From 04822c66600eef91f5b495233350abd15454348b Mon Sep 17 00:00:00 2001
From: nella <simontupy64@gmail.com>
Date: Mon, 2 Mar 2026 12:11:25 +0100
Subject: [PATCH] Readd builtin_ff_cell_types for plugin parity.

---
 kernel/rtlil.cc | 13 +++++++++++++
 kernel/rtlil.h  |  3 +++
 2 files changed, 16 insertions(+)

diff --git a/kernel/rtlil.cc b/kernel/rtlil.cc
index 339450c6a..66bf3b9f7 100644
--- a/kernel/rtlil.cc
+++ b/kernel/rtlil.cc
@@ -288,6 +288,19 @@ void RTLIL::OwningIdString::collect_garbage()
 
 dict<std::string, std::string> RTLIL::constpad;
 
+const pool<IdString> &RTLIL::builtin_ff_cell_types() {
+	static const pool<IdString> res = []() {
+		pool<IdString> r;
+		for (size_t i = 0; i < StaticCellTypes::builder.count; i++) {
+			auto &cell = StaticCellTypes::builder.cells[i];
+			if (cell.features.is_ff)
+				r.insert(cell.type);
+		}
+		return r;
+	}();
+	return res;
+}
+
 #define check(condition) log_assert(condition && "malformed Const union")
 
 const Const::bitvectype& Const::get_bits() const {
diff --git a/kernel/rtlil.h b/kernel/rtlil.h
index 18bac5e6a..6f26d0d39 100644
--- a/kernel/rtlil.h
+++ b/kernel/rtlil.h
@@ -737,6 +737,9 @@ template <> struct IDMacroHelper<-1> {
 namespace RTLIL {
 	extern dict<std::string, std::string> constpad;
 
+	[[deprecated("use StaticCellTypes::categories.is_ff() instead")]]
+	const pool<IdString> &builtin_ff_cell_types();
+
 	static inline std::string escape_id(const std::string &str) {
 		if (str.size() > 0 && str[0] != '\\' && str[0] != '$')
 			return "\\" + str;