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

[Steven Bosscher]

On Fri, May 8, 2009 at 11:11 AM, Richard Guenther
<richard.guenther@gmail.com> wrote:
>> 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?

What makes you think it does not make a difference? Without this
patch, the compile time in fwprop for PR26854 and similar
dense-CFG-dense-DU/UD-web test cases is horrible.

Ciao!
Steven