[all-commits] [llvm/llvm-project] 120d52: [SLP]Fix PR55653: emit undefs where required, not ...

[Andrew V. Tischenko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 120d52b0ef8b0d41d5ce5898422d2d2f42047d0b
      https://github.com/llvm/llvm-project/commit/120d52b0ef8b0d41d5ce5898422d2d2f42047d0b
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2022-05-26 (Thu, 26 May 2022)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/AArch64/reorder-fmuladd-crash.ll
    M llvm/test/Transforms/SLPVectorizer/SystemZ/pr34619.ll
    M llvm/test/Transforms/SLPVectorizer/X86/horizontal-minmax.ll
    M llvm/test/Transforms/SLPVectorizer/X86/insert-shuffle.ll
    M llvm/test/Transforms/SLPVectorizer/X86/jumbled-load-used-in-phi.ll
    M llvm/test/Transforms/SLPVectorizer/X86/partail.ll
    M llvm/test/Transforms/SLPVectorizer/X86/shrink_after_reorder.ll
    M llvm/test/Transforms/SLPVectorizer/X86/shrink_after_reorder2.ll
    M llvm/test/Transforms/SLPVectorizer/X86/vectorize-reorder-alt-shuffle.ll
    M llvm/test/Transforms/SLPVectorizer/slp-umax-rdx-matcher-crash.ll

  Log Message:
  -----------
  [SLP]Fix PR55653: emit undefs where required, not poison.

Need to handle a corner case correctly, if all elements are Undefs/Poisons,
need to emit actual values, not just poisons.

Differential Revision: https://reviews.llvm.org/D126298