[llvm] [InstrProfiling] Don't attempt to create duplicate data variables. (PR #71998)

[via llvm-commits]

zmodem wrote:

> Using the repro I observed another bug where the data variable may not always be created for some inlined functions under certain conditions. I'm testing a fix that I'll put in a separate PR soon.

Can you quickly comment on the impact of that bug? Does it mean the compiler crashes, miscompiles, or loses coverage information?

https://github.com/llvm/llvm-project/pull/71998