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Suppress a bogus stringop-overflow warning

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This commit is contained in:
Victor Zverovich 2023-07-20 09:53:54 -07:00
parent dd5a9691f9
commit fb97cb2318
1 changed files with 4 additions and 2 deletions
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6
include/fmt/format.h
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@ -542,6 +542,8 @@ FMT_INLINE void assume(bool condition) {
(void)condition;
#if FMT_HAS_BUILTIN(__builtin_assume) && !FMT_ICC_VERSION
__builtin_assume(condition);
#elif FMT_GCC_VERSION
if (!condition) __builtin_unreachable();
#endif
}
@ -941,9 +943,9 @@ class basic_memory_buffer final : public detail::buffer<T> {
T* new_data =
std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
// Suppress a bogus -Wstringop-overflow in gcc 13.1 (#3481).
FMT_ASSERT(this->size() <= new_capacity, "");
detail::assume(this->size() <= new_capacity);
// The following code doesn't throw, so the raw pointer above doesn't leak.
std::uninitialized_copy(old_data, old_data + this->size(), new_data);
std::uninitialized_copy_n(old_data, this->size(), new_data);
this->set(new_data, new_capacity);
// deallocate must not throw according to the standard, but even if it does,
// the buffer already uses the new storage and will deallocate it in