[PATCH] D111419: [Demangle] Add support for D types back referencing

Mon Feb 28 10:32:46 PST 2022

ljmf00 added inline comments.

================
Comment at: llvm/lib/Demangle/DLangDemangle.cpp:312
+  if (Backref == nullptr)
+    return nullptr;
+
----------------
dblaikie wrote:
> RKSimon wrote:
> > @ljmf00 coverity is warning that it looks like we fail to restore LastBackref if we early-return here - is that correct?
> Out of curiosity, do you have the full/actual Coverity error? Is it detecting based on the "Save" prefix that the variable is intended to save/restore?
> 
> I'm guessing on this codepath we're probably on an error path anyway, and it doesn't matter if it's restored? 
> 
> But @ljmf00 could you confirm that that's the case and/or that this path (a LastBackref value, and a bail-out through this early return) is tested/behaving as desired?
I don't see the need to restore such variable, as this will abort the demangler anyway. parse functions doesn't usually restore the demangler context, only decode functions, if needed. Can you clarify why this triggered your attention to this? I also requested access to coverity, is that possible?

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111419/new/

https://reviews.llvm.org/D111419