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23217
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1 /*
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2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.aarch64;
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24
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25 import static jdk.vm.ci.hotspot.HotSpotCompressedNullConstant.COMPRESSED_NULL;
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26 import static jdk.vm.ci.meta.JavaConstant.INT_0;
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27 import static jdk.vm.ci.meta.JavaConstant.LONG_0;
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28
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29 import com.oracle.graal.compiler.aarch64.AArch64LIRGenerator.ConstantTableBaseProvider;
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30 import com.oracle.graal.compiler.aarch64.AArch64MoveFactory;
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31 import com.oracle.graal.lir.LIRInstruction;
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32
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33 import jdk.vm.ci.code.CodeCacheProvider;
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34 import jdk.vm.ci.common.JVMCIError;
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35 import jdk.vm.ci.hotspot.HotSpotCompressedNullConstant;
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36 import jdk.vm.ci.hotspot.HotSpotConstant;
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37 import jdk.vm.ci.hotspot.HotSpotObjectConstant;
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38 import jdk.vm.ci.meta.AllocatableValue;
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39 import jdk.vm.ci.meta.Constant;
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40 import jdk.vm.ci.meta.JavaConstant;
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41
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42 public class AArch64HotSpotMoveFactory extends AArch64MoveFactory {
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43
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44 public AArch64HotSpotMoveFactory(CodeCacheProvider codeCache, ConstantTableBaseProvider constantTableBaseProvider) {
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45 super(codeCache, constantTableBaseProvider);
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46 }
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47
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48 @Override
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49 public boolean canInlineConstant(JavaConstant c) {
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50 if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) {
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51 return true;
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52 } else if (c instanceof HotSpotObjectConstant) {
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53 return false;
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54 } else {
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55 return super.canInlineConstant(c);
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56 }
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57 }
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58
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59 @Override
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60 public LIRInstruction createLoad(AllocatableValue dst, Constant src) {
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61 Constant usedSource;
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62 if (COMPRESSED_NULL.equals(src)) {
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63 usedSource = INT_0;
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64 } else if (src instanceof HotSpotObjectConstant && ((HotSpotObjectConstant) src).isNull()) {
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65 usedSource = LONG_0;
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66 } else {
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67 usedSource = src;
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68 }
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69 if (usedSource instanceof HotSpotConstant) {
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70 HotSpotConstant constant = (HotSpotConstant) usedSource;
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71 if (constant.isCompressed()) {
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72 // return new SPARCHotSpotMove.LoadHotSpotObjectConstantInline(constant, dst);
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73 throw JVMCIError.unimplemented();
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74 } else {
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75 // return new SPARCHotSpotMove.LoadHotSpotObjectConstantFromTable(constant, dst,
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76 // constantTableBaseProvider.getConstantTableBase());
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77 throw JVMCIError.unimplemented();
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78 }
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79 } else {
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80 return super.createLoad(dst, usedSource);
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81 }
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82 }
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83 }
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