[all-commits] [llvm/llvm-project] 69b39e: [SelectionDAG] Add support for extending masked lo...

David Sherwood via All-commits all-commits at lists.llvm.org
Mon Nov 11 01:18:11 PST 2024


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 69b39e7cc7ace46ebffd8077820b29fe0768b5d9
      https://github.com/llvm/llvm-project/commit/69b39e7cc7ace46ebffd8077820b29fe0768b5d9
  Author: David Sherwood <david.sherwood at arm.com>
  Date:   2024-11-11 (Mon, 11 Nov 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/AArch64/sve-hadd.ll

  Log Message:
  -----------
  [SelectionDAG] Add support for extending masked loads in computeKnownBits (#115450)

We already support computing known bits for extending loads, but not for
masked loads. For now I've only added support for zero-extends because
that's the only thing currently tested. Even when the passthru value is
poison we still know the top X bits are zero.



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