[llvm] [AMDGPU] Fix SDWA 'preserve' transformation for instructions in different basic blocks. (PR #82406)

[Jay Foad via llvm-commits]

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@@ -160,3 +160,75 @@ body:             |
     S_ENDPGM 0
 
 ...
+---
+name:            add_f16_u32_preserve_different_bb
+tracksRegLiveness: true
+registers:
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jayfoad wrote:

Can you remove the `registers` section?

https://github.com/llvm/llvm-project/pull/82406