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Re: A few little loop.c cleanup patches
Michael Hayes wrote:
> 5. For each loop level (starting with innermost loops).
>
> 5.1 Perform global lifetime analysis.
>
> 5.2 Perform loop invariant code motion.
>
> 5.3 Perform local lifetime analysis if register references moved.
>
> 5.4 Find induction variables.
>
> 5.5 Perform loop inversion optimizations.
>
> 5.6 Perform strength reduction of induction variables.
>
> 5.7 Perform induction variable elimination.
>
> 5.8 Perform local lifetime analysis if register references moved.
>
> 5.9 Perform loop unrolling.
This performs loop unrolling after induction variable magic. Are you
sure that's the "right" (i.e. most profitable) order ?
[ It is the way it is now, but Jan Hubicka told us a few months ago
he had a patch to turn this order around ]
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