[Bug middle-end/98429] Some FMA expressions are evaluated less efficiently when -ffast-math is active

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98429

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-01-05
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
          Component|tree-optimization           |middle-end

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This probably asks for a special case during RTL expansion or FMA forming
phase.
In itself this is first canonicalization (the user could have written
x*(1-y) which should also expand to FMA I suppose).