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On 2/8/12 12:11 PM, tarun agrawal wrote:
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cite="mid:CAMY5+L79OhwMwGC=Fwdf5Tjjjj7Zn4deh8xY4YdOP1vNsroD4g@mail.gmail.com"
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Just to be clear, I have to add a function name printf in the
module with no body. And I can call the function. This will
automatically call the printf function which is defined in the
library.<br>
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<br>
Yes. That is correct.<br>
<br>
You also need to link in the native code library that defines printf
after code generation, but since printf is in libc, you are probably
doing that step already.<br>
<br>
-- John T.<br>
<br>
<blockquote
cite="mid:CAMY5+L79OhwMwGC=Fwdf5Tjjjj7Zn4deh8xY4YdOP1vNsroD4g@mail.gmail.com"
type="cite"><br>
Tarun Agrawal<br>
<br>
<div class="gmail_quote">On Wed, Feb 8, 2012 at 11:34 PM, John
Criswell <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:criswell@illinois.edu">criswell@illinois.edu</a>></span>
wrote:<br>
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<div class="im"> On 2/8/12 11:55 AM, tarun agrawal wrote:
<blockquote type="cite"> Hi,<br>
<br>
I am trying to insert a instruction for printf or cout.
My aim is to print a integer and a string value using
that instruction, which are already there in the code. <br>
but I am not able to understand how to do it. Any help
would be great help.<br>
</blockquote>
<br>
</div>
You want to insert a call instruction that calls the printf
function. You'll need to insert a Function for printf (with
no body) if no printf function exists within the LLVM module
you're transforming.<br>
<br>
So, the code will look something like:<br>
<br>
Function * F = M.getOrInsertFunction ("printf", ...);<br>
CallInst::Create (F, ...);<br>
<br>
Be sure to look at the doxygen docs for exact method names
and which parameters go where; I've skipped over such
details above.<br>
<br>
-- John T.<br>
<br>
<blockquote type="cite">
<div class="im"> <br>
<br>
<br>
Thanks and Regards,<br>
Tarun Agrawal<br>
<br>
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