1 /* 2 * Copyright (c) 2015, 2016, 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.hotspot.amd64; 24 25 import org.graalvm.compiler.core.amd64.AMD64MoveFactory; 26 import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction; 27 28 import jdk.vm.ci.hotspot.HotSpotCompressedNullConstant; 29 import jdk.vm.ci.hotspot.HotSpotConstant; 30 import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant; 31 import jdk.vm.ci.hotspot.HotSpotObjectConstant; 32 import jdk.vm.ci.meta.AllocatableValue; 33 import jdk.vm.ci.meta.Constant; 34 import jdk.vm.ci.meta.JavaConstant; 35 36 public class AMD64HotSpotMoveFactory extends AMD64MoveFactory { 37 38 public AMD64HotSpotMoveFactory(BackupSlotProvider backupSlotProvider) { 39 super(backupSlotProvider); 40 } 41 42 @Override 43 public boolean canInlineConstant(JavaConstant c) { 44 if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) { 45 return true; 46 } else if (c instanceof HotSpotObjectConstant) { 47 return ((HotSpotObjectConstant) c).isCompressed(); 48 } else { 49 return super.canInlineConstant(c); 50 } 51 } 52 53 @Override 54 public boolean allowConstantToStackMove(Constant value) { 55 if (value instanceof HotSpotConstant) { 56 return ((HotSpotConstant) value).isCompressed(); 57 } 58 return true; 59 } 60 61 @Override 62 public AMD64LIRInstruction createLoad(AllocatableValue dst, Constant src) { 63 if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(src)) { 64 return super.createLoad(dst, JavaConstant.INT_0); 65 } else if (src instanceof HotSpotObjectConstant) { 66 return new AMD64HotSpotMove.HotSpotLoadObjectConstantOp(dst, (HotSpotObjectConstant) src); 67 } else if (src instanceof HotSpotMetaspaceConstant) { 68 return new AMD64HotSpotMove.HotSpotLoadMetaspaceConstantOp(dst, (HotSpotMetaspaceConstant) src); 69 } else { 70 return super.createLoad(dst, src); 71 } 72 } 73 }