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Re: GCC performance regression - up to 20% ?
- From: Allan Sandfeld Jensen <snowwolf at one2one-networks dot com>
- To: Andrew Pinski <pinskia at physics dot uc dot edu>
- Cc: gcc at gcc dot gnu dot org
- Date: Wed, 24 Apr 2002 23:29:08 +0200
- Subject: Re: GCC performance regression - up to 20% ?
- References: <9D7EA124-565E-11D6-B762-000393122612@physics.uc.edu>
On Tuesday 23 April 2002 04:05, Andrew Pinski wrote:
> On Monday, April 22, 2002, at 09:20 , Carlo Wood wrote:
> > On Mon, Apr 22, 2002 at 08:49:20PM -0400, Andrew Pinski wrote:
> >> And it was -O3 that included the inline optimization.
> >
> > Huh??
> > I am using the fact (I hope) that functions marked with 'inline'
> > or member functions that are defined inside their class declaration
> > are inlined already with -O.
> > Talking about real small functions here (accessors etc).
>
> Read the manual, under the -O3 option:
>
> Optimize yet more. `-O3' turns on all optimizations specified by `-O2'
> and also turns on the `-finline-functions' and `-frename-registers'
> options.
>
That inline is the "inline-optimization", ie. inlining function NOT declared
inline. Functions declared inline are inlined already at -O