[PATCH] D106028: [AArch64][SelectionDAG] Add legalization for widening LOAD/MLOAD.

[Eli Friedman via Phabricator via llvm-commits]

efriedma created this revision.
efriedma added reviewers: sdesmalen, paulwalker-arm, craig.topper.
Herald added subscribers: ecnelises, danielkiss, steven.zhang, hiraditya, kristof.beyls.
efriedma requested review of this revision.
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By the magic of masked loads, a widened MLOAD is almost identical to the original MLOAD.

Need to handle a few more INSERT_SUBVECTOR legalization cases to avoid crashing on the testcase.

The code for computing the mask is unfortunately not very efficient; maybe we need a target-independent version of whilelo?  Or a DAGCombine to form whilelo?


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106028

Files:
  llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
  llvm/test/CodeGen/AArch64/sve-split-load.ll

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