[llvm-bugs] [Bug 50417] New: wrong code caused by "-load-store-vectorizer -attributor -attributor"

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50417

            Bug ID: 50417
           Summary: wrong code caused by "-load-store-vectorizer
                    -attributor -attributor"
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Interprocedural Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: cszide at 163.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 24877
  --> https://bugs.llvm.org/attachment.cgi?id=24877&action=edit
small.bc

$clang -v
clang version 13.0.0 (https://github.com/llvm/llvm-project.git
d56729b4a4393da9c65bdfe762b51f8b7b0ce0ca)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/oscar/compiler/llvm-project/build/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
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/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Candidate multilib: .;@m64
Selected multilib: .;@m64

$clang -O3 -c -emit-llvm  -femit-all-decls -mllvm -disable-llvm-optzns small.c

$opt -load-store-vectorizer -attributor -attributor small.bc -o small-opt.bc

$clang small-opt.bc && ./a.out
Segmentation fault (core dumped)

$clang small.c && ./a.out

Besides, without the second -attributor, this bug is disappeared. 

---------------------------------------
int a, b, c, d, e;
void main() {
  int f;
  int *g[][1][5] = {&b, &d, &f, &f, &a, &a, &f, &c, &e};
}

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