Introduce ClassLike, MemberLike, FieldLike and FunctionLike

pkg/compiler/lib/src/ssa/codegen.dart

Index: pkg/compiler/lib/src/ssa/codegen.dart
diff --git a/pkg/compiler/lib/src/ssa/codegen.dart b/pkg/compiler/lib/src/ssa/codegen.dart
index a50cffe917f140279e31034cff91773381a878e2..777855c3b0e715228ca66b78dac0304bce6326fc 100644
--- a/pkg/compiler/lib/src/ssa/codegen.dart
+++ b/pkg/compiler/lib/src/ssa/codegen.dart
@@ -1582,7 +1582,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
     js.Expression object = pop();
     String methodName;
     List<js.Expression> arguments = visitArguments(node.inputs);
-    Element target = node.element;
+    MemberElement target = node.element;
 
     // TODO(herhut): The namer should return the appropriate backendname here.
     if (target != null && !node.isInterceptedCall) {
@@ -1680,7 +1680,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
     // If we don't know what we're calling or if we are calling a getter,
     // we need to register that fact that we may be calling a closure
     // with the same arguments.
-    Element target = node.element;
+    MemberElement target = node.element;
     if (target == null || target.isGetter) {
       // TODO(kasperl): If we have a typed selector for the call, we
       // may know something about the types of closures that need
@@ -1762,7 +1762,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
   }
 
   visitInvokeStatic(HInvokeStatic node) {
-    Element element = node.element;
+    MemberElement element = node.element;
     List<DartType> instantiatedTypes = node.instantiatedTypes;
 
     if (instantiatedTypes != null && !instantiatedTypes.isEmpty) {
@@ -1809,7 +1809,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
   }
 
   visitInvokeSuper(HInvokeSuper node) {
-    Element superElement = node.element;
+    MemberElement superElement = node.element;
     ClassElement superClass = superElement.enclosingClass;
     if (superElement.isField) {
       js.Name fieldName = backend.namer.instanceFieldPropertyName(superElement);
@@ -1867,7 +1867,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
 
   visitFieldGet(HFieldGet node) {
     use(node.receiver);
-    Element element = node.element;
+    MemberElement element = node.element;
     if (node.isNullCheck) {
       // We access a JavaScript member we know all objects besides
       // null and undefined have: V8 does not like accessing a member
@@ -1889,7 +1889,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
   }
 
   visitFieldSet(HFieldSet node) {
-    Element element = node.element;
+    MemberElement element = node.element;
     registry.registerStaticUse(new StaticUse.fieldSet(element));
     js.Name name = backend.namer.instanceFieldPropertyName(element);
     use(node.receiver);
@@ -1900,7 +1900,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
   }
 
   visitReadModifyWrite(HReadModifyWrite node) {
-    Element element = node.element;
+    FieldElement element = node.element;
     registry.registerStaticUse(new StaticUse.fieldGet(element));
     registry.registerStaticUse(new StaticUse.fieldSet(element));
     js.Name name = backend.namer.instanceFieldPropertyName(element);
@@ -2279,7 +2279,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
   }
 
   void visitStatic(HStatic node) {
-    Element element = node.element;
+    MemberLike element = node.element;
     assert(element.isFunction || element.isField);
     if (element.isFunction) {
       push(backend.emitter
@@ -2295,7 +2295,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
   }
 
   void visitLazyStatic(HLazyStatic node) {
-    Element element = node.element;
+    FieldLike element = node.element;
     registry.registerStaticUse(new StaticUse.staticInit(element));
     js.Expression lazyGetter =
         backend.emitter.isolateLazyInitializerAccess(element);