[es6] Stage tail call elimination.

test/test262/test262.status

 # Copyright 2011 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 167 matching lines @@
   'language/statements/class/subclass/builtin-objects/NativeError/TypeError-message': [FAIL],
   'language/statements/class/subclass/builtin-objects/NativeError/URIError-message': [FAIL],
   'language/statements/class/subclass/builtin-objects/Error/message-property-assignment': [FAIL],
 
   # https://code.google.com/p/chromium/issues/detail?id=581577
   'built-ins/RegExp/prototype/source/15.10.7.1-1': [FAIL],
   'built-ins/RegExp/prototype/global/15.10.7.2-1': [FAIL],
   'built-ins/RegExp/prototype/ignoreCase/15.10.7.3-1': [FAIL],
   'built-ins/RegExp/prototype/multiline/15.10.7.4-1': [FAIL],
 
-  # https://bugs.chromium.org/p/v8/issues/detail?id=4698
-  'language/expressions/call/tco-call-args': [FAIL],
-  'language/expressions/call/tco-member-args': [FAIL],
-  'language/expressions/comma/tco-final': [FAIL],
-  'language/expressions/conditional/tco-cond': [FAIL],
-  'language/expressions/conditional/tco-pos': [FAIL],
-  'language/expressions/logical-and/tco-right': [FAIL],
-  'language/expressions/logical-or/tco-right': [FAIL],
-  'language/expressions/tagged-template/tco-call': [FAIL],
-  'language/expressions/tagged-template/tco-member': [FAIL],
-  'language/expressions/tco-pos': [FAIL],
-  'language/statements/block/tco-stmt': [FAIL],
-  'language/statements/block/tco-stmt-list': [FAIL],
-  'language/statements/do-while/tco-body': [FAIL],
-  'language/statements/for/tco-const-body': [FAIL],
-  'language/statements/for/tco-let-body': [FAIL],
-  'language/statements/for/tco-lhs-body': [FAIL],
-  'language/statements/for/tco-var-body': [FAIL],
-  'language/statements/if/tco-else-body': [FAIL],
-  'language/statements/if/tco-if-body': [FAIL],
-  'language/statements/labeled/tco': [FAIL],
-  'language/statements/return/tco': [FAIL],
-  'language/statements/switch/tco-case-body': [FAIL],
-  'language/statements/switch/tco-case-body-dflt': [FAIL],
-  'language/statements/switch/tco-dftl-body': [FAIL],
-  'language/statements/try/tco-catch': [FAIL],
-  'language/statements/try/tco-catch-finally': [FAIL],
-  'language/statements/try/tco-finally': [FAIL],
-  'language/statements/while/tco-body': [FAIL],
-
   # https://bugs.chromium.org/p/v8/issues/detail?id=4727
   'built-ins/TypedArrays/length-arg-is-undefined-throws': [FAIL],
   'built-ins/TypedArrays/length-arg-is-symbol-throws': [FAIL],
   'built-ins/TypedArrays/length-arg-is-float-throws-rangeerror': [FAIL],
   'built-ins/TypedArrays/length-arg-is-nan-throws-rangeerror': [FAIL],
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=4784
   'built-ins/TypedArrays/buffer-arg-defined-negative-length': [FAIL],
 
   ######################## NEEDS INVESTIGATION ###########################
@@ skipping 137 matching lines @@
   'built-ins/Promise/prototype/then/deferred-is-resolved-value': [SKIP],
 }],  # asan == True
 
 ['asan == True or msan == True or tsan == True', {
   # https://bugs.chromium.org/p/v8/issues/detail?id=4639
   # The failed allocation causes an asan/msan/tsan error
   'built-ins/ArrayBuffer/allocation-limit': [SKIP],
 }],  # asan == True or msan == True or tsan == True
 
 ]