[all-commits] [llvm/llvm-project] 6b37a6: [GlobalISel][AArch64] Combine unmerge(G_EXT v, und...

[Vladislav Dzhidzhoev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6b37a65264bb4e7d400d5283a65f9e8e1575f2d7
      https://github.com/llvm/llvm-project/commit/6b37a65264bb4e7d400d5283a65f9e8e1575f2d7
  Author: Vladislav Dzhidzhoev <vdzhidzhoev at accesssoftek.com>
  Date:   2023-09-05 (Tue, 05 Sep 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64Combine.td
    M llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp
    M llvm/test/CodeGen/AArch64/arm64-neon-add-pairwise.ll
    M llvm/test/CodeGen/AArch64/arm64-vabs.ll
    M llvm/test/CodeGen/AArch64/arm64-vcvt_f.ll

  Log Message:
  -----------
  [GlobalISel][AArch64] Combine unmerge(G_EXT v, undef) to unmerge(v).

When having <N x t> d1, unused = unmerge(G_EXT <2*N x t> v1, undef, N),
it is possible to express it just as unused, d1 = unmerge v1.

It is useful for tackling regressions in arm64-vcvt_f.ll, introduced in
https://reviews.llvm.org/D144670.


  Commit: 0e826f0e6dbedc09db29aa62f3fd34db8fee328f
      https://github.com/llvm/llvm-project/commit/0e826f0e6dbedc09db29aa62f3fd34db8fee328f
  Author: Vladislav Dzhidzhoev <vdzhidzhoev at accesssoftek.com>
  Date:   2023-09-05 (Tue, 05 Sep 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp
    A llvm/test/CodeGen/AArch64/GlobalISel/postlegalizer-lowering-unmerge-ext.mir

  Log Message:
  -----------
  Refactored, added MIR test.


  Commit: bb1a03df47b2efe6c60fd7fa510b9e77109a9236
      https://github.com/llvm/llvm-project/commit/bb1a03df47b2efe6c60fd7fa510b9e77109a9236
  Author: Vladislav Dzhidzhoev <vdzhidzhoev at accesssoftek.com>
  Date:   2023-09-05 (Tue, 05 Sep 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp

  Log Message:
  -----------
  Addressed @aemerson comments


Compare: https://github.com/llvm/llvm-project/compare/d0e6fd99aa95...bb1a03df47b2