[all-commits] [llvm/llvm-project] c1b911: [SLP]Do correct signedness analysis for clustered ...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c1b911c5798654b9b77746901919b86b3f1fe94c
      https://github.com/llvm/llvm-project/commit/c1b911c5798654b9b77746901919b86b3f1fe94c
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-10-02 (Wed, 02 Oct 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/subvector-minbitwidth-unsigned-value.ll

  Log Message:
  -----------
  [SLP]Do correct signedness analysis for clustered nodes

Should get the signedness info from the original scalar instructions, if
possible, to correctly generate sext/zext instructions. Also, the
clustered node must be assigned a gather node user info to correctly
estimate its bitwidth/sign.



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