[llvm] [AArch64][PeepholeOpt] Use correct register class for subreg uses fro… (PR #226595)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,51 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
+# RUN: llc -mtriple=aarch64 -run-pass=peephole-opt -verify-machineinstrs -o - %s | FileCheck %s
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arsenm wrote:

```suggestion
# RUN: llc -mtriple=aarch64 -run-pass=peephole-opt -o - %s | FileCheck %s
```

I'm finally fixing the bug in #228248

https://github.com/llvm/llvm-project/pull/226595