}
llvm_unreachable("covered switch isn't covered?");
}
+
+bool llvm::objcarc::CanDecrementRefCount(ARCInstKind Kind) {
+ switch (Kind) {
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::AutoreleaseRV:
+ case ARCInstKind::NoopCast:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ case ARCInstKind::IntrinsicUser:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ return false;
+
+ // The cases below are conservative.
+
+ // RetainBlock can result in user defined copy constructors being called
+ // implying releases may occur.
+ case ARCInstKind::RetainBlock:
+ case ARCInstKind::Release:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::LoadWeakRetained:
+ case ARCInstKind::StoreWeak:
+ case ARCInstKind::InitWeak:
+ case ARCInstKind::LoadWeak:
+ case ARCInstKind::MoveWeak:
+ case ARCInstKind::CopyWeak:
+ case ARCInstKind::DestroyWeak:
+ case ARCInstKind::StoreStrong:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ return true;
+ }
+
+ llvm_unreachable("covered switch isn't covered?");
+}