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.k...@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: rem...@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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