Fix up various builtin declaration of objc_msgSend families

to match those foung in objc.h an avoid spurious warnings. 
// rdar://12489098


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171492 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 36 insertions, 1 deletions

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 1e23ef7995..426e67cc79 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -633,7 +633,7 @@ ASTContext::ASTContext(LangOptions& LOpts, SourceManager &SM,
     Comments(SM), CommentsLoaded(false),
     CommentCommandTraits(BumpAlloc),
     LastSDM(0, 0),
-    UniqueBlockByRefTypeID(0) 
+    UniqueBlockByRefTypeID(0)
 {
   if (size_reserve > 0) Types.reserve(size_reserve);
   TUDecl = TranslationUnitDecl::Create(*this);
@@ -889,6 +889,8 @@ void ASTContext::InitBuiltinTypes(const TargetInfo &Target) {
                        SignedCharTy : BoolTy);
   
   ObjCConstantStringType = QualType();
+  
+  ObjCSuperType = QualType();
 
   // void * type
   VoidPtrTy = getPointerType(VoidTy);
@@ -4294,6 +4296,16 @@ QualType ASTContext::getCFConstantStringType() const {
   return getTagDeclType(CFConstantStringTypeDecl);
 }
 
+QualType ASTContext::getObjCSuperType() const {
+  if (ObjCSuperType.isNull()) {
+    RecordDecl *ObjCSuperTypeDecl  =
+      CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get("objc_super"));
+    TUDecl->addDecl(ObjCSuperTypeDecl);
+    ObjCSuperType = getTagDeclType(ObjCSuperTypeDecl);
+  }
+  return ObjCSuperType;
+}
+
 void ASTContext::setCFConstantStringType(QualType T) {
   const RecordType *Rec = T->getAs<RecordType>();
   assert(Rec && "Invalid CFConstantStringType");
@@ -7205,6 +7217,9 @@ static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context,
   case 'H':
     Type = Context.getObjCSelType();
     break;
+  case 'M':
+    Type = Context.getObjCSuperType();
+    break;
   case 'a':
     Type = Context.getBuiltinVaListType();
     assert(!Type.isNull() && "builtin va list type not initialized!");
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 61791b2aa5..3bbb9a4cfd 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -1464,6 +1464,24 @@ Scope *Sema::getNonFieldDeclScope(Scope *S) {
   return S;
 }
 
+/// \brief Looks up the declaration of "struct objc_super" and
+/// saves it for later use in building builtin declaration of
+/// objc_msgSendSuper and objc_msgSendSuper_stret. If no such
+/// pre-existing declaration exists no action takes place.
+static void LookupPredefedObjCSuperType(Sema &ThisSema, Scope *S,
+                                        IdentifierInfo *II) {
+  if (!II->isStr("objc_msgSendSuper"))
+    return;
+  ASTContext &Context = ThisSema.Context;
+    
+  LookupResult Result(ThisSema, &Context.Idents.get("objc_super"),
+                      SourceLocation(), Sema::LookupTagName);
+  ThisSema.LookupName(Result, S);
+  if (Result.getResultKind() == LookupResult::Found)
+    if (const TagDecl *TD = Result.getAsSingle<TagDecl>())
+      Context.setObjCSuperType(Context.getTagDeclType(TD));
+}
+
 /// LazilyCreateBuiltin - The specified Builtin-ID was first used at
 /// file scope.  lazily create a decl for it. ForRedeclaration is true
 /// if we're creating this built-in in anticipation of redeclaring the
@@ -1471,6 +1489,8 @@ Scope *Sema::getNonFieldDeclScope(Scope *S) {
 NamedDecl *Sema::LazilyCreateBuiltin(IdentifierInfo *II, unsigned bid,
                                      Scope *S, bool ForRedeclaration,
                                      SourceLocation Loc) {
+  LookupPredefedObjCSuperType(*this, S, II);
+  
   Builtin::ID BID = (Builtin::ID)bid;
 
   ASTContext::GetBuiltinTypeError Error;