From f4a10a4808737db87b1de5fcbdb5e8638bf30197 Mon Sep 17 00:00:00 2001
From: "Emil J. Tywoniak" <emil@tywoniak.eu>
Date: Mon, 20 Apr 2026 16:52:53 +0200
Subject: [PATCH] clockgate: reject $sdffe for correct priority handling

---
 passes/techmap/clockgate.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/passes/techmap/clockgate.cc b/passes/techmap/clockgate.cc
index b68e5d93d..650719cd5 100644
--- a/passes/techmap/clockgate.cc
+++ b/passes/techmap/clockgate.cc
@@ -337,6 +337,8 @@ struct ClockgatePass : public Pass {
 				FfData ff(nullptr, cell);
 				// It would be odd to get constants, but we better handle it
 				if (ff.has_ce) {
+					if (ff.has_srst && !ff.ce_over_srst)
+						continue;
 					if (!ff.sig_clk.is_bit() || !ff.sig_ce.is_bit())
 						continue;
 					if (!ff.sig_clk[0].is_wire() || !ff.sig_ce[0].is_wire())