On Fri, Sep 16, 2011 at 1:37 PM, Diego Novillo <dnovi...@google.com> wrote: > However, you could try an approach similar to what Le-Chun implemented for > -Wself-assign (which only exists in the google/main branch for now). See > EXPR_FOLDED in http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01898.html.
Hm, I don't see how exactly this would solve my problem... The issue I am facing is that references to necessary header files are optimized away. Just knowing that an expression has been folded doesn't help me... :-( What I had in mind was to only keep additional copies of the original subtrees if the node has been replaced completely by folding. I don't see why memory consumption would go through the roof that way, this would mean that a very high percentage of the code can be folded and shrinked significantly which shouldn't be true in the general case. Of course I see that it can be difficult to implement this, it might require changes to every folding function. Is there any function that I could create a hook for which still sees an unfolded expression? Thanks, Joachim
