On 09 Apr 2011, at 20:08, Sergei Gorelkin wrote: > I wonder whether it is possible to assign a priority (or order) of registers > for FPC's register allocator. Currently registers are allocated in the order > of ordinals defined in cpubase.pas. On i386 it doesn't make any difference, > but on x86_64 'nonvolatile' rbx (and in Win64 also rsi and rdi) are always > used before 'volatile' ones r8..r11. Reversing this order would help avoiding > stackframes in simple procedures, resulting in nicer code. > > Maybe somebody could share some clues about if this is possible and where to > start looking?
Simply changing the register order in the array to trgcpu.create in Tcgx86_64.init_register_allocators should do it. Jonas_______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
