diff options
Diffstat (limited to 'include/qemu/compiler.h')
| -rw-r--r-- | include/qemu/compiler.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/qemu/compiler.h b/include/qemu/compiler.h index 09fc44cca4..7b93c73340 100644 --- a/include/qemu/compiler.h +++ b/include/qemu/compiler.h @@ -170,6 +170,17 @@ # define QEMU_NONSTRING #endif +/* + * Forced inlining may be desired to encourage constant propagation + * of function parameters. However, it can also make debugging harder, + * so disable it for a non-optimizing build. + */ +#if defined(__OPTIMIZE__) +#define QEMU_ALWAYS_INLINE __attribute__((always_inline)) +#else +#define QEMU_ALWAYS_INLINE +#endif + /* Implement C11 _Generic via GCC builtins. Example: * * QEMU_GENERIC(x, (float, sinf), (long double, sinl), sin) (x) @@ -210,4 +221,19 @@ #define QEMU_GENERIC9(x, a0, ...) QEMU_GENERIC_IF(x, a0, QEMU_GENERIC8(x, __VA_ARGS__)) #define QEMU_GENERIC10(x, a0, ...) QEMU_GENERIC_IF(x, a0, QEMU_GENERIC9(x, __VA_ARGS__)) +/** + * qemu_build_not_reached() + * + * The compiler, during optimization, is expected to prove that a call + * to this function cannot be reached and remove it. If the compiler + * supports QEMU_ERROR, this will be reported at compile time; otherwise + * this will be reported at link time due to the missing symbol. + */ +#ifdef __OPTIMIZE__ +extern void QEMU_NORETURN QEMU_ERROR("code path is reachable") + qemu_build_not_reached(void); +#else +#define qemu_build_not_reached() g_assert_not_reached() +#endif + #endif /* COMPILER_H */ |