[LLVMdev] Generating DFG or CDFG from C code

[janarbek]

Hi Andrew,
Thanks for the response. That helps a lot.

So that means I have to implement a pass, right ? Sorry for dumb question. I just started LLVM today.


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--- On Thu, 6/30/11, Andrew Trick <atrick at apple.com> wrote:

From: Andrew Trick <atrick at apple.com>
Subject: Re: [LLVMdev] Generating DFG or CDFG from C code
To: "janarbek" <canarbekmatay at yahoo.com>
Cc: llvmdev at cs.uiuc.edu
Date: Thursday, June 30, 2011, 10:51 PM


On Jun 30, 2011, at 10:05 PM, janarbek wrote:

Hi All,
I am reposting my question again since i think my question was not clear enough. 
I am wondering is it possible to generate Control Data Flow Graph from C using LLVM? or is it possible to get web-like structure of C code using llvm /

Thanks in advance,
Any comment suggestion would be appreciated.

Jan Ma.

 
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--- On Thu, 6/30/11, janarbek <canarbekmatay at yahoo.com> wrote:

From: janarbek <canarbekmatay at yahoo.com>
Subject: Generating DFG or CDFG from C code
To: llvmdev at cs.uiuc.edu
Date: Thursday, June 30, 2011, 11:55 AM

Hi All,
I am new to LLVM. I want to generate a Dataflow graph or Control Dataflow graph from C code using LLVM. I have no idea how to do it in LLVM. I tried to use analysis and transform passes such as "-dot-cfg" but it doesn't give what I want. I want to generate a node for each operation in C code. 
Thanks in advance.JM.
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I don't know if anyone has already done this, but some important pieces are there. See Dataflow.h and GraphWriter.h.
I think you'll run into a problem though because the value graph isn't fully connected. You have to walk the instruction stream looking for "roots".
-Andy
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