diff options
Diffstat (limited to 'llvm/lib/Analysis')
| -rw-r--r-- | llvm/lib/Analysis/ObjCARCInstKind.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/ObjCARCInstKind.cpp b/llvm/lib/Analysis/ObjCARCInstKind.cpp index 59994bae8be..0e96c6e975c 100644 --- a/llvm/lib/Analysis/ObjCARCInstKind.cpp +++ b/llvm/lib/Analysis/ObjCARCInstKind.cpp @@ -481,6 +481,41 @@ bool llvm::objcarc::IsNoopOnNull(ARCInstKind Class) { llvm_unreachable("covered switch isn't covered?"); } +/// Test if the given class represents instructions which do nothing if +/// passed a global variable. +bool llvm::objcarc::IsNoopOnGlobal(ARCInstKind Class) { + switch (Class) { + case ARCInstKind::Retain: + case ARCInstKind::RetainRV: + case ARCInstKind::ClaimRV: + case ARCInstKind::Release: + case ARCInstKind::Autorelease: + case ARCInstKind::AutoreleaseRV: + case ARCInstKind::RetainBlock: + case ARCInstKind::FusedRetainAutorelease: + case ARCInstKind::FusedRetainAutoreleaseRV: + return true; + 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::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 if the given class represents instructions which are always safe /// to mark with the "tail" keyword. bool llvm::objcarc::IsAlwaysTail(ARCInstKind Class) { |
