Revert r6748....

src/x64/lithium-x64.cc

 // Copyright 2011 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 1232 matching lines @@
 
 LInstruction* LChunkBuilder::DoBitNot(HBitNot* instr) {
   ASSERT(instr->value()->representation().IsInteger32());
   ASSERT(instr->representation().IsInteger32());
   LOperand* input = UseRegisterAtStart(instr->value());
   LBitNotI* result = new LBitNotI(input);
   return DefineSameAsFirst(result);
 }
 
 
-LInstruction* LChunkBuilder::DoNeg(HNeg* instr) {
-  Abort("Unimplemented: %s", "DoNeg");
-  return NULL;
-}
-
-
 LInstruction* LChunkBuilder::DoBitOr(HBitOr* instr) {
   return DoBit(Token::BIT_OR, instr);
 }
 
 
 LInstruction* LChunkBuilder::DoBitXor(HBitXor* instr) {
   return DoBit(Token::BIT_XOR, instr);
 }
 
 
@@ skipping 616 matching lines @@
 
 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
   HEnvironment* outer = current_block_->last_environment()->outer();
   current_block_->UpdateEnvironment(outer);
   return NULL;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64