[llvm] [CodeGen][NPM] Port MachineBlockPlacement to NPM (PR #129828)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,13 @@
+# RUN: llc -mtriple=x86_64-unknown-linux-gnu -passes="block-placement<tail-merge>,block-placement<no-tail-merge>" -print-pipeline-passes -o /dev/null %s 2>&1 | FileCheck %s --check-prefix=CHECK
+
+# RUN: not llc -mtriple=x86_64-unknown-linux-gnu -passes="block-placement<invalid-opt>" -print-pipeline-passes -o /dev/null %s 2>&1 | FileCheck %s --check-prefix=CHECK-NOT
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arsenm wrote:

```suggestion
# RUN: llc -mtriple=x86_64-unknown-linux-gnu -passes='block-placement<tail-merge>,block-placement<no-tail-merge>' -print-pipeline-passes -filetype=null %s 2>&1 | FileCheck %s --check-prefix=CHECK

# RUN: not llc -mtriple=x86_64-unknown-linux-gnu -passes='block-placement<invalid-opt>' -print-pipeline-passes -filetype=null %s 2>&1 | FileCheck %s --check-prefix=CHECK-NOT
```

https://github.com/llvm/llvm-project/pull/129828