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More opt_clean cleanups 

Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2019-05-07 14:41:58 +02:00
parent 752553d8e9
commit a76189e7ad
1 changed files with 36 additions and 26 deletions
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32
passes/opt/opt_clean.cc
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@ -320,22 +320,32 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos
if (initval.is_fully_undef())
wire->attributes.erase("\\init");
bool delete_this_wire = false;
if (GetSize(wire) == 0) {
// delete zero-width wires
goto delete_this_wire;
} else
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 */
// 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 (!raw_used_signals_noaliases.check_any(s1))
delete_this_wire = true;
if (!used_signals_nodrivers.check_any(s2))
delete_this_wire = true;
// do not get rid of public names unless in purge mode
} else
if (!raw_used_signals_noaliases.check_any(s1)) {
// delete wires that aren't used by anything directly
goto delete_this_wire;
} else
if (!used_signals_nodrivers.check_any(s2)) {
// delete wires that aren't used by anything indirectly, even though other wires may alias it
goto delete_this_wire;
}
if (delete_this_wire) {
if (0)
{
delete_this_wire:
del_wires_queue.insert(wire);
} else {
}
else
{
RTLIL::SigSig new_conn;
for (int i = 0; i < GetSize(s1); i++)
if (s1[i] != s2[i]) {
@ -355,7 +365,6 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos
used_signals.add(new_conn.second);
module->connect(new_conn);
}
}
if (!used_signals_nodrivers.check_all(s2)) {
std::string unused_bits;
@ -376,6 +385,7 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos
wire->attributes.erase("\\unused_bits");
}
}
}
int del_temp_wires_count = 0;
for (auto wire : del_wires_queue) {