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Re: [patch] Rework RTL CFG graph dumping to dump DOT format


On Fri, Nov 23, 2012 at 10:46 AM, Steven Bosscher <stevenb.gcc@gmail.com> wrote:
> Hello,
>
> The graph.[ch] code to dump the CFG for viewing with VCG is quite
> broken and hasn't been updated to follow the advances in the CFG
> infrastructure.
>
> The attached patch is the first in a series of patches I have planned
> to update the CFG-as-graph dumping code to dump GraphViz DOT input
> instead. The attached archive is an example input/output.
>
> There's still quite a lot of work to be done:
> - use pretty-print in the slim RTL dumping
> - move the escaped-string printing into pretty-print
> - make the basic block content dumping a cfghook
> - make these dumps work for GIMPLE also
>
> For the moment, this is a good starting point.
>
> Obviously there are no changes in code generation due to this patch,
> so IMHO this patch (and the rest of the series) should be safe for
> stage3. Hopefully everyone else agrees :-)
>
> Bootstrapped&tested on powerpc64-unknown-linux-gnu. OK for trunk?

Hmm, you are removing an (appearant) abstraction that I didn't know was
there but remember to have asked for in the thread for dumping a late
callgraph for Ada purposes.  Is the abstraction not working or was it simply
a hassle to keep the VCG path working (I don't thjnk I have ever seen a
VCG consumer ... ;)).

Btw, I of course have my own CFG dumper (producing graphviz input)
in my local tree - attached for reference (I'm simply using it from
gdb sessions).

Richard.

> Ciao!
> Steven

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