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optimize pattern matching code generator for DAG patterns

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generated code now uses COMPARE instructions to compare subtrees instead of diving into both subtrees. Code is thus smaller and fails faster.
This commit is contained in:
Nuno Lopes 2016-11-28 13:48:15 +00:00
parent 1799310155
commit 4452ac0d6d
1 changed files with 18 additions and 10 deletions
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28
src/smt/mam.cpp
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@ -424,7 +424,7 @@ namespace smt {
out << *curr;
curr = curr->m_next;
while (curr != 0 && curr->m_opcode != CHOOSE && curr->m_opcode != NOOP) {
out << " ";
out << "\n";
out << *curr;
curr = curr->m_next;
}
@ -796,6 +796,7 @@ namespace smt {
unsigned m_num_choices;
bool m_is_tmp_tree;
svector<unsigned> m_mp_already_processed;
obj_map<expr, unsigned> m_matched_exprs;
struct pcheck_checked {
func_decl * m_label;
@ -840,6 +841,7 @@ namespace smt {
m_mp = mp;
m_num_choices = 0;
m_todo.reset();
m_matched_exprs.reset();
m_registers.fill(0);
app * p = to_app(mp->get_arg(first_idx));
@ -951,7 +953,15 @@ namespace smt {
set_check_mark(reg, NOT_CHECKED); // reset mark, register was fully processed.
continue;
}
unsigned matched_reg;
if (m_matched_exprs.find(p, matched_reg) && reg != matched_reg) {
m_seq.push_back(m_ct_manager.mk_compare(matched_reg, reg));
set_check_mark(reg, NOT_CHECKED); // reset mark, register was fully processed.
continue;
}
m_matched_exprs.insert(p, reg);
if (m_use_filters && get_check_mark(reg) != CHECK_SINGLETON) {
func_decl * lbl = to_app(p)->get_decl();
approx_set s(m_lbl_hasher(lbl));
@ -1311,9 +1321,6 @@ namespace smt {
unsigned reg2 = instr->m_reg2;
return
m_registers[reg1] != 0 &&
m_registers[reg2] != 0 &&
is_var(m_registers[reg1]) &&
is_var(m_registers[reg2]) &&
m_registers[reg1] == m_registers[reg2];
}
@ -1571,12 +1578,13 @@ namespace smt {
unsigned reg1 = static_cast<compare*>(curr)->m_reg1;
unsigned reg2 = static_cast<compare*>(curr)->m_reg2;
SASSERT(m_todo.contains(reg2));
m_todo.erase(reg1);
m_todo.erase(reg2);
SASSERT(is_var(m_registers[reg1]));
unsigned var_id = to_var(m_registers[reg1])->get_idx();
if (m_vars[var_id] == -1)
m_vars[var_id] = reg1;
if (is_var(m_registers[reg1])) {
m_todo.erase(reg1);
unsigned var_id = to_var(m_registers[reg1])->get_idx();
if (m_vars[var_id] == -1)
m_vars[var_id] = reg1;
}
m_compatible.push_back(curr);
}
else {