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| author | Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> | 2024-03-21 10:48:05 +0100 |
|---|---|---|
| committer | Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> | 2024-03-22 02:54:15 +0100 |
| commit | f4bac3ca173be9f219099c04e76d6d62c4d0e19e (patch) | |
| tree | 8ba8377414f0a65195cdd74f6d4f0bf2b9e9577c /src/corelib/global | |
| parent | b20da0ba2844b1ecbb7b128f3075f7285673b604 (diff) | |
QTypeInfo: add detection for Clang's __is_trivially_relocatable
Types marked with [[clang::trivial_abi]] are considered to be trivially
relocatable for Clang. This is ABI compatible, since in Qt 6 we can
change the value of QTypeInfo::IsRelocatable "after the fact" -- it
simply means that code that doesn't get recompiled is pessimized.
Change-Id: I32e52bfb212c7919b2ebcf7832ede4404358330f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/global')
| -rw-r--r-- | src/corelib/global/qtypeinfo.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/corelib/global/qtypeinfo.h b/src/corelib/global/qtypeinfo.h index 9b2119da1d..473854f230 100644 --- a/src/corelib/global/qtypeinfo.h +++ b/src/corelib/global/qtypeinfo.h @@ -23,7 +23,13 @@ class QDebug; namespace QtPrivate { template <typename T> -inline constexpr bool qIsRelocatable = std::is_trivially_copyable_v<T> && std::is_trivially_destructible_v<T>; +inline constexpr bool qIsRelocatable = (std::is_trivially_copyable_v<T> && std::is_trivially_destructible_v<T>) +#if defined(__has_builtin) +#if __has_builtin(__is_trivially_relocatable) + || __is_trivially_relocatable(T) +#endif +#endif + ; // Denotes types that are trivially default constructible, and for which // value-initialization can be achieved by filling their storage with 0 bits. |