[Bug d/97843] Bad code gen when concatenating to array

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97843

--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Alex from comment #2)
> I agree that the order of evaluation of operands is undefined and writing
> code that depends on that order would not be reliable. In this case it's the
> execution of the assign expression happening before all the operands have
> been evaluated that is the problem.
> 

Yes, it certainly is the most surprising outcome of all that could happen, but
it's mostly down to how the run-time library helpers are implemented, which may
get different results on non-x86.