[Bug tree-optimization/61169] [4.6,4.7,4.8,4.9] unnecessarily honors bracket in mathematical statements

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61169

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
You want -ffast-math, or more specificall -fassociative-math.  Re-association
can change FP values which is not allowed and the first expression is
(d * x) * x.