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Date: Tue, 18 Sep 2001 14:02:01 +0200
To: djgpp-workers AT delorie DOT com
From: Pierre Muller <muller AT cerbere DOT u-strasbg DOT fr>
Subject: Re: GCC 2.9x and 3.x produces larger code
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At 13:43 18/09/01 , vous avez écrit:
> > Date: Tue, 18 Sep 2001 11:24:42 +0300 (WET)
> > From: Andris Pavenis <pavenis AT lanet DOT lv>
> >
> > I think one of the reasons is code and data alignment. For example
> > gcc-3.0.1 Linux to DJGPP cross-compiler generates:
> >       '.p2align 4' before procedure code
> >       '.p2align 4,,7' in some other places inside procedure (like
> >               before then begin of loop)
>
>I don't think so: in two object files I compared (after "objdump -d"),
>I counted only 269 nop instructions, which is 269 bytes.  That object
>file was 1.5KB larger when compiled with GCC 3.0.1.
But if the align size is more than one,
I don't think that gcc uses nop to align,
there are better (faster instructions) ways to do this...


Pierre Muller
Institut Charles Sadron
6,rue Boussingault
F 67083 STRASBOURG CEDEX (France)
mailto:muller AT ics DOT u-strasbg DOT fr
Phone : (33)-3-88-41-40-07  Fax : (33)-3-88-41-40-99