From ba83c95b9f8e6bd65405ebff815416fd06b3d4f8 Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Thu, 16 Feb 2012 00:15:02 +0000
Subject: [PATCH] objc-arc: For arc's ivar layout, treat __unsafe_unretained
 ivars as unscanned. // rdar://10832643

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150639 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CGObjCMac.cpp          |  4 ++++
 test/CodeGenObjC/arc-ivar-layout.m | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index 1b95547292..edef754b15 100644
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -1730,6 +1730,10 @@ static Qualifiers::GC GetGCAttrTypeForType(ASTContext &Ctx, QualType FQT) {
   if (FQT.isObjCGCWeak() || FQT.getObjCLifetime() == Qualifiers::OCL_Weak)
     return Qualifiers::Weak;
   
+  // check for __unsafe_unretained
+  if (FQT.getObjCLifetime() == Qualifiers::OCL_ExplicitNone)
+    return Qualifiers::GCNone;
+  
   if (FQT->isObjCObjectPointerType() || FQT->isBlockPointerType())
     return Qualifiers::Strong;
   
diff --git a/test/CodeGenObjC/arc-ivar-layout.m b/test/CodeGenObjC/arc-ivar-layout.m
index 30c90fac9e..7f58a0cad3 100644
--- a/test/CodeGenObjC/arc-ivar-layout.m
+++ b/test/CodeGenObjC/arc-ivar-layout.m
@@ -42,3 +42,14 @@
 // CHECK-LP64: L_OBJC_CLASS_NAME_15:
 // CHECK-LP64-NEXT: .asciz	"\022"
 
+@interface UnsafePerson {
+@public
+    __unsafe_unretained id name;
+    __unsafe_unretained id age;
+    id value;
+}
+@end
+
+@implementation UnsafePerson @end
+// CHECK-LP64: L_OBJC_CLASS_NAME_20:
+// CHECK-LP64-NEXT: .asciz      "!"
-- 
2.50.1