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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 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.
 *
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 */
package compiler.c2.irTests;

import jdk.test.lib.Asserts;
import compiler.lib.ir_framework.*;

/*
 * @test
 * @bug 8267265 8272735
 * @summary Test that Ideal transformations of SubLNode* are being performed as expected.
 * @library /test/lib /
 * @run driver compiler.c2.irTests.SubLNodeIdealizationTests
 */
public class SubLNodeIdealizationTests {
    public static void main(String[] args) {
        TestFramework.run();
    }

    @Run(test = {"test1", "test2", "test3",
                 "test4", "test5", "test6",
                 "test7", "test8", "test9",
                 "test10", "test11", "test12",
                 "test13", "test14", "test15",
                 "test16", "test17", "test18",
                 "test19", "test20", "test21"})
    public void runMethod() {
        long a = RunInfo.getRandom().nextLong();
        long b = RunInfo.getRandom().nextLong();
        long c = RunInfo.getRandom().nextLong();

        long min = Long.MIN_VALUE;
        long max = Long.MAX_VALUE;

        assertResult(0, 0, 0);
        assertResult(a, b, c);
        assertResult(min, min, min);
        assertResult(max, max, max);
    }

    @DontCompile
    public void assertResult(long a, long b, long c) {
        Asserts.assertEQ(a - 1            , test1(a));
        Asserts.assertEQ((a + 1) - b      , test2(a, b));
        Asserts.assertEQ(a - (b + 2021)   , test3(a, b));
        Asserts.assertEQ(a - (a + b)      , test4(a, b));
        Asserts.assertEQ((a - b) - a      , test5(a, b));
        Asserts.assertEQ(a - (b + a)      , test6(a, b));
        Asserts.assertEQ(0 - (a - b)      , test7(a, b));
        Asserts.assertEQ(0 - (a + 2021)   , test8(a, b));
        Asserts.assertEQ((a + b) - (a + c), test9(a, b, c));
        Asserts.assertEQ((b + a) - (c + a), test10(a, b, c));
        Asserts.assertEQ((b + a) - (a + c), test11(a, b, c));
        Asserts.assertEQ((a + b) - (c + a), test12(a, b, c));
        Asserts.assertEQ(a - (b - c)      , test13(a, b, c));
        Asserts.assertEQ(0 - (a >> 63)    , test14(a));
        Asserts.assertEQ(0 - (0 - a)      , test15(a));
        Asserts.assertEQ((a + b) - b      , test16(a, b));
        Asserts.assertEQ((a + b) - a      , test17(a, b));
        Asserts.assertEQ(a*b - a*c        , test18(a, b, c));
        Asserts.assertEQ(a*b - b*c        , test19(a, b, c));
        Asserts.assertEQ(a*c - b*c        , test20(a, b, c));
        Asserts.assertEQ(a*b - c*a        , test21(a, b, c));
    }

    @Test
    @IR(failOn = {IRNode.SUB})
    @IR(counts = {IRNode.ADD, "1"})
    // Checks (x - c0) => x + (-c0)
    public long test1(long x) {
        return (x - 1);
    }

    @Test
    @IR(counts = {IRNode.ADD, "1",
                  IRNode.SUB, "1"
                 })
    // Checks (x + c0) - y => (x - y) + c0
    public long test2(long x, long y) {
        return (x + 1) - y;
    }

    @Test
    @IR(counts = {IRNode.SUB, "1",
                  IRNode.ADD, "1"
                 })
    // Checks x - (y + c0) => (x - y) + (-c0)
    public long test3(long x, long y) {
        return x - (y + 2021);
    }

    @Test
    @IR(failOn = {IRNode.ADD})
    @IR(counts = {IRNode.SUB, "1"})
    // Checks x - (x + y) => 0 - y
    public long test4(long x, long y) {
        return x - (x + y);
    }

    @Test
    @IR(counts = {IRNode.SUB, "1"})
    // Checks (x - y) - x => 0 - y
    public long test5(long x, long y) {
        return (x - y) - x;
    }

    @Test
    @IR(failOn = {IRNode.ADD})
    @IR(counts = {IRNode.SUB, "1"})
    // Checks x - (y + x) => 0 - y
    public long test6(long x, long y) {
        return x - (y + x);
    }

    @Test
    @IR(counts = {IRNode.SUB, "1"})
    // Checks 0 - (x - y) => y - x
    public long test7(long x, long y) {
        return 0 - (x - y);
    }

    @Test
    @IR(failOn = {IRNode.ADD})
    @IR(counts = {IRNode.SUB, "1"})
    // Checks 0 - (x + 2021) => -2021 - x
    public long test8(long x, long y) {
        return 0 - (x + 2021);
    }

    @Test
    @IR(failOn = {IRNode.ADD})
    @IR(counts = {IRNode.SUB, "1"})
    // Checks (x + a) - (x + b) => a - b;
    public long test9(long x, long a, long b) {
        return (x + a) - (x + b);
    }

    @Test
    @IR(failOn = {IRNode.ADD})
    @IR(counts = {IRNode.SUB, "1"})
    // Checks (a + x) - (b + x) => a - b
    public long test10(long x, long a, long b) {
        return (a + x) - (b + x);
    }

    @Test
    @IR(failOn = {IRNode.ADD})
    @IR(counts = {IRNode.SUB, "1"})
    // Checks (a + x) - (x + b) => a - b
    public long test11(long x, long a, long b) {
        return (a + x) - (x + b);
    }

    @Test
    @IR(failOn = {IRNode.ADD})
    @IR(counts = {IRNode.SUB, "1"})
    // Checks (x + a) - (b + x) => a - b
    public long test12(long x, long a, long b) {
        return (x + a) - (b + x);
    }

    @Test
    @IR(counts = {IRNode.SUB, "1",
                  IRNode.ADD, "1"
                 })
    // Checks a - (b - c) => (a + c) - b
    public long test13(long a, long b, long c) {
        return a - (b - c);
    }

    @Test
    @IR(failOn = {IRNode.SUB, IRNode.RSHIFT_L})
    @IR(counts = {IRNode.URSHIFT_L, "1"})
    // Checks 0 - (a >> 63) => a >>> 63
    //        signed ^^          ^^^ unsigned
    public long test14(long a) {
        return 0 - (a >> 63);
    }

    @Test
    @IR(failOn = {IRNode.SUB})
    // Checks 0 - (0 - x) => x
    public long test15(long x) {
        return 0 - (0 - x);
    }

    @Test
    @IR(failOn = {IRNode.SUB, IRNode.ADD})
    // Checks (x + y) - y => x
    public long test16(long x, long y) {
        return (x + y) - y;
    }

    @Test
    @IR(failOn = {IRNode.SUB, IRNode.ADD})
    // Checks (x + y) - x => y
    public long test17(long x, long y) {
        return (x + y) - x;
    }

    @Test
    @IR(counts = {IRNode.MUL, "1",
                  IRNode.SUB, "1"})
    // Checks "a*b-a*c => a*(b-c)
    public long test18(long a, long b, long c) {
        return a*b - a*c;
    }

    @Test
    @IR(counts = {IRNode.MUL, "1",
                  IRNode.SUB, "1"})
    // Checks a*b-b*c => b*(a-c)
    public long test19(long a, long b, long c) {
        return a*b - b*c;
    }

    @Test
    @IR(counts = {IRNode.MUL, "1",
                  IRNode.SUB, "1"})
    // Checks a*c-b*c => (a-b)*c
    public long test20(long a, long b, long c) {
        return a*c - b*c;
    }

    @Test
    @IR(counts = {IRNode.MUL, "1",
                  IRNode.SUB, "1"})
    // Checks a*b-c*a => a*(b-c)
    public long test21(long a, long b, long c) {
        return a*b - c*a;
    }
}