On 01/06/2010 09:59 AM, Mark Colby wrote: >>>> Yabbut, how come RTL cse can handle it in x86_64, but PPC not? >>> >>> Probably because the RTL on x86_64 uses and's and ior's, but PPC uses >>> set's of zero_extract's (insvsi). >> >> Aha! Yes, that'll probably be it. It should be easy to fix cse to >> recognize those too.
> I'm not familiar with the gcc source yet, but just in case I get the > time to look at this, could anyone give me a file/line ref to dive > into and examine? Would you believe cse.c? :-) I can't find the line without investigating further. Andrew. P.S. This is a nontrivial task if you don't know gcc, but might be a good place for a beginner to start. OTOH, might be hard: no way to know without digging.
