[NFC][DecoderEmitter] Remove unused emitPredicateMatchAux (#158771)

Author: jurahul

llvm/utils/TableGen/DecoderEmitter.cpp

@@ -515,9 +515,6 @@ class DecoderTableBuilder {
 
   unsigned getPredicateIndex(StringRef P) const;
 
-  bool emitPredicateMatchAux(const Init &Val, bool ParenIfBinOp,
-                             raw_ostream &OS) const;
-
   bool emitPredicateMatch(raw_ostream &OS, unsigned EncodingID) const;
 
   void emitPredicateTableEntry(unsigned EncodingID) const;
@@ -1099,40 +1096,6 @@ unsigned DecoderTableBuilder::getDecoderIndex(unsigned EncodingID) const {
   return std::distance(Decoders.begin(), P);
 }
 
-// If ParenIfBinOp is true, print a surrounding () if Val uses && or ||.
-bool DecoderTableBuilder::emitPredicateMatchAux(const Init &Val,
-                                                bool ParenIfBinOp,
-                                                raw_ostream &OS) const {
-  if (const auto *D = dyn_cast<DefInit>(&Val)) {
-    if (!D->getDef()->isSubClassOf("SubtargetFeature"))
-      return true;
-    OS << "Bits[" << Target.getName() << "::" << D->getAsString() << "]";
-    return false;
-  }
-  if (const auto *D = dyn_cast<DagInit>(&Val)) {
-    std::string Op = D->getOperator()->getAsString();
-    if (Op == "not" && D->getNumArgs() == 1) {
-      OS << '!';
-      return emitPredicateMatchAux(*D->getArg(0), true, OS);
-    }
-    if ((Op == "any_of" || Op == "all_of") && D->getNumArgs() > 0) {
-      bool Paren = D->getNumArgs() > 1 && std::exchange(ParenIfBinOp, true);
-      if (Paren)
-        OS << '(';
-      ListSeparator LS(Op == "any_of" ? " || " : " && ");
-      for (auto *Arg : D->getArgs()) {
-        OS << LS;
-        if (emitPredicateMatchAux(*Arg, ParenIfBinOp, OS))
-          return true;
-      }
-      if (Paren)
-        OS << ')';
-      return false;
-    }
-  }
-  return true;
-}
-
 // Returns true if there was any predicate emitted.
 bool DecoderTableBuilder::emitPredicateMatch(raw_ostream &OS,
                                              unsigned EncodingID) const {