On Wed, Sep 2, 2009 at 10:24 PM, Basile STARYNKEVITCH<bas...@starynkevitch.net> wrote: > Richard Guenther wrote: >> >> On Wed, Sep 2, 2009 at 10:06 PM, Basile >> STARYNKEVITCH<bas...@starynkevitch.net> wrote: >>> >>> Hello All, >>> >>> My feeling is that the Link Time Optimisation (LTO) effort should be soon >>> (=is expected to be, or is already) merged inside GCC trunk (future 4.5). >>> >>> Several years ago, I asked if there is any possibility for an additional >>> pass to profit of LTO infrastructure to add some extra data into LTO >>> stuff >>> (which is probably DWARF related inside ELF object files, but I am not >>> sure) >>> and to retrieve it. I remember that the answer was of course not. > > [...] > >>> >>> I could imagine that a plugin might be interested in adding say some >>> information into the object file (when ordinary compilation for LTO of a >>> single compilation unit happens) and later retrieve it (when link time >>> optimisation occur merging several object files.) >>> >>> A dream case example would be a plugin for whole program static analysis. >> >> The IPA pass infrastructure has all the necessary bits for this. > > How do you deal with several compilation units? > > I was thinking LTO is designed for that?
I of course mean the IPA pass infrastructure on the LTO branch. Richard.
