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bpo-43693: Eliminate unused "fast locals". #26587

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Merged
ericsnowcurrently merged 10 commits into from
Jun 15, 2021
Merged

bpo-43693: Eliminate unused "fast locals". #26587

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d63f73e
Merge cell locals with var locals for args.
ericsnowcurrently May 10, 2021
db2fd06
Eliminate co_cell2arg.
ericsnowcurrently May 10, 2021
6cae5e0
Add a NEWS entry.
ericsnowcurrently Jun 7, 2021
b5ef8e1
Bump the .pyc magic number.
ericsnowcurrently Jun 9, 2021
0e1cbc4
Drop an expensive check from super_init_without_args().
ericsnowcurrently Jun 15, 2021
2ec5ae4
Do not export _PyFrame_OpAlreadyRan().
ericsnowcurrently Jun 15, 2021
4b086e9
Check only the free vars in super_init_without_args().
ericsnowcurrently Jun 15, 2021
09c3cdd
Simplify a comment.
ericsnowcurrently Jun 15, 2021
8693744
Sort the MAKE_CELL ops by oparg.
ericsnowcurrently Jun 15, 2021
bdb12a7
Add a light-weight check to super_init_without_args().
ericsnowcurrently Jun 15, 2021
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Bump the .pyc magic number.
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@ericsnowcurrently
ericsnowcurrently committed Jun 14, 2021
commit b5ef8e18c9e8018ab6bd189db7d82250b687ae40
3 changes: 2 additions & 1 deletion Lib/importlib/_bootstrap_external.py
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Original file line number Diff line number Diff line change
Expand Up @@ -358,6 +358,7 @@ def _write_atomic(path, data, mode=0o666):
# Python 3.11a1 3453 (add co_fastlocalnames and co_fastlocalkinds)
# Python 3.11a1 3454 (compute cell offsets relative to locals bpo-43693)
# Python 3.11a1 3455 (add MAKE_CELL bpo-43693)
# Python 3.11a1 3456 (interleave cell args bpo-43693)

#
# MAGIC must change whenever the bytecode emitted by the compiler may no
Expand All @@ -367,7 +368,7 @@ def _write_atomic(path, data, mode=0o666):
# Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
# in PC/launcher.c must also be updated.

MAGIC_NUMBER = (3455).to_bytes(2, 'little') + b'\r\n'
MAGIC_NUMBER = (3456).to_bytes(2, 'little') + b'\r\n'
_RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little') # For import.c

_PYCACHE = '__pycache__'
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