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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
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* 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 org.graalvm.compiler.core.test;
import java.lang.reflect.Field;
import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
import org.graalvm.compiler.options.OptionValues;
import org.graalvm.compiler.phases.common.CanonicalizerPhase;
import org.graalvm.compiler.phases.tiers.PhaseContext;
import org.graalvm.compiler.virtual.phases.ea.PartialEscapePhase;
import org.junit.Test;
public class UnsafeVirtualizationTest extends GraalCompilerTest {
public static class A {
int f1;
int f2;
}
private static final long AF1Offset;
private static final long AF2Offset;
static {
long o1 = -1;
long o2 = -1;
try {
Field f1 = A.class.getDeclaredField("f1");
Field f2 = A.class.getDeclaredField("f2");
o1 = UNSAFE.objectFieldOffset(f1);
o2 = UNSAFE.objectFieldOffset(f2);
} catch (NoSuchFieldException | SecurityException e) {
throw new AssertionError(e);
}
AF1Offset = o1;
AF2Offset = o2;
}
public static int unsafeSnippet0(int i1, int i2) {
A a = new A();
UNSAFE.putDouble(a, AF1Offset, i1 + i2);
return UNSAFE.getInt(a, AF1Offset) + UNSAFE.getInt(a, AF2Offset);
}
public static int unsafeSnippet1(int i1, int i2) {
A a = new A();
UNSAFE.putDouble(a, AF1Offset, i1 + i2);
a.f2 = i1;
return (int) UNSAFE.getDouble(a, AF1Offset);
}
@Test
public void testUnsafePEA01() {
testPartialEscapeReadElimination(parseEager("unsafeSnippet0", AllowAssumptions.NO), false);
testPartialEscapeReadElimination(parseEager("unsafeSnippet0", AllowAssumptions.NO), true);
}
@Test
public void testUnsafePEA02() {
testPartialEscapeReadElimination(parseEager("unsafeSnippet1", AllowAssumptions.NO), false);
testPartialEscapeReadElimination(parseEager("unsafeSnippet1", AllowAssumptions.NO), true);
}
public void testPartialEscapeReadElimination(StructuredGraph graph, boolean canonicalizeBefore) {
OptionValues options = graph.getOptions();
PhaseContext context = getDefaultHighTierContext();
CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
if (canonicalizeBefore) {
canonicalizer.apply(graph, context);
}
new PartialEscapePhase(true, true, canonicalizer, null, options).apply(graph, context);
}
}