[LLVMdev] function calls

John Criswell criswell at illinois.edu
Tue Oct 9 11:24:28 PDT 2012

On 10/9/12 1:19 PM, apala guha wrote:
> Hi,
> I am seeing some strange function calls in the LLVM IR, such as, 'call 
> llvm.lifetime.start'. What are these functions and why are they 
> appearing in the IR?

These are LLVM intrinsics that provide information to the optimization 
passes.  See the Language reference manual 
(http://llvm.org/docs/LangRef.html) for a description of what these 
intrinsics do.

-- John T.

> Thanks.
> -Apala
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