Index: lldb/include/lldb/Core/dwarf.h
===================================================================
--- lldb/include/lldb/Core/dwarf.h
+++ lldb/include/lldb/Core/dwarf.h
@@ -22,7 +22,7 @@
 typedef int32_t dw_sleb128_t;
 typedef uint16_t dw_attr_t;
 typedef uint16_t dw_form_t;
-typedef uint16_t dw_tag_t;
+typedef llvm::dwarf::Tag dw_tag_t;
 typedef uint64_t dw_addr_t; // Dwarf address define that must be big enough for
                             // any addresses in the compile units that get
                             // parsed
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFAbbreviationDeclaration.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFAbbreviationDeclaration.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFAbbreviationDeclaration.cpp
@@ -18,7 +18,8 @@
 using namespace lldb_private;
 
 DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration()
-    : m_code(InvalidCode), m_tag(0), m_has_children(0), m_attributes() {}
+    : m_code(InvalidCode), m_tag(llvm::dwarf::DW_TAG_null), m_has_children(0),
+      m_attributes() {}
 
 DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration(dw_tag_t tag,
                                                            uint8_t has_children)
@@ -33,7 +34,7 @@
     return DWARFEnumState::Complete;
 
   m_attributes.clear();
-  m_tag = data.GetULEB128(offset_ptr);
+  m_tag = static_cast<dw_tag_t>(data.GetULEB128(offset_ptr));
   if (m_tag == DW_TAG_null)
     return llvm::make_error<llvm::object::GenericBinaryError>(
         "abbrev decl requires non-null tag.");
@@ -68,7 +69,7 @@
 }
 
 bool DWARFAbbreviationDeclaration::IsValid() {
-  return m_code != 0 && m_tag != 0;
+  return m_code != 0 && m_tag != llvm::dwarf::DW_TAG_null;
 }
 
 uint32_t
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.cpp
@@ -30,7 +30,7 @@
   if (m_die)
     return m_die->Tag();
   else
-    return 0;
+    return llvm::dwarf::DW_TAG_null;
 }
 
 const char *DWARFBaseDIE::GetTagAsCString() const {
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.h
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.h
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.h
@@ -31,7 +31,7 @@
 
   DWARFDebugInfoEntry()
       : m_offset(DW_INVALID_OFFSET), m_parent_idx(0), m_sibling_idx(0),
-        m_has_children(false), m_abbr_idx(0), m_tag(0) {}
+        m_has_children(false), m_abbr_idx(0), m_tag(llvm::dwarf::DW_TAG_null) {}
 
   explicit operator bool() const { return m_offset != DW_INVALID_OFFSET; }
   bool operator==(const DWARFDebugInfoEntry &rhs) const;
@@ -178,8 +178,9 @@
       // a single NULL terminating child.
       m_has_children : 1;
   uint16_t m_abbr_idx;
-  uint16_t m_tag; // A copy of the DW_TAG value so we don't have to go through
-                  // the compile unit abbrev table
+  /// A copy of the DW_TAG value so we don't have to go through the compile
+  /// unit abbrev table
+  dw_tag_t m_tag = llvm::dwarf::DW_TAG_null;
 };
 
 #endif // SymbolFileDWARF_DWARFDebugInfoEntry_h_
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
@@ -192,7 +192,7 @@
     *offset_ptr = offset;
     return true;
   } else {
-    m_tag = 0;
+    m_tag = llvm::dwarf::DW_TAG_null;
     m_has_children = false;
     return true; // NULL debug tag entry
   }
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.h
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.h
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.h
@@ -23,7 +23,7 @@
 class DWARFDeclContext {
 public:
   struct Entry {
-    Entry() : tag(0), name(nullptr) {}
+    Entry() : tag(llvm::dwarf::DW_TAG_null), name(nullptr) {}
     Entry(dw_tag_t t, const char *n) : tag(t), name(n) {}
 
     bool NameMatches(const Entry &rhs) const {
Index: lldb/source/Plugins/SymbolFile/DWARF/HashedNameToDIE.h
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/HashedNameToDIE.h
+++ lldb/source/Plugins/SymbolFile/DWARF/HashedNameToDIE.h
@@ -53,7 +53,7 @@
 
   struct DIEInfo {
     dw_offset_t die_offset = DW_INVALID_OFFSET;
-    dw_tag_t tag = 0;
+    dw_tag_t tag = llvm::dwarf::DW_TAG_null;
 
     /// Any flags for this DIEInfo.
     uint32_t type_flags = 0;