[llvm] [Asan] Add TTI hook to provide memory reference information of target intrinsic. (PR #133361)

[Hank Chang via llvm-commits]

HankChang736 wrote:

> Having two nearly identical functions for the target to implement is unacceptable. Find a way to combine the interface

Thanks for the feedback!

You're right — having two separate but nearly identical target interfaces is not ideal. What if try it with default argument?

```cpp
bool TargetTransformInfo::getTgtMemIntrinsic(IntrinsicInst *Inst,
                                             MemIntrinsicInfo &Info,
                                             SmallVectorImpl<unsigned> *Interesting = nullptr);
```
The `Interesting` vector is optional and only populated when needed.
Let me know if this direction looks better to you — happy to adjust further if needed.


https://github.com/llvm/llvm-project/pull/133361