[PATCH] D94525: [SVE][CodeGen] Remove performMaskedGatherScatterCombine

[Kerry McLaughlin via Phabricator via llvm-commits]

kmclaughlin created this revision.
kmclaughlin added reviewers: sdesmalen, david-arm, craig.topper.
Herald added subscribers: NickHung, psnobl, hiraditya, kristof.beyls, tschuett.
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The AArch64 DAG combine added by D90945 <https://reviews.llvm.org/D90945> & D91433 <https://reviews.llvm.org/D91433> extends the index
of a scalable masked gather or scatter to i32 if necessary.

This patch removes the combine and instead adds shouldExtendGSIndex, which
is used by visitMaskedGather/Scatter in SelectionDAGBuilder to query whether
the index should be extended before calling getMaskedGather/Scatter.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D94525

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h

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