Mercurial > hg > truffle
view graal/com.oracle.graal.lir/src/com/oracle/graal/lir/stackslotalloc/StackInterval.java @ 19031:beb7c10b7747
Move StackSlotAllocators into a package.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Tue, 13 Jan 2015 17:52:18 +0100 |
parents | graal/com.oracle.graal.lir/src/com/oracle/graal/lir/framemap/StackInterval.java@f59fc4850df5 |
children | cc2b817de0b5 |
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/* * Copyright (c) 2014, 2014, 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.stackslotalloc; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.debug.*; public class StackInterval { private static final int INVALID_START = Integer.MAX_VALUE; private static final int INVALID_END = Integer.MIN_VALUE; private final VirtualStackSlot operand; private final LIRKind kind; private int from = INVALID_START; private int to = INVALID_END; private final StackUsePosList usePos; private StackSlot location; public enum UseType { // Prefixes for c1viz M_USE, S_DEF } public StackInterval(VirtualStackSlot operand, LIRKind kind) { this.operand = operand; this.kind = kind; this.usePos = new StackUsePosList(); } public boolean verify(LSStackSlotAllocator.Allocator allocator) { assert usePosList().verify(); // maxOpId + 1 it the last position in the last block (i.e. the "write position") assert from >= 0 && to <= allocator.maxOpId() + 1 : String.format("from %d, to %d, maxOpId %d", from, to, allocator.maxOpId()); return true; } public VirtualStackSlot getOperand() { return operand; } public void addUse(int opId) { addTo(opId); Debug.log("Adding use pos: %d", opId); usePos.add(opId, UseType.M_USE); } public void addDef(int opId) { addFrom(opId); Debug.log("Adding def pos: %d", opId); usePos.add(opId, UseType.S_DEF); } public void addTo(int opId) { if (opId >= to) { to = opId; } } protected void addFrom(int opId) { if (from > opId) { from = opId; // set opId also as to if it has not yet been set if (to == INVALID_END) { to = opId; } } } public LIRKind kind() { return kind; } public StackSlot location() { return location; } public void setLocation(StackSlot location) { this.location = location; } public StackInterval locationHint() { return null; } public int from() { return from; } public int to() { return to; } public StackUsePosList usePosList() { return usePos; } public void fixFrom() { if (from == INVALID_START) { from = 0; } } public boolean isFixed() { return from == 0; } @Override public String toString() { return String.format("SI[%d-%d] k=%s o=%s l=%s", from, to, kind, operand, location); } }