Revert "Emit CodeView type records for nested classes."

This reverts commit 256b29322c827a2d94da56468c936596f5509032.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274632 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/CodeViewDebug.cpp

@@ -1414,8 +1414,6 @@ struct llvm::ClassInfo {
   MemberList Members;
   // Direct overloaded methods gathered by name.
   MethodsMap Methods;
-
-  std::vector<const DICompositeType *> NestedClasses;
 };
 
 void CodeViewDebug::clear() {
@@ -1468,8 +1466,8 @@ ClassInfo CodeViewDebug::collectClassInfo(const DICompositeType *Ty) {
         // friends in the past, but modern versions do not.
       }
       // FIXME: Get Clang to emit function virtual table here and handle it.
-    } else if (auto *Composite = dyn_cast<DICompositeType>(Element)) {
-      Info.NestedClasses.push_back(Composite);
+      // FIXME: Get clang to emit nested types here and do something with
+      // them.
     }
     // Skip other unrecognized kinds of elements.
   }
@@ -1498,12 +1496,7 @@ TypeIndex CodeViewDebug::lowerCompleteTypeClass(const DICompositeType *Ty) {
   TypeIndex FieldTI;
   TypeIndex VShapeTI;
   unsigned FieldCount;
-  bool ContainsNestedClass;
-  std::tie(FieldTI, VShapeTI, FieldCount, ContainsNestedClass) =
-      lowerRecordFieldList(Ty);
-
-  if (ContainsNestedClass)
-    CO |= ClassOptions::ContainsNestedClass;
+  std::tie(FieldTI, VShapeTI, FieldCount) = lowerRecordFieldList(Ty);
 
   std::string FullName = getFullyQualifiedName(Ty);
 
@@ -1539,13 +1532,7 @@ TypeIndex CodeViewDebug::lowerCompleteTypeUnion(const DICompositeType *Ty) {
   ClassOptions CO = getCommonClassOptions(Ty);
   TypeIndex FieldTI;
   unsigned FieldCount;
-  bool ContainsNestedClass;
-  std::tie(FieldTI, std::ignore, FieldCount, ContainsNestedClass) =
-      lowerRecordFieldList(Ty);
-
-  if (ContainsNestedClass)
-    CO |= ClassOptions::ContainsNestedClass;
-
+  std::tie(FieldTI, std::ignore, FieldCount) = lowerRecordFieldList(Ty);
   uint64_t SizeInBytes = Ty->getSizeInBits() / 8;
   std::string FullName = getFullyQualifiedName(Ty);
 
@@ -1563,7 +1550,7 @@ TypeIndex CodeViewDebug::lowerCompleteTypeUnion(const DICompositeType *Ty) {
   return UnionTI;
 }
 
-std::tuple<TypeIndex, TypeIndex, unsigned, bool>
+std::tuple<TypeIndex, TypeIndex, unsigned>
 CodeViewDebug::lowerRecordFieldList(const DICompositeType *Ty) {
   // Manually count members. MSVC appears to count everything that generates a
   // field list record. Each individual overload in a method overload group
@@ -1658,17 +1645,8 @@ CodeViewDebug::lowerRecordFieldList(const DICompositeType *Ty) {
           OverloadedMethodRecord(Methods.size(), MethodList, Name));
     }
   }
-
-  // Create nested classes.
-  for (const DICompositeType *Nested : Info.NestedClasses) {
-    NestedTypeRecord R(getTypeIndex(DITypeRef(Nested)), Nested->getName());
-    Fields.writeNestedType(R);
-    MemberCount++;
-  }
-
   TypeIndex FieldTI = TypeTable.writeFieldList(Fields);
-  return std::make_tuple(FieldTI, TypeIndex(), MemberCount,
-                         !Info.NestedClasses.empty());
+  return std::make_tuple(FieldTI, TypeIndex(), MemberCount);
 }
 
 TypeIndex CodeViewDebug::getVBPTypeIndex() {

lib/CodeGen/AsmPrinter/CodeViewDebug.h

@@ -275,7 +275,7 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public DebugHandlerBase {
   /// Common record member lowering functionality for record types, which are
   /// structs, classes, and unions. Returns the field list index and the member
   /// count.
-  std::tuple<codeview::TypeIndex, codeview::TypeIndex, unsigned, bool>
+  std::tuple<codeview::TypeIndex, codeview::TypeIndex, unsigned>
   lowerRecordFieldList(const DICompositeType *Ty);
 
   /// Inserts {{Node, ClassTy}, TI} into TypeIndices and checks for duplicates.