[PATCH] D92247: [IR][LoopRotate] avoid leaving phi with no operands (PR48296)

[Chris Lattner via Phabricator via llvm-commits]

lattner added a comment.

I don't think this is the right way to go, this breaks the invariant that # inputs to a phi node should match the # predecessors to a block.  I'd recommend allowing zero input phi nodes in zero-predecessor blocks.  I'm not sure why we ban zero input phi nodes right now.


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  https://reviews.llvm.org/D92247/new/

https://reviews.llvm.org/D92247