[llvm-branch-commits] [llvm] [AMDGPU][RegBankCombiner] Add cast_of_cast and constant_fold_cast combines (PR #131307)

[Pierre van Houtryve via llvm-branch-commits]

Pierre-vh wrote:

### Merge activity

* **Mar 17, 4:51 AM EDT**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/131307).


https://github.com/llvm/llvm-project/pull/131307