# HG changeset patch
# User Doug Simon <doug.simon@oracle.com>
# Date 1349100159 -7200
# Node ID 5d398a326315474f965c1f8729b5e2d76162dca5
# Parent  3d6a1007190d7db6adfc702f1916fb8ddf2faa7e
documented PiNode

diff -r 3d6a1007190d -r 5d398a326315 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/PiNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/PiNode.java	Mon Oct 01 16:01:36 2012 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/PiNode.java	Mon Oct 01 16:02:39 2012 +0200
@@ -26,7 +26,11 @@
 import com.oracle.graal.nodes.spi.*;
 import com.oracle.graal.nodes.type.*;
 
-
+/**
+ * A node that changes the type of its input, usually narrowing it.
+ * For example, a PI node refines the type of a receiver during
+ * type-guarded inlining to be the type tested by the guard.
+ */
 public class PiNode extends FloatingNode implements LIRLowerable {
 
     @Input private ValueNode object;