[llvm-bugs] [Bug 42246] New: newgvn crashes with "opt -loop-rotate -constprop -gvn -ipsccp -early-cse -memoryssa -die -newgvn": Assertion `isa<Instruction>(V) && "This should not be used for MemoryAccesses"' failed.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42246

            Bug ID: 42246
           Summary: newgvn crashes with "opt -loop-rotate -constprop -gvn
                    -ipsccp -early-cse -memoryssa -die -newgvn": Assertion
                    `isa<Instruction>(V) && "This should not be used for
                    MemoryAccesses"' failed.
           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 22085
  --> https://bugs.llvm.org/attachment.cgi?id=22085&action=edit
.bc file of the source code

$clang -v
clang version 9.0.0 (trunk 362492)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/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/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
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

$opt -loop-rotate -constprop -gvn -ipsccp -early-cse -memoryssa -die -newgvn
small.bc -o small-opt.bc
opt:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/Transforms/Scalar/NewGVN.cpp:837:
unsigned int {anonymous}::NewGVN::InstrToDFSNum(const llvm::Value*) const:
Assertion `isa<Instruction>(V) && "This should not be used for MemoryAccesses"'
failed.
Stack dump:
0.      Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt -loop-rotate
-constprop -gvn -ipsccp -early-cse -memoryssa -die -newgvn small.bc -o
small-opt.bc 
1.      Running pass 'Function Pass Manager' on module 'small.bc'.
2.      Running pass 'Global Value Numbering' on function '@h'
 #0 0x000055be48eaccea llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x255bcea)
 #1 0x000055be48eaa9a4 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x25599a4)
 #2 0x000055be48eaaae2 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x2559ae2)
 #3 0x00007fb10d37b890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
 #4 0x00007fb10c02de97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
 #5 0x00007fb10c02f801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
 #6 0x00007fb10c01f39a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
 #7 0x00007fb10c01f412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
 #8 0x000055be4712a905 bool llvm::isa<llvm::ConstantInt,
llvm::Value*>(llvm::Value* const&) (.isra.691.part.692)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x7d9905)
 #9 0x000055be48d370fe
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x23e60fe)
#10 0x000055be48d37289 (anonymous
namespace)::NewGVN::MemoryToDFSNum(llvm::Value const*) const
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x23e6289)
#11 0x000055be48d40a13 (anonymous
namespace)::NewGVN::markMemoryUsersTouched(llvm::MemoryAccess const*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x23efa13)
#12 0x000055be48d47389 (anonymous
namespace)::NewGVN::performCongruenceFinding(llvm::Instruction*,
llvm::GVNExpression::Expression const*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x23f6389)
#13 0x000055be48d5179d (anonymous
namespace)::NewGVN::iterateTouchedInstructions()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x240079d)
#14 0x000055be48d53992 (anonymous namespace)::NewGVN::runGVN()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x2402992)
#15 0x000055be48d5576f (anonymous
namespace)::NewGVNLegacyPass::runOnFunction(llvm::Function&) (.part.1399)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x240476f)
#16 0x000055be48869f69 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x1f18f69)
#17 0x000055be4886a061 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x1f19061)
#18 0x000055be488691c1 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x1f181c1)
#19 0x000055be47163889 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x812889)
#20 0x00007fb10c010b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#21 0x000055be471e7aba _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build/bin/opt+0x896aba)
Aborted (core dumped)

-------------------------------------------
int a, b, c;
int(d)();
void e() { a >> 8 & 5 ^ (a ^ 0) & 5; }
static void g() {
  for (; b; 0)
    ;
}
void h() {
  short f;
  d() & c;
}

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