Re: Extract function properties

On Wed, 2026-04-08 at 11:47 -0500, soma pal via Gcc wrote:
> Hi ,

Hi Soma

> 
> I am a research scholar working with GCC, and I am interested in
> extracting
> properties of individual functions in a program, especially the hot
> functions identified through profiling. I would like to obtain
> features
> such as function_name, bb_count, loop_count, branch_count,
> call_count,
> load_count, store_count, and instruction_count to use as input for an
> ML
> model.
> 
> Could you please suggest a way to extract this information?

Some possible approaches you could try:

* -fsave-optimization-record will write out a SRCFILE.opt-
record.json.gz with information on optimization, including some of the
information you want (e.g. profile data)

* -fdump-tree-all, -fdump-rtl-all, etc will dump a lot more info,
albeit not necessarily in a readily-consumable form

* in the not-yet-released trunk (gcc 16), -fdiagnostics-add-
output=sarif:cfgs=yes emits a .sarif file containing detailed
information about the CFGs for all functions at the start of each
optimization pass (both for the gimple and RTL intermediate
representations).

* write a plugin that captures exactly the information you need
(perhaps looking at the implementation of the above for inspiration)

Hope this is constructive
Dave