Mercurial > hg > truffle
view graal/com.oracle.graal.lir/src/com/oracle/graal/lir/stackslotalloc/StackInterval.java @ 19081:3ec39188b0ee
StackInterval: remove use position list.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Sat, 31 Jan 2015 10:49:20 +0100 |
parents | e22286559a8b |
children | 09292c24d555 |
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/* * 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 com.oracle.graal.lir.stackslotalloc; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; public final 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 StackSlot location; public StackInterval(VirtualStackSlot operand, LIRKind kind) { this.operand = operand; this.kind = kind; } public boolean verify(LSStackSlotAllocator.Allocator allocator) { // 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 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 int from() { return from; } public int to() { return to; } 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); } }