1 files changed, 4 insertions, 1 deletions
diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index 8393d43..a5ec4c8 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -1467,7 +1467,10 @@ public:
   bool stopAutoInit();
 
   /// Print the postfix for externalized static variable or kernels for single
-  /// source offloading languages CUDA and HIP.
+  /// source offloading languages CUDA and HIP. The unique postfix is created
+  /// using either the CUID argument, or the file's UniqueID and active macros.
+  /// The fallback method without a CUID requires that the offloading toolchain
+  /// does not define separate macros via the -cc1 options.
   void printPostfixForExternalizedDecl(llvm::raw_ostream &OS,
                                        const Decl *D) const;