[turbofan] Initial version of RedundancyElimination.

src/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 620 matching lines @@
         'compiler/operator.cc',
         'compiler/operator.h',
         'compiler/osr.cc',
         'compiler/osr.h',
         'compiler/pipeline.cc',
         'compiler/pipeline.h',
         'compiler/pipeline-statistics.cc',
         'compiler/pipeline-statistics.h',
         'compiler/raw-machine-assembler.cc',
         'compiler/raw-machine-assembler.h',
+        'compiler/redundancy-elimination.cc',
+        'compiler/redundancy-elimination.h',
         'compiler/register-allocator.cc',
         'compiler/register-allocator.h',
         'compiler/register-allocator-verifier.cc',
         'compiler/register-allocator-verifier.h',
         'compiler/representation-change.cc',
         'compiler/representation-change.h',
         'compiler/schedule.cc',
         'compiler/schedule.h',
         'compiler/scheduler.cc',
         'compiler/scheduler.h',
@@ skipping 1634 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }