<div dir="ltr">Can you tell us a bit more about what you're trying to accomplish?<div><br></div><div>Changes to the IR performed during MachineFunctionPass::doInitialization will likely propagate down through code generation, but at that point what is the purpose of using a MachineFunctionPass? You won't have any analysis or instruction information available until runOnMachineFunction.</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Aug 5, 2013 at 12:00 PM, Anthony Yu <span dir="ltr"><<a href="mailto:swpenim@gmail.com" target="_blank">swpenim@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Micah,<div><br></div><div>Thanks for your help. I will study on that code.</div><div><br></div><div><br>
</div><div>Justin,<br></div><div><br></div><div>Sorry for my misleading word. Local memory in OpenCL is the same as share memory in CUDA. What I mean is share memory, so MachineFrameInfo is not suitable to me.</div>
<div>And I need codegen data, so FunctionPass is also not suitable.</div><div>Anyway, thanks for the suggestion.</div><span class="HOEnZb"><font color="#888888"><div>
<br></div><div>Antony</div><div><br></div></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">2013/8/5 Justin Holewinski <span dir="ltr"><<a href="mailto:justin.holewinski@gmail.com" target="_blank">justin.holewinski@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">If you're running a MachineFunctionPass, then the code has already been lowered to machine instructions and modifying the original IR will most likely not do what you want. You should only be using the IR as an immutable object for reference. If you want to change the IR, I would suggest using a FunctionPass instead of a MachineFunctionPass. Unless you need codegen data.<div>
<br></div><div>At the MachineInstr level, to allocate local memory you can use the MachineFrameInfo interface. This provides methods like CreateStackObject to allocate a new stack slot (which will be lowered to local memory in PTX). The return value of these methods is an integer that represents a FrameIndex. You can treat this as a pointer to your allocated object. You will also need to emit the proper MachineInstr-level loads and stores to access the object.</div>
</div><div class="gmail_extra"><div><div><br><br><div class="gmail_quote">On Mon, Aug 5, 2013 at 11:00 AM, Anthony Yu <span dir="ltr"><<a href="mailto:swpenim@gmail.com" target="_blank">swpenim@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Micah,<div><br></div><div>As you expected, I am trying to create local memory but in the NVPTX backend. It's really not convenient that I can't create local memory in runOnMachineFunction.</div>
<div>Hmm....</div><div>Since I should do it at doInitialization stage, I also need to do some tricks in global variable and AsmPrinter to resize it.</div><div>Did you use the similar way?</div><span><font color="#888888">
<div><br></div><div>Antony</div><div><br></div><div><br></div></font></span></div><div><div><div class="gmail_extra">
<br><br><div class="gmail_quote">2013/8/5 Micah Villmow <span dir="ltr"><<a href="mailto:micah.villmow@smachines.com" target="_blank">micah.villmow@smachines.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Antony,<br>
What are you trying to accomplish in this case? I did something very similar in the AMDIL backend, but it was not the cleanest solution and you are correct it has to be do at doInitialization stage and not at runOnMachineFunction.<br>
Micah<br>
<br>
> -----Original Message-----<br>
> From: <a href="mailto:llvmdev-bounces@cs.uiuc.edu" target="_blank">llvmdev-bounces@cs.uiuc.edu</a> [mailto:<a href="mailto:llvmdev-bounces@cs.uiuc.edu" target="_blank">llvmdev-bounces@cs.uiuc.edu</a>]<br>
> On Behalf Of Antony Yu<br>
> Sent: Monday, August 05, 2013 3:41 AM<br>
> To: <a href="mailto:llvmdev@cs.uiuc.edu" target="_blank">llvmdev@cs.uiuc.edu</a><br>
> Subject: [LLVMdev] Can I add GlobalVariable in MachineFunctionPass ?<br>
><br>
> Hello,<br>
><br>
> I want to add a global variable of arrayType in my MachineFunctionPass.<br>
> However, I only get const Module from<br>
> MachineFunction.getMMI().getModule().<br>
> I can't add any global variable to a const Module.<br>
> Another way is to add a global variable in doInitialization in my<br>
> MachineFunctionPass, but I can't determine the size of my arrayType for<br>
> global variable in doInitialization.<br>
><br>
> Is there any suggestion that can help me achieve this?<br>
><br>
> Thanks in advance.<br>
> Antony Yu<br>
><br>
><br>
<span><font color="#888888">><br>
> --<br>
> View this message in context: <a href="http://llvm.1065342.n5.nabble.com/Can-I-add-" target="_blank">http://llvm.1065342.n5.nabble.com/Can-I-add-</a><br>
> GlobalVariable-in-MachineFunctionPass-tp60165.html<br>
> Sent from the LLVM - Dev mailing list archive at Nabble.com.<br>
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<br></blockquote></div><br><br clear="all"><div><br></div></div></div><span><font color="#888888">-- <br><br><div>Thanks,</div><div><br></div><div>Justin Holewinski</div>
</font></span></div>
</blockquote></div><br></div>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><br><div>Thanks,</div><div><br></div><div>Justin Holewinski</div>
</div>