 Fix add/mul/sub/div constant folding.
 Fix add/mul/sub/div constant folding.
JohanEngelen/SDC,SDC-Developers/SDC,sidmutha/SDC,DmitryOlshansky/SDC,sidmutha/SDC,DmitryOlshansky/SDC,bpr/SDC,DmitryOlshansky/SDC,bpr/SDC,schancel/SDC,schancel/SDC,deadalnix/SDC,JohanEngelen/SDC,schancel/SDC,deadalnix/SDC,carlor/SDC,deadalnix/SDC,UplinkCoder/SDC,SDC-Developers/SDC,UplinkCoder/SDC,JohanEngelen/SDC,sidmutha/SDC,bpr/SDC,SDC-Developers/SDC,UplinkCoder/SDC