Yes, that's what I want to do. As I mentioned in the subject, I'd like to realize s/w individualization via compiler optimization, and I still need to think of some more techniques. Thanks for your help.
Regards, Byoungyoung Lee On Sun, Nov 8, 2009 at 4:36 AM, Ian Lance Taylor <i...@google.com> wrote: > Byoungyoung Lee <lifeasag...@gmail.com> writes: > >> If the optimization options provided in a different way, >> the same source codes would be compiled into different executables. >> >> In the different executables, >> the register allocation or instruction orders might be easily changed, >> but I think that's not that big change. >> What I'd like to do is to make their CFG different, while their impact >> on executing performance is reasonable. >> >> I'm reading through the compiler books and gcc internal documentations, >> but it's really hard for me to pin point what I really need to read >> and understand. >> >> So, my question is what kind of optimizing options in gcc could be >> used to do such jobs ? >> or would you recommend good references for this ? > > Sorry, I don't understand the question. Are you asking what gcc > options will produce a different CFG? If so, this question would be > better asked on gcc-h...@gcc.gnu.org. One answer is that you will get > a slightly different CFG from options like -funroll-loops. In general > there are a number of options which could change the CFG. But I'm not > sure why you are asking the question. > > Ian >
