[llvm-bugs] [Bug 35801] New: opt crashes with "opt -sroa -instcombine -simplifycfg -inline -instcombine -loop-rotate -loop-unswitch -newgvn -correlated-propagation": Assertion `BI->getSuccessor(!isTrueDest) == BBTo && "BBTo isn't a successor of BBFrom"' failed

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35801

            Bug ID: 35801
           Summary: opt crashes with "opt -sroa -instcombine -simplifycfg
                    -inline -instcombine -loop-rotate -loop-unswitch
                    -newgvn -correlated-propagation": Assertion
                    `BI->getSuccessor(!isTrueDest) == BBTo && "BBTo isn't
                    a successor of BBFrom"' 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

Tested with trunk revision 321659. 

$ clangpolly -v
clang version 6.0.0 (http://llvm.org/git/clang.git
d9551a3cb4a454e0818e345bdba510e1cb6dbbdd) (llvm/trunk 321641)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/su/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
$
$ clangpolly -O3 -mllvm -disable-llvm-optzns -c -emit-llvm -o small.bc small.c
$ optpolly -sroa -instcombine -simplifycfg -inline -instcombine -loop-rotate
-loop-unswitch -newgvn -correlated-propagation -o small-opt.bc small.bc
optpolly: /home/su/software/tmp/polly/llvm/lib/Analysis/LazyValueInfo.cpp:1213:
bool getEdgeValueLocal(llvm::Value*, llvm::BasicBlock*, llvm::BasicBlock*,
llvm::ValueLatticeElement&): Assertion `BI->getSuccessor(!isTrueDest) == BBTo
&& "BBTo isn't a successor of BBFrom"' failed.
LLVMSymbolizer: error reading file: No such file or directory
#0 0x000000000205d92a (optpolly+0x205d92a)
#1 0x000000000205bade (optpolly+0x205bade)
#2 0x000000000205bc40 (optpolly+0x205bc40)
#3 0x00007f76406f4330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007f763f4dcc37 gsignal
/build/eglibc-SvCtMH/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007f763f4e0028 abort
/build/eglibc-SvCtMH/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00007f763f4d5bf6 __assert_fail_base
/build/eglibc-SvCtMH/eglibc-2.19/assert/assert.c:92:0
#7 0x00007f763f4d5ca2 (/lib/x86_64-linux-gnu/libc.so.6+0x2fca2)
#8 0x0000000001643358 (optpolly+0x1643358)
#9 0x0000000001646864 (optpolly+0x1646864)
#10 0x0000000001646a38 (optpolly+0x1646a38)
#11 0x0000000001e1df91 (optpolly+0x1e1df91)
#12 0x0000000001e1f6d6 (optpolly+0x1e1f6d6)
#13 0x0000000001b5c6cb (optpolly+0x1b5c6cb)
#14 0x00000000015ccc56 (optpolly+0x15ccc56)
#15 0x0000000001b5d33a (optpolly+0x1b5d33a)
#16 0x00000000008bb79f (optpolly+0x8bb79f)
#17 0x00007f763f4c7f45 __libc_start_main
/build/eglibc-SvCtMH/eglibc-2.19/csu/libc-start.c:321:0
#18 0x000000000092d7d6 (optpolly+0x92d7d6)
Stack dump:
0.      Program arguments: optpolly -sroa -instcombine -simplifycfg -inline
-instcombine -loop-rotate -loop-unswitch -newgvn -correlated-propagation -o
small-opt.bc small.bc
1.      Running pass 'CallGraph Pass Manager' on module 'small.bc'.
2.      Running pass 'Value Propagation' on function '@g'
Aborted (core dumped)
$


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


int a, b, c;

int f (int p) { return p; }

void g ()
{ 
  unsigned d = 0;
  for (; a; d++)
    for (b = 0; b < 2; b++)
      { 
        c = f (a || (f (0), 0)) && d;
        if (c && a)
          a--;
      }
}

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

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