1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18 public class Main { 19 public static void main(String[] args) { 20 arraycopy(); 21 try { 22 arraycopy(new Object()); 23 throw new Error("Should not be here"); 24 } catch (ArrayStoreException ase) { 25 // Ignore. 26 } 27 try { 28 arraycopy(null); 29 throw new Error("Should not be here"); 30 } catch (NullPointerException npe) { 31 // Ignore. 32 } 33 34 try { 35 arraycopy(new Object[1]); 36 throw new Error("Should not be here"); 37 } catch (ArrayIndexOutOfBoundsException aiooe) { 38 // Ignore. 39 } 40 41 arraycopy(new Object[2]); 42 arraycopy(new Object[2], 0); 43 44 try { 45 arraycopy(new Object[1], 1); 46 throw new Error("Should not be here"); 47 } catch (ArrayIndexOutOfBoundsException aiooe) { 48 // Ignore. 49 } 50 } 51 52 /// CHECK-START-X86_64: void Main.arraycopy() disassembly (after) 53 /// CHECK: InvokeStaticOrDirect intrinsic:SystemArrayCopy 54 /// CHECK-NOT: test {{^[^\[].*}}, {{^[^\[].*}} 55 /// CHECK-NOT: call 56 /// CHECK: ReturnVoid 57 // Checks that the call is intrinsified and that there is no register test instruction 58 // when we know the source and destination are not null. 59 public static void arraycopy() { 60 Object[] obj = new Object[4]; 61 System.arraycopy(obj, 1, obj, 0, 1); 62 } 63 64 public static void arraycopy(Object obj) { 65 System.arraycopy(obj, 1, obj, 0, 1); 66 } 67 68 // Test case for having enough registers on x86 for the arraycopy intrinsic. 69 /// CHECK-START-X86: void Main.arraycopy(java.lang.Object[], int) disassembly (after) 70 /// CHECK: InvokeStaticOrDirect intrinsic:SystemArrayCopy 71 /// CHECK-NOT: mov {{[a-z]+}}, [esp + {{[0-9]+}}] 72 /// CHECK: ReturnVoid 73 public static void arraycopy(Object[] obj, int pos) { 74 System.arraycopy(obj, pos, obj, 0, obj.length); 75 } 76 77 // Test case for having enough registers on x86 for the arraycopy intrinsic 78 // when an input is passed twice. 79 /// CHECK-START-X86: int Main.arraycopy2(java.lang.Object[], int) disassembly (after) 80 /// CHECK: InvokeStaticOrDirect intrinsic:SystemArrayCopy 81 /// CHECK-NOT: mov {{[a-z]+}}, [esp + {{[0-9]+}}] 82 /// CHECK: Return 83 public static int arraycopy2(Object[] obj, int pos) { 84 System.arraycopy(obj, pos, obj, pos - 1, obj.length); 85 return pos; 86 } 87 88 // Test case for not having enough registers on x86. The arraycopy intrinsic 89 // will ask for length to be in stack and load it. 90 /// CHECK-START-X86: int Main.arraycopy3(java.lang.Object[], java.lang.Object[], int, int, int) disassembly (after) 91 /// CHECK: InvokeStaticOrDirect intrinsic:SystemArrayCopy 92 /// CHECK: mov {{[a-z]+}}, [esp + {{[0-9]+}}] 93 /// CHECK: Return 94 public static int arraycopy3(Object[] obj1, Object[] obj2, int input1, int input3, int input4) { 95 System.arraycopy(obj1, input1, obj2, input3, input4); 96 System.out.println(obj1); 97 System.out.println(obj2); 98 return input1 + input3 + input4; 99 } 100 } 101
