As far as i know, it seems that the creation of these temporary variables is automatic, so they can not be removed.
Ting SU,software institute,East China Normal University
From: प्रतीक स्कायवाल्कर
Date: 2013-03-10 00:52
Subject: [CIL users] Creation of Temporary Variables
The cil transformation introduces temporary variables during the processing of increment/ decrement operators. Is there a way to suppress the creation of these temporary variables?