| /* |
| * 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.lsra.ssa; |
| |
| import java.util.EnumSet; |
| |
| import org.graalvm.compiler.debug.Debug; |
| import org.graalvm.compiler.lir.LIRInstruction; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandFlag; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandMode; |
| import org.graalvm.compiler.lir.StandardOp.LabelOp; |
| import org.graalvm.compiler.lir.ValueConsumer; |
| import org.graalvm.compiler.lir.alloc.lsra.Interval; |
| import org.graalvm.compiler.lir.alloc.lsra.Interval.RegisterPriority; |
| import org.graalvm.compiler.lir.alloc.lsra.LinearScan; |
| import org.graalvm.compiler.lir.alloc.lsra.LinearScanLifetimeAnalysisPhase; |
| import org.graalvm.compiler.lir.ssa.SSAUtil; |
| |
| import jdk.vm.ci.meta.AllocatableValue; |
| import jdk.vm.ci.meta.Value; |
| |
| public class SSALinearScanLifetimeAnalysisPhase extends LinearScanLifetimeAnalysisPhase { |
| |
| SSALinearScanLifetimeAnalysisPhase(LinearScan linearScan) { |
| super(linearScan); |
| } |
| |
| @Override |
| protected void addRegisterHint(final LIRInstruction op, final Value targetValue, OperandMode mode, EnumSet<OperandFlag> flags, final boolean hintAtDef) { |
| super.addRegisterHint(op, targetValue, mode, flags, hintAtDef); |
| |
| if (hintAtDef && op instanceof LabelOp) { |
| LabelOp label = (LabelOp) op; |
| |
| Interval to = allocator.getOrCreateInterval((AllocatableValue) targetValue); |
| |
| SSAUtil.forEachPhiRegisterHint(allocator.getLIR(), allocator.blockForId(label.id()), label, targetValue, mode, (ValueConsumer) (registerHint, valueMode, valueFlags) -> { |
| if (LinearScan.isVariableOrRegister(registerHint)) { |
| Interval from = allocator.getOrCreateInterval((AllocatableValue) registerHint); |
| |
| setHint(op, to, from); |
| setHint(op, from, to); |
| } |
| }); |
| } |
| } |
| |
| public static void setHint(final LIRInstruction op, Interval target, Interval source) { |
| Interval currentHint = target.locationHint(false); |
| if (currentHint == null || currentHint.from() > target.from()) { |
| /* |
| * Update hint if there was none or if the hint interval starts after the hinted |
| * interval. |
| */ |
| target.setLocationHint(source); |
| if (Debug.isLogEnabled()) { |
| Debug.log("operation at opId %d: added hint from interval %d to %d", op.id(), source.operandNumber, target.operandNumber); |
| } |
| } |
| } |
| |
| @Override |
| protected RegisterPriority registerPriorityOfOutputOperand(LIRInstruction op) { |
| if (op instanceof LabelOp) { |
| LabelOp label = (LabelOp) op; |
| if (label.isPhiIn()) { |
| return RegisterPriority.None; |
| } |
| } |
| return super.registerPriorityOfOutputOperand(op); |
| } |
| } |