Mercurial > hg > graal-jvmci-8
view graal/GraalCompiler/src/com/sun/c1x/ir/StateSplit.java @ 2634:4dd0573f510b
FrameState fixes.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 11 May 2011 10:52:37 +0200 |
parents | 569228710be8 |
children | 440ceca8e3d7 |
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/* * Copyright (c) 2009, 2011, 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.sun.c1x.ir; import com.oracle.graal.graph.*; import com.sun.c1x.value.*; import com.sun.cri.ci.*; /** * The {@code StateSplit} class is the abstract base class of all instructions * that store an immutable copy of the frame state. */ public abstract class StateSplit extends Instruction { private static final int INPUT_COUNT = 2; private static final int INPUT_STATE_AFTER = 0; private static final int INPUT_STATE_BEFORE = 1; private static final int SUCCESSOR_COUNT = 0; @Override protected int inputCount() { return super.inputCount() + INPUT_COUNT; } @Override protected int successorCount() { return super.successorCount() + SUCCESSOR_COUNT; } /** * The state for this instruction. */ @Override public FrameState stateAfter() { return (FrameState) inputs().get(super.inputCount() + INPUT_STATE_AFTER); } public FrameState setStateAfter(FrameState n) { if (n != null && this instanceof BlockBegin) { Exception e = new Exception(); e.printStackTrace(); } return (FrameState) inputs().set(super.inputCount() + INPUT_STATE_AFTER, n); } /** * The state for this instruction. */ public FrameState stateBefore() { return (FrameState) inputs().get(super.inputCount() + INPUT_STATE_BEFORE); } public FrameState setStateBefore(FrameState n) { return (FrameState) inputs().set(super.inputCount() + INPUT_STATE_BEFORE, n); } /** * Creates a new state split with the specified value type. * @param kind the type of the value that this instruction produces * @param inputCount * @param successorCount * @param graph */ public StateSplit(CiKind kind, int inputCount, int successorCount, Graph graph) { super(kind, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph); } @Override public boolean canTrap() { return true; } public boolean needsStateAfter() { return true; } }