RFC: Remove flags -fmove-all-movables and -freduce-all-givs.

[Toon Moene]

L.S.,

The flags mentioned in the subject were introduced seven years ago to 
help the heuristics in loop.c in case of code commonly encountered in 
Fortran.

Because loop.c is on its way out and current loop optimizations have a 
different structure, there's little reason to keep these flags.

On the contrary, now that we have decided that 4.0.0 is a nice round 
version number, perhaps we can get away with such a change.

The proposed patch is attached.

Please, reflect.

-- 
Toon Moene - e-mail: toon@moene.indiv.nluug.nl - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
A maintainer of GNU Fortran 95: http://gcc.gnu.org/fortran/
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