[libFuzzer] add an experimental flag -experimental_len_control=1 that sets max_len to 1M and tries to increases the actual max sizes of mutations very gradually. Also remove a bit of dead code

llvm-svn: 289998

1 files changed, 0 insertions, 7 deletions

diff --git a/llvm/lib/Fuzzer/FuzzerMutate.cpp b/llvm/lib/Fuzzer/FuzzerMutate.cpp
index 80b7a5f961f..2b130cc291e 100644
--- a/llvm/lib/Fuzzer/FuzzerMutate.cpp
+++ b/llvm/lib/Fuzzer/FuzzerMutate.cpp
@@ -485,13 +485,6 @@ size_t MutationDispatcher::MutateImpl(uint8_t *Data, size_t Size,
                                       size_t MaxSize,
                                       const std::vector<Mutator> &Mutators) {
   assert(MaxSize > 0);
-  if (Size == 0) {
-    for (size_t i = 0; i < MaxSize; i++)
-      Data[i] = RandCh(Rand);
-    if (Options.OnlyASCII)
-      ToASCII(Data, MaxSize);
-    return MaxSize;
-  }
   assert(Size > 0);
   // Some mutations may fail (e.g. can't insert more bytes if Size == MaxSize),
   // in which case they will return 0.