https://llvm.org/bugs/show_bug.cgi?id=24852
Bug ID: 24852
Summary: InstCombine crashes when invoked with '-debug' on the
attached case
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: michael.v.zolotuk...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 14890
--> https://llvm.org/bugs/attachment.cgi?id=14890&action=edit
reproducer
Stack trace:
$ opt < crash.ll -instcombine -debug
...
INSTCOMBINE ITERATION #1 on main
IC: ADDING: 15 instrs to worklist
IC: Visiting: %S = alloca [54 x i8], align 16
IC: Visiting: %D = alloca [128 x i8], align 16
IC: Visiting: %0 = bitcast [54 x i8]* %S to i8*, !dbg !3
IC: Old = %0 = bitcast [54 x i8]* %S to i8*, !dbg !3
New = <badref> = getelementptr inbounds [54 x i8], [54 x i8]* %S, i32 0,
i32 0
IC: ADD: <badref> = getelementptr inbounds [54 x i8], [54 x i8]* %S, i32 0,
i32 00 opt 0x000000010fd2d42d
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 61
1 opt 0x000000010fd2c9a6 llvm::sys::RunSignalHandlers() +
70
2 opt 0x000000010fd2de9f SignalHandler(int) + 575
3 libsystem_platform.dylib 0x00007fff93ead52a _sigtramp + 26
4 libsystem_platform.dylib 0x00007fff50f0f828 _sigtramp + 3171296024
5 opt 0x000000010fb6865e (anonymous
namespace)::AssemblyWriter::printMetadataAttachments(llvm::SmallVectorImpl<std::__1::pair<unsigned
int, llvm::MDNode*> > const&, llvm::StringRef) + 78
6 opt 0x000000010fb53ea6 (anonymous
namespace)::AssemblyWriter::printInstruction(llvm::Instruction const&) + 15942
7 opt 0x000000010fb4fcc9
llvm::Value::print(llvm::raw_ostream&, llvm::ModuleSlotTracker&) const + 569
8 opt 0x000000010fb4f8fe
llvm::Value::print(llvm::raw_ostream&) const + 542
9 opt 0x000000010f820146
llvm::InstCombineWorklist::Add(llvm::Instruction*) + 182
10 opt 0x000000010f81d038 llvm::InstCombiner::run() + 2920
11 opt 0x000000010f81e624
combineInstructionsOverFunction(llvm::Function&, llvm::InstCombineWorklist&,
llvm::AAResults*, llvm::AssumptionCache&, llvm::TargetLibraryInfo&,
llvm::DominatorTree&, llvm::LoopInfo*) + 3860
12 opt 0x000000010f81ee4a (anonymous
namespace)::InstructionCombiningPass::runOnFunction(llvm::Function&) + 586
13 opt 0x000000010fc7a3a8
llvm::FPPassManager::runOnFunction(llvm::Function&) + 328
14 opt 0x000000010fc7a5fb
llvm::FPPassManager::runOnModule(llvm::Module&) + 43
15 opt 0x000000010fc7ab46
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 998
16 opt 0x000000010ecfc314 main + 8468
17 libdyld.dylib 0x00007fff870d65ad start + 1
18 libdyld.dylib 0x0000000000000003 start + 2029165143
Segmentation fault: 11
$ clang -v
clang version 3.8.0 (trunk 247715) (llvm/trunk 247716)
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