8000 gh-127545: Replace _Py_ALIGN_AS(V) by _Py_ALIGNED_DEF(N, T) by encukou · Pull Request #135209 · python/cpython · GitHub
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gh-127545: Replace _Py_ALIGN_AS(V) by _Py_ALIGNED_DEF(N, T) #135209

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Merged
merged 6 commits into from
Jun 11, 2025
Merged

gh-127545: Replace _Py_ALIGN_AS(V) by _Py_ALIGNED_DEF(N, T) #135209

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392f6c5
Specify minimum PyGC_Head and PyObject alignment to fix build failure
fthain Dec 3, 2024
e0156b0
Replace _Py_ALIGN_AS(V) by _Py_ALIGNED_DEF(N, T)
encukou Jun 6, 2025
512fe58
Actually make this a literal
encukou Jun 6, 2025
851cc3a
Move comment to the appropriate place
encukou Jun 7, 2025
80801db
Remove redundant comment
encukou Jun 7, 2025
6d7c805
Clarify units
encukou Jun 10, 2025
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8000
Clarify units 
Co-authored-by: Victor Stinner <vstinner@python.org>
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@encukou @vstinner
encukou and vstinner authored Jun 10, 2025
commit 6d7c805d769cf93318953d512f277479638bc0d1
2 changes: 1 addition & 1 deletion Include/object.h
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Expand Up @@ -103,7 +103,7 @@ whose size is determined when the object is allocated.

/* PyObjects are given a minimum alignment so that the least significant bits
* of an object pointer become available for other purposes.
* This must be an integer literal with the value (1 << _PyGC_PREV_SHIFT)
* This must be an integer literal with the value (1 << _PyGC_PREV_SHIFT), number of bytes.
*/
#define _PyObject_MIN_ALIGNMENT 4

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2 changes: 1 addition & 1 deletion Include/pymacro.h
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Expand Up @@ -26,7 +26,7 @@

// _Py_ALIGNED_DEF(N, T): Define a variable/member with increased alignment
//
// `N`: the desired minimum alignment, an integer literal
// `N`: the desired minimum alignment, an integer literal, number of bytes
// `T`: the type of the defined variable
// (or a type with at least the defined variable's alignment)
//
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