Thanks John for the reply. Ya, I took a similar approach. I cloned the entire <br>function using CloneFunctionInto() in Cloning.h. <br><br>Now, I am facing a new Problem. I am not able to understand the concept of <br>ValueToValueMap. I am trying to figure it out by testing it. But I am getting <br>
errors like "Referring to an argument in another function!". I am not able to get<br>good examples nor good documentation on ValueToValueMap. Can you point <br>me in the right direction ?<br><br><br><div class="gmail_quote">
On Sun, May 8, 2011 at 5:06 AM, John Criswell <span dir="ltr"><<a href="mailto:criswell@illinois.edu">criswell@illinois.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000"><div class="im">
On 5/7/11 2:01 PM, Gokul Ramaswamy wrote:
<blockquote type="cite">
Hello All,<br>
<br>
I want to change the return type of a function in a Pass(in
a module Pass). I dont want to change any of the arguments of that
function.<br>
Assume that, I can handle the returning values properly inside the
function. Please guide me how to do this ?<br clear="all">
</blockquote>
<br></div>
You need to do the following steps:<br>
<br>
1) Create a new function with the desired function type.<br>
2) Clone the body of the old function into the new function<br>
3) Find all calls calling the old function and replace them with
calls to the new function.<br>
<br>
This is necessary because a function cannot have its type changed
once it has been created.<br>
<br>
Automatic Pool Allocation adds parameters to functions (which is
similar to what you need to do). See MakeFunctionClone() in
poolalloc/lib/PoolAllocate/PoolAllocate.cpp in the poolalloc
project. Use<br>
<br>
svn co <a href="http://llvm.org/svn/llvm-project/poolalloc/trunk" target="_blank">http://llvm.org/svn/llvm-project/poolalloc/trunk</a> poolalloc<br>
<br>
... to get a copy from SVN.<br>
<br>
-- John T.<br>
<br>
<blockquote type="cite"><div class="im">
<br>
<br>
-- <br>
Regards,<br>
Gokul Ramaswamy,<br>
Graduate Student,<br>
Department of CSE, IIT Bombay<br>
<a href="http://www.cse.iitb.ac.in/%7Eramaswamy" target="_blank">http://www.cse.iitb.ac.in/~ramaswamy</a><br>
</div><pre><fieldset></fieldset>
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</pre>
</blockquote>
<br>
</div>
</blockquote></div><br><br clear="all"><br>-- <br>Regards,<br>Gokul Ramaswamy,<br>Graduate Student,<br>Department of CSE, IIT Bombay<br><a href="http://www.cse.iitb.ac.in/%7Eramaswamy" target="_blank">http://www.cse.iitb.ac.in/~ramaswamy</a><br>