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*
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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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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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*/
/*
* @test
* @bug 8076188
* @summary arraycopy to non escaping destination may be eliminated
* @library /
*
* @run main/othervm -ea -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
* -XX:CompileCommand=dontinline,compiler.arraycopy.TestEliminateArrayCopy*::m*
* compiler.arraycopy.TestEliminateArrayCopy
*
*/
package compiler.arraycopy;
public class TestEliminateArrayCopy {
static class CloneTests extends TestInstanceCloneUtils {
// object allocation and ArrayCopyNode should be eliminated
static void m1(E src) throws CloneNotSupportedException {
src.clone();
}
// both object allocations and ArrayCopyNode should be eliminated
static void m2(Object dummy) throws CloneNotSupportedException {
E src = new E(false);
src.clone();
}
// object allocation and ArrayCopyNode should be eliminated. Fields should be loaded from src.
static int m3(E src) throws CloneNotSupportedException {
E dest = (E)src.clone();
return dest.i1 + dest.i2 + dest.i3 + dest.i4 + dest.i5 +
dest.i6 + dest.i7 + dest.i8 + dest.i9;
}
}
static class ArrayCopyTests extends TestArrayCopyUtils {
// object allocation and ArrayCopyNode should be eliminated.
@Args(src=ArraySrc.LARGE)
static int m1() throws CloneNotSupportedException {
int[] array_clone = (int[])large_int_src.clone();
return array_clone[0] + array_clone[1] + array_clone[2] +
array_clone[3] + array_clone[4] + array_clone[5] +
array_clone[6] + array_clone[7] + array_clone[8] +
array_clone[9];
}
// object allocation and ArrayCopyNode should be eliminated.
@Args(src=ArraySrc.LARGE)
static int m2() {
int[] dest = new int[10];
System.arraycopy(large_int_src, 0, dest, 0, 10);
return dest[0] + dest[1] + dest[2] + dest[3] + dest[4] +
dest[5] + dest[6] + dest[7] + dest[8] + dest[9];
}
// object allocations and ArrayCopyNodes should be eliminated.
@Args(src=ArraySrc.LARGE)
static int m3() {
int[] dest1 = new int[10];
System.arraycopy(large_int_src, 0, dest1, 0, 10);
int[] dest2 = new int[10];
System.arraycopy(dest1, 0, dest2, 0, 10);
return dest2[0] + dest2[1] + dest2[2] + dest2[3] + dest2[4] +
dest2[5] + dest2[6] + dest2[7] + dest2[8] + dest2[9];
}
static class m4_class {
Object f;
}
static void m4_helper() {}
// allocations eliminated and arraycopy optimized out
@Args(src=ArraySrc.LARGE)
static int m4() {
int[] dest = new int[10];
m4_class o = new m4_class();
o.f = dest;
m4_helper();
System.arraycopy(large_int_src, 0, o.f, 0, 10);
return dest[0] + dest[1] + dest[2] + dest[3] + dest[4] +
dest[5] + dest[6] + dest[7] + dest[8] + dest[9];
}
static void m5_helper() {}
// Small copy cannot be converted to loads/stores because
// allocation is not close enough to arraycopy but arraycopy
// itself can be eliminated
@Args(src=ArraySrc.SMALL, dst=ArrayDst.NEW)
static void m5(A[] src, A[] dest) {
A[] temp = new A[5];
m5_helper();
System.arraycopy(src, 0, temp, 0, 5);
dest[0] = temp[0];
dest[1] = temp[1];
dest[2] = temp[2];
dest[3] = temp[3];
dest[4] = temp[4];
}
// object allocation and ArrayCopyNode should be eliminated.
@Args(src=ArraySrc.LARGE)
static int m6(int [] src) {
int res = src[0] + src[1] + src[2] + src[3] + src[4] +
src[5] + src[6] + src[7] + src[8] + src[9];
int[] dest = new int[10];
System.arraycopy(src, 0, dest, 0, 10);
res += dest[0] + dest[1] + dest[2] + dest[3] + dest[4] +
dest[5] + dest[6] + dest[7] + dest[8] + dest[9];
return res/2;
}
@Args(src=ArraySrc.LARGE)
static int m7() {
int[] dest = new int[10];
dest[0] = large_int_src[8];
dest[1] = large_int_src[9];
System.arraycopy(large_int_src, 0, dest, 2, 8);
return dest[0] + dest[1] + dest[2] + dest[3] + dest[4] +
dest[5] + dest[6] + dest[7] + dest[8] + dest[9];
}
}
// test that OptimizePtrCompare still works
static final Object[] m1_array = new Object[10];
static boolean m1_array_null_element = false;
static void m1(int i) {
Object[] array_clone = (Object[])m1_array.clone();
if (array_clone[i] == null) {
m1_array_null_element = true;
}
}
static public void main(String[] args) throws Exception {
CloneTests clone_tests = new CloneTests();
clone_tests.doTest(clone_tests.e, "m1");
clone_tests.doTest(null, "m2");
clone_tests.doTest(clone_tests.e, "m3");
ArrayCopyTests ac_tests = new ArrayCopyTests();
ac_tests.doTest("m1");
ac_tests.doTest("m2");
ac_tests.doTest("m3");
ac_tests.doTest("m4");
ac_tests.doTest("m5");
ac_tests.doTest("m6");
ac_tests.doTest("m7");
if (!clone_tests.success || !ac_tests.success) {
throw new RuntimeException("some tests failed");
}
// Make sure both branches of the if in m1() appear taken
for (int i = 0; i < 7000; i++) {
m1(0);
}
m1_array[0] = new Object();
for (int i = 0; i < 20000; i++) {
m1(0);
}
m1_array_null_element = false;
m1(0);
if (m1_array_null_element) {
throw new RuntimeException("OptimizePtrCompare test failed");
}
}
}