[llvm-commits] [llvm] r84113 - in /llvm/trunk: include/llvm/Metadata.h lib/VMCore/Metadata.cpp
Devang Patel
dpatel at apple.com
Wed Oct 14 11:53:25 PDT 2009
On Oct 14, 2009, at 11:48 AM, Nick Lewycky wrote:
> 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
>> =
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>> =====================================================================
>> --- 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
>> =
>> =
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>> =====================================================================
>> --- 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 was replaced or deleted.
> If it's "!metadata null" we want to push a null metadata onto the
> target instruction, right?
I am not sure.
-
Devang
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