[all-commits] [llvm/llvm-project] 4c2e01: [GlobalISel] Fix a combine causing DBG_VALUE with ...

[Amara Emerson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4c2e01232cfc397a438eab57a8f9e3a849a6e9f1
      https://github.com/llvm/llvm-project/commit/4c2e01232cfc397a438eab57a8f9e3a849a6e9f1
  Author: Amara Emerson <amara at apple.com>
  Date:   2021-08-07 (Sat, 07 Aug 2021)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    A llvm/test/CodeGen/AArch64/GlobalISel/combine-shift-of-shifted-dbg-value-fallback.ll

  Log Message:
  -----------
  [GlobalISel] Fix a combine causing DBG_VALUE with dangling vregs.

We should use MachineInstr::eraseFromParentAndMarkDBGValuesForRemoval()
instead of eraseFromParent().

We should probably use that in other places too but fix this issue which
affects clang bootstrap builds for now.