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87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
/*++
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Copyright (c) 2008 Microsoft Corporation
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Module Name:
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expr_context_simplifier.h
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Abstract:
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<abstract>
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Author:
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Nikolaj Bjorner (nbjorner) 2008-06-03
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Revision History:
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--*/
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#ifndef _EXPR_CONTEXT_SIMPLIFIER_H_
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#define _EXPR_CONTEXT_SIMPLIFIER_H_
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#include "ast.h"
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#include "obj_hashtable.h"
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#include "basic_simplifier_plugin.h"
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#include "front_end_params.h"
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#include "smt_solver.h"
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#include "arith_decl_plugin.h"
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class expr_context_simplifier {
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typedef obj_map<expr, bool> context_map;
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ast_manager& m_manager;
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arith_util m_arith;
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context_map m_context;
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expr_ref_vector m_trail;
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basic_simplifier_plugin m_simp;
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expr_mark m_mark;
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bool m_forward;
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public:
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expr_context_simplifier(ast_manager & m);
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void reduce_fix(expr * m, expr_ref & result);
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void operator()(expr * m, expr_ref & result) { reduce(m, result); }
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void insert_context(expr* e, bool polarity);
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private:
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void reduce(expr * m, expr_ref & result);
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void reduce_rec(expr * m, expr_ref & result);
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void reduce_rec(quantifier* q, expr_ref & result);
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void reduce_rec(app * a, expr_ref & result);
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void clean_trail(unsigned old_lim);
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bool insert_arg(bool is_and, expr* arg, expr_ref_vector& args);
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void reduce_and_or(bool is_and, unsigned num_args, expr * const* args, expr_ref & result);
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void reduce_and(unsigned num_args, expr * const* args, expr_ref & result);
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void reduce_or(unsigned num_args, expr * const* args, expr_ref & result);
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bool is_true(expr* e) const;
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bool is_false(expr* e) const;
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};
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class expr_strong_context_simplifier {
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ast_manager& m_manager;
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front_end_params & m_params;
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arith_util m_arith;
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unsigned m_id;
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func_decl_ref m_fn;
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smt::solver m_solver;
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void simplify(expr* e, expr_ref& result) { simplify_model_based(e, result); }
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void simplify_basic(expr* fml, expr_ref& result);
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void simplify_model_based(expr* fml, expr_ref& result);
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bool is_forced(expr* e, expr* v);
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public:
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expr_strong_context_simplifier(front_end_params& p, ast_manager& m);
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void operator()(expr* e, expr_ref& result) { simplify(e, result); }
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void operator()(expr_ref& result) { simplify(result.get(), result); }
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void push() { m_solver.push(); }
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void pop() { m_solver.pop(1); }
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void assert(expr* e) { m_solver.assert_expr(e); }
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void collect_statistics(statistics & st) const { m_solver.collect_statistics(st); }
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void reset_statistics() { m_solver.reset_statistics(); }
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void set_cancel(bool f) { m_solver.set_cancel(f); }
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};
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#endif /* _EXPR_CONTEXT_SIMPLIFIER_H__ */
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