[all-commits] [llvm/llvm-project] 2a50da: [RISCV][TTI]Fix the cost estimation for long selec...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2a50dac9fb034a39ace861f7feb60c43ba23e53c
      https://github.com/llvm/llvm-project/commit/2a50dac9fb034a39ace861f7feb60c43ba23e53c
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-08-26 (Mon, 26 Aug 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
    A llvm/test/Transforms/SLPVectorizer/RISCV/long-mask-split.ll

  Log Message:
  -----------
  [RISCV][TTI]Fix the cost estimation for long select shuffle.

The code was broken completely. Need to iterate over the whole mask and
process the submasks correctly, check if they form full indentity and
adjust indices correctly.

Fixes https://github.com/llvm/llvm-project/issues/106126



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