http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53511

--- Comment #9 from Kazumoto Kojima <kkojima at gcc dot gnu.org> 2012-06-05 
22:35:28 UTC ---
(In reply to comment #7)
> Making -mfused-madd a no-op with special handling will only differ in the (*)
> marked case.  Is this what you had in mind?

Yes.  -mfused-madd is for a micro optimization after all.  It would
be tolerable even if it can't generate fmac insns in the case like (*).
OTOH deleting that option surprises the old programs which use
-mfused-madd.  I have no strong opinion, though.  On second thought,
-mfused-madd would be relatively rare in real use.

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