[all-commits] [llvm/llvm-project] 7bb87d: [AArch64][GlobalISel] Take abs scalar codegen clos...

[Madhur Amilkanthwar via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7bb87d533891c2bcfa1c9132605f0d3e8227d444
      https://github.com/llvm/llvm-project/commit/7bb87d533891c2bcfa1c9132605f0d3e8227d444
  Author: Madhur Amilkanthwar <madhura at nvidia.com>
  Date:   2024-03-21 (Thu, 21 Mar 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
    M llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-abs.mir
    M llvm/test/CodeGen/AArch64/abs.ll

  Log Message:
  -----------
  [AArch64][GlobalISel] Take abs scalar codegen closer to SDAG (#84886)

This patch improves codegen for scalar (<128bits) version
of llvm.abs intrinsic by using the existing non-XOR based lowering.
This takes the generated code closer to SDAG.

codegen with GISel for > 128 bit types is not very good
with these method so not doing so.



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