diff --git a/src/hir2mpl/bytecode_input/common/src/bc_function.cpp b/src/hir2mpl/bytecode_input/common/src/bc_function.cpp
index f316a33783bbcce49bbec4cfca2142f2757c4387..e6e816f6e975c4cbf60eeef21501f3e4e3d099f0 100644
--- a/src/hir2mpl/bytecode_input/common/src/bc_function.cpp
+++ b/src/hir2mpl/bytecode_input/common/src/bc_function.cpp
@@ -86,7 +86,8 @@ bool BCFunction::GenerateAliasVars(const std::string &phaseName) {
           namemangler::EncodeName(std::get<0>(item)));
       MIRAliasVars aliasVar;
       aliasVar.mplStrIdx = GlobalTables::GetStrTable().GetOrCreateStrIdxFromName(localVar->GetName(*mirType));
-      aliasVar.tyIdx = mirType->GetTypeIndex();
+      aliasVar.atk = ATK_type;
+      aliasVar.index = mirType->GetTypeIndex().GetIdx();
       aliasVar.isLocal = !localVar->IsGlobal();
       if (!std::get<2>(item).empty()) {
         aliasVar.sigStrIdx = GlobalTables::GetStrTable().GetOrCreateStrIdxFromName(std::get<2>(item));
diff --git a/src/hir2mpl/common/src/fe_function.cpp b/src/hir2mpl/common/src/fe_function.cpp
index 9a8e01aab3b2a3bc8ee4eb160d03d5cefd8e47e7..b9cad3e24b772d384f38b24b8db7a60dd293c2d3 100644
--- a/src/hir2mpl/common/src/fe_function.cpp
+++ b/src/hir2mpl/common/src/fe_function.cpp
@@ -858,11 +858,14 @@ void FEFunction::AddAliasInMIRScope(MIRScope *scope, const std::string &srcVarNa
   aliasVar.mplStrIdx = symbol->GetNameStrIdx();
   aliasVar.isLocal = symbol->IsLocal();
   if (sourceType != nullptr) {
-    aliasVar.tyIdx = sourceType->GetTypeIndex();
+    aliasVar.atk = ATK_type;
+    aliasVar.index = sourceType->GetTypeIndex().GetIdx();
   } else if (typeNameIdx != 0) {
-    aliasVar.srcTypeStrIdx = typeNameIdx;
+    aliasVar.atk = ATK_string;
+    aliasVar.index = typeNameIdx.GetIdx();
   } else {
-    aliasVar.tyIdx = symbol->GetTyIdx();
+    aliasVar.atk = ATK_type;
+    aliasVar.index = symbol->GetTyIdx().GetIdx();
   }
   scope->SetAliasVarMap(nameIdx, aliasVar);
 };
diff --git a/src/mapleall/maple_ir/include/mir_scope.h b/src/mapleall/maple_ir/include/mir_scope.h
index d36e55e87af4502445e54e42597d3f58ef56122a..1d86431359283df92b040976416c0206223ff5ae 100644
--- a/src/mapleall/maple_ir/include/mir_scope.h
+++ b/src/mapleall/maple_ir/include/mir_scope.h
@@ -21,10 +21,16 @@
 
 namespace maple {
 // mapping src variable to mpl variables to display debug info
+enum AliasTypeKind {
+  ATK_type,
+  ATK_string,
+  ATK_enum,
+};
+
 struct MIRAliasVars {
   GStrIdx mplStrIdx;      // maple varialbe name
-  TyIdx tyIdx;
-  GStrIdx srcTypeStrIdx;  // src type name
+  AliasTypeKind atk;
+  unsigned index;
   bool isLocal;
   GStrIdx sigStrIdx;
 };
diff --git a/src/mapleall/maple_ir/src/bin_func_export.cpp b/src/mapleall/maple_ir/src/bin_func_export.cpp
index cffdf1e75e31536fb48097d53af3fcbc64089a88..cf068215461cddfe8432e943c9a271346388a805 100644
--- a/src/mapleall/maple_ir/src/bin_func_export.cpp
+++ b/src/mapleall/maple_ir/src/bin_func_export.cpp
@@ -138,7 +138,8 @@ void BinaryMplExport::OutputAliasMap(MapleMap<GStrIdx, MIRAliasVars> &aliasVarMa
   for (std::pair<GStrIdx, MIRAliasVars> it : aliasVarMap) {
     OutputStr(it.first);
     OutputStr(it.second.mplStrIdx);
-    OutputType(it.second.tyIdx);
+    WriteNum(static_cast<uint32>(it.second.atk));
+    WriteNum(it.second.index);
     OutputStr(it.second.sigStrIdx);
   }
 }
diff --git a/src/mapleall/maple_ir/src/bin_func_import.cpp b/src/mapleall/maple_ir/src/bin_func_import.cpp
index b83f41af7f2ac39b9bfebbe488dd179e20582ce0..58f792bfa4d714d0a03dbfc1f537c7267823224f 100644
--- a/src/mapleall/maple_ir/src/bin_func_import.cpp
+++ b/src/mapleall/maple_ir/src/bin_func_import.cpp
@@ -153,7 +153,8 @@ void BinaryMplImport::ImportAliasMap(MIRFunction *func) {
     MIRAliasVars aliasvars;
     GStrIdx strIdx = ImportStr();
     aliasvars.mplStrIdx = ImportStr();
-    aliasvars.tyIdx = ImportType();
+    aliasvars.atk = static_cast<AliasTypeKind>(ReadNum());
+    aliasvars.index = static_cast<uint32>(ReadNum());
     (void)ImportStr();  // not assigning to mimic parser
     func->GetAliasVarMap()[strIdx] = aliasvars;
   }
diff --git a/src/mapleall/maple_ir/src/debug_info.cpp b/src/mapleall/maple_ir/src/debug_info.cpp
index ebba03fd8f52611724ce4eb585eb20e7c070400c..b3043f6327c121c826636b2901903bea90c9ad03 100644
--- a/src/mapleall/maple_ir/src/debug_info.cpp
+++ b/src/mapleall/maple_ir/src/debug_info.cpp
@@ -352,8 +352,9 @@ void DebugInfo::AddAliasDies(MapleMap<GStrIdx, MIRAliasVars> &aliasMap) {
     DBGDie *vdie = CreateVarDie(var, i.first);
 
     // use src code type name for type if provided
-    if (i.second.srcTypeStrIdx.GetIdx()) {
-      DBGDie *typedefDie = GetOrCreateTypedefDie(i.second.srcTypeStrIdx, var->GetTyIdx());
+    if (i.second.atk == ATK_string) {
+      GStrIdx idx(i.second.index);
+      DBGDie *typedefDie = GetOrCreateTypedefDie(idx, var->GetTyIdx());
       // use negtive number to indicate DIE id instead of tyidx in normal cases
       (void)(vdie->SetAttr(DW_AT_type, -typedefDie->GetId()));
     }
diff --git a/src/mapleall/maple_ir/src/mir_scope.cpp b/src/mapleall/maple_ir/src/mir_scope.cpp
index c0882a82389812469577afb6a200dfc574bb3851..0f5659dad2369d25e31f735933759979576188df 100644
--- a/src/mapleall/maple_ir/src/mir_scope.cpp
+++ b/src/mapleall/maple_ir/src/mir_scope.cpp
@@ -124,11 +124,25 @@ void MIRScope::Dump(int32 indent) const {
     LogInfo::MapleLogger() << "ALIAS %" << GlobalTables::GetStrTable().GetStringFromStrIdx(it.first)
                            << ((it.second.isLocal) ? " %" : " $")
                            << GlobalTables::GetStrTable().GetStringFromStrIdx(it.second.mplStrIdx) << " ";
-    if (it.second.tyIdx) {
-      GlobalTables::GetTypeTable().GetTypeFromTyIdx(it.second.tyIdx)->Dump(0);
-    } else {
-      LogInfo::MapleLogger() << "\"" << GlobalTables::GetStrTable().GetStringFromStrIdx(it.second.srcTypeStrIdx)
-                             << "\"";
+    switch (it.second.atk) {
+      case ATK_type: {
+        TyIdx idx(it.second.index);
+        GlobalTables::GetTypeTable().GetTypeFromTyIdx(TyIdx(idx))->Dump(0);
+        break;
+      }
+      case ATK_string: {
+        GStrIdx idx(it.second.index);
+        LogInfo::MapleLogger() << "\"" << GlobalTables::GetStrTable().GetStringFromStrIdx(idx)
+                               << "\"";
+        break;
+      }
+      case ATK_enum: {
+        MIREnum *mirEnum = GlobalTables::GetEnumTable().enumTable[it.second.index];
+        LogInfo::MapleLogger() << "$" << GlobalTables::GetStrTable().GetStringFromStrIdx(mirEnum->nameStrIdx);
+        break;
+      }
+      default :
+        break;
     }
     if (it.second.sigStrIdx) {
       LogInfo::MapleLogger() << " \"" << GlobalTables::GetStrTable().GetStringFromStrIdx(it.second.sigStrIdx) << "\"";
diff --git a/src/mapleall/maple_ir/src/parser.cpp b/src/mapleall/maple_ir/src/parser.cpp
index 746e1c8d64fe52ba4cac9b32951757921a14c4a2..552d22e1624ff830de6fdfc3e966a13068634e29 100644
--- a/src/mapleall/maple_ir/src/parser.cpp
+++ b/src/mapleall/maple_ir/src/parser.cpp
@@ -2596,31 +2596,48 @@ bool MIRParser::ParseOneAlias(GStrIdx &strIdx, MIRAliasVars &aliasVar) {
   }
   strIdx = GlobalTables::GetStrTable().GetOrCreateStrIdxFromName(lexer.GetName());
   nameTk = lexer.NextToken();
-  bool isLocal;
   if (nameTk == TK_lname) {
-    isLocal = true;
+    aliasVar.isLocal = true;
   } else if (nameTk == TK_gname) {
-    isLocal = false;
+    aliasVar.isLocal = false;
   } else {
     Error("expect name in ALIAS but get ");
     return false;
   }
   GStrIdx mplStrIdx = GlobalTables::GetStrTable().GetOrCreateStrIdxFromName(lexer.GetName());
   aliasVar.mplStrIdx = mplStrIdx;
-  aliasVar.isLocal = isLocal;
   lexer.NextToken();
   TokenKind tk = lexer.GetTokenKind();
   TyIdx tyIdx(0);
-  if (tk == TK_string || tk == TK_gname) {
+  if (tk == TK_string) {
     // original type name from source code
     std::string typeName = lexer.GetName();
     GStrIdx srcTypeStrIdx = GlobalTables::GetStrTable().GetOrCreateStrIdxFromName(typeName);
-    aliasVar.tyIdx = TyIdx(0);
-    aliasVar.srcTypeStrIdx = srcTypeStrIdx;
+    aliasVar.atk = ATK_string;
+    aliasVar.index = srcTypeStrIdx.GetIdx();
+    lexer.NextToken();
+  } else if (tk == TK_gname) {
+    // type name or enum name
+    std::string typeName = lexer.GetName();
+    GStrIdx strIdx = GlobalTables::GetStrTable().GetOrCreateStrIdxFromName(typeName);
+    TyIdx tyIdx = mod.GetTypeNameTab()->GetTyIdxFromGStrIdx(strIdx);
+    if (tyIdx.GetIdx() != 0) {
+      aliasVar.atk = ATK_type;
+      aliasVar.index = tyIdx.GetIdx();
+    } else {
+      unsigned size = GlobalTables::GetEnumTable().enumTable.size();
+      for (unsigned i = 0; i < size; ++i) {
+        MIREnum *mirEnum = GlobalTables::GetEnumTable().enumTable[i];
+        if (strIdx == mirEnum->nameStrIdx) {
+          aliasVar.atk = ATK_enum;
+          aliasVar.index = i;
+        }
+      }
+    }
     lexer.NextToken();
   } else if (ParseType(tyIdx)) {
-    aliasVar.tyIdx = tyIdx;
-    aliasVar.srcTypeStrIdx = GStrIdx(0);
+    aliasVar.atk = ATK_type;
+    aliasVar.index = tyIdx.GetIdx();
   } else {
     Error("parseType failed when parsing ALIAS ");
     return false;