<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Nov 27, 2016, at 6:40 PM, Gurunath Kadam via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi Sandeep,<div class=""><br class=""></div><div class="">Thanks.</div><div class=""><br class=""></div><div class="">One question about:</div><div class=""><br class=""></div><div class=""><span style="font-size:12.8px" class="">Value* AddrPointer = Inst->getIperand(0);</span></div><div class=""><span style="font-size:12.8px" class=""><br class=""></span></div><div class=""><span style="font-size:12.8px" class="">So this works for LVALUE(S) i.e. in my case pointer on LHS of '='. I cannot find anything online about getloperand online.</span></div><div class=""><span style="font-size:12.8px" class=""><br class=""></span></div><div class=""><span style="font-size:12.8px" class="">For reference this is the instruction:</span></div><div class=""><span style="font-size:12.8px" class=""><br class=""></span></div><div class=""><pre style="overflow-x: auto; overflow-y: hidden; font-family: consolas, 'deja vu sans mono', 'bitstream vera sans mono', monospace; font-size: 0.95em; line-height: 15.96px; padding: 0.5em; border: 1px solid rgb(204, 204, 204); background-color: rgb(248, 248, 248);" class=""><span class="m_8470975868108907910gmail-nv" style="color:rgb(187,96,213)">%ptrA</span> <span class="m_8470975868108907910gmail-p">=</span> <span class="m_8470975868108907910gmail-k" style="color:rgb(0,112,32);font-weight:bold">getelementptr</span> <span class="m_8470975868108907910gmail-kt" style="color:rgb(144,32,0)">float</span><span class="m_8470975868108907910gmail-p">,</span> <span class="m_8470975868108907910gmail-kt" style="color:rgb(144,32,0)">float</span> <span class="m_8470975868108907910gmail-k" style="color:rgb(0,112,32);font-weight:bold">addrspace</span><span class="m_8470975868108907910gmail-p">(</span><span class="m_8470975868108907910gmail-m" style="color:rgb(64,160,112)">1</span><span class="m_8470975868108907910gmail-p">)*</span> <span class="m_8470975868108907910gmail-nv" style="color:rgb(187,96,213)">%A</span><span class="m_8470975868108907910gmail-p">,</span> <span class="m_8470975868108907910gmail-k" style="color:rgb(0,112,32);font-weight:bold">i32</span> <span class="m_8470975868108907910gmail-nv" style="color:rgb(187,96,213)">%id</span></pre></div><div class=""><span style="font-size:12.8px" class=""><br class=""></span></div><div class=""><span style="font-size:12.8px" class="">I thought if I just get the return value of the instruction then I can get %ptrA.</span></div></div></div></blockquote><div><br class=""></div><div><br class=""></div><div>%ptrA is not the return value of the instruction, it *is* the instruction itself.</div><div><br class=""></div><div>— </div><div>Mehdi</div><div><br class=""></div><div><br class=""></div><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class=""><span style="font-size:12.8px" class=""><br class=""></span></div><div class=""><span style="font-size:12.8px" class="">Can you please elaborate on that?</span></div><div class=""><span style="font-size:12.8px" class=""><br class=""></span></div><div class=""><span style="font-size:12.8px" class="">Thanks again.</span></div><div class=""><span style="font-size:12.8px" class=""><br class=""></span></div><div class=""><span style="font-size:12.8px" class="">-Gurunath</span></div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Sun, Nov 27, 2016 at 9:21 PM, Dasgupta, Sandeep <span dir="ltr" class=""><<a href="mailto:sdasgup3@illinois.edu" target="_blank" class="">sdasgup3@illinois.edu</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="">
<div class="">Hi,</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
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</div>
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</div>
<div id="m_4357665685075327223composer_signature" class="">
<div style="font-size:85%;color:#575757" class="">Sent via the Samsung Galaxy Note® 3, an AT&T 4G LTE smartphone</div>
</div>
<br class="">
<br class="">
-------- Original message --------<br class="">
From: Gurunath Kadam via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank" class="">llvm-dev@lists.llvm.org</a>> <br class="">
Date: 11/27/2016 7:49 PM (GMT-06:00) <br class="">
To: <a href="mailto:llvm-dev@lists.llvm.org" target="_blank" class="">llvm-dev@lists.llvm.org</a> <br class="">
Subject: [llvm-dev] LLVM Pass for Instructions in Function (error <br class="">
<br class="">
<div dir="ltr" class="">Hi,</div>
<div dir="ltr" class=""><br class="">
</div>
<div dir="ltr" class="">Please find the embedded code. Also you may follow </div>
<div dir="ltr" class=""><a href="http://llvm.org/docs/ProgrammersManual.html#iterating-over-the-instruction-in-a-function" target="_blank" class="">http://llvm.org/docs/<wbr class="">ProgrammersManual.html#<wbr class="">iterating-over-the-<wbr class="">instruction-in-a-function</a></div>
<div dir="ltr" class="">-</div>
<div dir="ltr" class="">Sandeep<span class=""><br class="">
<div class=""><br class="">
</div>
<div class="">I have following lines in my code, where I need to iterate over the instructions in the function (not BB):</div>
<div class=""><br class="">
</div>
</span><div class=""><span class="">
<div class=""> for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I){</div>
<div class=""> Instruction *Inst = I;</div>
<div class=""><br class="">
</div>
</span><div class="">Instruction *Inst = &*I;</div>
<div class="">
<div class=""> if (Inst -> getOpcode() == Instruction::GetElementPtr){</div>
<div class=""> Value* AddrPointer = Inst->getIperand(0);</div>
</div>
<div class=""> ....</div><span class="">
<div class=""><br class="">
</div>
<div class=""> if (cast<Operator>(Inst) -> getOpcode() == Instruction::GetElementPtr){</div>
<div class=""> Value* AddrPointer = cast<Value>(Inst);</div>
<div class=""> Value* threadId = Inst -> getOperand(1);</div>
<div class=""> unsigned AddrSpace = Inst -> getAddressSpace()</div>
<div class=""> DataStructureForTrace.push_<wbr class="">back (std:make_tuple(new Value(threadId), AddrSpace, 0, new Value(AddrPointer)));</div>
<div class=""> }</div>
<div class=""> }</div>
</span></div><span class="">
<div class=""><br class="">
</div>
<div class="">I get following error (there are more, some visible here and some not. for eg, getAddressSpace not being for Instruction class.):</div>
<div class=""><br class="">
</div>
<div class="">
<div class="">error: cannot convert ‘llvm::inst_iterator {aka llvm::InstIterator<llvm::<wbr class="">SymbolTableList<llvm::<wbr class="">BasicBlock>, llvm::ilist_iterator<llvm::<wbr class="">ilist_detail::node_options<<wbr class="">llvm::BasicBlock, false, false, void>, false, false>, llvm::ilist_iterator<llvm::<wbr class="">ilist_detail::node_options<<wbr class="">llvm::Instruction,
false, false, void>, false, false>, llvm::Instruction>}’ to ‘llvm::Instruction*’ in initialization</div>
<div class=""> Instruction *Inst = I;</div>
</div>
<div class=""><br class="">
</div>
<div class="">I am not sure about this, as I am following some online code practices.</div>
<div class=""><br class="">
</div>
<div class="">Thank you.</div>
<div class=""><br class="">
</div>
<div class="">Regards,</div>
<div class="">Gurunath</div>
</span></div>
</div>
</blockquote></div><br class=""></div>
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