1 /*
2 * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 import java.lang.runtime.CodeReflection;
25
26 /*
27 * @test
28 * @summary test lowering of loops
29 * @build TestLoop
30 * @build CodeReflectionTester
31 * @run main CodeReflectionTester TestLoop
32 */
33
34 public class TestLoop {
35 @CodeReflection
36 @LoweredModel(value = """
37 func @"testFor" (%0 : int[])int -> {
38 %1 : Var<int[]> = var %0 @"a";
39 %2 : int = constant @"0";
40 %3 : Var<int> = var %2 @"sum";
41 %4 : int = constant @"0";
42 %5 : Var<int> = var %4 @"i";
43 branch ^block_0;
44
45 ^block_0:
46 %6 : int = var.load %5;
47 %7 : int[] = var.load %1;
48 %8 : int = array.length %7;
49 %9 : boolean = lt %6 %8;
50 cbranch %9 ^block_1 ^block_2;
51
52 ^block_1:
53 %10 : int = var.load %3;
54 %11 : int[] = var.load %1;
55 %12 : int = var.load %5;
56 %13 : int = array.load %11 %12;
57 %14 : int = add %10 %13;
58 var.store %3 %14;
59 branch ^block_3;
60
61 ^block_3:
62 %15 : int = var.load %5;
63 %16 : int = constant @"1";
64 %17 : int = add %15 %16;
65 var.store %5 %17;
66 branch ^block_0;
67
68 ^block_2:
69 %18 : int = var.load %3;
70 return %18;
71 };
72 """, ssa = false)
73 static int testFor(int[] a) {
74 int sum = 0;
75 for (int i = 0; i < a.length; i++) {
76 sum += a[i];
77 }
78 return sum;
79 }
80
81 @CodeReflection
82 @LoweredModel(value = """
83 func @"testForSSA" (%0 : int[])int -> {
84 %1 : int = constant @"0";
85 %2 : int = constant @"0";
86 branch ^block_0(%1, %2);
87
88 ^block_0(%3 : int, %4 : int):
89 %5 : int = array.length %0;
90 %6 : boolean = lt %4 %5;
91 cbranch %6 ^block_1 ^block_2;
92
93 ^block_1:
94 %7 : int = array.load %0 %4;
95 %8 : int = add %3 %7;
96 branch ^block_3;
97
98 ^block_3:
99 %9 : int = constant @"1";
100 %10 : int = add %4 %9;
101 branch ^block_0(%8, %10);
102
103 ^block_2:
104 return %3;
105 };
106 """, ssa = true)
107 static int testForSSA(int[] a) {
108 int sum = 0;
109 for (int i = 0; i < a.length; i++) {
110 sum += a[i];
111 }
112 return sum;
113 }
114 }