# HG changeset patch
# User Lukas Stadler <lukas.stadler@jku.at>
# Date 1375893375 -7200
# Node ID fe5ce6520b6c0a7ccab9a76b1d817bc0926010e7
# Parent  80c0b5c2ec082e20b210c743140ce60ea53bdb20
macro node for NodeClass.get(Class)

diff -r 80c0b5c2ec08 -r fe5ce6520b6c graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/NodeClassSubstitutions.java
--- a/graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/NodeClassSubstitutions.java	Wed Aug 07 18:35:59 2013 +0200
+++ b/graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/NodeClassSubstitutions.java	Wed Aug 07 18:36:15 2013 +0200
@@ -25,7 +25,10 @@
 import com.oracle.graal.api.meta.*;
 import com.oracle.graal.api.replacements.*;
 import com.oracle.graal.graph.*;
+import com.oracle.graal.nodes.*;
 import com.oracle.graal.nodes.extended.*;
+import com.oracle.graal.nodes.spi.*;
+import com.oracle.graal.replacements.nodes.*;
 
 /**
  * Substitutions for improving the performance of some critical methods in {@link NodeClass}
@@ -37,6 +40,26 @@
 @ClassSubstitution(NodeClass.class)
 public class NodeClassSubstitutions {
 
+    /**
+     * A macro node for calls to {@link NodeClass#get(Class)}. It can use the compiler's knowledge
+     * about node classes to replace itself with a constant value for a constant {@link Class}
+     * parameter.
+     */
+    public static class NodeClassGetNode extends PureFunctionMacroNode {
+
+        public NodeClassGetNode(Invoke invoke) {
+            super(invoke);
+        }
+
+        @Override
+        protected Constant evaluate(Constant param, MetaAccessProvider metaAccess) {
+            return Constant.forObject(NodeClass.get((Class<?>) param.asObject()));
+        }
+    }
+
+    @MacroSubstitution(isStatic = true, forced = true, macro = NodeClassGetNode.class)
+    private static native NodeClass get(Class<?> c);
+
     @MethodSubstitution
     private static Node getNode(Node node, long offset) {
         return UnsafeCastNode.unsafeCast(UnsafeLoadNode.load(node, 0, offset, Kind.Object), Node.class, false, false);