[all-commits] [llvm/llvm-project] e91e1d: [GlobalISel][Localizer] Enable intra-block localiz...

[AE via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: e91e1df6ab74006e96b0cca94192e935542705a4
      https://github.com/llvm/llvm-project/commit/e91e1df6ab74006e96b0cca94192e935542705a4
  Author: Amara Emerson <aemerson at apple.com>
  Date:   2020-03-03 (Tue, 03 Mar 2020)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/Localizer.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/localizer-arm64-tti.ll
    M llvm/test/CodeGen/AArch64/GlobalISel/localizer.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/swifterror.ll
    M llvm/test/CodeGen/AArch64/GlobalISel/translate-constant-dag.ll
    M llvm/test/CodeGen/AArch64/tail-call.ll
    M llvm/test/CodeGen/AArch64/tiny_model.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/constant-bus-restriction.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/extractelement.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/insertelement.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/mubuf-global.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-amdgcn.s.buffer.load.ll

  Log Message:
  -----------
  [GlobalISel][Localizer] Enable intra-block localization of already-local uses.

This changes the localizer to attempt intra-block localizer of instructions
that have local uses. This is useful because sometimes the entry block itself
has many uses of constant-like instructions, which would benefit from shortening
live ranges. Previously if an inst had no non-local uses, we wouldn't add it to
the list of instructions to attempt further intra-block localization.

This gives a 0.7% geomean code size improvement on CTMark.

Differential Revision: https://reviews.llvm.org/D75555