<div dir="ltr">Hi,<br><br>There are a lot of things going on here, but given this:<br><br>>
The crash occurs with the pointers 1 & 4 which are from AS1 and AS2 respectively.<br><br>and the trace, I'm not sure how that can happen. `groupChecks()` will only try to group pointers that<br>are on the same alias set (because it will only try to group pointers that are in the same Eq class<div>in DepCands, which if you see its construction in `processMemAccesses()`, won't put two pointers<br>from different alias sets in the same Eq Class because _theoretically_, two such pointers can't<br>share an underlying object).<br><br>Do maybe have a simplified but complete IR ? Is that a possibility?<br><br>Kind regards,<br>Stefanos Baziotis</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Στις Κυρ, 26 Ιουλ 2020 στις 1:06 μ.μ., ο/η Devadasan, Christudasan via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>> έγραψε:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div>
<p class="MsoNormal">Hello,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I Have a question related to the RT check on pointers during Loop Access Analysis pass.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">There is a testcase with loop code that consist of 4 different memory operations referring two global objects of different address spaces.
<u></u><u></u></p>
<p class="MsoNormal">One from global constant (address space 4, addr_size = 64) and the other from local, LDS (address space 3, addr_size= 32).<u></u><u></u></p>
<p class="MsoNormal">(Details of various address spaces available for AMDGPU backend:
<a href="https://llvm.org/docs/AMDGPUUsage.html#address-spaces" target="_blank">https://llvm.org/docs/AMDGPUUsage.html#address-spaces</a>)<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">With upstream compiler, the testcase fails with a crash (given at the end of the e-mail) in the opt while trying to generate the RT check for these pointers. Precisely, with two pointers of different address spaces.<u></u><u></u></p>
<p class="MsoNormal">The operand type check fails while trying to insert a ‘AddExpr’ SCEV node as their effective type differs for these pointers (One with 32-bit and the other with 64-bit)<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><b>Question: Is this intended to try for the RtCheck on pointers from different address spaces?
<u></u><u></u></b></p>
<p class="MsoNormal"> The comments given in the code snippet (below) hints they aren’t.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Code snippet from LoopAccessAnalysis.cpp:<u></u><u></u></p>
<p class="MsoNormal">-----------------------------------------------------------------------------------------------------------------------<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> bool AccessAnalysis::canCheckPtrAtRT(...) {<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> ----------<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> // If the pointers that we would use for the bounds comparison have different<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> // address spaces, assume the values aren't directly comparable, so we can't<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> // use them for the runtime check. We also have to assume they could<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> // overlap. In the future there should be metadata for whether address spaces<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> // are disjoint.<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> unsigned NumPointers = RtCheck.Pointers.size();<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> for (unsigned i = 0; i < NumPointers; ++i) {<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> for (unsigned j = i + 1; j < NumPointers; ++j) {<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> // Only need to check pointers between two different dependency sets.<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> if (RtCheck.Pointers[i].DependencySetId ==<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> RtCheck.Pointers[j].DependencySetId)<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> continue;<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> // Only need to check pointers in the same alias set.<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> if (RtCheck.Pointers[i].AliasSetId != RtCheck.Pointers[j].AliasSetId)<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> continue;<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> Value *PtrI = RtCheck.Pointers[i].PointerValue;<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> Value *PtrJ = RtCheck.Pointers[j].PointerValue;<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> unsigned ASi = PtrI->getType()->getPointerAddressSpace();<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> unsigned ASj = PtrJ->getType()->getPointerAddressSpace();<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> if (ASi != ASj) {<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> LLVM_DEBUG(<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> dbgs() << "LAA: Runtime check would require comparison between"<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> " different address spaces\n");<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> return false;<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> }<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> }<u></u><u></u></p>
<p class="MsoNormal">----------------------------------------------------------------------------------------------------<u></u><u></u></p>
<p class="MsoNormal">More details about the objects, the pointers and the memory operations:<u></u><u></u></p>
<p class="MsoNormal">----------------------------------------------------------------------------------------------------<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">%struct_var1 = type { <2 x float> }<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">%struct_var2 = type { %struct_var1 }<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">%class_var1 = type { i32, i32, i32, %struct_var2*, i32, i32, i32}<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">%class_var2 = type { %class_var1, i8, i8*, i32 }<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">Objects:<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">@Obj1 = external protected local_unnamed_addr addrspace(4) externally_initialized global %class_var2, align 8<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">@Obj2 = internal unnamed_addr addrspace(3) constant [4000 x float] undef, align 16<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">Pointers:<u></u><u></u></p>
<p style="margin-left:1in">
<u></u><span>1.<span style="font:7pt "Times New Roman"">
</span></span><u></u>%struct_var1.cast = bitcast %struct_var1* %struct_var2.gep to i64* (write) // AS1<u></u><u></u></p>
<p style="margin-left:1in">
<u></u><span>2.<span style="font:7pt "Times New Roman"">
</span></span><u></u>%struct_var2.cast = bitcast %struct_var2* %arrayidx74 to i64* (read-only) // AS1<u></u><u></u></p>
<p style="margin-left:1in">
<u></u><span>3.<span style="font:7pt "Times New Roman"">
</span></span><u></u>%arrayidx1705 = getelementptr inbounds [4000 x float], [4000 x float] addrspace(3)* @Obj2, i32 0, i32 %add125 (read-only) // AS2<u></u><u></u></p>
<p style="margin-left:1in">
<u></u><span>4.<span style="font:7pt "Times New Roman"">
</span></span><u></u>%arrayidx274 = getelementptr inbounds [4000 x float], [4000 x float] addrspace(3)* @Obj2, i32 0, i32 %arg1 (read-only) // AS2<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">While the pointers 1 & 2 belong to one Alias Set (AS1), pointers 3 & 4 belong to a different set (AS2). It is because, the Global Alias Analysis found there is no alias between these two sets of pointers.<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">The crash occurs with the pointers 1 & 4 which are from AS1 and AS2 respectively.
<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">The DependenceSetId will be reset to 1 before processing a new AS and the pointers in question, ended up having the same DependenceSetId (1), though they are from different AS.<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal"> ----------------------------------------------------------------------------------------------------------------------------------------------------------<u></u><u></u></p>
<p class="MsoNormal"> The load/store (memory operations) using these pointers in the loop. (extracted only the relevant instructions):<u></u><u></u></p>
<p class="MsoNormal"> ----------------------------------------------------------------------------------------------------------------------------------------------------------<u></u><u></u></p>
<p class="MsoNormal"> define protected amdgpu_kernel void @test_func(i32 %arg1, i32 %arg2) {<u></u><u></u></p>
<p class="MsoNormal"> entry:<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> <b>%arrayidx274 = getelementptr inbounds [4000 x float], [4000 x float] addrspace(3)* @Obj2, i32 0, i32 %arg1<u></u><u></u></b></p>
<p class="MsoNormal" style="margin-left:0.5in"><b> </b>---------<b><u></u><u></u></b></p>
<p class="MsoNormal" style="margin-left:0.5in"> br i1 %cmp1, label %header, label %for.end<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">header:<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> % <b>struct_var2.ld</b> = load %struct_var2*, %struct_var2* addrspace(4)* getelementptr inbounds (%class_var2, %class_var2 addrspace(4)* @Obj1, i64 0, i32 0, i32 3), align 8<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> %struct_var2.gep = getelementptr inbounds %struct_var2, %struct_var2* %struct_var2.ld, i64 undef, i32 0<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><b> %struct_var1.cast = bitcast %struct_var1* %struct_var2.gep to i64*<u></u><u></u></b></p>
<p class="MsoNormal" style="margin-left:0.5in"> br label %for.body<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">for.body:<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> --------- <u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> %arrayidx74 = getelementptr inbounds %struct_var2, %struct_var2* %struct_var2.ld, i64 %idxprom73<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><b> %struct_var2.cast = bitcast %struct_var2* %arrayidx74 to i64*<u></u><u></u></b></p>
<p class="MsoNormal" style="margin-left:0.5in"><b> </b>%for.body.ld = load i64, i64* %<b>struct_var2.cast</b>, align 8<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> ---------<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> br i1 %cmp2, label %if.then, label %if.end<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">if.then:<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> %rem = srem i32 1, %arg2<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> %add125 = add nuw nsw i32 %rem, 1<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><b> %arrayidx1705 = getelementptr inbounds [4000 x float], [4000 x float] addrspace(3)* @Obj2, i32 0, i32 %add125<u></u><u></u></b></p>
<p class="MsoNormal" style="margin-left:0.5in"> %arrayidx1705.ld = load float, float addrspace(3)* %<b>arrayidx1705</b>, align 4<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> %arrayidx274.ld = load float, float addrspace(3)* %<b>arrayidx274</b>, align 4<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> ---------<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> br label %if.end<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">if.end:<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> store i64 %for.body.ld, i64* %<b>struct_var1.cast</b>, align 8<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> ---------<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> br i1 %cmp3, label %for.body, label %for.end<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">for.end:<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"> br exit<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">exit:<u></u><u></u></p>
<p class="MsoNormal"> }<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">----------------------------------------------------------------------------------------------------------------------------------------------------------<u></u><u></u></p>
<p class="MsoNormal">The actual crash and the back-trace:<u></u><u></u></p>
<p class="MsoNormal">----------------------------------------------------------------------------------------------------------------------------------------------------------<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">opt: $SRC/llvm-project/llvm/lib/Analysis/ScalarEvolution.cpp:2165: const llvm::SCEV *llvm::ScalarEvolution::getAddExpr(SmallVectorImpl<const llvm::SCEV *> &, SCEV::NoWrapFlags, unsigned int): Assertion `getEffectiveSCEVType(Ops[i]->getType())
== ETy && "SCEVAddExpr operand types don't match!"' failed.<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">PLEASE submit a bug report to <a href="https://bugs.llvm.org/" target="_blank">https://bugs.llvm.org/</a> and include the crash backtrace.<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">Stack dump:<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">0. Program arguments: $Tools/bin/opt -O3 test.ll -o out.ll<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::ScalarEvolution::getAddExpr(llvm::SmallVectorImpl<llvm::SCEV const*>&, llvm::SCEV::NoWrapFlags, unsigned int) $SRC/llvm-project/llvm/lib/Analysis/ScalarEvolution.cpp:2164:5<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::ScalarEvolution::getAddExpr(llvm::SCEV const*, llvm::SCEV const*, llvm::SCEV::NoWrapFlags, unsigned int) $SRC/llvm-project/llvm/include/llvm/Analysis/ScalarEvolution.h:526:3<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::ScalarEvolution::getMinusSCEV(llvm::SCEV const*, llvm::SCEV const*, llvm::SCEV::NoWrapFlags, unsigned int) $SRC/llvm-project/llvm/lib/Analysis/ScalarEvolution.cpp:3833:3<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">getMinFromExprs(llvm::SCEV const*, llvm::SCEV const*, llvm::ScalarEvolution*) $SRC/llvm-project/llvm/lib/Analysis/LoopAccessAnalysis.cpp:275:15<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::RuntimeCheckingPtrGroup::addPointer(unsigned int) $SRC/llvm-project/llvm/lib/Analysis/LoopAccessAnalysis.cpp:292:15<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::RuntimePointerChecking::groupChecks(llvm::EquivalenceClasses<llvm::PointerIntPair<llvm::Value*, 1u, bool, llvm::PointerLikeTypeTraits<llvm::Value*>, llvm::PointerIntPairInfo<llvm::Value*, 1u, llvm::PointerLikeTypeTraits<llvm::Value*>
> > >&, bool) $SRC/llvm-project/llvm/lib/Analysis/LoopAccessAnalysis.cpp:413:13<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::RuntimePointerChecking::generateChecks(llvm::EquivalenceClasses<llvm::PointerIntPair<llvm::Value*, 1u, bool, llvm::PointerLikeTypeTraits<llvm::Value*>, llvm::PointerIntPairInfo<llvm::Value*, 1u, llvm::PointerLikeTypeTraits<llvm::Value*>
> > >&, bool) $SRC/llvm-project/llvm/lib/Analysis/LoopAccessAnalysis.cpp:259:12<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">(anonymous namespace)::AccessAnalysis::canCheckPtrAtRT(llvm::RuntimePointerChecking&, llvm::ScalarEvolution*, llvm::Loop*, llvm::DenseMap<llvm::Value const*, llvm::Value*, llvm::DenseMapInfo<llvm::Value const*>,
llvm::detail::DenseMapPair<llvm::Value const*, llvm::Value*> > const&, bool) $SRC/llvm-project/llvm/lib/Analysis/LoopAccessAnalysis.cpp:830:3<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::LoopAccessInfo::analyzeLoop(llvm::AAResults*, llvm::LoopInfo*, llvm::TargetLibraryInfo const*, llvm::DominatorTree*) $SRC/llvm-project/llvm/lib/Analysis/LoopAccessAnalysis.cpp:2038:8<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::LoopAccessInfo::LoopAccessInfo(llvm::Loop*, llvm::ScalarEvolution*, llvm::TargetLibraryInfo const*, llvm::AAResults*, llvm::DominatorTree*, llvm::LoopInfo*) $SRC/llvm-project/llvm/lib/Analysis/LoopAccessAnalysis.cpp:2222:1<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">std::_MakeUniq<llvm::LoopAccessInfo>::__single_object std::make_unique<llvm::LoopAccessInfo, llvm::Loop*&, llvm::ScalarEvolution*&, llvm::TargetLibraryInfo const*&, llvm::AAResults*&, llvm::DominatorTree*&, llvm::LoopInfo*&>(llvm::Loop*&,
llvm::ScalarEvolution*&, llvm::TargetLibraryInfo const*&, llvm::AAResults*&, llvm::DominatorTree*&, llvm::LoopInfo*&) /usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/bits/unique_ptr.h:821:34<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::LoopAccessLegacyAnalysis::getInfo(llvm::Loop*) $SRC/llvm-project/llvm/lib/Analysis/LoopAccessAnalysis.cpp:2275:5<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">(anonymous namespace)::LoopLoadElimination::runOnFunction(llvm::Function&)::'lambda'(llvm::Loop&)::operator()(llvm::Loop&) const $SRC/llvm-project/llvm/lib/Transforms/Scalar/LoopLoadElimination.cpp:651:53<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::LoopAccessInfo const& llvm::function_ref<llvm::LoopAccessInfo const& (llvm::Loop&)>::callback_fn<(anonymous namespace)::LoopLoadElimination::runOnFunction(llvm::Function&)::'lambda'(llvm::Loop&)>(long, llvm::Loop&)
$SRC/llvm-project/llvm/include/llvm/ADT/STLExtras.h:185:5<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::function_ref<llvm::LoopAccessInfo const& (llvm::Loop&)>::operator()(llvm::Loop&) const $SRC/llvm-project/llvm/include/llvm/ADT/STLExtras.h:203:5<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">eliminateLoadsAcrossLoops(llvm::Function&, llvm::LoopInfo&, llvm::DominatorTree&, llvm::BlockFrequencyInfo*, llvm::ProfileSummaryInfo*, llvm::function_ref<llvm::LoopAccessInfo const& (llvm::Loop&)>) $SRC/llvm-project/llvm/lib/Transforms/Scalar/LoopLoadElimination.cpp:618:53<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">(anonymous namespace)::LoopLoadElimination::runOnFunction(llvm::Function&) $SRC/llvm-project/llvm/lib/Transforms/Scalar/LoopLoadElimination.cpp:649:5<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::FPPassManager::runOnFunction(llvm::Function&) $SRC/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1587:23<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::FPPassManager::runOnModule(llvm::Module&) $SRC/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1629:16<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">(anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) $SRC/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1698:23<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::legacy::PassManagerImpl::run(llvm::Module&) $SRC/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:614:16<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">llvm::legacy::PassManager::run(llvm::Module&) $SRC/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1824:3<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">main $SRC/llvm-project/llvm/tools/opt/opt.cpp:955:3<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">__libc_start_main /build/glibc-2ORdQG/glibc-2.27/csu/../csu/libc-start.c:344:0<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">_start ($Tools/bin/opt+0xc98b6a)<u></u><u></u></p>
<p class="MsoNormal" style="margin-left:0.5in">Aborted (core dumped)<u></u><u></u></p>
<p class="MsoNormal">-----------------------------------------------------------------------------------------------------------------------------------------------------------------<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Regards,<u></u><u></u></p>
<p class="MsoNormal">CD<u></u><u></u></p>
</div>
</div>
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