https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108697

--- Comment #6 from Andrew Macleod <amacleod at redhat dot com> ---
(In reply to Aldy Hernandez from comment #5)
> (In reply to Richard Biener from comment #3)
> > But yes, your observation about m_has_cache_entry is correct - if that has
> > any value (it makes reset_path "cheap"), then it should be also relied on
> > upon
> > growth.  Maybe make this bitmap an optional feature of the cache itself
> > and handle it transparently there?
> 
> BTW, if putting the bitmap in the ssa_global_cache itself works, that's fine
> as well, especially if it makes the ranger's cache faster :).

FYI, I have a prototype to do this... I'm just looking at whether it is better
to integrate it in the class, or derive it from a performance point of view. 
results soon.

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