mirror of
https://github.com/Z3Prover/z3
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7ce88d4da9
- remove unused variables and class fields - add support for gcc 4.5 & clang's __builtin_unreachable - fix 2 bugs related to strict aliasing - remove a few unused function parameters Signed-off-by: Nuno Lopes <t-nclaud@microsoft.com>
81 lines
1.7 KiB
C++
81 lines
1.7 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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matcher.cpp
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Abstract:
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<abstract>
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Author:
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Leonardo de Moura (leonardo) 2008-02-02.
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Revision History:
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--*/
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#include"matcher.h"
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bool matcher::operator()(expr * e1, expr * e2, substitution & s) {
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reset();
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m_subst = &s;
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m_todo.push_back(expr_pair(e1, e2));
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while (!m_todo.empty()) {
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expr_pair const & p = m_todo.back();
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// if (m_cache.contains(p)) {
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// m_todo.pop_back();
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// continue;
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// }
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if (is_var(p.first)) {
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expr_offset r;
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if (m_subst->find(to_var(p.first), 0, r)) {
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if (r.get_expr() != p.second)
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return false;
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}
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else {
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m_subst->insert(to_var(p.first), 0, expr_offset(p.second, 1));
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}
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m_todo.pop_back();
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continue;
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}
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if (is_var(p.second))
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return false;
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if (!is_app(p.first))
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return false;
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if (!is_app(p.second))
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return false;
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app * n1 = to_app(p.first);
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app * n2 = to_app(p.second);
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if (n1->get_decl() != n2->get_decl())
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return false;
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unsigned num_args1 = n1->get_num_args();
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if (num_args1 != n2->get_num_args())
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return false;
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m_todo.pop_back();
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if (num_args1 == 0)
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continue;
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// m_cache.insert(p);
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unsigned j = num_args1;
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while (j > 0) {
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--j;
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m_todo.push_back(expr_pair(n1->get_arg(j), n2->get_arg(j)));
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}
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}
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return true;
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}
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void matcher::reset() {
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// m_cache.reset();
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m_todo.reset();
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}
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