On Thu, 5 May 2011, Francis Girard wrote: > How may we _easily_ know whether the compiler did indeed unroll a loop > or not in C/C++ ? In case of GCC, you can add -fdump-rtl-loop2_unroll-slim to compiler command line and examine the resulting dump file (look for ";; Unrolled loop"), although there is no easy way to tell to which loop the compiler is referring to. It is still usable in case there is only one loop in the function you're interested in. Alexander
