| Issue |
185423
|
| Summary |
Assertion `isConditional() && "Cannot get condition of an uncond branch!"' failed.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
TatyanaDoubts
|
To reproduce run opt with th test below ():
```
; ModuleID = './reduced.ll'
source_filename = "./reduced.ll"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
target triple = "x86_64-unknown-linux-gnu"
define void @wombat() #0 gc "statepoint-example" {
bb:
br label %bb1
bb1: ; preds = %bb6, %bb
%phi = phi i64 [ 0, %bb ], [ %add7, %bb6 ]
%mul = mul i64 %phi, %phi
%trunc = trunc i64 %mul to i32
br label %bb3
bb2: ; preds = %bb3
%add = add i32 %phi4, 1
%icmp = icmp eq i32 %phi4, 0
br i1 %icmp, label %bb8, label %bb3
bb3: ; preds = %bb2, %bb1
%phi4 = phi i32 [ %add, %bb2 ], [ %trunc, %bb1 ]
%phi5 = phi i32 [ %or, %bb2 ], [ 0, %bb1 ]
%or = or i32 %phi5, 0
br i1 false, label %bb6, label %bb2, !prof !0
bb6: ; preds = %bb3
%add7 = add nsw i64 %phi, 1
br label %bb1
bb8: ; preds = %bb2
ret void
}
attributes #0 = { "target-cpu"="skylake-avx512" }
!0 = !{!"branch_weights", i32 127, i32 14209}
```
Reproducer: https://godbolt.org/z/qEEYM1Td4
Stack dump:
```
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/opt -o /app/output.s -S -passes=loop-unroll <source>
1. Running pass "function(loop-unroll<O2>)" on module "<source>"
2. Running pass "loop-unroll<O2>" on function "wombat"
#0 0x0000000005c09b78 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5c09b78)
#1 0x0000000005c069a4 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#2 0x00007b1b2f842520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x00007b1b2f8969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x00007b1b2f842476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x00007b1b2f8287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x00007b1b2f82871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x00007b1b2f839e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x00000000052000cb llvm::ScalarEvolution::computeBackedgeTakenCount(llvm::Loop const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x52000cb)
#9 0x000000000520044d llvm::ScalarEvolution::getBackedgeTakenInfo(llvm::Loop const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x520044d)
#10 0x0000000005218a35 llvm::ScalarEvolution::getBackedgeTakenCount(llvm::Loop const*, llvm::ScalarEvolution::ExitCountKind) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5218a35)
#11 0x0000000005203397 llvm::ScalarEvolution::getRangeRef(llvm::SCEV const*, llvm::ScalarEvolution::RangeSignHint, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5203397)
#12 0x00000000052054e9 StrengthenNoWrapFlags(llvm::ScalarEvolution*, llvm::SCEVTypes, llvm::ArrayRef<llvm::SCEV const*>, llvm::SCEV::NoWrapFlags) ScalarEvolution.cpp:0:0
#13 0x00000000052101d3 llvm::ScalarEvolution::getAddExpr(llvm::SmallVectorImpl<llvm::SCEV const*>&, llvm::SCEV::NoWrapFlags, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x52101d3)
#14 0x00000000051fd53d llvm::ScalarEvolution::createSCEV(llvm::Value*) (.part.0) ScalarEvolution.cpp:0:0
#15 0x00000000051fe059 llvm::ScalarEvolution::createSCEVIter(llvm::Value*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x51fe059)
#16 0x00000000052035f2 llvm::ScalarEvolution::getRangeRef(llvm::SCEV const*, llvm::ScalarEvolution::RangeSignHint, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x52035f2)
#17 0x00000000052054e9 StrengthenNoWrapFlags(llvm::ScalarEvolution*, llvm::SCEVTypes, llvm::ArrayRef<llvm::SCEV const*>, llvm::SCEV::NoWrapFlags) ScalarEvolution.cpp:0:0
#18 0x0000000005211f40 llvm::ScalarEvolution::getMulExpr(llvm::SmallVectorImpl<llvm::SCEV const*>&, llvm::SCEV::NoWrapFlags, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5211f40)
#19 0x0000000004e45c4d llvm::SCEVExpander::visitAddRecExpr(llvm::SCEVAddRecExpr const*) (.part.0) ScalarEvolutionExpander.cpp:0:0
#20 0x0000000004e3ed25 llvm::SCEVVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEV const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e3ed25)
#21 0x0000000004e3f8fd llvm::SCEVExpander::expand(llvm::SCEV const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e3f8fd)
#22 0x0000000004e45b67 llvm::SCEVExpander::visitAddRecExpr(llvm::SCEVAddRecExpr const*) (.part.0) ScalarEvolutionExpander.cpp:0:0
#23 0x0000000004e3ed25 llvm::SCEVVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEV const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e3ed25)
#24 0x0000000004e3f8fd llvm::SCEVExpander::expand(llvm::SCEV const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e3f8fd)
#25 0x0000000004e45953 llvm::SCEVExpander::visitAddRecExpr(llvm::SCEVAddRecExpr const*) (.part.0) ScalarEvolutionExpander.cpp:0:0
#26 0x0000000004e3ed25 llvm::SCEVVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEV const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e3ed25)
#27 0x0000000004e3f8fd llvm::SCEVExpander::expand(llvm::SCEV const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e3f8fd)
#28 0x0000000004e40fef llvm::SCEVExpander::getAddRecExprPHILiterally(llvm::SCEVAddRecExpr const*, llvm::Loop const*, llvm::Type*&, bool&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e40fef)
#29 0x0000000004e4428e llvm::SCEVExpander::expandAddRecExprLiterally(llvm::SCEVAddRecExpr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e4428e)
#30 0x0000000004e3ed25 llvm::SCEVVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEV const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e3ed25)
#31 0x0000000004e3f8fd llvm::SCEVExpander::expand(llvm::SCEV const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e3f8fd)
#32 0x0000000004e46348 llvm::SCEVExpander::expandCodeFor(llvm::SCEV const*, llvm::Type*, llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void, true, llvm::BasicBlock>, false, false>) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e46348)
#33 0x0000000004dc7eb9 llvm::UnrollRuntimeLoopRemainder(llvm::Loop*, unsigned int, bool, bool, bool, bool, llvm::LoopInfo*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::TargetTransformInfo const*, bool, unsigned int, bool, llvm::Loop**, std::optional<unsigned int>, llvm::BranchProbability) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4dc7eb9)
#34 0x0000000004db3c6e llvm::UnrollLoop(llvm::Loop*, llvm::UnrollLoopOptions, llvm::LoopInfo*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::TargetTransformInfo const*, llvm::OptimizationRemarkEmitter*, bool, llvm::Loop**, llvm::AAResults*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4db3c6e)
#35 0x000000000496e889 tryToUnrollLoop(llvm::Loop*, llvm::DominatorTree&, llvm::LoopInfo*, llvm::ScalarEvolution&, llvm::TargetTransformInfo const&, llvm::AssumptionCache&, llvm::OptimizationRemarkEmitter&, llvm::BlockFrequencyInfo*, llvm::ProfileSummaryInfo*, bool, int, bool, bool, bool, std::optional<unsigned int>, std::optional<unsigned int>, std::optional<bool>, std::optional<bool>, std::optional<bool>, std::optional<bool>, std::optional<bool>, std::optional<unsigned int>, llvm::AAResults*) LoopUnrollPass.cpp:0:0
#36 0x0000000004971097 llvm::LoopUnrollPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4971097)
#37 0x000000000312902e llvm::detail::PassModel<llvm::Function, llvm::LoopUnrollPass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x312902e)
#38 0x0000000005973aa1 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5973aa1)
#39 0x0000000000f2551e llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0xf2551e)
#40 0x000000000597205a llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x597205a)
#41 0x000000000096ee5e llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x96ee5e)
#42 0x0000000005971a11 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5971a11)
#43 0x000000000097901a llvm::runPassPipeline(llvm::StringRef, llvm::Module&, llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef, llvm::ArrayRef<llvm::PassPlugin>, llvm::ArrayRef<std::function<void (llvm::PassBuilder&)>>, llvm::opt_tool::OutputKind, llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x97901a)
#44 0x000000000096d0b5 optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x96d0b5)
#45 0x00007b1b2f829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#46 0x00007b1b2f829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#47 0x0000000000963d95 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x963d95)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
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