diff options
Diffstat (limited to 'compiler/optimizing/induction_var_range.cc')
| -rw-r--r-- | compiler/optimizing/induction_var_range.cc | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/compiler/optimizing/induction_var_range.cc b/compiler/optimizing/induction_var_range.cc index 2f5a22ec0e..1fa2724641 100644 --- a/compiler/optimizing/induction_var_range.cc +++ b/compiler/optimizing/induction_var_range.cc @@ -48,10 +48,11 @@ static bool IsSafeDiv(int32_t c1, int32_t c2) { /** Computes a * b for a,b > 0 (at least until first overflow happens). */ static int64_t SafeMul(int64_t a, int64_t b, /*out*/ bool* overflow) { - if (a > 0 && b > 0 && a > (std::numeric_limits<int64_t>::max() / b)) { + int64_t result; + if (__builtin_mul_overflow(a, b, &result)) { *overflow = true; } - return a * b; + return result; } /** Returns b^e for b,e > 0. Sets overflow if arithmetic wrap-around occurred. */ |