[llvm-dev] Handling of metadata in llvm::CloneModule

[Mehdi Amini via llvm-dev]

Hi Sergei,

The issue of importing only the minimum amount metadata is really non-trivial. You may want to have a look at: 

http://reviews.llvm.org/D16440: [ThinLTO] Link in only necessary DICompileUnit operands


— 
Mehdi


> On Jan 26, 2016, at 9:14 AM, Sergei Larin via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> 
> Sorry if this has been discussed already... 
> 
> I am trying to understand whether there is an underlying reason why llvm::CloneModule takes argument function ShouldCloneDefinition to discriminate on objects being cloned, but blindly copies all named metadata...?
> 
> In my case this results in debug nodes that are creating uses/relocations for global objects that were _not_ copied per ShouldCloneDefinition...
> 
> Before I jump head on into unfamiliar code, I would like to understand why this wheel was not invented in the first place :)
> 
> Thanks.
> 
> Sergei Larin
> 
> P.S. Also, if this does need fixing, please suggest the proper strategy for it... Thanks.
> 
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