1 /*
   2  * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.hotspot.nodes;
  24 
  25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_3;
  26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2;
  27 
  28 import org.graalvm.compiler.core.common.type.StampFactory;
  29 import org.graalvm.compiler.graph.NodeClass;
  30 import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
  31 import org.graalvm.compiler.hotspot.stubs.DeoptimizationStub;
  32 import org.graalvm.compiler.nodeinfo.NodeInfo;
  33 import org.graalvm.compiler.nodes.FixedWithNextNode;
  34 import org.graalvm.compiler.nodes.ValueNode;
  35 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  36 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  37 import org.graalvm.compiler.word.Word;
  38 
  39 import jdk.vm.ci.meta.Value;
  40 
  41 /**
  42  * Emits code to leave (pop) the current low-level stack frame which is being deoptimized. This node
  43  * is only used in {@link DeoptimizationStub}.
  44  */
  45 @NodeInfo(cycles = CYCLES_3, size = SIZE_2)
  46 public final class LeaveDeoptimizedStackFrameNode extends FixedWithNextNode implements LIRLowerable {
  47 
  48     public static final NodeClass<LeaveDeoptimizedStackFrameNode> TYPE = NodeClass.create(LeaveDeoptimizedStackFrameNode.class);
  49     @Input ValueNode frameSize;
  50     @Input ValueNode initialInfo;
  51 
  52     public LeaveDeoptimizedStackFrameNode(ValueNode frameSize, ValueNode initialInfo) {
  53         super(TYPE, StampFactory.forVoid());
  54         this.frameSize = frameSize;
  55         this.initialInfo = initialInfo;
  56     }
  57 
  58     @Override
  59     public void generate(NodeLIRBuilderTool gen) {
  60         Value frameSizeValue = gen.operand(frameSize);
  61         Value initialInfoValue = gen.operand(initialInfo);
  62         ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitLeaveDeoptimizedStackFrame(frameSizeValue, initialInfoValue);
  63     }
  64 
  65     @NodeIntrinsic
  66     public static native void leaveDeoptimizedStackFrame(int frameSize, Word initialInfo);
  67 }