From a42286486c85402c65f9d30df17e6b1b037a6ade Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Fri, 5 Mar 2010 22:42:55 +0000
Subject: [PATCH] Patch to build qualifier on objective-c pointer types. Fixes
 radar 7626768.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97847 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/AST/ASTContext.h         | 3 ++-
 lib/AST/ASTContext.cpp                 | 8 +++++---
 lib/Sema/SemaType.cpp                  | 3 ++-
 test/SemaObjC/check-dup-objc-decls-1.m | 5 +++++
 4 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/include/clang/AST/ASTContext.h b/include/clang/AST/ASTContext.h
index 6767f52f4d..0838a3d0eb 100644
--- a/include/clang/AST/ASTContext.h
+++ b/include/clang/AST/ASTContext.h
@@ -621,7 +621,8 @@ public:
   /// given interface decl and the conforming protocol list.
   QualType getObjCObjectPointerType(QualType OIT,
                                     ObjCProtocolDecl **ProtocolList = 0,
-                                    unsigned NumProtocols = 0);
+                                    unsigned NumProtocols = 0,
+                                    unsigned Quals = 0);
 
   /// getTypeOfType - GCC extension.
   QualType getTypeOfExprType(Expr *e);
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index e091bf10b6..d8c1c84858 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -2240,14 +2240,16 @@ static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols,
 /// the given interface decl and the conforming protocol list.
 QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT,
                                               ObjCProtocolDecl **Protocols,
-                                              unsigned NumProtocols) {
+                                              unsigned NumProtocols,
+                                              unsigned Quals) {
   llvm::FoldingSetNodeID ID;
   ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols);
+  Qualifiers Qs = Qualifiers::fromCVRMask(Quals);
 
   void *InsertPos = 0;
   if (ObjCObjectPointerType *QT =
               ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos))
-    return QualType(QT, 0);
+    return getQualifiedType(QualType(QT, 0), Qs);
 
   // Sort the protocol list alphabetically to canonicalize it.
   QualType Canonical;
@@ -2282,7 +2284,7 @@ QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT,
 
   Types.push_back(QType);
   ObjCObjectPointerTypes.InsertNode(QType, InsertPos);
-  return QualType(QType, 0);
+  return getQualifiedType(QualType(QType, 0), Qs);
 }
 
 /// getObjCInterfaceType - Return the unique reference to the type for the
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index 2fb5c84ac9..a79853afdc 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -1034,7 +1034,8 @@ QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S,
         const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>();
         T = Context.getObjCObjectPointerType(T,
                                          (ObjCProtocolDecl **)OIT->qual_begin(),
-                                         OIT->getNumProtocols());
+                                         OIT->getNumProtocols(),
+                                         DeclType.Ptr.TypeQuals);
         break;
       }
       T = BuildPointerType(T, DeclType.Ptr.TypeQuals, DeclType.Loc, Name);
diff --git a/test/SemaObjC/check-dup-objc-decls-1.m b/test/SemaObjC/check-dup-objc-decls-1.m
index 1f80293588..8dde777f74 100644
--- a/test/SemaObjC/check-dup-objc-decls-1.m
+++ b/test/SemaObjC/check-dup-objc-decls-1.m
@@ -37,3 +37,8 @@ void Gorf() // expected-error {{redefinition of 'Gorf' as different kind of symb
 
 @interface A(Cat)<P> @end // expected-note {{previous definition is here}}
 @interface A(Cat)<Q> @end // expected-warning {{duplicate definition of category 'Cat' on interface 'A'}}
+
+// rdar 7626768
+@class NSString;
+NSString * TestBaz;  // expected-note {{previous definition is here}}
+NSString * const TestBaz;  // expected-error {{redefinition of 'TestBaz' with a different type}}
-- 
2.40.0