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You hit send right when I did! > For your example, do you mean that it's grouped like: > (fadd (fadd (fmul a b) (fmul c d)) e) > > How would your pass go about handling these patterns and is that something > that would be too complicated for fast-isel to do on the fly? > > Depends on how they're grouped, but if the formation happens prior to codegen then fast-isel will

On Dec 12, 2012, at 4:49 PM, Shuxin Yang <shuxin.llvm at gmail.com> wrote: > Hi, Eli, Mike and Lang: > > Thank you all for the input. This is one e.g which might be difficult for isel: > a*b + c*d + e => a*b + (c*d + e). > You hit send right when I did! For your example, do you mean that it's grouped like: (fadd (fadd (fmul a b) (fmul c d)) e) How would your

...ns prior to codegen then fast-isel will just handle whatever new instruction you've got. An example of IR would be useful though :) > > -eric -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121212/3c4d996a/attachment.html>