From 7532334875208bf7f0171c9185f5a22b0bbda1b5 Mon Sep 17 00:00:00 2001
From: "Emil J. Tywoniak" <emil@tywoniak.eu>
Date: Mon, 24 Jun 2024 13:05:56 +0200
Subject: [PATCH] failed trick with tag_dict to track which dict of consts
 takes up space

---
 kernel/hashlib.h | 34 ++++++++++++++++++++++++++++++++++
 kernel/rtlil.h   |  2 +-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/kernel/hashlib.h b/kernel/hashlib.h
index e8ddddd33..208e5eeab 100644
--- a/kernel/hashlib.h
+++ b/kernel/hashlib.h
@@ -211,6 +211,7 @@ inline int hashtable_size(int min_size)
 	throw std::length_error("hash table exceeded maximum size.");
 }
 
+template<typename K, typename T, typename OPS = hash_ops<K>> class tag_dict;
 template<typename K, typename T, typename OPS = hash_ops<K>> class dict;
 template<typename K, int offset = 0, typename OPS = hash_ops<K>> class idict;
 template<typename K, typename OPS = hash_ops<K>> class pool;
@@ -671,6 +672,39 @@ public:
 	const_iterator end() const { return const_iterator(nullptr, -1); }
 };
 
+template<typename K, typename T, typename OPS>
+class tag_dict : public dict<K, T, OPS> {
+	public:
+	tag_dict& operator = (const tag_dict& rhs) {
+		dict<K, T, OPS>::operator =(rhs);
+		return *this;
+	}
+	tag_dict& operator = (tag_dict&& rhs) {
+		dict<K, T, OPS>::operator =(rhs);
+		return *this;
+	}
+	constexpr tag_dict() : dict<K, T, OPS>()
+	{
+	}
+
+	tag_dict(const dict<K, T, OPS> &other) : dict<K, T, OPS>(other) { }
+	tag_dict(const tag_dict &other) : dict<K, T, OPS>(other) { }
+	// tag_dict(const tag_dict &other)
+	// {
+	// 	dict<K, T, OPS>(other);
+	// 	// entries = other.entries;
+	// 	// do_rehash();
+	// }
+
+	tag_dict(dict<K, T, OPS> &&other) : dict<K, T, OPS>(other) { }
+	tag_dict(tag_dict &&other) : dict<K, T, OPS>(other) { }
+	// tag_dict(tag_dict &&other)
+	// {
+	// 	dict<K, T, OPS>(other);
+	// 	// swap(other);
+	// }
+};
+
 template<typename K, typename OPS>
 class pool
 {
diff --git a/kernel/rtlil.h b/kernel/rtlil.h
index f9da29495..08457f4f0 100644
--- a/kernel/rtlil.h
+++ b/kernel/rtlil.h
@@ -1565,7 +1565,7 @@ public:
 	RTLIL::IdString name;
 	RTLIL::IdString type;
 	dict<RTLIL::IdString, RTLIL::SigSpec> connections_;
-	dict<RTLIL::IdString, RTLIL::Const> parameters;
+	hashlib::tag_dict<RTLIL::IdString, RTLIL::Const> parameters;
 
 	// access cell ports
 	bool hasPort(const RTLIL::IdString &portname) const;