<div dir="ltr"><span style="font-size:12.8px">Hi,</span><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">I was trying to create a new  <b>Store</b> instruction and inserting it to LLVM IR (.ll) file. I found the following constructor in LLVM Manual:</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><table style="font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif;font-size:13px;line-height:16.9px;white-space:nowrap;font-weight:bold;margin-left:6px;color:rgb(37,53,85)"><tbody><tr></tr><tr><td style="margin-left:6px"><a href="http://llvm.org/docs/doxygen/html/classllvm_1_1StoreInst.html#aa2a72f9a51b317f5b4ab8695adf59025" target="_blank" style="color:rgb(70,101,162)">StoreInst::StoreInst</a></td><td>(</td><td><a href="http://llvm.org/docs/doxygen/html/classllvm_1_1Value.html" target="_blank" style="color:rgb(70,101,162)">Value</a> * </td><td style="color:rgb(96,32,32)">Val,</td></tr><tr><td style="text-align:right"></td><td></td><td><a href="http://llvm.org/docs/doxygen/html/classllvm_1_1Value.html" target="_blank" style="color:rgb(70,101,162)">Value</a> * </td><td style="color:rgb(96,32,32)">Ptr,</td></tr><tr><td style="text-align:right"></td><td></td><td><a href="http://llvm.org/docs/doxygen/html/classllvm_1_1Instruction.html" target="_blank" style="color:rgb(70,101,162)">Instruction</a> * </td><td style="color:rgb(96,32,32)">InsertBefore </td></tr><tr><td></td><td>)<br><br></td></tr></tbody></table></div><div style="font-size:12.8px">I thought of using this. I don't know the meaning of the constructors arguments. What all values should be passed for creating a new <b>Store </b>Instruction (with an <i>example) </i>?</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">How to insert this to LLVM IR? ( I saw the code snippet in LLVM Programming manual, I couldn't understand it. Any examples on doing the same? )</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">I tried to delete an instruction using:</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">                        i->eraseFromParent();</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">But it throws the following error/exception:</div><div style="font-size:12.8px"><br></div><div><div><span style="font-size:12.8px"><b>opt -load /home/mtech2/Documents/llvm/build/Debug+Asserts/lib/CSE.so -CSE <test.ll> /dev/null</b></span></div><div><span style="font-size:12.8px"><b>opt: /home/mtech2/Documents/llvm/llvm/include/llvm/Support/Casting.h:81: static bool llvm::isa_impl_cl<To, From*>::doit(const From*) [with To = llvm::Instruction; >From = llvm::Instruction]: Assertion `Val && "isa<> used on a null pointer"' failed.</b></span></div><div><span style="font-size:12.8px"><b>#0 0x29635a5 llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/mtech2/Documents/llvm/llvm/lib/Support/Unix/Signals.inc:405:0</b></span></div><div><span style="font-size:12.8px"><b>#1 0x29638ba PrintStackTraceSignalHandler(void*) /home/mtech2/Documents/llvm/llvm/lib/Support/Unix/Signals.inc:463:0</b></span></div><div><span style="font-size:12.8px"><b>#2 0x2961eb9 llvm::sys::RunSignalHandlers() /home/mtech2/Documents/llvm/llvm/lib/Support/Signals.cpp:34:0</b></span></div><div><span style="font-size:12.8px"><b>#3 0x29623b1 SignalHandler(int) /home/mtech2/Documents/llvm/llvm/lib/Support/Unix/Signals.inc:211:0</b></span></div><div><span style="font-size:12.8px"><b>#4 0x7f190977a340 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x10340)</b></span></div><div><span style="font-size:12.8px"><b>#5 0x7f1908715cc9 gsignal /build/buildd/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0</b></span></div><div><span style="font-size:12.8px"><b>#6 0x7f19087190d8 abort /build/buildd/eglibc-2.19/stdlib/abort.c:91:0</b></span></div><div><span style="font-size:12.8px"><b>#7 0x7f190870eb86 __assert_fail_base /build/buildd/eglibc-2.19/assert/assert.c:92:0</b></span></div><div><span style="font-size:12.8px"><b>#8 0x7f190870ec32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32)</b></span></div><div><span style="font-size:12.8px"><b>#9 0x7f19084d9970 llvm::isa_impl_cl<llvm::Instruction, llvm::Instruction*>::doit(llvm::Instruction const*) /home/mtech2/Documents/llvm/llvm/include/llvm/Support/Casting.h:82:0</b></span></div><div><span style="font-size:12.8px"><b>#10 0x7f19084d9450 llvm::isa_impl_wrap<llvm::Instruction, llvm::Instruction*, llvm::Instruction*>::doit(llvm::Instruction* const&) /home/mtech2/Documents/llvm/llvm/include/llvm/Support/Casting.h:123:0</b></span></div><div><span style="font-size:12.8px"><b>#11 0x7f19084d89e2 llvm::isa_impl_wrap<llvm::Instruction, llvm::ilist_iterator<llvm::Instruction> const, llvm::Instruction*>::doit(llvm::ilist_iterator<llvm::Instruction> const&) /home/mtech2/Documents/llvm/llvm/include/llvm/Support/Casting.h:115:0</b></span></div><div><span style="font-size:12.8px"><b>#12 0x7f19084d8371 bool llvm::isa<llvm::Instruction, llvm::ilist_iterator<llvm::Instruction> >(llvm::ilist_iterator<llvm::Instruction> const&) /home/mtech2/Documents/llvm/llvm/include/llvm/Support/Casting.h:135:0</b></span></div><div><span style="font-size:12.8px"><b>#13 0x7f19084d7ba1 llvm::cast_retty<llvm::Instruction, llvm::ilist_iterator<llvm::Instruction> >::ret_type llvm::cast<llvm::Instruction, llvm::ilist_iterator<llvm::Instruction> >(llvm::ilist_iterator<llvm::Instruction>&) /home/mtech2/Documents/llvm/llvm/include/llvm/Support/Casting.h:230:0</b></span></div><div><span style="font-size:12.8px"><b>#14 0x7f19084d73fd (anonymous namespace)::CSE::runOnFunction(llvm::Function&) /home/mtech2/Documents/llvm/llvm/lib/Transforms/CSE/CSE.cpp:48:0</b></span></div><div><span style="font-size:12.8px"><b>#15 0x288fd1c llvm::FPPassManager::runOnFunction(llvm::Function&) /home/mtech2/Documents/llvm/llvm/lib/IR/LegacyPassManager.cpp:1528:0</b></span></div><div><span style="font-size:12.8px"><b>#16 0x288feaf llvm::FPPassManager::runOnModule(llvm::Module&) /home/mtech2/Documents/llvm/llvm/lib/IR/LegacyPassManager.cpp:1549:0</b></span></div><div><span style="font-size:12.8px"><b>#17 0x289024a (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/mtech2/Documents/llvm/llvm/lib/IR/LegacyPassManager.cpp:1605:0</b></span></div><div><span style="font-size:12.8px"><b>#18 0x28909bb llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/mtech2/Documents/llvm/llvm/lib/IR/LegacyPassManager.cpp:1708:0</b></span></div><div><span style="font-size:12.8px"><b>#19 0x2890bfb llvm::legacy::PassManager::run(llvm::Module&) /home/mtech2/Documents/llvm/llvm/lib/IR/LegacyPassManager.cpp:1740:0</b></span></div><div><span style="font-size:12.8px"><b>#20 0xee3bd2 main /home/mtech2/Documents/llvm/llvm/tools/opt/opt.cpp:602:0</b></span></div><div><span style="font-size:12.8px"><b>#21 0x7f1908700ec5 __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:321:0</b></span></div><div><span style="font-size:12.8px"><b>#22 0xec1739 _start (/home/mtech2/Documents/llvm/build/Debug+Asserts/bin/opt+0xec1739)</b></span></div><div><span style="font-size:12.8px"><b>Stack dump:</b></span></div><div><span style="font-size:12.8px"><b>0.<span class="" style="white-space:pre">      </span>Program arguments: opt -load /home/mtech2/Documents/llvm/build/Debug+Asserts/lib/CSE.so -CSE </b></span></div><div><span style="font-size:12.8px"><b>1.<span class="" style="white-space:pre">    </span>Running pass 'Function Pass Manager' on module '<stdin>'.</b></span></div><div><span style="font-size:12.8px"><b>2.<span class="" style="white-space:pre">   </span>Running pass 'Print Instructions' on function '@main'</b></span></div><div><span style="font-size:12.8px"><b>Aborted (core dumped)</b></span></div><div style="font-size:12.8px"><br></div></div><div style="font-size:12.8px">Any help will be appreciated.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">- Ansar K.A.</div></div>