From be26fb110e781565e7a77d9fff9be44b761c5975 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B9=85=E6=97=A5?= <609079623@qq.com>
Date: Tue, 17 Jun 2025 18:04:35 +0800
Subject: [PATCH] =?UTF-8?q?=E6=A0=87=E9=A2=98:=20Fix=20PAC=20tag=20inconsi?=
 =?UTF-8?q?stency=20issue?=
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描述:
编译工程中，对于同一个class，同时存在引用头文件包含类声明和仅前置声明两种方式时，PAC标记行为不一致。前置声明引用的会标记PAC属性，导致引用符号不一致问题。

Issue: 【PAC】When header files reference classes and forward declarations reference classes, the PAC attribute judgment is inconsistent

测试:
1. 场景难以构造

Signed-off-by: zhangshouxu <zhangshouxu@huawei.com>
---
 clang/lib/AST/ItaniumMangle.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index e3f91d6624b9..b49cf99ddefe 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -1500,8 +1500,7 @@ void CXXNameMangler::mangleUnqualifiedName(
     if (const CXXRecordDecl *A = dyn_cast<const CXXRecordDecl>(GD.getDecl()))
     {
       // todo: if class info is signed, then we must mangle also the name of non polymorphic classes.
-      isPac = langOptions.PointerAuthMangleClass
-        && (!A->hasDefinition() || A->isPolymorphic()) && !A->isNoPac();
+      isPac = langOptions.PointerAuthMangleClass && !A->isNoPac();
     }
   }
   if (pauth_func)
-- 
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