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Re: [dataflow] [RFC] Remove many almost useless DCE passes
Paolo Bonzini wrote:
>> I know for example that your cfgcleanup.c changes (which are not
>> properly documented in the ChangeLog, btw) will cause us to miss many
>> optimizations (in particular, crossjumping -- we already have PRs
>> showing this is a problem on the dataflow branch).
>>
>> I'd also think that we have to be careful that we do not make it too
>> hard for ourselves to re-order RTL passes and to interpret dump files.
>> Both are harder with your approach. I'd be perfectly happy to
>> sacrifice 0.5% of compile time for a more/easier maintainable
>> compiler.
>
> Agreed. As I said, I just wanted to find a lower limit, and to
> understand whether pruning DCE passes is the way to go for the
> immediate goal of getting below the 5% mark set by the SC.
>
> Paolo
i think that the more maintainable .5% goal is where we should aim.
kenny