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Re: calculate_global_regs_live
> It is kind of feature to limit work needed to update liveness, but it is
> broken as it ineed don't have to converge. In the past we always
> somehow papered around.
It indeed appears to be a long-standing problem, that I rediscovered again.
If we can't find a definitive solution, I'll add large comments in the code
so that the next guy doesn't have to go through the same discovery process.
Thanks for the quick response.
> There is patch by Zdenek to ensure finitarity of the propagation that I
> think is best compromise sollution for this problem unless we want to go
> for DJ-graphs based liveness computation that is much more involved and
> can't embedde dead code removal as we do right now.
> http://gcc.gnu.org/ml/gcc-patches/2003-01/msg02059.html
What happened to this patch, Zdenek? Was it even reviewed?
--
Eric Botcazou