| /* |
| * Copyright (c) 2015, 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.alloc.trace; |
| |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK; |
| |
| import java.util.EnumSet; |
| |
| import org.graalvm.compiler.lir.CompositeValue; |
| import org.graalvm.compiler.lir.InstructionValueConsumer; |
| import org.graalvm.compiler.lir.InstructionValueProcedure; |
| import org.graalvm.compiler.lir.LIRInstruction; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandFlag; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandMode; |
| |
| import jdk.vm.ci.code.RegisterValue; |
| import jdk.vm.ci.meta.AllocatableValue; |
| |
| /** |
| * Represents a {@link #register} which has a shadow copy on the {@link #stackslot stack}. |
| */ |
| public final class ShadowedRegisterValue extends CompositeValue { |
| private static final EnumSet<OperandFlag> registerFlags = EnumSet.of(REG); |
| private static final EnumSet<OperandFlag> stackslotFlags = EnumSet.of(STACK); |
| |
| @Component({REG}) protected RegisterValue register; |
| @Component({STACK}) protected AllocatableValue stackslot; |
| |
| public ShadowedRegisterValue(RegisterValue register, AllocatableValue stackslot) { |
| super(register.getValueKind()); |
| assert (register.getValueKind().equals(stackslot.getValueKind())); |
| this.register = register; |
| this.stackslot = stackslot; |
| } |
| |
| public RegisterValue getRegister() { |
| return register; |
| } |
| |
| public AllocatableValue getStackSlot() { |
| return stackslot; |
| } |
| |
| @Override |
| public CompositeValue forEachComponent(LIRInstruction inst, OperandMode mode, InstructionValueProcedure proc) { |
| RegisterValue newRegister = (RegisterValue) proc.doValue(inst, register, mode, registerFlags); |
| AllocatableValue newStackSlot = (AllocatableValue) proc.doValue(inst, stackslot, mode, stackslotFlags); |
| if (register.equals(newRegister) || stackslot.equals(newStackSlot)) { |
| return this; |
| } |
| return new ShadowedRegisterValue(newRegister, newStackSlot); |
| } |
| |
| @Override |
| protected void visitEachComponent(LIRInstruction inst, OperandMode mode, InstructionValueConsumer proc) { |
| proc.visitValue(inst, register, mode, registerFlags); |
| proc.visitValue(inst, stackslot, mode, stackslotFlags); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == null) { |
| return false; |
| } |
| if (this == obj) { |
| return true; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| ShadowedRegisterValue other = (ShadowedRegisterValue) obj; |
| assert register != null; |
| assert stackslot != null; |
| assert other.register != null; |
| assert other.stackslot != null; |
| if (!register.equals(other.register)) { |
| return false; |
| } |
| if (!stackslot.equals(other.stackslot)) { |
| return false; |
| } |
| return true; |
| } |
| |
| } |