Maurizio Vitale writes: > > > Can somebody shed some light on this and hint at why GCC (and the > Intel compiler) decide that they cannot remove that code? It would be easy for us to do so if you provided a test case. Without one it's impossible. It doesn't look to me like the expression is totally dead, but without the source I can't tell. > I remember a few years ago GCC had problems with liveness analysis w/ > stack slots. Is that still the case? I don't think so. Andrew.