A64: Fixes for the veneers emission.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 192 matching lines @@
       ASSERT(is_near_linked());
     } else {
       pos_ = pos + 1;
       ASSERT(is_linked());
     }
   }
 
   friend class Assembler;
   friend class Displacement;
   friend class RegExpMacroAssemblerIrregexp;
+
+#if V8_TARGET_ARCH_A64
+  // On A64, the Assembler keeps track of pointers to Labels to resolve branches
+  // to distant targets. Copying labels would confuse the Assembler.
+  DISALLOW_COPY_AND_ASSIGN(Label);  // NOLINT
+#endif
 };
 
 
 enum SaveFPRegsMode { kDontSaveFPRegs, kSaveFPRegs };
 
 
 // -----------------------------------------------------------------------------
 // Relocation information
 
 
@@ skipping 839 matching lines @@
 
  private:
   int32_t multiplier_;
   int32_t shift_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_