[PATCH] D109313: [SelectionDAG] PromoteIntRes_EXTRACT_SUBVECTOR for scalable vectors.

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen created this revision.
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This patch implements legalization of EXTRACT_SUBVECTOR for the case
where the result needs promoting, and the input type is either legal
or requires splitting.

The idea is that the operation is broken down into simpler steps,
by first extracting a smaller subvector until the input vector
becomes legal or requires promotion.

Change-Id: Ifcafbefab8c7c0e2dbf3104425ca1eca33c81da0


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D109313

Files:
  llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  llvm/test/CodeGen/AArch64/sve-extract-vector.ll

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