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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
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Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
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lib/expr_stat.cpp Normal file
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/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
expr_stat.cpp
Abstract:
Expression statistics (symbol count, var count, depth, ...)
All functions in these module assume expressions do not contain
nested quantifiers.
Author:
Leonardo de Moura (leonardo) 2008-02-05.
Revision History:
--*/
#include"for_each_expr.h"
#include"expr_stat.h"
void get_expr_stat(expr * n, expr_stat & r) {
typedef std::pair<expr *, unsigned> pair;
buffer<pair> todo;
todo.push_back(pair(n, 0));
while (!todo.empty()) {
pair & p = todo.back();
n = p.first;
unsigned depth = p.second;
unsigned j;
todo.pop_back();
r.m_sym_count++;
if (depth > r.m_depth)
r.m_depth = depth;
switch (n->get_kind()) {
case AST_APP:
j = to_app(n)->get_num_args();
if (j == 0)
r.m_const_count++;
while (j > 0) {
--j;
todo.push_back(pair(to_app(n)->get_arg(j), depth + 1));
}
break;
case AST_VAR:
if (to_var(n)->get_idx() > r.m_max_var_idx)
r.m_max_var_idx = to_var(n)->get_idx();
r.m_ground = false;
break;
case AST_QUANTIFIER:
todo.push_back(pair(to_quantifier(n)->get_expr(), depth+1));
break;
default:
UNREACHABLE();
}
}
}
unsigned get_symbol_count(expr * n) {
unsigned r = 0;
ptr_buffer<expr> todo;
todo.push_back(n);
while (!todo.empty()) {
n = todo.back();
unsigned j;
todo.pop_back();
r++;
switch (n->get_kind()) {
case AST_APP:
j = to_app(n)->get_num_args();
while (j > 0) {
--j;
todo.push_back(to_app(n)->get_arg(j));
}
break;
case AST_QUANTIFIER:
todo.push_back(to_quantifier(n)->get_expr());
break;
default:
break;
}
}
return r;
}