diff options
Diffstat (limited to 'include/llvm/Support/Compiler.h')
| -rw-r--r-- | include/llvm/Support/Compiler.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h index 67f0fd7e0d..2d2a0b124a 100644 --- a/include/llvm/Support/Compiler.h +++ b/include/llvm/Support/Compiler.h @@ -126,4 +126,19 @@ decl #endif +// LLVM_BUILTIN_UNREACHABLE - On compilers which support it, expands +// to an expression which states that it is undefined behavior for the +// compiler to reach this point. +#if defined(__clang__) || (__GNUC__ > 4) \ + || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) +# define LLVM_BUILTIN_UNREACHABLE __builtin_unreachable() +#else +#ifdef __cplusplus +extern "C" LLVM_ATTRIBUTE_NORETURN void abort(); +#else +extern LLVM_ATTRIBUTE_NORETURN void abort(); +#endif +# define LLVM_BUILTIN_UNREACHABLE abort() +#endif + #endif |