unix-cpy: Remove unix-cpy. It's no longer needed.

unix-cpy was originally written to get semantic equivalent with CPython
without writing functional tests.  When writing the initial
implementation of uPy it was a long way between lexer and functional
tests, so the half-way test was to make sure that the bytecode was
correct.  The idea was that if the uPy bytecode matched CPython 1-1 then
uPy would be proper Python if the bytecodes acted correctly.  And having
matching bytecode meant that it was less likely to miss some deep
subtlety in the Python semantics that would require an architectural
change later on.

But that is all history and it no longer makes sense to retain the
ability to output CPython bytecode, because:

1. It outputs CPython 3.3 compatible bytecode.  CPython's bytecode
changes from version to version, and seems to have changed quite a bit
in 3.5.  There's no point in changing the bytecode output to match
CPython anymore.

2. uPy and CPy do different optimisations to the bytecode which makes it
harder to match.

3. The bytecode tests are not run.  They were never part of Travis and
are not run locally anymore.

4. The EMIT_CPYTHON option needs a lot of extra source code which adds
heaps of noise, especially in compile.c.

5. Now that there is an extensive test suite (which tests functionality)
there is no need to match the bytecode.  Some very subtle behaviour is
tested with the test suite and passing these tests is a much better
way to stay Python-language compliant, rather than trying to match
CPy bytecode.

1 files changed, 0 insertions, 81 deletions

diff --git a/tests/bytecode/pylib-tests/_compat_pickle.py b/tests/bytecode/pylib-tests/_compat_pickle.py
deleted file mode 100644
index 700c80cd5..000000000
--- a/tests/bytecode/pylib-tests/_compat_pickle.py
+++ /dev/null
@@ -1,81 +0,0 @@
-# This module is used to map the old Python 2 names to the new names used in
-# Python 3 for the pickle module.  This needed to make pickle streams
-# generated with Python 2 loadable by Python 3.
-
-# This is a copy of lib2to3.fixes.fix_imports.MAPPING.  We cannot import
-# lib2to3 and use the mapping defined there, because lib2to3 uses pickle.
-# Thus, this could cause the module to be imported recursively.
-IMPORT_MAPPING = {
-    'StringIO':  'io',
-    'cStringIO': 'io',
-    'cPickle': 'pickle',
-    '__builtin__' : 'builtins',
-    'copy_reg': 'copyreg',
-    'Queue': 'queue',
-    'SocketServer': 'socketserver',
-    'ConfigParser': 'configparser',
-    'repr': 'reprlib',
-    'FileDialog': 'tkinter.filedialog',
-    'tkFileDialog': 'tkinter.filedialog',
-    'SimpleDialog': 'tkinter.simpledialog',
-    'tkSimpleDialog': 'tkinter.simpledialog',
-    'tkColorChooser': 'tkinter.colorchooser',
-    'tkCommonDialog': 'tkinter.commondialog',
-    'Dialog': 'tkinter.dialog',
-    'Tkdnd': 'tkinter.dnd',
-    'tkFont': 'tkinter.font',
-    'tkMessageBox': 'tkinter.messagebox',
-    'ScrolledText': 'tkinter.scrolledtext',
-    'Tkconstants': 'tkinter.constants',
-    'Tix': 'tkinter.tix',
-    'ttk': 'tkinter.ttk',
-    'Tkinter': 'tkinter',
-    'markupbase': '_markupbase',
-    '_winreg': 'winreg',
-    'thread': '_thread',
-    'dummy_thread': '_dummy_thread',
-    'dbhash': 'dbm.bsd',
-    'dumbdbm': 'dbm.dumb',
-    'dbm': 'dbm.ndbm',
-    'gdbm': 'dbm.gnu',
-    'xmlrpclib': 'xmlrpc.client',
-    'DocXMLRPCServer': 'xmlrpc.server',
-    'SimpleXMLRPCServer': 'xmlrpc.server',
-    'httplib': 'http.client',
-    'htmlentitydefs' : 'html.entities',
-    'HTMLParser' : 'html.parser',
-    'Cookie': 'http.cookies',
-    'cookielib': 'http.cookiejar',
-    'BaseHTTPServer': 'http.server',
-    'SimpleHTTPServer': 'http.server',
-    'CGIHTTPServer': 'http.server',
-    'test.test_support': 'test.support',
-    'commands': 'subprocess',
-    'UserString' : 'collections',
-    'UserList' : 'collections',
-    'urlparse' : 'urllib.parse',
-    'robotparser' : 'urllib.robotparser',
-    'whichdb': 'dbm',
-    'anydbm': 'dbm'
-}
-
-
-# This contains rename rules that are easy to handle.  We ignore the more
-# complex stuff (e.g. mapping the names in the urllib and types modules).
-# These rules should be run before import names are fixed.
-NAME_MAPPING = {
-    ('__builtin__', 'xrange'):     ('builtins', 'range'),
-    ('__builtin__', 'reduce'):     ('functools', 'reduce'),
-    ('__builtin__', 'intern'):     ('sys', 'intern'),
-    ('__builtin__', 'unichr'):     ('builtins', 'chr'),
-    ('__builtin__', 'basestring'): ('builtins', 'str'),
-    ('__builtin__', 'long'):       ('builtins', 'int'),
-    ('itertools', 'izip'):         ('builtins', 'zip'),
-    ('itertools', 'imap'):         ('builtins', 'map'),
-    ('itertools', 'ifilter'):      ('builtins', 'filter'),
-    ('itertools', 'ifilterfalse'): ('itertools', 'filterfalse'),
-}
-
-# Same, but for 3.x to 2.x
-REVERSE_IMPORT_MAPPING = dict((v, k) for (k, v) in IMPORT_MAPPING.items())
-REVERSE_NAME_MAPPING = dict((v, k) for (k, v) in NAME_MAPPING.items())