[llvm-branch-commits] [llvm] [SelectionDAG] Fold EXTRACT_SUBVECTOR(EXTRACT_SUBVECTOR(X, C1), C0) with nonzero indices (PR #200935)

[Simon Pilgrim via llvm-branch-commits]

https://github.com/RKSimon requested changes to this pull request.

Missing test coverage.

Also - whats with the weird patch stack? Is it really necessary or should all be rebased from upstream trunk now?

https://github.com/llvm/llvm-project/pull/200935