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speed up equivalence check for LTL formulas

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With this patch reduc.test goes from 4:57 down to 4:06 on my laptop.

* spot/tl/contain.cc (equal): Use are_isomorphic() before testing
for containment.
* spot/twaalgos/are_isomorphic.hh, spot/twaalgos/are_isomorphic.cc:
(are_isomorphic): New static method.
This commit is contained in:
Alexandre Duret-Lutz 2015-12-09 17:57:34 +01:00
parent 2e15ed959d
commit 679be1d727
3 changed files with 39 additions and 14 deletions
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7
spot/tl/contain.cc
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@ -24,6 +24,7 @@
#include <spot/tl/simplify.hh>
#include <spot/tl/formula.hh>
#include <spot/twaalgos/product.hh>
#include <spot/twaalgos/are_isomorphic.hh>
namespace spot
{
@ -104,6 +105,12 @@ namespace spot
bool
language_containment_checker::equal(formula l, formula g)
{
if (l == g)
return true;
record_* rl = register_formula_(l);
record_* rg = register_formula_(g);
if (isomorphism_checker::are_isomorphic(rl->translation, rg->translation))
return true;
return contained(l, g) && contained(g, l);
}