Subzero: Emit ARM build-attributes in the file scope (as header).

src/IceCompiler.cpp

 //===- subzero/src/IceCompiler.cpp - Driver for bitcode translation -------===//
 //
 //                        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 for translating PNaCl bitcode into native code.
@@ skipping 84 matching lines @@
   const std::string LLSuffix = ".ll";
   const IceString &IRFilename = ExtraFlags.getIRFilename();
   bool BuildOnRead = ExtraFlags.getBuildOnRead();
   if (ALLOW_LLVM_IR_AS_INPUT && IRFilename.length() >= LLSuffix.length() &&
       IRFilename.compare(IRFilename.length() - LLSuffix.length(),
                          LLSuffix.length(), LLSuffix) == 0)
     BuildOnRead = false;
 
   TimerMarker T(Ice::TimerStack::TT_szmain, &Ctx);
 
-  if (Ctx.getFlags().getOutFileType() == FT_Elf) {
-    TimerMarker T1(Ice::TimerStack::TT_emit, &Ctx);
-    Ctx.getObjectWriter()->writeInitialELFHeader();
-  }
-
+  Ctx.emitFileHeader();
   Ctx.startWorkerThreads();
 
   std::unique_ptr<Translator> Translator;
   if (BuildOnRead) {
     std::unique_ptr<PNaClTranslator> PTranslator(new PNaClTranslator(&Ctx));
     std::unique_ptr<llvm::StreamingMemoryObject> MemObj(
         new llvm::StreamingMemoryObjectImpl(InputStream.release()));
     PTranslator->translate(IRFilename, std::move(MemObj));
     Translator.reset(PTranslator.release());
   } else if (ALLOW_LLVM_IR) {
@@ skipping 37 matching lines @@
     Ctx.dumpTimers();
   if (Ctx.getFlags().getTimeEachFunction()) {
     const bool DumpCumulative = false;
     Ctx.dumpTimers(GlobalContext::TSK_Funcs, DumpCumulative);
   }
   const bool FinalStats = true;
   Ctx.dumpStats("_FINAL_", FinalStats);
 }
 
 } // end of namespace Ice