[NFC] Delete the redundant member 'shouldEmitMoves' from DwarfCFIException class

[RamNalamothu]

Summary

The data member 'shouldEmitMoves' is only used in DwarfCFIException::beginFunction()
and 'shouldEmitCFI' in DwarfCFIExceptionBase serves its purpose.

[MaskRay]

LGTM. I looked at the code just yesterday - to make -fno-asynchronous-unwind-tables -g work with more instrumentations:)

llvm/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp

 
 void DwarfCFIExceptionBase::endFragment() {
   if (shouldEmitCFI && !Asm->MF->hasBBSections())
     Asm->OutStreamer->emitCFIEndProc();
 }
 
 DwarfCFIException::DwarfCFIException(AsmPrinter *A)
     : DwarfCFIExceptionBase(A), shouldEmitPersonality(false),
-      forceEmitPersonality(false), shouldEmitLSDA(false),
-      shouldEmitMoves(false) {}
+      forceEmitPersonality(false), shouldEmitLSDA(false) {}
 
 DwarfCFIException::~DwarfCFIException() {}
 
 /// endModule - Emit all exception information that should come after the
 /// content.
 void DwarfCFIException::endModule() {
   // SjLj uses this pass and it doesn't need this info.
   if (!Asm->MAI->usesCFIForEH())

 }
 
 static MCSymbol *getExceptionSym(AsmPrinter *Asm,
                                  const MachineBasicBlock *MBB) {
   return Asm->getMBBExceptionSym(*MBB);
 }
 
 void DwarfCFIException::beginFunction(const MachineFunction *MF) {
-  shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false;
+  shouldEmitPersonality = shouldEmitLSDA = false;
   const Function &F = MF->getFunction();
 
   // If any landing pads survive, we need an EH table.
   bool hasLandingPads = !MF->getLandingPads().empty();
 
   // See if we need frame move info.
   AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves();
 
-  shouldEmitMoves = MoveType != AsmPrinter::CFI_M_None;
+  bool shouldEmitMoves = MoveType != AsmPrinter::CFI_M_None;
 
   const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
   unsigned PerEncoding = TLOF.getPersonalityEncoding();
   const Function *Per = nullptr;
   if (F.hasPersonalityFn())
     Per = dyn_cast<Function>(F.getPersonalityFn()->stripPointerCasts());
 
   // Emit a personality function even when there are no landing pads

llvm/lib/CodeGen/AsmPrinter/DwarfException.h

class LLVM_LIBRARY_VISIBILITY DwarfCFIException : public DwarfCFIExceptionBase {
   bool shouldEmitPersonality;
 
   /// Per-function flag to indicate if .cfi_personality must be emitted.
   bool forceEmitPersonality;
 
   /// Per-function flag to indicate if .cfi_lsda should be emitted.
   bool shouldEmitLSDA;
 
-  /// Per-function flag to indicate if frame moves info should be emitted.
-  bool shouldEmitMoves;
-
 public:
   //===--------------------------------------------------------------------===//
   // Main entry points.
   //
   DwarfCFIException(AsmPrinter *A);
   ~DwarfCFIException() override;
 
   /// Emit all exception information that should come after the content.