[RTG] Implement getAsmResultNames for FixedRegisterOp (#9058)

Author: maerhart

include/circt/Dialect/RTG/IR/RTGOps.td

@@ -16,6 +16,7 @@ include "mlir/IR/CommonTypeConstraints.td"
 include "mlir/IR/CommonAttrConstraints.td"
 include "mlir/IR/Properties.td"
 include "mlir/IR/SymbolInterfaces.td"
+include "mlir/IR/OpAsmInterface.td"
 include "mlir/Interfaces/InferTypeOpInterface.td"
 include "mlir/Interfaces/SideEffectInterfaces.td"
 include "mlir/Interfaces/InferTypeOpInterface.td"
@@ -657,6 +658,7 @@ def CommentOp : RTGOp<"comment", []> {
 def FixedRegisterOp : RTGOp<"fixed_reg", [
   Pure, ConstantLike,
   DeclareOpInterfaceMethods<InferTypeOpInterface>,
+  DeclareOpInterfaceMethods<OpAsmOpInterface, ["getAsmResultNames"]>,
 ]> {
   let summary = "returns a value representing a fixed register";
   let description = [{

lib/Dialect/RTG/IR/RTGOps.cpp

@@ -432,6 +432,10 @@ LogicalResult FixedRegisterOp::inferReturnTypes(
 
 OpFoldResult FixedRegisterOp::fold(FoldAdaptor adaptor) { return getRegAttr(); }
 
+void FixedRegisterOp::getAsmResultNames(OpAsmSetValueNameFn setNameFn) {
+  setNameFn(getResult(), getReg().getRegisterAssembly());
+}
+
 //===----------------------------------------------------------------------===//
 // VirtualRegisterOp
 //===----------------------------------------------------------------------===//