Matt Davis <mattdav...@gmail.com> writes: > I am creating a few functions at compile time, via a gcc plugin. I create the > functions and their bodies, and insert them into the call graph. This is all > done before "cgraph_finalize_compilation_unit()" has been called. I then have > another compiler pass, which gets started after the SSA representation has > been > generated, and it is this pass that uses the functions created previously, in > the much earlier pass. The problem is that by the time the created functions > are used, the cgraph has already removed those nodes since they are disjoint. > I > tried creating and modifying the functions in the same pass, but that was not > successful either. I did not see any flag I could set in the cgraph nodes, > which are created in the first pass I mentioned preventing them from being > removed. Is there a way I can keep those nodes around so the functions > created > at compile time actually get built?
In effect, you want to give your functions the "used" attribute. If you look at handle_used_attribute in c-family/c-common.c, you will see that you want to set DECL_PRESERVE_P. Ian
