[llvm] AMDGPU/GlobalISel: Add tests for missing readanylane combines (PR #142788)

[Petar Avramovic via llvm-commits]

petar-avramovic wrote:

* **#142790** <a href="https://app.graphite.dev/github/pr/llvm/llvm-project/142790?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a>
* **#142789** <a href="https://app.graphite.dev/github/pr/llvm/llvm-project/142789?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a>
* **#142788** <a href="https://app.graphite.dev/github/pr/llvm/llvm-project/142788?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a> 👈 <a href="https://app.graphite.dev/github/pr/llvm/llvm-project/142788?utm_source=stack-comment-view-in-graphite" target="_blank">(View in Graphite)</a>
* `main`


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https://github.com/llvm/llvm-project/pull/142788