MIPS: Tag length of FixedArrayBase and smi-array[x] as smi representation

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index f7cb241211d32c3bc673ab54c3b7b1ed9133fbb7..dc7b545da97c0bc49301a58e22ab327edad304d5 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -4936,6 +4936,13 @@ void LCodeGen::DoDoubleToSmi(LDoubleToSmi* instr) {
 }
 
 
+void LCodeGen::DoCheckSmiAndReturn(LCheckSmiAndReturn* instr) {
+  LOperand* input = instr->value();
+  __ And(at, ToRegister(input), Operand(kSmiTagMask));
+  DeoptimizeIf(ne, instr->environment(), at, Operand(zero_reg));
+}
+
+
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
   LOperand* input = instr->value();
   __ And(at, ToRegister(input), Operand(kSmiTagMask));