[PATCH] D68298: [GlobalOpt] Pass DTU to removeUnreachableBlocks instead of recomputing.

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

Yes, we're still on the legacy manager, so DT is not available here. I've just verified that reverting this patch does indeed reclaim a sizable part of the LLVM 10 compile-time regressions (end-to-end timings <https://perf.rust-lang.org/compare.html?start=97588aeda139309169b11654fc809e1ac5fd246c&end=1b6633b46cd7705ec813cfd1cd7083e92f9da903>).


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