[llvm-commits] [llvm] r84113 - in /llvm/trunk: include/llvm/Metadata.h lib/VMCore/Metadata.cpp

[Nick Lewycky]

Devang Patel wrote:
> Author: dpatel
> Date: Wed Oct 14 12:02:49 2009
> New Revision: 84113
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=84113&view=rev
> Log:
> Add copyMD to copy metadata from one instruction to another instruction.
> 
> Modified:
>     llvm/trunk/include/llvm/Metadata.h
>     llvm/trunk/lib/VMCore/Metadata.cpp
> 
> Modified: llvm/trunk/include/llvm/Metadata.h
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Metadata.h?rev=84113&r1=84112&r2=84113&view=diff
> 
> ==============================================================================
> --- llvm/trunk/include/llvm/Metadata.h (original)
> +++ llvm/trunk/include/llvm/Metadata.h Wed Oct 14 12:02:49 2009
> @@ -351,6 +351,10 @@
>    /// removeMDs - Remove all metadata attached with an instruction.
>    void removeMDs(const Instruction *Inst);
>  
> +  /// copyMD - If metadata is attached with Instruction In1 then attach
> +  /// the same metadata to In2.
> +  void copyMD(Instruction *In1, Instruction *In2);
> +
>    /// getHandlerNames - Get handler names. This is used by bitcode
>    /// writer.
>    const StringMap<unsigned> *getHandlerNames();
> 
> Modified: llvm/trunk/lib/VMCore/Metadata.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Metadata.cpp?rev=84113&r1=84112&r2=84113&view=diff
> 
> ==============================================================================
> --- llvm/trunk/lib/VMCore/Metadata.cpp (original)
> +++ llvm/trunk/lib/VMCore/Metadata.cpp Wed Oct 14 12:02:49 2009
> @@ -359,6 +359,20 @@
>    MetadataStore.erase(I);
>  }
>  
> +/// copyMD - If metadata is attached with Instruction In1 then attach
> +/// the same metadata to In2.
> +void MetadataContext::copyMD(Instruction *In1, Instruction *In2) {
> +  assert (In1 && In2 && "Invalid instruction!");
> +   MDStoreTy::iterator I = MetadataStore.find(In1);
> +  if (I == MetadataStore.end())
> +    return;
> +
> +  MDMapTy &In1Info = I->second;
> +  MDMapTy In2Info;
> +  for (MDMapTy::iterator I = In1Info.begin(), E = In1Info.end(); I != E; ++I)
> +    if (MDNode *MD = dyn_cast_or_null<MDNode>(I->second))

When would this be null? If it's "!metadata null" we want to push a null 
metadata onto the target instruction, right?

Nick

> +      addMD(I->first, MD, In2);
> +}
>  
>  /// getMD - Get the metadata of given kind attached with an Instruction.
>  /// If the metadata is not found then return 0.
> @@ -416,3 +430,4 @@
>    // FIXME : Give custom handlers a chance to override this.
>    ValueIsCloned(I1, I2);
>  }
> +
> 
> 
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