[clang] [clang] Limit lifetimes of temporaries to the full expression (PR #170517)

[Paul Kirth via cfe-commits]

ilovepi wrote:

This seems to be tickling something in the dfsan tests. I’m not totally sure why. Perhaps with the lifetime in the eh path something can’t be DCEd anymore? I need to investigate if this is a real problem or a missing flag or something in the dfsan test. It’s also odd that only the single test fails. 

https://github.com/llvm/llvm-project/pull/170517