Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/memory/FloatingReadNode.java @ 21783:a858c5f56d8a
Introduce AddressNode to represent pointer arithmetic, remove LocationNode.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 08 Jun 2015 18:47:58 +0200 |
parents | 47bebae7454f |
children | db885c930362 |
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/* * Copyright (c) 2011, 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.nodes.memory; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.memory.address.*; import com.oracle.graal.nodes.spi.*; import com.oracle.jvmci.meta.*; /** * A floating read of a value from memory specified in terms of an object base and an object * relative location. This node does not null check the object. */ @NodeInfo public final class FloatingReadNode extends FloatingAccessNode implements LIRLowerable, Canonicalizable { public static final NodeClass<FloatingReadNode> TYPE = NodeClass.create(FloatingReadNode.class); @OptionalInput(InputType.Memory) MemoryNode lastLocationAccess; public FloatingReadNode(AddressNode address, LocationIdentity location, MemoryNode lastLocationAccess, Stamp stamp) { this(address, location, lastLocationAccess, stamp, null, BarrierType.NONE); } public FloatingReadNode(AddressNode address, LocationIdentity location, MemoryNode lastLocationAccess, Stamp stamp, GuardingNode guard) { this(address, location, lastLocationAccess, stamp, guard, BarrierType.NONE); } public FloatingReadNode(AddressNode address, LocationIdentity location, MemoryNode lastLocationAccess, Stamp stamp, GuardingNode guard, BarrierType barrierType) { super(TYPE, address, location, stamp, guard, barrierType); this.lastLocationAccess = lastLocationAccess; } public MemoryNode getLastLocationAccess() { return lastLocationAccess; } public void setLastLocationAccess(MemoryNode newlla) { updateUsages(ValueNodeUtil.asNode(lastLocationAccess), ValueNodeUtil.asNode(newlla)); lastLocationAccess = newlla; } @Override public void generate(NodeLIRBuilderTool gen) { LIRKind readKind = gen.getLIRGeneratorTool().getLIRKind(stamp()); gen.setResult(this, gen.getLIRGeneratorTool().emitLoad(readKind, gen.operand(address), null)); } @Override public Node canonical(CanonicalizerTool tool) { if (getAddress() instanceof OffsetAddressNode) { OffsetAddressNode objAddress = (OffsetAddressNode) getAddress(); if (objAddress.getBase() instanceof PiNode && ((PiNode) objAddress.getBase()).getGuard() == getGuard()) { OffsetAddressNode newAddress = new OffsetAddressNode(((PiNode) objAddress.getBase()).getOriginalNode(), objAddress.getOffset()); return new FloatingReadNode(newAddress, getLocationIdentity(), getLastLocationAccess(), stamp(), getGuard(), getBarrierType()); } } return ReadNode.canonicalizeRead(this, getAddress(), getLocationIdentity(), tool); } @Override public FixedAccessNode asFixedNode() { return graph().add(new ReadNode(getAddress(), getLocationIdentity(), stamp(), getGuard(), getBarrierType())); } @Override public boolean verify() { MemoryNode lla = getLastLocationAccess(); assert lla != null || getLocationIdentity().isImmutable() : "lastLocationAccess of " + this + " shouldn't be null for mutable location identity " + getLocationIdentity(); return super.verify(); } }