Replace a set of Hydrogen instructions with rotate instructions on ARM

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
===================================================================
--- src/arm/lithium-arm.cc	(revision 12582)
+++ src/arm/lithium-arm.cc	(working copy)
@@ -180,6 +180,7 @@
     case Token::SHL: return "shl-t";
     case Token::SAR: return "sar-t";
     case Token::SHR: return "shr-t";
+    case Token::ROR: return "ror-t";
     default:
       UNREACHABLE();
       return NULL;
@@ -1122,6 +1123,11 @@
 }
 
 
+LInstruction* LChunkBuilder::DoRor(HRor* instr) {
+  return DoShift(Token::ROR, instr);
+}
+
+
 LInstruction* LChunkBuilder::DoBitwise(HBitwise* instr) {
   if (instr->representation().IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());