return StringSwitch<InstructionClass>(F->getName())
.Case("objc_moveWeak", IC_MoveWeak)
.Case("objc_copyWeak", IC_CopyWeak)
+ // Ignore annotation calls. This is important to stop the
+ // optimizer from treating annotations as uses which would
+ // make the state of the pointers they are attempting to
+ // elucidate to be incorrect.
+ .Case("llvm.arc.annotation.topdown.bbstart", IC_None)
+ .Case("llvm.arc.annotation.topdown.bbend", IC_None)
+ .Case("llvm.arc.annotation.bottomup.bbstart", IC_None)
+ .Case("llvm.arc.annotation.bottomup.bbend", IC_None)
.Default(IC_CallOrUser);
}