AMD64HotSpotMoveFactory.java revision 13304:5e9c41536bd2 
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 */
23package org.graalvm.compiler.hotspot.amd64;
24
25import org.graalvm.compiler.core.amd64.AMD64MoveFactory;
26import org.graalvm.compiler.lir.LIRInstruction;
27import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;
28
29import jdk.vm.ci.hotspot.HotSpotCompressedNullConstant;
30import jdk.vm.ci.hotspot.HotSpotConstant;
31import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;
32import jdk.vm.ci.hotspot.HotSpotObjectConstant;
33import jdk.vm.ci.meta.AllocatableValue;
34import jdk.vm.ci.meta.Constant;
35import jdk.vm.ci.meta.JavaConstant;
36
37public class AMD64HotSpotMoveFactory extends AMD64MoveFactory {
38
39    public AMD64HotSpotMoveFactory(BackupSlotProvider backupSlotProvider) {
40        super(backupSlotProvider);
41    }
42
43    @Override
44    public boolean canInlineConstant(Constant c) {
45        if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) {
46            return true;
47        } else if (c instanceof HotSpotObjectConstant) {
48            return ((HotSpotObjectConstant) c).isCompressed();
49        } else if (c instanceof HotSpotMetaspaceConstant) {
50            return ((HotSpotMetaspaceConstant) c).isCompressed();
51        } else {
52            return super.canInlineConstant(c);
53        }
54    }
55
56    @Override
57    public boolean allowConstantToStackMove(Constant value) {
58        if (value instanceof HotSpotConstant) {
59            return ((HotSpotConstant) value).isCompressed();
60        }
61        return super.allowConstantToStackMove(value);
62    }
63
64    @Override
65    public AMD64LIRInstruction createLoad(AllocatableValue dst, Constant src) {
66        if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(src)) {
67            return super.createLoad(dst, JavaConstant.INT_0);
68        } else if (src instanceof HotSpotObjectConstant) {
69            return new AMD64HotSpotMove.HotSpotLoadObjectConstantOp(dst, (HotSpotObjectConstant) src);
70        } else if (src instanceof HotSpotMetaspaceConstant) {
71            return new AMD64HotSpotMove.HotSpotLoadMetaspaceConstantOp(dst, (HotSpotMetaspaceConstant) src);
72        } else {
73            return super.createLoad(dst, src);
74        }
75    }
76
77    @Override
78    public LIRInstruction createStackLoad(AllocatableValue dst, Constant src) {
79        if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(src)) {
80            return super.createStackLoad(dst, JavaConstant.INT_0);
81        } else if (src instanceof HotSpotObjectConstant) {
82            assert ((HotSpotConstant) src).isCompressed();
83            return new AMD64HotSpotMove.HotSpotLoadObjectConstantOp(dst, (HotSpotObjectConstant) src);
84        } else if (src instanceof HotSpotMetaspaceConstant) {
85            assert ((HotSpotConstant) src).isCompressed();
86            return new AMD64HotSpotMove.HotSpotLoadMetaspaceConstantOp(dst, (HotSpotMetaspaceConstant) src);
87        } else {
88            return super.createStackLoad(dst, src);
89        }
90    }
91}
92