[all-commits] [llvm/llvm-project] 94a77e: [AArch64][GlobalISel] Guard against no operands in...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 94a77ebe240eb7dff7c5d645fc7f60cce049783f
      https://github.com/llvm/llvm-project/commit/94a77ebe240eb7dff7c5d645fc7f60cce049783f
  Author: David Green <david.green at arm.com>
  Date:   2024-12-13 (Fri, 13 Dec 2024)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-hoist-same-hands.mir

  Log Message:
  -----------
  [AArch64][GlobalISel] Guard against no operands in matchHoistLogicOpWithSameOpcodeHands

In case both LeftHandInst and RightHandInst are IMPLICIT_DEF with no input
operands, this patch protects against the post-legalizer-combiner
matchHoistLogicOpWithSameOpcodeHands with no operands. The
prelegalizercombiner-hoist-same-hands.mir test was cleaned up a little in the
process, and has a post-legalizer run line added so that the implicit_def do
not get folded awwy.



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