make isolate accessible from returnvalue

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 36fcb84de2e4929bb5ffa2f0e2fb8b4e95df5a5b..c1cab8f2a2cf287fea538af4337fa5709ac2158c 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -1303,9 +1303,9 @@ void BaseLoadStubCompiler::GenerateLoadCallback(
   } else {
     __ Push(Handle<Object>(callback->data(), isolate()));
   }
-  __ PushAddress(ExternalReference::isolate_address(isolate()));
   __ LoadRoot(kScratchRegister, Heap::kUndefinedValueRootIndex);
   __ push(kScratchRegister);  // return value
+  __ PushAddress(ExternalReference::isolate_address(isolate()));
   __ push(name());  // name
   // Save a pointer to where we pushed the arguments pointer.  This will be
   // passed as the const ExecutableAccessorInfo& to the C++ callback.
@@ -1350,7 +1350,7 @@ void BaseLoadStubCompiler::GenerateLoadCallback(
   __ CallApiFunctionAndReturn(getter_address,
                               kStackSpace,
                               returns_handle,
-                              3);
+                              4);
 }