[Bug middle-end/32667] block copy with exact overlap is expanded as memcpy

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32667

--- Comment #33 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 23 Nov 2023, fw at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32667
> 
> --- Comment #32 from Florian Weimer <fw at gcc dot gnu.org> ---
> There's this in standards.texi:
> 
> Most of the compiler support routines used by GCC are present in
> @file{libgcc}, but there are a few exceptions.  GCC requires the
> freestanding environment provide @code{memcpy}, @code{memmove},
> @code{memset} and @code{memcmp}.
> Finally, if @code{__builtin_trap} is used, and the target does
> not implement the @code{trap} pattern, then GCC emits a call
> to @code{abort}.
> 
> Maybe that would be a place to mention this issue, too?

Will add.