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-rw-r--r--passes/hierarchy/hierarchy.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/passes/hierarchy/hierarchy.cc b/passes/hierarchy/hierarchy.cc
index 4786aacaf..037fdb3b2 100644
--- a/passes/hierarchy/hierarchy.cc
+++ b/passes/hierarchy/hierarchy.cc
@@ -625,6 +625,9 @@ struct HierarchyPass : public Pass {
for (auto module : design->modules())
for (auto cell : module->cells())
{
+ if (GetSize(cell->parameters) != 0)
+ continue;
+
Module *m = design->module(cell->type);
if (m == nullptr)