[all-commits] [llvm/llvm-project] f70f12: [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: f70f1228035c9610de38e0e376afdacb647c4ad9
      https://github.com/llvm/llvm-project/commit/f70f1228035c9610de38e0e376afdacb647c4ad9
  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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