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On Mar 22, 2009, at 7:53 AM, someguy wrote: > Hi all, > > I've spent the day trying to understand setcc/select_cc intricacies, > and I thought I should mention that so far as I can tell, the modeling > of CPU flags, condition codes and therefore conditional instructions > seems pretty broken. > > On the one hand there are the SDNPInFlag/SDNPOutFlag node properties >

...ful both during instruction selection and scheduling. I'm more than happy to help in whatever way I can to push this amazing tool forward ;) Justin. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20090323/9c53acc0/attachment.html>

Hi all, I've spent the day trying to understand setcc/select_cc intricacies, and I thought I should mention that so far as I can tell, the modeling of CPU flags, condition codes and therefore conditional instructions seems pretty broken. On the one hand there are the SDNPInFlag/SDNPOutFlag node properties which allow you to mark an instruction as using or def-ing the CPU flags