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...by duplicating code, but it's really hard to pattern match back EH dispatch once it's been allowed to round trip through memory, phis, GVN, etc. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150618/b4682288/attachment.html>

> optimizing EH codepaths is not usually performance critical. >> Leaving aside the rest of the thread, I feel the need to refute this point in isolation. I've found that optimizing (usually simplifying and eliminating) exception paths ends up being *extremely* important for my workloads. Failing to optimize exception paths sufficiently tends to indirectly hurt things like inlining