On 05/07/2024 09:59, Richard Biener wrote:
> On Fri, 5 Jul 2024, Alex Coplan wrote:
>
> > Hi,
> >
> > This adds a debug function to dump the dominator tree in dot/graphviz
> > format. The idea is that the function can be called in GDB, the output
> > copy/pasted into a .dot file and then rendered using graphviz.
> >
> > Bootstrapped/regtested on aarch64-linux-gnu, OK for trunk?
>
> Can you follow other APIs here and rename and use a FILE * arg?
>
> DEBUG_FUNCTION void
> dot_dominance_tree (FILE *f, enum cdi_direction dir)
> ...
>
> that way in gdb you can do
>
> (gdb) p fopen ("/tmp/x.dot", "w")
> (gdb) p dot_dominance_tree ($1, CDI_DOMINATORS);
> (gdb0 p fclose ($1);
>
> and then dot the file? It's also easier to use this from a
> gdb python wrapper which can do the above as well. In other
> places there's then an overload with a const char *fname argument
> doing the fopen/fclose itself.
Yes, that sounds much better (it would certainly be more useable in
bigger functions that way). I'll give that a go (including the
convenience overload), thanks.
Alex
>
> Thanks,
> Richard.
>
> > Thanks,
> > Alex
> >
> > gcc/ChangeLog:
> >
> > * dominance.cc (debug_dominance_tree_dot): New.
> >
>
> --
> Richard Biener <[email protected]>
> SUSE Software Solutions Germany GmbH,
> Frankenstrasse 146, 90461 Nuernberg, Germany;
> GF: Ivo Totev, Andrew McDonald, Werner Knoblich; (HRB 36809, AG Nuernberg)
