Should -fcross-jumping be part of -O1?

[Felix Lee]

Jan Hubicka <hubicka@ucw.cz>:
> The idea of -Odebug is more foggy, so perhaps we can discuss it in
> separate.  I will happilly make -Ospeed/-Ofast, -Osize, -Obalanced
> patch if we have consensus here :)

howabout -O[goal], as in
  -Onone (-O0)
  -Oquickly (-O1)
  -Ofast (-O3)
  -Osmall (-Os)
  -Obalanced (-O2)

and add -Oconfusing to turn on optimizations that will make
debugging/understanding harder.
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