Mercurial > hg > graal-compiler
view graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/Signature.java @ 21591:6c5327245831
LinearScan: fix intervals context.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Fri, 29 May 2015 10:59:03 +0200 |
parents | f41409c6ff26 |
children |
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/* * Copyright (c) 2009, 2012, 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.jvmci.meta; /** * Represents a method signature provided by the runtime. * * @see <a href="http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3">Method * Descriptors</a> */ public interface Signature { /** * Returns the number of parameters in this signature, adding 1 for a receiver if requested. * * @param receiver true if 1 is to be added to the result for a receiver * @return the number of parameters; + 1 iff {@code receiver == true} */ int getParameterCount(boolean receiver); /** * Gets the parameter type at the specified position. * * @param index the index into the parameters, with {@code 0} indicating the first parameter * @param accessingClass the context of the type lookup. If non-null, its class loader is used * for resolving the type. If {@code null}, then the type returned is either * unresolved or a resolved type whose resolution is context free (e.g., a primitive * type or a type in a java.* package). * @return the {@code index}'th parameter type * @throws LinkageError if {@code accessingClass != null} and resolution fails * */ JavaType getParameterType(int index, ResolvedJavaType accessingClass); /** * Gets the parameter kind at the specified position. This is the same as calling * {@link #getParameterType}. {@link JavaType#getKind getKind}. * * @param index the index into the parameters, with {@code 0} indicating the first parameter * @return the kind of the parameter at the specified position */ default Kind getParameterKind(int index) { return getParameterType(index, null).getKind(); } /** * Gets the return type of this signature. * * @param accessingClass the context of the type lookup. If non-null, its class loader is used * for resolving the type. If {@code null}, then the type returned is either * unresolved or a resolved type whose resolution is context free (e.g., a primitive * type or a type in a java.* package). * @return the return type * @throws LinkageError if {@code accessingClass != null} and resolution fails */ JavaType getReturnType(ResolvedJavaType accessingClass); /** * Gets the return kind of this signature. This is the same as calling {@link #getReturnType}. * {@link JavaType#getKind getKind}. */ default Kind getReturnKind() { return getReturnType(null).getKind(); } /** * Gets the <a * href="http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3">method * descriptor</a> corresponding to this signature. For example: * * <pre> * (ILjava/lang/String;D)V * </pre> * * @return the signature as a string */ default String toMethodDescriptor() { StringBuilder sb = new StringBuilder("("); for (int i = 0; i < getParameterCount(false); ++i) { sb.append(getParameterType(i, null).getName()); } sb.append(')').append(getReturnType(null).getName()); return sb.toString(); } default JavaType[] toParameterTypes(JavaType receiverType) { int args = getParameterCount(false); JavaType[] result; int i = 0; if (receiverType != null) { result = new JavaType[args + 1]; result[0] = receiverType; i = 1; } else { result = new JavaType[args]; } for (int j = 0; j < args; j++) { result[i + j] = getParameterType(j, null); } return result; } default Kind[] toParameterKinds(boolean receiver) { int args = getParameterCount(false); Kind[] result; int i = 0; if (receiver) { result = new Kind[args + 1]; result[0] = Kind.Object; i = 1; } else { result = new Kind[args]; } for (int j = 0; j < args; j++) { result[i + j] = getParameterKind(j); } return result; } }