[llvm] AMDGPU/GlobalISel: RegBankLegalize rules for G_FABS and G_FNEG (PR #168411)

[Petar Avramovic via llvm-commits]

petar-avramovic wrote:

### Merge activity

* **Nov 24, 3:34 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.com/github/pr/llvm/llvm-project/168411).


https://github.com/llvm/llvm-project/pull/168411