[all-commits] [llvm/llvm-project] bdd355: [X86] pmulh.ll - add extra test coverage from #109790

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bdd35593059441dd626305ee48a91d19b952189c
      https://github.com/llvm/llvm-project/commit/bdd35593059441dd626305ee48a91d19b952189c
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-09-30 (Mon, 30 Sep 2024)

  Changed paths:
    M llvm/test/CodeGen/X86/pmulh.ll

  Log Message:
  -----------
  [X86] pmulh.ll - add extra test coverage from #109790

Shows poor codegen on AVX512 targets


  Commit: 412d59f0a510a05c08ed45545943dfd2f901bc5d
      https://github.com/llvm/llvm-project/commit/412d59f0a510a05c08ed45545943dfd2f901bc5d
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-09-30 (Mon, 30 Sep 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/test/CodeGen/X86/pmulh.ll

  Log Message:
  -----------
  [DAG] combineShiftToMULH - handle zext nneg as sext

Fixes poor codegen on AVX512 targets for a test case from #109790


Compare: https://github.com/llvm/llvm-project/compare/82e594a022d3...412d59f0a510

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