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[libFuzzer] don't do expensive memmem if the result will not be used

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258462 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany 2016-01-22 01:04:58 +00:00
parent 23d189b204
commit 75da488104
1 changed files with 2 additions and 0 deletions
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2
lib/Fuzzer/FuzzerTraceState.cpp
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@ -362,6 +362,7 @@ void TraceState::DFSanSwitchCallback(uint64_t PC, size_t ValSizeInBits,
int TraceState::TryToAddDesiredData(uint64_t PresentData, uint64_t DesiredData,
size_t DataSize) {
if (NumMutations >= kMaxMutations) return 0;
int Res = 0;
const uint8_t *Beg = *CurrentUnitData;
const uint8_t *End = Beg + *CurrentUnitSize;
@ -382,6 +383,7 @@ int TraceState::TryToAddDesiredData(uint64_t PresentData, uint64_t DesiredData,
int TraceState::TryToAddDesiredData(const uint8_t *PresentData,
const uint8_t *DesiredData,
size_t DataSize) {
if (NumMutations >= kMaxMutations) return 0;
int Res = 0;
const uint8_t *Beg = *CurrentUnitData;
const uint8_t *End = Beg + *CurrentUnitSize;