return OS << "IC_Call";
case IC_User:
return OS << "IC_User";
+ case IC_IntrinsicUser:
+ return OS << "IC_IntrinsicUser";
case IC_None:
return OS << "IC_None";
}
InstructionClass llvm::objcarc::GetFunctionClass(const Function *F) {
Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
- // No arguments.
+ // No (mandatory) arguments.
if (AI == AE)
return StringSwitch<InstructionClass>(F->getName())
.Case("objc_autoreleasePoolPush", IC_AutoreleasepoolPush)
+ .Case("clang.arc.use", IC_IntrinsicUser)
.Default(IC_CallOrUser);
// One argument.
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);
}