using improved type for non-constants

chhagedorn · Mar 28, 2024 · 660c0de · 660c0de
1 parent 26a717d
commit 660c0de
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/hotspot/share/opto/graphKit.cpp b/src/hotspot/share/opto/graphKit.cpp
@@ -3359,8 +3359,12 @@ Node* GraphKit::gen_checkcast(Node *obj, Node* superklass,
   if (cast_obj == nullptr) {
     // Generate the subtype check
     Node* improved_superklass = superklass;
-    if (improved_klass_ptr_type != klass_ptr_type && improved_klass_ptr_type->singleton()) {
-      improved_superklass = makecon(improved_klass_ptr_type);
+    if (improved_klass_ptr_type != klass_ptr_type) {
+      if (improved_klass_ptr_type->singleton()) {
+        improved_superklass = makecon(improved_klass_ptr_type);
+      } else {
+        improved_superklass = _gvn.transform(new CastPPNode(nullptr, superklass, improved_klass_ptr_type));
+      }
     }
     Node* not_subtype_ctrl = gen_subtype_check(not_null_obj, improved_superklass);