[all-commits] [llvm/llvm-project] 28ac87: [SLP]Fix gathering of the scalars by not ignoring ...

[cilkplus via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 28ac873bcb319c870522fc7cc8eac96b220f22e4
      https://github.com/llvm/llvm-project/commit/28ac873bcb319c870522fc7cc8eac96b220f22e4
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2021-07-02 (Fri, 02 Jul 2021)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/AArch64/insertelement-inseltpoison.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/insertelement.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/trunc-insertion.ll
    M llvm/test/Transforms/SLPVectorizer/X86/crash_exceed_scheduling.ll
    M llvm/test/Transforms/SLPVectorizer/X86/crash_lencod.ll
    M llvm/test/Transforms/SLPVectorizer/X86/crash_mandeltext.ll
    M llvm/test/Transforms/SLPVectorizer/X86/crash_smallpt.ll
    M llvm/test/Transforms/SLPVectorizer/X86/geps-non-pow-2.ll
    M llvm/test/Transforms/SLPVectorizer/X86/phi3.ll
    M llvm/test/Transforms/SLPVectorizer/X86/phi_landingpad.ll
    M llvm/test/Transforms/SLPVectorizer/X86/pr35497.ll
    M llvm/test/Transforms/SLPVectorizer/X86/reorder_repeated_ops.ll
    M llvm/test/Transforms/SLPVectorizer/X86/shrink_after_reorder.ll
    M llvm/test/Transforms/SLPVectorizer/X86/value-bug-inseltpoison.ll
    M llvm/test/Transforms/SLPVectorizer/X86/value-bug.ll

  Log Message:
  -----------
  [SLP]Fix gathering of the scalars by not ignoring UndefValues.

The compiler should not ignore UndefValue when gathering the scalars,
otherwise the resulting code may be less defined than the original one.
Also, grouped scalars to insert them at first to reduce the analysis in
further passes.

Differential Revision: https://reviews.llvm.org/D105275