[all-commits] [llvm/llvm-project] a61252: [SLP]Fix the cost of the reduction result to the f...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a61252419779a6d4a5ebf71e7e2fc4adc75cfddd
      https://github.com/llvm/llvm-project/commit/a61252419779a6d4a5ebf71e7e2fc4adc75cfddd
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-04-07 (Sun, 07 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/RISCV/reductions.ll
    M llvm/test/Transforms/SLPVectorizer/X86/minbitwidth-drop-wrapping-flags.ll
    M llvm/test/Transforms/SLPVectorizer/X86/minbitwidth-transformed-operand.ll

  Log Message:
  -----------
  [SLP]Fix the cost of the reduction result to the final type.

Need to fix the way the cost is calculated, otherwise wrong cast opcode
can be selected and lead to the over-optimistic vector cost. Plus, need
to take into account reduction type size.

Reviewers: RKSimon

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/87528



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