Remove the ARM jump elimination.

src/assembler-arm.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 724 matching lines @@
   // Relocation info records are also used during code generation as temporary
   // containers for constants and code target addresses until they are emitted
   // to the constant pool. These pending relocation info records are temporarily
   // stored in a separate buffer until a constant pool is emitted.
   // If every instruction in a long sequence is accessing the pool, we need one
   // pending relocation entry per instruction.
   static const int kMaxNumPRInfo = kMaxDistBetweenPools/kInstrSize;
   RelocInfo prinfo_[kMaxNumPRInfo];  // the buffer of pending relocation info
   int num_prinfo_;  // number of pending reloc info entries in the buffer
 
-  // Jump-to-jump elimination:
-  // The last label to be bound to _binding_pos, if unbound.
-  Label unbound_label_;
-  // The position to which _unbound_label has to be bound, if present.
-  int binding_pos_;
-  // The position before which jumps cannot be eliminated.
+  // The bound position, before this we cannot do instruction elimination.
   int last_bound_pos_;
 
   // source position information
   int last_position_;
   bool last_position_is_statement_;
 
   // Code emission
   inline void CheckBuffer();
   void GrowBuffer();
   inline void emit(Instr x);
@@ skipping 19 matching lines @@
 
   // Block the emission of the constant pool before pc_offset
   void BlockConstPoolBefore(int pc_offset) {
     if (no_const_pool_before_ < pc_offset) no_const_pool_before_ = pc_offset;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_ARM_H_