[Bug c++/53226] memory consumption for heavy template instantiations increased massively

[matz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53226

--- Comment #13 from Michael Matz <matz at gcc dot gnu.org> 2012-05-08 13:19:42 UTC ---
(In reply to comment #10)
> The other way is to try to get away without immediately removing propagated
> source stmts - the obvious downside is that transforms relying on
> single-use definitions will be confused by those dead uses

Just for completeness: If we would simply NOP out the to-be-removed statements
that would be taken care of.  Additionally iterator copies to those
non-removed stmts wouldn't break.