Fix HTypeConversion.checkedInput

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 '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/names.dart';
 import '../common/tasks.dart' show CompilerTask;
@@ skipping 290 matching lines @@
       localsHandler.updateLocal(parameter, argument);
     });
 
     // TODO(het): set the locals handler state as if we were inlining the
     // constructor.
     _buildInitializers(constructor, fieldValues);
   }
 
   HTypeConversion buildFunctionTypeConversion(
       HInstruction original, DartType type, int kind) {
-    String name =
-        kind == HTypeConversion.CAST_TYPE_CHECK ? '_asCheck' : '_assertCheck';
-
-    List<HInstruction> arguments = <HInstruction>[
-      buildFunctionType(type),
-      original
-    ];
-    _pushDynamicInvocation(null, null, arguments,
-        selector: new Selector.call(
-            new Name(name, astAdapter.jsHelperLibrary), CallStructure.ONE_ARG));
-
-    return new HTypeConversion(type, kind, original.instructionType, pop());
+    HInstruction reifiedType = buildFunctionType(type);
+    return new HTypeConversion.viaMethodOnType(
+        type, kind, original.instructionType, reifiedType, original);
   }
 
   /// Builds a SSA graph for [procedure].
   void buildProcedure(ir.Procedure procedure) {
     openFunction();
     procedure.function.body.accept(this);
     closeFunction();
   }
 
   void openFunction() {
@@ skipping 692 matching lines @@
     push(new HNot(popBoolified(), backend.boolType));
   }
 
   @override
   void visitStringConcatenation(ir.StringConcatenation stringConcat) {
     KernelStringBuilder stringBuilder = new KernelStringBuilder(this);
     stringConcat.accept(stringBuilder);
     stack.add(stringBuilder.result);
   }
 }