lkml.org 
[lkml]   [1998]   [Dec]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: pgcc optimizationss
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Marc Lehmann wrote:
<blockquote TYPE=CITE>Yeah, sure, but mentioning "it works fine with -O6"
makes less-skilled
<br>people use it, with sometimes bad results ;)
<br>&nbsp;</blockquote>
You are right of cource. But everybody has a head on his shoulders to think
with ;-)
<br>I only share information that hopefully can be used for bug fixes.
This list is not for
<br>amateurs ;-))
<blockquote TYPE=CITE>I hope Linus applies bug-fixes, yes ;)</blockquote>
AFAIK Linus thinks&nbsp; egcs guys silently changed some concepts in inline
asm
<br>(clobber list) and now they are blaming the kernel. I can't say who
is right but it's obvious
<br>gcc and pgcc produced different inline asm code. I'm pretty sure they
shouldn't ;-)
<blockquote TYPE=CITE>Optimizations often interact with each other in subtle
ways. Most(!)
<br>of the bugs I find are caused by bugs in egcs that only come
<br>apperent in some later optimization.</blockquote>
I'm afraid i didn't understand this.
<blockquote TYPE=CITE>&nbsp;
<br>But egcs is getting better with each second, it even does hard register
<br>flow analysis now ;)
<p>Lets hope egcs makes a better gcc sooner than later!</blockquote>
Right, I like pgcc and I&nbsp;wish to see it stable.
<pre>--&nbsp;
Petko Manolov - petkan@varel.bg
<A HREF="http://www.varel.bg/~petkan/">http://www.varel.bg/~petkan/</A></pre>
&nbsp;</html>
\
 
 \ /
  Last update: 2005-03-22 13:46    [from the cache]
©2003-2011 Jasper Spaans