Stub implementation of patch invariants for the patch refactoring.

lib/compiler/implementation/ssa/codegen.dart

Index: lib/compiler/implementation/ssa/codegen.dart
diff --git a/lib/compiler/implementation/ssa/codegen.dart b/lib/compiler/implementation/ssa/codegen.dart
index 087d657c4b2aaf64440db5358589fa36574014c3..3203e8565e16e14b39cf80240b9e31f0309c9159 100644
--- a/lib/compiler/implementation/ssa/codegen.dart
+++ b/lib/compiler/implementation/ssa/codegen.dart
@@ -16,7 +16,8 @@ class SsaCodeGeneratorTask extends CompilerTask {
   js.Fun buildJavaScriptFunction(FunctionElement element,
                                  List<js.Parameter> parameters,
                                  js.Block body) {
-    FunctionExpression expression = element.cachedNode;
+    FunctionExpression expression =
+        element.implementation.parseNode(backend.compiler);
     js.Fun result = new js.Fun(parameters, body);
     // TODO(johnniwinther): remove the 'element.patch' hack.
     Element sourceElement = element.patch == null ? element : element.patch;

[ngeoffray, 2012/09/20 11:38:37]

Can you remove this todo and use element.implementation instead?

[Johnni Winther, 2012/09/21 09:18:25]

In a later CL.

@@ -73,7 +74,7 @@ class SsaCodeGeneratorTask extends CompilerTask {
       });
       compiler.tracer.traceGraph("codegen", graph);
       Map<Element, String> parameterNames = getParameterNames(work);
-      parameterNames.forEach((element, name) {
+      work.element.computeSignature(compiler).forEachParameter((element) {

[ngeoffray, 2012/09/20 11:38:37]

Please use parameterNames and fetch the declaration from the elements. Otherwise
the fact that you want declarations is too hidden behind the scenes.

[Johnni Winther, 2012/09/21 09:18:25]

I can't. There is no link between a parameter element of the implementation and
the corresponding parameter element of the declaration. I didn't want to make
[VariableElement] patchable.

Added a comment instead.

         compiler.enqueuer.codegen.addToWorkList(element);
       });
       List<js.Parameter> parameters = <js.Parameter>[];
@@ -156,7 +157,7 @@ class SsaCodeGeneratorTask extends CompilerTask {
 
   Map<Element, String> getParameterNames(WorkItem work) {
     Map<Element, String> parameterNames = new LinkedHashMap<Element, String>();
-    FunctionElement function = work.element;
+    FunctionElement function = work.element.implementation;
 
     // The dom/html libraries have inline JS code that reference
     // parameter names directly. Long-term such code will be rejected.