[llvm] [AMDGPU] Eliminate redundant SGPR restores (PR #222680)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,61 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
+# RUN: llc -mtriple=amdgpu9.06-amd-amdhsa -verify-machineinstrs -run-pass=si-lower-sgpr-spills -o - %s | FileCheck %s
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arsenm wrote:

```suggestion
# RUN: llc -mtriple=amdgpu9.06-amd-amdhsa -run-pass=si-lower-sgpr-spills -o - %s | FileCheck %s
```

https://github.com/llvm/llvm-project/pull/222680