[all-commits] [llvm/llvm-project] 68f97d: LiveDebugValues: Fix another crash related to unre...

[Adrian Prantl via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 68f97d2f787507eba56c667585fc31db3c27c469
      https://github.com/llvm/llvm-project/commit/68f97d2f787507eba56c667585fc31db3c27c469
  Author: Adrian Prantl <aprantl at apple.com>
  Date:   2022-08-09 (Tue, 09 Aug 2022)

  Changed paths:
    M llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
    A llvm/test/DebugInfo/MIR/X86/ldv_unreachable_blocks2.mir

  Log Message:
  -----------
  LiveDebugValues: Fix another crash related to unreachable blocks

This is a follow-up patch to D130999. In the test, the MIR contains an
unreachable MBB but the code attempts to look it up in MLocs. This
patch fixes this issue by checking for the default-constructed value.

rdar://97226240

Differential Revision: https://reviews.llvm.org/D131453