8272511: [lworld] Disable PhaseIdealLoop::try_sink_out_of_loop until …

…optimization is stable in mainline

src/hotspot/share/opto/loopopts.cpp

@@ -1575,7 +1575,8 @@ void PhaseIdealLoop::split_if_with_blocks_post(Node *n) {
     }
   }
 
-  try_sink_out_of_loop(n);
+  // TODO Disabled until JDK-8272448 is fixed.
+  // try_sink_out_of_loop(n);
 
   try_move_store_after_loop(n);