[all-commits] [llvm/llvm-project] 97743b: [SLP][REVEC] Make ShuffleCostEstimator and Shuffle...

[Han-Kuan Chen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 97743b8be86ab96afb26ba93e1876406c1f4d541
      https://github.com/llvm/llvm-project/commit/97743b8be86ab96afb26ba93e1876406c1f4d541
  Author: Han-Kuan Chen <hankuan.chen at sifive.com>
  Date:   2024-08-07 (Wed, 07 Aug 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/revec.ll

  Log Message:
  -----------
  [SLP][REVEC] Make ShuffleCostEstimator and ShuffleInstructionBuilder support vector instructions. (#99499)

1. When REVEC is enabled, we need to expand vector types into scalar
types.
2. When REVEC is enabled, CreateInsertVector (and CreateExtractVector)
is used because the scalar type may be a FixedVectorType.
3. Since the mask indices which are used by processBuildVector expect
the source is scalar type, we need to transform the mask indices into a
form which can be used when REVEC is enabled. The transform is only
called when the mask is really used.



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