[llvm] [LegalizeDAG] PromoteNode FABS: Override promotion with clear sign bit (PR #106076)

[Craig Topper via llvm-commits]

topperc wrote:

> @topperc that's a valid point (even though I thought that expand means using smaller types to compute the result).

That's what Expand means for LegalizeTypes. For LegalizeDAG, Expand just means to emulate it any way we can.

https://github.com/llvm/llvm-project/pull/106076