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Fix handling of z_digit "?" and fix optimization of cmp with "z"

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Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2019-09-13 13:39:39 +02:00
parent 4da6e19fe1
commit a67d63714b
2 changed files with 5 additions and 5 deletions
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4
passes/opt/opt_expr.cc
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@ -953,6 +953,10 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (b.is_fully_const()) {
if (b.is_fully_undef()) {
RTLIL::SigSpec input = b;
ACTION_DO(ID::Y, Const(State::Sx, GetSize(cell->getPort(ID::Y))));
} else
if (b.as_bool() == (cell->type == ID($eq))) {
RTLIL::SigSpec input = b;
ACTION_DO(ID::Y, cell->getPort(ID::A));