[AMDGPU] Remove the unused u8imm operand definition.

Reviewed By: foad

Differential Revision: https://reviews.llvm.org/D142193

Author: kosarev

llvm/lib/Target/AMDGPU/AMDGPUInstructions.td

@@ -146,10 +146,6 @@ def s16imm : Operand<i16> {
   let ParserMatchClass = s16ImmTarget;
 }
 
-def u8imm : Operand<i8> {
-  let PrintMethod = "printU8ImmOperand";
-}
-
 } // End OperandType = "OPERAND_IMMEDIATE"
 
 //===--------------------------------------------------------------------===//

llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.cpp

@@ -60,11 +60,6 @@ void AMDGPUInstPrinter::printU4ImmOperand(const MCInst *MI, unsigned OpNo,
   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) {

llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUInstPrinter.h

@@ -38,7 +38,6 @@ class AMDGPUInstPrinter : public MCInstPrinter {
 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);