[llvm] [AMDGPU] Use s_cmovk_i32 instead of s_cselect_b32 when applicable (PR #135232)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,35 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
+# RUN: llc -mtriple=amdgcn -mcpu=gfx900 -verify-machineinstrs -start-before si-shrink-instructions -stop-before si-post-ra-bundler -o - %s | FileCheck -check-prefix=GCN %s
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arsenm wrote:

```suggestion
# RUN: llc -mtriple=amdgcn -mcpu=gfx900 -start-before=si-shrink-instructions -stop-before=si-post-ra-bundler -o - %s | FileCheck -check-prefix=GCN %s
```

https://github.com/llvm/llvm-project/pull/135232