Revert "Fixed dot output of BDDs in sylvan."

This reverts commit 6dcfd28186.

resources/3rdparty/sylvan/src/sylvan_mtbdd.c

@@ -3044,21 +3044,15 @@ mtbdd_leaf_to_str(MTBDD leaf, char *buf, size_t buflen)
  */
 
 static void
-mtbdd_fprintdot_rec(FILE *out, MTBDD mtbdd, int *mtbdd_true_marked, int *mtbdd_false_marked)
+mtbdd_fprintdot_rec(FILE *out, MTBDD mtbdd)
 {
-    if (mtbdd == mtbdd_true) {
-        if (*mtbdd_true_marked) return;
-        *mtbdd_true_marked = 1;
-        fprintf(out, "%" PRIu64 " [shape=box, style=filled, label=\"T\"];\n", mtbdd);
-    } else if (mtbdd == mtbdd_false) {
-        if (*mtbdd_false_marked) return;
-        *mtbdd_false_marked = 1;
-        fprintf(out, "%" PRIu64 " [shape=box, style=filled, label=\"F\"];\n", mtbdd);
-    } else {
     mtbddnode_t n = MTBDD_GETNODE(mtbdd); // also works for mtbdd_false
     if (mtbddnode_getmark(n)) return;
     mtbddnode_setmark(n, 1);
-        if (mtbddnode_isleaf(n)) {
+
+    if (mtbdd == mtbdd_true || mtbdd == mtbdd_false) {
+        fprintf(out, "0 [shape=box, style=filled, label=\"F\"];\n");
+    } else if (mtbddnode_isleaf(n)) {
         fprintf(out, "%" PRIu64 " [shape=box, style=filled, label=\"", MTBDD_STRIPMARK(mtbdd));
         mtbdd_fprint_leaf(out, mtbdd);
         fprintf(out, "\"];\n");
@@ -3066,18 +3060,15 @@ mtbdd_fprintdot_rec(FILE *out, MTBDD mtbdd, int *mtbdd_true_marked, int *mtbdd_f
         fprintf(out, "%" PRIu64 " [label=\"%" PRIu32 "\"];\n",
                 MTBDD_STRIPMARK(mtbdd), mtbddnode_getvariable(n));
 
-            mtbdd_fprintdot_rec(out, mtbddnode_getlow(n), mtbdd_true_marked, mtbdd_false_marked);
-            mtbdd_fprintdot_rec(out, mtbddnode_gethigh(n), mtbdd_true_marked, mtbdd_false_marked);
+        mtbdd_fprintdot_rec(out, mtbddnode_getlow(n));
+        mtbdd_fprintdot_rec(out, mtbddnode_gethigh(n));
 
         fprintf(out, "%" PRIu64 " -> %" PRIu64 " [style=dashed];\n",
-                    MTBDD_STRIPMARK(mtbdd),
-                    (mtbddnode_getlow(n) == mtbdd_true || mtbddnode_getlow(n) == mtbdd_false) ? mtbddnode_getlow(n) : MTBDD_STRIPMARK(mtbddnode_getlow(n)));
+                MTBDD_STRIPMARK(mtbdd), mtbddnode_getlow(n));
         fprintf(out, "%" PRIu64 " -> %" PRIu64 " [style=solid dir=both arrowtail=%s];\n",
-                    MTBDD_STRIPMARK(mtbdd),
-                    (mtbddnode_gethigh(n) == mtbdd_true || mtbddnode_gethigh(n) == mtbdd_false) ? mtbddnode_gethigh(n) : MTBDD_STRIPMARK(mtbddnode_gethigh(n)),
+                MTBDD_STRIPMARK(mtbdd), MTBDD_STRIPMARK(mtbddnode_gethigh(n)),
                 mtbddnode_getcomp(n) ? "dot" : "none");
     }
-    }
 }
 
 void
@@ -3091,9 +3082,7 @@ mtbdd_fprintdot(FILE *out, MTBDD mtbdd)
     fprintf(out, "root -> %" PRIu64 " [style=solid dir=both arrowtail=%s];\n",
             MTBDD_STRIPMARK(mtbdd), MTBDD_HASMARK(mtbdd) ? "dot" : "none");
 
-    int mtbdd_true_marked = 0;
-    int mtbdd_false_marked = 0;
-    mtbdd_fprintdot_rec(out, mtbdd, &mtbdd_true_marked, &mtbdd_false_marked);
+    mtbdd_fprintdot_rec(out, mtbdd);
     mtbdd_unmark_rec(mtbdd);
 
     fprintf(out, "}\n");