ optimizedForinAccess = true;
+ goto completedSimpleBinding;
+ } else {
+ genericBinding:
+ propertyName = generator.newTemporary();
+ RefPtr<RegisterID> protect(propertyName);
+ assignNode->bindings()->bindValue(generator, propertyName);
+ }
+ completedSimpleBinding:
+ ;
+ }
generator.emitNode(dst, m_statement);
generator.emitLabel(scope->continueTarget());
generator.emitNextPropertyName(propertyName, base.get(), i.get(), size.get(), iter.get(), loopStart.get());
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
generator.emitLabel(scope->breakTarget());
- return dst;
+}
+
+// ------------------------------ ForOfNode ------------------------------------
+void ForOfNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+ if (!m_lexpr->isAssignmentLocation()) {
+ emitThrowReferenceError(generator, "Left side of for-of statement is not a reference.");
+ return;
+ }
+
+ LabelScopePtr scope = generator.newLabelScope(LabelScope::Loop);
+
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
+ auto extractor = [this, dst](BytecodeGenerator& generator, RegisterID* value)
+ {
+ if (m_lexpr->isResolveNode()) {
+ const Identifier& ident = static_cast<ResolveNode*>(m_lexpr)->identifier();
+ if (Local local = generator.local(ident))
+ generator.emitMove(local.get(), value);
+ else {
+ if (generator.isStrictMode())
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ RegisterID* scope = generator.emitResolveScope(generator.newTemporary(), ident);
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
+ generator.emitPutToScope(scope, ident, value, generator.isStrictMode() ? ThrowIfNotFound : DoNotThrowIfNotFound);
+ }
+ } else if (m_lexpr->isDotAccessorNode()) {
+ DotAccessorNode* assignNode = static_cast<DotAccessorNode*>(m_lexpr);
+ const Identifier& ident = assignNode->identifier();
+ RefPtr<RegisterID> base = generator.emitNode(assignNode->base());
+
+ generator.emitExpressionInfo(assignNode->divot(), assignNode->divotStart(), assignNode->divotEnd());
+ generator.emitPutById(base.get(), ident, value);
+ } else if (m_lexpr->isBracketAccessorNode()) {
+ BracketAccessorNode* assignNode = static_cast<BracketAccessorNode*>(m_lexpr);
+ RefPtr<RegisterID> base = generator.emitNode(assignNode->base());
+ RegisterID* subscript = generator.emitNode(assignNode->subscript());
+
+ generator.emitExpressionInfo(assignNode->divot(), assignNode->divotStart(), assignNode->divotEnd());
+ generator.emitPutByVal(base.get(), subscript, value);
+ } else {
+ ASSERT(m_lexpr->isDeconstructionNode());
+ DeconstructingAssignmentNode* assignNode = static_cast<DeconstructingAssignmentNode*>(m_lexpr);
+ assignNode->bindings()->bindValue(generator, value);
+ }
+ generator.emitNode(dst, m_statement);
+ };
+ generator.emitEnumeration(this, m_expr, extractor);
}
// ------------------------------ ContinueNode ---------------------------------
-// ECMA 12.7
-RegisterID* ContinueNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+Label* ContinueNode::trivialTarget(BytecodeGenerator& generator)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- LabelScope* scope = generator.continueTarget(m_ident);
+ if (generator.shouldEmitDebugHooks())
+ return 0;
+
+ LabelScopePtr scope = generator.continueTarget(m_ident);
+ ASSERT(scope);
- if (!scope)
- return m_ident.isEmpty()
- ? emitThrowError(generator, SyntaxError, "Invalid continue statement.")
- : emitThrowError(generator, SyntaxError, "Undefined label: '%s'.", m_ident);
+ if (generator.scopeDepth() != scope->scopeDepth())
+ return 0;
- generator.emitJumpScopes(scope->continueTarget(), scope->scopeDepth());
- return dst;
+ return scope->continueTarget();
+}
+
+void ContinueNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
+
+ LabelScopePtr scope = generator.continueTarget(m_ident);
+ ASSERT(scope);
+
+ generator.emitPopScopes(scope->scopeDepth());
+ generator.emitJump(scope->continueTarget());
}
// ------------------------------ BreakNode ------------------------------------
-// ECMA 12.8
-RegisterID* BreakNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+Label* BreakNode::trivialTarget(BytecodeGenerator& generator)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
-
- LabelScope* scope = generator.breakTarget(m_ident);
+ if (generator.shouldEmitDebugHooks())
+ return 0;
+
+ LabelScopePtr scope = generator.breakTarget(m_ident);
+ ASSERT(scope);
+
+ if (generator.scopeDepth() != scope->scopeDepth())
+ return 0;
+
+ return scope->breakTarget();
+}
+
+void BreakNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+{
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
- if (!scope)
- return m_ident.isEmpty()
- ? emitThrowError(generator, SyntaxError, "Invalid break statement.")
- : emitThrowError(generator, SyntaxError, "Undefined label: '%s'.", m_ident);
+ LabelScopePtr scope = generator.breakTarget(m_ident);
+ ASSERT(scope);
- generator.emitJumpScopes(scope->breakTarget(), scope->scopeDepth());
- return dst;
+ generator.emitPopScopes(scope->scopeDepth());
+ generator.emitJump(scope->breakTarget());
}
// ------------------------------ ReturnNode -----------------------------------
-RegisterID* ReturnNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void ReturnNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
- if (generator.codeType() != FunctionCode)
- return emitThrowError(generator, SyntaxError, "Invalid return statement.");
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
+ ASSERT(generator.codeType() == FunctionCode);
if (dst == generator.ignoredResult())
dst = 0;
- RegisterID* r0 = m_value ? generator.emitNode(dst, m_value) : generator.emitLoad(dst, jsUndefined());
- RefPtr<RegisterID> returnRegister;
+
+ RefPtr<RegisterID> returnRegister = m_value ? generator.emitNode(dst, m_value) : generator.emitLoad(dst, jsUndefined());
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());
+ returnRegister = generator.emitMove(generator.newTemporary(), returnRegister.get());
+ generator.emitPopScopes(0);
}
- generator.emitDebugHook(WillLeaveCallFrame, firstLine(), lastLine());
- return generator.emitReturn(r0);
+
+ generator.emitDebugHook(WillLeaveCallFrame, lastLine(), startOffset(), lineStartOffset());
+ generator.emitReturn(returnRegister.get());
}
// ------------------------------ WithNode -------------------------------------
-RegisterID* WithNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void 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.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
+
+ RefPtr<RegisterID> scope = generator.emitNode(m_expr);
+ generator.emitExpressionInfo(m_divot, m_divot - m_expressionLength, m_divot);
+ generator.emitPushWithScope(scope.get());
+ generator.emitNode(dst, m_statement);
generator.emitPopScope();
- return result;
}
// ------------------------------ CaseClauseNode --------------------------------
inline void CaseClauseNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- if (m_statements)
- m_statements->emitBytecode(generator, dst);
+ if (!m_statements)
+ return;
+ m_statements->emitBytecode(generator, dst);
}
// ------------------------------ CaseBlockNode --------------------------------
typeForTable = SwitchNeither;
break;
}
- const UString& value = static_cast<StringNode*>(clauseExpression)->value().ustring();
- if (singleCharacterSwitch &= value.size() == 1) {
- int32_t intVal = value.rep()->characters()[0];
+ const String& value = static_cast<StringNode*>(clauseExpression)->value().string();
+ if (singleCharacterSwitch &= value.length() == 1) {
+ int32_t intVal = value[0];
if (intVal < min_num)
min_num = intVal;
if (intVal > max_num)
break;
}
}
-
-SwitchInfo::SwitchType CaseBlockNode::tryOptimizedSwitch(Vector<ExpressionNode*, 8>& literalVector, int32_t& min_num, int32_t& max_num)
+
+static inline size_t length(ClauseListNode* list1, ClauseListNode* list2)
+{
+ size_t length = 0;
+ for (ClauseListNode* node = list1; node; node = node->getNext())
+ ++length;
+ for (ClauseListNode* node = list2; node; node = node->getNext())
+ ++length;
+ return length;
+}
+
+SwitchInfo::SwitchType CaseBlockNode::tryTableSwitch(Vector<ExpressionNode*, 8>& literalVector, int32_t& min_num, int32_t& max_num)
{
+ if (length(m_list1, m_list2) < s_tableSwitchMinimum)
+ return SwitchInfo::SwitchNone;
+
SwitchKind typeForTable = SwitchUnset;
bool singleCharacterSwitch = true;
return SwitchInfo::SwitchString;
}
-RegisterID* CaseBlockNode::emitBytecodeForBlock(BytecodeGenerator& generator, RegisterID* switchExpression, RegisterID* dst)
+void 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);
+ SwitchInfo::SwitchType switchType = tryTableSwitch(literalVector, min_num, max_num);
if (switchType != SwitchInfo::SwitchNone) {
// Prepare the various labels
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());
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)
+void SwitchNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::Switch);
+ LabelScopePtr scope = generator.newLabelScope(LabelScope::Switch);
RefPtr<RegisterID> r0 = generator.emitNode(m_expr);
- RegisterID* r1 = m_block->emitBytecodeForBlock(generator, r0.get(), dst);
+ m_block->emitBytecodeForBlock(generator, r0.get(), dst);
generator.emitLabel(scope->breakTarget());
- return r1;
}
// ------------------------------ LabelNode ------------------------------------
-RegisterID* LabelNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void LabelNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
- if (generator.breakTarget(m_name))
- return emitThrowError(generator, SyntaxError, "Duplicate label: %s.", m_name);
+ ASSERT(!generator.breakTarget(m_name));
- RefPtr<LabelScope> scope = generator.newLabelScope(LabelScope::NamedLabel, &m_name);
- RegisterID* r0 = generator.emitNode(dst, m_statement);
+ LabelScopePtr scope = generator.newLabelScope(LabelScope::NamedLabel, &m_name);
+ generator.emitNode(dst, m_statement);
generator.emitLabel(scope->breakTarget());
- return r0;
}
// ------------------------------ ThrowNode ------------------------------------
-RegisterID* ThrowNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void ThrowNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
if (dst == generator.ignoredResult())
dst = 0;
RefPtr<RegisterID> expr = generator.emitNode(m_expr);
- generator.emitExpressionInfo(divot(), startOffset(), endOffset());
+ generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
generator.emitThrow(expr.get());
- return 0;
}
// ------------------------------ TryNode --------------------------------------
-RegisterID* TryNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void TryNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
// NOTE: The catch and finally blocks must be labeled explicitly, so the
// optimizer knows they may be jumped to from anywhere.
- IncreaseEmitNodeDepth stackGuard(generator);
+ generator.emitDebugHook(WillExecuteStatement, firstLine(), startOffset(), lineStartOffset());
- generator.emitDebugHook(WillExecuteStatement, firstLine(), lastLine());
+ ASSERT(m_catchBlock || m_finallyBlock);
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());
+
+ if (m_finallyBlock)
+ generator.pushFinallyContext(m_finallyBlock);
+ TryData* tryData = generator.pushTry(tryStartLabel.get());
+
generator.emitNode(dst, m_tryBlock);
if (m_catchBlock) {
// 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());
+ RefPtr<RegisterID> exceptionRegister = generator.popTryAndEmitCatch(tryData, generator.newTemporary(), here.get());
+
+ if (m_finallyBlock) {
+ // If the catch block throws an exception and we have a finally block, then the finally
+ // block should "catch" that exception.
+ tryData = generator.pushTry(here.get());
+ }
+
+ generator.emitPushCatchScope(m_exceptionIdent, exceptionRegister.get(), DontDelete);
generator.emitNode(dst, m_catchBlock);
generator.emitPopScope();
generator.emitLabel(catchEndLabel.get());
}
if (m_finallyBlock) {
+ RefPtr<Label> preFinallyLabel = generator.emitLabel(generator.newLabel().get());
+
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());
+ // Normal path: run the finally code, and jump to the end.
+ generator.emitNode(dst, m_finallyBlock);
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());
+ RefPtr<RegisterID> tempExceptionRegister = generator.popTryAndEmitCatch(tryData, generator.newTemporary(), preFinallyLabel.get());
generator.emitNode(dst, m_finallyBlock);
- generator.emitSubroutineReturn(finallyReturnAddr.get());
+ generator.emitThrow(tempExceptionRegister.get());
generator.emitLabel(finallyEndLabel.get());
}
-
- return dst;
}
// ------------------------------ ScopeNode -----------------------------
inline void ScopeNode::emitStatementsBytecode(BytecodeGenerator& generator, RegisterID* dst)
{
- if (m_data->m_statements)
- m_data->m_statements->emitBytecode(generator, dst);
+ if (!m_statements)
+ return;
+ m_statements->emitBytecode(generator, dst);
}
// ------------------------------ ProgramNode -----------------------------
-RegisterID* ProgramNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+void ProgramNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
{
- generator.emitDebugHook(WillExecuteProgram, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteProgram, startLine(), startStartOffset(), startLineStartOffset());
RefPtr<RegisterID> dstRegister = generator.newTemporary();
generator.emitLoad(dstRegister.get(), jsUndefined());
emitStatementsBytecode(generator, dstRegister.get());
- generator.emitDebugHook(DidExecuteProgram, firstLine(), lastLine());
+ generator.emitDebugHook(DidExecuteProgram, lastLine(), startOffset(), lineStartOffset());
generator.emitEnd(dstRegister.get());
- return 0;
}
// ------------------------------ EvalNode -----------------------------
-RegisterID* EvalNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+void EvalNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
{
- generator.emitDebugHook(WillExecuteProgram, firstLine(), lastLine());
+ generator.emitDebugHook(WillExecuteProgram, startLine(), startStartOffset(), startLineStartOffset());
RefPtr<RegisterID> dstRegister = generator.newTemporary();
generator.emitLoad(dstRegister.get(), jsUndefined());
emitStatementsBytecode(generator, dstRegister.get());
- generator.emitDebugHook(DidExecuteProgram, firstLine(), lastLine());
+ generator.emitDebugHook(DidExecuteProgram, lastLine(), startOffset(), lineStartOffset());
generator.emitEnd(dstRegister.get());
- return 0;
}
// ------------------------------ FunctionBodyNode -----------------------------
-RegisterID* FunctionBodyNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
+void FunctionBodyNode::emitBytecode(BytecodeGenerator& generator, RegisterID*)
{
- generator.emitDebugHook(DidEnterCallFrame, firstLine(), lastLine());
+ generator.emitDebugHook(DidEnterCallFrame, startLine(), startStartOffset(), startLineStartOffset());
emitStatementsBytecode(generator, generator.ignoredResult());
+
StatementNode* singleStatement = this->singleStatement();
+ ReturnNode* returnNode = 0;
+
+ // Check for a return statement at the end of a function composed of a single block.
if (singleStatement && singleStatement->isBlock()) {
StatementNode* lastStatementInBlock = static_cast<BlockNode*>(singleStatement)->lastStatement();
if (lastStatementInBlock && lastStatementInBlock->isReturnNode())
- return 0;
+ returnNode = static_cast<ReturnNode*>(lastStatementInBlock);
}
- RegisterID* r0 = generator.emitLoad(0, jsUndefined());
- generator.emitDebugHook(WillLeaveCallFrame, firstLine(), lastLine());
- generator.emitReturn(r0);
- return 0;
+ // If there is no return we must automatically insert one.
+ if (!returnNode) {
+ RegisterID* r0 = generator.isConstructor() ? generator.thisRegister() : generator.emitLoad(0, jsUndefined());
+ ASSERT(startOffset() >= lineStartOffset());
+ generator.emitDebugHook(WillLeaveCallFrame, lastLine(), startOffset(), lineStartOffset());
+ generator.emitReturn(r0);
+ return;
+ }
+
+ // If there is a return statment, and it is the only statement in the function, check if this is a numeric compare.
+ if (static_cast<BlockNode*>(singleStatement)->singleStatement()) {
+ ExpressionNode* returnValueExpression = returnNode->value();
+ if (returnValueExpression && returnValueExpression->isSubtract()) {
+ ExpressionNode* lhsExpression = static_cast<SubNode*>(returnValueExpression)->lhs();
+ ExpressionNode* rhsExpression = static_cast<SubNode*>(returnValueExpression)->rhs();
+ if (lhsExpression->isResolveNode()
+ && rhsExpression->isResolveNode()
+ && generator.isArgumentNumber(static_cast<ResolveNode*>(lhsExpression)->identifier(), 0)
+ && generator.isArgumentNumber(static_cast<ResolveNode*>(rhsExpression)->identifier(), 1)) {
+
+ generator.setIsNumericCompareFunction(true);
+ }
+ }
+ }
}
// ------------------------------ FuncDeclNode ---------------------------------
-RegisterID* FuncDeclNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+void FuncDeclNode::emitBytecode(BytecodeGenerator&, RegisterID*)
{
- if (dst == generator.ignoredResult())
- dst = 0;
- return dst;
}
// ------------------------------ FuncExprNode ---------------------------------
{
return generator.emitNewFunctionExpression(generator.finalDestination(dst), this);
}
+
+// ------------------------------ DeconstructingAssignmentNode -----------------
+RegisterID* DeconstructingAssignmentNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+ if (RegisterID* result = m_bindings->emitDirectBinding(generator, dst, m_initializer))
+ return result;
+ RefPtr<RegisterID> initializer = generator.tempDestination(dst);
+ generator.emitNode(initializer.get(), m_initializer);
+ m_bindings->bindValue(generator, initializer.get());
+ return generator.moveToDestinationIfNeeded(dst, initializer.get());
+}
+
+DeconstructionPatternNode::~DeconstructionPatternNode()
+{
+}
+
+void ArrayPatternNode::bindValue(BytecodeGenerator& generator, RegisterID* rhs) const
+{
+ for (size_t i = 0; i < m_targetPatterns.size(); i++) {
+ auto target = m_targetPatterns[i];
+ if (!target)
+ continue;
+ RefPtr<RegisterID> temp = generator.newTemporary();
+ generator.emitLoad(temp.get(), jsNumber(i));
+ generator.emitGetByVal(temp.get(), rhs, temp.get());
+ target->bindValue(generator, temp.get());
+ }
+}
+
+RegisterID* ArrayPatternNode::emitDirectBinding(BytecodeGenerator& generator, RegisterID* dst, ExpressionNode* rhs)
+{
+ if (rhs->isResolveNode()
+ && generator.willResolveToArguments(static_cast<ResolveNode*>(rhs)->identifier())
+ && !generator.symbolTable().slowArguments()) {
+ for (size_t i = 0; i < m_targetPatterns.size(); i++) {
+ auto target = m_targetPatterns[i];
+ if (!target)
+ continue;
+
+ RefPtr<RegisterID> temp = generator.newTemporary();
+ generator.emitLoad(temp.get(), jsNumber(i));
+ generator.emitGetArgumentByVal(temp.get(), generator.uncheckedRegisterForArguments(), temp.get());
+ target->bindValue(generator, temp.get());
+ }
+ if (dst == generator.ignoredResult() || !dst)
+ return generator.emitLoad(generator.finalDestination(dst), jsUndefined());
+ Local local = generator.local(generator.vm()->propertyNames->arguments);
+ return generator.moveToDestinationIfNeeded(dst, local.get());
+ }
+ if (!rhs->isSimpleArray())
+ return 0;
+
+ RefPtr<RegisterID> resultRegister;
+ if (dst && dst != generator.ignoredResult())
+ resultRegister = generator.emitNewArray(generator.newTemporary(), 0, 0);
+ ElementNode* elementNodes = static_cast<ArrayNode*>(rhs)->elements();
+ Vector<ExpressionNode*> elements;
+ for (; elementNodes; elementNodes = elementNodes->next())
+ elements.append(elementNodes->value());
+ if (m_targetPatterns.size() != elements.size())
+ return 0;
+ Vector<RefPtr<RegisterID>> registers;
+ registers.reserveCapacity(m_targetPatterns.size());
+ for (size_t i = 0; i < m_targetPatterns.size(); i++) {
+ registers.uncheckedAppend(generator.newTemporary());
+ generator.emitNode(registers.last().get(), elements[i]);
+ if (resultRegister)
+ generator.emitPutByIndex(resultRegister.get(), i, registers.last().get());
+ }
+
+ for (size_t i = 0; i < m_targetPatterns.size(); i++) {
+ if (m_targetPatterns[i])
+ m_targetPatterns[i]->bindValue(generator, registers[i].get());
+ }
+ if (resultRegister)
+ return generator.moveToDestinationIfNeeded(dst, resultRegister.get());
+ return generator.emitLoad(generator.finalDestination(dst), jsUndefined());
+}
+
+void ArrayPatternNode::toString(StringBuilder& builder) const
+{
+ builder.append('[');
+ for (size_t i = 0; i < m_targetPatterns.size(); i++) {
+ if (!m_targetPatterns[i]) {
+ builder.append(',');
+ continue;
+ }
+ m_targetPatterns[i]->toString(builder);
+ if (i < m_targetPatterns.size() - 1)
+ builder.append(',');
+ }
+ builder.append(']');
+}
+
+void ArrayPatternNode::collectBoundIdentifiers(Vector<Identifier>& identifiers) const
+{
+ for (size_t i = 0; i < m_targetPatterns.size(); i++) {
+ if (DeconstructionPatternNode* node = m_targetPatterns[i].get())
+ node->collectBoundIdentifiers(identifiers);
+ }
+}
+
+void ObjectPatternNode::toString(StringBuilder& builder) const
+{
+ builder.append('{');
+ for (size_t i = 0; i < m_targetPatterns.size(); i++) {
+ if (m_targetPatterns[i].wasString) {
+ builder.append('"');
+ escapeStringToBuilder(builder, m_targetPatterns[i].propertyName.string());
+ builder.append('"');
+ } else
+ builder.append(m_targetPatterns[i].propertyName.string());
+ builder.append(":");
+ m_targetPatterns[i].pattern->toString(builder);
+ if (i < m_targetPatterns.size() - 1)
+ builder.append(',');
+ }
+ builder.append('}');
+}
+
+void ObjectPatternNode::bindValue(BytecodeGenerator& generator, RegisterID* rhs) const
+{
+ for (size_t i = 0; i < m_targetPatterns.size(); i++) {
+ auto& target = m_targetPatterns[i];
+ RefPtr<RegisterID> temp = generator.newTemporary();
+ generator.emitGetById(temp.get(), rhs, target.propertyName);
+ target.pattern->bindValue(generator, temp.get());
+ }
+}
+
+void ObjectPatternNode::collectBoundIdentifiers(Vector<Identifier>& identifiers) const
+{
+ for (size_t i = 0; i < m_targetPatterns.size(); i++)
+ m_targetPatterns[i].pattern->collectBoundIdentifiers(identifiers);
+}
+
+void BindingNode::bindValue(BytecodeGenerator& generator, RegisterID* value) const
+{
+ if (Local local = generator.local(m_boundProperty)) {
+ if (local.isReadOnly()) {
+ generator.emitReadOnlyExceptionIfNeeded();
+ return;
+ }
+ generator.emitMove(local.get(), value);
+ return;
+ }
+ if (generator.isStrictMode())
+ generator.emitExpressionInfo(divotEnd(), divotStart(), divotEnd());
+ RegisterID* scope = generator.emitResolveScope(generator.newTemporary(), m_boundProperty);
+ generator.emitExpressionInfo(divotEnd(), divotStart(), divotEnd());
+ generator.emitPutToScope(scope, m_boundProperty, value, generator.isStrictMode() ? ThrowIfNotFound : DoNotThrowIfNotFound);
+ return;
+}
+
+void BindingNode::toString(StringBuilder& builder) const
+{
+ builder.append(m_boundProperty.string());
+}
+
+void BindingNode::collectBoundIdentifiers(Vector<Identifier>& identifiers) const
+{
+ identifiers.append(m_boundProperty);
+}
+
+RegisterID* SpreadExpressionNode::emitBytecode(BytecodeGenerator&, RegisterID*)
+{
+ RELEASE_ASSERT_NOT_REACHED();
+ return 0;
+}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff