llvm dev - Jan 2013 - [LLVMdev] How to get the debug information for an LLVM IR type?

Hi,

I am now trying to do some code analysis and need to get the debug 
information of the LLVM IR type encountered in the bitcode.

In detail, given a LLVM Type object, is it possible for me to retrieve 
the corresponding DIType (or MDNode) object? I feel LLVM should be able 
to know everything about a type, if the source file is compiled with the 
-g option by clang. I tried various methods but none of them allows me 
to connect a specific Type with its debug information.

Any one knows how to achieve this? Thank you in advance.

Pei Wang

Hi Pei Wang,

On 19/01/13 22:34, Pei Wang wrote:
> Hi,
>
> I am now trying to do some code analysis and need to get the debug
information
> of the LLVM IR type encountered in the bitcode.
I don't think this is going to work, because many different types in the
original language map to the same LLVM IR type.  For example the C types
"int"
and "unsigned" both become "i32" in LLVM.  Yet
"int" and "unsigned" have
different debug info AFAIK, so which debug info should "i32"  be
mapped too?

Ciao, Duncan.
>
> In detail, given a LLVM Type object, is it possible for me to retrieve the
> corresponding DIType (or MDNode) object? I feel LLVM should be able to know
> everything about a type, if the source file is compiled with the -g option
by
> clang. I tried various methods but none of them allows me to connect a
specific
> Type with its debug information.
>
> Any one knows how to achieve this? Thank you in advance.
>
> Pei Wang
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