[LLVMdev] Metadata

[Devang Patel]

>> >> But that does suggest a consideration: if you're using metadata at
>> >> the LLVM IR level, it may make sense to use metadata at the codegen
>> >> level too, to avoid this confusion.
>> >
>> > There doesn't appear to be any way to do this right now.  Is it planned?
>>
>> Today, we use metadata to represent debug info at LLVM IR level as
>> well at the codegen level.
>
> So what's the trick?  I don't see anything about metadata in the SelectionDAG
> stuff.

1) See DebugLoc.h. Now debug location tracker keeps track of metadata
nodes. In 2.6 release debug location tracker tracked 4 element tuple.

2) See how X86 lowers @llvm.dbg.declare intrinsic into DBG_VALUE MI.
-
Devang