1 /*
2  * Copyright (c) 1994, 2003, 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 sun.tools.tree;
27 
28 import sun.tools.java.*;
29 import sun.tools.asm.Label;
30 import sun.tools.asm.Assembler;
31 import java.io.PrintStream;
32 
33 /**
34  * WARNING: The contents of this source file are not part of any
35  * supported API.  Code that depends on them does so at its own risk:
36  * they are subject to change or removal without notice.
37  */
38 public
39 class InlineMethodExpression extends Expression {
40     MemberDefinition field;
41     Statement body;
42 
43     /**
44      * Constructor
45      */
InlineMethodExpression(long where, Type type, MemberDefinition field, Statement body)46     InlineMethodExpression(long where, Type type, MemberDefinition field, Statement body) {
47         super(INLINEMETHOD, where, type);
48         this.field = field;
49         this.body = body;
50     }
51     /**
52      * Inline
53      */
inline(Environment env, Context ctx)54     public Expression inline(Environment env, Context ctx) {
55         body = body.inline(env, new Context(ctx, this));
56         if (body == null) {
57             return null;
58         } else if (body.op == INLINERETURN) {
59             Expression expr = ((InlineReturnStatement)body).expr;
60             if (expr != null && type.isType(TC_VOID)) {
61                 throw new CompilerError("value on inline-void return");
62             }
63             return expr;
64         } else {
65             return this;
66         }
67     }
inlineValue(Environment env, Context ctx)68     public Expression inlineValue(Environment env, Context ctx) {
69         // When this node was constructed, "copyInline" walked the body
70         // with a "valNeeded" flag which made all returns either void
71         // or value-bearing.  The type of this node reflects that
72         // earlier choice.  The present inline/inlineValue distinction
73         // is ignored.
74         return inline(env, ctx);
75     }
76 
77     /**
78      * Create a copy of the expression for method inlining
79      */
copyInline(Context ctx)80     public Expression copyInline(Context ctx) {
81         InlineMethodExpression e = (InlineMethodExpression)clone();
82         if (body != null) {
83             e.body = body.copyInline(ctx, true);
84         }
85         return e;
86     }
87 
88     /**
89      * Code
90      */
code(Environment env, Context ctx, Assembler asm)91     public void code(Environment env, Context ctx, Assembler asm) {
92         // pop the result if there is any (usually, type is already void)
93         super.code(env, ctx, asm);
94     }
codeValue(Environment env, Context ctx, Assembler asm)95     public void codeValue(Environment env, Context ctx, Assembler asm) {
96         CodeContext newctx = new CodeContext(ctx, this);
97         body.code(env, newctx, asm);
98         asm.add(newctx.breakLabel);
99     }
100 
101     /**
102      * Print
103      */
print(PrintStream out)104     public void print(PrintStream out) {
105         out.print("(" + opNames[op] + "\n");
106         body.print(out, 1);
107         out.print(")");
108     }
109 }
110