Install ConstructNonConstructable as construct stub for non-constructables.

src/compiler/js-typed-lowering.cc

 // Copyright 2014 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/code-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
@@ skipping 1380 matching lines @@
   Type* const target_type = NodeProperties::GetType(target);
   Node* const new_target = NodeProperties::GetValueInput(node, 1);
   Node* const effect = NodeProperties::GetEffectInput(node);
   // TODO(turbofan): Add support for NewTarget passed to JSCreate.
   if (target != new_target) return NoChange();
   // Extract constructor function.
   if (target_type->IsConstant() &&
       target_type->AsConstant()->Value()->IsJSFunction()) {
     Handle<JSFunction> constructor =
         Handle<JSFunction>::cast(target_type->AsConstant()->Value());
-    // Check that function is a constructor.
-    if (!constructor->IsConstructor()) return NoChange();
+    DCHECK(constructor->IsConstructor());
     // Force completion of inobject slack tracking before
     // generating code to finalize the instance size.
     if (constructor->IsInobjectSlackTrackingInProgress()) {
       constructor->CompleteInobjectSlackTracking();
     }
 
     // TODO(bmeurer): We fall back to the runtime in case we cannot inline
     // the allocation here, which is sort of expensive. We should think about
     // a soft fallback to some NewObjectCodeStub.
     if (IsAllocationInlineable(constructor)) {
@@ skipping 1207 matching lines @@
 }
 
 
 CompilationDependencies* JSTypedLowering::dependencies() const {
   return dependencies_;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8