Make codegen and optimizations depend more directly on data objects.

pkg/compiler/lib/src/ssa/codegen.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.
 
 import 'dart:math' as math;
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_system.dart';
@@ skipping 300 matching lines @@
    */
   push(js.Expression expression) {
     expressionStack.add(expression);
   }
 
   js.Expression pop() {
     return expressionStack.removeLast();
   }
 
   void preGenerateMethod(HGraph graph) {
-    new SsaInstructionSelection(compiler, closedWorld).visitGraph(graph);
+    new SsaInstructionSelection(closedWorld, backend.interceptorData)
+        .visitGraph(graph);
     new SsaTypeKnownRemover().visitGraph(graph);
-    new SsaTrustedCheckRemover(compiler).visitGraph(graph);
-    new SsaInstructionMerger(generateAtUseSite, compiler).visitGraph(graph);
+    new SsaTrustedCheckRemover(compiler.options).visitGraph(graph);
+    new SsaInstructionMerger(generateAtUseSite, backend).visitGraph(graph);
     new SsaConditionMerger(generateAtUseSite, controlFlowOperators)
         .visitGraph(graph);
-    SsaLiveIntervalBuilder intervalBuilder = new SsaLiveIntervalBuilder(
-        compiler, generateAtUseSite, controlFlowOperators);
+    SsaLiveIntervalBuilder intervalBuilder =
+        new SsaLiveIntervalBuilder(generateAtUseSite, controlFlowOperators);
     intervalBuilder.visitGraph(graph);
     SsaVariableAllocator allocator = new SsaVariableAllocator(
-        compiler,
+        backend.namer,
         intervalBuilder.liveInstructions,
         intervalBuilder.liveIntervals,
         generateAtUseSite);
     allocator.visitGraph(graph);
     variableNames = allocator.names;
     shouldGroupVarDeclarations = allocator.names.numberOfVariables > 1;
   }
 
   void handleDelayedVariableDeclarations(SourceInformation sourceInformation) {
     // If we have only one variable declaration and the first statement is an
@@ skipping 2638 matching lines @@
     return closedWorld.anyStrictSubclassOf(cls, (ClassEntity subclass) {
       return !backend.rtiSubstitutions.isTrivialSubstitution(subclass, cls);
     });
   }
 
   @override
   void visitRef(HRef node) {
     visit(node.value);
   }
 }