# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1423010490 -3600
# Node ID c2019f6e821b49d2d819c1dd90586ff8297bf667
# Parent  0b15114268c8eae5a61e868bdca2fc00be7a52da
Draft for ParameterPlugin.

diff -r 0b15114268c8 -r c2019f6e821b graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderConfiguration.java
--- a/graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderConfiguration.java	Wed Feb 04 01:26:51 2015 +0100
+++ b/graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderConfiguration.java	Wed Feb 04 01:41:30 2015 +0100
@@ -38,6 +38,7 @@
     private final boolean doLivenessAnalysis;
     private final boolean inlineTrivial;
     private GraphBuilderPlugins.LoadFieldPlugin loadFieldPlugin;
+    private GraphBuilderPlugins.ParameterPlugin parameterPlugin;
 
     public static enum DebugInfoMode {
         SafePointsOnly,
@@ -160,4 +161,12 @@
     public boolean shouldInlineTrivial() {
         return inlineTrivial;
     }
+
+    public GraphBuilderPlugins.ParameterPlugin getParameterPlugin() {
+        return parameterPlugin;
+    }
+
+    public void setParameterPlugin(GraphBuilderPlugins.ParameterPlugin parameterPlugin) {
+        this.parameterPlugin = parameterPlugin;
+    }
 }
diff -r 0b15114268c8 -r c2019f6e821b graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPhase.java
--- a/graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPhase.java	Wed Feb 04 01:26:51 2015 +0100
+++ b/graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPhase.java	Wed Feb 04 01:41:30 2015 +0100
@@ -124,7 +124,7 @@
             assert method.getCode() != null : "method must contain bytecodes: " + method;
             this.currentGraph = graph;
             HIRFrameStateBuilder frameState = new HIRFrameStateBuilder(method, graph, null);
-            frameState.initializeForMethodStart(graphBuilderConfig.eagerResolving());
+            frameState.initializeForMethodStart(graphBuilderConfig.eagerResolving(), this.graphBuilderConfig.getParameterPlugin());
             TTY.Filter filter = new TTY.Filter(PrintFilter.getValue(), method);
             try {
                 BytecodeParser parser = new BytecodeParser(metaAccess, method, graphBuilderConfig, optimisticOpts, entryBCI);
diff -r 0b15114268c8 -r c2019f6e821b graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPlugins.java
--- a/graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPlugins.java	Wed Feb 04 01:26:51 2015 +0100
+++ b/graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPlugins.java	Wed Feb 04 01:41:30 2015 +0100
@@ -30,6 +30,7 @@
 import com.oracle.graal.api.meta.*;
 import com.oracle.graal.compiler.common.*;
 import com.oracle.graal.nodes.*;
+import com.oracle.graal.nodes.calc.*;
 
 /**
  * Interface for managing a set of graph builder {@link GraphBuilderPlugin}s.
@@ -40,6 +41,10 @@
         boolean apply(GraphBuilderContext builder, ValueNode receiver, ResolvedJavaField field);
     }
 
+    public interface ParameterPlugin extends GraphBuilderPlugin {
+        FloatingNode interceptParameter(int index);
+    }
+
     /**
      * Plugin for handling a method invocation.
      */
diff -r 0b15114268c8 -r c2019f6e821b graal/com.oracle.graal.java/src/com/oracle/graal/java/HIRFrameStateBuilder.java
--- a/graal/com.oracle.graal.java/src/com/oracle/graal/java/HIRFrameStateBuilder.java	Wed Feb 04 01:26:51 2015 +0100
+++ b/graal/com.oracle.graal.java/src/com/oracle/graal/java/HIRFrameStateBuilder.java	Wed Feb 04 01:41:30 2015 +0100
@@ -31,6 +31,7 @@
 import com.oracle.graal.api.meta.*;
 import com.oracle.graal.compiler.common.type.*;
 import com.oracle.graal.debug.*;
+import com.oracle.graal.java.GraphBuilderPlugins.ParameterPlugin;
 import com.oracle.graal.nodeinfo.*;
 import com.oracle.graal.nodes.*;
 import com.oracle.graal.nodes.calc.*;
@@ -81,14 +82,20 @@
         }
     }
 
-    public final void initializeForMethodStart(boolean eagerResolve) {
+    public final void initializeForMethodStart(boolean eagerResolve, ParameterPlugin parameterPlugin) {
 
         int javaIndex = 0;
         int index = 0;
         if (!method.isStatic()) {
             // add the receiver
-            ParameterNode receiver = graph.unique(new ParameterNode(javaIndex, StampFactory.declaredNonNull(method.getDeclaringClass())));
-            storeLocal(javaIndex, receiver);
+            FloatingNode receiver = null;
+            if (parameterPlugin != null) {
+                receiver = parameterPlugin.interceptParameter(index);
+            }
+            if (receiver == null) {
+                receiver = new ParameterNode(javaIndex, StampFactory.declaredNonNull(method.getDeclaringClass()));
+            }
+            storeLocal(javaIndex, graph.unique(receiver));
             javaIndex = 1;
             index = 1;
         }
@@ -107,8 +114,14 @@
             } else {
                 stamp = StampFactory.forKind(kind);
             }
-            ParameterNode param = graph.unique(new ParameterNode(index, stamp));
-            storeLocal(javaIndex, param);
+            FloatingNode param = null;
+            if (parameterPlugin != null) {
+                param = parameterPlugin.interceptParameter(index);
+            }
+            if (param == null) {
+                param = new ParameterNode(index, stamp);
+            }
+            storeLocal(javaIndex, graph.unique(param));
             javaIndex += kind.getSlotCount();
             index++;
         }
diff -r 0b15114268c8 -r c2019f6e821b graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/PartialEvaluator.java
--- a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/PartialEvaluator.java	Wed Feb 04 01:26:51 2015 +0100
+++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/PartialEvaluator.java	Wed Feb 04 01:41:30 2015 +0100
@@ -40,6 +40,7 @@
 import com.oracle.graal.loop.*;
 import com.oracle.graal.nodes.CallTargetNode.InvokeKind;
 import com.oracle.graal.nodes.*;
+import com.oracle.graal.nodes.calc.*;
 import com.oracle.graal.nodes.java.*;
 import com.oracle.graal.nodes.spi.*;
 import com.oracle.graal.nodes.util.*;
@@ -149,10 +150,27 @@
 
     };
 
+    private class InterceptReceiverPlugin implements GraphBuilderPlugins.ParameterPlugin {
+
+        private final Object receiver;
+
+        public InterceptReceiverPlugin(Object receiver) {
+            this.receiver = receiver;
+        }
+
+        public FloatingNode interceptParameter(int index) {
+            if (index == 0) {
+                return ConstantNode.forConstant(snippetReflection.forObject(receiver), providers.getMetaAccess());
+            }
+            return null;
+        }
+    }
+
     @SuppressWarnings("unused")
     private void fastPartialEvaluation(OptimizedCallTarget callTarget, Assumptions assumptions, StructuredGraph graph, PhaseContext baseContext, HighTierContext tierContext) {
         GraphBuilderConfiguration newConfig = configForRoot.copy();
         newConfig.setLoadFieldPlugin(loadFieldPlugin);
+        newConfig.setParameterPlugin(new InterceptReceiverPlugin(callTarget));
         new GraphBuilderPhase.Instance(providers.getMetaAccess(), providers.getStampProvider(), new Assumptions(false), newConfig, TruffleCompilerImpl.Optimizations).apply(graph);
         Debug.dump(graph, "After FastPE");
     }