[all-commits] [llvm/llvm-project] 030829: [SLP]Drop samesign flag if the vector node has red...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 030829a7e53fad0eab9b87b5dd49427e9fb13303
      https://github.com/llvm/llvm-project/commit/030829a7e53fad0eab9b87b5dd49427e9fb13303
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-12-23 (Mon, 23 Dec 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/buildvector-schedule-for-subvector.ll

  Log Message:
  -----------
  [SLP]Drop samesign flag if the vector node has reduced bitwidth

If the operands of the icmp instructions has reduced bitwidth after
MinBitwidth analysis, need to drop samesign flag to preserve correctness
of the transformation.

Fixes #120823



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