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Re: [PATCH] more PR33928: DIY dataflow in fwprop, to enable it at -O1 and speed it up at -O2


>> Bootstrapped/regtested i686-pc-linux-gnu, checked that the time spent in
>> fwprop even for devilish PR26854 testcases is very small.  Ok for trunk
>> and after a while 4.4?
> 
> Err - if this patch doesn't make a difference what critical bug
> does it fix to support backporting to 4.4?

It makes a difference at -O1, and fixes a performance and memory
regression at -O2.

Paolo


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