From da99f1a330bfa363507908fe83ac2f8c7cd4b18a Mon Sep 17 00:00:00 2001
From: Jatin Bhateja <jbhateja@openjdk.org>
Date: Mon, 2 Mar 2026 14:29:11 +0000
Subject: [PATCH] 8378897: assertion failure due to missing
 depends_only_on_test_impl definition in SqrtHFNode

Reviewed-by: qamai
---
 src/hotspot/share/opto/subnode.hpp            |  3 +
 .../c2/TestDependsOnTestSqrtHFAssertion.java  | 69 +++++++++++++++++++
 2 files changed, 72 insertions(+)
 create mode 100644 test/hotspot/jtreg/compiler/c2/TestDependsOnTestSqrtHFAssertion.java

diff --git a/src/hotspot/share/opto/subnode.hpp b/src/hotspot/share/opto/subnode.hpp
index a90661c49ee..54cb1d20cd0 100644
--- a/src/hotspot/share/opto/subnode.hpp
+++ b/src/hotspot/share/opto/subnode.hpp
@@ -564,6 +564,9 @@ public:
   const Type* bottom_type() const { return Type::HALF_FLOAT; }
   virtual uint ideal_reg() const { return Op_RegF; }
   virtual const Type* Value(PhaseGVN* phase) const;
+
+private:
+  virtual bool depends_only_on_test_impl() const { return false; }
 };
 
 
diff --git a/test/hotspot/jtreg/compiler/c2/TestDependsOnTestSqrtHFAssertion.java b/test/hotspot/jtreg/compiler/c2/TestDependsOnTestSqrtHFAssertion.java
new file mode 100644
index 00000000000..5ad9a927097
--- /dev/null
+++ b/test/hotspot/jtreg/compiler/c2/TestDependsOnTestSqrtHFAssertion.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8378897
+ * @summary assertion failure due to missing depends_only_on_test_impl definition in SqrtHFNode
+ * @library /test/lib /
+ * @modules jdk.incubator.vector
+ * @requires vm.debug & vm.compiler2.enabled
+ * @run main/othervm --add-modules=jdk.incubator.vector compiler.c2.TestDependsOnTestSqrtHFAssertion
+ */
+
+package compiler.c2;
+
+import jdk.incubator.vector.*;
+
+public class TestDependsOnTestSqrtHFAssertion {
+    public static int x1 = 10;
+
+    public static int x2 = 20;
+
+    public static int y = 30;
+
+    public static int micro(int x1, int x2, int y, int ctr) {
+        int res = 0;
+        for (int i = 0; i < ctr; i++) {
+            if (y != 0) {
+                if (x1 > 0) {
+                    if (x2 > 0) {
+                        if (y != 0) {
+                            res += (int)Float16.float16ToRawShortBits(Float16.sqrt(Float16.shortBitsToFloat16((short)(x1/y))));
+                            res += (int)Float16.float16ToRawShortBits(Float16.sqrt(Float16.shortBitsToFloat16((short)(x2/y))));
+                        }
+                    }
+                }
+           }
+        }
+        return res;
+    }
+
+    public static void main(String [] args) {
+        int res = 0;
+        for (int i = 0 ; i < 100000; i++) {
+            res += micro(x1, x2, y, i);
+        }
+        IO.println("PASS" + res);
+    }
+}