Date: Mon, 5 Apr 1999 22:52:32 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Alex Zepeda <garbanzo@hooked.net> Cc: current@FreeBSD.ORG Subject: Re: EGCS optimizations Message-ID: <199904060552.WAA04470@apollo.backplane.com> References: <Pine.BSF.4.05.9904052235060.55808-100000@zippy.dyn.ml.org>
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:On Mon, 5 Apr 1999, Matthew Dillon wrote:
:
:> There is nothing beyond -O2. Well, there's -O3, which tries to
:> inline static functions, but that typically isn't beneficial because
:> it really bloats up the code and subroutine calls on intel cpus are
:> very fast.
:
:Really?
:
:The pgcc web page (goof.com/pcg) lead me to believe that there were a few
:more optimizations turned on by -O5 && -O6..
:
:- alex
pgcc != egcs. PGcc is a patchset on top of egcs and I suppose they might
have added additinoal -O options, but egcs itself does not go beyond -O3.
The PGcc faq indicates that they are slowly folding their stuff into
egcs. Hopefully they've fixed the bugs :-). I have not tried compiling
a kernel under pgcc but now that FreeBSD has moved to EGCS, it may actually
work!
-Matt
Matthew Dillon
<dillon@backplane.com>
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