Add ability to test parsing of bitcode records in Subzero.

unittest/BitcodeMunge.cpp

Index: unittest/BitcodeMunge.cpp
diff --git a/unittest/BitcodeMunge.cpp b/unittest/BitcodeMunge.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a6d283861db4d7e826b290fb474f22a43acb217e
--- /dev/null
+++ b/unittest/BitcodeMunge.cpp
@@ -0,0 +1,40 @@
+//===- BitcodeMunge.cpp - 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.
+//
+//===----------------------------------------------------------------------===//
+
+#include "BitcodeMunge.h"
+#include "IceCfg.h"
+#include "IceClFlags.h"
+#include "PNaClTranslator.h"
+#include "IceTypes.h"
+
+namespace IceTest {
+
+bool IceTest::SubzeroBitcodeMunger::runTest(
+    const char* TestName, const uint64_t Munges[], size_t MungeSize) {
+  const bool AddHeader = true;
+  setupTest(TestName, Munges, MungeSize, AddHeader);
+
+  Ice::ClFlags Flags;
+  Flags.AllowErrorRecovery = true;
+  Flags.GenerateUnitTestMessages = true;
+  Ice::GlobalContext Ctx(DumpStream, DumpStream, nullptr,
+                         Ice::IceV_Instructions, Ice::Target_X8632,
+                         Ice::Opt_m1, "", Flags);
+  Ice::PNaClTranslator Translator(&Ctx, Flags);
+  Translator.translateBuffer(TestName, MungedInput.get());
+
+  cleanupTest();
+  return Translator.getErrorStatus() == 0;
+}
+
+} // end of namespace IceTest