[llvm] [RemoveDIs][DebugInfo] Correctly visit DPValues in StackInfoBuilder::visit (PR #81247)

[Jeremy Morse via llvm-commits]

jmorse wrote:

LGTM, but could we get a regression test too to prevent this from happening in the future? Should be achievable either by inserting a lifetime intrinsic into an existing test, or duplicating an existing function.

https://github.com/llvm/llvm-project/pull/81247