[libFuzzer] add InsertRepeatedBytes and EraseBytes.
New mutation: InsertRepeatedBytes.
Updated mutation: EraseByte => EraseBytes.
This helps https://github.com/google/sanitizers/issues/710
where libFuzzer was not able to find a known bug.
Now it finds it in minutes.
Hopefully, the change is general enough to help other targets.
llvm-svn: 278687
diff --git a/llvm/lib/Fuzzer/test/repeated-bytes.test b/llvm/lib/Fuzzer/test/repeated-bytes.test
new file mode 100644
index 0000000..edcba83
--- /dev/null
+++ b/llvm/lib/Fuzzer/test/repeated-bytes.test
@@ -0,0 +1,2 @@
+CHECK: BINGO
+RUN: LLVMFuzzer-RepeatedBytesTest -runs=10000 2>&1 | FileCheck %s