1 /*
 2  * Copyright (c) 2025, 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.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 package jdk.incubator.code.internal;
26 
27 import java.util.HashMap;
28 import java.util.Map;
29 import jdk.incubator.code.Block;
30 import jdk.incubator.code.CodeContext;
31 import jdk.incubator.code.CodeElement;
32 
33 
34 public record BranchTarget(Block.Builder breakBlock, Block.Builder continueBlock) {
35 
36     static final String BRANCH_TARGET_MAP_PROPERTY_KEY = "BRANCH_TARGET_MAP";
37 
38     public static BranchTarget getBranchTarget(CodeContext cc, CodeElement<?, ?> codeElement) {
39         @SuppressWarnings("unchecked")
40         Map<jdk.incubator.code.CodeElement<?, ?>, BranchTarget> m = (Map<jdk.incubator.code.CodeElement<?, ?>, BranchTarget>) cc.getProperty(BRANCH_TARGET_MAP_PROPERTY_KEY);
41         if (m != null) {
42             return m.get(codeElement);
43         }
44         return null;
45     }
46 
47     public static void setBranchTarget(CodeContext cc, CodeElement<?, ?> codeElement, Block.Builder breakBlock, Block.Builder continueBlock) {
48         @SuppressWarnings("unchecked")
49         Map<jdk.incubator.code.CodeElement<?, ?>, BranchTarget> x = (Map<jdk.incubator.code.CodeElement<?, ?>, BranchTarget>) cc.computePropertyIfAbsent(
50                 BRANCH_TARGET_MAP_PROPERTY_KEY, k -> new HashMap<>());
51         x.put(codeElement, new BranchTarget(breakBlock, continueBlock));
52     }
53 }