/*
* Copyright ( C ) 2015 The Android Open Source Project
*
* Licensed under the Apache License , Version 2 . 0 ( the " License " ) ;
* you may not use this file except in compliance with the License .
* You may obtain a copy of the License at
*
* http : //www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing , software
* distributed under the License is distributed on an " AS IS " BASIS ,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND , either express or implied .
* See the License for the specific language governing permissions and
* limitations under the License .
*/
/**
* Regression test on duplicate removal of same bounds check .
*/
public class Main {
/// CHECK-START: void Main.doit1(int[]) BCE (before)
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
//
/// CHECK-START: void Main.doit1(int[]) BCE (after)
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
//
/// CHECK-START: void Main.doit1(int[]) BCE (after)
/// CHECK-NOT: Deoptimize
public static void doit1(int [] a) {
a[a.length-3 ] = 1 ;
a[a.length-2 ] = 2 ;
a[a.length-1 ] = 3 ;
// This introduces a problematic BoundsCheck(x,x) node
// (1) certain OOB, so should be rejected
// (2) exposed bug in removing same BC twice if (1) would not be done.
a[a.length-0 ] = 4 ;
}
/// CHECK-START: void Main.doit2(int[]) BCE (before)
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
/// CHECK-DAG: BoundsCheck
//
/// CHECK-START: void Main.doit2(int[]) BCE (after)
/// CHECK-DAG: Deoptimize
/// CHECK-DAG: Deoptimize
//
/// CHECK-START: void Main.doit2(int[]) BCE (after)
/// CHECK-NOT: BoundsCheck
public static void doit2(int [] a) {
a[a.length-4 ] = -101 ;
a[a.length-3 ] = -102 ;
a[a.length-2 ] = -103 ;
a[a.length-1 ] = -104 ;
}
public static void main(String[] args) {
int [] a = new int [4 ];
int fail = 0 ;
try {
doit1(a);
} catch (ArrayIndexOutOfBoundsException e) {
fail++;
}
expectEquals(1 , fail);
expectEquals(0 , a[0 ]);
expectEquals(1 , a[1 ]);
expectEquals(2 , a[2 ]);
expectEquals(3 , a[3 ]);
try {
doit2(a);
} catch (ArrayIndexOutOfBoundsException e) {
fail++;
}
expectEquals(1 , fail);
expectEquals(-101 , a[0 ]);
expectEquals(-102 , a[1 ]);
expectEquals(-103 , a[2 ]);
expectEquals(-104 , a[3 ]);
System.out.println("passed" );
}
private static void expectEquals(int expected, int result) {
if (expected != result) {
throw new Error("Expected: " + expected + ", found: " + result);
}
}
}
Messung V0.5 in Prozent C=90 H=90 G=90
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-06-29)
¤
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