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...e_global, %s store i32 42, i32* %addr This is well defined as per the spec David sent out. %x is not poison. %x1 is, but that's fine. Philip -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150128/85639b0f/attachment.html>

On Tue, Jan 27, 2015 at 8:58 PM, Sanjoy Das <sanjoy at playingwithpointers.com> wrote: > > Ah, yes. You are right, we cannot always assume that %y would be zero in > > the second case. > > This wouldn't be the first time we've lost information that we could use > to > > optimize a program by transforming it. > > > > Do you think this result