Index: lib/Target/Mips/MipsInstrInfo.td
===================================================================
--- lib/Target/Mips/MipsInstrInfo.td
+++ lib/Target/Mips/MipsInstrInfo.td
@@ -563,10 +563,6 @@
 
 def imm64: Operand<i64>;
 
-def simm6 : Operand<i32> {
-  let ParserMatchClass = ConstantSImm6AsmOperandClass;
-  let OperandType = "OPERAND_IMMEDIATE";
-}
 def simm9 : Operand<i32>;
 def simm10 : Operand<i32>;
 def simm11 : Operand<i32>;
@@ -735,7 +731,7 @@
   }
 
 // Signed operands
-foreach I = {4, 5} in
+foreach I = {4, 5, 6} in
   def simm # I : Operand<i32> {
     let DecoderMethod = "DecodeSImmWithOffsetAndScale<" # I # ">";
     let ParserMatchClass =