[Bug target/33135] [SH] -ffinite-math-only should not be on by default

["olegendo at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33135

--- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> 2012-07-16 20:50:50 UTC ---
(In reply to comment #3)

> I guess that the better default would be -mno-ieee for bare metals

Hm ... Is there a particular reason to distinguish between linux and non-linux?

I was actually thinking of tying -mno-ieee to -ffinite-math-only in the
following way:

no options                -> implicit -fno-finite-math-only -mieee
-ffinite-math-only        -> disable ieee fcmp, allow other optimizations
-ffinite-math-only -mieee -> enable ieee fcmp, allow other optimizations
-mno-ieee                 -> disable ieee fcmp, disallow other optimizations 

I think if faster FPU code is desired, most likely the -ffast-math (or some
sub-option like -ffinite-math-only) will be consulted in the first place.  In
case of bare metal configurations, users will probably tweak their specific
options.
Thus, I did not want to distinguish between linux or non-linux here.