| /* |
| * Copyright (c) 2014, 2015, 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.lir.dfa; |
| |
| import static jdk.vm.ci.code.ValueUtil.asRegister; |
| import static jdk.vm.ci.code.ValueUtil.isRegister; |
| import static jdk.vm.ci.code.ValueUtil.isStackSlot; |
| |
| import org.graalvm.compiler.core.common.LIRKind; |
| import org.graalvm.compiler.lir.LIR; |
| import org.graalvm.compiler.lir.LIRFrameState; |
| import org.graalvm.compiler.lir.LIRInstruction; |
| import org.graalvm.compiler.lir.framemap.FrameMap; |
| import org.graalvm.compiler.lir.framemap.ReferenceMapBuilder; |
| import org.graalvm.compiler.lir.gen.LIRGenerationResult; |
| import org.graalvm.compiler.lir.phases.AllocationPhase; |
| |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.code.RegisterAttributes; |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.meta.Value; |
| |
| /** |
| * Mark all live references for a frame state. The frame state use this information to build the OOP |
| * maps. |
| */ |
| public final class LocationMarkerPhase extends AllocationPhase { |
| |
| @Override |
| protected void run(TargetDescription target, LIRGenerationResult lirGenRes, AllocationContext context) { |
| new Marker(lirGenRes.getLIR(), lirGenRes.getFrameMap()).build(); |
| } |
| |
| static final class Marker extends LocationMarker<RegStackValueSet> { |
| |
| private final RegisterAttributes[] registerAttributes; |
| |
| private Marker(LIR lir, FrameMap frameMap) { |
| super(lir, frameMap); |
| this.registerAttributes = frameMap.getRegisterConfig().getAttributesMap(); |
| } |
| |
| @Override |
| protected RegStackValueSet newLiveValueSet() { |
| return new RegStackValueSet(frameMap); |
| } |
| |
| @Override |
| protected boolean shouldProcessValue(Value operand) { |
| if (isRegister(operand)) { |
| Register reg = asRegister(operand); |
| if (!reg.mayContainReference() || !attributes(reg).isAllocatable()) { |
| // register that's not allocatable or not part of the reference map |
| return false; |
| } |
| } else if (!isStackSlot(operand)) { |
| // neither register nor stack slot |
| return false; |
| } |
| |
| return !operand.getValueKind().equals(LIRKind.Illegal); |
| } |
| |
| /** |
| * This method does the actual marking. |
| */ |
| @Override |
| protected void processState(LIRInstruction op, LIRFrameState info, RegStackValueSet values) { |
| if (!info.hasDebugInfo()) { |
| info.initDebugInfo(frameMap, !op.destroysCallerSavedRegisters() || !frameMap.getRegisterConfig().areAllAllocatableRegistersCallerSaved()); |
| } |
| |
| ReferenceMapBuilder refMap = frameMap.newReferenceMapBuilder(); |
| frameMap.addLiveValues(refMap); |
| values.addLiveValues(refMap); |
| |
| info.debugInfo().setReferenceMap(refMap.finish(info)); |
| } |
| |
| /** |
| * Gets an object describing the attributes of a given register according to this register |
| * configuration. |
| */ |
| private RegisterAttributes attributes(Register reg) { |
| return registerAttributes[reg.number]; |
| } |
| |
| } |
| } |