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...tc are pervasively treated as not having side effects. The intention, and the only sensible definition for them, is that they are undefined on SNaNs. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180301/b051227f/attachment.html>

> On Feb 28, 2018, at 6:33 PM, Friedman, Eli <efriedma at codeaurora.org> wrote: > > On 2/28/2018 5:46 PM, Chris Lattner wrote: >> On Feb 28, 2018, at 3:29 PM, Kaylor, Andrew via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: >>> For the first part of Sanjay’s question, I think the answer is, “Yes, we can fold all of

On 2/28/2018 5:46 PM, Chris Lattner wrote: > On Feb 28, 2018, at 3:29 PM, Kaylor, Andrew via llvm-dev > <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: >> For the first part of Sanjay’s question, I think the answer is, “Yes, >> we can fold all of these to NaN in the general case.” > > Agreed.  Those IR instructions are undefined on