Re: Load and parse RTL from textual dump files

[Kyrill Tkachov <kyrylo dot tkachov at foss dot arm dot com>]

Hi,

On 18/12/17 10:30, HEBBAL Yacine wrote:
> Hello,
> In one of my projects, I need to determine automatically what are the 
> names
> and types of data fields manipulated by functions in binary code of a 
> given
> program (e.g. Linux kernel).
> I found that RTL dumps contains most of information I need in a form very
> close to the one of the binary code.
> For this end, I need to parse generated RTL expressions in order to 
> extract
> operands properties.
> Is it possible to load and parse RTL expressions from textual dump files
> using existing code in GCC ? Thanks

Since version 7 GCC does contain functionality to parse RTL input.
This is mostly used for writing more targeted unit tests for the RTL passes.
Have a look at https://gcc.gnu.org/onlinedocs/gccint/RTL-Tests.html or 
grep for "__RTL"
in the gcc testsuite (gcc/testsuite in the source tree) to see examples 
of how it's used.

Not sure how useful it will be for large-scale analysis of source code 
though.
You may want to write/use a GCC plugin for that.

Kyrill

P.S. This list is used for discussions about the development of GCC itself.
For help using GCC please use the gcc-help list in the future.