diff options
| -rw-r--r-- | third_party/base/numerics/safe_math_impl.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/third_party/base/numerics/safe_math_impl.h b/third_party/base/numerics/safe_math_impl.h index 4bcc67188c..61f18d2b2a 100644 --- a/third_party/base/numerics/safe_math_impl.h +++ b/third_party/base/numerics/safe_math_impl.h @@ -44,7 +44,11 @@ struct UnsignedOrFloatForSize<Numeric, false, true> { }; // Probe for builtin math overflow support on Clang and version check on GCC. -#if defined(__has_builtin) +#if defined(EMSCRIPTEN) +// Emscripten Clang reports that it has the builtins, it may be lowered to an +// instruction that is unsupported in asm.js +#define USE_OVERFLOW_BUILTINS (0) +#elif defined(__has_builtin) #define USE_OVERFLOW_BUILTINS (__has_builtin(__builtin_add_overflow)) #elif defined(__GNUC__) #define USE_OVERFLOW_BUILTINS (__GNUC__ >= 5) |