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Made fresh variable generation in fpa2bv lazy so that it doesn't create unnecessary variables.

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This commit is contained in:
Christoph M. Wintersteiger 2015-10-26 18:10:15 +00:00
parent df1c84c182
commit 89fb5a44fb
1 changed files with 24 additions and 11 deletions
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35
src/ast/fpa/fpa2bv_converter.cpp
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@ -42,16 +42,6 @@ fpa2bv_converter::fpa2bv_converter(ast_manager & m) :
m_max_np_zeros(0, m),
m_extra_assertions(m) {
m_plugin = static_cast<fpa_decl_plugin*>(m.get_plugin(m.mk_family_id("fpa")));
m_min_pn_zeros = m.mk_fresh_const(0, m_bv_util.mk_sort(1));
m_min_np_zeros = m.mk_fresh_const(0, m_bv_util.mk_sort(1));
m_decls_to_hide.insert_if_not_there(m_min_pn_zeros->get_decl());
m_decls_to_hide.insert_if_not_there(m_min_np_zeros->get_decl());
m_max_pn_zeros = m.mk_fresh_const(0, m_bv_util.mk_sort(1));
m_max_np_zeros = m.mk_fresh_const(0, m_bv_util.mk_sort(1));
m_decls_to_hide.insert_if_not_there(m_max_pn_zeros->get_decl());
m_decls_to_hide.insert_if_not_there(m_max_np_zeros->get_decl());
}
fpa2bv_converter::~fpa2bv_converter() {
@ -1164,6 +1154,16 @@ expr_ref fpa2bv_converter::mk_min_unspecified(func_decl * f, expr * x, expr * y)
// The hardware interpretation is -0.0.
mk_nzero(f, res);
else {
if (m_min_pn_zeros == 0) {
m_min_pn_zeros = m.mk_fresh_const(0, m_bv_util.mk_sort(1));
m_decls_to_hide.insert_if_not_there(m_min_pn_zeros->get_decl());
}
if (m_min_np_zeros == 0) {
m_min_np_zeros = m.mk_fresh_const(0, m_bv_util.mk_sort(1));
m_decls_to_hide.insert_if_not_there(m_min_np_zeros->get_decl());
}
expr_ref pn(m), np(m);
mk_fp(m_min_pn_zeros,
m_bv_util.mk_numeral(0, ebits),
@ -1243,6 +1243,16 @@ expr_ref fpa2bv_converter::mk_max_unspecified(func_decl * f, expr * x, expr * y)
// The hardware interpretation is +0.0.
mk_pzero(f, res);
else {
if (m_max_pn_zeros == 0) {
m_max_pn_zeros = m.mk_fresh_const(0, m_bv_util.mk_sort(1));
m_decls_to_hide.insert_if_not_there(m_max_pn_zeros->get_decl());
}
if (m_max_np_zeros == 0) {
m_max_np_zeros = m.mk_fresh_const(0, m_bv_util.mk_sort(1));
m_decls_to_hide.insert_if_not_there(m_max_np_zeros->get_decl());
}
expr_ref pn(m), np(m);
mk_fp(m_max_pn_zeros,
m_bv_util.mk_numeral(0, ebits),
@ -3834,6 +3844,9 @@ void fpa2bv_converter::reset(void) {
dec_ref_map_key_values(m, m_const2bv);
dec_ref_map_key_values(m, m_rm_const2bv);
dec_ref_map_key_values(m, m_uf2bvuf);
m_min_np_zeros = 0;
m_min_pn_zeros = 0;
m_max_np_zeros = 0;
m_max_pn_zeros = 0;
m_extra_assertions.reset();
}