[all-commits] [llvm/llvm-project] b30adf: [ARM][LowOverheadLoops] Liveouts and reductions

[Sam Parker via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: b30adfb5295eaa894669e62eec627adda8820a43
      https://github.com/llvm/llvm-project/commit/b30adfb5295eaa894669e62eec627adda8820a43
  Author: Sam Parker <sam.parker at arm.com>
  Date:   2020-08-28 (Fri, 28 Aug 2020)

  Changed paths:
    M llvm/include/llvm/CodeGen/ReachingDefAnalysis.h
    M llvm/lib/CodeGen/ReachingDefAnalysis.cpp
    M llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/disjoint-vcmp.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/extract-element.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/no-vpsel-liveout.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/reductions.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/varying-outer-2d-reduction.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/vctp-add-operand-liveout.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/vector-arith-codegen.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/wlstp.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/wrong-vctp-opcode-liveout.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/wrong-vctp-operand-liveout.mir
    M llvm/test/CodeGen/Thumb2/mve-gather-scatter-tailpred.ll
    M llvm/test/CodeGen/Thumb2/mve-pred-vctpvpsel.ll

  Log Message:
  -----------
  [ARM][LowOverheadLoops] Liveouts and reductions

Remove the code that tried to look for reduction patterns, since the
vectorizer and isel can now produce predicated arithmetic instructios
within the loop body. This has required some reorganisation and fixes
around live-out and predication checks, as well as looking for cases
where an input/output is initialised to zero.

Differential Revision: https://reviews.llvm.org/D86613