1 /*
 2  * Copyright (c) 2025, 2026, 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 
26 package jdk.incubator.code.internal;
27 
28 import java.util.HashMap;
29 import java.util.Map;
30 
31 import jdk.incubator.code.Block;
32 import jdk.incubator.code.CodeContext;
33 import jdk.incubator.code.CodeElement;
34 
35 public record BranchTarget(Block.Builder breakBlock, Block.Builder continueBlock) {
36 
37     static final String BRANCH_TARGET_MAP_PROPERTY_KEY = "BRANCH_TARGET_MAP";
38 
39     public static BranchTarget getBranchTarget(CodeContext cc, CodeElement<?, ?> codeElement) {
40         @SuppressWarnings("unchecked")
41         var branchMap = (Map<CodeElement<?, ?>, BranchTarget>) cc.getProperty(BRANCH_TARGET_MAP_PROPERTY_KEY);
42         return branchMap != null
43                 ? branchMap.get(codeElement)
44                 : null;
45     }
46 
47     public static void setBranchTarget(CodeContext cc, CodeElement<?, ?> codeElement,
48                                        Block.Builder breakBlock, Block.Builder continueBlock) {
49         @SuppressWarnings("unchecked")
50         var branchMap = (Map<CodeElement<?, ?>, BranchTarget>) cc.computePropertyIfAbsent(
51                 BRANCH_TARGET_MAP_PROPERTY_KEY, k -> new HashMap<>());
52         branchMap.put(codeElement, new BranchTarget(breakBlock, continueBlock));
53     }
54 }