[llvm] [LoopUnroll] Ensure we can accept both `llvm.loop.unroll.full` and `llvm.loop.unroll.enable` metadata on the same loop (NFC) (PR #182381)

[Nikita Popov via llvm-commits]

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@@ -0,0 +1,80 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -passes=verify,loop-unroll -S < %s | FileCheck %s
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nikic wrote:

```suggestion
; RUN: opt -passes=loop-unroll -S < %s | FileCheck %s
```
verify is implicit

https://github.com/llvm/llvm-project/pull/182381