Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/mips/lithium-mips.cc

 // Copyright 2012 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 1309 matching lines @@
     ASSERT(instr->right()->representation().IsTagged());
 
     LOperand* left = UseFixed(instr->left(), a1);
     LOperand* right = UseFixed(instr->right(), a0);
     LArithmeticT* result = new(zone()) LArithmeticT(instr->op(), left, right);
     return MarkAsCall(DefineFixed(result, v0), instr);
   }
 }
 
 
-LInstruction* LChunkBuilder::DoBitNot(HBitNot* instr) {
-  ASSERT(instr->value()->representation().IsInteger32());
-  ASSERT(instr->representation().IsInteger32());
-  if (instr->HasNoUses()) return NULL;
-  LOperand* value = UseRegisterAtStart(instr->value());
-  return DefineAsRegister(new(zone()) LBitNotI(value));
-}
-
-
 LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
   if (instr->representation().IsDouble()) {
     return DoArithmeticD(Token::DIV, instr);
   } else if (instr->representation().IsSmiOrInteger32()) {
     ASSERT(instr->left()->representation().Equals(instr->representation()));
     ASSERT(instr->right()->representation().Equals(instr->representation()));
     LOperand* dividend = UseRegister(instr->left());
     LOperand* divisor = UseRegister(instr->right());
     LDivI* div = new(zone()) LDivI(dividend, divisor);
     return AssignEnvironment(DefineAsRegister(div));
@@ skipping 1171 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseRegister(instr->index());
   return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal