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

[via llvm-commits]

v01dXYZ wrote:

@topperc Thanks. I'll instead publish a PR for the targets that have `i16` and set `FABS/f16` action to `Promote`.

I'll put back this PR to Draft.

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