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Re: [dataflow]: patch committed to improve -O0 performance.


Paolo Bonzini wrote:
> I'm wondering, many passes that use DF_LIVE could actually use
> DF_LR.  If they sum up substantially, DF_UR/DF_LIVE could become
> optional problems.
>
> A nit:
>
>   
They can, but the information is not as precise. 

>> +/* Just run the sub passes which do all of the work.  */
>> +static unsigned int
>> +rest_of_handle_stack_regs (void)
>> +{
>> +  return 0;
>> +}
>>     
>
>   
I did not know how that worked , i will make the change.

kenny
> Just put NULL in the tree_pass structure.
>
> Paolo
>   


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