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On Wed, Feb 4, 2015 at 9:13 AM, John Regehr <regehr at cs.utah.edu> wrote: > I think such a thing would be great. However, there is a problem that the >> RFC wasn't aware of when it was >> written: >> >> consider: >> %S = select %A, %B, undef >> >> without us knowing anything about %A or %B, we will replace all uses of >> %S with %B.

...nnan float %a, %b %cmp = fcmp ord float %add, 0.000000e+00 ret i1 %cmp } Now we will have: %add = float undef %cmp = i1 undef > > > John -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150204/5727d4d5/attachment.html>