Call JS functions via native context instead of js builtins object.

src/pattern-rewriter.cc

 // 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.
 
 #include "src/ast.h"
 #include "src/messages.h"
 #include "src/parser.h"
 
 namespace v8 {
 
@@ skipping 124 matching lines @@
     CallRuntime* initialize;
 
     if (descriptor_->is_const) {
       arguments->Add(value, zone());
       value = NULL;  // zap the value to avoid the unnecessary assignment
 
       // Construct the call to Runtime_InitializeConstGlobal
       // and add it to the initialization statement block.
       // Note that the function does different things depending on
       // the number of arguments (1 or 2).
-      initialize = factory()->NewCallRuntime(
-          ast_value_factory()->initialize_const_global_string(),
-          Runtime::FunctionForId(Runtime::kInitializeConstGlobal), arguments,
-          descriptor_->initialization_pos);
+      initialize =
+          factory()->NewCallRuntime(Runtime::kInitializeConstGlobal, arguments,
+                                    descriptor_->initialization_pos);
     } else {
       // Add language mode.
       // We may want to pass singleton to avoid Literal allocations.
       LanguageMode language_mode = initialization_scope->language_mode();
       arguments->Add(factory()->NewNumberLiteral(language_mode,
                                                  descriptor_->declaration_pos),
                      zone());
 
       // Be careful not to assign a value to the global variable if
       // we're in a with. The initialization value should not
       // necessarily be stored in the global object in that case,
       // which is why we need to generate a separate assignment node.
       if (value != NULL && !inside_with()) {
         arguments->Add(value, zone());
         value = NULL;  // zap the value to avoid the unnecessary assignment
         // Construct the call to Runtime_InitializeVarGlobal
         // and add it to the initialization statement block.
-        initialize = factory()->NewCallRuntime(
-            ast_value_factory()->initialize_var_global_string(),
-            Runtime::FunctionForId(Runtime::kInitializeVarGlobal), arguments,
-            descriptor_->declaration_pos);
+        initialize =
+            factory()->NewCallRuntime(Runtime::kInitializeVarGlobal, arguments,
+                                      descriptor_->declaration_pos);
       } else {
         initialize = NULL;
       }
     }
 
     if (initialize != NULL) {
       block_->AddStatement(
           factory()->NewExpressionStatement(initialize, RelocInfo::kNoPosition),
           zone());
     }
@@ skipping 125 matching lines @@
         RelocInfo::kNoPosition);
     block_->AddStatement(if_statement, zone());
 
     if (!(value->IsLiteral() && value->AsLiteral()->raw_value()->IsTheHole())) {
       RecurseIntoSubpattern(value, factory()->NewVariableProxy(v));
     }
   }
 
   if (spread != nullptr) {
     // array = [];
-    // if (!done) $concatIterableToArray(array, iterator);
+    // if (!done) %concat_iterable_to_array(array, iterator);
     auto empty_exprs = new (zone()) ZoneList<Expression*>(0, zone());
     auto array = CreateTempVar(factory()->NewArrayLiteral(
         empty_exprs,
         // Reuse pattern's literal index - it is unused since there is no
         // actual literal allocated.
         node->literal_index(), is_strong(descriptor_->parser->language_mode()),
         RelocInfo::kNoPosition));
 
     auto arguments = new (zone()) ZoneList<Expression*>(2, zone());
     arguments->Add(factory()->NewVariableProxy(array), zone());
     arguments->Add(factory()->NewVariableProxy(iterator), zone());
-    auto spread_into_array_call = factory()->NewCallRuntime(
-        ast_value_factory()->concat_iterable_to_array_string(), nullptr,
-        arguments, RelocInfo::kNoPosition);
+    auto spread_into_array_call =
+        factory()->NewCallRuntime(Context::CONCAT_ITERABLE_TO_ARRAY_INDEX,
+                                  arguments, RelocInfo::kNoPosition);
 
     auto if_statement = factory()->NewIfStatement(
         factory()->NewUnaryOperation(Token::NOT,
                                      factory()->NewVariableProxy(done),
                                      RelocInfo::kNoPosition),
         factory()->NewExpressionStatement(spread_into_array_call,
                                           RelocInfo::kNoPosition),
         factory()->NewEmptyStatement(RelocInfo::kNoPosition),
         RelocInfo::kNoPosition);
     block_->AddStatement(if_statement, zone());
@@ skipping 80 matching lines @@
 NOT_A_PATTERN(TryFinallyStatement)
 NOT_A_PATTERN(UnaryOperation)
 NOT_A_PATTERN(VariableDeclaration)
 NOT_A_PATTERN(WhileStatement)
 NOT_A_PATTERN(WithStatement)
 NOT_A_PATTERN(Yield)
 
 #undef NOT_A_PATTERN
 }  // namespace internal
 }  // namespace v8