Hi Leo, > Is this reordering provided by a gcc command? Not all optimizations are independently toggle-able by -f switches. Many optimizations are enabled wholesale / carte blanche by the -O1 or -O2 or -O3 switches. Note: to see which toggle-able -f switches are enabled, without meticulously scouring the manual, use this technique: echo '' | g++ -O2 -fverbose-asm -S -x c++ - -o - | grep '^;' HTH, --Eljay
