[llvm-dev] Retrieving DbgInfoIntrinsics for a given value

[Hongbin Zheng via llvm-dev]

Thanks, this is very useful

On Mon, Nov 27, 2017 at 3:21 PM, Reid Kleckner <rnk at google.com> wrote:

> Check out llvm::findDbgValues:
>
> void llvm::findDbgValues(SmallVectorImpl<DbgValueInst *> &DbgValues,
> Value *V) {
>   if (auto *L = LocalAsMetadata::getIfExists(V))
>     if (auto *MDV = MetadataAsValue::getIfExists(V->getContext(), L))
>       for (User *U : MDV->users())
>         if (DbgValueInst *DVI = dyn_cast<DbgValueInst>(U))
>           DbgValues.push_back(DVI);
> }
>
> Basically, there is a DenseMap of all values used by debug intrinsics in
> the LLVM context.
>
> On Wed, Nov 22, 2017 at 1:29 PM, Hongbin Zheng via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hi LLVM,
>>
>> If I have an llvm value "<16 x float> addrspace(1)* %in", and in the LLVM
>> IR, there is a @llvm.dbg.value like:
>>
>> call void @llvm.dbg.value(metadata <16 x float> addrspace(1)* %in, i64 0,
>> metadata !216, metadata !28), !dbg !217
>>
>> How I can retrieve this @llvm.dbg.value when I have "%in"?
>>
>> Since Metadata is not a part of the uselist anymore, is there some way
>> rather than iterate over every instructions in the function to get this
>> @llvm.dbg.value?
>>
>> Thanks
>> Hongbin
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>
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