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Bugfix in opt_const $eq -> buffer code

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This commit is contained in:
Clifford Wolf 2015-01-31 23:25:32 +01:00
parent 67218443be
commit 8dfa105255
1 changed files with 4 additions and 4 deletions
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8
passes/opt/opt_const.cc
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@ -524,11 +524,11 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
RTLIL::SigSpec a = assign_map(cell->getPort("\\A"));
RTLIL::SigSpec b = assign_map(cell->getPort("\\B"));
if (a.is_fully_const()) {
if (a.is_fully_const() && !b.is_fully_const()) {
cover_list("opt.opt_const.eqneq.swapconst", "$eq", "$ne", cell->type.str());
RTLIL::SigSpec tmp = cell->getPort("\\A");
cell->setPort("\\A", cell->getPort("\\B"));
cell->setPort("\\B", tmp);
cell->setPort("\\A", b);
cell->setPort("\\B", a);
std::swap(a, b);
}
if (b.is_fully_const()) {