[PATCH] D150707: [DebugInfo] Handle undefined values for DBG_PHIs in InstrRef-LiveDebugValues

[Stephen Tozer via Phabricator via llvm-commits]

StephenTozer updated this revision to Diff 523392.
StephenTozer added a comment.

It looks as though when the DBG_INSTR_REF is in the non-directly-reachable block, even when it is in the same block as the DBG_PHI, we give it a `$noreg` value after LDV. I've left this in the test with a FIXME comment describing the situation; although it's a niche case, I think it's worth keeping it in the test as a potential future fixup, WDYT?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D150707/new/

https://reviews.llvm.org/D150707

Files:
  llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
  llvm/test/DebugInfo/X86/instr-ref-unreachable.mir

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