• Alexandre Duret-Lutz's avatar
    Replace the hash key construction of LTL formulae by a simple · f2be64dd
    Alexandre Duret-Lutz authored
    counter updated each time we create a new (unique) formula.
    
    Doing so saves a lot of memory during the translation of the
    ltlcounter formulae, because the formulae are quite big and
    storing a string representation of each formula on its node was a
    bad idea.  For instance with n=12, the translation now uses 40MB
    where it used 290MB.  (Note: in both cases, 20MB is being used by
    the BDD cache.)
    
    * src/ltlast/formula.hh (hash_key_): Rename as ...
    (count_): ... this.
    (hash): Adjust.
    (max_count): New static variable to count the number of
    formulae created.
    (formula): Update max_count and set count_.
    (dump): Make it a virtual pure method.
    (set_key_): Remove.
    (formula_ptr_less_than): Speed up and return false when
    the two formula pointer are equal.
    * src/ltlast/formula.cc (set_key_, dump): Remove.
    * src/ltlast/atomic_prop.cc, src/ltlast/atomic_prop.hh,
    src/ltlast/automatop.cc, src/ltlast/automatop.hh,
    src/ltlast/binop.cc, src/ltlast/binop.hh, src/ltlast/constant.cc,
    src/ltlast/constant.hh, src/ltlast/multop.cc,
    src/ltlast/multop.hh, src/ltlast/unop.cc, src/ltlast/unop.hh:
    Empty the constructor (do not precompute the dump_ anymore),
    and add a dump() implementation.
    f2be64dd
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