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Yeah, the alternative is to do movabs and then test, which is doable but I’m not sure if it’s worth it (surely BT + risk of flags merging penalty has to be better than two ops, one of which is ~9-10 bytes). Fiona > On Jan 22, 2015, at 2:59 PM, Chris Sears <chris.sears at gmail.com> wrote: > > My bad on that. So that's what the comment meant. > That means BT is pretty much

...; That may be worth testing the -Os flag. > You'll want -Oz here, Os isn't supposed to affect the runtime as much as this is going to. -eric -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150122/f30cc3b9/attachment.html>