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Re: A visualization of GCC's passes, as a subway map
On Tue, Jul 12, 2011 at 10:55 AM, David Malcolm <dmalcolm@redhat.com> wrote:
> On Tue, 2011-07-12 at 09:15 -0700, Xinliang David Li wrote:
>> FYI. If you just want text dump of gcc passes and their on|off
>> settings, option -fdump-passes can be used. This can be enhanced to
>> dump properties and TODOs.
>
> Thanks!
>
> I got a bit mystified by:
>
> ?$ gcc -fdump-passes test.c
> ?cc1: error: unrecognized command line option ‘-fdump-passes’
>
> but it turns out I'm still stuck on 4.6.0 (though that's a restriction
> I've imposed on myself), and that you added it in 4.7, if I'm reading
> the history right:
> http://gcc.gnu.org/viewcvs?view=revision&revision=174930
>
Right, it is in trunk compiler only.
> FWIW, the analagous python code I used to generate my tables of passes
> is here:
> http://git.fedorahosted.org/git/?p=gcc-python-plugin.git;a=blob;f=generate-tables-of-passes-rst.py
>
> I don't know if it's sane in 4.6 to expose the "is_on" and
> "is_really_on" booleans as (readonly) attributes of the Python gcc.Pass
> objects; there seem to have been a lot of cleanups to that code in 4.7
>
Other related pass related infrastructure changes include
1) -fenable-xxx=<func_ranges>, -fdisable-xxx=<func_ranges> to disable
or enable any gcc passes
2) Removing IR/debug dump as a TODO.
David
> [snip]
>
> Dave
>
>