Add ability to test parsing of bitcode records in Subzero.

src/llvm2ice.cpp

 //===- subzero/src/llvm2ice.cpp - Driver for testing ----------------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines a driver that uses LLVM capabilities to parse a
@@ skipping 149 matching lines @@
 
 // Note: While this flag isn't used in the minimal build, we keep this
 // flag so that tests can set this command-line flag without concern
 // to the type of build. We double check that this flag at runtime
 // to make sure the consistency is maintained.
 static cl::opt<bool>
     BuildOnRead("build-on-read",
                 cl::desc("Build ICE instructions when reading bitcode"),
                 cl::init(true));
 
+static cl::opt<bool> AllowErrorRecovery(
+    "allow-pnacl-reader-error-recovery",
+    cl::desc("Allow error recovery when reading PNaCl bitcode."),
+    cl::init(false));
 
 static cl::opt<bool>
 LLVMVerboseErrors(
     "verbose-llvm-parse-errors",
     cl::desc("Print out more descriptive PNaCl bitcode parse errors when "
              "building LLVM IR first"),
     cl::init(false));
 
 static cl::opt<bool>
     UseIntegratedAssembler("integrated-as",
@@ skipping 110 matching lines @@
   Flags.DecorateAsm = DecorateAsm;
   Flags.DumpStats = DumpStats;
   Flags.AllowUninitializedGlobals = AllowUninitializedGlobals;
   Flags.TimeEachFunction = TimeEachFunction;
   Flags.DefaultGlobalPrefix = DefaultGlobalPrefix;
   Flags.DefaultFunctionPrefix = DefaultFunctionPrefix;
   Flags.TimingFocusOn = TimingFocusOn;
   Flags.VerboseFocusOn = VerboseFocusOn;
   Flags.TranslateOnly = TranslateOnly;
   Flags.DisableIRGeneration = DisableIRGeneration;
+  Flags.AllowErrorRecovery = AllowErrorRecovery;
 
   // Force -build-on-read=0 for .ll files.
   const std::string LLSuffix = ".ll";
   if (IRFilename.length() >= LLSuffix.length() &&
       IRFilename.compare(IRFilename.length() - LLSuffix.length(),
                          LLSuffix.length(), LLSuffix) == 0)
     BuildOnRead = false;
 
   // With the ELF writer, use a raw_fd_ostream to allow seeking.
   // Also don't buffer, otherwise it gets pretty slow.
@@ skipping 67 matching lines @@
   if (SubzeroTimingEnabled)
     Ctx.dumpTimers();
   if (TimeEachFunction) {
     const bool DumpCumulative = false;
     Ctx.dumpTimers(Ice::GlobalContext::TSK_Funcs, DumpCumulative);
   }
   const bool FinalStats = true;
   Ctx.dumpStats("_FINAL_", FinalStats);
   return GetReturnValue(ErrorStatus);
 }