jdk/test/hotspot/jtreg/compiler/loopopts/TestCreateExSunkOutOfLoop2.java

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/**
 * @test
 * @bug 8373508
 * @summary C2: sinking CreateEx out of loop breaks the graph
 * @run main/othervm -Xbatch -XX:-TieredCompilation ${test.main.class}
 * @run main ${test.main.class}
 */

package compiler.loopopts;

public class TestCreateExSunkOutOfLoop2 {
    boolean b;

    boolean getB() {
        return b;
    }

    void test() {
        int x = -845;

        for (int i = 5; i > 1; i -= 2) {
            try {
                try {
                    for (Object temp = new byte[x]; ; ) {
                        // infinite loop
                    }
                } finally {
                    int zeroLimit = 2;
                    for (; zeroLimit < 4; zeroLimit *= 2) { }

                    int zero = 34;
                    for (int peel = 2; peel < zeroLimit; peel++) {
                        zero = 0;
                    }

                    if (zero == 0) {
                        // nop
                    }

                    int flagLimit = 2;
                    for (; flagLimit < 4; flagLimit *= 2) { }

                    boolean flag = getB();
                    for (int peel = 2; peel < flagLimit; peel++) {
                        if (flag) {
                            break;
                        }
                    }
                }
            } catch (Throwable t) {
                // ignored
            }
        }
    }

    public static void main(String[] strArr) {
        TestCreateExSunkOutOfLoop2 t = new TestCreateExSunkOutOfLoop2();
        for (int i = 0; i < 10_000; ++i) {
            t.test();
        }
    }
}