Merge CommonElements and BackendHelpers!

pkg/compiler/lib/src/ssa/builder_kernel.dart

 // Copyright (c) 2016, 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 'package:kernel/ast.dart' as ir;
 
 import '../closure.dart';
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/names.dart';
@@ skipping 566 matching lines @@
         new DartString.literal(prefixElement.deferredImport.uri.toString()),
         closedWorld);
     _pushStaticInvocation(astAdapter.checkDeferredIsLoaded,
         [prefixConstant, uriConstant], astAdapter.checkDeferredIsLoadedType);
   }
 
   @override
   void visitLoadLibrary(ir.LoadLibrary loadLibrary) {
     // TODO(efortuna): Source information!
     push(new HInvokeStatic(
-        backend.helpers.loadLibraryWrapper,
+        compiler.commonElements.loadLibraryWrapper,
         [
           graph.addConstantString(
               new DartString.literal(loadLibrary.import.name), closedWorld)
         ],
         commonMasks.nonNullType,
         targetCanThrow: false));
   }
 
   @override
   void visitBlock(ir.Block block) {
@@ skipping 1899 matching lines @@
           astAdapter.getNode(invocation), MessageKind.JS_PLACEHOLDER_CAPTURE);
     }
 
     TypeMask ssaType =
         astAdapter.typeFromNativeBehavior(nativeBehavior, closedWorld);
 
     SourceInformation sourceInformation = null;
     push(new HForeignCode(nativeBehavior.codeTemplate, ssaType, inputs,
         isStatement: !nativeBehavior.codeTemplate.isExpression,
         effects: nativeBehavior.sideEffects,
-        nativeBehavior: nativeBehavior)..sourceInformation = sourceInformation);
+        nativeBehavior: nativeBehavior)
+      ..sourceInformation = sourceInformation);
   }
 
   void handleJsStringConcat(ir.StaticInvocation invocation) {
     if (_unexpectedForeignArguments(invocation, 2, 2)) {
       // Result expected on stack.
       stack.add(graph.addConstantNull(closedWorld));
       return;
     }
     List<HInstruction> inputs = _visitPositionalArguments(invocation.arguments);
     push(new HStringConcat(inputs[0], inputs[1], commonMasks.stringType));
@@ skipping 83 matching lines @@
   void visitMethodInvocation(ir.MethodInvocation invocation) {
     // Handle `x == null` specially. When these come from null-aware operators,
     // there is no mapping in the astAdapter.
     if (_handleEqualsNull(invocation)) return;
     invocation.receiver.accept(this);
     HInstruction receiver = pop();
     Selector selector = astAdapter.getSelector(invocation);
     _pushDynamicInvocation(
         invocation,
         astAdapter.typeOfInvocation(invocation, closedWorld),
-        <HInstruction>[receiver]
-          ..addAll(
-              _visitArgumentsForDynamicTarget(selector, invocation.arguments)));
+        <HInstruction>[receiver]..addAll(
+            _visitArgumentsForDynamicTarget(selector, invocation.arguments)));
   }
 
   bool _handleEqualsNull(ir.MethodInvocation invocation) {
     if (invocation.name.name == '==') {
       ir.Arguments arguments = invocation.arguments;
       if (arguments.types.isEmpty &&
           arguments.positional.length == 1 &&
           arguments.named.isEmpty) {
         bool finish(ir.Expression comparand) {
           comparand.accept(this);
@@ skipping 602 matching lines @@
     enterBlock.setBlockFlow(
         new HTryBlockInformation(
             kernelBuilder.wrapStatementGraph(bodyGraph),
             exception,
             kernelBuilder.wrapStatementGraph(catchGraph),
             kernelBuilder.wrapStatementGraph(finallyGraph)),
         exitBlock);
     kernelBuilder.inTryStatement = previouslyInTryStatement;
   }
 }