[baobun]

"Static analysis" should be a relevant search term. Assuming you don't need to tie the instructions back to C code then the "gcc" part seems circumstancial for implementation? I guess you might want to parse the ASM into an Abstract Syntax Tree (AST) represenation and work on that?

If you do want to tie it back to the source, this looks relevant: http://icps.u-strasbg.fr/~pop/gcc-ast.html

[phafu]

For my purpose I don't need to get back to the original source, no.

The gcc part is only relevant with regards to what dialect of assembler I need to parse. If I go that route, I'd write a parser for the GNU assembler, and that would of course work with any code in that dialect, regardless from which compiler it came from (I haven't checked whether other compilers can produce GNU assembler though).