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bpo-39320: Handle unpacking of **values in compiler (GH-18141)

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* Add DICT_UPDATE and DICT_MERGE bytecodes. Use them for ** unpacking.

* Remove BUILD_MAP_UNPACK and BUILD_MAP_UNPACK_WITH_CALL, as they are now unused.

* Update magic number for ** unpacking opcodes.

* Update dis.rst to incorporate new bytecodes.

* Add blurb entry.
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Mark Shannon 2020-01-27 09:57:45 +00:00 • committed by GitHub
parent 72b1004657
commit 8a4cd700a7
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10 changed files with 3680 additions and 3672 deletions
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Lib/importlib/_bootstrap_external.py
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@ -276,6 +276,7 @@ _code_type = type(_write_atomic.__code__)
# Python 3.9a0 3422 (remove BEGIN_FINALLY, END_FINALLY, CALL_FINALLY, POP_FINALLY bytecodes #33387)
# Python 3.9a2 3423 (add IS_OP, CONTAINS_OP and JUMP_IF_NOT_EXC_MATCH bytecodes #39156)
# Python 3.9a2 3424 (simplify bytecodes for *value unpacking)
# Python 3.9a2 3425 (simplify bytecodes for **value unpacking)
#
# MAGIC must change whenever the bytecode emitted by the compiler may no
@ -285,7 +286,7 @@ _code_type = type(_write_atomic.__code__)
# Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
# in PC/launcher.c must also be updated.
MAGIC_NUMBER = (3424).to_bytes(2, 'little') + b'\r\n'
MAGIC_NUMBER = (3425).to_bytes(2, 'little') + b'\r\n'
_RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little') # For import.c
_PYCACHE = '__pycache__'