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[libcxx] Use the unoptimized routines for volatile source types

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As reported in: D147741

Reviewers: philnik, var-const, ldionne, hans

Differential Revision: https://reviews.llvm.org/D152571
This commit is contained in:
AdityaK 2023-06-10 23:10:23 -07:00
parent 5217e7756c
commit 8100aa4c02
2 changed files with 10 additions and 1 deletions
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2
libcxx/include/__memory/uninitialized_algorithms.h
View File

@ -573,7 +573,7 @@ template <class _Alloc,
__enable_if_t<
// using _RawTypeIn because of the allocator<T const> extension
is_trivially_copy_constructible<_RawTypeIn>::value && is_trivially_copy_assignable<_RawTypeIn>::value &&
is_same<__remove_cv_t<_In>, __remove_cv_t<_Out> >::value &&
is_same<__remove_const_t<_In>, __remove_const_t<_Out> >::value &&
__allocator_has_trivial_copy_construct<_Alloc, _RawTypeIn>::value>* = nullptr>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Out*
__uninitialized_allocator_copy_impl(_Alloc&, _In* __first1, _In* __last1, _Out* __first2) {

9
libcxx/test/std/containers/sequences/vector/vector.cons/copy.pass.cpp
View File

@ -100,11 +100,20 @@ TEST_CONSTEXPR_CXX20 bool tests() {
return true;
}
void test_copy_from_volatile_src() {
volatile int src[] = {1, 2, 3};
std::vector<int> v(src, src + 3);
assert(v[0] == 1);
assert(v[1] == 2);
assert(v[2] == 3);
}
int main(int, char**)
{
tests();
#if TEST_STD_VER > 17
static_assert(tests());
#endif
test_copy_from_volatile_src();
return 0;
}