Handle local get through semantic visitor methods.

pkg/compiler/lib/src/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;
 
 class SsaFunctionCompiler implements FunctionCompiler {
   SsaCodeGeneratorTask generator;
   SsaBuilderTask builder;
   SsaOptimizerTask optimizer;
@@ skipping 3284 matching lines @@
         generateThrowNoSuchMethod(
             send,
             noSuchMethodTargetSymbolString(element, 'get'),
             argumentNodes: const Link<ast.Node>());
       } else {
         // TODO(ahe): Do something like the above, that is, emit a runtime
         // error.
         stack.add(graph.addConstantNull(compiler));
       }
     } else {
-      LocalElement local = element;
-      stack.add(localsHandler.readLocal(local));
+      if (send.asSendSet() == null) {
+        internalError(send, "Unhandled local: $element");
+      }
+      // TODO(johnniwinther): Remove this when [generateGetter] is no longer
+      // called from [visitSendSet] (for compound assignments).
+      handleLocalGet(element);
     }
   }
 
+  /// Read a local variable, function or parameter.
+  void handleLocalGet(LocalElement local) {
+    stack.add(localsHandler.readLocal(local));
+  }
+
+  @override
+  void visitLocalVariableGet(ast.Send node, LocalVariableElement variable, _) {
+    handleLocalGet(variable);
+  }
+
+  @override
+  void visitParameterGet(ast.Send node, ParameterElement parameter, _) {
+    handleLocalGet(parameter);
+  }
+
+  @override
+  void visitLocalFunctionGet(ast.Send node, LocalFunctionElement function, _) {
+    handleLocalGet(function);
+  }
+
   void generateInstanceSetterWithCompiledReceiver(ast.Send send,
                                                   HInstruction receiver,
                                                   HInstruction value,
                                                   {Selector selector,
                                                    ast.Node location}) {
     assert(send == null || Elements.isInstanceSend(send, elements));
     if (selector == null) {
       assert(send != null);
       selector = elements.getSelector(send);
     }
@@ skipping 3634 matching lines @@
     if (unaliased is TypedefType) throw 'unable to unalias $type';
     unaliased.accept(this, builder);
   }
 
   void visitDynamicType(DynamicType type, SsaBuilder builder) {
     JavaScriptBackend backend = builder.compiler.backend;
     ClassElement cls = backend.findHelper('DynamicRuntimeType');
     builder.push(new HDynamicType(type, new TypeMask.exact(cls, classWorld)));
   }
 }