[AMDGPU][AsmParser][NFC] Simplify the EndpgmImm operand definition.

Clears the road to eliminating custom default operand handlers. Also
unifies naming of related entities.

Part of <#62629>.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D151687

Author: kosarev

llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp

@@ -1823,8 +1823,8 @@ class AMDGPUAsmParser : public MCTargetAsmParser {
   AMDGPUOperand::Ptr defaultCBSZ() const;
   AMDGPUOperand::Ptr defaultABID() const;
 
-  OperandMatchResultTy parseEndpgmOp(OperandVector &Operands);
-  AMDGPUOperand::Ptr defaultEndpgmImmOperands() const;
+  OperandMatchResultTy parseEndpgm(OperandVector &Operands);
+  AMDGPUOperand::Ptr defaultEndpgm() const;
 
   AMDGPUOperand::Ptr defaultWaitVDST() const;
   AMDGPUOperand::Ptr defaultWaitEXP() const;
@@ -8713,7 +8713,7 @@ AMDGPUOperand::Ptr AMDGPUAsmParser::defaultDppRowMask() const {
   return AMDGPUOperand::CreateImm(this, 0xf, SMLoc(), AMDGPUOperand::ImmTyDppRowMask);
 }
 
-AMDGPUOperand::Ptr AMDGPUAsmParser::defaultEndpgmImmOperands() const {
+AMDGPUOperand::Ptr AMDGPUAsmParser::defaultEndpgm() const {
   return AMDGPUOperand::CreateImm(this, 0, SMLoc(), AMDGPUOperand::ImmTyEndpgm);
 }
 
@@ -9196,7 +9196,7 @@ unsigned AMDGPUAsmParser::validateTargetOperandClass(MCParsedAsmOperand &Op,
 // endpgm
 //===----------------------------------------------------------------------===//
 
-OperandMatchResultTy AMDGPUAsmParser::parseEndpgmOp(OperandVector &Operands) {
+OperandMatchResultTy AMDGPUAsmParser::parseEndpgm(OperandVector &Operands) {
   SMLoc S = getLoc();
   int64_t Imm = 0;
 

llvm/lib/Target/AMDGPU/SIInstrInfo.td

@@ -980,14 +980,6 @@ def SwizzleMatchClass : AsmOperandClass {
   let IsOptional = 1;
 }
 
-def EndpgmMatchClass : AsmOperandClass {
-  let Name = "EndpgmImm";
-  let PredicateMethod = "isEndpgm";
-  let ParserMethod = "parseEndpgmOp";
-  let RenderMethod = "addImmOperands";
-  let IsOptional = 1;
-}
-
 def SWaitMatchClass : AsmOperandClass {
   let Name = "SWaitCnt";
   let RenderMethod = "addImmOperands";
@@ -1022,10 +1014,7 @@ def SwizzleImm : Operand<i16> {
   let ParserMatchClass = SwizzleMatchClass;
 }
 
-def EndpgmImm : Operand<i16> {
-  let PrintMethod = "printEndpgm";
-  let ParserMatchClass = EndpgmMatchClass;
-}
+def Endpgm : CustomOperand<i16, 1>;
 
 def WAIT_FLAG : Operand <i32> {
   let ParserMatchClass = SWaitMatchClass;

llvm/lib/Target/AMDGPU/SOPInstructions.td

@@ -1175,7 +1175,7 @@ multiclass SOPP_With_Relaxation <string opName, dag ins,
 def S_NOP : SOPP_Pseudo<"s_nop" , (ins i16imm:$simm16), "$simm16">;
 
 let isTerminator = 1 in {
-def S_ENDPGM : SOPP_Pseudo<"s_endpgm", (ins EndpgmImm:$simm16), "$simm16", [], ""> {
+def S_ENDPGM : SOPP_Pseudo<"s_endpgm", (ins Endpgm:$simm16), "$simm16", [], ""> {
   let isBarrier = 1;
   let isReturn = 1;
   let hasSideEffects = 1;