changeset 26477:a4ca6077f669

8141624: Limit calculation of pre loop during super word optimization is wrong Reviewed-by: vlivanov, kvn
author kvn
date Tue, 10 Nov 2015 21:36:35 -0800
parents 1474303fbb0f
children 1d42c245cc87
files src/share/vm/opto/superword.cpp test/compiler/loopopts/superword/TestBestAlign.java
diffstat 2 files changed, 57 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/src/share/vm/opto/superword.cpp	Tue Nov 10 11:50:20 2015 -1000
+++ b/src/share/vm/opto/superword.cpp	Tue Nov 10 21:36:35 2015 -0800
@@ -558,7 +558,7 @@
           assert(!same_velt_type(s, mem_ref), "sanity");
           memops.push(s);
         }
-        MemNode* best_align_to_mem_ref = find_align_to_ref(memops);
+        best_align_to_mem_ref = find_align_to_ref(memops);
         if (best_align_to_mem_ref == NULL) {
           NOT_PRODUCT(if (TraceSuperWord) tty->print_cr("SuperWord::find_adjacent_refs(): best_align_to_mem_ref == NULL");)
           break;
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/loopopts/superword/TestBestAlign.java	Tue Nov 10 21:36:35 2015 -0800
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2015 SAP AG.  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 8141624
+ * @summary Limit calculation of pre loop during super word optimization is wrong
+ * @run main/othervm TestBestAlign
+ * @author gunter.haug@sap.com
+ */
+
+public class TestBestAlign {
+
+    static final int initVal = -1;
+    static int intArray [];
+    static boolean boolArray[];
+    static int limit;
+    static public void clear() {
+        for (int i = 0; i < limit; i++) {
+            boolArray[1] = true;
+            intArray[i] = initVal;
+            boolArray[2] = true;
+        }
+    }
+
+    public static void main(String argv[]) throws Exception {
+        limit = 64;
+        boolArray = new boolean[8];
+        intArray = new int[limit + 4];
+        for (int i = 0; i < 10000000; ++i) {
+            if(i % 1000000 == 0)
+                System.out.println(i);
+            clear();
+        }
+    }
+}