cps-ir: Add support for intercepted calls.

pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart

Index: pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart
diff --git a/pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart b/pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart
index 4c614c977ef00e8f1f3f49bf17a7089f411071f4..86e88faf8c23894f9e576830d3a2f037d14c172d 100644
--- a/pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart
+++ b/pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart
@@ -9,6 +9,7 @@ import '../dart_types.dart';
 import '../elements/elements.dart';
 import '../cps_ir/cps_ir_nodes.dart' as cps_ir;
 import 'tree_ir_nodes.dart';
+import '../js_backend/codegen/glue.dart';
 
 /**
  * Builder translates from CPS-based IR to direct-style Tree.
@@ -43,7 +44,9 @@ import 'tree_ir_nodes.dart';
  * still all named.
  */
 class Builder extends cps_ir.Visitor<Node> {
+  // TODO(karlklose): remove the compiler.
   final dart2js.Compiler compiler;
+  final Glue glue;
 
   /// Maps variable/parameter elements to the Tree variables that represent it.
   final Map<Element, List<Variable>> element2variables =
@@ -62,10 +65,11 @@ class Builder extends cps_ir.Visitor<Node> {
 
   Builder parent;
 
-  Builder(this.compiler);
+  Builder(this.glue, this.compiler);
 
   Builder.inner(Builder parent)
       : this.parent = parent,
+        this.glue = parent.glue,
         compiler = parent.compiler;
 
   /// Variable used in [buildPhiAssignments] as a temporary when swapping
@@ -162,7 +166,8 @@ class Builder extends cps_ir.Visitor<Node> {
 
   List<Expression> translateArguments(List<cps_ir.Reference> args) {
     return new List<Expression>.generate(args.length,
-         (int index) => getVariableReference(args[index]));
+         (int index) => getVariableReference(args[index]),
+         growable: false);
   }
 
   List<Variable> translatePhiArguments(List<cps_ir.Reference> args) {
@@ -316,9 +321,9 @@ class Builder extends cps_ir.Visitor<Node> {
   }
 
   Statement visitInvokeMethod(cps_ir.InvokeMethod node) {
-    Expression receiver = getVariableReference(node.receiver);
-    List<Expression> arguments = translateArguments(node.arguments);
-    Expression invoke = new InvokeMethod(receiver, node.selector, arguments);
+    Expression invoke = new InvokeMethod(getVariableReference(node.receiver),
+                                         node.selector,
+                                         translateArguments(node.arguments));
     return continueWithExpression(node.continuation, invoke);
   }
 
@@ -480,14 +485,16 @@ class Builder extends cps_ir.Visitor<Node> {
   Expression visitParameter(cps_ir.Parameter node) {
     // Continuation parameters are not visited (continuations themselves are
     // not visited yet).
-    compiler.internalError(compiler.currentElement, 'Unexpected IR node.');
+    compiler.internalError(compiler.currentElement,
+        'Unexpected IR node: $node');
     return null;
   }
 
   Expression visitContinuation(cps_ir.Continuation node) {
     // Until continuations with multiple uses are supported, they are not
     // visited.
-    compiler.internalError(compiler.currentElement, 'Unexpected IR node.');
+    compiler.internalError(compiler.currentElement,
+        'Unexpected IR node: $node.');
     return null;
   }
 
@@ -506,5 +513,14 @@ class Builder extends cps_ir.Visitor<Node> {
         <Expression>[getVariableReference(node.left),
                      getVariableReference(node.right)]);
   }
+
+  Expression visitInterceptor(cps_ir.Interceptor node) {
+    Element getInterceptor = glue.getInterceptorMethod;
+    glue.registerUseInterceptorInCodegen();
+    return new InvokeStatic(
+        getInterceptor,
+        new dart2js.Selector.fromElement(getInterceptor),
+        <Expression>[getVariableReference(node.input)]);
+  }
 }