--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotHostForeignCallsProvider.java	Thu Apr 03 15:26:21 2014 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotHostForeignCallsProvider.java	Thu Apr 03 15:03:45 2014 +0200
@@ -27,7 +27,6 @@
 import static com.oracle.graal.hotspot.HotSpotBackend.*;
 import static com.oracle.graal.hotspot.HotSpotForeignCallLinkage.RegisterEffect.*;
 import static com.oracle.graal.hotspot.HotSpotForeignCallLinkage.Transition.*;
-import static com.oracle.graal.hotspot.nodes.MonitorExitStubCall.*;
 import static com.oracle.graal.hotspot.nodes.NewArrayStubCall.*;
 import static com.oracle.graal.hotspot.nodes.NewInstanceStubCall.*;
 import static com.oracle.graal.hotspot.nodes.NewMultiArrayStubCall.*;
@@ -131,7 +130,7 @@
         linkForeignCall(providers, CREATE_NULL_POINTER_EXCEPTION, c.createNullPointerExceptionAddress, PREPEND_THREAD, NOT_LEAF, REEXECUTABLE, ANY_LOCATION);
         linkForeignCall(providers, CREATE_OUT_OF_BOUNDS_EXCEPTION, c.createOutOfBoundsExceptionAddress, PREPEND_THREAD, NOT_LEAF, REEXECUTABLE, ANY_LOCATION);
         linkForeignCall(providers, MONITORENTER, c.monitorenterAddress, PREPEND_THREAD, NOT_LEAF, NOT_REEXECUTABLE, ANY_LOCATION);
-        linkForeignCall(providers, MONITOREXIT, c.monitorexitAddress, PREPEND_THREAD, NOT_LEAF, NOT_REEXECUTABLE, ANY_LOCATION);
+        linkForeignCall(providers, MONITOREXIT, c.monitorexitAddress, PREPEND_THREAD, LEAF_SP, NOT_REEXECUTABLE, ANY_LOCATION);
         linkForeignCall(providers, NEW_MULTI_ARRAY, c.newMultiArrayAddress, PREPEND_THREAD, NOT_LEAF, REEXECUTABLE, INIT_LOCATION);
         linkForeignCall(providers, DYNAMIC_NEW_ARRAY, c.dynamicNewArrayAddress, PREPEND_THREAD, NOT_LEAF, REEXECUTABLE, INIT_LOCATION);
         linkForeignCall(providers, DYNAMIC_NEW_INSTANCE, c.dynamicNewInstanceAddress, PREPEND_THREAD, NOT_LEAF, REEXECUTABLE, INIT_LOCATION);

--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/MonitorExitStubCall.java	Thu Apr 03 15:26:21 2014 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,60 +0,0 @@
-/*
- * 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.
- *
- * 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.hotspot.nodes;
-
-import com.oracle.graal.api.code.*;
-import com.oracle.graal.api.meta.*;
-import com.oracle.graal.compiler.gen.*;
-import com.oracle.graal.compiler.target.*;
-import com.oracle.graal.hotspot.*;
-import com.oracle.graal.nodes.*;
-import com.oracle.graal.nodes.type.*;
-import com.oracle.graal.word.*;
-
-/**
- * Node implementing a call to {@code GraalRuntime::monitorexit}.
- */
-public class MonitorExitStubCall extends DeoptimizingStubCall implements LIRGenLowerable {
-
-    @Input private ValueNode object;
-    private int lockDepth;
-    public static final ForeignCallDescriptor MONITOREXIT = new ForeignCallDescriptor("monitorexit", void.class, Object.class, Word.class);
-
-    public MonitorExitStubCall(ValueNode object, int lockDepth) {
-        super(StampFactory.forVoid());
-        this.object = object;
-        this.lockDepth = lockDepth;
-    }
-
-    @Override
-    public void generate(NodeLIRBuilder gen) {
-        assert lockDepth != -1;
-        HotSpotLIRGenerator hsGen = (HotSpotLIRGenerator) gen.getLIRGeneratorTool();
-        StackSlot slot = hsGen.getLockSlot(lockDepth);
-        ForeignCallLinkage linkage = gen.getLIRGeneratorTool().getForeignCalls().lookupForeignCall(MonitorExitStubCall.MONITOREXIT);
-        gen.getLIRGeneratorTool().emitForeignCall(linkage, this, gen.operand(object), gen.getLIRGeneratorTool().emitAddress(slot));
-    }
-
-    @NodeIntrinsic
-    public static native void call(Object object, @ConstantNodeParameter int lockDepth);
-}

--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/MonitorSnippets.java	Thu Apr 03 15:26:21 2014 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/MonitorSnippets.java	Thu Apr 03 15:03:45 2014 +0200
@@ -59,7 +59,7 @@
 
 /**
  * Snippets used for implementing the monitorenter and monitorexit instructions.
- * 
+ *
  * The locking algorithm used is described in the paper <a
  * href="http://dl.acm.org/citation.cfm?id=1167515.1167496"> Eliminating synchronization-related
  * atomic operations with biased locking and bulk rebiasing</a> by Kenneth Russell and David
@@ -325,7 +325,7 @@
                 // The object's mark word was not pointing to the displaced header,
                 // we do unlocking via runtime call.
                 traceObject(trace, "-lock{stub}", object, false);
-                MonitorExitStubCall.call(object, lockDepth);
+                monitorexitStub(MONITOREXIT, object, lock);
             } else {
                 traceObject(trace, "-lock{cas}", object, false);
             }
@@ -341,7 +341,8 @@
     public static void monitorexitStub(Object object, @ConstantParameter int lockDepth, @ConstantParameter boolean trace) {
         verifyOop(object);
         traceObject(trace, "-lock{stub}", object, false);
-        MonitorExitStubCall.call(object, lockDepth);
+        final Word lock = CurrentLockNode.currentLock(lockDepth);
+        monitorexitStub(MONITOREXIT, object, lock);
         endLockScope();
         decCounter();
     }
@@ -528,8 +529,12 @@
     }
 
     public static final ForeignCallDescriptor MONITORENTER = new ForeignCallDescriptor("monitorenter", void.class, Object.class, Word.class);
+    public static final ForeignCallDescriptor MONITOREXIT = new ForeignCallDescriptor("monitorexit", void.class, Object.class, Word.class);
 
     @NodeIntrinsic(ForeignCallNode.class)
     private static native void monitorenterStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Object object, Word lock);
 
+    @NodeIntrinsic(ForeignCallNode.class)
+    private static native void monitorexitStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Object object, Word lock);
+
 }