Subzero: Auto-set -build-on-read=0 for .ll input files.

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 266 matching lines @@
   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;
 
+  // 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;
+
   Ice::GlobalContext Ctx(Ls, Os, VMask, TargetArch, OptLevel, TestPrefix,
                          Flags);
 
   Ice::TimerMarker T(Ice::TimerStack::TT_szmain, &Ctx);
 
   int ErrorStatus = 0;
   if (BuildOnRead) {
     Ice::PNaClTranslator Translator(&Ctx, Flags);
     Translator.translate(IRFilename);
     ErrorStatus = Translator.getErrorStatus();
@@ skipping 20 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);
 }