Re: [patch 00/2] improve .text size on gcc 4.0 and newer compilers

[Daniel Jacobowitz]

On Mon, Jan 02, 2006 at 10:23:35PM +0000, Russell King wrote:
> On Mon, Jan 02, 2006 at 07:51:32PM +0100, Arjan van de Ven wrote:
> > On Mon, 2006-01-02 at 19:44 +0100, Krzysztof Halasa wrote:
> > > Ingo Molnar <mingo@xxxxxxx> writes:
> > > 
> > > > what is the 'deeper problem'? I believe it is a combination of two 
> > > > (well-known) things:
> > > >
> > > >   1) people add 'inline' too easily
> > > >   2) we default to 'always inline'
> > > 
> > > For example, I add "inline" for static functions which are only called
> > > from one place.
> > 
> > you know what? gcc inlines those automatic even without you typing
> > "inline". (esp if you have unit-at-a-time enabled)
> 
> Rubbish it will.
> 
> static void fn1(void *f)
> {
> }
> 
> void fn2(void *f)
> {
>         fn1(f);
> }
> 
> on ARM produces:

On 3.4, 4.0, and 4.1 you only need -O for this (I just checked both x86
and ARM compilers).  I believe this came in with unit-at-a-time, as
Arjan said - which was GCC 3.4.

-- 
Daniel Jacobowitz
CodeSourcery
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/