[llvm] AMDGPU: Use srcvalue and delete Ignore complex pattern (PR #161359)

[Petar Avramovic via llvm-commits]

petar-avramovic wrote:

### Merge activity

* **Sep 30, 2:17 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/161359).


https://github.com/llvm/llvm-project/pull/161359