[all-commits] [llvm/llvm-project] f1ee27: [SLP]Fix a crash when insert subvector is out of r...

[Andrew V. Tischenko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f1ee2738b3d70fea803ac1f3401c2fc9f61e514a
      https://github.com/llvm/llvm-project/commit/f1ee2738b3d70fea803ac1f3401c2fc9f61e514a
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2022-06-21 (Tue, 21 Jun 2022)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    A llvm/test/Transforms/SLPVectorizer/AArch64/buildvector-vectorize.ll

  Log Message:
  -----------
  [SLP]Fix a crash when insert subvector is out of range.

If the OffsetBeg + InsertVecSz is greater than VecSz, need to estimate
the cost as shuffle of 2 vector, not as insert of subvector. Otherwise,
the inserted subvector is out of range and compiler may crash.

Differential Revision: https://reviews.llvm.org/D128071