Start supporting fixed length and immutable lists.

dart/frog/leg/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.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 1912 matching lines @@
   }
 
   visitLiteralList(LiteralList node) {
     List<HInstruction> inputs = <HInstruction>[];
     for (Link<Node> link = node.elements.nodes;
          !link.isEmpty();
          link = link.tail) {
       visit(link.head);
       inputs.add(pop());
     }
-    push(new HLiteralList(inputs));
+    push(new HLiteralList(inputs, node.isConst()));
   }
 
   visitConditional(Conditional node) {
     visit(node.condition);
     HBasicBlock conditionBlock = close(new HIf(popBoolified(), true));
     LocalsHandler savedLocals = new LocalsHandler.from(localsHandler);
 
     HBasicBlock thenBlock = addNewBlock();
     conditionBlock.addSuccessor(thenBlock);
     open(thenBlock);
@@ skipping 330 matching lines @@
   }
 
   visitCatchBlock(CatchBlock node) {
     visit(node.block);
   }
 
   visitTypedef(Typedef node) {
     compiler.unimplemented('SsaBuilder.visitTypedef', node: node);
   }
 }