Re: dumping the tree

Jaroslav Sýkora wrote:
> Hello,
> I am working on a research project in which I want to export a whole
> syntax/semantic tree of a c++ program from the compiler. My current
> solution is to use the -fdump-tree-all option and take the *.t00.tu
> files (translation unit dump). I've hacked the gcc/tree-dump.c so the
> exported graph is in a machine-readable xml file.
> This all works quite well in gcc 4.1.0. But I've hit a problem with
> gcc 4.2 and newer - the dump now doesn't contain any function bodies.
> Specificaly, in tree-dump.c::dequeue_and_dump() there is
> case FUNCTION_DECL:
>     ...
>     dump_child ("body", DECL_SAVED_TREE (t));
> where 't' points to the FUNCTION_DECL tree. It seems that
> DECL_SAVED_TREE(t) is always NULL in gcc >= 4.2.
> Practically I am only interested in the gimple cfg and its basic
> blocks, which I used to get via DECL_STRUCT_FUNCTION(t) - but that
> doesn't work now either. Working copy of my patches is available for
> your reference at http://necago.ic.cz/prj/scc/
>
We support this sort of thing in Mozilla's Treehydra gcc plugin. See
http://developer.mozilla.org/en/docs/Treehydra

In addition to cfg you can get much other stuff such as types.

Taras