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/*
* Copyright (c) 2022, 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.*;
/*
* @test
* @bug 8267265
* @summary Test that Ideal transformations of MulINode* are being performed as expected.
* @library /test/lib /
* @run driver compiler.c2.irTests.MulINodeIdealizationTests
*/
public class MulINodeIdealizationTests {
public static void main(String[] args) {
TestFramework.run();
}
@Run(test = {"combineConstants", "moveConstants", "moveConstantsAgain",
"multiplyZero", "multiplyZeroAgain", "distribute",
"identity", "identityAgain", "powerTwo",
"powerTwoAgain", "powerTwoPlusOne", "powerTwoMinusOne",
"negativeCancelledOut", "maxMin"})
public void runMethod() {
int a = RunInfo.getRandom().nextInt();
int b = RunInfo.getRandom().nextInt();
int min = Integer.MIN_VALUE;
int max = Integer.MAX_VALUE;
assertResult(0, 0);
assertResult(a, b);
assertResult(min, min);
assertResult(max, max);
}
@DontCompile
public void assertResult(int a, int b) {
Asserts.assertEQ((a * 13) * 14 , combineConstants(a));
Asserts.assertEQ((a * 13) * b , moveConstants(a, b));
Asserts.assertEQ(a * (b * 13) , moveConstantsAgain(a, b));
Asserts.assertEQ(0 * a , multiplyZero(a));
Asserts.assertEQ(a * 0 , multiplyZeroAgain(a));
Asserts.assertEQ((13 + a) * 14 , distribute(a));
Asserts.assertEQ(1 * a , identity(a));
Asserts.assertEQ(a * 1 , identityAgain(a));
Asserts.assertEQ(a * 64 , powerTwo(a));
Asserts.assertEQ(a * (1025 - 1) , powerTwoAgain(a));
Asserts.assertEQ(a * (64 + 1) , powerTwoPlusOne(a));
Asserts.assertEQ(a * (64 - 1) , powerTwoMinusOne(a));
Asserts.assertEQ((0 - a) * (0 - b) , negativeCancelledOut(a, b));
Asserts.assertEQ(Math.max(a, b) * Math.min(a, b), maxMin(a, b));
}
@Test
@IR(counts = {IRNode.MUL, "1"})
//Checks (x * c1) * c2 => x * c3 where c3 = c1 * c2
public int combineConstants(int x){
return (x * 13) * 14;
}
@Test
@IR(counts = {IRNode.MUL, "2"})
// Checks (x * c1) * y => (x * y) * c1
public int moveConstants(int x, int y) {
return (x * 13) * y;
}
@Test
@IR(counts = {IRNode.MUL, "2"})
// Checks x * (y * c1) => (x * y) * c1
public int moveConstantsAgain(int x, int y) {
return x * (y * 13);
}
@Test
@IR(failOn = {IRNode.MUL})
// Checks 0 * x => 0
public int multiplyZero(int x) {
return 0 * x;
}
@Test
@IR(failOn = {IRNode.MUL})
// Checks x * 0 => 0
public int multiplyZeroAgain(int x) {
return x * 0;
}
@Test
@IR(counts = {IRNode.MUL, "1",
IRNode.ADD, "1",
})
// Checks (c1 + x) * c2 => x * c2 + c3 where c3 = c1 * c2
public int distribute(int x) {
return (13 + x) * 14;
}
@Test
@IR(failOn = {IRNode.MUL})
// Checks 1 * x => x
public int identity(int x) {
return 1 * x;
}
@Test
@IR(failOn = {IRNode.MUL})
// Checks x * 1 => x
public int identityAgain(int x) {
return x * 1;
}
@Test
@IR(failOn = {IRNode.MUL})
@IR(counts = {IRNode.LSHIFT, "1"})
// Checks x * 2^n => x << n
public int powerTwo(int x) {
return x * 64;
}
@Test
@IR(failOn = {IRNode.SUB, IRNode.MUL})
@IR(counts = {IRNode.LSHIFT, "1"})
// Checks x * 2^n => x << n
public int powerTwoAgain(int x) {
return x * (1025 - 1);
}
@Test
@IR(failOn = {IRNode.MUL})
@IR(counts = {IRNode.LSHIFT, "1",
IRNode.ADD, "1",
})
// Checks x * (2^n + 1) => (x << n) + x
public int powerTwoPlusOne(int x) {
return x * (64 + 1);
}
@Test
@IR(failOn = {IRNode.MUL})
@IR(counts = {IRNode.LSHIFT, "1",
IRNode.SUB, "1",
})
// Checks x * (2^n - 1) => (x << n) - x
public int powerTwoMinusOne(int x) {
return x * (64 - 1);
}
@Test
@IR(failOn = { IRNode.SUB })
@IR(counts = { IRNode.MUL, "1" })
// Checks (0 - x) * (0 - y) => x * y
public int negativeCancelledOut(int x, int y) {
return (0 - x) * (0 - y);
}
@Test
@IR(failOn = { IRNode.MAX, IRNode.MIN })
@IR(counts = { IRNode.MUL, "1" })
// Checks Math.max(x, y) * Math.min(x, y) => x * y
public int maxMin(int x, int y) {
return Math.max(x, y) * Math.min(x, y);
}
}
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