mirror of
https://github.com/neovim/neovim.git
synced 2025-10-03 16:36:30 +00:00
CMake: Feature-detect __builtin_{add,sub}_overflow
This commit is contained in:
@@ -122,6 +122,7 @@
|
||||
#endif
|
||||
|
||||
/// @def STRICT_ADD
|
||||
/// @brief Adds (a + b) and stores result in `c`. Aborts on overflow.
|
||||
///
|
||||
/// Requires GCC 5+ and Clang 3.8+
|
||||
/// https://clang.llvm.org/docs/LanguageExtensions.html
|
||||
@@ -132,8 +133,7 @@
|
||||
///
|
||||
/// @param MAX Maximum value of the narrowest type of operand.
|
||||
/// Not used if compiler supports __builtin_add_overflow.
|
||||
#if (defined(__clang__) && __has_builtin(__builtin_add_overflow)) \
|
||||
|| (__GNUC__ >= 5)
|
||||
#if HAVE_BUILTIN_ADD_OVERFLOW
|
||||
# define STRICT_ADD(a, b, c, t) \
|
||||
do { if (__builtin_add_overflow(a, b, c)) { abort(); } } while (0)
|
||||
#else
|
||||
@@ -141,8 +141,9 @@
|
||||
do { *(c) = (t)(a + b); } while (0)
|
||||
#endif
|
||||
|
||||
#if (defined(__clang__) && __has_builtin(__builtin_sub_overflow)) \
|
||||
|| (__GNUC__ >= 5)
|
||||
/// @def STRICT_SUB
|
||||
/// @brief Subtracts (a - b) and stores result in `c`. Aborts on overflow.
|
||||
#if HAVE_BUILTIN_ADD_OVERFLOW
|
||||
# define STRICT_SUB(a, b, c, t) \
|
||||
do { if (__builtin_sub_overflow(a, b, c)) { abort(); } } while (0)
|
||||
#else
|
||||
|
Reference in New Issue
Block a user