1 /*
2 * Copyright (c) 2015, 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 package org.graalvm.compiler.nodes.graphbuilderconf;
24
25 import org.graalvm.compiler.bytecode.BytecodeProvider;
26 import org.graalvm.compiler.nodes.Invoke;
27 import org.graalvm.compiler.nodes.ValueNode;
28
29 import jdk.vm.ci.meta.ResolvedJavaMethod;
30
31 /**
32 * Plugin for specifying what is inlined during graph parsing. This plugin is also notified
33 * {@link #notifyBeforeInline before} and {@link #notifyAfterInline} the inlining, as well as of
34 * {@link #notifyNotInlined non-inlined} invocations (i.e., those for which an {@link Invoke} node
35 * is created).
36 */
37 public interface InlineInvokePlugin extends GraphBuilderPlugin {
38
39 /**
40 * Result of a {@link #shouldInlineInvoke inlining decision}.
41 */
42 final class InlineInfo {
43
44 /**
45 * Denotes a call site that must not be inlined and should be implemented by a node that
46 * does not speculate on the call not raising an exception.
47 */
48 public static final InlineInfo DO_NOT_INLINE_WITH_EXCEPTION = new InlineInfo(null, null);
49
50 /**
51 * Denotes a call site must not be inlined and can be implemented by a node that speculates
52 * the call will not throw an exception.
53 */
54 public static final InlineInfo DO_NOT_INLINE_NO_EXCEPTION = new InlineInfo(null, null);
55
56 private final ResolvedJavaMethod methodToInline;
57 private final BytecodeProvider intrinsicBytecodeProvider;
58
59 public static InlineInfo createStandardInlineInfo(ResolvedJavaMethod methodToInline) {
60 return new InlineInfo(methodToInline, null);
61 }
62
63 public static InlineInfo createIntrinsicInlineInfo(ResolvedJavaMethod methodToInline, BytecodeProvider intrinsicBytecodeProvider) {
64 return new InlineInfo(methodToInline, intrinsicBytecodeProvider);
65 }
66
67 private InlineInfo(ResolvedJavaMethod methodToInline, BytecodeProvider intrinsicBytecodeProvider) {
68 this.methodToInline = methodToInline;
69 this.intrinsicBytecodeProvider = intrinsicBytecodeProvider;
70 }
71
72 /**
73 * Returns the method to be inlined, or {@code null} if the call site must not be inlined.
74 */
75 public ResolvedJavaMethod getMethodToInline() {
76 return methodToInline;
77 }
78
79 /**
80 * Gets the provider of bytecode to be parsed for {@link #getMethodToInline()} if is is an
81 * intrinsic for the original method (i.e., the {@code method} passed to
82 * {@link InlineInvokePlugin#shouldInlineInvoke}). A {@code null} return value indicates
83 * that this is not an intrinsic inlining.
84 */
85 public BytecodeProvider getIntrinsicBytecodeProvider() {
86 return intrinsicBytecodeProvider;
87 }
88 }
89
90 /**
91 * Determines whether a call to a given method is to be inlined. The return value is a
92 * tri-state:
93 * <p>
94 * Non-null return value with a non-null {@link InlineInfo#getMethodToInline method}: That
95 * {@link InlineInfo#getMethodToInline method} is inlined. Note that it can be a different
96 * method than the one specified here as the parameter, which allows method substitutions.
97 * <p>
98 * Non-null return value with a null {@link InlineInfo#getMethodToInline method}, e.g.,
99 * {@link InlineInfo#DO_NOT_INLINE_WITH_EXCEPTION}: The method is not inlined, and other plugins
100 * with a lower priority cannot overwrite this decision.
101 * <p>
102 * Null return value: This plugin made no decision, other plugins with a lower priority are
103 * asked.
104 *
105 * @param b the context
106 * @param method the target method of an invoke
107 * @param args the arguments to the invoke
108 */
109 default InlineInfo shouldInlineInvoke(GraphBuilderContext b, ResolvedJavaMethod method, ValueNode[] args) {
110 return null;
111 }
112
113 /**
114 * Notification that a method is about to be inlined.
115 *
116 * @param methodToInline the inlined method
117 */
118 default void notifyBeforeInline(ResolvedJavaMethod methodToInline) {
119 }
120
121 /**
122 * Notification that a method was inlined.
123 *
124 * @param methodToInline the inlined method
125 */
126 default void notifyAfterInline(ResolvedJavaMethod methodToInline) {
127 }
128
129 /**
130 * Notifies this plugin of the {@link Invoke} node created for a method that was not inlined per
131 * {@link #shouldInlineInvoke}.
132 *
133 * @param b the context
134 * @param method the method that was not inlined
135 * @param invoke the invoke node created for the call to {@code method}
136 */
137 default void notifyNotInlined(GraphBuilderContext b, ResolvedJavaMethod method, Invoke invoke) {
138 }
139 }