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

>> Err - if this patch doesn't make a difference what critical bug
>> does it fix to support backporting to 4.4?
> 
> What makes you think it does not make a difference?

Well, I had placed in my list

    + no code difference at -O2 before and after the patch (not tested
      except on the PR testcase), giving more confidence in backporting

but...

> Without this
> patch, the compile time in fwprop for PR26854 and similar
> dense-CFG-dense-DU/UD-web test cases is horrible.

... this was of course in the subject.

Paolo
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