--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot.aarch64/src/org/graalvm/compiler/hotspot/aarch64/AArch64HotSpotMoveFactory.java 2016-12-07 13:49:26.801328035 -0800 @@ -0,0 +1,76 @@ +/* + * 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); + } + } +}