[PATCH] D150482: [AArch64] Don't use tbl lowering if ZExt can be folded into user.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: t.p.northover, dmgreen, paquette, efriedma.
Herald added subscribers: StephenFan, hiraditya, kristof.beyls.
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fhahn requested review of this revision.
Herald added a project: LLVM.

If the ZExt can be lowered to a single ZExt to the next power-of-2 and
the remaining ZExt folded into the user, don't use tbl lowering.

Fixes #62620.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150482

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/CodeGenPrepare.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
  llvm/test/CodeGen/AArch64/sve-fixed-vector-zext.ll
  llvm/test/CodeGen/AArch64/zext-to-tbl.ll

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