From ab5db2ea742284d8964885eba5d7239215df64dd Mon Sep 17 00:00:00 2001
From: Steve Merritt <steve.merritt@intel.com>
Date: Mon, 28 Jul 2025 09:05:57 -0700
Subject: [PATCH] [clang][DebugInfo] Don't emit VTable debug symbols for
 -gline-tables-only.

The -gline-tables-only option emits minimal debug info for functions,
files and line numbers while omitting variables, parameters and most type
information.  VTable debug symbols are emitted to facilitate a debugger's
ability to perform automatic type promotion on variables and parameters.
With variables and parameters being omitted, the VTable symbols are
unnecessary.
---
 clang/lib/CodeGen/CGDebugInfo.cpp                      | 2 ++
 clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index a371b6755f74d..6d428f0b7fef5 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -2641,6 +2641,8 @@ void CGDebugInfo::emitVTableSymbol(llvm::GlobalVariable *VTable,
                                    const CXXRecordDecl *RD) {
   if (!CGM.getTarget().getCXXABI().isItaniumFamily())
     return;
+  if (DebugKind <= llvm::codegenoptions::DebugLineTablesOnly)
+    return;
 
   ASTContext &Context = CGM.getContext();
   StringRef SymbolName = "_vtable$";
diff --git a/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp b/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
index 9b86a49d69f5b..192169b0ab798 100644
--- a/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
+++ b/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
@@ -14,9 +14,11 @@ class E : public C {
   // CHECK-NOT: DW_TAG_reference type
   void x(const D& d);
 };
+// CHECK-NOT: DW_TAG_structure_type
 struct F {
   enum X { };
   void func(X);
+  // CHECK-NOT: DW_TAG_member
   virtual ~F();
 };
 F::~F() {