[all-commits] [llvm/llvm-project] f0660a: [Local] collectBitParts - bail out if we find more...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f0660a977e6822ae68e4c88641d1909b555f0e05
      https://github.com/llvm/llvm-project/commit/f0660a977e6822ae68e4c88641d1909b555f0e05
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-05-15 (Sat, 15 May 2021)

  Changed paths:
    M llvm/lib/Transforms/Utils/Local.cpp

  Log Message:
  -----------
  [Local] collectBitParts - bail out if we find more than one root input value.

All the uses that we have for collectBitParts revolve around us matching down to an operation with a single root value - I don't think we're intending to change that (and a lot of collectBitParts assumes it).

The binops cases (OR/FSHL/FSHR) already check if the providers are the same, but that would still mean we waste time collecting through unaryops before getting to them.