Use LLVM args to handle -malign-double option

include/clang/Basic/TargetInfo.h

 //===--- TargetInfo.h - Expose information about the target -----*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 760 matching lines @@
   /// \return  False on error.
   virtual bool handleTargetFeatures(std::vector<std::string> &Features,
                                     DiagnosticsEngine &Diags) {
     return true;
   }
 
   /// \brief Determine whether the given target has the given feature.
   virtual bool hasFeature(StringRef Feature) const {
     return false;
   }
+
+  // @LOCALMOD-START
+  /// Handle arguments passed to LLVM's option processing.
+  ///
+  /// \return False on error.
+  virtual bool handleLLVMArgs(std::vector<std::string> &Args) {
+    return true;
+  }
+  // @LOCALMOD-END
   
   // \brief Returns maximal number of args passed in registers.
   unsigned getRegParmMax() const {
     assert(RegParmMax < 7 && "RegParmMax value is larger than AST can handle");
     return RegParmMax;
   }
 
   /// \brief Whether the target supports thread-local storage.
   bool isTLSSupported() const {
     return TLSSupported;
@@ skipping 93 matching lines @@
     Addl = nullptr;
     NumAddl = 0;
   }
   virtual bool validateAsmConstraint(const char *&Name,
                                      TargetInfo::ConstraintInfo &info) const= 0;
 };
 
 }  // end namespace clang
 
 #endif