Add rotate-right instruction to hydrogen and use it instead of bitwise operations

src/ia32/lithium-ia32.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 161 matching lines @@
 const char* LArithmeticT::Mnemonic() const {
   switch (op()) {
     case Token::ADD: return "add-t";
     case Token::SUB: return "sub-t";
     case Token::MUL: return "mul-t";
     case Token::MOD: return "mod-t";
     case Token::DIV: return "div-t";
     case Token::BIT_AND: return "bit-and-t";
     case Token::BIT_OR: return "bit-or-t";
     case Token::BIT_XOR: return "bit-xor-t";
+    case Token::ROR: return "ror-t";
     case Token::SHL: return "sal-t";
     case Token::SAR: return "sar-t";
     case Token::SHR: return "shr-t";
     default:
       UNREACHABLE();
       return NULL;
   }
 }
 
 
@@ skipping 961 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
   argument_count_ -= instr->argument_count();
   LOperand* context = UseFixed(instr->context(), esi);
   return MarkAsCall(DefineFixed(new(zone()) LCallRuntime(context), eax), instr);
 }
 
 
+LInstruction* LChunkBuilder::DoRor(HRor* instr) {
+  return DoShift(Token::ROR, instr);
+}
+
+
 LInstruction* LChunkBuilder::DoShr(HShr* instr) {
   return DoShift(Token::SHR, instr);
 }
 
 
 LInstruction* LChunkBuilder::DoSar(HSar* instr) {
   return DoShift(Token::SAR, instr);
 }
 
 
@@ skipping 1222 matching lines @@
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32