[objcxx] Fix `std::addressof` for `id`.

Differential Revision: https://reviews.llvm.org/D129384

clang/lib/Sema/SemaChecking.cpp

@@ -2413,7 +2413,7 @@ Sema::CheckBuiltinFunctionCall(FunctionDecl *FDecl, unsigned BuiltinID,
     bool ReturnsPointer = BuiltinID == Builtin::BIaddressof ||
                           BuiltinID == Builtin::BI__addressof;
     if (!(Param->isReferenceType() &&
-          (ReturnsPointer ? Result->isPointerType()
+          (ReturnsPointer ? Result->isAnyPointerType()
                           : Result->isReferenceType()) &&
           Context.hasSameUnqualifiedType(Param->getPointeeType(),
                                          Result->getPointeeType()))) {

clang/test/SemaObjCXX/unsupported-signature-std-addressof-id.mm

@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -fsyntax-only -fobjc-arc -fobjc-runtime-has-weak -verify %s
+// expected-no-diagnostics
+
+namespace std {
+    template <class T>
+    T* addressof(T&);
+}
+
+void f(id obj) {
+    (void)std::addressof(*obj);
+}