[AsmPrinter] Delete dead code; NFC

Delete some snippets that had been commented out since commit a10f592
in release_13x.

Author: bryanpkc

llvm/lib/CodeGen/AsmPrinter/DebugLocEntry.h

@@ -228,15 +228,6 @@ class DbgValueLoc {
   LLVM_DUMP_METHOD void dump() const {
     for (const DbgValueLocEntry &DV : ValueLocEntries)
       DV.dump();
-//    if (isLocation()) {
-//      llvm::dbgs() << "Loc = { reg=" << Loc.getReg() << " ";
-//      if (Loc.isIndirect())
-//        llvm::dbgs() << "+0";
-//      llvm::dbgs() << "} ";
-//    } else if (isConstantInt())
-//      Constant.CIP->dump();
-//    else if (isConstantFP())
-//      Constant.CFP->dump();
     if (Expression)
       Expression->dump();
   }
@@ -313,9 +304,6 @@ class DebugLocEntry {
                 DebugLocStream::ListBuilder &List,
                 const DIBasicType *BT,
                 DwarfCompileUnit &TheCU);
-
-//  void finalize(const AsmPrinter &AP, DebugLocStream::ListBuilder &List,
-//                const DIStringType *ST, DwarfCompileUnit &TheCU);
 };
 
 /// Compare two DbgValueLocEntries for equality.
@@ -344,29 +332,6 @@ inline bool operator==(const DbgValueLoc &A, const DbgValueLoc &B) {
          A.Expression == B.Expression && A.IsVariadic == B.IsVariadic;
 }
 
-//inline bool operator==(const DbgValueLoc &A,
-//                       const DbgValueLoc &B) {
-//  if (A.EntryKind != B.EntryKind)
-//    return false;
-//
-//  if (A.Expression != B.Expression)
-//   return false;
-//
-//  switch (A.EntryKind) {
-//  case DbgValueLoc::E_Location:
-//    return A.Loc == B.Loc;
-//  case DbgValueLoc::E_TargetIndexLocation:
-//    return A.TIL == B.TIL;
-//  case DbgValueLoc::E_Integer:
-//    return A.Constant.Int == B.Constant.Int;
-//  case DbgValueLoc::E_ConstantFP:
-//    return A.Constant.CFP == B.Constant.CFP;
-//  case DbgValueLoc::E_ConstantInt:
-//    return A.Constant.CIP == B.Constant.CIP;
-//  }
-//  llvm_unreachable("unhandled EntryKind");
-//}
-
 /// Compare two fragments based on their offset.
 inline bool operator<(const DbgValueLoc &A,
                       const DbgValueLoc &B) {

llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp

@@ -1869,28 +1869,10 @@ DbgEntity *DwarfDebug::createConcreteEntity(DwarfCompileUnit &TheCU,
   return ConcreteEntities.back().get();
 }
 
-#if 0
-void DwarfDebug::populateDependentTypeMap() {
- for (const auto &I : DbgValues) {
-   InlinedEntity IV = I.first;
-   if (I.second.empty())
-     continue;
-   if (const DIVariable *DIV = dyn_cast<DIVariable>(IV.first)) {
-     if (const DIStringType *ST = dyn_cast<DIStringType>(
-             static_cast<const Metadata *>(DIV->getType())))
-       if (const DIVariable *LV = ST->getStringLength())
-         VariableInDependentType[LV] = ST;
-   }
- }
-}
-#endif
-
 // Find variables for each lexical scope.
 void DwarfDebug::collectEntityInfo(DwarfCompileUnit &TheCU,
                                    const DISubprogram *SP,
                                    DenseSet<InlinedEntity> &Processed) {
-//  clearDependentTracking();
-//  populateDependentTypeMap();
   // Grab the variable info that was squirreled away in the MMI side-table.
   collectVariableInfoFromMFTable(TheCU, Processed);
 
@@ -1909,11 +1891,6 @@ void DwarfDebug::collectEntityInfo(DwarfCompileUnit &TheCU,
 
     LexicalScope *Scope = nullptr;
     const DILocalVariable *LocalVar = cast<DILocalVariable>(IV.first);
-#if 0
-    const DILocalVariable *LocalVar = dyn_cast<DILocalVariable>(IV.first);
-    if (!LocalVar)
-      continue;
-#endif
     if (const DILocation *IA = IV.second)
       Scope = LScopes.findInlinedScope(LocalVar->getScope(), IA);
     else
@@ -1972,24 +1949,6 @@ void DwarfDebug::collectEntityInfo(DwarfCompileUnit &TheCU,
     // Finalize the entry by lowering it into a DWARF bytestream.
     for (auto &Entry : Entries)
       Entry.finalize(*Asm, List, BT, TheCU);
-#if 0
-   List.finalize();
-
-   if (VariableInDependentType.count(LocalVar)) {
-     const DIType *DT = VariableInDependentType[LocalVar];
-     if (const DIStringType *ST = dyn_cast<DIStringType>(DT)) {
-       unsigned Offset;
-       DbgVariable TVar = {LocalVar, IV.second};
-       DebugLocStream::ListBuilder LB(DebugLocs, TheCU, *Asm, TVar, *MInsn);
-       for (auto &Entry : Entries)
-         Entry.finalize(*Asm, LB, ST, TheCU);
-       LB.finalize();
-       Offset = TVar.getDebugLocListIndex();
-       if (Offset != ~0u)
-         addStringTypeLoc(ST, Offset);
-      }
-    }
-#endif
   }
 
   // For each InlinedEntity collected from DBG_LABEL instructions, convert to
@@ -2799,35 +2758,6 @@ void DebugLocEntry::finalize(const AsmPrinter &AP,
     List.setTagOffset(*DwarfExpr.TagOffset);
 }
 
-#if 0
-inline static DbgValueLoc mkDbgValueLoc(const DIExpression *expr,
-                                        DbgValueLoc &value) {
-  if (value.isInt())
-    return DbgValueLoc(expr, value.getInt());
-  if (value.isLocation())
-    return DbgValueLoc(expr, value.getLoc());
-  if (value.isConstantInt())
-    return DbgValueLoc(expr, value.getConstantInt());
-  assert(value.isConstantFP());
-  return DbgValueLoc(expr, value.getConstantFP());
-}
-
-void DebugLocEntry::finalize(const AsmPrinter &AP,
-                             DebugLocStream::ListBuilder &List,
-                             const DIStringType *ST,
-                             DwarfCompileUnit &TheCU) {
-  DebugLocStream::EntryBuilder Entry(List, Begin, End);
-  BufferByteStreamer Streamer = Entry.getStreamer();
-  DebugLocDwarfExpression DwarfExpr(AP.getDwarfVersion(), Streamer, TheCU);
-  DbgValueLoc &Value = Values[0];
-  assert(!Value.isFragment());
-  assert(Values.size() == 1 && "only fragments may have >1 value");
-  Value = mkDbgValueLoc(ST->getStringLengthExp(), Value);
-  DwarfDebug::emitDebugLocValue(AP, nullptr, Value, DwarfExpr);
-  DwarfExpr.finalize();
-}
-#endif
-
 void DwarfDebug::emitDebugLocEntryLocation(const DebugLocStream::Entry &Entry,
                                            const DwarfCompileUnit *CU) {
   // Emit the size.

llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h

@@ -698,14 +698,6 @@ class DwarfDebug : public DebugHandlerBase {
   /// Emit the reference to the section.
   void emitSectionReference(const DwarfCompileUnit &CU);
 
-#if 0
-  /// Populate dependent type variable map
-  void populateDependentTypeMap();
-#endif
-
-  /// Clear dependent type tracking map
-  void clearDependentTracking() { VariableInDependentType.clear(); }
-
 protected:
   /// Gather pre-function debug information.
   void beginFunctionImpl(const MachineFunction *MF) override;