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/*
* Copyright (c) 2022, 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 8286972
* @summary Test vectorization of loop induction variable usage in the loop
* @requires vm.compiler2.enabled
* @requires (os.simpleArch == "x64" & vm.cpu.features ~= ".*avx2.*") |
* (os.simpleArch == "aarch64" & vm.cpu.features ~= ".*sve.*") |
* (os.simpleArch == "riscv64" & vm.cpu.features ~= ".*rvv.*")
* @library /test/lib /
* @run driver compiler.vectorization.TestPopulateIndex
*/
package compiler.vectorization;
import compiler.lib.ir_framework.*;
import java.util.Random;
public class TestPopulateIndex {
private static final int count = 10000;
private int[] idx;
private int[] src;
private int[] dst;
private float[] f;
public static void main(String args[]) {
TestFramework.run(TestPopulateIndex.class);
}
public TestPopulateIndex() {
idx = new int[count];
src = new int[count];
dst = new int[count];
f = new float[count];
Random ran = new Random(0);
for (int i = 0; i < count; i++) {
src[i] = ran.nextInt();
}
}
@Test
@IR(counts = {IRNode.POPULATE_INDEX, "> 0"})
public void indexArrayFill() {
for (int i = 0; i < count; i++) {
idx[i] = i;
}
checkResultIndexArrayFill();
}
public void checkResultIndexArrayFill() {
for (int i = 0; i < count; i++) {
int expected = i;
if (idx[i] != expected) {
throw new RuntimeException("Invalid result: idx[" + i + "] = " + idx[i] + " != " + expected);
}
}
}
@Test
// Does not vectorize, possibly because the OrI is pushed through the Phi, see also JDK-8348096.
public void exprWithIndex1() {
for (int i = 0; i < count; i++) {
dst[i] = src[i] * (i | 7);
}
checkResultExprWithIndex1();
}
public void checkResultExprWithIndex1() {
for (int i = 0; i < count; i++) {
int expected = src[i] * (i | 7);
if (dst[i] != expected) {
throw new RuntimeException("Invalid result: dst[" + i + "] = " + dst[i] + " != " + expected);
}
}
}
@Test
@IR(counts = {IRNode.POPULATE_INDEX, "> 0"})
public void exprWithIndex2() {
for (int i = 0; i < count; i++) {
f[i] = i * i + 100;
}
checkResultExprWithIndex2();
}
public void checkResultExprWithIndex2() {
for (int i = 0; i < count; i++) {
float expected = i * i + 100;
if (f[i] != expected) {
throw new RuntimeException("Invalid result: f[" + i + "] = " + f[i] + " != " + expected);
}
}
}
@Test
// Does not vectorize: due to sum-under-mask optimization.
// (i+0) & 7, (i+1) & 7 ... (i+8) & 7 .... -> PopulateIndex
// becomes
// (i+0) & 7, (i+1) & 7 ... (i+0) & 7 .... -> pattern broken
// See JDK-8349128.
public void exprWithIndex3() {
for (int i = 0; i < count; i++) {
dst[i] = src[i] * (i & 7);
}
checkResultExprWithIndex3();
}
public void checkResultExprWithIndex3() {
for (int i = 0; i < count; i++) {
int expected = src[i] * (i & 7);
if (dst[i] != expected) {
throw new RuntimeException("Invalid result: dst[" + i + "] = " + dst[i] + " != " + expected);
}
}
}
}
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