llvm dev - Mar 2012 - [LLVMdev] Is there any way to print assembly code of a function compiled by ExecutionEngine?

Hello!

I'm using LLVM's JIT in my project. Is there any way to view assembly
code of functions it generates without disassembling them from the
memory?

I'm not sure what you mean with "without disassembling them from the
memory". If one can't read the JIT functions from memory, then from
where would we read it?

I wrote a function that can disassemble an arbitrary function using MC on 

 
http://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp

Is this what you're looking for?

If so, then perhaps this would be an useful thing to have in LLVM tree itself.

Jose


----- Original Message -----
> Hello!
> 
> I'm using LLVM's JIT in my project. Is there any way to view
assembly
> code of functions it generates without disassembling them from the
> memory?
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>

> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at
cs.uiuc.edu] On Behalf Of lost
> Subject: [LLVMdev] Is there any way to print assembly code of a function
compiled by ExecutionEngine?
> I'm using LLVM's JIT in my project. Is there any way to view
assembly
> code of functions it generates without disassembling them from the
> memory?
We use the following:

    Context = getGlobalContext();
    m3log = new dt_ostream(sysLogger);
    fm3log = new formatted_raw_ostream(*m3log);
    pMod = new Module("label", Context);
    TD = new TargetData(pMod->getDataLayout());
    pMPasses = new PassManager();
    pMPasses->add(new TargetData(*TD));
    tmc->addPassesToEmitFile(*pMPasses, *fm3log,
TargetMachine::CGFT_AssemblyFile);
    pMPasses->run(*pMod);

(Lots of other bits omitted from the above for simplicity.)

Reference:
http://llvm.org/docs/doxygen/html/classllvm_1_1LLVMTargetMachine.html#a5c437ac9b4d158e38ad4e826dac63914

 - Chuck


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