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As came up recently in other threads, loop passes really get in the way. Here are some of the ways: - There is only one Loop analysis pass - IVUsers. It seems unlikely that the loop nest walk is critical to computing this or preserving it. - Almost all of the things we think of as "required" and dependencies are actually *transforms* that canonicalize the form of a loop into particular

...oopPasses. I think I could implement this simpler option right away, and that would unblock a lot of our efforts around unrolling, vectorizing, and PGO. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140122/93f989ae/attachment.html>