[all-commits] [llvm/llvm-project] 31cb80: [SanbdoxVec][BottomUpVec] Fix diamond shuffle with...

[vporpo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 31cb807537fa09b3f452ac9f93388ef202f6b4a8
      https://github.com/llvm/llvm-project/commit/31cb807537fa09b3f452ac9f93388ef202f6b4a8
  Author: vporpo <vporpodas at google.com>
  Date:   2025-02-12 (Wed, 12 Feb 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/Legality.cpp
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/Passes/BottomUpVec.cpp
    M llvm/test/Transforms/SandboxVectorizer/bottomup_basic.ll

  Log Message:
  -----------
  [SanbdoxVec][BottomUpVec] Fix diamond shuffle with multiple vector inputs (#126965)

When the operand comes from multiple inputs then we need additional
packing code. When the operands are scalar then we can use a single
InsertElementInst. But when the operands are vectors then we need a
chain of ExtractElementInst and InsertElementInst instructions to insert
the vector value into the destination vector. This is what this patch
implements.



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