Use SVA label in smt export if available

Signed-off-by: Clifford Wolf <clifford@clifford.at>

diff --git a/backends/smt2/smt2.cc b/backends/smt2/smt2.cc
index 7f3cc94cadbcb33063f248306ffe8b078c6b3aab..a26bff57b05f29b0ce685f4a9c7d23efe63d0dfc 100644 (file)
--- a/backends/smt2/smt2.cc
+++ b/backends/smt2/smt2.cc
@@ -887,8 +887,8 @@ struct Smt2Worker
 
                                string name_a = get_bool(cell->getPort("\\A"));
                                string name_en = get_bool(cell->getPort("\\EN"));
-                               decls.push_back(stringf("; yosys-smt2-%s %d %s\n", cell->type.c_str() + 1, id,
-                                               cell->attributes.count("\\src") ? cell->attributes.at("\\src").decode_string().c_str() : get_id(cell)));
+                               string infostr = (cell->name[0] == '$' && cell->attributes.count("\\src")) ? cell->attributes.at("\\src").decode_string() : get_id(cell);
+                               decls.push_back(stringf("; yosys-smt2-%s %d %s\n", cell->type.c_str() + 1, id, infostr.c_str()));
 
                                if (cell->type == "$cover")
                                        decls.push_back(stringf("(define-fun |%s_%c %d| ((state |%s_s|)) Bool (and %s %s)) ; %s\n",