Use elements/types in constants/values

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 3ede5f61b1893d4ed935d9a682b09200ee4adcfb..78a800fb26d7c292928957a81cf661ff1e6f9247 100644
--- a/pkg/compiler/lib/src/ssa/codegen.dart
+++ b/pkg/compiler/lib/src/ssa/codegen.dart
@@ -2070,7 +2070,8 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
       // available to 'upgrade' the native object.
       TypeConstantValue type = constant;
       if (type.representedType.isInterfaceType) {
-        registry.registerTypeConstant(type.representedType.element);
+        InterfaceType representedType = type.representedType;
+        registry.registerTypeConstant(representedType.element);
       }
     }
     js.Expression expression = backend.emitter.constantReference(constant);