[llvm-bugs] [Bug 48531] New: opt crashed with "-licm": Assertion `MSSA->dominates(NewDef, FirstDef) && "Should have dominated the new access"' failed.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48531

            Bug ID: 48531
           Summary: opt crashed with "-licm": Assertion
                    `MSSA->dominates(NewDef, FirstDef) && "Should have
                    dominated the new access"' failed.
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: suochenyao at 163.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Created attachment 24292
  --> https://bugs.llvm.org/attachment.cgi?id=24292&action=edit
bc file pased to opt

*******************************************************************************
OS and Platform:
CentOS Linux release 7.8.2003 (Core), x86_64 GNU/Linux
*******************************************************************************
Program:
int a, d;
short b;
long c;
void e() {
f : {
  int g;
  for (; 1; d++)
    ;
  if (g) {
    if (a)
      goto h;
  i:
    if (b)
    h:
      goto f;
  }
  if (c)
    goto i;
}
}
int main() {}
*******************************************************************************
clang version:
$ clang -v
clang version 12.0.0 (/home/suocy/src/llvm-dev/llvm-project/llvm/tools/clang
cee1e7d14f4628d6174b33640d502bff3b54ae45)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/suocy/bin/llvm-dev/bin
Found candidate GCC installation:
/opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.8.5
Selected GCC installation:
/opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
*******************************************************************************
Command Lines:
$ clang -O3 -mllvm -disable-llvm-optzns -c -emit-llvm a.c -o a.bc
$ opt -licm a.bc -o a.opt.bc
opt:
/home/suocy/src/llvm-dev/llvm-project/llvm/lib/Analysis/MemorySSAUpdater.cpp:508:
void llvm::MemorySSAUpdater::fixupDefs(const
llvm::SmallVectorImpl<llvm::WeakVH>&): Assertion `MSSA->dominates(NewDef,
FirstDef) && "Should have dominated the new access"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace.
Stack dump:
0.      Program arguments: /home/suocy/bin/llvm-dev/bin/opt -licm a.bc -o
a.opt.bc
1.      Running pass 'Function Pass Manager' on module 'a.bc'.
2.      Running pass 'Loop Pass Manager' on function '@e'
3.      Running pass 'Loop Invariant Code Motion' on basic block '%for.cond'
 #0 0x0000000002aa662c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/home/suocy/bin/llvm-dev/bin/opt+0x2aa662c)
 #1 0x0000000002aa44a4 llvm::sys::RunSignalHandlers()
(/home/suocy/bin/llvm-dev/bin/opt+0x2aa44a4)
 #2 0x0000000002aa4603 SignalHandler(int)
(/home/suocy/bin/llvm-dev/bin/opt+0x2aa4603)
 #3 0x00007faffc316630 __restore_rt (/lib64/libpthread.so.0+0xf630)
 #4 0x00007faffaf04387 raise (/lib64/libc.so.6+0x36387)
 #5 0x00007faffaf05a78 abort (/lib64/libc.so.6+0x37a78)
 #6 0x00007faffaefd1a6 __assert_fail_base (/lib64/libc.so.6+0x2f1a6)
 #7 0x00007faffaefd252 (/lib64/libc.so.6+0x2f252)
 #8 0x0000000001b866d8
llvm::MemorySSAUpdater::fixupDefs(llvm::SmallVectorImpl<llvm::WeakVH> const&)
(/home/suocy/bin/llvm-dev/bin/opt+0x1b866d8)
 #9 0x0000000001b869de llvm::MemorySSAUpdater::insertDef(llvm::MemoryDef*,
bool) (/home/suocy/bin/llvm-dev/bin/opt+0x1b869de)
#10 0x000000000281649a (anonymous
namespace)::LoopPromoter::doExtraRewritesBeforeFinalDeletion()
(/home/suocy/bin/llvm-dev/bin/opt+0x281649a)
#11 0x0000000002be7d67
llvm::LoadAndStorePromoter::run(llvm::SmallVectorImpl<llvm::Instruction*>
const&) (/home/suocy/bin/llvm-dev/bin/opt+0x2be7d67)
#12 0x0000000002814bbf
llvm::promoteLoopAccessesToScalars(llvm::SmallSetVector<llvm::Value*, 8u>
const&, llvm::SmallVectorImpl<llvm::BasicBlock*>&,
llvm::SmallVectorImpl<llvm::Instruction*>&,
llvm::SmallVectorImpl<llvm::MemoryAccess*>&, llvm::PredIteratorCache&,
llvm::LoopInfo*, llvm::DominatorTree*, llvm::TargetLibraryInfo const*,
llvm::Loop*, llvm::AliasSetTracker*, llvm::MemorySSAUpdater*,
llvm::ICFLoopSafetyInfo*, llvm::OptimizationRemarkEmitter*)
(/home/suocy/bin/llvm-dev/bin/opt+0x2814bbf)
#13 0x000000000281fe77 (anonymous
namespace)::LoopInvariantCodeMotion::runOnLoop(llvm::Loop*, llvm::AAResults*,
llvm::LoopInfo*, llvm::DominatorTree*, llvm::BlockFrequencyInfo*,
llvm::TargetLibraryInfo*, llvm::TargetTransformInfo*, llvm::ScalarEvolution*,
llvm::MemorySSA*, llvm::OptimizationRemarkEmitter*) (.part.767)
(/home/suocy/bin/llvm-dev/bin/opt+0x281fe77)
#14 0x0000000002820bbd (anonymous
namespace)::LegacyLICMPass::runOnLoop(llvm::Loop*, llvm::LPPassManager&)
(/home/suocy/bin/llvm-dev/bin/opt+0x2820bbd)
#15 0x0000000001b452b3 llvm::LPPassManager::runOnFunction(llvm::Function&)
(/home/suocy/bin/llvm-dev/bin/opt+0x1b452b3)
#16 0x00000000022cdb58 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/suocy/bin/llvm-dev/bin/opt+0x22cdb58)
#17 0x00000000022ce5f9 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/suocy/bin/llvm-dev/bin/opt+0x22ce5f9)
#18 0x00000000022cd403 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/suocy/bin/llvm-dev/bin/opt+0x22cd403)
#19 0x000000000071abdb main (/home/suocy/bin/llvm-dev/bin/opt+0x71abdb)
#20 0x00007faffaef0555 __libc_start_main (/lib64/libc.so.6+0x22555)
#21 0x00000000007cd705 _start (/home/suocy/bin/llvm-dev/bin/opt+0x7cd705)
Aborted

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