[es6] Perform the IsConstructor test in GetSuperConstructor.

src/compiler/opcodes.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 #include <iosfwd>
 
 #include "src/globals.h"
@@ skipping 119 matching lines @@
   V(JSCreateLiteralObject)    \
   V(JSCreateLiteralRegExp)    \
   V(JSLoadProperty)           \
   V(JSLoadNamed)              \
   V(JSLoadGlobal)             \
   V(JSStoreProperty)          \
   V(JSStoreNamed)             \
   V(JSStoreGlobal)            \
   V(JSDeleteProperty)         \
   V(JSHasProperty)            \
-  V(JSInstanceOf)
+  V(JSInstanceOf)             \
+  V(JSGetSuperConstructor)

[caitp, 2016/11/21 13:52:53]

Do we need this to be a JS operator instead of a simplified operator? (Do we
need the Context input, or can we get that during inlining of the class 
constructor?)

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

It can raise exceptions, thus it needs a proper context. Also the contract is
currently, that everything that can potentially throw or has some other
JavaScriptish semantics, has to be a JS operator. (it's not the best contract, I
know).

 
 #define JS_CONTEXT_OP_LIST(V) \
   V(JSLoadContext)            \
   V(JSStoreContext)           \
   V(JSCreateFunctionContext)  \
   V(JSCreateCatchContext)     \
   V(JSCreateWithContext)      \
   V(JSCreateBlockContext)     \
   V(JSCreateScriptContext)
 
@@ skipping 635 matching lines @@
   }
 };
 
 V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_