[LLVMdev] Pulling line number/file/path information from DbgStopPointInst instructions

[Sarah Thompson]

Hmm... if I do a print() on the result of getFileName(), I get

	i8 * getelementptr ([9 x i8]* @.str, i32 0, i32 0)

back, but if I try to dyn_cast this to GetElementPtrInst it fails  
(returning null), so presumably I'm seeing a  
GetElementPtrConstantExpr... so how can I get at that constant i8  
array without casting to a GetElementPtrInst, and with  
GetElementPtrConstantExpr being inaccessible to user code?

[s]


On Apr 29, 2009, at 6:29 PM, Bill Wendling wrote:

> On Wed, Apr 29, 2009 at 6:04 PM, Sarah Thompson <sarah at findatlantis.com 
> > wrote:
>> Hi folks,
>>
>> I had some code that used to work fine in earlier versions of LLVM,
>> but is now failing. I have some code that expands DbgStopPointInst
>> failing to get the file name and path back, though it is still
>> correctly getting line numbers. If you happen to have a code fragment
>> that is known to work, it would be much appreciated.
>>
> Hi Sarah,
>
> I'm not sure if this will help you out, but take a look at how
> DwarfWriter::getOrCreateSourceID is used. Unfortunately, I don't see
> how to get the file name from a DbgStopPointInstr right offhand.
> Things in the CodeGen/AsmPrinter/DwarfWriter.cpp file have changed
> quite a bit in recent months...
>
> -bw
>
>> What it used to work was calling getFileName()->getNameStr() on the
>> DbgStopPointInst, which returned a std::string, but in LLVM 2.5 the
>> code compiles, but that string is empty. Any clues?
>>
>> [s]
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