This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: trouble emilinating redundant compares


On 01/18/2012 08:16 AM, Paul S wrote:
> Thanks H-P,
> 
> That worked first time !
> 
> For a few days I had been searching the non cc0 ports for hints. Two
> of the ports don't bother using the set CC side effect to avoid
> compares and the others are obfuscated by the fact that they
> (understandably) use custom CC modes and the reload conditions aren't
> obvious - even when I inspected the .c file CCmode tests.

Don't look at i386 -- it doesn't use compare-elim.c.
Look at the mn10300 and rx ports instead.


r~


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]