TestIdealAllocShape.java

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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 8242895
 * @summary full loop unroll before EA creates phis between allocs projs and init
 * @run main/othervm -Xbatch -XX:CompileCommand=dontinline,*DataA.m1 compiler.escapeAnalysis.TestIdealAllocShape
 */

package compiler.escapeAnalysis;

public class TestIdealAllocShape {
    static volatile DataA f1;

    static class DataA {
        DataA f1;
        DataA(DataA p1) {
            this.f1 = p1;
        }
        public void m1() {}
    }

    public static DataA test1() {
        DataA l1 = new DataA(null);
        for (int i=0; i<2; i++) {
            try {
                return new DataA(l1); // l1 is a GlobalEscape. // control break.
            } catch (Exception e) {
            }
        }
        return null;
    }

    public static DataA test2() {
        DataA l1 = new DataA(null);
        for (int i=0; i<2; i++) {
            try {
                f1 = new DataA(l1); // l1 is a GlobalEscape.
                break; // control break.
            } catch (Exception e) {
            }
        }
        synchronized(l1) { // elided sync
            l1.m1();
        }
        return null;
    }

    public static void main(String argv[]) {

        for (int i=0; i<20000; i++) {
            TestIdealAllocShape.test1();
        }

        for (int i=0; i<20000; i++) {
            TestIdealAllocShape.test2();
        }
    }
}