go home lldb, you're drunk.

davide@Davidinos-Mac-Pro ~/w/l/b/bin> ./clang ./pat.c -o pat -O1 -g
davide@Davidinos-Mac-Pro ~/w/l/b/bin> cat pat.c
int f(int x) {
  asm("");
  return 0;
}

__attribute__((noinline))
int g(int x) {
  return x;
}

int main() {
  int patatino = g(23);
  return f(patatino);
}

davide@Davidinos-Mac-Pro ~/w/l/b/bin> ./lldb ./pat
(lldb) target create "./pat"
Current executable set to './pat' (x86_64).
(lldb) b main
Breakpoint 1: where = pat`main + 4 at pat.c:13, address = 0x0000000100000fa4
(lldb) r
Process 12229 launched: '/Users/davide/work/llvm-monorepo/build-release/bin/pat' (x86_64)
pat was compiled with optimization - stepping may behave oddly; variables may not be available.
Process 12229 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
    frame #0: 0x0000000100000fa4 pat`main at pat.c:13 [opt]
   10
   11  	int main() {
   12  	  int patatino = g(23);
-> 13  	  return f(patatino);
   14  	}
(lldb) frame var patatino
(int) patatino = <no location, value may have been optimized out>

(lldb) s
Process 12229 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = step in
    frame #0: 0x0000000100000f84 pat`f(x=1) at pat.c:3 [opt]
   1   	int f(int x) {
   2   	  asm("");
-> 3   	  return 0;
   4   	}
   5
   6   	__attribute__((noinline))
   7   	int g(int x) {
(lldb) frame var x
(int) x = 1