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...writing. Could you give me some C (or C++) for an illustrative example. I think I understand your concern, but I'd like to be sure. Thanks, Preston -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121102/88c02212/attachment.html>

Hey Preston, I wanted to let you know that we found a really serious problem with DependenceAnalysis in PR14241. In summary, DA seems to have a baked-in assumption that the base pointer of the GEPs it inspects are loop invariant. It appears to only do analysis on the subscripts. This is especially important for LLVM because C++ code (compiled through Clang) very frequently expresses loops as