[PATCH] D140990: [DebugInfo] Treat empty metadata operands the same as undef operands in SelectionDAG

[Orlando Cazalet-Hyams via Phabricator via llvm-commits]

Orlando created this revision.
Orlando added reviewers: scott.linder, StephenTozer, jmorse, jryans.
Orlando added a project: debug-info.
Herald added a subscriber: hiraditya.
Herald added a project: All.
Orlando requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

Without this patch SelectionDAG silently drops dbg.values using `!{}` operands.

Related to https://discourse.llvm.org/t/auto-undef-debug-uses-of-a-deleted-value


https://reviews.llvm.org/D140990

Files:
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
  llvm/test/DebugInfo/X86/dbg-empty-metadata-lowering.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D140990.486281.patch
Type: text/x-patch
Size: 4941 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20230104/d413c742/attachment.bin>