Use LLVM args to handle -malign-double option

lib/Frontend/CompilerInvocation.cpp

 //===--- CompilerInvocation.cpp -------------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "clang/Frontend/CompilerInvocation.h"
@@ skipping 1808 matching lines @@
 }
 
 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
   using namespace options;
   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
   Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
   Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
+  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm); // @LOCALMOD
 
   // Use the default target triple if unspecified.
   if (Opts.Triple.empty())
     Opts.Triple = llvm::sys::getDefaultTargetTriple();
 }
 
 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
                                         const char *const *ArgBegin,
                                         const char *const *ArgEnd,
                                         DiagnosticsEngine &Diags) {
@@ skipping 253 matching lines @@
         vfs::getVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr);
     if (!FS.get()) {
       Diags.Report(diag::err_invalid_vfs_overlay) << File;
       return IntrusiveRefCntPtr<vfs::FileSystem>();
     }
     Overlay->pushOverlay(FS);
   }
   return Overlay;
 }
 } // end namespace clang