# HG changeset patch
# User Gilles Duboscq <duboscq@ssw.jku.at>
# Date 1370357603 -7200
# Node ID 30cab249529e58ae455148bec45778fb2b6c1e95
# Parent  538ac2cf3383d6149cd743e2c1845eda82c014da
When lowering a fixed guard, the usages should be forwarded to the floating guard instead of the value anchor.
FixedGuardNode should have a dependency stamp

diff -r 538ac2cf3383 -r 30cab249529e graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java	Tue Jun 04 15:22:43 2013 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java	Tue Jun 04 16:53:23 2013 +0200
@@ -634,7 +634,9 @@
             graph.replaceFixed(loadMethodNode, metaspaceMethod);
         } else if (n instanceof FixedGuardNode) {
             FixedGuardNode node = (FixedGuardNode) n;
-            ValueAnchorNode newAnchor = graph.add(new ValueAnchorNode(tool.createGuard(node.condition(), node.getReason(), node.getAction(), node.isNegated()).asNode()));
+            GuardingNode guard = tool.createGuard(node.condition(), node.getReason(), node.getAction(), node.isNegated());
+            ValueAnchorNode newAnchor = graph.add(new ValueAnchorNode(guard.asNode()));
+            node.replaceAtUsages(guard.asNode());
             graph.replaceFixedWithFixed(node, newAnchor);
         } else if (n instanceof CommitAllocationNode) {
             CommitAllocationNode commit = (CommitAllocationNode) n;
diff -r 538ac2cf3383 -r 30cab249529e graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/FixedGuardNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/FixedGuardNode.java	Tue Jun 04 15:22:43 2013 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/FixedGuardNode.java	Tue Jun 04 16:53:23 2013 +0200
@@ -25,12 +25,13 @@
 import com.oracle.graal.api.code.*;
 import com.oracle.graal.api.meta.*;
 import com.oracle.graal.graph.*;
+import com.oracle.graal.nodes.extended.*;
 import com.oracle.graal.nodes.spi.*;
 import com.oracle.graal.nodes.type.*;
 import com.oracle.graal.nodes.util.*;
 
 @NodeInfo(nameTemplate = "FixedGuard(!={p#negated}) {p#reason/s}")
-public final class FixedGuardNode extends FixedWithNextNode implements Simplifiable, Lowerable, Node.IterableNodeType, Negatable {
+public final class FixedGuardNode extends FixedWithNextNode implements Simplifiable, Lowerable, Node.IterableNodeType, Negatable, GuardingNode {
 
     @Input private LogicNode condition;
     private final DeoptimizationReason reason;
@@ -51,7 +52,7 @@
     }
 
     public FixedGuardNode(LogicNode condition, DeoptimizationReason deoptReason, DeoptimizationAction action, boolean negated) {
-        super(StampFactory.forVoid());
+        super(StampFactory.dependency());
         this.action = action;
         this.negated = negated;
         this.condition = condition;
@@ -84,6 +85,7 @@
         if (condition instanceof LogicConstantNode) {
             LogicConstantNode c = (LogicConstantNode) condition;
             if (c.getValue() != negated) {
+                this.replaceAtUsages(BeginNode.prevBegin(this));
                 graph().removeFixed(this);
             } else {
                 FixedNode next = this.next();
@@ -121,4 +123,9 @@
         negated = !negated;
         return this;
     }
+
+    @Override
+    public FixedGuardNode asNode() {
+        return this;
+    }
 }