Replace a set of Hydrogen instructions with rotate instructions on ARM

src/arm/lithium-codegen-arm.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 1460 matching lines @@
         if (instr->can_deopt()) {
           __ mov(result, Operand(left, LSR, scratch), SetCC);
           DeoptimizeIf(mi, instr->environment());
         } else {
           __ mov(result, Operand(left, LSR, scratch));
         }
         break;
       case Token::SHL:
         __ mov(result, Operand(left, LSL, scratch));
         break;
+      case Token::ROR:
+        __ mov(result, Operand(left, ROR, scratch));
+        break;
       default:
         UNREACHABLE();
         break;
     }
   } else {
     // Mask the right_op operand.
     int value = ToInteger32(LConstantOperand::cast(right_op));
     uint8_t shift_count = static_cast<uint8_t>(value & 0x1F);
     switch (instr->op()) {
       case Token::SAR:
@@ skipping 14 matching lines @@
           __ Move(result, left);
         }
         break;
       case Token::SHL:
         if (shift_count != 0) {
           __ mov(result, Operand(left, LSL, shift_count));
         } else {
           __ Move(result, left);
         }
         break;
+      case Token::ROR:
+        if (shift_count != 0) {
+          __ mov(result, Operand(left, ROR, shift_count));
+        } else {
+          __ Move(result, left);
+        }
+        break;
       default:
         UNREACHABLE();
         break;
     }
   }
 }
 
 
 void LCodeGen::DoSubI(LSubI* instr) {
   LOperand* left = instr->left();
@@ skipping 4135 matching lines @@
   __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal