[LLVMdev] Fetching the functions in C files (original) (raw)

John Criswell jtcriswel at gmail.com
Tue Oct 21 16:02:46 PDT 2014


On 10/21/14, 5:27 PM, Amir H. Ashouri wrote:

Hello Everyone,

Just subscribed to the mailing list. I was wondering how I am going to fetch each functions of a specific source code file (c/c++) using the LLVM framework. For instance, I would like to apply certain passes using llvm-opt on certain functions not the whole file. I would appreciate any hints or idea leading me about the starting point.

You might be able to use the llvm-extract tool to pull out the functions you want into a separate bitcode file and then use opt to optimize them. You'd then need to create a second bitcode file that contains the remaining functions (using llvm-extract again). Finally, you'd take the optimized bitcode file and the bitcode file containing the other functions and link them together using clang and libLTO or the llvm-link tool.

Regards,

John Criswell

Regards, -Amir


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-- John Criswell Assistant Professor Department of Computer Science, University of Rochester http://www.cs.rochester.edu/u/criswell

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