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.sparc; 24 25 import static jdk.vm.ci.hotspot.HotSpotCompressedNullConstant.COMPRESSED_NULL; 26 import static jdk.vm.ci.meta.JavaConstant.INT_0; 27 import static jdk.vm.ci.meta.JavaConstant.LONG_0; 28 29 import org.graalvm.compiler.core.sparc.SPARCLIRGenerator.ConstantTableBaseProvider; 30 import org.graalvm.compiler.core.sparc.SPARCMoveFactory; 31 import org.graalvm.compiler.lir.LIRInstruction; 32 33 import jdk.vm.ci.hotspot.HotSpotCompressedNullConstant; 34 import jdk.vm.ci.hotspot.HotSpotConstant; 35 import jdk.vm.ci.hotspot.HotSpotObjectConstant; 36 import jdk.vm.ci.meta.AllocatableValue; 37 import jdk.vm.ci.meta.Constant; 38 import jdk.vm.ci.meta.JavaConstant; 39 40 public class SPARCHotSpotMoveFactory extends SPARCMoveFactory { 41 42 public SPARCHotSpotMoveFactory(ConstantTableBaseProvider constantTableBaseProvider) { 43 super(constantTableBaseProvider); 44 } 45 46 @Override 47 public boolean canInlineConstant(JavaConstant c) { 48 if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) { 49 return true; 50 } else if (c instanceof HotSpotObjectConstant) { 51 return false; 52 } else { 53 return super.canInlineConstant(c); 54 } 55 } 56 57 @Override 58 public LIRInstruction createLoad(AllocatableValue dst, Constant src) { 59 Constant usedSource; 60 if (COMPRESSED_NULL.equals(src)) { 61 usedSource = INT_0; 62 } else if (src instanceof HotSpotObjectConstant && ((HotSpotObjectConstant) src).isNull()) { 63 usedSource = LONG_0; 64 } else { 65 usedSource = src; 66 } 67 if (usedSource instanceof HotSpotConstant) { 68 HotSpotConstant constant = (HotSpotConstant) usedSource; 69 if (constant.isCompressed()) { 70 return new SPARCHotSpotMove.LoadHotSpotObjectConstantInline(constant, dst); 71 } else { 72 return new SPARCHotSpotMove.LoadHotSpotObjectConstantFromTable(constant, dst, constantTableBaseProvider.getConstantTableBase()); 73 } 74 } else { 75 return super.createLoad(dst, usedSource); 76 } 77 } 78 }