[all-commits] [llvm/llvm-project] 1afb42: [InstCombine] Let shrinkSplatShuffle act on vector...

[Adar Dagan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1afb42bc10efcf033c1e8b0fda90d1e2956002fa
      https://github.com/llvm/llvm-project/commit/1afb42bc10efcf033c1e8b0fda90d1e2956002fa
  Author: Adar Dagan <101581112+Adar-Dagan at users.noreply.github.com>
  Date:   2025-07-28 (Mon, 28 Jul 2025)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
    M llvm/test/Transforms/InstCombine/trunc-inseltpoison.ll
    M llvm/test/Transforms/InstCombine/trunc.ll

  Log Message:
  -----------
  [InstCombine] Let shrinkSplatShuffle act on vectors of different lengths (#148593)

shrinkSplatShuffle in InstCombine would only move truncs up through
shuffles if those shuffles inputs had the exact same type as their
output, this PR weakens this constraint to only requiring that the
scalar type of the input and output match.



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