Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/src/ast/ast-numbering.cc b/src/ast/ast-numbering.cc
new file mode 100644
index 0000000..6c2b696
--- /dev/null
+++ b/src/ast/ast-numbering.cc
@@ -0,0 +1,607 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/ast/ast-numbering.h"
+
+#include "src/ast/ast.h"
+#include "src/ast/scopes.h"
+
+namespace v8 {
+namespace internal {
+
+class AstNumberingVisitor final : public AstVisitor {
+ public:
+ AstNumberingVisitor(Isolate* isolate, Zone* zone)
+ : AstVisitor(),
+ isolate_(isolate),
+ zone_(zone),
+ next_id_(BailoutId::FirstUsable().ToInt()),
+ properties_(zone),
+ slot_cache_(zone),
+ dont_optimize_reason_(kNoReason) {
+ InitializeAstVisitor(isolate);
+ }
+
+ bool Renumber(FunctionLiteral* node);
+
+ private:
+// AST node visitor interface.
+#define DEFINE_VISIT(type) void Visit##type(type* node) override;
+ AST_NODE_LIST(DEFINE_VISIT)
+#undef DEFINE_VISIT
+
+ bool Finish(FunctionLiteral* node);
+
+ void VisitVariableProxyReference(VariableProxy* node);
+ void VisitPropertyReference(Property* node);
+ void VisitReference(Expression* expr);
+
+ void VisitStatements(ZoneList<Statement*>* statements) override;
+ void VisitDeclarations(ZoneList<Declaration*>* declarations) override;
+ void VisitArguments(ZoneList<Expression*>* arguments);
+ void VisitObjectLiteralProperty(ObjectLiteralProperty* property);
+
+ int ReserveIdRange(int n) {
+ int tmp = next_id_;
+ next_id_ += n;
+ return tmp;
+ }
+
+ void IncrementNodeCount() { properties_.add_node_count(1); }
+ void DisableSelfOptimization() {
+ properties_.flags() |= AstProperties::kDontSelfOptimize;
+ }
+ void DisableOptimization(BailoutReason reason) {
+ dont_optimize_reason_ = reason;
+ DisableSelfOptimization();
+ }
+ void DisableCrankshaft(BailoutReason reason) {
+ if (FLAG_turbo_shipping) {
+ properties_.flags() |= AstProperties::kDontCrankshaft;
+ } else {
+ dont_optimize_reason_ = reason;
+ DisableSelfOptimization();
+ }
+ }
+
+ template <typename Node>
+ void ReserveFeedbackSlots(Node* node) {
+ node->AssignFeedbackVectorSlots(isolate_, properties_.get_spec(),
+ &slot_cache_);
+ }
+
+ BailoutReason dont_optimize_reason() const { return dont_optimize_reason_; }
+
+ Isolate* isolate_;
+ Zone* zone_;
+ int next_id_;
+ AstProperties properties_;
+ // The slot cache allows us to reuse certain feedback vector slots.
+ FeedbackVectorSlotCache slot_cache_;
+ BailoutReason dont_optimize_reason_;
+
+ DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
+ DISALLOW_COPY_AND_ASSIGN(AstNumberingVisitor);
+};
+
+
+void AstNumberingVisitor::VisitVariableDeclaration(VariableDeclaration* node) {
+ IncrementNodeCount();
+ VisitVariableProxy(node->proxy());
+}
+
+
+void AstNumberingVisitor::VisitExportDeclaration(ExportDeclaration* node) {
+ IncrementNodeCount();
+ DisableOptimization(kExportDeclaration);
+ VisitVariableProxy(node->proxy());
+}
+
+
+void AstNumberingVisitor::VisitEmptyStatement(EmptyStatement* node) {
+ IncrementNodeCount();
+}
+
+
+void AstNumberingVisitor::VisitSloppyBlockFunctionStatement(
+ SloppyBlockFunctionStatement* node) {
+ IncrementNodeCount();
+ Visit(node->statement());
+}
+
+
+void AstNumberingVisitor::VisitContinueStatement(ContinueStatement* node) {
+ IncrementNodeCount();
+}
+
+
+void AstNumberingVisitor::VisitBreakStatement(BreakStatement* node) {
+ IncrementNodeCount();
+}
+
+
+void AstNumberingVisitor::VisitDebuggerStatement(DebuggerStatement* node) {
+ IncrementNodeCount();
+ DisableOptimization(kDebuggerStatement);
+ node->set_base_id(ReserveIdRange(DebuggerStatement::num_ids()));
+}
+
+
+void AstNumberingVisitor::VisitNativeFunctionLiteral(
+ NativeFunctionLiteral* node) {
+ IncrementNodeCount();
+ DisableOptimization(kNativeFunctionLiteral);
+ node->set_base_id(ReserveIdRange(NativeFunctionLiteral::num_ids()));
+}
+
+
+void AstNumberingVisitor::VisitDoExpression(DoExpression* node) {
+ IncrementNodeCount();
+ DisableCrankshaft(kDoExpression);
+ node->set_base_id(ReserveIdRange(DoExpression::num_ids()));
+ Visit(node->block());
+ Visit(node->result());
+}
+
+
+void AstNumberingVisitor::VisitLiteral(Literal* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(Literal::num_ids()));
+}
+
+
+void AstNumberingVisitor::VisitRegExpLiteral(RegExpLiteral* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(RegExpLiteral::num_ids()));
+}
+
+
+void AstNumberingVisitor::VisitVariableProxyReference(VariableProxy* node) {
+ IncrementNodeCount();
+ if (node->var()->IsLookupSlot()) {
+ DisableCrankshaft(kReferenceToAVariableWhichRequiresDynamicLookup);
+ }
+ node->set_base_id(ReserveIdRange(VariableProxy::num_ids()));
+}
+
+
+void AstNumberingVisitor::VisitVariableProxy(VariableProxy* node) {
+ VisitVariableProxyReference(node);
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitThisFunction(ThisFunction* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(ThisFunction::num_ids()));
+}
+
+
+void AstNumberingVisitor::VisitSuperPropertyReference(
+ SuperPropertyReference* node) {
+ IncrementNodeCount();
+ DisableCrankshaft(kSuperReference);
+ node->set_base_id(ReserveIdRange(SuperPropertyReference::num_ids()));
+ Visit(node->this_var());
+ Visit(node->home_object());
+}
+
+
+void AstNumberingVisitor::VisitSuperCallReference(SuperCallReference* node) {
+ IncrementNodeCount();
+ DisableCrankshaft(kSuperReference);
+ node->set_base_id(ReserveIdRange(SuperCallReference::num_ids()));
+ Visit(node->this_var());
+ Visit(node->new_target_var());
+ Visit(node->this_function_var());
+}
+
+
+void AstNumberingVisitor::VisitImportDeclaration(ImportDeclaration* node) {
+ IncrementNodeCount();
+ DisableOptimization(kImportDeclaration);
+ VisitVariableProxy(node->proxy());
+}
+
+
+void AstNumberingVisitor::VisitExpressionStatement(ExpressionStatement* node) {
+ IncrementNodeCount();
+ Visit(node->expression());
+}
+
+
+void AstNumberingVisitor::VisitReturnStatement(ReturnStatement* node) {
+ IncrementNodeCount();
+ Visit(node->expression());
+}
+
+
+void AstNumberingVisitor::VisitYield(Yield* node) {
+ IncrementNodeCount();
+ DisableOptimization(kYield);
+ ReserveFeedbackSlots(node);
+ node->set_base_id(ReserveIdRange(Yield::num_ids()));
+ Visit(node->generator_object());
+ Visit(node->expression());
+}
+
+
+void AstNumberingVisitor::VisitThrow(Throw* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(Throw::num_ids()));
+ Visit(node->exception());
+}
+
+
+void AstNumberingVisitor::VisitUnaryOperation(UnaryOperation* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(UnaryOperation::num_ids()));
+ Visit(node->expression());
+}
+
+
+void AstNumberingVisitor::VisitCountOperation(CountOperation* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(CountOperation::num_ids()));
+ Visit(node->expression());
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitBlock(Block* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(Block::num_ids()));
+ if (node->scope() != NULL) VisitDeclarations(node->scope()->declarations());
+ VisitStatements(node->statements());
+}
+
+
+void AstNumberingVisitor::VisitFunctionDeclaration(FunctionDeclaration* node) {
+ IncrementNodeCount();
+ VisitVariableProxy(node->proxy());
+ VisitFunctionLiteral(node->fun());
+}
+
+
+void AstNumberingVisitor::VisitCallRuntime(CallRuntime* node) {
+ IncrementNodeCount();
+ ReserveFeedbackSlots(node);
+ if (node->is_jsruntime()) {
+ // Don't try to optimize JS runtime calls because we bailout on them.
+ DisableOptimization(kCallToAJavaScriptRuntimeFunction);
+ }
+ node->set_base_id(ReserveIdRange(CallRuntime::num_ids()));
+ VisitArguments(node->arguments());
+}
+
+
+void AstNumberingVisitor::VisitWithStatement(WithStatement* node) {
+ IncrementNodeCount();
+ DisableCrankshaft(kWithStatement);
+ node->set_base_id(ReserveIdRange(WithStatement::num_ids()));
+ Visit(node->expression());
+ Visit(node->statement());
+}
+
+
+void AstNumberingVisitor::VisitDoWhileStatement(DoWhileStatement* node) {
+ IncrementNodeCount();
+ DisableSelfOptimization();
+ node->set_base_id(ReserveIdRange(DoWhileStatement::num_ids()));
+ Visit(node->body());
+ Visit(node->cond());
+}
+
+
+void AstNumberingVisitor::VisitWhileStatement(WhileStatement* node) {
+ IncrementNodeCount();
+ DisableSelfOptimization();
+ node->set_base_id(ReserveIdRange(WhileStatement::num_ids()));
+ Visit(node->cond());
+ Visit(node->body());
+}
+
+
+void AstNumberingVisitor::VisitTryCatchStatement(TryCatchStatement* node) {
+ IncrementNodeCount();
+ DisableOptimization(kTryCatchStatement);
+ node->set_base_id(ReserveIdRange(TryCatchStatement::num_ids()));
+ Visit(node->try_block());
+ Visit(node->catch_block());
+}
+
+
+void AstNumberingVisitor::VisitTryFinallyStatement(TryFinallyStatement* node) {
+ IncrementNodeCount();
+ DisableOptimization(kTryFinallyStatement);
+ node->set_base_id(ReserveIdRange(TryFinallyStatement::num_ids()));
+ Visit(node->try_block());
+ Visit(node->finally_block());
+}
+
+
+void AstNumberingVisitor::VisitPropertyReference(Property* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(Property::num_ids()));
+ Visit(node->key());
+ Visit(node->obj());
+}
+
+
+void AstNumberingVisitor::VisitReference(Expression* expr) {
+ DCHECK(expr->IsProperty() || expr->IsVariableProxy());
+ if (expr->IsProperty()) {
+ VisitPropertyReference(expr->AsProperty());
+ } else {
+ VisitVariableProxyReference(expr->AsVariableProxy());
+ }
+}
+
+
+void AstNumberingVisitor::VisitProperty(Property* node) {
+ VisitPropertyReference(node);
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitAssignment(Assignment* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(Assignment::num_ids()));
+
+ if (node->is_compound()) VisitBinaryOperation(node->binary_operation());
+ VisitReference(node->target());
+ Visit(node->value());
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitBinaryOperation(BinaryOperation* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(BinaryOperation::num_ids()));
+ Visit(node->left());
+ Visit(node->right());
+}
+
+
+void AstNumberingVisitor::VisitCompareOperation(CompareOperation* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(CompareOperation::num_ids()));
+ Visit(node->left());
+ Visit(node->right());
+}
+
+
+void AstNumberingVisitor::VisitSpread(Spread* node) {
+ IncrementNodeCount();
+ DisableCrankshaft(kSpread);
+ Visit(node->expression());
+}
+
+
+void AstNumberingVisitor::VisitEmptyParentheses(EmptyParentheses* node) {
+ UNREACHABLE();
+}
+
+
+void AstNumberingVisitor::VisitForInStatement(ForInStatement* node) {
+ IncrementNodeCount();
+ DisableSelfOptimization();
+ node->set_base_id(ReserveIdRange(ForInStatement::num_ids()));
+ Visit(node->each());
+ Visit(node->enumerable());
+ Visit(node->body());
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitForOfStatement(ForOfStatement* node) {
+ IncrementNodeCount();
+ DisableCrankshaft(kForOfStatement);
+ node->set_base_id(ReserveIdRange(ForOfStatement::num_ids()));
+ Visit(node->assign_iterator());
+ Visit(node->next_result());
+ Visit(node->result_done());
+ Visit(node->assign_each());
+ Visit(node->body());
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitConditional(Conditional* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(Conditional::num_ids()));
+ Visit(node->condition());
+ Visit(node->then_expression());
+ Visit(node->else_expression());
+}
+
+
+void AstNumberingVisitor::VisitIfStatement(IfStatement* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(IfStatement::num_ids()));
+ Visit(node->condition());
+ Visit(node->then_statement());
+ if (node->HasElseStatement()) {
+ Visit(node->else_statement());
+ }
+}
+
+
+void AstNumberingVisitor::VisitSwitchStatement(SwitchStatement* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(SwitchStatement::num_ids()));
+ Visit(node->tag());
+ ZoneList<CaseClause*>* cases = node->cases();
+ for (int i = 0; i < cases->length(); i++) {
+ VisitCaseClause(cases->at(i));
+ }
+}
+
+
+void AstNumberingVisitor::VisitCaseClause(CaseClause* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(CaseClause::num_ids()));
+ if (!node->is_default()) Visit(node->label());
+ VisitStatements(node->statements());
+}
+
+
+void AstNumberingVisitor::VisitForStatement(ForStatement* node) {
+ IncrementNodeCount();
+ DisableSelfOptimization();
+ node->set_base_id(ReserveIdRange(ForStatement::num_ids()));
+ if (node->init() != NULL) Visit(node->init());
+ if (node->cond() != NULL) Visit(node->cond());
+ if (node->next() != NULL) Visit(node->next());
+ Visit(node->body());
+}
+
+
+void AstNumberingVisitor::VisitClassLiteral(ClassLiteral* node) {
+ IncrementNodeCount();
+ DisableCrankshaft(kClassLiteral);
+ node->set_base_id(ReserveIdRange(node->num_ids()));
+ if (node->extends()) Visit(node->extends());
+ if (node->constructor()) Visit(node->constructor());
+ if (node->class_variable_proxy()) {
+ VisitVariableProxy(node->class_variable_proxy());
+ }
+ for (int i = 0; i < node->properties()->length(); i++) {
+ VisitObjectLiteralProperty(node->properties()->at(i));
+ }
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitObjectLiteral(ObjectLiteral* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(node->num_ids()));
+ for (int i = 0; i < node->properties()->length(); i++) {
+ VisitObjectLiteralProperty(node->properties()->at(i));
+ }
+ node->BuildConstantProperties(isolate_);
+ // Mark all computed expressions that are bound to a key that
+ // is shadowed by a later occurrence of the same key. For the
+ // marked expressions, no store code will be is emitted.
+ node->CalculateEmitStore(zone_);
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitObjectLiteralProperty(
+ ObjectLiteralProperty* node) {
+ if (node->is_computed_name()) DisableCrankshaft(kComputedPropertyName);
+ Visit(node->key());
+ Visit(node->value());
+}
+
+
+void AstNumberingVisitor::VisitArrayLiteral(ArrayLiteral* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(node->num_ids()));
+ for (int i = 0; i < node->values()->length(); i++) {
+ Visit(node->values()->at(i));
+ }
+ node->BuildConstantElements(isolate_);
+ ReserveFeedbackSlots(node);
+}
+
+
+void AstNumberingVisitor::VisitCall(Call* node) {
+ IncrementNodeCount();
+ ReserveFeedbackSlots(node);
+ node->set_base_id(ReserveIdRange(Call::num_ids()));
+ Visit(node->expression());
+ VisitArguments(node->arguments());
+}
+
+
+void AstNumberingVisitor::VisitCallNew(CallNew* node) {
+ IncrementNodeCount();
+ ReserveFeedbackSlots(node);
+ node->set_base_id(ReserveIdRange(CallNew::num_ids()));
+ Visit(node->expression());
+ VisitArguments(node->arguments());
+}
+
+
+void AstNumberingVisitor::VisitStatements(ZoneList<Statement*>* statements) {
+ if (statements == NULL) return;
+ for (int i = 0; i < statements->length(); i++) {
+ Visit(statements->at(i));
+ }
+}
+
+
+void AstNumberingVisitor::VisitDeclarations(
+ ZoneList<Declaration*>* declarations) {
+ for (int i = 0; i < declarations->length(); i++) {
+ Visit(declarations->at(i));
+ }
+}
+
+
+void AstNumberingVisitor::VisitArguments(ZoneList<Expression*>* arguments) {
+ for (int i = 0; i < arguments->length(); i++) {
+ Visit(arguments->at(i));
+ }
+}
+
+
+void AstNumberingVisitor::VisitFunctionLiteral(FunctionLiteral* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(FunctionLiteral::num_ids()));
+ // We don't recurse into the declarations or body of the function literal:
+ // you have to separately Renumber() each FunctionLiteral that you compile.
+}
+
+
+void AstNumberingVisitor::VisitRewritableAssignmentExpression(
+ RewritableAssignmentExpression* node) {
+ IncrementNodeCount();
+ node->set_base_id(ReserveIdRange(RewritableAssignmentExpression::num_ids()));
+ Visit(node->expression());
+}
+
+
+bool AstNumberingVisitor::Finish(FunctionLiteral* node) {
+ node->set_ast_properties(&properties_);
+ node->set_dont_optimize_reason(dont_optimize_reason());
+ return !HasStackOverflow();
+}
+
+
+bool AstNumberingVisitor::Renumber(FunctionLiteral* node) {
+ Scope* scope = node->scope();
+
+ if (scope->HasIllegalRedeclaration()) {
+ Visit(scope->GetIllegalRedeclaration());
+ DisableOptimization(kFunctionWithIllegalRedeclaration);
+ return Finish(node);
+ }
+ if (scope->new_target_var()) DisableCrankshaft(kSuperReference);
+ if (scope->calls_eval()) DisableOptimization(kFunctionCallsEval);
+ if (scope->arguments() != NULL && !scope->arguments()->IsStackAllocated()) {
+ DisableCrankshaft(kContextAllocatedArguments);
+ }
+
+ int rest_index;
+ if (scope->rest_parameter(&rest_index)) {
+ DisableCrankshaft(kRestParameter);
+ }
+
+ VisitDeclarations(scope->declarations());
+ VisitStatements(node->body());
+
+ return Finish(node);
+}
+
+
+bool AstNumbering::Renumber(Isolate* isolate, Zone* zone,
+ FunctionLiteral* function) {
+ AstNumberingVisitor visitor(isolate, zone);
+ return visitor.Renumber(function);
+}
+} // namespace internal
+} // namespace v8