[Bug middle-end/116891] [12/13/14/15 Regression] invalid optimization of -fma(-x,x,-z) when -03 and -frounding-math are used

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116891

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Walter Mascarenhas from comment #6)
> Hi Andrew,
> 
>    The proper optimization in this case would be to use the instruction
> vfnmsub132pd followed by a change of sign. It could be something like


That is exactly what I Said just using internals of gcc.

Note bugzilla is usually a mix of both user facing information and internals of
what needs to be done inside gcc.