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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
1186 changed files with 381859 additions and 0 deletions
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lib/kbo.h Normal file
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/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
kbo.h
Abstract:
Knuth-Bendix ordering.
Author:
Leonardo de Moura (leonardo) 2008-01-28.
Revision History:
--*/
#ifndef _KBO_H_
#define _KBO_H_
#include"order.h"
class kbo : public order {
struct entry {
expr_offset m_t1;
expr_offset m_t2;
unsigned m_idx;
entry():m_idx(UINT_MAX) {}
entry(expr_offset const & t1, expr_offset const & t2, unsigned idx):
m_t1(t1), m_t2(t2), m_idx(idx) {}
};
unsigned m_var_weight;
int m_weight_balance;
var_offset_map<int> m_deltas;
unsigned m_num_pos;
unsigned m_num_neg;
svector<expr_offset> m_vwbc_todo;
svector<entry> m_compare_todo;
unsigned f_weight(func_decl * f) const;
unsigned var_weight() const;
void reset();
void inc(expr_offset v);
void dec(expr_offset v);
template<bool pos>
bool VWBc(expr_offset t, expr_offset target_var);
template<bool pos>
void VWB(expr_offset t, unsigned idx);
result no_neg() const;
result no_pos() const;
public:
kbo(ast_manager & m, precedence * p, unsigned var_weight = 1):order(m, p), m_var_weight(var_weight) {}
virtual ~kbo() {}
virtual void reserve(unsigned num_offsets, unsigned num_vars) { m_deltas.reserve(num_offsets, num_vars); }
virtual void reserve_offsets(unsigned num_offsets) { m_deltas.reserve_offsets(num_offsets); }
virtual void reserve_vars(unsigned num_vars) { m_deltas.reserve_vars(num_vars); }
virtual result compare(expr_offset const & t1, expr_offset const & t2, substitution * s);
result compare(expr * t1, expr * t2) { return compare(expr_offset(t1, 0), expr_offset(t2, 0), 0); }
virtual bool greater(expr_offset const & t1, expr_offset const & t2, substitution * s);
virtual int compare_ge(expr_offset const & t1, expr_offset const & t2, substitution * s);
};
#endif /* _KBO_H_ */