8355674: C2: Partial Peeling should not introduce Phi nodes above OpaqueInitializedAssertionPredicate nodes

Reviewed-by: epeter, thartmann

Author: chhagedorn

src/hotspot/share/opto/loopopts.cpp

@@ -3391,7 +3391,7 @@ void PhaseIdealLoop::clone_for_special_use_inside_loop( IdealLoopTree *loop, Nod
   for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) {
     Node* use = n->fast_out(j);
     if ( not_peel.test(use->_idx) &&
-         (use->is_If() || use->is_CMove() || use->is_Bool()) &&
+         (use->is_If() || use->is_CMove() || use->is_Bool() || use->is_OpaqueInitializedAssertionPredicate()) &&
          use->in(1) == n)  {
       worklist.push(use);
     }

test/hotspot/jtreg/compiler/predicates/assertion/TestPhiAboveOpaqueInitializedAssertionPredicate.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2025, 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 8355674
+ * @summary Check that we do not introduce a Phi above a OpaqueInitializedAssertionPredicateNode during Partial Peeling.
+ * @run main/othervm -Xcomp -XX:CompileOnly=compiler.predicates.assertion.TestPhiAboveOpaqueInitializedAssertionPredicate::test
+ *                   compiler.predicates.assertion.TestPhiAboveOpaqueInitializedAssertionPredicate
+ * @run main         compiler.predicates.assertion.TestPhiAboveOpaqueInitializedAssertionPredicate
+ */
+
+package compiler.predicates.assertion;
+
+public class TestPhiAboveOpaqueInitializedAssertionPredicate {
+    public static void main(String[] o) {
+        for (int i = 0; i < 1000; i++) {
+            test();
+        }
+    }
+
+    static void test() {
+        int e;
+        int h = 8;
+        int[][] iArr = new int[100][100];
+        for (float j = 8; j < 100 ; ++j) {
+            for (int f = 5; f > 1; f -= 2) {
+                for (int g = 1; 3 > g; ++g) {
+                    try {
+                        e = iArr[(int) j][g] / h;
+                    } catch (ArithmeticException k) {
+                    }
+                    h += g;
+                }
+            }
+        }
+    }
+}