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8141624: Limit calculation of pre loop during super word optimization is wrong

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Reviewed-by: vlivanov, kvn
This commit is contained in:
Vladimir Kozlov 2015-11-10 21:36:35 -08:00
parent e73df9dee6
commit 6ed8c23581
2 changed files with 57 additions and 1 deletions
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2
hotspot/src/share/vm/opto/superword.cpp
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@ -558,7 +558,7 @@ void SuperWord::find_adjacent_refs() {
assert(!same_velt_type(s, mem_ref), "sanity"); assert(!same_velt_type(s, mem_ref), "sanity");
memops.push(s); 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) { if (best_align_to_mem_ref == NULL) {
NOT_PRODUCT(if (TraceSuperWord) tty->print_cr("SuperWord::find_adjacent_refs(): best_align_to_mem_ref == NULL");) NOT_PRODUCT(if (TraceSuperWord) tty->print_cr("SuperWord::find_adjacent_refs(): best_align_to_mem_ref == NULL");)
break; break;

56
hotspot/test/compiler/loopopts/superword/TestBestAlign.java Normal file
View file

@ -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();
}
}
}