| /* |
| * Copyright (c) 2015, 2016, 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 org.graalvm.compiler.hotspot.aarch64; |
| |
| import static jdk.vm.ci.hotspot.HotSpotCompressedNullConstant.COMPRESSED_NULL; |
| import static jdk.vm.ci.meta.JavaConstant.INT_0; |
| import static jdk.vm.ci.meta.JavaConstant.LONG_0; |
| |
| import org.graalvm.compiler.core.aarch64.AArch64MoveFactory; |
| import org.graalvm.compiler.lir.LIRInstruction; |
| |
| import jdk.vm.ci.hotspot.HotSpotCompressedNullConstant; |
| import jdk.vm.ci.hotspot.HotSpotConstant; |
| import jdk.vm.ci.hotspot.HotSpotObjectConstant; |
| import jdk.vm.ci.meta.AllocatableValue; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.JavaConstant; |
| |
| public class AArch64HotSpotMoveFactory extends AArch64MoveFactory { |
| |
| @Override |
| public boolean canInlineConstant(JavaConstant c) { |
| if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) { |
| return true; |
| } else if (c instanceof HotSpotObjectConstant) { |
| return false; |
| } else { |
| return super.canInlineConstant(c); |
| } |
| } |
| |
| @Override |
| public LIRInstruction createLoad(AllocatableValue dst, Constant src) { |
| Constant usedSource; |
| if (COMPRESSED_NULL.equals(src)) { |
| usedSource = INT_0; |
| } else if (src instanceof HotSpotObjectConstant && ((HotSpotObjectConstant) src).isNull()) { |
| usedSource = LONG_0; |
| } else { |
| usedSource = src; |
| } |
| if (usedSource instanceof HotSpotConstant) { |
| HotSpotConstant constant = (HotSpotConstant) usedSource; |
| if (constant.isCompressed()) { |
| return new AArch64HotSpotMove.LoadHotSpotObjectConstantInline(constant, dst); |
| } else { |
| // XXX Do we need the constant table? |
| // return new SPARCHotSpotMove.LoadHotSpotObjectConstantFromTable(constant, dst, |
| // constantTableBaseProvider.getConstantTableBase()); |
| return new AArch64HotSpotMove.LoadHotSpotObjectConstantInline(constant, dst); |
| } |
| } else { |
| return super.createLoad(dst, usedSource); |
| } |
| } |
| } |