Implement lowering of JSLoadContext to machine operators.

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/code-generator.h"
 #include "src/compiler/graph-replay.h"
@@ skipping 159 matching lines @@
     }
   }
 
   {
     // Lower any remaining generic JSOperators.
     PhaseStats lowering_stats(info(), PhaseStats::CREATE_GRAPH,
                               "generic lowering");
     MachineOperatorBuilder machine(zone());
     JSGenericLowering lowering(info(), &jsgraph, &machine, &source_positions);
     lowering.LowerAllNodes();
+
+    VerifyAndPrintGraph(&graph, "Lowered generic");
   }
 
   // Compute a schedule.
   Schedule* schedule = ComputeSchedule(&graph);
   TraceSchedule(schedule);
 
   Handle<Code> code = Handle<Code>::null();
   if (SupportedTarget()) {
     {
       // Generate optimized code.
@@ skipping 91 matching lines @@
   }
 
   // Generate native sequence.
   CodeGenerator generator(&sequence);
   return generator.GenerateCode();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8