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| author | Clifford Wolf <clifford@clifford.at> | 2019-06-26 17:54:17 +0200 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2019-06-26 17:54:17 +0200 |
| commit | 0b7d648c6a71594f8a17e78aef8f62b6f6448390 (patch) | |
| tree | 8db2ada1fd751b8fc0b44a1f59f91666f68f5289 /passes/opt/opt_clean.cc | |
| parent | 1b49380f6bd79cb037fb36a3d06adf386968dc47 (diff) | |
| download | yosys-0b7d648c6a71594f8a17e78aef8f62b6f6448390.tar.gz yosys-0b7d648c6a71594f8a17e78aef8f62b6f6448390.tar.bz2 yosys-0b7d648c6a71594f8a17e78aef8f62b6f6448390.zip | |
Improve opt_clean handling of unused public wires
Signed-off-by: Clifford Wolf <clifford@clifford.at>
Diffstat (limited to 'passes/opt/opt_clean.cc')
| -rw-r--r-- | passes/opt/opt_clean.cc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/passes/opt/opt_clean.cc b/passes/opt/opt_clean.cc index 5f75288e2..a8a8e0bc7 100644 --- a/passes/opt/opt_clean.cc +++ b/passes/opt/opt_clean.cc @@ -326,8 +326,8 @@ bool rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos 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 + if (!purge_mode && check_public_name(wire->name) && (raw_used_signals.check_any(s1) || used_signals.check_any(s2) || s1 != s2)) { + // do not get rid of public names unless in purge mode or if the wire is entirely unused, not even aliased } else if (!raw_used_signals.check_any(s1)) { // delete wires that aren't used by anything directly |