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/*
* Copyright (c) 2023, 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.
*/
package compiler.c2.irTests;
import jdk.test.lib.Asserts;
import compiler.lib.ir_framework.*;
import java.util.Random;
import jdk.test.lib.Utils;
/*
* @test
* @summary Test that patterns leading to Conv2B are correctly expanded.
* @bug 8051725
* @library /test/lib /
* @requires vm.compiler2.enabled
* @requires os.arch == "x86_64" | os.arch == "amd64" | os.arch == "aarch64"
* @run driver compiler.c2.irTests.TestConv2BExpansion
*/
public class TestConv2BExpansion {
public static void main(String[] args) {
TestFramework.run();
}
// These IR checks do not apply on riscv64, as riscv64 supports Conv2B, e.g. for `return x == 0`,
// the graph looks like:
// Return (XorI (Conv2B ConI(#int: 1)))
// On other platforms, e.g. x86_64 which does not supports Conv2B, the graph looks like:
// Return (CMoveI (Bool (CompI (Param1 ConI(#int: 0))) ConI(#int: 1) ConI(#int: 0)))
// On riscv64, current graph is more efficient than `CMoveI`, as it
// 1. generates less code
// 2. even when zicond is not supported, it does not introduce branches.
@Test
@IR(counts = {IRNode.CMOVE_I, "1"}, failOn = {IRNode.XOR})
public boolean testIntEquals0(int x) {
return x == 0;
}
@Test
@IR(counts = {IRNode.CMOVE_I, "1"})
public boolean testIntNotEquals0(int x) {
return x != 0;
}
@Test
@IR(counts = {IRNode.CMOVE_I, "1"}, failOn = {IRNode.XOR})
public boolean testObjEqualsNull(Object o) {
return o == null;
}
@Test
@IR(counts = {IRNode.CMOVE_I, "1"})
public boolean testObjNotEqualsNull(Object o) {
return o != null;
}
@Run(test = {"testIntEquals0", "testIntNotEquals0"})
public void runTestInts() {
assertResult(0);
assertResult(1);
}
@Run(test = {"testObjEqualsNull", "testObjNotEqualsNull"})
public void runTestObjs() {
assertResult(new Object());
assertResult(null);
}
@DontCompile
public void assertResult(int x) {
Asserts.assertEQ(x == 0, testIntEquals0(x));
Asserts.assertEQ(x != 0, testIntNotEquals0(x));
}
@DontCompile
public void assertResult(Object o) {
Asserts.assertEQ(o == null, testObjEqualsNull(o));
Asserts.assertEQ(o != null, testObjNotEqualsNull(o));
}
}
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