Thanks for the answer John. I checked the llvm-extract and it works, but my concern is if the output of the extract could be saved as .ll instead of .bc. Sort of human-readable format so that I can parse it. Otherwise, it is better to parse the foo.ll file right away instead of using the extract tool. Please correct me if I am wrong. Thanks, -Amir On Tue, Oct 21, 2014 at 7:02 PM, John Criswell <jtcriswel at gmail.com> wrote:> 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 > > > _______________________________________________ > LLVM Developers mailing listLLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.eduhttp://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > > > > -- > John Criswell > Assistant Professor > Department of Computer Science, University of Rochesterhttp://www.cs.rochester.edu/u/criswell > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20141021/4c7f3ed8/attachment.html>
You can use llvm-dis to turn .bc files into .ll files. Am 22.10.2014 01:44 schrieb "Amir H. Ashouri" <amirhossein.ashouri at gmail.com>:> Thanks for the answer John. > > I checked the llvm-extract and it works, but my concern is if the output > of the extract could be saved as .ll instead of .bc. Sort of human-readable > format so that I can parse it. Otherwise, it is better to parse the foo.ll > file right away instead of using the extract tool. > > Please correct me if I am wrong. > > Thanks, > > -Amir > > On Tue, Oct 21, 2014 at 7:02 PM, John Criswell <jtcriswel at gmail.com> > wrote: > >> 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 >> >> >> _______________________________________________ >> LLVM Developers mailing listLLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.eduhttp://lists.cs.uiuc.edu/mailman/listinfo/llvmdev >> >> >> >> -- >> John Criswell >> Assistant Professor >> Department of Computer Science, University of Rochesterhttp://www.cs.rochester.edu/u/criswell >> >> > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20141022/d717612c/attachment.html>
Thanks Markus. Having llvm-as to turn the extracted function.bc file to .ll caused an error saying: *llvm-as-3.4: function_bc:1:1: error: expected top-level entity* *BC! #AI29bEBB2I (some more binary)* This error is just the same error that I received while using llvm-extract on a .c file (not .bc or .ll). Do I have to include other things in the command ? I mean generating a function.ll without anything as header, Module ID, etc might be wrong. right ? -Amir On Tue, Oct 21, 2014 at 7:51 PM, Markus Timpl <tima0900 at googlemail.com> wrote:> You can use llvm-dis to turn .bc files into .ll files. > Am 22.10.2014 01:44 schrieb "Amir H. Ashouri" < > amirhossein.ashouri at gmail.com>: > > Thanks for the answer John. >> >> I checked the llvm-extract and it works, but my concern is if the output >> of the extract could be saved as .ll instead of .bc. Sort of human-readable >> format so that I can parse it. Otherwise, it is better to parse the foo.ll >> file right away instead of using the extract tool. >> >> Please correct me if I am wrong. >> >> Thanks, >> >> -Amir >> >> On Tue, Oct 21, 2014 at 7:02 PM, John Criswell <jtcriswel at gmail.com> >> wrote: >> >>> 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 >>> >>> >>> _______________________________________________ >>> LLVM Developers mailing listLLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.eduhttp://lists.cs.uiuc.edu/mailman/listinfo/llvmdev >>> >>> >>> >>> -- >>> John Criswell >>> Assistant Professor >>> Department of Computer Science, University of Rochesterhttp://www.cs.rochester.edu/u/criswell >>> >>> >> >> _______________________________________________ >> LLVM Developers mailing list >> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu >> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev >> >>-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20141021/5cf06398/attachment.html>