[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
diff --git a/llvm/lib/Fuzzer/FuzzerDriver.cpp b/llvm/lib/Fuzzer/FuzzerDriver.cpp
index 8a8c12f..30cdb80 100644
--- a/llvm/lib/Fuzzer/FuzzerDriver.cpp
+++ b/llvm/lib/Fuzzer/FuzzerDriver.cpp
@@ -390,6 +390,9 @@
FuzzingOptions Options;
Options.Verbosity = Flags.verbosity;
Options.MaxLen = Flags.max_len;
+ Options.ExperimentalLenControl = Flags.experimental_len_control;
+ if (Flags.experimental_len_control && Flags.max_len == 64)
+ Options.MaxLen = 1 << 20;
Options.UnitTimeoutSec = Flags.timeout;
Options.ErrorExitCode = Flags.error_exitcode;
Options.TimeoutExitCode = Flags.timeout_exitcode;