Fix MultiDefPrunedLiveness; add boundaries for dead end blocks. #62939
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Make sure liveness reports a complete boundary even for OSSA lifetimes that are incomplete. Definition blocks can be on the liveness boundary in this case.
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Make sure liveness reports a complete boundary even for OSSA lifetimes that are incomplete. Definition blocks can be on the liveness boundary in this case.
@gottesmm ran into this using liveness for memory locations rather than OSSA values.