[PATCH] D107572: [DAG] DAGCombiner::visitVECTOR_SHUFFLE - recognise chain of INSERT_SUBVECTOR patterns

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

I'm working on a concat(concat,concat) fold that should help a lot more than this (although I might not get it finished before going on holiday next week) - what could be done as an extension of D107068 <https://reviews.llvm.org/D107068> is handle the case where the insert_subvector straddles multiple concat entries (i.e. slice the concat ops into a smaller concat and insert that as a subvector).


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D107572/new/

https://reviews.llvm.org/D107572