Re: Adding log files to gcc dump and adding testcase-rtl

[David Malcolm <dmalcolm@redhat.com>]

On Wed, 2022-05-25 at 16:32 +0530, RICHU NORMAN wrote:
> This is great, thank you so much!

You're welcome.

> I am also looking for support regarding adding instructions for the
> target
> machine.

That's something I've not done (my expertise is mostly in the frontends
and diagnostics).

With that caveat, I believe the official documentation is here:
  https://gcc.gnu.org/onlinedocs/gccint/Machine-Desc.html

FWIW one of my colleagues wrote a series of posts about how to add an
entirely new CPU to the GNU toolchain here (originally called "ggx",
but now "moxie"):
  http://atgreen.github.io/ggx/
though that's from 2008 so might be out-of-date, and covers the whole
toolchain, not just GCC, so might be overwhelming.

Hope this is helpful
Dave


> 
> 
> 
> On Wed, May 25, 2022 at 4:14 PM David Malcolm <dmalcolm@redhat.com>
> wrote:
> 
> > On Wed, 2022-05-25 at 10:25 +0530, RICHU NORMAN wrote:
> > > Hi,
> > > I am a beginner in gcc. I am trying to add an instruction to riscv-
> > > gcc.It
> > > would be helpful could help with a few tips .
> > 
> > Hi Richu - welcome to GCC development.
> > 
> > FWIW I've written a guide for new GCC contributors which you might
> > find
> > helpful:
> >   https://gcc-newbies-guide.readthedocs.io/en/latest/index.html
> > 
> > Caveat: I'm much more familiar with the frontends/diagnostics, rather
> > than the backends/RTL, so there may be a "frontend" bias in that
> > guide.
> > 
> > > 1.How to write comments to rtl or create a custom log file to log
> > > comments
> > > to rtl dump?
> > > 2.How to run testsuite ?
> > > 3.Is there a way to directly run an rtl test case? Like giving rtl
> > > input
> > > and checking the generated asm.(Like in the attachment which is
> > > posted in
> > > bugzilla[ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82815 ])
> > > Please suggest a way to run the gcc-testsuite with these cases. Pfa
> > 
> > I wrote some notes on dealing with the testsuite, and on running
> > individual cases here:
> > 
> >  
> > https://gcc-newbies-guide.readthedocs.io/en/latest/working-with-the-testsuite.html
> > 
> > Hope this is helpful; good luck
> > Dave
> > 
> > 
>