Implement basic code generation for arrow functions

tools/generate-runtime-tests.py

 #!/usr/bin/env python
 # 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.
 
 import itertools
 import js2c
 import multiprocessing
 import optparse
 import os
@@ skipping 29 matching lines @@
 # functions they define are so trivial that it's unclear how much benefit
 # that would provide:
 # ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION
 # FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION
 # TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION
 
 # Counts of functions in each detection state. These are used to assert
 # that the parser doesn't bit-rot. Change the values as needed when you add,
 # remove or change runtime functions, but make sure we don't lose our ability
 # to parse them!
-EXPECTED_FUNCTION_COUNT = 417
-EXPECTED_FUZZABLE_COUNT = 332
+EXPECTED_FUNCTION_COUNT = 418
+EXPECTED_FUZZABLE_COUNT = 333
 EXPECTED_CCTEST_COUNT = 8
 EXPECTED_UNKNOWN_COUNT = 4
 EXPECTED_BUILTINS_COUNT = 809
 
 
 # Don't call these at all.
 BLACKLISTED = [
   "Abort",  # Kills the process.
   "AbortJS",  # Kills the process.
   "CompileForOnStackReplacement",  # Riddled with ASSERTs.
@@ skipping 187 matching lines @@
   "SetDebugEventListener": ["undefined", None, None],
   "SetFunctionBreakPoint": [None, 200, None, None],
   "StringBuilderConcat": ["[1, 2, 3]", 3, None, None],
   "StringBuilderJoin": ["['a', 'b']", 4, None, None],
   "StringMatch": [None, None, "['a', 'b']", None],
   "StringNormalize": [None, 2, None],
   "StringReplaceGlobalRegExpWithString": [None, None, None, "['a']", None],
   "TypedArrayInitialize": [None, 6, "new ArrayBuffer(8)", None, 4, None],
   "TypedArrayInitializeFromArrayLike": [None, 6, None, None, None],
   "TypedArraySetFastCases": [None, None, "0", None],
+  "FunctionIsArrow": ["() => null", None],
 }
 
 
 # Types of arguments that cannot be generated in a JavaScript testcase.
 NON_JS_TYPES = [
   "Code", "Context", "FixedArray", "FunctionTemplateInfo",
   "JSFunctionResultCache", "JSMessageObject", "Map", "ScopeInfo",
   "SharedFunctionInfo"]
 
 
@@ skipping 1130 matching lines @@
       for i in range(len(processes)):
         processes[i].join()
     except KeyboardInterrupt:
       stop_running.set()
       for i in range(len(processes)):
         processes[i].join()
     return 0
 
 if __name__ == "__main__":
   sys.exit(Main())