dart2js: Turn the CPS inlining cache into a general compilation cache.

pkg/compiler/lib/src/js_backend/codegen/task.dart

 // Copyright (c) 2014, 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.
 
 /// Generate code using the cps-based IR pipeline.
 library code_generator_task;
 
 import 'glue.dart';
 import 'codegen.dart';
 import 'unsugar.dart';
@@ skipping 123 matching lines @@
   void applyCpsPass(cps_opt.Pass pass, cps.FunctionDefinition cpsFunction) {
     cpsOptimizationTask.measureSubtask(pass.passName, () {
       pass.rewrite(cpsFunction);
     });
     traceGraph(pass.passName, cpsFunction);
     dumpTypedIr(pass.passName, cpsFunction);
     assert(checkCpsIntegrity(cpsFunction, pass.passName));
   }
 
   cps.FunctionDefinition compileToCpsIr(AstElement element) {
-    cps.FunctionDefinition cpsFunction =
-        cpsBuilderTask.buildNode(element, typeSystem);
+    cps.FunctionDefinition cpsFunction = inliner.cache.getUnoptimized(element);
+    if (cpsFunction != null) return cpsFunction;
+
+    cpsFunction = cpsBuilderTask.buildNode(element, typeSystem);
     if (cpsFunction == null) {
       if (cpsBuilderTask.bailoutMessage == null) {
         giveUp('unable to build cps definition of $element');
       } else {
         giveUp(cpsBuilderTask.bailoutMessage);
       }
     }
     ParentVisitor.setParents(cpsFunction);
     traceGraph('IR Builder', cpsFunction);
     dumpTypedIr('IR Builder', cpsFunction);
     // Eliminating redundant phis before the unsugaring pass will make it
     // insert fewer getInterceptor calls.
     applyCpsPass(new RedundantPhiEliminator(), cpsFunction);
     applyCpsPass(new UnsugarVisitor(glue), cpsFunction);
+    applyCpsPass(new RedundantJoinEliminator(), cpsFunction);
+    applyCpsPass(new RedundantPhiEliminator(), cpsFunction);
+    applyCpsPass(new InsertRefinements(typeSystem), cpsFunction);
+
+    inliner.cache.putUnoptimized(element, cpsFunction);
     return cpsFunction;
   }
 
   static const Pattern PRINT_TYPED_IR_FILTER = null;
 
   String formatTypeMask(TypeMask type) {
     if (type is UnionTypeMask) {
       return '[${type.disjointMasks.map(formatTypeMask).join(', ')}]';
     } else if (type is FlatTypeMask) {
       if (type.isEmpty) {
@@ skipping 31 matching lines @@
       if (cpsIntegrityChecker == null) {
         cpsIntegrityChecker = new CheckCpsIntegrity();
       }
       cpsIntegrityChecker.check(node, previousPass);
     });
     return true; // So this can be used from assert().
   }
 
   void optimizeCpsBeforeInlining(cps.FunctionDefinition cpsFunction) {
     cpsOptimizationTask.measure(() {
-      applyCpsPass(new RedundantJoinEliminator(), cpsFunction);
-      applyCpsPass(new RedundantPhiEliminator(), cpsFunction);
-      applyCpsPass(new InsertRefinements(typeSystem), cpsFunction);
       applyCpsPass(new TypePropagator(this), cpsFunction);
       applyCpsPass(new RedundantJoinEliminator(), cpsFunction);
       applyCpsPass(new ShrinkingReducer(), cpsFunction);
     });
   }
 
   void optimizeCpsAfterInlining(cps.FunctionDefinition cpsFunction) {
     cpsOptimizationTask.measure(() {
       applyCpsPass(new RedundantJoinEliminator(), cpsFunction);
       applyCpsPass(new ShrinkingReducer(), cpsFunction);
@@ skipping 78 matching lines @@
         treeOptimizationTask]
       ..addAll(fallbackCompiler.tasks);
   }
 
   js.Node attachPosition(js.Node node, AstElement element) {
     return node.withSourceInformation(
         sourceInformationFactory.createBuilderForContext(element)
             .buildDeclaration(element));
   }
 }