Initial implementation of a record-level bitcode fuzzer.

include/llvm/Bitcode/NaCl/NaClBitcodeMungeUtils.h

Index: include/llvm/Bitcode/NaCl/NaClBitcodeMungeUtils.h
diff --git a/include/llvm/Bitcode/NaCl/NaClBitcodeMungeUtils.h b/include/llvm/Bitcode/NaCl/NaClBitcodeMungeUtils.h
index c5cc31187be3765ea56081598cf9ccf83e8fb62b..6d3481a2df59fdbc9822eaef6a4858d389bf5793 100644
--- a/include/llvm/Bitcode/NaCl/NaClBitcodeMungeUtils.h
+++ b/include/llvm/Bitcode/NaCl/NaClBitcodeMungeUtils.h
@@ -238,7 +238,9 @@ public:
 
   bool write(SmallVectorImpl<char> &Buffer, bool AddHeader,
              const WriteFlags &Flags) const {
-    return writeMaybeRepair(Buffer, AddHeader, Flags).NumErrors == 0;
+    WriteResults Results = writeMaybeRepair(Buffer, AddHeader, Flags);
+    return Results.NumErrors == 0
+        || (Flags.getTryToRecover() && Results.NumErrors == Results.NumRepairs);
   }
 
   bool write(SmallVectorImpl<char> &Buffer, bool AddHeader) const {