[PATCH] D51112: [ValueTracking] Teach computeNumSignBits to understand min/max clamp patterns with constant/splat values

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> I'm still calling computeNumSignBits on the other input. I don't think SelectionDAG does that.

Thinking about it a bit more, there's probably a good reason for that: if the number of sign bits for the variable input matters, either the SMIN or the SMAX is a no-op.


https://reviews.llvm.org/D51112