steven_wu added a comment.

In D141625#4060460 <https://reviews.llvm.org/D141625#4060460>, @dblaikie wrote:

> In D141625#4059486 <https://reviews.llvm.org/D141625#4059486>, @steven_wu 
> wrote:
>
>> @dblaikie Do we have any bots running reverse iteration?
>
> Hmm, not that I can see/find at a quick glance, which is unfortunate. @mgrang 
> Are you still working on LLVM/have any knowledge of reverse iteration testing 
> being done? (@colinl - looks like maybe you're a Code Aurora person, perhaps 
> you've got some more recent context for this?)

At another look, it is not very easy to write a test that checks a strict 
ordering of the serialization. The only tool I know that can dump the module is 
`llvm-bcanalyzer` but everything in the module will appear in the order of 
anonymous decl number order. You have to decode the Decls and Types to know if 
they actually appear in the source ordering. A diff test probably makes a lot 
more sense here.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D141625/new/

https://reviews.llvm.org/D141625

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