Revert revision 5657.

src/bytecodes-irregexp.h

 // Copyright 2008-2009 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 70 matching lines @@
 V(LOOKUP_MAP1,       37, 12)  /* bc8 pad8 start16 bit_map_addr32 addr32     */ \
 V(LOOKUP_MAP2,       38, 96)  /* bc8 pad8 start16 half_nibble_map_addr32*   */ \
 V(LOOKUP_MAP8,       39, 96)  /* bc8 pad8  start16 byte_map addr32*         */ \
 V(LOOKUP_HI_MAP8,    40, 96)  /* bc8 start24 byte_map_addr32 addr32*        */ \
 V(CHECK_REGISTER_LT, 41, 12)  /* bc8 reg_idx24 value32 addr32               */ \
 V(CHECK_REGISTER_GE, 42, 12)  /* bc8 reg_idx24 value32 addr32               */ \
 V(CHECK_REGISTER_EQ_POS, 43, 8) /* bc8 reg_idx24 addr32                     */ \
 V(CHECK_AT_START,    44, 8)   /* bc8 pad24 addr32                           */ \
 V(CHECK_NOT_AT_START, 45, 8)  /* bc8 pad24 addr32                           */ \
 V(CHECK_GREEDY,      46, 8)   /* bc8 pad24 addr32                           */ \
-V(ADVANCE_CP_AND_GOTO, 47, 8) /* bc8 offset24 addr32                        */ \
-V(SET_CURRENT_POSITION_FROM_END, 48, 4) /* bc8 idx24                        */
+V(ADVANCE_CP_AND_GOTO, 47, 8) /* bc8 offset24 addr32                        */
 
 #define DECLARE_BYTECODES(name, code, length) \
   static const int BC_##name = code;
 BYTECODE_ITERATOR(DECLARE_BYTECODES)
 #undef DECLARE_BYTECODES
 
 #define DECLARE_BYTECODE_LENGTH(name, code, length) \
   static const int BC_##name##_LENGTH = length;
 BYTECODE_ITERATOR(DECLARE_BYTECODE_LENGTH)
 #undef DECLARE_BYTECODE_LENGTH
 } }
 
 #endif  // V8_BYTECODES_IRREGEXP_H_