Add ability to test parsing of bitcode records in Subzero.

unittest/BitcodeMunge.h

Index: unittest/BitcodeMunge.h
diff --git a/unittest/BitcodeMunge.h b/unittest/BitcodeMunge.h
new file mode 100644
index 0000000000000000000000000000000000000000..ae46ae08a0ff07181567b63c89d0cae8578b0d24
--- /dev/null
+++ b/unittest/BitcodeMunge.h
@@ -0,0 +1,47 @@
+//===- BitcodeMunge.h - Subzero Bitcode Munger ------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Test harness for testing malformed bitcode files in Subzero. Uses NaCl's
+// bitcode munger to do this.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUBZERO_UNITTEST_BITCODEMUNGE_H
+#define SUBZERO_UNITTEST_BITCODEMUNGE_H
+
+#include "llvm/Bitcode/NaCl/NaClBitcodeMunge.h"
+
+namespace IceTest {
+
+// Class to run tests on Subzero's bitcode parser. Runs a Subzero
+// translation, using (possibly) edited bitcode record values.  For
+// more details on how to represent the input arrays, see
+// NaClBitcodeMunge.h.
+class SubzeroBitcodeMunger : public llvm::NaClBitcodeMunger {
+public:
+  SubzeroBitcodeMunger(const uint64_t Records[], size_t RecordSize,
+                       uint64_t RecordTerminator)
+      : llvm::NaClBitcodeMunger(Records, RecordSize, RecordTerminator) {}
+
+  /// Runs PNaClTranslator to translate bitcode records (with defined
+  /// record Munges), and puts output into DumpResults. Returns true
+  /// if parse is successful.
+  bool runTest(const char* TestName, const uint64_t Munges[],
+               size_t MungeSize);
+
+  /// Same as above, but without any edits.
+  bool runTest(const char* TestName) {
+    uint64_t NoMunges[] = {0};
+    return runTest(TestName, NoMunges, 0);
+  }
+};
+
+} // end of namespace IceTest
+
+#endif // SUBZERO_UNITTEST_BITCODEMUNGE_H