8059299: assert(adr_type != NULL) failed: expecting TypeKlassPtr

Summary: Use top() for dead paths when initializing Phi node of exceptions klasses in Parse::catch_inline_exceptions().
Reviewed-by: jrose, vlivanov

src/share/vm/opto/doCall.cpp

@@ -799,10 +799,16 @@ void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
     // each arm of the Phi.  If I know something clever about the exceptions
     // I'm loading the class from, I can replace the LoadKlass with the
     // klass constant for the exception oop.
-    if( ex_node->is_Phi() ) {
-      ex_klass_node = new (C) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT );
-      for( uint i = 1; i < ex_node->req(); i++ ) {
-        Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() );
+    if (ex_node->is_Phi()) {
+      ex_klass_node = new (C) PhiNode(ex_node->in(0), TypeKlassPtr::OBJECT);
+      for (uint i = 1; i < ex_node->req(); i++) {
+        Node* ex_in = ex_node->in(i);
+        if (ex_in == top() || ex_in == NULL) {
+          // This path was not taken.
+          ex_klass_node->init_req(i, top());
+          continue;
+        }
+        Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
         Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) );
         ex_klass_node->init_req( i, k );
       }

test/compiler/exceptions/CatchInlineExceptions.java

+/*
+ * Copyright (c) 2014, 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 8059299
+ * @summary assert(adr_type != NULL) failed: expecting TypeKlassPtr
+ * @run main/othervm -Xbatch CatchInlineExceptions
+ */
+
+class Exception1 extends Exception {};
+class Exception2 extends Exception {};
+
+public class CatchInlineExceptions {
+    private static int counter0;
+    private static int counter1;
+    private static int counter2;
+    private static int counter;
+
+    static void foo(int i) throws Exception {
+        if ((i & 1023) == 2) {
+            counter0++;
+            throw new Exception2();
+        }
+    }
+
+    static void test(int i) throws Exception {
+        try {
+           foo(i);
+        }
+        catch (Exception e) {
+            if (e instanceof Exception1) {
+                counter1++;
+            } else if (e instanceof Exception2) {
+                counter2++;
+            }
+            counter++;
+            throw e;
+        }
+    }
+
+    public static void main(String[] args) throws Throwable {
+        for (int i = 0; i < 15000; i++) {
+            try {
+                test(i);
+            } catch (Exception e) {
+                // expected
+            }
+        }
+        if (counter1 != 0) {
+            throw new RuntimeException("Failed: counter1(" + counter1  + ") != 0");
+        }
+        if (counter2 != counter0) {
+            throw new RuntimeException("Failed: counter2(" + counter2  + ") != counter0(" + counter0  + ")");
+        }
+        if (counter2 != counter) {
+            throw new RuntimeException("Failed: counter2(" + counter2  + ") != counter(" + counter  + ")");
+        }
+        System.out.println("TEST PASSED");
+    }
+}