diff --git a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
--- a/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
@@ -146,10 +146,6 @@
   let ParserMatchClass = s16ImmTarget;
 }
 
-def u8imm : Operand<i8> {
-  let PrintMethod = "printU8ImmOperand";
-}
-
 } // End OperandType = "OPERAND_IMMEDIATE"
 
 //===--------------------------------------------------------------------===//
diff --git a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h
--- a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h
+++ b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h
@@ -38,7 +38,6 @@
 private:
   void printU4ImmOperand(const MCInst *MI, unsigned OpNo,
                          const MCSubtargetInfo &STI, raw_ostream &O);
-  void printU8ImmOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
   void printU16ImmOperand(const MCInst *MI, unsigned OpNo,
                           const MCSubtargetInfo &STI, raw_ostream &O);
   void printU4ImmDecOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
diff --git a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.cpp b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.cpp
--- a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.cpp
+++ b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.cpp
@@ -60,11 +60,6 @@
   O << formatHex(MI->getOperand(OpNo).getImm() & 0xf);
 }
 
-void AMDGPUInstPrinter::printU8ImmOperand(const MCInst *MI, unsigned OpNo,
-                                          raw_ostream &O) {
-  O << formatHex(MI->getOperand(OpNo).getImm() & 0xff);
-}
-
 void AMDGPUInstPrinter::printU16ImmOperand(const MCInst *MI, unsigned OpNo,
                                            const MCSubtargetInfo &STI,
                                            raw_ostream &O) {