/*
* Copyright ( C ) 2019 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 .
*/
/**
* Test code generation for BoundsCheck .
*/
public class Main {
// Constant index, variable length.
/// CHECK-START-ARM64: int Main.constantIndex(int[]) disassembly (after)
/// CHECK: BoundsCheck
/// CHECK: cmp {{w\d+}}, #0x0
/// CHECK: b.ls #+0x{{[0-9a-f]+}} (addr 0x<<SLOW:[0-9a-f]+>>)
/// CHECK: BoundsCheckSlowPathARM64
/// CHECK-NEXT: 0x<<SLOW>>:
/// CHECK-START-ARM: int Main.constantIndex(int[]) disassembly (after)
/// CHECK: BoundsCheck
/// CHECK: cmp {{r\d+}}, #0
/// CHECK: bls.w <<SLOW:0x[0-9a-f]+>>
/// CHECK: BoundsCheckSlowPathARMVIXL
/// CHECK-NEXT: <<SLOW>>:
public static int constantIndex(int [] a) {
try {
a[0 ] = 42 ;
} catch (ArrayIndexOutOfBoundsException expected) {
return -1 ;
}
return a.length;
}
// Constant length, variable index.
/// CHECK-START-ARM64: int Main.constantLength(int) disassembly (after)
/// CHECK: BoundsCheck
/// CHECK: cmp {{w\d+}}, #0xa
/// CHECK: b.hs #+0x{{[0-9a-f]+}} (addr 0x<<SLOW:[0-9a-f]+>>)
/// CHECK: BoundsCheckSlowPathARM64
/// CHECK-NEXT: 0x<<SLOW>>:
/// CHECK-START-ARM: int Main.constantLength(int) disassembly (after)
/// CHECK: BoundsCheck
/// CHECK: cmp {{r\d+}}, #10
/// CHECK: bcs.w <<SLOW:0x[0-9a-f]+>>
/// CHECK: BoundsCheckSlowPathARMVIXL
/// CHECK-NEXT: <<SLOW>>:
public static int constantLength(int index) {
int [] a = new int [10 ];
try {
a[index] = 1 ;
} catch (ArrayIndexOutOfBoundsException expected) {
return -1 ;
}
return index;
}
// Constant index and length, out of bounds access. Check that we only have
// the slow path.
/// CHECK-START-ARM64: int Main.constantIndexAndLength() disassembly (after)
/// CHECK: BoundsCheck
/// CHECK-NOT: cmp
/// CHECK: b #+0x{{[0-9a-f]+}} (addr 0x<<SLOW:[0-9a-f]+>>)
/// CHECK: BoundsCheckSlowPathARM64
/// CHECK-NEXT: 0x<<SLOW>>:
/// CHECK-START-ARM: int Main.constantIndexAndLength() disassembly (after)
/// CHECK: BoundsCheck
/// CHECK-NOT: cmp
/// CHECK: b <<SLOW:0x[0-9a-f]+>>
/// CHECK: BoundsCheckSlowPathARMVIXL
/// CHECK-NEXT: <<SLOW>>:
public static int constantIndexAndLength() {
try {
int [] a = new int [5 ];
a[10 ] = 42 ;
} catch (ArrayIndexOutOfBoundsException expected) {
return -1 ;
}
return 0 ;
}
public static void main(String[] args) {
int [] a = new int [10 ];
int [] b = new int [0 ];
expectEquals(a.length, constantIndex(a));
expectEquals(-1 , constantIndex(b));
expectEquals(0 , constantLength(0 ));
expectEquals(9 , constantLength(9 ));
expectEquals(-1 , constantLength(10 ));
expectEquals(-1 , constantLength(-2 ));
expectEquals(-1 , constantIndexAndLength());
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=83 H=75 G=78
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-06-29)
¤
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