[llvm-bugs] [Bug 45473] New: llvm-reduce crashes in extractArgumentsFromModule

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45473

            Bug ID: 45473
           Summary: llvm-reduce crashes in extractArgumentsFromModule
           Product: tools
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: llvm-reduce
          Assignee: unassignedbugs at nondot.org
          Reporter: jay.foad at gmail.com
                CC: dblaikie at gmail.com, llvm-bugs at lists.llvm.org

Created attachment 23325
  --> https://bugs.llvm.org/attachment.cgi?id=23325&action=edit
test case

With the attached test case and llc built from current master (commit
625acd8f6847a156b236b8f11b4b02b11cac3766) I get:

$ llvm-reduce -test test.sh p.ll
[...]
 **** SUCCESS | lines: 0
Increasing granularity...Success! New Chunks:
        [1,5]
        [6,9]

Program received signal SIGSEGV, Segmentation fault.
llvm::PointerIntPair<llvm::ilist_node_base<true>*, 1u, unsigned int,
llvm::PointerLikeTypeTraits<llvm::ilist_node_base<true>*>,
llvm::PointerIntPairInfo<llvm::ilist_node_base<true>*, 1u,
llvm::PointerLikeTypeTraits<llvm::ilist_node_base<true>*> >
>::setPointer(llvm::ilist_node_base<true>*) & (this=0x0, PtrVal=0x0) at
/home/jayfoad2/git/llvm-project/llvm/include/llvm/ADT/PointerIntPair.h:64
64          Value = Info::updatePointer(Value, PtrVal);
(gdb) bt
#0  llvm::PointerIntPair<llvm::ilist_node_base<true>*, 1u, unsigned int,
llvm::PointerLikeTypeTraits<llvm::ilist_node_base<true>*>,
llvm::PointerIntPairInfo<llvm::ilist_node_base<true>*, 1u,
llvm::PointerLikeTypeTraits<llvm::ilist_node_base<true>*> >
>::setPointer(llvm::ilist_node_base<true>*) & (this=0x0, PtrVal=0x0) at
/home/jayfoad2/git/llvm-project/llvm/include/llvm/ADT/PointerIntPair.h:64
#1  0x000000000093bc1d in llvm::ilist_node_base<true>::setPrev (this=0x0,
Prev=0x0) at
/home/jayfoad2/git/llvm-project/llvm/include/llvm/ADT/ilist_node_base.h:40
#2  0x00000000009b6a73 in llvm::ilist_base<true>::removeImpl (N=...) at
/home/jayfoad2/git/llvm-project/llvm/include/llvm/ADT/ilist_base.h:33
#3  0x00000000009b6a15 in
llvm::ilist_base<true>::remove<llvm::ilist_node_impl<llvm::ilist_detail::node_options<llvm::Instruction,
true, false, void> > > (N=...) at
/home/jayfoad2/git/llvm-project/llvm/include/llvm/ADT/ilist_base.h:80
#4  0x00000000009b69f1 in llvm::simple_ilist<llvm::Instruction>::remove
(this=0x28, N=...) at
/home/jayfoad2/git/llvm-project/llvm/include/llvm/ADT/simple_ilist.h:183
#5  0x00000000009b6996 in
llvm::iplist_impl<llvm::simple_ilist<llvm::Instruction>,
llvm::SymbolTableListTraits<llvm::Instruction> >::remove (this=0x28, IT=...) at
/home/jayfoad2/git/llvm-project/llvm/include/llvm/ADT/ilist.h:254
#6  0x00000000009b6900 in
llvm::iplist_impl<llvm::simple_ilist<llvm::Instruction>,
llvm::SymbolTableListTraits<llvm::Instruction> >::erase (this=0x28, where=...)
at /home/jayfoad2/git/llvm-project/llvm/include/llvm/ADT/ilist.h:268
#7  0x0000000000a81a23 in llvm::Instruction::eraseFromParent (this=0x13cfbe0)
at /home/jayfoad2/git/llvm-project/llvm/lib/IR/Instruction.cpp:68
#8  0x0000000000935e79 in extractArgumentsFromModule (ChunksToKeep=std::vector
of length 1, capacity 1 = {...}, Program=0x139c410) at
/home/jayfoad2/git/llvm-project/llvm/tools/llvm-reduce/deltas/ReduceArguments.cpp:76
#9  0x000000000093122f in std::_Function_handler<void (std::vector<llvm::Chunk,
std::allocator<llvm::Chunk> > const&, llvm::Module*), void
(*)(std::vector<llvm::Chunk, std::allocator<llvm::Chunk> >,
llvm::Module*)>::_M_invoke(std::_Any_data const&, std::vector<llvm::Chunk,
std::allocator<llvm::Chunk> > const&, llvm::Module*&&) (__functor=...,
__args=@0x7fffffffd788: 0x139c410, __args=@0x7fffffffd788: 0x139c410) at
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/std_function.h:297
#10 0x0000000000923540 in std::function<void (std::vector<llvm::Chunk,
std::allocator<llvm::Chunk> > const&,
llvm::Module*)>::operator()(std::vector<llvm::Chunk,
std::allocator<llvm::Chunk> > const&, llvm::Module*) const
(this=0x7fffffffdac0, __args=0x139c410, __args=0x139c410)
    at
/usr/bin/../lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/std_function.h:687
#11 0x00000000009222a8 in llvm::runDeltaPass(llvm::TestRunner&, int,
std::function<void (std::vector<llvm::Chunk, std::allocator<llvm::Chunk> >
const&, llvm::Module*)>) (Test=..., Targets=18, ExtractChunksFromModule=...)
    at
/home/jayfoad2/git/llvm-project/llvm/tools/llvm-reduce/deltas/Delta.cpp:132
#12 0x0000000000935716 in llvm::reduceArgumentsDeltaPass (Test=...) at
/home/jayfoad2/git/llvm-project/llvm/tools/llvm-reduce/deltas/ReduceArguments.cpp:124
#13 0x00000000009163e9 in llvm::runDeltaPasses (Tester=...) at
/home/jayfoad2/git/llvm-project/llvm/tools/llvm-reduce/DeltaManager.h:31
#14 0x0000000000915286 in main (argc=4, argv=0x7fffffffde28) at
/home/jayfoad2/git/llvm-project/llvm/tools/llvm-reduce/llvm-reduce.cpp:88
(gdb) up 8
#8  0x0000000000935e79 in extractArgumentsFromModule (ChunksToKeep=std::vector
of length 1, capacity 1 = {...}, Program=0x139c410) at
/home/jayfoad2/git/llvm-project/llvm/tools/llvm-reduce/deltas/ReduceArguments.cpp:76
76            I->eraseFromParent();
(gdb) call I->dump()
  <badref> = shufflevector 
Program received signal SIGSEGV, Segmentation fault.

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