[llvm-bugs] [Bug 41696] New: 'Value Propagation' pass crashes with "opt -early-cse-memssa -loop-rotate -newgvn -mem2reg -loop-vectorize -indvars -gvn -licm -jump-threading -instcombine -loop-reroll -correlated-propagation"

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41696

            Bug ID: 41696
           Summary: 'Value Propagation' pass crashes with "opt
                    -early-cse-memssa -loop-rotate -newgvn -mem2reg
                    -loop-vectorize -indvars -gvn -licm -jump-threading
                    -instcombine -loop-reroll  -correlated-propagation"
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: cszide at 163.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 21861
  --> https://bugs.llvm.org/attachment.cgi?id=21861&action=edit
.bc file of the source code

$clang -v
clang version 9.0.0 (trunk 355281)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64

$clang -O3 -c -emit-llvm  -mllvm -disable-llvm-optzns small.c -o small.bc

$opt -early-cse-memssa -loop-rotate -newgvn -mem2reg -loop-vectorize -indvars
-gvn -licm -jump-threading -instcombine -loop-reroll  -correlated-propagation 
small.bc -o small-opt.bc
Stack dump:
0.      Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt -early-cse-memssa
-loop-rotate -newgvn -mem2reg -loop-vectorize -indvars -gvn -licm
-jump-threading -instcombine -loop-reroll -correlated-propagation small.bc -o
small-opt.bc 
1.      Running pass 'Function Pass Manager' on module 'small.bc'.
2.      Running pass 'Value Propagation' on function '@c'
 #0 0x0000562f5e2e2d2a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d9d2a)
 #1 0x0000562f5e2e0d04 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7d04)
 #2 0x0000562f5e2e0e42 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x20d7e42)
 #3 0x00007fe71217e890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
 #4 0x0000562f5d6d629d getValueFromCondition(llvm::Value*, llvm::Value*, bool,
llvm::DenseMap<llvm::Value*, llvm::ValueLatticeElement,
llvm::DenseMapInfo<llvm::Value*>, llvm::detail::DenseMapPair<llvm::Value*,
llvm::ValueLatticeElement> >&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14cd29d)
 #5 0x0000562f5d6d64ef getValueFromCondition(llvm::Value*, llvm::Value*, bool)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14cd4ef)
 #6 0x0000562f5d6d75a3 (anonymous
namespace)::LazyValueInfoImpl::getEdgeValue(llvm::Value*, llvm::BasicBlock*,
llvm::BasicBlock*, llvm::ValueLatticeElement&, llvm::Instruction*) (.part.469)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14ce5a3)
 #7 0x0000562f5d6d7845 (anonymous
namespace)::LazyValueInfoImpl::getEdgeValue(llvm::Value*, llvm::BasicBlock*,
llvm::BasicBlock*, llvm::ValueLatticeElement&, llvm::Instruction*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14ce845)
 #8 0x0000562f5d6db2f4 llvm::LazyValueInfo::getConstantOnEdge(llvm::Value*,
llvm::BasicBlock*, llvm::BasicBlock*, llvm::Instruction*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x14d22f4)
 #9 0x0000562f5e03d842 runImpl(llvm::Function&, llvm::LazyValueInfo*,
llvm::DominatorTree*, llvm::SimplifyQuery const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1e34842)
#10 0x0000562f5e03f990 (anonymous
namespace)::CorrelatedValuePropagation::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1e36990)
#11 0x0000562f5dc9c7a9 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a937a9)
#12 0x0000562f5dc9c831 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a93831)
#13 0x0000562f5dc9bb59 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x1a92b59)
#14 0x0000562f5c839153 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x630153)
#15 0x00007fe710e13b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#16 0x0000562f5c8cdf6a _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm/build4/bin/opt+0x6c4f6a)
Segmentation fault (core dumped)

-----------------------------------------
int a[10];
int b;
int c() {
  unsigned long int d[8];
  int *e = &a[2];
  unsigned int f[8] = {e, e, e};
  for (a[2] = 0; a[2] < 8; a[2]++)
    d[a[2]] = 0;
  b = ~*e >= *e;
}

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