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gh-93143: Avoid NULL check in LOAD_FAST based on analysis in the compiler (GH-93144)

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Dennis Sweeney 2022-05-31 16:32:30 -04:00 • committed by GitHub
parent 8a5e3c2ec6
commit f425f3bb27
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11 changed files with 371 additions and 52 deletions
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Lib/importlib/_bootstrap_external.py
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@ -406,6 +406,7 @@ _code_type = type(_write_atomic.__code__)
# Python 3.12a1 3500 (Remove PRECALL opcode)
# Python 3.12a1 3501 (YIELD_VALUE oparg == stack_depth)
# Python 3.12a1 3502 (LOAD_FAST_CHECK, no NULL-check in LOAD_FAST)
# Python 3.13 will start with 3550
@ -419,7 +420,7 @@ _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 = (3501).to_bytes(2, 'little') + b'\r\n'
MAGIC_NUMBER = (3502).to_bytes(2, 'little') + b'\r\n'
_RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little') # For import.c