[Sema][ObjC] Infer availability of +new from availability of -init.

When defined in NSObject, +new will call -init. If -init has been marked
unavailable, diagnose uses of +new.

rdar://18335828

Differential revision: https://reviews.llvm.org/D51189

llvm-svn: 341874

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index fe48e47ff4f..45510da0b1a 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -206,7 +206,8 @@ void Sema::MaybeSuggestAddingStaticToDecl(const FunctionDecl *Cur) {
 bool Sema::DiagnoseUseOfDecl(NamedDecl *D, ArrayRef<SourceLocation> Locs,
                              const ObjCInterfaceDecl *UnknownObjCClass,
                              bool ObjCPropertyAccess,
-                             bool AvoidPartialAvailabilityChecks) {
+                             bool AvoidPartialAvailabilityChecks,
+                             ObjCInterfaceDecl *ClassReceiver) {
   SourceLocation Loc = Locs.front();
   if (getLangOpts().CPlusPlus && isa<FunctionDecl>(D)) {
     // If there were any diagnostics suppressed by template argument deduction,
@@ -292,7 +293,7 @@ bool Sema::DiagnoseUseOfDecl(NamedDecl *D, ArrayRef<SourceLocation> Locs,
   }
 
   DiagnoseAvailabilityOfDecl(D, Locs, UnknownObjCClass, ObjCPropertyAccess,
-                             AvoidPartialAvailabilityChecks);
+                             AvoidPartialAvailabilityChecks, ClassReceiver);
 
   DiagnoseUnusedOfDecl(*this, D, Loc);