Mercurial > hg > truffle
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/Snippet.java @ 12362:f53dc8bbb88c
refactored isReexecutable(), getKilledLocations() and canDeoptimize() out of MetaAccessProvider into ForeignCallsProvider (GRAAL-511)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Sat, 12 Oct 2013 00:31:37 +0200 |
parents | a80d09922fc1 |
children | 820c6d353358 |
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/* * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.replacements; import java.lang.annotation.*; import java.lang.reflect.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.Node.NodeIntrinsic; import com.oracle.graal.replacements.nodes.*; import com.oracle.graal.word.*; /** * A snippet is a Graal graph expressed as a Java source method. Snippets are used for lowering * nodes that have runtime dependent semantics (e.g. the {@code CHECKCAST} bytecode). */ @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.METHOD) public @interface Snippet { /** * Specifies the class defining the inlining policy for this snippet. A * {@linkplain DefaultSnippetInliningPolicy default} policy is used if none is supplied. */ Class<? extends SnippetInliningPolicy> inlining() default SnippetInliningPolicy.class; /** * Specifies whether all FrameStates within this snippet should always be removed. If this is * false, FrameStates are only removed if there are no side-effecting instructions in the * snippet. */ boolean removeAllFrameStates() default false; /** * Guides inlining decisions used when installing a snippet. */ public interface SnippetInliningPolicy { /** * Determines if {@code method} should be inlined into {@code caller}. */ boolean shouldInline(ResolvedJavaMethod method, ResolvedJavaMethod caller); /** * Determines if {@code method} should be inlined using its replacement graph. * * @return true if the replacement graph should be used, false for normal inlining. */ boolean shouldUseReplacement(ResolvedJavaMethod callee, ResolvedJavaMethod methodToParse); } /** * The default inlining policy which inlines everything except for methods in any of the * following categories. * <ul> * <li>{@linkplain Fold foldable} methods</li> * <li>{@linkplain NodeIntrinsic node intrinsics}</li> * <li>native methods</li> * <li>constructors of {@link Throwable} classes</li> * </ul> */ public static class DefaultSnippetInliningPolicy implements SnippetInliningPolicy { private final MetaAccessProvider metaAccess; public DefaultSnippetInliningPolicy(MetaAccessProvider metaAccess) { this.metaAccess = metaAccess; } @Override public boolean shouldInline(ResolvedJavaMethod method, ResolvedJavaMethod caller) { if (Modifier.isNative(method.getModifiers())) { return false; } if (method.getAnnotation(Fold.class) != null) { return false; } if (method.getAnnotation(NodeIntrinsic.class) != null) { return false; } if (metaAccess.lookupJavaType(Throwable.class).isAssignableFrom(method.getDeclaringClass())) { if (method.isConstructor()) { return false; } } if (method.getAnnotation(Word.Operation.class) != null) { return false; } return true; } @Override public boolean shouldUseReplacement(ResolvedJavaMethod callee, ResolvedJavaMethod methodToParse) { return true; } } /** * Annotates a method replaced by a compile-time constant. A (resolved) call to the annotated * method is replaced with a constant obtained by calling the annotated method via reflection. * * All arguments to such a method (including the receiver if applicable) must be compile-time * constants. */ @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.METHOD) public static @interface Fold { } /** * Denotes a snippet parameter representing 0 or more arguments that will be bound during * snippet template {@linkplain SnippetTemplate#instantiate instantiation}. During snippet * template creation, its value must be an array whose length specifies the number of arguments * (the contents of the array are ignored) bound to the parameter during * {@linkplain SnippetTemplate#instantiate instantiation}. * * Such a parameter must be used in a counted loop in the snippet preceded by a call to * {@link ExplodeLoopNode#explodeLoop()}. The counted looped must be a standard iteration over * all the loop's elements (i.e. {@code for (T e : arr) ... }). */ @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.PARAMETER) public @interface VarargsParameter { } /** * Denotes a snippet parameter that will bound to a constant value during snippet template * {@linkplain SnippetTemplate#instantiate instantiation}. */ @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.PARAMETER) public @interface ConstantParameter { } }