[llvm] [BasicAA] Treat returns_twice functions as clobbering unescaped objects (PR #117902)

[Nikita Popov via llvm-commits]

nikic wrote:

@antoniofrighetto GVN should not be using callCapturesBefore(). It should be using BatchAA with EarliestEscapeAnalysis.

https://github.com/llvm/llvm-project/pull/117902