mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-06-06 14:13:23 +00:00
Code Activity

Merge branch 'master' of github.com:YosysHQ/yosys into clifford/fix968

Browse source
This commit is contained in:
Clifford Wolf 2019-05-06 15:41:13 +02:00
commit d187be39d6
35 changed files with 788 additions and 291 deletions
Download patch file Download diff file Expand all files Collapse all files

127
passes/opt/opt_clean.cc
View file

@ -272,6 +272,10 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos
}
}
SigPool raw_used_signals_noaliases;
for (auto &it : module->connections_)
raw_used_signals_noaliases.add(it.second);
module->connections_.clear();
SigPool used_signals;
@ -281,6 +285,7 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos
for (auto &it2 : cell->connections_) {
assign_map.apply(it2.second);
used_signals.add(it2.second);
raw_used_signals_noaliases.add(it2.second);
if (!ct_all.cell_output(cell->type, it2.first))
used_signals_nodrivers.add(it2.second);
}
@ -301,53 +306,63 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos
}
}
std::vector<RTLIL::Wire*> maybe_del_wires;
pool<RTLIL::Wire*> del_wires_queue;
for (auto wire : module->wires())
{
if ((!purge_mode && check_public_name(wire->name)) || wire->port_id != 0 || wire->get_bool_attribute("\\keep") || wire->attributes.count("\\init")) {
RTLIL::SigSpec s1 = RTLIL::SigSpec(wire), s2 = s1;
assign_map.apply(s2);
if (!used_signals.check_any(s2) && wire->port_id == 0 && !wire->get_bool_attribute("\\keep")) {
maybe_del_wires.push_back(wire);
} else {
log_assert(GetSize(s1) == GetSize(s2));
Const initval;
if (wire->attributes.count("\\init"))
initval = wire->attributes.at("\\init");
if (GetSize(initval) != GetSize(wire))
initval.bits.resize(GetSize(wire), State::Sx);
RTLIL::SigSig new_conn;
for (int i = 0; i < GetSize(s1); i++)
if (s1[i] != s2[i]) {
if (s2[i] == State::Sx && (initval[i] == State::S0 || initval[i] == State::S1)) {
s2[i] = initval[i];
initval[i] = State::Sx;
}
new_conn.first.append_bit(s1[i]);
new_conn.second.append_bit(s2[i]);
}
if (new_conn.first.size() > 0) {
if (initval.is_fully_undef())
wire->attributes.erase("\\init");
else
wire->attributes.at("\\init") = initval;
used_signals.add(new_conn.first);
used_signals.add(new_conn.second);
module->connect(new_conn);
}
}
SigSpec s1 = SigSpec(wire), s2 = assign_map(s1);
log_assert(GetSize(s1) == GetSize(s2));
Const initval;
if (wire->attributes.count("\\init"))
initval = wire->attributes.at("\\init");
if (GetSize(initval) != GetSize(wire))
initval.bits.resize(GetSize(wire), State::Sx);
if (initval.is_fully_undef())
wire->attributes.erase("\\init");
bool delete_this_wire = false;
if (wire->port_id != 0 || wire->get_bool_attribute("\\keep") || !initval.is_fully_undef()) {
/* do not delete anything with "keep" or module ports or initialized wires */
} else
if (!purge_mode && check_public_name(wire->name)) {
/* do not get rid of public names unless in purge mode */
} else {
if (!used_signals.check_any(RTLIL::SigSpec(wire)))
maybe_del_wires.push_back(wire);
if (!raw_used_signals_noaliases.check_any(s1))
delete_this_wire = true;
if (!used_signals_nodrivers.check_any(s2))
delete_this_wire = true;
}
RTLIL::SigSpec sig = assign_map(RTLIL::SigSpec(wire));
if (!used_signals_nodrivers.check_any(sig)) {
if (delete_this_wire) {
del_wires_queue.insert(wire);
} else {
RTLIL::SigSig new_conn;
for (int i = 0; i < GetSize(s1); i++)
if (s1[i] != s2[i]) {
if (s2[i] == State::Sx && (initval[i] == State::S0 || initval[i] == State::S1)) {
s2[i] = initval[i];
initval[i] = State::Sx;
}
new_conn.first.append_bit(s1[i]);
new_conn.second.append_bit(s2[i]);
}
if (new_conn.first.size() > 0) {
if (initval.is_fully_undef())
wire->attributes.erase("\\init");
else
wire->attributes.at("\\init") = initval;
used_signals.add(new_conn.first);
used_signals.add(new_conn.second);
module->connect(new_conn);
}
}
if (!used_signals_nodrivers.check_all(s2)) {
std::string unused_bits;
for (int i = 0; i < GetSize(sig); i++) {
if (sig[i].wire == NULL)
for (int i = 0; i < GetSize(s2); i++) {
if (s2[i].wire == NULL)
continue;
if (!used_signals_nodrivers.check(sig[i])) {
if (!used_signals_nodrivers.check(s2[i])) {
if (!unused_bits.empty())
unused_bits += " ";
unused_bits += stringf("%d", i);
@ -362,24 +377,19 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos
}
}
int del_temp_wires_count = 0;
for (auto wire : del_wires_queue) {
if (ys_debug() || (check_public_name(wire->name) && verbose))
log_debug(" removing unused non-port wire %s.\n", wire->name.c_str());
else
del_temp_wires_count++;
}
pool<RTLIL::Wire*> del_wires;
module->remove(del_wires_queue);
count_rm_wires += GetSize(del_wires_queue);
int del_wires_count = 0;
for (auto wire : maybe_del_wires)
if (!used_signals.check_any(RTLIL::SigSpec(wire))) {
if (check_public_name(wire->name) && verbose) {
log_debug(" removing unused non-port wire %s.\n", wire->name.c_str());
}
del_wires.insert(wire);
del_wires_count++;
}
module->remove(del_wires);
count_rm_wires += del_wires.size();
if (verbose && del_wires_count > 0)
log_debug(" removed %d unused temporary wires.\n", del_wires_count);
if (verbose && del_temp_wires_count)
log_debug(" removed %d unused temporary wires.\n", del_temp_wires_count);
}
bool rmunused_module_init(RTLIL::Module *module, bool purge_mode, bool verbose)
@ -526,6 +536,9 @@ struct OptCleanPass : public Pass {
ct_all.setup(design);
count_rm_cells = 0;
count_rm_wires = 0;
for (auto module : design->selected_whole_modules_warn()) {
if (module->has_processes_warn())
continue;
@ -591,7 +604,7 @@ struct CleanPass : public Pass {
for (auto module : design->selected_whole_modules()) {
if (module->has_processes())
continue;
rmunused_module(module, purge_mode, false, false);
rmunused_module(module, purge_mode, ys_debug(), false);
}
log_suppressed();