changeset 54500:80b55cf3a804

8202952: C2: Unexpected dead nodes after matching Reviewed-by: kvn
author vlivanov
date Tue, 22 Jan 2019 18:14:14 -0800
parents ea254e9fc587
children fd0e3299326d
files src/hotspot/cpu/x86/x86.ad test/hotspot/jtreg/compiler/c2/TestMatcherLargeOffset.java
diffstat 2 files changed, 61 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/src/hotspot/cpu/x86/x86.ad	Tue Jan 22 18:13:49 2019 -0800
+++ b/src/hotspot/cpu/x86/x86.ad	Tue Jan 22 18:14:14 2019 -0800
@@ -1638,6 +1638,7 @@
     // Cheap to find it by looking for screwy base.
     if (adr->is_AddP() &&
         !adr->in(AddPNode::Base)->is_top() &&
+        LP64_ONLY( off->get_long() == (int) (off->get_long()) && ) // immL32
         // Are there other uses besides address expressions?
         !is_visited(adr)) {
       address_visited.set(adr->_idx); // Flag as address_visited
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/c2/TestMatcherLargeOffset.java	Tue Jan 22 18:14:14 2019 -0800
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2019, 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 8202952
+ * @summary C2: Unexpected dead nodes after matching
+ *
+ * @run main/othervm -XX:-TieredCompilation -Xcomp -XX:CompileOnly=::test
+ *      compiler.c2.TestMatcherLargeOffset
+ */
+package compiler.c2;
+
+public class TestMatcherLargeOffset {
+    public static final int N = 400;
+    public static int iArrFld[] = new int[N];
+
+    public static void m(int i4) {
+        i4 |= -104;
+        iArrFld[(i4 >>> 1) % N] >>= i4;
+    }
+
+    public static void test() {
+        int i2 = 1, i24 = 65;
+        for (int i1 = 7; i1 < 384; ++i1) {
+            for (long l = 2; l < 67; l++) {
+                m(i2);
+                for (i24 = 1; 2 > i24; ++i24) {
+                    iArrFld = iArrFld;
+                }
+            }
+            i2 = (-229 / i24);
+        }
+    }
+    public static void main(String[] strArr) {
+        for (int i = 0; i < 5; i++ ) {
+            test();
+        }
+    }
+}