[llvm] [LLVM][IR] Support target extension types in vectors (PR #140630)

[Nikita Popov via llvm-commits]

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@@ -1037,6 +1043,13 @@ static TargetTypeInfo getTargetTypeInfo(const TargetExtType *Ty) {
                           TargetExtType::CanBeGlobal);
   }
 
+  // Type used to test vector element target extension property.
+  // Can be removed once a public target extension type uses CanBeVectorElement
----------------
nikic wrote:

```suggestion
  // Can be removed once a public target extension type uses CanBeVectorElement.
```

https://github.com/llvm/llvm-project/pull/140630