Hi all, is it possible that the register allocation on x86_64 is a bit inefficient? No matter the optimization settings, I can never get FPC to use more than the rax and rdx registers. Especially $Optimization REGVAR does nothing (not even for loop variables). Instead, two nested loops are enough to get FPC to constantly do memory load/stores on the loop variables. If an assembler block is marked as using ['rdx', 'rax'] (i.e.: rdtsc), instead of using some other general-purpose registers, FPC stores them to memory before and reloads after the block. That doesn't seem very efficient...
Is there anything else that needs to be switched on? I have the target arch set to -CpCOREAVX2. Regards, Martok _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
