Before the r16-4349-g90dde804626f13 the required aligment of floating point,
and pointer specialization used __alignof__(_Vt) as required_aligment, and
mentioned commit changed them to alignof(_Vt). This values differs on i686
for double, as alignof(double) is 4, and __alignof__(double) is 8.
This patch restores the previous behavior.
PR libstdc++/122267
libstdc++-v3/ChangeLog:
* include/bits/atomic_base.h
(__atomic_ref_base<const _Tp>::_S_required_aligment): Use __alignof__
instead of alignof.
---
Tested 29_atomics/atomic_ref/* both with -m32 and without.
Testing all on x86_64-linux locally. OK for trunk when tests passes?
libstdc++-v3/include/bits/atomic_base.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/bits/atomic_base.h
b/libstdc++-v3/include/bits/atomic_base.h
index 0f3f6b1925d..7e4ad2b1272 100644
--- a/libstdc++-v3/include/bits/atomic_base.h
+++ b/libstdc++-v3/include/bits/atomic_base.h
@@ -1538,7 +1538,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_S_required_aligment()
{
if constexpr (is_floating_point_v<_Vt> || is_pointer_v<_Vt>)
- return alignof(_Vt);
+ return __alignof__(_Vt);
else if constexpr ((sizeof(_Vt) & (sizeof(_Vt) - 1)) || sizeof(_Vt) >
16)
return alignof(_Vt);
else
--
2.51.0
