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<div>Oh sorry that was a typo. it's just getOperand (0). This is in order to get the first operand of getelementptr, which is the base address pointer (%A in your listing). Now as I can see that you want to store ptrA in some data structure; you can just
store the Inst instead as the virtual register ptrA itself represent the instruction.</div>
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<div style="font-size:85%;color:#575757">Sent via the Samsung Galaxy Note® 3, an AT&T 4G LTE smartphone</div>
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-------- Original message --------<br>
From: Gurunath Kadam <gurunath.kadam@gmail.com> <br>
Date: 11/27/2016 8:40 PM (GMT-06:00) <br>
To: "Dasgupta, Sandeep" <sdasgup3@illinois.edu> <br>
Cc: llvm-dev@lists.llvm.org <br>
Subject: Re: [llvm-dev] LLVM Pass for Instructions in Function (error <br>
<br>
<div dir="ltr">Hi Sandeep,
<div><br>
</div>
<div>Thanks.</div>
<div><br>
</div>
<div>One question about:</div>
<div><br>
</div>
<div><span style="font-size:12.8px">Value* AddrPointer = Inst->getIperand(0);</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">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><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">For reference this is the instruction:</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div>
<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); color:rgb(0,0,0)"><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>
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<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">I thought if I just get the return value of the instruction then I can get %ptrA.</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">Can you please elaborate on that?</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">Thanks again.</span></div>
<div><span style="font-size:12.8px"><br>
</span></div>
<div><span style="font-size:12.8px">-Gurunath</span></div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, Nov 27, 2016 at 9:21 PM, Dasgupta, Sandeep <span dir="ltr">
<<a href="mailto:sdasgup3@illinois.edu">sdasgup3@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>
<div>Hi,</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
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<div style="font-size:85%; color:#575757">Sent via the Samsung Galaxy Note® 3, an AT&T 4G LTE smartphone</div>
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-------- Original message --------<br>
From: Gurunath Kadam via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>>
<br>
Date: 11/27/2016 7:49 PM (GMT-06:00) <br>
To: <a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a> <br>
Subject: [llvm-dev] LLVM Pass for Instructions in Function (error <br>
<br>
<div dir="ltr">Hi,</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Please find the embedded code. Also you may follow </div>
<div dir="ltr"><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_docs_ProgrammersManual.html-23iterating-2Dover-2Dthe-2Dinstruction-2Din-2Da-2Dfunction&d=DQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=at_zHdaJ5pMt_A20sKa_JLbvjeXndNos3PveVfgUF0o&m=sgKJsUvkCaaRtnodZerk-FVpqAHHpzk5gPC7VImAiN0&s=E-fekZNyRFShLug4UZybHsL4iibcKy_cmvdRExTT23s&e=" target="_BLANK">http://llvm.org/docs/<wbr>ProgrammersManual.html#<wbr>iterating-over-the-<wbr>instruction-in-a-function</a></div>
<div dir="ltr">-</div>
<div dir="ltr">Sandeep<span class=""><br>
<div><br>
</div>
<div>I have following lines in my code, where I need to iterate over the instructions in the function (not BB):</div>
<div><br>
</div>
</span>
<div><span class="">
<div> for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I){</div>
<div> Instruction *Inst = I;</div>
<div><br>
</div>
</span>
<div>Instruction *Inst = &*I;</div>
<div>
<div> if (Inst -> getOpcode() == Instruction::GetElementPtr){</div>
<div> Value* AddrPointer = Inst->getIperand(0);</div>
</div>
<div> ....</div>
<span class="">
<div><br>
</div>
<div> if (cast<Operator>(Inst) -> getOpcode() == Instruction::GetElementPtr){</div>
<div> Value* AddrPointer = cast<Value>(Inst);</div>
<div> Value* threadId = Inst -> getOperand(1);</div>
<div> unsigned AddrSpace = Inst -> getAddressSpace()</div>
<div> DataStructureForTrace.push_<wbr>back (std:make_tuple(new Value(threadId), AddrSpace, 0, new Value(AddrPointer)));</div>
<div> }</div>
<div> }</div>
</span></div>
<span class="">
<div><br>
</div>
<div>I get following error (there are more, some visible here and some not. for eg, getAddressSpace not being for Instruction class.):</div>
<div><br>
</div>
<div>
<div>error: cannot convert ‘llvm::inst_iterator {aka llvm::InstIterator<llvm::<wbr>SymbolTableList<llvm::<wbr>BasicBlock>, llvm::ilist_iterator<llvm::<wbr>ilist_detail::node_options<<wbr>llvm::BasicBlock, false, false, void>, false, false>, llvm::ilist_iterator<llvm::<wbr>ilist_detail::node_options<<wbr>llvm::Instruction,
false, false, void>, false, false>, llvm::Instruction>}’ to ‘llvm::Instruction*’ in initialization</div>
<div> Instruction *Inst = I;</div>
</div>
<div><br>
</div>
<div>I am not sure about this, as I am following some online code practices.</div>
<div><br>
</div>
<div>Thank you.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Gurunath</div>
</span></div>
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