Handle compile-time constness for conditionals and type literal calls.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of ssa;
 
 /**
  * A special element for the extra parameter taken by intercepted
  * methods. We need to override [Element.computeType] because our
  * optimizers may look at its declared type.
@@ skipping 3657 matching lines @@
   HConstant addConstantString(Node node, String string) {
     DartString dartString = new DartString.literal(string);
     Constant constant = constantSystem.createString(dartString, node);
     return graph.addConstant(constant, compiler);
   }
 
   visitTypeReferenceSend(Send node) {
     Element element = elements[node];
     if (element.isClass() || element.isTypedef()) {
       // TODO(karlklose): add type representation
-      stack.add(addConstant(node));
+      if (node.isCall) {
+        // The node itself is not a constant but we register the selector (the
+        // identifier that refers to the class/typedef) as a constant.
+        stack.add(addConstant(node.selector));
+      } else {
+        stack.add(addConstant(node));
+      }
     } else if (element.isTypeVariable()) {
       HInstruction value =
           addTypeVariableReference(element.computeType(compiler));
       pushInvokeStatic(node,
                        backend.getRuntimeTypeToString(),
                        [value],
                        backend.stringType);
       pushInvokeStatic(node,
                        backend.getCreateRuntimeType(),
                        [pop()]);
@@ skipping 1860 matching lines @@
           new HSubGraphBlockInformation(elseBranch.graph));
 
     HBasicBlock conditionStartBlock = conditionBranch.block;
     conditionStartBlock.setBlockFlow(info, joinBlock);
     SubGraph conditionGraph = conditionBranch.graph;
     HIf branch = conditionGraph.end.last;
     assert(branch is HIf);
     branch.blockInformation = conditionStartBlock.blockFlow;
   }
 }