Extended Description

It seems to be a recent regression and might be related to #49668 .

[618] % clangtk -v
clang version 13.0.0 (https://github.com/llvm/llvm-project.git 4789fc7)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/suz-local/opfuzz/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
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/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@MX32
Selected multilib: .;@m64
[619] %
[619] % clangtk -O1 small.c; ./a.out
-4
[620] % clangtk -Os small.c
[621] % ./a.out
-2
[622] %
[622] % cat small.c
int printf (const char *, ...);
char a, f;
int b, d;
static int *c = &b;
unsigned char g(unsigned char h, int i) { return h << i; }
void j(int **h) { j(&c); }
int main() {
*c = 0;
d = b | -2;
f = g(d, a == 0);
printf("%d\n", f);
return 0;
}