[MIPS] Modify LongBranch expansion to work with sandboxing

lib/Target/Mips/MCTargetDesc/MipsBaseInfo.h

 //===-- MipsBaseInfo.h - Top level definitions for MIPS MC ------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file contains small standalone helper functions and enum definitions for
@@ skipping 72 matching lines @@
 
     /// MO_HIGHER/HIGHEST - Represents the highest or higher half word of a
     /// 64-bit symbol address.
     MO_HIGHER,
     MO_HIGHEST,
 
     /// MO_GOT_HI16/LO16, MO_CALL_HI16/LO16 - Relocations used for large GOTs.
     MO_GOT_HI16,
     MO_GOT_LO16,
     MO_CALL_HI16,
-    MO_CALL_LO16
+    MO_CALL_LO16,
+
+    // @LOCALMOD-START
+    /// MO_NACL_LONG_BRANCH_HI16/LO16 - Represents high/low parts of the
+    /// long branch target basic block offset.
+    MO_NACL_LONG_BRANCH_HI16,
+    MO_NACL_LONG_BRANCH_LO16
+    // @LOCALMOD-END
   };
 
   enum {
     //===------------------------------------------------------------------===//
     // Instruction encodings.  These are the standard/most common forms for
     // Mips instructions.
     //
 
     // Pseudo - This represents an instruction that is a pseudo instruction
     // or one that has not been implemented yet.  It is illegal to code generate
@@ skipping 40 matching lines @@
   }
 
   if (Kind != MCExpr::SymbolRef)
     return std::make_pair((const MCSymbolRefExpr*)0, (int64_t)0);
 
   return std::make_pair(cast<MCSymbolRefExpr>(Expr), 0);
 }
 }
 
 #endif