hashlib: prevent naive hashing of IdString when hashing SigBit

YosysHQ · Oct 30, 2024 · 9bdecc5 · 9bdecc5
1 parent df44003
commit 9bdecc5
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/kernel/rtlil.h b/kernel/rtlil.h
@@ -1819,8 +1819,10 @@ inline bool RTLIL::SigBit::operator!=(const RTLIL::SigBit &other) const {
 
 inline Hasher RTLIL::SigBit::hash_acc(Hasher h) const {
 	if (wire) {
-		h = wire->name.hash_acc(h);
 		h.acc(offset);
+		// hash_acc isn't allowed to come first, or it might hash trivially
+		// and possibly ruin things
+		h = wire->name.hash_acc(h);
 		return h;
 	}
 	h.acc(data);