From 6ad4918121f5e71b1e79f7289a9812a630bf0db8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Povi=C5=A1er?= <povik@cutebit.org>
Date: Tue, 3 Dec 2024 11:11:59 +0100
Subject: [PATCH] Account for pre-existing `keep_hierarchy` in cost sum

---
 passes/hierarchy/keep_hierarchy.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/passes/hierarchy/keep_hierarchy.cc b/passes/hierarchy/keep_hierarchy.cc
index 61c66551b..bfae9fa38 100644
--- a/passes/hierarchy/keep_hierarchy.cc
+++ b/passes/hierarchy/keep_hierarchy.cc
@@ -37,6 +37,9 @@ struct ThresholdHierarchyKeeping {
 		if (module->has_attribute(ID(gate_cost_equivalent)))
 			return module->attributes[ID(gate_cost_equivalent)].as_int();
 
+		if (module->has_attribute(ID(keep_hierarchy)))
+			return 0;
+
 		if (module->get_blackbox_attribute())
 			log_error("Missing cost information on instanced blackbox %s\n", log_id(module));