[all-commits] [llvm/llvm-project] e97b8a: [AArch64] Don't use tbl lowering if ZExt can be fo...

Florian Hahn via All-commits all-commits at lists.llvm.org
Fri Jun 2 03:53:35 PDT 2023

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e97b8a7e3fb9d4bd270bb25bac9777d86dcbdaf3
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2023-06-02 (Fri, 02 Jun 2023)

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

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

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.

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D150482

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