[llvm] [LoopInterchange] Prevent the transformation stage from stopping partway (PR #205564)

[Sjoerd Meijer via llvm-commits]

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@@ -2184,11 +2183,8 @@ bool LoopInterchangeTransform::transform(
 
   // Ensure the inner loop phi nodes have a separate basic block.
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sjoerdmeijer wrote:

Nit: maybe update the comment that this is now done unconditionally, and why.

https://github.com/llvm/llvm-project/pull/205564