[es6] Perform the IsConstructor test in GetSuperConstructor.

src/interpreter/bytecode-generator.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/interpreter/bytecode-generator.h"
 
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/code-stubs.h"
 #include "src/compilation-info.h"
@@ skipping 2485 matching lines @@
   int const feedback_slot_index = feedback_index(expr->CallFeedbackICSlot());
   builder()->Call(callee, args, feedback_slot_index, call_type,
                   expr->tail_call_mode());
 }
 
 void BytecodeGenerator::VisitCallSuper(Call* expr) {
   RegisterAllocationScope register_scope(this);
   SuperCallReference* super = expr->expression()->AsSuperCallReference();
 
   // Prepare the constructor to the super call.
-  Register this_function = VisitForRegisterValue(super->this_function_var());
-  builder()->CallRuntime(Runtime::kInlineGetSuperConstructor, this_function);
-
-  Register constructor = this_function;  // Re-use dead this_function register.
-  builder()->StoreAccumulatorInRegister(constructor);
+  VisitForAccumulatorValue(super->this_function_var());
+  Register constructor = register_allocator()->NewRegister();
+  builder()->GetSuperConstructor(constructor);
 
   ZoneList<Expression*>* args = expr->arguments();
 
   // When a super call contains a spread, a CallSuper AST node is only created
   // if there is exactly one spread, and it is the last argument.
   if (!args->is_empty() && args->last()->IsSpread()) {
     RegisterList args_regs =
         register_allocator()->NewRegisterList(args->length() + 2);
     builder()->MoveRegister(constructor, args_regs[0]);
     VisitForRegisterValue(super->new_target_var(), args_regs[1]);
@@ skipping 710 matching lines @@
 }
 
 Runtime::FunctionId BytecodeGenerator::StoreKeyedToSuperRuntimeId() {
   return is_strict(language_mode()) ? Runtime::kStoreKeyedToSuper_Strict
                                     : Runtime::kStoreKeyedToSuper_Sloppy;
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8