[PATCH] D28927: [ValueTracking] Add comment that CannotBeOrderedLessThanZero does the wrong thing for powi.

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

Oh, wait, I see, I really messed up my review of SignBitMustBeZero()... we return the wrong result for a ton of stuff.  I'd still prefer a bug report with a testcase over a TODO comment.


https://reviews.llvm.org/D28927