llvm dev - Apr 2011 - [LLVMdev] LLVM Tutorials

Hi,

Could anyone point me to some simple examples/tutorials for writing
instrumentation transform passes. Essentially adding instructions to basic
blocks, such as print statements, load, add, store. I have tried going
through profiling transforms, and was wondering if there is any better
documented tutorial etc ?

Thanks
Nipun
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On 4/7/11 4:56 PM, Nipun Arora wrote:
> Hi,
>
> Could anyone point me to some simple examples/tutorials for writing 
> instrumentation transform passes. Essentially adding instructions to 
> basic blocks, such as print statements, load, add, store. I have tried 
> going through profiling transforms, and was wondering if there is any 
> better documented tutorial etc ?'
Section 5 of the Programmer's Manual may be helpful: 
http://llvm.org/docs/ProgrammersManual.html#common

Doxygen is a good reference when you need to look up a class.  
Basically, every LLVM instruction and value have their own class:

http://llvm.org/doxygen/

For an example of an extremely simple instrumentation pass, check out 
lib/InsertPoolChecks/LoadStoreChecks.cpp in the SAFECode project 
(http://sva.cs.illinois.edu).  This code adds a run-time check on every 
load and store instruction.  It's almost as simple as a transform gets.

-- John T.
>
>
> Thanks
> Nipun