Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultVirtualFrame.java @ 11956:8a6d0cd7971b
Label: allocate ArrayList lazily
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Thu, 10 Oct 2013 13:03:26 +0200 |
parents | 269e6794e1ec |
children | 139b84d713bc |
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/* * Copyright (c) 2012, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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.truffle.api.impl; import java.util.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; public final class DefaultVirtualFrame implements VirtualFrame { private final FrameDescriptor descriptor; private final PackedFrame caller; private final Arguments arguments; private Object[] locals; private byte[] tags; public DefaultVirtualFrame(FrameDescriptor descriptor, PackedFrame caller, Arguments arguments) { this.descriptor = descriptor; this.caller = caller; this.arguments = arguments; this.locals = new Object[descriptor.getSize()]; Arrays.fill(locals, descriptor.getTypeConversion().getDefaultValue()); this.tags = new byte[descriptor.getSize()]; } @SuppressWarnings("unchecked") @Override public <T extends Arguments> T getArguments(Class<T> clazz) { return (T) arguments; } @Override public PackedFrame getCaller() { return caller; } @Override public PackedFrame pack() { return new DefaultPackedFrame(this); } @Override public MaterializedFrame materialize() { return new DefaultMaterializedFrame(this); } @Override public Object getObject(FrameSlot slot) throws FrameSlotTypeException { verifyGet(slot, FrameSlotKind.Object); return locals[slot.getIndex()]; } @Override public void setObject(FrameSlot slot, Object value) { verifySetObject(slot); locals[slot.getIndex()] = value; } @Override public byte getByte(FrameSlot slot) throws FrameSlotTypeException { verifyGet(slot, FrameSlotKind.Byte); return (byte) locals[slot.getIndex()]; } @Override public void setByte(FrameSlot slot, byte value) throws FrameSlotTypeException { verifySet(slot, FrameSlotKind.Byte); locals[slot.getIndex()] = value; } @Override public boolean getBoolean(FrameSlot slot) throws FrameSlotTypeException { verifyGet(slot, FrameSlotKind.Boolean); return (boolean) locals[slot.getIndex()]; } @Override public void setBoolean(FrameSlot slot, boolean value) throws FrameSlotTypeException { verifySet(slot, FrameSlotKind.Boolean); locals[slot.getIndex()] = value; } @Override public int getInt(FrameSlot slot) throws FrameSlotTypeException { verifyGet(slot, FrameSlotKind.Int); return (int) locals[slot.getIndex()]; } @Override public void setInt(FrameSlot slot, int value) throws FrameSlotTypeException { verifySet(slot, FrameSlotKind.Int); locals[slot.getIndex()] = value; } @Override public long getLong(FrameSlot slot) throws FrameSlotTypeException { verifyGet(slot, FrameSlotKind.Long); return (long) locals[slot.getIndex()]; } @Override public void setLong(FrameSlot slot, long value) throws FrameSlotTypeException { verifySet(slot, FrameSlotKind.Long); locals[slot.getIndex()] = value; } @Override public float getFloat(FrameSlot slot) throws FrameSlotTypeException { verifyGet(slot, FrameSlotKind.Float); return (float) locals[slot.getIndex()]; } @Override public void setFloat(FrameSlot slot, float value) throws FrameSlotTypeException { verifySet(slot, FrameSlotKind.Float); locals[slot.getIndex()] = value; } @Override public double getDouble(FrameSlot slot) throws FrameSlotTypeException { verifyGet(slot, FrameSlotKind.Double); return (double) locals[slot.getIndex()]; } @Override public void setDouble(FrameSlot slot, double value) throws FrameSlotTypeException { verifySet(slot, FrameSlotKind.Double); locals[slot.getIndex()] = value; } @Override public FrameDescriptor getFrameDescriptor() { return this.descriptor; } @Override public Object getValue(FrameSlot slot) { int slotIndex = slot.getIndex(); if (slotIndex >= tags.length) { resize(); } return locals[slotIndex]; } private void verifySet(FrameSlot slot, FrameSlotKind accessKind) throws FrameSlotTypeException { FrameSlotKind slotKind = slot.getKind(); if (slotKind != accessKind) { if (slotKind == FrameSlotKind.Illegal) { slot.setKind(accessKind); } else { throw new FrameSlotTypeException(); } } int slotIndex = slot.getIndex(); if (slotIndex >= tags.length) { resize(); } tags[slotIndex] = (byte) accessKind.ordinal(); } private void verifySetObject(FrameSlot slot) { if (slot.getKind() != FrameSlotKind.Object) { slot.setKind(FrameSlotKind.Object); } int slotIndex = slot.getIndex(); if (slotIndex >= tags.length) { resize(); } tags[slotIndex] = (byte) FrameSlotKind.Object.ordinal(); } private void verifyGet(FrameSlot slot, FrameSlotKind accessKind) throws FrameSlotTypeException { int slotIndex = slot.getIndex(); if (slotIndex >= tags.length) { resize(); } byte tag = tags[slotIndex]; if (accessKind == FrameSlotKind.Object ? (tag & 0xfe) != 0 : tag != accessKind.ordinal()) { if (slot.getKind() == accessKind || tag == 0) { descriptor.getTypeConversion().updateFrameSlot(this, slot, getValue(slot)); if (tags[slotIndex] == accessKind.ordinal()) { return; } } throw new FrameSlotTypeException(); } } private void resize() { int oldSize = tags.length; int newSize = descriptor.getSize(); if (newSize > oldSize) { locals = Arrays.copyOf(locals, newSize); Arrays.fill(locals, oldSize, newSize, descriptor.getTypeConversion().getDefaultValue()); tags = Arrays.copyOf(tags, newSize); } } @Override public boolean isInitialized(FrameSlot slot) { int slotIndex = slot.getIndex(); if (slotIndex >= tags.length) { resize(); } return tags[slotIndex] != 0; } }