[libcxx-commits] [libcxx] [libc++] Memoise `size()` in `vector::__assign_with_size` (PR #180288)

[Louis Dionne via libcxx-commits]

ldionne wrote:

The intent here is mainly to reduce the diff in the size-based vector patch, with this refactoring that is quite obviously good. I totally understand your point that something else may yield more benefits and we should look into it, but I don't want to block this simple diff-extraction on something exploratory. I'll create a github issue so we can have a look into `__builtin_assume_separate_storage` separately.

https://github.com/llvm/llvm-project/pull/180288