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Some cleanups in opt_rmdff

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This commit is contained in:
Clifford Wolf 2015-07-25 12:01:25 +02:00
parent badc5f7eb9
commit 2a613b1b66
1 changed files with 9 additions and 16 deletions
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25
passes/opt/opt_rmdff.cc
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@ -130,38 +130,31 @@ bool handle_dff(RTLIL::Module *mod, RTLIL::Cell *dff)
if (sig_c.is_fully_const() && (!sig_r.size() || !has_init || val_init == val_rv)) {
if (val_rv.bits.size() == 0)
val_rv = val_init;
RTLIL::SigSig conn(sig_q, val_rv);
mod->connect(conn);
mod->connect(sig_q, val_rv);
goto delete_dff;
}
if (sig_d.is_fully_undef() && sig_r.size() && (!has_init || val_init == val_rv)) {
RTLIL::SigSig conn(sig_q, val_rv);
mod->connect(conn);
mod->connect(sig_q, val_rv);
goto delete_dff;
}
if (sig_d.is_fully_undef() && !sig_r.size() && has_init) {
RTLIL::SigSig conn(sig_q, val_init);
mod->connect(conn);
mod->connect(sig_q, val_init);
goto delete_dff;
}
if (sig_d.is_fully_const() && (!sig_r.size() || val_rv == sig_d.as_const()) && (!has_init || val_init == sig_d.as_const())) {
RTLIL::SigSig conn(sig_q, sig_d);
mod->connect(conn);
log_dump(sig_q, sig_d);
mod->connect(sig_q, sig_d);
goto delete_dff;
}
if (sig_d == sig_q && (!sig_r.size() || !has_init || val_init == val_rv)) {
if (sig_r.size()) {
RTLIL::SigSig conn(sig_q, val_rv);
mod->connect(conn);
}
if (has_init) {
RTLIL::SigSig conn(sig_q, val_init);
mod->connect(conn);
}
if (sig_r.size())
mod->connect(sig_q, val_rv);
if (has_init)
mod->connect(sig_q, val_init);
goto delete_dff;
}