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opt_mem: Remove write ports with const-0 EN.

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Fixes #2765.
This commit is contained in:
Marcelina Kościelnicka 2021-05-22 20:27:51 +02:00
parent 039f4f48d5
commit a23d9409e7
2 changed files with 46 additions and 0 deletions
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12
passes/opt/opt_mem.cc
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@ -52,6 +52,18 @@ struct OptMemPass : public Pass {
int total_count = 0;
for (auto module : design->selected_modules()) {
for (auto &mem : Mem::get_selected_memories(module)) {
bool changed = false;
for (auto &port : mem.wr_ports) {
if (port.en.is_fully_zero()) {
port.removed = true;
changed = true;
total_count++;
}
}
if (changed) {
mem.emit();
}
if (mem.wr_ports.empty() && mem.inits.empty()) {
mem.remove();
total_count++;