Re: [Tinycc-devel] Re : Re: Re : Some questions regarding of TCC's optimizations.

[Domingo Alvarez Duarte]

Hello Elijah !

I searched the mailing list and found this one 
https://lists.nongnu.org/archive/html/tinycc-devel/2013-10/msg00013.html 
that seems to be the one you describe.

Cheers !

On 4/4/22 20:04, Elijah Stone wrote:
> A while ago, somebody worked on improving the quality of tcc's code 
> generation.  Apparently the resulting code performed similarly to gcc 
> -O0. This was specific to the (32-bit) x86 backend, but feasible to 
> port to others.  I don't have a pointer handy, but you should be able 
> to find it by searching the mailing list archives.
>
> On Mon, 4 Apr 2022, Domingo Alvarez Duarte wrote:
>
> > Hello Brian !
> >
> > I understand what you are saying and based on that TCC basically 
> > doesn't do basically any optmization and based on the basic idea of 
> > search/look through the generated assembly (trough objdump) trying 
> > recognize easy hanging fruits and if finding any and localizing the 
> > generating point add a similar code to the one you described to alter 
> > the generated code instead of modify/replace/remove the already 
> > generated one.
> >
> > Thank you so much for your nice and useful blog post !
> >
> > Cheers !
> >
> > On 4/4/22 18:15, Brian Callahan wrote:
> > > Hello --
> > >
> > > I am on this list, you know :)
> > >
> > > There may well be opportunities in tcc for a peephole optimizer
> > > approach, but I'll caution that each compiler is different and that 
> > > blog
> > > post was examining QBE, so it wouldn't necessarily be a direct 1:1
> > > mapping. QBE does a lot of optimization itself before writing out its
> > > final assembly.
> > >
> > > ~Brian
> > >
> > > On 4/4/2022 10:26 AM, Domingo Alvarez Duarte wrote:
> > > > After reading this https://briancallahan.net/blog/20220330.html and
> > > > using a citation on this list about dumping the ASM generated by TCC
> > > > using objdump maybe we can find patterns on the generated code and
> > > > identify where it's produced and update then.
> > > >
> > > > On 31/3/22 20:16, rempas via Tinycc-devel wrote:
> > > > > 31 Μαρ 2022, 19:35 Από david.koch@libertysurf.fr:
> > > > >
> > > > > > Have a look : https://github.com/adorad/tcc and
> > > > > > https://github.com/adorad/adorad
> > > > > >
> > > > > > ----- Mail d'origine -----
> > > > > > De: rempas via Tinycc-devel <tinycc-devel@nongnu.org>
> > > > > > À: Tinycc Devel <tinycc-devel@nongnu.org>
> > > > > > Cc: rempas@tutanota.com, Tinycc Devel <tinycc-devel@nongnu.org>
> > > > > > Envoyé: Tue, 29 Mar 2022 21:12:37 +0200 (CEST)
> > > > > > Objet: Re: [Tinycc-devel]  Re :  Some questions regarding of TCC's
> > > > > > optimizations.
> > > > > Thanks a lot! I will look at it!
> > > > >
> > > > >
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