Load constants from the DescriptorArray

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index 843005d506c033ef162ac7c8078cddcbe6a3f2a7..e3a92871d92fe494ebaedee1516915429dad6764 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -759,6 +759,14 @@ void NamedLoadHandlerCompiler::GenerateLoadField(
 }
 
 
+void NamedLoadHandlerCompiler::GenerateLoadConstant(Register reg,
+                                                    int constant_index) {
+  if (!reg.is(receiver())) __ movp(receiver(), reg);
+  LoadConstantStub stub(isolate(), constant_index);
+  GenerateTailCall(masm(), stub.GetCode());
+}
+
+
 void NamedLoadHandlerCompiler::GenerateLoadCallback(
     Register reg, Handle<ExecutableAccessorInfo> callback) {
   // Insert additional parameters into the stack frame above return address.