Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/RegisterConfig.java @ 23320:d9ae6a4319be
add support for MX_ALT_OUTPUT_ROOT
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 11 Mar 2016 16:53:36 +0100 |
parents | d63506bb5237 |
children | 1d4ce2d19e52 |
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/* * Copyright (c) 2009, 2015, 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 jdk.vm.ci.code; import jdk.vm.ci.code.CallingConvention.Type; import jdk.vm.ci.meta.JavaKind; import jdk.vm.ci.meta.JavaType; import jdk.vm.ci.meta.PlatformKind; /** * A register configuration binds roles and {@linkplain RegisterAttributes attributes} to physical * registers. */ public interface RegisterConfig { /** * Gets the register to be used for returning a value of a given kind. */ Register getReturnRegister(JavaKind kind); /** * Gets the maximum allowed size of the frame. */ default int getMaximumFrameSize() { return Integer.MAX_VALUE; } /** * Gets the register to which {@link Register#Frame} and {@link Register#CallerFrame} are bound. */ Register getFrameRegister(); /** * Gets the calling convention describing how arguments are passed. * * @param type the type of calling convention being requested * @param returnType the return type (can be null for methods returning {@code void}) * @param parameterTypes the types of the arguments of the call * @param target the target platform */ CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, TargetDescription target); /** * Gets the ordered set of registers that are can be used to pass parameters according to a * given calling convention. * * @param type the type of calling convention * @param kind specifies what kind of registers is being requested * @return the ordered set of registers that may be used to pass parameters in a call conforming * to {@code type} */ Register[] getCallingConventionRegisters(Type type, JavaKind kind); /** * Gets the set of all registers that might be used by the register allocator. * * To get the set of registers the register allocator is allowed to use see * {@link RegisterAllocationConfig#getAllocatableRegisters()} */ @SuppressWarnings("javadoc") Register[] getAllocatableRegisters(); /** * Filters a set of registers and returns only those that can be used by the register allocator * for a value of a particular kind. */ Register[] filterAllocatableRegisters(PlatformKind kind, Register[] registers); /** * Gets the registers whose values must be preserved by a method across any call it makes. */ Register[] getCallerSaveRegisters(); /** * Gets the registers whose values must be preserved by the callee. */ Register[] getCalleeSaveRegisters(); /** * Gets a map from register {@linkplain Register#number numbers} to register * {@linkplain RegisterAttributes attributes} for this register configuration. * * @return an array where an element at index i holds the attributes of the register whose * number is i */ RegisterAttributes[] getAttributesMap(); /** * Gets the register corresponding to a runtime-defined role. * * @param id the identifier of a runtime-defined register role * @return the register playing the role specified by {@code id} */ Register getRegisterForRole(int id); /** * Determines if all {@link #getAllocatableRegisters() allocatable} registers are * {@link #getCallerSaveRegisters() caller saved}. */ boolean areAllAllocatableRegistersCallerSaved(); }