Call the compile-time constant handler inside bodies.

frog/leg/ssa/builder.dart

Index: frog/leg/ssa/builder.dart
diff --git a/frog/leg/ssa/builder.dart b/frog/leg/ssa/builder.dart
index 8f7bea4a9353c2a824e0a355e7cfb12d8a85f8e9..40ddd744aa188065d3bb542a09b579f440a0baf2 100644
--- a/frog/leg/ssa/builder.dart
+++ b/frog/leg/ssa/builder.dart
@@ -1975,7 +1975,15 @@ class SsaBuilder implements Visitor {
     }
   }
 
-  visitNewExpression(NewExpression node) => visitSend(node.send);
+  visitNewExpression(NewExpression node) {
+    if (node.isConst()) {
+      ConstantHandler handler = compiler.constantHandler;
+      Constant constant = handler.compileNodeWithDefinitions(node, elements);
+      stack.add(graph.addConstant(constant));
+    } else {
+      visitSend(node.send);
+    }
+  }
 
   visitSendSet(SendSet node) {
     Operator op = node.assignmentOperator;