+
+/// \brief Test if the given class is a kind of user.
+bool llvm::objcarc::IsUser(ARCInstKind Class) {
+ switch (Class) {
+ case ARCInstKind::User:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::IntrinsicUser:
+ return true;
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::RetainBlock:
+ case ARCInstKind::Release:
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::AutoreleaseRV:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::NoopCast:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ 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::Call:
+ case ARCInstKind::None:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}
+
+/// \brief Test if the given class is objc_retain or equivalent.
+bool llvm::objcarc::IsRetain(ARCInstKind Class) {
+ switch (Class) {
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ return true;
+ // I believe we treat retain block as not a retain since it can copy its
+ // block.
+ case ARCInstKind::RetainBlock:
+ case ARCInstKind::Release:
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::AutoreleaseRV:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::NoopCast:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ 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::IntrinsicUser:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}
+
+/// \brief Test if the given class is objc_autorelease or equivalent.
+bool llvm::objcarc::IsAutorelease(ARCInstKind Class) {
+ switch (Class) {
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::AutoreleaseRV:
+ return true;
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::RetainBlock:
+ case ARCInstKind::Release:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::NoopCast:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ 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::IntrinsicUser:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}
+
+/// \brief Test if the given class represents instructions which return their
+/// argument verbatim.
+bool llvm::objcarc::IsForwarding(ARCInstKind Class) {
+ switch (Class) {
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::AutoreleaseRV:
+ case ARCInstKind::NoopCast:
+ return true;
+ case ARCInstKind::RetainBlock:
+ case ARCInstKind::Release:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ 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::IntrinsicUser:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}
+
+/// \brief Test if the given class represents instructions which do nothing if
+/// passed a null pointer.
+bool llvm::objcarc::IsNoopOnNull(ARCInstKind Class) {
+ switch (Class) {
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::Release:
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::AutoreleaseRV:
+ case ARCInstKind::RetainBlock:
+ return true;
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ 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::IntrinsicUser:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ case ARCInstKind::NoopCast:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}
+
+/// \brief Test if the given class represents instructions which are always safe
+/// to mark with the "tail" keyword.
+bool llvm::objcarc::IsAlwaysTail(ARCInstKind Class) {
+ // ARCInstKind::RetainBlock may be given a stack argument.
+ switch (Class) {
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::AutoreleaseRV:
+ return true;
+ case ARCInstKind::Release:
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::RetainBlock:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ 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::IntrinsicUser:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ case ARCInstKind::NoopCast:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}
+
+/// \brief Test if the given class represents instructions which are never safe
+/// to mark with the "tail" keyword.
+bool llvm::objcarc::IsNeverTail(ARCInstKind Class) {
+ /// It is never safe to tail call objc_autorelease since by tail calling
+ /// objc_autorelease: fast autoreleasing causing our object to be potentially
+ /// reclaimed from the autorelease pool which violates the semantics of
+ /// __autoreleasing types in ARC.
+ switch (Class) {
+ case ARCInstKind::Autorelease:
+ return true;
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::AutoreleaseRV:
+ case ARCInstKind::Release:
+ case ARCInstKind::RetainBlock:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ 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::IntrinsicUser:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ case ARCInstKind::NoopCast:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}
+
+/// \brief Test if the given class represents instructions which are always safe
+/// to mark with the nounwind attribute.
+bool llvm::objcarc::IsNoThrow(ARCInstKind Class) {
+ // objc_retainBlock is not nounwind because it calls user copy constructors
+ // which could theoretically throw.
+ switch (Class) {
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::Release:
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::AutoreleaseRV:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::AutoreleasepoolPop:
+ return true;
+ case ARCInstKind::RetainBlock:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ 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::IntrinsicUser:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ case ARCInstKind::NoopCast:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}
+
+/// Test whether the given instruction can autorelease any pointer or cause an
+/// autoreleasepool pop.
+///
+/// This means that it *could* interrupt the RV optimization.
+bool llvm::objcarc::CanInterruptRV(ARCInstKind Class) {
+ switch (Class) {
+ case ARCInstKind::AutoreleasepoolPop:
+ case ARCInstKind::CallOrUser:
+ case ARCInstKind::Call:
+ case ARCInstKind::Autorelease:
+ case ARCInstKind::AutoreleaseRV:
+ case ARCInstKind::FusedRetainAutorelease:
+ case ARCInstKind::FusedRetainAutoreleaseRV:
+ return true;
+ case ARCInstKind::Retain:
+ case ARCInstKind::RetainRV:
+ case ARCInstKind::Release:
+ case ARCInstKind::AutoreleasepoolPush:
+ case ARCInstKind::RetainBlock:
+ 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::IntrinsicUser:
+ case ARCInstKind::User:
+ case ARCInstKind::None:
+ case ARCInstKind::NoopCast:
+ return false;
+ }
+ llvm_unreachable("covered switch isn't covered?");
+}