[es6] Don't use the %GetPrototype runtime entry for super calls.

src/parsing/parser.cc

 // 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/parsing/parser.h"
 
 #include "src/api.h"
 #include "src/ast/ast.h"
 #include "src/ast/ast-expression-visitor.h"
 #include "src/ast/ast-literal-reindexer.h"
@@ skipping 343 matching lines @@
   function_scope->set_end_position(pos);
   ZoneList<Statement*>* body = NULL;
 
   {
     AstNodeFactory function_factory(ast_value_factory());
     FunctionState function_state(&function_state_, &scope_, function_scope,
                                  kind, &function_factory);
 
     body = new (zone()) ZoneList<Statement*>(call_super ? 2 : 1, zone());
     if (call_super) {
-      // %_DefaultConstructorCallSuper(new.target, %GetPrototype(<this-fun>))
+      // let super_constructor = %_GetSuperConstructor(<this-function>)
+      // %_DefaultConstructorCallSuper(new.target, super_constructor)
       ZoneList<Expression*>* args =
           new (zone()) ZoneList<Expression*>(2, zone());
       VariableProxy* new_target_proxy = scope_->NewUnresolved(
           factory(), ast_value_factory()->new_target_string(), Variable::NORMAL,
           pos);
       args->Add(new_target_proxy, zone());
       VariableProxy* this_function_proxy = scope_->NewUnresolved(
           factory(), ast_value_factory()->this_function_string(),
           Variable::NORMAL, pos);
       ZoneList<Expression*>* tmp =
           new (zone()) ZoneList<Expression*>(1, zone());
       tmp->Add(this_function_proxy, zone());
-      Expression* get_prototype =
-          factory()->NewCallRuntime(Runtime::kGetPrototype, tmp, pos);
-      args->Add(get_prototype, zone());
+      Expression* super_constructor = factory()->NewCallRuntime(
+          Runtime::kInlineGetSuperConstructor, tmp, pos);
+      args->Add(super_constructor, zone());
       CallRuntime* call = factory()->NewCallRuntime(
           Runtime::kInlineDefaultConstructorCallSuper, args, pos);
       body->Add(factory()->NewReturnStatement(call, pos), zone());
     }
 
     materialized_literal_count = function_state.materialized_literal_count();
     expected_property_count = function_state.expected_property_count();
   }
 
   FunctionLiteral* function_literal = factory()->NewFunctionLiteral(
@@ skipping 6036 matching lines @@
   }
   UNREACHABLE();
 }
 
 
 Expression* Parser::SpreadCall(Expression* function,
                                ZoneList<v8::internal::Expression*>* args,
                                int pos) {
   if (function->IsSuperCallReference()) {
     // Super calls
-    // %reflect_construct(%GetPrototype(<this-function>), args, new.target))
+    // let super_constructor = %_GetSuperConstructor(<this-function>)
+    // %reflect_construct(super_constructor, args, new.target)
     ZoneList<Expression*>* tmp = new (zone()) ZoneList<Expression*>(1, zone());
     tmp->Add(function->AsSuperCallReference()->this_function_var(), zone());
-    Expression* get_prototype =
-        factory()->NewCallRuntime(Runtime::kGetPrototype, tmp, pos);
-    args->InsertAt(0, get_prototype, zone());
+    Expression* super_constructor = factory()->NewCallRuntime(
+        Runtime::kInlineGetSuperConstructor, tmp, pos);
+    args->InsertAt(0, super_constructor, zone());
     args->Add(function->AsSuperCallReference()->new_target_var(), zone());
     return factory()->NewCallRuntime(Context::REFLECT_CONSTRUCT_INDEX, args,
                                      pos);
   } else {
     if (function->IsProperty()) {
       // Method calls
       if (function->AsProperty()->IsSuperAccess()) {
         Expression* home =
             ThisExpression(scope_, factory(), RelocInfo::kNoPosition);
         args->InsertAt(0, function, zone());
@@ skipping 82 matching lines @@
 
 void ParserTraits::QueueDestructuringAssignmentForRewriting(Expression* expr) {
   DCHECK(expr->IsRewritableAssignmentExpression());
   parser_->function_state_->AddDestructuringAssignment(
       Parser::DestructuringAssignment(expr, parser_->scope_));
 }
 
 
 }  // namespace internal
 }  // namespace v8