Install the 'name' property in classes at runtime

src/full-codegen/x64/full-codegen-x64.cc

Index: src/full-codegen/x64/full-codegen-x64.cc
diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc
index 50a5af56d1ad4dfb765ad5b114e11fa4bb95de33..275523df3a5496f303a83257433213a766692259 100644
--- a/src/full-codegen/x64/full-codegen-x64.cc
+++ b/src/full-codegen/x64/full-codegen-x64.cc
@@ -1925,6 +1925,33 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
 }
 
 
+void FullCodeGenerator::EmitClassDefineNameProperty(ClassLiteral* lit) {
+  DCHECK(!lit->constructor()->name().is_null());
+
+  // abort if 'name' is undefined
+  if (lit->constructor()->name()->length() == 0) return;
+
+  Label exit;
+
+  // if "name" is already defined, exit
+  PushOperand(Operand(rsp, 0));  // constructor
+  PushOperand(isolate()->factory()->name_string());
+  CallRuntimeWithOperands(Runtime::kObjectHasOwnProperty);
+  __ CompareRoot(result_register(), Heap::kTrueValueRootIndex);
+  __ j(equal, &exit, Label::kNear);
+
+  // define "name" property
+  PushOperand(Operand(rsp, 0));  // constructor
+  PushOperand(isolate()->factory()->name_string());
+  PushOperand(lit->constructor()->name());
+  PushOperand(Smi::FromInt(DONT_ENUM | READ_ONLY));
+  PushOperand(Smi::FromInt(0));  // NeedsSetFunctionName()
+  CallRuntimeWithOperands(Runtime::kDefineDataPropertyInLiteral);
+
+  __ bind(&exit);
+}
+
+
 void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) {
   PopOperand(rdx);
   Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).code();