[llvm] [Passes] Generalize ShouldRunExtraVectorPasses to allow re-use (NFCI). (PR #118323)

[Nikita Popov via llvm-commits]

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@@ -935,6 +935,38 @@ struct InvalidateAllAnalysesPass : PassInfoMixin<InvalidateAllAnalysesPass> {
   }
 };
 
+/// A marker analyss to determine if extra passes should be run on demand.
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nikic wrote:

```suggestion
/// A marker analysis to determine if extra passes should be run on demand.
```

https://github.com/llvm/llvm-project/pull/118323