[llvm] Add LLVM_GSL_POINTER to llvm::function_ref. (PR #120699)

[Haojian Wu via llvm-commits]

https://github.com/hokein created https://github.com/llvm/llvm-project/pull/120699

This can enable clang to detect dangling assignment issues, see #120698.

>From 04115c7a08bb5fa291f3ef4342bd74d9e5deff64 Mon Sep 17 00:00:00 2001
From: Haojian Wu <hokein.wu at gmail.com>
Date: Fri, 20 Dec 2024 10:02:10 +0100
Subject: [PATCH] Add LLVM_GSL_POINTER to llvm::function_ref.

---
 llvm/include/llvm/ADT/STLFunctionalExtras.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/include/llvm/ADT/STLFunctionalExtras.h b/llvm/include/llvm/ADT/STLFunctionalExtras.h
index 3b9d40959d7142..f1ebb581996563 100644
--- a/llvm/include/llvm/ADT/STLFunctionalExtras.h
+++ b/llvm/include/llvm/ADT/STLFunctionalExtras.h
@@ -37,7 +37,7 @@ namespace llvm {
 template<typename Fn> class function_ref;
 
 template<typename Ret, typename ...Params>
-class function_ref<Ret(Params...)> {
+class LLVM_GSL_POINTER function_ref<Ret(Params...)> {
   Ret (*callback)(intptr_t callable, Params ...params) = nullptr;
   intptr_t callable;