MIPS: Add rotate-right instruction to hydrogen and use it instead of bitwise operations of the form…

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index b7ba1fb3e753cacf4991c8480a41e4cc5b29406c..fa84882718f43bee4472ac6c977c4e8054378d01 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -177,6 +177,7 @@ const char* LArithmeticT::Mnemonic() const {
     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 "sll-t";
     case Token::SAR: return "sra-t";
     case Token::SHR: return "srl-t";