diff options
Diffstat (limited to 'contrib/compiler-rt/lib/int_lib.h')
| -rw-r--r-- | contrib/compiler-rt/lib/int_lib.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/int_lib.h b/contrib/compiler-rt/lib/int_lib.h index a87426c..2328a1d 100644 --- a/contrib/compiler-rt/lib/int_lib.h +++ b/contrib/compiler-rt/lib/int_lib.h @@ -43,4 +43,24 @@ /* Include internal utility function declarations. */ #include "int_util.h" +/* + * Workaround for LLVM bug 11663. Prevent endless recursion in + * __c?zdi2(), where calls to __builtin_c?z() are expanded to + * __c?zdi2() instead of __c?zsi2(). + * + * Instead of placing this workaround in c?zdi2.c, put it in this + * global header to prevent other C files from making the detour + * through __c?zdi2() as well. + * + * This problem has only been observed on FreeBSD for sparc64 and + * mips64 with GCC 4.2.1. + */ +#if defined(__FreeBSD__) && (defined(__sparc64__) || \ + defined(__mips_n64) || defined(__mips_o64)) +si_int __clzsi2(si_int); +si_int __ctzsi2(si_int); +#define __builtin_clz __clzsi2 +#define __builtin_ctz __ctzsi2 +#endif + #endif /* INT_LIB_H */ |
