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view graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/SSALifetimeAnalysis.java @ 21319:9ddb5a749eab
LinearScan: use multiline comments.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Tue, 12 May 2015 10:16:43 +0200 |
parents | fd18bffefcc1 |
children | 1c56b7be2731 |
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/* * 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 com.oracle.graal.lir.alloc.lsra; import java.util.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.debug.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.LIRInstruction.*; import com.oracle.graal.lir.StandardOp.*; import com.oracle.graal.lir.ssa.*; public class SSALifetimeAnalysis extends LifetimeAnalysis { SSALifetimeAnalysis(LinearScan linearScan) { super(linearScan); } @Override 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); SSAUtils.forEachPhiRegisterHint(allocator.ir, 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); } }); } } private 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); } } } }