-mfused-madd vs -ffp-contract deprication?

[Richard Sandiford]

Richard Henderson <rth@redhat.com> writes:
> On 11/08/2010 02:58 PM, Joseph S. Myers wrote:
>> <http://gcc.gnu.org/ml/gcc-patches/2010-10/msg01884.html>:
>> Existing target options may sometimes be ambiguous as to whether they are 
>> meant to disable instructions that might not be available, or to disable 
>> automatic conversion
>
> It's currently used in:
>
>   xtensa
>   i386
>   s390
>   rs6000
>   mips
>   ia64
>
> Given that MIPS doesn't implement true FMA, MIPS probably should
> match the (plus (mult a b) c) pattern unconditionally (modulo ISA)
> and be done with it.

I think they should still be conditional on TARGET_FUSED_MADD
because of the R8000 case.  If anyone is still using bleeding edge
GCC on R8000, we might as well continue to provide a way for them
to disable the fusing.

Richard