[Turbofan] Add the concept of aliasing to RegisterConfiguration.

test/unittests/unittests.gyp

 # 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.
 
 # Please keep this file in sync with BUILD.gn.
 
 {
   'variables': {
     'v8_code': 1,
   },
@@ skipping 102 matching lines @@
         'libplatform/task-queue-unittest.cc',
         'libplatform/worker-thread-unittest.cc',
         'heap/bitmap-unittest.cc',
         'heap/gc-idle-time-handler-unittest.cc',
         'heap/gc-tracer-unittest.cc',
         'heap/memory-reducer-unittest.cc',
         'heap/heap-unittest.cc',
         'heap/scavenge-job-unittest.cc',
         'heap/slot-set-unittest.cc',
         'locked-queue-unittest.cc',
+        'register-configuration-unittest.cc',

[Michael Achenbach, 2016/06/27 07:57:23]

Always keep BUILD.gn in sync. Otherwise the test will stop running soon... will
upload a fix.

         'run-all-unittests.cc',
         'test-utils.h',
         'test-utils.cc',
         'wasm/asm-types-unittest.cc',
         'wasm/ast-decoder-unittest.cc',
         'wasm/control-transfer-unittest.cc',
         'wasm/decoder-unittest.cc',
         'wasm/encoder-unittest.cc',
         'wasm/leb-helper-unittest.cc',
         'wasm/loop-assignment-analysis-unittest.cc',
@@ skipping 90 matching lines @@
             '../../gypfiles/isolate.gypi',
           ],
           'sources': [
             'unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }