deps: upgrade V8 to 4.6.85.25

Move up to the latest patch level from the V8 4.6 branch:
https://github.com/v8/v8/compare/4.6.85.23...4.6.85.25

PR-URL: https://github.com/nodejs/node/pull/3351
Reviewed-By: indutny - Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 4
 #define V8_MINOR_VERSION 6
 #define V8_BUILD_NUMBER 85
-#define V8_PATCH_LEVEL 23
+#define V8_PATCH_LEVEL 25
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

deps/v8/src/ast.h

@@ -3271,14 +3271,15 @@ class AstVisitor BASE_EMBEDDED {
 class AstNodeFactory final BASE_EMBEDDED {
  public:
   explicit AstNodeFactory(AstValueFactory* ast_value_factory)
-      : zone_(ast_value_factory->zone()),
+      : local_zone_(ast_value_factory->zone()),
+        parser_zone_(ast_value_factory->zone()),
         ast_value_factory_(ast_value_factory) {}
 
   VariableDeclaration* NewVariableDeclaration(
       VariableProxy* proxy, VariableMode mode, Scope* scope, int pos,
       bool is_class_declaration = false, int declaration_group_start = -1) {
-    return new (zone_)
-        VariableDeclaration(zone_, proxy, mode, scope, pos,
+    return new (parser_zone_)
+        VariableDeclaration(parser_zone_, proxy, mode, scope, pos,
                             is_class_declaration, declaration_group_start);
   }
 
@@ -3287,32 +3288,34 @@ class AstNodeFactory final BASE_EMBEDDED {
                                               FunctionLiteral* fun,
                                               Scope* scope,
                                               int pos) {
-    return new (zone_) FunctionDeclaration(zone_, proxy, mode, fun, scope, pos);
+    return new (parser_zone_)
+        FunctionDeclaration(parser_zone_, proxy, mode, fun, scope, pos);
   }
 
   ImportDeclaration* NewImportDeclaration(VariableProxy* proxy,
                                           const AstRawString* import_name,
                                           const AstRawString* module_specifier,
                                           Scope* scope, int pos) {
-    return new (zone_) ImportDeclaration(zone_, proxy, import_name,
-                                         module_specifier, scope, pos);
+    return new (parser_zone_) ImportDeclaration(
+        parser_zone_, proxy, import_name, module_specifier, scope, pos);
   }
 
   ExportDeclaration* NewExportDeclaration(VariableProxy* proxy,
                                           Scope* scope,
                                           int pos) {
-    return new (zone_) ExportDeclaration(zone_, proxy, scope, pos);
+    return new (parser_zone_)
+        ExportDeclaration(parser_zone_, proxy, scope, pos);
   }
 
   Block* NewBlock(ZoneList<const AstRawString*>* labels, int capacity,
                   bool ignore_completion_value, int pos) {
-    return new (zone_)
-        Block(zone_, labels, capacity, ignore_completion_value, pos);
+    return new (local_zone_)
+        Block(local_zone_, labels, capacity, ignore_completion_value, pos);
   }
 
 #define STATEMENT_WITH_LABELS(NodeType)                                     \
   NodeType* New##NodeType(ZoneList<const AstRawString*>* labels, int pos) { \
-    return new (zone_) NodeType(zone_, labels, pos);                        \
+    return new (local_zone_) NodeType(local_zone_, labels, pos);            \
   }
   STATEMENT_WITH_LABELS(DoWhileStatement)
   STATEMENT_WITH_LABELS(WhileStatement)
@@ -3325,10 +3328,10 @@ class AstNodeFactory final BASE_EMBEDDED {
                                         int pos) {
     switch (visit_mode) {
       case ForEachStatement::ENUMERATE: {
-        return new (zone_) ForInStatement(zone_, labels, pos);
+        return new (local_zone_) ForInStatement(local_zone_, labels, pos);
       }
       case ForEachStatement::ITERATE: {
-        return new (zone_) ForOfStatement(zone_, labels, pos);
+        return new (local_zone_) ForOfStatement(local_zone_, labels, pos);
       }
     }
     UNREACHABLE();
@@ -3336,95 +3339,102 @@ class AstNodeFactory final BASE_EMBEDDED {
   }
 
   ExpressionStatement* NewExpressionStatement(Expression* expression, int pos) {
-    return new (zone_) ExpressionStatement(zone_, expression, pos);
+    return new (local_zone_) ExpressionStatement(local_zone_, expression, pos);
   }
 
   ContinueStatement* NewContinueStatement(IterationStatement* target, int pos) {
-    return new (zone_) ContinueStatement(zone_, target, pos);
+    return new (local_zone_) ContinueStatement(local_zone_, target, pos);
   }
 
   BreakStatement* NewBreakStatement(BreakableStatement* target, int pos) {
-    return new (zone_) BreakStatement(zone_, target, pos);
+    return new (local_zone_) BreakStatement(local_zone_, target, pos);
   }
 
   ReturnStatement* NewReturnStatement(Expression* expression, int pos) {
-    return new (zone_) ReturnStatement(zone_, expression, pos);
+    return new (local_zone_) ReturnStatement(local_zone_, expression, pos);
   }
 
   WithStatement* NewWithStatement(Scope* scope,
                                   Expression* expression,
                                   Statement* statement,
                                   int pos) {
-    return new (zone_) WithStatement(zone_, scope, expression, statement, pos);
+    return new (local_zone_)
+        WithStatement(local_zone_, scope, expression, statement, pos);
   }
 
   IfStatement* NewIfStatement(Expression* condition,
                               Statement* then_statement,
                               Statement* else_statement,
                               int pos) {
-    return new (zone_)
-        IfStatement(zone_, condition, then_statement, else_statement, pos);
+    return new (local_zone_) IfStatement(local_zone_, condition, then_statement,
+                                         else_statement, pos);
   }
 
   TryCatchStatement* NewTryCatchStatement(Block* try_block, Scope* scope,
                                           Variable* variable,
                                           Block* catch_block, int pos) {
-    return new (zone_)
-        TryCatchStatement(zone_, try_block, scope, variable, catch_block, pos);
+    return new (local_zone_) TryCatchStatement(local_zone_, try_block, scope,
+                                               variable, catch_block, pos);
   }
 
   TryFinallyStatement* NewTryFinallyStatement(Block* try_block,
                                               Block* finally_block, int pos) {
-    return new (zone_)
-        TryFinallyStatement(zone_, try_block, finally_block, pos);
+    return new (local_zone_)
+        TryFinallyStatement(local_zone_, try_block, finally_block, pos);
   }
 
   DebuggerStatement* NewDebuggerStatement(int pos) {
-    return new (zone_) DebuggerStatement(zone_, pos);
+    return new (local_zone_) DebuggerStatement(local_zone_, pos);
   }
 
   EmptyStatement* NewEmptyStatement(int pos) {
-    return new(zone_) EmptyStatement(zone_, pos);
+    return new (local_zone_) EmptyStatement(local_zone_, pos);
   }
 
   CaseClause* NewCaseClause(
       Expression* label, ZoneList<Statement*>* statements, int pos) {
-    return new (zone_) CaseClause(zone_, label, statements, pos);
+    return new (local_zone_) CaseClause(local_zone_, label, statements, pos);
   }
 
   Literal* NewStringLiteral(const AstRawString* string, int pos) {
-    return new (zone_)
-        Literal(zone_, ast_value_factory_->NewString(string), pos);
+    return new (local_zone_)
+        Literal(local_zone_, ast_value_factory_->NewString(string), pos);
   }
 
   // A JavaScript symbol (ECMA-262 edition 6).
   Literal* NewSymbolLiteral(const char* name, int pos) {
-    return new (zone_) Literal(zone_, ast_value_factory_->NewSymbol(name), pos);
+    return new (local_zone_)
+        Literal(local_zone_, ast_value_factory_->NewSymbol(name), pos);
   }
 
   Literal* NewNumberLiteral(double number, int pos, bool with_dot = false) {
-    return new (zone_)
-        Literal(zone_, ast_value_factory_->NewNumber(number, with_dot), pos);
+    return new (local_zone_) Literal(
+        local_zone_, ast_value_factory_->NewNumber(number, with_dot), pos);
   }
 
   Literal* NewSmiLiteral(int number, int pos) {
-    return new (zone_) Literal(zone_, ast_value_factory_->NewSmi(number), pos);
+    return new (local_zone_)
+        Literal(local_zone_, ast_value_factory_->NewSmi(number), pos);
   }
 
   Literal* NewBooleanLiteral(bool b, int pos) {
-    return new (zone_) Literal(zone_, ast_value_factory_->NewBoolean(b), pos);
+    return new (local_zone_)
+        Literal(local_zone_, ast_value_factory_->NewBoolean(b), pos);
   }
 
   Literal* NewNullLiteral(int pos) {
-    return new (zone_) Literal(zone_, ast_value_factory_->NewNull(), pos);
+    return new (local_zone_)
+        Literal(local_zone_, ast_value_factory_->NewNull(), pos);
   }
 
   Literal* NewUndefinedLiteral(int pos) {
-    return new (zone_) Literal(zone_, ast_value_factory_->NewUndefined(), pos);
+    return new (local_zone_)
+        Literal(local_zone_, ast_value_factory_->NewUndefined(), pos);
   }
 
   Literal* NewTheHoleLiteral(int pos) {
-    return new (zone_) Literal(zone_, ast_value_factory_->NewTheHole(), pos);
+    return new (local_zone_)
+        Literal(local_zone_, ast_value_factory_->NewTheHole(), pos);
   }
 
   ObjectLiteral* NewObjectLiteral(
@@ -3434,15 +3444,15 @@ class AstNodeFactory final BASE_EMBEDDED {
       bool has_function,
       bool is_strong,
       int pos) {
-    return new (zone_) ObjectLiteral(zone_, properties, literal_index,
-                                     boilerplate_properties, has_function,
-                                     is_strong, pos);
+    return new (local_zone_)
+        ObjectLiteral(local_zone_, properties, literal_index,
+                      boilerplate_properties, has_function, is_strong, pos);
   }
 
   ObjectLiteral::Property* NewObjectLiteralProperty(
       Expression* key, Expression* value, ObjectLiteralProperty::Kind kind,
       bool is_static, bool is_computed_name) {
-    return new (zone_)
+    return new (local_zone_)
         ObjectLiteral::Property(key, value, kind, is_static, is_computed_name);
   }
 
@@ -3450,8 +3460,8 @@ class AstNodeFactory final BASE_EMBEDDED {
                                                     Expression* value,
                                                     bool is_static,
                                                     bool is_computed_name) {
-    return new (zone_) ObjectLiteral::Property(ast_value_factory_, key, value,
-                                               is_static, is_computed_name);
+    return new (local_zone_) ObjectLiteral::Property(
+        ast_value_factory_, key, value, is_static, is_computed_name);
   }
 
   RegExpLiteral* NewRegExpLiteral(const AstRawString* pattern,
@@ -3459,29 +3469,30 @@ class AstNodeFactory final BASE_EMBEDDED {
                                   int literal_index,
                                   bool is_strong,
                                   int pos) {
-    return new (zone_) RegExpLiteral(zone_, pattern, flags, literal_index,
-                                     is_strong, pos);
+    return new (local_zone_) RegExpLiteral(local_zone_, pattern, flags,
+                                           literal_index, is_strong, pos);
   }
 
   ArrayLiteral* NewArrayLiteral(ZoneList<Expression*>* values,
                                 int literal_index,
                                 bool is_strong,
                                 int pos) {
-    return new (zone_)
-        ArrayLiteral(zone_, values, -1, literal_index, is_strong, pos);
+    return new (local_zone_)
+        ArrayLiteral(local_zone_, values, -1, literal_index, is_strong, pos);
   }
 
   ArrayLiteral* NewArrayLiteral(ZoneList<Expression*>* values,
                                 int first_spread_index, int literal_index,
                                 bool is_strong, int pos) {
-    return new (zone_) ArrayLiteral(zone_, values, first_spread_index,
-                                    literal_index, is_strong, pos);
+    return new (local_zone_) ArrayLiteral(
+        local_zone_, values, first_spread_index, literal_index, is_strong, pos);
   }
 
   VariableProxy* NewVariableProxy(Variable* var,
                                   int start_position = RelocInfo::kNoPosition,
                                   int end_position = RelocInfo::kNoPosition) {
-    return new (zone_) VariableProxy(zone_, var, start_position, end_position);
+    return new (parser_zone_)
+        VariableProxy(parser_zone_, var, start_position, end_position);
   }
 
   VariableProxy* NewVariableProxy(const AstRawString* name,
@@ -3489,70 +3500,73 @@ class AstNodeFactory final BASE_EMBEDDED {
                                   int start_position = RelocInfo::kNoPosition,
                                   int end_position = RelocInfo::kNoPosition) {
     DCHECK_NOT_NULL(name);
-    return new (zone_)
-        VariableProxy(zone_, name, variable_kind, start_position, end_position);
+    return new (parser_zone_) VariableProxy(parser_zone_, name, variable_kind,
+                                            start_position, end_position);
   }
 
   Property* NewProperty(Expression* obj, Expression* key, int pos) {
-    return new (zone_) Property(zone_, obj, key, pos);
+    return new (local_zone_) Property(local_zone_, obj, key, pos);
   }
 
   Call* NewCall(Expression* expression,
                 ZoneList<Expression*>* arguments,
                 int pos) {
-    return new (zone_) Call(zone_, expression, arguments, pos);
+    return new (local_zone_) Call(local_zone_, expression, arguments, pos);
   }
 
   CallNew* NewCallNew(Expression* expression,
                       ZoneList<Expression*>* arguments,
                       int pos) {
-    return new (zone_) CallNew(zone_, expression, arguments, pos);
+    return new (local_zone_) CallNew(local_zone_, expression, arguments, pos);
   }
 
   CallRuntime* NewCallRuntime(const AstRawString* name,
                               const Runtime::Function* function,
                               ZoneList<Expression*>* arguments,
                               int pos) {
-    return new (zone_) CallRuntime(zone_, name, function, arguments, pos);
+    return new (local_zone_)
+        CallRuntime(local_zone_, name, function, arguments, pos);
   }
 
   UnaryOperation* NewUnaryOperation(Token::Value op,
                                     Expression* expression,
                                     int pos) {
-    return new (zone_) UnaryOperation(zone_, op, expression, pos);
+    return new (local_zone_) UnaryOperation(local_zone_, op, expression, pos);
   }
 
   BinaryOperation* NewBinaryOperation(Token::Value op,
                                       Expression* left,
                                       Expression* right,
                                       int pos) {
-    return new (zone_) BinaryOperation(zone_, op, left, right, pos);
+    return new (local_zone_) BinaryOperation(local_zone_, op, left, right, pos);
   }
 
   CountOperation* NewCountOperation(Token::Value op,
                                     bool is_prefix,
                                     Expression* expr,
                                     int pos) {
-    return new (zone_) CountOperation(zone_, op, is_prefix, expr, pos);
+    return new (local_zone_)
+        CountOperation(local_zone_, op, is_prefix, expr, pos);
   }
 
   CompareOperation* NewCompareOperation(Token::Value op,
                                         Expression* left,
                                         Expression* right,
                                         int pos) {
-    return new (zone_) CompareOperation(zone_, op, left, right, pos);
+    return new (local_zone_)
+        CompareOperation(local_zone_, op, left, right, pos);
   }
 
   Spread* NewSpread(Expression* expression, int pos) {
-    return new (zone_) Spread(zone_, expression, pos);
+    return new (local_zone_) Spread(local_zone_, expression, pos);
   }
 
   Conditional* NewConditional(Expression* condition,
                               Expression* then_expression,
                               Expression* else_expression,
                               int position) {
-    return new (zone_) Conditional(zone_, condition, then_expression,
-                                   else_expression, position);
+    return new (local_zone_) Conditional(
+        local_zone_, condition, then_expression, else_expression, position);
   }
 
   Assignment* NewAssignment(Token::Value op,
@@ -3560,7 +3574,8 @@ class AstNodeFactory final BASE_EMBEDDED {
                             Expression* value,
                             int pos) {
     DCHECK(Token::IsAssignmentOp(op));
-    Assignment* assign = new (zone_) Assignment(zone_, op, target, value, pos);
+    Assignment* assign =
+        new (local_zone_) Assignment(local_zone_, op, target, value, pos);
     if (assign->is_compound()) {
       DCHECK(Token::IsAssignmentOp(op));
       assign->binary_operation_ =
@@ -3574,12 +3589,12 @@ class AstNodeFactory final BASE_EMBEDDED {
                   Yield::Kind yield_kind,
                   int pos) {
     if (!expression) expression = NewUndefinedLiteral(pos);
-    return new (zone_)
-        Yield(zone_, generator_object, expression, yield_kind, pos);
+    return new (local_zone_)
+        Yield(local_zone_, generator_object, expression, yield_kind, pos);
   }
 
   Throw* NewThrow(Expression* exception, int pos) {
-    return new (zone_) Throw(zone_, exception, pos);
+    return new (local_zone_) Throw(local_zone_, exception, pos);
   }
 
   FunctionLiteral* NewFunctionLiteral(
@@ -3591,11 +3606,11 @@ class AstNodeFactory final BASE_EMBEDDED {
       FunctionLiteral::IsFunctionFlag is_function,
       FunctionLiteral::EagerCompileHint eager_compile_hint, FunctionKind kind,
       int position) {
-    return new (zone_) FunctionLiteral(
-        zone_, name, ast_value_factory, scope, body, materialized_literal_count,
-        expected_property_count, parameter_count, function_type,
-        has_duplicate_parameters, is_function, eager_compile_hint, kind,
-        position);
+    return new (parser_zone_) FunctionLiteral(
+        parser_zone_, name, ast_value_factory, scope, body,
+        materialized_literal_count, expected_property_count, parameter_count,
+        function_type, has_duplicate_parameters, is_function,
+        eager_compile_hint, kind, position);
   }
 
   ClassLiteral* NewClassLiteral(const AstRawString* name, Scope* scope,
@@ -3603,38 +3618,65 @@ class AstNodeFactory final BASE_EMBEDDED {
                                 FunctionLiteral* constructor,
                                 ZoneList<ObjectLiteral::Property*>* properties,
                                 int start_position, int end_position) {
-    return new (zone_)
-        ClassLiteral(zone_, name, scope, proxy, extends, constructor,
+    return new (parser_zone_)
+        ClassLiteral(parser_zone_, name, scope, proxy, extends, constructor,
                      properties, start_position, end_position);
   }
 
   NativeFunctionLiteral* NewNativeFunctionLiteral(const AstRawString* name,
                                                   v8::Extension* extension,
                                                   int pos) {
-    return new (zone_) NativeFunctionLiteral(zone_, name, extension, pos);
+    return new (parser_zone_)
+        NativeFunctionLiteral(parser_zone_, name, extension, pos);
   }
 
   ThisFunction* NewThisFunction(int pos) {
-    return new (zone_) ThisFunction(zone_, pos);
+    return new (local_zone_) ThisFunction(local_zone_, pos);
   }
 
   SuperPropertyReference* NewSuperPropertyReference(VariableProxy* this_var,
                                                     Expression* home_object,
                                                     int pos) {
-    return new (zone_)
-        SuperPropertyReference(zone_, this_var, home_object, pos);
+    return new (parser_zone_)
+        SuperPropertyReference(parser_zone_, this_var, home_object, pos);
   }
 
   SuperCallReference* NewSuperCallReference(VariableProxy* this_var,
                                             VariableProxy* new_target_var,
                                             VariableProxy* this_function_var,
                                             int pos) {
-    return new (zone_) SuperCallReference(zone_, this_var, new_target_var,
-                                          this_function_var, pos);
+    return new (parser_zone_) SuperCallReference(
+        parser_zone_, this_var, new_target_var, this_function_var, pos);
   }
 
+  Zone* zone() const { return local_zone_; }
+
+  // Handles use of temporary zones when parsing inner function bodies.
+  class BodyScope {
+   public:
+    BodyScope(AstNodeFactory* factory, Zone* temp_zone, bool use_temp_zone)
+        : factory_(factory), prev_zone_(factory->local_zone_) {
+      if (use_temp_zone) {
+        factory->local_zone_ = temp_zone;
+      }
+    }
+
+    ~BodyScope() { factory_->local_zone_ = prev_zone_; }
+
+   private:
+    AstNodeFactory* factory_;
+    Zone* prev_zone_;
+  };
+
  private:
-  Zone* zone_;
+  // This zone may be deallocated upon returning from parsing a function body
+  // which we can guarantee is not going to be compiled or have its AST
+  // inspected.
+  // See ParseFunctionLiteral in parser.cc for preconditions.
+  Zone* local_zone_;
+  // ZoneObjects which need to persist until scope analysis must be allocated in
+  // the parser-level zone.
+  Zone* parser_zone_;
   AstValueFactory* ast_value_factory_;
 };
 

deps/v8/src/parser.cc

@@ -4135,10 +4135,44 @@ FunctionLiteral* Parser::ParseFunctionLiteral(
       }
     }
     if (!is_lazily_parsed) {
-      body = ParseEagerFunctionBody(function_name, pos, formals, kind,
-                                    function_type, CHECK_OK);
+      // Determine whether the function body can be discarded after parsing.
+      // The preconditions are:
+      // - Lazy compilation has to be enabled.
+      // - Neither V8 natives nor native function declarations can be allowed,
+      //   since parsing one would retroactively force the function to be
+      //   eagerly compiled.
+      // - The invoker of this parser can't depend on the AST being eagerly
+      //   built (either because the function is about to be compiled, or
+      //   because the AST is going to be inspected for some reason).
+      // - Because of the above, we can't be attempting to parse a
+      //   FunctionExpression; even without enclosing parentheses it might be
+      //   immediately invoked.
+      // - The function literal shouldn't be hinted to eagerly compile.
+      bool use_temp_zone =
+          FLAG_lazy && !allow_natives() && extension_ == NULL && allow_lazy() &&
+          function_type == FunctionLiteral::DECLARATION &&
+          eager_compile_hint != FunctionLiteral::kShouldEagerCompile;
+      // Open a new BodyScope, which sets our AstNodeFactory to allocate in the
+      // new temporary zone if the preconditions are satisfied, and ensures that
+      // the previous zone is always restored after parsing the body.
+      // For the purpose of scope analysis, some ZoneObjects allocated by the
+      // factory must persist after the function body is thrown away and
+      // temp_zone is deallocated. These objects are instead allocated in a
+      // parser-persistent zone (see parser_zone_ in AstNodeFactory).
+      {
+        Zone temp_zone;
+        AstNodeFactory::BodyScope inner(factory(), &temp_zone, use_temp_zone);
+
+        body = ParseEagerFunctionBody(function_name, pos, formals, kind,
+                                      function_type, CHECK_OK);
+      }
       materialized_literal_count = function_state.materialized_literal_count();
       expected_property_count = function_state.expected_property_count();
+      if (use_temp_zone) {
+        // If the preconditions are correct the function body should never be
+        // accessed, but do this anyway for better behaviour if they're wrong.
+        body = NULL;
+      }
     }
 
     // Parsing the body may change the language mode in our scope.

deps/v8/test/cctest/test-parsing.cc

@@ -1388,6 +1388,68 @@ TEST(ScopePositions) {
 }
 
 
+TEST(DiscardFunctionBody) {
+  // Test that inner function bodies are discarded if possible.
+  // See comments in ParseFunctionLiteral in parser.cc.
+  const char* discard_sources[] = {
+      "(function f() { function g() { var a; } })();",
+      /* TODO(conradw): In future it may be possible to apply this optimisation
+       * to these productions.
+      "(function f() { 0, function g() { var a; } })();",
+      "(function f() { 0, { g() { var a; } } })();",
+      "(function f() { 0, class c { g() { var a; } } })();", */
+      NULL
+  };
+
+  i::Isolate* isolate = CcTest::i_isolate();
+  i::Factory* factory = isolate->factory();
+  v8::HandleScope handles(CcTest::isolate());
+  i::FunctionLiteral* function;
+
+  for (int i = 0; discard_sources[i]; i++) {
+    const char* source = discard_sources[i];
+    i::Handle<i::String> source_code =
+        factory->NewStringFromUtf8(i::CStrVector(source)).ToHandleChecked();
+    i::Handle<i::Script> script = factory->NewScript(source_code);
+    i::Zone zone;
+    i::ParseInfo info(&zone, script);
+    info.set_allow_lazy_parsing();
+    i::Parser parser(&info);
+    parser.set_allow_harmony_sloppy(true);
+    parser.Parse(&info);
+    function = info.literal();
+    CHECK_NOT_NULL(function);
+    CHECK_NOT_NULL(function->body());
+    CHECK_EQ(1, function->body()->length());
+    i::FunctionLiteral* inner =
+        function->body()->first()->AsExpressionStatement()->expression()->
+        AsCall()->expression()->AsFunctionLiteral();
+    i::Scope* inner_scope = inner->scope();
+    i::FunctionLiteral* fun = nullptr;
+    if (inner_scope->declarations()->length() > 1) {
+      fun = inner_scope->declarations()->at(1)->AsFunctionDeclaration()->fun();
+    } else {
+      // TODO(conradw): This path won't be hit until the other test cases can be
+      // uncommented.
+      CHECK_NOT_NULL(inner->body());
+      CHECK_GE(2, inner->body()->length());
+      i::Expression* exp = inner->body()->at(1)->AsExpressionStatement()->
+                           expression()->AsBinaryOperation()->right();
+      if (exp->IsFunctionLiteral()) {
+        fun = exp->AsFunctionLiteral();
+      } else if (exp->IsObjectLiteral()) {
+        fun = exp->AsObjectLiteral()->properties()->at(0)->value()->
+              AsFunctionLiteral();
+      } else {
+        fun = exp->AsClassLiteral()->properties()->at(0)->value()->
+              AsFunctionLiteral();
+      }
+    }
+    CHECK_NULL(fun->body());
+  }
+}
+
+
 const char* ReadString(unsigned* start) {
   int length = start[0];
   char* result = i::NewArray<char>(length + 1);

deps/v8/test/mjsunit/compiler/lazy-iife-no-parens.js

@@ -0,0 +1,43 @@
+// Copyright 2015 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.
+
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+// comments to trigger lazy compilation comments to trigger lazy compilation
+
+// Test that IIFEs are compilable even under lazy conditions where the enclosing
+// parentheses heuristic has not been triggered.
+
+function f() {
+  return function(){ return 0; }();
+}
+
+function g() {
+  function h() {
+    return function(){ return 0; }();
+  }
+  return h();
+}
+
+f();
+
+g();
+
+0, function(){}();
+
+(function(){ 0, function(){}(); })();
+
+0, function(){ (function(){ 0, function(){}(); })(); }();

deps/v8/tools/run-tests.py

@@ -52,13 +52,6 @@ from testrunner.objects import context
 
 
 ARCH_GUESS = utils.DefaultArch()
-DEFAULT_TESTS = [
-  "mjsunit",
-  "unittests",
-  "cctest",
-  "message",
-  "preparser",
-]
 
 # Map of test name synonyms to lists of test suites. Should be ordered by
 # expected runtimes (suites with slow test cases first). These groups are
@@ -69,11 +62,14 @@ TEST_MAP = {
     "cctest",
     "message",
     "preparser",
+    "intl",
+    "unittests",
   ],
   "optimize_for_size": [
     "mjsunit",
     "cctest",
     "webkit",
+    "intl",
   ],
   "unittests": [
     "unittests",
@@ -146,6 +142,7 @@ SUPPORTED_ARCHS = ["android_arm",
                    "x87",
                    "mips",
                    "mipsel",
+                   "mips64",
                    "mips64el",
                    "nacl_ia32",
                    "nacl_x64",
@@ -162,6 +159,7 @@ SLOW_ARCHS = ["android_arm",
               "arm",
               "mips",
               "mipsel",
+              "mips64",
               "mips64el",
               "nacl_ia32",
               "nacl_x64",
@@ -171,9 +169,11 @@ SLOW_ARCHS = ["android_arm",
 
 def BuildOptions():
   result = optparse.OptionParser()
+  result.usage = '%prog [options] [tests]'
+  result.description = """TESTS: %s""" % (TEST_MAP["default"])
   result.add_option("--arch",
                     help=("The architecture to run tests for, "
-                          "'auto' or 'native' for auto-detect"),
+                          "'auto' or 'native' for auto-detect: %s" % SUPPORTED_ARCHS),
                     default="ia32,x64,arm")
   result.add_option("--arch-and-mode",
                     help="Architecture and mode in the format 'arch.mode'",
@@ -220,7 +220,8 @@ def BuildOptions():
   result.add_option("-j", help="The number of parallel tasks to run",
                     default=0, type="int")
   result.add_option("-m", "--mode",
-                    help="The test modes in which to run (comma-separated)",
+                    help="The test modes in which to run (comma-separated,"
+                    " uppercase for ninja and buildbot builds): %s" % MODES.keys(),
                     default="release,debug")
   result.add_option("--no-harness", "--noharness",
                     help="Run without test harness of a given suite",
@@ -248,7 +249,7 @@ def BuildOptions():
                     help="Don't run any testing variants",
                     default=False, dest="no_variants", action="store_true")
   result.add_option("--variants",
-                    help="Comma-separated list of testing variants")
+                    help="Comma-separated list of testing variants: %s" % VARIANTS)
   result.add_option("--outdir", help="Base directory with compile output",
                     default="out")
   result.add_option("--predictable",
@@ -452,8 +453,8 @@ def ProcessOptions(options):
     return False
   if not CheckTestMode("pass|fail test", options.pass_fail_tests):
     return False
-  if not options.no_i18n:
-    DEFAULT_TESTS.append("intl")
+  if options.no_i18n:
+    TEST_MAP["default"].remove("intl")
   return True
 
 
@@ -489,6 +490,10 @@ def Main():
 
   suite_paths = utils.GetSuitePaths(join(workspace, "test"))
 
+  # Use default tests if no test configuration was provided at the cmd line.
+  if len(args) == 0:
+    args = ["default"]
+
   # Expand arguments with grouped tests. The args should reflect the list of
   # suites as otherwise filters would break.
   def ExpandTestGroups(name):
@@ -500,13 +505,10 @@ def Main():
          [ExpandTestGroups(arg) for arg in args],
          [])
 
-  if len(args) == 0:
-    suite_paths = [ s for s in DEFAULT_TESTS if s in suite_paths ]
-  else:
-    args_suites = OrderedDict() # Used as set
-    for arg in args:
-      args_suites[arg.split('/')[0]] = True
-    suite_paths = [ s for s in args_suites if s in suite_paths ]
+  args_suites = OrderedDict() # Used as set
+  for arg in args:
+    args_suites[arg.split('/')[0]] = True
+  suite_paths = [ s for s in args_suites if s in suite_paths ]
 
   suites = []
   for root in suite_paths:
@@ -548,6 +550,8 @@ def Execute(arch, mode, args, options, suites, workspace):
           "%s.%s" % (arch, MODES[mode]["output_folder"]),
       )
   shell_dir = os.path.relpath(shell_dir)
+  if not os.path.exists(shell_dir):
+      raise Exception('Could not find shell_dir: "%s"' % shell_dir)
 
   # Populate context object.
   mode_flags = MODES[mode]["flags"]
@@ -586,7 +590,7 @@ def Execute(arch, mode, args, options, suites, workspace):
 
   # TODO(all): Combine "simulator" and "simulator_run".
   simulator_run = not options.dont_skip_simulator_slow_tests and \
-      arch in ['arm64', 'arm', 'mipsel', 'mips', 'mips64el', \
+      arch in ['arm64', 'arm', 'mipsel', 'mips', 'mips64', 'mips64el', \
                'ppc', 'ppc64'] and \
       ARCH_GUESS and arch != ARCH_GUESS
   # Find available test suites and read test cases from them.
@@ -606,6 +610,7 @@ def Execute(arch, mode, args, options, suites, workspace):
     "msan": options.msan,
     "dcheck_always_on": options.dcheck_always_on,
     "novfp3": options.novfp3,
+    "predictable": options.predictable,
     "byteorder": sys.byteorder,
   }
   all_tests = []