Optimisation question/suggestion

[Jeffrey A Law]

  In message < 34BCE9BB.51530F1B@ensimag.imag.fr >you write:
  > I don't know if that's easy to do, but that would be really great:
  > making 3 or 4 versions of the loops acording to condition inside...
  > I don't have for the moment enough time to dig into gcc and understand
  > how it works to implement this, so I let this a suggestion...
It's classic unswitching.  It's definitely something we'd like to do.
Of course contributions help speed that process up :-)

jeff