smt2: Check for constant bool after fully resolving signal

* This fixes #3769
YosysHQ · Sep 24, 2023 · f6f85f4 · f6f85f4
1 parent 934c822
commit f6f85f4
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/backends/smt2/smt2.cc b/backends/smt2/smt2.cc
@@ -329,13 +329,14 @@ struct Smt2Worker
 	{
 		sigmap.apply(bit);
 
+		if (bit_driver.count(bit)) {
+			export_cell(bit_driver.at(bit));
+			sigmap.apply(bit);
+		}
+
 		if (bit.wire == nullptr)
 			return bit == RTLIL::State::S1 ? "true" : "false";
 
-		if (bit_driver.count(bit))
-			export_cell(bit_driver.at(bit));
-		sigmap.apply(bit);
-
 		if (fcache.count(bit) == 0) {
 			if (verbose) log("%*s-> external bool: %s\n", 2+2*GetSize(recursive_cells), "",
 					log_signal(bit));