[all-commits] [llvm/llvm-project] 7510f3: [MachineSink] Fix crash due to use-after-free in a...

[Amara Emerson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7510f32f906ab4e583542eae2611b020f88629af
      https://github.com/llvm/llvm-project/commit/7510f32f906ab4e583542eae2611b020f88629af
  Author: Amara Emerson <amara at apple.com>
  Date:   2023-10-06 (Fri, 06 Oct 2023)

  Changed paths:
    M llvm/lib/CodeGen/MachineSink.cpp
    A llvm/test/CodeGen/AArch64/machine-sink-cache-invalidation.ll

  Log Message:
  -----------
  [MachineSink] Fix crash due to use-after-free in a MachineInstr* cache.

After the SinkAndFold optimization was enabled, we saw some crashes with
GISel due to SinkAndFold erasing an MI while a reference was being held in a
cache.