On Fri, Aug 11, 2023 at 7:31 PM Aaron Lorey via Gcc <gcc@gcc.gnu.org> wrote:
> Am Mo., 3. Juli 2023 um 02:50 Uhr schrieb Andrew Pinski <pins...@gmail.com > >: > > > > On Sun, Jul 2, 2023 at 5:48 PM Aaron Lorey via Gcc <gcc@gcc.gnu.org> > wrote: > > > > > > Am Mo., 26. Juni 2023 um 20:09 Uhr schrieb David Malcolm < > dmalc...@redhat.com>: > > > > > > > > On Mon, 2023-06-26 at 18:59 +0200, Aaron Lorey via Gcc wrote: > > > > > Hello, > > > > > > > > > > this is the first time I am writing to a mailing list. I've tried > > > > > researching the normal procedure but nothing special seems to be > > > > > required. > > > > > > > > > > I'm currently trying to do a complete graph-discovery of GCC's > symtab > > > > > / > > > > > tree_nodes to dump the full internal representation of the > > > > > compilation > > > > > unit. Gitlab: https://gitlab.com/graph-prog/code-database > > > > > > > > > > It is not exceptionally heavy but also not very easy to serialize > the > > > > > internal state to disk. I think this task was simply not considered > > > > > in the > > > > > design. > > > > > > > > > > Reason for writing to the mailing list are the troubles in > connecting > > > > > the > > > > > TREE_CODE enumeration to the appropriate struct tree_node memory > > > > > layout > > > > > without guessing. > > > > > > > > > > Can you provide a mapping of TREE_CODE to tree_node memory layout? > > > > > > > > I don't know that such a mapping exists directly, but have a look at > > > > the functions "tree_code_size" and "tree_size" defined in > gcc/tree.cc. > > > > > > > > You might also find the LTO streaming code of interest; see gcc/lto- > > > > streamer-{in,out}.cc > > > > > > > > Hope this is helpful > > > > Dave > > > > > > > > > > > > > > Thank you for your reply. > > > > > > The tree_size() and tree_code_size() functions are useful, although > incomplete. > > > > > > If I understand correctly, the link time optimization works on the > > > GIMPLE representation. The original syntax tree and symbol table would > > > be preferable. > > > > You could also look into the module support in the C++ front-end, > > `gcc/cp/module.cc ` which does store out the original trees and such. > > > > Thanks, > > Andrew > > > > > > > > Andrew's suggestion might be more what I'm looking for. > > I've now managed to dump the syntax tree of the compilation unit > (tree_function_decl.saved_tree -> tree_exp.operands -> > tree_statement_list.nodes). Thank you very much for the help! > > In order to print out the original code, I need to know which program > code was translated to the individual nodes. Is there a chance to get > the original tokens (or the offsets in the program code file) per > tree_node without modifying the parser? > Generally we try to track the corresponding source location for a lot of things and attach them to the relevant tree nodes (EXPR_LOCATION, DECL_SOURCE_LOCATION). In many cases there is a lot of room for improvement in this. For instance, for a class, instead of just storing the location of the name, we could remember the range from the class-key to the closing brace. Jason
