> On Dec 4, 2015, at 9:14 AM, Teresa Johnson <tejohn...@google.com> wrote:
> 
> tejohnson added inline comments.
> 
> ================
> Comment at: lib/CodeGen/CodeGenAction.cpp:822
> @@ +821,3 @@
> +      TheModule = std::move(Combined);
> +    }
> +
> ----------------
> joker.eph wrote:
>> tejohnson wrote:
>>> joker.eph wrote:
>>>> tejohnson wrote:
>>>>> joker.eph wrote:
>>>>>> Could we refactor this in a helper in llvm?
>>>>> I can create a new Linker interface that takes the index path, builds the 
>>>>> index, does the link and returns the ErrorOr index.
>>>> I was thinking about a free function that would be something like: 
>>>> `std::unique_ptr<Module> 
>>>> llvm::renameModuleForThinLTO(std::unique_ptr<Module> &M, const 
>>>> FunctionInfoIndex &Index);`
>>>> 
>>> We also need to get the Index back so that it can be passed down to 
>>> EmitBackendOutput below (to get it on the pass manager builder). So what I 
>>> was thinking was create the Combined Module unique_ptr here and pass it in 
>>> (as we do currently for LinkModules), and return the 
>>> std::unique_ptr<FunctionInfoIndex> .
>> You pass a reference to the index, you already have it.
> Oh I see, you are just talking about the Combined module creation and 
> LinkModules call.
> 
> I was thinking you meant refactor out the getFunctionIndexForFile + 
> LinkModules. Just doing the module creation and LinkModules is easier, will 
> do that.
> 

Yeah the idea is to abstract away this step that I want us to be able to do in 
place in some future :)

Thanks,

— 
Mehdi

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