tree b3bdb1a9bc9c848cbfd7162394e5e944854d5f1a
parent 504a67abb818c55f7d6dd1ab376b5899009b37e7
author Cheng Wang <chennngwang@gmail.com> 1630811374 +0800
committer Copybara-Service <copybara-worker@google.com> 1631264043 -0700

[libc] Some clean work with memmove.

- Replace `move_byte_forward()` with `memcpy`. In `memcpy` implementation,
it copies bytes forward from beginning to end. Otherwise, `memmove` unit
tests will break.
- Make `memmove` unit tests work.

Reviewed By: gchatelet

Differential Revision: https://reviews.llvm.org/D109316

GitOrigin-RevId: b659b789c03ac339e28d7b91406b67bb887a426d