[PATCH] D108590: [AArch64][GlobalISel] Select @llvm.aarch64.neon.ld2.*

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
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This is pretty similar to the ST2 selection code in `AArch64InstructionSelector::selectIntrinsicWithSideEffects`.

This is a GISel equivalent of the ld2 case in `AArch64DAGToDAGISel::Select`. There's some weirdness there that appears here too (e.g. using ld1 for scalar cases, which are 1-element vectors in SDAG.)

It's a little gross that we have to create the copy and then select it right after, but I think we'd need to refactor the existing copy selection code quite a bit to do better.

This was falling back while building llvm-project with GISel for AArch64.


https://reviews.llvm.org/D108590

Files:
  llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/select-ld2.mir

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