8043546: C1 optimizes @Stable instance fields with default values
Reviewed-by: kvn, jrose
/*
* Copyright (c) 2014, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
/*
* @test TestStableInt
* @summary tests on stable fields and arrays
* @library /testlibrary /testlibrary/whitebox
* @build TestStableInt StableConfiguration sun.hotspot.WhiteBox
* @run main ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main ClassFileInstaller
* java/lang/invoke/StableConfiguration
* java/lang/invoke/TestStableInt
* java/lang/invoke/TestStableInt$IntStable
* java/lang/invoke/TestStableInt$StaticIntStable
* java/lang/invoke/TestStableInt$VolatileIntStable
* java/lang/invoke/TestStableInt$IntArrayDim1
* java/lang/invoke/TestStableInt$IntArrayDim2
* java/lang/invoke/TestStableInt$IntArrayDim3
* java/lang/invoke/TestStableInt$IntArrayDim4
* java/lang/invoke/TestStableInt$ObjectArrayLowerDim0
* java/lang/invoke/TestStableInt$ObjectArrayLowerDim1
* java/lang/invoke/TestStableInt$NestedStableField
* java/lang/invoke/TestStableInt$NestedStableField$A
* java/lang/invoke/TestStableInt$NestedStableField1
* java/lang/invoke/TestStableInt$NestedStableField1$A
* java/lang/invoke/TestStableInt$NestedStableField2
* java/lang/invoke/TestStableInt$NestedStableField2$A
* java/lang/invoke/TestStableInt$NestedStableField3
* java/lang/invoke/TestStableInt$NestedStableField3$A
* java/lang/invoke/TestStableInt$DefaultValue
* java/lang/invoke/TestStableInt$DefaultStaticValue
* java/lang/invoke/TestStableInt$ObjectArrayLowerDim2
*
* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions
* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xcomp
* -server -XX:-TieredCompilation
* -XX:+FoldStableValues
* -XX:CompileOnly=::get,::get1,::get2,::get3,::get4
* java.lang.invoke.TestStableInt
* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions
* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xcomp
* -server -XX:-TieredCompilation
* -XX:-FoldStableValues
* -XX:CompileOnly=::get,::get1,::get2,::get3,::get4
* java.lang.invoke.TestStableInt
*
* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions
* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xcomp
* -server -XX:+TieredCompilation -XX:TieredStopAtLevel=1
* -XX:+FoldStableValues
* -XX:CompileOnly=::get,::get1,::get2,::get3,::get4
* java.lang.invoke.TestStableInt
* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions
* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xcomp
* -server -XX:+TieredCompilation -XX:TieredStopAtLevel=1
* -XX:-FoldStableValues
* -XX:CompileOnly=::get,::get1,::get2,::get3,::get4
* java.lang.invoke.TestStableInt
*
* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions
* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xcomp
* -client -XX:-TieredCompilation
* -XX:+FoldStableValues
* -XX:CompileOnly=::get,::get1,::get2,::get3,::get4
* java.lang.invoke.TestStableInt
* @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions
* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xcomp
* -client -XX:-TieredCompilation
* -XX:-FoldStableValues
* -XX:CompileOnly=::get,::get1,::get2,::get3,::get4
* java.lang.invoke.TestStableInt
*/
package java.lang.invoke;
import java.lang.reflect.InvocationTargetException;
public class TestStableInt {
static final boolean isStableEnabled = StableConfiguration.isStableEnabled;
static final boolean isServerWithStable = StableConfiguration.isServerWithStable;
public static void main(String[] args) throws Exception {
run(DefaultValue.class);
run(IntStable.class);
run(DefaultStaticValue.class);
run(StaticIntStable.class);
run(VolatileIntStable.class);
// @Stable arrays: Dim 1-4
run(IntArrayDim1.class);
run(IntArrayDim2.class);
run(IntArrayDim3.class);
run(IntArrayDim4.class);
// @Stable Object field: dynamic arrays
run(ObjectArrayLowerDim0.class);
run(ObjectArrayLowerDim1.class);
run(ObjectArrayLowerDim2.class);
// Nested @Stable fields
run(NestedStableField.class);
run(NestedStableField1.class);
run(NestedStableField2.class);
run(NestedStableField3.class);
if (failed) {
throw new Error("TEST FAILED");
}
}
/* ==================================================== */
static class DefaultValue {
public @Stable int v;
public static final DefaultValue c = new DefaultValue();
public static int get() { return c.v; }
public static void test() throws Exception {
int val1 = get();
c.v = 1; int val2 = get();
assertEquals(val1, 0);
assertEquals(val2, 1);
}
}
/* ==================================================== */
static class IntStable {
public @Stable int v;
public static final IntStable c = new IntStable();
public static int get() { return c.v; }
public static void test() throws Exception {
c.v = 1; int val1 = get();
c.v = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, (isStableEnabled ? 1 : 2));
}
}
/* ==================================================== */
static class DefaultStaticValue {
public static @Stable int v;
public static final DefaultStaticValue c = new DefaultStaticValue();
public static int get() { return c.v; }
public static void test() throws Exception {
int val1 = get();
c.v = 1; int val2 = get();
assertEquals(val1, 0);
assertEquals(val2, 1);
}
}
/* ==================================================== */
static class StaticIntStable {
public static @Stable int v;
public static final StaticIntStable c = new StaticIntStable();
public static int get() { return c.v; }
public static void test() throws Exception {
c.v = 1; int val1 = get();
c.v = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, (isStableEnabled ? 1 : 2));
}
}
/* ==================================================== */
static class VolatileIntStable {
public @Stable volatile int v;
public static final VolatileIntStable c = new VolatileIntStable();
public static int get() { return c.v; }
public static void test() throws Exception {
c.v = 1; int val1 = get();
c.v = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, (isStableEnabled ? 1 : 2));
}
}
/* ==================================================== */
// @Stable array == field && all components are stable
static class IntArrayDim1 {
public @Stable int[] v;
public static final IntArrayDim1 c = new IntArrayDim1();
public static int get() { return c.v[0]; }
public static int get1() { return c.v[10]; }
public static int[] get2() { return c.v; }
public static void test() throws Exception {
{
c.v = new int[1]; c.v[0] = 1; int val1 = get();
c.v[0] = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, (isServerWithStable ? 1 : 2));
c.v = new int[1]; c.v[0] = 3; int val3 = get();
assertEquals(val3, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 3));
}
{
c.v = new int[20]; c.v[10] = 1; int val1 = get1();
c.v[10] = 2; int val2 = get1();
assertEquals(val1, 1);
assertEquals(val2, (isServerWithStable ? 1 : 2));
c.v = new int[20]; c.v[10] = 3; int val3 = get1();
assertEquals(val3, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 3));
}
{
c.v = new int[1]; int[] val1 = get2();
c.v = new int[1]; int[] val2 = get2();
assertTrue((isStableEnabled ? (val1 == val2) : (val1 != val2)));
}
}
}
/* ==================================================== */
static class IntArrayDim2 {
public @Stable int[][] v;
public static final IntArrayDim2 c = new IntArrayDim2();
public static int get() { return c.v[0][0]; }
public static int[] get1() { return c.v[0]; }
public static int[][] get2() { return c.v; }
public static void test() throws Exception {
{
c.v = new int[1][1]; c.v[0][0] = 1; int val1 = get();
c.v[0][0] = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, (isServerWithStable ? 1 : 2));
c.v = new int[1][1]; c.v[0][0] = 3; int val3 = get();
assertEquals(val3, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 3));
c.v[0] = new int[1]; c.v[0][0] = 4; int val4 = get();
assertEquals(val4, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 4));
}
{
c.v = new int[1][1]; int[] val1 = get1();
c.v[0] = new int[1]; int[] val2 = get1();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[1][1]; int[][] val1 = get2();
c.v = new int[1][1]; int[][] val2 = get2();
assertTrue((isStableEnabled ? (val1 == val2) : (val1 != val2)));
}
}
}
/* ==================================================== */
static class IntArrayDim3 {
public @Stable int[][][] v;
public static final IntArrayDim3 c = new IntArrayDim3();
public static int get() { return c.v[0][0][0]; }
public static int[] get1() { return c.v[0][0]; }
public static int[][] get2() { return c.v[0]; }
public static int[][][] get3() { return c.v; }
public static void test() throws Exception {
{
c.v = new int[1][1][1]; c.v[0][0][0] = 1; int val1 = get();
c.v[0][0][0] = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, (isServerWithStable ? 1 : 2));
c.v = new int[1][1][1]; c.v[0][0][0] = 3; int val3 = get();
assertEquals(val3, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 3));
c.v[0] = new int[1][1]; c.v[0][0][0] = 4; int val4 = get();
assertEquals(val4, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 4));
c.v[0][0] = new int[1]; c.v[0][0][0] = 5; int val5 = get();
assertEquals(val5, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 5));
}
{
c.v = new int[1][1][1]; int[] val1 = get1();
c.v[0][0] = new int[1]; int[] val2 = get1();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[1][1][1]; int[][] val1 = get2();
c.v[0] = new int[1][1]; int[][] val2 = get2();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[1][1][1]; int[][][] val1 = get3();
c.v = new int[1][1][1]; int[][][] val2 = get3();
assertTrue((isStableEnabled ? (val1 == val2) : (val1 != val2)));
}
}
}
/* ==================================================== */
static class IntArrayDim4 {
public @Stable int[][][][] v;
public static final IntArrayDim4 c = new IntArrayDim4();
public static int get() { return c.v[0][0][0][0]; }
public static int[] get1() { return c.v[0][0][0]; }
public static int[][] get2() { return c.v[0][0]; }
public static int[][][] get3() { return c.v[0]; }
public static int[][][][] get4() { return c.v; }
public static void test() throws Exception {
{
c.v = new int[1][1][1][1]; c.v[0][0][0][0] = 1; int val1 = get();
c.v[0][0][0][0] = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, (isServerWithStable ? 1 : 2));
c.v = new int[1][1][1][1]; c.v[0][0][0][0] = 3; int val3 = get();
assertEquals(val3, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 3));
c.v[0] = new int[1][1][1]; c.v[0][0][0][0] = 4; int val4 = get();
assertEquals(val4, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 4));
c.v[0][0] = new int[1][1]; c.v[0][0][0][0] = 5; int val5 = get();
assertEquals(val5, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 5));
c.v[0][0][0] = new int[1]; c.v[0][0][0][0] = 6; int val6 = get();
assertEquals(val6, (isStableEnabled ? (isServerWithStable ? 1 : 2)
: 6));
}
{
c.v = new int[1][1][1][1]; int[] val1 = get1();
c.v[0][0][0] = new int[1]; int[] val2 = get1();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[1][1][1][1]; int[][] val1 = get2();
c.v[0][0] = new int[1][1]; int[][] val2 = get2();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[1][1][1][1]; int[][][] val1 = get3();
c.v[0] = new int[1][1][1]; int[][][] val2 = get3();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[1][1][1][1]; int[][][][] val1 = get4();
c.v = new int[1][1][1][1]; int[][][][] val2 = get4();
assertTrue((isStableEnabled ? (val1 == val2) : (val1 != val2)));
}
}
}
/* ==================================================== */
// Dynamic Dim is higher than static
static class ObjectArrayLowerDim0 {
public @Stable Object v;
public static final ObjectArrayLowerDim0 c = new ObjectArrayLowerDim0();
public static int get() { return ((int[])c.v)[0]; }
public static int[] get1() { return (int[])c.v; }
public static void test() throws Exception {
{
c.v = new int[1]; ((int[])c.v)[0] = 1; int val1 = get();
((int[])c.v)[0] = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, 2);
}
{
c.v = new int[1]; int[] val1 = get1();
c.v = new int[1]; int[] val2 = get1();
assertTrue((isStableEnabled ? (val1 == val2) : (val1 != val2)));
}
}
}
/* ==================================================== */
static class ObjectArrayLowerDim1 {
public @Stable Object[] v;
public static final ObjectArrayLowerDim1 c = new ObjectArrayLowerDim1();
public static int get() { return ((int[][])c.v)[0][0]; }
public static int[] get1() { return (int[])(c.v[0]); }
public static Object[] get2() { return c.v; }
public static void test() throws Exception {
{
c.v = new int[1][1]; ((int[][])c.v)[0][0] = 1; int val1 = get();
((int[][])c.v)[0][0] = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, 2);
}
{
c.v = new int[1][1]; c.v[0] = new int[0]; int[] val1 = get1();
c.v[0] = new int[0]; int[] val2 = get1();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[0][0]; Object[] val1 = get2();
c.v = new int[0][0]; Object[] val2 = get2();
assertTrue((isStableEnabled ? (val1 == val2) : (val1 != val2)));
}
}
}
/* ==================================================== */
static class ObjectArrayLowerDim2 {
public @Stable Object[][] v;
public static final ObjectArrayLowerDim2 c = new ObjectArrayLowerDim2();
public static int get() { return ((int[][][])c.v)[0][0][0]; }
public static int[] get1() { return (int[])(c.v[0][0]); }
public static int[][] get2() { return (int[][])(c.v[0]); }
public static Object[][] get3() { return c.v; }
public static void test() throws Exception {
{
c.v = new int[1][1][1]; ((int[][][])c.v)[0][0][0] = 1; int val1 = get();
((int[][][])c.v)[0][0][0] = 2; int val2 = get();
assertEquals(val1, 1);
assertEquals(val2, 2);
}
{
c.v = new int[1][1][1]; c.v[0][0] = new int[0]; int[] val1 = get1();
c.v[0][0] = new int[0]; int[] val2 = get1();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[1][1][1]; c.v[0] = new int[0][0]; int[][] val1 = get2();
c.v[0] = new int[0][0]; int[][] val2 = get2();
assertTrue((isServerWithStable ? (val1 == val2) : (val1 != val2)));
}
{
c.v = new int[0][0][0]; Object[][] val1 = get3();
c.v = new int[0][0][0]; Object[][] val2 = get3();
assertTrue((isStableEnabled ? (val1 == val2) : (val1 != val2)));
}
}
}
/* ==================================================== */
static class NestedStableField {
static class A {
public @Stable int a;
}
public @Stable A v;
public static final NestedStableField c = new NestedStableField();
public static A get() { return c.v; }
public static int get1() { return get().a; }
public static void test() throws Exception {
{
c.v = new A(); c.v.a = 1; A val1 = get();
c.v.a = 2; A val2 = get();
assertEquals(val1.a, 2);
assertEquals(val2.a, 2);
}
{
c.v = new A(); c.v.a = 1; int val1 = get1();
c.v.a = 2; int val2 = get1();
c.v = new A(); c.v.a = 3; int val3 = get1();
assertEquals(val1, 1);
assertEquals(val2, (isStableEnabled ? 1 : 2));
assertEquals(val3, (isStableEnabled ? 1 : 3));
}
}
}
/* ==================================================== */
static class NestedStableField1 {
static class A {
public @Stable int a;
public @Stable A next;
}
public @Stable A v;
public static final NestedStableField1 c = new NestedStableField1();
public static A get() { return c.v.next.next.next.next.next.next.next; }
public static int get1() { return get().a; }
public static void test() throws Exception {
{
c.v = new A(); c.v.next = new A(); c.v.next.next = c.v;
c.v.a = 1; c.v.next.a = 1; A val1 = get();
c.v.a = 2; c.v.next.a = 2; A val2 = get();
assertEquals(val1.a, 2);
assertEquals(val2.a, 2);
}
{
c.v = new A(); c.v.next = c.v;
c.v.a = 1; int val1 = get1();
c.v.a = 2; int val2 = get1();
c.v = new A(); c.v.next = c.v;
c.v.a = 3; int val3 = get1();
assertEquals(val1, 1);
assertEquals(val2, (isStableEnabled ? 1 : 2));
assertEquals(val3, (isStableEnabled ? 1 : 3));
}
}
}
/* ==================================================== */
static class NestedStableField2 {
static class A {
public @Stable int a;
public @Stable A left;
public A right;
}
public @Stable A v;
public static final NestedStableField2 c = new NestedStableField2();
public static int get() { return c.v.left.left.left.a; }
public static int get1() { return c.v.left.left.right.left.a; }
public static void test() throws Exception {
{
c.v = new A(); c.v.left = c.v.right = c.v;
c.v.a = 1; int val1 = get(); int val2 = get1();
c.v.a = 2; int val3 = get(); int val4 = get1();
assertEquals(val1, 1);
assertEquals(val3, (isStableEnabled ? 1 : 2));
assertEquals(val2, 1);
assertEquals(val4, 2);
}
}
}
/* ==================================================== */
static class NestedStableField3 {
static class A {
public @Stable int a;
public @Stable A[] left;
public A[] right;
}
public @Stable A[] v;
public static final NestedStableField3 c = new NestedStableField3();
public static int get() { return c.v[0].left[1].left[0].left[1].a; }
public static int get1() { return c.v[1].left[0].left[1].right[0].left[1].a; }
public static void test() throws Exception {
{
A elem = new A();
c.v = new A[] { elem, elem }; c.v[0].left = c.v[0].right = c.v;
elem.a = 1; int val1 = get(); int val2 = get1();
elem.a = 2; int val3 = get(); int val4 = get1();
assertEquals(val1, 1);
assertEquals(val3, (isServerWithStable ? 1 : 2));
assertEquals(val2, 1);
assertEquals(val4, 2);
}
}
}
/* ==================================================== */
// Auxiliary methods
static void assertEquals(int i, int j) { if (i != j) throw new AssertionError(i + " != " + j); }
static void assertTrue(boolean b) { if (!b) throw new AssertionError(); }
static boolean failed = false;
public static void run(Class<?> test) {
Throwable ex = null;
System.out.print(test.getName()+": ");
try {
test.getMethod("test").invoke(null);
} catch (InvocationTargetException e) {
ex = e.getCause();
} catch (Throwable e) {
ex = e;
} finally {
if (ex == null) {
System.out.println("PASSED");
} else {
failed = true;
System.out.println("FAILED");
ex.printStackTrace(System.out);
}
}
}
}