[PATCH] D85778: More accurately compute the ranges of possible values for +, -, *, &, %.

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith added a comment.

In D85778#2248714 <https://reviews.llvm.org/D85778#2248714>, @nikic wrote:

> Just for the record, the additional analysis has a measurable compile-time impact (0.3% at O0): https://llvm-compile-time-tracker.com/compare.php?from=e7f53044e7263cdbbb4fed9abf086b88ba486bba&to=cff6dda604cb0548bef5e5951dd1e74536110588&stat=instructions

Thanks, it seems very likely that this is caused by `CheckImplicitConversion` now calling `CheckExprRange` twice. It looks like that's not only avoidable, but there's a (pre-existing) bug here that we can squash at the same time :) Should be fixed in rG0ffbbce78de60f4f4d03d6ef97fe2f3bb4275e08 <https://reviews.llvm.org/rG0ffbbce78de60f4f4d03d6ef97fe2f3bb4275e08>.


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