diff --git a/src/mapleall/maple_ir/include/debug_info.h b/src/mapleall/maple_ir/include/debug_info.h
index e11b3c59dc8eefa0e27d3de94f2a3bd3e2dbad13..bd1eb3acc24f44a6839fc7098899908f0416fd2a 100644
--- a/src/mapleall/maple_ir/include/debug_info.h
+++ b/src/mapleall/maple_ir/include/debug_info.h
@@ -608,6 +608,7 @@ class DebugInfo {
         funcScopeLows(std::less<MIRFunction *>(), m->GetMPAllocator().Adapter()),
         funcScopeHighs(std::less<MIRFunction *>(), m->GetMPAllocator().Adapter()),
         funcScopeIdStatus(std::less<MIRFunction *>(), m->GetMPAllocator().Adapter()),
+        typedefStrIdxDieIdMap(std::less<uint32>(), m->GetMPAllocator().Adapter()),
         strps(std::less<uint32>(), m->GetMPAllocator().Adapter()) {
     /* valid entry starting from index 1 as abbrevid starting from 1 as well */
     abbrevVec.push_back(nullptr);
@@ -803,6 +804,9 @@ class DebugInfo {
     return true;
   }
 
+  // src code type name stridx and aliased maple var
+  DBGDie *GetOrCreateTypeDefDie(GStrIdx stridx, MIRSymbol *var);
+
  private:
   MIRModule *module;
   DBGDie *compUnit;      // root die: compilation unit
@@ -839,6 +843,9 @@ class DebugInfo {
   /* save functions's scope id that has been emited */
   MapleMap<MIRFunction *, std::map<uint32, uint8>> funcScopeIdStatus;
 
+  /* alias type */
+  MapleMap<uint32, uint32> typedefStrIdxDieIdMap;
+
   MapleSet<uint32> strps;
   std::string varPtrPrefix;
 };
diff --git a/src/mapleall/maple_ir/include/mir_scope.h b/src/mapleall/maple_ir/include/mir_scope.h
index dca207e013d747b3b98dbc89ca01bd453402b9f1..38a6f5cc1f59df29ac889096ae89e5adcadc76e0 100644
--- a/src/mapleall/maple_ir/include/mir_scope.h
+++ b/src/mapleall/maple_ir/include/mir_scope.h
@@ -22,8 +22,9 @@
 namespace maple {
 // mapping src variable to mpl variables to display debug info
 struct MIRAliasVars {
-  GStrIdx mplStrIdx;  // maple varialbe name
+  GStrIdx mplStrIdx;      // maple varialbe name
   TyIdx tyIdx;
+  GStrIdx srcTypeStrIdx;  // src type name
   bool isLocal;
   GStrIdx sigStrIdx;
 };
diff --git a/src/mapleall/maple_ir/src/debug_info.cpp b/src/mapleall/maple_ir/src/debug_info.cpp
index c47baa1a8a8b6d7a3f1256258fae55ee4dfb171c..6a33cd7138e9dea9190fb398b45ef0476aa3cd45 100644
--- a/src/mapleall/maple_ir/src/debug_info.cpp
+++ b/src/mapleall/maple_ir/src/debug_info.cpp
@@ -319,8 +319,18 @@ void DebugInfo::AddAliasDies(MapleMap<GStrIdx, MIRAliasVars> &aliasMap) {
       continue;
     }
 
+    // use src code type name if provided
+    DBGDie *typedefDie = nullptr;
+    if (i.second.srcTypeStrIdx.GetIdx()) {
+      typedefDie = GetOrCreateTypeDefDie(i.second.srcTypeStrIdx, var);
+    }
+
     // create alias die using maple var except name
     DBGDie *vdie = CreateVarDie(var, i.first);
+    if (typedefDie) {
+      // use negtive number to indicate DIE id instead of tyidx in normal cases
+      vdie->SetAttr(DW_AT_type, -typedefDie->GetId());
+    }
 
     // link vdie's ExprLoc to mdie's
     vdie->LinkExprLoc(mdie);
@@ -843,6 +853,31 @@ DBGDie *DebugInfo::GetOrCreateTypeDie(MIRType *type) {
   return die;
 }
 
+DBGDie *DebugInfo::GetOrCreateTypeDefDie(GStrIdx stridx, MIRSymbol *var) {
+  uint32 sid = stridx.GetIdx();
+  if (typedefStrIdxDieIdMap.find(sid) != typedefStrIdxDieIdMap.end()) {
+    uint32 id = typedefStrIdxDieIdMap[sid];
+    return idDieMap[id];
+  }
+
+  DBGDie *die = module->GetMemPool()->New<DBGDie>(module, DW_TAG_typedef);
+  compUnit->AddSubVec(die);
+
+  die->AddAttr(DW_AT_name, DW_FORM_strp, sid);
+  die->AddAttr(DW_AT_decl_file, DW_FORM_data1, var->GetSrcPosition().FileNum());
+  die->AddAttr(DW_AT_decl_line, DW_FORM_data1, var->GetSrcPosition().LineNum());
+  die->AddAttr(DW_AT_decl_column, DW_FORM_data1, var->GetSrcPosition().Column());
+
+  MIRType *type = var->GetType();
+  DBGDie *tdie = GetOrCreateTypeDie(type);
+
+  // use negative vaule of Die id
+  die->AddAttr(DW_AT_type, DW_FORM_ref4, -tdie->GetId());
+
+  typedefStrIdxDieIdMap[sid] = die->GetId();
+  return die;
+}
+
 DBGDie *DebugInfo::GetOrCreatePointTypeDie(const MIRPtrType *ptrType) {
   uint32 tid = ptrType->GetTypeIndex().GetIdx();
   if (tyIdxDieIdMap.find(tid) != tyIdxDieIdMap.end()) {
@@ -1242,6 +1277,11 @@ void DebugInfo::FillTypeAttrWithDieId() {
     for (auto at : die->GetAttrVec()) {
       if (at->GetDwAt() == DW_AT_type) {
         uint32 tid = at->GetId();
+        // handle typedef where die id is already used but with nagetive value
+        if ((int)tid < 0) {
+          at->SetId(-(int)tid);
+          break;
+        }
         MIRType *type = GlobalTables::GetTypeTable().GetTypeFromTyIdx(TyIdx(tid));
         if (type) {
           uint32 dieid = tyIdxDieIdMap[tid];
diff --git a/src/mapleall/maple_ir/src/mir_scope.cpp b/src/mapleall/maple_ir/src/mir_scope.cpp
index d675529a6125e73248a13377ed7537c902e240ad..9f0e3e41a60bf53d1851dda4853936bdc02c85ed 100644
--- a/src/mapleall/maple_ir/src/mir_scope.cpp
+++ b/src/mapleall/maple_ir/src/mir_scope.cpp
@@ -124,7 +124,11 @@ void MIRScope::Dump(int32 indent) const {
     LogInfo::MapleLogger() << "ALIAS %" << GlobalTables::GetStrTable().GetStringFromStrIdx(it.first)
                            << ((it.second.isLocal) ? " %" : " $")
                            << GlobalTables::GetStrTable().GetStringFromStrIdx(it.second.mplStrIdx) << " ";
-    GlobalTables::GetTypeTable().GetTypeFromTyIdx(it.second.tyIdx)->Dump(0);
+    if (it.second.tyIdx) {
+      GlobalTables::GetTypeTable().GetTypeFromTyIdx(it.second.tyIdx)->Dump(0);
+    } else {
+      LogInfo::MapleLogger() << "\"" << GlobalTables::GetStrTable().GetStringFromStrIdx(it.second.srcTypeStrIdx) << "\"";
+    }
     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 d4e3d2828aad047224b716b790cd52fe4098c748..7bf9003ae4bf0cf737ab2a9d975e69fc702c1e0a 100644
--- a/src/mapleall/maple_ir/src/parser.cpp
+++ b/src/mapleall/maple_ir/src/parser.cpp
@@ -2526,9 +2526,23 @@ bool MIRParser::ParseOneAlias(GStrIdx &strIdx, MIRAliasVars &aliasVar) {
     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 (!ParseType(tyIdx)) {
+  if (ParseType(tyIdx)) {
+    aliasVar.tyIdx = tyIdx;
+    aliasVar.srcTypeStrIdx = GStrIdx(0);
+  } else if (tk == TK_string) {
+    /* it is original type name from source code */
+    std::string typeName = lexer.GetName();
+    GStrIdx srcTypeStrIdx = GlobalTables::GetStrTable().GetOrCreateStrIdxFromName(typeName);
+
+    aliasVar.tyIdx = TyIdx(0);
+    aliasVar.srcTypeStrIdx = srcTypeStrIdx;
+    lexer.NextToken();
+  } else {
     Error("parseType failed when parsing ALIAS ");
     return false;
   }
@@ -2537,9 +2551,6 @@ bool MIRParser::ParseOneAlias(GStrIdx &strIdx, MIRAliasVars &aliasVar) {
     signStrIdx = GlobalTables::GetStrTable().GetOrCreateStrIdxFromName(lexer.GetName());
     lexer.NextToken();
   }
-  aliasVar.mplStrIdx = mplStrIdx;
-  aliasVar.tyIdx = tyIdx;
-  aliasVar.isLocal = isLocal;
   aliasVar.sigStrIdx = signStrIdx;
   return true;
 }