diff --git a/clang/lib/CodeGen/CGDebugInfo.h b/clang/lib/CodeGen/CGDebugInfo.h
--- a/clang/lib/CodeGen/CGDebugInfo.h
+++ b/clang/lib/CodeGen/CGDebugInfo.h
@@ -493,6 +493,9 @@
   /// Emit information about an external variable.
   void EmitExternalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
 
+  /// Emit information about global alias.
+  void EmitGlobalAlias(const VarDecl *Decl);
+
   /// Emit C++ using directive.
   void EmitUsingDirective(const UsingDirectiveDecl &UD);
 
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -4945,6 +4945,20 @@
   Var->addDebugInfo(GVE);
 }
 
+void CGDebugInfo::EmitGlobalAlias(const VarDecl *D) {
+  if (!CGM.getCodeGenOpts().hasReducedDebugInfo())
+    return;
+
+  llvm::DIFile *Unit = getOrCreateFile(D->getLocation());
+  StringRef Name = D->getName();
+  llvm::DIType *Ty = getOrCreateType(D->getType(), Unit);
+  llvm::DIScope *DContext = getDeclContextDescriptor(D);
+  auto Loc = getLineNumber(D->getLocation());
+  DBuilder.createGlobalVariableExpression(
+      DContext, Name, StringRef(), Unit, Loc, Ty,
+      !D->hasExternalFormalLinkage());
+}
+
 llvm::DIScope *CGDebugInfo::getCurrentContextDescriptor(const Decl *D) {
   if (!LexicalBlockStack.empty())
     return LexicalBlockStack.back();
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -4927,6 +4927,12 @@
       setTLSMode(GA, *VD);
 
   SetCommonAttributes(GD, GA);
+
+  // Emit global alias debug information.
+  if (const auto *VD = dyn_cast<VarDecl>(D)) {
+    if (CGDebugInfo *DI = getModuleDebugInfo())
+      DI->EmitGlobalAlias(VD);
+  }
 }
 
 void CodeGenModule::emitIFuncDefinition(GlobalDecl GD) {
diff --git a/clang/test/CodeGen/debug-info-alias.c b/clang/test/CodeGen/debug-info-alias.c
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGen/debug-info-alias.c
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -emit-llvm -debug-info-kind=limited -triple x86_64-linux-unknown %s -o - | FileCheck %s
+
+// CHECK: !DIGlobalVariable(name: "newname"
+
+int oldname = 1;
+extern int newname __attribute__((alias("oldname")));