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* 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
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*
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* 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.
*
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*/
/**
* @test
* @bug 8238178
* @summary Checks the C1 RangeCheckEliminator::Verification code for nested exceptions in loops that are always executed once on the non-exceptional path.
*
* @run main/othervm -Xbatch -XX:TieredStopAtLevel=1 -XX:CompileCommand=dontinline,compiler.c1.RangeCheckVerificationOfIR::throwException*
* -XX:CompileCommand=dontinline,compiler.c1.RangeCheckVerificationOfIR::test* compiler.c1.RangeCheckVerificationOfIR
*/
package compiler.c1;
public class RangeCheckVerificationOfIR {
int a;
int i1;
int i2;
int i3;
public static void main(String[] args) {
RangeCheckVerificationOfIR instance = new RangeCheckVerificationOfIR();
instance.resetValues();
for (int i = 0; i < 1000; i++) {
instance.testSimple();
instance.resetValues();
instance.testDominatedByXhandler();
instance.resetValues();
instance.testThrowOneException();
instance.resetValues();
instance.testNestedExceptions();
instance.resetValues();
instance.testTriplyNestedExceptions();
instance.resetValues();
instance.testTriplyNestedExceptions2();
instance.resetValues();
instance.testTriplyNestedMultipleHandlers();
instance.resetValues();
instance.testTriplyNestedNoExceptionThrown();
instance.resetValues();
}
}
private void resetValues() {
i1 = 0;
i2 = 0;
i3 = 0;
}
// Is handled by current code (xhandler equals a pred of loop header block)
public void testSimple() {
int[] iArr = new int[8];
for (int i = 0; i < 8; i++) {
iArr[0] = 4;
}
while (true) {
try {
throwException();
break;
} catch(Exception ex1) {
i1++;
}
}
for (int i = 0; i < 10; i++) {
a = 5;
}
}
// Is handled by current code (xhandler dominates a pred of loop header block)
public void testDominatedByXhandler() {
int[] iArr = new int[8];
for (int i = 0; i < 8; i++) {
iArr[0] = 4;
}
while (true) {
try {
throwException();
break;
} catch (Exception ex1) {
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
i1++;
}
}
for (int i = 0; i < 10; i++) {
a = 5;
}
}
// Not a problem, since no backbranch and therefore no loop
public void testThrowOneException() {
int[] iArr = new int[8];
for (int i = 0; i < 8; i++) {
iArr[0] = 4;
}
try {
for (int i = 0; i < iArr[4]; i++) {
throwException();
}
} catch (Exception ex) {
a = 345;
}
try {
while (true) {
throwException();
break;
}
} catch (Exception e) {
a = 45;
}
for (int i = 0; i < 10; i++) {
a = 5;
}
}
// All following cases are not handled yet. Need to walk backbranch of loop header block
// to find one of the exception handlers of loop header block somewhere. Must exist.
public void testNestedExceptions() {
int[] iArr = new int[8];
for (int i = 0; i < 8; i++) {
iArr[0] = 4;
}
// The block from the backbranch, lets say B, is no xhandler block and not dominated by either of the two xhandler blocks, lets say
// E1 for the outer and E2 for the inner try/catch block: If no exception occurs in E1, then E1 is completely executed without
// executing E2. But if an exception occurs, then only parts of E1 is executed and E2 is executed completely.
// Therefore, neither of them dominates B.
while (true) {
try {
throwException();
break;
} catch (Exception ex1) {
i1++;
try {
throwException2();
} catch (Exception ex2) {
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
i2++;
}
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
i1++;
}
}
for (int i = 0; i < 10; i++) {
a = 5;
}
}
public void testTriplyNestedExceptions() {
int[] iArr = new int[8];
for (int i = 0; i < 8; i++) {
iArr[0] = 4;
}
while (true) {
try {
throwException();
break;
} catch (Exception ex1) {
i1++;
try {
throwException2();
} catch (Exception ex2) {
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
try {
throwException3();
} catch (Exception ex3) {
i3++;
}
try {
throwException3();
} catch (Exception ex3) {
i3++;
}
i2++;
}
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
i1++;
}
}
for (int i = 0; i < 10; i++) {
a = 5;
}
}
public void testTriplyNestedExceptions2() {
int[] iArr = new int[8];
for (int i = 0; i < 8; i++) {
iArr[0] = 4;
}
try {
for (int i = 0; i < iArr[4]; i++) {
throwException();
}
} catch (Exception ex) {
a = 345;
}
while (true) {
try {
throwException();
break;
} catch (Exception ex1) {
i1++;
try {
throwException2();
} catch (Exception ex2) {
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
try {
throwException3();
} catch (Exception ex3) {
i3++;
}
try {
throwException3();
} catch (Exception ex3) {
i3++;
}
i2++;
}
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
i1++;
}
}
for (int i = 0; i < 10; i++) {
a = 5;
}
}
public void testTriplyNestedMultipleHandlers() {
int[] iArr = new int[8];
for (int i = 0; i < 8; i++) {
iArr[0] = 4;
}
try {
for (int i = 0; i < iArr[4]; i++) {
throwException();
}
} catch (Exception ex) {
a = 345;
}
try {
while (true) {
try {
throwException();
break;
} catch (MyInnerException ie) {
i1++;
try {
throwException2();
} catch (Exception ex2) {
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
try {
throwException3();
} catch (Exception ex3) {
i3++;
}
try {
throwException3();
} catch (Exception ex3) {
i3++;
}
i2++;
}
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
i1++;
}
}
} catch (MyOuterException oe) {
a = 45;
}
for (int i = 0; i < 10; i++) {
a = 5;
}
}
public void testTriplyNestedNoExceptionThrown() {
int[] iArr = new int[8];
for (int i = 0; i < 8; i++) {
iArr[0] = 4;
}
try {
for (int i = 0; i < iArr[4]; i++) {
throwException();
}
} catch (Exception ex) {
a = 345;
}
try {
while (true) {
try {
a = 4;
break;
} catch (RuntimeException ie) {
i1++;
try {
throwException2();
} catch (Exception ex2) {
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
try {
throwException3();
} catch (Exception ex3) {
i3++;
}
try {
throwException3();
} catch (Exception ex3) {
i3++;
}
i2++;
}
if (i1 < i2) {
a = 3;
} else {
a = 4;
}
i1++;
}
}
} catch (Exception e) {
a = 45;
}
for (int i = 0; i < 10; i++) {
a = 5;
}
}
void throwException() throws MyInnerException, MyOuterException {
if (i1 < 3) {
throw new MyInnerException();
}
if (i1 < 5) {
throw new MyOuterException();
}
}
public void throwException2() throws Exception {
if (i2 < 3) {
throw new RuntimeException();
}
}
public void throwException3() throws Exception {
if (i3 < 2) {
throw new RuntimeException();
}
}
class MyInnerException extends Exception { }
class MyOuterException extends Exception { }
}