https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87984
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #3)
> Reopening - please read the testcase in detail. Neither the 'a' nor the 'd'
> input are clobbered in the original code, which uses a temporary ('t') as
> recommended by the docs.
Except a is used twice. Which even though is not very specific in the manual
is also not a support case.
