Cleanup and simplify TurboFan generic lowering.

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/pipeline.h"
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/compiler/ast-graph-builder.h"
 #include "src/compiler/change-lowering.h"
 #include "src/compiler/code-generator.h"
@@ skipping 264 matching lines @@
   }
 
   Handle<Code> code = Handle<Code>::null();
   if (SupportedTarget()) {
     {
       // Lower any remaining generic JSOperators.
       PhaseStats lowering_stats(info(), PhaseStats::CREATE_GRAPH,
                                 "generic lowering");
       SourcePositionTable::Scope pos(&source_positions,
                                      SourcePosition::Unknown());
-      JSGenericLowering lowering(info(), &jsgraph, &machine);
+      JSGenericLowering lowering(info(), &jsgraph);
       GraphReducer graph_reducer(&graph);
       graph_reducer.AddReducer(&lowering);
       graph_reducer.ReduceGraph();
 
       VerifyAndPrintGraph(&graph, "Lowered generic");
     }
 
     {
       // Compute a schedule.
       Schedule* schedule = ComputeSchedule(&graph);
@@ skipping 105 matching lines @@
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8