da-viper wrote:
> okay, so would something like this be sufficient to reproduce the issue (you
> can put the functions in different files as needed):
This should be reproducable but I am not sure if it is the same problem,
because it now skips `fn2` line completely regardless if it is complied with
`-O1` or not. as it never steps over to that address. full context
```sh
(lldb) target create "build/debug/main_c"
Current executable set to
'/home/da-viper/Dev/projects/test_lldb/build/debug/main_c' (x86_64).
(lldb) b main
Breakpoint 1: where = main_c`main + 15 at main.c:5:3, address =
0x000000000040045f
(lldb) r
Process 757816 launched:
'/home/da-viper/Dev/projects/test_lldb/build/debug/main_c' (x86_64)
Process 757816 stopped
* thread #1, name = 'main_c', stop reason = breakpoint 1.1
frame #0: 0x000000000040045f main_c`main at main.c:5:3
2 #include "fn2.h"
3
4 int main() {
-> 5 fn1();
6 fn2();
7 return 0;
8 }
(lldb) dis
main_c`main:
0x400450 <+0>: push rbp
0x400451 <+1>: mov rbp, rsp
0x400454 <+4>: sub rsp, 0x10
0x400458 <+8>: mov dword ptr [rbp - 0x4], 0x0
-> 0x40045f <+15>: mov al, 0x0
0x400461 <+17>: call 0x400480 ; fn1 at fn1.c:3
0x400466 <+22>: mov al, 0x0
0x400468 <+24>: call 0x400480 ; fn1 at fn1.c:3
0x40046d <+29>: xor eax, eax
0x40046f <+31>: add rsp, 0x10
0x400473 <+35>: pop rbp
0x400474 <+36>: ret
(lldb) n
Process 757816 stopped
* thread #1, name = 'main_c', stop reason = step over
frame #0: 0x000000000040046d main_c`main at main.c:7:3
4 int main() {
5 fn1();
6 fn2();
-> 7 return 0;
8 }
(lldb) dis
main_c`main:
0x400450 <+0>: push rbp
0x400451 <+1>: mov rbp, rsp
0x400454 <+4>: sub rsp, 0x10
0x400458 <+8>: mov dword ptr [rbp - 0x4], 0x0
0x40045f <+15>: mov al, 0x0
0x400461 <+17>: call 0x400480 ; fn1 at fn1.c:3
0x400466 <+22>: mov al, 0x0
0x400468 <+24>: call 0x400480 ; fn1 at fn1.c:3
-> 0x40046d <+29>: xor eax, eax
0x40046f <+31>: add rsp, 0x10
0x400473 <+35>: pop rbp
0x400474 <+36>: ret
(lldb)
```
This happens in both lldb-dap and lldb
[reproducer.zip](https://github.com/user-attachments/files/20725969/reproducer.zip)
https://github.com/llvm/llvm-project/pull/143644
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