[M3devel] [M3commit] CVS Update: cm3

[Jay K]

 > Functions that call setjmp 


I meant -- functions wtih TRY/EXCEPT or TRY/FINALLY. :)

 - Jay

----------------------------------------
> From: jay.krell at cornell.edu
> To: dragisha at m3w.org
> Date: Wed, 6 Jun 2012 09:38:18 +0000
> CC: jkrell at elego.de; m3devel at elegosoft.com
> Subject: Re: [M3devel] [M3commit] CVS Update: cm3
>
>
> 5.8.6 does allow many optimizations to occur.
> We turn off a very small number directly.
> Functions that call setjmp have optimizations inhibited by declaring all locals volatile.
> We don't give the compiler good type information, and we take the address of stuff more than necessary, by
> generating very low level code.
> Where you have e.g.
> MODULE Foo;
> TYPE Point =  RECORD x,y:INTEGER END;
> PROCEDURE GetY(VAR pt:Point):INTEGER = BEGIN RETURN pt.y; END GetY;
>
>
> We generate the equivalent of:
>
>
> typedef ptrdiff_t INTEGER;
> typedef char* ADDRESS;
> INTEGER Foo_GetY(ADDRESS pt) { return *(INTEGER*)(pt + sizeof(INTEGER)); }
>
>
> Maybe I'll wrap up 4.6, not enable it, and move on to 4.7..
>
>
>
>  - Jay
>
>
> ________________________________
> > Subject: Re: [M3devel] [M3commit] CVS Update: cm3
> > From: dragisha at m3w.org
> > Date: Wed, 6 Jun 2012 10:51:33 +0200
> > CC: jkrell at elego.de; m3devel at elegosoft.com
> > To: jay.krell at cornell.edu
> >
> > I am using it, and I need it.
> >
> > Does it run better/faster? I didn't test, but is it something to even
> > ask, these days, architectures, … ?
> >
> > Only if you turned everything off in 5.8.6 and later, as you'r doing it
> > now, then probably my "-O2" default it is of no benefit at all :).
> >
> > Generally, our "pitch" to "sell"
> > super-modern-ultra-blast-mega-fast-superlative-OO and everything else
> > you only dreamed about… And add "no CPU optimizations"… Imagine that.
> >
> > On Jun 6, 2012, at 10:10 AM, Jay K wrote:
> >
> > 7) Do folks out there really use the Modula-3/gcc optimizer, and notice
> > it produces code that runs much faster?
> >
>