Thank you for taking the time to write up those problems! I think both should be fixable - I'll try to find time to do it soonish. (If you find more problems, feel free to create github issues on the gcc-6502-bits repo. I don't check it all the time but I'll see them eventually!).
Thanks,
Julian
As the author of the 6502-gcc compiler port -- thank you for including my work in your benchmark comparison! I don't have a lot of time to work on it at the moment but I love to see people getting some use out of it! I'm a bit puzzled as to why the memcpy test came out so bad. The libtinyc version of memcpy (if that's what's being used) is hand-written and I don't think THAT terrible...