[PATCH] D94306: [LoopRotate] Use llvm.experimental.noalias.scope.decl for duplicating noalias metadata as needed

[Jeroen Dobbelaere via Phabricator via llvm-commits]

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Similar to D92887 <https://reviews.llvm.org/D92887>, LoopRotation also needs duplicate the noalias scopes when rotating a `@llvm.experimental.noalias.scope.decl` across a block boundary.
This is based on the version from the Full Restrict paches (D68511 <https://reviews.llvm.org/D68511>).

The problem it fixes also showed up in Transforms/Coroutines/ex5.ll after D93040 <https://reviews.llvm.org/D93040>


https://reviews.llvm.org/D94306

Files:
  llvm/lib/Transforms/Utils/LoopRotationUtils.cpp
  llvm/test/Transforms/LoopRotate/noalias.ll

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