[libFuzzer] minor speed improvement
llvm-svn: 278856
diff --git a/llvm/lib/Fuzzer/FuzzerValueBitMap.h b/llvm/lib/Fuzzer/FuzzerValueBitMap.h
index 493afc5..65659f2 100644
--- a/llvm/lib/Fuzzer/FuzzerValueBitMap.h
+++ b/llvm/lib/Fuzzer/FuzzerValueBitMap.h
@@ -26,7 +26,7 @@
// Computed a hash function of Value and sets the corresponding bit.
void AddValue(uintptr_t Value) {
- uintptr_t Idx = Value % kMapSizeInBits;
+ uintptr_t Idx = Value < kMapSizeInBits ? Value : Value % kMapSizeInBits;
uintptr_t WordIdx = Idx / kBitsInWord;
uintptr_t BitIdx = Idx % kBitsInWord;
Map[WordIdx] |= 1UL << BitIdx;