[GIT-PULLS] [php-src] PR #23128: Optimize str_repeat

[email protected] (divinity76)
Newsgroups php.git-pulls
Message-ID <[email protected]> 
Pull Request: https://github.com/php/php-src/pull/23128
Author: divinity76

The memmove got me thinking "can src and dst actually overlap?", and it turns out no:
- e always points to populated data + 1
- l may reach the end of populated data, but will never exceed it

memcpy is safe here, and faster (unless the compiler already spotted it in an optimization pass and replaced it internally, entirely possible)
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