[LLVMdev] Basic doubt related to Module::iterator

[John Criswell]

ambika wrote:
> Hi,
>
> Yeah I found that it is running LLVM's functions. The functions that are 
> running are:
>
> main
> llvm.dbg.func.start
> llvm.dbg.stoppoint
> scanf
> llvm.dbg.region.end
>
> But I dont want all the functions to be called as I am using Dominator 
> Trees and whenever I the statement
>
>   DominatorTree &DT = getAnalysis<DominatorTree>(F);
>
> is encountered by functions other than main, it gives error.
>
> What can I do?
>   

You should first check to see if the function is an external function 
before calling getAnalysis<DominatorTree>() on it:

if (!(F->isDeclaration())) {
    DominatorTree & DT = getAnalysis<DominatorTree>(F);
    ...
}

-- John T.

>
> regards,
> Ambika
>
> Trevor Harmon wrote:
>   
>> On May 24, 2010, at 12:58 PM, ambika wrote:
>>
>>     
>>> I run this for different files, each having one function each ie main(),
>>> but for one it loops  twice, and for another it loops thrice.
>>> for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
>>>       
>> It might be iterating over the LLVM intrinsic functions as well as the 
>> user-defined functions. Try printing out the function names on each 
>> iteration and see what you get.
>>
>> Trevor
>>
>>     
>
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