1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
* 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
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8076188 8246153 8248226
* @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
* @run main/othervm -ea -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
* -XX:+IgnoreUnrecognizedVMOptions -XX:+StressReflectiveCode
* -XX:CompileCommand=dontinline,compiler.arraycopy.TestEliminateArrayCopy*::m*
* compiler.arraycopy.TestEliminateArrayCopy
* @run main/othervm -ea -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
* -XX:+IgnoreUnrecognizedVMOptions -XX:+StressReflectiveCode
* -XX:-ReduceInitialCardMarks -XX:-ReduceBulkZeroing
* -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");
}
}
}
|
