[libcxx-commits] [libcxx] [libc++] Optimize num_get integral functions (PR #121795)

[Alexander Kornienko via libcxx-commits]

alexfh wrote:

Hi @philnik777, this seems to affect user-visible behavior of libc++. I don't know what exactly, but we've root-caused numerous test failures to this commit. From a brief look this might require some debugging to find the problem, so I'd appreciate any pointers at what we should be looking for in the affected tests/binaries. Assuming this change is correct, do you know any specific types of UB that the user code could depend on with regard to this function?
Thanks!

https://github.com/llvm/llvm-project/pull/121795