Use precomputed constant for determining if static is lazy-init

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

Index: pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
diff --git a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
index 07c515c3a0388e23df5a1effbff2cd586e67c69f..fd59cd5759fd407d84d403a5f1ee9a7e7fb1173f 100644
--- a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
+++ b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
@@ -92,6 +92,8 @@ class KernelAstAdapter {
 
   MethodElement getMethod(ir.Node node) => getElement(node).declaration;
 
+  FieldElement getField(ir.Node node) => getElement(node).declaration;
+
   ClassElement getClass(ir.Node node) => getElement(node).declaration;
 
   ast.Node getNode(ir.Node node) {
@@ -286,6 +288,15 @@ class KernelAstAdapter {
     return _backend.isInterceptedSelector(selector);
   }
 
+  // Is the member a lazy initialized static or top-level member?
+  bool isLazyStatic(ir.Member member) {
+    if (member is ir.Field) {
+      FieldElement field = _nodeToElement[member];
+      return field.constant == null;
+    }
+    return false;
+  }
+
   LibraryElement get jsHelperLibrary => _backend.helpers.jsHelperLibrary;
 
   JumpTarget getTargetDefinition(ir.Node node) =>