Install the 'name' property in classes at runtime

src/compiler/ast-graph-builder.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/compiler/ast-graph-builder.h"
 
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/compilation-info.h"
 #include "src/compiler.h"
@@ skipping 1654 matching lines @@
         NewNode(op, receiver, key, value, attr);
         break;
       }
       case ClassLiteral::Property::FIELD: {
         UNREACHABLE();
         break;
       }
     }
   }
 
-  // Set the constructor to have fast properties.
   prototype = environment()->Pop();
   literal = environment()->Pop();
+
+  // ES6 section 14.5.16 class expression evaluation, step 5
+  DCHECK(expr->constructor()->raw_name() != nullptr);
+  if (!expr->constructor()->raw_name()->IsEmpty()) {
+    Node* value = jsgraph()->Constant(expr->constructor()->name());
+    const Operator* op =
+        javascript()->CallRuntime(Runtime::kDefineClassNameProperty);
+    literal = NewNode(op, literal, value);
+    PrepareFrameState(literal, BailoutId::None());
+  }
+
+  // Set the constructor to have fast properties.
   const Operator* op = javascript()->CallRuntime(Runtime::kToFastProperties);
   literal = NewNode(op, literal);
 
   // Assign to class variable.
   if (expr->class_variable_proxy() != nullptr) {
     Variable* var = expr->class_variable_proxy()->var();
     VectorSlotPair feedback = CreateVectorSlotPair(
         expr->NeedsProxySlot() ? expr->ProxySlot()
                                : FeedbackVectorSlot::Invalid());
     BuildVariableAssignment(var, literal, Token::INIT, feedback,
@@ skipping 2667 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8