Install the 'name' property in classes at runtime

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index 68cf58905f87e1f62e0d2186409657ba29861d39..f213de56cdc23a942271b0bd33a18684cb6f4177 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -1659,6 +1659,39 @@ void AstGraphBuilder::VisitClassLiteral(ClassLiteral* expr) {
     }
   }
 
+  // ES6 section 14.5.16 class expression evaluation, step 5
+  DCHECK(!expr->constructor()->name().is_null());
+  // abort if 'name' is undefined
+  if (expr->constructor()->name()->length() != 0) {
+    // if "name" is already defined, exit
+    environment()->Push(environment()->Peek(1));  // literal
+    Node* receiver = environment()->Pop();
+    Node* key = jsgraph()->Constant(isolate()->factory()->name_string());
+    IfBuilder has_name(this);
+    const Operator* has_name_op =
+        javascript()->CallRuntime(Runtime::kObjectHasOwnProperty);
+    Node* has_name_call = NewNode(has_name_op, receiver, key);
+    PrepareFrameState(has_name_call, BailoutId::None());
+    has_name.If(has_name_call, BranchHint::kFalse);
+    has_name.Then();
+    has_name.Else();
+    {
+      // define "name" property
+      environment()->Push(environment()->Peek(1));  // literal
+      Node* receiver = environment()->Pop();
+      Node* key = jsgraph()->Constant(isolate()->factory()->name_string());
+      Node* value = jsgraph()->Constant(expr->constructor()->name());
+      Node* attr = jsgraph()->Constant(DONT_ENUM | READ_ONLY);
+      Node* set_function_name = jsgraph()->Constant(0);
+      const Operator* define_name_op =
+          javascript()->CallRuntime(Runtime::kDefineDataPropertyInLiteral);
+      Node* define_name_call = NewNode(define_name_op, receiver, key, value,
+                                       attr, set_function_name);
+      PrepareFrameState(define_name_call, BailoutId::None());
+    }
+    has_name.End();
+  }
+
   // Set the constructor to have fast properties.
   prototype = environment()->Pop();
   literal = environment()->Pop();