[all-commits] [llvm/llvm-project] 6b1d13: [SLP]Fix PR101213: Reuse extractelement, only if i...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6b1d13761ac0c9857763e5f4c0ae554f076dd9b7
      https://github.com/llvm/llvm-project/commit/6b1d13761ac0c9857763e5f4c0ae554f076dd9b7
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-07-30 (Tue, 30 Jul 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    A llvm/test/Transforms/SLPVectorizer/X86/extract-vectorized-operand.ll

  Log Message:
  -----------
  [SLP]Fix PR101213: Reuse extractelement, only if its vector operand comes before new vector value.

When trying to reuse extractelement instruction, need to check that it
is inserted into proper position. Its original vector operand should
come before new vector value, otherwise new extractelement instruction
must be generated.

Fixes https://github.com/llvm/llvm-project/issues/101213



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