<br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Ryan Taylor</b> <span dir="ltr"><<a href="mailto:ryta1203@gmail.com">ryta1203@gmail.com</a>></span><br>Date: Thu, Nov 10, 2011 at 10:31 AM<br>
Subject: Re: [LLVMdev] Problem getting LoopInfo inside non-LoopPass<br>To: Devang Patel <<a href="mailto:dpatel@apple.com">dpatel@apple.com</a>><br><br><br>I need to iterate bottom up on the nodes, but within that I want to break up BBs within a loop. I could just create a loop pass as another opt and call that, I just thought it'd be easier to get the loop info inside the opt I'm already doing.<div class="HOEnZb">
<div class="h5"><br>
<br><div class="gmail_quote">On Thu, Nov 10, 2011 at 10:25 AM, Devang Patel <span dir="ltr"><<a href="mailto:dpatel@apple.com" target="_blank">dpatel@apple.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">Ryan,<div><br></div><div>Why do your call graph pass need loop info ? Why can't it be a LoopPass ?</div><div>-</div><div>Devang</div><div><div><div><br><div><div>On Nov 10, 2011, at 10:03 AM, Ryan Taylor wrote:</div>
<br><blockquote type="cite">John,<br><br> This did not work. It compiles (isDeclaration was the name of the function) and I passed a reference (&F) (F is a function pointer). I still get the opt load error from the original message (UNREACHABLE exectuted!).<br>
<br>Thanks.<br><br><div class="gmail_quote">On Thu, Nov 10, 2011 at 10:00 AM, Ryan Taylor <span dir="ltr"><<a href="mailto:ryta1203@gmail.com" target="_blank">ryta1203@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
1. Ok will do.<br>2. Ok, will do.<br>3. It's a CallGraphPass. I mentioned this in my first post.<br>4. Yep, I have the header files included, I'm not sure it would compile otherwise (previously). I would get an error like LoopInfo not declared.<br>
<br>I'll try your suggestions, thanks again!<br><br><div class="gmail_quote">On Thu, Nov 10, 2011 at 9:57 AM, John Criswell <span dir="ltr"><<a href="mailto:criswell@illinois.edu" target="_blank">criswell@illinois.edu</a>></span> wrote:<div>
<div><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><div>
On 11/10/11 11:48 AM, R<span>c</span> <span>Add Bcc</span> <span>Edit Subject</span> <span>Attach a file</span> <span>Insert: </span><span>Invitation</span> yan Taylor wrote:
<blockquote type="cite">
John,<br>
<br>
Thanks, this does not compile though, I get this error:<br>
</blockquote>
<br></div>
First, please CC the llvmdev list. That way, others having the same
question can see the conversation, and others on the list can help
correct any errors I make.<br>
:)<div><br>
<br>
<blockquote type="cite"><br>
cdfg_pass.cpp:511:11: error: ‘class llvm::Function’ has no member
named ‘getDeclaration’<br>
</blockquote>
<br></div>
Sorry. I believe the method name is Function::isDeclaration().<br>
<br>
BTW, you should double-check my answers (and other people's answers)
against the LLVM doxygen documentation. This is because:<br>
<br>
1) I often don't take the time to consult the documentation to
ensure I have every detail correct.<br>
2) The LLVM API is fluid, so some details of it may have changed
since I last used a particular feature.<div><br>
<br>
<blockquote type="cite"><br>
Also, when I try to pass the pointer to getAnalysis I get this
error:<br>
<br>
cdfg_pass.cpp:512:41: error: no matching function for call to
‘<unnamed>::CDFGPass::getAnalysis(llvm::Function*&)’<br>
</blockquote>
<br></div>
First, double check that it's a Function * and not a Function &
that is required.<br>
<br>
Second, what type of pass is your pass? Is it a ModulePass, a
FunctionPass, or some other type of pass? For a FunctionPass, no
argument is necessary. For a ModulePass, a Function argument is
necessary. For other types of passes, I do not know: you'll either
have to wait for someone else to respond or just figure it out using
trial and error.<br>
<br>
Third, are you including the header file that provides the
definition of LoopInfo? If not, that could be a problem.<br>
<br>
-- John T.<div><div><br>
<br>
<blockquote type="cite"><br>
Here is the code I'm using:<br>
<br>
Function *F = CGNode->getFunction();<br>
errs()<<"#Get Loop Info\n";<br>
if (!(F->getDeclaration()))<br>
LoopInfo &LI = getAnalysis<LoopInfo>(F);<br>
<br>
<br>
<div class="gmail_quote">On Thu, Nov 10, 2011 at 9:13 AM, John
Criswell <span dir="ltr"><<a href="mailto:criswell@illinois.edu" target="_blank">criswell@illinois.edu</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div> On 11/10/11 11:06 AM, Ryan Taylor wrote:
<blockquote type="cite"> LLVMers,<br>
<br>
I am doing a CallGraphPass but would like to get the
LoopInfo of the functions inside this pass, is this
possible? Currently I have a function inside the
CallGraph struct:<br>
<br>
void getAnalysisUsage(AnalysisUsage &AU) const {<br>
AU.addRequired<LoopInfo>();<br>
AU.addPreserved<LoopInfo>();<br>
}<br>
<br>
And later inside the pass I am calling:<br>
<br>
LoopInfo &LI = getAnalysis<LoopInfo>();<br>
<br>
I have also tried to pass the Function pointer to
getAnalysis but that doesn't work either. With the above
code my error is:<br>
</blockquote>
<br>
</div>
1) You may need to pass a Function pointer or reference if
your pass is not a FunctionPass (e.g., if it is a
ModulePass).<br>
<br>
2) If you have to specify a Function pointer or reference,
you need to make sure that the Function is *not* a
declaration:<br>
<br>
if (!(F->getDeclaration()))<br>
getAnalysis<LoopInfo>(F);<br>
<br>
-- John T.<br>
<br>
<blockquote type="cite">
<div> <br>
UNREACHABLE executed!<br>
0 opt 0x00000000008edc2f<br>
1 opt 0x00000000008edfda<br>
2 libpthread.so.0 0x00007f9c8e69bc60<br>
3 libc.so.6 0x00007f9c8d986d05 gsignal + 53<br>
4 libc.so.6 0x00007f9c8d98aab6 abort + 390<br>
5 opt 0x00000000008da974
llvm::llvm_unreachable_internal(char const*, char
const*, unsigned int) + 356<br>
6 opt 0x000000000087e046<br>
7 opt 0x0000000000882b45
llvm::PMDataManager::add(llvm::Pass*, bool) + 741<br>
8 opt 0x000000000087f413
llvm::PassManager::add(llvm::Pass*) + 259<br>
9 opt 0x00000000004ab9be main + 2174<br>
10 libc.so.6 0x00007f9c8d971eff __libc_start_main
+ 255<br>
11 opt 0x000000000049f5f9<br>
Stack dump:<br>
<br>
<br>
Any help would be appreciated, thanks!<br>
<br>
<br>
<fieldset></fieldset>
<br>
</div>
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</div>
</blockquote>
</div>
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</blockquote>
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</div></div></div>
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