[PATCH] D80208: [CodeGen] Add support for extracting elements of scalable vectors

[David Sherwood via Phabricator via llvm-commits]

david-arm created this revision.
david-arm added a reviewer: sdesmalen.
Herald added subscribers: llvm-commits, hiraditya, kristof.beyls.
Herald added a reviewer: rengolin.
Herald added a project: LLVM.

I have tried to ensure that SelectionDAG and DAGCombiner do
sensible things for scalable vectors, and added support for a
limited number of simple folds. Codegen support for the vector
extract patterns have also been added to the AArch64 backend.

New vector extract tests have been added here:

  CodeGen/AArch64/sve-extract-element.ll

and I have also added new folds using inserts and extracts here:

  CodeGen/AArch64/sve-insert-element.ll


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80208

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
  llvm/test/CodeGen/AArch64/sve-extract-element.ll
  llvm/test/CodeGen/AArch64/sve-insert-element.ll

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