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libstdc++: Disable false positive middle end warnings in std::shared_ptr [PR122197]

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Speculative devirtualization in GCC 16 causes some false positive
warnings for unreachable paths. Use diagnostic pragmas to suppress
those warnings until the regression is fixed.

libstdc++-v3/ChangeLog:

	PR tree-optimization/122197
	* include/bits/shared_ptr_base.h (~_Sp_counted_deleter): Use
	diagnostic pragam to disable -Wfree-nonheap-object false
	positive.
	(~_Sp_counted_ptr_inplace): Likewise for -Warray-bounds false
	positive.

Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com>
This commit is contained in:
Jonathan Wakely
2026-01-23 14:25:03 +00:00
committed by Jonathan Wakely
parent 975025de35
commit 74e0bb3faa
1 changed files with 7 additions and 0 deletions
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7
libstdc++-v3/include/bits/shared_ptr_base.h
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@@ -579,7 +579,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_Sp_counted_deleter(_Ptr __p, _Deleter __d, const _Alloc& __a) noexcept
: _M_impl(__p, std::move(__d), __a) { }
#pragma GCC diagnostic push // PR tree-optimization/122197
#pragma GCC diagnostic ignored "-Wfree-nonheap-object"
template<typename> class auto_ptr;
~_Sp_counted_deleter() noexcept { }
#pragma GCC diagnostic pop
virtual void
_M_dispose() noexcept
@@ -667,7 +671,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
std::forward<_Args>(__args)...); // might throw
}
#pragma GCC diagnostic push // PR tree-optimization/122197
#pragma GCC diagnostic ignored "-Warray-bounds"
~_Sp_counted_ptr_inplace() noexcept { }
#pragma GCC diagnostic pop
virtual void
_M_dispose() noexcept