[llvm] [AMDGPU] Fix a crash by skipping DBG instrs at start of sched region (PR #131167)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,30 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
+# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx942 -verify-machineinstrs -run-pass=machine-scheduler -o - %s | FileCheck %s
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arsenm wrote:

```suggestion
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx942 -run-pass=machine-scheduler -verify-misched -o - %s | FileCheck %s
```

https://github.com/llvm/llvm-project/pull/131167