[es6] Perform the IsConstructor test in GetSuperConstructor.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index c67e5d43f706b797a63f5fe9b77257d0fefefe69..802745a85287e0fc17d1c6a55aa3a7409203a20a 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -2485,10 +2485,10 @@ void BytecodeGenerator::VisitCallSuper(Call* expr) {
   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);
+  VisitForAccumulatorValue(super->this_function_var());
+  builder()->GetSuperConstructor();

[Benedikt Meurer, 2016/11/23 04:51:00]

We should probably pass an output register to this bytecode, because we will
always store the result to some register anyways, so we could save the Star
bytecode. Ross?

[rmcilroy, 2016/11/23 21:55:37]

Yup sounds good, just add a kRegOut operand and pass the register as an operand.

 
-  Register constructor = this_function;  // Re-use dead this_function register.
+  Register constructor = register_allocator()->NewRegister();
   builder()->StoreAccumulatorInRegister(constructor);
 
   RegisterList args =