Support -malign-double option

lib/Driver/Tools.cpp

 //===--- Tools.cpp - Tools Implementations --------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "Tools.h"
@@ skipping 1694 matching lines @@
   if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
     StringRef Value = A->getValue();
     if (Value == "intel" || Value == "att") {
       CmdArgs.push_back("-mllvm");
       CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
     } else {
       getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
           << A->getOption().getName() << Value;
     }
   }
+
+  // @LOCALMOD-START
+  if (Args.getLastArg(options::OPT_malign_double)) {
+    CmdArgs.push_back("-mllvm");
+    CmdArgs.push_back("-malign-double");
+  }
+  // @LOCALMOD-END
 }
 
 static inline bool HasPICArg(const ArgList &Args) {
   return Args.hasArg(options::OPT_fPIC)
     || Args.hasArg(options::OPT_fpic);
 }
 
 static Arg *GetLastSmallDataThresholdArg(const ArgList &Args) {
   return Args.getLastArg(options::OPT_G,
                          options::OPT_G_EQ,
@@ skipping 7194 matching lines @@
       CmdArgs.push_back("-lmsvcrt");
       AddRunTimeLibs(TC, D, CmdArgs, Args);
     }
   }
 
   const std::string Linker = TC.GetProgramPath("ld");
   Exec = Args.MakeArgString(Linker);
 
   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs));
 }