Repository navigation
Wrong macro is used for free-threaded GC prefetch check for 32-bit MSVC #157906
Description
Bug report
Bug description
In Python/gc_free_threading.c, the MSVC architecture check contains a typo:
cpython/Python/gc_free_threading.c
Line 551 in 6b97452
_M_I86 should be _M_IX86, which is the macro defined by 32-bit MSVC. Because of this typo, 32-bit free-threaded builds select the no-op prefetch fallback.
This only affects performance; GC correctness is unchanged.
CPython versions tested on:
CPython main branch
Operating systems tested on:
No response
Activity
[-]a typo in free-threaded GC prefetch check for 32-bit MSVC[/-][+]Wrong macro is used for free-threaded GC prefetch check for 32-bit MSVC[/+]gh-157906: fix an incorrect architecture macro check in free-threaded…