dart2js cps: Introduce GetStatic/SetStatic.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
index 9f0b7a0cb543960c497a6feb3676b51a733983b9..000a8523307644e2daff297f2b58a100c5970a17 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes.dart
@@ -214,7 +214,7 @@ abstract class InteriorNode extends Node {
   void set body(Expression body);
 }
 
-/// Invoke a static function or static field getter/setter.
+/// Invoke a static function or static getter/setter.
 class InvokeStatic extends Expression implements Invoke {
   /// [FunctionElement] or [FieldElement].
   final Entity target;
@@ -624,6 +624,34 @@ class GetField extends Primitive implements JsSpecificNode {
   accept(Visitor visitor) => visitor.visitGetField(this);
 }
 
+/// Reads the value of a static field or tears off a static method.
+class GetStatic extends Primitive {
+  final Element element;
+  final SourceInformation sourceInformation;
+
+  GetStatic(this.element, this.sourceInformation);
+
+  accept(Visitor visitor) => visitor.visitGetStatic(this);
+}
+
+/// Sets the value of a static field.
+class SetStatic extends Expression implements InteriorNode {
+  final Element element;
+  final Reference<Primitive> value;
+  Expression body;
+  final SourceInformation sourceInformation;
+
+  SetStatic(this.element, Primitive value, this.sourceInformation)
+      : this.value = new Reference<Primitive>(value);
+
+  Expression plug(Expression expr) {
+    assert(body == null);
+    return body = expr;
+  }
+
+  accept(Visitor visitor) => visitor.visitSetStatic(this);
+}
+
 /// Creates an object for holding boxed variables captured by a closure.
 class CreateBox extends Primitive implements JsSpecificNode {
   accept(Visitor visitor) => visitor.visitCreateBox(this);
@@ -1005,6 +1033,7 @@ abstract class Visitor<T> {
   T visitTypeOperator(TypeOperator node);
   T visitSetMutableVariable(SetMutableVariable node);
   T visitDeclareFunction(DeclareFunction node);
+  T visitSetStatic(SetStatic node);
 
   // Definitions.
   T visitLiteralList(LiteralList node);
@@ -1017,6 +1046,7 @@ abstract class Visitor<T> {
   T visitContinuation(Continuation node);
   T visitMutableVariable(MutableVariable node);
   T visitNonTailThrow(NonTailThrow node);
+  T visitGetStatic(GetStatic node);
 
   // JavaScript specific nodes.
 
@@ -1313,6 +1343,18 @@ class RecursiveVisitor implements Visitor {
     processReference(node.object);
   }
 
+  processGetStatic(GetStatic node) {}
+  visitGetStatic(GetStatic node) {
+    processGetStatic(node);
+  }
+
+  processSetStatic(SetStatic node) {}
+  visitSetStatic(SetStatic node) {
+    processSetStatic(node);
+    processReference(node.value);
+    visit(node.body);
+  }
+
   processCreateBox(CreateBox node) {}
   visitCreateBox(CreateBox node) {
     processCreateBox(node);