int printf(const char *, ...);
long a;
int b;
long *c = &a;
int(d)(int e, int f) { return e < 0 || e > 7 >> f ? 0 : e << 0; }
int main() {
  b = d(-1, -1);
  *c = b;
  printf("%ld\n", a);
}

$ gcc-12 a.c && ./a.out
0
$ bisheng/clang -O0 a.c && ./a.out
0
$ bisheng/clang -O1 a.c && ./a.out
0
$ bisheng/clang -O2 a.c && ./a.out
warning: Undefined shift transformed to poison value!
[-foverflow-shift-alt-behavior] transform overflow shift to predetermined value.
warning: Undefined shift transformed to poison value!
[-foverflow-shift-alt-behavior] transform overflow shift to predetermined value.
-1
$ bisheng/clang -O3 a.c && ./a.out
warning: Undefined shift transformed to poison value!
[-foverflow-shift-alt-behavior] transform overflow shift to predetermined value.
warning: Undefined shift transformed to poison value!
[-foverflow-shift-alt-behavior] transform overflow shift to predetermined value.
-1

$ bisheng/clang -v
HUAWEI BiSheng Compiler 2.5.0.1 clang version 12.0.0 (clang-4bed3943328c flang-396eaa360043)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /zdata/shaoli/compilers/ccbuilder-compilers
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Candidate multilib: .;@m64
Selected multilib: .;@m64
$