# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1356010975 -3600
# Node ID 718f6161f3196fac9f00a9b80d8f598747807046
# Parent  dc3e86fd3be12244efc3e1cf7fb8added50fcdd2
Added constant propagation to BoxNode.

diff -r dc3e86fd3be1 -r 718f6161f319 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/BoxNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/BoxNode.java	Thu Dec 20 14:38:06 2012 +0100
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/BoxNode.java	Thu Dec 20 14:42:55 2012 +0100
@@ -65,6 +65,33 @@
 
     @Override
     public ValueNode canonical(CanonicalizerTool tool) {
+
+        if (source.isConstant()) {
+            Constant sourceConstant = source.asConstant();
+            switch (sourceKind) {
+                case Boolean:
+                    return ConstantNode.forObject(Boolean.valueOf(sourceConstant.asBoolean()), tool.runtime(), graph());
+                case Byte:
+                    return ConstantNode.forObject(Byte.valueOf((byte) sourceConstant.asInt()), tool.runtime(), graph());
+                case Char:
+                    return ConstantNode.forObject(Character.valueOf((char) sourceConstant.asInt()), tool.runtime(), graph());
+                case Short:
+                    return ConstantNode.forObject(Short.valueOf((short) sourceConstant.asInt()), tool.runtime(), graph());
+                case Int:
+                    return ConstantNode.forObject(Integer.valueOf(sourceConstant.asInt()), tool.runtime(), graph());
+                case Long:
+                    return ConstantNode.forObject(Long.valueOf(sourceConstant.asLong()), tool.runtime(), graph());
+                case Float:
+                    return ConstantNode.forObject(Float.valueOf(sourceConstant.asFloat()), tool.runtime(), graph());
+                case Double:
+                    return ConstantNode.forObject(Double.valueOf(sourceConstant.asDouble()), tool.runtime(), graph());
+                default:
+                    assert false : "Unexpected source kind for boxing";
+                    break;
+
+            }
+        }
+
         for (Node usage : usages()) {
             if (usage != stateAfter()) {
                 return this;