[libcxx-commits] [libcxx] [libc++] Simplify vector's emplace_back, __move_range and __construct_at_end functions (PR #120521)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 requested changes to this pull request.

This basically reverts https://reviews.llvm.org/D82111 and https://reviews.llvm.org/D80588, which we shouldn't do unless we can show that the compiler got smarter.

https://github.com/llvm/llvm-project/pull/120521