[PATCH] D147312: [Assignment Tracking][SROA] Handle DIArgList in migrateDebugInfo

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

Orlando created this revision.
Orlando added reviewers: jmorse, StephenTozer, scott.linder.
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If the to-be-split dbg.assign has a `DIArgList` and a new `Value` has been requested then use a kill-location for the new dbg.assign. We can't simply replace the value component (a `DIArgList`) with the new `Value` as that would leave the `DIExpression` in an invalid state (`DW_OP_LLVM_arg` operands with no arglist).

This was tripping an assertion in LiveDebugValues in a self hosted build.


https://reviews.llvm.org/D147312

Files:
  llvm/lib/Transforms/Scalar/SROA.cpp
  llvm/test/DebugInfo/Generic/assignment-tracking/sroa/arglist.ll

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