# HG changeset patch
# User Lukas Stadler <lukas.stadler@oracle.com>
# Date 1396863128 -7200
# Node ID 9ecd3da04309f5df56a8cc3d8d58502a32c6ec15
# Parent  4b1f128a3d45da84041071a0df22b352d06354c7
use temporary proxy for locations in snippets

diff -r 4b1f128a3d45 -r 9ecd3da04309 graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/SnippetLocationProxyNode.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/SnippetLocationProxyNode.java	Mon Apr 07 11:32:08 2014 +0200
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2013, 2013, 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.graph.*;
+import com.oracle.graal.graph.spi.*;
+import com.oracle.graal.nodes.*;
+import com.oracle.graal.nodes.calc.*;
+import com.oracle.graal.nodes.extended.*;
+import com.oracle.graal.nodes.type.*;
+
+@NodeInfo(allowedUsageTypes = {InputType.Association})
+public final class SnippetLocationProxyNode extends FloatingNode implements Canonicalizable {
+
+    @Input(InputType.Unchecked) private ValueNode location;
+
+    public SnippetLocationProxyNode(ValueNode location) {
+        super(StampFactory.extension());
+        this.location = location;
+    }
+
+    @Override
+    public Node canonical(CanonicalizerTool tool) {
+        return location.isAllowedUsageType(InputType.Association) ? location : this;
+    }
+
+    @NodeIntrinsic
+    public static native GuardingNode location(Object location);
+}
diff -r 4b1f128a3d45 -r 9ecd3da04309 graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/WriteBarrierSnippets.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/WriteBarrierSnippets.java	Mon Apr 07 11:32:08 2014 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/WriteBarrierSnippets.java	Mon Apr 07 11:32:08 2014 +0200
@@ -72,7 +72,7 @@
         Object fixedObject = FixedValueAnchorNode.getObject(object);
         Pointer oop;
         if (usePrecise) {
-            oop = Word.fromArray(fixedObject, location);
+            oop = Word.fromArray(fixedObject, SnippetLocationProxyNode.location(location));
         } else {
             oop = Word.fromObject(fixedObject);
         }
@@ -117,7 +117,7 @@
         Object fixedObject = FixedValueAnchorNode.getObject(object);
         verifyOop(fixedObject);
         Object fixedExpectedObject = FixedValueAnchorNode.getObject(expectedObject);
-        Word field = (Word) Word.fromArray(fixedObject, location);
+        Word field = (Word) Word.fromArray(fixedObject, SnippetLocationProxyNode.location(location));
         Word previousOop = (Word) Word.fromObject(fixedExpectedObject);
         byte markingValue = thread.readByte(g1SATBQueueMarkingOffset());
         Word bufferAddress = thread.readWord(g1SATBQueueBufferOffset());
@@ -174,7 +174,7 @@
         validateObject(fixedObject, fixedValue);
         Word oop;
         if (usePrecise) {
-            oop = (Word) Word.fromArray(fixedObject, location);
+            oop = (Word) Word.fromArray(fixedObject, SnippetLocationProxyNode.location(location));
         } else {
             oop = (Word) Word.fromObject(fixedObject);
         }