[llvm-bugs] [Bug 34462] New: opt crashes with "opt -jump-threading -mem2reg -gvn -ipsccp -gvn -adce -gvn-hoist": Assertion `UpperBound != 0' failed

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34462

            Bug ID: 34462
           Summary: opt crashes with "opt -jump-threading -mem2reg -gvn
                    -ipsccp -gvn -adce -gvn-hoist": Assertion `UpperBound
                    != 0' failed
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: su at cs.ucdavis.edu
                CC: llvm-bugs at lists.llvm.org

$ clang -v
clang version 6.0.0 (trunk 312462)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/clang-trunk/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.4
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.2.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$ 
$ clang -w -O3 -mllvm -disable-llvm-optzns -c -emit-llvm -o small.bc small.c
$ opt -jump-threading -mem2reg -gvn -ipsccp -gvn -adce -gvn-hoist -o
small-opt.bc small.bc
opt: /tmp/llvm-builder/llvm-source-trunk/lib/Analysis/MemorySSA.cpp:1248: void
llvm::MemorySSA::OptimizeUses::optimizeUsesInBlock(const llvm::BasicBlock*,
long unsigned int&, long unsigned int&,
llvm::SmallVectorImpl<llvm::MemoryAccess*>&,
llvm::DenseMap<{anonymous}::MemoryLocOrCall,
llvm::MemorySSA::OptimizeUses::MemlocStackInfo>&): Assertion `UpperBound != 0'
failed.
#0 0x0000000001f3031a (opt+0x1f3031a)
#1 0x0000000001f2e4ae (opt+0x1f2e4ae)
#2 0x0000000001f2e610 (opt+0x1f2e610)
#3 0x00007fe7428f5330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007fe7416ddc37 gsignal
/build/eglibc-SvCtMH/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007fe7416e1028 abort
/build/eglibc-SvCtMH/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007fe7416d6bf6 __assert_fail_base
/build/eglibc-SvCtMH/eglibc-2.19/assert/assert.c:92:0
#7 0x00007fe7416d6ca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x0000000001557cb3 (opt+0x1557cb3)
#9 0x0000000001559ce2 (opt+0x1559ce2)
#10 0x000000000155a0dc (opt+0x155a0dc)
#11 0x0000000001a51963 (opt+0x1a51963)
#12 0x0000000001a51a0c (opt+0x1a51a0c)
#13 0x0000000001a5227a (opt+0x1a5227a)
#14 0x00000000007fcfb7 (opt+0x7fcfb7)
#15 0x00007fe7416c8f45 __libc_start_main
/build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:321:0
#16 0x0000000000860c6a (opt+0x860c6a)
Stack dump:
0.      Program arguments: opt -jump-threading -mem2reg -gvn -ipsccp -gvn -adce
-gvn-hoist -o small-opt.bc small.bc 
1.      Running pass 'Function Pass Manager' on module 'small.bc'.
2.      Running pass 'Memory SSA' on function '@fn1'
Aborted (core dumped)
$ 


-------------------------------------------


int printf (const char *, ...);

int a, b, c, d, e, f, g, h;

void fn1 ()
{
  long j = -2810502576847672268; 
  int k = j; 
  if (b)
    printf ("0");
  if (k)
    h;
  if (b)
    while (e)
      {
        char l = c || d || a;
        int m, n = m / j;
        m = n = e;
        if (c || (f && j > l))
          printf ("1");
        if (j && l)
          continue;
        e = n;
        if (g)
          return;
      }
}

int main ()
{
  fn1 (); 
  return 0;
}

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