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Respect opt_expr -keepdc as per @cliffordwolf

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This commit is contained in:
Eddie Hung 2019-08-22 08:37:27 -07:00
parent 379f33af54
commit 6f971470f8
2 changed files with 15 additions and 1 deletions
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2
passes/opt/opt_expr.cc
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@ -748,7 +748,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if (cell->type.in(ID($shiftx), ID($shift))) {
SigSpec sig_a = assign_map(cell->getPort(ID::A));
int width;
bool trim_x = true;
bool trim_x = cell->type == ID($shiftx) || !keepdc;
bool trim_0 = cell->type == ID($shift);
for (width = GetSize(sig_a); width > 1; width--) {
if ((trim_x && sig_a[width-1] == State::Sx) ||