keep_hierarchy: clarify use case

widlarizer · Jul 8, 2024 · 7bb763b · 7bb763b
1 parent f04137d
commit 7bb763b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/passes/hierarchy/keep_hierarchy.cc b/passes/hierarchy/keep_hierarchy.cc
@@ -35,7 +35,8 @@ struct KeepHierarchyPass : public Pass {
 		log("\n");
 		log("    -min_cost <min_cost>\n");
 		log("        only add the attribute to modules estimated to have more\n");
-		log("        than <min_cost> gates\n");
+		log("        than <min_cost> gates after simple techmapping. Intended\n");
+		log("        for tuning trade-offs between quality and yosys runtime.\n");
 	}
 	void execute(std::vector<std::string> args, RTLIL::Design *design) override
 	{